CN100395073C - Control method of mobile steel rail pneumatic welding machine and its used equipment - Google Patents
Control method of mobile steel rail pneumatic welding machine and its used equipment Download PDFInfo
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- CN100395073C CN100395073C CNB021132836A CN02113283A CN100395073C CN 100395073 C CN100395073 C CN 100395073C CN B021132836 A CNB021132836 A CN B021132836A CN 02113283 A CN02113283 A CN 02113283A CN 100395073 C CN100395073 C CN 100395073C
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Abstract
The present invention discloses a control method and a device of a mobile steel rail gas pressure welding machine. The control method of a mobile steel rail gas pressure welding machine uses a steel rail gas pressure welding machine to weld steel rails, the relative expansion displacement quantity, the compression displacement quantity and the upsetting displacement quantity of the steel rails are monitored through a displacement sensor, a displacement transducer and a recorder, the process pressure of welding and the welding upsetting force are monitored through a pressure sensor and a recorder, and the progresses of depressurization and heading technique are controlled by monitoring data of a displacement sensor, a displacement transducer and a pressure sensor. Besides, the present invention also comprises the device for realizing the control method. The control method has the advantage that the control method enhances the automation level of the mobile steel rail gas pressure welding machine, enhances the welding accuracy of steel rails, and enhances the qualified rate of drop hammer tests for steel rail welding joints.
Description
Technical field
The invention belongs to railway track gas pressure welder control technology field, particularly relate to a kind of control method and equipment of mobile steel rail gas pressure welder.
Background technology
In the prior art, general complete mobile gas pressure welding of rail machine by press-connection machine, high-pressure oil pump, heater, push away knurl device, gas flow control cabinet and cooling water recirculation system and form.The mobile steel rail gas-pressure welding machine is divided into folder waist formula and folder flange of rail formula, press-connection machine mainly is to clamp two velamen welding steel rails, fix its relative position, the upset force when heating in the gas pressure welding termination process is provided, guarantee that the rail joint end face welds and postwelding is finished the requirement that pushes away knurl.This gas pressure welder can pass through TB/T2622.1-95 " mobile steel rail gas pressure welder equipment press-connection machine technical conditions ", " 75Kg/m total length head hardened rail small pneumatic weldering research " (railway construction, 1999, No.4, P29-P31), " mobile steel rail gas pressure welding connection technology and application " (compile scientific research institution, Shenyang Railway Bureau Jinzhou, in February, 1994, P3-P9), " research of the long rail movable small of railway gas pressure welder " literature such as (Ma Zhenglin, scientific research institutions, Shenyang Railway Bureau Jinzhou) arrives.In actual applications, because welding machine does not have automation record and control device, rail welding is entirely by operating personnel's operation by rule of thumb, welding decompression and key process parameters such as upset operating procedure, upset amount are judged by perusal in the welding process, automaticity is low, the technology poor reproducibility causes the fluctuation of postwelding rail joint drop weight test qualification rate big, the quality of weld joint instability.
Summary of the invention
Technical problem to be solved by this invention is to have increased control device at the problems referred to above on the basis of former common mobile steel rail gas pressure welder, has taked the control corresponding method.
Technical problem to be solved by this invention is achieved through the following technical solutions: the control method of mobile steel rail gas pressure welder, use the gas pressure welding of rail machine that rail is welded, relative expansion displacement, compression displacement amount and the upset displacement of rail are monitored by displacement transducer, displacement transducer and recorder; By pressure sensor and recorder welding process pressure, welding upset force are monitored; Utilize the monitor data control decompression of displacement transducer, displacement transducer and pressure sensor, the process of top forging process step.
The step of this control method is:
(1), to apply preload pressure by pressure sensor control rail two ends be 25-26MPa, and adjusts the leading zero's position of displacement transducer this moment;
(2), rail is heated, the rail expanded by heating produces outside expansion displacement, and when being heated to the rail plastic deformation point, rail begins to shrink, and produces inside contraction displacement, by the change in displacement of displacement transducer detection rail with heater;
(3), when displacement transducer is returned to the leading zero's position, enter the welding sequence of rail, the rail pressure at two ends is reduced to 15-17MPa;
(4), rail is continued heating, rail continues to shrink, and when the displacement of displacement transducer is retracted to apart from leading zero's position 2.5-4mm, enters the upset operation of welding, and the pressure at rail two ends is added to maximum.
(5), when the displacement of displacement transducer in the upset operation reaches 30-35mm, shed the pressure at rail two ends, finish the upset operation.
In order to realize control method of the present invention, the equipment that is adopted comprises the mobile steel rail gas pressure welder, between left crossbeam and right crossbeam displacement transducer is installed, on the oil circuit of oil cylinder pressure sensor is installed, above-mentioned pressure sensor links to each other with recorder respectively with displacement transducer.
