摘要
介绍了水冷式电机外壳挤压铝型材存在的主要质量问题及其产生的原因,以典型的产品为例,分析了传统的挤压模结构存在的问题,指出了传统产品常出现圆柱度超差的原因是其芯模加工难度大而造成模具精度低导致的.提出了一种二爪牙嵌式芯模结构,并介绍了其模具的工作原理及组成要素,含凸台圆柱形的芯模主要特征是有环形槽和U形槽,而牙嵌式芯模主要特征是具有凸耳.实践表明:新型模具具有简化加工、使用寿命长、制造成本低及制造周期短的特点.
Abstract
The main quality problems and the causes of extruded aluminum profiles for domestic water-cooled motor casings were introduced.Taking a typical product as an example,the prob-lems existing in the traditional extrusion die structure was analyzed.The reason for the low cylin-dricity of traditional products were pointed out,it was due to the difficulty of the upper die pro-cessing,which results in low precision of the die.A mandrel die structure with two-claw toothed insert was proposed,and its working principle was introduced,and the constituent elements of this structure were described,including a cylindrical mandrel die with a convex platform,which was mainly characterized by annular and U-shaped grooves,while the toothed insert core was mainly characterized by protrusions.The practice showed that the new type die has the character-istics of simplified processing,long service life,low manufacturing cost,and short manufacturing cycle.
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