CN107584256A - A kind of rail milling process - Google Patents
A kind of rail milling process Download PDFInfo
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- CN107584256A CN107584256A CN201710998125.1A CN201710998125A CN107584256A CN 107584256 A CN107584256 A CN 107584256A CN 201710998125 A CN201710998125 A CN 201710998125A CN 107584256 A CN107584256 A CN 107584256A
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- rail
- milling
- heel end
- die forging
- rail head
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Abstract
The invention discloses a kind of rail milling process, belong to railway technology field, mainly comprise the steps of：（1）Heat treatment；（2）Heel end once pushes up tune；（3）Blanking；（4）Adjust on the secondary top of heel end；（5）Flange of rail slabbing；（6）Rail head surplus milling.The rail milling process of the present invention only needs 1 production staffing, has not only saved labour, and unit value utilization rate of equipment and installations is high, and split run yield is high, significantly reduces unit product equipment investment, improves production efficiency.
Description
Technical field
The present invention relates to railway technology field, and in particular to a kind of rail milling process.
Background technology
At present, railway switch is processed into standard gauge with AT rail heel ends is process by the technique such as forging and pressing, quenching.
In the prior art, the surface scale that tongue generates because forging and pressing high temperature causes die forging rough surface or occurred uneven existing
As influenceing heel of switch rail surface quality.As switch manufacture technological requirement is increasingly strict, to eliminate this influence, China's track switch
Manufacturing reserves 1 ~ 3mm allowance in AT rail die forgings, then by with numerical control machining center or ordinary gantry milling machine
Milling is carried out to die forging rail head to reach surface smoothness requirements.However, ordinary gantry milling machine（Lathe is worth 1,200,000 yuan）,
When carrying out milling, the people of staffing 2 is produced, because hot change type influences a milling thickness, admittedly need left and right two sides to distinguish 3 ~ 4 millings, it is single
Class's output 6 ~ 7, production efficiency is low；CNC milling machine（Lathe is worth 10,000,000 yuan）, when carrying out milling, produce staffing 2
People, pendulous frequency is more, and split run yield about 10, lathe unit value utilization rate is low.
The content of the invention
For shortcoming present in above-mentioned prior art, a kind of rail milling process of the invention only needs 1 production fixed
Member, has not only saved labour, and split run yield can reach 14, drastically increase production efficiency.
In order to realize above-mentioned technical purpose, a kind of rail milling process of the invention, it is characterised in that include following step
Suddenly：
（1）Heat treatment：AT rail die forgings heel end is sent into stove and heated, 970 DEG C is heated to, comes out of the stove and quenching, blast is blowed
More than 0.4MPa, time 180S, then air cooling processing is carried out, obtain off-gauge die forging heel end；
（2）Heel end once pushes up tune：Ensure rail mother metal and die forging heel end linearity；
（3）Blanking：Cut away the predetermined heel end termination of non-standard die forging heel end；
（4）Adjust on the secondary top of heel end：Milling part is treated using the non-standard die forging heel end rail head of measuring scale accurate measuring, and ensures rail
The discrepancy in elevation between linearity, and mother metal and die forging heel end；
（5）Flange of rail slabbing：With standard gauge rail end " end face " for model, non-standard die forging heel end is placed in milling machine table
On, mother metal is positioned on adjustable bracket, maintains the flange of rail upward, carries out milling by flange of rail plain milling cutter, then use high level of accuracy
Instrument is detected, i.e.,：High-accuracy water level is placed in model and above rail, regulation rail angle makes high-accuracy water level bubble
Between two parties, standard gauge bottom is obtained；
（6）Rail head surplus milling：Non-standard die forging heel end termination is directed at " end face " model termination, setting-out determines to treat the non-of milling
Standard die forging heel end rail head balance, utilize " rail contraposition model " be close to respectively on the outside of die forging changeover portion mother metal and die forging with
Termination line position rail head is held, digital display rule is reused and measures its distance with milling machine table edge, then may be used when reading is consistent
Ensure that mother metal keeps same straight line with line position, then carry out milling using rail head surplus milling cutter, obtain standard rail head.
Preferably, the measuring scale is hollow out measuring scale, and the hollow out measuring scale is divided into milling measurement part and surveyed with mother metal
Part is measured, the high mother metal measurement part chi that is less than of the milling measurement part chi is high, is also set up on the top of milling measurement part
There is the measurement end for fixing non-standard die forging heel end termination.
Preferably, the flange of rail plain milling cutter includes the first handle of a knife and the first blade, and first handle of a knife is tied for cylinder
Structure, first blade are several, are equidistantly evenly distributed on the outside of the first handle of a knife.
