CN102717196B - Method for welding cab of vehicle - Google Patents

Method for welding cab of vehicle Download PDF

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Publication number
CN102717196B
CN102717196B CN201210164593.6A CN201210164593A CN102717196B CN 102717196 B CN102717196 B CN 102717196B CN 201210164593 A CN201210164593 A CN 201210164593A CN 102717196 B CN102717196 B CN 102717196B
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assembly
liner
welding
parts
column
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CN102717196A (en
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刘勇
何操
张渝
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Sinotruk Chengdu Wangpai Commercial Vehicle Co Ltd
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Sinotruk Chengdu Wangpai Commercial Vehicle Co Ltd
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Abstract

The invention discloses a process for welding a cab. The process comprises the following steps of: dividing the cab into primary components, secondary components, third-level components and the like according to the complex degree of parts of a vehicle body of a product, wherein the primary components comprise a floor assembly, a front wall assembly, a left side enclosure assembly, a right side enclosure assembly, a rear panel assembly, a top cover assembly, a left vehicle door assembly and a right vehicle door assembly; combining and performing point welding on the small components to form large components; and splicing and welding to form a cab assembly. By dividing the components, specialized production of product parts can be realized, the production efficiency is improved, and the quality is stable.

Description

The welding method of vehicle cab
Technical field
The present invention relates to automobile manufacture industry, be specifically related to driving cabin welding technique, especially the welding procedure of engineering vehicle cab.
Background technology
At present, to be welded field at automobile cab, common engineering car driver's cabin generally adopts and arranges weld jig assembly welding to several critical pieces such as floor assembly, left-side assembly, right side wall assembly, top cover assembly, back board assembly, front wall assembly, left-hand door assembly, right car door assemblies, then always assembly welding is spelled to vehicle body, welding sequence divides thinless, working procedure duration is unbalanced, sometimes a station will complete multiple working procedure job content, some position of product cannot welding, cause welding difficulty, production efficiency is not high, and product quality is also unstable.
The invention solves the operation occurred in above-mentioned engineering truck automobile body welding technique divides thinless, and procedures content is unbalanced, and production efficiency is not high, the technical problem of unstable product quality.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, provide a kind of driving cabin welding technique, make production efficiency higher, quality is more stable.
Consider the problems referred to above of prior art, according to an aspect disclosed by the invention, the present invention by the following technical solutions:
A welding method for vehicle cab,
The driver's cabin assembly that will weld is divided into and is made up of N level parts, N be more than or equal to 2 natural number, the wherein said driver's cabin assembly that will weld is divided into and is made up of at least two first order parts, and each N-1 level parts are divided into and are made up of at least two N level parts;
At least two N level parts are welded together, to form N-1 level parts; Repeat above-mentioned steps, to form a first order parts;
At least two first order parts are welded together, to form the part of driver's cabin assembly, then all the other first order parts is welded on described with on the part forming driver's cabin assembly; Or all first order parts are welded together, to form driver's cabin assembly.
In order to realize the present invention better, further technical scheme is:
As preferably, it is the division carried out according to the welding complexity of each parts of driver's cabin assembly that the above-mentioned driver's cabin assembly that will weld is divided into the step be made up of N level parts.
As preferably, the mode of above-mentioned welding is spot welding.
As preferably, above-mentioned first order parts comprise floor assembly, front wall assembly, left-side assembly, right side wall assembly, back board assembly, top cover assembly, left-hand door assembly and right car door assembly.
As preferably, the second level parts that described floor assembly basis divides to comprise in floor frame assembly, front floor assembly, middle floor assembly, left front column lower liner assembly, right front column lower liner assembly, left back column liner assembly in liner assembly, right back column.
As preferably, the second level parts that described front wall assembly basis divides comprise eaves outside plate under front wall liner sub-unit, wiper bracket assembly, front windshield, front wall liner lower left corner stiffener, front wall liner lower right corner stiffener and nut, bolt.
As preferably, the second level parts that described left-side assembly basis divides comprise liner assembly, left side wall exterior panel assembly on liner assembly on left front column, left back column.
As preferably, the second level parts that described right side wall assembly basis divides comprise liner assembly on liner assembly on right front column, right back column, right side wall outside plate assembly.
