CN102357709B - Automatic welding method for circumferential welding seam of round pipe - Google Patents
Automatic welding method for circumferential welding seam of round pipe Download PDFInfo
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- CN102357709B CN102357709B CN201110316004.7A CN201110316004A CN102357709B CN 102357709 B CN102357709 B CN 102357709B CN 201110316004 A CN201110316004 A CN 201110316004A CN 102357709 B CN102357709 B CN 102357709B
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Abstract
The invention belongs to the field of pipe welding technology, and particularly relates to a multilayer and multichannel automatic welding method for a circumferential welding seam of a round pipe. According to the method, the round pipe rotates relative to a welding gun in the welding process, and the welding position and welding angle of the welding gun in three-dimensional direction can be automatically adjusted so as to realize automatic welding of the circumferential welding seam. By adopting the welding method provided by the invention, the round pipe rotates relative to the welding gun in the welding process, and the welding position and welding angle of the welding gun in three-dimensional direction can be automatically adjusted, thus the welding position and the welding angle can be flexibly and accurately adjusted so as to automatically perform multi-layer multipass welding to form a circumferential welding with relatively good mechanical performance.
Description
Technical field
The invention belongs to pipe fitting welding technology field, particularly, relate to a kind of multilayer multiple tracks automatic soldering method of circumferential weld of pipe part.
Background technology
Truss structure is common in the factory building of large span, exhibition center, the public building such as gymnasium and bridge.Wherein, some truss arm to be cut with scissors at two ends and ear by the chord member of circular tube shaped or bearing Combination Welding and being formed, and the weld seam that described truss arm is formed after welding has been completed is circumferential weld.Due to the mechanical characteristic of truss structure, the circumferential weld that truss arm is formed after welding requires higher in mechanical properties such as bonding strengths, thus circumferential weld requires enough solid and has certain sectional dimension, and consider wall thickness and the roundness of welded pipe part, the circumferential weld formed also should have larger width and thickness.Thus, when welding, the wall thickness direction of welded pipe part needing a point multilayer welding, and on some layer of pipe part axis direction, needs to carry out multiple tracks welding, thus forming the circumferential weld of multilayer multiple tracks.
According to manual all-position welding to form the circumferential weld of multilayer multiple tracks, then require that welder has the technical ability of all-position welding, very high to the requirement of welder, weld interval is long, and labour intensity is large.Can be used in the automatic welder(welding machine) of circumferential weld welding, have plenty of and adopt circular pipe workpiece motionless and welding manner that welding head rotates around circular pipe workpiece, this just needs the space of support track and the welding head rotation that can rotate for welding head, is thus often uprightly arranged by circular pipe workpiece thus conveniently welds.Above-mentioned welding manner operation easier for length and diameter dimension and all very large pipe part (such as chord member) of weight is larger.And in common automatic welder(welding machine), regulate the automaticity of the various governor motions of welding position to have deficiency, be much manual adjustments, this is obviously difficult to the welding requirements of the circumferential weld meeting above-mentioned multilayer multiple tracks more.In addition, when especially carrying out the welding of some circumferential welds on same circular pipe fitting, more relate to the synchronism problem of each road weld seam welding simultaneously.
Summary of the invention
The object of the invention is according to above-mentioned the deficiencies in the prior art part, a kind of multilayer multiple tracks automatic soldering method of circumferential weld of pipe part is provided, automatically to complete the welding of circumferential weld simply and effectively.
According to an aspect of the present invention, propose a kind of multilayer multiple tracks automatic soldering method of circumferential weld of pipe part, in welding process, described pipe part rotates relative to welding gun, and the welding position of described welding gun on three-dimensional and soldering angle can regulate, automatically to realize the automatic welding of circumferential weld.
Preferably, in welding process, by automatically regulating described welding gun relative to the axial location of described pipe part, realize the shunting welding of circumferential weld.