Preferably, the rail head surplus milling cutter includes the second handle of a knife and the second blade, and second blade is inward at both ends
The cylinder of depression, the angle that is recessed and standard gauge rail head are in the same size, and second handle of a knife passes through the both sides of the second blade, described
" rail contraposition model " is structure of right angle tyoe, and it is the structure to cave inward that " rail contraposition model ", which is close to die forging heel end termination, recessed
Fall into angle and standard gauge rail head is in the same size.
Preferably, the flange of rail plain milling cutter is arranged on institute by the first handle of a knife, rail head surplus milling cutter by the second handle of a knife
State the top of milling machine table.
Preferably, flange of rail plain milling cutter and rail head the surplus milling cutter corresponds to rail head of rail, web of the rail two sides are respectively at least set
It is equipped with a spray wind tuyere.
Preferably, the adjustable bracket includes bottom plate, the support body being arranged above bottom plate, the slide unit on support body, institute
State slide unit and motor is connected with by screw mandrel, the slide unit both sides are symmetrically fixedly installed funnelform baffle plate, are provided with slide unit
Shelf.
Further, the bottom plate both ends are vertically installed with screw rod, and the screw rod can move upper and lower, left and right on bottom plate
It is dynamic, with the position of regulating base board.
Further, worm gear drive mechanism is additionally provided between the screw mandrel and motor, screw mandrel is driven by worm gear drive
Motion, and then drive slide unit motion.
Compared with prior art, a kind of rail milling process of the invention, has advantages below：（1）Pass through flange of rail plane
Milling cutter and rail head surplus milling cutter capable of being disposably complete the milling process of rail, without multiple milling, have saved manpower, have improved life
Produce efficiency；（2）Flange of rail plain milling cutter and rail head surplus milling cutter correspond to rail head of rail, web of the rail two sides respectively at least provided with a spray
Wind tuyere, the termination thermal deformation of rail heel end can be reduced, to control quality；Service life can be improved by carrying out cooling to blade simultaneously.
Brief description of the drawings
Fig. 1：The workflow diagram of the present invention；
Fig. 2：The structural representation of hollow out measuring scale in the present invention；
Fig. 3：The use state figure of hollow out measuring scale in the present invention；
Fig. 4：The structural representation of rail-end model in the present invention；
Fig. 5：The sectional view of flange of rail plain milling cutter in the present invention；
Fig. 6：High-accuracy water level use state figure in the present invention；
Fig. 7：Rail head surplus milling cutter sectional view in the present invention；
Fig. 8：Fig. 7 side view；
Fig. 9：Rail aligns model use state figure in the present invention；
Figure 10：The structural representation of milling machine in the present invention；
Figure 11：Adjustable bracket structural representation in the present invention.
In figure：1st, measuring scale 11, milling measurement part 12, canonical measure part 13, measurement end 14, the portion for treating milling
Divide 2, rail-end model 21, rail head 22, the web of the rail 23, the flange of rail 3, flange of rail plain milling cutter 31, the first handle of a knife 32, first
Blade 4, rail head surplus milling cutter 41, the second handle of a knife 42, the second blade 5, rail contraposition model 6, milling machine 7, rail 8, can
Adjust bracket 81, bottom plate 82, support body 83, slide unit 84, screw mandrel 85, motor 86, shelf 87, baffle plate 88, worm gear drive machine
Structure 9, high-accuracy water level.
Embodiment
Become apparent from understanding in order that the objects, technical solutions and advantages of the present invention seem, now pass through specific embodiment pair
The present invention is further explained explanation, it will be appreciated that embodiment described herein is only explanation of the present invention, not
For limiting the scope of the invention.
