Method for using balance post rod in drawing process for machining high-tension material asymmetrical component

Abstract

The invention relates to a method for using a balance mandril in the drawing process for processing an asymmetrical component of a high tension material. The method comprises that: a mould is arranged and locked on a machine while the balance mandril is arranged at one end with smaller stress during mould forming; an upper mould and a sliding block of the machine are locked and move downward, and when the upper mould and plates on a blank holder contact, the height of the balance mandril is adjusted to contact the sliding block of the machine simultaneously; the upper mould contact and press downward the blank holder, the mandril descends along with the action of upward pressure at the same time, and at the moment, the balance mandril supports the action of balanced force and descends together; and the upper mould continuously descends to ensure that the mould moves to a lower dead center and the balance mandril descends to the lowest at the same time so as to press the plates and complete shape curing of the component. The method is mainly suitable for forming plates with more than 600MPa of tensile strength, high tension and left-right asymmetry, can ensure that the plates are subjected to full plastic deformation, and reduce tendency of component rebound and distortion, thereby achieving the aim of size curing of the component.

Description

【Technical field】 [0001] The invention relates to a drawing method, in particular to a drawing process using a balanced ejector pin to play a balanced force in eccentric stamping. 【Background technique】 [0002] According to the requirements of stamping technology, the pressure of the machine tool on the mold during production should be at the center of the mold, and the stamping where the pressure center is not at the center of the mold is called eccentric stamping. According to the position of the center of force, it is divided into conventional stamping and eccentric stamping. There are currently four difficulties in the molding of asymmetric high-tensile material parts: 1. The forming pressure is high, and ordinary presses cannot meet the requirements of forming force; The results provided by the simulation software are not practical. 3. The forming limit is strictly limited. High-tensile materials are commonly known as "double high", with high tensile limit (tensile s...

AI Technical Summary

Problems solved by technology

There are currently four difficulties in the molding of asymmetric high-tensile material parts: 1. The forming pressure is high, and ordinary presses cannot meet the requirements of forming force; The results provided by the simulation software are not practical

3. The forming limit is strictly limited. High-tensile materials are commonly known as "double high", with high tensile limit (tensile strength above 600Mpa) and high yield limit.

Therefore, the drawing depth of closed drawn parts is limited

4. The accuracy of parts is difficult to control, and the accuracy is difficult to reach the ideal value due to the rebound and distortion of parts

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