CN102941400B - Method for welding automobile aluminium alloy bumper assembly - Google Patents
Method for welding automobile aluminium alloy bumper assembly Download PDFInfo
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- CN102941400B CN102941400B CN201210453092.XA CN201210453092A CN102941400B CN 102941400 B CN102941400 B CN 102941400B CN 201210453092 A CN201210453092 A CN 201210453092A CN 102941400 B CN102941400 B CN 102941400B
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Abstract
A method for welding an automobile aluminium alloy bumper assembly belongs to the technical field of metal welding. The automobile aluminium alloy bumper assembly consists of a beam, an energy absorption box and a support, wherein two sets of welding tools are respectively adopted to weld the automobile aluminium alloy bumper assembly step by step, firstly, the energy absorption box and the support are welded with each other, and then, the energy absorption box and the support which are welded with each other are welded with the beam. A welding device can be adjusted and positioned according to the characteristics of weldments, and the weldments are fixed, so that deformation after the welding is avoided; and an alternating current electric welding machine is adopted for manual argon tungsten-arc TIG (tungsten insert gas) welding, the technological parameters of welding wire material, welding current, welding speed, wire feed speed and the like are adjusted so as to carry out optimal matching, and the welding defects can be avoided. The method has the characteristics of flexibility and simplicity in welding equipment, convenience in operation, stability in welding, quick welding speed, low production cost, less filler wires, less welding layers, small deformation, no correction for welding, attractiveness in appearance formation, high welding quality and the like.
Description
Technical field
The present invention relates to metal welding techniques and device field, especially a kind of aluminium alloys for automobile bumper assembly welding method.
Background technology
Along with people propose higher requirement to energy-saving and environmental protection, safety, the application of the light-weight high-strength materials such as aluminium alloy obtains extensive concern.Aluminium alloy has higher specific strength, fracture toughness, fatigue strength and corrosion-resistant stability, and process forming and welding performance good.
In automobile making, in order to improve the rigidity of automobile frame, alleviate the weight of automobile, improve the collision performance of automobile, aluminum alloy materials is widely applied.Along with the use of all-aluminium body automobile, the Welding Structure such as aluminum alloy extrusion section bar, thin plate plays a part more and more important in automobile, high-quality Welded structural member becomes the key components and parts in Hyundai Motor, and the large deformation mechanical behavior of research welded joints in aluminium alloy and structural member has great importance to car body manufacture shaping and collision safety design.
Welding, as a kind of Material Joining Technology, along with the further maximization of device structure and complicated, is all had higher requirement to the development of material and technology.How to realize the welding procedure of high-quality and high reliability, be the subject matter that people pay close attention to and study always.
The main method of attachment of aluminium alloy element is welding, and the method that Welded adopts both at home and abroad at present has the fusion welding methods such as argon tungsten-arc welding (TIG), consumable electrode gas argon arc welding (MIG), friction stir welding (FSW), Laser Welding (ISW), electron beam welding (EBW), plasma arc welding with adjustable polarity parameters (VPPAW) and multiple welding method combination.The aluminum alloy part serviceability that can obtain of welding, and meet the Structural Design Requirement of automobile.TIG welding process is stable, protects effectively, and financial cost is low, in industry, is widely used; TIG welding research process is simplified relatively in addition, and therefore mostly theory and experimental study are to weld for TIG.
Aluminium alloy has that fusing point is low, the coefficient of heat conduction is large, coefficient of thermal expansion high, while adopting conventional melting technique welding, there will be bead crack tendency greatly, easily to produce the problems such as pore, residual stress of welded structure and residual deformation are larger, cause weld strength loss larger, weldquality can not be guaranteed.
The literature search of existing correlation technique is found, EP03077370 disclose " one is to aluminium alloy and stainless TIG welding method ", article for aluminium alloy and stainless TIG welding technique; EP03077370 discloses " a kind of TIG welding method and device ", and article realizes by specific device the method that substitutes existing TIG welding circuit control technology; CN101474709 discloses " a kind of aluminium and aluminium alloy handwork double-gun double-face TIG welding technique ", article a kind of aluminium and aluminium alloy handwork double-gun double-face TIG welding technique, its welding process adopts upward welding in the vertical position technique, two manual welding guns respectively welded joint just, the back side plays the technology of arc welding simultaneously; CN101767246A discloses " a kind of apparatus and method of the TIG of raising speed of welding ", and it,, mainly by improving arc shape, carries out high speed TIG weldering; CN102079004A discloses " the linerless single-sided welding double-sided shaping automatic TIG welding of aluminium alloy docking circumferential weld connects method ", article employing automatic tungsten anode argon arc welding machine carry out layering welding, realize the linerless single-sided welding double-sided shaping automatic TIG welding of aluminium alloy docking circumferential weld and connect method; CN101147995A discloses " a kind of Al pipe butt welding method, aluminium pipe type heat exchanger welding method and device for welding aluminium pipe ", article a kind of welding method and welder thereof of aluminium pipe type heat exchanger, aluminium sheet fin and U-shaped pipe are assembled, then weld the joint of long and short U-shaped pipe; CN102528259A discloses " a kind of limit fixing sleeve welding device ", article a kind of limit fixing sleeve welding device that is designed into piston lever of reducer for automobile sub-unit welding; CN101391356A discloses " a kind of adjustable welding device ", article a kind of adjustable controller that is applicable to have the welding work pieces that is symmetrically welded position.Above several method or device are to being all TIG welding procedure and the welder for concrete welding work pieces, can not be completely applicable during for other Al alloy parts, may there are various weld defects, the assembling such as welding deformation defect, need to carry out the formulation of concrete welding procedure and the design of device for concrete workpiece.
