Numerical control machine tool static rigidity evaluation method

An evaluation method, the technology of numerical control machine tools, applied in the direction of machine/structural component testing, instruments, measuring devices, etc., can solve the problems of inability to compare stiffness values, inconsistency of stiffness values ​​in reflection links, and no comparison method, etc., to achieve convenience Compare the effect of evaluating relative values

Active Publication Date: 2018-11-23
北京科信机电技术研究所有限公司
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  • Application Information

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Problems solved by technology

Under the action of different load forces, it does not reflect the inconsistency of the stiffness values ​​of each link;
[0007] (3) Machine tools of different specifications cannot compare the stiffness values;
[0008] (4) There is no comparison method, and the quality of machine tools cannot be evaluated by stiffness

Method used

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  • Numerical control machine tool static rigidity evaluation method
  • Numerical control machine tool static rigidity evaluation method
  • Numerical control machine tool static rigidity evaluation method

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Embodiment Construction

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050] Such as figure 1 As shown, the present invention provides a method for evaluating the static stiffness of a numerically controlled machine tool, specifically a method for evaluating the stiffness index of a numerically controlled machine tool and reflecting the consistency of the stiffness chain. The relative stiffness of the standard machine tool; then linearize the continuous measurement of the stiffness value of the machine tool, investigate the cons...

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Abstract

The invention discloses a numerical control machine tool static rigidity evaluation method. Firstly the measured value of the machine tool rigidity is indexed and the relative rigidity of different specifications of machine tools is evaluated by the rigidity index; then the continuously measured rigidity value of the machine tool is linearized to investigate the stiffness consistency and observe and record the influence situation of the weak stiffness link; and then the stiffness of the machine tool in three coordinate directions is compared, and the influence degree of the weak stiffness direction and the weak stiffness link of the machine tool is investigated. According to the method, the load force is continuously applied to the machine tool, the measured stiffness value curve can be applied to analyze the stiffness of the machine tool more accurately and the weak link of the machine tool stiffness chain can be found. The actual situation of machine tool stiffness can be obtained directly and simply through index comparison and evaluation so as to compare and evaluate the relative value; and the performance quality of the machine tool is evaluated reasonably by the rigidity index value according to the rigidity consistency of the machine tool.

Description

technical field [0001] The invention relates to the field of machine tool performance testing, in particular to a static stiffness evaluation method of a numerically controlled machine tool. Background technique [0002] For metal cutting machine tools, the existence of external forces (cutting force, gravity, inertial force, etc.) The direct consequence is that the accuracy of the workpiece is reduced. Therefore, the performance of the machine tool against external force deformation is an important index reflecting the machining performance of the machine tool, which is generally expressed by the static stiffness of the machine tool. Testing and evaluating the static stiffness of machine tools is an important part of ensuring high-quality machining of machine tools, and is also the basic premise for improving the performance of machining systems. [0003] However, in the traditional static stiffness detection method, the stiffness in the direction of the feed axis (X axis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M99/00
CPCG01M99/007
Inventor 彭宝营张瑞乾杨庆东
Owner 北京科信机电技术研究所有限公司
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