CN116214031A - Welding method for blade type power battery tray cross beam - Google Patents
Welding method for blade type power battery tray cross beam Download PDFInfo
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- CN116214031A CN116214031A CN202211704349.4A CN202211704349A CN116214031A CN 116214031 A CN116214031 A CN 116214031A CN 202211704349 A CN202211704349 A CN 202211704349A CN 116214031 A CN116214031 A CN 116214031A
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- cross beam
- tray
- battery tray
- welding
- frame
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- 238000003466 welding Methods 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000003825 pressing Methods 0.000 claims description 45
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000005452 bending Methods 0.000 claims description 9
- 210000000078 claw Anatomy 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 239000000306 component Substances 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 230000009471 action Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910001094 6061 aluminium alloy Inorganic materials 0.000 description 1
- 244000188472 Ilex paraguariensis Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012257 pre-denaturation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Classifications
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
A welding method for a cross beam of a blade type power battery tray, wherein the periphery of a bottom plate of the battery tray is provided with a frame, the cross beam is required to be welded on the central line of the battery tray, and two ends of the cross beam are tightly propped against the inner sides of the left frame and the right frame and are welded and fixed, and the welding method is characterized in that: after the side frames on two sides are stretched outwards, the cross beam is pressed down simultaneously, the bottom plate of the battery tray and the side frames are deformed reversely, and then the cross beam and the battery tray are welded and fixed. According to the utility model, the left and right frames of the battery tray are stretched outwards, and the cross beam is pressed down to enable the battery tray to be deformed reversely and welded. The principle is that before the welding of the cross beam, the battery tray is stretched, the cross beam is positioned and put in, the concave welding anti-deformation stress is given to the battery tray, after the welding of the cross beam is carried out, the stress after deformation just can offset the anti-deformation stress, and therefore the final battery tray product can meet the product flatness index requirement.
Description
Technical Field
The utility model relates to the technical field of processing of new energy automobile parts, in particular to a welding method for a blade type power battery tray beam.
Background
In recent years, new energy electric vehicles gradually replace fuel automobiles, and become an increasingly growing automobile type. The power battery in an electric vehicle is a storage component of its electric energy, which is a core component in the whole vehicle. The power battery module is borne by a battery pack shell, and the battery pack shell is connected with a vehicle chassis to form a firm bearing vehicle body. Because the new energy electric vehicle is closely related to the endurance mileage, based on the light weight of the vehicle body, the aluminum vehicle body structure has excellent comprehensive indexes such as light weight, corrosion resistance and recovery residual value, and becomes a choice for more and more new energy vehicles, and the battery pack shell and the battery tray thereof are taken as important structural components, occupy 20-30% of the weight of the battery system, are also core energy sources of the new energy vehicles, and play a key role in the safety and protection of battery modules. The lithium battery is generally arranged at the lower part of the vehicle body and is mainly used for protecting the lithium battery from being damaged when the lithium battery is impacted and extruded from the outside.
