Progressive die thread extrusion method

Abstract

The invention belongs to the technical field of stamping, and particularly relates to a progressive die thread extrusion method. The method comprises the following steps that first, a target metal plate is selected, the material thickness of the target metal plate is D, an embossing plunger chip is used for carrying out embossing operation so as the target metal plate extends outwards to form a boss, the height of the boss is M1, an embossing hole is formed in the boss, and the hole dimeter of the embossing hole is R1; second, a punching plunger chip is used for carrying out punching operationon the bottom of the boss so as to form a punched hole in the boss, the hole diameter of the punched hole is R2, and R2 is smaller than R1; and third, a thread extrusion plunger chip is used for carrying out thread extrusion operation on the punched hole so as to form a target thread extrusion hole in the boss, the hole of the target thread extrusion hole is R3, R3 is larger than R1, the height of the boss is M2, and M2 is larger than M1. According to the thread extrusion carried out on the target metal plate with the progressive die thread extrusion method, embossing operation is additionally carried out on the basis of a traditional thread extrusion process to form the boss, punching operation is carried out thereafter to reduce the depth of the punched hole, and then the thread extrusion operation is carried out to make the boss downwards extend; and it is achieved that the height of the target thread extrusion hole is one time or twice of the thickness of the target metal plate.

Description

technical field [0001] The invention belongs to the technical field of stamping processing, and in particular relates to a continuous die extraction method. Background technique [0002] During the stamping process of the sheet metal, due to the structural requirements of the actual situation, it is necessary to perform tooth extraction on the sheet metal. Thread extraction refers to punching vertical edges on pre-punched sheet metal, which is a common process in the stamping process. According to the different requirements of the product, it is generally divided into extraction holes, riveting holes and other round holes and other non-round holes. The pros and cons of tooth extraction often affect the assembly performance of the product and have an important impact on product quality. As high-precision products gradually become the mainstream of the market, the precision and shape requirements of tooth extraction are also increasing day by day. However, the traditional e...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a continuous die extraction method to solve the technical problem that the height of the continuous die extraction is too low in the past

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