Summary of the invention
The present invention is directed to existing aluminium argon arc welding TIG solder technology and carried out welding technology optimization and welding and welder improvement, the welder that a kind of aluminium alloys for automobile bumper assembly welding method is provided and has used, the welding condition of optimizing by employing and welder carry out aluminum alloy bumper assembly welding method, as the optimization of the technological parameter such as welding wire and welding current is selected, welder is compared with general welder, flexibly, simply, can reduce weld defect and improve welding precision, realize batch production, boost productivity, avoid weld defect and distortion, reduce costs, there are good social economy and market prospects.
Technical scheme that object of the present invention adopts, its welding method step is as follows:
A, oil removing is cleaned: a kind of aluminium alloys for automobile bumper assembly is by crossbeam, energy-absorption box and support composition, respectively there are an energy-absorption box and support in two ends, wherein said crossbeam left and right, need to weld respectively the contact-making surface between energy-absorption box and crossbeam and support, joint form is T junction, welding is front with wire brush or sand papering crossbeam, the groove of energy-absorption box and support and neighboring area, put into and contain 93# gasoline solution container through polishing, flood and oil removal treatment, subsequently with cleaning weldment in the NaOH solution container of 5%-10% concentration, solution temperature requires 40-60 DEG C, scavenging period is 1-3min, take out with mobile clear water flushing, last natural air drying,
B, welding a: support is put to a support frock base plate, on support frock base plate, there are dowel hole and two bolts hole corresponding with dowel hole on support and two bolts hole, and position on support frock base plate, simultaneously three limits of support and support frock base plate centre are the limit positioned in alignment of ∏ shape line timber location notch hole, then energy-absorption box location-plate is put to support frock base plate and positioned, align with the each limit of support frock base plate in the each limit of energy-absorption box location-plate, and dowel hole on energy-absorption box location-plate is alignd with dowel hole on support, and locate by alignment pin, an energy-absorption box is put into energy-absorption box location-plate middle part Π v notch v, be matched in clearance between the two, for ensureing the perpendicularity between an energy-absorption box and a support, in an energy-absorption box, insert insert identical with interior hole size, insert and energy-absorption box endoporus between for matched in clearance, the compact heap of inserting on the upper surface of inserting has, the compact heap of inserting under energy-absorption box bottom face has, the clamping screw of inserting through the hole of the clamp of above inserting with under the clamp hole screw-internal thread fit of inserting, complete location and fastening between energy-absorption box and support, then take out energy-absorption box location-plate, adopt A.C. welder, manual TIG welding manner welds, welding wire is ER4043 or ER5183, diameter is 1.6-2.0mm, tungsten electrode diameter is 4.8-5.0mm, end is hemispherical, protective gas is argon gas, purity is 99.99%, nozzle diameter is 11-13mm, nozzle height 8.0-14mm, argon gas flow velocity is 7-10L/min, welding current is 151-200A, speed of welding is 30-60cm/min, wire feed rate is 108-117cm/min, four spot welding of position, four angles welding that contact with support at energy-absorption box, to fix energy-absorption box, then energy-absorption box four limits are adopted to above welding procedure, weld in full weld mode, adopt and weld in the same way another energy-absorption box and another support, complete the welding postwelding of energy-absorption box and support, keep 15-20min, after it is cooling, shed, under insert compact heap and the clamping screw of inserting,
Secondly, complete after the welding of a pair of energy-absorption box and support, weld the both sides that again two energy-absorption boxes contacted with crossbeam, crossbeam is placed on the good column support identical with crossbeam radian of adjusted, the middle part of crossbeam is placed between the depression bar and support bar of column support, two ends are placed on the support bar of another two column supports, by adjusting the number of column support, the height of position and support bar can be adjusted the radian that column support supports, to reach the object that coordinates crossbeam radian, by measuring the height of crossbeam both sides, the crossbeam of having good positioning, by depression bar, crossbeam is clamped on column support, column support can clamp at crossbeam width simultaneously, by the welding tooling device upset of two energy-absorption boxes that welded and support, make energy-absorption box down, by the upper lead hole of support frock base plate, support frock base plate is enclosed within on lead in newel post, the location of energy-absorption box on crossbeam is by location, lead hole on both sides, by crossbeam, after energy-absorption box and support are located and are clamped in assembly frock, start the contact-making surface of energy-absorption box and crossbeam to weld, for ensureing the precision of welding, weld simultaneously