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Two-dimensional cam part shape digital measurement method based on profile

A measurement method and profile technology, applied in the field of measurement, can solve the problems of production cost and long cycle, little reference value, and low measurement efficiency, and achieve the effect of reducing the machining adjustment cycle, improving measurement efficiency, and improving production efficiency

Active Publication Date: 2019-06-07
XIAN AERO ENGINE CONTROLS
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Problems solved by technology

Among them, the comparison measurement method of standard parts needs to manufacture comparison standard parts and special measurement tooling, the production cost and cycle are longer, and the accuracy is lower; while the measurement result of the cam profile point position measurement method based on the polar coordinate system is a given polar angle The extreme radius deviation of the cam profile is not directly related to the cam profile allowance, and it changes with the curvature of the cam. The greater the curvature of the profile, the more the extreme radius deviation deviates from the actual state of the part allowance. The deviation result The distribution is discrete, the reference significance for machine adjustment is not great, and the measurement efficiency is low

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  • Two-dimensional cam part shape digital measurement method based on profile

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Embodiment Construction

[0028] The present invention establishes a high-precision cam mathematical model, reasonably converts the polar radius measurement tolerance zone into a contour tolerance zone, and uses digital technology to measure the cam profile by using a three-coordinate measuring machine through off-line measurement program + on-line detection. Points to measure the vector direction deviation, so that the measurement conclusion conforms to the real margin of the cam profile, improves the measurement efficiency of the cam profile, reduces the machining adjustment cycle, and achieves the purpose of reducing production costs.

[0029] The technical scheme provided by the present invention will be described in detail below in conjunction with embodiment:

[0030] The contour-based two-dimensional cam type part profile digital measurement method provided by the present invention comprises the following steps:

[0031] 1) Establish a digital measurement model of the two-dimensional cam part pr...

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Abstract

The invention belongs to the field of measurement, and relates to a two-dimensional cam part shape digital measurement method based on profile. The method includes the following steps: (1) establishing a two-dimensional cam part shape digital measurement model; (2) calculating the profile tolerance of the actual surface curve of the shape of the model according to the two-dimensional cam part shape digital measurement model; (3) obtaining a profile measurement result of the actual surface curve of a two-dimensional cam part; and (4) comparing the obtained profile measurement result with the profile tolerance, determining that the two-dimensional cam part product is qualified if the profile measurement result is within the profile tolerance range, and determining that the two-dimensional cam part product is unqualified if the profile measurement result is out of the profile tolerance range. The invention provides a two-dimensional cam part shape digital measurement method based on profile which can improve the measurement efficiency of cam shapes, make the measurement conclusion conform to the real allowance of cam profiles and facilitate rapid and accurate modification of processing procedures.

Description

technical field [0001] The invention belongs to the field of measurement, and relates to a digital measurement method, in particular to a contour-based two-dimensional cam type part surface digital measurement method. Background technique [0002] The general two-dimensional cam profile measurement technology mainly includes two methods: the standard part comparison measurement method and the cam profile point position measurement method based on the polar coordinate system. Among them, the comparison measurement method of standard parts needs to manufacture comparison standard parts and special measurement tooling, the production cost and cycle are longer, and the accuracy is lower; while the measurement result of the cam profile point position measurement method based on the polar coordinate system is a given polar angle The extreme radius deviation of the cam profile is not directly related to the cam profile allowance, and it changes with the curvature of the cam. The gr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/20
Inventor 刘碑刘猛戴彦辰赵攀峰赵涛黑金龙
Owner XIAN AERO ENGINE CONTROLS
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