Research On The Precision Design Of 3-TPS Hybrid Machine Tool

The hybrid machine tools(HMT)is a novel class of manufacturing equipment, which rises in recent years. By using HMT, it is easy to satisfy the requirements of multi-axis NC machining, assemble and measurement, so the HMT can be utilized to fabricate the parts with complex surface. Because of the advantages, such as its high ratio of stiffness to mass, fast response, module design and environment adaptability, it has been an important development direction of new generation machine tool. Many people in the worldwide range have resorted to develop the HMT and they have obtained some achievements. Some types have been applied in production. In our country, although domestic scholars and designers have gotten some research fruits, there is still a great gap compared to the level of the developed countries. One of the factors which limit the development of 3-TPS hybrid machine tool is the accuracy of the HMT. It is still lower than the traditional precision NC machine tool. providing a detailed analysis of the machine tool errors and improving the accuracy of the HMT will accelerate the HMT to production.The dissertation studied the error and simulation of 3-TPS hybrid machine tool developed by Northeastern University, designed the main components of 3-TPS HTM for the precision. And then designed the method of assembly to ensure the accuracy of provided necessary fundamental work for further kinematics calibration and error compensation. The details are as below:With the whole machine for research object, define all the hinges of static and dynamic platform, derived inverse resolution equation and based on parallelogram mechanism deduced the forward and inverse kinematics.The error of driveshaft and parallelogram mechanism of 3-HMT parallel machine tool was analyzed and simulated by MATLAB programming in detail. Reflect the influence of processing error of cutter by arm and bar length error intuitively. Determine the accuracy of the main components of 3-TPS HMT by using precision design theory, following the design task.Analyzed the main assembly components, and designed appropriate programs to ensure the assembly process precision.The dissertation studied the error and simulation of 3-TPs hybrid machine tool, designed the main components of 3-TPS HTM for the precision. It is playing a very important role in improving the accuracy.