CN116475578B - New energy automobile battery box arc welding process - Google Patents
New energy automobile battery box arc welding process Download PDFInfo
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- CN116475578B CN116475578B CN202310589538.XA CN202310589538A CN116475578B CN 116475578 B CN116475578 B CN 116475578B CN 202310589538 A CN202310589538 A CN 202310589538A CN 116475578 B CN116475578 B CN 116475578B
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- 238000003466 welding Methods 0.000 title claims abstract description 537
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005452 bending Methods 0.000 claims abstract description 16
- 239000002131 composite material Substances 0.000 claims abstract description 10
- 230000001276 controlling effect Effects 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0869—Devices involving movement of the laser head in at least one axial direction
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
-
- 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
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses an arc welding process of a battery box of a new energy automobile, which relates to the technical field of welding of automobile battery boxes, wherein a laser arc welding composite welding device is adopted to arc-weld a battery box body, and comprises a welding platform assembly, a first welding assembly, a second welding assembly and a welding automatic controller; the welding platform assembly comprises a rotary lifting mechanism and a platform plate, wherein the top of the rotary lifting mechanism is fixed at the top of a factory building and is positioned right above the battery box body, and the platform plate is arranged at the bottom movable part of the rotary lifting mechanism. The invention simultaneously carries out laser welding and arc welding on the inner side and the outer side of the frame bending joint of the battery box, realizes full welding of the inner side and the outer side, avoids the phenomenon of insufficient strength and inner side stress tearing caused by welding only on the outer side, can set lower welding operation power, saves electric quantity, greatly improves the welding speed by adopting the welding mode of simultaneous inner and outer operation, and can ensure the air tightness of welding.
Description
Technical Field
The invention relates to the technical field of welding of automobile battery boxes, in particular to an arc welding process of a battery box of a new energy automobile.
Background
Along with the development of technology, the development of new energy automobiles is rapid in recent years, and along with the development of lithium battery technology, the endurance anxiety of the new energy automobiles is greatly relieved, so that more and more new energy automobiles are brought out, and sales volume is also greatly increased.
However, with the increase of the endurance mileage, the carrying weight of the lithium battery is inevitably increased, and the requirements on the strength and the tightness of the battery box carrying the lithium battery are also increased.
The manufacturing of battery case adopts aluminum plate to cut the back and bends and form the rectangle box body generally, and the intersection of bending of four limits needs the welding, all needs the basic link plate of various electrical components of welding on each board, therefore the reliable welding process of high efficiency not only can promote the intensity and the air tightness of battery case greatly, can also promote the production efficiency of battery case greatly.
In the traditional battery box welding process, an arc welding or laser welding mode is generally adopted for carrying out outside single-side welding, because the stress of the battery box mainly comes from the gravity of the battery on the inner side or inertial impact during movement, the single-side welding process has the risk of insufficient strength, and in order to obtain enough welding depth at a thicker aluminum plate joint, the single-side welding mode often needs more welding time, so that the whole welding process consumes too long time.
Disclosure of Invention
In order to solve the problem of the traditional battery box welding process, the invention provides a new energy automobile battery box arc welding process. The following technical scheme is adopted:
the arc welding process of the battery box of the new energy automobile adopts a laser arc welding composite welding device to arc weld the battery box body, wherein the laser arc welding composite welding device comprises a welding platform assembly, a first welding assembly, a second welding assembly and a welding automatic controller;
the welding platform assembly comprises a rotary lifting mechanism and a platform plate, wherein the top of the rotary lifting mechanism is fixed at the top of a factory building and is positioned right above the battery box body, and the platform plate is installed at the bottom movable part of the rotary lifting mechanism and moves along with the movable part;
the first welding assembly and the second welding assembly are respectively connected below the welding platform assembly, the first welding assembly is positioned at the outer side of the part to be welded of the battery box body, and the second welding assembly is positioned at the inner side of the part to be welded of the battery box body;
the welding automatic controller is used for respectively controlling actions of electric actuators of the welding platform assembly, the first welding assembly and the second welding assembly;
the arc welding process of the battery box comprises the following steps:
step 1, welding a welding seam at a bending joint of a battery box body frame, controlling a welding platform assembly to act by a welding automatic controller, enabling a first welding assembly and a second welding assembly to be respectively positioned at the bottoms of the inner side and the outer side of the bending joint of the battery box body, enabling a welding gun of the first welding assembly to be 3-5mm lower than that of the second welding assembly, enabling the first welding assembly and the second welding assembly to be started simultaneously, completing the whole welding seam from bottom to top, and enabling the welding platform assembly to act to adjust the positions of the first welding assembly and the second welding assembly to sequentially complete four welding seams;
step 2, welding an electric device hanging plate on a side plate of a battery box body, controlling a welding platform assembly to act by a welding automatic controller, enabling a first welding assembly and a second welding assembly to be symmetrically located at any positions on the inner side and the outer side of a reserved gap of the electric device hanging plate of the battery box body respectively, assembling and fixing the electric device hanging plate at the reserved gap, completing outside welding of the electric device hanging plate under the combined action of the welding automatic controller and the welding platform assembly, closing the first welding assembly, reversely acting the welding platform assembly, starting the second welding assembly, and completing inside welding of the electric device hanging plate.
