CN104532699B - Rail milling turnning and milling grinding head lifting device and rail milling car - Google Patents
Rail milling turnning and milling grinding head lifting device and rail milling car Download PDFInfo
- Publication number
- CN104532699B CN104532699B CN201410856962.7A CN201410856962A CN104532699B CN 104532699 B CN104532699 B CN 104532699B CN 201410856962 A CN201410856962 A CN 201410856962A CN 104532699 B CN104532699 B CN 104532699B
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- Prior art keywords
- milling
- rail
- main spindle
- spindle box
- turnning
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
- E01B31/02—Working rail or other metal track components on the spot
- E01B31/12—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails
- E01B31/13—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails by milling
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
- E01B31/02—Working rail or other metal track components on the spot
- E01B31/12—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails
- E01B31/17—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails by grinding
Abstract
The present invention provides a kind of rail milling turnning and milling grinding head lifting device and rail milling car.This rail milling turnning and milling grinding head lifting device includes the bracing frame for being fixed on milling car and for installing the main spindle box of milling head, main spindle box is vertically slidably installed on bracing frame, is provided with the hydraulic cylinder for driving main spindle box vertically to lift between bracing frame and main spindle box；On main spindle box and vertically rotating and be equipped with leading screw, be arranged with screw outside leading screw, main spindle box is provided with the driving device for driving leading screw to rotate；Being connected to the detecting device for detecting the spacing with rail on screw, detecting device is connected to controller, and controller is transferred to quick condition for controlling hydraulic cylinder when detecting device detects and contacts with rail by driving condition.The present invention realizes milling head length feed by leading screw and hydraulic cylinder cooperation, milling head can be made to rise and fall with rail and follow, make the rail quality that milling goes out good, reduce the abrasion of milling head, improve service life.
Description
Technical field
The present invention relates to Machine Manufacturing Technology, particularly relate to a kind of rail milling turnning and milling grinding head lifting device and rail milling car.
Background technology
Rail milling car is that a kind of mode by moulding realizes the reparation to rail, has the advantages such as environmental friendliness, working service cost are low, circuit adaptability is good, is a kind of novel track prosthetic appliance.Milling head is the operation unit of rail milling car, the stroke moved due to milling head is bigger, and to ensure to ensure that when milling car operation milling head can carry out servo-actuated with the fluctuating of rail, accordingly, it would be desirable to milling car needs equipped with rail milling turnning and milling grinding head lifting device.
Current existing rail milling turnning and milling grinding head lifting device directly adopts the mode of leading screw to order about milling head to carry out the motion of longitudinal vertical feed, in rail dressing process, when rail ascents and descents, feed system cannot determine that milling head whether should feed or withdrawing, easily causing rail grinding irregularity, milling effect is bad.
Summary of the invention
The present invention provides a kind of rail milling turnning and milling grinding head lifting device and rail milling car, in order to solve defect of the prior art, the milling head lifting device realizing milling car according to the flat conditions of rail, can adjust the feeding of milling head automatically, it is ensured that the milling quality of rail.
A kind of rail milling turnning and milling grinding head lifting device, including for being fixed on bracing frame on milling car and for installing the main spindle box of milling head, described main spindle box is vertically slidably installed on support frame as described above, is provided with the hydraulic cylinder for driving the vertically oscilaltion of described main spindle box between support frame as described above and described main spindle box；On described main spindle box and be vertically rotatably equipped with leading screw, described leading screw outer sheath is provided with screw, and described main spindle box is fixed with the driving device for driving described leading screw to rotate；Being connected to the detecting device for detecting the spacing with rail on described screw, described detecting device is connected to controller, and described controller is converted to quick condition for controlling described hydraulic cylinder when described detecting device detects and contacts with rail by driving condition.
Further, the first chamber of described hydraulic cylinder and the second chamber are respectively connecting to a solenoid directional control valve by oil pipe, and described solenoid directional control valve is also associated with a proportional pressure-reducing valve by oil pipe, and described proportional pressure-reducing valve is connected with fuel tank by oil pipe with solenoid directional control valve.
