TWI865823B - Heating tip unit - Google Patents

Abstract

The present invention provides a heating tip unit which can make a temperature measuring part of a temperature sensor fully contact a fixing portion of a heating tip. In particular, the present invention provides a heating tip unit 1 in which a thermocouple 3 is installed on a plate-shaped heating tip 2 for thermocompression bonding a terminal wire to a terminal member, wherein the heating tip 2 is provided with: a soldering iron 6 which has a soldering iron front end 13 to be abutted against a terminal wire on a soldering iron body 11; a pair of connecting arms 7which extend upward from the left and right ends of the soldering iron body 11 so as to be separated from each other, and allow a current from a power source to flow in the soldering iron body 11 to raise the temperature of the soldering iron 6; and a temperature-measuring fixing part 35 which is provided on the soldering iron 6 with a temperature measuring contact 3a of the thermocouple 3 being fixed thereon. The temperature-measuring fixing part 35 has a pair of fixing contact surfaces 35a for the temperature measuring contacts 3a to contact, and is set in such a state that the separating distance between the fixing contact surfaces 35a gradually expands from the soldering iron 6 side to the upper side.

Description

Heating nozzle unit

The present disclosure relates to a heating nozzle unit for hot pressing a terminal wire to a terminal component.

The operation of hot-pressing the terminal wire to the terminal component, for example, in the operation of hot-pressing the wire to the terminal part of the iron core when manufacturing electronic parts such as chip inductors, uses a hot-pressing nozzle unit. Specifically, a thermocouple is installed as a temperature sensor on a heating nozzle whose soldering part heats up to form a heating nozzle unit, and this heating nozzle unit is installed on a tool holder of a hot-pressing device. Furthermore, the hot-pressing device is activated to pressurize the terminal wire placed on the terminal component by the soldering part of the heating nozzle and heat it rapidly, so that the terminal wire is hot-pressed to the terminal component (for example, refer to patent document 1).

[Prior Art Literature]

[Patent Literature]

Patent document 1: Japanese Patent Publication No. 2001-284781

However, in the heating nozzle (heating nozzle unit) described in the above patent document, the core wire of the thermocouple is passed through the through hole of the heating nozzle, and arc welding is performed in this state, and the formation of the temperature measuring junction (temperature measuring part of the temperature sensor) and the fixing (joining) of the temperature measuring junction to the heating nozzle are performed simultaneously. However, sometimes the temperature measuring junction cannot be formed due to poor welding, and only the core wire is joined to the heating nozzle, resulting in poor yield. Therefore, it is better to form the temperature measuring junction in advance before fixing the heating nozzle, and make this temperature measuring junction (temperature measuring part) fully contact the heating nozzle, and fix it in this state.

The present invention was developed in view of the above situation, and its purpose is to provide a heating nozzle unit that allows the temperature measuring part of the temperature sensor to fully contact the fixing part of the heating nozzle.

The present invention is proposed to achieve the above-mentioned purpose. Item 1 is a heating nozzle unit, which is formed by installing a temperature sensor on a plate-shaped heating nozzle used to heat-press the terminal wire to the terminal component.

The aforementioned heating nozzle is equipped with:

The soldering iron part is formed by the soldering iron body having a front end of the soldering iron that abuts against the aforementioned terminal wire;

A pair of connecting arms extend upward from the left and right ends of the aforementioned soldering iron body and separate from each other, and allow current from a power source to flow through the soldering iron body to increase the temperature of the soldering iron portion; and

The temperature measuring fixing part is arranged on the aforementioned soldering iron part, and is used to fix the temperature measuring part of the temperature sensor.

The aforementioned temperature measuring fixed part has a pair of fixed contact surfaces for the temperature measuring part to contact, and the fixed contact surfaces are set to be separated from each other in a state where the distance between them gradually expands from the side of the soldering iron part toward the top.

Item 2 is a heating nozzle unit as described in Item 1, wherein the aforementioned fixing contact surface is formed as a plane, and the aforementioned temperature measuring part is formed as a sphere.

Item 3 is a heating nozzle unit as described in Item 2, wherein the gap between the aforementioned connecting arms is used as a wire storage space and the wires of the temperature sensor are stored in the wire storage space.

And the aforementioned fixing contact surface is opposite to the end of the wire storage space.

Item 4 is a heating nozzle unit as described in any one of items 1 to 3, wherein the heating nozzle has an oxidation-resistant coating layer formed on at least the surface of the soldering part and the temperature measuring fixing part.

Item 5 is a heating nozzle unit as described in Item 4, wherein an oxidation-resistant coating layer is formed on the surface of the temperature measuring portion fixed to the aforementioned temperature measuring fixing portion.

Item 6 is a heating nozzle unit as described in Item 4 or 5, wherein the oxidation-resistant coating layer is a nickel coating.

According to the present invention, the following excellent effects can be achieved.

