CN113146089A - Front surface assembly welding device and welding method for battery shell of electric vehicle - Google Patents
Front surface assembly welding device and welding method for battery shell of electric vehicle Download PDFInfo
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- CN113146089A CN113146089A CN202110463350.1A CN202110463350A CN113146089A CN 113146089 A CN113146089 A CN 113146089A CN 202110463350 A CN202110463350 A CN 202110463350A CN 113146089 A CN113146089 A CN 113146089A
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- 238000003466 welding Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000003825 pressing Methods 0.000 claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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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
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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- Optics & Photonics (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a front surface assembly welding device and a welding method of a battery shell of an electric automobile, which comprises a workbench, a beam fixing assembly, a side wall positioning assembly, an edge locking assembly and a side edge deformation correcting device for correcting the flatness of two long side walls of the battery shell; a battery shell is placed on the workbench; the battery shell comprises a plurality of cross beams which are sequentially arranged along the length direction; a side wall positioning component which is preliminarily positioned with the side wall of the battery shell is fixed on the workbench; the workbench is also fixedly provided with an edge locking assembly for pressing the edge of the front side of the battery shell against the edge; a beam fixing component which presses the assembled beam which is not fixed into the battery shell is fixed on the workbench; according to the invention, the crossbeam fixing component, the side wall positioning component, the edge locking component and the side edge deformation correcting device are arranged, so that the position of the whole or the assembled part can not move when the battery shell is welded, and the welding quality and the fine product rate after welding are improved.
Description
Technical Field
The invention relates to the technical field of production of battery shells in new energy automobiles, in particular to a front surface assembly welding device and a welding method for a battery shell of an electric automobile.
Background
The pure electric vehicle is a vehicle which takes a vehicle-mounted power supply as power and drives wheels to run by using a motor, and meets various requirements of road traffic and safety regulations. Pure electric vehicles are completely powered by rechargeable batteries (such as lead-acid batteries, nickel-cadmium batteries, nickel-hydrogen batteries, or lithium-ion batteries).
The sufficiency and the duration of the power source are a great difficulty of the pure electric automobile. The battery of the pure electric vehicle is arranged in the battery shell. The capacity of the battery case is also related to the sufficiency of the power source.
The existing battery shell needs to be welded in multiple steps, including the welding of folded lugs, the integral welding of side edges, beams and the like. In the welding process, because the battery shell is large in size, the problems of dislocation and the like easily occur in welding, the welding quality is reduced, and the rejection rate is high.
Like patent publication No. CN212169436U, specifically disclose an electric automobile battery case welding frock, through setting up integral clamp plate, clamp plate upset subassembly, the bottom plate, hold-down mechanism, positioning mechanism and base, realize the locking to battery case, but in battery case manufacture process, especially after the crossbeam is assembled, when assembling the welding, need weld the crossbeam junction, traditional frock lacks the locking to the crossbeam, lead to the crossbeam when the welding, the easy position deviation that takes place, and then lead to the finished product quality to descend, even in the position deviation too big, can lead to the space of installing the battery not enough, and then lead to battery case to scrap.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the front assembling and welding device for the battery shell of the electric automobile is good in welding quality and high in fine product rate.
In order to solve the technical problems, the invention provides the following technical scheme: a front face assembly welding device of a battery shell of an electric automobile comprises a workbench, a beam fixing assembly, a side wall positioning assembly, an edge locking assembly and a side edge deformation correcting device for correcting the flatness of two long side walls of the battery shell; a battery shell is placed on the workbench; the battery shell comprises a shell body, a cross beam and a hanging lug; a plurality of cross beams are sequentially distributed in the shell body along the length direction; two ends of the cross beam are respectively fixed on two long side walls of the battery shell; a side wall positioning assembly which is preliminarily positioned with the side wall of the battery shell is fixed on the workbench; the workbench is also fixedly provided with an edge locking assembly for pressing the edge of the front side of the battery shell against the edge; a beam fixing component which presses the assembled beam which is not fixed into the battery shell is fixed on the workbench; the side edge deformation correcting devices are multiple and are uniformly distributed along the length direction of the battery shell; two end parts of the side edge deformation correcting device are respectively abutted against the inner surface of the long side wall of the battery shell;
the beam fixing assembly comprises a connecting plate; one end of the connecting plate is rotatably connected to the workbench; the other end of the connecting plate moves along the track from the side surface of the workbench to the battery shell; the other end of the connecting plate is pressed on a beam in the battery shell;
the beam fixing assembly comprises a connecting plate, a side plate, a fixing shaft, a positioning clamping plate and a mounting base; the workbench is provided with a plurality of mounting bases surrounding the four sides of the battery shell; the mounting base is fixed on the workbench; two side plates are fixed at the top end of the mounting base; a fixed shaft is fixed between the two side plates; the fixed shaft is sleeved with a connecting plate; the connecting plate moves around the fixed shaft along the track from the side surface of the workbench to the battery shell; the free end of the connecting plate is open and forms two cantilevers; and two positioning clamping plates are arranged on one surface of each cantilever facing the battery shell through screws.
