JPH0448850B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for heat treating metal plate-shaped parts such as stator plates.

[Prior Art] To heat-treat a metal plate-shaped component, such as a stator plate, the outer shape is pressed out from a metal plate having soft magnetism, and in order to increase processing efficiency, a large number of sheets are stacked and placed in a furnace for heat treatment. conduct. However, during the heat treatment, the components of the heat-treated materials may diffuse into each other, or compounds such as carbides may precipitate on the surface, resulting in the materials being bonded to each other. Therefore, when they are taken out of the furnace, they must be manually separated into pieces, which requires a great deal of effort and time.

Therefore, in the past, a large number of magnetic metal plates were laminated in a support device so as to be movable in the thickness direction, and then the support device was placed in a magnetic field to magnetize both ends of each metal plate with the same polarity. The repulsive force is activated to align the metal materials at intervals. (For example, Japanese Patent Application Laid-open No. 57-117439.) Furthermore, the magnetic metal plates arranged at intervals in this manner are held by a substrate on which a plurality of partition plates are provided in parallel, and the entire substrate is placed in a furnace. It was inserted and heat treated (Utility Model Application No. 57-129769).

[Problems to be Solved] However, the above-mentioned conventional technology requires many devices such as a support device for aligning the magnetic metal plates, a magnetic flux generator, and a substrate for holding the magnetic metal plates, and the work is complicated. Therefore, there is a drawback that the cost required for heat treatment increases.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for heat treatment of plate-shaped parts, which can prevent metal plates from being joined by heat treatment without requiring a special excitation device or complicated work as described above.

[Means for Solving the Problems] A feature of the present invention is that a plate-like part is formed by punching out the outer shape from a metal plate material, and a plurality of protrusions are provided scattered in the thickness direction on the surface of this plate-like part. , a large number of these plate-like parts are laminated. The plate-like parts are stacked one on top of the other with a gap between them due to projections, and are then placed in a furnace for heat treatment.

[Example] The present invention will be described with reference to an example in which the present invention is applied to heat treatment of a stator plate of a motor.

As shown in Figures 1 and 2, the stator plate 1, which is a plate-shaped component, has a U-shaped outer shape and is formed by pressing out a metal plate 2 having soft magnetic properties such as permalloy. It is. At the time of pressing out the outer shape, a plurality of projections 3 (four in the drawing) are formed in a scattered manner on the surface of the stator plate 1 in the thickness direction by half-pressing at the same time. At the same time, holes 4 for attachment are formed by punching.
A large number of the stator plates 1 formed in this manner are stacked as shown in the third figure, and the legs thereof are held astride the support member 5.

In this laminated state, due to the presence of the protrusions 3, the opposing surfaces of adjacent stator plates 1 do not come into contact with each other, and a state with a gap 6 is maintained. Therefore, a large number of stacked stator plates 1 are placed in a furnace while being held by the support member 5 and annealed. An example of annealing conditions is an inert gas atmosphere such as argon gas,
After being kept at ℃ for 2 hours, it is slowly cooled.

When taken out from the furnace, the stator plates 1 are annealed with a gap 6 between them due to the protrusions 3, so that the stator plates 1 are not joined to each other. Therefore, the heat treatment is completed in each stator plate 1 individually without having to separate them by hand. Therefore, it can be immediately transported to the next process, for example, a motor assembly process, while being supported by the support member 5.

Note that the present invention is not limited to heat treatment of magnetic plate-like members such as stator plates, but can be applied to heat treatment of transformer yokes and various other plate-like parts.
Regarding the material, for example, it can be applied to stainless steel material or aluminum material.

[Effects] As described above, according to the present invention, it is possible to prevent metal plate-shaped parts from being joined to each other by heat treatment, without requiring special equipment unlike in the past.
Since it can be sent to the next process as it is when taken out of the furnace, manpower can be greatly saved and the cost required for heat treatment can be significantly reduced.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the present invention, in which Fig. 1 is a plan view of a stator plate, which is an example of a plate-shaped component, Fig. 2 is a sectional view taken along the line of Fig. 1, and Fig. 3 is a diagram showing a laminated state. FIG. 1...Plate-shaped part, 2...Metal plate material, 3...Protrusion, 6...Between.

Claims (1)

[Claims] 1 Form a plate-shaped part by pressing out the outer shape from a metal plate material, provide a plurality of protrusions in the thickness direction on the surface of the plate-shaped part, and stack a large number of the plate-shaped parts to form the protrusions. A method for heat treating plate-shaped parts, characterized by heat-treating them by placing them in a furnace with a gap between them.