Preferably, described shunting welding process comprises:
1) welding gun is regulated relative to the initial weld position of described pipe part and soldering angle;
2) the welding gun starting the arc;
3) described pipe part is driven to rotate, to complete the welding of first weld seam;
4) described welding gun automatically moves axially to down the welding position of one weld seam, regulates soldering angle, and completes down the welding of one weld seam;
5) step 4) is repeated, until complete the per pass weld seam welding of described circumferential weld.
Preferably, in welding process, by automatically regulating described welding gun relative to the radial position of described pipe part, realize the layering welding of circumferential weld.
Preferably, described layering welding process comprises:
A) welding gun is regulated relative to the initial weld position of described pipe part and soldering angle;
B) the welding gun starting the arc drive described pipe part to rotate;
C) on ground floor weld seam, the welding of one or multi-channel weld seam is carried out by the welding of described shunting, to complete the welding of this layer of weld seam;
D) after completing the welding of ground floor weld seam, described welding gun carries rifle automatically, is radially moved into the welding position of the first weld seam of lower one deck weld seam, regulates soldering angle, and has welded the welding of described lower one deck weld seam by described shunting;
E) step d) is repeated, until complete every layer of weld seam welding of described circumferential weld.
Preferably, in welding process, gun tracking mechanism is used to avoid described pipe part to produce circular runout.
Preferably, in welding process, when described welding gun is when carrying out the welding of described circumferential weld, the position that described gun tracking mechanism followed by described welding gun is moved.
Preferably, in welding process, detect the temperature of the test point on described pipe part outer peripheral face in real time, the axial distance between the mid point of this test point and described circumferential weld is 75-100mm.
Preferably, control opening weldering and stopping weldering of described welding gun according to the temperature of above-mentioned test point, the temperature of test point is remained in the scope of 100 °-200 °.
Preferably, before welding, preheating is carried out to the welding position of described pipe part.
After adopting the automatic soldering method of the circumferential weld of pipe part in the present invention, in welding process, described pipe part rotates relative to welding gun, and the welding position of described welding gun on three-dimensional and soldering angle can regulate automatically, thus also accurately can regulate welding position and soldering angle relatively flexibly, automatically to carry out multi-layer multi-pass welding, thus form the circumferential weld with better mechanical performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the automatic welder(welding machine) according to one embodiment of the present invention.
Description of reference numerals
1 welding gun 2 welding head 3 welding tracking mechanism
4 rolling press-wheel 5 pipe part 6 workpiece rotary motion mechanisms
7 column 8 column slide block 9 motors
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality of use, if " axis ", " radial direction " etc. are normally for pipe part, represents in the coordinate of three-dimensional in FIG, " X " axle indicates the axis of pipe part, and " Y " and " Z " axle all represents the radial direction of pipe part.The position that term " welding position " i.e. welding gun rifle head in literary composition is residing when welding, " soldering angle " i.e. welding gun departs from the angle of inclination of vertical direction (or horizontal direction) on the center of pad, the inclination angle namely when swinging welding between the oscillation center line of welding gun and vertical direction (or horizontal direction).
With reference to Fig. 1, according to the present invention, propose a kind of multilayer multiple tracks automatic soldering method of circumferential weld of pipe part, in welding process, described pipe part 5 rotates relative to welding gun 1, and the welding position of described welding gun 1 on three-dimensional and soldering angle can regulate, automatically to realize the automatic welding of circumferential weld.In the method for the invention, as shown in Figure 1, the mode making pipe part 5 spin transfer welding gun 1 relatively motionless is welded, relative to the welding manner that welding gun 1 rotates around workpiece, the more convenient practicality of welding manner of the present invention, pipe part 5 need not be erect to facilitate welding gun 1 to rotate, and also without the need for the space that the support track rotated for welding head 2 and welding head 2 rotate, and welding efficiency also improves.The more important thing is, because welding gun 1 is relatively motionless, thus pass more readily the welding position and soldering angle that control welding gun 1, the welding procedure of circumferential weld can be optimized.When especially relating to the welding of the circumferential weld of multilayer multiple tracks, while pipe part 5 spinning, by automatically regulating welding position and the soldering angle of welding gun 1, what namely regulate welding gun puies forward rifle height and weld width etc., the welding in layering shunting can be carried out, the circumferential weld of final formation multilayer multiple tracks, below will describe in detail.
