JP4423844B2 - Vacuum furnace - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vacuum furnace .
[0002]
[Prior art and problems to be solved by the invention]
For example, a vacuum furnace that heat-treats a processing object in a heating chamber and cools the processing object by immersing the heat-treated processing object in a cooling oil in a cooling chamber removes the processing object from a carry-in port provided in the cooling chamber. It carries in, the said process target object is transferred to a heating chamber with a charging device (for example, fork), and the heat-processed process target object is transferred to the raising / lowering stand provided in the cooling chamber with the said charging apparatus. And a vacuum furnace raises the said raising / lowering stand, after immersing a process target object in cooling oil and lowering | lowering a raising / lowering stand.
[0003]
However, the above charging device needs to have a mechanism for transferring the processing object carried into the cooling chamber in the vertical and horizontal directions in order to transfer the processing object by lifting the processing object. The problem is that the mechanism is mechanically quite complex.
[0004]
[Patent Document 1]
JP 63-183121 A [Patent Document 2]
Japanese Patent Laid-Open No. 08-060909 [Patent Document 3]
Japanese Patent Laid-Open No. 08-193217 [Patent Document 4]
Japanese Patent Laid-Open No. 08-319512 [Patent Document 5]
Japanese Utility Model Publication No. 03-041837
The present invention has been made in view of the above-described problems, and an object thereof is to simplify a transport mechanism in a vacuum furnace.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, as a first means related to a vacuum furnace, a heating chamber for heat-treating a processing object mounted on a mounting table and a cooling chamber for cooling processing are provided. The processing object sent from the carry-in port provided in the chamber passes through the cooling chamber and is transferred to the heating chamber, and the processing object heated in the heating chamber is transferred to the cooling chamber and immersed in the coolant. A vacuum furnace that cools the workpiece and cools the processing object in the cooling chamber from the carry-in port, and includes a predetermined-shaped engaging portion, and abuts the engaging portion on the mounting table. And conveying means for conveying the object to be processed in the cooling chamber to the heating chamber, and conveying the object to be processed in the heating chamber to the cooling chamber by pulling the engaging portion engaged with the mounting table. The structure of having is adopted.
[0007]
As a second means related to the vacuum furnace, in the first means, the conveying means moves up and down the processing object installed on the lifting table together with the mounting table, and is mounted on the cooling chamber, And a horizontal conveying means for moving the object to be processed in the horizontal direction together with the mounting table by pressing the engaging unit against the mounting table, or pressing the engaging unit with the engaging table. Then, the vertical carrier means sets the lifting platform to a state corresponding to the height of the entrance of the heating chamber, and in this state, the horizontal conveying means makes the engaging portion abut against the mounting table and presses the object to be processed. Transported from above the lifting platform to the heating chamber, with the vertical transport means lowered the lifting platform so that the above-mentioned engaging portion is located below the mounting table, and the engaging portion is inserted under the mounting table by the horizontal transport means And then raise the platform By pulling in a state of being engaged to the mounting base engaging section, a construction is adopted to convey the processed object from the heating chamber on the lifting platform.
[0008]
As a third means related to the vacuum furnace, in the second means, the horizontal conveying means includes a horizontal conveying rod having an engagement portion attached to the tip, and a fixedly arranged outside the carry-in port. A first support member that is slidably supported in the horizontal direction, a second support member that is provided on the lifting platform and slidably supports the horizontal conveying rod in the horizontal direction, and is fixed to the outside of the carry-in entrance. And a horizontal drive unit that moves the horizontal transfer rod in the horizontal direction, and is interposed between the horizontal drive unit and the rear end of the horizontal transfer rod, and moves the horizontal transfer rod up and down relative to the horizontal drive unit. It is composed of a connecting portion that is freely connected, and the engaging portion is brought into contact with the mounting table and pressed to convey the object to be processed from the lifting table to the heating chamber, and the engaging portion is placed under the mounting table. By inserting and pulling the engaging portion engaged with the mounting table, the object to be processed When transporting from the heating chamber onto the lifting platform, the horizontal transport rod is supported by being engaged with the first support member and / or the second support member, and the engaging portion is positioned below the mounting table. Thus, when lowering and when raising the engaging portion to engage the mounting table, a configuration is adopted in which the horizontal conveying rod is engaged with and supported by the second support member.
