JP2023174069A - Quenching device - Google Patents

Abstract

To provide a quenching device capable of changing the flow of a quenching agent not only when a product to be treated is immersed in a quenching tank but also continuously after the immersion, as well as capable of saving space in the quenching tank.SOLUTION: A quenching device includes: a quenching tank for storing a quenching agent inside; a holding member for holding an object to be treated; a frame member for hooking and placing the holding member inside; an elevator for controlling movement of the frame member in the vertical direction; and a table installed on the bottom side of the quenching tank. The frame member has a rectifier plate and a bottom opening through which the upper side of the table can pass on the bottom side. The object to be treated is immersed in the quenching tank, and the frame member can be moved up and down by the elevator in a state where the object to be treated is placed on the table via the holding member.SELECTED DRAWING: Figure 1

Description

The present invention relates to a hardening apparatus used for hardening a workpiece made of steel or the like.

When applying heat treatment such as quenching or tempering to steel parts (workpieces) used for automobile parts and various machine parts, many workpieces are immersed in a quenching tank at the same time. Batch processing is performed.
In such cases, variations in quenching between works become a problem.

To address such problems, Patent Document 1 discloses a method in which a large number of workpieces are immersed in a quenching tank, and then the large number of workpieces are moved horizontally within the quenching tank to reduce the cooling variation among the workpieces. Disclose technology to suppress
However, in the cooling method disclosed in Patent Document 1, a large number of objects to be processed are moved as they are, so it is difficult to eliminate the difference in cooling rate between the objects to be processed depending on the positional relationship in which the objects to be processed are installed. .
In addition, a mechanism for moving a large number of objects to be processed requires relatively large power such as a motor, which results in an increase in heat treatment costs.

On the other hand, Patent Documents 2 and 3 disclose techniques for attaching a rectifying plate to change the flow of the quenching agent toward the refrigerant.
However, in Patent Document 2, a rectifying plate is provided on the bottom side of a frame supporting a plurality of workpieces, so although the workpieces are disturbed when entering the quenching tank, the quenching agent is removed after immersion. There will be no flow.
This method is not suitable for hardening processes where the workpiece is large or heavy and requires a long hardening time.
Furthermore, the quenching device disclosed in Patent Document 3 has an excellent straightening effect of the quenching agent in that it has a circulation device with an oil discharge port at the bottom of the quenching tank. The space between the workpiece and the workpiece was wide, and space was needed to install a rectifier plate on the side of the quenching tank.

JP2007-321231A Japanese Patent Application Publication No. 2010-18877 Patent No. 6476535

In order to solve the above technical problems, the present invention is capable of changing the flow of a quenching agent not only when a workpiece is immersed in a quenching tank, but also continuously after immersion, and The purpose of the present invention is to provide a hardening device that can save space inside the machine.

A quenching apparatus according to the present invention includes a quenching tank that stores a quenching agent therein, a holding member that holds a workpiece, a frame member into which the holding member can be hooked and placed, and a case in which the frame member is arranged vertically. and a table installed on the bottom side of the quenching tank, and the frame member has a rectifying plate and a bottom opening on the bottom side through which the upper side of the table can pass. , characterized in that the workpiece is immersed in the quenching tank, and the frame member can be moved up and down by the elevator while the workpiece is placed on the table via the holding member. shall be.
Thereby, the rectifying plate can be moved up and down via the frame member while the object to be processed is immersed in the quenching tank and once placed on the table via the holding member.

In the present invention, a holding member holding a large number of objects to be processed (workpieces) is hooked and placed inside a frame member, and a rectifying plate is provided on this frame member, so that the holding member holds a large number of objects to be processed. Since the frame member can be moved up and down by an elevator even after it is placed on the table, the current plate provided on the frame member can be moved up and down to change the flow of the hardening agent.

Therefore, in the present invention, the ability to hook and place the holding member on the inside of the frame member means that when a large number of workpieces are immersed in a quenching tank, the holding member holds the large number of workpieces on the inside of the frame member. When this frame member is lowered from the top of the quenching tank using an elevator and the holding member is brought into contact with the top of the table, a large number of workpieces can be placed on the table via this holding member. The purpose is to be able to lower and raise the frame member while keeping it in place.
Therefore, in the hook-mounting structure, a holding member holding a large number of workpieces can be supported inside the frame member, and once the holding member is placed on the table in the quenching tank, it can be removed from the frame member. There is no particular restriction as long as the structure allows the holding member to be separated.
For example, the hook portion may have a claw shape, a frame shape, an arm shape, etc. that protrudes toward the inside of the frame member.

