CN102773614A - Medium frequency induction welding method of rail - Google Patents
Medium frequency induction welding method of rail Download PDFInfo
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- CN102773614A CN102773614A CN2012102758626A CN201210275862A CN102773614A CN 102773614 A CN102773614 A CN 102773614A CN 2012102758626 A CN2012102758626 A CN 2012102758626A CN 201210275862 A CN201210275862 A CN 201210275862A CN 102773614 A CN102773614 A CN 102773614A
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Abstract
The invention discloses a medium frequency induction welding method of a rail. The medium frequency induction welding method is characterized by comprising the following steps: 1. a rail to be welded is clamped by utilizing a gas pressure welding clamping machine; the end surface area to be welded of the rail to be welded is heated by a medium frequency inductor; in the heating process, an infrared thermometer is used for detecting whether the heating temperature of the end surface area to be welded reaches a welding upsetting initial temperature or not; and the medium frequency inductor is connected with a medium frequency power source and a water cooling system; and 2. the welding upsetting of the rail to be welded is realized. Through the medium frequency induction welding method disclosed by the invention, in a welding process, the welding upsetting temperature is accurately controlled; the interference of anthropic factors on the welding quality is eliminated to a maximum extent; the stability is high; foundry defects and flash welding ash spots are not generated; and when the welding quality is guaranteed, the automatic flow line production is conveniently realized and the welding production efficiency is favorably improved.
Description
Technical field
The present invention relates to the Medium frequency induction welding method of the solder technology of rail, particularly a kind of rail.
Background technology
In the rail welding technique, the requirement of the mechanical performance of butt welded seam, geometric accuracy and quality stability is very high, and the quality of welding quality has a strong impact on the service life of rail.At present, the welding method of rail mainly contains several following four kinds:
1, exothermic welding: utilize the thermit reaction hotwork to be thermal source, make aluminum heat flux become liquid metal, inject sand mold and form weld metal.Because weld seam is the casting weld structure, then there is pore inevitably, is mingled with, casting flaws such as slag inclusion, shrinkage porosite, its mechanical performance is significantly less than the rail mother metal, and commissure plasticity and toughness are all lower.
2, flash welding: when electric current passes through the contact surface of two butt joint rail; The resistance of the contact point that it is tiny and the electric arc of contact surface thereof produce heat; Butting surface is heated; After in due course, butt joint is exerted pressure, and the whole zone that makes two butting surfaces is the electric resistance welding method that gets up of strong bonded simultaneously.Yet there is the seam organization greyness in flash welding, can't avoid, and when the greyness area surpasses to a certain degree, soldering tip is scrapped, and seriously reduces the mechanical performance of weld seam; In addition, the required bonding power of flash welding is high, very high (with the GAAS80 stationary welding machine is example to the welding machine cost, its cost about 1,200 ten thousand; Add that the accessory total price is up to 1,700 ten thousand); Maybe need change accessory in case welding machine breaks down, will cause greater loss, have a strong impact on production efficiency simultaneously.
3, arc welding: utilize the fusion welding method of electric arc as thermal source, fusing back, welding base metal is filled form weld seam, its manual degree is high, and production efficiency is low, and quality is wayward, poor stability.
4, gas pressure welding: adopt oxygen, acetylene torch that rail is heated to mecystasis; Utilize pressure welding machine clamping rail to be welded and impose upsetting force and accomplish welding, though the commissure do not have casting flaw, do not produce the flash welding greyness because the interference of flame; Be difficult to realize accurate measurement and control to rail temperature; So can not confirm best upset opportunity through the temperature of accurate measurement weld seam, to guarantee the quality and the stability thereof of weld seam, welding quality relies on operator's experience largely; The human factor influence is bigger, and welding efficiency is low.
Summary of the invention
Technical problem to be solved by this invention provides a kind ofly can accurately control the upset temperature in welding process, eliminate the Medium frequency induction welding method of human factor to welding Mass Interference, the high rail of stability to greatest extent; Casting flaw can not occur, not produce the flash welding greyness; When guaranteeing welding quality, be convenient to realize automatic assembly line production, help to improve welding production efficiency.
