圣霖国际【精益求精】-forging采购-forging

随着电动机的发明，十九世纪末出现了以电为动力的机械压力机和空气锤，并获得迅速发展。第二次***以来，七十五万千牛的模锻水压机、一千五百千焦的对六万千牛的板料冲压压力机、十六万千牛的热模锻压力机等重型锻压机械，和一些自动冷镦机相继问世，形成了门类齐全的锻造机械体系。

With the invention of motor，forging采购， the mechanical press and air hammer powered by electricity appeared at the end of nineteenth Century， and developed rapidly. Since the Second World War， the forging water press， one thousand and five hundred thousand char， the punching press of Liu Wanqian cattle， the hot forging press of sixteen thousand thousand cattle， and some automatic cold heading machines h***e come out in succession， forming a complete system of forging machinery.

基本工序：自由锻造时，锻件的形状是通过一些基本变形工序将坯料逐步锻成的。自由锻造的基本工序有镦粗、拔长、冲孔、弯曲和切断等。

The basic process is: free forging， the shape of forging is gradually formed by some basic deformation processes. The basic process of free forging is upsetting， drawing， punching， bending and cutting.

低塑性拔长时，应注意选择合适的送进比，送进比太小时，变形集中在上下部，中心都锻不透，并沿轴向产生拉锻造应关于锻件的一些基本知识力，导致内部横向裂纹产生。在镦粗时，常用软衬垫镦粗或叠镦（用于锻薄饼形零件），以改善变形的不均匀性，forging，防止产生表面裂纹。

When low plasticity is pulled out， attention should be paid to selecting suitable delivery ratio， sending too much time， deformation on the upper and lower parts， and the center can not be built，forging报价， and forging along the axial direction should be related to some basic knowledge of forging， resulting in the occurrence of internal transverse cracks. In the upsetting， commonly used soft liner (for upsetting or folding upsetting forging thin pancake， uneven parts) to improve the deformation， prevent the generation of cracks on the surface.