JP2001113369A - Digital communication welding equipment - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] A welding device having a remote control device for performing welding work in a place isolated from a welding device main body. A welding power supply for supplying a welding current to a torch, a gas source for supplying a welding shielding gas to the torch,
A main body 100 that supplies a welding current and a shielding gas to the torch according to the input, a remote control device 200 that supplies a welding current and the shielding gas to the torch according to the input,
A digital communication type welding device comprising four or more control lines 300 for connecting between a main body and a remote control device, wherein the main body and the remote control device mutually transmit and receive the respective inputs by digital signals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a welding device,
More particularly, the present invention relates to a welding device having a remote control device for performing a welding operation at a location separated from a welding device main body.

[0002]

2. Description of the Related Art Conventionally, in a welding apparatus using an engine-driven welding generator, it is often necessary to perform welding work at a place somewhat distant from the place where the welding apparatus body is placed. For example, when looking at a construction site, it often happens that the welding device body is on the ground and the welding location is on the upper floor.

In such a case, a welding operation is performed by using a welding torch connected to a welding apparatus body by a cable and a shielding gas tube for welding. In order to change the welding conditions when the welding target changes, the welding conditions are switched and changed by operating the welding apparatus main body on the ground.

[0004]

Since such switching and changing operations are very complicated, there is a demand for a remote control system capable of switching and changing the welding conditions of the welding device body from a remote control device.

[0005] Here, in the conventional welding device, while the control circuit is configured using an analog circuit, various signals for determining welding conditions are required. It is necessary to connect the welding device body and the remote control device using a multi-core cable that can provide a line for a welding power source, a circuit power source, and a signal line.

[0006] However, only such multi-core cables having a thickness and a weight that are not suitable for routing at all exist. Therefore, conventionally, there has not been provided a welding device capable of switching and changing welding conditions in consideration of all information desired by a customer on a remote control device side.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a minimum number of cables for connecting a welding device main body and a remote control device, and a remote control device which can be connected to the welding device main body with a cable suitable for routing. It is an object of the present invention to provide a welding device having:

[0008]

In order to achieve the above object, according to the present invention, a gas atmosphere is formed by injecting a welding shielding gas from a welding torch to a welding area, and an arc is formed between the electrode and the base material in this atmosphere. In a welding apparatus for generating and welding, a welding power supply for supplying a welding current to the torch, a gas source for supplying a welding shield gas to the torch, a welding current from the welding power supply, and the gas source A welding shield gas is supplied from the main body, a welding current and a gas are supplied to the torch according to the input, a welding current and a gas are supplied from the main body, and the welding current and the gas are supplied to the torch according to the input. A remote control device that supplies gas, a line that supplies circuit power from the main body to the remote control device, and data and data between the main body and the remote control device. A digital signal line for transmitting and receiving a digital signal of a bell signal; and four or more control lines connecting between the main body and the remote control device. A digital communication type welding apparatus characterized in that the above-mentioned respective inputs and outputs are mutually exchanged.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view conceptually showing an overall configuration of a TIG (hereinafter referred to as TIG) welding apparatus as one embodiment of the present invention. As shown in FIG. 1, the welding apparatus according to the present invention rectifies electric power supplied from a welding generator G driven by an engine E by an operation panel, that is, a main body 100 to form a DC welding power supply, On the other hand, T
In the case of IG welding, together with an inert gas such as argon which is a welding shielding gas supplied from a gas cylinder,
It is configured to supply to the remote control device 200.

That is, the main body 100 has a gas inlet in contact with a gas cylinder, a gas outlet with a solenoid S-type valve for supplying gas to the torch for the main body, and a gas supply with a valve to the remote controller 200. A gas outlet is provided, and a base material terminal and a torch terminal as welding terminals are provided. These gas outlets and terminals are connected to the remote control device 200 or the welding target.

Remote control device 200 has a built-in high frequency generating circuit connected to a TIG input terminal, a base material terminal, and a TIG output terminal. The TIG input terminal is a torch terminal of main body 100, and the base material terminal is a base material. , And a TIG output terminal is connected to the torch. On the other hand, a gas outlet with a valve to which gas is supplied from the main body 100 is connected to a torch, and supplies a welding current while forming a gas atmosphere in a welding area. The torch is provided with a torch switch connected to the control unit.