Because the traditional battery pack module still needs the connection of pencil, consequently frame tray bottom plate designs into the section bar, and the centre is horizontal or vertical additional strengthening in addition, and the mutual overlap joint of vertical and horizontal roof beam is welded fully, and overall structure rigidity is relatively good, non-deformable, and manufacturing is easy control. But the longitudinal and transverse structural members occupy valuable internal space of the battery pack. In recent years, a blade type lithium iron phosphate power battery is provided, the blade battery does not need a module, a battery pack can be directly formed by an electric core, and the battery pack has more excellent self structural strength, so that a transverse longitudinal beam in the battery pack is omitted, and the overall space utilization rate is improved. The space utilization of the conventional battery is about 40%, while the battery pack space utilization of the blade battery can be improved to 60%. The battery package lower casing (battery tray) that blade battery matees is area Liang Lv sheet metal casing, compares with traditional battery module frame-type tray, and blade battery tray bottom plate adopts 1.5 mm's sheet metal, and the intermediate reinforcing structure of single crossbeam has been set up, has increaseed the degree of difficulty of battery tray manufacturing, has put forward higher requirement to manufacturing, especially needs tight seam to put into single crossbeam part to battery tray frame middle part, then crossbeam both ends top tight frame middle part inboard and firm welding, and its difficult point lies in: (1) The beam welding procedure is carried out after the welding of thin bottom plate, in the welding process of carrying out battery tray crossbeam, the deformation after the welding is particularly difficult to control, the crossbeam is aluminium square tube section bar, if directly paste crossbeam and both sides limit back junction full weld, because crossbeam welding is heated and is taken place the shrink, under the stress effect of crossbeam, the middle part can be protruding, cause whole battery tray shape bending unevenness after the cooling, the tray bottom plate planarization can't satisfy product technical index requirement, cause the rejection rate high, even need further plastic, influence the production delivery schedule. (2) The two ends of the cross beam are required to prop against the inner side surface of the tray frame, so that gaps are prevented from being generated after welding, and the air tightness of the battery tray cannot meet the requirement; however, the precision tolerance of sawing and blanking of the beam profile is limited, zero-error precision sawing cannot be completely achieved, if the length of the beam is slightly shorter than the inner width of the tray frame, risk defects of welding seams can occur, and if the length of the beam is slightly longer than the inner width of the tray frame, the beam is difficult to be embedded into the inner frame for welding.
Search keywords: welding reverse deformation, battery tray, pre-denaturation, pre-bending, press bending,
1. A welding reverse deformation tool; CN201821566300.6; a welding reverse deformation tool belongs to the technical field of reverse deformation devices. The welding reverse deformation tooling comprises a base, supporting legs, a bearing cross beam, a first supporting cylinder, a first hinging seat, a second hinging seat and a tensioning device. The base is connected with the landing leg, and the one end that the landing leg was kept away from the base is connected with the bearing crossbeam. The tensioning device is used for tensioning the workpiece and is connected with the base. The base is connected with the first articulated seat, and first articulated seat is connected with first supporting cylinder, and the one end that first supporting cylinder kept away from first articulated seat is articulated with the articulated seat of second. The welding reverse deformation tooling can turn over through the hinge structure and the supporting cylinder, so that the workpiece can be turned over, the welding seam of the workpiece can be welded from a overlook angle conveniently, the working efficiency of the workpiece in turning over is improved, the labor cost and the labor intensity are reduced, and the welding reverse deformation tooling is reasonable in structural design and high in practicability.
2. A welding reverse deformation tool; CN202023129419.7; the welding anti-deformation tooling comprises a workbench and two welding anti-deformation assemblies which are oppositely arranged on the workbench; the welding anti-deformation assembly comprises a supporting component, a limiting component and an adjusting component; the support assembly comprises a support piece and a lower clamping plate; the first end of the supporting piece is hinged on the workbench; the lower clamping plate is arranged on the second end of the supporting piece and is contacted with the piece to be welded; the limiting assembly comprises a fixed frame, a first telescopic piece and an upper clamping plate; the fixing frame is arranged on the workbench; the first telescopic piece is arranged on the fixing frame; the upper clamping plate is arranged on the telescopic end of the first telescopic piece; the adjusting component comprises a second telescopic piece; the second telescopic piece is arranged on the workbench, and the telescopic end of the second telescopic piece is connected with the supporting piece. The upper clamping plate and the lower clamping plate are matched to limit a piece to be welded, so that stable processing is ensured; the support piece rotates, so that the adjustment of the reverse deformation angle is realized, and the welding and splicing operations of different types are convenient.
3. A beam main body welding reverse deformation device for a front crane and a use method thereof; cn202010793559.X; a beam main body welding reverse deformation device for a front crane, belonging to the technical field of port machinery; the device comprises a support frame, a support bottom plate, a first compression positioning device, a second compression positioning device and a longitudinal compression positioning device, wherein the second compression positioning device and the longitudinal compression positioning device are detachably connected with the support bottom plate; the utility model aims to overcome the defects in the prior art, and provides a welding reverse deformation device for a cross beam main body for a front crane and a use method thereof, which can rapidly and conveniently lock and fix the cross beam main body for the front crane, effectively control welding deformation, improve welding efficiency, ensure dimensional accuracy and improve product quality.
