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Part-tool system modal test based cutting chatter inhibiting method

A technology of modal testing and parts, which is applied in the direction of metal processing machinery parts, manufacturing tools, metal processing equipment, etc., can solve problems such as low efficiency, and achieve the effect of strong pertinence, obvious effect and high efficiency

Inactive Publication Date: 2019-03-15
BEIJING XINLI MACHINERY
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  • Abstract
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Problems solved by technology

The purpose of the present invention is to use the modal test of the "part-tooling" system to obtain the modal parameters of the "part-tooling" system, and to take chatter suppression technology based on its modal parameters to solve the traditional chatter suppression method The problem of blindness and low efficiency can realize the effective control of the vibration of the workpiece during the entire cutting process

Method used

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  • Part-tool system modal test based cutting chatter inhibiting method
  • Part-tool system modal test based cutting chatter inhibiting method
  • Part-tool system modal test based cutting chatter inhibiting method

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Embodiment Construction

[0026] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0027] Such as figure 1 As shown in , it is a schematic flow chart of a cutting chatter suppression method based on the modal test of the "part-tooling" system. Specifically, it includes the following steps:

[0028] a. Select at least one point on the part as the vibration pickup point, and select at least one point on the part as the excitation point;

[0029] According to the finite element simulation analysis method or the vibration and deformation of the actual cutting, initially identify the weak stiffness or large vibration deformation of the "part-tooling", that is, the area where deformation control and precision control are not easy to guarantee, combined...

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Abstract

The invention discloses a part-tool system modal test based cutting chatter inhibiting method. The part-tool system modal test based cutting chatter inhibiting method comprises the following steps: a,selecting at least one point on a part as a vibration pick-up point, and selecting at least one point on the part as an excitation point; b, clamping and aligning the part on a machine tool, and establishing a part-tool system; c, exciting on the excitation point through a force hammer, obtaining an input signal of the excitation point, and obtaining an output signal of the vibration pick-up point; d, analysing the input signal and the output signal, and obtaining modal parameters of a first-order mode, a second-order mode and a third-order mode; e, fitting vibration modes of the first-ordermode, the second-order mode and the third-order mode, selecting a maximal amplitude value, and setting a vibration inhibiting device at the maximal amplitude value; and f, repeating the steps a-c, andcomparing a frequency-response function of a part which is not subjected to vibration inhibition with a frequency-response function of a part which is subjected to vibration inhibition.

Description

technical field [0001] The invention relates to the field of cutting chatter suppression methods for thin-walled parts, in particular to a cutting chatter suppression method based on the modal test of a "part-tooling" system. Background technique [0002] Cutting chatter in the process of mechanical manufacturing has become an important factor affecting product quality; it will cause vibration marks on the surface of the workpiece, deteriorate the surface quality of the workpiece, affect the performance of mechanical parts, and even produce waste products and aggravate cutting tools in severe cases. The wear and tear of each component of the machine tool cutting system will be subjected to large alternating loads, and the connection characteristics of the machine tool will be damaged. In order to avoid or reduce cutting chatter, sometimes the amount of cutting has to be reduced, so that the working performance of the machine tool and the cutting tool cannot be fully utilized...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q11/00
CPCB23Q11/0039
Inventor 侯劲松张彦琳
Owner BEIJING XINLI MACHINERY
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