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Ball screw grinding chatter stability limit graph determining method

A technology for grinding chatter and ball screw, which is applied in grinding/polishing equipment, grinding machines, metal processing equipment, etc., and can solve problems such as difficulty in accurately determining the parameters of grinding dynamics models

Inactive Publication Date: 2011-01-05
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
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Problems solved by technology

According to this situation, the present invention proposes an experimental design method for accurately determining the parameters of the grinding dynamics model. This method solves the technical problem that the parameters of the grinding dynamics model are difficult to accurately determine. sex limit map

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  • Ball screw grinding chatter stability limit graph determining method
  • Ball screw grinding chatter stability limit graph determining method
  • Ball screw grinding chatter stability limit graph determining method

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0041] The method for determining the chatter stability limit diagram of ball screw grinding of the present invention includes the following steps: one is to establish a dynamic model of the grinding process through an experimental method; The chatter stability limit diagram; the third is to determine the grinding process parameters to ensure the stability of the grinding process according to the grinding chatter stability limit diagram.

[0042] Concrete method of the present invention:

[0043] 1. Method of establishing grinding dynamics model

[0044] Such as figure 1 As shown, during the ball screw grinding process, the top end of the tailstock 13 of the machine tool supports one end of the ball screw 11, the top end of the headstock 10 supports and fixes the other end of the ball screw 11, and the motor drives the ball screw 11 to rotate to adjus...

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Abstract

The invention relates to a ball screw grinding chatter stability limit graph determining method, comprising the steps: 1) establishing a dynamics model of a grinding process via an experimental method; 2) according to the stability criterion of cybernetics, determining a grinding chatter stability limit graph; and 3) according to the grinding chatter stability limit graph, determining the parameters of the grinding technique for ensuring the grinding stability. The invention mainly aims at solving the chatter inhibition problem of a numerical control thread grinder in the grinding process of a ball screw, adopts the experimental design method to accurately identify the parameters of the grinding dynamics model, determines the grinding chatter stability limit graph according to the parameters, and provides the parameters of the grinding technique to ensure the grinding stability, thereby effectively solving the chatter inhibition problem in grinding process. The curve can be used to determine the parameters of the grinding technique, namely the abrasion wheel main shaft speed n and the grinding depth h to avoid flutter, thus the invention can improve the grinding quality and efficiency of the ball screw.

Description

technical field [0001] The invention relates to a method for analyzing the chatter stability of ball screw rod grinding, in particular to a method for accurately judging the chatter stability of ball screw rod grinding by using a limit diagram. Background technique [0002] Grinding is the last process in the processing of ball screw. The flutter phenomenon caused by unstable grinding during the grinding process is one of the important factors affecting the surface quality of the workpiece. Generally, there are two ways to suppress the grinding chatter phenomenon. One is to measure the signals (such as acoustic emission signals, etc.) when chatter occurs and when no chatter occurs during the grinding process of the ball screw. The pattern recognition theory establishes the discriminant formula of the grinding chatter phenomenon, and controls the grinding process parameters according to the discriminant formula to avoid the chatter phenomenon; the other is to establish a grin...

Claims

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Application Information

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IPC IPC(8): B24B19/00
Inventor 李郝林迟玉伦
Owner UNIV OF SHANGHAI FOR SCI & TECH
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