As shown in figure 1, a kind of rail milling process of the present invention, is comprised the steps of：
（1）Heat treatment：AT rail die forgings heel end is sent into stove and heated, 970 DEG C is heated to, comes out of the stove and quenching, blast is blowed
More than 0.4MPa, time 180S, then air cooling processing is carried out, obtain off-gauge die forging heel end；
（2）Heel end once pushes up tune：Ensure rail mother metal and die forging heel end linearity；
（3）Blanking：Cut away the predetermined heel end termination of non-standard die forging heel end；
（4）Adjust on the secondary top of heel end：Milling part is treated using the non-standard die forging heel end rail head of the accurate measuring of hollow out measuring scale 1, is such as schemed
2nd, shown in Fig. 3, because hollow out measuring scale is divided into milling measurement part 11 and mother metal measurement part 12, and the milling measurement chi of part 11
Height is less than the mother metal measurement chi of part 12 height, is provided with the top of milling measurement part 11 for fixing non-standard die forging heel end
The measurement end 13 of termination, the one end of measurement end 13 is fixed on the termination of non-standard die forging heel end, the other end of hollow out measuring scale 1
It is positioned on mother metal, the flange of rail thickness remained between such milling measurement part 11 and the flange of rail between gap is the portion for treating milling
Points 14, flange of rail glacing flatness is ensured with this；
（5）Flange of rail slabbing：, will be above-mentioned using standard gauge rail end end face as model 2 referring to Fig. 4, Fig. 5, Fig. 6, Figure 10, Figure 11
Determine the non-standard die forging heel end with milling to be placed on the workbench of milling machine 6, mother metal is positioned on adjustable bracket 8, support that this is adjustable
Frame 8 includes bottom plate 81, the support body 82 for being arranged at the top of bottom plate 81, the slide unit 83 on support body 82, and slide unit 83 passes through screw mandrel 84
Motor 85 is connected with worm gear drive mechanism 88, drives screw mandrel 84 to move by worm gear drive mechanism 88, and then drive slide unit 83
Motion, the both sides of slide unit 83 are symmetrically fixedly installed funnelform baffle plate 87, shelf 86 are provided with slide unit 83, and the both ends of bottom plate 81 are hung down
Straight to be provided with screw rod 89, screw rod 89 can move upper and lower, left and right on bottom plate, with the position of regulating base board 81；Maintain the flange of rail
Upward, milling is carried out by flange of rail plain milling cutter 3, then detected with high-accuracy water level 9, i.e.,：High-accuracy water level 9 is put
Above model 2 and rail, by the position of the regulation adjustable bracket 8 of screw rod 89, the rail that is placed on shelf 86 is adjusted indirectly
Angle, make the bubble of high-accuracy water level 9 placed in the middle, milling is carried out by flange of rail plain milling cutter 3, obtains standard gauge bottom 23, wherein rail
Baseplane milling cutter 3 includes the first handle of a knife 31 and the first blade 32, and the first handle of a knife 31 is cylindrical structural, and the first blade 32 is some
It is individual, equidistantly it is evenly distributed on the outside of the first handle of a knife 32.
（6）Rail head surplus milling：With continued reference to Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, standard gauge bottom has been obtained by above-mentioned
Non-standard die forging heel end rail head alignment the rail head of model 2, setting-out determine treat the non-standard with end module rail head surplus portion of milling
Point, utilize " rail contraposition model 5 " is close to mother metal and die forging heel end termination line position rail head on the outside of die forging changeover portion respectively, then
Its distance with milling machine table edge is measured using digital display rule, then can ensure that mother metal is kept with line position when reading is consistent
Same straight line, milling then is carried out using rail head surplus milling cutter 4, obtains standard rail head.Wherein rail head surplus milling cutter 4 includes second
The blade 42 of handle of a knife 41 and second, the second blade 42 are the cylinder of inward at both ends depression, depression angle and the size of model rail head 21
Unanimously, the second handle of a knife 41 passes through the both sides of the second blade 42, and " rail contraposition model 5 " is structure of right angle tyoe, and " rail aligns sample
It is the structure to cave inward that plate " 5, which is close to die forging heel end termination, and depression angle is also in the same size with standard gauge rail head.So work as rail
When head surplus milling cutter 4 just carries out milling to non-standard die forging heel end rail head on the table, due to the limitation for the angle that is recessed so that
Non-standard die forging heel end rail head can only carry out milling towards the shape size of model rail head 21, and a milling can achieve the goal,
Without multiple milling, operating efficiency is improved.
In addition, in above flange of rail plain milling cutter 3 and rail head surplus milling cutter 4, correspondingly rail head of rail 21, the two sides of the web of the rail 22 are each
At least provided with a spray wind tuyere, in the present embodiment, be chosen at each face and one spray wind tuyere be respectively set, in milling process with
0.3 ~ 0.6mpa air quantity is synchronous to milling position compressed air cooling, can reduce steel rail endses thermal deformation to control quality；Simultaneously to knife
Piece is cooled down to improve service life.
By above milling process, 1 production staffing is only needed, has not only saved labour, and split run yield can reach
14, drastically increase production efficiency.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, without departing from the inventive concept of the premise, can also make some improvements and modifications, these improvements and modifications also should be regarded as
In protection scope of the present invention.
