CN110181188B - Ultra-long aluminum alloy cabin door butt joint process - Google Patents
Ultra-long aluminum alloy cabin door butt joint process Download PDFInfo
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- CN110181188B CN110181188B CN201910490234.1A CN201910490234A CN110181188B CN 110181188 B CN110181188 B CN 110181188B CN 201910490234 A CN201910490234 A CN 201910490234A CN 110181188 B CN110181188 B CN 110181188B
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- 210000001503 joint Anatomy 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 50
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 40
- 230000008569 process Effects 0.000 title claims abstract description 37
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 53
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000003466 welding Methods 0.000 claims abstract description 43
- 239000003292 glue Substances 0.000 claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
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- 238000002360 preparation method Methods 0.000 claims abstract description 5
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- 230000002787 reinforcement Effects 0.000 abstract description 3
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
- F16B11/006—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
Abstract
The invention discloses a butt joint process of an ultra-long aluminum alloy cabin door, which comprises the following steps: s1: early preparation: cleaning the surface of the butt joint; s2: and (3) butt joint positioning of cabin doors: adjusting and fixing the butt joint position of the two aluminum alloy cabin doors; s3: back welding connection: welding the butt joint of the surfaces of the skins at the back sides of the two cabin doors; s4: bonding an aluminum plate on the back: bonding an aluminum plate at the butt joint of the surfaces of the skins at the back sides of the two cabin doors; s5: front side seam glue filling: filling gap filling glue in the butt joint gap on the front sides of the two cabin doors; s6: quality inspection: and (5) inspecting the product quality according to the product production process. According to the invention, two doors with conventional sizes are butted into a whole by implementing the processes of spot welding, glue filling, reinforcement and the like, so that the manufacturing of the ultra-long aluminum alloy door is realized, the technical problem that the existing blanking equipment for passenger car production cannot meet the blanking of ultra-large aluminum alloy skins is well solved, and the method plays an important role in meeting the special market of passenger cars.
Description
Technical Field
The invention relates to the technical field of automobile manufacturing, in particular to a process for butting overlong aluminum alloy cabin doors.
Background
The automobile is the most widely used vehicle, and environmental protection, energy and safety are three major topics for automobile development. To solve these three problems, modern automobiles are developing in a direction of light weight, high speed, safety, comfort, low cost, low emission, and energy saving. The most effective way to meet the above requirements is to reduce the dead weight of the automobile. Aluminum and its alloy processing materials are the most ideal materials for realizing light weight of automobiles due to a series of excellent characteristics of small density, high specific strength, good impact resistance, corrosion resistance, good processing formability, extremely high recyclability, recyclability and the like. At present, the cabin door of the passenger car is made of aluminum alloy materials basically, and the processing technology of the cabin door is mature.
Along with the continuous change of market demands, if international markets such as Israel generally demand the ultra-long aluminum alloy cabin door, the length of the traditional cabin door is 0.5 to 2 meters, the ultra-long aluminum alloy cabin door is close to 4 meters, and the existing passenger car production blanking equipment cannot meet the integral blanking production of the ultra-large aluminum alloy skin. In order to meet market demands, various passenger car manufacturers actively research manufacturing methods and processes of ultra-long aluminum alloy doors.
Therefore, it is desirable to provide a process for butting an ultra-long aluminum alloy hatch door to solve the above problems.
Disclosure of Invention
The invention aims to solve the technical problem of providing a process for butting an ultra-long aluminum alloy cabin door, wherein two cabin doors with conventional sizes are butted into a whole by implementing process methods such as spot welding, glue filling, reinforcing and the like, so that the ultra-long aluminum alloy cabin door is manufactured.
In order to solve the technical problems, the invention adopts a technical scheme that: the provided ultra-long aluminum alloy cabin door butt joint process comprises the following steps:
s1: early preparation: cleaning the surfaces of the back skin butt joint parts of the two aluminum alloy cabin doors to be butted;
s2: and (3) butt joint positioning of cabin doors: adjusting and fixing the butt joint position of the two aluminum alloy cabin doors;
s3: back welding connection: welding the butt joint of the surfaces of the skins at the back sides of the two cabin doors to finish primary connection;
s4: bonding an aluminum plate on the back: bonding an aluminum plate at the butt joint of the surfaces of the skins at the back sides of the two cabin doors to complete secondary connection;
s5: front side seam glue filling: after the bonding is finished, the cabin doors are turned over, and gap filling glue is filled in the butt joint gap on the front sides of the two cabin doors to finish the final connection;
s6: quality inspection: and after the two cabin doors are butted, checking the product quality according to the product production process.