Adopt the present invention to improve the automatization level of welding machine, not only can guarantee accurately to control decompression in the welding process, upset, push away technological operation step such as knurl, relative expansion displacement, compression displacement amount, upset displacement, welding process pressure, welding upset force, the postwelding of realizing rail in the welding process pushes away time real monitoring and the record of knurl upset force; And can improve the reappearance of gas pressure welding technology, and guarantee the qualification rate of joint postwelding drop weight test, improve the steel rail weld joint quality.
Compared with prior art, the present invention has the following advantages:
1, in the rail welding process, can accurately control the welding procedure operation according to the variation of measured displacements amount, improved the automatization level of mobile steel rail gas pressure welding welding machine.
2, overcome and judge by artificial experience and to reduce pressure, upset, push away the drawback of welding procedure operation such as knurl, reduced the man's activity of operation, improved the welding accuracy of rail.
3, reliable and stable, the favorable reproducibility of welding procedure has improved the qualification rate of steel rail weld joint drop weight test.
4, accurately write down important technical parameters such as displacement, upset amount and upsetting force in the gas pressure welding of rail process, and can judge the welding quality of rail joint according to this.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the front view of mobile steel rail gas pressure welder of the present invention;
Fig. 2 is the vertical view of the mobile steel rail gas pressure welder of Fig. 1;
Fig. 3 is the control system schematic diagram of mobile steel rail gas pressure welder of the present invention.
The specific embodiment
The working host of mobile steel rail gas pressure welder is a press-connection machine, and press-connection machine comprises and being installed on the guide pillar 6 and movably left crossbeam 1 and right crossbeam 2 that displacement transducer 3 is installed on left crossbeam 1 and the right crossbeam 2.Displacement transducer 3 is connected on the recorder by displacement transducer.Oil pump is provided with pressure sensor with the oil circuit that is connected of oil cylinder, and pressure sensor also is connected on the recorder.Recorder adopts a kind of of function recording instrument, recording instrument without paper or computer, and recorder plays record and shows the effect of the measured data of sensor.
Displacement transducer is a DC-DC LVDT displacement transducer, and its range is 0-200mm; Described pressure sensor range is 0-60MPa.
The displacement transducer 3 that employing is installed on the mobile steel rail gas pressure welder, displacement transducer are monitored relative expansion displacement, compression displacement amount and the upset displacement of rail 4; By pressure sensor welding process pressure, welding upset force are monitored; Utilize the monitor data control decompression of displacement transducer, displacement transducer and pressure sensor, the process of top forging process step.Further can also control the work that pushes away the knurl process.
The control method of mobile steel rail gas pressure welder may further comprise the steps:
(1), to apply preload pressure by pressure sensor control rail two ends be 25-26MPa, and adjusts the leading zero's position of displacement transducer this moment;
(2), rail is heated, the rail expanded by heating produces outside expansion displacement, and when being heated to the rail plastic deformation point, rail begins to shrink, and produces inside contraction displacement, by the change in displacement of displacement transducer detection rail with heater;
(3), when displacement transducer is returned to the leading zero's position, enter the welding decompression operation of rail, the rail pressure at two ends is reduced to 15-17MPa;
(4), rail is continued heating, rail continues to shrink, and when the displacement of displacement transducer is retracted to apart from leading zero's position 2.5-4mm, enters the upset operation of welding, and the pressure at rail two ends is added to maximum.
(5), when the displacement of the displacement transducer when the upset displacement reaches 30-35mm, shed the pressure at rail two ends, finish the upset operation.
After finishing the upset operation, push away the knurl operation.
