CN104708172A - Full penetration weld method for fillet joint single-face J-shaped groove of box beam of vibration screen - Google Patents
Full penetration weld method for fillet joint single-face J-shaped groove of box beam of vibration screen Download PDFInfo
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- CN104708172A CN104708172A CN201510077627.1A CN201510077627A CN104708172A CN 104708172 A CN104708172 A CN 104708172A CN 201510077627 A CN201510077627 A CN 201510077627A CN 104708172 A CN104708172 A CN 104708172A
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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
- B23K9/16—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
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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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
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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
- B23K9/02—Seam welding; Backing means; Inserts
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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
- B23K2101/28—Beams
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Abstract
The invention provides a full penetration weld method for a fillet joint single-face J-shaped groove of a box beam of a vibration screen. According to the full penetration weld method, a weld back-up member is not additionally arranged, a general welding robot having a linear locating function is selected, weld joint molten bath forming influence factors and quantitative factor indexes formed by the technical features of a weld joint molten bath are effectively controlled, it is guaranteed that molten bath forming can be continuously and stably controlled in the welding process, and full penetration of the fillet joint single-face J-shaped groove of the type is achieved. By the adoption of the full penetration weld method, the problems in the welding process of similar fillet joint single-face J-shaped grooves of box beams of vibration screens, permanent backing-up members are not allowed to be used, different degrees of incomplete fusion and incomplete penetration are caused when detachable baking-up members are adopted, and full penetration of the weld joint cannot be guaranteed are solved, the welding technology process is simplified, the comprehensive production cost is greatly reduced, the efficiency is greatly improved by about two times, the labor intensity of welding operators is greatly relieved, and the welding quality of products is improved.
Description
Technical field
The present invention relates to structural part of steel plate full penetration weld welding technology field, specifically a kind of vibrating screen box ellbeam corner joint single-J groove complete penetration welding method.
Background technology
Banana-shaped linear vibrating screen has a kind of crossbeam (hereinafter referred to as crossbeam) installing vibrator, belong to a kind of typical semiclosed welded box girder structure, the inside and outside angle welding form of such structural design many employings corner joint overlap joint, is shown in accompanying drawing 1.At present, single groove weldering opened by the corner joint that box girder structure is similar therewith, and general way is reserved butt-joint clearance, adopts the method adding composition backing inside wing plate to ensure weld seam full penetration, sees accompanying drawing 2.But for vibratory sieve product, the design of its sieve nest barycenter is the key factor that screen(ing) machine reliability is considered, and crossbeam is in the centre of form position of sieve nest, increases the centroid position that own wt can change screen(ing) machine.Therefore, design does not allow adopt permanent backing plate.And adopt detachable backing plate, relate in one aspect to the special material such as pottery, red copper, engineering construction is too loaded down with trivial details, and process control cost is higher; On the other hand more because implementing controlling unit, control improper sealing run and there will be root incomplete fusion in various degree and the defect such as lack of penetration on the contrary, the whole penetration of weld seam cannot be ensured.Single groove of opening for this type of box-girder small-scale structure welds, and except adopting the method for composition backing, GTAW bottoming also can be adopted to ensure the welding method of root of weld full penetration, again capping.But the method is for vibrating screen beam structure welding, because weld seam workload is comparatively large, GTAW efficiency is too low, and welding quality is wayward, and cost of labor is also higher.
Summary of the invention
The corner joint that the object of the invention is to solve similar vibrating screen box ellbeam opens single-J groove weldering because not allowing to adopt permanent backing plate, and adopt detachable backing plate can cause root of weld incomplete fusion in various degree and lack of penetration, the problem of the whole penetration of weld seam cannot be ensured, and a kind of vibrating screen box ellbeam corner joint single-J groove complete penetration welding method is provided.In the present invention, the box girder structure of banana-shaped linear vibrating screen is designed to corner joint and opens single groove weldering form, this box girder structure comprises base plate, cover plate and is located at the wing plate between the two two ends, groove is offered outside the two ends of wing plate, see accompanying drawing 2, this weld seam 100% full penetration of application claims, weldquality reaches I grade of requirement in GB/T3323 radiographic inspection standard.At present, not yet find in, in large-scale banana-shaped linear vibrating screen that the design of this type of box girder structure adopts corner joint to open single groove weldering form.