According to the invention described in item 1, since the aforementioned temperature measuring fixing part has a pair of fixing contact surfaces for the temperature measuring part to contact, and the distance between the fixing contact surfaces is set to gradually expand from the side of the soldering part to the top, the temperature measuring part of the temperature sensor can fully contact the temperature measuring fixing part. Therefore, a heating nozzle unit can be constructed that can perform good fixing of the temperature measuring part to the heating nozzle, and thus can perform good temperature measurement.

According to the invention described in item 2, since the aforementioned fixing contact surface is formed as a plane and the aforementioned temperature measuring part is formed as a sphere, the temperature measuring part is easy to make point contact with the fixing contact surface. In addition, if the temperature measuring part is pressed against the fixing contact surface, the stress is easy to concentrate and the temperature measuring part is not easy to float from the fixing contact surface. In this way, the temperature measuring part can be fixed to the heating nozzle more effectively, and the temperature measurement of the heating nozzle can be performed more effectively.

According to the invention described in item 3, since the gap between the aforementioned connecting arms is used as the wire storage space and the wires of the temperature sensor are stored in the wire storage space, and the aforementioned fixing contact surface is made to face the end of the wire storage space, if the temperature sensor is inserted into the wire storage space with the temperature measuring part at the front, the temperature measuring part can be easily abutted against the fixing contact surface. Therefore, preparations for fixing the temperature measuring part of the temperature sensor to the temperature measuring fixing part can be smoothly performed.

According to the invention described in items 4 to 6, even if the temperature is repeatedly raised and cooled, surface oxidation can be suppressed and durability can be improved.

1: Heating nozzle unit

2,2’: Heating nozzle

3: Thermocouple

3a: Temperature measurement junction

3b: Conductor wire

6,6’: Iron-making department

7: Connecting arm

11: Soldering iron body

13: Front end of soldering iron

13a: Front end of soldering iron

15: Soldering iron recess

17: Mounting hole

20,20’: Groove

21: Thin wall part

25: Core wire

26: Core wire coating material

27: External covering material

30: Wire storage space

30a: Open mouth

31: Stopping recess

32: Wire stopper

35: Temperature measurement and fixing part

35a: Fixed contact surface

36: Groove

40: Iron space

A: Wire for terminal

B: Terminal components

t1,t2: thickness

Figure 1 is a three-dimensional diagram of the heating nozzle unit.

Figure 2 is an explanatory diagram of the heating nozzle, (a) is a top view, (b) is a front view, (c) is a bottom view, and (d) is a side view.

Figure 3 is an explanatory diagram of the temperature measuring fixing part of the heating nozzle, (a) is a front view, and (b) is a cross-sectional view.

Figure 4 is an explanatory diagram of the procedure for installing a thermocouple in a heating nozzle, (a) is the state before the thermocouple is inserted into the heating nozzle, (b) is the state after the thermocouple is inserted into the heating nozzle, and (c) is the state after resin is injected into the wire storage space and the blocking recess as a wire stopper.

Figure 5 is a three-dimensional diagram of a heating nozzle with two soldering parts.

Figure 6 is an explanatory diagram of a heating nozzle having two soldering parts, (a) is a top view, (b) is a front view, (c) is a bottom view, and (d) is a side view.

The following is an illustration of the form used to implement the present invention.

As shown in Fig. 1 and Fig. 2, the heating nozzle unit 1 is composed of the following: a plate-shaped heating nozzle 2 for hot-pressing the terminal wire A to the terminal member B (refer to Fig. 2 (d)); and a thermocouple 3 installed on the heating nozzle 2 as a temperature sensor. The heating nozzle 2 is a nozzle formed by processing a plate of a conductive material (tungsten, molybdenum, superhard material, etc.) by wire discharge machining, and as shown in Fig. 2, it is composed of the following components: a soldering iron part 6, which is the lower part of the heating nozzle 2 (the front end located on the side of the workpiece (terminal wire A or terminal member B)); and a pair of left and right connecting arm parts 7, which are the upper part (base). Furthermore, the soldering part 6 can generate heat through resistance when electricity is supplied to the soldering part 6 via the connecting arm part 7, and the temperature of the soldering part 6 can be measured by the thermocouple 3.

The soldering part 6 includes a horizontally long soldering body 11 for connecting the lower parts of the connecting arms 7, and the horizontal width (the dimension along the horizontal direction in which the pair of connecting arms 7 are arranged) of the soldering body 11 is set to be gradually narrowed toward the lower part of the heating nozzle 2. In addition, at the bottom of the soldering body 11 protruding slightly downward, a box-shaped soldering front end 13 is protruded downward, and the bottom surface (front end surface) of the soldering front end 13 is made as a soldering front end surface 13a so as to be contactable with the terminal wire A. Furthermore, a substantially rectangular soldering recess 15 is formed at the upper portion (connection arm 7 side) opposite to the soldering front end portion 13 of the soldering body 11, and a temperature measuring junction (temperature measuring portion) 3a of the thermocouple 3 is fixed in the soldering recess 15. In addition, the structure for fixing the temperature measuring junction 3a will be described in detail later.

