CN113664331A - A kind of automobile chassis welding method - Google Patents
A kind of automobile chassis welding method Download PDFInfo
- Publication number
- CN113664331A CN113664331A CN202111048717.XA CN202111048717A CN113664331A CN 113664331 A CN113664331 A CN 113664331A CN 202111048717 A CN202111048717 A CN 202111048717A CN 113664331 A CN113664331 A CN 113664331A
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- welding
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- welding gun
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/02—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press ; Diffusion bonding
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
- B23K37/02—Carriages for supporting the welding or cutting element
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/28—Supporting devices for electrodes
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/006—Vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to the technical field of automobile production, in particular to a welding method of an automobile chassis, which comprises the following steps: the method comprises the following steps: the method comprises the following steps: arranging a chassis frame on the welding platform and fixing the chassis frame; step two: erecting a track for moving a welding gun during welding according to the shape of a contact gap between chassis parts, and then installing the welding gun on the track; step three: selecting welding materials and welding modes according to welding requirements, and driving a welding gun to move by using an external power source to enable the welding gun to move along a contact gap between chassis parts to complete welding of a welding seam; step four: cleaning the flux coating and the welding slag on the welding seam to complete chassis welding; the welded seam obtained after welding can be more beautiful.
Description
Technical Field
The invention relates to the technical field of automobile production, in particular to a welding method for an automobile chassis.
Background
In the existing welding, the arc striking operation of the electric arc is directly carried out at the welding position of the chassis, so that a welding beading (namely a pimple-shaped welding seam formed by piled up welding materials after the welding materials are melted) is easily left at the arc striking position, the welding quality around the welding beading is greatly reduced, and the appearance of the welded welding seam is influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the welding method of the automobile chassis, which can enable the welded seam obtained after welding to be more attractive.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method of welding an automotive chassis, the method comprising the steps of:
the method comprises the following steps: arranging a chassis frame on the welding platform and fixing the chassis frame;
step two: erecting a track for moving a welding gun during welding according to the shape of a contact gap between chassis parts, and then installing the welding gun on the track;
step three: selecting welding materials and welding modes according to welding requirements, and driving a welding gun to move by using an external power source to enable the welding gun to move along a contact gap between chassis parts to complete welding of a welding seam;
step four: and cleaning the flux coating and the welding slag on the welding seam to finish the welding of the chassis.
And further, after the welding gun is erected in the second step, the welding distance of the welding gun is adjusted according to the welding position of the chassis, then the welding material in the welding gun is in contact with the chassis to generate electric arcs, and the length of the electric arcs is controlled to be 2-3 mm.
And further, the welding mode in the third step is one or more of gas shielded arc welding, cold welding and submerged arc welding.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a process diagram of a method of welding an automotive chassis according to the present invention;
FIG. 2 is a flow chart of a method of obtaining a weld in accordance with the present invention;
FIG. 3 is a flowchart of a method for quality inspection of a weld joint according to the present invention;
FIG. 4 is a schematic view of the angle adjustment of the welding gun according to the present invention;
FIG. 5 is a schematic view of another direction of the angle adjustment of the welding gun according to the present invention;
FIG. 6 is a schematic structural view of an arc striking plate according to the present invention;
FIG. 7 is a schematic view of the construction of the bolt of the present invention;
FIG. 8 is a schematic view of the structure of the arc ignition plate moving along with the welding gun according to the present invention;
FIG. 9 is a schematic view of the structure of the present invention in which the arc striking plate is kept horizontal;
FIG. 10 is a schematic view of the structure of the impact coating of the present invention;
FIG. 11 is a schematic view of another direction of the impact coating according to the present invention;
FIG. 12 is a schematic view of the contact wheel and the friction wheel of the present invention;
FIG. 13 is a schematic view of the cam of the present invention;
fig. 14 is a schematic structural view of the welding device for the automobile chassis according to the present invention.
