减少涡轮增压器壳体加工变形的工艺方案设计

Process Design of Reducing Turbocharger Center Casing Deformation in Machining Process

分析了特殊结构的涡轮增压器壳体加工过程中易变形和形位公差难保证等问题。通过调整加工流程,解决由于产品变形导致测量芯棒无法测量跳动度的问题;用立式数控车代替卧式数控车,消除由于产品自身的重力因素引起的跳动度超差;通过磨修夹具和减小装夹压力降低了产品装夹变形导致的跳动度超差;合适的切削参数选择使切削完全满足了图样的各项精度及表面粗糙度要求。可见合理工艺方案是保证产品质量的最佳途径。

This paper analyzes the causes of easy deformation of the turbocharger casing with the special structure in the machining process and its tolerance to be difficultly ensured. Through adjusting the processing flow,the problem of unable measurement due to the deformation is solved; the vertical NC lathe is used instead of the horizontal one to eliminate its own gravity effect; the grinding fixture is used to reduce the clamping force so as to reduce out- running caused by the clamping deformation; the appropriate cutting parameters are chosen,which completely meet all the requirements of the precision and surface roughness in the drawings. So the visible and reasonable process scheme is the better way to guarantee the product quality.