CN104493345B - Pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system and control method thereof - Google Patents
Pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system and control method thereof Download PDFInfo
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- CN104493345B CN104493345B CN201410661869.0A CN201410661869A CN104493345B CN 104493345 B CN104493345 B CN 104493345B CN 201410661869 A CN201410661869 A CN 201410661869A CN 104493345 B CN104493345 B CN 104493345B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Abstract
The pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system that type of the present invention provides, owing to applying proportional pressure control valve and ratio solenoid directional control valve, pressure sensor, electrical control, the system that solder technology combines, the blind area pressure of proportional pressure control valve can be acted on the initial pressure off-load reduction of master cylinder, the initial pressure making master cylinder is not enough to steel plate and machinery position thereof are caused damage, thus solve super thick degree in prior art, ultra-thin, extra small, super large-scale difficulty controls the steel pipe of welding quality, solve occur be bent and be forced out vestige or misalignment occurs when steel-pipe welding moves and the problem such as cannot weld, dramatically saves on cost human resources, and decrease the percent defective of steel plate, achieve automation greatly, improve production efficiency.
Description
Technical field
The type of the invention belongs to belongs to the pre-welding machine made of steel tubes control system technical field of tubulation industry, be specifically related to the steel pipe of various different size automatic welding steel pipe whole during be tracked adjusting eliminate weld defect and welding in welding process time the pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system of misalignment and control method thereof.
Background technology
Prewelding is not had in longitudinal submerged arc welded pipe in one's early years produces, until second generation UOE welded pipe units just starts to have emerged in large numbers Prewelding machine, but prewelding now is discontinuous welding, spacing about 300mm, arrive the third generation (asking for 1968～1979) of UOE welded pipe units development, prewelding has obtained great emphasis and development, form will become form successively the most successively, and the pre-welding technology in this stage is that contemporary pre-welding technology is laid a good foundation.Also the development of pre-welding technology can be reflected from the quality standard of steel pipe, in up-to-date relevant ocean, in 6.3 sections of low gentle acid condition pipe standards IS03183 3 and GB/T9711.3, the most clearly propose to disapprove employing intermittent point welding, indicated the prewelding form main property to steel pipe quality.
At present, along with the smooth enforcement of China's transfering natural gas from the west to the east project, growing to the demand of gas pipeline, simultaneously the strictest to the quality requirement of gas pipeline.Pre-welding machine made of steel tubes in large-size pipe processing, welding equipment is the crucial special equipment in conveying oil, gas steel pipes with straight production line, its effect has following: if Welding Problems is not reaching to required weld strength in oil, gas course of conveying, its economic loss is inestimable.Welding decides the quality of steel pipe welded seam in welding process, intensity plays an important role, different size according to caliber makes up to relevant standard or uses requirement, pre-welding machine made of steel tubes welded in welding process in the past is all manually to be adjusted, also consumptive material of not only mistaking when welding also takes human resources, and in welding quality, most of welding finished products all do not reach the requirement of tube quality yet.Form these reasons and have the 2 articles: 1st article: in welding, carry out human weld, when human weld due to welding can produce substantial amounts of welding bubble, also producing weldering mist, that the eyesight influence of people is added labour intensity is big, in long welding process, the work muscle power of people also can decline welding quality and also can decline, the welding bubble that simultaneously produces due to welding in welding process and make whole welded seam quality to ensure.Article 2: electrical control and hydraulic system have employed operation switch control rule and electro-hydraulic reversing valve control, suppress steel pipe time be unable to reach synchronization or check pressure time can only see that Pressure gauge and empirical value operate artificially.The steel tube surface that can make different size in pressing process damage, deform or weld on the problem such as defective have a strong impact on quality, be also that whole steel pipe cancels.Also can not be adjusted because of when using electro-hydraulic reversing valve in pressure release at system decompression and return, during pressure release, reversal valve moment commutates and produces impulsive sound, while the moment that drain charge impact produces, oil return line also creates a large amount of oil film and affect the stability of whole lathe, also have impact on whole lathe welding quality in welding process and use, the requirement for operator is the highest.Cannot ensure in the quality of welding due to Artificial Control and operation in welding process, be simply controlled quality problems by detection methods, with operation, Artificial Control cannot ensure that steel pipe occurs the problems such as defect on welding.Also because detection methods is limited and be also a kind of waste greatly on manpower and resource, producing and processing cost is also greatly improved, the productive profit brought is the most limited.