Detailed Description
Referring to fig. 1 and 3, the working process of the welding method for the chassis of the automobile according to the figure is as follows:
firstly, arranging a chassis frame on a welding platform and fixing the chassis frame; then erecting a track for moving a welding gun during welding according to the shape of a contact gap between chassis parts, and then installing the welding gun on the track; selecting welding materials and welding modes according to welding requirements, and driving a welding gun to move by using an external power source to move along the contact gap between chassis parts to complete welding of a welding seam; and finally, cleaning the flux coating and the welding slag on the welding seam to complete chassis welding, then carrying out quality inspection on the welding seam, entering the subsequent processing procedure after the quality inspection is qualified, and repairing and processing unqualified welding seams until the welding seam meets the requirements.
Referring to fig. 2, one exemplary operation for welding the gap between chassis parts that results from the contact shown is:
after the chassis parts are combined, erecting a welding gun in the second step, adjusting the welding distance of the welding gun according to the welding position of the chassis, selecting one or more of gas shielded arc welding, cold pressure welding and submerged arc welding according to the welding mode in the third step for welding, enabling a welding material in the welding gun to be in contact with the welding position of the chassis to generate electric arc, and completing welding of a contact gap between the chassis parts, and controlling the length of the electric arc generated at the welding position of the welding material and the chassis during welding to be 2-3 mm, so that the welding material is fused with the welding position of the chassis conveniently.
Referring to fig. 4, 6 and 8, an exemplary operation process for obtaining advanced arc ignition according to the drawings is as follows:
in the existing welding, arc striking operation of electric arc is directly carried out at the welding position of the chassis, so that welding beading (namely, a pimple-shaped welding seam formed by piled up welding materials after the welding materials are melted) is easily left at the arc striking position, the welding quality around the welding beading is greatly reduced, and the attractiveness of the welded welding seam is influenced; therefore, the welding method of the automobile chassis also uses an automobile chassis welding device which comprises a welding gun 6 and an auxiliary part, wherein the auxiliary part comprises an arc striking plate 1, a transverse frame 2 and a bolt 3, the arc striking plate 1 is in threaded connection with the bolt 3, the bolt 3 is rotationally connected to the transverse frame 2, and the transverse frame 2 is in surface contact with the arc striking plate 1, so that the welding gun 6 can strike an arc on the arc striking plate 1 during welding, and then the welding gun which successfully strikes the arc is moved to the welding position of the chassis to weld, so that a welding beading generated during arc striking is left on the arc striking plate 1 to avoid the occurrence of the welding position of the chassis; after the arc striking plate 1 is used for striking an arc once, a 'weld beading' is left, so that when the next arc striking is carried out, the bolt 3 can be used for driving the arc striking plate 1 to move on the transverse frame 2, and under the condition that the position of the welding gun 6 is not changed, the part of the arc striking plate 1 with the 'weld beading' is moved away from the lower part of the welding gun, so that the welding gun 6 can carry out the next arc striking on other positions of the arc striking plate 1 without the 'weld beading'; thereby avoiding the 'welding beading' from colliding with the welding gun and simultaneously avoiding the smooth operation of next arc striking due to the influence of the 'welding beading'.