Embodiment 1
Opened high-pressure oil pump by end mill and artificial filing are pretreated by welding steel rail 4 press-connection machine of packing into two, adjust, guarantee to push away the knurl device and successfully push away except that overlap by the distance of 2 on the position while welding of welding steel rail 4 and press-connection machine left side crossbeam 1 and right crossbeam.The hold-down bolt of formula press-connection machine is tightened the tread bolt at the bottom of the web of the rail wedge 5 of urgent folder waist formula press-connection machine or the screw down clips, guarantee by welding steel rail 4 up and down and left and right sides glacing flatness.Put into and push away the celectome pad,, prepare for postwelding pushes away knurl near press-connection machine left side crossbeam 1.Open the instrument power supply power supply, select the input signal range of recorder, recorder is returned to zero in advance.Open high-pressure oil pump, the pre-oiling pressure pressure is adjusted the leading zero's position of displacement signal under current pressure to 26MPa.Oxygen one acetylene or liquefied petroleum gas fired heater 7 are installed and are connected, shake by rocking handle heater 7 is horizontally slipped on guide pillar 6 with the wabbler mechanism of press-connection machine.Reach 1.0--1.1 by gas flow control cabinet high speed oxygen and acetylene gas (or liquefied petroleum gas) volume ratio, flow reaches 3.7--3.8M3/h.After the igniting, shake the distance range of heater 7 heating rail 4 weld seams 8 left and right sides 10--15mm.With the raising of heating-up temperature, rail 4 progressively begins expanded by heating, produces expansion displacement.When rail 4 was heated to plastic deformation point, displacement began to shrink, and when the displacement contraction is returned to the leading zero's position (recorder demonstration), carried out decompression operation immediately, reduced oil pressure pressure to 16MPa.Continue heating, when recorder shows that the steel rail displacement piezometric is reduced to apart from leading zero's position 2.5mm, carry out the upset operation immediately, farthest open the high-pressure oil pump valve and carry out upset.When recorder shows that the upset amount reaches 32mm, close the high-pressure oil pump valve and stop upset.Enter the knurl program that pushes away at last, unclamp press-connection machine left side crossbeam 1 tread bolt rapidly, beat loose left crossbeam web of the rail wedge 5, the commutation of high-pressure oil pump valve retreats press-connection machine, puts into and pushes away the celectome frame, closes oxygen one acetylene or liquefied petroleum gas valve, the high-pressure oil pump commutation pushes away knurl, pushes away the overlap that removes protuberance.
Embodiment 2
Opened high-pressure oil pump by end mill and artificial filing are pretreated by welding steel rail 4 press-connection machine of packing into two, adjust, guarantee to push away the knurl device and successfully push away except that overlap by the distance between weld seam 8 positions of welding steel rail 4 and press-connection machine left side crossbeam 1 and the right crossbeam 2.But the hold-down bolt of formula press-connection machine is tightened the tread bolt at the bottom of the web of the rail wedge of urgent folder waist formula press-connection machine or the screw down clips, guarantee by welding steel rail 4 up and down and left and right sides glacing flatness.Put into and push away the celectome pad,, prepare for postwelding pushes away knurl near press-connection machine left side crossbeam.Open the instrument power supply power supply, select the input signal range of recorder, recorder is returned to zero in advance.Open high-pressure oil pump, the pre-oiling pressure pressure is adjusted the leading zero's position of displacement signal under current pressure to 26MPa.Oxygen one acetylene or liquefied petroleum gas fired heater 7 are installed and are connected, shake by rocking handle heater 7 is horizontally slipped on guide pillar 6 with the wabbler mechanism of press-connection machine.Reach 1.0--1.1 by gas flow control cabinet adjustment oxygen and acetylene gas (or liquefied petroleum gas) ratio, flow reaches 3.7--3.8M3/h.After the igniting, shake the distance range of weld seam 8 left and right sides 10--15mm of heater 7 heating rail 4.With the raising of heating-up temperature, rail 4 progressively begins expanded by heating, produces expansion displacement.When rail was heated to plastic deformation point, displacement began to shrink, and when the displacement contraction is returned to the leading zero's position (recorder demonstration), carried out decompression operation immediately, reduced oil pressure pressure to 16MPa.Continue heating, when recorder shows that the steel rail displacement piezometric is reduced to apart from leading zero's position 3.5mm, carry out the upset operation immediately, farthest open the high-pressure oil pump valve and carry out upset.When recorder shows that the upset amount reaches 34mm, close the high-pressure oil pump valve and stop upset.Enter the knurl program that pushes away at last, unclamp press-connection machine left side crossbeam 1 tread bolt rapidly, beat loose left crossbeam web of the rail wedge 5, the commutation of high-pressure oil pump valve retreats press-connection machine, puts into and pushes away the celectome frame, closes oxygen one acetylene or liquefied petroleum gas valve, the high-pressure oil pump commutation pushes away knurl, pushes away the overlap that removes protuberance.
Claims (8)
1. the control method of a mobile steel rail gas pressure welder, use the gas pressure welding of rail machine that rail is welded, it is characterized in that: relative expansion displacement, compression displacement amount and the upset displacement of rail are monitored by displacement transducer, displacement transducer and recorder; By pressure sensor and recorder welding process pressure, welding upset force are monitored; Utilize the monitor data control decompression of displacement transducer, displacement transducer and pressure sensor, the process of top forging process step.
2. the control method of a kind of mobile steel rail gas pressure welder as claimed in claim 1 is characterized in that: the monitoring of displacement transducer, displacement transducer and pressure sensor comprises and pushes away the knurl operation.
3. the control method of a kind of mobile steel rail gas pressure welder as claimed in claim 1 or 2 is characterized in that: use the recorder record in the monitoring of displacement transducer, displacement transducer and pressure sensor.