Further, support frame as described above being vertically provided with guide rail, described main spindle box is provided with the guide groove matched with described guide rail.
Further, described main spindle box being fixedly connected with track base, described guide groove is opened on described track base.
Further, described driving device includes motor, and the output shaft of described motor is connected to one speed reducer by shaft coupling, and the output shaft of described decelerator is connected with described leading screw.
Further, described leading screw passes through bearings on described main spindle box.
Further, a fixedly sleeved nut seat outside described screw, described screw is connected with detecting device by nut seat, and described detecting device is connected with the bottom of described nut seat.
Further, described hydraulic cylinder and support frame as described above are hinged, and described main spindle box is provided with the fixing seat of piston rod, and described piston rod is hinged with the fixing seat of described piston rod.
Further, the fixing seat of described piston rod is removably mounted on described main spindle box by locking nut.
The present invention also provides for a kind of rail milling car, including car body, described car body is provided with rail milling turnning and milling grinding head lifting device described above.
Rail milling turnning and milling grinding head lifting device provided by the invention, by being vertically slidably installed on bracing frame by main spindle box, and can pass through hydraulic cylinder and drive main spindle box along bracing frame vertical direction oscilaltion；Main spindle box arranges leading screw, sheathed screw with matching outside leading screw, leading screw is connected to the driving device driving leading screw to rotate, screw is connected to the detecting device for detecting the spacing with rail, detecting device is connected to controller, at detecting device, controller is for detecting that controlling hydraulic cylinder when detecting device contacts with rail is converted to quick condition by driving condition；When detecting device touches rail time, then send a signal to controller, controller controls hydraulic cylinder and is in quick condition, and now can control driving device and drive leading screw to rotate, screw band motion detection device is made to move upward, main spindle box and milling head are moved downward, when milling head touches rail, rail is proceeded by milling by milling head, carry out in the process of milling at milling car along rail length direction, upward slope or the descending of rail can be run into, owing to hydraulic cylinder is in quick condition, can so that detecting device and can drive main spindle box to fluctuate under the impact that the gradient of rail rises and falls, and owing to milling head is arranged on main spindle box, thus drive milling head oscilaltion, namely, milling head can follow floating with the floating of main spindle box, realization reliably feeds, prevent the abrasion of milling head, improve the service life of apparatus for work.
Accompanying drawing explanation
The front view of the rail milling turnning and milling grinding head lifting device that Fig. 1 provides for the embodiment of the present invention；
The top view of the rail milling turnning and milling grinding head lifting device that Fig. 2 provides for the embodiment of the present invention；
Fig. 3 be in Fig. 2 A-A to sectional view；
Fig. 4 be in Fig. 2 B-B to sectional view；
The structural representation of the hydraulic cylinder that Fig. 5 provides for one embodiment of the invention.
Accompanying drawing labelling:
1-bracing frame；2-main spindle box；21-gripper shoe；
3-hydraulic cylinder；31-the first chamber；32-the second chamber；
4-leading screw；5-screw；6-driving device；
61-motor；62-shaft coupling；63-decelerator；
7-detecting device；8-solenoid directional control valve；9-proportional pressure-reducing valve；
10-fuel tank；11-controller；12-guide rail；
13-guide groove；14-track base；15-nut seat；
16-locking nut；17-piston rod fixes seat.
Detailed description of the invention
For the object of the invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in inventive embodiments, the technical scheme in inventive embodiments is clearly and completely described, it is clear that, described embodiment is a part of embodiment of the present invention, rather than whole embodiments.