The battery shell welding position deflection is preliminarily positioned through the side wall positioning assembly, the edge locking assembly is arranged to integrally press the battery shell, the crossbeam fixing assembly is arranged, the crossbeam is locked, the flatness of the side edge of the battery shell is guaranteed through the side edge deformation correcting device, the battery shell is enabled not to move in the welding position integrally or in the assembling piece, the welding quality and the fine product rate after welding are greatly improved, and the operation of a welder is greatly facilitated.
Preferably, two symmetrically arranged and inwardly recessed hole grooves are formed in the top end face of the mounting base; the depth direction of the hole groove is vertical to the table top of the workbench; a screw rod is arranged in the hole groove; the end part of the screw is in transmission connection with the output end of the lifting motor; the lifting motor is arranged in the mounting base; a threaded sleeve is sleeved outside the rod body of the screw rod; the screw sleeve is matched with the screw rod through threads; and the top end of the threaded sleeve is fixed with two side plates with vertically arranged plate surfaces.
Preferably, an edge locking assembly for fixing the battery shell on the table top of the workbench is fixed on the workbench; the edge locking assembly comprises an air cylinder seat, a second air cylinder, a motor output shaft, a connecting block and a pressing plate; a plurality of cylinder seats which are arranged at intervals and at equal intervals are arranged on the four sides of the battery shell; a second cylinder is fixed at the top of the cylinder seat; the output end of the second air cylinder is arranged upwards and is used for fixing the rotating motor; the output end of the rotating motor is connected with a motor output shaft in a transmission way; the axial direction of the output shaft of the motor is vertically arranged; a connecting block is fixed at the top end of the output shaft of the motor; the connecting block is horizontally arranged; and the end of the connecting block is fixed with a pressure plate; the distance between one end of the connecting block connected with the motor output shaft and one end of the connecting pressing plate exceeds the closest distance between one end of the connecting block connected with the motor output shaft and the adjacent side of the battery shell.
Preferably, the edge lock assembly further comprises a first cylinder; the first air cylinder is fixed on the table top of the workbench; the output end of the first air cylinder is arranged upwards and is fixedly provided with an air cylinder seat.
Preferably, a side wall positioning assembly is fixed on the table top of the workbench; the side wall positioning assembly comprises a side wall cylinder seat, a side wall cylinder and a positioning plate; a side wall cylinder seat is fixed on the table top of the workbench; the side wall cylinder seat is an L-shaped block; the transverse surface of the L-shaped block is fixed on the table surface of the workbench; a side wall cylinder with an output end facing the battery shell is fixed on the vertical surface of the L-shaped block; and a positioning plate pressed on the side surface of the battery shell is fixed at the output end of the side wall cylinder.
Preferably, the lateral deformation correcting device comprises a sleeve and a pushing component for supporting two lateral walls of the battery shell in the width direction; pushing assemblies which output towards the two ends of the sleeve are respectively arranged in the sleeve; and a support plate with a plate surface parallel to the inner side wall of the battery shell is fixed at the output end of the pushing assembly.
Preferably, the pushing assembly comprises a threaded hole, a first screw and a support plate; threaded holes with opposite thread directions are formed in the two ends of the sleeve inwards; first screws with opposite external thread directions are respectively inserted into the two threaded holes; the threaded hole is matched with the first screw rod inserted into the threaded hole through threads; a supporting plate is fixed at one end of the first screw rod, which extends out of the threaded hole; the first screw rod body is provided with scales.
Preferably, the sleeve is axially through-going; the number of the sleeves is two; the two sleeves are arranged in a straight line shape, and a hexagonal block which can be rotated by a spanner is arranged in the middle; second screws are respectively fixed on two sides of the hexagonal block; the two second screws respectively penetrate into the two sleeves; the end ports of the adjacent ends of the sleeves are nested in the shaft sleeves sleeved outside the second screw rods; the free end of the second screw rod is sleeved with a threaded cylinder arranged in the sleeve; the second screw is matched with the threaded cylinder through threads; the threaded cylinder moves along the length direction of the second screw rod; the threaded cylinder penetrates through a plugging block embedded in the other port of the sleeve; a support plate is fixed at the end part of the threaded cylinder;
the device also comprises a sliding component; the sliding assembly comprises a sliding rail and a sliding block; a sliding rail is fixed on the inner wall of the sleeve; the guide of the slide rail is parallel to the axial direction of the sleeve; the sliding rail is connected with a sliding block in a sliding way; the sliding block is fixedly connected with the thread cylinder.