4. Welding an anti-deformation tool for a crane boom cover plate; CN201520116642.8; the welding anti-deformation tooling for the boom cover plate of the crane comprises a plurality of fixed bases which are sequentially arranged according to fixed intervals, wherein each fixed base is formed by combining a connecting rod and base brackets welded below two ends of the connecting rod; one end above the connecting rod is fixedly provided with a fixed backer, the other end is provided with a movable backer parallel to the fixed backer, and the moving direction is close to or far away from the fixed backer along the direction of the connecting rod. The straight edge bending device has the characteristics of simple structure, practicality, convenience and convenience in operation, can perform reverse deformation operation on the straight edge of the longer arm extending cover plate at one time, does not influence the straightness of the straight edge of the cover plate, cannot cause wavy bending, can perform reverse deformation operation on the arm extending cover plates with different specifications, has universality, and is very suitable for welding reverse deformation operation of the arm extending cover plates.
5. A tool for welding and inversely deforming a steel plate; CN201620099179.5; the utility model provides a frock of steel sheet welding reverse deformation, includes shaped steel welding platform, shaped steel welding platform bottom is articulated with the base, shaped steel welding platform upper portion is equipped with a plurality of reverse deformation plate groups, the base lateral part is equipped with the supporting seat, and the side part installation of base is connected with shaped steel welding platform and supporting seat respectively and realizes the turning device of shaped steel welding platform upset; the upper surface of the reverse deformation plate group is arc-shaped. The tool is simple and easy to manufacture: the device has simple structure and is easy to manufacture, assemble and debug. The operation is simple and the efficiency is high: the device is designed into a platform shape, can be flexibly used, and can greatly reduce the working strength of workers. The structure is adjustable, and the disassembly and the assembly are good: in the face of steel plates with different widths, materials and thicknesses, the requirements can be met through simple mechanical adjustment.
6. An improved bridge unit welding reverse deformation device and a use method thereof; CN201810091980.9; an improved bridge unit welding reverse deformation device and a use method thereof comprise a reverse deformation jig frame, wherein a plurality of transverse partition plates which are arranged in parallel are transversely distributed on the reverse deformation jig frame, one end of each transverse partition plate is provided with a reverse pressing device, the other end of each transverse partition plate is provided with a reverse supporting point, a plurality of forward supporting points are uniformly distributed on the transverse partition plates along the length direction, and the forward supporting points are arranged between the reverse pressing devices and the reverse supporting points. The defect that the traditional reverse deformation device is used for reverse deformation of the two lateral sides of the single element is overcome greatly, and meanwhile, the reverse deformation control is effectively carried out on the longitudinal direction of the single element, so that the workload of post correction of the single element is reduced, the production cost is reduced, and the production efficiency is improved.
7. A long weld joint welding anti-deformation device and a welding method for a web plate of a flat-bulb steel side beam; CN202011108066.4; the utility model provides a flat-bulb steel curb girder web long weld seam welding anti-deformation device and welding method, the device includes: the main body box beam is of a square tube structure, the bottom plate is welded at the bottom of the main body box beam, the angle iron is welded on the side face of the main body box beam and is positioned at the upper part of the main body box beam, the rib plates are welded on the main body box beam and the angle iron, a plurality of stand columns are welded on the main body box beam, and the stand columns are welded with the support plates near the top; the cover plates are welded at two ends of the main body box girder. The welding method comprises the following steps: clamping angle irons on the upper end heads of the flat-bulb steel side beams; the supporting rod is jacked at the supporting plate to be tightly propped; adjusting the jack to enable the upper edge of the side beam to be deformed outwards integrally; measuring the distance between the side beams and adjusting the jacking degree of the jack; welding the floor and the side beam in a welding line under the stress state; and (5) unloading the anti-deformation device after welding. The utility model has simple structure and easy realization; the operation is simple, safe and reliable.
