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Development of Thermal Deformation Compensating System of the Rotary Worktable of Milling and Lathing Composite Machining Center

Author: ZhouChaoChao
Tutor: HanZhenYu
School: Harbin Institute of Technology
Course: Mechanical Engineering
Keywords: Rotary table Thermal deformation Real-time compensation Thermal error measurement
CLC: TG54
Type: Master's thesis
Year: 2011
Downloads: 66
Quote: 0
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Abstract


High vertical mill-turn machining centers are widely used in military, aerospace, automotive, shipbuilding, power generation, textiles, mold manufacturing and other manufacturing industries, affecting people's livelihood and national security of the important equipment. However, our heavy-duty precision CNC machining center machining accuracy compared with similar foreign machines, there is still a very large gap, which seriously hampered the development of China's manufacturing industry. In addition to machine manufacturing, processing, assembly errors outside the influence of the machining precision, because the role of heat sources inside and outside the machine, the machine errors caused by thermal deformation can not be ignored and difficult to solve. To develop \The object of study of this topic for the high-end vertical mill-turn machining centers, obtained by the analysis of the heat source for the largest processing center rotary table. Therefore, this type of machine tool rotary tables against the heat generated by deformation, is proposed based on the thermal deformation measurement error compensation scheme, developed real-time compensation of thermal deformation of hardware and software systems, and through the experimental verification of the feasibility of various functional modules. Papers specific work carried out as follows: First, detailed analysis and research abroad in thermal error compensation research status and the current of the main problems on the basis of this study to determine the ideas proposed for real-time thermal deformation of rotary table compensation method. Secondly, the use of three-dimensional modeling software UG rotary table created three-dimensional model into ANSYS simulation software for structural - thermal coupled field analysis, using the simulation results obtained greater impact on the processing quality of the thermal error component coordinate direction. ANSYS simulation in the analysis based on the results, the arrangement affect the machining accuracy and ease of thermal deformation sensor orientation component presented online detection of thermal deformation of these programs, and the measuring position sensor arrangement optimization strategy. Finally, the development of online thermal error compensation system, including data acquisition boards and software part of the system hardware device part of the realization of the thermal deformation error for rotary table line detection and on-line compensation. With Qiqihar Heavy CNC vertical lathe workbench plant to provide alternative experiments carried out to obtain the relevant experimental data, verify the correctness and feasibility of the proposed scheme.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal cutting and machine tools > Milling and milling machine
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