As preferably, the second level parts that described back board assembly basis divides comprise backboard, backboard reinforcement, air filter pipe mounting bracket assembly and weld bolt.
As preferably, the second level parts that described top cover assembly basis divides comprise liner assembly on front windshield, top cover reinforcement assembly, top cover, ceiling mounting bracket; The second level parts that described left-hand door assembly basis divides comprise left-hand door inner panel assembly and left-hand door outside plate assembly; The second level parts that described right car door assembly basis divides comprise right inner plate of car door assembly and right door skin assembly.
The present invention can also be:
As preferably, the second level parts that described front wall assembly basis divides comprise eaves outside plate under front wall liner sub-unit, wiper bracket assembly, front windshield, front wall liner lower left corner stiffener, front wall liner lower right corner stiffener and nut, bolt; The second level parts that described left-side assembly basis divides comprise liner assembly, left side wall exterior panel assembly on liner assembly on left front column, left back column; The second level parts that described right side wall assembly basis divides comprise liner assembly on liner assembly on right front column, right back column, right side wall outside plate assembly; The second level parts that described back board assembly basis divides comprise backboard, backboard reinforcement, air filter pipe mounting bracket assembly and weld bolt; The second level parts that described top cover assembly basis divides comprise liner assembly on front windshield, top cover reinforcement assembly, top cover, ceiling mounting bracket; The second level parts that described left-hand door assembly basis divides comprise left-hand door inner panel assembly and left-hand door outside plate assembly; The second level parts that described right car door assembly basis divides comprise right inner plate of car door assembly and right door skin assembly;
Comprise the following steps in above-mentioned technique:
Steps A: respectively to liner sub-unit assembly welding in liner sub-unit, right back column in floor frame sub-unit, front floor sub-unit, middle floor sub-unit, left front column lower liner sub-unit, right front column lower liner sub-unit, left back column, then assembly welding becomes floor assembly;
Step B: respectively to eaves outside plate, front wall liner lower left corner stiffener, front wall liner lower right corner stiffener and nut, bolt assembly welding under front wall liner sub-unit, wiper bracket assembly, front windshield, then assembly welding becomes front wall liner assembly;
Step C: respectively to liner assembly, left side wall exterior panel assembly assembly welding on liner assembly, left back column on left front column, then assembly welding becomes left-side assembly;
Step D: respectively to liner assembly, right side wall outside plate assembly assembly welding on liner assembly, right back column on right front column, then assembly welding becomes right side wall assembly;
Step e: respectively to backboard, backboard reinforcement, air filter pipe mounting bracket assembly and weld bolt assembly welding, then assembly welding becomes back board assembly;
Step F: respectively to liner assembly, top cover reinforcement assembly, top cover, ceiling mounting bracket assembly welding on front windshield, then assembly welding becomes top cover assembly;
Step G: to left-hand door inner panel assembly assembly welding, then become left-hand door assembly with left-hand door inner panel assembly, left-hand door outside plate assembly assembly welding;
Step H: to right inner plate of car door assembly assembly welding, then become right car door assembly with right inner plate of car door assembly, right door skin assembly assembly welding;
Step I: successively floor assembly, front wall assembly, left-side assembly, right side wall assembly, back board assembly, top cover assembly are always spelled, then point is welded into driver's cabin assembly;
Step J: left-hand door assembly, right car door assembly are installed on driver's cabin assembly.
Compared with prior art, one of beneficial effect of the present invention is:
In technical scheme of the present invention, be divided into one-level parts, secondary parts, three grades of parts etc. respectively according to the complexity of product vehicle body parts, another mistake is to widget combined spot being welded into large parts, and last total welding is connected into driver's cabin assembly.Such subdivided piece, is conducive to product component specialization in production, and be conducive to enhancing productivity, quality is more stable.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Consider that the operation occurred in engineering truck automobile body welding technique divides thinless, procedures content is unbalanced, production efficiency is not high, the technical problem of unstable product quality, the present invention discloses an a kind of embodiment of driving cabin welding technique, divide step by step, the driver's cabin assembly that weld is divided into multiple parts by described division step by step step by step, and the parts after described division step by step comprise:
A welding method for vehicle cab,
The driver's cabin assembly that will weld is divided into and is made up of N level parts, N be more than or equal to 2 natural number, the wherein said driver's cabin assembly that will weld is divided into and is made up of at least two first order parts, and each N-1 level parts are divided into and are made up of at least two N level parts;
At least two N level parts are welded together, to form N-1 level parts; Repeat above-mentioned steps, along with the change of N, when N equals 2, to form a first order parts;
At least two first order parts are welded together, to form the part of driver's cabin assembly, then all the other first order parts is welded on described with on the part forming driver's cabin assembly; Or all first order parts are welded together, to form driver's cabin assembly.