Through the technical scheme, when the battery box body formed by the thicker aluminum plates is welded by the traditional single arc welding process or the traditional laser welding process, in order to ensure that the welding seam with enough depth and the alloy element content of the welding seam are obtained, the battery box body needs to be welded at a slower welding speed by adopting a laser arc welding composite welding device, and meanwhile, the laser welding and the arc welding are carried out on the inner side and the outer side of the frame bending joint of the battery box body, so that full welding of the inner side and the outer side is realized, and the phenomena of insufficient strength and inner side stress tearing caused by welding only the outer side are avoided.
In the step 1, the welding gun of the first welding component is 3-5mm lower than that of the second welding component, so that the phenomenon of welding through caused by the fact that the two welding components are opposite to each other simultaneously is avoided, and when the first welding component operates, as the welding gun of the second welding component just completes welding at the inner side, the temperature of the welding gun is very high, the first welding component can be provided with lower operation power, electric quantity is saved, the welding speed is greatly improved by adopting the welding mode of simultaneous inner and outer operation, and the welding air tightness can be ensured.
Optionally, the rotary lifting mechanism includes base plate, rotating electrical machines, carousel and a pair of electric telescopic push rod, the upper surface fixed at the factory building top of base plate, the rotating electrical machines casing is fixed at the lower surface of base plate, the upper surface of carousel is connected at the axis of rotation tip of rotating electrical machines, and the lower surface at the carousel is connected to the one end of a pair of electric telescopic push rod, the other end at a pair of electric telescopic push rod is connected to the upper surface of platform board.
Through above-mentioned technical scheme, adopt the base plate to provide the erection bracing for whole mechanism, the rotating electrical machines provides rotary power, electric telescopic push rod provides the power of going up and down, when the rotating electrical machines action, carousel drive a pair of electric telescopic push rod rotates, the first welding subassembly and the second welding subassembly of while platform board drive installation above that rotate, adjust the welding position, when a pair of electric telescopic push rod acts simultaneously, can drive the platform board and first welding subassembly and the second welding subassembly up-and-down motion on it, accomplish the welding of perpendicular welding seam, electric telescopic push rod's action speed is just the welding speed of first welding subassembly and second welding subassembly.
Optionally, the first welding assembly includes a first connecting rod, a head shaking device and a first welding head, one end of the first connecting rod is connected below the welding platform assembly, the head shaking device is installed at the other end of the first connecting rod, and the first welding head is installed at a movable part of the head shaking device, swings up and down along with the movable part and faces the outer side of a part to be welded of the battery box body;
the second welding assembly comprises a second connecting rod, a welding head connecting block and a second welding head, one end of the second connecting rod is connected to the lower portion of the welding platform assembly, the welding head connecting block is arranged at the other end of the second connecting rod, and the second welding head is arranged at the welding head connecting block and faces the inner side of a to-be-welded part of the battery box body.
Through above-mentioned technical scheme, the device of shaking head of first welding set spare can be the mechanism of shaking head of electric fan, and specifically is a motor drive four bar linkage that shakes head rotates, can realize the orientation adjustment of first welding head, and the second welding set spare is because setting up in the inboard of battery case body, and the aesthetic measure to the welding seam requires not just outside, can set up fixed welding angle can.