8. The stainless steel plate unit is welded with an anti-deformation device; CN202122933225.0; the utility model provides a corrosion resistant plate unit welding reverse deformation device, includes reverse deformation template, sets up in the subassembly that pushes down of reverse deformation template both sides, reverse deformation template upper surface is the cambered surface of upwards arching, push down the subassembly and be used for pushing down the corrosion resistant plate of placing on reverse deformation template for the corrosion resistant plate is conformed to and is pasted in reverse deformation template's upper surface formation reverse deformation. The anti-deformation device can counteract the welding deformation of the stainless steel plate, the surface of the stainless steel plate unit is smooth, no welding deformation exists, mechanical correction is not needed after the welding is finished, the surface of the stainless steel is effectively protected from being damaged by the mechanical correction, and meanwhile, the welding quality is improved.
In the prior art, a welding anti-deformation device or tool applied to a battery tray does not exist, and particularly, the battery tray and a cross beam thereof have special structures and operation steps, and special tools are needed for welding anti-deformation.
Disclosure of Invention
The utility model aims to provide a welding method for a cross beam of a blade type power battery tray, which is characterized in that left and right frames of the battery tray are stretched outwards, and the cross beam is embedded in a downward manner and is deformed reversely and welded. The principle is that before the welding of the cross beam, the battery tray is stretched, the cross beam is positioned and put in, the concave welding anti-deformation stress is given to the battery tray, after the welding of the cross beam is carried out, the stress after deformation just can offset the anti-deformation stress, and therefore the final battery tray product can meet the product flatness index requirement.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the utility model provides a blade formula power battery tray crossbeam welding method, the bottom plate of battery tray is the frame all around, and the crossbeam needs to be welded on battery tray central line to both ends top is tight about the frame medial surface and with frame up end welded fastening, its characterized in that: after the side frames on two sides are stretched outwards, the cross beam is pressed down simultaneously, the bottom plate of the battery tray and the side frames are deformed reversely, and then the cross beam and the battery tray are welded and fixed.
The welding method of the blade type power battery tray cross beam further comprises the following steps:
A. the roller in the welding tool is lifted in place by a roller cylinder;
B. pushing the battery tray into a rack tool by an operator through a roller, and positioning and fixing the tray through a positioning clamp and a positioning pushing device;
C. the roller descends and is supported by the side cushion block to prop up the tray;
D. loading the cross beam on the lower pressing beam, and clamping the cross beam by using a cross beam clamping mechanism, wherein the movable cushion blocks are moved inwards to two sides below the cross beam;
E. the tensioning claw descends, claw parts at two sides hook the tray frame, and the tensioning hydraulic cylinder acts to enable the tray frame to be unfolded;
F. the lower pressing beam is pressed down to the movable cushion block with the cross beam descending and clinging to the tray frame, and the cross beam is tightly pressed against the lower pressing beam;
G. the hydraulic cylinder is tensioned to loosen the tray, the lower pressing beam rises by 5-10mm, the movable cushion block moves outwards and moves horizontally and withdraws, and the positioning pushing device and the positioning clamp are loosened;
H. the lower pressing beam is pressed down again until the battery tray is in a lower pressing bending state, and the bottom of the tray is propped against the position of the central cushion block;
I. the cross beam is welded with the tray, and a handle and a positioning block fitting of the front frame of the tray are welded;
J. after welding is finished, loosening the beam clamping mechanism and lifting the lower pressing beam to the highest position;
K. the lifting roller supports the battery tray and moves the tray out.
The length of the cross beam is matched with the inner side distance of the frame, and the tolerance is 0 to +7mm. The cross beam with the positive tolerance length is adopted, after the left frame and the right frame are loosened and tensioned, the two ends of the cross beam are tightly propped, so that no gap exists between the cross beam and the left frame and the right frame, and the air tightness of the battery tray is improved.
The beam is pressed down Chi Tuopan to a down-pressure height= (battery tray length-1000)/100.