The front view of the rail milling turnning and milling grinding head lifting device that Fig. 1 provides for the embodiment of the present invention；The top view of the rail milling turnning and milling grinding head lifting device that Fig. 2 provides for the embodiment of the present invention；Fig. 3 be in Fig. 2 A-A to sectional view；Fig. 4 be in Fig. 2 B-B to sectional view.Referring in particular to accompanying drawing 1-4, the present embodiment provides a kind of rail milling turnning and milling grinding head lifting device, including for being fixed on bracing frame 1 on milling car and for installing the main spindle box 2 of milling head (not shown), main spindle box 2 is vertically slidably installed on bracing frame 1, is provided with the hydraulic cylinder 3 for driving main spindle box 2 vertically oscilaltion between bracing frame 1 and main spindle box 2；On main spindle box 2 and be vertically rotatably equipped with leading screw 4, leading screw 4 outer sheath is provided with screw 5, and main spindle box 2 is fixed with the driving device 6 for driving leading screw 4 to rotate；Screw 5 is connected to the detecting device 7 for detecting the spacing with rail, detecting device 7 is connected to controller (not shown), at detecting device 7, controller is for detecting that controlling hydraulic cylinder 3 when detecting device contacts with rail is converted to quick condition by driving condition.
Concrete, vertical direction refers to the direction being perpendicular to horizontal plane, bracing frame 1 can be fixedly installed on milling car, the inside of main spindle box 2 can be welded with multiple gripper shoe 21 in the horizontal direction, hydraulic cylinder 3 is connected with gripper shoe 21, sheathed screw 5 outside leading screw 4, detecting device 7 may be provided at the bottom of screw 5, and it is positioned at the lower section of main spindle box 2, detecting device 7 specifically can include the positioner for being pressed on rail, and proximity switch on the positioning device is set, controller is connected with proximity switch, controller receives the signal of proximity switch input and judges, and then the switching of hydraulic cylinder 3 status is controlled according to judged result, namely quick condition is switched to by driving condition.
Wherein the quick condition of hydraulic cylinder 3 refers to, the rodless cavity of hydraulic cylinder 3 is connected by oil pipe with rod chamber, and the pressure moment of rod chamber and rodless cavity is equal；And namely driving condition refers to be not attached to lead between rodless cavity and the rod chamber of hydraulic cylinder 3, piston is promoted by the driving of hydraulic oil, such as, oily to the rodless cavity delivery hydraulic pressure of hydraulic cylinder 3 by oil pump, and under the effect of hydraulic oil, due to the pressure differential of rod chamber and rodless cavity, and drive piston to move to rod chamber, that is, piston is made to stretch out under the effect of hydraulic oil；Or, by oil pump to the rod chamber delivery hydraulic pressure oil of hydraulic cylinder 3, and under the effect of hydraulic oil, due to the pressure differential of rod chamber and rodless cavity, and drive piston to move to rodless cavity, i.e. to make piston retract under the effect of hydraulic oil.Specifically, can complete by driving condition to the switching of quick condition by controlling the magnitude of voltage different with the switching of solenoid directional control valve of hydraulic cylinder 3 connection and given proportional pressure-reducing valve, and hydraulic oil inputs from the rod chamber of hydraulic cylinder 3 or rodless cavity input, namely controls the conveying direction of fluid.
Leading screw 4 can be fixedly supported on main spindle box 2 by bearing, to ensure that leading screw 4 is beyond the linearity of vertical direction, it is also possible to realizes rotating in main spindle box, and also can reduce the frictional force between leading screw 4 and main spindle box 2 when rotating.