Summary of the invention
The technical problem to be solved be provide for shortcoming of the prior art a kind of both can follow the tracks of in welded still pipe overall process be monitored welding quality and pressure constantly, the change of weld seam can be according to the pressure of welding and the most even standard of the quality weld seam of welding, eliminating after terminating the pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system of the impact produced in pressure leak process because of pressurize, the present invention also provides for the control method of above-mentioned pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system again.
Adopt the following technical scheme that for solving the technical problem of the present invention
A kind of pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system, including the infrared inspection sensor being connected with pre-welding machine made of steel tubes head, described infrared inspection sensor and PLC connect through the conversion of PLC information and carry out operation screen control, described operation screen mainly realizes human-computer exchange information, and described operation screen joint steel pipe Prewelding machine welding gun is followed the tracks of and driven motor；nullAlso include welded still pipe is suppressed pressure-retaining system，Described pressure-retaining system of suppressing welded still pipe is included in Set scale pressure valve on pre-welding machine made of steel tubes master cylinder and welding pressure roller oil cylinder oil inlet pipeline，Proportional pressure valve data signal be transferred to analog signal be transferred to operation screen realize control pre-welding machine made of steel tubes master cylinder in-line pressure size，Described proportional pressure valve and ratio solenoid directional control valve connect with pressure sensor respectively，By pressure sensor, by PLC, data signal is converted into by the pressure of collection and uninterrupted analog information to be transferred to operate screen and be controlled，Described ratio solenoid directional control valve is converted by PLC signal and is transferred to operation screen，Ratio solenoid directional control valve is by controlling the size of welding pressure roller joint close pressure，Ratio solenoid directional control valve by pressure on the number signal be converted into analog information be transferred to operation screen control constantly ratio commutation openings of sizes control the welding quality that pressure roller is pressed in welding process，Described ratio solenoid directional control valve is connected with pressure sensor，Described pressure sensor is separately positioned on oil-in and the welding pressure roller oil cylinder oil inlet mouth of the master cylinder of pre-welding machine made of steel tubes，Described pressure sensor is connected with operation screen.
The model of described infrared inspection sensor is VDM18-300/20/88/122/151.
Epicoele safety valve the most in parallel and cavity of resorption safety valve on described pre-welding machine made of steel tubes master cylinder in-line and welding pressure roller oil cylinder oil inlet pipeline; carry out system pressure safeguard protection; it is provided with proportional pressure control valve at oil pump oil-out and carries out principal pressure control; it is respectively equipped with ratio solenoid directional control valve and pressure sensor at pre-welding machine made of steel tubes master cylinder in-line and outlet line, is respectively controlled and detects oil stream size and the pressure size of in-line pipeline and welding pressure roller oil cylinder oil inlet pipeline.
Described infrared inspection sensor is connected with the image pick-up card controlling machine, and the image pick-up card of described control machine connects PLC and operation screen.
A kind of control method of pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system, the monitoring of steel pipe seam situation and welding quality treated by described infrared inspection sensor when pre-welding machine made of steel tubes welds, the image pick-up card feedback controlling machine being connected by PLC with infrared inspection sensor treats that the internal groove form parameter of welding line is transferred to operation screen, operation screen controls to adjust the position of welding and the size of groove, digital given unit is converted into pulse signal transmission and follows the tracks of driving motor to pre-welding machine made of steel tubes welding gun by the PLC in operation screen, pre-welding machine made of steel tubes welding gun is followed the tracks of and is driven motor to move welding gun tracking weld seam motion with Setting signal, operation screen Digital Detecting simultaneously and monitoring welding gun welding position；nullWelded still pipe is suppressed pressurize simultaneously，The proportional pressure valve that the oil that oil pump is got flows through on pre-welding machine made of steel tubes master cylinder and welding pressure roller oil cylinder oil inlet pipeline carries out Stress control，Oil stream controls pre-welding machine made of steel tubes master cylinder and the stroke of welding pressure roller oil cylinder through ratio solenoid directional control valve again，By the displacement during descending of the grating scale inspection pre-welding machine made of steel tubes master cylinder on pre-welding machine made of steel tubes master cylinder，By PLC, the shift position data signal of grating scale is transferred to analog information to operation screen，Displacement during operation screen digitlization display pre-welding machine made of steel tubes master cylinder is descending with welding pressure roller oil cylinder，Opening according to pre-welding machine made of steel tubes master cylinder welding pressure roller oil cylinder adjustment of displacement ratio solenoid directional control valve during descending，Control master cylinder and welding pressure roller oil cylinder and reach the synchronization of oil cylinder，Pressure in pre-welding machine made of steel tubes master cylinder and welding pressure roller oil cylinder is checked by the pressure sensor of pre-welding machine made of steel tubes master cylinder and welding pressure roller oil cylinder oil inlet mouth，In pressure sensor is to pre-welding machine made of steel tubes master cylinder and welding pressure roller joint close compressing cylinder, detected pressure value reaches the force value that operation screen is arranged，Pre-welding machine made of steel tubes master cylinder and welding pressure roller oil cylinder are automatically stopped，Infrared inspection sensor controls welding gun and carries out automatic welding.
