CN102825371B - Clamp for accurately welding thin-wall alloy strip - Google Patents
Clamp for accurately welding thin-wall alloy strip Download PDFInfo
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- CN102825371B CN102825371B CN201210267557.2A CN201210267557A CN102825371B CN 102825371 B CN102825371 B CN 102825371B CN 201210267557 A CN201210267557 A CN 201210267557A CN 102825371 B CN102825371 B CN 102825371B
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Abstract
The invention belongs to the technical field of welding and particularly relates to a clamp for accurately welding a thin-wall alloy strip. The clamp structurally comprises upper layer pressure plates, lower layer pressure plates, a copper cushion plate and a base, wherein the upper layer pressure plates are two rectangular pressure plates; the lower layer pressure plates are two rectangular pressure plates respectively with a wedged pressure plate head; the wedged pressure plate heads of the two rectangular pressure plates are oppositely arranged and form a compaction mechanism together with the copper cushion plate arranged below the lower layer pressure plates; a welding forming groove with the width of 2mm is milled in the center of the copper cushion plate along the length direction; back surface argon shield holes with the diameter of 1mm are also drilled in the center of the copper cushion plate at 50mm intervals; anti-interference grooves are respectively milled on the two wedged pressure plate heads; and the upper layer pressure plates are close to the edge of one side of the compaction mechanism; pushing bolts are assembled on the upper layer pressure plates at 40mm intervals; and a groove is arranged on each lower layer pressure plate corresponding to the middle position between every two pushing bolts along the width direction of the lower layer pressure plates. The clamp for accurately welding the thin-wall alloy strip is suitable for welding plates and ultrathin strips with the thickness smaller than 1.5mm and is beneficial to ensuring pre-welding assembly accuracy and optimizing welding process parameters.
Description
Technical field
The invention belongs to welding technology field, be specifically related to a kind of fixture for thin wall alloy band precision welding.
Background technology
The circle of obturaging of novel aero-engine, W ring and mozzle are precision form part, and it is very high to the requirement of dimensional accuracy and deflection, adopt conventional soldering method to be difficult to the reliable connection and the shaping that realize them.Diameter as circle part of obturaging is large, design size is strict, the liquid shaping butt welded seam quality requirement that rises is high, and the industrial Laser Welding method that once adopted carries out butt welding, but appearance of weld is poor and weld seam two ends exist local burns, therefore, this part relies on import to meet reseach of engine demand for a long time.
MICROBEAM PLASMA WELDING method is adopted to solve above-mentioned technical problem, micro beam plasma welding is a kind of fine welding method, it has that quality of weld seam molding is high, weld width is narrow (usual weld width is suitable with thickness of slab) and the feature such as post welding distortion amount is little, is particularly suitable for docking the welding of thickness at the thin wall alloy band of below 0.3mm.But, at the thin wall alloy band of below 0.3mm, very strict matching requirements are welded with for thickness, its butt-joint clearance is maximum can not exceed 20% of mother metal thickness, unfitness of butt joint is maximum can not exceed 40% of mother metal thickness, otherwise very easily formed and burn, therefore, the fixture butt welding postforming of welding for ultra-thin alloy strip steel rolled stock and quality thereof play a part very crucial.
Piano type weld jig conventional is at present on individual layer pressing plate, be provided with the pressure head that is similar to key shape, be used for compressing welding of belt specially, but the shortcoming that this spline structure exists can bring damage for ultra-thin strip itself, and individual layer pressure plate structure is unfavorable at any time according to the clamping elasticity of band alignment jig to be welded.
Summary of the invention
The problem of thin wall alloy band precision welding demand can not be met for existing weld jig, the invention provides a kind of fixture for thin wall alloy band precision welding, the Butt Assembling requirement of ultra-thin materials can be met, and quality of weld seam molding is high, deflection is minimum, weld properties data reach mother metal respective performances index.
Fixture for thin wall alloy band precision welding of the present invention comprises upper laminate, lower floor's pressing plate, copper pad and base, upper laminate is assemblied on lower floor's pressing plate, copper pad is embedded on base, upper laminate and lower floor's pressing plate two ends have groove, be fixed on base by the set bolt running through groove, wherein said upper laminate is the square pressing plate of two block lengths, lower floor's pressing plate is two pieces of rectangle pressing plates with wedge pressure wrench, the wedge pressure wrench of Liang Kuai lower floor pressing plate is oppositely arranged, jointly hold-down mechanism is formed with the copper pad be positioned at below lower floor's pressing plate, copper pad central authorities are milled with the wide welding fabrication groove of 2mm along its length, and be drilled with every 50mm the argon shield hole, the back side that diameter is 1mm, on two wedge pressure wrench, be milled with anti-interference groove simultaneously, described upper laminate, near a lateral edges of hold-down mechanism, is equipped with a puller bolt every 40mm, lower floor's pressing plate corresponds on the centre position of every two puller bolts, has groove along lower floor's pressing plate width.