The connecting arm 7 is a longitudinal component extending upward from the left and right ends of the soldering iron body 11, and is provided in a state where the connecting arm 7 is separated from each other. In addition, the upper part (extended end) of the connecting arm 7 is penetrated in the plate thickness direction of the heating nozzle 2 by a mounting hole 17 for mounting to a nozzle holder (not shown) of a hot pressing device, and the mounting bolt (not shown) passing through the mounting hole 17 is screwed into the nozzle holder, and the heating nozzle unit 1 is mounted to the nozzle holder in a posture where the front end 13 of the soldering iron faces downward.

In the nozzle unit 1 mounted on the nozzle holder, one connecting arm 7 is electrically connected to one end of a power source (not shown) for a heater of the heat pressing device, and the other connecting arm 7 is electrically connected to the other end of the power source for the heater. Furthermore, when a current is passed from the power source (power source for the heater) to the nozzle 2, the current passes through the connecting arm 7 and flows in the solder body 11, causing the solder body 11 to generate heat through the resistance in the solder body 11, and the solder tip 13 is heated by the heat. In addition, although the current in the solder body 11 flows from one side of the connecting arm 7 to the other side of the connecting arm 7, the cross-sectional area of the reduced diameter portion located at the corner of the solder recess 15 in the current flow path is narrower than the cross-sectional area of other portions, so the current density becomes the highest at the reduced diameter portion, and it is easy to generate Joule heat caused by resistance centered at this portion.

Furthermore, as shown in FIG. 1 and FIG. 2(d), the heating nozzle 2 is configured such that the groove 20 as the planing portion of the present invention extends in the left-right direction (from the connecting arm 7 on one side toward the connecting arm 7 on the other side) in the range from the lower part of the connecting arm 7 to the soldering iron body 11 on both the front and back sides of the heating nozzle 2, and the thin-walled portion 21 is formed by the extension of the groove 20 on the front and back sides, and the soldering iron front end portion 13 is protruded below the thin-walled portion 21. In other words, the thin-walled portion 21 is formed at a position offset from the soldering iron front end portion 13 (to be specific, closer to the connecting arm 7 side than the soldering iron front end portion 13).

2( d ), the depth dimension of the groove 20 on the front and back sides (the dimension of the heating nozzle 2 in the plate thickness direction) is set to be the same, and the centers of the connecting arm portion 7, the soldering iron body 11 (thin-walled portion 21 ), and the soldering iron tip portion 13 in the thickness direction are located on the same plane, and the plate thickness of the soldering iron tip portion 13 is set to be the same as the plate thickness of the connecting arm portion 7. Furthermore, the surface of the thin-walled portion 21 that becomes the bottom of the groove 20 is set as the side surface (front and back) of the solder body 11, and the plate thickness of the solder body 11 (plate thickness of the thin-walled portion 21) is set to be thinner than the plate thickness of the connecting arm portion 7, and the cross-sectional area of the solder body 11 (in other words, the cross-sectional area of the flow path for the supply current to flow) is set to be smaller than the cross-sectional area of the connecting arm portion 7. Furthermore, the thickness t1 of the side surface of the solder body 11 is formed to be thinner than the thickness t2 of the connecting arm portion 7 (specifically, the thickness of the connecting arm portion 7 after removing the thin-walled portion 21 (the thickness of the portion of the connecting arm portion 7 that is offset from the thin-walled portion 21)) (refer to Figures 1 and 2 (d)).

Next, the thermocouple 3 installed on the heating nozzle 2 and the structure of the heating nozzle 2 for installing the thermocouple 3 are described.

As shown in Figures 1 and 3, the thermocouple 3 is a spherical temperature measuring junction (temperature measuring part) 3a formed by welding the front ends of two core wires 25 together, and each core wire 25 is covered by a core wire coating material 26 having electrical insulation, and is further bundled into one by covering with an outer coating material 27 to form a wire 3b. In other words, the wire 3b is formed in a manner that includes the core wire 25. Furthermore, the diameter of the temperature measuring junction 3a and the wire diameter of the wire 3b are set to be smaller than the plate thickness of the heating nozzle 2.

Furthermore, in the heating nozzle 2, a portion for accommodating the wire 3b is provided in the gap between the connecting arms 7, and a portion for fixing the temperature measuring junction 3a is provided in the soldering iron portion 6. Specifically, as shown in FIG. 1 and FIG. 2 (a) and (b), the gap between the connecting arms 7 extending along the longitudinal direction of the connecting arms 7 is set to have a width (thickness, width) one circle larger than the wire diameter of the wire 3b as a wire accommodating space 30 with an upper end portion opened, and in the wire accommodating space 30, the wire 3b (specifically, the portion of the wire 3b located near the temperature measuring junction 3a) is accommodated in a state where the wire 3b does not protrude outward from the front and back surfaces of the heating nozzle 2. Furthermore, the wire 3b is extended from the opening 30a at the upper end of the wire storage cavity 30, and the lower end of the wire storage cavity 30 is expanded to connect to the soldering iron recess 15 (refer to Figure 1).

