CN111843148B - Stud welding process for sheet metal part of automobile body - Google Patents
Stud welding process for sheet metal part of automobile body Download PDFInfo
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- CN111843148B CN111843148B CN202010661906.3A CN202010661906A CN111843148B CN 111843148 B CN111843148 B CN 111843148B CN 202010661906 A CN202010661906 A CN 202010661906A CN 111843148 B CN111843148 B CN 111843148B
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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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
- B23K11/004—Welding of a small piece to a great or broad piece
- B23K11/0046—Welding of a small piece to a great or broad piece the extremity of a small piece being welded to a base, e.g. cooling studs or fins to tubes or plates
- B23K11/0053—Stud welding, i.e. resistive
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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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/02—Pressure butt welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/34—Preliminary treatment
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—Auxiliary equipment
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Abstract
The invention discloses a stud welding process for a sheet metal part of an automobile body, which comprises the following steps of: s1, selecting a spot welding station of a sheet metal part; s2, taking a stud and placing the stud at a position corresponding to the lower electrode tip; s3, taking the automobile body sheet metal part, flatly placing the automobile body sheet metal part on the top of the stud and contacting the top of the stud, pressing a clamp clamping button to enable a clamping cylinder to move downwards, and enabling the automobile body sheet metal part and the stud to be stably fixed between an upper electrode head and a lower electrode head; and S4, welding by using a robot, pressing a clamp opening button after welding is finished, automatically opening the clamp, taking a workpiece by a worker, and finishing welding. The invention adopts the resistance welding principle to weld the stud, combines different welding parameters to optimize through the structural design of the electrode and the tool, can stably weld the stud on the surface of the sheet metal part of the automobile body in the resistance welding mode, improves the stability of the welding quality, saves complicated special welding equipment and labor and greatly saves the development cost.
Description
Technical Field
The invention belongs to the technical field of welding, and particularly relates to a stud welding process for a sheet metal part of an automobile body.
Background
The welding process is a process for forming permanent connection by making the material of the workpiece reach interatomic bonding. Many parts of automobiles and the whole automobile bodies are connected in a welding mode, and with the development of light weight of automobiles, the development of aluminum alloy in the automobile industry is more and more obvious due to the light aluminum alloy material, the welding process of the aluminum alloy for the automobiles also becomes a thermal problem, but various stud welding processes of various automobile body sheet metal parts on the market still have various problems.
Conductive stud welding, as disclosed in publication No. CN101653861A, although it achieves a connection that results in a process-reliable, strong bond between the joining element and the workpiece, it does not solve the problems of the existing stud welding process for sheet metal parts of automobile bodies: the traditional stud welding process for the sheet metal part of the automobile body is an arc welding process, and a stud welding machine is high in cost and poor in stability, so that the stud welding process for the sheet metal part of the automobile body is provided.
Disclosure of Invention
The invention aims to provide a stud welding process for a sheet metal part of an automobile body, which adopts a resistance welding principle to weld studs, can stably weld the studs on the surface of the sheet metal part of the automobile body in a resistance welding mode by combining electrode and tool structure design and optimization of different welding parameters, improves the stability of welding quality, saves complicated special welding equipment and labor, greatly saves development cost and solves the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a stud welding process for a sheet metal part of an automobile body comprises the following steps:
s1, selecting a sheet metal part spot welding station, wherein the sheet metal part spot welding station comprises an L-shaped vertical seat, a clamping cylinder, a plurality of connecting blocks, an upper electrode head, a lower electrode head, an upper electrode mounting seat, a lower electrode mounting seat and a spring connecting sheet;
s2, taking a stud and placing the stud at a position corresponding to the lower electrode tip;
s3, taking the automobile body sheet metal part, flatly placing the automobile body sheet metal part on the top of the stud and contacting with the top of the stud, pressing a clamp clamping button to enable a clamping cylinder to move downwards, pressing an upper electrode head on the upper surface of the automobile body sheet metal part, and enabling the automobile body sheet metal part and the stud to be stably fixed between the upper electrode head and a lower electrode head;
s4, welding the contact point of the automobile body sheet metal part and the stud twice by using a robot, wherein the welding time of one-time welding is 20-40ms, the welding pressure is 2200-2400N, the welding current is 5.5-6.5A, the welding time of the second-time welding is 70-90ms, the welding pressure is 2200-2400N, the welding current is 10-11KVA, after the welding is finished, pressing a clamp opening button, automatically opening the clamp, taking the part by an employee, and finishing the welding.
Preferably, before taking out the stud in S2, the welding end face of the stud needs to be decontaminated with NaOH alkali solution.
