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Main shaft-knife handle joint surface nonlinear dynamic characteristic parameter identification method

A nonlinear dynamic and characteristic parameter technology, applied in vibration testing, testing of machine/structural components, measuring devices, etc., to solve problems such as nonlinearity of the spindle-tool holder system

Inactive Publication Date: 2013-07-10
TONGJI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

None of the above solutions can effectively solve the problems caused by the nonlinear problem of the spindle-tool holder system

Method used

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  • Main shaft-knife handle joint surface nonlinear dynamic characteristic parameter identification method
  • Main shaft-knife handle joint surface nonlinear dynamic characteristic parameter identification method
  • Main shaft-knife handle joint surface nonlinear dynamic characteristic parameter identification method

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0042] Such as figure 1 As shown, a method for identifying the nonlinear dynamic characteristic parameters of the spindle-tool holder joint surface includes the following steps:

[0043] (1) The finite element analysis model of the spindle-knife holder is established by using the finite element analysis software; in this embodiment, the finite element analysis model of the spindle-knife holder is established by using the Hyper Works finite element analysis software.

[0044](2) Check whether the spindle-tool holder finite element analysis model is correct, if it is confirmed, go to step (4), if it is confirmed that there is a difference, go to step (3);

[0045] In this embodiment, step (2) specifically includes the following steps:

[0046] (a) Perform free modal analysis on the finite element analysis model of the spindle-tool holder, and c...

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Abstract

The invention discloses a main shaft-knife handle joint surface nonlinear dynamic characteristic parameter identification method. A main shaft-knife handle joint surface nonlinear dynamic characteristic parameter is identified based on a non-parametric method which is combined with finite element analysis technology. Particularly, a finite element analysis model of a main shaft-knife handle system is firstly set up, nonlinear transient response analysis is performed on the model, and transient response of displacement, speed and accelerated speed at a joint surface is obtained. Time history data of nonlinear contact force at the joint surface are deduced and obtained based on the Newton second law of motion, regression analysis is performed on the sampled data based on a non-parametric method by utilizing a least square method and a Chebyshev polynomial, and an analysis and expression model of radial and tangential non-linear contact force of the main shaft-knife handle joint surface is finally obtained. The non-linear contact force model can be directly applied to dynamics modeling of a main shaft-HSK knife handle system, and necessary conditions for further studying whole dynamic characteristics of the main shaft-HSK knife handle system are provided.

Description

technical field [0001] The invention belongs to the technical field of joint surfaces of mechanical structures, and in particular relates to a method for identifying nonlinear dynamic characteristic parameters of a spindle-knife handle joint surface. Background technique [0002] The spindle-tool holder system is one of the core components of CNC machine tools, and its dynamic characteristics directly affect cutting stability, machining accuracy, surface roughness and production efficiency. In the dynamic analysis of the spindle-tool holder system, the dynamic characteristics of the spindle-tool holder system are usually analyzed by testing and parameter identification to identify the dynamic parameters of the joint surface. The spindle-tool holder combination surface has a very significant impact on the dynamic characteristics of the spindle system, and the linear analysis model is generally used for approximate simulation at present. With the development of machine tool p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
Inventor 刘雪梅李爱平张正旺罗建伟
Owner TONGJI UNIV
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