The calculation of the deformation and the stress of diamond saw blades with protective segment insertions at diffe rent negative hook angle for the direction of core rotation is introduced, and the optimum saw blades structure with protective insertions is calculated by means of finite element software ANSYS.

This paper makes analysis on the common problems in the use of the mine plug-in unit, and introduces several methods for making effective improvement of the protective plug-in unit summed up in the actual works.

Design of the auto-testing system for mine integrated protecting inserter;

With the rapid development of electric automation and standardized safety production in coal mine,more and more electronic protection inserters have been used in different types of electric control equipments for under- ground mining,the development and research of integrated protecting inserter automatic test system for the coal mine has strong society needs and economic benefit.

Test system of mine electronic protection plug-in components based on configuration software;

The paper introduces the reconstruction of old gear shapers machine tool for PLC,servo and inverter.

In response to the characteristic of movement control of the CNC gear shaper,the inner-link transmission structure of CNC gear shaper based on the principle of electronic gearbox was analyzed.

It also brings forward a method of manufacturing bevel wheel with the use of total digitized gear shaping.

The extrusion wound of gear face and the abnormal abrasion of the inserting tool flank during gear shaping are introduced.