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发明公开
CN103357769A 一种拉胀装置 无效 - 撤回

一种拉胀装置
摘要：
本发明公开了一种拉胀装置，包括拉胀杆和安装在所述拉胀杆一端的拉胀头，所述拉胀杆外面设有拉胀管，所述拉胀管两端设有管板，所述拉胀管，外面套有被加工工件，所述拉胀管的一端设有喇叭口。本发明只需将拉胀管的一端先固定拉胀，整个拉胀过程中拉胀管的另一端自由收缩，消除了拉胀管的轴向应力，延长了拉胀管的使用寿命。
摘要（英）：

The invention discloses a drawing and expanding device which comprises a drawing and expanding rod and a drawing and expanding head installed at one end of the drawing and expanding rod. A drawing and expanding tube is arranged outside the drawing and expanding rod, tube plates are arranged at the two ends of the drawing and expanding tube, and the outside of the drawing and expanding tube is sleeved with a work piece. A horn mouth is formed in one end of the drawing and expanding tube. According to the drawing and expanding device, people only need to fix one end of the drawing and expanding tube for drawing and expanding, in the whole process of the drawing and expanding, the other end of the drawing and expanding tube retracts freely, therefore the axial stress of the drawing and expanding tube is eliminated, and service life of the drawing and expanding tube is prolonged.

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