at two ends, left and right, adopt A.C. welder, manual TIG welding manner welds, welding wire is ER4043 or ER5183, diameter is 1.6-2.0mm, tungsten electrode diameter is 4.8-5.0mm, end is hemispherical, protective gas is argon gas, purity is 99.99%, nozzle diameter is 11-13mm, nozzle height 8.0-14mm, argon gas flow velocity is 7-10L/min, welding current is 151-200A, speed of welding is 30-60cm/min, wire feed rate is 108-117cm/min, first four angles place left and right sides energy-absorption box being contacted with crossbeam adopts spot welding, further to fix energy-absorption box position, then carry out full weld at energy-absorption box and crossbeam contact position, weld rear maintenance 15-20min, make the bumper assembly that welded cooling, then the alignment pin of releases clamp and support frock base plate, fastening bolt B and support frock base plate tighten bolt A at lead, take out support frock base plate, unclamp the adjusting bolt C of column support upperpush rod, take out depression bar, then take out the aluminum alloy bumper assembly having welded,
C, postwelding cleaning: postwelding is removed welding slag, brush the aluminum alloy bumper assembly welding with bristle, again at 60-80 DEG C, concentration is to embathe 5-10min in the potassium bichromate solution of 2%-3%, then use the hot water Washing of 40 DEG C, and check weldquality observes whether there are the defects such as field trash, bubble, crackle, distortion.
The welder that it uses: comprise support frock base plate, the clamping screw of inserting, insert, on insert compact heap, assembly tooling base, column support, column support base, lead, on the plate of aforesaid support frock base plate, on four jiaos, there are upper lead hole, centre to have three to be the support location notch hole that Π shape is arranged, on the support frock base plate of the support location notch hole that described Π shape is arranged, there are two internal thread holes and dowel hole, on four jiaos of four fastening bolt A and support frock base plate, the outer end wall internal thread in lead hole engages, and it is characterized in that:
On a, support frock base plate, be placed with L-shaped energy-absorption box location-plate, there is the breach that is Π shape at the top panel middle part of energy-absorption box location-plate, alignment pin is respectively through the dowel hole on energy-absorption box location-plate and the dowel hole on support frock base plate, inserting, upper surface is placed with the compact heap of inserting, lower surface is placed with down the compact heap of inserting, insert compress leading screw through the hole of the compact heap of above inserting with under the insert hole internal thread of compact heap engage, two fastening bolt B engage with internal thread hole on support frock base plate respectively, form energy-absorption box and bracket welding equipment device;
B, column support base is placed respectively in two ends, assembly frock base plate upper surface and centre, on column support base, be placed with two L shaped column supports, adjusting bolt A engages with column support base mider hole internal thread through the level board slotted hole of column support, in the middle of column support, be placed with support bar, adjusting bolt B engages with support bar end-face hole internal thread through the vertical plate slotted eye of column support, above the support bar of two middle column support dresses, there is depression bar, adjusting bolt C engages with depression bar end-face hole internal thread through middle column support vertical plate slotted eye, C shape anchorage clip blocks assembly frock base plate and column support base, fastening bolt D engages with hole internal thread on column support base limit through C shape anchorage clip upper branch arm plate hole, the both sides end face of assembly frock base plate has respectively four protruding ear pieces, there is recessed semicircular arc ear piece outer face, be placed with lead mount pad in the outer face of ear piece, lead mount pad end face has recessed semicircular arc, ear piece and lead mount pad form lower lead hole, fastening bolt C engages with ear piece end-face hole internal thread through lead mount pad end-face hole, lower lead hole is inserted in lead lower end, the upper lead hole of aforementioned welding tooling device upset after-poppet frock base plate is inserted in upper end.
The present invention, column support has 3-6.
The present invention, support bar has 3-6.
The present invention, C shape is fastening accompanies 6-12.
The present invention, the axial line of the axial line of the dowel hole axial line of support frock base plate, the dowel hole of energy-absorption box location-plate, the dowel hole of support is on same axial line.
The present invention, two internal thread holes of support frock seat board respectively with the axial line of two bolts hole of support on the same line.
The welding condition that the present invention optimizes by employing and welder carry out aluminum alloy bumper assembly welding method, as the optimization of the technological parameter such as welding wire and welding current is selected, welder is compared with general welder, flexibly, simply, can reduce weld defect and improve welding precision, it is simple that the present invention has welding equipment, easy to operate, and weldquality is high, realize batch production, boost productivity, avoid weld defect and distortion, the feature such as reduce costs.
