本文分析了模具振动方向与被加工金属的流动方向相同的一类振动塑性加工系统的模具阻力。
In this paper a kind of die resistances of oscillatory plastic working process was analyzed in which the oscillatory of dies had the same direction with worked metal flow.
金属的加工，采用使被加工金属的塑性变形来代替切割，可增加加工效率和被加工件的强度。
The application of plastic deformation instead of cutting is capable of increasing efficiency and strength of the pieces worked in metal-working.
金属物与玻璃可再次被熔化加工，而且不明确地讲，其质量几乎不会减少；而纸也能回收处理达6次之多。
Metals and glass can be remelted almost indefinitely without any loss in quality, while paper can be recycled up to six times.
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