Further, the specific method of step S2 includes the following steps:
s2.1: placing two aluminum alloy cabin doors to be butted on a butting platform according to the butting pose, enabling the surface of a skin on the back of the cabin doors to face upwards, and aligning the edges of the side parts of the cabin doors with positioning bosses on the edges of the top surfaces of the butting platform;
s2.2: one cabin door is fixed on the butt joint platform through a clamping tool, and a cushion block is arranged between the two cabin doors, so that the side surface of the cushion block is attached to the butt joint surface of the cabin door;
s2.3: and moving the other cabin door along the length direction of the positioning boss to enable the butt joint surface of the cabin door to be attached to the other side surface of the cushion block, and fixing the cabin door on the butt joint platform through a clamping tool.
Furthermore, the thickness of the cushion block is 1-5 mm, and the height of the cushion block is smaller than the height of the two cabin doors.
Furthermore, the length of the cushion block is greater than that of the joint of the two doors, and the end part of the cushion block is positioned outside the joint of the two doors.
Further, after the two doors are welded and connected in the step S3, the welding position is polished and leveled.
Further, the specific method of step S4 includes the following steps:
1) cleaning the surfaces of the welding positions of the skins of the two cabin doors and the bonding surface of the aluminum plate;
2) marking the surfaces of two sides of the welding position of the cabin door skin as bonding positioning lines of the aluminum plate so as to determine the bonding position of the aluminum plate;
3) uniformly coating a bonding agent on the bonding surface of the aluminum plate through a glue gun, then attaching the bonding surface of the aluminum plate to the surface of the welding position of the two cabin door skins to ensure that the aluminum plate is positioned at the bonding position, and applying pressure to bond the aluminum plate and the two cabin door skins
4) And after the adhesive is cured, removing the adhesive overflowing from the joint of the aluminum plate and the cabin door skin, and sealing the joint along the edge of the aluminum plate.
Further, the aluminum plate is a long-strip rectangular plate, the length of the rectangular plate is equal to the length of the butt joint gap of the two cabin doors, the width of the rectangular plate is larger than the width of the butt joint gap, and the thickness of the rectangular plate is 2-4 mm.
Further, the specific method of step S5 includes the following steps:
s5.1: overturning the cabin door bonded with the aluminum plate and fixing the cabin door on the butt joint platform through a clamping tool so that the aluminum plate is positioned below the butt joint gap;
s5.2: removing the cushion block, and bonding adhesive tape paper at two ends of the butt joint gap;
s5.3: filling gap filling glue in the butt joint gap through a glue gun to enable the gap filling glue to fill the gap of the joint;
s5.4: and after the joint filling glue is cured, tearing off the adhesive tape, and polishing the cured joint filling glue to enable the cured joint filling glue to be flush with the surface of the skin on the front side of the cabin door.
The invention has the following beneficial effects:
1. according to the invention, two doors with conventional sizes are butted into a whole, so that the manufacture of an ultra-long aluminum alloy door is realized, the technical problem that the existing blanking equipment for passenger car production cannot meet the blanking of ultra-large aluminum alloy skins is well solved, and the special-size aluminum alloy door plays an important role in meeting the special market of passenger cars;
2. according to the invention, by combining the processes of spot welding, glue filling, reinforcement and the like, the two butted aluminum alloy doors are firmly and reliably connected, and the overlong aluminum alloy door formed after butting has good strength performance and meets the process and use requirements.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention;
FIG. 2 is a schematic view of the butt-joint positioning state of two hatches;
FIG. 3 is a schematic view and a corresponding cross-sectional view of a spot-welded connection state of a butt seam of two hatches;
FIG. 4 is a schematic view and a corresponding cross-sectional view of a state where aluminum plates are bonded to a butt joint gap between two hatches;
FIG. 5 is a schematic view and a corresponding cross-sectional view of a butt seam between two hatches filled with gap-filling glue;
in the figure: 1, 2 and 3 butt-joint platforms of a first cabin door, a second cabin door, 31 positioning bosses, 32 clamping tools, 4 cushion blocks, 5 filling welding seams, 6 aluminum plates, 7 binders, 8 sealants and 9 joint filling glue.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Aiming at the ultra-long aluminum alloy cabin door required by special market, the invention is manufactured by butting two cabin doors with conventional sizes into a whole by implementing the process methods of spot welding, glue filling, reinforcement and the like. In this embodiment, a process of jointing and splicing an aluminum alloy door (hereinafter referred to as door one) with a length of 1580mm and an aluminum alloy door (hereinafter referred to as door two) with a length of 2107mm to form an integral door in a side wall of a passenger car is taken as an example for detailed description.