Preferably, the center of the table top of the workbench is hollow; a telescopic cylinder is arranged below the center of the table top of the workbench; the output end of the telescopic cylinder penetrates through the hollow part of the table top of the workbench and is arranged towards the back of the shell body; the telescopic cylinder is fixed on the ground or on a supporting leg of the workbench.
A welding method of a front surface assembly welding device comprises the following steps:
s1, placing the battery shell welded with the crossbeam on the table top of the workbench;
s2, pushing the battery shell to contact the side wall positioning component to finish the primary positioning of the welding position of the battery shell;
s3, starting the edge locking assembly, pressing the edge of the battery shell towards the workbench, and completing the locking of the edge of the battery shell;
s4, vertically supporting two ends of the side edge deformation correction devices on the inner wall of the long edge of the battery shell respectively, so as to ensure the flatness of the long edge of the battery shell and improve the welding precision;
s5, after the side wall of the battery shell is corrected, an operator pulls the connecting plate to enable the connecting plate to rotate around the fixed shaft, the two positioning clamping plates at the end parts of the connecting plate move towards the cross beam of the battery shell and clamp the cross beam between the two positioning clamping plates to complete positioning and locking of the cross beam, and the cross beam is prevented from shaking during welding;
and S6, welding the assembly seam on the front surface of the battery shell.
Compared with the prior art, the invention has the beneficial effects that:
A. the welding position of the battery shell is subjected to deflection primary positioning through the arranged side wall positioning assembly, the edge locking assembly is arranged to press the whole battery shell, the flatness of the side edge of the battery shell is ensured through the arranged beam fixing assembly, the locking beam and the side edge deformation correcting device, so that the position of the whole or spliced part of the battery shell at the welding position cannot move, the welding quality and the fine product rate after welding are greatly improved, and the operation of a welder is greatly facilitated;
B. through the arrangement of the screw rod and the threaded sleeve, the side plate fixed at the top end of the threaded sleeve moves along the height direction, the height of the rotating end of the connecting plate is adjusted, the connecting plate can adapt to cross beams with different heights in the battery shell, and the application range is wide;
the height of the pressing plate is reduced, so that the pressing plate is pressed on the edge of the battery shell to complete the integral positioning of the battery shell, and the battery shell positioning device is simple in structure, practical and convenient for other operations on the battery shell;
the first air cylinder is started according to the height of the edge of the battery shell to adjust the height of the pressing plate, so that the applicability is high;
placing the battery shell welded with the cross beam on the table top of the workbench, butting the edge of the battery shell to the side wall positioning assembly, starting the side wall air cylinder, driving the positioning plate to be attached to the side wall of the battery shell, realizing primary positioning and ensuring positioning accuracy;
the pushing assembly is arranged in the sleeve, and moves towards the side wall of the battery shell after the output end of the pushing assembly penetrates out of two ends of the sleeve respectively until the supporting plate at the output end of the pushing assembly abuts against the side wall of the battery shell, and the supporting plates abut against the side wall of the battery shell at equal positions in the length direction of the battery shell, so that the correction of the side wall of the battery shell is completed, and the subsequent welding quality is ensured;
the movement of the supporting plate is completed by arranging the threaded hole and the first screw rod, so that the structure is simple and the manufacturing is easy; the hexagonal block is arranged to drive the second screw and the threaded cylinder to move, then the supporting plate is abutted against the inner wall of the battery shell, the hexagonal block is pulled by a wrench to drive the supporting plate to move, and the operation is simple; and the sliding rail and the sliding block are arranged, so that the movement stability of the supporting plate is ensured.
Drawings
Fig. 1 is a schematic perspective view of a front surface assembly welding device of a battery case of an electric vehicle according to a first embodiment of the invention;
FIG. 2 is a perspective view of a beam securing assembly according to one embodiment of the present invention;
FIG. 3 is a perspective view of a sidewall positioning assembly in accordance with one embodiment of the present invention;
FIG. 4 is a perspective view of a battery housing according to one embodiment of the present invention;
FIG. 5 is an elevation view of an edge lock assembly according to one embodiment of the present invention;
FIG. 6 is a side view of a beam securing assembly according to a second embodiment of the present invention;
FIG. 7 is an enlarged view of area A of FIG. 6 in accordance with the present invention;
FIG. 8 is a diagram illustrating a state of use of the apparatus for correcting lateral deformation according to the third embodiment of the present invention;
FIG. 9 is a schematic front sectional view illustrating a lateral deformation correcting device according to a third embodiment of the present invention;
fig. 10 is a schematic front sectional view illustrating a lateral deformation correction device according to a fourth embodiment of the present invention.
