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杯形毛坯是内齿轮旋压成形所需的预制坯,其参数设计是否合理直接关系着内齿轮的成形质量。在对杯形毛坯设计参数分析的基础上,采用正交试验方法分析了毛坯的壁厚、壁厚差和内径对内齿轮成形质量的影响。研究结果表明:3个参数中以毛坯壁厚对内齿轮的成形质量影响最大;对应每一种内齿轮轮齿,总是存在着一个最优毛坯壁厚,当毛坯壁厚小于该值时,无法成形出质量合格的内齿轮制件。因此在设计杯形毛坯时,可以通过严格控制毛坯壁厚来提高内齿轮的成形质量,同时根据旋压机的经济加工精度来选定壁厚差,还可以降低杯形毛坯的制造成本。
The cup-shaped blank is a preform required for the spinning of the internal gear. Whether the parameter design is reasonable or not directly relates to the forming quality of the internal gear. Based on the analysis of the design parameters of the cup blank, the influence of the wall thickness, the thickness difference and the inner diameter of the blank on the forming quality of the internal gear was analyzed by orthogonal test. The results show that the influence of blank wall thickness on the forming quality of the internal gear is the greatest among the three parameters. For each internal gear tooth, there is always an optimal blank wall thickness. When the blank wall thickness is less than this value, Can not form a qualified internal gear parts. Therefore, when designing the cup-shaped blank, the forming quality of the inner gear can be improved by strictly controlling the wall thickness of the blank. At the same time, the poor wall thickness can be selected according to the economical machining precision of the spinning machine, and the manufacturing cost of the cup-shaped blank can also be reduced.