In FIG. 1, since the emphasis is placed on the description of the configuration of the remote control device 200 and the relationship between the remote control device 200 and the main body 100, the main body 100 is not shown including the welding torch. , The control section, etc. are also shown only in relation to the remote controller 200.

The remote controller 200 is connected to the main body 100 by a four-core cable 300. The cable 300 has one common line as a common line, one DC power supply plus line as a circuit power supply of the remote control device 200, and one direction for transmitting and receiving digital signals between the remote control device 200 and the main body 100. A total of four lines are provided, including two lines.

The internal configuration of remote control device 200 is as follows. First, three types of DC power are formed from the DC power supplied by the common line and the DC power plus line, and are provided to the control unit. Further, by combining a common line and two one-way digital signal lines with a low-pass filter, data and level signals are distinguished to form four signal paths, and four types of signals are formed from these signal paths. I try to take it out. The filters can be further combined with others.

Further, remote control device 200 is provided with an engine stop switch, and a changeover switch for an emergency circuit and for stopping high frequency generation.

FIG. 2 shows the shapes of the upper and lower operation sections of the operation panel of the main body 100. The configuration of the operation panel of the main body 100 itself is not directly related to the content of the present invention, but the whole panel will be briefly described in order to explain a portion related to a remote control device 200 described later.

The upper part of the operation unit in FIG. 2 is a gas indicator lamp 101, a gas check switch 102, a remote changeover switch 103, a welding mode changeover switch 118, a welding ammeter 104, and a fuel gauge 11 from upper left to right.
9, a hydraulic warning light 105, a water temperature warning light 106, a charging warning light 107, a preheating warning light 108, a rotation control switch 109,
It is an integrating time meter 117, and a fuse for a high-frequency power supply, a temperature alarm light, a circuit breaker 110, a starter switch 11
6 is provided, and 50H is provided above the circuit breaker 110.
A z, 60 Hz operation indicator light is provided. And
In the lower part, from the left, a gas afterflow time adjuster 111, an initial current adjuster 112, and a crater mode selection switch 11
3. Crater current regulators 114 are arranged, a main current regulator 115 is provided at the center, and an outlet is provided to the right of the main current regulator 115.

The main ones among these board elements will be described. The remote changeover switch 103 selects between operation on the remote control device side and operation on the main body side. TIG welding operation is performed on the remote control side, or TIG welding or manual operation is performed by selecting the welding mode changeover switch 118 on the main body side. Welding operation is selected. A gas afterflow time adjuster 11 which is a setting element
1. The initial current regulator 112, the crater mode selection switch 113, and the crater current regulator 114 include a gas afterflow time regulator 111, an initial current regulator 11
2. The crater current regulator 114 is a dial type setting, and the crater mode selection switch 113 is a changeover switch type setting.

The lower part of the operation unit is T above from the left.
IG welding output terminal 121, remote TIG welding outlet 127 for both gas / welding output, analog remote outlet 122, torch switch outlet 123
, A gas inlet coupler 124, a gas outlet coupler 125, and a remote connection outlet 128 are provided on the lower side, and a hand welding output terminal 126 is provided on the right side thereof.

FIGS. 3A and 3B show the front and back shapes of the remote controller 200. FIG. This remote control device 200 performs a part of the functions of the main body 100 and is a central part of the present invention.

On the front shown in FIG. 3A, a power supply display LED and a remote control display LED are provided from the upper left.
, A crater mode selection display lamp and a crater mode selection switch 202 in a crater control section thereunder, and a main current switch 203 provided with a display LED in a welding current / flow time adjustment section at the center right. , Crater current switch 204, initial current switch 205, gas afterflow switch 206, and temperature abnormalities (temperature abnormalities of the generator control circuit) arranged vertically four above, gas shortage alarm, torch switch and welding output Each indicator light is provided, and a seven-segment LED is provided below the indicator light, and an up switch 207 and a down switch 208 are provided to the right thereof.

A fuel gauge 209 and a push button type engine stop switch 210 are provided on the right side. A torch switch connector 2 is provided on the lower side of the panel.
11. Connector 2 for both TIG output terminal and gas outlet
12, a high-frequency ground terminal 213 at the right end, and a high-frequency indicator lamp 21 lit thereon at the same timing as high-frequency generation
7 are provided.

