Riveted assembly of metal plate-like body and column-like body, and manufacturing method and device thereof

Abstract

The invention provides a metal tabular body and columnar body riveting assembling product and a method and a device for manufacturing the same. The invention provides a processing technology which cancombine a metal tabular body and a tubular body without deep-drawing deep processing; the combination has sufficient bonding strength and the assembling precision is high; many materials can be selected; high-quality and high-reliability products free of dislocation of shaft cores can be made with low cost. The outer periphery portion of the metal tabular body is provided with a bending sheet; the inner peripheral surface of the tubular body is provided with a recess with a specific depth; the metal tabular sheet is inserted in the assembling position where the bending sheet and the recess are oppositely arranged; a stop part which is pressed against the inner peripheral surface of the bending sheet to prevent deformation of the bending sheet towards the inner peripheral side is located on the inner peripheral surface side of the bending sheet in the tubular body and compresses and pressurizes the bending sheet in the axial direction so that the bending sheet deforms plastically towards the inner peripheral surface side serving as the outer peripheral surface side of the bending sheet to intrude into the opposite recess.

Description

technical field [0001] The present invention relates to a high-strength joint technology capable of firmly fixing a metal plate-shaped body inside a pipe body, and particularly relates to a cylindrical casing suitable as a bearing of an electric motor and a rotor (core) constituting the inside of the electric motor. A riveting assembly for cylindrical frames that rotate together with the rotating shaft, various bearings other than motors, or cylindrical frames of rotating bodies. Background technique [0002] Conventionally, such cylindrical frames have been processed by deep drawing. As in Patent Documents 1 and 2, it has also been proposed to configure the plate body at the end of the bearing and the cylindrical body at the outer peripheral portion from separate members and integrally join them together to assemble them. However, there is a limit to the joint strength and there are problems in reliability. A cylindrical frame integrally formed by deep drawing has high str...

AI Technical Summary

Problems solved by technology

[0003] However, the cylindrical frame obtained by deep drawing is gradually processed into a deep shape using a plurality of dies (such as a transfer die), which usually requires expensive equipment and increases manufacturing costs.

In particular, in the case of a motor whose length in the axial direction is longer than the diameter, it is more difficult to process with high precision, and there is a problem that the manufacturing cost further increases.

In addition, deep drawing processing is performed while plastically deforming (stretching) the entire outer peripheral part, so it is difficult to deform the wall thickness of the outer peripheral part uniformly, and it is impossible to avoid displacement of the axial core due to springback.

[0004] Therefore, especially in the case of rotating parts such as the frame used for the rotor, it is also necessary to adjust the shape and the rotation balance by post-processing, which further increases the manufacturing cost.

In addition, with regard to the selection range of materials, it is also necessary to select materials that can be deep-drawn with relatively high precision. In addition to being restricted in the function as a product, it also becomes a cause of cost increase.

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