Referring to fig. 1, a process for butting an ultra-long aluminum alloy cabin door comprises the following steps:
s1: early preparation: cleaning the surfaces of the butted parts of the skins at the back surfaces of the two aluminum alloy cabin doors to be butted, and selecting and using objects such as a binder, a sealant, a joint filling glue and the like required by butting;
in the preparation stage, the surfaces of the skeletons and the skins of the two cabin doors are treated by an electrophoresis process, so that the bonding surface is provided with an electrophoresis coating. When the adhesive glue, the adhesion primer and the cleaning agent are used for bonding the cabin door skin, the bonding and strength tests are required to pass. In the embodiment, by combining the factors such as the temperature condition and the use environment of the vehicle sale and use area, the adhesive is epoxy resin AB glue, the tackifying primer is ZA-7321 type, the joint filling glue is epoxy resin joint filling glue, the cleaning agent is industrial alcohol, and the sealant is universal elastic sealant, according to the test method specified by the national standard GB7124-1986, the test proves that the adhesive strength meets the process requirements.
The tools required for butt joint mainly comprise: butt-joint platform and supporting clamping frock, operation special lifting device, glue rifle, polisher, marker pen, brush, ruler. The side edge of one top surface of the docking platform 3 is provided with a positioning boss 31, and the positioning boss 31 is arranged along the long direction of the docking platform 3.
S2: and (3) butt joint positioning of cabin doors: adjusting and fixing the butt joint position of the two aluminum alloy cabin doors;
the specific adjusting and fixing method comprises the following steps:
s2.1: sequentially placing a first cabin door 1 and a second cabin door 2 to be butted on a butting platform 3 according to the butting pose by a special lifting appliance, enabling the surface of a skin on the back of the cabin door to face upwards, and aligning the edge of the side part of the cabin door with a positioning boss 31 on the edge of the top surface of the butting platform 3;
s2.2: the first cabin door 1 is fixed on the butt joint platform 3 through the clamping tool 32, and the cushion block 4 is placed between the first cabin door 1 and the second cabin door 2, so that the side surface of the cushion block 4 is attached to the butt joint surface of the first cabin door 1;
s2.3: and moving the second hatch door 2 along the length direction of the positioning boss 31 to enable the butt joint surface of the second hatch door 2 to be attached to the other side surface of the cushion block 4, and fixing the second hatch door 2 on the butt joint platform 3 through a clamping tool 32, as shown in fig. 2.
The cushion block 4 is a long strip-shaped plate, the thickness of the cushion block is 3mm, the bottom surface of the cushion block 4 abuts against the top surface of the butt joint platform 3, and the height of the cushion block is smaller than that of the first cabin door 1/the second cabin door 2, so that a butt joint gap with the distance of 3mm is formed between the first cabin door 1 and the second cabin door 2. The butt joint gap has two functions: firstly, the integral length of the two cabin doors is increased, and the requirement of the integral length of the ultra-long aluminum alloy cabin door is met; and secondly, subsequent welding seam formation and filling of joint filling glue are facilitated, and the requirement on the connection strength of the two cabin doors is met. Meanwhile, the length of the cushion block 4 is greater than that of the butt joint gap, and the end part of the cushion block is positioned outside the butt joint gap, so that the cushion block 4 can be conveniently taken out after the first cabin door 1 and the second cabin door 2 are in butt joint.
Furthermore, the surface shape of the positioning boss 31 on the edge of the top surface of the docking platform 3 is matched with the surface shape of the side edge of the two hatches for positioning, so that the two hatches can be quickly positioned on the docking platform 3, and the working efficiency is improved.
Preferably, the clamping tool 32 adopts a common gantry type pneumatic clamping structure, the clamping part adopts a flexible rubber material, the whole structure is simple, the action is fast, the manufacturing cost is low, and the surface of the cabin door cannot be damaged.
S3: back welding connection: welding the butt joint of the surfaces of the skins at the back sides of the two cabin doors to finish primary connection;
when welding operation is carried out on the butt joint of the two hatches, a mode of equidistant continuous spot welding is adopted, the length of each welding spot is 5-8 mm, and the distance between every two adjacent welding spots is 190-210 mm. Through electric welding connection, the pre-positioning of the connecting positions of the two cabin doors can be ensured, the excessive welding stress and deformation generated by continuous welding can be avoided, and the subsequent polishing workload of the welding positions is reduced.
