| Due to the advantages of high machining efficiency, good surface quality and small cutting force, high speed machining technology is recognized as advanced processing technology of oriented toward the 21 st century.Hydraulic power chuck has been widely used in the high-speed CNC lathes, grinders and CNC milling centers, due to high speed, clamping force and compact structure. However, the loss of dynamic clamping force because of the centrifugal force of its massive jaws limits the hydraulic power chuck speed performance into full play.First, on the basis of researching on precision in Tsinghua university. For chuc k plate of body and wedge-catch system in the assembly process of gap is too big or too small and poor accuracy. According to the principle of grouping exchange grouping exchange assembly method is proposed. Contrast experiment results and t heoretical analysis show that the method of grouping interchangeable assembly chuc kcentering accuracy is greatly improved.Then, Study of chuck clamping force. On the basis of experiment by the goo d wedge chuck as the research object, carry out friction and wear experiments. Tes t the chuck clamping force changing with the number of clamping. And using scan ning electron microscopy(SEM) and energy spectrum analyzer(EDS) analyzed chu ck friction pair surface morphology. Concluded that chuck friction and wear are m ainly oxidation wear and abrasive wear, adhesive wear is complementary.Adopt the method of finite element analysis simulation is carried out on the clamping force of chuck, detailed describes the process of finite element simulation, this paper briefly describes the geometry during the process of simulation model of simplified boundary conditions, geometric model set, and the setup of the process. The effect factors of chuck clamping force is analyzed, and through the finite element method to carry on the simulation, obtained the chuck friction coefficient, using parameter and jaw materials to chuck the influence law of clamping force. Finally, the experimental method to explore the chuck of dynamic clamping force and speed. Provide the technical support for the optimization design of the chuck.This subject targeting the wedge type power chuck, applies the second development functions of ANSYS to develop the parameterized chuck finite element analysis system elementarily. ANSYS parameter Design Language(APDL) is the nuclear technique for the second development of ANSYS. This paper illuminates the development of the parameterized module with the example of Wedge chuck KT55-200. |
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