CN-121992693-A - Peripheral end compound polishing method

CN121992693ACN 121992693 ACN121992693 ACN 121992693ACN-121992693-A

Abstract

The invention discloses a peripheral end compound polishing method, belongs to the technical field of steel rail repairing treatment, and is used for solving at least one of the problems of low turnout polishing efficiency, limited polishing of a point rail and a switch rail, collision of a grinding wheel with the point rail and a guard rail in the polishing process and unstable polishing quality in the prior art. The method comprises the steps of polishing a steel rail main body and a turnout part by adopting a peripheral polishing device with a peripheral polishing wheel, detecting the basic profile of the steel rail by adopting a steel rail profile meter, judging whether the angle of the steel rail with the basic profile not reaching a target profile is smaller than the angle coverage range of the peripheral polishing wheel, if so, performing supplementary repair on the profile of the steel rail by adopting an end surface polishing device with an end surface polishing wheel, if not, performing peripheral polishing on the steel rail again by adopting the peripheral polishing device with the peripheral polishing wheel, and performing polishing and polishing on the turnout part with the peripheral polishing wheel which cannot cover the polishing by adopting the peripheral polishing device with a paper polishing wheel. The invention can be used for polishing the steel rail.

Inventors

YU ZHE
LI ZHENG
ZHAI MING
REN JINLEI
SHI MENGLEI
SONG HONGTU
YANG GUANG
Du Hanqiu
ZHANG QIAN

Assignees

铁科金化检测中心有限公司
北京中铁科新材料技术有限公司
中国铁道科学研究院集团有限公司金属及化学研究所
铁科金化科技有限公司
中国铁道科学研究院集团有限公司

Dates

Publication Date: 20260508
Application Date: 20260330

Claims (10)

1. The peripheral end compound polishing method is characterized by comprising the following steps of: Step 1, polishing a steel rail main body and a turnout part by adopting a peripheral polishing device provided with a peripheral grinding wheel to form basic profiles of the steel rail main body and the turnout part; Step 2, detecting the basic profile of the steel rail by adopting a steel rail profile meter, and judging whether the angle of the steel rail with the basic profile not reaching the target profile is smaller than the angle coverage range of the peripheral grinding wheel; if yes, adopting an end face grinding device with an end face grinding wheel to supplement and repair the steel rail profile to form a steel rail target profile; if not, adopting a peripheral grinding device provided with a peripheral grinding wheel to grind the peripheral surface of the steel rail again; and 3, polishing and grinding the turnout part which is not covered and ground by the peripheral grinding wheel by adopting a peripheral grinding device provided with a paper grinding wheel.
2. The method according to claim 1, wherein in the step 2, the end face grinding range does not include switch portions having widths of 20mm or less for the point rail, the long point rail, and the short point rail.
3. The method of end-of-circumference compound grinding according to claim 1, wherein in step 1, the switch portion includes a long rail-short rail connecting portion and a stock rail-point rail connecting portion arranged in this order; The direction from the long rail-short rail connecting portion to the stock rail-point rail connecting portion is forward, and the direction from the stock rail-point rail connecting portion to the long rail-short rail connecting portion is reverse.
4. A method of end-of-circumference compound grinding according to claim 3, wherein in step 1, the method of grinding the switch includes forward grinding and reverse grinding.
5. The peripheral end compound sanding method as defined in claim 4 wherein the forward sanding and reverse sanding are alternately performed.
6. The peripheral end compound grinding method as recited in claim 1, wherein in the step3, the peripheral grinding wheel does not cover the ground turnout portion including a portion between 100 mm-110 mm before the tip of the point and 20mm between the point and the stock rail and a portion between 100 mm-110 mm before the tip of the long point and the short point and between the long point and 20mm between the short point.
7. The peripheral end compound grinding method as recited in claim 1, wherein the peripheral surface grinding wheel is a grindstone grinding wheel and the end surface grinding wheel is a grindstone grinding wheel.
8. The method for compound polishing of the peripheral end according to claim 1, wherein in the step 3, the number of polishing passes is 4 or more.
9. The peripheral end compound polishing method according to claim 1, wherein the polishing amount is 0.08 mm-0.12 mm.
10. The peripheral end composite grinding method according to claim 1, wherein the running speeds of the peripheral surface grinding wheel, the end surface grinding wheel and the paper grinding wheel are all 1km/h to 30km/h.

