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An Accurate Evaluation Method for Installability of Two-section Holes Based on the Principle of Equal Accuracy

A technology of equal precision and installability, applied in the field of computer-aided measurement, which can solve the problems of increased cost, difficult disassembly and assembly, and high cost of high-precision coaxial parts

Active Publication Date: 2020-08-25
柳州鹿寨县唐秦泰测量技术有限公司
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Problems solved by technology

However, the cost increase of this method is significant due to the difficulty of disassembly and assembly of the actual parts
[0007] To sum up, due to the absence of an accurate evaluation method for mountability, the existing technology is costly in solving the assembly problem of high-precision coaxial parts that are difficult to completely interchange

Method used

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  • An Accurate Evaluation Method for Installability of Two-section Holes Based on the Principle of Equal Accuracy
  • An Accurate Evaluation Method for Installability of Two-section Holes Based on the Principle of Equal Accuracy
  • An Accurate Evaluation Method for Installability of Two-section Holes Based on the Principle of Equal Accuracy

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Embodiment Construction

[0065] The following are specific embodiments of the present invention, and the solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

[0066] An accurate evaluation method for the installability of two-section holes based on the principle of equal precision consists of the following steps:

[0067] Step 1, obtain the geometric design parameters and measuring points of the hole parts and pre-determine the adjustment amount of the standard axis.

[0068] The two sections of holes are composed of fine holes and coarse holes, and a section of transition holes is connected between the fine holes and the coarse holes.

[0069] The nominal diameter of the fine hole is 20, the tolerance class is IT 7, and the nominal length is 30; the nominal diameter of the transition hole is 24, and the nominal length is 10; the nominal diameter of the coarse hole is 30, the tolerance ...

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Abstract

The invention relates to the field of computer-aided measurement, and in particular relates to a method for rapidly evaluating the installability of a two-section hole based on an equal-precision principle. The method comprises the steps of: (1), obtaining geometric design parameters and measurement points of a hole part, and pre-setting the upper deviation of a standard shaft; (2), solving fitting diameters and fitting location of each section of hole; (3), pre-excluding a part, which is difficult to assemble, according to a hole shaft diameter difference; and (4), solving the minimum composite clearance between hole shafts by utilizing the fitting geometric parameters of the hole and the geometric parameters of the standard shaft.

Description

technical field [0001] The invention relates to the field of computer-aided measurement, in particular to a method for accurately evaluating the installability of two-segment holes based on mathematical evaluation based on the principle of equal precision. Background technique [0002] The stepped shaft and its mounting holes are widely used in the mechanical field. At present, the hole-shaft matching parts mainly control the minimum clearance (reflecting the assemblability) and the maximum clearance (reflecting the assembly ability) of the hole-shaft fitting by controlling the dimensional tolerance of each section of hole and shaft, and the coaxiality tolerance between the hole and shaft on the same part. accuracy). [0003] If the dimensional and geometric tolerances of the design are appropriate, and the dimensional and geometric errors of the parts are in line with the design tolerances, then the assemblability and assembly accuracy of the parts can be guaranteed. At t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/00G01B21/14G01B21/16G06F30/17
Inventor 唐哲敏
Owner 柳州鹿寨县唐秦泰测量技术有限公司
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