Multi-step punch forming method capable of reducing part defects

Abstract

The invention provides a multi-step punch forming method capable of reducing part defects, and relates to the field of punch forming. A first through hole and a second blind hole with different radial sectional areas are formed to communicate with each other, a stepped hole cavity is formed, and a first gasket is placed at the bottom of the second blind hole; a material is put into the cavity, a first punch cooperates with the first through hole to punch the material, and the material deforms and is attached to the top face of the first gasket; the material is taken out, replacement of second gaskets is carried out, a second punch punches the material and stretches into the second blind hole, the material deforms and is attached to the top faces of the second gaskets, replacement of the second gaskets with different thicknesses is carried out, and the punching process is repeated; the second gaskets are removed, the second punch punches the material and stretches into the second blind hole, and the material deforms and is attached to the bottom face of the blind hole; and micro-parts are subjected to multi-step machining, a gasket bearing step-by-step punching manner is adopted in the machining process of the blind holes with a long stamping path, the wrinkle defect caused by single-feature one-time forming is overcome, and the influence of irregular metal flowing on the surfaces of the micro-parts is reduced.

Description

technical field [0001] The disclosure relates to the field of stamping and forming, and in particular to a multi-step stamping and forming method for reducing parts defects. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] With the development trend of global product miniaturization and miniaturization, medium-scale non-axisymmetric parts (medium-scale parts refer to two parts with a size in the range of 1 to 10 mm) are widely used in electronic products, household appliances, automobiles and other fields . In the forming process of metal parts, due to the irregular flow of metal, there are often wrinkle defects in medium-sized parts, and usually because the feature size of parts is relatively small, these defects are not easy to be found, and often cause sudden failure of the machine, resulting in Severe personal injury and property da...

AI Technical Summary

Problems solved by technology

[0005] The purpose of this disclosure is to aim at the defects existing in the prior art, to provide a multi-step stamping forming method and micro-parts that reduce the defects of parts, to perform multi-step processing on micro-parts, and to process blind holes with long stamping paths. The gasket is used to undertake step-by-step stamping, which overcomes the wrinkle defect caused by one-time molding of a single feature, reduces the influence of irregular metal flow on the surface of micro-parts, and ensures the processing accuracy of micro-parts through multi-step stamping.

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