Further, an indicator using seven LEDs may be provided to indicate the remaining fuel amount in the fuel tank on the main body 100 side. This is a vertical arrangement of 7 LEDs. The top 5 are for green lighting, the bottom 2 are for green and red selective lighting. When 4 lights are turned off, the 5th and 6th lights turn green and the 7th lights red, and further decreases and when the 5th light turns off, the 6th and 7th lights turn red. Things are conceivable.

On the back side shown in FIG. 3 (b), a cooling fan is provided at the upper center, a TIG input terminal and a connector 214 serving also as a gas inlet are provided at the upper right, and an emergency for switching the main body control and high frequency off is provided at the lower part. A switch 215, a power supply, and a 4-core connector 216 for communication are provided.

The emergency switch 215 is used for “normal” for use when the operation of the remote controller 200 is normal,
The "main body control" allows the welding operation to be performed by the setting of the main body 100 when abnormal, and the high frequency generation is switched to "high frequency OFF" at the time of maintenance or the like.

FIGS. 4 to 9 are flowcharts for explaining the operation of the TIG welding device of the main body 100 and the remote controller 200. 4 to 6 show the operation of the main body 100, and FIGS. 7 and 9 show the operation of the remote controller 200.

Referring now to FIG. 4 and FIG.
Is turned on, initialization is performed in step S101, and each circuit element inside the main body 100 is set to an initial state. Then, it is determined whether the remote switch 103 of the main body 100 is in the remote state. On the surface of the main body 100 shown in FIG.
Reference numeral 3 designates a three-stage switching of a digital remote / main unit / analog remote. However, in FIGS. 4 and 5, the analog remote is omitted, and the digital remote is described as "remote" and described as "remote / main unit". I have.

If it is determined in step S102 that the remote controller is remote, the process proceeds to step S103, where the gas valve for the main body 100 is closed and the gas valve for the remote controller 200 is opened (in this case, the gas valve of the remote controller 200 is in a closed state). Is.). Thereby, the main body 10
The gas is supplied to the remote control device 200 via “0”.
Next, in step S104, the data of the remaining amount of “fuel” and the “remote” state display are transmitted as digital signals from the main body 100 to the remote control device 200 via the cable 300.

After the transmission, the main body 100 requests the remote controller 200 to transmit data in step S105. In remote control device 200, as described with reference to FIG. 3, some settings are made in the crater control section and the welding current / flow time adjustment section, and the contents are transmitted as digital signal data via cable 300. Transmitted to the main body 100.

When the main body 100 receives the data (S10
6) In the main body 100, various setting operations and data saving operations are performed based on the received data (S107).
Subsequently, in step S108, remote control device 200
It is checked whether or not the emergency switch 215 provided on the back of is turned off. If it is off, it is determined in step S109 whether the torch switch is on. If it is on, the process proceeds to step S110. Move on to welding operation.

That is, in step S110, high-frequency output is generated in remote control device 200 so that an arc is easily generated from the torch. Then, it is determined whether or not the welding current has flowed due to the arc (S11).
1). If an arc has occurred, the process proceeds to the welding output in step S112, and the welding operation is performed. If not, the process returns to step S110 to perform high-frequency output until an arc is generated. When the welding operation is completed, in step S113, it is confirmed that the various settings are completed, and the gas valve on the remote control device 200 side is closed to stop the supply of the welding shield gas, that is, the inert gas. This is the case where remote control device 200 is operating normally.

On the other hand, if remote controller 200 is abnormal, the result of determination in step S106 is that data has not been received from remote controller 200 or not in step S10.
If it is determined in step 8 that the emergency switch 215 is not off, the process proceeds to step S121 to close the gas valve provided at the gas outlet of the main body 100 (in this case, the gas valve of the remote control device 200 is open). And
In step S122, it is checked whether or not the torch switch is on. If it is on, the gas valve is opened (S12).
3) In step S124, a high-frequency output is generated in the remote control device 200 so that an arc is easily generated from the torch.