[0009]
As a fourth means related to the vacuum furnace, in the third means, the horizontal conveying rod includes a roller that engages with the first support member and the second support member, and the connecting portion is a horizontal drive portion. A connecting rod that is connected in a horizontal state, and a projecting portion having an elongated hole that allows the connecting rod to move up and down, and a horizontal drive unit includes a belt member that is connected to both ends of the connecting rod, and a belt A configuration in which a rotating body that rotates and conveys the member is employed is adopted.
[0010]
As a fifth means related to the vacuum furnace, in the third or fourth means, a configuration is adopted in which the belt member is a chain and the rotating body is a sprocket.
[0011]
As a first means related to the transfer method in the vacuum furnace, the object to be processed placed on the mounting table is fed from the carry-in port provided in the cooling chamber, passes through the cooling chamber and is transferred to the heating chamber, and is heated. A processing method in a vacuum furnace in which a processing object heated in a chamber is transported to a cooling chamber and cooled, and the processing object cooled in the cooling chamber is sent out from the carry-in port. The object to be processed in the cooling chamber is conveyed to the heating chamber by pressing the engaging part against the mounting table, and the object to be processed is pulled by engaging the engaging part with the mounting table. The structure which conveys the process target object to a cooling chamber is employ | adopted.
[0012]
As the second means related to the transfer method in the vacuum furnace, in the above first means, the lifting platform installed in the cooling chamber in order to immerse the processing object in the coolant coincides with the height of the inlet of the heating chamber. In this state, the engaging part is brought into contact with the mounting table and pressed to convey the object to be processed from the lifting table to the heating chamber, and the lifting unit is moved from the mounting table by the engaging unit. By inserting the engaging part under the mounting table by the horizontal conveying means in a state of being lowered so as to be positioned below, and further pulling the lifting part up and pulling the engaging part engaged with the mounting table A configuration is adopted in which the object to be treated is transported from the heating chamber onto the lifting platform.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a vacuum furnace and a transfer method in a vacuum furnace according to the present invention will be described with reference to the drawings.
[0014]
FIG. 1 is a longitudinal sectional view of an entire vacuum furnace according to an embodiment of the present invention, and FIG. 2 is a view taken along the line AA ′ in FIG. In these drawings, symbol R is a cooling chamber, K is a heating chamber, S is a storage portion, 1 is a horizontal conveying rod, 2 is an engaging portion, 3 is a first support member, 4 is a connecting portion, and 5 is a horizontal drive. , 6 is a lifting platform, 7 is a second support member, 8 is a vertical drive unit, T is a tray (mounting table), X is a metal material (processing object), Y is cooling oil (coolant), Z is It is an external carrier.
[0015]
Among these components, the horizontal conveying rod 1, the engaging portion 2, the first supporting member 3, the connecting portion 4, the horizontal driving portion 5, the lifting platform 6, the second supporting member 7, and the vertical driving portion 8. Constitutes a conveying means for conveying the metal material X between the cooling chamber R and the heating chamber K. Among the components of such a conveying means, the horizontal conveying rod 1, the engaging portion 2, the first supporting member 3, the connecting portion 4, the horizontal driving portion 5 and the second supporting member 7 are the same in the present embodiment. While constituting the horizontal conveying means, the lifting platform 6 and the vertical drive unit 8 constitute the vertical conveying means in this embodiment.