Reference numerals: 1. a work table; 2. a beam fixing assembly; 21. a connecting plate; 22. a side plate; 23. a fixed shaft; 24. positioning the clamping plate; 25. installing a base; 26. a hole groove; 27. a screw; 28. a threaded sleeve; 3. a sidewall positioning assembly; 31. a sidewall cylinder block; 32. a sidewall cylinder; 33. positioning a plate; 4. an edge locking assembly; 41. a first cylinder; 42. a cylinder block; 43. a second cylinder; 44. an output shaft of the motor; 45. connecting blocks; 46. pressing a plate; 5. a telescopic cylinder; 6. a battery case; 61. a housing body; 62. a cross beam; 63. hanging a lug; 7. a lateral deformation correction device; 71. a sleeve; 72. a pushing assembly; 721. a threaded hole; 722. a first screw; 723. a threaded barrel; 724. a sliding assembly; 7241. a slide rail; 7242. a slider; 725. a plugging block; 726. a shaft sleeve; 727. a second screw; 73. a hexagonal block; 74. and a support plate.
Detailed Description
In order to facilitate the understanding of the technical solutions of the present invention for those skilled in the art, the technical solutions of the present invention will be further described with reference to the drawings attached to the specification.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Example one
Referring to fig. 1, the embodiment discloses a front surface assembly welding device of an electric vehicle battery shell, which includes a workbench 1, a beam fixing component 2, a side wall positioning component 3 and an edge locking component 4.
Referring to fig. 4, the battery case 6 to be welded includes a case body 61, a cross member 62, and a hanging lug 63. A plurality of cross beams 62 are sequentially arranged in the housing body 61 along the length direction. The two ends of the cross beam 62 are welded to the two long side walls of the battery case, respectively. The outer wall of the shell body 61 is welded with a hanging lug 63.
Referring to fig. 2, the beam fixing assembly 2 includes a connecting plate 21, a side plate 22, a fixing shaft 23, a positioning clamp plate 24, and a mounting base 25. A battery shell is placed on the workbench 1. The workbench 1 is provided with a plurality of mounting bases 25 which surround the four sides of the battery shell and are arranged at equal intervals. The mounting base 25 is fixed on the work table 1 by bolts. Two side plates 22 which are integrally formed are fixed on the top surface of the mounting base 25. A fixed shaft 23 is welded between the two side plates 22. The fixed shaft 23 is sleeved with a connecting plate 21. The connecting plate 21 moves around the fixed shaft 23 along the path from the side of the table 1 to the battery case. The free end of the web 21 is open and forms two cantilevers. The side of each cantilever arm facing the battery case is screw-mounted with a retaining clip 24. The distance between the two positioning clamping plates 24 is equal to the width of the cross beam of the battery shell.
Referring to fig. 1, a side wall positioning assembly 3 is fixed on the table top of the workbench 1 through bolts. The side wall positioning components 3 are arranged on two sides of the battery shell which are perpendicular to each other.
Referring to fig. 3, the sidewall positioning assembly 3 includes a sidewall cylinder block 31, a sidewall cylinder 32, and a positioning plate 33. And a side wall cylinder seat 31 is fixed on the table top of the workbench 1 through bolts. The side wall cylinder block 31 is an L-shaped block. The transverse surface of the L-shaped block is fixed on the table surface of the workbench 1 through bolts. A side wall cylinder 32 with an output end arranged towards the battery shell 6 is fixed on the vertical surface of the L-shaped block. And a positioning plate 33 pressed on the side surface of the battery shell 6 is fixed at the output end of the side wall cylinder 32 through a bolt.
Referring to fig. 5, the edge locking assembly 4 includes a first cylinder 41, a cylinder block 42, a second cylinder 43, a motor output shaft 44, a connecting block 45, and a pressing plate 46. The four sides of the battery shell are provided with a plurality of first air cylinders 41 which are arranged at intervals and in an equidistant mode. The first cylinder 41 is fixed on the table top of the workbench 1 through bolts. The output end of the first cylinder 41 is arranged upwards, and a cylinder seat 42 is fixed through a bolt. The top of the cylinder block 42 is fixed with a second cylinder 43 through bolts. The output end of the second cylinder 43 is disposed upward, and a rotating motor (not shown) is fixed by a bolt. The output end of the rotating motor is connected with a motor output shaft 44 in a transmission way. The axial direction of the motor output shaft 44 is vertically arranged. And a connecting block 45 is fixed at the top end of the motor output shaft 44 through a bolt. The connecting block 45 is horizontally disposed. And a pressing plate 46 is fixed to the end of the connecting block 45. The distance between one end of the connecting block 45 connected with the motor output shaft 44 and one end of the connecting pressure plate 46 exceeds the closest distance between one end of the connecting block 45 connected with the motor output shaft 44 and the adjacent side of the battery shell.