The welding fixture for the cross beam of the blade type power battery tray is characterized in that a portal frame is arranged at the middle line of the upper part of a frame, two sides above the portal frame are provided with a pressing hydraulic cylinder, a piston rod of the pressing hydraulic cylinder is downwards connected with a pressing beam, and a cross beam clamping mechanism is arranged on the pressing beam; a plurality of rollers are arranged on two sides of a gantry frame on the frame, and can be lifted up and down through roller cylinders fixed on a beam of the frame; the gantry frame is provided with a plurality of cushion blocks.
The roller has the functions that: the battery tray is conveniently entered from one end of the frame and is sent to a preset position; the lifting and the lowering of the cylinder of the roller enable the battery tray to be switched between the roller support and the cushion block support; the pressing hydraulic cylinder drives the beam clamping mechanism to ascend and descend.
Tensioning clamping claws are respectively hinged to sliding supports on two sides of the portal frame, and the middle parts of the tensioning clamping claws are hinged to piston rods of clamping cylinders hinged to the portal frame; the sliding support is connected with a piston rod of the tensioning hydraulic cylinder.
The tensioning hydraulic cylinder can realize the horizontal stretching action of the tensioning claw through the sliding support, and the clamping cylinder can realize the opening and closing actions of tensioning clamping rotation.
The beam clamping mechanism comprises a rotary clamping cylinder, a piston rod of the rotary clamping cylinder penetrates through the other side of the lower pressing beam and is connected with the beam clamping head. The rotary clamping cylinder is also called a rotary clamping cylinder, and the piston rod of the rotary clamping cylinder can also realize 90-degree rotation in the telescopic process, so that the beam chuck can also realize 90-degree rotation.
And a pressing spring is arranged at the end part of a piston rod of the pressing hydraulic cylinder and is connected with the pressing beam. The function of the pressing spring is that: the rigid downward pressure of the downward pressure hydraulic cylinder is prevented from being directly transmitted to the battery tray, and the situation that the downward pressure is not in place or excessive is caused if the downward pressure amount is controlled inaccurately is avoided.
And the two ends of the lower pressing beam are provided with buffer pressing heads, and the end parts of the buffer pressing heads can be in plane contact with the upper surface of the frame of the battery tray. The buffer pressure head has the functions that: in the process of pressing down the hydraulic cylinder, the buffer spring plays a role in unloading force and buffering, and the cross beam and the battery tray are prevented from being deformed by the instant impact load of the pressing down hydraulic cylinder.
The cushion blocks are divided into side cushion blocks, a center cushion block and movable cushion blocks, the center cushion block is fixed at the center of the frame, the movable cushion blocks are hinged to the frame, the movable cushion blocks are arranged on two sides below the portal frame and can slide horizontally inside and outside, and the movable cushion blocks are driven by cushion block cylinders. When the battery tray is horizontally placed, the side cushion blocks play a role in supporting the battery tray, and when the pressing beam is pressed down for the first time, the movable cushion blocks play a role in supporting the battery tray; when the pressing beam is pressed down in place for the second time, the center cushion block plays a role in supporting the battery tray.
And a plurality of locating clamps are arranged on two sides of the frame to clamp the frame of the battery tray. The locating clamp is used for fixing the position of the battery tray so as to prevent the battery tray from being displaced in the process of embedding the cross beam, and the welding position of the final cross beam is deviated.
The tail end of the frame is provided with a transverse positioning pushing device and a longitudinal positioning pushing device. The positioning and ejecting device can be used for ejecting and positioning after the battery tray is pushed into the rack each time, so that the position accuracy of the battery tray is ensured.
The utility model has the advantages that:
1. the utility model is applied to the welding of the middle cross beam of the all-aluminum blade type battery tray, and two operation actions are required to be realized simultaneously: when the battery tray is pulled and supported to be embedded into the cross beam and clamped at the center line of the battery tray, the cross beam is pressed down to enable the battery tray to be welded and inversely deformed, after the cross beam is welded, the stress after deformation can just offset the stress after the deformation, and therefore the final battery tray product can meet the product flatness index requirement.