Technical scheme of the present invention is:
The Medium frequency induction welding method of this rail, its special character is to comprise the steps:
1, utilizes pressure welding machine clamping rail to be welded; The end region to be welded that adopts intermediate frequency inductor to treat the welding steel rail heats; Whether the heating-up temperature of utilizing infrared radiation thermometer to detect end region to be welded in the heating process reaches welding upset initial temperature, and said intermediate frequency inductor is connected with intermediate frequency power supply and water-cooling system;
2, treat the welding steel rail and realize the welding upset.
Before the heating, said intermediate frequency inductor is supported on the guide pillar of pressure welding machine and surrounds the end face to be welded of two rail to be welded, and the gap of regulating intermediate frequency inductor and rail to be welded is to 29-31mm.
Said welding upset initial temperature is 1220 ℃-1280 ℃.
Be 40～50s the heat time heating time of said intermediate frequency inductor.
The upset amount is controlled at 27 mm～35mm.
The 10-15 of welding upset after heating stops to accomplish in second.
Said intermediate frequency inductor is made up of left and right hollow copper body; Said left and right hollow copper body utilizes connector to be connected to form the closed hoop of corresponding rail to be welded, and the surface configuration and the rail outer contour shape to be welded of the corresponding rail to be welded of said left and right hollow copper body adapt.
Said water-cooling system is made up of cooling water pump, the water tank and the cooling water pipeline that communicate with the water inlet of cooling water pump; The lower surface of said left and right hollow copper body is respectively equipped with into, and water tubing string, upper surface are respectively equipped with the water outlet tubing string; Said water inlet tubing string utilizes cooling water pipeline to link to each other with the delivery port of cooling water pump; Said water outlet tubing string utilizes cooling water pipeline to link to each other with the water inlet of water tank; Make cooling water get into left and right hollow copper body, flow out left and right hollow copper body and return water tank by the water outlet tubing string through the water inlet tubing string; Transfer via cooling water pump and to get into left and right hollow copper body once more, realize cooling water from bottom to top circulation in left and right hollow copper body, and then reach the purpose of cooling intermediate frequency inductor.
Corresponding left and right hollow copper body position is respectively equipped with supporting carriage on the guide pillar of said pressure welding machine; Said supporting carriage by vehicle wheel frame, be installed in that vehicle wheel frame below matches with the periphery of guide pillar wheel, stand on double-screw bolt above the vehicle wheel frame, be located at the adjusting nut on the double-screw bolt, the vehicle frame that is connected on the adjusting nut is formed; Said vehicle frame is provided with the strip hole of the clamping position of end portion, supports body and corresponding adjusting nut; Said left and right hollow copper body is respectively equipped with the supporting base of the end portion, supports body of corresponding vehicle frame, and said supporting base is provided with trip bolt and utilizes trip bolt to be connected with the end portion, supports body that inserts its inner vehicle frame.
After the welding upset is accomplished, utilize the pushing convex knife pad that pushing convex knife is installed on the big support of pressure welding machine, pressure welding machine drives said pushing convex knife the overlap at steel rail welding line place is turned down, and said pushing convex knife is by being made up of a cutter, broadsword, flange of rail cutter.
The invention has the beneficial effects as follows:
1, on the Fundamentals of Welding basis of gas pressure welding; Adopt the Frequency Induction Heating mode; Promptly using intermediate frequency power supply is the intermediate frequency inductor power supply, makes the inner alternating flux that produces of rail to be welded through alternating current, and comprehensive utilization kelvin effect, neighbour's effect and ring-around are treated the welding steel rail and realized heating; Weld metal is the forging tissue of rail base metals; Weld seam mechanical performance and rail mother metal are basic identical, can not occur casting flaw in the welding process, can not produce the flash welding greyness, and the efficiency of heating surface is high simultaneously.