Brief description of the drawings
Further illustrate the present invention below in conjunction with accompanying drawing.
Fig. 1 is aluminium alloys for automobile bumper assembly structure schematic diagram;
Fig. 2 is energy-absorption box and bracket welding equipment schematic diagram;
Fig. 3 is aluminium alloys for automobile bumper assembly welding tooling schematic diagram.
In figure: 1-support, 2-crossbeam, 3-energy-absorption box, 4-support frock base plate, 5-fastening bolt A, 6-energy-absorption box location-plate, 7-alignment pin, the 8-clamping screw of inserting, the compact heap of inserting on 9-, 10-inserts, the upper lead of 11-hole, 12-fastening bolt B, 13-support location notch hole, 14-assembly tooling base, 15-lead, 16-support bar, 17-depression bar, 18-lead mount pad, 19-fastening bolt C, 20-column support, 21-C shape anchorage clip, 22-column support base, 23-adjusting bolt C, 24-ear piece, 25-adjusting bolt B, 26-adjusting bolt A, 27-fastening bolt D.
Detailed description of the invention
Below in conjunction with Fig. 1, Fig. 2, Fig. 3, welding method embodiment and welder further illustrate the present invention.
The present invention is made up of crossbeam 2, energy-absorption box 3 and support 1, material is respectively 6061 aluminium alloys, 6063 aluminium alloys and 6005A aluminium alloy, respectively there are an energy-absorption box 3 and support 1 in wherein said crossbeam 2 two ends, left and right, the contact-making surface that need to weld energy-absorption box 3 respectively and between crossbeam 2 and support 1, joint form is T junction, energy-absorption box 3 is rectangular tube, and cross sectional shape is square, is of a size of 90mm
╳90mm, wall thickness is 2mm, and it highly differs, and a high side is 174mm, and a low side has 139mm, and support 1 Outside Dimensions is 125mm
╳218mm, wall thickness is 5mm, crossbeam 2 bending radius are 1332mm, crossbeam 2 length 1111mm, cross section is a day font, wall thickness is 2mm, before welding, with groove and the neighboring area of wire brush or sand papering aluminum alloy bumper crossbeam 2, energy-absorption box 3 and support 1, after polishing, put into and fill 93# gasoline solution container, carry out oil removal treatment, the NaOH solution container of putting into subsequently 6% concentration cleans weldment, and wherein solution temperature requires 50 DEG C, and scavenging period is 2min, then rinse last natural air drying weldment with mobile clear water, a support 1 is put to a support frock base plate 4, on support frock base plate 4, there are dowel hole and two bolts hole corresponding with dowel hole on support 1 and two bolts hole, and position on support frock base plate 4, simultaneously three limits of support 1 and support frock base plate 4 centres are the limit positioned in alignment of ∏ shape line timber location notch hole 13, then an energy-absorption box location-plate 6 is put to a support frock base plate 4 and positioned, align with support frock base plate 4 each limits in the each limit of energy-absorption box location-plate 6, and dowel hole on energy-absorption box location-plate 6 is alignd with dowel hole on support 1, and locate by alignment pin 7, an energy-absorption box 3 is put into the breach of the Π shape at energy-absorption box location-plate 6 middle parts, be matched in clearance between the two, for ensureing the perpendicularity between energy-absorption box 3 and support 1, in energy-absorption box 3, insertion is identical with interior hole size inserts 10, insert 10 and energy-absorption box 3 endoporus between for matched in clearance, inserting, 10 upper surfaces are placed with the compact heap 9 of inserting, the compact heap of inserting under the lower surface of energy-absorption box 3 has, insert compact heap screw mandrel 8 through the hole of the compact heap 9 of above inserting with under insert that compact heap hole internal thread engages and fastening, complete location and fastening between energy-absorption box 3 and support 1, then take out energy-absorption box location-plate 6, adopt A.C. welder, manual TIG welding manner welds, welding wire is ER5183, diameter is 2.0mm, tungsten electrode diameter is 5.0mm, end is hemispherical, protective gas is argon gas, purity is 99.99%, nozzle diameter is 13mm, nozzle height 14mm, argon gas flow velocity is 10L/min, welding current is 180A, speed of welding is 50cm/min, wire feed rate is 110cm/min, four spot welding of position, four angles welding that contact with support 1 at energy-absorption box 3, to fix energy-absorption box 3, then energy-absorption box 3 four limits are adopted to above welding procedure, weld in full weld mode, adopt and weld in the same way another energy-absorption box 3 and another support 1, complete after the welding of energy-absorption box 3 and support 1, keep 15-20min, after it is cooling, shed, under insert compact heap and the clamping screw 8 of inserting,