At the rail milling turnning and milling grinding head lifting device that the present embodiment provides, in specifically used process, first, moved to by milling car and make this device be positioned to need above the rail of milling, first give the logical oil of rod chamber of hydraulic cylinder 3, the piston rod making hydraulic cylinder 3 is retracted, thus driving main spindle box 2 to decline, owing to detecting device 7 is provided on main spindle box 2, thus band motion detection device 7 is to lower feeding, when detecting device 7 touches rail, detecting device 7 sends a signal to controller, thus controller controls to make hydraulic cylinder 3 be in quick condition, now, can control driving device 6 drives leading screw 4 to rotate forward (it is assumed here that leading screw 4 rotating forward makes screw 5 rise, reversion makes screw 5 decline), the screw 5 band motion detection device 7 that rises moves upward, main spindle box 2 and milling head decline, it should be noted that, after detecting device 7 drops to contact rail level, impact due to gravity, can there is the power of downward 1.5t always, therefore detecting device 7 contacts with rail always, without departing from rail level.Milling head may also set up corresponding detecting device, specifically for the vertical dimension between detection milling head and rail, namely the amount of feeding of milling head is detected, detecting device detects the distance between milling head and rail in real time, and controls the forward or reverse (namely controlling rising or falling of milling head) of driving device 6 in real time；Afterwards in the process of milling head milling rail, milling car travels forward along the length direction of rail, for instance, when running into rail upward slope place, rail makes detecting device 7 upwards raise, now just owing to hydraulic cylinder is already at quick condition, therefore, main spindle box 2 can be followed and upwards be elevated, thus the milling head being fixed on main spindle box 2 is also elevated so that milling amount diminishes, now, driving device 6 will drive leading screw 4 to rotate so that milling head decline feeding, the amount of feeding required during to reach milling；When running into the rail gradient and diminishing, rail makes detecting device 7 decline, now just owing to hydraulic cylinder is already at quick condition, therefore, main spindle box 2 can and then decline, thus the milling head being fixed on main spindle box 2 also follows decline, making milling quantitative change big, now, driving device 6 will drive leading screw 4 opposite direction to rotate, milling head is made to increase, the amount of feeding required during to reach milling；Detecting device 7 is connected with main spindle box 2, hydraulic cylinder 3 is connected with main spindle box 2, and hydraulic cylinder 3 is in quick condition, the piston of hydraulic cylinder 3 freely can stretch along with the change of the rail gradient, therefore, main spindle box 2 can followed by rise or fall with rail slope change, i.e. milling head can be risen and fallen with the fluctuating of rail.
From the foregoing, it will be observed that the rail milling turnning and milling grinding head lifting device that the present embodiment provides, adopt the mode coordinating feeding of leading screw and hydraulic cylinder, make the milling head can be servo-actuated up and down with the fluctuating of rail, realization reliably feeds, it is prevented that the abrasion of milling head, is further able to improve the service life of apparatus for work.
Simultaneously as adopt two grades of feedings, by the hydraulic feed of the first order, realize the length feed of big stroke, the leading screw feeding of the second level, it is achieved the little amount of feeding, high-precision feeding, overcome and prior art realizes only with leading screw roughing feed and little feeding, therefore the stroke of leading screw also be there are certain requirements, and if stroke long, namely the length of leading screw is long, also necessarily require the defect that the strength and stiffness of leading screw are significantly high, the feeding of big stroke in the confined space can be realized.
The structural representation of the hydraulic cylinder that Fig. 5 provides for one embodiment of the invention；As shown in Figure 5, first chamber 31 of hydraulic cylinder 3 and the second chamber 32 are respectively connecting to a solenoid directional control valve 8 by oil pipe, solenoid directional control valve 8 is also associated with a proportional pressure-reducing valve 9 by oil pipe, proportional pressure-reducing valve 9 and solenoid directional control valve 8 is connected with fuel tank 10 by oil pipe, controller 11 and solenoid directional control valve 8 and proportional pressure-reducing valve 9 Electricity Federation；Concrete, for instance, when needs drive milling head to rise, controlled proportional pressure-reducing valve 9 and solenoid directional control valve 8 by controller 11 so that hydraulic oil enters the second chamber 32 of hydraulic cylinder 3, and piston rod stretches out；When needs drive milling head to decline, being controlled proportional pressure-reducing valve 9 and solenoid directional control valve 8 by controller 11 so that the first chamber 31 of hydraulic cylinder 3 connects with the second chamber 32 so that hydraulic oil enters the first chamber 31 of hydraulic cylinder 3, piston rod shrinks；When needs hydraulic cylinder 3 is in quick condition, controlled proportional pressure-reducing valve 9 and solenoid directional control valve 8 by controller 11 so that the first chamber 31 (rod chamber) of hydraulic cylinder 3 connects with the second chamber 32 (rodless cavity)；When milling head is when upwards floating, hydraulic cylinder 3 piston rod moves, the hydraulic oil that first chamber 31 is discharged all flows to the second chamber 32, the hydraulic oil discharged due to the first chamber, chamber 31 can not fill up the vacancy in the second chamber 32 when piston rod rises, now 3 liang of cavity pressures of hydraulic cylinder decline, the P hydraulic fluid port of proportional pressure-reducing valve 9 is opened to the passage of A hydraulic fluid port, and hydraulic oil is from the hydraulic oil container 10 two chambeies through proportional pressure-reducing valve 9 influent cylinder pressure 3, until the oil pressure in hydraulic cylinder 3 reaches the scheduled pressure value of proportional pressure-reducing valve 9；When milling head floats downwards, the hydraulic oil part that the second chamber 32 is discharged flows to the first chamber 31, and unnecessary hydraulic oil flows back to fuel tank 10 through proportional pressure-reducing valve T mouth.
