Automobile body covers a new plan of strike out form

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Automobile body covers a product area big, each place technology asks to differ, original detached figuration and integral figuration method exist have different drawback, and the application that laser spells solder board technology offerred new thinking for integral figuration. Spare parts of automobile body of the car in conventional technology has method of two kinds of figuration: Detached figuration and integral figuration. Detached figuration method is will large part is divided into small-sized and individual part figuration, solder next component, its advantage is OK select different capable person according to the requirement of each place the material of qualitative, different ply; Defect is the investment that needs more tool moulds and facility, production cost is higher, assembly solders in the meantime cooperate precision and truckload quality also drops somewhat. Integral figuration law is to use integral board to expect direct figuration is large spare parts. The investment that main good point is tool mould and equipment decreases greatly, production cost is relatively inferior, product quality got rising; Defect is to must be opposite all place use the part same capable person pledges and the material of identical ply, realize the need that the structure optimizes very well hard. Laser spells laser of solder board technology to spell solder board technology is the modern treatment engineering technology that is based on mature laser beam welding to receive technical development to rise, the laser that is an exorbitant energy differs a few capable person is qualitative, different ply, different the rolled steel of coating solders an integral board again punch production, in order to satisfy component different position is different to material the requirement of function. The occurrence that spells solder board craft solved what cannot satisfy by place of stuff of traditional and onefold ply to exceed wide board reach a part the craft problem that different position has different technical properties to ask. Graph the 1 sketch map that to part figuration, whole figuration and laser spell solder figuration to produce shell plating of car side wall. Graph the dominant position that method of figuration of shell plating of 1 car side wall compares laser to spell solder board uses laser to spell solder board to having huge advantage, can bring remarkable economic benefits to automobile manufacturing industry, basically reflect in: Make truckload spare parts amount decreases greatly, simplified to select solder technology, raised precision of automobile body dimension to reduce quality problem, the changeability of material ply made sure counterpoise wants positional aggrandizement to wait for a respect. The graph shows the example that for east wind coping of whole of medium-sized car cab uses laser to spell solder board to have production successfully 2 times, the graph is shown 3 times for the coping assembly sketch map that east wind solders after figuration of heavy-duty car depart. If parameter of current situation of two spare partses, craft and investment express place to show, the key in the watch contrasted heavy-duty car coping is used spell plan of figuration of solder board whole and the characteristic that distribute a punch program. Graph 2 medium-sized cars coping of whole of a half cab pursues assembly of top of around of car of mark of 3 heavy-duty cars can see from inside next watches punch of whole spelling solder compares divided a punch to obtain obvious economic benefits: Mould investment reduces 3.6 million yuan by 4.9 million former yuan; Reduced equipment to take up area and operation personnel amount; Because spare parts weight builds those who accept a scale to decrease and reduced 0.

55kg, overall material utilization factor was achieved 76 relatively highest.

8% , material is used up decreased 5.

33kg/ . Watch coping spells solder whole punch and the advantage contrast that divide a punch the technical issue that the sex of craft of strike out form that laser spells solder board spells solder board to use, the mainest is the tool that the figuration function that causes by place of change of organization of welding line area drops and the element such as welding line shift causes production difficult problem. 1.

The function of strike out form that spells solder board makes clear to spelling the research of function of solder board figuration: (1) after laser beam welding is received solder contact place intensity compares what mother ability part has fixed rate to rise, the change of ply rate changes without rate of grade of material to the influence of intensity the impact is big, do not solder with what wait for course material contact intensity basically depends on the material of low intensity grade. (2) solder function of contact place figuration compares what mother capable person has fixed rate to reduce, along with the addition of difference of ply spelling solder and strength diversity, figuration function is reduced. (3) thick to differring spell solder board, when drawing direction and welding line way are same, spell solder board plasticity to be out of shape ability is reduced apparently, thin side proportion is smaller are reduced more. (4) the drawing that spells solder board destroys means to have two kinds commonly: It is when agreeing with drawing direction when welding line, because the plasticity of welding line is lower than mother capable person, welding line place often is pulled; 2 it is to become when welding line and drawing direction are perpendicular, capable person of thin side mother produces excessive easily to decrease thin and rip. In addition, spell solder board to want to pay close attention to its figuration function not only in be used actually, the makings large difference that differs considering its even is right the influence of follow-up working procedure, if expect large difference is bigger or the solder suture with function bigger difference should avoid to cross alveolus punch position (easy bring about alveolus to fold a turn or rupture) etc. 2.

The welding line shift that spells solder board and shift of welding line of its craft countermeasure are to spell solder board to distinguish at common whole board prime factor of production, also be products plan and craft analysis is essential. Delay craft theory and relevant experimental argumentation to be able to reach according to pulling the following conclusion: Direction of welding line shift and mobile distance basically depend on welding line position of intensity comparing, welding line and drawing press two side material edge force distributings etc. As a result of welding line mobile quantity can be reduced only and indelible, this differs in welding line place with respect to need thick sky of makings of the set inside certain limits drives side of large model side face. Leave for nothing face sky of makings thin a side to leave, press sky of makings area area to leave corresponding bigger, part of correspondence of sunken model punch is corresponding and minor. Use clamp device to be able to improve rate of welding line shift apparently, make welding line mobile the quantity decreases 72.

6% ～ 84.