Preferably, the stud is washed with water and then dried after decontamination treatment, and then the end face of the stud is subjected to sand blasting treatment, wherein the sand used in the sand blasting treatment is: the sand is chilled low-phosphorus cast iron sand, copper ore sand, quartz sand or corundum sand, and the size of the sand is 0.5-2.0 mm.
Preferably, before the automobile body sheet metal part is taken in S3, the surface of the automobile body sheet metal part needs to be processed, including the following steps: putting the mixture into NaOH solution for deoiling treatment; step two, placing the washed mixture into a phosphoric acid solution for corrosion treatment; step three, putting the washed mixture into a nitric acid solution for brightening treatment; step four, washing and drying; and step five, scraping and cleaning the groove of the welding joint by using a steel wire brush.
Preferably, the welding time of the one-time welding is 30ms, the welding pressure is 2300N, and the welding current is 6.0 KVA.
Preferably, the welding time of the secondary welding is 80ms, the welding pressure is 2300N, and the welding current is 10.5 KVA.
Preferably, in S4, after the welding is completed, the post-welding cleaning and inspection is required: after the welding of the automobile body sheet metal part and the stud is finished, performing dust wiping and cleaning on the periphery of the welding line, and checking according to the quality requirement of the welding line of the automobile body sheet metal part and the stud.
Preferably, after the inspection is qualified, the welding seam between the automobile body sheet metal part and the stud is polished by sand paper.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention adopts the resistance welding principle to weld the stud, combines different welding parameters to optimize through the structural design of the electrode and the tool, can stably weld the stud on the surface of the sheet metal part of the automobile body in the resistance welding mode, improves the stability of the welding quality, saves complicated special welding equipment and labor and greatly saves the development cost.
(2) The invention can avoid the quality overflow defect caused by 10 percent of welding instability generated by the traditional electric arc welding process, reduce the welding instability to less than 1 percent, improve the stability of the welding quality, save special electric arc welding consumables, special electric arc welding tools and site occupation and reduce the cost.
Drawings
FIG. 1 is a schematic view of a spring connecting piece according to the present invention;
FIG. 2 is a schematic top view of the spring connecting piece of the present invention;
FIG. 3 is a cross-sectional view of a spring attachment tab of the present invention;
FIG. 4 is a schematic structural view of an upper electrode mount and a lower electrode mount according to the present invention;
FIG. 5 is a schematic top view of the structure of FIG. 4 according to the present invention;
FIG. 6 is a schematic structural view of an upper electrode head according to the present invention;
FIG. 7 is a schematic top view of the upper electrode head of the present invention;
FIG. 8 is a schematic front view of the upper electrode head according to the present invention;
FIG. 9 is a schematic structural view of a lower electrode head in the present invention;
FIG. 10 is a schematic top view of the lower electrode head of the present invention;
fig. 11 is a front view schematically showing the structure of the lower electrode head in the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1 to 11, the present invention provides a technical solution: a stud welding process for a sheet metal part of an automobile body comprises the following steps:
s1, selecting a sheet metal part spot welding station, wherein the sheet metal part spot welding station comprises an L-shaped vertical seat, a clamping cylinder, a plurality of connecting blocks, an upper electrode head, a lower electrode head, an upper electrode mounting seat, a lower electrode mounting seat and a spring connecting sheet;
the spring connecting sheets are arranged in two groups, each group of spring connecting sheets is provided with four groups of first positioning holes, the upper electrode mounting seat and the lower electrode mounting seat are rectangular plates with semicircular protruding plates, the circle center of each semicircular protruding plate is provided with a circular hole groove, two groups of second positioning holes are symmetrically arranged at the positions of the rectangular plates, the two groups of second positioning holes at one sides of the upper electrode mounting seat and the lower electrode mounting seat are fixedly connected with the two groups of first positioning holes at one side of each spring connecting sheet, the two groups of first positioning holes at the other side of each spring connecting sheet are fixedly arranged on stations, the upper electrode head is cylindrical, the upper electrode head is arranged in the circular hole groove of the upper electrode mounting seat, the lower electrode head is cylindrical, the upper surface of the lower electrode head is provided with a groove for placing a stud, and the lower surface of the lower electrode head is arranged in the circular hole groove of the lower electrode mounting seat;
s2, taking a stud and placing the stud at a position corresponding to the lower electrode tip;
s3, taking the automobile body sheet metal part, flatly placing the automobile body sheet metal part on the top of the stud and contacting with the top of the stud, pressing a clamp clamping button to enable a clamping cylinder to move downwards, pressing an upper electrode head on the upper surface of the automobile body sheet metal part, and enabling the automobile body sheet metal part and the stud to be stably fixed between the upper electrode head and a lower electrode head;
and S4, welding the contact point of the automobile body sheet metal part and the stud twice by using the robot, wherein the welding time of one-time welding is 20ms, the welding pressure is 2200N, the welding current is 5.5A, the welding time of the second-time welding is 70ms, the welding pressure is 2200N, the welding current is 10KVA, and after the welding is finished, pressing a clamp opening button to automatically open the clamp, taking the part by a worker, and finishing the welding.