Referring to fig. 8 and 9, an exemplary operation of moving the arc runner 1 to follow the welding gun 6 is shown:
in the prior art, when arc striking is performed in advance, a metal plate is firstly spot-welded beside a chassis welding position, the method needs to take the metal plate off after welding, which causes waste of the metal plate and causes 'welding spots' (spot welding seams formed when the metal plate is spot-welded) formed by residual welding materials beside the chassis welding position, the auxiliary part also comprises a suspender 7, a slideway 12 and a vertical rod 11, the transverse frame 2 is fixedly connected on the vertical rod 11, the slideway 12 consists of a horizontal part and an upward inclined part, the welding gun 6 is arranged in the suspender 7, a tension spring 15 is connected between the suspender 7 and the vertical rod 11, when welding, the suspender 7 only needs to drive the slideway 12 and the vertical rod 11 to move, so that the arc striking plate 1 reaches a position which is parallel to the chassis welding position, then arc striking is performed, and the welding gun 6 moves to the chassis welding position for welding after arc striking, at the moment, the arc striking plate 1 is blocked by the side surface of the welding position of the chassis, the vertical rod 11 slides in the slide way 12 along with the movement of the welding gun 6 to ensure that the welding gun 6 smoothly moves for welding, when the vertical rod 11 inclines upwards on the slide way 12, the vertical rod 11 can upwards pull the transverse frame 2 to enable the arc striking plate 1 to ascend and the ground to be in contact with the upper surface of the welding position of the chassis after the welding gun 6 is welded, then the arc striking plate 1 moves along with the continuous movement of the welding gun 6 to enable the arc striking plate 1 to follow the moving direction of the welding gun 6, after the welding gun 6 leaves the upper part of the chassis after the welding is finished, the lower surface of the arc striking plate 1 is not in contact with the chassis any more, so that under the action of the tension spring 15, the vertical rod 11 slides back to the initial position on the slide way 12 to prepare for next arc striking, the arc striking plate 1 finally moves along with the welding gun 6, when arc striking is not needed any more, the waste of metal plates and the 'welding spots' formed by residual welding materials beside the welding position of the chassis are avoided.
Referring to fig. 8 and 9, an exemplary operation for preventing the arc runner 1 from rotating is shown as follows:
because the groove 13 is formed in the slide rail 12, the telescopic rod 14 horizontally slides in the groove 13, and the telescopic rod 14 is fixedly connected to the vertical rod 11, when the welding gun 6 moves and the vertical rod 11 slides in the slide rail 12, the telescopic rod 14 on the vertical rod 11 horizontally slides in the groove 13, so that the vertical rod 11 is kept in a vertical state in the slide rail 12, the arc striking plate 1 is always kept in a horizontal state when being blocked by the side face of the welding part of the chassis, and when the vertical rod 11 slides in the upward inclined part of the slide rail 12, the same vertical rod 11 is kept vertical, so that the arc striking plate 1 is kept in a horizontal state and rises to be separated from the side face of the welding part of the chassis.
Referring to fig. 4 and 5, an exemplary process for adjusting the distance between the welding gun 6 and the chassis is shown:
when the distance between the welding gun 6 and the welding position of the chassis is adjusted, because the air cylinder 8 is arranged on the suspension rod 7, the welding gun 6 is fixedly connected to the air cylinder rod of the air cylinder 8, so that the air cylinder 8 can be used for driving the welding gun 6 to slide on the suspension rod 7, and the adjustment of the distance between the welding gun 6 and the welding position of the chassis is realized.
Referring to fig. 4 and 5, an exemplary operation of adjusting the angle of the welding gun 6 according to the present disclosure is:
according to the invention, the suspension rod 7 rotates on the suspension arm 9 in the vertical direction, and the suspension arm 9 rotates on the suspension frame 10 in the horizontal direction, so that the suspension rod 7 can be driven by a gear motor to rotate on the suspension arm 9 according to the plane after the chassis parts are assembled, and the suspension arm 9 is driven by another gear motor to rotate on the suspension frame 10 in the horizontal direction, so that the angle inclination of the welding gun 6 is realized, and the welding can be carried out by matching with the plane after the chassis parts are assembled.
Referring to fig. 6 and 7, an exemplary operation process for replacing the arc runner 1 is shown:
after carrying out many times striking on striking plate 1, need change striking plate 1, so be provided with on bolt 3 and keep off protruding 4 and be used for the cavity that fixture block 5 was hidden, be provided with the spring between fixture block 5 and the cavity, when trading striking plate 1, hold between the fingers fixture block 5, make fixture block 5 compression spring retract the cavity and hide, then alright pull out bolt 3 from the one end of horizontal frame 2, then rotate bolt 3, make bolt 3 rotate out from striking plate 1, then with trading new striking plate 1, install bolt 3 back, alright make bolt 3 rotate and can not drop on horizontal frame 2 with the restriction that keeps off protruding 4 with keeping off fixture block 5.
