增设强压功能。即对卸料镶块压料部加厚尺寸(正常的卸料镶块厚H 0.03mm),以增加对凹模侧材料的压力,从而***冲切时冲压件产生翻料、扭曲变形。凸模刃口端部修出斜面或弧形。这是减缓冲裁力的有效方法。减缓冲裁力,即可减轻对凹模侧材料的拉伸力,从而达到***冲压件产生翻料、扭曲的效果。
日常模具生产中,应注意维护冲切凸、凹模刃口的锋利度。当冲切刃口磨损时,材料所受拉应力将增大,从而冲压件产生翻料、扭曲的趋向加大。
设计的冲压件必须形状简单,结构合理,以有利于简化模具结构、简化工序数量,即用少、简单的冲压工序完成整个零件的加工,减少再用其他方法加工,并有利于冲压操作,便于***实现机械化与自动化生产,以高劳动生产率。
设计的冲压件,在保证能正常使用情况下,尽量使尺寸精度等级及表面粗糙度等级要求低一些,并有利于产品的互换,减少废品、保证产品质量稳定。
设计的冲压件,应有利于尽可能使用现有设备、工艺装备以及工艺流程对其进行加工,并有利于冲模使用寿命的延长。
简单来说钣金件是金属薄板壳体,冲压件就是用拉伸机或冲床等加工的工件1,钣金件在折弯过程中厚度不会有变化,但在汽
车钣金壳体中应为敲击等原因,一部分表面会有一定变化。冲压厂是不能确定落料尺寸的,应该是在定做模具时由模具厂试定出来的。
In a simple way, the sheet metal part is a metal sheet shell, and the stamping part is 1 of the workpiece, which is processed by a drawing machine or a punch press. The thickness of the sheet metal parts will not change during the bending process, but in the steam.
The surface of the automobile shell should be knocked and so on. Part of the surface will change. The stamping plant is unable to determine the blanking size. It should be determined by the mold factory when making the mould.
In daily mold production, attention should be paid to sharpness of punching and conc***e die edges. When the cutting edge is worn, the tensile stress of the material will increase, and the stamping and bending will increase.
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