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对凿岩机异形内齿套筒的冷挤压整体成形进行了试验研究。结果表明：用径向挤压代替反挤压内齿，能降低挤压力、利于提高模具使用寿命、产品质量，能满足设计要求。
The whole forming of cold extrusion of profiled internal gear sleeve of rock drill was tested. The results show that the use of radial extrusion instead of anti-extrusion internal teeth, can reduce the extrusion pressure, which will help improve the service life of molds, product quality, to meet the design requirements.