The table top of the working table 1 is hollow (not shown). And a telescopic cylinder 5 is arranged below the center of the table top of the workbench 1. The output end of the telescopic cylinder 5 penetrates through the hollow part of the table top of the workbench and is arranged towards the back of the shell body 61. The telescopic cylinder 5 is fixed on the ground by bolts or fixed on a support leg (not shown) of the workbench 1 by bolts. The output direction of the telescopic cylinder 5 is along the height direction of the workbench 1.
The convenience is after the welding and remove spacing, starts telescopic cylinder 5, and telescopic cylinder 5's output contact promotes casing body 61 and leaves the mesa of workstation 1, avoids casing body 1 to paste on 1 mesa of workstation, is difficult to carry out the unloading.
The working principle of the embodiment is as follows: the battery shell 6 welded with the cross beam 62 is placed on the table top of the workbench 1, the edge of the battery shell 6 is butted onto the side wall positioning assembly 3, the side wall cylinder 32 is started, the positioning plate 33 is driven to be attached to the side wall of the battery shell 6, preliminary positioning is realized, and positioning accuracy is guaranteed; then, the rotating motor is started, the motor output shaft 44 drives the connecting block 45 to rotate, the pressing plate 46 at the end part of the connecting block 45 is positioned above the edge part of the battery shell, the second air cylinder 43 is started to pull back the rotating motor, the height of the rotating motor and the motor output shaft 44 of the rotating motor is reduced, then the height of the pressing plate 46 is reduced, the pressing plate 46 is pressed on the edge part of the battery shell 6, and the integral positioning of the battery shell 6 is completed, so that the structure is simple and practical; then, an operator pulls the connecting plate 21 to enable the connecting plate 21 to rotate around the fixed shaft 23, the two positioning clamping plates 24 at the end parts of the connecting plate 21 move towards the cross beam 62 of the battery shell 6, and the cross beam 62 is clamped between the two positioning clamping plates 24, so that the positioning and locking of the cross beam 62 are completed, and the cross beam 62 is prevented from shaking during welding; the first cylinder 41 can be started according to the height of the edge of the battery shell to adjust the height of the pressure plate 46, and the applicability is high.
Example two
Referring to fig. 6 and 7, unlike the first embodiment, the top end surface of the mounting base 25 is provided with two symmetrically disposed and inwardly recessed holes 26. The depth direction of the hole groove 26 is perpendicular to the table surface of the working table 1. A screw 27 is installed in the hole groove 26. The end of the screw 27 is in transmission connection with the output end of a lifting motor (not shown). The lift motor is mounted within the mounting base 25. A threaded sleeve 28 is sleeved outside the body of the screw 27. The threaded sleeve 28 is in threaded engagement with the threaded rod 27. The top end of the threaded sleeve 28 is fixed with two side plates 22 with vertically arranged plate surfaces through bolts.
Through starting elevator motor, drive screw rod 27 and rotate, the swivel nut 28 that screw rod 27 cup jointed outward moves along the direction of height, and then makes the fixed curb plate 22 in swivel nut 28 top move along the direction of height, adjusts the height that connecting plate 21 rotated the end, can adapt to the crossbeam 62 of not co-altitude in the battery case 6, and application scope is wide.
EXAMPLE III
Referring to the drawings, the front assembly welding device further comprises a lateral deformation correcting device 7, which comprises a sleeve 71 and a pushing assembly 72.
The pushing assembly 72 includes a threaded hole 721, a first screw 722, and a support plate 74. Two ends of the sleeve 71 are provided with screw holes 721 with opposite screw directions inwards. First screws 722 with opposite external thread directions are inserted into the two threaded holes 721. The screw hole 721 is screw-engaged with the first screw 722 inserted into the screw hole 721. The end of the first screw 722 extending out of the threaded hole 721 is welded with the support plate 74.
Referring to fig. 8, the support plate 74 is extended to abut against the two inner walls of the battery case 6. And a plurality of sleeves 71 with the axial direction perpendicular to the length direction of the battery shell 6 are arranged at equal intervals in the length direction in the battery shell 6.