For the present embodiment, suppose that N equals 5, so, first at least two the 5th grade of parts are welded together, to form the 4th grade of parts; Again at least two the 4th grade of parts are welded together, to form 3rd level parts; Repeat the step that above-mentioned N successively decreases gradually, and finally can form a first order parts; All first order parts are welded together, to form driver's cabin assembly.If when N is other numeral, those of ordinary skill in the art can well implement equally, repeat no more this.
According to a disclosed embodiment above, be divided into first order parts, second level parts, third level parts etc. according to product vehicle body parts, all large parts, to widget being welded into large parts, are finally always welded into driver's cabin assembly by another mistake again.Such subdivided piece, is conducive to product component specialization in production, and be conducive to enhancing productivity, quality is more stable.
In addition, the driving cabin welding technique in the present embodiment is mainly used in the driving cabin welding field of engineering truck, and this is not the restriction to present specification certainly, and the driving cabin welding for other also can be gone.
Another embodiment of driving cabin welding technique of the present invention, described division is step by step the division carried out according to the welding complexity of each parts of driver's cabin assembly.The present embodiment is the preferred embodiment implemented on the basis of above-described embodiment, those of ordinary skill in the art, except can welding according to each parts complexity of driver's cabin assembly, also can need to be divided by other standard according to the welding of reality.
Another embodiment of driving cabin welding technique of the present invention, the mode of described welding is spot welding.Here the spot welding mentioned refers to the welding carried out with special mash welder, and as the model or specification etc. of mash welder, those of ordinary skill in the art are easy to obtain, and repeat no more this.
In following enforcement, the assembly welding that may relate to refers to and is welded together by least two parts/objects, and the mode of welding is also spot welding; Total welding that may relate to, also refers to and is welded together by least two parts/objects, and the mode of welding is also spot welding.
Another embodiment of driving cabin welding technique of the present invention, described first order parts comprise floor assembly, front wall assembly, left-side assembly, right side wall assembly, back board assembly, top cover assembly, left-hand door assembly and right car door assembly.Be that those of ordinary skill in the art know usually with upper-part, it is worth mentioning that above is enumerate one of institute's divided parts.
Another embodiment of driving cabin welding technique of the present invention, the second level parts that described floor assembly basis divides to comprise in floor frame assembly, front floor assembly, middle floor assembly, left front column lower liner assembly, right front column lower liner assembly, left back column liner assembly in liner assembly, right back column.Those of ordinary skill in the art, according to technical scheme disclosed by the invention, after carrying out two-stage division to twice driver's cabin assembly, just can realize object of the present invention, and can expect easily carrying out third time or dividing for the 4th time.In order to illustrate more fully, such as, right vertical beam assembly can comprise, connector assembly, right vertical beam liner assembly, right back mud guard installation assembly, right vertical beam sub-unit, off-front wheel mud guard and right vertical beam front connector after right vertical beam.Left longeron assembly can comprise, connector assembly, left longeron liner assembly, left back mud guard installation assembly, left longeron sub-unit, the near front wheel mud guard and left longeron front connector after left longeron.Front ground front edge of board stiffener assembly can comprise, front ground front edge of board stiffener, left headlight bracket assembly, right headlight bracket assembly and nutplate assembly.Floor tie-beam assembly can comprise, floor tie-beam sub-unit, floor tie-beam stiffener assembly and rear support assembly.