In principle, the key of weld seam one side welding with back formation is that molten bath is shaped and is able to continuous, stable state control." continuously the molten hole control technology " of such as SMAW banjo fixing butt jointing one side welding with back formation, its key problem in technology is rationally determining and strictly controlling of banjo fixing butt jointing root face, butt-joint clearance, weld procedure specification parameter etc., and form the molten hole of welding bottom molten bath in welding process and keep molten hole continuously and stable.Therefore, the quantitative key element index that the influence factor be shaped by butt welded seam molten bath and technical characteristic thereof are formed control effectively, and in maintenance welding process, molten bath shaped state is continuous, stable, can realize corner joint bevel one side welding with back formation.Therefore, for not adding composition backing, realizing the corner joint single groove full penetration of the box-girder of similar vibrating screen beam structure, the present invention is achieved through the following technical solutions:
A kind of vibrating screen box ellbeam corner joint single-J groove complete penetration welding method, comprises the steps:
1) select the General welding machine people with straight line positioning function, welding robot possesses welding bead track tutorial function; The impact that the component rigging error that can make up welding bead track tutorial function causes, ensures the uniformity of welding gun track and groove welding bead positional precision, plays the advantage that automatic welding process can be able to stability contorting simultaneously;
2) to draw materials debugging test plate (panel) from mother metal body, ensure that groove dimensional accuracy and product technology require strict conformance, welding procedure qualification test is carried out by debugging test plate (panel), finally determine the Con trolling index of the quantitative key element that weld seam molten bath shaping influence factor and technical characteristic thereof are formed, comprise groove type and size, welding wire point position, welding gun inclination angle, dry extension of electrode, the Con trolling index of the quantitative key element of protective gas and flow and fit-up gap formation, strict effectively control is carried out to it, realize the quantification of welding process, parametrization and becoming more meticulous, keeping molten bath in welding process to be shaped is able to continuously, stable state controls,
3) under the prerequisite control effectively at the Con trolling index of the quantitative key element obtained welding procedure qualification test, pass through welding procedure qualification test, determine the weld procedure specification parameter matched, weld procedure specification parameter is the deciding factor determining that weld seam molten bath is shaped;
4) product welds prepares: 1. part groove and dimensional accuracy strictly add guarantee by machine, guarantees the stability of welding bead linearity and welding arc; 2. correction of the flank shape is carried out to tack weld, avoid it to affect welding arc; 3. clear up groove welding bead and around without dirt, impurity, avoid pollution to enter molten bath and cause weld seam to produce the defect such as pore, slag inclusion;
5) formal welding product: 1. carry out the teaching of welding bead track by welding robot straight line positioning function; 2. the Con trolling index of quantitative key element is strictly controlled; 3. protective gas is carried with welding gun at back of weld in advance before welding; isolated air, the 4. process specification parameters determined of strict implement welding procedure qualification test.
Further, step 2) in finally determine that the Con trolling index of the quantitative key element that weld seam molten bath shaping influence factor and technical characteristic thereof are formed is as follows: 1. groove type selecting J-shaped groove, J-shaped root face p=2.5mm, J-shaped bevel angle β=25 °, J-shaped groove transition circle angle R=6 mm; 2. welding wire point position and welding gun welding wire point are apart from L bottom root face
sd=1.0-1.5mm; 3. welding gun inclination angle and welding wire axial centre plan range groove face top margin L
jd=1.0-1.5mm; 4. dry extension of electrode and nozzle edge are far from joint beam slab flat edge apart from L
gd=1.5-2.0mm; 5. protective gas selects rich argon to protect gas (80% argon gas+20%CO2), shield gas flow rate 18-22L/min; 6. fit-up gap and wing plate root face bottom surface are apart from joint beam slab flat edge apart from c=0-0.5mm; In step 3), weld procedure specification parameter is as follows: welding current I=280 ± 10A, U=29 ± 2v, speed of welding 400-450mm/min.
The inventive method does not add composition backing, by selecting the General welding machine people with straight line positioning function, the quantitative key element index that butt welded seam molten bath shaping influence factor and technical characteristic thereof are formed control effectively, keep molten bath in welding process to be shaped and be able to continuous, stable state control, realize such corner joint single-J groove full penetration.
