Another Accurate Determination Method of Evaluation Area Boundary Point in Gear Overall Error Measurement
An overall error and gear technology, which is applied in the field of precision testing technology and instruments, can solve the problem of insufficient precision measurement of gears with the determination of the starting point of the involute
Active Publication Date: 2017-09-01
BEIJING UNIV OF TECH
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But from the point of view of the use effect, the determination accuracy of the involute starting point of these traditional methods is not enough for the precise measurement of gears
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[0031] The present invention will be further described below in conjunction with accompanying drawing:
[0032] figure 1 It is the formation process and components of the overall error unit curve. The figure also illustrates a method of obtaining the theoretical unit curve of the overall error, that is, the analysis process of the plane rack meshing method.
[0033] figure 2 is the measured overall error curve. image 3 for figure 2 Part of , which marked the pitch angle of the tested gear and the range of a unit curve.
[0034] exist figure 2 In the measured overall error curve shown, it can be seen that there is an eccentric error in the measured gear, and the eccentric error will affect the shape of the overall error unit curve.
[0035] Figure 4 Shown is the overall error curve after high-pass filtering in "step 1", the cut-off wavelength of the high-pass filter is 1 times the pitch angle of the gear under test. Depend on Figure 4 It can be seen that the ecce...
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Another accurate method for determining the boundary point of the evaluation area in the measurement of the overall error of the gear, because the same error value has a great influence on the shape of the involute stage of the unit curve, but has little effect on the meshing and meshing stages, so this paper In the invention, when determining the origin of the unit curve, the data of the two transition stages of the meshing-in section and the meshing-out section are mainly used. Draw a horizontal straight line on the processed measured overall error unit curve, and take the distance from the highest point of the unit as a bias constant as the initial position of the straight line; starting from the obtained initial position, the straight line at the optimized target position is in line with the measured unit The distance between two intersecting points of the curve is also constant; finally, the origin of the overall error unit curve is accurately obtained, thereby accurately determining the evaluation area boundary point of the overall error unit curve.
Description
technical field [0001] The invention relates to a method for accurately determining the boundary point of an evaluation area on a gear overall error measurement curve, and belongs to the field of precision testing technology and instrument technology. Background technique [0002] The overall error measurement technology of gears was pioneered by Chinese scientific and technological personnel in the early 1970s. This technology can extract the individual errors and comprehensive errors of gears from the overall error curve of gears, and solves how to obtain all gears on one gear measuring instrument. The problem of misinformation. The overall gear error measurement method is also called the motion geometry measurement method of the transmission element. Its basic idea is to use the measured gear as a rigid transmission element and obtain The error of the gear under test. The gear precision measuring instruments based on the gear overall error measurement technology indepen...
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IPC IPC(8): G01M13/02
Inventor 石照耀王笑一
Owner BEIJING UNIV OF TECH