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Tooth profile measuring method of numerical control gear grinding machine on-machine measuring system

A measurement system and measurement method technology, which is applied in the field of machining, can solve the problems of the influence of the measurement error of the on-machine measurement system, the low precision of the machine tool, and low precision, so as to improve the qualification rate of gears, accurate measurement results, and facilitate reprocessing. Effect

Active Publication Date: 2016-07-20
CHONGQING UNIV
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Problems solved by technology

However, because the on-machine measurement system utilizes the CNC moving parts of the gear grinding machine, its measurement accuracy is limited by the geometric error of the gear grinding machine and the worse working conditions than the off-line measurement center, resulting in lower accuracy of the on-machine measurement system compared to the off-line measurement system
[0003] At present, there is still a gap in the precision of gear grinding machines independently developed in my country compared with foreign countries, and the low precision of machine tools has a great impact on the measurement error of the on-machine measurement system

Method used

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  • Tooth profile measuring method of numerical control gear grinding machine on-machine measuring system
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  • Tooth profile measuring method of numerical control gear grinding machine on-machine measuring system

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Embodiment Construction

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0037] Such as Figure 1 to Figure 7 As shown, in the specific implementation, the on-machine measurement system is used to measure the standard gear corresponding to the gear to be measured, and the error value at each measuring point is determined when the on-machine measurement system measures the tooth profile of the standard gear. The specific steps are as follows:

[0038] 1. Positioning probe coordinates

[0039] Such as figure 1 As shown, when measuring the tooth profile of the standard gear, the projection of the common normal of the tooth surface and the spherical surface of the probe on the end surface is the normal of the involute line of the end surface, and the radius of the gear base circle is r b , the probe radius is r k , the helix angle of the standard gear is β b , the spread angle at any measuring point on the standard gear tooth prof...

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Abstract

The invention discloses a tooth profile measuring method of a numerical control gear grinding machine on-machine measuring system. The tooth profile measuring method is characterized by comprising the following steps that firstly, a measuring error compensation model is established, wherein before gear grinding is carried out, the on-machine measuring system is adopted for measuring a standard gear corresponding to a gear to be measured, error values, at measuring points of the tooth profile of the standard gear, of the on-machine measuring system are obtained and converted into compensation values of the on-machine measuring system, and the measuring error compensation model is established; secondly, when measurement is performed on a working area of a gear workpiece, the compensation values in the measuring error compensation model are used for compensating for measuring values of the measuring points, and a measuring result of the tooth profile of the gear to be measured is obtained. The tooth profile measuring method has the advantages that compensation to measurement can be achieved according to measuring errors, the on-machine measuring precision is improved, and the qualified rate of gears can be easily increased.

Description

technical field [0001] The invention relates to the technical field of machining, in particular to a tooth profile measurement method of an on-machine measurement system of a numerically controlled gear grinding machine. Background technique [0002] CNC gear grinding machine is the main equipment for gear finishing, and it is used more and more in the field of gear processing. At present, my country's middle and low-grade CNC gear grinding machines have basically replaced similar foreign products, but there is still a large gap between high-end CNC gear grinding machines and foreign advanced levels, and there is a serious technical blockade in the design and manufacture of high-end CNC gear grinding machines. On-machine measurement of gears means that after the gears are machined on the machine tool, the geometric accuracy is measured directly. On the one hand, it avoids the large amount of time required to remove the gears from the machine tool and take them to the measure...

Claims

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Application Information

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IPC IPC(8): G01B21/20
CPCG01B21/20
Inventor 李国龙钟映寰王时龙廖琳钟金童
Owner CHONGQING UNIV
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