Optionally, the welding platform further comprises a pair of electric linear guide rails, the linear rails of the electric linear guide rails are fixed below the welding platform assembly, and one ends of the first connecting rod and the second connecting rod are respectively connected to the sliding blocks of the pair of electric linear guide rails and move along with the sliding blocks.
Through the technical scheme, the pair of electric linear guide rails can realize the transverse movement of the first welding assembly and the second welding assembly, the requirement of the step 2 on the transverse movement of the rectangular welding line of the hanging plate of the electric device is met, and the welding automatic controller respectively controls the execution actions of the pair of electric linear guide rails.
Optionally, the first welding head is a laser welding head and the second welding head is an arc welding head.
Through above-mentioned technical scheme, be used for the first soldered connection of welding battery case body outside to adopt the laser welding head, under the reliable circumstances of welding seam intensity, the welding seam is smoother pleasing to the eye more, and inboard welded second soldered connection adopts the arc welding to connect, earlier than first soldered connection in the welding position, can be more quick dissolve the metal of welded part.
Optionally, the first welding component and the second welding component adopt a pair respectively, and symmetrical connection is in the below of welding platform subassembly, and when a pair of first welding component and second welding component started simultaneously, two battery case body frame joints welding seam of bending of symmetry position was accomplished simultaneously.
Through above-mentioned technical scheme, adopt symmetrical a pair of first welding subassembly and the second welding subassembly of connection in welding platform subassembly's below, because the frame of battery case body is the rectangle, four junctions need weld, adopt the welding seam of a pair of first welding subassembly and second welding subassembly simultaneous welding symmetry position, can improve welding speed greatly.
Optionally, setting the rated welding power of the first welding component to be W1, the rated welding power of the second welding component to be W2, and the highest welding travelling speed to be v; the highest welding travelling speed of the first welding assembly and the second welding assembly is v;
in step 1, the welding automatic controller controls the welding power of the first welding component to be W1 three seconds before welding, and three seconds laterW1, the welding traveling speed is v, the welding power of the second welding assembly is W2, and the welding traveling speed is v;
in step 2, the welding automatic controller controls the welding power of the first welding component to be W1, the welding power of the second welding component to be W2, and the welding travelling speeds are allv。
By the technical scheme, in the step 1, since the first welding component is 3-5mm lower than the second welding component, the first welding component is required to run at full power three seconds before welding, and when the first welding head of the first welding component reaches the corresponding position of the inner side welding seam after three seconds, the second welding head finishes welding at the inner side, and the temperature is higher, so that only the welding is requiredThe power of W1 may be v in terms of the welding speed since the welding depth on one side is shallow by welding both inside and outside.
Optionally, the welding robot is a microcontroller-based circuit board.
Through the technical scheme, the circuit board based on the microcontroller is adopted, so that the action of each electric actuator can be controlled according to the set control program, the efficiency is high, and the degree of automation is high.
In summary, the present invention includes at least one of the following beneficial technical effects:
the invention provides a new energy automobile battery box arc welding process, and simultaneously, laser welding and arc welding are carried out on the inner side and the outer side of a frame bending joint of a battery box, so that full welding of the inner side and the outer side is realized, the phenomena of insufficient strength and inner side stress tearing caused by welding only the outer side are avoided, lower welding operation power can be set, electric quantity is saved, the welding speed is greatly improved by adopting the welding mode of simultaneous inner and outer operation, and the welding air tightness can be ensured.
Drawings
FIG. 1 is a schematic illustration of the process flow of the present invention;
FIG. 2 is a schematic view of a hybrid welding apparatus for laser arc welding according to the present invention;
fig. 3 is a schematic diagram of the electrical connection principle of the laser arc welding composite welding device of the invention.
Reference numerals illustrate: 1. a welding platform assembly; 11. a platform plate; 12. a substrate; 13. a rotating electric machine; 14. a turntable; 15. an electric telescopic push rod; 2. a first welding assembly; 21. a first connecting rod; 22. a head shaking device; 23. a first welding head; 3. a second welding assembly; 31. a second connecting rod; 32. a welding head connecting block; 33. a second welding head; 4. a welding automatic controller; 5. an electric linear guide rail; 100. a battery case body; 101. an electrical device hanging plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The embodiment of the invention discloses an arc welding process for a battery box of a new energy automobile.