Then, it is determined whether or not a welding current has flowed due to the arc (S125). If an arc is generated, the process proceeds to the welding output in step S126, and the welding operation is performed. If not, step S12
4 and high-frequency output is performed until an arc is generated. When the welding operation is completed, the completion of the operation of various settings is confirmed in step S127, and the supply of the welding shield gas, that is, the inert gas is stopped by closing the gas valve. Then, returning to step S102, it is determined whether or not the remote switch 103 is set to remote.

If the torch switch is not turned on in step S122, the main body 100 is deactivated in step S128.
The various setting values on the side are read. Then, step S1
Returning to 02, it is determined whether or not the remote switch 103 is set to remote.

Next, a case where the remote changeover switch 103 is switched to the main body side instead of the remote side will be described. In this case, the process proceeds to step S131, where the gas valve for the remote control device 200 and the gas valve for the main body are closed, and the welding shielding gas, that is, the inert gas is not supplied to the torch at all. Next, step S132
The various setting values on the main body side are read until the torch switch is turned on (S133).
The gas valve is opened by 134 to supply gas for welding on the main body side (in this case, the torch is connected on the main body 100 side).

In steps S135 and S136, high-frequency output is performed until an arc is generated and a welding current flows. When an arc is generated, welding output is performed in step S137. Thereafter, when the welding operation is completed, the gas valve is closed and the gas supply is stopped after the various setting operations are completed in step S138.
2, the switching state of the remote switch 103 is determined.

FIG. 6 is a flowchart showing in more detail the operation contents in the "welding output" shown in steps S112, S126 and S137 in the flowcharts of FIGS. 4 and 5. The welding output performs different operations depending on whether the crater control mode is “crater”, “crater”, or “repetition”.

If it is determined in step S141 that the crater is in the "absence" mode, the flow shifts to step S142 to output only the main current, and this output is maintained as long as the arc continues (S143). Done.

In step S144, if the crater is in the "present" mode, the initial current, the main current, and the crater current are output (S145), and based on the output data, as long as the arc continues (S146). ),
A welding operation is performed.

If neither mode is the above mode, the mode is the "repetition" mode. In step S147, the repetitive operation of the initial current, the main current, the crater current, and the main current is performed as long as the arc continues (S148).
Here, each time the crater mode switch is pressed, the setting of the crater “absent”, the crater “present”, and the “repetition” operation is changed.

FIGS. 7 and 8 are flowcharts showing the contents of the operation on the remote controller 200 side. When the power is turned on, initialization is performed in step S201.
The process proceeds to the determination of whether or not the emergency switch 215 is off in step S202. If it is off, a normal operation is performed, and the process shifts to step S203 and the remote control device 2
The gas valve on the 00 side is closed to stop the gas supply from the remote control device 200 to the torch. And step S
In response to a data request from the main unit 100 in step 204, data is transmitted in step S205.

Here, the initial current, the main current, the crater current and the gas afterflow time, which are the welding currents, and the data before the crater mode selection position have already been stored. At the time of the initial setting, the stored data is transmitted. You. If there is no data request from the main body 100, the process goes to step S206, bypassing step S205.

In step S206, it is determined whether or not the torch switch is on.
a, the torch switch LED is turned on, and step S
In step S208, the gas valve is opened in step S208.
The subsequent welding operation is started. That is, a high frequency output command is issued from the main body 100 to the remote control device 200 (S208), and a high frequency is output (S209).

Then, it is determined in step S210 whether or not a welding current meaning arc generation has flowed, and high-frequency output is performed until the welding current flows. When the welding current flows, the LED of the welding current is turned on in step S210a. To shift to the welding output (S211). Also, the main body 10
After the high frequency output command and the welding output command are output from 0, the LED of the welding current can be turned on. The operation during this time is performed in steps S110 to S1 in FIG.
Corresponding to 12.

When the welding output operation is performed, it is monitored whether a signal to close the gas valve has been sent from the main body 100 (S212). When the signal has been sent, the gas valve is closed (S213), and the process returns to step S202 and waits. State.

If there is a change in the settings of the initial current, the main current, the crater current, and the gas after-flow time, the flow shifts from step S241 to step S242.
Various settings (S242), data saving (S243), and numerical display of the designated item (S244) are performed, and the process returns to step S202.

