JPS6126359Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is aimed at improving salt quenching equipment used for quenching precision steel parts such as tools and precision machine parts. This invention relates to a salt quenching device that can recover salt.

In general, salt quenching has the advantages of being able to stably obtain a wide range of processing temperatures because the properties and melting point of the inorganic salts used and not corroding the steel surface are used to quench precision steel parts. It is commonly used in

By the way, for example, when quenching gears, etc., a large number of gears are stacked and quenched, so the viscosity of the salt is high, and when the workpieces immersed in the quenching bath are pulled up after quenching, they may be mixed together. The amount of salt taken out was considerable, and since this type of salt is expensive, there was a problem of considerable waste.

Therefore, in order to recover the salt that is taken out, the object to be treated is pulled out of the quenching bath, and then the tray on which the object is placed is tilted, and the salt adhering to the object and the tray is flushed into the quenching bath. It is possible to drop it. In this method, for example, an inclined pedestal is installed on the side of the elevator, and the workpieces and the tray on which they are placed are transferred from the quenching bath by the elevator and placed on the slanted pedestal. There is a method of tilting the objects to be processed and washing off the salt adhering to them, or similarly, transferring the tray and the objects to be processed onto a pedestal placed on the side of the elevator, and then moving the pedestal itself or onto the pedestal. It is possible to wash off the salt adhering to these by tilting the tray. Alternatively, it is also conceivable to raise and tilt the tray support section of the elevator to wash off and collect the salt.

Among the above methods, how to tilt the elevator〓〓〓〓〓
The problem with this method is that it has little mechanical freedom and its structure is complex. Therefore, it is preferable to use a method that utilizes tilting of the tray on the pedestal, but in these methods, salt adheres to the pedestal, accumulates, and solidifies during repeated tilting of the tray on the pedestal, resulting in reduced efficiency. There is a problem in that it becomes impossible to recover good salt, and the accumulated and solidified salt must be removed mechanically with a hammer or the like.

In view of this problem, the present invention is a device that collects the salt by tilting the tray and the workpiece on the cradle and dropping it into the quenching bath. It is an object of the present invention to provide a salt quenching device that can prevent salt from accumulating on a table.

In order to achieve this purpose, the present invention involves removing the workpiece from the pedestal, and then immersing the pedestal in a quenching bath containing a salt solution to melt the salt attached to the pedestal in the salt solution. It is characterized in that it is collected by In other words, in the present invention, a pedestal is placed on the side of the elevator in which the workpiece is immersed in a quenching bath for quenching, and the salt attached to the workpiece is removed by tilting the workpiece on the pedestal. is dropped into the quenching bath and the object to be treated is carried out from the pedestal, then the pedestal is lowered into the quenching bath, the salt adhering to the pedestal during immersion is melted and recovered in the salt solution, and then pulled up. The present invention is characterized in that it is provided with a mechanism for lifting and lowering a pedestal that is placed on standby for the next object to be processed.

Since the salt is recovered by immersing the pedestal in the quenching bath in this way, salt does not accumulate on the pedestal, and salt can always be recovered efficiently. In addition, since the pedestal can be moved up and down, there is no need to provide a special tilting mechanism for tilting the pedestal. Since the pedestal can also be tilted by providing a tiltable fixing claw, the overall structure of the device can be simplified.

Further, by immersing the pedestal in the quenching bath, the salt can be melted using the temperature of the quenching bath, so there is an advantage that a special heat source for heating the pedestal is not required.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic side view showing the entire salt quenching apparatus of the present invention.

From the step before quenching, the workpiece 1 is placed on the tray 2, transported on the rail 3A, and transferred together with the tray 2 onto the support table 4a of the elevator 4. The tray 2 and the workpiece 1 are immersed in a salt solution 5a in a quenching bath 5 by an elevator 4, and then lifted up.

The workpiece 1 is a steel workpiece, such as a gear, which requires hardening treatment, and is placed, for example, by being fitted into a large number of supports set up on a tray 2 .

The elevator 4, for example, supports a support platform 4a suspended by a chain 4b.
Since this is a well-known device for raising and lowering the vehicle by means of a screwdriver, illustration of its drive mechanism and the like is omitted.

At the elevated position of the support platform 4a of the elevator 4, a pushing member 6 for carrying out is provided so as to be movable back and forth (left and right in FIG. 1) guided by a rail 7. While descending into the interior, it moves to the left in FIG. 1, and when the support stand 4a rises, it is located on the left side of the support stand 4a, so that it can push the workpiece 1 to the right. . That is, when the workpiece 1 is transferred from the previous process to the elevator 4, the pushing member 6 moves to the right of the elevator 4, and while the workpiece 1 is descending into the quenching bath 5. move to the left and move the elevated workpiece 1 onto the rail 3.
Push it to the right along line B and transfer it onto the tray holder 8.