Referring to fig. 1 to 3, a new energy automobile battery box arc welding process uses a laser arc welding composite welding device to arc weld a battery box body 100, wherein the laser arc welding composite welding device comprises a welding platform assembly 1, a first welding assembly 2, a second welding assembly 3 and a welding automatic controller 4;
the welding platform assembly 1 comprises a rotary lifting mechanism and a platform plate 11, wherein the top of the rotary lifting mechanism is fixed at the top of a factory building and is positioned right above the battery box body 100, and the platform plate 11 is arranged at the bottom movable part of the rotary lifting mechanism and moves along with the movable part;
the first welding component 2 and the second welding component 3 are respectively connected below the welding platform component 1, the first welding component 2 is positioned at the outer side of the part to be welded of the battery box body 100, and the second welding component 3 is positioned at the inner side of the part to be welded of the battery box body 100;
the welding automatic controller 4 controls the actions of the electric actuators of the welding platform assembly 1, the first welding assembly 2 and the second welding assembly 3 respectively;
the arc welding process of the battery box comprises the following steps:
step 1, welding a welding seam at a bending joint of a frame of a battery box body 100, controlling a welding platform assembly 1 to act by a welding automatic controller 4, enabling a first welding assembly 2 and a second welding assembly 3 to be respectively positioned at the bottoms of the inner side and the outer side of the bending joint of the battery box body 100, enabling a welding gun of the first welding assembly 2 to be lower than a welding gun of the second welding assembly 3 by 3-5mm, enabling the first welding assembly 2 and the second welding assembly 3 to be started simultaneously, completing the whole welding seam from bottom to top, and enabling the welding platform assembly 1 to act to adjust the positions of the first welding assembly 2 and the second welding assembly 3 to sequentially complete four welding seams;
step 2, the electric device hanging plate 101 on the side plate of the battery box body 100 is welded, the welding automatic controller 4 controls the welding platform assembly 1 to act, so that the first welding assembly 2 and the second welding assembly 3 are symmetrically located at any positions on the inner side and the outer side of the reserved gap of the electric device hanging plate of the battery box body 100 respectively, the electric device hanging plate 101 is assembled and fixed at the reserved gap, the welding automatic controller 4 controls the welding platform assembly 1 and the first welding assembly 2 to finish the outer side welding of the electric device hanging plate 101 under the combined action, then the first welding assembly 2 is closed, the welding platform assembly 1 acts reversely, the second welding assembly 3 is started, and the inner side welding of the electric device hanging plate 101 is finished.
In the conventional single arc welding process or laser welding process, when a battery box body 100 formed by thicker aluminum plates is welded, in order to ensure that a weld of sufficient depth and alloy element content of the weld are obtained, a slower welding speed is required, a laser arc welding composite welding device is adopted to arc-weld the battery box body 100, and simultaneously, laser welding and arc welding are carried out on the inner side and the outer side of a frame bending joint of the battery box body 100, so that full welding of the inner side and the outer side is realized, and the phenomena of insufficient strength and inner side stress tearing caused by welding only the outer side are avoided.
In the step 1, the welding gun of the first welding component 2 is 3-5mm lower than the welding gun of the second welding component 3, so that the phenomenon of welding through caused by the fact that two welding components are opposite to each other simultaneously is avoided, and when the first welding component 2 is operated, as the welding gun of the second welding component 3 just completes welding at the inner side, the temperature is very high, the first welding component 2 can be provided with lower operating power, electric quantity is saved, the welding speed is greatly improved by adopting the welding mode of simultaneous inner and outer operation, and the welding air tightness can be ensured.
The rotary lifting mechanism comprises a base plate 12, a rotary motor 13, a rotary table 14 and a pair of electric telescopic push rods 15, wherein the upper surface of the base plate 12 is fixed at the top of a factory building, a casing of the rotary motor 13 is fixed at the lower surface of the base plate 12, the upper surface of the rotary table 14 is connected to the end part of a rotating shaft of the rotary motor 13, one ends of the pair of electric telescopic push rods 15 are connected to the lower surface of the rotary table 14, and the upper surface of the platform plate 11 is connected to the other ends of the pair of electric telescopic push rods 15.