In automatic welder(welding machine) as shown in Figure 1, in the welding head 2 of described automatic welder(welding machine), be provided with welding position governor motion and soldering angle governor motion.Described welding position governor motion by the sliding-rail sliding device that arranges respectively on three-dimensional to realize the adjustment of welding position, described soldering angle governor motion regulates the soldering angle of welding gun by the rotation of the rotating shaft for fixing welding gun 1, and can connect described welding position governor motion.The structure of welding position governor motion and soldering angle governor motion is no longer carefully stated at this, and those of ordinary skill in the art realizes above-mentioned welding position governor motion and soldering angle governor motion by various structures or mode.Wherein, for realizing the welding position of described welding gun 1 on three-dimensional and the automatic adjustment of soldering angle, automatic welder(welding machine) is equipped with welding control system (not shown), this welding control system has control program, such as PLC control system, the welding position governor motion in automatic control soldering head 2 and soldering angle governor motion can be distinguished, thus automatically can regulate the welding position of described welding gun 1 on three-dimensional and soldering angle, and complete the welding of circumferential weld on the basis that pipe part 5 rotates.In automatic welder(welding machine) as shown in Figure 1, welding position governor motion and the equal accessible site of soldering angle governor motion are arranged in welding head 2, so structurally compacter, be not easy to produce movement interference, coordination between each welding position governor motion and linkage good, also can make that welding head 2 is such as following with other mechanisms to be more easily connected the gun tracking mechanism 3 addressed and routing motion.In addition, welding position governor motion and all integrated mode be arranged in welding head 2 of soldering angle governor motion, with respect to regulating the position of welding head 2 thus indirectly regulating the mode of welding gun position in a certain direction, more convenient automatic control, and directly the control program of control mode is simple, and precision also can be higher.
When the circumferential weld cross sectional dimensions of pipe part 5 is larger, during wider width, or when the mechanical property requirements of the pipe part 5 welded is higher, then disposable welding is difficult to the circumferential weld required for formation, or the mechanical performance of the circumferential weld formed does not reach requirement, now need the welding carrying out multilayer multiple tracks.Thus, when carrying out shunting welding, in welding process, by automatically regulating described welding gun 1 relative to the axial location (X-direction in Fig. 1) of described pipe part 5, realize the shunting welding of circumferential weld.Namely while pipe part 5 rotates, judge that pipe part 5 is complete by described welding control system to rotate a circle, after completing the welding of one weld seam, described welding control system automatically controls welding gun 1 and axially moves to lower one commissure at pipe part 5, carries out lower one weld seam welding.
Particularly, described shunting welding process can comprise the following steps:
1) welding gun 1 is regulated relative to the initial weld position of described pipe part 5 and soldering angle; In this step, as shown in Figure 1, pipe part 5 to be installed on workpiece rotary motion mechanism 6 and to realize location, motor 9 drives the column slide block 8 on column 7 to drive welding head 2, make regulating frame head 2 close to pipe part 5, control welding head 2 by described welding control system again, make welding gun 1 reach initial weld position and soldering angle;
2) the welding gun starting the arc; After welding gun 1 reaches initial weld position and soldering angle, welding can be prepared;
3) described pipe part 5 is driven to rotate, to complete the welding of first weld seam;
4) described welding gun 1 automatically moves axially to down the welding position of one weld seam, regulates soldering angle, and completes down the welding of one weld seam; Wherein, judged the welding of first weld seam at described welding control system after, can automatically control described welding gun automatically axially (X-direction namely in Fig. 1) move to down the welding position of one weld seam, and complete down the welding of one weld seam;
5) step 4) is repeated, until complete the per pass weld seam welding of described circumferential weld.
