Measurement method of large gear free of installation and regulation

A measuring method and technology for large gears, applied in measuring devices, instruments, etc., can solve the problems of low measurement efficiency of large gears, large measurement errors, and time-consuming adjustment process.

Active Publication Date: 2013-06-12
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned adjustment process is time-consuming and laborious, and it is still difficult to ensure that the reference axis of the measured gear is parallel to the Z-axis of the instrument, and the resulting measurement error greatly affects the accuracy of the measurement results
Therefore, using the traditional electronic generation method to measure large gears has low measurement efficiency and large measurement errors

Method used

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  • Measurement method of large gear free of installation and regulation
  • Measurement method of large gear free of installation and regulation
  • Measurement method of large gear free of installation and regulation

Examples

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Effect test

Embodiment 1

[0024] Such as image 3 As shown, the large gear cannot be positioned and installed with the center, and in this case, the task of measuring the tooth profile error needs to be completed. Using the method of the present invention, the measurement process is carried out according to the following steps:

[0025] 1) Install the measured gear workpiece 1 on the rotating platform 3 without adjusting the position and posture of the measured gear workpiece 1 relative to the measuring instrument 2. At this time, the measured gear 1 is inclined relative to the instrument.

[0026] 2) Measure several points on the reference plane and reference cylindrical surface at the upper end of the measured gear 1 through the measuring instrument 2, and use the plane measurement point to fit the plane through the least square method and obtain the plane normal vector, and use the cylindrical surface to measure the point through the least square Multiplicative fitting obtains the least squares circle ce...

Embodiment 2

[0037] Such as Image 6 As shown, the big gear can be positioned and installed using the upper and lower centers, but the upper and lower centers have different axes. At this time, the measured gear 1 is inclined relative to the instrument. Applying the method of the present invention, the measurement process is carried out according to the following steps:

[0038] 1) Position the measured gear 1 through the upper and lower centers of the measuring instrument 2. Since the top position is fixed, the position and posture of the measured gear 1 relative to the measuring instrument 2 cannot be adjusted after positioning.

[0039] 2) Use measuring instrument 2 to measure several points on the upper and lower reference cylindrical surfaces of the measured gear 1 mandrel respectively, and perform least squares cylindrical fitting on all measuring points to get the gear axis Z 1 Vector. Use measuring instrument 2 to measure any point on the gear tooth surface, through which there is a ver...

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Abstract

The invention discloses a measurement method of a large gear free of installation and regulation, belonging to the field of gear measurement. The size and the weight of the large gear reach a hypernormal degree. According to the conventional measurement method, before measurement, a gear workpiece needs to be regulated and aligned, and time and labor are wasted in the regulation and alignment processes. According to the measurement method disclosed by the invention, a gear workpiece regulation and alignment process is removed, an inclination of a reference axial line of the workpiece relative to a measurement instrument is directly measured, theoretical measurement coordinates of a characteristic point and a characteristic line are measured and corrected through the inclination, and finally, the corrected measurement point coordinates are input into a measurement apparatus program for realizing right measurement sampling of the characteristic point and the characteristic line, and sampling data does not need to be subjected to data compensation, and is directly calculated by adopting the conventional error evaluation method. The measurement method is also suitable for occupations for locating the gear by using centres, and is capable of correcting a gear inclination error caused by misalignment of the upper centre and the lower centre, so that the accuracy of a measurement result is ensured.

Description

Technical field [0001] The invention belongs to the technical field of gear measurement, and specifically relates to a large gear free installation adjustment measurement method. Background technique [0002] Gear measurement is generally divided into: analytical measurement based on tooth pitch, tooth profile and helix measurement; functional measurement based on comprehensive measurement (double-sided, single-sided meshing measurement); single item and comprehensive integration Overall gear error measurement. For large gears, functional measurement and overall error measurement are difficult to implement because the parameters, dimensions, and weight have reached an ultra-conventional level. At present, it is mainly analytical measurement based on tooth profile, helix and pitch measurement. The method is the electronic generation method, and the special measuring instrument is the gear measuring center. The electronic generation method requires that the measured gear axis is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/20
Inventor 石照耀林虎
Owner BEIJING UNIV OF TECH
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