Parametric Tolerance Judgment Method of Rail Waist Thickness

A judgment method and parameterized technology, applied in the field of steel rolling, can solve the problem of large error of the parameterized tolerance judgment method, and achieve the effect of improving the production rhythm, improving the degree of automation, and reducing the proportion of manual measurement.

Active Publication Date: 2017-07-11
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a parametric tolerance judgment method for the waist thickness of a rail, which solves the problem of large errors in the existing parametric tolerance judgment method for the waist thickness of the scanned section contour of the rail

Method used

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  • Parametric Tolerance Judgment Method of Rail Waist Thickness
  • Parametric Tolerance Judgment Method of Rail Waist Thickness
  • Parametric Tolerance Judgment Method of Rail Waist Thickness

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Embodiment Construction

[0027] This embodiment takes the 60kg / m heavy rail as an example, combined with the attached figure 1 The present invention is further described.

[0028] The parametric tolerance determination method of heavy rail waist thickness includes the following steps:

[0029] Step 1: Calculate the rail bottom fitting straight line of the scanning section profile of the heavy rail

[0030] Firstly, the track bottom point selection area I is established on the bottom of the heavy rail, such as figure 1 , the distance between the left boundary point of the point selection area I of the rail bottom and the left side of the rail bottom of the heavy rail scanning contour is not less than 5mm, and the right boundary point of the point selection area I of the rail bottom is not less than 5mm from the right side of the heavy rail scanning contour rail bottom The distance between sides is not less than 5mm, for example, the value shown in the illustration is 5mm. The distance between the bo...

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Abstract

The invention discloses a steel rail waist thickness parameterized tolerance determination method which solves a problem of large errors caused by a conventional steel rail scan cross section contour thickness parameterized tolerance determination method. The method comprises: selecting n points on a steel rail scan cross section contour rail bottom and fitting a rail bottom fitting straight line equation; translating the rail bottom fitting straight line equation to both sides of a rail waist arc in order that the rail bottom fitting straight line equation intersects with a left rail waist arc and a right rail waist arc so as to form a left abdomen region and a right abdomen region, selecting points in the left abdomen region and the right abdomen region in order to obtain a steel rail waist thickness by computation; comparing the obtained steel rail waist thickness with a steel rail waist thickness standard value and tolerance. The method achieves low errors within 0.07mm, can be implemented by a computer program, and is beneficial to improvement in steel rail detection automation degree, decrease in manual measurement proportion, and increase in rhythm of production.

Description

technical field [0001] The invention relates to the field of steel rolling, in particular to a parameterized tolerance judgment method for rail waist thickness. Background technique [0002] In rail production, rail section specification is an important aspect of its quality. The use of automatic measuring devices, such as the rail section profile measuring instrument, enables the timely and accurate measurement of the profile parameters of the rail section, and obtains a series of coordinates of the profile of the rail section, such as S 1 (x 1 ,y 1 ), S 2 (x 2 ,y 3 ), S 3 (x 3 ,y 3 ), S 4 (x 4 ,y 4 )...These coordinate points form a parametric rail scanning section profile. [0003] The existing method for determining the waist thickness parameters of the rail scanning section contour is to find out the innermost points of the left and right abdomen regions of the rail scanning section contour according to the coordinates of the above scanning points, and then ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/08
CPCG01B21/08
Inventor 陶功明朱华林吕攀峰范红平
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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