Furthermore, in each connecting arm portion 7, a portion of the side surface facing the wire storage cavity 30 is notched and a stopper recess 31 is formed in a state of being connected to the wire storage cavity 30, and each stopper recess 31 and a portion of the wire storage cavity 30 (a portion located between the stopper recesses 31) are provided with a wire stopper 32 in a manner that is hardened after injecting a resin such as an ultraviolet curing resin or a thermosetting resin, and the wire stopper 32 prevents the wire 3b from deviating from the wire storage cavity 30 and protruding from the heating nozzle 2.

In addition, a temperature measuring fixing portion 35 for fixing the temperature measuring contact 3a of the thermocouple 3 is provided at the end (lower end) of the soldering concave portion 15 formed in the soldering portion 6 facing the wire storage hollow portion 30 in a state of protruding toward the upper connecting arm portion 7 side. As shown in FIG. 3 , the temperature measuring fixing portion 35 is a protrusion protruding from the soldering body 11 on the opposite side to the soldering tip portion 13, and is formed to be smaller than the soldering tip portion 13. In addition, a pair of fixing contact surfaces 35a for the temperature measuring contact point 3a to contact are provided at the portion facing the wire housing hollow portion 30 (the upper portion of the temperature measuring fixing portion 35) and are arranged to face the end of the wire housing hollow portion 30, and the distance between the fixing contact surfaces 35a gradually increases from the soldering iron portion 6 side toward the upper wire housing hollow portion 30 side. Furthermore, by forming each fixing contact surface 35a as a plane, a V-shaped groove 36 is formed on the upper part of the temperature measuring fixing part 35 (becoming the upper part of the wire storage hollow part 30 side), and the temperature measuring contact 3a is received in the groove 36 so as to contact the fixing contact surface 35a, and the temperature measuring contact 3a is fixed to the soldering part 6 (temperature measuring fixing part 35) by welding or the like in this state.

Next, the manufacturing process of the heating nozzle unit 1 is explained, especially the installation process of the thermocouple 3 to the heating nozzle 2.

First, as shown in FIG4(a), the heating nozzle 2 and the thermocouple 3, which are separately manufactured in advance, are arranged in a state where the opening 30a of the wire storage space 30 and the temperature measuring junction 3a are opposite to each other, and the posture of the heating nozzle 2 and the thermocouple 3 are set, and arranged on the same straight line in the order of the temperature measuring fixing part 35, the wire storage space 30, the temperature measuring junction 3a, and the wire 3b. If the posture of the heating nozzle 2 and the thermocouple 3 is set, the thermocouple 3 is inserted into the opening 30a of the wire storage space 30 of the heating nozzle 2 with the temperature measuring junction 3a as the front. Then, the side surface of the connecting arm 7 becomes a guide to guide the thermocouple 3 to the side of the soldering iron part 6.

Furthermore, when the thermocouple 3 is deeply inserted, as shown in FIG4(b), the temperature measuring contact 3a enters the soldering iron recess 15 after passing through the wire storage cavity 30. Here, as shown in FIG3(a), in the soldering iron 6, since the temperature measuring fixing portion 35 is provided at the position facing the lower end of the wire storage cavity 30 (the open end of the soldering iron 6 side), and the V-shaped fixing contact surface 35a is made to face the end of the wire storage cavity 30, the temperature measuring contact 3a entering the soldering iron recess 15 reaches the temperature measuring fixing portion 35 and contacts (contacts) the fixing contact surface 35a. In this way, the temperature measuring contact 3a can be easily and reliably contacted with the fixing contact surface 35a (temperature measuring fixing portion 35). Therefore, preparations for fixing the temperature measuring contact 3a to the temperature measuring fixing portion 35 can be smoothly performed.

Furthermore, the lead wire 3b is pushed toward the temperature measuring fixing part 35 to maintain the contact of the temperature measuring contact point 3a with the fixing contact surface 35a, and in this state, the temperature measuring contact point 3a and the fixing contact surface 35a are fixed (fused) by laser welding. Specifically, the laser is irradiated to the fixing contact surface 35a to heat it, and the temperature measuring contact point 3a is fixed (fused) by melting it with this heat. At this time, as shown in FIG. 3(a), since the distance between the fixing contact surfaces 35a in the temperature measuring fixing part 35 is set to gradually expand from the side of the soldering iron part 6 toward the top, the temperature measuring contact point 3a can be fully contacted with the temperature measuring fixing part 35. Therefore, a heater unit 1 can be constructed that can perform good fixation of the temperature measuring contact 3a to the heater 2, and can perform good temperature measurement. Furthermore, since the fixing contact surface 35a is formed as a plane and the temperature measuring contact 3a is formed as a sphere, the temperature measuring contact 3a is easy to perform point contact with the fixing contact surface 35a. In addition, by pressing the temperature measuring contact 3a against the fixing contact surface 35a, stress is easily concentrated and the temperature measuring contact 3a is not easy to float from the fixing contact surface 35a. In this way, the temperature measuring contact 3a can be fixed to the heater 2 more well, and the temperature measurement of the heater 2 can be performed more well.