Secondly, complete after the welding of a pair of energy-absorption box 3 and support 1, again energy-absorption box 3 is welded with the both sides that crossbeam 2 contacts, crossbeam 2 is placed on the good column support 20 identical with crossbeam 2 radians of adjusted, crossbeam 2 middle parts are placed between the depression bar 17 and support bar 16 of column support 20, two ends are placed on the support bar 16 of another two column supports 20, by adjusting the number of column support 20, the height of position and support bar 16 can be adjusted the radian that column support 20 supports, to reach the object that coordinates crossbeam 2 radians, by measuring the height of crossbeam 2 both sides, the crossbeam 2 of having good positioning, by depression bar 17, crossbeam 2 is clamped on column support 20, column support 20 can clamp at crossbeam 2 widths simultaneously, welding tooling device upset by the both sides energy-absorption box having welded 3 with support 1, make energy-absorption box 3 down, by the upper lead hole 11 on support frock base plate 4, support frock base plate 4 is enclosed within the upper newel post of lead 15, the location of energy-absorption box 3 on crossbeam 2 by both sides on lead hole 11 locate, by crossbeam 2, after energy-absorption box 3 and support 1 are located and are clamped in assembly frock, start energy-absorption box 3 and the contact-making surface of crossbeam 2 to weld, for ensureing the precision of welding, weld simultaneously at two ends, left and right, adopt A.C. welder, manual TIG welding manner welds, welding wire is ER5183, diameter is 2.0mm, tungsten electrode diameter is 5.0mm, end is hemispherical, protective gas is argon gas, purity is 99.99%, nozzle diameter is 13mm, nozzle height 14mm, argon gas flow velocity is 10L/min, welding current is 180A, speed of welding is 50cm/min, wire feed rate is 110cm/min, first four angles place left and right sides energy-absorption box 3 being contacted with crossbeam 2 adopts spot welding, further to fix energy-absorption box 3 positions, then carry out full weld in energy-absorption box 3 and crossbeam 2 contact positions, weld rear maintenance 15-20min cooling, then the alignment pin 7 of releases clamp 1 and support frock base plate 4, fastening bolt B12 and support frock base plate 4 tighten bolt A5 at lead 15, take out support frock base plate 4, unclamp the adjusting bolt C23 of column support 20 upperpush rods 17, take out depression bar 17, then take out the aluminum alloy bumper assembly having welded,
Weld rear removal welding slag, wipe clearly the aluminum alloy bumper assembly having welded with scrub-brush, then at 70 DEG C, in the potassium bichromate solution that concentration is 3%, embathe 8min, then use the hot water Washing of 40 DEG C, and check weldquality observes whether have field trash, bubble, defects i.e.cracks.
The welder that it uses: comprise support frock base plate 4, insert 10, the clamping screw 8 of inserting, on the compact heap 9 of inserting, assembly tooling base 14, column support 20, column support base 22, lead 15, on the plate of aforesaid support frock base plate 4, on four jiaos, there is upper lead hole 11, centre has three to be the support location notch hole 13 that Π shape is arranged, on the support frock base plate 4 of the support location notch hole 13 that described Π shape is arranged, there are two internal thread holes and dowel hole, on four jiaos of four fastening bolt A5 and support frock base plate 4, the outer end wall internal thread in lead hole 11 engages, it is characterized in that:
A, on support frock base plate 4, be placed with L-shaped energy-absorption box location-plate 6, there is the breach that is Π shape at the top panel middle part of energy-absorption box location-plate 6, alignment pin 7 is respectively through the dowel hole on energy-absorption box location-plate 6 and the dowel hole on support frock base plate 4, 10 upper surfaces of inserting are placed with the compact heap 9 of inserting, lower surface is placed with down the compact heap of inserting, insert compress leading screw 8 through the holes of the compact heap 9 of above inserting with under the insert hole internal thread of compact heap engage, two fastening bolt B12 engage with internal thread hole on support frock base plate 4 respectively, form energy-absorption box 3 and support 1 welding tooling device,
B, column support base 22 is placed respectively in assembly frock base plate 14 two ends, upper surface and centre, on column support base 22, be placed with two L shaped column supports 20, adjusting bolt A26 engages with column support base 22 mider hole internal threads through the level board slotted hole of column support 20, in the middle of column support 20, be placed with support bar 16, adjusting bolt B25 engages with support bar 16 end-face hole internal threads through the vertical plate slotted eye of column support 20, the support bar 16 that two middle column supports 20 fill has depression bar 17 above, adjusting bolt C23 engages with depression bar 17 end-face hole internal threads through middle column support 20 vertical plate slotted eyes, C shape anchorage clip 21 blocks assembly frock base plate 14 and column support base 22, fastening bolt D27 engages with hole internal thread on column support base 22 limits through C shape anchorage clip 21 upper branch arm plate holes, the both sides end face of assembly frock base plate 14 has respectively four protruding ear pieces 24, there is recessed semicircular arc ear piece 24 outer faces, be placed with lead mount pad 18 in the outer face of ear piece 24, lead mount pad 18 end faces have recessed semicircular arc, both form lower lead hole ear piece 24 and lead mount pad 18, fastening bolt C19 engages with ear piece 24 end-face hole internal threads through lead mount pad 18 end-face holes, lower lead hole is inserted in lead 15 lower ends, the upper lead hole 11 of aforementioned welding tooling device upset after-poppet frock base plate 4 is inserted in upper end.
