CN104985283A - Method for welding thick steel plates through single-wire electrogas welding machine - Google Patents
Method for welding thick steel plates through single-wire electrogas welding machine Download PDFInfo
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- CN104985283A CN104985283A CN201510384392.0A CN201510384392A CN104985283A CN 104985283 A CN104985283 A CN 104985283A CN 201510384392 A CN201510384392 A CN 201510384392A CN 104985283 A CN104985283 A CN 104985283A
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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
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
-
- 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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
- B23K31/125—Weld quality monitoring
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/022—Welding by making use of electrode vibrations
-
- 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
- B23K9/095—Monitoring or automatic control of welding parameters
-
- 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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/164—Arc welding or cutting making use of shielding gas making use of a moving fluid
-
- 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
-
- 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
- B23K9/32—Accessories
-
- 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
- B23K2101/18—Sheet panels
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Quality & Reliability (AREA)
- Arc Welding In General (AREA)
- Arc Welding Control (AREA)
Abstract
The invention discloses a method for welding thick steel plates through a single-wire electrogas welding machine. The method is characterized by including the following steps of pre-welding preparation, welding and post-welding heat treatment. The post-welding heat treatment method includes the steps of placing workpieces in a furnace with the furnace temperature not higher than 300 DEG C, heating the workpieces to the temperature of 625+/-20 DEG C at the heating rate of 65 DEG C/h, keeping the temperature of 625+/-20 DEG C for six hours, then cooling the workpieces to below 300 DEG C at the rate of 65 DEG C/h, discharging the workpieces out of the furnace and cooling the workpieces in still air. At the macroscopic level, arc breaking does not occur in the welding process, smooth and attractive surfaces of weld joints are formed, and follow-up fusion transition of weld metal of the weld joints and wood has not defect except for incomplete fusion at arc striking ends. Cutting and sampling analysis on weld joints of test pieces for welding shows that mechanical properties of the weld joints are higher than those of parent metal, the hardness of the part, in the heat affected zone, of the parent metal is lower than that of the weld joints and slightly higher than that of the part, outside the heat affected zone, of the parent metal; the front weld joints and the back weld joints have the same forming width.
Description
Technical field
The invention belongs to welding technology field, particularly relate to a kind of method adopting monofilament electrogas welding machine to weld steel plate.
Background technology
Along with the fast development of China's economic construction, thick steel plate steel structure welding appears at the industries such as metallurgy, shipbuilding, petrochemical industry, water conservancy in a large number.For the steel plate vertical welding of thickness at 60-100 mm (even thicker), also there is no a kind of high-quality and efficient welding method and relevant device, SMAW is difficult to solve this difficult problem, though electroslag welding can solve this difficult problem, such as application number is 201010180014.8, what denomination of invention was that the patent of the welding method of slab banjo fixing butt jointing says is exactly adopt the method for electroslag welding with tube electrode to be that the workpiece of 240-286mm is welded as a whole by two pieces thickness, the method step comprised: the first step, welds prepares: add multiple alloy elements and obtain powder in pipe formulation for coating material, add adhesive after powder mixes, make pipe coating, pipe coating is coated on the outer wall of pipe pole, four pipes are extremely fixedly assemblied on clamping device, regulate the fit-up gap of two workpiece, second step, welding: carry out electroslag welding, sends in the molten bath that four pipe poles are formed by welding wire, energising welding, welding direction is for be welded to upper groove from lower groove, 3rd step, post weld heat treatment.
And application number is 201420545534.8, denomination of invention is a kind of patent of electroslag welder, technical scheme disclosed in it comprises electroslag welding power supply, the power-supply controller of electric be connected with described electroslag welding power supply, wire feeder, welding gun, mechanical driver unit, cooling device, the power interface be connected with described electroslag welding power supply, wire feeder comprises welding wire funnel, wire feed pipeline, wire-feed motor, school silk device, described welding wire funnel is connected with welding gun by wire feed pipeline, described wire-feed motor is connected on wire feed pipeline, described cooling device comprises water tank, water pipeline, described water tank is connected with welding gun by water pipeline, described mechanical driver unit comprises the pendulous device and lifting device that are connected with welding gun, described pendulous device is connected with oscillating motor, the other end is connected with welding gun by drive link, described pendulous device bottom is provided with bearing, described lifting device is connected with lifting motor.
But because the heat affected area of electroslag welding is large, weld seam cools naturally, causes weld seam and perienchyma's coarse grains thereof, causes weld properties lower than the mechanical property of mother metal, and this fatal shortcoming makes electroslag welding face the state be eliminated, and now seldom applies.
