Design Of Cycloid-Pin Decelerator Of Serial Robot Based On Virtual Reality

Decelerator, as an indispensable role in mechanical transmission, has been diversely applied in fields of petrochemical, shipping, automobile transportation, etc. In recent years, more and more researches on developments about decelerator and performance improvements have been conducted. The goal is to make decelerators more qualified to meet the requirements of decelerating devices of modern industries, which is being able to pass torque efficiently within reasonable range of vibration noise under the circumstances of heavy load. Normally when we design a decelerator where situations are less required, size will not have large influence of the transmission system. However, as the device requirement of transmission system being high-speed, heavy-load, common decelerator’s structure cannot withhold the pass of the heavy load, which will cause decreasing of longevity and has huge impacts on transmission system’s functions and efficiency.Given good working functions of decelerators, how to effectively research in structure design, digital model and CAE system analysis, has become the goal of engineering technicians.This paper will focus on variable & structure design, three-dimension modeling, finite element analysis along with virtual reality assembly, explaining their meanings and relations. Details are as follows:1) Based on suitable power, RPM and drive ratio, combining with mechanical design theory, we can have the main parameters of the decelerator.2) Cycloid-Pin Decelerator’s three-dimension digital modeling: using three-dimension software Pro/E, based on the geometry parameters of each component and functions between each other, along with the definition of characteristic parameters in three-dimension model, we apply digital and parametric modeling for all the components and the whole three-dimension body.3) Because there will be pitting, scoring and pin gear fracture among cycloid and pin gears surface, we have to calculate engaging force between cycloid and pin gears, force between W device pivot and cycloid pin hole, force between rotation axis and cycloid inner hole. Applying finite element analysis to cycloid using ANSYS, we have cycloid strain figure, displacement vector figure along with bending stress distribution figure and compare calculation with simulation results. On the other hand, there will be failure on cycloid-pin gear surface given large connection stress so we have to calculate the largest amount of the connection stress withstanding. Using Workbench to analyze the connection between cycloid and pin gears, we have gear connection force distribution figure and compare to the simulation results.4) Put all components into Quest3D, and copy them into one single working interface. Apply program development to the components’ virtual assembly emvironment, assembly motion rate and relative assembly relation to check the rationality of the structural design in the assembly craft.In our analysis, we discussed the integrating application of three-dimension software Pro/E and finite element software ANSYS, thereby, implementing computer auxiliary engineering design of Cycloid Decelerator in Pro/E-ANSYS environment. Finally, disassemble and assemble cycloid decelerator’s components using Quest3D virtual-reality software; then we are able to perform technical craft analysis, assembly and manufacture ability analysis in design process, for component or even whole body. Thus, we can have devices’ design evaluation and function prediction results.