WO2022259584A1

WO2022259584A1 - Quenching device

Info

Publication number: WO2022259584A1
Application number: PCT/JP2021/048745
Authority: WO
Inventors: 彰尾崎; 修大下
Original assignee: 中外炉工業株式会社
Priority date: 2021-06-09
Filing date: 2021-12-28
Publication date: 2022-12-15
Also published as: CN117460848A; JP2022188361A; JP7055923B1; TW202248426A

Abstract

This quenching device comprises: a rotating base 36 that, upon soaking a workpiece holding member H that holds a heated workpiece W in a cooling liquid X accommodated in a cooling liquid tank provided below a quenching chamber 11 using a lifting device 20 and then quenching the workpiece holding member, holds the workpiece holding member soaked in the cooling liquid by the lifting device; a rotating arm 34 to which the rotating base is rotatably attached; a rotating mechanism that causes the rotating arm to rotate such that the workpiece holding member held on the rotating base revolves along a circumferential trajectory within the cooling liquid tank; and an autorotation mechanism that causes the rotating base rotatably attached to the rotating arm to undergo autorotation.

Description

Quenching equipment

In the present invention, a workpiece heated in a heat treatment furnace is held by a workpiece holding member, the workpiece holding member is immersed in a cooling liquid contained in a cooling liquid tank provided at the bottom of a quenching chamber, and the work holding member is The present invention relates to a quenching device for cooling and quenching a held work. In particular, when quenching the workpieces held by the workpiece holding member as described above, the workpieces are uniformly cooled in the cooling liquid so that they can be quenched, and a plurality of workpieces are held by the workpiece holding member and quenched. , is also characterized in that each workpiece can be uniformly cooled in the coolant.

Conventionally, a work piece heated in a heat treatment furnace is immersed in a cooling liquid contained in a cooling liquid bath provided at the bottom of the quenching chamber to cool and harden the work piece.

In quenching the heated workpiece by immersing it in a cooling liquid contained in a cooling liquid tank provided at the bottom of the quenching chamber, conventionally, the heat-treated workpiece is placed in the quenching chamber. The workpiece is placed on a supporting member provided, the supporting member is lowered by an elevating means, and the workpiece placed on the supporting member is stored in a cooling liquid tank provided at the bottom of the quenching chamber. The workpiece is immersed in the liquid and quenched by circulating the coolant in the coolant tank to cool the workpiece.

Here, in cooling the workpiece by circulating the cooling liquid in the cooling liquid tank, it is preferable to increase the cooling speed of the workpiece and reduce the distortion of the cooled workpiece.

In cooling the workpiece by circulating the cooling liquid in the cooling liquid tank as described above, if the speed of circulation of the cooling liquid is increased in order to quickly cool the heated workpiece, the flow rate of the cooling liquid increases. There is a problem that the workpiece tends to be unevenly cooled, and that only one side of the workpiece, which is in contact with the flow direction of the coolant, is rapidly cooled, resulting in an increase in strain generated in the workpiece.

Conventionally, a work holding member holding a heated work is immersed in the cooling liquid contained in the cooling liquid tank, and the work holding member is placed on the peripheral wall of the cooling liquid tank in the cooling liquid in the cooling liquid tank. The work is cooled by revolving on a circulating orbit along which the work held by the work holding member is brought into contact with the cooling liquid for a longer distance.

However, when the work holding member is caused to revolve in the cooling liquid on the circular orbit along the peripheral wall of the cooling liquid tank as described above, and the work held by the work holding member is brought into contact with the cooling liquid, the circular orbit The speed on the outer peripheral side becomes faster than the speed on the inner peripheral side of the work holding member, and the outer peripheral side of the work held by the work holding member is cooled faster than the inner peripheral side. Only the front side of the work is cooled quickly, and the cooling of the work becomes non-uniform, causing problems such as distortion of the work.