[0016]
The cooling chamber R is a place where the metal material X is subjected to oil cooling processing, and is configured to have a substantially cylindrical shape with a central axis vertical. A side of the cooling chamber R is connected to a substantially cylindrical heating chamber K having a horizontal central axis. A clutch-type internal door K2 that separates the heating chamber K and the cooling chamber R is provided at the inlet K1 (heating chamber carry-in port) of the heating chamber K. In the cooling chamber R, a cooling chamber inlet R1 is formed at a position substantially opposite to the heating chamber inlet K1. A cooling chamber door R2 is provided at the cooling chamber carry-in port R1, and an external carrier Z is provided outside the cooling chamber door R2. A storage section S for storing the first support member 3 and the horizontal drive section 5 is connected to the cooling chamber R with the connection side set to an open state. In addition, the heating chamber K and the cooling chamber R are provided with an evacuation device (not shown) that exhausts the air to bring it into a reduced pressure state or an inert gas atmosphere state. That is, when the cooling chamber door R2 is in a closed state, the inside of the cooling chamber R, the heating chamber K, and the storage portion S is hermetically sealed, and the inside thereof is in a reduced pressure (vacuum) state and inactive. The atmosphere is kept.
[0017]
The cooling chamber R and the heating chamber K will be further described. An oil tank R3 for storing the cooling oil Y is provided in the lower portion of the cooling chamber R, and the cooling oil Y attached to the surface of the metal material X is inactive on the upper portion. A deoiling part R4 is provided for dropping by blowing gas. Here, the elevating platform 6 and the vertical drive unit 8 constituting the vertical conveying means are for immersing the metal material X in the cooling oil Y in the oil tank R3 or for deoiling the metal material X by the oil removal unit R4. The original function is to vertically move the metal material X placed on the lifting platform 6 while being placed on the tray T. In this embodiment, the lifting platform is described later. The metal material X is conveyed in the cooling chamber R and the heating chamber K by linking the vertical movement of 6 with the horizontal conveying means. The metal material X is always conveyed while being placed on the tray T, and the tray T is formed in a lattice shape, for example. That is, the shape of the tray T is set so that the engaging portion 2 can be engaged.
[0018]
Note that a heating mounting table K3 for storing the metal material X placed on the tray T is provided below the heating chamber K. As shown in FIG. 2, the heating stage K3 has a recess K4 formed on the heating chamber carry-in port K1 side. The concave portion K4 has a size that matches the shape of the engaging portion 2 entering the heating chamber K. The heating mounting table K3 is installed in a horizontal plane that is a predetermined distance lower than the transfer surface of the external transfer table Z.
[0019]
Then, the structure of the said conveyance means is demonstrated.
The first support members 3 are a pair of receiving members formed in a U-shape, and are fixedly arranged in a horizontal state so as to face each other along the inner wall forming the side surface of the storage portion S. The first support member 3 is installed in substantially the same horizontal plane as the heating table K3 in order to horizontally convey the metal material X to the heating table K3.
[0020]
As shown in FIG. 4 which is a BB ′ arrow view in FIG. 3 and FIG. 1 showing the configuration of the horizontal transport rod 1, the engaging portion 2, and the connecting portion 4, the horizontal transport rod 1 has a predetermined length. And is slidably supported by the first support member 3. That is, a plurality of rollers 11 are provided on both sides of the horizontal conveying rod 1, and the horizontal conveying rod 1 is obtained by engaging the plurality of rollers 11 with the U-shaped first support member 3. It is slidably supported in the horizontal direction. Further, an engaging portion 2 protruding upward is provided at the tip of the horizontal conveying rod 1.
[0021]
The connecting portion 4 is inserted between a part of the chain 52 and the rear end of the horizontal conveying rod 1 to connect the horizontal conveying rod 1 to the chain 52 so as to be movable up and down. That is, the connecting portion 4 is inserted in a horizontal state into a protruding portion 41 protruding downward from the rear end of the horizontal conveying rod 1 and a long hole 42 provided along the protruding portion 41, and both ends are connected to the chain 52. The connecting rod 43 is formed.
[0022]
The horizontal drive unit 5 is composed of a sprocket 51 provided at a distance below both ends of the first support member 3, and two endless chains 52 wound around the sprocket 51. ing.