If the torch switch is not on in step S206, the process proceeds to step S214a to determine whether or not the crater mode selection switch is on. If it is on, then in the next step S214b,
The process proceeds to the determination as to whether or not the current crater mode is “absent”.

If it is not "absent", the process proceeds to the next step S214c to determine whether or not the current crater mode is "present". If it is not "Yes",
Assuming that the current crater mode is "repeated", the crater mode is changed to "absent" in step S214d. Then, in step S214g, the indicator light (LED) indicating that the crater is “absent” is turned on, and the process proceeds to the various settings in step S215.

On the other hand, if it is determined in step S214b that the current crater mode is "absent", the process proceeds to step S2.
The process shifts to 14f, where the crater mode is changed to “present”, the LED of the crater “present” is turned on in step S214i, and the process proceeds to the next various settings in step S215.

If it is determined in step S214c that the current crater mode is "present", step S2c is executed.
Go to 14e and change the crater mode to "Repeat",
The LED of the crater “repeat” is turned on.

If the crater mode selection switch is not turned on in step S214a, or the LED of the torch switch is turned on (S206a).
Then, the process directly proceeds to step S215, and various settings can be changed.

When the crater mode selection switch is pressed as appropriate, "Yes", "Repeat", "No",
The mode change is repeated cyclically with “Yes”,….

In this way, various settings (S215),
The data is saved (S216) and the numerical value of the designated item is displayed (S217), and the process returns to step S202 to be in a standby state.

On the other hand, in step S202, the emergency switch 2
If the switch 15 is on, the process proceeds to step S218, where the gas valve is opened, and the main body 100 is brought into a state of performing a welding operation as an emergency measure by opening and closing the gas valve.

FIG. 9 shows the operation contents of various settings in remote control device 200. These settings are
This is performed using the welding current / flow time adjustment section of the board shown in FIG. 3A, and there are four items: an initial current, a main current, a crater current, and a gas after-flow time.

For example, the initial current is specified in step S221.
To determine whether or not the initial current switch is on. If the switch is on, the LED indicator of that switch is turned on to display the current item designation location, and the initial current item is designated in step S222, and steps S229 to S233 are performed. Move on to the numerical value setting operation.

That is, when the up switch (207 in FIG. 3) in FIG. 3 is pressed (S229), step S2 is performed.
30 and becomes "+1". On the contrary, the down switch (FIGS. 3 and 2)
08) is pressed (S231), it becomes "-1" in step S232. Therefore, the value can be set by selectively pressing the up switch or the down switch appropriately or repeatedly. Although not described in this flowchart, the 7-segment LED in FIG. 3 is also changed and displayed according to the change.

Similarly, numerical values can be set for other main currents, crater currents, and gas afterflows by item (S223-S224, S225-S).
226 and S227-S228 and S229-S233
In combination with).

FIG. 10 is a timing chart showing how the welding current is supplied to the crater mode selection switch shown in FIG. 6 in relation to the on / off operation of the torch switch. That is, in the crater “no” mode, the main current as the welding current flows only during the period when the torch switch is on. In the crater "presence" mode, the initial current flows when the torch switch is turned on, the main current flows when the torch switch is turned off, the crater current flows when the torch switch is turned on again, and the energization ends when the torch switch is turned off again.

Further, in the "repeated" mode, an initial current flows when the torch switch is first turned on, a main current flows when the torch switch is turned off, a crater current flows when the torch switch is turned on again, and a main current flows when the torch switch is turned off again. When turned on, the crater current flows repeatedly,
Finally, the energization is completed by lifting the torch from the base material and turning off the arc.

FIGS. 11 and 12 show four lines connecting the main body 100 and the remote controller 200 and circuit elements used for the lines. FIG. 11 shows the main body 100 side and FIG. Reference numeral 12 denotes the remote controller 200 side.

The circuit elements are C1, C2, C
3, C4 (C4-1 to C4-3), each of which will be described including the photocoupler, the torch switch, the inverter and the circuit power supply.

The circuit element C1 is a noise filter,
Absorption of noise such as high-frequency high voltage generated from a high-frequency generator or electromagnetic waves generated during welding to prevent intrusion into a control circuit line as much as possible and at the same time protect a photocoupler or a control circuit. If high-frequency high-voltage or electromagnetic waves do not get on the line, it can be omitted.