Description

Peripheral end compound polishing method Technical Field The invention belongs to the technical field of steel rail repair treatment, and particularly relates to a peripheral end compound polishing method. Background With the increase of the service time of the line, the damage condition of the steel rail is increasingly prominent. Because of the structural complexity, the straight and side injuries (such as side grinding, scale marks, stripping blocks and the like) of the turnout as a weak link of the line are more serious. The rail grinding is an important means for treating damage, restoring the profile of the rail and improving the relationship of the wheel and the rail, and has irreplaceable functions in the process of grinding lines and turnouts. The switch is polished to the mode that adopts the switch to polish the car as the owner, artifical dolly as the assistance at present, this is because the switch is polished the car and is polished for single terminal surface (i.e. emery wheel side surface), emery wheel and rail grinding face are less, there is the inefficiency of polishing, there is the facet that polishes, switch and temperature regulator limited zone big (there is great limited zone of polishing in switch rail and switch rail region), traditional switch is polished the car and can only polish with the manual dolly polishing, handle rail ripples and grind effect limited etc. not enough, simultaneously, present domestic switch grinds the car in order to avoid the emery wheel to bump fork and guardrail in the work progress, generally all do not polish the curved strand of switch, carry out subsequent preventative and repairability by the manual dolly to the curved strand of switch and polish, the manual dolly has the unstable problem of polishing quality again. Disclosure of Invention In view of the above analysis, the embodiment of the invention aims to provide a peripheral end compound polishing method which is used for solving at least one problem of low turnout polishing efficiency, limited polishing of a point rail and a point rail, collision of a grinding wheel with the point rail and a guard rail in the polishing process and unstable polishing quality in the prior art. The aim of the invention is mainly achieved by the following technical scheme. The invention provides a peripheral end compound polishing method, which comprises the following steps: Step 1, polishing a steel rail main body and a turnout part by adopting a peripheral polishing device provided with a peripheral grinding wheel to form basic profiles of the steel rail main body and the turnout part; Step 2, detecting the basic profile of the steel rail by adopting a steel rail profile meter, and judging whether the angle of the steel rail with the basic profile not reaching the target profile is smaller than the angle coverage range of the peripheral grinding wheel; if yes, adopting an end face grinding device with an end face grinding wheel to supplement and repair the steel rail profile to form a steel rail target profile; if not, adopting a peripheral grinding device provided with a peripheral grinding wheel to grind the peripheral surface of the steel rail again; and 3, polishing and grinding the turnout part which is not covered and ground by the peripheral grinding wheel by adopting a peripheral grinding device provided with a paper grinding wheel. Further, the peripheral surface grinding wheel is a grinding stone grinding wheel, and the end surface grinding wheel is a grinding stone grinding wheel. Further, in step 2, the end face grinding range does not include switch portions having widths of 20mm or less for the point rail, the long point rail, and the short point rail. Further, in step 1, the switch portion includes a long-point rail-short-point rail connecting portion and a stock rail-point rail connecting portion which are disposed in this order; The direction from the long rail-short rail connecting portion to the stock rail-point rail connecting portion is forward, and the direction from the stock rail-point rail connecting portion to the long rail-short rail connecting portion is reverse. Further, in step 1, the polishing method of the switch includes forward polishing and reverse polishing. Further, forward polishing and reverse polishing are alternately performed. Further, in step 3, the portion of the turnout where the peripheral grinding wheel fails to cover the grinding includes a portion between 100 mm-110 mm before the tip and 20mm between the point and the stock rail and a portion between 100 mm-110 mm before the long point and the short point and 20mm between the long point and the short point. Further, in step 3, the number of grinding passes is 4 or more. Further, the polishing amount is 0.08-0.12 mm. Further, the running speeds of the peripheral surface grinding wheel, the end surface grinding wheel and the paper grinding wheel are all 1 km/h-30 km/h. Compared with the prior art, the invention h