The base plate 12 is adopted to provide mounting support for the whole mechanism, the rotating motor 13 provides rotating power, the electric telescopic push rods 15 provide lifting power, when the rotating motor 13 acts, the turntable 14 drives the pair of electric telescopic push rods 15 to rotate, meanwhile, the platform plate 11 drives the first welding component 2 and the second welding component 3 arranged on the turntable to rotate, the welding position is adjusted, when the pair of electric telescopic push rods 15 act simultaneously, the platform plate 11 and the first welding component 2 and the second welding component 3 on the platform plate can be driven to move up and down, welding of vertical welding seams is completed, and the action speed of the electric telescopic push rods 15 is the welding speed of the first welding component 2 and the second welding component 3.
The first welding assembly 2 comprises a first connecting rod 21, a head shaking device 22 and a first welding head 23, one end of the first connecting rod 21 is connected below the welding platform assembly 1, the head shaking device 22 is arranged at the other end of the first connecting rod 21, and the first welding head 23 is arranged at a movable part of the head shaking device 22, swings up and down along with the movable part and faces the outer side of a part to be welded of the battery box body 100;
the second welding assembly 3 comprises a second connecting rod 31, a welding head connecting block 32 and a second welding head 33, one end of the second connecting rod 31 is connected below the welding platform assembly 1, the welding head connecting block 32 is arranged at the other end of the second connecting rod 31, and the second welding head 33 is arranged at the welding head connecting block 32 and faces the inner side of a part to be welded of the battery box body 100.
The oscillating device 22 of the first welding assembly 2 can be an oscillating mechanism of an electric fan, specifically, an oscillating motor drives a four-bar mechanism to rotate, so that the orientation of the first welding head 23 can be adjusted, and the second welding assembly 3 is arranged on the inner side of the battery box body 100, so that the requirements on the aesthetic degree of a welding seam are not as good as the outer side, and a fixed welding angle can be set.
The welding platform assembly further comprises a pair of electric linear guide rails 5, wherein linear tracks of the electric linear guide rails 5 are fixed below the welding platform assembly 1, and one ends of a first connecting rod 21 and a second connecting rod 31 are respectively connected to sliding blocks of the pair of electric linear guide rails 5 and move along with the sliding blocks.
The pair of electric linear guide rails 5 can realize the transverse movement of the first welding assembly 2 and the second welding assembly 3, so that the requirement of the step 2 on the transverse movement of the rectangular welding line of the electric device hanging plate 101 is met, and the welding automatic controller 4 respectively controls the execution actions of the pair of electric linear guide rails 5.
The first welding head 23 is a laser welding head and the second welding head 33 is an arc welding head.
The first welding head 23 for welding the outer side of the battery box body 100 adopts a laser welding head, under the condition of reliable welding seam strength, the welding seam is smoother and more attractive, the second welding head 33 for welding the inner side adopts an arc welding joint, and the welding position is earlier than the first welding head 23, so that the metal at the welding position can be dissolved more rapidly.
The first welding component 2 and the second welding component 3 are respectively and symmetrically connected below the welding platform component 1, and when the first welding component 2 and the second welding component 3 are started simultaneously, the welding seams at the bending joints of the two battery box body 100 frames at the symmetrical positions are completed simultaneously.
The pair of first welding components 2 and second welding components 3 symmetrically connected below the welding platform component 1 are adopted, and as the frame of the battery box body 100 is rectangular, four joints need to be welded, and the pair of first welding components 2 and second welding components 3 are adopted to simultaneously weld welding seams at symmetrical positions, so that the welding speed can be greatly improved.
Setting the rated welding power of the first welding component 2 as W1, the rated welding power of the second welding component 3 as W2 and the highest welding travelling speed as v; the highest welding travelling speeds of the first welding assembly 2 and the second welding assembly 3 are v;
in step 1, the welding automatic controller 4 controls the welding power of the first welding assembly 2 to be W1 three seconds before welding, and three seconds after weldingW1, the welding traveling speed is v, the welding power of the second welding assembly 3 is W2, and the welding traveling speed is v;
in step 2, the welding automatic controller 4 controls the welding power of the first welding assembly 2 to be W1, the welding power of the second welding assembly 3 to be W2, and the welding traveling speeds are allv。
In step 1, since the first welding assembly 2 is 3-5mm lower than the second welding assembly 3, the first welding assembly 2 is required to run at full power three seconds before welding, and when the first welding head 23 of the first welding assembly 2 reaches the corresponding position of the inner side weld after three seconds, the second welding head 33 has completed welding on the inner side, since the temperature thereof is higher, onlyThe power of W1 may be v in terms of the welding speed since the welding depth on one side is shallow by welding both inside and outside.