2, the Frequency Induction Heating mode is no flame heat; Utilize the heating-up temperature before the accurate observing and controlling of the infrared radiation thermometer welding upset, confirming best upset opportunity according to detected temperatures, when the end region temperature to be welded of measuring rail to be welded when infrared temperature measurer reaches welding upset initial temperature; Accomplish the welding upset through driving pressure welding machine; Two rail welding to be welded are become one, to reach the purpose of accurate control upset temperature, owing to do not rely on operator's experience; Eliminated the interference of human factor to greatest extent, guaranteed weldquality and stability thereof welding quality.
3, heating, thermometric, upset welding process have reduced artificial participation to greatest extent, are convenient to realize automatic assembly line production, help to improve welding production efficiency.
4, use this welding method institute welding piece to satisfy the requirement of concerned countries standard and iron mark standard, i.e. the requirement of TB/T1632-2005 " rail welding " is satisfied in drop weight test, quiet curved test, tension test, impact test and metallographic structure; The requirement of GB/T 2585-2007 " railway is used hot rolled rail " is satisfied in fatigue test.
Description of drawings
Fig. 1 is that welding equipment of the present invention is formed sketch map;
Fig. 2 is the heating schematic diagram of intermediate frequency inductor of the present invention;
Fig. 3 is a rail welding upset sketch map of the present invention;
Fig. 4 is the structural representation of the supporting carriage that adopts of the present invention;
Fig. 5 is the vertical view of Fig. 4;
Fig. 6 is the structural representation of the pushing convex knife that adopts of the present invention;
Fig. 7 is the left view of Fig. 6.
Among the figure: high-voltage electric oil pump 1; Pressure welding machine 2; Guide pillar 201; Big support 202; Intermediate frequency inductor 3; The hollow copper body 301 in a left side; Water outlet tubing string 301a; Supporting base 301b; Water inlet tubing string 301c; Right hollow copper body 302; Water outlet tubing string 302a; Supporting base 302b; Water inlet tubing string 302c; Infrared radiation thermometer 4; Cooling water pump 5; Delivery port 501; Rail 6 to be welded; Electrical power control cabinet 7; Connector 8; Supporting carriage 9; Adjusting nut 901; Double-screw bolt 902; Vehicle frame 903; End portion, supports body 903a; Strip hole 903b; Vehicle wheel frame 904; Wheel 905; Intermediate frequency power supply 10; Power line (transmission alternating current) 11; Cooling water pipeline 12; Alternating flux 13; Overlap 14; Trip bolt 15; Cutter 16; Broadsword 17; Flange of rail cutter 18; Pushing convex knife pad 19; Water tank 20; Water inlet 2001.
The specific embodiment
Embodiment 1
As shown in the figure, the present invention adopts the Frequency Induction Heating mode, based on the pressure Fundamentals of Welding, through the welding upset two rail to be welded is become one, and specifically comprises the steps (is example with the U71Mn rail):
1, prepares before the weldering.Utilize sander rail 6 end faces to be welded of polishing, and with the manual smart file of the file of cleaning, the file cleaning agent adopts carbon tetrachloride.Rail end face surface roughness after the polishing is the Ra12.5 micron, and the squareness tolerance of end face flatness and end face and rail axis is 0.15 millimeter.
2, utilize pressure welding machine 2 clampings rail 6 to be welded, and adjust the relative position of two rail 6 to be welded, make its end face alignment to be welded.Pressure welding machine 2 connects high-voltage electric oil pump 1 as power source.
