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Straightness adaptive measurement method based on Monte Carlo method

A technology of straightness and reasoning method, which is applied in the direction of measuring/indicating equipment, metal processing machinery parts, metal processing equipment, etc., to achieve the effect of stable method, industrial possibility and easy promotion

Pending Publication Date: 2022-03-29
GUILIN UNIV OF ELECTRONIC TECH
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  • Claims
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Problems solved by technology

[0004] To sum up, there is still a lack of a fast and stable method for inferring the best measurement distance when inspecting cylindrical parts with a given straightness tolerance in any direction.

Method used

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  • Straightness adaptive measurement method based on Monte Carlo method
  • Straightness adaptive measurement method based on Monte Carlo method
  • Straightness adaptive measurement method based on Monte Carlo method

Examples

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Embodiment Construction

[0033] The following is a specific example of the present invention, and the invention is further described with the present invention, but the present invention is not limited to these examples.

[0034] Step 1: According to this particular cutting method, the parts material is 45 steel, the length L is 113mm, the tool material is YT15, calculate the size of the parts when the vehicle cuts, calculates , , a p = 0.2, brought into formulas Get a typical machining error model is convex, the relationship between the length of the part of its busbar, the maximum size error is 0.0129mm, in line with the dimensional tolerance, and some data is shown in Table;

[0035]

[0036] Step 1 After the end, step 2 is performed.

[0037] Step 2: Detecting parts hypothesis K = 50 measurement points, initial cross section I = 60. The instance part satisfies the MMR to give the right direction tolerance and the upper deviation of the dimensional tolerance is equal to zero, and the actual diamete...

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Abstract

The invention belongs to the field of precision measurement and computer application, and relates to an optimal measurement spacing reasoning method for rapidly and stably marking straightness tolerance in any given direction during detection of a cylinder part, which is realized by the following steps of: 1, obtaining a size error morphology change function under a specific processing condition; 2, assuming that K (K is greater than or equal to 3) measuring points exist on the cross section of the cylinder part and I cross sections exist in total, analyzing the size error to compensate the straightness tolerance, and increasing the allowable value of the straightness tolerance so as to obtain a shape change function of an actual part; 3, obtaining a simulation function of the measuring point according to the morphology change function of the part; 4, performing error evaluation to obtain the variation of the average value of the limit equivalent dimensions; 5, if the variation is smaller than 0.001 mm, executing the step 6, otherwise, returning to the step 2; and 6, when the measurement error is greater than or equal to the measurement allowance, outputting the finally obtained optimal cross section number, otherwise, reducing the cross section number and returning to the step 2.

Description

Technical field [0001] The present invention belongs to the field of precision measurement and computer application, involving a rapid and stable labeling of cylindrical part detection of cylindrical part detection of the straight-line tolerance tolerance, and can be used for three-coordinate measuring machine (Coordinate Meas-Uring Machine) , CMM) The part is performed in the device and provides guidance for the improvement of the parts processing and the improvement process. Background technique [0002] Straightness is a more common parameters in the shade tolerance test, which has two specific tolerance types in a given plane and a given direction. In information, digital manufacturing environments, to control the straightness error of the mechanical product, digital precision measurement equipment such as CMM has been widely used in offline, online or in position measurement. For cylindrical parts, since the part has the same curvature radius, the position of the spot is oft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q17/00
CPCB23Q17/00
Inventor 黄美发刘廷伟梁健伟苟国秋
Owner GUILIN UNIV OF ELECTRONIC TECH
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