调频调幅轴向花键挤压试验研究

Investigation of Axial Spline Extrusion with Frequency and Amplitude Modulation

花键类零件在动力传动机构中应用广泛,承载能力大,导向性好,定心精度高。常用加工方式主要是切削加工工艺和挤压、滚压的无切削加工工艺,受工艺方法的限制,在薄壁零件外花键加工中,极易造成工件变形,无法满足加工精度要求,特别是在航空难加工材料薄壁细长轴内外花键成形中,由于高温合金材料加工工艺性差,切削力大,是加工的一个难点。调频调幅轴向振动挤压成形加工工艺在加工过程中,模具挤压时附加振动,可有效降低挤压变形抗力,改善加工精度。研究振动挤压过程中的工艺参数,与传统工艺进行对比,同时得到各个工艺参数对加工工艺的定性关系,为优化振动挤压工艺参数和机床调整提供理论依据。进行了调频调幅轴向挤压主要工艺参数的测量试验,得到了调频调幅振动挤压的工艺参数并进行了分析研究,对薄壁细长轴外花键振动挤压成形工艺设计有重要的指导意义。

Spline parts are widely used in power transmission mechanism with large carrying capacity, good guide, high centering precision. The traditional processing method is mainly cutting process and extrusion, rolling of non cutting process. Limited by the process, the thin-walled workpieces are extremely easy to wrongly deform in the spline machining and the accuracy cannot meet the requirement of process. Because the machining process of high temperature alloy material is poor and the cutting force is big, it is difficult to deform the thin wall and slender shaft of aeronautical material. In the process of axial vibration extrusion of spline with frequency and amplitude modulation, the additional vibration can effectively reduce the deformation resistance and improve the precision. Study onthe extrusion process parameters, compared with the traditional process, can find out the qualitative relations of parameters, on which optimization of vibration extrusion process parameters and adjustment of the machine is based. Thus, there is much guiding significance for processing design of spline vibration extrusion of thin wall and slender shaft in the measure and analysis of FM modulation extrusion process parameters.