Epicoele safety valve the most in parallel and cavity of resorption safety valve on described master cylinder in-line and welding pressure roller oil cylinder oil inlet pipeline, epicoele safety valve and cavity of resorption safety valve are separately mounted in the hydraulic system that epicoele and cavity of resorption oil circuit control, epicoele safety valve and cavity of resorption safety valve control due in system oil-way card valve and make control welding pressure roller oil cylinder working-pressure can not exceed range.
Pre-welding machine made of steel tubes all-the-way tracking system of the present invention is that steel pipe pipe first carries out joint close, carries out gas shielded arc welding successively subsequently, and the operation button shielded by operation carries out pressing operation.In compacting pressure maintaining period, oil stream carries out Stress control through proportional pressure valve, oil stream controls the stroke of oil cylinder again through ratio solenoid directional control valve, oil cylinder descending during system data signal changed into the incoming PLC of analog signal control grating scale check oil cylinder descending during displacement, the opening being adjusted proportioning valve controls different oil cylinder and reaches the synchronization of oil cylinder.When pressure roller is pressed into steel pipe system carry out building pressure pressure by sensor to oil cylinder in pressure check, if reaching to be automatically stopped during the pressure needed.On soldering tip, infrared ray sensor checks that weld seam carries out automatic welding, the pressure of pressure roller checks, by pressure sensor, the welding pressure that each in welding process is put, and the infrared ray sensor being the most automatically adjusted suppressing on the pressure soldering tip simultaneously of steel pipe checks that the change of weld seam is adjusted at any time.Make weld seam not have to be partially welded, pore, crackle, slag inclusion, burn and the weld defect of the flaw such as back side overlap.
Controlling passing ratio overflow valve at hydraulic system pressure to be controlled, oil-feed controls to be connected with ratio solenoid directional control valve, pressure sensor by pipeline, and its oil revolving end is connected with fuel tank.The control port of ratio solenoid directional control valve rod chamber with each pre-welding machine made of steel tubes master cylinder respectively is connected with rodless cavity, one group oil cylinder one group ratio solenoid directional control valve and pressure sensor, moment carries out each oil cylinder stroke, the inspection of pressure and other parameters, when when the steel pipe of different size, the pressure of needs is different with oil cylinder stroke, the each parameter set is the most different, steel pipe according to different size is adjusted parameter and welding carries out welding process when each oil cylinder and pressure carry out the pressure and the stroke that reach to need, if the Stroke Control difference of the pressure that each steel pipe needs due to the difference of deformation when welding and oil cylinder carries out automation on pressure and stroke and adjusts, operation screen shows each different pressures put and the travel parameters during welding detection.When beyond setup parameter, it is automatically adjusted the parameter reaching to set, reaches qualified product.Also the steel pipe for various different sizes provides different reference datas, for later quality and use as parameter foundation.