Before welding operation, the positions of welding spots are marked in advance at the back skin butt joint position of the first cabin door 1/the second cabin door 2 through a marking pen. After marking is finished, the existing welding machine is adopted to carry out spot welding operation on the butt joint of the two cabin doors. In this embodiment, a plurality of filling welds 5 are formed by continuous spot welding at equal intervals, each weld is 7mm long, and the interval between adjacent welds is 200mm, as shown in fig. 3.
After spot welding connection, the metal to be welded is cooled, and the welding seam of the welding part is polished and leveled by a polisher so as to ensure the smoothness of the surface of the cabin door skin and facilitate subsequent bonding of the aluminum plate 6.
S4: bonding an aluminum plate on the back: bonding an aluminum plate 6 at the butt joint of the surfaces of the skins at the back sides of the two cabin doors to complete secondary connection;
the method comprises the following steps:
s4.1: cleaning the surfaces of the welding parts of the skins of the two cabin doors and the bonding surface of the aluminum plate 6 by using cotton cloth dipped with industrial alcohol;
s4.2: marking lines on the surfaces of the two sides of the welding position of the cabin door skin by using a marking pen and a ruler to serve as bonding positioning lines of the aluminum plate 6 so as to determine the bonding position of the aluminum plate 6; and (4) coating a tackifying primer on the bonding position, and naturally airing.
S4.3: the adhesive 7 was uniformly applied on the bonding surface of the aluminum plate 6 by a glue gun as shown by wavy lines in fig. 4. And then, the bonding surface of the aluminum plate 6 is attached to the surface of the welding position of the two cabin door skins, so that the aluminum plate 6 is positioned at the bonding position, and certain pressure is applied to maintain the bonding position. The time interval from the application of the adhesive 7 to the application of pressure on the aluminum plate 6 for bonding is controlled within 3 minutes, so that the phenomenon that the curing of each part of the adhesive is asynchronous and the bonding quality is influenced is prevented;
s4.4: after the adhesive is cured, the adhesive overflowing from the joint of the aluminum plate 6 and the door skin is removed, and a sealant 8 is applied to the joint along the periphery of the aluminum plate 6, as shown by the thick black line in fig. 4.
In the step S4.2, adhesive tape paper may be adhered to the two side surfaces of the welding position of the two cabin door skins to serve as the bonding positioning line of the aluminum plate 6; and (4) finishing the gluing and bonding process in the same way as the step (S4.3), tearing off adhesive tape paper after the bonding agent is cured and removing the bonding agent overflowing from the joint of the aluminum plate 6 and the cabin door skin, and then gluing the sealant 8 along the periphery of the aluminum plate 6 at the joint.
In this embodiment, the aluminum plate is a rectangular plate, the length of the rectangular plate is equal to the length of the butt joint gap between the two doors, the width of the rectangular plate is greater than the width of the butt joint gap, and the thickness of the rectangular plate is 3mm, so that the aluminum plate can completely cover the joint gap after being bonded, and has a large bonding area, thereby achieving the purpose of exquisite appearance of the doors and meeting the requirement of connection strength.
S5: front side seam glue filling: after the bonding is finished, the cabin doors are turned over, and gap filling glue 9 is filled in the butt joint gap on the front sides of the two cabin doors to finish the final connection;
the method comprises the following steps:
s5.1: overturning the cabin door bonded with the aluminum plate 6 and fixing the cabin door on the docking platform 3 again through the clamping tool 32 to enable the aluminum plate 6 to be located below the docking gap;
s5.2: removing the cushion block 3, and bonding adhesive tape paper at two ends of the butt joint gap;
s5.3: filling gap filling glue 9 in the butt joint gap by a glue gun to enable the gap filling glue 9 to fill the gap of the joint gap;
s5.4: after the joint sealant 9 is cured, the adhesive tape is torn off, and the cured joint sealant 9 is polished to be flush with the surface of the skin on the front side of the cabin door, as shown in fig. 5.
The filling gap-filling glue and the bonding aluminum plate are connected and matched with spot welding, so that the ultra-long aluminum alloy cabin door formed after the two cabin doors are in butt joint has the same strength performance with the cabin door I1/cabin door II 2, and perfect butt joint of the two cabin doors is realized.
S6: quality inspection: and after the two cabin doors are butted, checking the product quality according to the product production process.
After the ultra-long aluminum alloy cabin door is manufactured, the ultra-long aluminum alloy cabin door is packaged and warehoused if qualified after necessary appearance detection, performance detection and other detection, and is repaired or scrapped if not qualified.