Summary of the invention
The object of the invention is to provide a kind of steel plate vertical welding method for thick steel plate steel structure vertical welding, the process employs monofilament electrogas welding machine and weld, solve prior art medium plate and found the problem of stitching high-quality and efficient automatic welding difficulty.
The technical solution used in the present invention is:
Adopt the method for monofilament electrogas welding machine welding steel plate, comprise the following steps:
Step one, welds prepares:
A, offer X-type groove, the gap of lower groove is 6mm, and the gap of upper groove is 18mm;
B, distance groove 500mm place be parallel to groove length direction, be adsorbed on steel plate by the welding tractor of monofilament electrogas welding machine; Described monofilament electrogas welding machine comprises a source of welding current, wire-feed motor, monofilament water cooled welding torch, welding tractor, a set of water-cooling system, a set of carbon dioxide air supply system and the welding operation box be all electrically connected with above-mentioned parts, the source of welding current connects wire-feed motor, water-cooling system and carbon dioxide air supply system are connected to monofilament water cooled welding torch, and monofilament water cooled welding torch is arranged on welding tractor; Described welding tractor comprises car body, track, magnet, welding gun adjusting mechanism and welding gun oscillation mechanism, track two ends are arranged for track being adsorbed in the magnet on welded steel plate, walking gear on car body engages with the tooth bar on track and realizes car body walking in orbit, welding gun adjusting mechanism is arranged on car body, the output of welding gun adjusting mechanism installs welding gun oscillation mechanism, the output of welding gun oscillation mechanism installs monofilament water cooled welding torch, and welding gun adjusting mechanism is used for carrying out adjustment to the position of monofilament water cooled welding torch and angle and locates; For controlling and regulating the welding operation box of welding process parameters to be fixed in the track be positioned at above car body; A set of electric-control system for operating whole welding process has been installed in welding operation box;
C, arc end flame is heated to 200 degrees Celsius;
D, setting torch swinging parameter, welding current, weldingvoltage;
E, unlatching carbon dioxide air supply system, water-cooling system, and set the circulating water flow of carbon dioxide gas supply flow and water-cooling system;
Step 2, welding: the welding parameter in welding process is: wire feed rate is 15m/min; Arc voltage is 38-40V; Speed of welding is 4cm/min; Welding current is 480-550A; The welding extraction stage lowers weldingvoltage and wire feed rate gradually;
Step 3, post weld heat treatment: postwelding entirety enters the process of stove Stress relieving annealing; The method of described post weld heat treatment is: workpiece is placed in furnace temperature not higher than the stove of 300 DEG C, keep 6 hours to temperature 625 ± 20 DEG C with the heating rate of the rate of heat addition 65 DEG C/h, be then cooled to less than 300 DEG C to come out of the stove with the speed of 65 DEG C/h and cool in still air.
Setting carbon dioxide gas supply flow in described step one when welding front and back is all 25L/min.
Setting circulating water flow in described step one, is all 130L/min when welding front and back.
Welding the welding wire trade mark selected in described step 2 is 43G, φ 1.6mm.
Also comprise in described step one: triangle water-cooled copper gear row is loaded in underside groove.
After the present invention adopts technique scheme, there is following technique effect:
From macroscopically, do not occur current interruption in welding process, appearance of weld is smoothly attractive in appearance, and except except arc end lack of fusion, the weldering meat of subsequent weld and timber fuse the equal zero defect of transition.
The cutting sampling analysis of test piece for welding weld seam is shown: weld properties is than the height of mother metal, and the hardness ratio weld seam of heat affected area mother metal is low, slightly higher than the mother metal hardness beyond heat affected area; Positive and negative appearance of weld width is consistent.
Detailed description of the invention
For making the object of the application and technical scheme clearly, be clearly and completely described below in conjunction with the technical scheme of the embodiment of the present application to the application.Obviously, described embodiment is a part of embodiment of the application, instead of whole embodiments.Based on the embodiment of described the application, the every other embodiment that those of ordinary skill in the art obtain under without the need to the prerequisite of creative work, all belongs to the scope of the application's protection.