Conventionally, as shown in Patent Document 1, a plurality of workpiece holders for individually holding workpieces in a fixed posture are arranged at a predetermined pitch on a circular orbit along a horizontal plane, and heated workpieces are heated. is moved downward by an elevating mechanism in the work loading area, and each work held by each work holder is immersed in the cooling liquid stored in the cooling liquid tank, and each work The holders are circulated (revolved) along the orbit by the movement mechanism, and the workpieces held by each workpiece holder are cooled by being brought into contact with the cooling liquid stored in the cooling liquid tank, and the workpieces are cooled. There has been proposed a work holder in which the work holder is moved upward by an elevating mechanism in a work pick-up area and taken out.

Further, in Patent Document 1, it is disclosed that, when cooling the workpieces held by the workpiece holders, the quenching oil is individually injected from the injection member to the workpieces held by the respective workpiece holders. there is

However, in the device described in Patent Document 1, there is a lifting device for individually lifting and lowering each work holder holding a work, and a quenching oil is individually injected from an injection member to the work held by each work holder. As a result, a large number of devices are required, the control of each device is very complicated, and the cost is high. , it was difficult to efficiently cool a plurality of workpieces.

Furthermore, in Patent Document 2, when the heated workpiece is immersed in the quenching oil injected into the quenching chamber to cool the workpiece, the workpiece immersed in the quenching oil is lifted into the quenching oil by a workpiece lifting device. It is shown to be moved up and down for cooling.

However, as shown in Patent Document 2, when a workpiece immersed in quenching oil is vertically moved in the quenching oil, the vertical movement distance is limited and the vertical movement speed is also limited. When the motion is switched, the work is momentarily stopped between the rising end and the falling end, making it difficult to quickly cool the heated work.

Japanese Patent No. 5616728 Japanese Patent No. 6533146

In the present invention, a workpiece heated in a heat treatment furnace is held by a workpiece holding member, the workpiece holding member is immersed in a cooling liquid contained in a cooling liquid tank provided at the bottom of a quenching chamber, and the work holding member is An object of the present invention is to solve the above-mentioned problems in the case of cooling and quenching the held work.

Then, in the present invention, the workpiece heated as described above is held by the workpiece holding member, and the workpiece holding member is immersed in the cooling liquid contained in the cooling liquid tank provided in the lower part of the quenching chamber, When cooling and quenching the workpiece held by the workpiece holding member, the workpiece held by the workpiece holding member is uniformly cooled and quenched in a coolant, and in particular, a plurality of workpieces are held by the workpiece holding member. It is an object of the present invention to uniformly cool the workpieces in the cooling liquid even when the workpieces are quenched and quenched.

In the quenching apparatus according to the present invention, in order to solve the above problems, the heated work is held by the work holding member, and the cooling liquid contained in the cooling liquid tank provided in the lower part of the quenching chamber in a quenching apparatus for cooling and quenching the work held by the work holding member in a cooling liquid, wherein the work holding member is lifted and lowered in the quenching chamber, and the heated work held by the work holding member A lifting device for immersing the workpiece in the cooling liquid in the cooling liquid tank holding the cooling liquid, and lifting the work immersed in the cooling liquid and cooled from the cooling liquid, and holding the work immersed in the cooling liquid by the lifting device a rotary arm to which the rotary receiver is rotatably attached; and the workpiece holding member held on the rotary receiver by rotating the rotary arm in a cooling liquid tank. A rotating mechanism for revolving along the orbit and a rotating mechanism for rotating the rotating support rotatably attached to the rotating arm are provided.

In the quenching apparatus of the present invention, the work holding member holding the heated work is immersed in the cooling liquid in the cooling liquid tank by the elevating device and held on the rotating pedestal. A rotatably mounted rotating arm is rotated by a rotating mechanism to cause the work holding member held by the rotating pedestal to revolve along the orbit within the coolant tank, and the rotating pedestal is rotated by the rotating mechanism. Let it rotate by With this configuration, the workpiece holding member held by the rotary cradle that revolves along the orbit in the cooling liquid tank by the rotating arm rotated by the rotary mechanism is rotated by the rotary cradle as the rotary cradle rotates. The inner and outer positions of the revolving work holding member change, and each position of the work held by the work holding member comes into contact with the cooling liquid in the cooling liquid tank. Also, since the workpiece rotates, the position of strong contact with the cooling liquid changes continuously, and the workpiece can be cooled more uniformly than the entire circumference. The held work is evenly cooled in the coolant.