Claims (9)
1. a kind of rail milling process, it is characterised in that comprise the steps of：
Heat treatment：AT rail die forgings heel end is sent into stove and heated, 970 DEG C is heated to, comes out of the stove and quenching, blast is blowed
More than 0.4MPa, time 180S, then air cooling processing is carried out, obtain off-gauge die forging heel end；
Heel end once pushes up tune：Ensure rail mother metal and die forging heel end linearity；
Blanking：Cut away the predetermined heel end termination of non-standard die forging heel end；
Adjust on the secondary top of heel end：Milling part is treated using the non-standard die forging heel end rail head of measuring scale accurate measuring, and ensures that rail is straight
The discrepancy in elevation between dimension, and mother metal and die forging heel end；
Flange of rail slabbing：With standard gauge rail end " end face " for model, non-standard die forging heel end is placed on milling machine table, it is female
Material is positioned on adjustable bracket, maintains the flange of rail upward, carries out milling by flange of rail plain milling cutter, then carried out with high-accuracy water level
Detection, i.e.,：High-accuracy water level is placed in model and above rail, regulation rail angle makes high-accuracy water level bubble placed in the middle,
Obtain standard gauge bottom；
Rail head surplus milling：Non-standard die forging heel end termination is directed at " end face " model, setting-out determines to treat the nonstandard quasi-mode of milling
Heel end rail head balance is forged, utilizes " rail contraposition model " to be close to mother metal and die forging heel end termination on the outside of die forging changeover portion respectively
Line position rail head, reuses digital display rule and measures its distance with milling machine table edge, mother is then can ensure that when reading is consistent
Material keeps same straight line with line position, then carries out milling using rail head surplus milling cutter, obtains standard rail head.
2. rail milling process according to claim 1, it is characterised in that：The measuring scale is hollow out measuring scale, described
Hollow out measuring scale is divided into milling measurement part and measures part with mother metal, and the milling measurement part chi is high to be less than mother metal measurement part
Chi is high, and the measurement end for fixing non-standard die forging heel end termination is additionally provided with the top of milling measurement part.
3. rail milling process according to claim 1, it is characterised in that：The flange of rail plain milling cutter includes the first handle of a knife
With the first blade, first handle of a knife is cylindrical structural, and first blade is several, is equidistantly evenly distributed on first
On the outside of handle of a knife.
4. rail milling process according to claim 1, it is characterised in that：The rail head surplus milling cutter includes the second handle of a knife
With the second blade, second blade is the cylinder of inward at both ends depression, and the angle that is recessed and standard gauge rail head are in the same size, institute
The both sides that the second handle of a knife passes through the second blade are stated, " the rail contraposition model " is structure of right angle tyoe, and " rail contraposition model " is tight
It is the structure to cave inward to paste die forging heel end termination, and the angle that is recessed and standard gauge rail head are in the same size.
5. according to the rail milling process described in claim any one of 1-4, it is characterised in that：The flange of rail plain milling cutter passes through
First handle of a knife, rail head surplus milling cutter are arranged on the top of the milling machine table by the second handle of a knife.
6. according to the rail milling process described in claim any one of 1-4, it is characterised in that：The flange of rail plain milling cutter and rail
Head surplus milling cutter corresponds to rail head of rail, web of the rail two sides respectively at least provided with a spray wind tuyere.
7. rail milling process according to claim 1, it is characterised in that：The adjustable bracket includes bottom plate, is arranged at
Support body above bottom plate, the slide unit on support body, the slide unit are connected with motor by screw mandrel, and the slide unit both sides are symmetrically solid
Surely funnelform baffle plate is provided with, shelf is provided with slide unit.
8. rail milling process according to claim 7, it is characterised in that：The bottom plate both ends are vertically installed with screw rod,
The screw rod can move upper and lower, left and right on bottom plate, with the position of regulating base board.
9. rail milling process according to claim 7, it is characterised in that：Whirlpool is additionally provided between the screw mandrel and motor
Wheel drive mechanism, drive screw mandrel to move by worm gear drive, and then drive slide unit motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710998125.1A CN107584256A (en) | 2017-10-24 | 2017-10-24 | A kind of rail milling process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710998125.1A CN107584256A (en) | 2017-10-24 | 2017-10-24 | A kind of rail milling process |
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| Publication Number | Publication Date |
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| CN107584256A true CN107584256A (en) | 2018-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710998125.1A Pending CN107584256A (en) | 2017-10-24 | 2017-10-24 | A kind of rail milling process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162154A (en) * | 2018-10-19 | 2019-01-08 | 安徽中志轨道交通装备制造有限公司 | A kind of steel alloy obtuse angle assembled frog |
| CN110202194A (en) * | 2019-06-13 | 2019-09-06 | 中铁山桥集团有限公司 | A kind of steel rail web mark minimizing technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162154A (en) * | 2018-10-19 | 2019-01-08 | 安徽中志轨道交通装备制造有限公司 | A kind of steel alloy obtuse angle assembled frog |
| CN110202194A (en) * | 2019-06-13 | 2019-09-06 | 中铁山桥集团有限公司 | A kind of steel rail web mark minimizing technology |
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Application publication date: 20180116 |