As shown in FIG. 2, the tray pedestal 8 is made up of, for example, three support arms 8a and a frame 8b that cantilevers support the support arms 8a.
It is fixed to and guided to move up and down along the guide rail 10. The pedestal support column 9 is moved up and down via a piston rod 11 by an elevating drive means 12 such as a cylinder. As the elevating drive means 12, a hydraulic cylinder or a rack and pinion mechanism is used.

A tilting member 13 having a tilting fixing claw 13a is fixed at the same height as the pedestal 8, and this claw 13a abuts one end of the tray 2 on the pedestal from below (3rd A).
), when the pedestal 8 is slightly (predetermined amount) lowered, one end of the tray 8 is supported in the fixed position, and the tray 8 is
゜It is tilted and attached to the workpiece 1 on the tray〓〓〓〓〓
(Figure 3B). At this time,
The lower end 6a of the pushing member 6 comes into contact with the rear end (the left end in FIG. 1) of the tray 2, and serves as a stopper for the tray 2, so that the tray 2 is tilted. At this time, the tray 2 is slightly lowered together with the pedestal 8, and the pushing member 6 comes into contact with a portion of the tray 2 at the lowered position.

Next, the pedestal 8 is raised to the same height as the tilting claw 13a of the tilting member 13 (FIG. 3C), the tray 2 and the workpiece 1 are further moved to the right by the pushing member 6, and the next It is transferred onto a rail 3C for transport to the cleaning step of the process (Fig. 3D).

After the tray 2 and the workpiece 1 are carried out from the pedestal 8 in this way, the pedestal 8 is lowered again along the guide rail 10 by the lifting drive means 12 of the lifting mechanism, and the holder 8 is lowered again into the quenching bath 5. It is immersed in salt solution 5a (FIG. 3E).

Since the salt solution melts at about 140°C, the salt solution 5a in the quenching bath 5 is kept at 230°C for quenching, so when the pedestal 8 is immersed in it, it will stick to the pedestal 8. The salt is melted and becomes salt solution 5.
It is collected within a. Thereafter, the pedestal 8 is lifted out of the salt solution 5a in the quenching bath and returned to the same height as the fixed claw 13a (FIG. 3F).

In the present invention, as described above, the tray is tilted on the pedestal to wash off the salt solution adhering to the workpiece, and then the pedestal is immersed in the salt solution of the quenching bath to remove the salt that adheres to the pedestal. Since the solidified salt is melted and recovered, the salt does not gradually accumulate and adhere to the pedestal, allowing efficient salt recovery at all times.

In addition, since the pedestal is frequently immersed in high-temperature salt solution, there is no need to provide a separate means for heating the pedestal, and the device only needs to have an extremely simple mechanism for raising and lowering the pedestal. The practical feasibility is high.

In addition, in the above embodiment, in order to tilt the tray on the pedestal, a method was shown in which a fixed claw was used to lower the pedestal and support the end of the tray, but this method of tilting the tray is limited to this method. Of course, for example, a tilting mechanism using a power cylinder for tilting the tray on the pedestal may be used. Alternatively, the tray may be moved onto a pedestal that is inclined as described above using a pushing member, and the tray may be automatically tilted when it is moved.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing an embodiment of the salt quenching apparatus of the present invention, Fig. 2 is a plan view showing the cradle portion thereof, and Figs. 3A to 3F are partial side views showing the operation of the cradle. It is. 1... Workpiece, 2... Tray, 3A, 3B,
3C...Rail, 4...Elevator, 5...Quenching bath, 5a...Salt liquid, 6...Pushing member, 7...
Rail, 8... Tray cradle, 9... cradle support, 1
0...Guide rail, 11...Piston rod,
12...Elevating drive mechanism, 13...Tilt member, 13
a... Fixed claw for tilting. 〓〓〓〓〓

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An elevator that lifts up the workpiece from the quenching bath after immersing it in a quenching bath and quenching it, and an elevator that is located on the side of this elevator and above the quenching bath and is transferred from the elevator. a pedestal for supporting the workpiece after quenching; a means for tilting the workpiece on the pedestal; a carry-out mechanism for carrying out the tilted workpiece from the stand; 1. A salt quenching apparatus comprising: a lifting mechanism for raising and lowering a pedestal after immersing it in a quenching bath. 2. The means for tilting the object to be processed is a tilting mechanism that tilts the object by lowering the pedestal by a predetermined amount after the object is transferred onto the pedestal. A salt quenching apparatus according to claim 1 of the utility model registration claim. 3. The elevating mechanism includes a guide rail that extends vertically from above to the inside of the quenching bath on the side of the elevator, and moves the pedestal along the guide rail up and down between the top and inside of the quenching bath. A salt quenching apparatus according to any one of claims 1 to 2, characterized in that it comprises a driving means for moving.