Here, in the quenching apparatus according to the present invention, the work holding member can hold a plurality of works. Even when a plurality of workpieces are held by the workpiece holding member in this manner, the rotary cradle revolves along the orbit in the cooling liquid tank by the rotating arm rotated by the rotating mechanism as described above. The held work holding member rotates together with the rotary cradle as the rotary cradle rotates, and the positions of the inner peripheral side and the outer peripheral side of the revolved work holding member change, thereby holding the workpiece. In each of the plurality of workpieces held by the member, the rotating distance in contact with the cooling liquid in the cooling liquid tank is equalized, and since the workpieces rotate, the position of strong contact with the cooling liquid changes continuously. As a result, each workpiece held by the workpiece holding member can be cooled uniformly in the cooling liquid because the single workpiece can be cooled uniformly over the entire circumference.

Further, in the hardening apparatus of the present invention, when rotating the rotation receiving table rotatably attached to the rotation arm as described above, the rotation mechanism includes, for example, a fixed shaft for rotatably holding the rotation arm. and the rotation receiving base rotatably attached to the rotation arm.

As the rotation transmission member, for example, a sprocket is provided on each of the rotation receiving base and the fixed shaft, and a chain is passed between the sprocket provided on the fixed shaft and the sprocket provided on the rotation receiving base. can be provided.

Further, in the quenching apparatus of the present invention, when the workpiece holding member held by the rotary cradle is revolved along the orbit in the cooling liquid tank by the rotating arm, the rotating arm is rotated by the cooling liquid by the rotating mechanism. It can be horizontally rotated within the bath such that the workpiece holding member held on the rotary pedestal revolves along a horizontal orbit within the coolant bath. The rotation mechanism rotates the rotating arm in the vertical direction in the cooling liquid tank so that the workpiece holding member held on the rotary cradle revolves along the vertical circular orbit in the cooling liquid tank. You can also

In the quenching apparatus of the present invention, the work holding member holding the heated work as described above is immersed in the cooling liquid in the cooling liquid tank by the elevating device and held on the rotary cradle. A rotating arm to which a table is rotatably attached is rotated by a rotating mechanism to revolve the workpiece holding member held by the rotating pedestal along the orbit in the cooling liquid tank, and the rotating pedestal is rotated. Since it is rotated by the rotation mechanism, the work holding member held by the rotary cradle revolved along the orbit in the coolant tank by the rotating arm rotated by the rotation mechanism rotates as the rotary cradle rotates. The position of the inner peripheral side and the outer peripheral side of the revolving work holding member are changed, and each position of the work held by this work holding member changes in the cooling liquid tank. The rotating distance in contact with the cooling liquid is made uniform, and the work held by the work holding member is evenly cooled in the cooling liquid.

As a result, in the quenching apparatus of the present invention, the workpieces held by the workpiece holding member can be uniformly cooled in the cooling liquid and quenched. Even in this case, each workpiece can be uniformly cooled in the cooling liquid and quenched.

