One, strong dismiss technology
Strong cutting into parts is the technology of a kind of punch that uses die to make data separate, include to fall to makings, punching, cut, analyse is cut and build the technology such as the edge, but often pointing to usually fall makings and punching. This craft can make material into the spare parts directly namely, can think again bend, pull mix greatly shape wait for working procedure to prepare. Rush down the part that wants form or semifinished product from material, call fall makings, the opening that wants form rushs on workpiece, be called punching.

1, strong reduce a process
(1) flexibility is out of shape. (2) plasticity is out of shape. (3) rupture detached.
2, the strong clearance that reduce a standard
(1) what be worth to the clearance that reduce a standard is affirmatory (2) the effect that the strong clearance that reduce a standard reduces to rushing
3, the computation of size of point of protruding, sunken model
Precision of mould point size is the influence develops the chief factor that reduces a dimension precision, the reasonable clearance of the mould also should be assured by mould point size and its public errand.
4, strong cut force into parts to reach its to reduce a method
(1) calculate to what reduce force
(2) reduce to the method that reduces force
5, nicety is strong cut into parts
(1) essence of life develops a way (2) half choice is strong
6, rebuild
(1) outside the predestined relationship rebuilds (2) inside aperture rebuilds

2, curve craft

1, bend be out of shape process
(1) flexibility curves level. (2) plasticity curves level.
2, bend be out of shape the characteristic of the process
(1) be out of shape the area basically lies bend round part part, and in what be far from round horn area two paragraphs do not happen be out of shape.
(2) in bend be out of shape inside the area, of its outskirt tangential the metal suffers drawing to grow, of the area inside its tangential metallic press press shortens. Be out of shape in these two inside the area, have length of layer of a metal changeless, namely neutral line of meet an emergency.
3, the smallest radius of bend
(1) the position of neutral line of meet an emergency. When strong pressing plate expects, those who be affirmatory punch most roundlet horn radius and bend semifinished product
Dimension, must determine the position of neutral line of meet an emergency first.
(2) the smallest radius of bend is decided really. In curving a process, material is outer fiber suffers pull stress, when the ply of material is certain, radius of bend is smaller, pull stress bigger.
4, curve spring back phenomenon
(1) the computation that spring back is worth. When curving the master piece outside be out of shape do not suffer after the end to use, always accompany bouncy be out of shape, make bend between curve central part and radius of bend to become the dimension that is the same as a mould is abhorrent, this kind of phenomenon calls spring back.
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