CN101310909A - Automatic welding process of skewed tube fillet of boiler separator - Google Patents

Automatic welding process of skewed tube fillet of boiler separator Download PDF

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Publication number
CN101310909A
CN101310909A CNA2008100403755A CN200810040375A CN101310909A CN 101310909 A CN101310909 A CN 101310909A CN A2008100403755 A CNA2008100403755 A CN A2008100403755A CN 200810040375 A CN200810040375 A CN 200810040375A CN 101310909 A CN101310909 A CN 101310909A
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CN
China
Prior art keywords
welding
welding gun
separator
welder
eccentric oblique
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CNA2008100403755A
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Chinese (zh)
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CN101310909B (en
Inventor
卢征然
杨学兵
亓安芳
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上海锅炉厂有限公司
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Priority to CN2008100403755A priority Critical patent/CN101310909B/en
Publication of CN101310909A publication Critical patent/CN101310909A/en
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Abstract

The invention relates to a submerged arc welding technology of an eccentric oblique crossing tube on a separator, which is characterized in that the technology of the invention includes the steps that one end of the separator is placed on a driven turning roll while the other end of the separator is clamped by a numerical control positioner; the processed eccentric oblique crossing tube and the separator are fixed at melting points; a welding device is moved to the welding part of the eccentric oblique crossing tube on the separator; a welding gun of the welding device is aligned with the position to be welded and the welding device is started so that the numerical control positioner rotates the separator; the synchronous displacement of the welding device coordinates with the synchronous interlinking of the welding gun of the welding device and the numerical control positioner, which leads to that the position to be welded of the eccentric oblique crossing tube is always at the horizontal position required by the submerged arc welding technology so as to realize the continuous automatic welding. The submerged arc welding technology of the invention has the advantages of significantly enhancing the productivity and welding quality, reducing the labor intensity and improving the working conditions.

