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Method for measuring and compensating workpiece clamping inclination and eccentric error in gear measuring center

A technology for gear measurement and workpiece clamping, which is applied in the direction of measuring devices and instruments, and can solve problems such as the influence of tooth shape, pitch, and tooth direction on measurement results

Inactive Publication Date: 2014-03-05
XIAN TECHNOLOGICAL UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in actual measurement, the mandrel of some special workpieces has only one fixed end, which can only be installed by single-end support, and some even have no mandrel, so the workpiece axis has a large inclination and deviation relative to the rotation axis of the gear measurement center during installation. Therefore, it has a direct impact on the measurement results of the tooth shape, pitch, and tooth direction of the workpiece

Method used

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  • Method for measuring and compensating workpiece clamping inclination and eccentric error in gear measuring center
  • Method for measuring and compensating workpiece clamping inclination and eccentric error in gear measuring center
  • Method for measuring and compensating workpiece clamping inclination and eccentric error in gear measuring center

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Embodiment 1

[0049] see figure 2 , the measuring instrument is a gear measuring center, the workpiece mandrel is longer, and the two reference sections of the mandrel can be measured. The specific steps are:

[0050] 1. Carry out zero point correction and gear position correction of the gear measurement center, and establish the measurement coordinate system of the gear measurement center .

[0051] 2. Establish the workpiece coordinate system as , with the measurement coordinate system There is the following relationship between: The angle between O’Y’ and OY is , the angle between O’X’ and OX is ; The distance between the origin O' and O along the OX direction is X0, the distance along the OY direction is Y0, and the projected shape of the workpiece mandrel in the OXY plane is an ellipse;

[0052] 3. Fix the workpiece on the rotary axis table of the gear measurement center, and manually move the probe to the position 1 on the side of the first reference section of the workpiece...

Embodiment 2

[0063] see image 3 , the measuring instrument is a gear measuring center, which can only measure a reference section of the mandrel. The specific steps are:

[0064] 1. Carry out zero point correction and gear position correction of the gear measurement center, and establish the measurement coordinate system of the gear measurement center .

[0065] 2. Establish the workpiece coordinate system as , with the measurement coordinate system There is the following relationship between: The angle between O’Y’ and OY is , the angle between O’X’ and OX is , the distance between the origin O’ and O along the OX direction is X0, the distance along the OY direction is Y0, and the projected shape of the workpiece mandrel in the OXY plane is an ellipse;

[0066] 3. Fix the workpiece on the rotary axis table of the gear measurement center, and manually move the probe to the position 1 on the side of the first reference section of the workpiece mandrel;

[0067] 2. The gear meas...

Embodiment 3

[0077] see Figure 4 , The measuring instrument is a gear measuring center, the mandrel of the workpiece is short, and the mandrel cannot be measured, but the width of the workpiece is large, and the tooth shape or pitch error of the workpiece can be detected in two sections with large differences. The specific steps are:

[0078] 1. Carry out zero point correction and gear position correction of the gear measurement center, and establish the measurement coordinate system of the gear measurement center .

[0079] 2. Establish the workpiece coordinate system as , with the measurement coordinate system There is the following relationship between: The angle between O’Y’ and OY is , the angle between O’X’ and OX is , the distance between the origin O’ and O along the OX direction is X0, and the distance along the OY direction is Y0;

[0080] 3. Use the gear measurement center to automatically measure the tooth shape error or tooth pitch error of the workpiece Za section...

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Abstract

The invention relates to a method for measuring and compensating workpiece clamping inclination and eccentric errors in a gear measuring center. In actual measurement of the gear measuring center, as a mandrel of a special workpiece has only one fixed end, the workpiece axis has large inclination and skewing relative to a rotary axis. The method comprises the following steps: establishing a relationship model of a workpiece coordinate system and a measurement coordinate system, measuring relationship parameter eccentric parameters and inclined angle parameters of the workpiece coordinate system and the measurement coordinate system, calculating the parameters according to two points, measuring a workpiece under the measurement coordinate system of the gear measurement center under the condition that the situation that the workpiece is clamped in an inclined manner is already known, so as to obtain data points of the workpiece in the measurement coordinate system; after coordinate conversion, converting the data points in the measurement coordinate system into the workpiece coordinate system, substituting a workpiece error calculation model so as to obtain compensated measurement result. According to the method, the existing workpiece mandrel or the workpiece is utilized for measurement, and automatic measurement on inclination and eccentric errors and error compensation to the workpiece are achieved through clamping once.

Description

technical field [0001] The invention belongs to the technical field of coordinate measuring machines, and in particular relates to a method for measuring and compensating errors of clamping inclination and eccentricity of workpieces in a gear measuring center. Background technique [0002] The gear measurement center is the crystallization of the integrated application of information technology, computer technology and numerical control technology on gear measuring instruments, and is a milestone in the development of coordinate gear measuring instruments. It is mainly used for the detection of single geometric accuracy of gears, and can also be used for the measurement of the overall error of gears. It has the characteristics of wide measurement range, high precision and high efficiency. [0003] The gear measurement center is essentially a four-coordinate measuring machine with one rotary axis and three linear axes - a cylindrical coordinate measuring machine, which is m...

Claims

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Application Information

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IPC IPC(8): G01B21/00
Inventor 卢春霞王建华劳奇成徐臻张瑜张新华张盟
Owner XIAN TECHNOLOGICAL UNIV
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