Heat treatment method and heat treatment device for angled elastic washer

Abstract

The invention discloses a heat treatment method and a heat treatment device for an angled elastic washer, and the heat treatment device comprises a lower end cover which is provided with a concave surface; the core rod is mounted in the middle of the concave surface; a convex surface is arranged in the middle of the upper end cover; the top of the core rod makes contact with the upper end cover in the middle of the convex face, and the upper end cover is spaced from the lower end cover under the action of the core rod. The heat treatment method comprises the following steps of quenching, low-temperature treatment and tempering. As the convex surface of the elastic washer is matched with the concave surface of the lower end cover, and the concave surface of the elastic washer is matched with the convex surface of the upper end cover, when the upper end cover and the lower end cover are locked by the fixing assembly, the trend that the concave-convex surface is in contact with a plane and pressed to the plane is avoided; the upper end cover and the lower end cover lock the multiple overlapped elastic washers to form a whole, the whole is put into a well type tempering furnace to be heated and tempered together, and the whole is taken out and put into hot water to be cooled after heat preservation is finished, so that the problem that the angle alpha changes and is out of tolerance when the elastic washers make contact with the planes of the upper die plate and the lower die plate to be tempered is solved.

Description

technical field [0001] The invention relates to a heat treatment method and a heat treatment device for an angled elastic washer, belonging to the technical field of heat treatment for an angled elastic washer. Background technique [0002] 60Si2MnA is an alloy spring steel with a wide range of uses. The material has high hardenability, high strength and elastic limit after quenching and tempering, and high yield ratio, relaxation resistance and tempering stability. Therefore, it is one of the materials widely used in the aviation and aerospace industries to make various springs and elastic elements; Figure 1 to Figure 2 As shown, when the elastic washer is required to be made of 60Si2MnA material, it is necessary to use a heat treatment device to clamp and heat treat multiple 60Si2MnA elastic washers at the same time to achieve mass production, and ensure the hardness of 44-48HRC and angle α. [0003] In the Chinese patent publication No. CN104120240B, the processing metho...

AI Technical Summary

Problems solved by technology

[0003] In the Chinese patent publication No. CN104120240B, the processing method of the heat treatment fixture of the thin circular ring and the spring steel thin tooth piece, the disclosed technical scheme is: the thin circular rings are stacked and penetrated into the core according to the convex and concave consistency of the plane deformation direction after quenching In the rod; put it into the upper template, so that the deformed convex and concave thin circular parts are located in the upper template and the lower template for plane contact and compression for tempering; although the thin circular parts can be tempered, but in Overlapping multiple elastic washers with angled materials of 60Si2MnA in this application to contact with the plane of the upper and lower templates, the uneven shape of the 60Si2MnA elastic washers tends to be pressed towards the plane during tempering, especially when it is in contact with the upper and lower templates. The plane of the template is in contact with the elastic washer that is closer, and there is a problem that the angle α of the elastic washer of 60Si2MnA changes out of tolerance during tempering, so that the elasticity generated by the elastic washer of 60Si2MnA in the later use cannot prevent the nuts and bolts from loosening

Images