The above-mentioned pre-welding machine made of steel tubes whole-process automatic tracking adjustment system that type of the present invention provides, owing to applying proportional pressure control valve and ratio solenoid directional control valve, pressure sensor, electrical control, the system that solder technology combines, the blind area pressure of proportional pressure control valve can be acted on the initial pressure off-load reduction of master cylinder, the initial pressure making master cylinder is not enough to steel plate and machinery position thereof are caused damage, thus solve super thick degree in prior art, ultra-thin, extra small, super large-scale difficulty controls the steel pipe of welding quality, solve occur be bent and be forced out vestige or misalignment occurs when steel-pipe welding moves and the problem such as cannot weld, dramatically saves on cost human resources, and decrease the percent defective of steel plate, achieve automation greatly, improve production efficiency." pre-welding machine made of steel tubes all-the-way tracking adjusts system ", it is the control that have employed automation, be characterized in control, change with easy to maintenance, compact conformation, be active in one's movements, stable and reliable in work, ensure that its quality welded in welding in terms of the steel-pipe welding of the most various different sizes and control percent defective, also make it ensure reduction, the requirement of operator on the premise of quality, be to design more humane and rationalize, automating.
Accompanying drawing explanation
Fig. 1 is principle of the invention figure；
In figure: 1 power unit；2 proportional pressure valves；The master cylinder of 3 pre-welding machine made of steel tubes；4 pressure sensors；5 epicoele safety valves；6 ratio solenoid directional control valves；7 cavity of resorption safety valves.
Detailed description of the invention
Below in conjunction with the accompanying drawings type of the present invention is further elaborated:
As it is shown in figure 1, a kind of pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system, including the infrared inspection sensor being connected with pre-welding machine made of steel tubes head, infrared inspection sensor is connected with the image pick-up card controlling machine.The model of infrared inspection sensor is VDM18-300/20/88/122/151.Infrared inspection sensor is connected with operation screen, and operation screen mainly realizes human-computer exchange information, is transferred in operation screen by PLC, and operation screen joint steel pipe Prewelding machine welding gun is followed the tracks of and driven motor；Also include welded still pipe is suppressed pressure-retaining system, wherein include being made up of power unit 1, proportional pressure control valve 2, the master cylinder 3 of pre-welding machine made of steel tubes, pressure sensor 4, epicoele safety valve 5, ratio solenoid directional control valve 6, cavity of resorption safety valve 7 to welded still pipe compacting pressure-retaining system；Set scale pressure valve 2 on oil cylinder 3 in-line of pre-welding machine made of steel tubes, proportional pressure valve 2 connects ratio solenoid directional control valve 6, ratio solenoid directional control valve 6 attended operation screen, ratio solenoid directional control valve 6 is connected with pressure sensor 4, ratio solenoid directional control valve 6 connects proportional pressure valve 2, proportional pressure valve 2 attended operation screen, pressure sensor 4 is arranged on pre-welding machine made of steel tubes master cylinder and welding pressure roller oil cylinder oil inlet mouth.Pre-welding machine made of steel tubes master cylinder and welding pressure roller oil cylinder oil inlet pipeline parallel connection epicoele safety valve 5 and cavity of resorption safety valve 7 respectively.
The present invention is in the pressure difference needed according to the steel pipe of different size when shrinking and extrude joint close of pressure roller pressure pipe, the pressure of system sets up pressure by power unit 1, passing ratio pressure valve 2 carries out the Stress control needed again, when reaching to need pressure, fluid passing ratio solenoid directional control valve 6 enters pre-welding machine made of steel tubes master cylinder 3 and carries out descending and pressurize, when carrying out pressurize when pressure reaches to need pressure, pressure sensor 4 carries out pressurize to control electric system signal, it is ensured that pipe joint close is the circular joint close of a wish.Moving up and down of oil cylinder, thus ensure that steel-pipe welding groove reaches welding requirements.Pressure roller realizes the extruding joint close to pipe.In order to ensure that stable often group pressure roller proportional pressure valve 2 adjustment carried out in various degree in pressing process of pipe joint close makes oil cylinder synchronize, recycling hydraulic coupling and unblank when steel pipe changes specification tune type, it radially relies on hydraulic coupling locking, it is ensured that joint close quality.The epicoele hydraulic fluid port of pre-welding machine made of steel tubes master cylinder 3 is provided with oil pressure pressure sensor, and pressure sensor has been previously set pressure tracking value；Pressurize terminates rear pre-welding machine made of steel tubes master cylinder 3 and carries out release, and the pressure of pre-welding machine made of steel tubes master cylinder 3 epicoele carries out off-load through epicoele ratio solenoid directional control valve 6.In order to avoid pre-welding machine made of steel tubes master cylinder 3 at the end of pressurization in stress-relief process owing to pressure unloads the cleanest, high pressure is built up at cylinder upper cavity oil during work, therefore the opening carrying out valve when ratio solenoid directional control valve 6 is in pressure release carries out little opening, the opening of ratio solenoid directional control valve 6 makes root make complete rear pre-welding machine made of steel tubes master cylinder 3 return of pressure oil liquid off-load to top dead-centre in the size of the voltage of operation display control ratio solenoid directional control valve 6 to the opening controlling ratio solenoid directional control valve 6.In whole welding process, oil pump control pressure passing ratio pressure valve 2 leads to the pressure sensor pressure looked into of inspection 4 to control the size of its pressure fuel pump, then the pressure sensor of passing ratio solenoid directional control valve 6 controls pressure roller pressure size in steel tube surface in the course of work of its pressure roller.After steel pipe is compressed by pressure roller, operation screen starts welding gun start button, and in welding process, the welding process of welding gun checks welding process and welding quality constantly by image pick-up card, and the parameter area on operation screen adjusts welding machine.At the end of welding, operation screen controls platen pressure to operational order to it so that it is controls ratio solenoid directional control valve 6 by pressure sensor 4 and makes its pressure release, while pressure roller return.Operation screen operates pre-welding machine made of steel tubes return button and makes its return.