The process of above shunting welding, can realize the welding of described shunting by controlling welding gun automatically in the automatic movement of the axis (X-direction in Fig. 1) of pipe part 5.
And when carrying out layering welding, in welding process, by regulating described welding gun 1 relative to the radial position of described pipe part 5, realize the layering welding of circumferential weld.Y in the radial position of pipe part 5 and Fig. 1 or Z-direction, because welding gun 1 is generally located at directly over pipe part axis, thus usually in the Z-axis direction, but welding gun also can carry out radial displacement at Y-axis or Z axis or other any radial direction, to complete layering welding in the blunderbuss direction of welding gun.
Wherein, described layering welding process can comprise:
A) welding gun 1 is regulated relative to the initial weld position of described pipe part 5 and soldering angle;
B) welding gun 1 starting the arc drive described pipe part 5 to rotate;
C) on ground floor weld seam, the welding of one or multi-channel weld seam is carried out by the welding of described shunting, to complete the welding of this layer of weld seam; Wherein, form bevel for welding owing to welding front pipe part 5 weld, thus as the ground floor weld seam of the bottom of required welded seam, general need be welded one weld seam, and weld layer more up, weld seam is wider, and the number of channels of required welding is then more.
D) after completing the welding of ground floor weld seam, described welding gun 1 carries rifle automatically, is radially moved into the welding position of the first weld seam of lower one deck weld seam, regulates soldering angle, and has welded the welding of described lower one deck weld seam by described shunting;
E) step d) is repeated, until complete every layer of weld seam welding of described circumferential weld.
Carrying out in above-mentioned automatic Arc Welding, is all that welding has been moved in the position automatically controlling welding gun by welding control system.Wherein also can suspend described automatic Arc Welding, and adjust soldering angle or the position of welding gun by operating described welding control system, to realize the manual intervention in automatic Arc Welding.
In the present embodiment, to form the Combination Welding of truss arm, described pipe part 5 is size and institute's all larger chord member that takes up space, and chord member is cut with scissors or bearing engages and forms truss arm with ear by welding.As previously mentioned, the wall thickness direction of chord member needs a point multilayer welding.Thus preferably, in the welding process to the described chord member as pipe part, the wall thickness direction of the pipe wall of described pipe part 5 adopts layering to weld, and adopt shunting to weld on the axis direction of the described pipe part 5 of every layer.Thus correspondingly the welding position of described welding gun on the wall thickness direction of the pipe wall of described pipe part is regulated by described welding head, to realize described layering welding; The welding position of described welding gun on the axis direction of described pipe part is regulated, to realize the welding of described shunting by described welding head.
When welding, due to the lack of uniformity of pipe part 5 circumferential surface, the pipe part 5 rotated when welding inevitably exists beats, thus affects welding quality.Therefore, in automatic Arc Welding, gun tracking mechanism 3 can be used to produce circular runout to avoid described pipe part 5.The rolling press-wheel 4 of the gun tracking mechanism 3 be fixedly connected with described welding head 2 is pressed on pipe part 5 surface by the tensile force that strainer applies, and to prevent pipe part 5 from beating, ensures that welding position is accurate.Further, in welding process, when described welding gun 1 is when carrying out the welding of described circumferential weld, the position that described welding gun 1 can follow described gun tracking mechanism 3 is moved.That is, when pipe part 5 surface exists rough and uneven in surface, because rolling press-wheel 4 is fixedly connected with welding head 2, thus welding gun 1 can follow rolling press-wheel 4 make corresponding position adjustment, make welding precise positioning, welding quality is more excellent.
In addition, in welding process, good for ensureing the weldquality welded, meet mechanical property requirements, need the temperature detecting the test point on described pipe part outer peripheral face in real time.Preferably, the axial distance between the mid point of described test point and described circumferential weld is 75-100mm.Further, also can control opening weldering and stopping weldering of described welding gun according to the temperature of above-mentioned test point, make the temperature of test point remain in the scope of 100 °-200 °, the circumferential weld of better mechanical performance can be obtained.Especially, before welding, the welding position of tackling described pipe part carries out preheating, and temperature when making the temperature of this welding position reach welding is good.
