TJK6916CNC Horizontal Boring And Milling Machine Development And Research Of Key Technology

With the rapid development of manufacturing, a large number of CNC equipment are needed, in which CNC horizontal boring and milling machine tools is one of the most widely devices. In this situation, the author of the thesis has designed and developed CNC horizontal boring and milling machine tools entrusted by the enterprise.First, according to the users’requirements, the author designed the engineering drawing on the basis of CAD engineering software, and then manufactured the prototype of TJK6916CNC horizontal boring and milling machine tools.Deeply analyzing and researching the problems of the joints between the parts, by means of vibration exciter exciting and acceleration transducer picking up each joint part of the prototype machine, modal testing is done and the machine tools’vibration signals are obtained. Then collecting vibration sigoals are put into modal identification procedures programming by Lab VIEW, modal parameters of each joint parts are achieved and stiffness and damping parameters of each joint parts are identified by using the optimization recognition method of the finite element parameter. By using COMBIN14unit to simulate the identified joint stiffness and damping parameters of each joint part, the finite element model of the complete machine is established, and the modal analysis is carried out to get the each steps natural frequency and vibration type. In order to verify the finite element theory, the whole machine’s modal test is analyzed, the analysis results of the theoretical and the test is compared, the finite element model is proved to be true, and the reasons of error is analyzed. According to the results of modal analysis, the weak unit of the machine tools structure is analyzed, the structures of the major components, such as the sliding seat, the spindle box, ram, are designed optimized. Furthermore, the creation design of coupling form and device of the machine tools’joint parts are carried out, for example, the transmission system along the X axis, supporting and fixing structure and the locking mechanism of machine tools. As a consequence, good dynamic property is obtained with the whole machine so as to the author and the team members have obtained five national patents.For optimized machine tools’structure, the type of boring machine bed and spindle box unit, material, mesh size were defined, meshing was completed and k file was output in Ansys. The k file was edited; the keyword&boundary conditions of the spindle box movement were defined in1s-prepost. After editing, they were submitted to dyna971solver to solve, the calculated result was treated by using1s-prepost. The influence on boring machine bed was observed by the use of dynamic simulation, when the spindle box moved up and down. Then, the post-processing of the bed stress, strain and energy has good dynamic characteristics.Having conducted market research and compared the electrical control system of current similar machine at home and abroad, once failure of which happens, serious accident will follow, with high reliability requirements of the limiting device of CNC Horizontal boring and milling machine. This paper studies the negative logic control theory model of limit control suitable for the applicability of CNC Horizontal boring and milling machine, and develops the limit control circuits of X, Y and Z axis based on the model. Later, good results are achieved in application of the circuits in practice.Thoroughly researching and analyzing of the processing parts’features of CNC horizontal boring and milling machine tools, the paper has put forward an innovative method of grouping suitable for which based on the GT technology innovation. According to the method of grouping, the digital control machining programs of modularization and parameterization have been researched and developed and modularization programs have been packaged to construct automatic programming system suitable for CNC Horizontal boring and milling machine based on VB software.With the general application of the research conclusion above, the CNC horizontal boring and milling machine has been designed and produced completely and put into market with good results. The machine tools provides reference for development and research of the similar one. And it has great engineering significance to elevate the market competitiveness of these products. In addition, the research and analysis methods in the article also have certain reference significance in the improvement of other types of machine tools.