If the temperature measuring contact 3a has been fixed to the temperature measuring fixing part 35, as shown in FIG4(c), a part of the wire accommodating space 30 (the part between the stopper recesses 31) and the stopper recesses 31 are filled with a resin such as an ultraviolet curing resin or a thermosetting resin in a state before curing (flowing state), and then a resin curing treatment such as ultraviolet irradiation or heating is performed to cure the resin to form a wire stopper 32.

In the nozzle unit 1 formed by installing the thermocouple 3 in the nozzle 2 in this way, the wire 3b of the thermocouple 3 is stored in the wire storage space 30, so that the wire 3b of the thermocouple 3 can be prevented from exceeding the thickness range of the nozzle 2. Therefore, when the nozzle unit 1 is installed in the hot press welding device or when the nozzle unit enters the working area, it is not easy to accidentally get the wire 3b stuck or even the thermocouple 3 falls off the nozzle. In addition, when multiple nozzle units 1 are to be integrated during transportation (shipping) or storage, the nozzle units 1 can be stacked stably without obstacles, and the transportation or storage operation can be smoothly performed.

Furthermore, since the wire storage cavity 30 is provided with the wire stopper 32, the defect of the stored wire 3b falling out of the wire storage cavity 30 can be prevented. In addition, since the resin injected into the wire storage cavity 30 and hardened is used as the wire stopper 32, it is easy to put the resin as the wire stopper 32 into the gap between the connecting arm portion 7 and the wire 3b, and the wire 3b can be fully stopped. Furthermore, since the stopper recess 31 connected to the wire storage space 30 is provided, and the resin belonging to the wire stopper 32 is injected into the wire storage space 30 and the stopper recess 31 and hardened, the wire stopper 32 is not easy to fall off from the wire storage space 30, and the defect that the wire 3b will fall off from the wire storage space 30 together with the wire stopper 32 can be suppressed.

Furthermore, as an operation of heat-pressing the terminal wire A to the terminal member B using the heating nozzle unit 1, first, the heating nozzle unit 1 is installed on the nozzle holder of the heat-pressing device with the front end portion 13 of the soldering iron facing downward, and the wire 3b of the thermocouple 3 is connected to the thermocouple connection terminal (not shown) of the heat-pressing device. Thereafter, the terminal member B and the terminal wire A are placed in a working area (not shown) below the nozzle holder, and the terminal wire A is overlapped on the terminal member B. If the terminal member B and the terminal wire A are already installed, the heating nozzle unit 1 is lowered together with the nozzle holder to push the front end 13 of the soldering iron toward the terminal wire A, and the soldering iron body 11 is heated by energizing the heating nozzle 2, so that the terminal wire A is thermally pressed to the terminal member B. In addition, the temperature of the soldering iron part 6 is measured by the thermocouple 3, and the control unit (not shown) of the thermal pressing device controls the power supply of the heating nozzle 2 according to the measured value, thereby controlling the temperature of the front end 13 of the soldering iron.

Here, in the heating nozzle 2 that generates heat, the plate thickness of the solder body 11 is set to be thinner than the plate thickness of the connecting arm portion 7, and the cross-sectional area of the solder body 11 is set to be smaller than the cross-sectional area of the connecting arm portion 7. Therefore, even if the plate thickness of the heating nozzle 2 is set to be thick, the defect that the current density in the solder body 11 is reduced and the heating becomes insufficient can be suppressed. Therefore, it is easy to achieve good heating efficiency regardless of the increase or decrease in the plate thickness of the heating nozzle 2. In addition, it is possible to avoid an increase in the volume of the solder body 11, thereby avoiding an increase in heat capacity, and it is easy to quickly cool the solder body 11 or the solder tip 13. Furthermore, since the groove 20 is extended from the lower part of the connecting arm 7 to the range of the soldering iron body 11 to form the thin-walled part 21, and the surface of the thin-walled part 21 which becomes the bottom of the groove 20 is set as the side surface of the soldering iron body 11, the structure of the heating nozzle 2 in which the plate thickness of the soldering iron body 11 is thinner than the plate thickness of the connecting arm 7 can be easily realized.

