Large gear measurement method based on articulated arm measurement machine

A measurement method and articulating arm technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of difficult manufacturing and assembly of instruments, high requirements for the aiming and positioning accuracy of measuring instruments, and increased measurement errors, so as to achieve economical precision and improve measurement efficiency Effect

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

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Problems solved by technology

[0006] Using the traditional electronic generation method to measure large gears has the following disadvantages: 1) The specific trajectory formed by the generation system must be strictly controlled within the set measurement surface (end plane or indexing cylindrical surface), so the aiming and positioning of the measuring instrument High precision requirements
However, the size of the large gear is large, and the structure and volume of the measuring instrument increase accordingly, which brings great difficulties to the manufacture and assembly of the instrument; 2) Using a rotating platform to measure the large gear, the weight of the gear adds a lot of force to the rotating shaft, resulting in the geometry of the instrument. Deformation; and the gear ine

Method used

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  • Large gear measurement method based on articulated arm measurement machine
  • Large gear measurement method based on articulated arm measurement machine
  • Large gear measurement method based on articulated arm measurement machine

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Example Embodiment

[0048] This embodiment will be further described below in conjunction with the drawings:

[0049] 1) Install the fixed joint arm coordinate measuring machine

[0050] Such as figure 1 As shown, the big gear 1 to be tested is installed on the machine tool slewing support platform 4, and the articulated arm measuring machine 2 is placed next to the big gear processing machine tool. The measuring system is composed of the articulated arm measuring coordinate machine 2 and the computer 3. The computer 3 is equipped with special measuring software for the measuring machine.

[0051] 2) Use articulated arm coordinate measuring machine to establish gear coordinate system

[0052] Such as figure 2 As shown, the articulated arm measuring machine 2 is used to collect several points on the outer circle of the gear mandrel, the design reference of the large gear workpiece 1, and the coordinate values ​​of the measuring points can be fitted by the least square method to obtain a least square circ...

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Abstract

The invention provides a large gear measurement method based on an articulated arm measurement machine, belonging to the technical field of gear measurement. An articulated arm coordinate measurement machine is arranged beside a machine tool to perform field measurement on a machined gear on the machine tool; through the articulated arm coordinate measurement machine, a position relationship between a measured gear workpiece and a measurement instrument can be established; after a probe of the measurement instrument is adopted to uniformly sample on the gear surface, a gear surface initial angle parameter corresponding to each measurement point of the actual gear surface is obtained, and the gear surface gear shape error is obtained through calculation. As a revolving platform of the machine tool is adopted to drive the gear workpiece to perform revolving or as the position of the articulated arm coordinate measurement machine is moved, the measurement of gears in different positions of the large gear can be realized.

Description

technical field [0001] The invention relates to a method for measuring large gears based on an articulated arm measuring coordinate machine. The method is simple and efficient, and is particularly suitable for on-machine measurement of large gears. It belongs to the field of precision testing technology and precision instruments. Background technique [0002] Large gears refer to gears with a diameter greater than 500mm, which are key components of large equipment. For large gears, due to the large parameters, size and weight, analytical measurement based on tooth profile, helix and tooth pitch measurement is mainly based on the electronic generation method. [0003] Electronic generation measurement refers to the formation of a specific trajectory curve (helix, tooth profile, etc.) ), the trajectory curve is compared with the actual characteristic line of the measured gear to determine the corresponding error. [0004] The instruments for measuring based on the electroni...

Claims

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Application Information

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IPC IPC(8): G01B21/20
CPCG01B5/008G01B5/202
Inventor 石照耀林虎
Owner BEIJING UNIV OF TECH
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