Wherein said groove is greater than the diameter 8mm of set bolt along the length in platen width direction.
Described anti-interference slot pitch copper pad surface 3mm, width is 2.5mm.
On described lower floor's pressing plate, the width of groove is 7mm, and the degree of depth is 2/3 of laminated plate thickness.
Feature of the present invention and effective:
(1) pressing plate of the present invention is double-decker, near welding fabrication groove one lateral edges, one row's bolt is housed, pitch of bolts 40mm at upper laminate, twists bolt downwards and holds out against lower plywood, can ensure that reliable laminating of pressing plate and banjo fixing butt jointing compresses; The two ends of upper laminate and lower floor's pressing plate have groove, and the diameter of groove is greater than the diameter 8mm of puller bolt, such daylight opening can carry out 0 ~ 8mm free adjustment, all applicable at the sheet material of below 1.5mm, ultra-thin strip for throat thickness, be conducive to ensureing assembly precision and welding condition optimization before weldering;
(2) lower floor of the present invention pressing plate is overall compressing structure, compare with traditional piano type fixture and be conducive to ensureing the integral rigidity of banjo fixing butt jointing when pressing plate presses down, and avoid key pressure head to the damage of ultra-thin strip, simultaneously, slot in the width direction in laminated, which reduce the local stiffness of the corresponding puller bolt position of lower plywood, ensure that pressing plate evenly, reliably compresses for banjo fixing butt jointing, thrust regulates by hold-down bolt;
(3) the wedge pressure wrench of lower floor's pressing plate is milled with anti-interference groove; to weld 0.2mm band, daylight opening is 3mm, adds 5mm anti-interference groove altogether; maximum torch neck can be used like this for 8mm, be conducive to the argon shield effect strengthening butt welded seam.
Accompanying drawing explanation
Fig. 1 is the structural front view of the fixture for thin wall alloy band precision welding of the present invention;
Fig. 2 is the structure top view of the fixture for thin wall alloy band precision welding of the present invention;
Fig. 3 is the structure right view of the fixture for thin wall alloy band precision welding of the present invention;
Wherein, 1: upper laminate; 2: lower floor's pressing plate; 3: copper pad; 4: base; 5: set bolt; 6: puller bolt; 7: groove; 8: groove; 9: anti-interference groove; 10: welding fabrication groove.
Detailed description of the invention
Fixture for thin wall alloy band precision welding comprises upper laminate (1), lower floor's pressing plate (2), copper pad (3) and base (4), upper laminate (1) by bolts assemblies as shown in the figure on lower floor's pressing plate (2), copper pad (3) is embedded in (4) on base, upper laminate (1) and lower floor's pressing plate (2) two ends have groove (8), be fixed on base (4) by the set bolt (5) running through groove, wherein said upper laminate (1) is the square pressing plate of two block lengths, lower floor's pressing plate (2) is two pieces of rectangle pressing plates with wedge pressure wrench, the wedge pressure wrench of Liang Kuai lower floor pressing plate (2) is oppositely arranged, jointly hold-down mechanism is formed with the copper pad (3) being positioned at lower floor's pressing plate (2) below, it is 2mm welding fabrication groove (10) that copper pad central authorities are milled with width along its length, and be drilled with every 50mm the argon shield hole, the back side that diameter is 1mm, on two wedge pressure wrench, be milled with anti-interference groove (9) simultaneously, described upper laminate (1) is near a lateral edges of welding fabrication groove, a puller bolt (6) is equipped with every 40mm, the upper centre position corresponding to every two puller bolts (6) of lower floor's pressing plate (2), has groove (7) along lower floor's pressing plate (2) width.
Wherein said groove (8) is greater than the diameter 8mm of set bolt (5) along the length in platen width direction.
Described anti-interference groove (9) is apart from welding fabrication groove bottom 3mm, and width is 2.5mm.
The width of the upper groove (7) of described lower floor's pressing plate (2) is 7mm, and the degree of depth is 2/3 of lower floor's pressing plate (2) thickness.
Embodiment 1
Adopt the above-mentioned weld jig erection welding of invention design to obturage circle part, concrete steps are as follows:
Loop material of obturaging is GH738 alloy strip steel rolled stock, and supply of material state is annealed state, and finished heat treatment state is solid solution+aging state, and its main chemical compositions is in table 1.