Referring to fig. 10-14, an exemplary procedure for removing the coating is shown:
after welding, the coating on the welding seam needs to be cleaned, the auxiliary part also comprises a contact wheel 16 and a cam 18, friction wheels 17 are arranged in the middle of the contact wheel 16 and the middle of the cam 18, the two friction wheels 17 are driven by a belt, a slide rod 19 is arranged on the vertical rod 11, and a collision block 20 is arranged on the slide rod 19, so that when the transverse frame 2 moves, the contact wheel 16 is contacted with the welding seam, the welding seam drives the contact wheel 16 to rotate through friction force, the contact wheel 16 drives the friction wheel 17 on the contact wheel to rotate, the friction wheel 17 drives the other friction wheel 17 to rotate through the belt, the cam 18 can rotate, the cam 18 can continuously push up the slide rod 19, when the slide rod 19 falls down, the collision block 20 can be used for colliding the welding seam, the coating covered on the welding seam is collided to crack, the coating is separated from the welding seam to be cleaned conveniently, an operator does not need to use a small hammer to knock the coating on the welding seam again, manpower is saved and automation is realized.
Claims (10)
1. A welding method of an automobile chassis is characterized in that: the method comprises the following steps:
the method comprises the following steps: arranging a chassis frame on the welding platform and fixing the chassis frame;
step two: erecting a track for moving a welding gun during welding according to the shape of a contact gap between chassis parts, and then installing the welding gun on the track;
step three: and selecting welding materials and a welding mode according to the welding requirements, and driving the welding gun to move by using an external power source to enable the welding gun to move along the contact gap between the chassis parts to complete welding of the welding seam.
Step four: and cleaning the flux coating and the welding slag on the welding seam to finish the welding of the chassis.
2. The automotive chassis welding method according to claim 1, characterized in that: and step two, after erecting the welding gun, adjusting the welding distance of the welding gun according to the welding position of the chassis, then enabling a welding material in the welding gun to be in contact with the welding position of the chassis to generate an electric arc, and keeping the length of the electric arc to be controlled at 2-3 mm.
3. The automotive chassis welding method according to claim 1, characterized in that: and the welding mode in the third step is one or more of gas shielded arc welding, cold pressure welding and submerged arc welding.
4. The welding method for an automobile chassis according to claim 3, characterized in that: the welding method of the automobile chassis further uses an automobile chassis welding device which comprises a welding gun (6) and an auxiliary part corresponding to the welding gun (6), wherein the auxiliary part comprises an arc striking plate (1), a transverse frame (2) and a bolt (3) driving the arc striking plate (1) to move on the transverse frame (2).
5. The welding method for an automobile chassis according to claim 4, characterized in that: the auxiliary portion further comprises a hanging rod (7), a slide way (12) arranged on the hanging rod (7) and a vertical rod (11) sliding in the slide way (12), a transverse frame (2) is fixedly connected onto the vertical rod (11), a welding gun (6) slides in the hanging rod (7), and a tension spring (15) is connected between the hanging rod (7) and the vertical rod (11).
6. The welding method for an automobile chassis according to claim 5, wherein: a groove (13) is formed in the slide way (12), a lifting and contracting rod (14) horizontally slides in the groove (13), and the lifting and contracting rod (14) is fixedly connected to the vertical rod (11).
7. The welding method for an automobile chassis according to claim 5, wherein: an air cylinder (8) is arranged on the suspender (7), and the welding gun (6) is fixedly connected on an air cylinder rod of the air cylinder (8).
8. The welding method for the automobile chassis according to any one of claims 6 or 7, characterized in that: the suspension rod (7) rotates on the suspension arm (9) in the vertical direction, and the suspension arm (9) rotates on the suspension frame (10) in the horizontal direction.
9. The welding method for an automobile chassis according to claim 4, characterized in that: the bolt (3) is provided with a blocking protrusion (4) and a cavity used for hiding the clamping block (5), and a spring is arranged between the clamping block (5) and the cavity.
