Summarize the characteristics of roller-gear-cam and structure in ATC. Introduce the tool change process of automatic tool change, draw the motion circle graph.

总结了滚子齿形凸轮的特点及其在自动换刀单元（ ATC）中滚子齿形凸轮的结构形式。

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This machine is equipped with a gear transmission mechanism, and its multi-dies are arranged in line. It can draw steel, aluminum, brass and other kinds of metal wires.

本机采用齿轮变速传动结构，串联组成多模连续拉丝机，可拉拔钢、铝或黄铜等金属线材。

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