The first screw 722 is provided with scales on the shaft.
The sleeve 71 is placed in the battery shell 6, then the sleeve 71 and the first screw 722 rotate relatively, the first screw 722 extends out of the threaded hole 721 to drive the support plates 74 to move outwards, then a new sleeve 71 is taken out after the two support plates 74 abut against the inner walls of the two sides of the battery shell 6, the operations are repeated, the support plates 74 are used for supporting the inner wall of the battery shell 6 at the 1/10, 4/10, 6/10 and 9/10 of the battery shell 6, the lengths of the first screw 722 are ensured to be equal through observing scales, and then the inner wall of the battery shell 6 is supported and corrected, and the subsequent welding quality is ensured.
Example four
Referring to fig. 10, a fourth embodiment is different from the third embodiment in that the sleeve 71 penetrates in the axial direction. The number of the sleeves 71 is two. And the two sleeves 71 are arranged in a straight line, and a hexagonal block 73 which can be rotated by a wrench is arranged in the middle. Second screw rods 727 are welded to two sides of the hexagonal block 73 respectively. Two second screws 727 are respectively inserted into the two sleeves 71. And the shaft sleeve 726 sleeved outside the second screw 727 is nested in the port of the adjacent end of the sleeve 71. The free end of the second screw 727 is sleeved with a threaded barrel 723 arranged in the sleeve 71. The second screw 727 is in threaded engagement with the threaded barrel 723. The threaded barrel 723 moves along the length of the second screw 727. The threaded barrel 723 passes through a plug block 725 embedded in the other port of the sleeve 71. The end of the threaded barrel 723 is welded to the support plate 74.
The slide assembly 724 includes a slide rail 7241 and a slider 7242. The sliding rail 7241 is welded on the inner wall of the sleeve 71. The guide of the slide rail 7241 is parallel to the axial direction of the sleeve 71. The slide rail 7241 is slidably connected to the slider 7242. The sliding block 7242 is welded to the threaded barrel 723.
The threaded barrel 723 is rectangular in cross-sectional shape.
The free end of the second screw 727 is within the sleeve 71.
The hexagonal block 73 is rotated through a wrench, then the second screw 727 is driven to rotate, the second screw 727 enables the threaded cylinder 723 sleeved outside the second screw to move, specifically, under the limit of the sliding block 7242, the second screw moves along the guide of the sliding rail 7241, then the supporting plate 74 at the end part of the threaded sleeve abuts against the inner walls of the two sides of the battery shell 6, the supporting plate 74 abuts against the inner walls of the two sides of the battery shell 6 at the equal dividing position in the length direction of the battery shell 6, fine adjustment is completed by rotating the hexagonal block 73, correction is completed on the side wall of the battery shell 6, and the subsequent welding quality is guaranteed.
A welding method using the front surface assembly welding device; the method comprises the following steps:
s1, placing the battery shell welded with the crossbeam on the table top of the workbench;
s2, butting the edge of the battery shell to the side wall positioning assembly, starting the side wall air cylinder, driving the positioning plate to be attached to the side wall of the battery shell, realizing primary positioning and ensuring positioning accuracy;
s3, starting the rotating motor, driving the connecting block to rotate through the motor output shaft, enabling the pressing plate at the end part of the connecting block to be positioned above the edge part of the battery shell, starting the second air cylinder to pull back the rotating motor, reducing the height of the rotating motor and the motor output shaft thereof, and then reducing the height of the pressing plate, enabling the pressing plate to be pressed on the edge part of the battery shell, and completing the integral positioning of the battery shell, and the structure is simple and practical;
s4 supports the both ends of a plurality of side deformation orthotic devices respectively vertically on battery case' S long limit inner wall, guarantees the roughness on the long limit of battery case, improves the precision when welding, and is concrete including following steps:
s4.1, placing the sleeve into a battery shell, enabling the sleeve and a first screw rod to rotate relatively, enabling the first screw rod to extend out of a threaded hole to drive supporting plates to move outwards, taking out a new sleeve after two supporting plates abut against the inner walls of two sides of the battery shell, repeating the operation, supporting the inner wall of the battery shell by the supporting plates at 1/10, 4/10, 6/10 and 9/10 of the battery shell, and ensuring that the lengths pulled out by the first screw rod are equal through observing scales so as to complete supporting and correcting the inner wall of the battery shell and ensure the subsequent welding quality;
or S4.2 is adopted, the hexagonal block is rotated through the wrench, then the second screw rod is driven to rotate, the second screw rod enables the threaded cylinder sleeved outside the second screw rod to move, specifically, under the limit of the sliding block, the second screw rod moves along the guide of the sliding rail, then the supporting plates at the end parts of the threaded sleeves are enabled to abut against the inner walls at the two sides of the battery shell, the supporting plates abut against the inner walls at the two sides of the battery shell at the equally-divided positions in the length direction of the battery shell, fine adjustment is completed through rotating the hexagonal block, the side wall of the battery shell is corrected, and the subsequent welding quality is guaranteed;
s5, after the side wall of the battery shell is corrected, an operator pulls the connecting plate to enable the connecting plate to rotate around the fixed shaft, the two positioning clamping plates at the end parts of the connecting plate move towards the cross beam of the battery shell and clamp the cross beam between the two positioning clamping plates to complete positioning and locking of the cross beam, and the cross beam is prevented from shaking during welding;
and S6, welding the assembly seam on the front surface of the battery shell.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The above-mentioned embodiments only represent embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the concept of the present invention, and these embodiments are all within the protection scope of the present invention.
