Wheel rotary cutting method of rail wagon

A railway freight car and wheel technology, applied in the field of railway freight car wheel turning, can solve the problems of scrapped wheels, improper selection and processing, and reduced service life of wheel sets, so as to avoid excessive cutting, reduce repair costs and improve repair rate.

Active Publication Date: 2012-07-18
CRRC YANGTZE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One is that for wheels whose rim thickness is close to the lower limit, due to the operator’s lack of personal experience and improper selection of processing volume, it is easy to cause the wheels to be scrapped; Excessive feed, artificial excessive cutting, so that the service life of the wheel set will drop sharply (for example, during the processing of the wheel, if the wheel is cut by 1mm less in the diameter direction, the wheel set can run 100,000 kilometers more)

Method used

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  • Wheel rotary cutting method of rail wagon
  • Wheel rotary cutting method of rail wagon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] A method for turning wheels of railway wagons, comprising the following steps:

[0025] Step 1. For the wheel set that needs to be economically cut, use laser to measure and scan the shape of the wheel set tread from the 1:8 straight line to the vertex of the rim or the entire rim to obtain the profile curve of the wheel set tread, so as to calculate the wear wheel The thickness of the rim and the size of the wheel diameter; the specific method for calculating the thickness of the worn rim and the size of the wheel diameter is: the laser measures the tread surface of the wheel set to obtain the coordinates of the discrete point data, and the orthogonal polynomial curve fitting is performed on these discrete point data by mathematical methods. Filter out the non-points in the measurement to get a smooth wheel-tread profile curve; get the Y-coordinate value of the X-axis -70 coordinate from this smooth wheel-tread profile curve, which is the current wheel diameter size; an...

Embodiment 2

[0030] Process the standard curve with the smallest processing amount at the circumference of the wheel diameter, and the specific steps for calculating the processing amount are as follows:

[0031] Step 2c, obtain the rim thickness of the current wheel set, the wear and peeling degree of the circumference of the wheel diameter, and the degree of black skin on the outer side of the wheel rim and the tread part according to the iron standard, and prevent damage to the machine tool due to the small amount of processing. Hard damage parameters;

[0032] Step 2d, according to the rim thickness of the current wheel set obtained in step 2c, the wear and peeling degree of the circumference of the wheel diameter, and the parameters of the degree of black skin allowed to be left on the outer side of the wheel rim and the tread part according to the iron standard, and to prevent due to the amount of processing When the hard damage parameters of the machine tool are small, select a stan...

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Abstract

The invention relates to a wheel rotary cutting method of a rail wagon. Firstly a wheel set tread shape of a wheel set needing economic cutting is measured and scanned from a 1:8 straight line portion to a flange peak portion or the whole flange, an appearance curve of a wheel set tread is obtained, abrasion flange thickness and wheel diameter size are obtained through calculation. Therefore, thewheel rotary cutting method of the rail wagon has the advantages of achieving accuracy of machining parameters of the wheel set tread, avoiding excessive cutting, using old wheel to the greatest extend, improving wheel set repairing rate and reducing car repairing cost.

Description

technical field [0001] The invention relates to a turning method, in particular to a method for turning a railway wagon wheel. Background technique [0002] The heavy-duty speed-up of railway freight cars has higher and higher requirements for axle maintenance, resulting in a significant increase in factory axle maintenance costs. First, the weight-reducing wheels that were widely loaded and used in the past few years to cooperate with the speed increase have entered the factory maintenance period one after another. The rim thickness of the weight-reducing wheels was reduced by 15mm compared with the original ordinary wheels when the rim thickness was designed, and the service life was significantly shortened; The second is that the wear and tear of the wheels and the generation of defects are increased when the vehicle is running at high speed under heavy load. The above-mentioned reasons lead to a sharp increase in the scrap rate of wheels, and the replacement of new whee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/08
Inventor 乐汉琴张厚胜郑志坚左云清
Owner CRRC YANGTZE CO LTD
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