Based on the basic principles of differential geometry the locus equation of the movement of the grinding wheel center during clearance face grinding of the major cutting edge of a ball nose end milling cutter with equal orthogonal clearance angle is deduced,which supply the NC grinding of the clearance face of a ball nose end milling cutter with a feasible mathematical mode

Calculation of the front wheel caster angle in passenger cars;

For improving the high-speed stability of a 4×4 off-road vehicle cornering on bent road,a 4-DOFs dynamics model for a vehicle is built,and the yaw rate transient responses with different caster angles at different vehicle speeds are calculated.

This text introduces the process of design improvement of the air suspension guide arm,and analyzes the guide arm and kingpin caster angle before and after the improvement.

The are four major perspectives in recent studies of labor theories,that is,the perspective of the civil rights or the civil society,the cultural perspective,the class perspective and postmodern perspective,which interpret the laborers in terms of the relationship between the state and society,between profits and property,between the city and the countryside,cultural and symbolic sign.

With the helical cone sharpening method not only the straight major cutting edge and the better distribution of the clearance angle can be obtained,but also the problems,that the strength of the drill's core is not strong enough when sharpened with the variable lead helic.

In this paper,the change of peeling clearance angle was researched,and the optimum change was given.