A kind of monofilament electrogas welding machine, comprise a source of welding current, wire-feed motor, monofilament water cooled welding torch, welding tractor, a set of water-cooling system, a set of carbon dioxide air supply system and the welding operation box be all electrically connected with above-mentioned parts, the source of welding current connects wire-feed motor, water-cooling system and carbon dioxide air supply system are connected to monofilament water cooled welding torch, and monofilament water cooled welding torch is arranged on welding tractor; Described welding tractor comprises car body, track, magnet, welding gun adjusting mechanism and welding gun oscillation mechanism, track two ends are arranged for track being adsorbed in the magnet on welded steel plate, walking gear on car body engages with the tooth bar on track and realizes car body walking in orbit, welding gun adjusting mechanism is arranged on car body, the output of welding gun adjusting mechanism installs welding gun oscillation mechanism, the output of welding gun oscillation mechanism installs monofilament water cooled welding torch, and welding gun adjusting mechanism is used for carrying out adjustment to the position of monofilament water cooled welding torch and angle and locates; For controlling and regulating the welding operation box of welding process parameters to be fixed in the track be positioned at above car body; A set of electric-control system for operating whole welding process has been installed in welding operation box.
Monofilament electrogas welding machine is adopted to carry out the step of welding:
Step one, welds prepares
(1) offer X-type groove, the gap of lower groove is 6mm, and the gap of upper groove is 18mm; At distance groove 500 mm place be parallel to groove length direction, be adsorbed on by track on steel plate, welding tractor is installed in orbit.
(2) electric wire is accessed, make the source of welding current, welding tractor, water cooling system, carbon dioxide air supply system and electric-control system online and to electricity, then start the source of welding current, make monofilament electrogas welding machine be in quasi-operating status.
(3) arc end flame is heated to 200 degrees centigrade.
(4) triangle water-cooled copper gear row is loaded in underside groove.
(5) welding tractor is walked to striking position, water-cooled slide block installs in place, places and is used for the broken welding wires of striking, adjust welding gun adjusting mechanism toward groove striking point, welding gun is goed deep in groove and is in close welding position.
(6) set torch swinging parameter, the principle swinging the idle hours of two end points is: short inside groove, outer face length (because of narrow outer face width inside groove).Do swing test, make welding gun be in correct position and swing state.
(7) welding current, weldingvoltage parameter is set;
(8) carbon dioxide steam supply valve, circulating water cooling system is opened;
Preferably, carbon dioxide gas supply flow is all 25L/min when welding front and back.Circulating water flow is all 130L/min when welding front and back.
Further, welding the welding wire trade mark selected is 43G, φ 1.6mm.
Step 2, welding: the welding parameter in welding process is: wire feed rate is 15m/min; Arc voltage is 38-40V; Speed of welding is 4cm/min; Welding current is 480-550A; The welding extraction stage lowers weldingvoltage and wire feed rate gradually;
Step 3, post weld heat treatment: postwelding entirety enters the process of stove Stress relieving annealing; The method of described post weld heat treatment is: workpiece is placed in furnace temperature not higher than the stove of 300 DEG C, keep 6 hours to temperature 625 ± 20 DEG C with the heating rate of the rate of heat addition 65 DEG C/h, be then cooled to less than 300 DEG C to come out of the stove with the speed of 65 DEG C/h and cool in still air.
After weld seam is soldered, press " stopping " button on welding operation box, and circulating water cooling system also to continue work a period of time, cool further with the device (as water-cooling copper bar, water-cooled slide block, water cooled welding torch etc.) that is heated to make weld seam.
Postwelding is analyzed:
Butt welded seam carries out macroscopic observation, obtains: do not occur current interruption in welding process, and appearance of weld is smoothly attractive in appearance, and except except arc end lack of fusion, the weldering meat of subsequent weld and timber fuse the equal zero defect of transition.
Hardness test is carried out in butt welded seam sampling, obtains data:
| Title | Impression diameter/mm | Hardness (HB) |
| Weld seam | 4.30 | 192 |
| Nearly spot welds | 4.58 | 155 |
| Spot welds far away | 4.85 | 145 |
Data show, weld properties is higher than mother metal, and the hardness ratio weld seam of heat affected area mother metal is low, slightly higher than the mother metal hardness beyond heat affected area.
Butt welded seam positive and negative is measured, and the result obtained is that positive and negative appearance of weld width is consistent.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, and all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the application.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
The implication of the "and/or" described in the application refers to respective individualism or both simultaneous situations include interior.
With the above-mentioned desirable embodiment according to the application for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this application technological thought, can carry out various change and amendment completely.The technical scope of this application is not limited to the content on description, must determine its technical scope according to right.
