A Method for Static Stiffness Evaluation of CNC Machine Tool

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: 2021-05-18
北京科信机电技术研究所有限公司
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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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  • A Method for Static Stiffness Evaluation of CNC Machine Tool
  • A Method for Static Stiffness Evaluation of CNC Machine Tool
  • A Method for Static Stiffness Evaluation of CNC Machine Tool

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Embodiment Construction

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0050] like 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 too...

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Abstract

The invention discloses a method for evaluating the static stiffness of a numerically controlled machine tool. Firstly, the stiffness measurement value of the machine tool is indexed to evaluate the relative stiffness of machine tools of different specifications with the stiffness index; And record the influence of the weak stiffness link; then compare the stiffness in the three coordinate directions of the machine tool to investigate the influence degree of the weak stiffness direction and the weak stiffness ring of the machine tool. This method can be more accurate to the measured stiffness value curve by continuously applying load force to the machine tool. Analyze the stiffness of the machine tool and find the weak link in the stiffness chain of the machine tool; through index comparison and evaluation, the actual stiffness of the machine tool can be obtained intuitively and simply, which is convenient for comparison and evaluation of relative values; according to the stiffness consistency of the machine tool, a reasonable stiffness index value Evaluate the quality of machine tool performance.

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...

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Application Information

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Patent Type & Authority Patents(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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