4. the control method of a kind of mobile steel rail gas pressure welder as claimed in claim 3 is characterized in that: recorder adopts a kind of in function recording instrument, recording instrument without paper or the computer.
5. the control method of a kind of mobile steel rail gas pressure welder as claimed in claim 1 is characterized in that: described displacement transducer is a DC-DC LVDT displacement transducer, and its range is 0-200mm; Described pressure sensor range is 0-60MPa.
6. the control method of a kind of mobile steel rail gas pressure welder as claimed in claim 1, described method may further comprise the steps:
(1), to apply preload pressure by pressure sensor control rail two ends be 25-26MPa, and adjusts the leading zero's position of displacement transducer this moment;
(2), rail is heated, the rail expanded by heating produces outside expansion displacement, and when being heated to the rail plastic deformation point, rail begins to shrink, and produces inside contraction displacement, by the change in displacement of displacement transducer detection rail with heater;
(3), when displacement transducer is returned to the leading zero's position, enter the welding sequence of rail, the rail pressure at two ends is reduced to 15-17MPa;
(4), rail is continued heating, rail continues to shrink, and when the displacement of displacement transducer is retracted to apart from leading zero's position 2.5-4mm, enters the upset operation of welding;
(5), when the displacement of displacement transducer in the upset operation reaches 30-35mm, shed the pressure at rail two ends, finish the upset operation.
7. the control method of a kind of mobile steel rail gas pressure welder as claimed in claim 6 is characterized in that: after described (5) step is finished the upset operation, also push away the knurl operation.
8. the equipment that control method adopted of a kind of mobile steel rail gas pressure welder as claimed in claim 1, comprise the mobile steel rail gas pressure welder, it is characterized in that: between left crossbeam (1) and right crossbeam (2), displacement transducer (3) is installed, on the oil circuit of oil cylinder pressure sensor is installed, above-mentioned pressure sensor links to each other with recorder respectively with displacement transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021132836A CN100395073C (en) | 2002-01-29 | 2002-01-29 | Control method of mobile steel rail pneumatic welding machine and its used equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021132836A CN100395073C (en) | 2002-01-29 | 2002-01-29 | Control method of mobile steel rail pneumatic welding machine and its used equipment |
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| Publication Number | Publication Date |
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| CN1718355A CN1718355A (en) | 2006-01-11 |
| CN100395073C true CN100395073C (en) | 2008-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021132836A Expired - Fee Related CN100395073C (en) | 2002-01-29 | 2002-01-29 | Control method of mobile steel rail pneumatic welding machine and its used equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101761002B (en) * | 2009-12-17 | 2012-06-27 | 中国铁道科学研究院金属及化学研究所 | Steel rail welding joint heat treatment device and heater thereof |
| CN108620706A (en) * | 2018-05-14 | 2018-10-09 | 广东迈诺工业技术有限公司 | A kind of electrical autocontrol crimping soldering method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210798U (en) * | 1987-12-04 | 1988-08-10 | 沈阳铁路局科学技术研究所 | Isobar type rail gas-welding machine |
| CN2206696Y (en) * | 1994-06-20 | 1995-09-06 | 南京铁路分局南京线桥大修段 | Moving rail pressure welding machine with push tumour |
| CN2242755Y (en) * | 1995-11-20 | 1996-12-18 | 蔡绍文 | Moving-type gas-pressure welding apparatus for steel rail |
| JPH10166163A (en) * | 1996-12-04 | 1998-06-23 | Toatsu Rocky:Kk | Method for controlling automatic gas pressure-welding equipment |
| US6201216B1 (en) * | 1999-07-19 | 2001-03-13 | Lincoln Global, Inc. | Method and system for welding railroad rails |
-
2002
- 2002-01-29 CN CNB021132836A patent/CN100395073C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210798U (en) * | 1987-12-04 | 1988-08-10 | 沈阳铁路局科学技术研究所 | Isobar type rail gas-welding machine |
| CN2206696Y (en) * | 1994-06-20 | 1995-09-06 | 南京铁路分局南京线桥大修段 | Moving rail pressure welding machine with push tumour |
| CN2242755Y (en) * | 1995-11-20 | 1996-12-18 | 蔡绍文 | Moving-type gas-pressure welding apparatus for steel rail |
| JPH10166163A (en) * | 1996-12-04 | 1998-06-23 | Toatsu Rocky:Kk | Method for controlling automatic gas pressure-welding equipment |
| US6201216B1 (en) * | 1999-07-19 | 2001-03-13 | Lincoln Global, Inc. | Method and system for welding railroad rails |
Non-Patent Citations (2)
| Title |
|---|
| 移动式钢轨气压焊. 叶文博，68-76，中国铁道出版社出版. 1987 |
| 移动式钢轨气压焊. 叶文博，68-76，中国铁道出版社出版. 1987 * |
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