In the quenching apparatus according to the embodiment of the present invention, a plurality of works heated in the heat treatment furnace are held by the work holding member, and the work holding member is guided to a position facing the extraction chamber in the quenching chamber. It is a cross-sectional explanatory view seen from. In the quenching apparatus according to the above-described embodiment, the work holding member holding a plurality of heated works is guided from the heat treatment furnace into the extraction chamber in the quenching chamber, and placed on the pair of lift receiving parts that are lifted and lowered by the lifting device. FIG. 4 is a cross-sectional explanatory view of a side surface showing a held state; In the quenching apparatus according to the above-described embodiment, the pair of lift receiving parts holding the work holding member is lowered by the lifting device and introduced into the cooling liquid contained in the cooling liquid tank. FIG. 11 is a side cross-sectional explanatory view showing a state in which the held workpiece holding member is held on a rotary cradle provided at the end of a rotating arm that rotates horizontally around the rotary shaft; be. In the quenching apparatus according to the above-described embodiment, the pair of lift receiving parts holding the work holding member is lowered by the lifting device and introduced into the cooling liquid contained in the cooling liquid tank. FIG. 10 is a cross-sectional explanatory view of the front side showing a state in which the held workpiece holding member is held on a rotary cradle provided at the end of a rotary arm that rotates horizontally around the rotary shaft; be. In the quenching apparatus according to the above embodiment, (A) to (D) rotate the rotating arm in the horizontal direction so that the workpiece holding member held on the rotary pedestal is immersed in the coolant in the coolant tank. A state in which the workpiece holding member held on the rotary cradle rotates once in a direction opposite to the revolving direction around the rotary support shaft of the rotary cradle while making one revolution along the orbit in the horizontal direction. is a cross-sectional explanatory view of the above. In the quenching device according to the above embodiment, there are modified examples in which the gear ratio between the sprocket provided on the fixed shaft and the sprocket provided on the rotating shaft portion of the rotary cradle is changed, and (A) to (D) rotates the rotary arm in the horizontal direction so that the work holding member held by the rotary cradle revolves horizontally along the orbit in the cooling liquid of the cooling liquid tank, while the rotary cradle FIG. 10 is a cross-sectional explanatory view showing a state in which the workpiece holding member held on is rotated twice in a direction opposite to the direction of revolution around the rotation support shaft of the rotation support.

A quenching apparatus according to an embodiment of the present invention will be specifically described below with reference to the accompanying drawings. It should be noted that the hardening apparatus according to the present invention is not limited to those shown in the following embodiments, and can be modified appropriately without changing the gist of the invention.

Here, in the quenching apparatus of this embodiment, as shown in FIG. Then, as shown in FIG. 2, the heat treatment furnace 1 is led into the extraction chamber 11 of the quenching chamber 10 by opening the door 1a of the heat treatment furnace 1. The number of works W to be held on the work holding member H is not limited, and even if the number is one, more works W can be held.

Here, in the quenching apparatus of this embodiment, the cooling liquid tank 12 containing the cooling liquid X is provided below the extraction chamber 11 in the quenching chamber 10. As described above, the extraction chamber in the quenching chamber 10 The workpiece holding member H guided by the quenching chamber 11 is held on a pair of lift receiving parts 21 that are lifted and lowered by a lifting device 20 provided in the hardening chamber 10 . The pair of lift receiving portions 21 are provided with a required space therebetween, and each lift receiving portion 21 is composed of a chain conveyor for moving the workpiece holding member H guided through the brewing chamber 11 .

Then, as shown in FIGS. 3 and 4, the pair of lift receiving portions 21 holding the work holding members H holding the plurality of heated works W are lowered by the lifting device 20. Then, the workpiece holding member H holding a plurality of heated workpieces W (Wa to Wd) is immersed in the cooling liquid X contained in the cooling liquid tank 12 .

Here, in the quenching apparatus of this embodiment, a rotating device 31 such as an electric motor is provided above the cooling liquid tank 12, and the rotating shaft 32 rotated by the rotating device 31 is placed in the cooling liquid tank 12. While being immersed in the liquid X, a fixed shaft 33 provided upward from the bottom of the cooling liquid bath 12 is passed through the rotary shaft portion 34a of the rotary arm 34, and the rotary arm 34 is rotated around the fixed shaft 33. I try to keep it as possible.

As a rotating mechanism for rotating the rotating arm 34 in the horizontal direction around the rotating shaft portion 34a, in this embodiment, the rotating shaft 32 rotated by the rotating device 31 and the rotating arm 34

Sprockets

32a and 34b are provided on the rotating shaft portion 34a, respectively, and a chain 35 is stretched between these

sprockets

32a and 34b. , 34b and the chain 35, the rotary arm 34 is horizontally rotated about the rotary shaft portion 34a.

Further, in the quenching apparatus of this embodiment, a support shaft portion 34c projecting upward is provided at the end portion of the rotation arm 34 radially extending from the rotation shaft portion 34a of the rotation arm 34. The rotary shaft portion 36a of the rotary cradle 36 is rotatably held by the portion 34c, and the rotary cradle 36 is rotatably held at the end of the rotary arm 34. As shown in FIG.