The circuit element C2 is a coupling capacitor for converting a pulse signal of data from the transmission side into an alternating current. The circuit element C3 is a low-pass filter, and a pulse signal having a small pulse width (here, a pulse width of less than 45 ms) is absorbed by a built-in coil and a capacitor. Without
Only continuous level signals (here 45 ms or longer) are passed. Therefore, the high frequency generation command signal passes.

The circuit element C4 is a high-pass filter for discriminating between an AC component as a data pulse signal and a level signal and noise. Accept. Among the circuit elements C4, the circuit element C4
A coupling capacitor -1 passes a pulse component which is a data signal of an AC component in the superimposed signal. Also,
The circuit element C4-2 is a noise filter that transmits a pulse signal by removing a high frequency from an AC component as a pulse signal as data. Further, the circuit element C4-3 is a level discriminating circuit that discriminates the threshold value of the signal level voltage between the signal level and the noise level, and transmits the signal level when the signal level is not transmitted.

The photocoupler insulates a digital signal line from a signal line for transmission and reception to and from a control unit of the main body 100 and the remote controller 200, and a circuit power supply between the digital signal line and the signal line to the control unit. Can be different power supply voltages.

Therefore, the circuit voltage of the digital signal line can be increased by distinguishing the circuit voltage from the signal lines of both control sections, and the digital signal can be more accurately and reliably output even if the voltage drop due to the line resistance occurs. Can send and receive. Also, by insulating through a photocoupler,
The noise on the digital signal line (extension cable) can be better cut, and both control sections can be protected from noise caused by high voltage by preventing noise from entering both control sections.

The insulating circuit using the photocoupler can be omitted when external noise and noise such as high-frequency high voltage and electromagnetic waves from inside the device do not enter the signal line, or when the digital signal line is short.

The torch switch is a switch for generating a high frequency, is insulated by a photocoupler via a circuit element C1 so as to prevent a high frequency high voltage, an electromagnetic wave or the like from entering a control section and a digital signal line of the remote control device 200, and a control circuit is provided. Protected. Since the inverter has a noise margin, the digital signal is distinguished from the noise by the noise margin while inverting the signal and the like.

The circuit power supply is connected to the main body 100 on the main body 100 side.
A battery is used as an input of the switching power supply circuit on the side, and the
+18 of the DC power supply plus line as the 00 side power supply
V, circuit power supply for the digital signal line on the main body 100 side +
It is composed of 12 V, data transmission / reception on the main body 100 side, and a circuit power supply of a microcomputer or the like +5 V. The + 18V and + 12V 0-level voltage lines are connected to each other as common lines, and are insulated from + 5V to be connected to the remote control device 2.
Sent to 00 side.

On the other hand, on the remote control device 200 side, the DC power supply plus line transmitted from the main body 100 side as an input of the switching power supply circuit of the remote control device 200 side.
18V and the common line are used as the output of this switching power supply circuit, and the circuit power supply for the digital signal line on the remote control device 200 side and the +12 for the power supply such as the LED and the relay are used.
V, a circuit power supply for data transmission / reception and a microcomputer, etc., +5 V for a power supply for LEDs and various setting switches, and +18 V for a circuit power supply for a torch switch and a power supply for a gas valve are configured to be output as they are.
The 12V 0-level voltage line is connected and used as a common line, and is insulated from the + 5V line.

In the embodiment shown in FIGS. 11 and 12,
Although a battery is used as the input of the switching power supply on the main body 100 side, an AC power supply can be used. The output voltages of the switching power supply including the remote control device 200 use + 18V, + 12V, and + 5V.
This voltage is appropriately selected according to the circuit power supply voltage.

The operation of the circuits shown in FIGS. 11 and 12 is as follows. When only the pulse signal as data is transmitted from the transmission side, the pulse signal of the data transmitted from the control section on the transmission side is extracted by converting the pulse signal into alternating current by the circuit element C2, and the common signal is transmitted to the digital signal line. Sent to the railway.

Then, the data of the AC component sent by the digital signal line is taken into the circuit element C4 on the receiving side (C4-1). Noise is removed from the AC component taken in by the circuit element C4-2, and the circuit element C4-2.
3 discriminates between the pulse signal level and the noise level of the AC component data, and only the data pulse signal is sent to the control unit on the receiving side.