Further, in the present invention, the holding member may have various forms as long as it can hold the workpiece, such as a plate shape, a grid shape, a net shape, a frame shape, etc., and the bottom opening provided on the bottom side of the frame member is As long as it can pass from the bottom to the top, it can be designed in various forms depending on the structure of the holding member and the structure of the upper part of the table on which the holding member is placed and supported.
Therefore, the upper part of the table does not necessarily have to be a flat surface, and examples thereof include a plurality of pillar shapes, a lattice shape, a frame shape, etc.

In the present invention, it is preferable that the distance between the object to be treated and the current plate become narrower as it approaches the liquid level of the quenching tank, and the quenching tank directs the quenching agent from the bottom side to the top side. It may also have a pressure feeding pipe for discharging.
If the upper end of the rectifying plate is tilted toward the workpiece, the quenching agent may not be applied when the workpiece is immersed in the quenching tank and when the workpiece is lowered on the table through the frame member. The current can be rectified toward the object to be processed.
The shape of the current plate is not limited, and may be a flat plate, a curved plate, a corrugated plate, or the like.

In the quenching apparatus according to the present invention, since the rectifying plate is provided on the side of the frame member in which the object to be treated is immersed in the quenching tank, it is possible to connect the rectifying plate to the object to be treated rather than providing the rectifying plate on the quenching tank side. Since the gap between the two can be narrowed, the quenching agent can enter the workpiece faster by that amount.
In addition, even when the workpiece is placed on the table, by lowering or raising the frame member using an elevator, the current plate moves up and down, and the quenching agent continues to be applied even after the workpiece is immersed in the quenching tank. Can be rectified.
When the current plate is attached to the frame member, it is easy to replace it or change it depending on the object to be processed.
The elevator is controlled in its raised position, lowered position, and speed.

It is a schematic cross-sectional view of 1 A of hardening apparatuses. It is a schematic sectional view of hardening apparatus 1B. It is a schematic diagram which shows the state of the hardening process using 1 A of hardening apparatuses. It is a schematic diagram which shows the state of the hardening process using 1 A of hardening apparatuses.

Embodiments of a hardening apparatus according to the present invention will be described with reference to the drawings.
A first form (schematic sectional view) of the quenching device is shown in FIG. 1, and a second form (schematic sectional view) is shown in FIG.
The quenching apparatus 1A of the first form includes a quenching tank 3A that stores the quenching agent 2 therein, and an elevator EL1 that immerses and lifts the workpiece W1 into the quenching tank 3A.
As shown in FIG. 1, the tip of the elevator EL1 has a holding member P1 for loading and holding the workpiece W1. It is hooked and placed on section 8A.
Moreover, the upper ends of two rectifying plates 20, 20 are fixed to the inside of the frame member 7A in a state in which they are inclined toward the object to be processed W1.
There is no limit to the number of current plates, and they do not necessarily have to be placed inside the frame member 7A.
At the bottom of the quenching tank 3A, a table 40 is installed on which the holding member P1 on which the workpiece W1 is placed is placed.
The table 40 is provided with a bottom opening 9A having _an inner dimension _d2 larger than an outer dimension d1.
In this embodiment, the holding member P1 is formed into a plate shape, but it is sufficient that the object to be processed W1 can be placed thereon.
Since the bottom opening 9A of the frame member is larger than the table 40, the frame member can be further lowered while leaving the workpiece on the table.

The second type of quenching apparatus 1B includes a quenching tank 3B that stores a quenching agent 2 therein and a workpiece W2 immersed in the quenching tank 3B, similar to the first type of quenching apparatus 1A shown in FIG. It has an elevator EL2 for lifting up and down.
The distal end of the elevator EL2 is provided with a holding member P2 that holds the workpiece W2, similar to the elevator EL1 shown in FIG. 1, and a frame member 7B that accommodates the workpiece W2 inside.
Further, two rectifying plates 21, 21 are fixed to the frame member 7B around the object W2 with the upper ends thereof being inclined toward the object W2.

At the bottom of the quenching tank 3B, a table 41 is installed on which the holding member P2 on which the workpiece W2 is placed is placed.
Furthermore, pressure feeding devices 6B, 6B are provided in the quenching tank 3B to feed the quenching agent 2 by rotating propellers 6A, 6A.
The hardening agent 2 pumped by the pumping devices 6B, 6B flows in from the propeller 6A, 6A side of the pumping pipes 6, 6, and flows out from the upwardly directed openings 5A, 5B via the bent portions 6C, 6C. .
By bringing the hardening agent 2 flowing out from the openings 5A and 5B into contact with the workpiece W2, the cooling rate for the workpiece W2 placed on the table 41 is increased.

