Research And Development Of High Speed Machining Experiment Table

High speed cutting is a much higher technology than conventional cutting speed.Compared with conventional cutting,high speed cutting has many advantages,such as large volume of material,high feed rate,small cutting force and small degree of thermal deformation in unit time.Now it has become the trend of modern machine tools.However,the high speed processing technology is not mature enough,and some key areas need to be broken through.In addition,in the field of micro feed technology such as precision cutting,the displacement resolution of ordinary machine tool worktable is low.In view of the urgent need for the research of micro cutting technology,this paper presents the development of an experimental platform for high speed cutting.High speed electric spindle is one of the most important parts of the test bench,electric spindle unit affect the accuracy and stability of the Taiwan and the scope of application,its dynamic performance plays a key role in high speed machining;3D micro platform is the feed components of experiment bench,micro machining of workpieces using the micro feed function;knife library system the role is to achieve the automatic tool change function test.This article is mainly designed and studied in the following aspects:(1)In the design of spindle housing,we need to meet the stiffness requirements of spindle box,considering the accuracy of the box and the dovetail groove structure,so as to ensure that the spindle line is perpendicular to the workbench plane of the test bench after the spindle is installed.First,the three-dimensional model of the electric spindle box is established,and then the structure is improved and optimized by finite element analysis.Finally,the two-dimensional drawing of the box is drawn and the physical object is processed.Through the experiment,the electric spindle box meets the design requirements.(2)In the design of X and Y to the micro motion platform,this paper adopts the symmetrical structure form of piezoelectric ceramic actuators and the inner and outer layers,so that the functions of X and Y to drive the micro motion platform can be realized on the same level.On the selection of flexure hinge parameters,the hinge parameters are determined by the hinge parameters,which affect the stiffness,accuracy,frequency and displacement of the platform,and the multi-objective optimization function is used to optimize the hinge parameters.The rationality of the structure design is verified by the static analysis in the finite element method.(3)Completed the design of Z to the micro motion platform.With the motor and screw drive,the symmetrical structure of double elastic body was put forward,and the finite element and stiffness analysis of the platform were carried out.The local main structure of the Z to the platform is designed and manufactured,and the experimental verification is carried out by the PLC system.The results show that the designed platform structure meets the requirements.