This paper analyzes the tool path generation of the microlens arrays by the single point diamond (FTS) turning,while focuses on the algorithm of tool radius compensation. Firstly, the mechanism of the fast tool servo machining process is introduced. Secondly, the tool path generation for FTS is calculated. The algorithm of tool radius compensation and the form error of the microlens is analyzed. Subsequently, the transitional zone is research, base on the algorithm of tool radius compensation, the optimized algorithm is proposed. Finally, using the optimized algorithm generate the tool path. Modeling of the tool path with the optimized algorithm of tool radius compensation is simulated with MATLAB. The simulation of the 3-D microlens arrays with the algorithm of tool radius compensation has done. According to the modeling of the simulation, algorithm of the radius compensation is discussed. The results show the optimized algorithm can improve the form accuracy of the microlens. The optimized algorithm is practical significant in the tool path generation.

An method was proposed to derive the formula of the overlap coefficient and the influence of main parameters on overlap coefficient were also discussed; The load distribution is deduced and the rule of contact load varying with overlap coefficient was revealed; The results indicate that the increasing overlap coefficient can extend the time of rollers engaging, reducing the contact load of globoidal indexing cam mechanism and altering the load distribution.

A multi-body dynamics simulation model of CJ20-25 AC contactor was established with Pro/E Pro/Engineer)in this paper. A coupling simulation with machine, electric, magnetic on the contactor has been achieved in this model. Dynamic parameters which were called use the secondary development technology of ADAMS. The dynamic contact pressure signal of an AC contactor was obtained with ADAMS's own simultaneous solution such as electromagnetic suction, kinematics and dynamics equations. The simulation results and actual measurement of contactor contact pressure signals are very similar. However, the complexity of the measured contacts vibration is greater than the simulation results because the actual working condition is more complex. This result provides a theoretical foundation to the dynamic contacts contact pressure test.

This paper proposed a method to analysis an external flow-field around a Formula SAE car. Firstly, the body of Formula SAE car was designed conforming to the FSAE rules using CATIA. Then, the model of the external flow-field around the vehicle was established using computational fluid dynamic technology. A comparative analysis of the aerodynamic characteristics was made for the body between the conditions of being without the wing package and being with the wing package under different attack angle to get the static pressure graph, the lift force and the drag force then worked out the drag coefficient and confirmed which is the most suitable angle for the wings. The results showed that: the static pressure of the front body, the front part of the tires and the driver’s chest and head is the highest; the body has good streamline since its drag coefficient is 0.385; the rear wings can supply 65% downforce, when the attack angle of the rear wing is set to 8°. Finally, the real mold was fabricated according to the above 3D model and the analysis results. The method presented in this paper can provide theoretical basis and technical parameter for the aerodynamic formation designing and amelioration of the Formula SAE cars. Also it has guiding significance for the design and aerodynamic analysis of the Ordinary Passenger car.