Compared to two types of common pulling-yarn roller device,a special gear-like roller device used in carpet tufting machine to pull yarn is introduced.

Experimental study on effect of thermal deformation parameters on forming process of microgears;

Defect detection for microgear based on image processing and support vector machine;

Based on the discussion on technique difficulty in traditional measurement method of contact for microgear, a new non-contact measurement method of microgear based on CCD imaging is put forward.

Experimental study of micro-gear extrusion with semi-solid ZL101 alloy was introduced.

Aimed at studying the structure of micro-gear, on the basis of simulating analysis with MoldFlow, the injection moulding of micro-gear is experimented and studied.

The precision isothermal forming technology of aluminum alloy micro-gears is studied with a special micro-plastic forming apparatus.

Screw thread forming is the critical procedure, the parting mold mechanism and demoulding mode of mold are introduced, by gear mold core, using gear transmission to drive the running of gear mold core so as to realize parting mold, demoulding is performed by crew thread transmission.