Under the condition that the existing blanking equipment for passenger car production cannot meet the blanking requirement of ultra-large aluminum alloy skin, the manufacturing of the ultra-long cabin door is realized through the process method, and the method plays an important role in meeting the special market of the passenger car. The ultra-long aluminum alloy cabin door produced by the process is sold and used in Israel and other international markets, and good market benefits are obtained.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A process for butting an overlong aluminum alloy cabin door comprises the following steps:
s1: early preparation: cleaning the surfaces of the back skin butt joint parts of the two aluminum alloy cabin doors to be butted;
s2: and (3) butt joint positioning of cabin doors: adjusting and fixing the butt joint position of the two aluminum alloy cabin doors; the method comprises the following steps:
s2.1: placing two aluminum alloy cabin doors to be butted on a butting platform according to the butting pose, enabling the surface of a skin on the back of the cabin doors to face upwards, and aligning the edges of the side parts of the cabin doors with positioning bosses on the edges of the top surfaces of the butting platform;
s2.2: fixing one of the cabin doors on the butt joint platform through a clamping tool, and placing cushion blocks on the two cabin doors to enable the side surfaces of the cushion blocks to be attached to the butt joint surfaces of the cabin doors;
s2.3: moving the other cabin door along the length direction of the positioning boss to enable the butt joint surface of the cabin door to be attached to the other side surface of the cushion block, and fixing the cabin door on the butt joint platform through a clamping tool;
s3: back welding connection: welding the butt joint of the surfaces of the skins at the back sides of the two cabin doors to finish primary connection;
s4: bonding an aluminum plate on the back: bonding an aluminum plate at the butt joint of the surfaces of the skins at the back sides of the two cabin doors to complete secondary connection;
s5: front side seam glue filling: after the bonding is finished, the cabin doors are turned over, and gap filling glue is filled in the butt joint gap on the front sides of the two cabin doors to finish the final connection;
s6: quality inspection: and after the two cabin doors are butted, checking the product quality according to the product production process.
2. The process of claim 1, wherein the process comprises the following steps: the thickness of the cushion block is 1-5 mm, and the height of the cushion block is smaller than the height of the two cabin doors.
3. The process of claim 1, wherein the process comprises the following steps: the length of the cushion block is greater than that of the butt joint of the two hatchdoors, and the end part of the cushion block is positioned outside the butt joint of the two hatchdoors.
4. The process of claim 1, wherein the process comprises the following steps: and step S3, after the two cabin doors are welded and connected, polishing and flattening the welding part.
5. The process of claim 1, wherein the process comprises the following steps: the specific method of step S4 includes the steps of:
s4.1: cleaning the surfaces of the welding positions of the skins of the two cabin doors and the bonding surface of the aluminum plate;
s4.2: marking the surfaces of two sides of the welding position of the cabin door skin as bonding positioning lines of the aluminum plate so as to determine the bonding position of the aluminum plate;
s4.3: uniformly coating a bonding agent on the bonding surface of the aluminum plate by using a glue gun, then attaching the bonding surface of the aluminum plate to the surface of the welding part of the skins of the two hatchdoors, so that the aluminum plate is positioned at the bonding position, and applying pressure for bonding;
s4.4: and after the adhesive is cured, removing the adhesive overflowing from the joint of the aluminum plate and the cabin door skin, and sealing the joint along the edge of the aluminum plate.
6. The process of claim 1 or 5, wherein the process comprises the following steps: the aluminum plate is a strip rectangular plate, the length of the rectangular plate is equal to the length of the butt joint gap of the two cabin doors, the width of the rectangular plate is larger than the width of the butt joint gap, and the thickness of the rectangular plate is 2-4 mm.
7. The process of claim 5, wherein the process comprises the following steps: in step S4.3, the time interval between applying the adhesive to the aluminum plate and press-bonding is not more than 3 minutes.
8. The process of claim 1, wherein the process comprises the following steps: the specific method of step S5 includes the steps of:
s5.1: overturning the cabin door bonded with the aluminum plate and fixing the cabin door on the butt joint platform through a clamping tool so that the aluminum plate is positioned below the butt joint gap;
s5.2: removing the cushion block, and bonding adhesive tape paper at two ends of the butt joint gap;
s5.3: filling gap filling glue in the butt joint gap through a glue gun to enable the gap filling glue to fill the gap of the joint;
s5.4: and after the joint filling glue is cured, tearing off the adhesive tape, and polishing the cured joint filling glue to enable the cured joint filling glue to be flush with the surface of the skin on the front side of the cabin door.
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| CN103072635A (en) * | 2013-01-28 | 2013-05-01 | 郑州日产汽车有限公司 | Connection method for butt-joint components of side walls of van type transport vehicle |
| CN106346154A (en) * | 2015-07-17 | 2017-01-25 | 基胜工业(上海)有限公司 | Metal assembly welding method |
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