Claims (10)
1. The utility model provides a front assembly welding device of electric automobile battery shell which characterized in that: the device comprises a workbench, a beam fixing assembly, a side wall positioning assembly, an edge locking assembly and a side edge deformation correcting device for correcting the flatness of two long side walls of a battery shell; a battery shell is placed on the workbench; the battery shell comprises a shell body and a cross beam; a plurality of cross beams are sequentially distributed in the shell body along the length direction; two ends of the cross beam are respectively fixed on two long side walls of the battery shell; a side wall positioning assembly which is preliminarily positioned with the side wall of the battery shell is fixed on the workbench; the workbench is also fixedly provided with an edge locking assembly for pressing the edge of the front side of the battery shell against the edge; a beam fixing component which presses the assembled beam which is not fixed into the battery shell is fixed on the workbench; the side edge deformation correcting devices are multiple and are uniformly distributed along the length direction of the battery shell; two end parts of the side edge deformation correcting device are respectively abutted against the inner surface of the long side wall of the battery shell;
the beam fixing assembly comprises a connecting plate; one end of the connecting plate is rotatably connected to the workbench; the other end of the connecting plate moves along the track from the side surface of the workbench to the battery shell; the other end of the connecting plate is pressed on a beam in the battery shell;
the beam fixing assembly comprises a connecting plate, a side plate, a fixing shaft, a positioning clamping plate and a mounting base; the workbench is provided with a plurality of mounting bases surrounding the four sides of the battery shell; the mounting base is fixed on the workbench; two side plates are fixed at the top end of the mounting base; a fixed shaft is fixed between the two side plates; the fixed shaft is sleeved with a connecting plate; the connecting plate moves around the fixed shaft along the track from the side surface of the workbench to the battery shell; the free end of the connecting plate is open and forms two cantilevers; and two positioning clamping plates are arranged on one surface of each cantilever facing the battery shell through screws.
2. The front surface assembly welding device of the battery shell of the electric automobile according to claim 1, characterized in that: the top end face of the mounting base is provided with two symmetrically-arranged and inwardly-recessed hole grooves; the depth direction of the hole groove is vertical to the table top of the workbench; a screw rod is arranged in the hole groove; the end part of the screw is in transmission connection with the output end of the lifting motor; the lifting motor is arranged in the mounting base; a threaded sleeve is sleeved outside the rod body of the screw rod; the screw sleeve is matched with the screw rod through threads; and the top end of the threaded sleeve is fixed with two side plates with vertically arranged plate surfaces.
3. The front surface assembly welding device of the battery shell of the electric automobile according to claim 1, characterized in that: an edge locking assembly for fixing the battery shell to the table surface of the workbench is fixed on the workbench; the edge locking assembly comprises an air cylinder seat, a second air cylinder, a motor output shaft, a connecting block and a pressing plate; a plurality of cylinder seats which are arranged at intervals and at equal intervals are arranged on the four sides of the battery shell; a second cylinder is fixed at the top of the cylinder seat; the output end of the second air cylinder is arranged upwards and is used for fixing the rotating motor; the output end of the rotating motor is connected with a motor output shaft in a transmission way; the axial direction of the output shaft of the motor is vertically arranged; a connecting block is fixed at the top end of the output shaft of the motor; the connecting block is horizontally arranged; and the end of the connecting block is fixed with a pressure plate; the distance between one end of the connecting block connected with the motor output shaft and one end of the connecting pressing plate exceeds the closest distance between one end of the connecting block connected with the motor output shaft and the adjacent side of the battery shell.