Description

A kind of automatic welding process of skewed tube fillet of boiler separator
Technical field
The present invention relates to a kind of automatic welding process of skewed tube fillet of boiler separator, belong to eccentric automatic welding process of skewed tube fillet technical field on the station boiler separator.
Background technology
Along with the power station unit to big capacity, the direction of high parameter develops, the power station unit has been main carrying out the transition to based on the stage overcritical, the ultra supercritical unit from Subcritical Units.In overcritical, ultra supercritical unit boiler, do not have the drum in the plain cylindrical furnace, and replaced by steam-water separator.Therefore, separator has become very important parts in the current station boiler product, and the welding quality of steam-water separator is subjected to manufactory and user's great attention always.At present, the circumferential weld of separator can adopt automatic welding, and its welding quality can be guaranteed reliably.Go up welding quadrature base at mother's pipe (as drum, collection case and pressure vessel), because the appearance of saddle-shape welding machine, manual electric arc welding is also replaced by weldering automatically gradually.Up to now, owing to also be not used in the automatic welder(welding machine) of the eccentric oblique pipe on the separator, so, the welding of the eccentric oblique pipe on the separator can only be adopted manual welding, not only workload is big, and welder's technical ability, physical efficiency all there is very high requirement, its welding quality is difficult to be guaranteed, therefore, the manual welding technology that falls behind, become the bottle neck of raising labour productivity, guaranteeing product quality and increase output, pressed for the mechanization and the automatization level that improve in the separator production.
The maximum difficult point of the eccentric oblique pipe Lincoln weld on the separator is:
1. the intersection of the female pipe of eccentric oblique nozzle and separator is an asymmetric space saddle-shaped curve, during welding, because the upper and lower slope weldering that the welding position is in continuously alternately, the gradient is bigger, under the effect of gravity, easily running off in solder flux and molten bath, occurs defectives such as incomplete fusion when occurring undercut, downward welding in the inclined position when causing uphill welding, the appearance of weld severe exacerbation, directly influence welding quality, thereby become insoluble technological problems in the automatic submerged arc welding;
2. because the thermal deformation in the processing of the dimensional tolerance of workpiece self, pipe end and rigging error, the welding process all can cause when welding, misfit by the welding gun movement locus and the actual required welding shape line of calculated with mathematical model, thereby welding seam bias occurs;
3. the groove of single V-type sitting type varied angle, the weld seam in one week is non-constant section, and promptly the cladding amount of all different parts weld seams does not wait, thereby has increased the difficulty of automatic row's welding bead.
Based on above various reasons, also be not used in the automatic welder(welding machine) of this type of joint both at home and abroad so far, can only adopt manual welding.Along with development of numerical control (NC) technology, in the cutting industry, take the lead in introducing this technology, realized automatic discharge, cutting, obtained efficient, high-quality, economy, easy remarkable result, this provides referential precedent for call number control techniques in welding field.But because welding self, such as highfield, high-intensity magnetic field, weld seam is irregular, repeatability and poor dimensional precision, and the motion of welding gun can not move by Mathematical Modeling fully as burning torch, must be according to the welding position of reality, and correction in real time; In addition, automatic row's welding bead of multilayer variable cross-section has further strengthened the difficulty of control.Therefore, Numeric Control Technology combines with welding procedure, is to solve the eccentric oblique nozzle of the separator key of welding automatically.
Summary of the invention
The purpose of this invention is to provide eccentric skewed tube fillet automation of a kind of raising boiler and mechanization level, raise labour productivity, improve the automatic welding process of skewed tube fillet of boiler separator of the welding quality of eccentric skewed tube fillet.
For realizing above purpose, technical scheme of the present invention provides eccentric oblique pipe submerged welding process on a kind of separator, it is characterized in that its method is:
The first step, the pipe end of eccentric oblique pipe adopt sitting type list double V-groove, and bevel angle is 5 °-45 ° a varied angle;
Second step was placed on separator one end on the return idler frame, and the other end is clamped by the unit head of numerical control positioner;
In the 3rd step, the eccentric oblique pipe that processes is loaded onto positioning adapter and separator positions, spot welding;
The 4th step, separator is put in electrical heating, the welding position is carried out weld preheating, the weld preheating temperature is 200 ℃~250 ℃;
The 5th step moved on to eccentric oblique pipe weld on the separator with welder, and welder is connected with the PLC of control system;
In the 6th step, the welding gun of welder is aimed at position to be welded;
The 7th step, start welder, the gyration of the welding gun of welder is driven along eccentric oblique pipe outer wall rotation by AC servo motor, welding gun up and down and horizontal movement drive electronic cross balladeur train by AC servo motor and move, the variation at posture of welding torch angle is slided along the welding gun slide rail by AC servo motor drive welding gun and is realized, the positioner of numerical control simultaneously rotational separator, welding gun and the synchronous interaction of numerical control positioner, make the position to be welded of eccentric oblique pipe be in the desired horizontal level of submerged welding process all the time, realize continuously weldering automatically;