The welding robot 4 is a microcontroller-based circuit board.
By adopting the circuit board based on the microcontroller, each electric actuator can be controlled according to a set control program, so that the efficiency is high and the degree of automation is high.
The invention relates to a new energy automobile battery box arc welding technology concrete implementation principle:
under the welding application scene of a certain type of new energy automobile battery box, firstly cutting a plate, bending four sides, hoisting the plate on a welding platform for fixing, firstly welding a welding seam at a bending joint of a frame of a battery box body 100, controlling a rotating motor 13 to act by a welding automatic controller 4, driving a pair of electric telescopic push rods 15 to rotate by a turntable 14, simultaneously driving a first welding component 2 and a second welding component 3 arranged on the turntable 14 by the platform plate 11 to rotate, adjusting welding positions, respectively starting a first welding head 23 and a second welding head 33, setting the power of the first welding head 23 to W1, setting the power of the second welding head 33 to W2, and setting the power of the first welding head 23 to W2 after three secondsW1, when a pair of electric telescopic push rods 15 act at the same time, the platform plate 11 and the first welding assembly 2 and the second welding assembly 3 on the platform plate can be driven to move up and down to finish welding of vertical welding seams, the retraction speed of the electric telescopic push rods 15 is the welding travelling speed of the first welding head 23 and the second welding head 33, and the speed is controlled to be v;
after the welding is finished, the first welding head 23 and the second welding head 33 are closed, the rotating motor 13 acts, the turntable 14 drives the pair of electric telescopic push rods 15 to rotate, meanwhile, the platform plate 11 drives the first welding assembly 2 and the second welding assembly 3 which are arranged on the turntable to rotate, the first welding head 23 and the second welding head 33 are well adjusted to be aligned with the other non-welded side, and the welding of the other side is repeatedly finished;
after the welding seam of the bending joint of the frame of the welded battery box body 100 is completed, the electric device hanging plate 101 on the side plate of the welded battery box body 100 is welded, the welding automatic controller 4 controls the welding platform assembly 1 to act, so that the first welding assembly 2 and the second welding assembly 3 are symmetrically positioned at any positions on the inner side and the outer side of the reserved gap of the electric device hanging plate of the battery box body 100 respectively, the electric device hanging plate 101 is assembled and fixed at the reserved gap, the welding automatic controller 4 controls the welding platform assembly 1 and the first welding assembly 2 to finish the outer side welding of the electric device hanging plate 101 under the combined action, then the first welding assembly 2 is closed, the welding platform assembly 1 acts reversely, the second welding assembly 3 is started, and the inner side welding of the electric device hanging plate 101 is completed.
The time required in the whole welding process is 2/3 of that of the traditional single-side welding mode, and the welding seam has high strength and attractive appearance.
The above embodiments are not intended to limit the scope of the present invention, and therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (5)
1. A new energy automobile battery box arc welding process is characterized in that: arc welding is carried out on the battery box body (100) by adopting a laser arc welding composite welding device, wherein the laser arc welding composite welding device comprises a welding platform assembly (1), a first welding assembly (2), a second welding assembly (3) and a welding automatic controller (4);
the welding platform assembly (1) comprises a rotary lifting mechanism and a platform plate (11), wherein the top of the rotary lifting mechanism is fixed at the top of a factory building and is positioned right above the battery box body (100), and the platform plate (11) is arranged at the bottom movable part of the rotary lifting mechanism and moves along with the movable part;
the first welding assembly (2) and the second welding assembly (3) are respectively connected below the welding platform assembly (1), the first welding assembly (2) is positioned at the outer side of a part to be welded of the battery box body (100), and the second welding assembly (3) is positioned at the inner side of the part to be welded of the battery box body (100);
the automatic welding controller (4) respectively controls the actions of the electric actuators of the welding platform assembly (1), the first welding assembly (2) and the second welding assembly (3);
the arc welding process of the battery box comprises the following steps:
step 1, welding a welding seam at a bending joint of a frame of a battery box body (100), controlling a welding platform assembly (1) to act by a welding automatic controller (4), enabling a first welding assembly (2) and a second welding assembly (3) to be respectively positioned at the bottoms of the inner side and the outer side of the bending joint of the battery box body (100), enabling a welding gun of the first welding assembly (2) to be lower than that of the second welding assembly (3) by 3-5mm, enabling the first welding assembly (2) and the second welding assembly (3) to be started simultaneously, completing the whole welding seam from bottom to top, and enabling the welding platform assembly (1) to act to adjust the positions of the first welding assembly (2) and the second welding assembly (3) to sequentially complete four welding seams;