It is controlled penstock arises that serious misalignment without passing ratio pressure valve 2, ratio solenoid directional control valve 6, pressure sensor 4, occur there will be during steel pipe misalignment directly resulting in the degradation of steel pipe or scrapping.So, the change that just can control pressure during by pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system prewelding sternly controls unfitness of butt joint, and pressure roller adjusts (the circumferential angle of pressure roller is the most right, or with pipe core-wire as axis, left and right pressure roller is asymmetric) not in place.Welding process there will be back side overlap, if removing, time-consumingly, affecting usually carrying out of production process;Involve and do not remove, weldering welding fabrication and the tracking of interior welding line in impact.Burn, outside weld quality in impact, need to fill up.
Producing back side overlap and the cause burnt, it is the tightest that the pressure that is in course of adjustment adjusts the joint close that goes wrong, it is also possible to is that hydraulic system pressure is too low;The choice of prewelding workmanship parameter is improper.Must welding current and arc voltage to be equipped with suitable speed of welding, heat input excessive or weldering speed too low, be all easily generated back side overlap and burn pore.
Claims (6)
1. a pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system, it is characterized in that: include the infrared inspection sensor being connected with pre-welding machine made of steel tubes head, described infrared inspection sensor is connected with operation screen, described operation screen mainly realizes human-computer exchange information, described operation screen is connected with PLC, and described operation screen joint steel pipe Prewelding machine welding gun is followed the tracks of and driven motor；Also include welded still pipe is suppressed pressure-retaining system, described to welded still pipe compacting pressure-retaining system include by power unit, proportional pressure valve, pressure sensor, ratio solenoid directional control valve, described proportional pressure valve is arranged on master cylinder and the welding pressure roller oil cylinder oil inlet pipeline of pre-welding machine made of steel tubes, described proportional pressure valve attended operation screen, described proportional pressure valve connects ratio solenoid directional control valve, described ratio solenoid directional control valve attended operation screen, described ratio solenoid directional control valve is connected with pressure sensor, described pressure sensor is arranged on master cylinder and the oil-in of welding pressure roller oil cylinder of pre-welding machine made of steel tubes, described pressure sensor is connected with operation screen.
Pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system the most according to claim 1, it is characterised in that: the model of described infrared inspection sensor is VDM18-300/20/88/122/151.
Pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system the most according to claim 1, it is characterized in that: connect epicoele safety valve and cavity of resorption safety valve, described epicoele safety valve and cavity of resorption safety valve on the in-line of the master cylinder of described pre-welding machine made of steel tubes and welding pressure roller oil cylinder in parallel.
Pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system the most according to claim 1, it is characterised in that: described infrared inspection sensor is connected with the image pick-up card controlling machine, and the image pick-up card of described control machine connects PLC and operation screen.
