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Online indirect measuring method for rotation precision of machine tool main shaft

A technology of rotation accuracy and machine tool spindle, which is applied in the direction of measuring/indicating equipment, metal processing machinery parts, metal processing equipment, etc., can solve the problems of poor economy, inability to truly reflect the rotation accuracy of machine tool spindle, complicated use, etc., and achieve applicable Wide range, accurate prediction of workpiece machining accuracy, and easy installation

Inactive Publication Date: 2020-12-11
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of measurement method needs to design a special tool or use a special sensor for measurement, which is complicated to use and poor in economy, and this type of method cannot truly reflect the rotation accuracy of the machine tool spindle in the cutting state

Method used

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  • Online indirect measuring method for rotation precision of machine tool main shaft
  • Online indirect measuring method for rotation precision of machine tool main shaft
  • Online indirect measuring method for rotation precision of machine tool main shaft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Such as image 3 As shown, the placement position of the three-way sensor is under the processing conditions on the bearing shell (processing parameters are: speed: 5400rpm / min, depth of cut 2mm, feed rate per tooth 0.015mm / z, workpiece material selection 100*150*35 The vibration acceleration of the front end of the electric spindle is based on the aerospace aluminum alloy, the tool is a 2-tooth high-speed steel end mill, and the processing method is groove processing without cutting fluid.

[0099] Establish the vibration transmission model of the machining spindle, and determine the values ​​of each parameter in formula 1: the fitting stiffness of the bearing is 7.6×10 7 N / m; base stiffness is 3.5×10 9 N / m. Such as Figure 4a and Figure 4b shown.

[0100] Put the obtained vibration signal of the vibration pickup point of the casing and the determined parameters into formulas 1 to 6 to obtain the vibration signal of the main shaft.

[0101] After the spindle vib...

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Abstract

The invention discloses an online indirect measuring method for rotation precision of a machine tool main shaft, and belongs to the technical field of machining. The method comprises the following steps: establishing a transmission mechanical model of vibration between a measuring point on a main shaft solid joint part and a main shaft to obtain a main shaft acceleration signal; deriving a main shaft displacement signal through an integration method, and drawing a radial axis trajectory chart and an axial axis trajectory chart of the main shaft; and performing precision assessment on a trajectory of the radial axis trajectory chart and the axial axis trajectory chart. The method for measuring the rotation precision of the machine tool main shaft under a measuring processing state providedcan obtain axial and radial absolute displacement of the main shaft, has the advantages of being accurate in measurement, wide in range of application, easy in mounting, and the like, and is of greatsignificance in predication on processing precision of the machine tool, assessment on dynamic performance of the machine tool, and online pre-warning of the machine tool.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to an on-line indirect measurement method for the rotation accuracy of a machine tool spindle. Background technique [0002] Manufacturing industry is a basic and pillar industry to measure a country's production capacity, national economic level and comprehensive national strength. my country is already a big manufacturing country, and CNC equipment plays an important role in the development of the national economy. With the rapid development of my country's national economy, the number of domestic CNC machine tools is also increasing, and the application in our country is becoming more and more common. , has become the key equipment for enterprises to ensure product quality and improve production efficiency. At present, the highest machining accuracy of domestic machine tools reaches 0.002mm, and the highest machining accuracy of foreign-produced machine ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q17/00B23Q17/12
CPCB23Q17/00B23Q17/12
Inventor 刘成颖郑烽王立平
Owner TSINGHUA UNIV
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