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Measured element inspection tolerance zone calculation method with dual-diameter element reference combination conforming to tolerance related requirements under three-reference system

A benchmark system, double-diameter technology, applied in the direction of calculation, image data processing, special data processing applications, etc., can solve the problem of no general calculation method and calculation formula, etc., to achieve the calculation method is easy to understand, good universality, calculation The effect of simple method

Active Publication Date: 2018-11-30
HANGZHOU DIANZI UNIV
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Problems solved by technology

Few literatures discuss the calculation method of transfer tolerance, but it is only limited to the case where a single datum complies with the relevant requirements, and there is no general calculation method and formula for the transfer tolerance calculation of multiple datums complying with the tolerance-related requirements

Method used

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  • Measured element inspection tolerance zone calculation method with dual-diameter element reference combination conforming to tolerance related requirements under three-reference system
  • Measured element inspection tolerance zone calculation method with dual-diameter element reference combination conforming to tolerance related requirements under three-reference system
  • Measured element inspection tolerance zone calculation method with dual-diameter element reference combination conforming to tolerance related requirements under three-reference system

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Embodiment Construction

[0051] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0052] The method for calculating the inspection tolerance zone of the measured element according to the present invention comprises the following steps:

[0053] S1, establish D_DFS and M_DFS for all datum elements respectively; all datum elements are composed of a plane element and two diameter elements, and when the diameter element is a cylindrical element, its axis is perpendicular to the plane element, and the two diameter elements follow the tolerance Related requirements, planar features do not follow tolerance related requirements.

[0054] For a given actual part, D_DFS and M_DFS are respectively established for all datum elements according to the shape of the tolerance zone of the measured element, the form ...

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Abstract

The invention provides a measured element inspection tolerance zone calculation method with the dual-diameter element reference combination conforming to tolerance related requirements under a three-reference system. The method comprises the steps that S1, a D_DFS and an M_DFS are built for all reference elements; all reference elements are composed of one plane element and two diameter elements;S2, according to the D_DFS, a design coordinate system is built, and a measurement coordinate system is built according to the M_DFS; S3, according to relative motion existing after the D_DFS component and the M_DFS component are assembled, a relative motion relation between the design coordinate system and the measurement coordinate system is built so as to define a transfer tolerance and a measured element inspection tolerance zone; S4, a series combination of a parallelogram mechanism and a swing rod mechanism is adopted for representing the maximum relative motion relation of the design coordinate system relative to the measurement coordinate system so as to calculate the dual-diameter element inspection tolerance zone; the length of a crank is the smaller one of the differences between the radiuses of two broken circles and corresponding solid circles. The method is applicable to calculating the transfer tolerance with multiple references conforming to the tolerance related requirements and has the high theoretical significance and using value.

Description

technical field [0001] The invention belongs to the technical field of application of tolerance principles, and in particular relates to a method for calculating a tolerance range of a measured element inspection in which a combination of double-diameter element references under a three-reference system complies with tolerance-related requirements. Background technique [0002] The tolerance principle is the principle that should be followed to determine the relationship between the dimensional tolerance and geometric tolerance of the measured element. The tolerance principle includes the independent principle and related requirements. The independent principle refers to the tolerance requirement that the dimensional tolerance and geometric tolerance of the measured element have nothing to do with each other. Refers to the tolerance requirements that the dimensional tolerance and geometric tolerance of the measured element are related to each other. Tolerance-related require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06T7/62
CPCG06T7/62G06F30/17
Inventor 吴玉光王伟
Owner HANGZHOU DIANZI UNIV
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