Modal testing method of CNC machine tool feed system based on built-in sensor

A technology for CNC machine tools and feed systems, which is used in measuring/indicating equipment, metal processing mechanical parts, metal processing equipment, etc., can solve problems such as vibration and adverse effects of machine tool processing accuracy, and achieve low signal-to-noise ratios and improve supervision. The effect of maintaining efficiency and improving test accuracy

Active Publication Date: 2021-12-03
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Abstract
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AI Technical Summary

Problems solved by technology

During the use of the machine tool, affected by the material and structure of the machine tool itself, different degrees of vibration will occur, and long-term vibration will adversely affect the machining accuracy of the machine tool

Method used

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Embodiment Construction

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. 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.

[0016] A modal test method for a feed system of a numerically controlled machine tool based on a built-in sensor, specifically comprising the following steps:

[0017] S1: Establish the dynamic three-dimensional model of the machine tool through the computer, divide the test parts of the machine tool according to the structure, and determine the excitation point and vibration pickup point on each test part, and arrange the vibrator according to the established dynamic model. ...

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Abstract

The invention discloses a modal test method for a feed system of a numerically controlled machine tool based on a built-in sensor, which specifically includes the following steps: S1: Arranging a vibrator at a determined excitation point according to an established dynamic model, and vibrating S2: Collect the vibration response signal at the determined vibration pickup point according to the established dynamic model; S3: Input the excitation signal and the vibration response signal into the data and analysis system for analysis and processing, and obtain the reflected excitation vibration Transfer function for force and vibration response relationship. The invention sends excitation signals to the machine tool many times and collects the vibration response signals, and calculates the average value of the vibration response signals to effectively reduce the phenomenon of low signal-to-noise ratio caused by the test signal being too low or too high, and to improve signal reception. Accuracy, effectively simulate and measure the modal parameters of the machine tool working state, improve the efficiency of supervision and maintenance of the machine tool, and improve the machining accuracy of the machine tool at the same time.

Description

technical field [0001] The invention belongs to the technical field of a modal test method for a feed system of a machine tool, and in particular relates to a modal test method for a feed system of a numerically controlled machine tool based on a built-in sensor. Background technique [0002] CNC machine tool is the abbreviation of numerical control machine tool, which is an automatic machine tool equipped with a program control system. The control system can logically process programs with control codes or other symbolic instructions, decode them, express them in coded numbers, and input them into the numerical control device through the information carrier. After calculation and processing, various control signals are sent by the numerical control device to control the movement of the machine tool, and the parts are automatically processed according to the shape and size required by the drawing. During the use of the machine tool, affected by the material and structure of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q17/00
CPCB23Q17/00
Inventor 吴沁杨建军
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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