Furthermore, since the solder tip 13 is protrudingly provided below the thin-walled portion 21, when foreign matter (such as the insulation coating of the terminal wire A) is attached to the solder tip 13 due to the hot pressing operation, the foreign matter can be easily removed by grinding the front end of the solder tip 13. Furthermore, the grinding margin of the front end of the solder tip 13 can be sufficiently ensured, and the replacement cycle (service life) of the heater unit can be prolonged. Furthermore, since the thin-walled portion 21 is formed closer to the connecting arm portion 7 than the solder tip portion 13, and the thickness of the side surface of the solder body 11 is formed thinner than the thickness of the connecting arm portion 7 after the thin-walled portion 21 is removed, the reduction of the current density in the solder body 11 can be suppressed, and the dimension in the plate thickness direction in the front end surface of the solder tip portion 13 can be sufficiently ensured. Thereby, the permissible range of the size of the workpiece (hot pressing object) that can be hot-pressed by the heating nozzle 2 can be expanded. In addition, since the thin-walled portion 21 is formed at a position offset from the front end portion 13 of the soldering iron, and the plate thickness of the front end portion 13 of the soldering iron is set to be the same as the plate thickness of the connecting arm portion 7, it is not necessary to increase or decrease the plate thickness of the front end portion 13 of the soldering iron relative to the plate thickness of the connecting arm portion 7, and the heating nozzle 2 is easy to manufacture.

Furthermore, since the centers of the connecting arm 7, the solder body 11, and the solder front end 13 in the thickness direction are located on the same plane, it is not easy to generate a bending moment in the heating nozzle 2 during the hot pressing operation, which can suppress the defect of applying an excess load to the heating nozzle 2, and further suppress the defect of the heating nozzle 2 being easily damaged. Furthermore, since a thermocouple 3 is installed on the solder part 6 of the heating nozzle 2 as a temperature sensor, the temperature information of the solder part 6 can be obtained and used for controlling the heating of the heating nozzle 2. In addition, the temperature sensor can be realized by a simple structure.

However, in the above-mentioned embodiment, the soldering body 11 is configured by extending the groove 20 to both the front and back surfaces of the heating nozzle 2 to form the thin-walled portion 21, but the present invention is not limited thereto. In short, as long as the plate thickness of the soldering body 11 is set to be thinner than the plate thickness of the connecting arm portion 7, and the cross-sectional area of the soldering body 11 is set to be smaller than the cross-sectional area of the connecting arm portion 7, the heating nozzle 2 may have any type of soldering body 11. For example, the soldering body 11 may be configured by extending the groove to either the front or back surface of the heating nozzle 2 to form the thin-walled portion 21. However, the solder body 11 will be biased to be located on either the front or back side of the heating nozzle 2, and thus, a bending moment will occur in the heating nozzle 2 during the hot pressing operation. Therefore, it is better to adopt a structure in which the centers of the thickness directions of the connecting arm 7, the solder body 11, and the solder front end 13 are located on the same plane, that is, the structure of the above-mentioned embodiment. In addition, the solder body 11 can be a structure that includes the part with the highest resistance (the part that becomes the heating part). Therefore, the area that seeks to be thinned by grooves, etc. can be within the connecting arm 7, and may not necessarily be the entire area of the solder body 11.

In addition, although the plate thickness of the soldering tip 13 and the plate thickness of the connecting arm 7 are set to the same dimension, the present invention is not limited thereto. For example, if the plate thickness of the soldering tip 13 is reduced and set to be thinner than the plate thickness of the connecting arm 7, the degree of freedom of the plate thickness dimension of the soldering tip 13 can be increased, and it is easy to design the heating nozzle 2 corresponding to the size of the workpiece (terminal member B, terminal wire A) to be subjected to the hot pressing process. Furthermore, as shown in FIG. 3, although the temperature measuring fixing portion 35 is configured to be smaller than the soldering tip 13 as a whole, the present invention is not limited thereto. For example, as long as the volume of the soldering iron tip 13 is set to be consistent with the volume of the temperature measuring fixing part 35 to avoid the difference in heat capacity between the soldering iron tip 13 and the temperature measuring fixing part 35 being extremely different, the temperature change at the temperature measuring fixing part 35 can be synchronized with the temperature change at the soldering iron tip 13, and it is easy to perform temperature management of the soldering iron tip 13 based on the temperature measurement of the temperature measuring fixing part 35.

Furthermore, although the fixing contact surface 35a of the temperature measuring fixing part 35 is formed as a plane, the present invention is not limited to this. In short, as long as the distance between the fixing contact surfaces 35a is set to gradually expand from the side of the soldering iron part 6 toward the top, the fixing contact surface 35a can also be formed as a curved surface. Furthermore, as long as the temperature measuring junction (temperature measuring part) 3a can fully contact the fixing contact surface 35a, it is not limited to forming the temperature measuring junction 3a into a spherical body, and it can be formed into any shape. In addition, although the temperature measuring junction 3a of the thermocouple 3 is fixed to the temperature measuring fixing part 35 by welding, the present invention is not limited to this. In short, as long as the temperature of the soldering iron part 6 can be measured, the fixing method of the temperature measuring contact 3a and the temperature measuring fixing part 35 is not limited. For example, a fixing agent (adhesive) with good thermal conductivity can also be used to fix the temperature measuring contact 3a and the temperature measuring fixing part 35.

