The cold extrusion process and mould design have been introduced of the pressing drill sleeve.

介绍了冲钻套筒的冷挤压工艺、 模具设计。

The invention comprises a handle and a drill bit, wherein the drilling bit has a trocar structure consisting of two parts, namely a sleeve and a tube core needle.

本发明包括手柄和钻头，钻头为套管针结构，包括套管和管芯针两部分组成。

The invention comprises a handle and a drill bit, wherein the drill bit takes the structure of a trocar and consists of two parts of a sleeve and a mandrin;

本发明包括手柄和钻头，钻头为套管针结构，包括套管和管芯针两部分组成。

The invention discloses a tree body injecting machine which comprises an electric drill device, an injecting part, a fixing sleeve and a medicine discharging device.

本发明公开了树体注射机。它包括有一电钻装置、一注射部、一固定套以及一出药装置。

The results shown that the extruded force is decreased and the die life is increased. The quality of the sleeve which is used in rock drill can meet the needs of design.

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。