Further, for make main spindle box 2 can on bracing frame 1 vertically upper and lower linear slide, guide rail 12 vertically can be set on bracing frame 1, the quantity of guide rail 12 can be two, main spindle box 2 is provided with the guide groove 13 matched with guide rail 12, adopts the guiding form that guide rail 12 matches with guide groove 13 to realize the slide-and-guide of main spindle box 2.Or, it is also possible to it is that the form led by guide pillar realizes main spindle box 2 and the relative sliding of bracing frame 1 support, for instance, the side at bracing frame 1 arranges long guide pillar, and the side of main spindle box 2 arranges long guide pin bushing, realizes relative sliding by guide pin bushing with coordinating of guide pillar.Concrete, guide groove 13 can be along the vertically extending long recess of main spindle box 2；Can also be connect track base 14 by vertically fixing on main spindle box 2, guide groove 13 is opened on track base 14, the quantity of track base 14 can be multiple, and be uniformly distributed along the bearing of trend of guide rail 12, take multiple track base 14 to match with guide rail 12 and realize guiding, track base 14 is compared to the form directly offering long recess on main spindle box 2, and its processing is got up simpler.
The position that arranges of certain guide rail 12 and guide groove 13 can also be in turn, i.e. guide groove 13 can be arranged on bracing frame 1, and guide rail 12 is arranged on main spindle box 2.
Driving device 6 can include motor 61, and the output shaft of motor 61 can pass through shaft coupling 62 and be connected to one speed reducer 63, and the output shaft of decelerator 63 is connected with leading screw 4.By providing output speed at motor 61, adjust output speed size again through decelerator 63 so that the rotary speed of leading screw 4 controls in suitable size, further improve the safety and stability energy of device work.
In the above-described embodiments, outside screw 5 can a fixedly sleeved nut seat 15, screw 5 is connected with detecting device 7 by nut seat 15, and detecting device 7 is connected to the bottom of nut seat 15；The setting that nut seat 15 is detecting device 7 provides installing space.
Hydraulic cylinder 3 and bracing frame 1 are hinged, and main spindle box 2 is provided with the fixing seat 17 of piston rod, and piston rod is hinged with the fixing seat 17 of piston rod, and the fixing seat 17 of piston rod can pass through locking nut 16 and be removably mounted on main spindle box 2.Specifically, hydraulic cylinder 3 two ends are respectively hinged on main spindle box 2 and bracing frame 1, make hydraulic cylinder 3 and bracing frame 1 and main spindle box 2 be not that perfect rigidity is fixing to be connected, it is possible to facilitate hydraulic cylinder 3 to disassemble from bracing frame 1 and main spindle box 2, and it is more flexible that hydraulic cylinder 3 is worked together.
The present invention also provides for a kind of rail milling car, including car body, car body is provided with above-mentioned rail milling turnning and milling grinding head lifting device.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a rail milling turnning and milling grinding head lifting device, including for being fixed on bracing frame on milling car and for installing the main spindle box of milling head, it is characterized in that, described main spindle box is vertically slidably installed on support frame as described above, is provided with the hydraulic cylinder for driving the vertically oscilaltion of described main spindle box between support frame as described above and described main spindle box；On described main spindle box and be vertically rotatably equipped with leading screw, described leading screw outer sheath is provided with screw, and described main spindle box is fixed with the driving device for driving described leading screw to rotate；Described screw is connected to detecting device, described detecting device is used for the spacing detecting described detecting device with rail, described detecting device is connected to controller, at described detecting device, described controller is for detecting that described detecting device controls described hydraulic cylinder and is converted to quick condition by driving condition when contacting with rail.