Furthermore, in the heating nozzle 2 of the above-mentioned embodiment, although the wire storage cavity 30 is configured to extend in a straight line along the long side direction of the connecting arm portion 7, the present invention is not limited thereto. In short, as long as the configuration is capable of accommodating the wire 3b of the thermocouple 3, any form of wire storage cavity 30 can be applied. For example, a wire storage cavity 30 extending in a bent line or a curved line can be applied. In addition, although a resin such as an ultraviolet curing resin or a thermosetting resin is exemplified as the wire stopper 32 in the present invention, the present invention is not limited thereto. In short, as long as the wire 3b stored in the wire storage cavity 30 can be stopped from falling out of the wire storage cavity 30, the wire stopper 32 is not limited. For example, a cap that can be fitted into the wire storage cavity 30 can be used as the wire stopper, or a protrusion that is integrally formed on the connecting arm 7 and protrudes toward the wire storage cavity 30 can be used as the wire stopper.

In addition, although the stopper recess 31 connected to the wire storage cavity 30 is formed by a shallow notch on the side of the wire storage cavity 30, the present invention is not limited to this. In short, as long as the resin belonging to the wire stopper 32 is injected from the wire storage cavity 30 to the stopper recess 31 and can be hardened, the structure of the stopper recess 31 can be adopted in any form. For example, it is also possible to form a stopper recess with a groove shape on both the front and back surfaces of the connecting arm 7, and connect the end of the stopper recess to the wire storage cavity 30 so that the resin (wire stopper 32) is injected from the wire storage cavity 30 to the stopper recess.

Furthermore, in the above-mentioned embodiment, although the thermocouple 3 is illustrated as the temperature sensor of the present invention, and the temperature measuring junction 3a of the thermocouple 3 is illustrated as the temperature measuring part of the present invention, it is not limited to this. In short, as long as the temperature of the soldering part 6 can be measured and the temperature sensor having a temperature measuring part at the end of the wire 3b, any type of temperature sensor can be used and installed on the heating nozzle 2.

However, in the above-mentioned embodiment, although the groove 20 is illustrated as the grooved portion of the present invention, the present invention is not limited thereto. In short, as long as the grooved portion is extended in the direction from one connecting arm portion toward the other connecting arm portion to form a thin-walled portion as a heating nozzle, the grooved portion can be set in any form. For example, in the heating nozzle 2" of the second embodiment shown in Figures 5 and 6, although it is basically the same as the above-mentioned embodiment (first embodiment), the difference is that the grooved portion is formed not only on the front and back surfaces of the heating nozzle 2", but also in the middle part of the heating nozzle 2' in the plate thickness direction, so that the lower half of the heating nozzle 2' is branched into two branches, thereby having two soldering iron bodies.

Specifically, the heating nozzle 2' has a soldering space 40 extending in the left-right direction (from one connecting arm 7 toward the other connecting arm 7) as a groove portion in the middle portion of the soldering portion 6' located at the lower part of the heating nozzle 2' in the plate thickness direction, and the soldering space 40 is opened downward. Furthermore, the soldering body 11 and the soldering tip 13 are provided on both the front and back sides of the heating nozzle 2' via the soldering space 40. In other words, the soldering portion 6' of the heating nozzle 2' has two soldering bodies 11 separated from each other and two soldering tip 13 separated from each other. Furthermore, in each solder body 11, a groove 20 is formed on the outer surface, and a groove 20' is also formed on the inner surface. In addition, each solder recess 15 is provided with a temperature measuring fixing portion 35 protruding therefrom, and the temperature measuring junction (temperature measuring portion) 3a of the thermocouple 3 can be fixed to each temperature measuring fixing portion 35. In each solder tip portion 13, the plate thickness of the solder tip portion 13 is set to be thinner than the plate thickness of the connecting arm portion 7.

As long as the heating nozzle 2' with the soldering part 6' is constructed, two parts can be heat-pressed by two soldering front ends 13 at the same time, and the efficiency of the heat-pressing operation can be improved. In addition, by setting the size of the soldering space 40 in the plate thickness direction, the distance (spacing) between the two soldering front ends 13 or the size of the soldering front end surface 13a of each soldering front end 13 can be adjusted according to the workpiece.

In addition, in the aforementioned embodiment, an oxidation-resistant coating layer may be formed on the surface of the heating nozzle to improve oxidation resistance.

The following explains the oxidation-resistant coating layer.

In the heating nozzle, each heat-pressing will repeatedly heat up and cool down, so the surface is easy to oxidize, especially near the soldering part 6 (heating part) and the part where the thermocouple 3 is welded. Therefore, the oxidized part near the heating part will peel off and reduce the strength, which will cause defects such as breakage during pressurization. In addition, the welded part of the thermocouple will corrode and reduce the strength, eventually causing defects such as the thermocouple detaching and becoming unusable.

