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Numerical control machine tool thermal coupling error modeling and compensation method considering machining parameters

A numerical control machine tool and thermal-mechanical coupling technology, applied in the direction of comprehensive factory control, simulator, program control, etc., can solve problems such as complex methods, poor operability, and low portability

Active Publication Date: 2019-09-03
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

[0003] Aiming at the defects of the prior art, the present invention provides a thermomechanical coupling error modeling and compensation method of numerical control machine tools considering processing parameters, which solves the problems that the existing coupling error modeling methods are complicated, poor in operability and low in portability

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  • Numerical control machine tool thermal coupling error modeling and compensation method considering machining parameters
  • Numerical control machine tool thermal coupling error modeling and compensation method considering machining parameters
  • Numerical control machine tool thermal coupling error modeling and compensation method considering machining parameters

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Embodiment Construction

[0033] The invention will be further described below in conjunction with the accompanying drawings and specific implementation examples, a numerically controlled machine tool thermomechanical coupling error modeling and compensation method considering processing parameters, such as figure 1 As shown, the specific steps are as follows:

[0034]Step 1. Build a load milling error test platform based on the LabView data acquisition system, and use a temperature sensor to measure the spindle temperature change ΔT D , the real-time three-way force F is measured by the three-way force sensor X , F Y , F Z , the spindle offset E measured by the laser displacement sensor 1 ,E 2 ,E 3 Experimental data;

[0035] Among them, the process parameters of the load milling test include the axial depth of cut a p , feed per tooth f, spindle speed n; CNC machine tool spindle offset E 1 ,E 2 ,E 3 , where E 1 ,E 2 is the radial error offset of the main shaft, E 3 is the axial error off...

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Abstract

The present invention provides a numerical control machine tool thermal coupling error modeling and compensation method considering machining parameters. The method comprises: establishing a numericalcontrol machine tool spindle thermal error model and a numerical control machine tool spindle unit milling force and temperature field model under the load milling condition; combining the numericalcontrol machine tool spindle thermal error model and the numerical control machine tool spindle unit milling force and temperature field model, and establishing a numerical control machine tool spindle unit thermal coupling error model; establishing a numerical control machine tool spindle unit three-way force prediction model considering process parameters; and constructing a thermal coupling error model considering milling process parameters. According to the method provided by the present invention, the thermal error of the spindle and the error caused by the milling force under the load milling condition of the numerical control machine tool are considered, high-precision machining of the numerical control machine tool spindle under different milling conditions is implemented, a machine tool spindle unit thermal coupling error model with strong robustness and adaptability is constructed, and certain guiding significance is provided for the follow-up research on the numerical control machine thermal coupling error modeling.

Description

technical field [0001] The invention belongs to the technical field of precision machine tool processing, and in particular relates to a numerical control machine tool thermal coupling error modeling and compensation method considering processing parameters. Background technique [0002] With the rapid development of the manufacturing industry, the use of CNC machine tools has begun to tend to high speed and high precision, and its error problems have become more prominent. The macro classification of errors affecting CNC machine tools includes machine tool errors, other errors in the process system, and detection errors. Among them, the four errors of machine tools, thermal errors, shape and position errors, force errors, and tool wear errors account for more than 75% of all errors in machine tools. The errors produced by these machine tools seriously affect the machining accuracy of the machine tools. Since the influence of thermal errors accounts for more than one-third o...

Claims

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Application Information

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IPC IPC(8): G05B19/404
CPCG05B19/404G05B2219/37211Y02P90/02
Inventor 岳海涛郭辰光李强赵丽娟丁广硕
Owner LIAONING TECHNICAL UNIVERSITY
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