4. The front surface assembly welding device of the battery shell of the electric automobile according to claim 3, characterized in that: the edge locking assembly further comprises a first cylinder; the first air cylinder is fixed on the table top of the workbench; the output end of the first air cylinder is arranged upwards and is fixedly provided with an air cylinder seat.
5. The front surface assembly welding device of the battery shell of the electric automobile according to claim 1, characterized in that: a side wall positioning component is fixed on the table top of the workbench; the side wall positioning assembly comprises a side wall cylinder seat, a side wall cylinder and a positioning plate; a side wall cylinder seat is fixed on the table top of the workbench; the side wall cylinder seat is an L-shaped block; the transverse surface of the L-shaped block is fixed on the table surface of the workbench; a side wall cylinder with an output end facing the battery shell is fixed on the vertical surface of the L-shaped block; and a positioning plate pressed on the side surface of the battery shell is fixed at the output end of the side wall cylinder.
6. The front surface assembly welding device of the battery shell of the electric automobile according to claim 1, characterized in that: the side edge deformation correcting device comprises a sleeve and a pushing assembly for supporting two side walls of the battery shell in the width direction; pushing assemblies which output towards the two ends of the sleeve are respectively arranged in the sleeve; and a support plate with a plate surface parallel to the inner side wall of the battery shell is fixed at the output end of the pushing assembly.
7. The front surface assembly welding device of the battery shell of the electric automobile according to claim 6, characterized in that: the pushing assembly comprises a threaded hole, a first screw rod and a supporting plate; threaded holes with opposite thread directions are formed in the two ends of the sleeve inwards; first screws with opposite external thread directions are respectively inserted into the two threaded holes; the threaded hole is matched with the first screw rod inserted into the threaded hole through threads; a supporting plate is fixed at one end of the first screw rod, which extends out of the threaded hole; the first screw rod body is provided with scales.
8. The front surface assembly welding device of the battery shell of the electric automobile according to claim 6, characterized in that: the sleeve is axially communicated; the number of the sleeves is two; the two sleeves are arranged in a straight line shape, and a hexagonal block which can be rotated by a spanner is arranged in the middle; second screws are respectively fixed on two sides of the hexagonal block; the two second screws respectively penetrate into the two sleeves; the end ports of the adjacent ends of the sleeves are nested in the shaft sleeves sleeved outside the second screw rods; the free end of the second screw rod is sleeved with a threaded cylinder arranged in the sleeve; the second screw is matched with the threaded cylinder through threads; the threaded cylinder moves along the length direction of the second screw rod; the threaded cylinder penetrates through a plugging block embedded in the other port of the sleeve; a support plate is fixed at the end part of the threaded cylinder;
the device also comprises a sliding component; the sliding assembly comprises a sliding rail and a sliding block; a sliding rail is fixed on the inner wall of the sleeve; the guide of the slide rail is parallel to the axial direction of the sleeve; the sliding rail is connected with a sliding block in a sliding way; the slider is fixed with the thread cylinder.
9. The front surface assembly welding device of the battery shell of the electric automobile according to claim 1, characterized in that: the center of the table top of the workbench is hollow; a telescopic cylinder is arranged below the center of the table top of the workbench; the output end of the telescopic cylinder penetrates through the hollow part of the table top of the workbench and is arranged towards the back of the shell body; the telescopic cylinder is fixed on the ground or on a supporting leg of the workbench.
10. A welding method using the front surface assembly welding apparatus according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:
s1, placing the battery shell welded with the crossbeam on the table top of the workbench;
s2, pushing the battery shell to contact the side wall positioning component to finish the primary positioning of the welding position of the battery shell;
s3, starting the edge locking assembly, pressing the edge of the battery shell towards the workbench, and completing the locking of the edge of the battery shell;
s4, vertically supporting two ends of the side edge deformation correction devices on the inner wall of the long edge of the battery shell respectively, so as to ensure the flatness of the long edge of the battery shell and improve the welding precision;
s5, after the side wall of the battery shell is corrected, an operator pulls the connecting plate to enable the connecting plate to rotate around the fixed shaft, the two positioning clamping plates at the end parts of the connecting plate move towards the cross beam of the battery shell and clamp the cross beam between the two positioning clamping plates to complete positioning and locking of the cross beam, and the cross beam is prevented from shaking during welding;
and S6, welding the assembly seam on the front surface of the battery shell.
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| CN202110463350.1A CN113146089A (en) | 2021-04-25 | 2021-04-25 | Front surface assembly welding device and welding method for battery shell of electric vehicle |
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| CN202110463350.1A CN113146089A (en) | 2021-04-25 | 2021-04-25 | Front surface assembly welding device and welding method for battery shell of electric vehicle |
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Cited By (1)
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