轴瓦在压弯成形时所需要的长度,通常除了按钢层中性层对接面切削量给出长度外,还需添加一个小的长度,这个长度叫镦冲量。镦冲量的大小直接影响外圆贴合度、合金层厚度差和轴瓦弹开量的稳定性。 对于镦冲量的取法,各厂不尽一致。一般小瓦为3～5毫米,大瓦为5～8毫米。 镦冲量的大小取决于轴瓦的外径、厚度和材料的机械性能,它们之间并不存在确定的函数关系,而是一般形式──相关关系。 The length required for forming a bearing bush during press-forming is usually given by adding a small length, in addition to the length of the facing cut of the neutral layer of the steel, which is called the upsetting amount. The amount of upsetting impacted directly on the cylindrical fit, the difference between the thickness of the alloy layer and the bounce of the bearing bolster. The method for the amount of upsetting, the factory is not the same. The general small tile is 3 ~ 5 mm, the big tile is 5 ~ 8 mm. The amount of upset depends on the outer diameter of the bush, the thickness and the mechanical properties of the material. There is no definite functional relationship between them, but the general form - the correlation.