In the 8th step, postwelding is removed positioning adapter and root of weld with machine-tooled method, guarantees complete penetraction and fusion in welding.
Described welder is by on the cross balladeur train, welding gun reversing frame, welding gun slide rail, welding gun and bracing frame are formed, bracing frame is provided with the cross balladeur train, the cross balladeur train is connected with the welding gun slide rail by the welding gun reversing frame, welding gun is located in the welding gun slideway, the vertical lift axle of cross balladeur train and horizontal movement axle, welding gun reversing frame and welding gun are respectively equipped with AC servo motor, and welding gun is located in the welding gun slideway.
The present invention is by a four-shaft numerically controlled system of cover and a mechanism, the gyration of a separator of Collaborative Control and the three-axis moving of welding gun, realize welding gun along take over do in a week circumference, entad, the tangent line movement at the uniform velocity, the movement locus and the weld seam that had both guaranteed welding gun match, make the welding position be in the horizontal level that helps welding all the time again, avoided the climb and fall welding, thus guarantor's welding quality; Advanced control technology and solder technology are combined as a whole, realized the automatic submerged-arc welding of the eccentric skewed tube fillet of the bigger separator of difficulty, make the welding process of a complexity become simplification, labor productivity and welding quality have been increased substantially, significantly reduce labour intensity, improve working conditions the variety of issue that has occurred when fundamentally having solved manual welding.
Advantage of the present invention is can reduce manual welding owing to human factor has influence on the welding quality of the eccentric skewed tube fillet of separator, can increase substantially labor productivity and welding quality and can significantly reduce labour intensity, improves working conditions.
Description of drawings
Fig. 1 is a kind of automatic welding process of skewed tube fillet of boiler separator schematic diagram;
Fig. 2 is a separator skewed tube fillet slope type schematic diagram;
Fig. 3 is a skewed tube fillet of boiler separator automatic soldering device structural representation.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiment
As shown in Figure 1, be a kind of automatic welding process of skewed tube fillet of boiler separator schematic diagram, eccentric oblique pipe submerged welding process is on a kind of separator:
The first step, the pipe end of eccentric oblique pipe 9 adopt sitting type list double V-groove, and bevel angle is 5 °-45 ° a varied angle, as shown in Figure 2;
Second step was placed on separator 4 one ends on the return idler frame 1, and the other end is clamped by the unit head of numerical control positioner 2;
In the 3rd step, the eccentric oblique pipe 9 that processes is loaded onto positioning adapter and separator 4 positions, spot welding;
The 4th step, separator 4 is put in electrical heating, the welding position is carried out weld preheating, the weld preheating temperature is 200 ℃~250 ℃;
The 5th step moved on to eccentric oblique pipe 9 welds on the separator 4 with welder 3, and welder 3 is connected with the PLC of control system;
In the 6th step, the welding gun 8 of welder 3 is aimed at position to be welded;
The 7th step, start welder 3, the gyration of the welding gun 8 of welder 3 is driven along eccentric oblique pipe 9 outer walls rotation by AC servo motor, welding gun 8 up and down and horizontal movement drive electronic cross balladeur train 5 by AC servo motor and move, the variation of welding gun 8 attitude angle drives welding gun 8 by AC servo motor and realizes along 7 slips of welding gun slide rail, the positioner of numerical control simultaneously 2 rotational separator 4, welding gun 8 and 2 synchronous interactions of numerical control positioner, make the position to be welded of eccentric oblique pipe 9 be in the desired horizontal level of submerged welding process all the time, realize continuously weldering automatically;
In the 8th step, postwelding is removed positioning adapter and root of weld with machine-tooled method, guarantees complete penetraction and fusion in welding.
As shown in Figure 3, be skewed tube fillet of boiler separator automatic soldering device structural representation, described welder 3 is by on the cross balladeur train 5, welding gun reversing frame 6, welding gun slide rail 7, welding gun 8 and bracing frame 10 are formed, bracing frame 10 is provided with cross balladeur train 5, cross balladeur train 5 is connected with welding gun slide rail 7 by welding gun reversing frame 6, and welding gun 8 is located in the welding gun slideway 7, and the vertical lift axle of cross balladeur train 5 and horizontal movement axle, welding gun reversing frame 6 and welding gun 8 are respectively equipped with AC servo motor.According to the welding variables of welding procedure software and setting, arrange welding bead automatically, realize continuous welding.Welder 3 outsourcings, wherein welding procedure software is to go up process software in addition at the commercially available import programmable controller controls PLC of system (Programmable Logic Controller), by this software, amount of lap when welding can be set, the technological parameters such as amount of movement of per pass weld seam postwelding welding gun, welding parameter realizes row's welding bead automatically routinely, continuously weldering automatically.
In welding process, after finishing one weld seam, head rotates welding gun reversing frame 6 and welding gun 8 automatically, adjust the welding wire angle and realize row road automatically, can finish the welding job of separator oblique pipe automatically according to setting welding parameter welding gun 8, the process control of whole welding process all has the movement locus and the weld seam of welding procedure software control welding gun 8 positions to match, and realizes continuously weldering automatically.