Compared with prior art, beneficial effect of the present invention is as follows:
1) the inventive method does not add composition backing, achieve the corner joint single-J groove weldering full penetration of similar vibrating screen box ellbeam, the corner joint solving similar vibrating screen box ellbeam opens single-J groove weldering because not allowing to adopt permanent backing plate, and adopt detachable backing plate to cause root of weld incomplete fusion in various degree and lack of penetration because of the improper meeting of the loaded down with trivial details control of implementation process, the problem of the whole penetration of weld seam cannot be ensured;
2) the inventive method does not add composition backing, avoids the additional processing cost of detachable backing plate and controlling cost of complicated processes, simplifies welding procedure, improve operating efficiency, greatly reduce comprehensive production cost;
3) the inventive method applies increasingly extensive General welding machine people (speed of welding 400-600mm/min) in adopting current welding engineering to put into practice, compare GTAW weld seam bottoming (speed of welding 250-300mm/min), efficiency improves twice nearly, greatly reduce the labour intensity of welding operation personnel simultaneously, improve the welding quality of product.
Accompanying drawing explanation
Fig. 1 is the cross-sectional figure of inside and outside angle welding of box girder structure corner joint overlap joint.
Fig. 2 is that box girder structure corner joint is opened single groove and welded cross-sectional figure.
Fig. 3 is J-shaped groove type and size characteristic enlarged drawing.
Fig. 4 is weld seam molten bath shaping influence factor and technical characteristic quantitative key element index schematic diagram thereof.
In figure: outside fillet (weld), 6-composition backing, 7-J shape groove, 8-welding gun, 9-J-shaped root face, 10-J shape groove transition circle angle, 11-J shape bevel angle, 12-welding wire point position, 13-welding gun inclination angle, 14-dry extension of electrode, 15-fit-up gap in 1-base plate, 2-wing plate, 3-cover plate, 4-corner joint overlapping part, 5-corner joint overlap joint.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figures 1 to 4, a kind of vibrating screen box ellbeam corner joint single-J groove complete penetration welding method, comprises the steps:
1) select the General welding machine people with straight line positioning function, welding robot possesses welding bead track tutorial function, specifically selects the KR16-2 welding robot of KUKA company;
2) to draw materials debugging test plate (panel) from mother metal body, welding procedure qualification test is carried out by debugging test plate (panel), finally determine the Con trolling index of the quantitative key element that weld seam molten bath shaping influence factor and technical characteristic thereof are formed, comprise the Con trolling index of the quantitative key element that groove type and size, welding wire point position, welding gun inclination angle, dry extension of electrode, protective gas and flow and fit-up gap are formed, strict effectively control is carried out to it, realize the quantification of welding process, parametrization and become more meticulous, keeping molten bath in welding process to be shaped and be able to continuous, stable state control; Concrete evaluation is with joint penetration root face, back-welding shape and meet I grade of requirement in GB/T3323 radiographic inspection standard and be as the criterion; Selection horizontal position, welding position, droplet transfer is by the lateral thrust of electric arc, molten bath has base plate support to retrain, and droplet transfer condition compares horizontal welding position very big improvement, finally determines that the Con trolling index of the quantitative key element that weld seam molten bath shaping influence factor and technical characteristic thereof are formed is as follows:
1. groove type selecting J-shaped groove, J-shaped root face p=2.5mm, J-shaped bevel angle β=25 °, J-shaped groove transition circle angle R=6 mm, groove size and precision add guarantee by machine; 2. welding wire point position and welding gun welding wire point are apart from L bottom root face
sd=1.0-1.5mm; 3. welding gun inclination angle and welding wire axial centre plan range groove face top margin L
jd=1.0-1.5mm; 4. dry extension of electrode and nozzle edge are far from joint beam slab flat edge apart from L
gd=1.5-2.0mm; 5. protective gas selects rich argon to protect gas (80% argon gas+20%CO2), shield gas flow rate 18-22L/min; 6. fit-up gap and wing plate root face bottom surface are apart from joint beam slab flat edge apart from c=0-0.5mm;