The present invention, column support 20 has 3-6.
The present invention, support bar 16 has 3-6.
The present invention, C shape anchorage clip 21 has 6-12.
The present invention, the axial line of the axial line of the dowel hole axial line of support frock base plate 4, the dowel hole of energy-absorption box location-plate 6, the dowel hole of support 1 is on same axial line.
The present invention, two internal thread holes of support frock seat board 4 respectively with the axial line of two bolts hole of support 1 on the same line.
In the drawings, support 1, crossbeam 2 and energy-absorption box 3 are the welded parts that show in welding process.
The present invention, loosening fastening bolt A5, adjustable timberer fills base plate 4 at lead 15 upper-lower positions; Loosening adjusting bolt C23, i.e. adjustable depression bar 17 upper-lower positions; Loosening adjusting bolt B25, i.e. adjustable support bar 16 upper-lower positions; Loosening adjusting bolt A26, i.e. distance between adjustable two column supports 20; Loosening C shape anchorage clip 21, capable of regulating column support 20 is in the position of assembly tooling base 14.
Claims (7)
1. an aluminium alloys for automobile bumper assembly welding method, is characterized in that welding method step is as follows:
A, oil removing is cleaned: a kind of aluminium alloys for automobile bumper assembly is by crossbeam (2), energy-absorption box (3) and support (1) composition, respectively there are an energy-absorption box (3) and support (1) in wherein said crossbeam (2) two ends, left and right, need to weld respectively the contact-making surface between energy-absorption box (3) and crossbeam (2) and support (1), joint form is T junction, welding is front with wire brush or sand papering crossbeam (2), groove and the neighboring area of energy-absorption box (3) and support (1), put into and contain 93# gasoline solution through polishing, flood and oil removal treatment, subsequently with cleaning weldment in the NaOH solution container of 5%-10% concentration, solution temperature requires 40-60 DEG C, scavenging period is 1-3min, take out with mobile clear water flushing, last natural air drying,
B, welding a: support (1) is put to a support frock base plate (4), on support frock base plate (4), there are dowel hole and two bolts hole corresponding with the upper dowel hole of support (1) and two bolts hole, and position on support frock base plate (4), simultaneously three limits of support (1) and support frock base plate (4) centre are the limit positioned in alignment of ∏ shape line timber location notch hole (13), then energy-absorption box location-plate (6) is put to support frock base plate (4) and positioned, align with the each limit of support frock base plate (4) in the each limit of energy-absorption box location-plate (6), and upper energy-absorption box location-plate (6) dowel hole is alignd with the upper dowel hole of support (1), and by alignment pin (7) location, an energy-absorption box (3) is put into energy-absorption box location-plate (6) middle part ∏ v notch v, be matched in clearance between the two, for ensureing the perpendicularity between an energy-absorption box (3) and a support (1), in an energy-absorption box (3), insert insert (10) identical with interior hole size, insert between (10) and energy-absorption box (3) endoporus is matched in clearance, the compact heap (9) of inserting on (10) upper surface of inserting has, the compact heap of inserting under energy-absorption box (3) bottom face has, the clamping screw (8) of inserting through the hole of the clamp (9) of above inserting with under the clamp hole internal thread of inserting engage, complete location and fastening between energy-absorption box (3) and support (1), then take out energy-absorption box location-plate (6), adopt A.C. welder, manual TIG welding manner welds, welding wire is ER4043 or ER5183, diameter is 1.6-2.0mm, tungsten electrode diameter is 4.8-5.0mm, end is hemispherical, protective gas is argon gas, purity is 99.99%, nozzle diameter is 11-13mm, nozzle height 8.0-14mm, argon gas flow velocity is 7-10L/min, welding current is 151-200A, speed of welding is 30-60cm/min, wire feed rate is 108-117cm/min, four spot welding of position, four angles welding that contact with support (1) at energy-absorption box (3), to fix energy-absorption box (3), then energy-absorption box (3) four limits are adopted to above welding procedure, weld in full weld mode, adopt and weld in the same way another energy-absorption box (3) and another support (1), complete after the welding of energy-absorption box (3) and support (1), keep 15-20min, after it is cooling, shed, under insert compact heap and the clamping screw (8) of inserting,
Secondly, complete after the welding of a pair of energy-absorption box (3) and support (1), again two energy-absorption boxes (3) are welded with the both sides that crossbeam (2) contacts, crossbeam (2) is placed on the good column support (20) identical with crossbeam (2) radian of adjusted, the middle part of crossbeam (2) is placed between the depression bar (17) and support bar (16) of column support (20), two ends are placed on the support bar (16) of another two column supports (20), by adjusting the number of column support (20), the height of position and support bar (16) can be adjusted the radian that column support (20) supports, to reach the object that coordinates crossbeam (2) radian, by measuring the height of crossbeam (2) both sides, the crossbeam (2) of having good positioning, by depression bar (17), crossbeam (2) is above clamped at column support (20), column support (20) can clamp at crossbeam (2) width simultaneously, welding tooling device upset by two energy-absorption boxes (3) that welded with support (1), make energy-absorption box (3) down, by the upper lead hole (11) of support frock base plate (4), support frock base plate (4) is enclosed within the upper newel post of lead (15), the location of energy-absorption box (3) on crossbeam (2) by both sides on lead hole (11) location, by crossbeam (2), after energy-absorption box (3) and support (1) are located and are clamped in assembly frock, start energy-absorption box (3) and the contact-making surface of crossbeam (2) to weld, for ensureing the precision of welding, weld simultaneously at two ends, left and right, adopt A.C. welder, manual TIG welding manner welds, welding wire is ER4043 or ER5183, diameter is 1.6-2.0mm, tungsten electrode diameter is 4.8-5.0mm, end is hemispherical, protective gas is argon gas, purity is 99.99%, nozzle diameter is 11-13mm, nozzle height 8.0-14mm, argon gas flow velocity is 7-10L/min, welding current is 151-200A, speed of welding is 30-60cm/min, wire feed rate is 108-117cm/min, first four angles place left and right sides energy-absorption box (3) being contacted with crossbeam (2) adopts spot welding, further to fix energy-absorption box (3) position, then carry out full weld in energy-absorption box (3) and crossbeam (2) contact position, weld rear maintenance 15-20min, make the bumper assembly that welded cooling, then the alignment pin (7) of releases clamp (1) and support frock base plate (4), fastening bolt B(12) and support frock base plate (4) tighten bolt A(5 at lead (15)), take out support frock base plate (4), unclamp the adjusting bolt C(23 of column support (20) upperpush rod (17)), take out depression bar (17), then take out the aluminum alloy bumper assembly having welded,
C, postwelding cleaning: postwelding is removed welding slag, with the clear aluminum alloy bumper assembly welding of wiping of scrub-brush, again at 60-80 DEG C, concentration is to embathe 5-10min in the potassium bichromate solution of 2%-3%, then use the hot water Washing of 40 DEG C, and check weldquality observes whether have field trash, bubble, crackle, deformation defect.
2. the welder of a kind of aluminium alloys for automobile bumper assembly welding method according to claim 1, comprise support frock base plate (4), insert (10), the clamping screw (8) of inserting, on the compact heap (9) of inserting, assembly tooling base (14), column support (20), column support base (22), lead (15), on the plate of aforesaid support frock base plate (4), on four jiaos, there is upper lead hole (11), centre has three to be the support location notch hole (13) that Π shape is arranged, on the support frock base plate (4) of the support location notch hole (13) that described Π shape is arranged, there are two internal thread holes and dowel hole, four fastening bolt A(5) engage with the outer end wall internal thread in lead hole (11) on four jiaos of support frock base plate (4), it is characterized in that:
A, on support frock base plate (4), be placed with L-shaped energy-absorption box location-plate (6), there is the breach that is Π shape at the top panel middle part of energy-absorption box location-plate (6), alignment pin (7) is respectively through the dowel hole on energy-absorption box location-plate (6) and the dowel hole on support frock base plate (4), (10) upper surface of inserting is placed with the compact heap of inserting (9), lower surface is placed with down the compact heap of inserting, insert compress leading screw (8) through the hole of the compact heap (9) of above inserting with under the insert hole internal thread of compact heap engage, two fastening bolt B(12) engage with the upper internal thread hole of support frock base plate (4) respectively, form energy-absorption box (3) and support (1) welding tooling device,
B, column support base (22) is placed respectively in assembly frock base plate (14) two ends, upper surface and centre, on column support base (22), be placed with two L shaped column supports (20), adjusting bolt A(26) engage with column support base (22) mider hole internal thread through the level board slotted hole of column support (20), in the middle of column support (20), be placed with support bar (16), adjusting bolt B(25) engage with support bar (16) end-face hole internal thread through the vertical plate slotted eye of column support (20), the support bar (16) of middle two column supports (20) dress has depression bar (17) above, adjusting bolt C(23) engage with depression bar (17) end-face hole internal thread through middle column support (20) vertical plate slotted eye, C shape anchorage clip (21) blocks assembly frock base plate (14) and column support base (22), fastening bolt D(27) engage with hole internal thread on column support base (22) limit through C shape anchorage clip (21) upper branch arm plate hole, the both sides end face of assembly frock base plate (14) has respectively four protruding ear pieces (24), there is recessed semicircular arc ear piece (24) outer face, be placed with lead mount pad (18) in the outer face of ear piece (24), lead mount pad (18) end face has recessed semicircular arc, both form lower lead hole ear piece (24) and lead mount pad (18), fastening bolt C(19) engage with ear piece (24) end-face hole internal thread through lead mount pad (18) end-face hole, lower lead hole is inserted in lead (15) lower end, the upper lead hole (11) of aforementioned welding tooling device upset after-poppet frock base plate (4) is inserted in upper end.