10. The automotive chassis welding method according to claim 8, characterized in that: the auxiliary portion further comprises a contact wheel (16) and a cam (18), friction wheels (17) are arranged in the middle of the contact wheel (16) and the middle of the cam (18), the two friction wheels (17) are driven through a belt, a sliding rod (19) is arranged on the vertical rod (11), a collision block (20) is arranged on the sliding rod (19), and the contact wheel (16) and the cam (18) rotate on the vertical rod (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111048717.XA CN113664331B (en) | 2021-09-08 | 2021-09-08 | Automobile chassis welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111048717.XA CN113664331B (en) | 2021-09-08 | 2021-09-08 | Automobile chassis welding method |
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| Publication Number | Publication Date |
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| CN113664331A true CN113664331A (en) | 2021-11-19 |
| CN113664331B CN113664331B (en) | 2022-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111048717.XA Active CN113664331B (en) | 2021-09-08 | 2021-09-08 | Automobile chassis welding method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118926667A (en) * | 2024-10-14 | 2024-11-12 | 山东华宇工学院 | A vehicle chassis welding device and welding method for automobile engineering |
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| JPH1110344A (en) * | 1997-06-24 | 1999-01-19 | Arujiyon:Kk | Ignition tip of arc welding machine |
| CN205237289U (en) * | 2015-11-16 | 2016-05-18 | 奇瑞汽车股份有限公司 | Striking frock |
| CN206326315U (en) * | 2016-12-29 | 2017-07-14 | 芜湖市勤惠汽车配件制造有限公司 | A kind of automobile bottom diskware weld jig |
| CN108406195A (en) * | 2018-03-09 | 2018-08-17 | 芜湖天梦信息科技有限公司 | A welding tool for automobile chassis |
| CN108856977A (en) * | 2018-08-30 | 2018-11-23 | 中车株洲电力机车有限公司 | A kind of striking breath arc plate mounting tool |
| CN208680739U (en) * | 2018-07-08 | 2019-04-02 | 山东建筑大学 | A new welding gun nozzle suitable for MIG welding straight wall additive manufacturing |
| CN210649176U (en) * | 2019-06-25 | 2020-06-02 | 大连奥沃汽车制品有限公司 | Automatic chassis welded seat of welding usefulness |
-
2021
- 2021-09-08 CN CN202111048717.XA patent/CN113664331B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1110344A (en) * | 1997-06-24 | 1999-01-19 | Arujiyon:Kk | Ignition tip of arc welding machine |
| CN205237289U (en) * | 2015-11-16 | 2016-05-18 | 奇瑞汽车股份有限公司 | Striking frock |
| CN206326315U (en) * | 2016-12-29 | 2017-07-14 | 芜湖市勤惠汽车配件制造有限公司 | A kind of automobile bottom diskware weld jig |
| CN108406195A (en) * | 2018-03-09 | 2018-08-17 | 芜湖天梦信息科技有限公司 | A welding tool for automobile chassis |
| CN208680739U (en) * | 2018-07-08 | 2019-04-02 | 山东建筑大学 | A new welding gun nozzle suitable for MIG welding straight wall additive manufacturing |
| CN108856977A (en) * | 2018-08-30 | 2018-11-23 | 中车株洲电力机车有限公司 | A kind of striking breath arc plate mounting tool |
| CN210649176U (en) * | 2019-06-25 | 2020-06-02 | 大连奥沃汽车制品有限公司 | Automatic chassis welded seat of welding usefulness |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118926667A (en) * | 2024-10-14 | 2024-11-12 | 山东华宇工学院 | A vehicle chassis welding device and welding method for automobile engineering |
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| CN113664331B (en) | 2022-09-20 |
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Effective date of registration: 20250620 Address after: Building 3, No. 4 Chuangfu Road, Rongchang District, Chongqing City 402460 Patentee after: Mingxin (Chongqing) Robot Technology Co.,Ltd. Country or region after: China Address before: No. 29, Xiaogang North Road, Lantian Economic Development Zone, Zhangzhou City, Fujian Province 363008 Patentee before: FUJIAN MINGXIN INTELLIGENCE TECHNOLOGY Co.,Ltd. Country or region before: China |