[0023]
The vertical drive unit 8 is installed in the cooling chamber R, and moves the metal material X placed on the lifting platform 6 together with the horizontal conveying rod 1 and the tray T up and down. The lifting platform 6 is provided with a second support member 7 that supports the horizontal conveying rod 1 so as to be slidable in the horizontal direction. The second support member 7 is a pair of U-shaped receiving members having the same shape as the first support member 3. The second support member 7 extends from one end to the other end inside the lifting platform 6, that is, a storage portion. It is installed on a straight line connecting S and the heating chamber K. Further, a recess 61 having the same shape as that of the heating mounting table K3 is provided on one side of the lifting platform 6 on the cooling chamber carry-in port R1 side. Note that a plurality of free rollers are installed at predetermined intervals on the external transfer table Z, the lift table 6 and the heating table K3 in order to facilitate the transfer of the tray T on which the metal material X is mounted.
[0024]
Next, the operation of the thus configured vacuum furnace and the transfer method in the vacuum furnace will be described.
[0025]
As shown in FIG. 1, the metal material X is transported in the direction of the cooling chamber carry-in port R <b> 1 on the external transport table Z while being placed on the tray T. When the metal material X is transported to the vicinity of the cooling chamber carry-in port R1, the cooling chamber door R2 is opened, and the lifting platform 6 is set to the same height as the external transport table Z by the vertical drive unit 8. That is, the metal material X is conveyed on the external conveyance table Z, sent into the cooling chamber C from the cooling chamber carry-in port R <b> 1, and transferred onto the lifting platform 6. When the metal material X is transferred onto the lift 6, the cooling chamber door R <b> 2 is closed, and the lift 6 is lowered by the vertical drive unit 8, so that the heating chamber is loaded as shown in FIG. 5. The state is set to coincide with the height of the mouth K1. In this case, the position of the tip of the horizontal conveying rod 1 is set by the horizontal driving unit 5 so as to enter the vertical driving unit 8 and the recess 61 of the lifting platform 6. That is, when the lifting platform 6 is positioned in a horizontal state with the heating mounting table K3 by the vertical drive unit 8, the metal material X is transported to a state that coincides with the height of the heating chamber carry-in port K1, and the engagement unit 2 is in a state where the tip protrudes on the lifting platform 6.
[0026]
When the metal material X is conveyed in a state that matches the height of the heating chamber carry-in port K1, the internal door K2 is opened. Here, the horizontal conveyance unit conveys the metal material X to the heating chamber K through the heating chamber carry-in port K1 by pressing the engaging portion 2 against the tray T and pressing it. That is, by rotating the sprocket 51 and rotating and conveying the chain 52, the horizontal conveying rod 1 is driven, and the horizontal conveying rod 1 is supported by the first support member 3, thereby It slides along the support member 3. And the horizontal conveyance stick | rod 1 transfers the metal material X on the heating mounting base K3 of the heating chamber K by making the engaging part 2 contact | abut to the tray T and pressing it. Here, the horizontal transport rod 1 is supported only by the first support member 3 immediately after the metal material X is transported from the lifting platform 6, but is gradually supported by the second support member 7 during the transport. At the end of conveyance on the heating stage K3, the second stage is supported only by the second support member 7. That is, the roller 11 engages only with the first support member 3 immediately after the metal material X is transported from the lift 6, but gradually enters the second support member 7 during the transport, and is heated. At the end of conveyance on the table K3, only the second support member 7 is engaged.
[0027]
When the metal material X is transported to the heating chamber K, the horizontal transport rod 1 is retracted to a predetermined position so that the internal door K2 can be closed, and the internal door K2 is closed. Here, the predetermined position at which the horizontal conveying rod 1 moves backward is a position where the roller 11 engages only with the second support member 7. When the metal material X is heat-treated, the lifting platform 6 is lowered by the vertical drive unit 8 so that the engaging unit 2 is positioned below the tray T. That is, since the roller 11 is engaged only with the second support member 7, the horizontal conveying rod 1 moves up and down within a long hole 42 provided in the protruding portion 41 within a range in which the connecting rod 43 can move up and down. As the lifting platform 6 is lowered, the connecting rod 43 moves to the top of the elongated hole 42 as shown by the dotted line in FIG. 3 so that the engaging portion 2 is positioned below the tray T. Position.
