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Mesoscale elastic thin-walled workpiece deformation on-line prediction and compensation method

A technology of elastic thin wall and compensation method, which is applied in the direction of instruments, computer control, simulators, etc., can solve the problems that affect the processing accuracy, cannot effectively guarantee the processing quality, real-time deformation and timely control, etc., and achieve reliable radial compensation value, Improve machining accuracy and quality, eliminate the effect of radial undercut

Active Publication Date: 2017-05-17
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

Off-line error compensation cannot control the real-time deformation in time. At the same time, the quantitative value of the error is mainly calculated by simulation and completed through the follow-up program compensation. , beating, etc.) to compensate for the deformation caused by it, which affects the processing accuracy and cannot effectively guarantee the processing quality

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  • Mesoscale elastic thin-walled workpiece deformation on-line prediction and compensation method
  • Mesoscale elastic thin-walled workpiece deformation on-line prediction and compensation method
  • Mesoscale elastic thin-walled workpiece deformation on-line prediction and compensation method

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Embodiment Construction

[0040] The present invention will be described in detail below in conjunction with the accompanying drawings and specific examples.

[0041] The processing scale targeted by the present invention is the mesoscopic scale, that is, the processing accuracy requirement is between nanometers and millimeters. Compared with the macro scale, the online prediction and compensation requirements are higher. Therefore, by building a system and calibrating the cutting force parameters, the same process Under the same condition (the same spindle speed n, the same feed per tooth f z , axial depth of cut a p , radial depth of cut a e ) micro-down milling cutting force comparison, relying on the theoretical model of rigid thin-walled parts as a standard reference value, through real-time collection of cutting force data (mainly refer to Y-direction cutting force) to adjust the radial immersion value in real time, so as to complete online prediction and compensation needs.

[0042] Such as ...

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Abstract

The present invention relates to a mesoscale elastic thin-walled workpiece deformation on-line prediction and compensation method and belongs to the machining field. The mesoscale elastic thin-walled workpiece deformation on-line prediction and compensation method is realized by a machine turntable, a dynamometer, a driver, a controller, a cooler, a bracket, a fine milling cutter, an infrared thermal imaging instrument and an adjustment mechanism for compensating radial immersion. With the mesoscale elastic thin-walled workpiece deformation on-line prediction and compensation method of the invention adopted, the deformation condition of a processed thin-walled workpiece can be monitored online in real time; the adjustment mechanism controls a screw and a screw-nut pair to adjust a supporting table in real time, so that radial undercut caused by the deformation of the workpiece can be eliminated, and therefore, machining precision and quality can be improved; and the adjustment mechanism is independent of a machine tool control system and will not affect a tool path planned by an existing program, and therefore, programming efficiency can be greatly increased, and production efficiency can be improved.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to an online prediction and compensation method for the deformation of a mesoscale elastic thin-walled part. Background technique [0002] At present, thin-walled parts with weak stiffness are widely used in aerospace, plastic mold and microelectronics manufacturing and other fields. In the process of processing thin-walled parts, milling force and temperature are important causes of deformation. In order to reduce the error caused by deformation, the usual practice is to choose reasonable processing conditions, such as low feed, small radial or axial cutting Deep and increase the number of tool teeth, but this increases the processing time and processing costs. Although the emergence of high-speed cutting has improved the ability to process thin-walled parts, the problem of machining deformation still occurs in the manufacture of MEMS and micro-milling. In order to improve th...

Claims

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Application Information

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IPC IPC(8): G05B19/406
CPCG05B19/406G05B2219/37042G05B2219/37266
Inventor 王西彬衣杰焦黎王东前项俊锋滕龙龙王昭潘霖刘志兵
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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