In addition, when needing the welding carrying out some circumferential welds on same pipe part 5 simultaneously, generally need to weld successively, so not only need to move and reinstall setting circle pipe fitting 5 or automatic welder(welding machine), be more difficult to the welding quality ensureing described some circumferential welds.And use the automatic soldering method proposed in the present invention, the some welds needing to carry out circumferential weld welding can be had on pipe part 5, an automatic welder(welding machine) is configured for often locating described weld, this automatic welder(welding machine) adopts the automatic soldering method of above-mentioned circumferential weld, by arranging the welding control system of described automatic welder(welding machine), make automatic welder(welding machine) synchronously can carry out the automatic welding of described circumferential weld, thus realize the synchronous welding to described pipe part 5.When making automatic welder(welding machine) synchronously carry out automatic welding, the welding control system that every platform welds can be arranged to synchronously, namely the identical initial weld position set and initial weld angle, and drive respective welding head 2 to carry out automatic Arc Welding simultaneously, finally synchronously complete the welding of some circumferential welds of described pipe part 5.Many places circumferential weld after such welding can have roughly the same mechanical performance etc.Certainly, when the welding control system of every platform automatic welder(welding machine) be identical control system and can integrated, when such as described welding control system is PLC control system, can develop described PLC control system makes multiple described PLC control system be integrated into a total welding control system, thus Synchronization Control multiple stage automatic welder(welding machine) can be carried out by a total welding control system, realize the synchronous welding of some circumferential welds.
According to automatic soldering method of the present invention, when automatically regulating welding position and the soldering angle of welding gun 1, because welding gun 1 does not rotate, thus the automatic control of Butt welding gun 1 is relatively easy and control program is also simpler.In the present embodiment, by the welding position governor motion in the welding control system (not shown) automatic control soldering head 2 of automatic welder(welding machine) and soldering angle governor motion, thus automatically regulate the welding position of described welding gun 1 on three-dimensional and soldering angle, what make can to realize welding gun 1 in automatic Arc Welding carries rifle automatically, thus automatically completes the welding of circumferential weld.This automatic welding mode is particularly useful for the circumferential weld welding of multilayer multiple tracks, can not only increase welding efficiency, more can improve welding precision.
Be described in detail above by the automatic soldering method of concrete embodiment to circumferential weld of the present invention, but it is only illustrative, and it is nonrestrictive, within scope disclosed in this invention, those of ordinary skill in the art easily expect other various deformation or alternative.
It should be noted that; below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant or replacement to technical scheme of the present invention, these simple variant or replacement all belong to protection scope of the present invention.