[0028]
When the heat treatment for the metal material X is completed, the internal door K2 is opened. The tray T is placed so that one side is exposed on a recessed portion K4 provided on the heating placement table K3, and the horizontal conveying rod 1 causes the engaging portion 2 to be recessed as the horizontal drive portion 5 is driven. Insert under K4, ie under the tray T. Even in this state, since the horizontal conveying rod 1 is supported only by the second support member 7, the engaging portion 2 is lifted by raising the lifting platform 5 to the same position as the height of the heating table K3. 6 engage with one side of the grid-shaped tray T as shown in FIG.
[0029]
The horizontal conveyance unit conveys the metal material X from the heating chamber K onto the lifting platform 6 by pulling the engagement unit 2 in a state where the engagement unit 2 is engaged with the tray T. That is, the metal material X is transferred from the heating mounting table K3 to the lifting table 6 by sliding the horizontal transfer rod 1 by rotating the sprocket 51 in reverse and transporting the chain 52 in reverse rotation. When the metal material X is transferred onto the lifting platform 6, the horizontal transport rod 1 is supported only by the first support member 3, and the position is set so that the tip enters the recess 61. And after raising the raising / lowering stand 6 to the place where the engaging part 2 is located under the tray T by the vertical drive part 8, the horizontal conveyance stick | rod 1 is further moved by reversely rotating the sprocket 51 further. That is, the position of the engaging portion 2 is set so as to be located outside the tray T.
[0030]
When the engaging portion 2 is positioned so as to be located outside the tray T, the metal material X is immersed in the cooling oil Y of the oil tank R3 by the elevator 6 being lowered by the vertical drive portion 8, It is cooled. After completion of the cooling process, the lifting platform 6 is raised by the vertical drive unit 8, whereby the metal material X is conveyed to the deoiling unit R3 and compressed, for example, in an inert gas (when the metal material X is sufficiently cooled). The attached cooling oil Y is dropped by injecting air). When the lifting platform 6 is installed at the same height as the transfer unit Z by the vertical drive unit 8, the cooling chamber door R2 is opened, and the metal material X is placed on the external transfer table Z from the cooling chamber carry-in port R1. Is sent out.
[0031]
In addition, this invention is not limited to the said embodiment, For example, the following modifications can be considered.
(1) In the above embodiment, the heating chamber K is provided on a straight line in the transport direction of the external transport table Z. However, the present invention is not limited to this, and it is only necessary that the heating chamber K be installed on an extended line in the sliding direction of the horizontal conveying rod 1. In this case, since it is not necessary to install the storage unit S below the external conveyance table Z, the heating mounting table K3 is the same as the external conveyance table Z by changing the shape of the long hole 42 formed in the protrusion 41. It may be provided at a height or above the height.
[0032]
(2) In the above embodiment, the horizontal support rod 1 is supported by the first support member 3 and the second support member 7, which are a pair of receiving members formed in a U-shape. The conveying rod 1 was made slidable in the horizontal direction. However, it is only necessary that the horizontal conveying rod 1 is slidable in the horizontal direction. A slide rail is provided as the first supporting member 3 and the second supporting member 7 and the horizontal conveying rod 1 is engaged with the slide rail. good.
[0033]
(3) In the above embodiment, the tray T is formed in a lattice shape. However, it may be any shape as long as the engaging portion 2 can be engaged, and for example, a flange structure may be formed.
[0034]
【The invention's effect】
As described above, according to the present invention, a heating chamber that heats a processing object mounted on a mounting table and a cooling chamber that performs cooling processing are provided. It passes through the cooling chamber provided in the cooling chamber and is transported to the heating chamber. The processing object heated in the heating chamber is transported to the cooling chamber and cooled by being immersed in the coolant, and is cooled in the cooling chamber. A vacuum furnace in which a processed object to be processed is delivered from the carry-in port, and includes a predetermined-shaped engagement portion, and the treatment in the cooling chamber is performed by pressing the engagement portion against a mounting table. Conveying means for conveying the object to be processed to the cooling chamber by conveying the object to the heating chamber and pulling the engaging portion engaged with the mounting table is provided. That is, since the object to be processed can be transported from the cooling chamber to the heating chamber and from the heating chamber to the cooling chamber by the one transporting means, the transport mechanism in the vacuum furnace can be simplified.
