| Virtual prototyping technology as a new kind of technology, it plays a growing part in the field of manufacturing, and also has achieved a level of accomplishment in our country. Virtual prototype in combination with computer technology, can find product design error in advance and also complete some experiments that people can’t do. This technology meets the green manufacturing concept advocated by modern society, and also can save money for the enterprise largely and shorten the development cycle. This paper mainly combines the basic theory of modal analysis, finite element analysis theory, the rationale of virtual prototype, robot D-H modeling theory and kinematics analysis theory to achieve the optimization of the stamping production line.The concrete research content is as follows:(1) Using the finite element analysis software ANSYS to study the structural characteristics of the stamping automatic production lines. Within the crank angle range of 0° to 180° every 10° to take a set of data for research, a total of 19 sets of data. Through the statics analysis of the fuselage shows the strength of the fuselage meet engineering requirements. Through the modal analysis of the fuselage to obtain the frequency curve and formation within a cycle of the shaft rotation. According to the results we can see the natural frequency curve of the fuselage show some regularity start from the 11th order, and with the increase of order number, the frequency difference between adjacent orders becoming smaller and smaller. So the vibration characteristics of the fuselage is greatly affected by the natural frequency order from 1 to 10. In the working status should avoid the frequency range from 1 to 10 order, to prevent resonance resulting in great harm.(2) In order to improve the beat of the production of stamping production line, a better new method for coordination between the motion of the press and the robot is proposed. The method combines the result of modal analysis and the movement of the robot and the press effectively reduce waiting time of the robot. And in order to assess the method of the pros and cons of different schemes proposed three kinds of evaluation index of the movement coordination scheme.(3) In order to establish a complete stamping line virtual prototyping system, three dimensional model design, virtual assembly, and static interference detection of press and robot of the stamping line are finished by Pro/E. By using software ADAMS to complete virtual modeling and dynamic interference detection, using sensor and measuring tools to complete the virtual simulation work, such as the double detection system, the working space control system and the material grab weight control system of the robot etc. It can actually simulate the basic components of the normal operation of the stamping production line.(4) In order to optimize the stamping production line, using the new motion coordination method to plan the trajectory of the robot, and using ADAMS software to complete forward solution and inverse solution of the robot. Using the co-simulation function of ADAMS and MATLAB to compensate trajectory error, real-time tracking and feedback the trajectory error, and control the error within the range of 0.001.This topic research on virtual prototype technology of stamping production line is still in its infancy, is not perfect, but have achieved integrative innovation of several technology, such as virtual prototyping design, coordination of production line, simulation of emergency stop, trajectory planning of production line and so on. Moreover, it proposed a novel research method to switch data among four kinds of software, consider various problems from multi angle and parallel research with multi-disciplinary basic theory. |
PDF Full Text Request