Another embodiment of driving cabin welding technique of the present invention, the second level parts that described front wall assembly basis divides comprise eaves outside plate under front wall liner sub-unit, wiper bracket assembly, front windshield, front wall liner lower left corner stiffener, front wall liner lower right corner stiffener and nut, bolt.Those of ordinary skill in the art, according to technical scheme disclosed by the invention, after carrying out two-stage division to twice driver's cabin assembly, just can realize object of the present invention, and can expect easily carrying out third time or dividing for the 4th time.In order to illustrate more fully, such as, front wall liner sub-unit can comprise, front wall liner, rain shaving electrical machine stiffener and welded nut.Wiper bracket assembly can comprise, eaves liner, left wiper arm stiffener and right wiper arm stiffener under front windshield.
Another embodiment of driving cabin welding technique of the present invention, the second level parts that described left-side assembly basis divides comprise liner assembly, left side wall exterior panel assembly on liner assembly on left front column, left back column.Those of ordinary skill in the art, according to technical scheme disclosed by the invention, after carrying out two-stage division to twice driver's cabin assembly, just can realize object of the present invention, and can expect easily carrying out third time or dividing for the 4th time.In order to illustrate more fully, such as, left side wall exterior panel assembly can comprise, and left front column hinge stiffening plate assembly, left top cover wind scooper installing plate assembly, left-hand door frame snap close install stiffener assembly, left side wall exterior panel, the second weld bolt and antenna fixing seat.On left front column, liner assembly can comprise, handle installing plate in liner sub-unit, the left joint of front wall liner and left front column on left front column.On left back column, liner assembly can comprise, liner and the first mounting nuts plate on assembly, left back column in sinistral safety band upper bracket installing plate assembly, left-side liner.
Another embodiment of driving cabin welding technique of the present invention, the second level parts that described right side wall assembly basis divides comprise liner assembly on liner assembly on right front column, right back column, right side wall outside plate assembly.Those of ordinary skill in the art, according to technical scheme disclosed by the invention, after carrying out two-stage division to twice driver's cabin assembly, just can realize object of the present invention, and can expect easily carrying out third time or dividing for the 4th time.In order to illustrate more fully, such as, right side wall outside plate assembly can comprise, and right front column hinge stiffening plate assembly, right top cover wind scooper installing plate assembly, right doorframe snap close install stiffener assembly, right side wall outside plate, the second weld bolt and the second air filter pipe mounting bracket assembly.On right front column, liner assembly can comprise, handle installing plate in liner sub-unit, the left joint of front wall liner, right front column on right front column.On right back column, liner assembly can comprise, liner and the second mounting nuts plate on assembly, right back column in dextral safety band upper bracket installing plate assembly, right side wall liner.
Another embodiment of driving cabin welding technique of the present invention, the second level parts that described back board assembly basis divides comprise backboard, backboard reinforcement, air filter pipe mounting bracket assembly and weld bolt.Those of ordinary skill in the art, according to technical scheme disclosed by the invention, after carrying out two-stage division to twice driver's cabin assembly, just can realize object of the present invention, and can expect easily carrying out third time or dividing for the 4th time.In order to illustrate more fully, such as,
Another embodiment of driving cabin welding technique of the present invention, the second level parts that described top cover assembly basis divides comprise liner assembly on front windshield, top cover reinforcement assembly, top cover, ceiling mounting bracket; The secondary parts that described left-hand door assembly basis divides comprise left-hand door inner panel assembly and left-hand door outside plate assembly; The secondary parts that described right car door assembly basis divides comprise right inner plate of car door assembly and right door skin assembly.Those of ordinary skill in the art, according to technical scheme disclosed by the invention, after carrying out two-stage division to twice driver's cabin assembly, just can realize object of the present invention, and can expect easily carrying out third time or dividing for the 4th time.In order to illustrate more fully, such as, on front windshield, liner assembly can comprise, liner and the first welded nut on front windshield.Top cover reinforcement assembly can comprise, top cover reinforcement, 2 M6 welded nuts and 2 M5 welded nuts.