3. the welder of a kind of aluminium alloys for automobile bumper assembly welding method according to claim 2, is characterized in that column support (20) has 3-6.
4. the welder of a kind of aluminium alloys for automobile bumper assembly welding method according to claim 2, is characterized in that support bar (16) has 3-6.
5. the welder of a kind of aluminium alloys for automobile bumper assembly welding method according to claim 2, is characterized in that C shape anchorage clip (21) has 6-12.
6. the welder of a kind of aluminium alloys for automobile bumper assembly welding method according to claim 2, is characterized in that the axial line of dowel hole of axial line, the support (1) of the dowel hole of dowel hole axial line, the energy-absorption box location-plate (6) of support frock base plate (4) is on same axial line.
7. the welder of a kind of aluminium alloys for automobile bumper assembly welding method according to claim 2, two internal thread holes that it is characterized in that support frock seat board (4) respectively with the axial line of two bolts hole of support (1) on the same line.
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| CN103273239B (en) * | 2013-05-17 | 2015-04-22 | 奇昊汽车***（苏州）有限公司 | Three-axle compensation positioning tool for welding bumper |
| CN105618902B (en) * | 2016-03-31 | 2018-06-05 | 深圳格兰达智能装备股份有限公司 | A kind of thin-wall aluminum alloy metal plate product automatic argon arc welding machine controlled |
| CN107288415A (en) * | 2017-06-19 | 2017-10-24 | 刘美妹 | A kind of Novel handle that there is sandwich construction and exempt from welding |
| CN110153624B (en) * | 2019-04-30 | 2024-06-11 | 重庆山朕科技发展有限公司 | Welding jig based on crossbeam assembly |
| CN110270778A (en) * | 2019-05-20 | 2019-09-24 | 上海科大重工集团有限公司 | Rubber conveyer supporting leg intelligent robot welding system |
| CN114682880A (en) * | 2020-12-26 | 2022-07-01 | 玛斯特轻量化科技(天津)有限公司 | Energy absorption box welding process method and system |
| CN112894131A (en) * | 2021-01-15 | 2021-06-04 | 滁州美杰精密部件制造有限公司 | Welding process for chassis assembly production |
| CN113458663A (en) * | 2021-06-07 | 2021-10-01 | 沈阳消应***工程有限公司 | Arrangement method of welded pipeline and welded plate |
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| JPH06328988A (en) * | 1993-03-23 | 1994-11-29 | Toupure Kk | Vehicle bumper beam |
| CN2778615Y (en) * | 2004-11-13 | 2006-05-10 | 长安汽车（集团）有限责任公司 | Vehicle front collision beam structure |
| US20110012381A1 (en) * | 2008-03-05 | 2011-01-20 | Nikkeikin Aluminum Core Technology Company Ltd. | Bumper structure |
| CN101474709B (en) * | 2009-01-15 | 2011-09-28 | 中国船舶重工集团公司第七二五研究所 | Aluminum and aluminum alloy handwork double-gun double-face TIG welding technique |
| DE202009003526U1 (en) * | 2009-03-13 | 2010-04-15 | Kirchhoff Automotive Deutschland Gmbh | Bumper made of metal |
| DE102009013322A1 (en) * | 2009-03-18 | 2010-09-30 | Benteler Automobiltechnik Gmbh | bumper assembly |
| CN201529883U (en) * | 2009-06-18 | 2010-07-21 | 重庆理工大学 | Special welding fixture for mini-car longitudinal beam |
| CN201702520U (en) * | 2010-04-29 | 2011-01-12 | 上海依赛工业有限公司 | Automatic welding machine |
| CN102366869B (en) * | 2011-09-29 | 2014-02-26 | 合肥常青机械股份有限公司 | Bumper welding fixture |
| CN102500881B (en) * | 2011-11-21 | 2014-01-08 | 北京新风机械厂 | Thin-wall aluminum alloy three-plate butting one-time fusion welding process method |
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