3, intermediate frequency inductor 3 is supported on two guide pillars 201 of pressure welding machine 2, and makes intermediate frequency inductor 3 surround the end face to be welded of two rail 6 to be welded.Wherein, Intermediate frequency inductor 3 is made up of left and right hollow copper body 301,302; Said left and right hollow copper body 301,302 utilizes connector 8 to be connected to form the closed hoop of corresponding rail to be welded 6, and the surface configuration of left and right hollow copper body 301,302 corresponding rail 6 to be welded and rail to be welded 6 outer contour shapes adapt.Corresponding left and right hollow copper body 301,302 positions are respectively equipped with supporting carriage 9 on the guide pillar 201 of pressure welding machine 2; Said supporting carriage 9 by vehicle wheel frame 904, be installed in that vehicle wheel frame 904 belows match with the periphery of guide pillar 201 wheel 905, stand on vehicle wheel frame 904 tops double-screw bolt 902, be located at the adjusting nut 901 on the double-screw bolt 902, the vehicle frame 903 that is connected on the adjusting nut 901 is formed; Vehicle frame 903 has the strip hole 903b of the clamping position of end portion, supports body 903a and corresponding adjusting nut 901; Left and right hollow copper body 301,302 is respectively equipped with supporting base 301b, the 302b of the end portion, supports body 903a of corresponding vehicle frame 903, and supporting base 301b, 302b are provided with trip bolt 15 and utilize trip bolt 15 to be connected with the end portion, supports body 903a that inserts its inner vehicle frame 903.Unclamp trip bolt 15, rotate vehicle frame 903, regulate the angle of the end face to be welded of intermediate frequency inductor 3 and rail, make the cross section of intermediate frequency inductor 3 parallel, the trip bolt 15 of screwing again with the end face to be welded of rail; Rotate adjusting nut 901, can make vehicle frame 903, thereby regulate the upper and lower gap of intermediate frequency inductor 3 and rail 6 to be welded along double-screw bolt 902 upper and lower moving; Along the left and right mobile adjusting nut 901 of the strip hole 903b of vehicle frame 903, the gap, the left and right sides of scalable intermediate frequency inductor 3 and rail 6 to be welded; Finally making the intermediate frequency inductor 3 and left and right, the upper and lower gap of rail 6 to be welded is 29mm-31mm, in the present embodiment 30mm is adjusted in the intermediate frequency inductor 3 and left and right, the upper and lower gap of rail 6 to be welded.
4, intermediate frequency inductor 3 is connected with water-cooling system, and the power supply of opening water-cooling system is intermediate frequency inductor 3 cycle cooling waters.Said water-cooling system is made up of cooling water pump 5, the water tank 20 and the cooling water pipeline 12 that communicate with the water inlet of cooling water pump 5; The lower surface of said left and right hollow copper body 301,302 is respectively equipped with into, and water tubing string 301c, 302c, upper surface are respectively equipped with water outlet tubing string 301a, 302a; Water inlet tubing string 301c, 302c utilize cooling water pipeline 12 to link to each other with the delivery port 501 of cooling water pump 5; Water outlet tubing string 301a, 302a utilize cooling water pipeline 12 to link to each other with the water inlet 2001 of water tank 20; Make cooling water get into left and right hollow copper body 301,302, flow out left and right hollow copper body 301,302 and return water tank 20 by water outlet tubing string 301a, 302a through water inlet tubing string 301c, 302c; Transfer via cooling water pump 5 and to get into left and right hollow copper body 301,302 once more; Realize cooling water from bottom to top circulation in left and right hollow copper body 301,302, and then reach the purpose of cooling intermediate frequency inductor.
5, rail pushes up in advance.Connect the power supply of high-voltage electric oil pump 1, high-voltage electric oil pump 1 slowly loaded, the force value on the inspection Pressure gauge, reach setting value after, stop loading, the end face to be welded of two rail 6 to be welded is fitted tightly.
6, the end region to be welded that adopts intermediate frequency inductor 3 to treat welding steel rail 6 heats.The intermediate frequency power supply 10 that utilizes power line 11 to connect intermediate frequency inductor 3 makes it that alternating current is provided; And the operating power of regulating intermediate frequency inductor 3 reaches 28kW at least; The operating power of present embodiment intermediate frequency inductor 3 is 28 kW; Make the end face part to be welded of rail 6 to be welded produce alternating flux, the rail 6 inner vortex flows that produce to be welded realize heating.Be 40～50s heat time heating time, and be controlled at 40s heat time heating time in the present embodiment.The power supply of the power supply of intermediate frequency power supply 10, high-voltage electric oil pump 1 and infrared radiation thermometer 4 all is arranged in the same electrical power control cabinet 7.