2. The tooling equipment has high automation degree, and can complete a series of action steps of stretching the frame of the battery tray, twice lowering and compacting the cross beam, bending and supporting the battery tray and the like on one piece of equipment; the whole equipment mechanism is reasonable in operation, and the production action beats are compact and high in efficiency; the operation is convenient, and operating personnel only need simple training can be on duty, and the maintenance is convenient.
3. The utility model has accurate positioning and reasonable control of the downward pressure, and can not generate the phenomenon of crushing and damaging the cross beam or the battery tray, thereby greatly reducing the rejection rate.
4. The utility model can be expanded to the welding production of the cross beams of other types of blade type power battery trays, and is suitable for the welding production of the cross beams of battery trays with different sizes.
Description of the drawings:
FIG. 1 is a schematic view of the appearance structure of the present utility model;
FIG. 2 is an enlarged view of the structure at I in FIG. 1;
FIG. 3 is an enlarged view of the structure at II in FIG. 1;
FIG. 4 is an enlarged block diagram of the portion III in FIG. 1;
FIG. 5 is a schematic diagram of the front view direction structure of the present utility model;
FIG. 6 is a schematic diagram illustrating the structure of FIG. 5A in a side view;
FIG. 7 is a schematic diagram showing the structure of FIG. 5B in a side view;
FIG. 8 is a schematic top view of the present utility model;
FIG. 9 is a schematic view of the appearance of a battery tray;
the serial numbers and part names in the figures are: 1-a frame; 11-positioning clips; 12-positioning a pushing device; 2-portal frames; 21-pushing down the hydraulic cylinder; 3-pressing down the beam; 31-a rotary clamping cylinder; 32-a beam chuck; 33-pressing down the spring; 34-buffer ram; 41-tensioning hydraulic cylinders; 42-clamping a cylinder; 43-tensioning clamping jaws; 51-a roller; 52-side cushion blocks; 53-cushion block cylinder; 54-roller cylinder; 55-center pad; 56-a movable cushion block; 6-a cross beam.
Detailed Description
Example 1
A welding method for a cross beam of a blade type power battery tray, wherein the periphery of a bottom plate of the battery tray is provided with a frame, the cross beam is required to be welded on the central line of the battery tray, and two ends of the cross beam are tightly propped against the inner sides of the left frame and the right frame and are welded and fixed, and the welding method is characterized in that: after the side frames on two sides are stretched outwards, the cross beam is pressed down simultaneously, the bottom plate of the battery tray and the side frames are deformed reversely, and then the cross beam and the battery tray are welded and fixed.
The welding method of the blade type power battery tray cross beam further comprises the following steps:
A. the roller in the welding tool is lifted in place by a roller cylinder;
B. pushing the battery tray into a rack tool by an operator through a roller, and positioning and fixing the tray through a positioning clamp and a positioning pushing device;
C. the roller descends and is supported by the side cushion block to prop up the tray;
D. loading the cross beam on the lower pressing beam, and clamping the cross beam by using a cross beam clamping mechanism, wherein the movable cushion blocks are moved inwards to two sides below the cross beam;
E. the tensioning claw descends, claw parts at two sides hook the tray frame, and the tensioning hydraulic cylinder acts to enable the tray frame to be unfolded;
F. the lower pressing beam is pressed down to the movable cushion block with the cross beam descending and clinging to the tray frame, and the cross beam is tightly pressed against the lower pressing beam;
G. the hydraulic cylinder is tensioned to loosen the tray, the lower pressing beam rises by 5-10mm, the movable cushion block moves outwards and moves horizontally and withdraws, and the positioning pushing device and the positioning clamp are loosened;
H. the lower pressing beam is pressed down again until the battery tray is in a lower pressing bending state, and the bottom of the tray is propped against the position of the central cushion block;
I. the cross beam is welded with the tray, and a handle and a positioning block fitting of the front frame of the tray are welded;
J. after welding is finished, loosening the beam clamping mechanism and lifting the lower pressing beam to the highest position;
K. the lifting roller supports the battery tray and moves the tray out.
The length of the cross beam is matched with the inner side distance of the frame, and the tolerance is 0 to +7mm.