Therefore, in this embodiment, an oxidation-resistant coating layer is formed on the surface of the heating nozzle to improve oxidation resistance. The following is a specific description including the manufacturing steps.

First. Regarding the metal plate that becomes the material (base material), specifically, it is better to use the tungsten (hardness of about HV430) that is generally used in the past, and the so-called superhard material (hardness of HV900 to 2400) (official name: superhard alloy, an alloy formed by sintering hard metal carbide powder) with better wear resistance than tungsten alloy (hardness of about HV200 to 400), and the plate of this superhard material is cut into a predetermined shape by wire cutting. Then, the cut piece is subjected to pre-plating treatment, and then immersed in a dissolving tank and energized, so that an oxidation-resistant coating layer formed by nickel is formed on the surface of the aforementioned cut piece, that is, nickel plating is performed. After that, it is pulled out from the dissolving tank and subjected to post-treatment such as washing.

Furthermore, similar to the above-mentioned embodiment, the temperature measuring junction 3a of the thermocouple 3 is laser welded to the temperature measuring fixing part 35. In this welding, since a nickel layer is formed on the surface (fixing contact surface 35a) of the temperature measuring fixing part 35, the wettability is improved, thereby improving the reliability and strength of welding. In addition, when the wettability during welding is improved, the output of the laser can be suppressed more than before, and the damage to the substrate can be suppressed, and the quality improvement and energy consumption saving can be sought.

If the welding of the thermocouple 3 is completed, the pre-plating treatment is further performed, and the heating nozzle unit 1 equipped with the thermocouple 3 is immersed in the electrolyte, and the entire surface including the temperature measuring junction 3a of the thermocouple 3 is nickel plated.

When the heating nozzle unit 1 manufactured in this way is used, the oxidation resistance is improved, so the peeling or strength reduction caused by oxidation of the soldering part 6 or the mounting part of the thermocouple 3 can be suppressed, and the durability can be improved. In particular, when the substrate uses a superhard material and nickel plating is performed, the wettability is improved and the weldability can also be improved, which can reliably improve the durability. In addition, since the main component of the thermocouple is nickel, the affinity of nickel plating is good. In addition, the oxidation-resistant coating is not limited to nickel plating, for example, it can also be gold plating, etc.

Furthermore, all viewpoints of the aforementioned implementation forms are illustrative and should not be considered to limit the present invention. The present invention is not limited to the above description, but should be shown in the scope of the patent application, which includes all changes within the meaning and scope equivalent to the scope of the patent application.

1: Heating nozzle unit

2: Heating nozzle

3: Thermocouple

3a: Temperature measurement junction

3b: Conductor wire

6: Iron-making department

7: Connecting arm

11: Soldering iron body

13: Front end of soldering iron

13a: Front end of soldering iron

15: Soldering iron recess

20: Groove

21: Thin wall part

25: Core wire

26: Core wire coating material

27: External covering material

30: Wire storage space

35: Temperature measurement and fixing part

35a: Fixed contact surface

36: Groove

Claims (6)

A heating nozzle unit is a unit in which a temperature sensor is mounted on a plate-shaped heating nozzle for hot-pressing a terminal wire to a terminal member, wherein the heating nozzle comprises: a soldering part having a soldering iron front end abutting against the terminal wire on a soldering iron body; a pair of connecting arms extending upward from left and right ends of the soldering iron body and separating from each other, and allowing a current from a power source to flow through the soldering iron body to heat the soldering part; and a temperature measuring fixing part. , which is arranged on the aforementioned soldering iron part and is used for fixing the temperature measuring part of the aforementioned temperature sensor; the aforementioned temperature measuring fixing part is provided with a pair of fixing contact surfaces for point contact with the aforementioned temperature measuring part, and is set to a state where the distance between the aforementioned fixing contact surfaces gradually expands from the side of the aforementioned soldering iron part to the upper part; the gap between the aforementioned connecting arm parts is used as a wire storage space to store the wire of the aforementioned temperature sensor in the aforementioned wire storage space; and the aforementioned fixing contact surface is opposite to the end of the aforementioned wire storage space. In the heating nozzle unit as described in claim 1, the aforementioned fixing contact surface is formed as a plane, and the aforementioned temperature measuring part is formed as a sphere. A heating nozzle unit as described in claim 1 or 2, wherein the heating nozzle has an oxidation-resistant coating layer formed on at least the surface of the soldering part and the temperature measuring fixing part. The heating nozzle unit as described in claim 3 is formed with an oxidation-resistant coating layer on the surface of the temperature measuring portion before being fixed to the temperature measuring fixing portion. The heating nozzle unit as described in claim 3, wherein the oxidation-resistant coating layer is a nickel coating. The heating nozzle unit as described in claim 4, wherein the oxidation-resistant coating layer is a nickel coating.

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