Claims (2)

1. eccentric oblique pipe submerged welding process on the separator is characterized in that its method is:
The first step, the pipe end of eccentric oblique pipe (9) adopt sitting type list double V-groove, and bevel angle is 5 °-45 ° a varied angle;
Second step was placed on separator (4) one ends on the return idler frame (1), and the other end is clamped by the unit head of numerical control positioner (2);
In the 3rd step, the eccentric oblique pipe (9) that processes is loaded onto positioning adapter and separator (4) positions, spot welding;
The 4th step, separator (4) is put in electrical heating, the welding position is carried out weld preheating, the weld preheating temperature is 200 ℃~250 ℃;
The 5th step moved on to separator (4) with welder (3) and goes up eccentric oblique pipe (9) weld, and welder (3) is connected with the PLC of control system;
In the 6th step, the welding gun (8) of welder (3) is aimed at position to be welded;
The 7th step, start welder (3), the gyration of the welding gun (8) of welder (3) is driven by AC servo motor rotates along eccentric oblique pipe (9) outer wall, welding gun (8) up and down and horizontal movement drive electronic cross balladeur train (5) by AC servo motor and move, the variation of welding gun (8) attitude angle drives welding gun (8) by AC servo motor and realizes along welding gun slide rail (7) slip, while numerical control positioner (2) rotational separator (4), welding gun (8) and numerical control positioner (2) synchronous interaction, make the position to be welded of eccentric oblique pipe (9) be in the desired horizontal level of submerged welding process all the time, realize continuously weldering automatically;
In the 8th step, postwelding is removed positioning adapter and root of weld with machine-tooled method, guarantees complete penetraction and fusion in welding.
2. eccentric oblique pipe submerged welding process on a kind of separator according to claim 1, it is characterized in that, described welder (3) is by on the cross balladeur train (5), welding gun reversing frame (6), welding gun slide rail (7), welding gun (8) and bracing frame (10) are formed, bracing frame (10) is provided with cross balladeur train (5), cross balladeur train (5) is connected with welding gun slide rail (7) by welding gun reversing frame (6), welding gun (8) is located in the welding gun slideway (7), the vertical lift axle of cross balladeur train (5) and horizontal movement axle, welding gun reversing frame (6) and welding gun (8) are respectively equipped with AC servo motor.
CN2008100403755A 2008-07-09 2008-07-09 Automatic welding process of skewed tube fillet of boiler separator CN101310909B (en)

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Application Number Priority Date Filing Date Title
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CN101310909B CN101310909B (en) 2010-08-04

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101786210A (en) * 2009-01-23 2010-07-28 北京石油化工学院 Opening-nozzle saddle-shaped seam welding equipment
CN101844284A (en) * 2010-04-23 2010-09-29 北京工业大学 Centring gesture correcting member of full-position welding robot
CN101780590B (en) * 2009-01-20 2011-08-17 机械科学研究院哈尔滨焊接研究所 Numerical control submerged automatic arc welding device and numerical control submerged automatic arc welding method for saddle-shaped narrow bevel
CN102615399A (en) * 2012-03-27 2012-08-01 天津大学 Welding method for improving fatigue life of socket welding weld toe of branch pipe
CN102806414A (en) * 2012-08-20 2012-12-05 上海锅炉厂有限公司 Automatic welding process for full-through welding or non-full-through welding fillet weld of header pup joint
CN102962614A (en) * 2012-11-23 2013-03-13 保定天威集团有限公司 Semi-automatic welding system for flange of transformer tank cover
CN103111718A (en) * 2013-01-22 2013-05-22 北京中电华强焊接工程技术有限公司 Automatic welding system for header welding
CN103273175A (en) * 2013-06-07 2013-09-04 哈电集团(秦皇岛)重型装备有限公司 Bismuth-free stainless steel flux cored wire gas shielded welding technology for connecting pipes
CN103962761A (en) * 2013-02-05 2014-08-06 新疆大学 Fast-assembled numerical-control double-head three-dimensional curve welding machine
CN105033420A (en) * 2015-07-30 2015-11-11 益阳金沙重型机械制造有限公司 Welding method for furnace wall and furnace door oxygen lance
CN105290692A (en) * 2015-12-01 2016-02-03 方圆电气股份有限公司 Steel pipe tower elevation plane flange deflection welding equipment
CN109719409A (en) * 2017-10-31 2019-05-07 上海宝冶集团有限公司 Endless tube saddle-shape intersects branch pipe automatic soldering method
CN110202238A (en) * 2019-06-20 2019-09-06 中国核工业第二二建设有限公司 Reinforced steel bar perforation plug welding method

