The current now technical measure practice that handles spring back of board makings punch

1, proofread labyrinthian
Proofread labyrinthian force to will make force is in punch to be out of shape zigzag centrally area, force lining metal to suffer knead hold, after be being proofreaded, layer of inside and outside by stretchy, the balance of spring back trend that holds two areas is kneaded to be able to reduce spring back after uninstalling.

2, heat treatment
In anneal of labyrinthian and ongoing travel, reduce its hardness and succumb stress can reduce spring back, also reduced labyrinthian force together, labyrinthian hind again temper by dipping in water is hard.

3, excessive and labyrinthian
In labyrinthian production, because flexibility recovers, of board makings be out of shape viewpoint and radius can greaten, can choose board makings the measure that deformation exceeds academic deformation will reduce spring back.

4, hot turn
Choose heat labyrinthian, choose appropriate temperature, the data has contented hour bate, can reduce spring back amount.

5, pull a turn
This method is bring to bear on in board makings is labyrinthian tangential and tensile, alter the stress state of board makings interior and dispersed circumstance, let whole section be in plasticity drawing to be out of shape inside limits, after these uninstalling, the spring back trend of layer of inside and outside each other are quits, reduced spring back.

6, some are constrictive
A little constrictive technology is the course is decreased thin outside the ply that side panel expects comes the length that the side panel outside adding expects, make the spring back trend of layer of inside and outside each other are quits.

7, frequently labyrinthian
labyrinthian figuration cent is become will undertake frequently, in order to eliminate spring back.

8, passivation of inside round horn
Undertake from the inside of labyrinthian place constrictive, in order to eliminate spring back. When form of board form U is labyrinthian, because both sides is symmetrical labyrinthian, choose motive of this kind of means to had been compared.

9, change collectivity is pulled delay turn some into labyrinthian figuration
the part the one repass after some choose labyrinthian take shape is played delay figuration in order to cut down spring back. The commodity with this kind of brief to 2 dimension appearance method is useful.

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