This paper has designed the T-channel, the fish-tail channel and the coat-hanger channel, and compared them separately. The conclusion has been obtained, which the coat-hanger channel conforms to the production technological requirement of melt-blown nonwoven fabric. In order to further confirm the coat-hanger channel design, the pressure and speed distribution of flow process which polymer melt flow in the channel have been simulated by ANSYS. The results indicated that the coat-hanger die channel conformed to the design requirement perfectly.

A wheel-legged hybrid robot was put forward. First, the mechanical design of this chassis was introduced. Second, based on the kinematic analysis, comparison between the robot with the active transition system and that with the passive transition system was made. Third, the process of overcoming three kinds of obstacles was simulated. Finally, the conclusion can be made that this hybrid locomotion mechanism with the active transition system has good performance on rough terrains.

Globoidal indexing cam mechanism is the spatial indexing mechanism of high speed, high precision and widely used in modern machine and automatic production line.But the working profile of the globoidal indexing cam mechanism is not fair for the space curved surface and it is difficult to model. The traditional design method requires a great deal of calculation, and the design process is complexed, we have to repeat the entire design process when changing any parameters, lead to low design efficiency and poor universality. To solve above disadvantages, this paper used the space meshing principle and space coordinate transformation method, based on 3 d modeling software Pro/ENGINEER, using vc + + and Pro/toolkit for secondary development, realize the parametric modelling of globoidal indexing cam mechanism, and the simulation and analysis of the generated cam mechanism.

Based on the CMM, the paper firstly proposes and analyzes a new contact point regress method, which adapts to measure any type of spatial cam profile. The coordinates of the measure point are regressed to that of the practical contact point of the cutter. This method realizes the measure of the practical profile of the spatial cam and establishes the mathematical model and error calculate method. In the end, a design example is present. This method will offer a new method for the inspection and error calculation of the spatial cam.

Design the mechanical structure of automatic CNC grooving and bending machine based on the modular design method, and the three-dimensional mechanical structure model is created out using Pro/E; design the control system of automatic CNC grooving and bending machine based on the open CNC system theory, the control structure takes PC and motion control card method, and the control software is developed by Visual C++ 6.0. Finally the automatic equipment has been developed which has advantages of automatically processing, high precision and low price.