Claims (4)
1. the multilayer multiple tracks automatic soldering method of the circumferential weld of a pipe part, it is characterized in that, in welding process, described pipe part (5) rotates relative to welding gun (1), and the welding position of described welding gun (1) on three-dimensional and soldering angle can pass through welding head (2) and automatically regulate, to realize the automatic welding of circumferential weld; Wherein, in welding process, the gun tracking mechanism (3) pressed in described pipe part (5) surface by tensile force is used to avoid described pipe part (5) to produce circular runout, when described welding gun (1) is when carrying out the welding of described circumferential weld, the position that described welding gun (1) can follow described gun tracking mechanism (3) is moved, and described welding gun (1) can regulate automatically independent of described gun tracking mechanism (3);
Wherein, in welding process, automatically regulate described welding gun (1) relative to the axial location of described pipe part (5) by described welding head (2), realize the shunting welding of circumferential weld, described shunting welding process comprises:
1) welding gun (1) is regulated relative to the initial weld position of described pipe part (5) and soldering angle;
2) welding gun (1) starting the arc;
3) described pipe part (5) is driven to rotate, to complete the welding of first weld seam;
4) make described welding gun (1) automatically move axially to down the welding position of one weld seam by described welding head (2), regulate soldering angle, and complete down the welding of one weld seam;
5) step 4 is repeated), until complete the per pass weld seam welding of described circumferential weld;
Wherein, in welding process, automatically regulate described welding gun (1) relative to the radial position of described pipe part (5) by described welding head (2), realize the layering welding of circumferential weld, described layering welding process comprises:
A) welding gun (1) is regulated relative to the initial weld position of described pipe part (5) and soldering angle;
B) welding gun (1) starting the arc drive described pipe part (6) to rotate;
C) on ground floor weld seam, the welding of one or multi-channel weld seam is carried out by the welding of described shunting, to complete the welding of this layer of weld seam;
D) after completing the welding of ground floor weld seam, described welding gun (1) is made automatically to carry rifle by described welding head (2), be radially moved into the welding position of the first weld seam of lower one deck weld seam, regulate soldering angle, and weld the welding of described lower one deck weld seam by described shunting;
E) steps d is repeated), until complete every layer of weld seam welding of described circumferential weld.
2. the multilayer multiple tracks automatic soldering method of the circumferential weld of pipe part according to claim 1, wherein, in welding process, detect the temperature of the test point on described pipe part outer peripheral face in real time, the axial distance between the mid point of this test point and described circumferential weld is 75-100mm.
3. the multilayer multiple tracks automatic soldering method of the circumferential weld of pipe part according to claim 1, wherein, controls opening weldering and stopping weldering of described welding gun according to the temperature of described test point, the temperature of test point is remained in the scope of 100 °-200 °.
4. the multilayer multiple tracks automatic soldering method of the circumferential weld of pipe part according to claim 1, wherein, before welding, carries out preheating to the welding position of described pipe part (5).
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| CN201110316004.7A CN102357709B (en) | 2011-10-18 | 2011-10-18 | Automatic welding method for circumferential welding seam of round pipe |
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| CN201110316004.7A CN102357709B (en) | 2011-10-18 | 2011-10-18 | Automatic welding method for circumferential welding seam of round pipe |
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| CN102357709B true CN102357709B (en) | 2015-01-21 |
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| WO2013056414A1 (en) * | 2011-10-18 | 2013-04-25 | 中联重科股份有限公司 | Automatic welding method for circumferential welding seam of round pipe |
| CN102593688B (en) * | 2012-03-19 | 2014-07-16 | 辽宁省电力有限公司抚顺供电公司 | Portable welding device for communication coaxial cable joint |
| CN102615455B (en) * | 2012-04-18 | 2015-04-08 | 东莞埃欧热能技术有限公司 | Inner and outer circle welding benches for sheet of heat exchanger |
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| CN104493335B (en) * | 2014-12-17 | 2016-12-07 | 济南华信自动化工程有限公司 | Weld tracker |
| CN106607639A (en) * | 2015-10-26 | 2017-05-03 | 镇江中焱数控设备有限公司 | Automatic welding machine for stainless steel circumferential weld |
| CN106735988B (en) * | 2016-12-26 | 2018-09-21 | 重庆市永川区泰兴机械厂 | Ship hull surface welder |
| CN106735726B (en) * | 2016-12-26 | 2018-09-21 | 重庆市永川区泰兴机械厂 | Ship hull surface welding method |
| CN107030351A (en) * | 2017-06-16 | 2017-08-11 | 四川空分设备(集团)有限责任公司 | A kind of pipeline circumferential weld welding operator is filled with and pipeline welding equipment |
| CN110961764A (en) * | 2019-11-29 | 2020-04-07 | 江苏旭正信息科技有限公司 | Equipment suitable for steel pipe welding |
| CN111153159B (en) * | 2020-01-16 | 2021-07-13 | 浙江欧导自动化设备有限公司 | Spray printing equipment for round pipe fitting |
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