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Heavy rail abdominal cavity parameterization tolerance judging method

A judging method and parameterized technology, applied in the field of steel rolling, can solve the problems of inaccurate judging of abdominal cavity parameters of re-scanning section contours, inaccurate judging methods, etc.

Active Publication Date: 2015-04-22
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a parameterized tolerance determination method for the abdominal cavity of heavy rail, which solves the problem that the existing heavy rail scanning section profile abdominal cavity parameter determination method is inaccurate and cannot accurately determine the rescanning section profile abdominal cavity parameter

Method used

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  • Heavy rail abdominal cavity parameterization tolerance judging method
  • Heavy rail abdominal cavity parameterization tolerance judging method
  • Heavy rail abdominal cavity parameterization tolerance judging method

Examples

Experimental program
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Effect test

no. 1 example

[0082] Such as figure 1 As shown in , set the horizontal axis of each scanning point of the standard cross-section profile of the heavy rail as a horizontal line, and the horizontal direction to the right is positive. The waist rail arc of the standard section profile of the heavy rail is where C b and D b are the two endpoints of the rail waist arc, A b (x Ab ,y Ab ) is the midpoint of the waist rail arc of the standard section profile of the heavy rail, C b and D b Along the rail waist arc respectively to A b After the point is offset by h=5.00mm in the direction of the longitudinal axis, C′ can be obtained respectively on the circular arc of the waist rail of the standard section profile of the heavy rail b (x C′b ,y C′b ) and D' b (x D′b ,y D′b ) two points, remember t 1 =(x C′b +x D′b ) / 2-x Ab , for 60kg / m heavy rail, at this time t 1 is a fixed value.

[0083] P 1b (x P1b ,y P1b ) and P 2b (x P2b ,y P2b ), the arc center A of the rail waist b w...

no. 2 example

[0137] In combination with the above description of the standard profile of the heavy rail section, the steps of the second embodiment are as follows:

[0138] Step 1: Determine the benchmark

[0139] 1. If Figure 4 , find the point K(x K ,y K ), where x K It is the minimum value of the abscissa of all points on the arc of the rail waist; find the y coordinate on the slant line of the lower jaw of the rail head to find the profile of the heavy rail scanning section K +y 1b / 2+y 2b / 2 point M′(x M′ ,y M′ ), find the vertical coordinate on the oblique line on the rail leg of the scanning section profile of the heavy rail is x K +y 3b / 2+y 4b / 2 point N′(x N′ ,y N′ ); find the ordinate on the rail waist arc of the heavy rail scanning section contour as (y M′ +y N′ ) / 2+d point A(x A ,y A ).

[0140] Among them, y 1b 、y 2b 、y 3b 、y 4b The meanings represented by , d are the same as those in the first embodiment. Such as Figure 4 As shown, M' is P' on the pr...

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Abstract

The invention discloses a heavy rail abdominal cavity parameterization tolerance judging method and relates to the field of steel rolling. The heavy rail abdominal cavity parameterization tolerance judging method solves the problem that an existing judging method cannot be used for accurately judging heavy rail scanning fracture surface outline abdominal cavity parameters. The heavy rail abdominal cavity parameterization tolerance judging method comprises the steps that datum points are determined, scanning points on a lower jaw oblique line of a heavy rail scanning fracture surface outline rail head and scanning points on an upper oblique line of a rail leg are rotated and corrected, a linear equation of the lower jaw oblique line of a heavy rail standard fracture surface outline rail head is established, the corresponding scanning points are substituted into the linear equation to be calculated, a standard linear equation of the upper oblique line of a heavy rail standard fracture surface outline rail leg is established, the corresponding scanning points are substituted into the standard linear equation to be calculated, and lastly heavy rail scanning fracture surface outline abdominal cavity parameterization tolerance judging is carried out through comprehensive comparison. According to the method, errors are small, the judging result is close to a sample plate measuring result, and an effective basis is provided for rolling adjusting and lower steel rail line judging; moreover, the method can be achieved through a computer program, so the automation degree of heavy rail detecting can be improved, the manual measuring proportion is lowered, and the rhythm of production is improved.

Description

technical field [0001] The invention relates to the field of steel rolling, in particular to a parameterized tolerance judgment method for the abdominal cavity of the scanning profile of heavy rails. Background technique [0002] In rail production, heavy rail section specification is an important aspect of its quality. The use of automatic measuring devices, such as rail profile measuring instruments, enables timely and accurate measurement of heavy rail profile parameters, and obtains a series of coordinates of rail profile, 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 the parametric profile of the rail section. [0003] The existing method for determining the abdominal cavity parameters of the heavy rail section profile is not accurate enough, and the calculation results have large errors. Due to the complex profile of the heavy rail section profile, many curves, many profile changes, and high precis...

Claims

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Application Information

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IPC IPC(8): G01B21/20
CPCG01B21/20
Inventor 朱华林陶功明吕攀峰范红平
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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