7, upset.When the end region to be welded that utilizes infrared radiation thermometer 4 to detect rail 6 to be welded is heated to 1220 ℃-1280 ℃ of welding upset initial temperatures, the action of beginning upset.When infrared temperature measurer 4 detects end region temperature to be welded and reaches 1250 ℃, high-voltage electric oil pump 1 is loaded fast in this enforcement, drive the piston action of pressure welding machine 2; Treat welding steel rail 6 and realize the welding upset, upset speed is 0.004m/s, when weld seam produces convexity; Note observing the upset amount; Different according to the rail type, the upset amount is controlled at 27 mm～35mm, and the rail type of the rail to be welded that adopts in the present embodiment (U71Mn rail) does
50kg/m,The upset amount is controlled at 27mm, and the 10-15 of this upset step after heating stops to accomplish in second, and after heating stopped in the present embodiment, the upset step deadline was 10 seconds.
8, push away knurl.When the upset amount reaches requirement, intermediate frequency inductor 3 is pushed away weld seam, close intermediate frequency power supply 10, upset finishes.On the big support 202 of pressure welding machine 2, pushing convex knife is installed; High-voltage electric oil pump 1 is loaded, and the big support 202 of pressure welding machine 2 drives the overlap 14 of pushing convex knife to the steel rail welding line place and advances, and overlap 14 is turned down; Close the power supply of high-voltage electric oil pump 1 then, accomplish pushing away knurl.Wherein pushing convex knife is made up of a cutter 16, broadsword 17, flange of rail cutter 18, utilizes pushing convex knife pad 19 to be placed on the big support 202 of pressure welding machine 2 after being assembled on the pushing convex knife pad 19.
9, remove intermediate frequency inductor 3 and pressure welding machine 2, accomplish welding.
Rail to after the welding carries out drop weight test, quiet curved test, tension test, impact test, fatigue test, and test data is following:
Result of the test shows, good through the Medium frequency induction welding method welding quality of intermediate frequency inductor heating, pressure welding machine upset, the commissure does not have casting flaw, easy fracture not, and compression strength is high.
The Medium frequency induction welding method of this rail specifically comprises the steps (is example with the U75V rail):
1, prepares before the weldering.
2, utilize pressure welding machine 2 clampings rail 6 to be welded.
3, intermediate frequency inductor 3 is supported on two guide pillars 201 of pressure welding machine 2, and makes intermediate frequency inductor 3 surround the end face to be welded of two rail 6 to be welded.Adjustment intermediate frequency inductor 3 is 29mm with left and right, the upper and lower gap of rail 6 to be welded.
4, intermediate frequency inductor 3 is connected with water-cooling system, and the power supply of opening water-cooling system is intermediate frequency inductor 3 cycle cooling waters.
5, rail pushes up in advance.
6, the end region to be welded that adopts intermediate frequency inductor 3 to treat welding steel rail 6 heats.The intermediate frequency power supply 10 that utilizes power line 11 to connect intermediate frequency inductor 3 makes it that alternating current is provided; And the operating power of regulating intermediate frequency inductor 3 reaches 30kW; Make the end face part to be welded of rail 6 to be welded produce alternating flux, the rail 6 inner vortex flows that produce to be welded realize heating.Be controlled at 45s heat time heating time.
7, upset.When infrared temperature measurer 4 detects end region temperature to be welded and reaches 1220 ℃, high-voltage electric oil pump 1 is loaded fast, drive the piston action of pressure welding machine 2; Treat welding steel rail 6 and realize the welding upset; Upset speed is 0.005m/s, and the rail type of the rail to be welded that adopts in the present embodiment is 60kg/m, and the upset amount is controlled at 30mm; After heating stopped, the upset step deadline was 13 seconds.
8, push away knurl.
9, remove intermediate frequency inductor 3 and pressure welding machine 2, accomplish welding.Other are with embodiment 1.
Rail to after the welding carries out drop weight test, quiet curved test, tension test, impact test, fatigue test, and test data is following:
The Medium frequency induction welding method of this rail specifically comprises the steps (is example with the PG4 rail):
1, prepares before the weldering.
2, utilize pressure welding machine 2 clampings rail 6 to be welded.
