The upsetting test of metal powder sintered preform by blow speed of the hydraulic press, crank press, pneumatic hammer and high energy rate forging hammer was reported.

研究了用液压机、曲柄压力机、空气锤及高速锤的打击速度对粉末冶金烧结体进行的镦粗试验。

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The results show that the upsetting deformation law of sintered preform is alike with the compact body, and the crank press is the best equipment of powder forging technology.

结果表明：烧结体的镦粗变形规律与致密体相同。指出了曲柄压力机是粉末锻造工艺的最佳设备。

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One of the most important problems in the field of forging and stamping is to improve the dynamic property and accuracy of crank press and to reduce the noise in stamping process.

提高曲柄压力机的动态性能和精度，降低冲压噪声是当今锻压领域亟待解决的重要问题之一。

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