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一、改进前工艺小转轴备料的一般方法是将长棒料切断成段料,在单件及小批生产中大都用车、铣或锯床来切断长棒料。在大批生产中,除采用专用下料机外,一般使用普通冲床配置适当的模具,即可实现高效率断料,其工作原理见图1。它的冲头就是活动剪口1,压紧块2把棒料夹紧在支承块3中。当冲剪力超过工件材料的屈服极限,压入深度达到h值时,就使棒料断裂成段料。不论上下剪口为V形还是圆弧形的模具,都会使金属材料产生变形,导致段料端部呈扁平形状,断面具有光亮的挤压带及凹凸不平的撕裂带区,出现表面粗糙及轴料
First, to improve the process before the preparation of a small shaft material preparation is the long bar cut into pieces of material, mostly in single and small batch car, milling or sawing to cut the long bar. In a large number of production, in addition to the use of special feeding machine, the general use of ordinary punch configuration appropriate mold, you can achieve high efficiency broken material, its working principle shown in Figure 1. Its punch is the movable notch 1, the compacting block 2 clamps the bar in the supporting block 3. When the punching shear force exceeds the yield limit of the workpiece material, pressing depth reaches h value, the bar material is broken into pieces. Regardless of the upper and lower notch is V-shaped or arc-shaped mold, will cause the deformation of the metal material, leading to the end of the segment was flat, the section has a bright extrusion zone and rugged tear zone, the surface roughness and Axle material