3, intermediate frequency inductor 3 is supported on two guide pillars 201 of pressure welding machine 2, and makes intermediate frequency inductor 3 surround the end face to be welded of two rail 6 to be welded.Adjustment intermediate frequency inductor 3 is 31mm with left and right, the upper and lower gap of rail 6 to be welded.
4, intermediate frequency inductor 3 is connected with water-cooling system, and the power supply of opening water-cooling system is intermediate frequency inductor 3 cycle cooling waters.
5, rail pushes up in advance.
6, the end region to be welded that adopts intermediate frequency inductor 3 to treat welding steel rail 6 heats.The intermediate frequency power supply 10 that utilizes power line 11 to connect intermediate frequency inductor 3 makes it that alternating current is provided; And the operating power of regulating intermediate frequency inductor 3 reaches 35kW; Make the end face part to be welded of rail 6 to be welded produce alternating flux, the rail 6 inner vortex flows that produce to be welded realize heating.Be controlled at 50s heat time heating time.
7, upset.When infrared temperature measurer 4 detects end region temperature to be welded and reaches 1280 ℃; High-voltage electric oil pump 1 is loaded fast, drive the piston action of pressure welding machine 2, treat welding steel rail 6 and realize the welding upset; Upset speed is 0.006m/s, and the rail type of the rail to be welded that adopts in the present embodiment does
75kg/m,The upset amount is controlled at 35mm, and after heating stopped, the upset step deadline was 15 seconds.
8, push away knurl.
9, remove intermediate frequency inductor 3 and pressure welding machine 2, accomplish welding.Other are with embodiment 1.
Rail to after the welding carries out drop weight test, quiet curved test, tension test, impact test, fatigue test, and test data is following:
Claims (10)
1. the Medium frequency induction welding method of a rail is characterized in that, comprises the steps:
1), utilizes pressure welding machine clamping rail to be welded; The end region to be welded that adopts intermediate frequency inductor to treat the welding steel rail heats; Whether the heating-up temperature of utilizing infrared radiation thermometer to detect end region to be welded in the heating process reaches welding upset initial temperature, and said intermediate frequency inductor is connected with intermediate frequency power supply and water-cooling system;
2), treat the welding steel rail and realize the welding upset.
2. the Medium frequency induction welding method of rail according to claim 1; It is characterized in that: before the heating; Said intermediate frequency inductor is supported on the guide pillar of pressure welding machine and surrounds the end face to be welded of two rail to be welded, and the gap of regulating intermediate frequency inductor and rail to be welded is to 29-31mm.
3. the Medium frequency induction welding method of rail according to claim 1, it is characterized in that: said welding upset initial temperature is 1220 ℃-1280 ℃.
4. the Medium frequency induction welding method of rail according to claim 1, it is characterized in that: be 40～50s the heat time heating time of said intermediate frequency inductor.
5. the Medium frequency induction welding method of rail according to claim 1, it is characterized in that: the upset amount is controlled at 27 mm～35mm.
6. the Medium frequency induction welding method of rail according to claim 1 is characterized in that: weld the 10-15 of upset after heating stops and accomplishing in second.
7. the Medium frequency induction welding method of rail according to claim 1; It is characterized in that: said intermediate frequency inductor is made up of left and right hollow copper body; Said left and right hollow copper body utilizes connector to be connected to form the closed hoop of corresponding rail to be welded, and the surface configuration and the rail outer contour shape to be welded of the corresponding rail to be welded of said left and right hollow copper body adapt.
8. the Medium frequency induction welding method of rail according to claim 7; It is characterized in that: said water-cooling system is made up of cooling water pump, the water tank and the cooling water pipeline that communicate with the water inlet of cooling water pump; The lower surface of said left and right hollow copper body is respectively equipped with into, and water tubing string, upper surface are respectively equipped with the water outlet tubing string; Said water inlet tubing string utilizes cooling water pipeline to link to each other with the delivery port of cooling water pump; Said water outlet tubing string utilizes cooling water pipeline to link to each other with the water inlet of water tank; Make cooling water get into left and right hollow copper body, flow out left and right hollow copper body and return water tank, transfer via cooling water pump and get into left and right hollow copper body once more, realize cooling water from bottom to top circulation in left and right hollow copper body by the water outlet tubing string through the water inlet tubing string.