3) under the prerequisite control effectively at the Con trolling index of the quantitative key element obtained welding procedure qualification test, by welding procedure qualification test, determine the weld procedure specification parameter matched, determine welding current I=280 ± 10A, U=29 ± 2v, speed of welding 400-450mm/min; In welding process, examine the mother metal part that the change in molten bath and electric arc fully will melt groove both sides, keep molten bath clear and be ellipse, note the stability of observing splashing and the red arc light appeared from groove fit-up gap in sealing run arc position front simultaneously, timely fine setting arc voltage and speed of welding, keep that molten bath shaped state in welding process is able to continuously, stability contorting;
4) product welds prepares: 1. part groove and dimensional accuracy strictly add guarantee by machine, guarantees the stability of welding bead linearity and welding arc; 2. carry out correction of the flank shape to tack weld, avoid it to affect welding arc, concrete operations can be polishing tack weld and groove mother metal rounding off, expose metallic luster, blow off metal dust with low-pressure air; 3. clear up without dirt, impurity within the scope of groove welding bead and surrounding 20-30mm, avoid pollution to enter molten bath and cause weld seam to produce the defect such as pore, slag inclusion, cleaning position low-pressure air blows off;
5) formal welding product: 1. carry out the teaching of welding bead track by welding robot straight line positioning function; 2. the Con trolling index of quantitative key element is strictly controlled; 3. protective gas is carried with welding gun at back of weld in advance before welding; isolated air, the 4. process specification parameters determined of strict implement welding procedure qualification test.Test after having welded, fillet in normal shear outward appearance scalelike mark is consistent, surface smoothing, and groove both sides are without undercut; Sealing run forms the angle welding of 1-2mm, and welding bead is straight, and smooth surface is smooth, reaches effect and the requirement that single-J groove full penetration opened by box-girder corner joint.
In addition, the present invention opens for the corner joint of similar vibrating screen box ellbeam the method that single-J groove welds full penetration, in engineering practice, the weld seam welding number of plies is selected according to the thickness of docking steel plate: when docking steel plate thickness t≤8mm, welding seam design completes for one time; During t > 8-12mm, a welding seam design bottoming, a capping; During t > 12-16mm, a welding seam design bottoming, a filling, a capping, for filling weldering wherein, cosmetic welding without particular/special requirement.
Claims (2)
1. a vibrating screen box ellbeam corner joint single-J groove complete penetration welding method, is characterized in that, comprise the steps:
1) select the General welding machine people with straight line positioning function, welding robot possesses welding bead track tutorial function;
2) to draw materials debugging test plate (panel) from mother metal body, welding procedure qualification test is carried out by debugging test plate (panel), finally determine the Con trolling index of the quantitative key element that weld seam molten bath shaping influence factor and technical characteristic thereof are formed, comprise the Con trolling index of the quantitative key element that groove type and size, welding wire point position, welding gun inclination angle, dry extension of electrode, protective gas and flow and fit-up gap are formed, strict effectively control is carried out to it, realize the quantification of welding process, parametrization and become more meticulous, keeping molten bath in welding process to be shaped and be able to continuous, stable state control;
3), under the prerequisite control effectively at the Con trolling index of the quantitative key element obtained welding procedure qualification test, by welding procedure qualification test, the weld procedure specification parameter matched is determined;
4) product welds prepares: 1. part groove and dimensional accuracy strictly add guarantee by machine, guarantees the stability of welding bead linearity and welding arc; 2. correction of the flank shape is carried out to tack weld, avoid it to affect welding arc; 3. clear up groove welding bead and around without dirt, impurity, avoid pollution to enter molten bath and cause weld seam to produce the defect such as pore, slag inclusion;
5) formal welding product: 1. carry out the teaching of welding bead track by welding robot straight line positioning function; 2. the Con trolling index of quantitative key element is strictly controlled; 3. protective gas is carried with welding gun at back of weld in advance before welding; isolated air, the 4. process specification parameters determined of strict implement welding procedure qualification test.