When only the level signal due to switching or the like is transmitted from the transmitting side, the level signal transmitted from the control unit on the transmitting side and the external torch switch is converted from the level signal by the circuit element C1 to a high-frequency high voltage or electromagnetic wave. After the components are removed, one is sent to the control section, and the other is sent again to the digital signal line and the common line after the component such as high-frequency high voltage or electromagnetic wave is removed again by the circuit element C1.

The level signal sent to the digital signal line and the common line is converted into a circuit element C on the receiving side.
3 From the received level signal, only a signal having a small pulse width or a continuous level signal from the noise-removed control unit on the receiving side is captured by a coil and a capacitor.

When a pulse signal as data and a level signal for switching or the like are transmitted from the transmission side, the pulse signal and the level signal of the data transmitted from the control section on the transmission side are the AC components of the above-described pulse signal. And a level signal are sent to a digital signal line as a signal in which the signal is superimposed. The AC data and the level signal sent by the digital signal line are separated into a pulse signal and a level signal on the receiving side as described above, and are separated into the two signals, and the control unit on the receiving side. Is taken as a data pulse signal and the other is taken as a level signal.

(Modification) In the above embodiment, TIG welding was described, but a carbon dioxide welding apparatus, a MIG (MIG)
The present invention can be applied to a welding device or a semi-automatic welding device, and can be transmitted by superimposing a level signal for switching or the like on a data signal for various settings by a remote controller.
Although a four-core cable is used to make the cable as light and simple as possible, the number of power supply lines and signal lines can be increased according to circumstances.

[0079]

As described above, according to the present invention, the welding device body and the remote controller are connected by four or more control lines including a common line, a power supply plus line, and a digital signal line. Remote control that could not be realized with the conventional analog system, easy transmission of much information between the main unit and the remote control device, and easy to handle because the main unit and the remote control device are connected with a cable suitable for sufficient routing A type welding device can be provided.

[Brief description of the drawings]

FIG. 1 is an explanatory view conceptually showing the overall configuration of an embodiment of the present invention.

FIG. 2 is an external view showing upper and lower parts of an operation unit of a main body 100.

FIGS. 3A and 3B show a remote control device 2;
The figure which showed the external appearance shape of the front and back of 00.

FIG. 4 is a flowchart showing a part of the operation of the main body 100.

FIG. 5 is a flowchart showing the remaining part of the operation of the main body 100 shown in FIG. 4;

FIG. 6 shows steps S112 and S in the flowchart of FIG.
26 is a flowchart showing the details of the operation in “welding output” shown in steps S126 and S137.

FIG. 7 is a flowchart showing an operation content on the remote control device 200 side.

FIG. 8 is a flowchart showing an additional portion in the case of adding to the operation content on the remote control device 200 shown in FIG. 7;

FIG. 9 is a flowchart showing operation contents of various settings in the remote control device 200.

FIG. 10 is a timing chart showing the state of energization in the crater mode selection switch in relation to the on / off operation of the torch switch.

FIG. 11 is a circuit diagram showing a connection relationship between the main body 100 and the remote control device 200 in one embodiment of the present invention in detail on the main body side.

FIG. 12 is a circuit diagram showing the connection relationship between the main body 100 and the remote control device 200 in one embodiment of the present invention in detail on the remote control side.

[Explanation of symbols]

 Reference Signs List 100 body 101 gas indicator lamp 102 switch 103 remote switch 104 ammeter 105 hydraulic warning lamp 106 water temperature warning lamp 107 charging warning lamp 108 preheating warning lamp 109 rotation control switch 111 gas afterflow regulator 112 initial current regulator 113 crater mode selection Switch 114 Crater current adjuster 115 Main current adjuster 116 Starter switch 117 Integral time meter 121 TIG welding terminal 122 Remote outlet (for analog) 123 Torch switch outlet 124 Gas inlet 125 Gas outlet 126 Hand welding terminal 127 Remote TIG welding outlet 128 Remote connection outlet 200 Remote control device 201 Indicator light 202 Selection push button switch 203 Main current switch 204 Crater current Switch 205 Initial current switch 206 Gas after flow switch 207 Up switch 208 Down switch 209 Fuel gauge 210 Engine stop switch 211 Torch switch connector 212 TIG output terminal and gas outlet 213 High frequency ground terminal 214 TIG input terminal and gas inlet 215 Emergency switch 216 Power supply , 4-core connector for communication 217 High-frequency indicator light 300 Control line