The main chemical compositions of table 1GH738 alloy cold-strip
(1) welds prepares
Laser cutting blanking is adopted before weldering, ribbon dimension is 2580mm × 100mm, and subsidiary 50mm × 30mm welding test piece is no less than 4, for technological parameter demonstration test, before weldering, butt joint end face and joint both sides are about 3mm region, adopt stainless steel wire brush to carry out polishing, remove surface oxide layer and metal luster, with acetone or alcohol, weld jig fitting surface and preweld cleaning region are cleaned, wipe oil and other exotic.
(2) assembling compresses
Test piece to be welded or part are placed on weld jig, joint is just to welding fabrication groove central authorities, first side test piece or part one side are fixed, in adjustment, laminate (1) and joint clearance are between 2.5 ~ 3mm, tighten the set bolt (5) at laminate two ends, fine setting puller bolt (6), ensure evenly to compress, again opposite side test piece or part are pressed same method assembling to compress, should ensure between banjo fixing butt jointing, there is certain adhesive force therebetween as far as possible, be conducive to reducing gap, ensure assembling butt-joint clearance tolerance, prevent from burning, last adjustment simultaneously two puller bolts (5), test piece or part and copper pad (3) is made to fit well everywhere, ensure that assembling misalignment is at Measurement Allowance.
(3) welding machine and robot instruction
Check tungsten electrode scaling loss situation before weldering, find that tungsten electrode tip is oxidized when even scaling loss is turned black and again should grind tungsten electrode in time, check welding machine water-cooling, gas circuit and fault alarm etc., guarantee without any problem.
Carry out teaching to robot path, ensure that mobile route does not depart from joint to be welded, basic programming instruction is as follows:
ArcLStart?p1,v20,seam1,weld1,fine,tweldgun；
ArcLEnd?p2,v20,seam1,weld1,fine,tweldgun；
(4) technological parameter checking and welding
The test piece to be welded assembled first is carried out technological parameter checking, and generally at least test 2 is right, guarantees technological parameter stability, and when welding formal part, install run-on tab additional in the starting the arc, receipts arc position and receive arc plate, concrete welding condition is in table 2.
Table 2 MICROBEAM PLASMA WELDING high temperature alloy test technology parameter
(5) visual examination
The weld appearance of visual examination test piece or part and mother metal should be excessively round and smooth, and welding point surface is answered flawless, burnt, overlap and spatter thing, and the dislocation of banjo fixing butt jointing is not more than 20% of mother metal thickness.
(6) penetration inspection
Check the permeability of weld seam by HB/Z61-1998, face of weld is without linear display.
Claims (3)
1. the fixture for thin wall alloy band precision welding, it is characterized in that comprising laminate, lower floor's pressing plate, copper pad and base, upper laminate is assemblied on lower floor's pressing plate, copper pad is embedded on base, upper laminate and lower floor's pressing plate two ends have groove, be fixed on base by the set bolt running through groove, wherein said upper laminate is the square pressing plate of two block lengths, lower floor's pressing plate is two pieces of rectangle pressing plates with wedge pressure wrench, the wedge pressure wrench of Liang Kuai lower floor pressing plate is oppositely arranged, jointly hold-down mechanism is formed with the copper pad be positioned at below lower floor's pressing plate, copper pad central authorities are milled with the wide welding fabrication groove of 2mm along its length, and be drilled with every 50mm the argon shield hole, the back side that diameter is 1mm, on two wedge pressure wrench, be milled with anti-interference groove simultaneously, described upper laminate is near a lateral edges of hold-down mechanism, be equipped with a puller bolt every 40mm, lower floor's pressing plate correspond on the centre position of every two puller bolts, have groove along lower floor's pressing plate width, the width of groove is 7mm, and the degree of depth is 2/3 of laminated plate thickness.
2. a kind of fixture for thin wall alloy band precision welding according to claim 1, is characterized in that described groove is greater than the diameter 8mm of set bolt along the length in platen width direction.
3. a kind of fixture for thin wall alloy band precision welding according to claim 1, it is characterized in that described anti-interference slot pitch copper pad surface 3mm, width is 2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210267557.2A CN102825371B (en) | 2012-07-30 | 2012-07-30 | Clamp for accurately welding thin-wall alloy strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210267557.2A CN102825371B (en) | 2012-07-30 | 2012-07-30 | Clamp for accurately welding thin-wall alloy strip |
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| Publication Number | Publication Date |
|---|---|
| CN102825371A CN102825371A (en) | 2012-12-19 |
| CN102825371B true CN102825371B (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210267557.2A Expired - Fee Related CN102825371B (en) | 2012-07-30 | 2012-07-30 | Clamp for accurately welding thin-wall alloy strip |
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| CN102825371A (en) | 2012-12-19 |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |
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Granted publication date: 20141224 Termination date: 20200730 |