As a rotation mechanism for rotating the rotation support 36 about the rotation shaft portion 36a, the end portion of the fixed shaft 33 protruding upward through the rotation shaft portion 34a of the rotation arm 34;

Sprockets

33a and 36b are provided on the rotary shaft portion 36a of the rotary cradle 36, respectively, and a chain 37 is attached to the

sprockets

33a and 36b provided on the end portion of the fixed shaft 33 and the rotary shaft portion 36a of the rotary cradle 36. I am handing it over.

Here, in the quenching apparatus of this embodiment, the workpiece holding member H holding the plurality of heated workpieces W as described above is immersed in the cooling liquid X in the cooling liquid tank 12, and the heated workpieces are When quenching W (Wa to Wd), as shown in FIGS. and immersed in the cooling liquid X contained in the cooling liquid tank 12 , and the work holding member H held on the pair of elevating receiving portions 21 is provided at one end of the rotating arm 34 . , and the lift receiving portion 21 is lowered to a position below the rotating arm 34 to rotate in the horizontal direction about the rotating shaft portion 34a as described above. It is designed not to collide with the rotating arm 34 or the like.

Further, in lowering the pair of lift receiving portions 21 holding the work holding members H as described above and holding the work holding members H held on the lift receiving portions 21 on the rotation support table 36, , the width between the pair of lift receiving portions 21 is made wider than the width of the rotating support table 36, and when the workpiece holding member H is held on the rotating support table 36, the pair of lifting support portions 21 36 so as not to collide.

After the workpiece holding member H is thus held on the rotation receiving base 36 from the pair of lift receiving portions 21, as shown in FIGS. Rotating shaft 32 is rotated by 31, and through a chain 35 that spans a sprocket 32a provided on this rotating shaft 32 and a sprocket 34b provided on a rotating shaft portion 34a of a rotating arm 34, the rotation shaft portion 34a is centered. The rotary arm 34 is rotated in the horizontal direction, and the workpiece holding member H held on the rotary cradle 36 rotatably provided at the end of the rotary arm 34 is accommodated in the coolant tank 12. It is made to revolve in the coolant X along a horizontal circulating orbit.

Further, by rotating the rotating arm 34 in the horizontal direction about the rotating shaft portion 34a, the work holding member H held on the rotating support 36 revolves along the horizontal orbit. In this case, the fixed shaft 33 inserted into the rotating shaft portion 34a of the rotating arm 34 does not rotate. With the rotation of the rotating arm 34, the rotating arm 34 rotates in the direction opposite to the rotating arm 34 due to the chain 37 that is stretched over the sprocket 36b provided on the rotating shaft portion 36a of the rotating arm 36. As it is rotated, the workpiece holding member H held on the rotary cradle 36 rotates around the rotary shaft portion 36a of the rotary cradle 36 in a direction opposite to the direction of revolution.

Here, in this embodiment, the gear ratio between the sprocket 33a provided on the fixed shaft 33 and the sprocket 36b provided on the rotary shaft portion 36a of the rotary support 36 is 1:1. While the arm 34 rotates once in the horizontal direction to cause the workpiece holding member H held on the rotary support 36 to make one revolution along the horizontal orbit, the rotary support 36 rotates the rotating shaft portion 36a. 5(A) to 5(D), the workpiece holding member H held on the rotation receiving base 36 rotates around the rotating shaft portion 36a. The work holding member H rotates about the center in a direction opposite to the direction of revolution, rotates once while changing the position on the inner peripheral side and the position on the outer peripheral side of the work holding member H, and is held by the work holding member H. While rotating in the cooling liquid X, each of the works Wa to Wd is cooled by contacting the cooling liquid X, and the distances cooled are equalized, and each of the works Wa to Wd held by the work holding member H is rotated in the cooling liquid X. will be evenly cooled at

In this embodiment, the gear ratio between the sprocket 33a provided on the fixed shaft 33 and the sprocket 36b provided on the rotary shaft portion 36a of the rotary support 36 is 1:1. By changing the gear ratio between the sprocket 33a and the sprocket 36b provided on the rotary shaft portion 36a of the rotary cradle 36, the workpiece holding member H held on the rotary cradle 36 by the rotary arm 34 rotates. It is possible to change the number of rotations of the workpiece holding member H held on the rotary table 36 during one revolution along the track.