9% . Actual automobile body enclothes a design in, also can be below the condition with product probable structure, standing by welding line place to design the structure such as reasonable reinforcement, have a structure through the model first the shift that place of figuration welding line dominates welding line thereby. Except adopt necessary craft to measure is controlled and reduce welding line besides shift, still should move in welding line the area uses alloy to set to mould structure piece those who wait for measure control face wear away and pull hair. 3.

The CAE with mobile welding line analyses the development as computer technology, can have used CAE method mobile to spelling the welding line of solder board rule undertakes more accurate analysis, this provided rational basis for products plan, the rationalize that also is workmanship laid solid foundation. Graph 4 for medium-sized car side wall inside board the CAE of production spelling solder analyses a result, mobile quantity and whole draw the its clear welding line that reflected each position delay a state to wait. Graph 4 spell CAE of punch of solder board whole to analyse a result inside medium-sized car side wall board those who spell solder position is affirmatory reach its to pursue to the influence of cost 5 for sketch map of side wall of medium-sized truck cab, part by makings is thick 0.

The side wall of 75mm horny board and makings are thick 1.

Inside the side wall of 6mm board composition, boundary delays a curve for the turn of graphic representation. First craft parts for two spare partses figuration solders again whole. If the graph is shown 6 times,by this plan corresponding punch platoon appearance and material use the effect. The weakness that can see this plan is overall material utilization factor extremely low, it is respectively 36.

2% with 43.

9% , sex of technology of spare parts production is poorer also at the same time. Concern considering two assembly, if preliminary judgement uses means spelling solder to produce will significant improvement product craft sex and reduce cost. Graph side wall of cab of 5 medium-sized trucks pursues a manufacturing platoon appearance and 6 minutes of material use the effect 1.

The chooses laser to spell solder product design intent of welding line position whether get best implementation through craft, its crucial link chooses to whether succeed with respect to the position that consists welding line spelling solder. The set of welding line position should consider the need of product function and structure not only, consider integratedly from the respect such as the requirement of punch craft sex, requirement of cost even, 3 person organic union just can get best design construction is mixed truckload quality. The basis draws the demand such as the research gain that extends theory and technology of figuration spelling solder, can get choosing the basic principle of welding line position below: (1) the requirement that the choice of welding line wants to satisfy product structure and function above all. (2) welding line is linear, and after had better assuring to discharge appearance in the craft that finish, for square board makings spells solder. (3) welding line should avoid to pass through generation is pulled delay the area with very large effect, should prevent welding line parallel to pass through particularly figuration R area. (4) because different makings rushs thickly,check clearance difference, should avoid welding line to pass through as far as possible alveolus is strong reduce the position. The side wall that to in an attempt to shows 5 times is exemple, the product designs a structure to be bent broken line at first. At present place cannot satisfy technology spelling solder be welding line with this curve, the shift that because draw delay time welding line,at the same time this curve meets in place of graphic representation A/B causes alveolus to be in a likelihood to appear 0.

75mm, 1.

6mm expects two kinds thick, this brings about alveolus drift easily bend or break off, consequently need chooses welding line place afresh. According to principle of welding line set (1) and (2) if the welding line position of requirement first selection pursues place of 5 red wide lines is shown. The main drawback of this welding line expects in Xiang Hou of the welding line when Yu Layan shift still can make A aperture appears different makings is thick, as a result of A at the same time package is in protruding rises and fall figure is greater, the likelihood appears pull delay craze. Union pursues 5 in the positional relation of two aperture of A, C will spell solder line to adjust to the graph 7 show the position, satisfied basically relevant each requirement. Graph the welding line position of 7 main contented and relevant demands 2.

Cost factor is shown 8 times to the influence graph of welding line position for east wind some model side wall, the line spelling solder of predesign stage is shown like red line place. Severe reopen cracks the along the line of welding line of CAE analysis eventuate that is aimed at this plan (graph 9) . Its are main the reason is approaching R part at place of graphic representation A, be out of shape acuteness. Graph side wall of 8 some models and its spell solder line to pursue the 9 modelling characteristics that result of CAE of welding line position decides to consider this first, if the solder suture of sex of completely contented craft pursues place of 8 blue lines is shown, CAE result is favorable. Comparative figure the two solder suture of 8 can see, the plan of sex of completely contented craft 1.

Area of 6mm thick makings is increased apparently, consequently spare parts weight is increased, material is used up also increase apparently, so this plan also is not first-rate result. Whether does analogy pursue does the means of 7 press a plan do 10 set spell solder cotton suiting? If be carried out according to this plan, accord with utmost the product to ask and reduce thick makings extent greatly, reduce product cost thereby. Craft analyses a scheme the risk with 10 the biggest program is step and oblique plane area craze of area of likelihood occurrence welding line (CAE is analysed also confirm this one result) , need does corresponding design to change to this area. Products plan branch did oblique plane to change to relevant section according to the analysis alleviation transfers processing, the graph is shown 11 times to product, craft, cost is satisfied after course product is optimized the CAE of all elements analyses a result. Graph the line spelling solder of 10 analogy set pursues result epilogue laser spells the 11 CAE that craft and cost satisfy after optimizing products plan solder board regards a kind of new technology as the method, make to automobile body bring new product solution, rise to be reduced with cost to quality brought new opportunity. The characteristic that as a result of its at the same time craft carries out, craft of need products plan, punch and mould are made wait for relevant personnel more close cooperate, ability is made finally go out to satisfy structure and performance demand, craft already the eligible product of lowest of reasonable stability, cost. CNC Milling CNC Machining