Claims (5)
1. adopt the method for monofilament electrogas welding machine welding steel plate, it is characterized in that, comprise the following steps:
Step one, welds prepares:
A, offer X-type groove, the gap of lower groove is 6mm, and the gap of upper groove is 18mm;
B, distance groove 500mm place be parallel to groove length direction, be adsorbed on steel plate by the welding tractor of monofilament electrogas welding machine; Described monofilament electrogas welding machine comprises a source of welding current, wire-feed motor, monofilament water cooled welding torch, welding tractor, a set of water-cooling system, a set of carbon dioxide air supply system and the welding operation box be all electrically connected with above-mentioned parts, the source of welding current connects wire-feed motor, water-cooling system and carbon dioxide air supply system are connected to monofilament water cooled welding torch, and monofilament water cooled welding torch is arranged on welding tractor; Described welding tractor comprises car body, track, magnet, welding gun adjusting mechanism and welding gun oscillation mechanism, track two ends are arranged for track being adsorbed in the magnet on welded steel plate, walking gear on car body engages with the tooth bar on track and realizes car body walking in orbit, welding gun adjusting mechanism is arranged on car body, the output of welding gun adjusting mechanism installs welding gun oscillation mechanism, the output of welding gun oscillation mechanism installs monofilament water cooled welding torch, and welding gun adjusting mechanism is used for carrying out adjustment to the position of monofilament water cooled welding torch and angle and locates; For controlling and regulating the welding operation box of welding process parameters to be fixed in the track be positioned at above car body; A set of electric-control system for operating whole welding process has been installed in welding operation box;
C, arc end flame is heated to 200 degrees Celsius;
D, setting torch swinging parameter, welding current, weldingvoltage;
E, unlatching carbon dioxide air supply system, water-cooling system, and set the circulating water flow of carbon dioxide gas supply flow and water-cooling system;
Step 2, welding: the welding parameter in welding process is: wire feed rate is 15m/min; Arc voltage is 38-40V; Speed of welding is 4cm/min; Welding current is 480-550A; The welding extraction stage lowers weldingvoltage and wire feed rate gradually;
Step 3, post weld heat treatment: postwelding entirety enters the process of stove Stress relieving annealing; The method of described post weld heat treatment is: workpiece is placed in furnace temperature not higher than the stove of 300 DEG C, keep 6 hours to temperature 625 ± 20 DEG C with the heating rate of the rate of heat addition 65 DEG C/h, be then cooled to less than 300 DEG C to come out of the stove with the speed of 65 DEG C/h and cool in still air.
2. the method for employing monofilament electrogas welding machine welding steel plate according to claim 1, it is characterized in that, setting carbon dioxide gas supply flow in described step one when welding front and back is all 25L/min.
3. the method for employing monofilament electrogas welding machine welding steel plate according to claim 1, it is characterized in that, set circulating water flow in described step one, is all 130L/min when welding front and back.
4. the method for employing monofilament electrogas welding machine welding steel plate according to claim 1, it is characterized in that, welding the welding wire trade mark selected in described step 2 is 43G, φ 1.6mm.
5. the method adopting monofilament electrogas welding machine welding steel plate as claimed in claim 1, is characterized in that, also comprise in described step one: triangle water-cooled copper gear row loaded in underside groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510384392.0A CN104985283A (en) | 2015-06-30 | 2015-06-30 | Method for welding thick steel plates through single-wire electrogas welding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510384392.0A CN104985283A (en) | 2015-06-30 | 2015-06-30 | Method for welding thick steel plates through single-wire electrogas welding machine |
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| CN104985283A true CN104985283A (en) | 2015-10-21 |
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| CN201510384392.0A Withdrawn CN104985283A (en) | 2015-06-30 | 2015-06-30 | Method for welding thick steel plates through single-wire electrogas welding machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105252111A (en) * | 2015-11-11 | 2016-01-20 | 宁夏天地奔牛实业集团有限公司 | Manufacturing method for mining BTW strong-toughness middle slot |
| CN106799534A (en) * | 2015-11-25 | 2017-06-06 | 上海船厂船舶有限公司 | Slope board automatic soldering method |
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2015
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| CN105252111A (en) * | 2015-11-11 | 2016-01-20 | 宁夏天地奔牛实业集团有限公司 | Manufacturing method for mining BTW strong-toughness middle slot |
| CN106799534A (en) * | 2015-11-25 | 2017-06-06 | 上海船厂船舶有限公司 | Slope board automatic soldering method |
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Application publication date: 20151021 |