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Steel rail milling-cutting process

A rail and milling technology, applied in the track field, can solve the problems of high measurement times, low production efficiency, and low utilization rate of machine tool value, and achieve the effects of quality control, manpower saving, and service life improvement

Inactive Publication Date: 2018-01-16
HUBEI WUTIESHANQIAO TRACK EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ordinary gantry milling machine (the value of the machine tool is 1.2 million yuan), when milling, the production capacity is 2 people. Due to the thermal deformation affecting the thickness of one milling, it is necessary to mill 3~4 times on the left and right sides respectively, and the production capacity in a single shift is 6~7. , low production efficiency; CNC milling machine (the value of the machine tool is 10 million yuan), when milling, the production capacity is 2 people, the number of measurements is large, the output per shift is about 10 pieces, and the value utilization rate of the machine tool unit is low

Method used

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  • Steel rail milling-cutting process

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Embodiment Construction

[0032] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further explained through specific examples. It should be understood that the examples described herein are only for explanation of the present invention and are not intended to limit protection scope of the present invention.

[0033] Such as figure 1 Shown, a kind of rail milling process of the present invention comprises the following steps:

[0034] (1) Heat treatment: Put the die forging heel of AT rail into the furnace for heating, heat it to 970°C, and then blow it out for quenching, the wind pressure is above 0.4MPa, and the time is 180S, and then perform air cooling treatment to obtain a non-standard die forging heel ;

[0035] (2) One-time top adjustment at the heel end: ensure the straightness of the rail parent material and the die forging heel end;

[0036] (3) Cutting: Cut off the predetermined heel end of the non-standard die...

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Abstract

The invention discloses a steel rail milling-cutting process and belongs to the technical field of tracks. The steel rail milling-cutting process mainly comprises the following steps of heat treatment, primary abutting adjustment of a root end, blanking, secondary abutting adjustment of the root end, rail bottom plane milling and cutting, rail head margin milling and cutting. The steel rail milling-cutting process only needs one production worker, labor is saved, the unit value device utilization rate is high, one-shift yield is high, the unit product device input is greatly reduced, and theproduction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of rails, in particular to a rail milling process. Background technique [0002] At present, the heels of AT rails for railway turnouts are processed into standard rails through forging, quenching and other processes. In the prior art, the oxide skin on the surface of the point rail due to the high temperature of forging makes the forging surface rough or uneven, which affects the surface quality of the heel end of the point rail. With the increasingly stringent requirements for the manufacturing process of turnouts, in order to eliminate this effect, the turnout manufacturing industry in my country reserves a machining allowance of 1~3mm when die forging AT rails, and then forges the rail heads by CNC machining centers or ordinary gantry milling machines. Milling is performed to achieve surface finish requirements. However, the ordinary gantry milling machine (the value of the machine tool is 1.2 million y...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23C3/00B23C5/12B23Q7/00
Inventor 王定安邹小魁朱磊李瑞雨史先群
Owner HUBEI WUTIESHANQIAO TRACK EQUIP CO LTD