9. the Medium frequency induction welding method of rail according to claim 7; It is characterized in that: corresponding left and right hollow copper body position is respectively equipped with supporting carriage on the guide pillar of said pressure welding machine; Said supporting carriage by vehicle wheel frame, be installed in that vehicle wheel frame below matches with the periphery of guide pillar wheel, stand on double-screw bolt above the vehicle wheel frame, be located at the adjusting nut on the double-screw bolt, the vehicle frame that is connected on the adjusting nut is formed; Said vehicle frame is provided with the strip hole of the clamping position of end portion, supports body and corresponding adjusting nut; Said left and right hollow copper body is respectively equipped with the supporting base of the end portion, supports body of corresponding vehicle frame, and said supporting base is provided with trip bolt and utilizes trip bolt to be connected with the end portion, supports body that inserts its inner vehicle frame.
10. the Medium frequency induction welding method of rail according to claim 1; It is characterized in that: after the welding upset is accomplished; Utilize the pushing convex knife pad that pushing convex knife is installed on the big support of pressure welding machine; Pressure welding machine drives said pushing convex knife the overlap at steel rail welding line place is turned down, and said pushing convex knife is by being made up of a cutter, broadsword, flange of rail cutter.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103495800A (en) * | 2013-09-29 | 2014-01-08 | 常州市瑞泰工程机械有限公司 | Steel rail induction butt welding and heat treatment device |
| CN104357641A (en) * | 2014-10-24 | 2015-02-18 | 中国铁道科学研究院 | Steel rail postwelding pressure maintaining and normalizing equipment and steel rail postwelding pressure maintaining and normalizing method thereof |
| CN106862721A (en) * | 2017-03-01 | 2017-06-20 | 上海带轨道焊接科技有限公司 | A kind of fixed medium frequency inverter direct current rail welding machine |
| GB2551394A (en) * | 2016-06-17 | 2017-12-20 | Mirage Ltd | Railway rail induction-welding device |
| CN108149533A (en) * | 2017-12-18 | 2018-06-12 | 中国铁道科学研究院金属及化学研究所 | A kind of method for improving WELDING JOINT intensity |
| WO2019067870A1 (en) * | 2017-09-29 | 2019-04-04 | CF&I Steel L.P. D/B/A EVRAZ Rocky Mountain Steel | Method for joining steel rails with controlled weld heat input |
| CN111678948A (en) * | 2020-06-02 | 2020-09-18 | 四川大学 | High-speed nondestructive detection method for surface defects of steel rail and implementation device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104357641A (en) * | 2014-10-24 | 2015-02-18 | 中国铁道科学研究院 | Steel rail postwelding pressure maintaining and normalizing equipment and steel rail postwelding pressure maintaining and normalizing method thereof |
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| US11519135B2 (en) | 2016-06-17 | 2022-12-06 | Mirage Ltd | Railway rail induction-welding device |
| CN106862721A (en) * | 2017-03-01 | 2017-06-20 | 上海带轨道焊接科技有限公司 | A kind of fixed medium frequency inverter direct current rail welding machine |
| WO2019067870A1 (en) * | 2017-09-29 | 2019-04-04 | CF&I Steel L.P. D/B/A EVRAZ Rocky Mountain Steel | Method for joining steel rails with controlled weld heat input |
| US10851436B2 (en) | 2017-09-29 | 2020-12-01 | Cf&I Steel L.P. | Method for joining steel rails with controlled weld heat input |
| CN108149533A (en) * | 2017-12-18 | 2018-06-12 | 中国铁道科学研究院金属及化学研究所 | A kind of method for improving WELDING JOINT intensity |
| CN111678948A (en) * | 2020-06-02 | 2020-09-18 | 四川大学 | High-speed nondestructive detection method for surface defects of steel rail and implementation device thereof |
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