Another embodiment of driving cabin welding technique of the present invention, the second level parts that described front wall assembly basis divides comprise eaves outside plate under front wall liner sub-unit, wiper bracket assembly, front windshield, front wall liner lower left corner stiffener, front wall liner lower right corner stiffener and nut, bolt; The secondary parts that described left-side assembly basis divides comprise liner assembly, left side wall exterior panel assembly on liner assembly on left front column, left back column; The secondary parts that described right side wall assembly basis divides comprise liner assembly on liner assembly on right front column, right back column, right side wall outside plate assembly; The secondary parts that described back board assembly basis divides comprise backboard, backboard reinforcement, air filter pipe mounting bracket assembly and weld bolt; The secondary parts that described top cover assembly basis divides comprise liner assembly on front windshield, top cover reinforcement assembly, top cover, ceiling mounting bracket; The secondary parts that described left-hand door assembly basis divides comprise left-hand door inner panel assembly and left-hand door outside plate assembly; The secondary parts that described right car door assembly basis divides comprise right inner plate of car door assembly and right door skin assembly;
Comprise the following steps in above-mentioned technique:
Steps A: respectively to liner sub-unit assembly welding in liner sub-unit, right back column in floor frame sub-unit, front floor sub-unit, middle floor sub-unit, left front column lower liner sub-unit, right front column lower liner sub-unit, left back column, then assembly welding becomes floor assembly;
Step B: respectively to eaves outside plate, front wall liner lower left corner stiffener, front wall liner lower right corner stiffener and nut, bolt assembly welding under front wall liner sub-unit, wiper bracket assembly, front windshield, then assembly welding becomes front wall liner assembly;
Step C: respectively to liner assembly, left side wall exterior panel assembly assembly welding on liner assembly, left back column on left front column, then assembly welding becomes left-side assembly;
Step D: respectively to liner assembly, right side wall outside plate assembly assembly welding on liner assembly, right back column on right front column, then assembly welding becomes right side wall assembly;
Step e: respectively to backboard, backboard reinforcement, air filter pipe mounting bracket assembly and weld bolt assembly welding, then assembly welding becomes back board assembly;
Step F: respectively to liner assembly, top cover reinforcement assembly, top cover, ceiling mounting bracket assembly welding on front windshield, then assembly welding becomes top cover assembly;
Step G: to left-hand door inner panel assembly assembly welding, then become left-hand door assembly with left-hand door inner panel assembly, left-hand door outside plate assembly assembly welding;
Step H: to right inner plate of car door assembly assembly welding, then become right car door assembly with right inner plate of car door assembly, right door skin assembly assembly welding;
Step I: floor assembly, front wall assembly, left-side assembly, right side wall assembly, back board assembly, top cover assembly are welded as driver's cabin assembly; Can be successively floor assembly, front wall assembly, left-side assembly, right side wall assembly, back board assembly, top cover assembly are always spelled, then point be welded into driver's cabin assembly; Here the total spelling mentioned carries out assembled to the parts mentioned in this step, in welding after assembled.
Step J: left-hand door assembly, right car door assembly are installed on driver's cabin assembly.
Being worth mentioning in the present embodiment, is not the restriction to sequencing in A to J step in above technique, and those of ordinary skill in the art the order to step can do some suitable adjustment according to actual conditions and spirit disclosed in this invention.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, identical similar portion cross-reference between each embodiment.
Spoken of in this manual " embodiment ", " another embodiment ", " embodiment ", etc., refer to the specific features, structure or the feature that describe in conjunction with this embodiment and be included at least one embodiment of the application's generality description.Multiple place occurs that statement of the same race is not necessarily refer to same embodiment in the description.Furthermore, when describing specific features, structure or a feature in conjunction with any embodiment, what advocate is also fall within the scope of the invention to realize this feature, structure or feature in conjunction with other embodiments.
Although with reference to multiple explanatory embodiment of the present invention, invention has been described here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of, accompanying drawing open in the application and claim, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the modification of carrying out building block and/or layout is with except improvement, to those skilled in the art, other purposes also will be obvious.

