This paper designs a platform which is used for material pose alignment of complex curved surface parts laser processing. The parallel platform is based on a hybrid mechanism with five spatial degrees of freedom. The mechanism is built up by three parallel vertical chains {(P-R-C), (C-R-C-R), (P-H)} and two series single opened chains {(P), (P)}. This processing platform is an ideal hybrid platform with 2R-3T, and it has the advantages of both the parallel mechanism and the series mechanism. The DOF (degree of freedom) of the parallel mechanism is calculated and the positions of the moving platform are analyzed. The results of the position-equations are simulated by using ADAMS software. It is shown that the processing platform is able to meet the requirements of any angle positions of various materials processing, and realize material special machining.

In some fields, the rigid prismatic pairs have been gradually replaced by some flexible prismatic pairs. It is described a new type flexible prismatic pair in this paper. Its material is 65Mn spring steel. It is applied to the high frequency vibration field for its elasticity and structural advantages. The prismatic pair is based on a one-way four-bar linkage, which is consisted of some bent plate structures. Firstly its model is designed. Secondly the width error, the incision arc error and some other errors are analyzed in details. Based on the Paros J stiffness calculation formula and the Smith ST error analysis method, its relative stiffness error model is established. Finally by using finite element method, a simulation of deformation is made in the actual working conditions. And the error model is correct.

In order to solve the problems that the functions of exiting upper-limbed rehabilitation robot are single and the structure is complicated, a 6-DOF exoskeleton upper-limbed rehabilitation robot is put forward. The kinematics model of the rehabilitation robot is established and kinematics positive and inverse solutions are solved using D-H transformation method. Three dimensional model of the rehabilitation robot is created by Pro/E and imported into ADAMS/view for the kinematics simulation by Mechanism/Pro. The gotten simulation results of the simulation verify the correctness of theoretical derivation and prove the smooth movement Characteristics of the scheme.