Research On The Asymmetric3-P-(2SS)Parallel Mechanism

3D printing technology is introduced into the traditional industrial production, It has become a development trend of modern industry. To achieve rapid precision of3D printing, mainly rely on3D printing technology itself and3D printing platform. At present, the3D printing platform mainly adopts rectangular coordinates platform and parallel platform two forms. Parallel platform based on symmetrical Delta structure variation pattern, working space is small, manual operation is not convenient. So the paper puts forward the asymmetric3-P-(2SS) institutions, research and development of3D printing platform, for the research of related technologies:(1) Analyzed the structure characteristics of the traditional Delta institutions, the use of asymmetric3-P-(2SS) parallel platform, research and development of3d printing platform, makes the parallel3D printing platform has large operation space, establish mathematical model.(2) Inverse solution of asymmetric parallel mechanism to solve is easy, but it is difficult to solve positive solutions. Based on the actual status of the parallel mechanism, to simplify the institution model, established the virtual linkage parallel platform model, using the theory of spiral, to achieve the organization degree of freedom, at the same time by using the theory to get singular configuration of institutions; By differential iteration method to solve agency of positive solutions.(3) Using the method of polar coordinates search for new3-P-(2SS) parallel mechanism workspace analysis, Through a given static platform size and moving platform size, the length of the connecting rod and the rotation of the spherical pair, using the Matlab visual programming, to obtain the workspace of parallel mechanism. Through analysis of parallel mechanism relative workspace to get moving platform size and static platform size and length of connecting rod for the influence of working space.(4) Based on d’Alembert principle using Lagrange method to establish the dynamic model of parallel mechanism, under the condition of the end of the actuator trajectory was be given, according to the mechanism dynamics equations using Matlab to calculate the three slider driving force, and then under the environment of ADAMS, process dynamics simulation analysis, by comparing the simulation numerical with two different environment, to prove the validity of the model.(5) Finally, considering the3-P-(2SS) parallel mechanism kinematics error, using the mechanism kinematics differential equation established the total error analysis model, One of the error sources in the form of variables as the influencing factors for institutions, and the rest of the error source assignment as constants, to analysis the effect for institutions of a single error source.