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101780590B (en) * 2009-01-20 2011-08-17 机械科学研究院哈尔滨焊接研究所 Numerical control submerged automatic arc welding device and numerical control submerged automatic arc welding method for saddle-shaped narrow bevel
CN101786210A (en) * 2009-01-23 2010-07-28 北京石油化工学院 Opening-nozzle saddle-shaped seam welding equipment
CN101786210B (en) * 2009-01-23 2013-12-11 北京石油化工学院 Opening-nozzle saddle-shaped seam welding equipment
CN101844284A (en) * 2010-04-23 2010-09-29 北京工业大学 Centring gesture correcting member of full-position welding robot
CN102615399A (en) * 2012-03-27 2012-08-01 天津大学 Welding method for improving fatigue life of socket welding weld toe of branch pipe
CN102806414B (en) * 2012-08-20 2014-09-03 上海锅炉厂有限公司 Automatic welding process for full-through welding or non-full-through welding fillet weld of header pup joint
CN102806414A (en) * 2012-08-20 2012-12-05 上海锅炉厂有限公司 Automatic welding process for full-through welding or non-full-through welding fillet weld of header pup joint
CN102962614A (en) * 2012-11-23 2013-03-13 保定天威集团有限公司 Semi-automatic welding system for flange of transformer tank cover
CN103111718A (en) * 2013-01-22 2013-05-22 北京中电华强焊接工程技术有限公司 Automatic welding system for header welding
CN103111718B (en) * 2013-01-22 2015-05-20 北京中电华强焊接工程技术有限公司 Automatic welding system for header welding
CN103962761A (en) * 2013-02-05 2014-08-06 新疆大学 Fast-assembled numerical-control double-head three-dimensional curve welding machine
CN103273175A (en) * 2013-06-07 2013-09-04 哈电集团(秦皇岛)重型装备有限公司 Bismuth-free stainless steel flux cored wire gas shielded welding technology for connecting pipes
CN103273175B (en) * 2013-06-07 2015-12-02 哈电集团(秦皇岛)重型装备有限公司 Adapter is without bismuth stainless flux-cored wire gas shielded welding progress
CN105033420A (en) * 2015-07-30 2015-11-11 益阳金沙重型机械制造有限公司 Welding method for furnace wall and furnace door oxygen lance
CN105290692A (en) * 2015-12-01 2016-02-03 方圆电气股份有限公司 Steel pipe tower elevation plane flange deflection welding equipment
CN105290692B (en) * 2015-12-01 2016-09-14 方圆电气股份有限公司 A kind of steel tube tower elevation plane flange deflection welding equipment
CN109719409A (en) * 2017-10-31 2019-05-07 上海宝冶集团有限公司 Endless tube saddle-shape intersects branch pipe automatic soldering method
CN110202238A (en) * 2019-06-20 2019-09-06 中国核工业第二二建设有限公司 Reinforced steel bar perforation plug welding method

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