[Brief description of the drawings]
FIG. 1 is an overall longitudinal sectional view of a vacuum furnace according to an embodiment of the present invention.
FIG. 2 is an AA ′ arrow view in FIG. 1;
FIG. 3 is a configuration diagram of a horizontal transfer rod 1, an engaging portion 2, and a connecting portion 4 in a vacuum furnace according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view taken along the line BB ′ in FIG.
FIG. 5 is a view for explaining the operation of the vacuum furnace and the transfer method in the vacuum furnace according to the embodiment of the present invention.
FIG. 6 is a view for explaining the operation of the vacuum furnace and the transfer method in the vacuum furnace according to the embodiment of the present invention.
[Explanation of symbols]
1 ... Horizontal conveying rod (conveying means, horizontal conveying means)
11. Roller (conveying means, horizontal conveying means)
2. Engagement part (horizontal conveyance means)
3... First support member (conveying means, horizontal conveying means)
4. Linking part (conveying means, horizontal conveying means)
41 …… Protruding part (conveying means, horizontal conveying means)
42 ...... Long hole (conveying means, horizontal conveying means)
43 …… Connecting rod (conveying means, horizontal conveying means)
5 ... Horizontal drive (conveying means, horizontal conveying means)
51 …… Sprocket (conveying means, horizontal conveying means, rotating body)
52 …… Chain (conveying means, horizontal conveying means, belt member)
6 …… Elevator base (conveying means, vertical conveying means)
61... Concave 7. Second support member (conveying means, horizontal conveying means)
8 …… Vertical drive unit (conveying means, vertical conveying means)
R …… Cooling room R1 …… Cooling room inlet (inlet)
R2 ... Cooling chamber door R3 ... Oil tank R4 ... Deoiling part K ... Heating chamber K1 ... Heating chamber carry-in entrance (heating chamber entrance)
K2: Internal door K3: Heating table K4: Recess S: Storage unit T: Tray (mounting table)
X: Metallic material (object to be treated)
Y: Cooling oil (coolant)
Z: External carrier

Claims (2)

A heating chamber that heat-treats the processing object placed on the mounting table, and a cooling chamber that cools the processing object;
The processing object sent from the carry-in port provided in the cooling chamber passes through the cooling chamber and is conveyed to the heating chamber, and the processing object heated in the heating chamber is conveyed to the cooling chamber and into the coolant. A vacuum furnace that cools by dipping and sends out a processing object cooled in a cooling chamber from the carry-in port,
A horizontal conveying rod that is slidably supported in a horizontal direction in which a cooling chamber and a heating chamber are connected, an engaging portion that is installed at the tip of the horizontal conveying rod and protrudes upward, and the horizontal conveying rod is arranged horizontally. A horizontal drive unit that moves in a direction, a connection unit that connects the horizontal transfer rod to the horizontal drive unit so as to be movable up and down, a lifting table that is provided in the cooling chamber and moves up and down along with the mounting table, A vertical drive unit that moves a processing object placed on the lifting platform up and down by moving the lifting table up and down, and moves a horizontal transport bar up and down by moving the lifting table up and down. ,
The object to be processed in the cooling chamber is conveyed to the heating chamber by bringing the engaging portion into contact with the mounting table and pressed, and the object to be processed in the heating chamber is pulled by engaging the engaging portion with the mounting table. A vacuum furnace characterized in that it is transported to a cooling chamber. A first support member that is fixedly disposed outside the carry-in entrance and that can horizontally support the horizontal transport rods, and is provided on the lifting platform and supports the horizontal transport rods to be slidable in the horizontal direction. A second support member, and when the horizontal transport bar is moved in the horizontal direction by the horizontal drive unit, the horizontal transport bar engages with the first support member and / or the second support member, and the vertical 2. The vacuum furnace according to claim 1, wherein when the horizontal transfer unit is moved in the vertical direction by the driving unit, the horizontal transfer rod is engaged only with the second support member .

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