The beam is pressed down Chi Tuopan to a down-pressure height= (battery tray length-1000)/100.
Application examples:
the power blade battery tray is welded by adopting a 6061 aluminum alloy tray and a beam, the size of the aluminum alloy tray is 1210 x 1777.6mm, the flatness of the tray after the bottom plate sheet is welded is-4/+0 mm, then the tray is subjected to pre-deformation welding, the pre-deformation pressing amount is 73mm, and the flatness of the aluminum alloy tray after the beam is welded is 1-2mm. Meets the index requirement that the deformation of the product is less than or equal to 4 mm.
Under the same condition, the same power blade battery tray does not adopt downward pressing and reverse deformation to weld the cross beam, and the concave (upward convex) size of the aluminum alloy tray after welding the cross beam is 6-8mm.
Therefore, the utility model obviously improves the flatness of the battery tray after the power blade battery tray beam is welded.
And (3) carrying out welding pressing quantity statistics test on cross beams of battery trays with different lengths:
the welding method and working condition environment are the same as those of the embodiment 1 and the application embodiment, and the 6061 alloy aluminum alloy tray and the cross beam are adopted for welding, and the width dimension of the aluminum alloy tray is 1210cm;
as can be seen from the above, the depression height of the beam depression force Chi Tuopan = (battery tray length-1000)/100, this formula is generic under the above-described conditions.
Claims (4)
1. A welding method for a cross beam of a blade type power battery tray, wherein the periphery of a bottom plate of the battery tray is provided with a frame, the cross beam is required to be welded on the central line of the battery tray, and two ends of the cross beam are tightly propped against the inner sides of the left frame and the right frame and are welded and fixed, and the welding method is characterized in that: after the side frames on two sides are stretched outwards, the cross beam is pressed down simultaneously, the bottom plate of the battery tray and the side frames are deformed reversely, and then the cross beam and the battery tray are welded and fixed.
2. The blade power cell tray beam welding method according to claim 1, wherein: the method also comprises the following steps:
A. the roller in the welding tool is lifted in place by a roller cylinder;
B. pushing the battery tray into a rack tool by an operator through a roller, and positioning and fixing the tray through a positioning clamp and a positioning pushing device;
C. the roller descends and is supported by the side cushion block to prop up the tray;
D. loading the cross beam on the lower pressing beam, and clamping the cross beam by using a cross beam clamping mechanism, wherein the movable cushion blocks are moved inwards to two sides below the cross beam;
E. the tensioning claw descends, claw parts at two sides hook the tray frame, and the tensioning hydraulic cylinder acts to enable the tray frame to be unfolded;
F. the lower pressing beam is pressed down to the movable cushion block with the cross beam descending and clinging to the tray frame, and the cross beam is tightly pressed against the lower pressing beam;
G. the hydraulic cylinder is tensioned to loosen the tray, the lower pressing beam rises by 5-10mm, the movable cushion block moves outwards and moves horizontally and withdraws, and the positioning pushing device and the positioning clamp are loosened;
H. the lower pressing beam is pressed down again until the battery tray is in a lower pressing bending state, and the bottom of the tray is propped against the position of the central cushion block;
I. the cross beam is welded with the tray, and a handle and a positioning block fitting of the front frame of the tray are welded;
J. after welding is finished, loosening the beam clamping mechanism and lifting the lower pressing beam to the highest position;
K. the lifting roller supports the battery tray and moves the tray out.
3. The method for welding a cross beam of a blade type power battery tray according to claim 1, wherein the length of the cross beam is matched with the inner side spacing of the frame, and the tolerance is 0 to +7mm.
4. The blade power battery tray beam welding method according to claim 1, wherein the beam down-voltage Chi Tuopan has a down-voltage height= (battery tray length-1000)/100.
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| CN116214031B (en) | 2024-01-16 |
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