5. the control method of the pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system described in any one of the claims, it is characterized in that: Coiling Welded Pipe weld seam situation treated by described infrared inspection sensor when pre-welding machine made of steel tubes welds and welding quality detects, the parameter of infrared inspection sensor detection is transferred to PLC, by PLC, the detection signal of infrared inspection sensor is converted into pulse signal transmission to operation screen again, pre-welding machine made of steel tubes welding gun is followed the tracks of and is driven motor Setting signal by operation screen, pre-welding machine made of steel tubes welding gun is followed the tracks of and is driven motor to move welding gun to follow the tracks of weld seam motion with Setting signal, operation screen Digital Detecting simultaneously and monitoring welding gun welding position；nullWelded still pipe is suppressed pressurize by welded still pipe compacting pressure-retaining system simultaneously，The oil that oil pump is got flows through the master cylinder of pre-welding machine made of steel tubes and carries out Stress control with the proportional pressure valve on welding pressure roller oil cylinder oil inlet pipeline，Oil stream controls the stroke of the master cylinder of pre-welding machine made of steel tubes again through ratio solenoid directional control valve，During the master cylinder of pre-welding machine made of steel tubes and the descending of welding pressure roller oil cylinder，By the displacement during descending of the master cylinder of the grating scale inspection pre-welding machine made of steel tubes on the master cylinder of pre-welding machine made of steel tubes，By PLC, the shift position data signal of grating scale is transferred to analog information to operation screen，Operation screen digitlization display pre-welding machine made of steel tubes master cylinder and welding pressure roller oil cylinder descending during displacement，The opening of the adjustment of displacement ratio solenoid directional control valve during the master cylinder according to pre-welding machine made of steel tubes is descending with welding pressure roller oil cylinder，Control the master cylinder of different pre-welding machine made of steel tubes and weld pressure roller oil cylinder and reach master cylinder and the synchronization of welding pressure roller oil cylinder of different pre-welding machine made of steel tubes，Pressure in the master cylinder of pre-welding machine made of steel tubes is checked by the pressure sensor of the oil-in of the master cylinder of pre-welding machine made of steel tubes，In pressure sensor is to the master cylinder of pre-welding machine made of steel tubes and welding pressure roller oil cylinder, detected pressure value reaches the force value that operation screen is arranged，The master cylinder of pre-welding machine made of steel tubes and welding pressure roller close oil cylinder and are automatically stopped，Infrared inspection sensor controls welding gun and carries out automatic welding.
The control method of pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system the most according to claim 5, it is characterized in that: on the in-line of the master cylinder of described pre-welding machine made of steel tubes and welding pressure roller oil cylinder, connect epicoele safety valve and cavity of resorption safety valve, described epicoele safety valve and cavity of resorption safety valve are in parallel, epicoele safety valve and cavity of resorption safety valve are separately mounted in the hydraulic system of epicoele oil circuit and the control of cavity of resorption oil circuit, and epicoele safety valve and cavity of resorption safety valve control the oil cylinder working-pressure of pressure roller respectively without departing from range.
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| CN201410661869.0A CN104493345B (en) | 2014-11-19 | 2014-11-19 | Pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system and control method thereof |
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| CN201410661869.0A CN104493345B (en) | 2014-11-19 | 2014-11-19 | Pre-welding machine made of steel tubes all-the-way tracking automatic adjustment system and control method thereof |
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| CN2652577Y (en) * | 2003-04-25 | 2004-11-03 | 北京石油化工学院 | Full position walking photoelectric real time tracking pipeline welder robot |
| CN201344171Y (en) * | 2008-12-14 | 2009-11-11 | 天水锻压机床有限公司 | Servo hydraulic system for tracking steel tube |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546268A (en) * | 2003-12-17 | 2004-11-17 | 南昌大学 | Intelligent control system for weld seam tracking and fusion penetration in spiral pipes |
| JP2013154397A (en) * | 2012-01-05 | 2013-08-15 | Daihen Corp | Welding equipment |
| JP2014184457A (en) * | 2013-03-22 | 2014-10-02 | Daihen Corp | Output control method of welding electric power source |
| CN103615436B (en) * | 2013-12-06 | 2016-07-06 | 天水锻压机床(集团)有限公司 | Steel tube straightening machine numerical control electrohydraulic ratio system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2652577Y (en) * | 2003-04-25 | 2004-11-03 | 北京石油化工学院 | Full position walking photoelectric real time tracking pipeline welder robot |
| CN201344171Y (en) * | 2008-12-14 | 2009-11-11 | 天水锻压机床有限公司 | Servo hydraulic system for tracking steel tube |
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