Continuing from the front page (72) Inventor Kenji Katsuki 5th Oike, Kosai-cho, Koka-gun, Shiga Prefecture Inside the Shiga Factory (72) Inventor Osamu Suzuki 2-8-8 Yoshinodai, Kawagoe-shi, Saitama 65 Den-Yo Corporation In-house Engineering Department (72) Inventor Akinobu Mizutani 2-8-8 Yoshinodai, Kawagoe-shi, Saitama 65-year-old In-house Engineering Department (72) Inventor ▲ Taka ▼ Bashi Katsura 2-11-11 Aoyagi, Ichihara-shi, Chiba Share Company Sanko Rental Lease F-term (reference) 4E001 AA03 BB06 DD09 NB01 NB05 QA10 4E082 EA04 EF07 EF21

Claims (10)

[Claims] 1. A welding apparatus for injecting a welding shielding gas from a welding torch to a welding area to form a gas atmosphere, and generating an arc between an electrode and a base material in the atmosphere to perform welding, wherein: A welding power supply for supplying a welding current, a gas source for supplying a shielding gas for welding to the torch, a welding current from the power supply for welding, and a shielding gas for welding from the gas source are supplied. A main body that supplies a welding current and a gas to the torch, a remote control device that receives the supply of the welding current and the gas from the main body, and supplies the welding current and the gas to the torch according to an input; A line for supplying circuit power to the remote control device, and a digital signal of data and a level signal between the main body and the remote control device. And four or more control lines connecting the main body and the remote control device, wherein the main body and the remote control device mutually transmit and receive the respective inputs by digital signals. A digital communication type welding device characterized by the above-mentioned. 2. The digital communication welding apparatus according to claim 1, wherein said main body can select a welding operation by said main body side and a welding operation by said remote controller side, and at the same time, said remote controller side also requires welding operation. Digital communication type welding equipment that can select various settings and modes. 3. The welding apparatus according to claim 1, wherein the four or more control lines include one common line, one DC power supply line, and two digital signal one-way transmission lines. Digital communication type welding equipment including. 4. The digital communication welding apparatus according to claim 3, wherein said one-way transmission line for digital signals insulates said main body side and said remote control device side from each other via a photocoupler and a low-pass filter. A digital communication type welding apparatus having a function of transmitting a level signal through a high-pass filter. 5. The digital communication type welding apparatus according to claim 3, wherein the one-way transmission line for digital signals transmits a plurality of data and level signals by superimposing them on the common line. A digital communication welding apparatus, wherein the main body and the remote controller separately receive a digital signal transmitted through the digital signal transmission line. 6. The digital communication type welding apparatus according to claim 1, wherein the remote controller transmits a digital signal relating to setting of respective values of an initial current, a main current, a crater current, a gas after-flow time, and selection of a crater control mode. A digital communication type welding device having a function of transmitting to the main body. 7. The digital communication welding apparatus according to claim 1, wherein the remote control device can change settings of an initial current, a main current, a crater current, and a gas after-flow time even under a load and no load. The crater control mode can be changed even when there is no load, and the change in the crater control mode can be performed after one round of welding work is completed, so that a digital signal having a function of transmitting a digital signal for performing these operations to the main body is provided. Communication type welding equipment. 8. The digital communication welding apparatus according to claim 1, wherein said remote controller has an emergency switching circuit for performing welding in accordance with the setting contents of said main body. 9. The digital communication welding apparatus according to claim 1, wherein the remote controller is for setting an initial current, a main current, a crater current, a gas afterflow time before a welding operation is stopped, and selecting a crater control mode. A digital communication welding device that stores information and has a function to automatically set the conditions before operation stop when restarting. 10. The digital communication welding apparatus according to claim 1, wherein the main body transmits to the remote controller a digital signal relating to at least one of an abnormal alarm and information corresponding to a remaining fuel amount in a fuel tank. Digital communication type welding equipment having the function of performing.