Next, the hardening method will be explained using the drawings.
A hardening method using the hardening apparatus 1A shown in FIG. 1 is shown in FIGS. 3 and 4.
First, as shown in FIG. 1, the workpiece W1 is immersed in the quenching agent 2 in the quenching tank 3A.
The workpiece W1 is placed on the holding member P1, and the workpiece W1 is immersed in the hardening agent 2 by lowering the elevator EL1 together with the frame member 7A.
When the workpiece W1 is immersed in the hardening agent 2, the hardening agent 2 also flows into the gap between the workpiece W1 and the current plate 20 installed on the frame member 7A.
Since a table 40 is installed at the bottom of the quenching tank 3A, the holding member P1 carrying the workpiece W1 is placed on the table 40.

After that, as shown in FIG. 3, the frame member 7A is further moved below the quenching tank 3A (downward arrow in FIG. 3).
By further lowering the frame member 7A, the current plate 20 also moves downward.
Thereby, the quenching agent 2 in the quenching tank 3A flows upward through the gap between the frame member 7A, the table 40, and the holding member P1 (upward arrow).
Subsequently, the hardening agent 2 flows further upward through the gap between the current plate 20 and the workpiece W1.
That is, by moving the frame member 7A downward with the workpiece W1 placed on the table 40, a flow of the hardening agent 2 is generated around the workpiece W1.
As a result, even after the workpiece W1 is placed on the table 40, the workpiece W1 can be continuously cooled by the quenching agent 2.

After moving the frame member 7A downward, the frame member 7A is then moved upward (upward arrow in FIG. 4).
In this case as well, the object to be processed W1 is kept stationary on the table 40.
By raising the frame member 7A, the current plate 20 also moves upward at the same time. Thereby, the quenching agent 2 in the quenching tank flows downward between the workpiece W1 and the current plate 20.
After that, the quenching agent 2 flows downward between the workpiece W1 and the frame member 7A, and through the gaps between the holding member P1, the table 40, and the frame member 7A.
That is, by moving the frame member 7A upward with the workpiece W1 placed on the table 40, similar to the state shown in FIG. 3, a flow of the hardening agent 2 is generated around the workpiece W1.
As a result, even after the workpiece W1 is placed on the table 40, the workpiece W1 can be continuously cooled by the quenching agent 2.

From the above, even after the workpiece W1 is immersed in the quenching agent 2 of the quenching tank 3A and the holding member P1 is once placed on the table 40, the frame member 7A can be moved up and down inside the quenching agent 2 of the quenching tank 3A. By moving in the direction, it is possible to generate a flow of the hardening agent 2 around the workpiece W1.
Therefore, even after the workpiece W1 is immersed in the quenching tank, continuous cooling (oil hardening) using the quenching agent is possible without moving the workpiece W1.
Since the current plate is moved up and down by an elevator via the frame member, it is possible to attach the current plate to the frame member and attach it removably, and it is also possible to adjust the angle of inclination toward the object to be processed. You can leave it there.
Note that in this embodiment, the term "quenching agent" refers to a refrigerant such as quenching oil or a water-soluble quenching agent.

1A, 1B Quenching device 2 Quenching agent 3A, 3B Quenching tank 5A, 5B Opening 6 Pressure pipe 6A Propeller 7A Frame member 8A Hook 9A Bottom opening 20, 21 Current plate 40, 41 Table EL1, EL2 Elevator P1, P2 Holding member W1, W2 Object to be processed

Claims (3)

A quenching tank that stores a quenching agent therein, a holding member that holds the workpiece, a frame member into which the holding member can be hooked and placed, an elevator that controls the movement of the frame member in the vertical direction; A table installed on the bottom side of the tank,
The frame member has a rectifying plate and a bottom opening on the bottom side through which the upper side of the table can pass,
The workpiece is immersed in the quenching tank, and the frame member can be moved up and down by the elevator while the workpiece is placed on the table via the holding member. Hardening equipment. The quenching apparatus according to claim 1, wherein the distance between the object to be processed and the rectifying plate becomes narrower as it approaches the liquid level of the quenching tank. The quenching apparatus according to claim 1 or 2, wherein the quenching tank has a pressure pipe that discharges the quenching agent from a bottom side toward an upper side.

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