2. rail milling turnning and milling grinding head lifting device according to claim 1, it is characterised in that
First chamber of described hydraulic cylinder and the second chamber are respectively connecting to a solenoid directional control valve by oil pipe, and described solenoid directional control valve is also associated with a proportional pressure-reducing valve by oil pipe, and described proportional pressure-reducing valve is connected with fuel tank by oil pipe with solenoid directional control valve.
3. rail milling turnning and milling grinding head lifting device according to claim 1, it is characterised in that being vertically provided with guide rail on support frame as described above, described main spindle box is provided with the guide groove matched with described guide rail.
4. rail milling turnning and milling grinding head lifting device according to claim 3, it is characterised in that being fixedly connected with track base on described main spindle box, described guide groove is opened on described track base.
5. rail milling turnning and milling grinding head lifting device according to claim 1, it is characterised in that described driving device includes motor, and the output shaft of described motor is connected to one speed reducer by shaft coupling, and the output shaft of described decelerator is connected with described leading screw.
6. rail milling turnning and milling grinding head lifting device according to claim 1, it is characterised in that described leading screw passes through bearings on described main spindle box.
7. rail milling turnning and milling grinding head lifting device according to claim 6, it is characterised in that a fixedly sleeved nut seat outside described screw, described screw is connected with described detecting device by nut seat, and described detecting device is connected with the bottom of described nut seat.
8. rail milling turnning and milling grinding head lifting device according to claim 1, it is characterised in that described hydraulic cylinder and support frame as described above are hinged, described main spindle box is provided with the fixing seat of piston rod, and described piston rod is hinged with the fixing seat of described piston rod.
9. rail milling turnning and milling grinding head lifting device according to claim 8, it is characterised in that the fixing seat of described piston rod is removably mounted on described main spindle box by locking nut.
10. a rail milling car, including car body, it is characterised in that install on described car body just like the rail milling turnning and milling grinding head lifting device described in any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410856962.7A CN104532699B (en) | 2014-12-31 | 2014-12-31 | Rail milling turnning and milling grinding head lifting device and rail milling car |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410856962.7A CN104532699B (en) | 2014-12-31 | 2014-12-31 | Rail milling turnning and milling grinding head lifting device and rail milling car |
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| CN104532699A CN104532699A (en) | 2015-04-22 |
| CN104532699B true CN104532699B (en) | 2016-06-29 |
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| CN201410856962.7A Active CN104532699B (en) | 2014-12-31 | 2014-12-31 | Rail milling turnning and milling grinding head lifting device and rail milling car |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911965B (en) * | 2015-05-29 | 2016-09-07 | 中国铁建高新装备股份有限公司 | A kind of mobile steel rail milling car rough mill device |
| CN110130165B (en) * | 2018-02-09 | 2024-03-15 | 中国铁建高新装备股份有限公司 | Positioning device suitable for steel rail online milling operation |
| CN109954912A (en) * | 2018-11-01 | 2019-07-02 | 湖大海捷(湖南)工程技术研究有限公司 | A kind of milling unit positioning apparatus and its milling control method |
| CN114703708B (en) * | 2022-04-19 | 2024-02-02 | 中铁第四勘察设计院集团有限公司 | Steel rail water jet polishing operation lifting system based on data processing and operation method |
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| CN204385571U (en) * | 2014-12-31 | 2015-06-10 | 北京二七轨道交通装备有限责任公司 | Rail milling turnning and milling grinding head lifting device and rail milling car |
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| JP2001047353A (en) * | 1999-08-05 | 2001-02-20 | Noritake Co Ltd | Grinding method and device for slab, and fms equipped with the grinding device |
| CN2659938Y (en) * | 2003-12-11 | 2004-12-01 | 彭连弟 | Switch dresser |
| CN201362813Y (en) * | 2008-12-29 | 2009-12-16 | 大连陆通机械设备有限公司 | Hydraulic rail milling machine |
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