The paper research the problem of bow to build the model of cutter with the design technology of virtual product, and built the 3D models of twist drill, gang drill, gear hob;

讨论了用虚拟技术对复杂金属切削刀具进行建模的问题，建立了麻花钻、群钻、齿轮滚刀的三维数字模型；

youdao

Present a method of sharpening twist drills in the interior conical surface and exterior conical surface grinding wheel. A novel sharpening device of linkage-gear compound mechanism is designed.

提出了利用外锥面砂轮实现内锥面刃磨钻头的方法，设计了实现该方法的连杆齿轮组合机构。

youdao

Alongside the Surge, the Twist proves that Espoo's committed to releasing totally customized gear for US carriers, and we'll be especially curious to see how well the swivel works in practice here.

ENGADGET: Nokia Twist launching on Verizon starting September 13