step 2, welding an electric device hanging plate (101) on a side plate of a battery box body (100), controlling a welding platform assembly (1) to act by a welding automatic controller (4), enabling a first welding assembly (2) and a second welding assembly (3) to be symmetrically positioned at any inner side and outer side of a reserved gap of the electric device hanging plate of the battery box body (100), assembling and fixing the electric device hanging plate (101) at the reserved gap, completing outer side welding of the electric device hanging plate (101) under the combined action of the welding automatic controller (4) controlling the welding platform assembly (1) and the first welding assembly (2), closing the first welding assembly (2), reversely acting by the welding platform assembly (1), and starting the second welding assembly (3) to complete inner side welding of the electric device hanging plate (101);
setting the rated welding power of the first welding component (2) as W1, the rated welding power of the second welding component (3) as W2 and the highest welding travelling speed as v; the highest welding travelling speeds of the first welding component (2) and the second welding component (3) are v;
in the step 1, the welding automatic controller (4) controls the welding power of the first welding component (2) to be W1 three seconds before welding and three seconds after weldingW1, the welding traveling speed is v, the welding power of the second welding assembly (3) is W2, and the welding traveling speed is v;
in step 2, the welding automatic controller (4) The welding power of the first welding component (2) is controlled to be W1, the welding power of the second welding component (3) is controlled to be W2, and the welding travelling speeds are allv；
The first welding assembly (2) comprises a first connecting rod (21), a head shaking device (22) and a first welding head (23), one end of the first connecting rod (21) is connected below the welding platform assembly (1), the head shaking device (22) is arranged at the other end of the first connecting rod (21), and the first welding head (23) is arranged at a movable part of the head shaking device (22), swings up and down along with the movable part and faces the outer side of a part to be welded of the battery box body (100);
the second welding assembly (3) comprises a second connecting rod (31), a welding head connecting block (32) and a second welding head (33), one end of the second connecting rod (31) is connected below the welding platform assembly (1), the welding head connecting block (32) is arranged at the other end of the second connecting rod (31), and the second welding head (33) is arranged at the welding head connecting block (32) and faces the inner side of a part to be welded of the battery box body (100);
the welding platform assembly further comprises a pair of electric linear guide rails (5), the linear rails of the electric linear guide rails (5) are fixed below the welding platform assembly (1), and one ends of the first connecting rod (21) and the second connecting rod (31) are respectively connected to the sliding blocks of the pair of electric linear guide rails (5) and move along with the sliding blocks.
2. The arc welding process for the battery box of the new energy automobile according to claim 1, wherein the arc welding process is characterized in that:
the rotary lifting mechanism comprises a base plate (12), a rotary motor (13), a rotary table (14) and a pair of electric telescopic pushing rods (15), wherein the upper surface of the base plate (12) is fixed at the top of a factory building, a casing of the rotary motor (13) is fixed on the lower surface of the base plate (12), the upper surface of the rotary table (14) is connected with the end part of a rotating shaft of the rotary motor (13), one ends of the pair of electric telescopic pushing rods (15) are connected with the lower surface of the rotary table (14), and the upper surface of the platform plate (11) is connected with the other ends of the pair of electric telescopic pushing rods (15).
3. The arc welding process for the battery box of the new energy automobile according to claim 1, wherein the arc welding process is characterized in that:
the first welding head (23) is a laser welding head and the second welding head (33) is an arc welding head.
4. The arc welding process for the battery box of the new energy automobile according to claim 1, wherein the arc welding process is characterized in that:
the first welding assembly (2) and the second welding assembly (3) are respectively in a pair, are symmetrically connected below the welding platform assembly (1), and when the first welding assembly (2) and the second welding assembly (3) are simultaneously started, two battery box body (100) frames at symmetrical positions are simultaneously bent and welded at the joint.
5. The arc welding process for the battery box of the new energy automobile according to claim 1, wherein the arc welding process is characterized in that:
the welding robot (4) is a microcontroller-based circuit board.
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