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Rotating shaft geometric error identification method commonly used for five-axis numerical control machine tool

A technology of geometric error and CNC machine tools, which is applied to metal processing machinery parts, measuring/indicating equipment, metal processing equipment, etc., can solve problems such as not considering the influence of translational axis errors, and achieve good measurement integrity and high measurement accuracy , The effect of high recognition accuracy

Inactive Publication Date: 2014-06-25
ZHEJIANG UNIV
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Problems solved by technology

However, this method does not consider the influence of translational axis errors

Method used

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  • Rotating shaft geometric error identification method commonly used for five-axis numerical control machine tool
  • Rotating shaft geometric error identification method commonly used for five-axis numerical control machine tool
  • Rotating shaft geometric error identification method commonly used for five-axis numerical control machine tool

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0045] attached Figure 6 Shown is the flow chart of the method for identifying the geometric error of the universal rotary axis of the five-axis CNC machine tool of the present invention, with the attached figure 1 Shown is a schematic diagram of a CAFYXZ five-axis CNC machine tool, taking this machine tool as an example to illustrate the identification method of the rotary axis.

[0046] Step 1. According to the type of five-axis CNC machine tool, use the tracking function of the five-axis CNC machine tool to determine three installation modes for ballbar measurement:

[0047] Step 1.1. Determine that the two rotation axes of the five-axis CNC machine tool are A-axis and C-axis. In order to ensure that the ballbar is stationary relative to the measured rotation axis during ballbar measurement, use the tracking function of the machine tool t...

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Abstract

The invention discloses a rotating shaft geometric error identification method commonly used for a five-axis numerical control machine tool. The method comprises the steps that according to the type of the five-axis numerical control machine tool, a ball rod instrument measuring mode is determined; according to a numerical control machine tool geometric error model, a ball rod instrument sensitive vector is used for obtaining a ball rod instrument reading model; according to the ball rod instrument reading model, the ball rod instrument measuring mode, the property of a geometric error item and a horizontal moving shaft geometric error item, a machine tool rotating shaft geometric error item expression is obtained; proper mounting parameters are selected, the machine tool is operated, and corresponding ball rod instrument reading is obtained; and three horizontal shaft geometric error items of the five-axis numerical control machine tool are input, and according to the rotating shaft geometric error item expression and the ball rod instrument reading, 16 items of geometric errors of two rotating shafts of the five-axis numerical control machine tool are obtained. The method is suitable for different types of five-axis numerical control machine tools, all the 16 items of geometric errors of the two rotating shafts of the machine tool can be obtained, meanwhile, mounting is easy, measuring time is short, the identifying results accord with the property of the geometric error items, and measuring accuracy is high.

Description

technical field [0001] The invention relates to the field of error identification of five-axis numerically controlled machine tools, in particular to a method for identifying geometric errors of rotating axes common to five-axis numerically controlled machine tools. Background technique [0002] As the processing and manufacturing industry has higher and higher requirements for precision and efficiency, five-axis CNC machine tools are becoming more and more important in the manufacturing field. Generally speaking, five-axis CNC machine tools contain two rotary axes and three linear axes. These two rotary axes can provide rotary motion to adjust the tool attitude to reduce the number of workpiece setups. The rotating axis makes the five-axis CNC machine tool have the advantages of high stock removal rate, high surface accuracy and less processing time. However, the rotary axis also introduces a lot of error terms, which makes the error modeling and error compensation of the...

Claims

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Application Information

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IPC IPC(8): B23Q17/00
CPCB23Q17/00
Inventor 傅建中付国强贺永林志伟赖金涛
Owner ZHEJIANG UNIV
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