2. a vibrating screen box ellbeam corner joint single-J groove complete penetration welding method, it is characterized in that: step 2) in finally determine that the Con trolling index of the quantitative key element that weld seam molten bath shaping influence factor and technical characteristic thereof are formed is as follows: 1. groove type selecting J-shaped groove, J-shaped root face p=2.5mm, J-shaped bevel angle β=25 °, J-shaped groove transition circle angle R=6 mm; 2. welding wire point position and welding gun welding wire point are apart from L bottom root face
sd=1.0-1.5mm; 3. welding gun inclination angle and welding wire axial centre plan range groove face top margin L
jd=1.0-1.5mm; 4. dry extension of electrode and nozzle edge are far from joint beam slab flat edge apart from L
gd=1.5-2.0mm; 5. protective gas selects rich argon to protect gas, shield gas flow rate 18-22L/min; 6. fit-up gap and wing plate root face bottom surface are apart from joint beam slab flat edge apart from c=0-0.5mm; In step 3), weld procedure specification parameter is as follows: welding current I=280 ± 10A, U=29 ± 2v, speed of welding 400 ~ 450mm/min.
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| CN105031831A (en) * | 2015-07-14 | 2015-11-11 | 常州宝菱重工机械有限公司 | Medical proton instrument therapy cabin rotating ring |
| CN107745204A (en) * | 2017-06-14 | 2018-03-02 | 中交第二航务工程局有限公司 | A kind of U ribs weld joint on inner side repair method |
| CN108788387A (en) * | 2018-07-27 | 2018-11-13 | 海洋石油工程股份有限公司 | The welding quality control method of Deep Water Steel catenary riser |
| CN108971792A (en) * | 2018-09-19 | 2018-12-11 | 隆华科技集团（洛阳）股份有限公司 | A kind of groove process for angle joint abutment joint one side welding with back formation |
| CN110102929A (en) * | 2019-06-24 | 2019-08-09 | 大连中远海运川崎船舶工程有限公司 | A kind of welding method for the narrow cabin of ship |
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| CN107745204A (en) * | 2017-06-14 | 2018-03-02 | 中交第二航务工程局有限公司 | A kind of U ribs weld joint on inner side repair method |
| CN108788387A (en) * | 2018-07-27 | 2018-11-13 | 海洋石油工程股份有限公司 | The welding quality control method of Deep Water Steel catenary riser |
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| CN108971792A (en) * | 2018-09-19 | 2018-12-11 | 隆华科技集团（洛阳）股份有限公司 | A kind of groove process for angle joint abutment joint one side welding with back formation |
| CN110102929A (en) * | 2019-06-24 | 2019-08-09 | 大连中远海运川崎船舶工程有限公司 | A kind of welding method for the narrow cabin of ship |
| CN110181189A (en) * | 2019-06-27 | 2019-08-30 | 广船国际有限公司 | A kind of welding method of CM node groove |
| CN110181189B (en) * | 2019-06-27 | 2021-04-02 | 广船国际有限公司 | Welding method of CM node groove |
| CN111906408A (en) * | 2019-07-31 | 2020-11-10 | 中车大同电力机车有限公司 | Manufacturing method of T-shaped joint |
| CN112496616A (en) * | 2020-11-20 | 2021-03-16 | 薛月飞 | Automatic change car anticollision roof beam welding and melt hole equipment |
| CN112496616B (en) * | 2020-11-20 | 2022-06-21 | 安徽铭大汽车科技有限公司 | Automatic change car anticollision roof beam welding and melt hole equipment |
| CN112775627A (en) * | 2020-12-29 | 2021-05-11 | 山东鲁能光大钢结构有限公司 | Welding method for plate splicing welding channel steel |
| CN113172302A (en) * | 2021-04-12 | 2021-07-27 | 中煤北京煤矿机械有限责任公司 | Welding method for fusion welding of hydraulic support structural part |
| CN114289839A (en) * | 2021-12-17 | 2022-04-08 | 中铁宝桥（扬州）有限公司 | Welding wire alignment method for U-rib gas shielded welding |
| CN114769923A (en) * | 2022-04-20 | 2022-07-22 | 中国三峡建工(集团)有限公司 | Welding method for cantilever structure with rib plate |
| CN114769923B (en) * | 2022-04-20 | 2023-06-09 | 中国三峡建工(集团)有限公司 | Welding method of cantilever structure with rib plates |
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