Claims (1)

1. a welding method for vehicle cab, is characterized in that,
The driver's cabin assembly that will weld is divided into and is made up of N level parts, N be more than or equal to 2 natural number, the wherein said driver's cabin assembly that will weld is divided into and is made up of at least two first order parts, and each N-1 level parts are divided into and are made up of at least two N level parts;
At least two N level parts are welded together, to form N-1 level parts; Repeat above-mentioned steps, to form a first order parts;
At least two first order parts are welded together, to form the part of driver's cabin assembly, then all the other first order parts is welded on described with on the part forming driver's cabin assembly; Or all first order parts are welded together, to form driver's cabin assembly;
It is the division carried out according to the welding complexity of each parts of driver's cabin assembly that the described driver's cabin assembly that will weld is divided into the step be made up of N level parts; The mode of described welding is spot welding; Described first order parts comprise floor assembly, front wall assembly, left-side assembly, right side wall assembly, back board assembly, top cover assembly, left-hand door assembly and right car door assembly;
The second level parts that described front wall assembly basis divides comprise eaves outside plate under front wall liner sub-unit, wiper bracket assembly, front windshield, front wall liner lower left corner stiffener, front wall liner lower right corner stiffener and nut, bolt; The second level parts that described left-side assembly basis divides comprise liner assembly, left side wall exterior panel assembly on liner assembly on left front column, left back column; The second level parts that described right side wall assembly basis divides comprise liner assembly on liner assembly on right front column, right back column, right side wall outside plate assembly; The second level parts that described back board assembly basis divides comprise backboard, backboard reinforcement, air filter pipe mounting bracket assembly and weld bolt; The second level parts that described top cover assembly basis divides comprise liner assembly on front windshield, top cover reinforcement assembly, top cover, ceiling mounting bracket; The second level parts that described left-hand door assembly basis divides comprise left-hand door inner panel assembly and left-hand door outside plate assembly; The second level parts that described right car door assembly basis divides comprise right inner plate of car door assembly and right door skin assembly;
Comprise the following steps in above-mentioned technique, it according to sequencing is:
Steps A: respectively to liner sub-unit assembly welding in liner sub-unit, right back column in floor frame sub-unit, front floor sub-unit, middle floor sub-unit, left front column lower liner sub-unit, right front column lower liner sub-unit, left back column, then assembly welding becomes floor assembly;
Step B: respectively to eaves outside plate, front wall liner lower left corner stiffener, front wall liner lower right corner stiffener and nut, bolt assembly welding under front wall liner sub-unit, wiper bracket assembly, front windshield, then assembly welding becomes front wall assembly;
Step C: respectively to liner assembly, left side wall exterior panel assembly assembly welding on liner assembly, left back column on left front column, then assembly welding becomes left-side assembly;
Step D: respectively to liner assembly, right side wall outside plate assembly assembly welding on liner assembly, right back column on right front column, then assembly welding becomes right side wall assembly;
Step e: respectively to backboard, backboard reinforcement, air filter pipe mounting bracket assembly and weld bolt assembly welding, then assembly welding becomes back board assembly;
Step F: respectively to liner assembly, top cover reinforcement assembly, top cover, ceiling mounting bracket assembly welding on front windshield, then assembly welding becomes top cover assembly;
Step G: to left-hand door inner panel assembly assembly welding, then become left-hand door assembly with left-hand door inner panel assembly, left-hand door outside plate assembly assembly welding;
Step H: to right inner plate of car door assembly assembly welding, then become right car door assembly with right inner plate of car door assembly, right door skin assembly assembly welding;
Step I: floor assembly, front wall assembly, left-side assembly, right side wall assembly, back board assembly, top cover assembly are welded as driver's cabin assembly;
Step J: left-hand door assembly, right car door assembly are installed on driver's cabin assembly.
CN201210164593.6A 2012-05-24 2012-05-24 Method for welding cab of vehicle Active CN102717196B (en)

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CN104439733A (en) * 2013-09-16 2015-03-25 北汽福田汽车股份有限公司 Welding method of lower vehicle body
CN104162730B (en) * 2014-08-22 2016-04-13 中国重汽集团成都王牌商用车有限公司 Utility vehicle cab floor assembly welding procedure
CN106271161B (en) * 2016-08-31 2018-10-09 北汽舜泰(淄博)汽车有限公司 Novel electric vehicle automobile body welding method
CN109014633A (en) * 2018-06-22 2018-12-18 安徽江淮汽车集团股份有限公司 Driver's cabin white body assembly welding method
CN108857127B (en) * 2018-08-09 2021-01-22 北京长城华冠汽车科技股份有限公司 Welding method of frame type aluminum alloy car body top cover
CN109227011B (en) * 2018-08-10 2020-12-01 扬州沃盛车业制造有限公司 One-step forming process for mine car cab covering piece
CN109014639B (en) * 2018-08-20 2021-01-22 北京长城华冠汽车科技股份有限公司 Welding process for aluminum alloy front engine room assembly

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