For example, if the gear ratio of the sprocket 33a provided on the fixed shaft 33 is half that of the sprocket 36b provided on the rotary shaft portion 36a of the rotary support 36, as shown in FIGS. By rotating the rotary arm 34, the work holding member H held on the rotary pedestal 36 rotates once along the horizontal orbit. However, it rotates about the rotating shaft portion 36a two times in a direction opposite to the direction of revolution.

In this embodiment, the rotating arm 34 extends only to one side in the radial direction from the rotating shaft portion 34a of the rotating arm 34 through which the fixed shaft 33 is inserted. Although only one cradle 36 is rotatably held, the number of rotating arms 34 extending from the rotating shaft portion 34a is not particularly limited. Although not shown, for example, the rotating arms 34 are extended radially from the rotating shaft portion 34a to both sides, and the rotating cradles 36 are rotatably held at the ends of the rotating arms 34 extending to both sides. It is also possible to rotate the rotating arm 34 in a well-balanced manner, increase the number of workpieces W to be quenched, and improve the production volume.

In addition, although not shown, a rotating device that directly rotates the rotary shaft portion 36a of the rotary cradle 36 without providing a rotation transmission member such as a chain 37 or

sprockets

33a and 36b in order to rotate the rotary cradle 36. (not shown) may be provided on the rotating arm 34 .

Reference Signs List 1: Heat treatment furnace 1a: Door 10: Quenching chamber 11: Extraction chamber 12: Coolant tank 20: Lifting device 21: Lifting receiving part 31: Rotating device 32: Rotating shaft 32a: Sprocket 33: Fixed shaft 33a: Sprocket 34: Rotation Arm 34a : Rotating shaft 34b : Sprocket 34c : Support shaft 35 : Chain 36 : Rotating base 36a : Rotating shaft 36b : Sprocket 37 : Chain H : Work holding member W (Wa to Wd) : Work X : Coolant

Claims

The heated workpiece is held by the workpiece holding member and immersed in the cooling liquid contained in the cooling liquid bath provided at the bottom of the quenching chamber, and the workpiece held by the workpiece holding member is cooled in the cooling liquid. In the quenching apparatus for quenching the work holding member, the work holding member is moved up and down in the quenching chamber, and the heated work held by the work holding member is immersed in the cooling liquid in the cooling liquid tank holding the work holding member. An elevating device for lifting the immersed and cooled work out of the cooling liquid, a rotary cradle for holding the workpiece holding member immersed in the cooling liquid by the elevating device, and the rotary cradle is rotatably mounted. a rotation mechanism that rotates the rotation arm to rotate the workpiece holding member held on the rotation cradle along the orbit in the cooling liquid bath; and a rotation mechanism for rotating the rotation cradle.
The quenching apparatus for a workpiece according to claim 1, wherein a plurality of workpieces are held by the workpiece holding member.
3. In the workpiece quenching treatment apparatus according to claim 1, the rotating mechanism for rotating the rotating support rotatably attached to the rotating arm includes a fixed shaft for rotatably holding the rotating arm. 1. A quenching apparatus, characterized in that a rotation transmitting member is provided between said rotating support rotatably attached to said rotating arm.
4. The work hardening apparatus according to claim 3, wherein sprockets are provided on the fixed shaft and the rotary cradle as the rotation transmission member, and the sprockets provided on the fixed shaft and the rotary cradle are provided with sprockets. A quenching device characterized in that it is provided so as to span a chain over a sprocket.
In the work hardening treatment apparatus according to any one of claims 1 to 4, the rotating arm is horizontally rotated in the cooling liquid tank by the rotating mechanism and held on the rotating pedestal. A quenching apparatus characterized by revolving a workpiece holding member along a horizontal orbit in a cooling liquid bath.