In order to remove oil stains on the surface of the stud and increase welding stability, in this embodiment, it is preferable that before taking out the stud in S2, the welding end surface of the stud needs to be decontaminated with NaOH alkali solution.
In order to facilitate removal of rust on the surface of the stud and increase welding stability, in this embodiment, it is preferable that the stud is washed with water and dried after being subjected to decontamination treatment, and then the end face of the stud is subjected to sand blasting treatment, where sand used in the sand blasting treatment is: chilled low-phosphorus cast iron sand, copper ore sand, quartz sand or corundum sand, and the size of the sand is 0.5 mm.
In order to facilitate oil removal and rust removal of the welding surface of the automobile body sheet metal part and increase welding stability, in this embodiment, preferably, before the automobile body sheet metal part is taken in S3, the surface of the automobile body sheet metal part needs to be treated, including the following steps: putting the mixture into NaOH solution for deoiling treatment; step two, placing the washed mixture into a phosphoric acid solution for corrosion treatment; step three, putting the washed cloth into a nitric acid solution for brightening treatment; step four, washing and drying; and step five, scraping and cleaning the groove of the welding joint by using a steel wire brush.
In order to perform the qualification detection on the welded seam between the welded automobile body sheet metal part and the stud bolt, in this embodiment, preferably, after the welding is completed in S4, post-welding cleaning and inspection are required: after the welding of the automobile body sheet metal part and the stud is finished, performing dust wiping and cleaning on the periphery of the welding line, and checking according to the quality requirement of the welding line of the automobile body sheet metal part and the stud.
In order to reduce burrs at the welding seam between the automobile body sheet metal part and the stud and increase smoothness, the method is preferred in the embodiment, after the inspection is qualified, the welding seam between the automobile body sheet metal part and the stud is polished by sand paper.
The structural principle of the invention is as follows: according to the invention, the stud welding is carried out by adopting a resistance welding principle, and through the structural design of the electrode and the tool, different welding parameters are optimized, so that the stud can be stably welded on the surface of the sheet metal part of the automobile body in a resistance welding manner, the stability of the welding quality is improved, complicated special welding equipment and labor are saved, and the development cost is greatly saved; the invention can avoid the quality overflow defect caused by 10 percent of welding instability generated by the traditional electric arc welding process, reduce the welding instability to less than 1 percent, improve the stability of the welding quality, save special electric arc welding consumables, special electric arc welding tools and site occupation and reduce the cost.
Example 2
Referring to fig. 1 to 11, the present invention provides a technical solution: a stud welding process for a sheet metal part of an automobile body comprises the following steps:
s1, selecting a sheet metal part spot welding station, wherein the sheet metal part spot welding station comprises an L-shaped vertical seat, a clamping cylinder, a plurality of connecting blocks, an upper electrode head, a lower electrode head, an upper electrode mounting seat, a lower electrode mounting seat and a spring connecting sheet;
s2, taking a stud and placing the stud at a position corresponding to the lower electrode tip;
s3, taking the automobile body sheet metal part, flatly placing the automobile body sheet metal part on the top of the stud and contacting with the top of the stud, pressing a clamp clamping button to enable a clamping cylinder to move downwards, pressing an upper electrode head on the upper surface of the automobile body sheet metal part, and enabling the automobile body sheet metal part and the stud to be stably fixed between the upper electrode head and a lower electrode head;
and S4, welding the contact point of the automobile body sheet metal part and the stud twice by using the robot, wherein the welding time of one-time welding is 40ms, the welding pressure is 2400N, the welding current is 6.5A, the welding time of the second-time welding is 90ms, the welding pressure is 2400N, the welding current is 11KVA, after the welding is completed, pressing a clamp opening button, automatically opening the clamp, taking the part by a worker, and completing the welding.
Example 3
Referring to fig. 1 to 11, the present invention provides a technical solution: a stud welding process for a sheet metal part of an automobile body comprises the following steps:
s1, selecting a sheet metal part spot welding station, wherein the sheet metal part spot welding station comprises an L-shaped vertical seat, a clamping cylinder, a plurality of connecting blocks, an upper electrode head, a lower electrode head, an upper electrode mounting seat, a lower electrode mounting seat and a spring connecting sheet;
s2, taking a stud and placing the stud at a position corresponding to the lower electrode tip;
s3, taking the automobile body sheet metal part, flatly placing the automobile body sheet metal part on the top of the stud and contacting with the top of the stud, pressing a clamp clamping button to enable a clamping cylinder to move downwards, pressing an upper electrode head on the upper surface of the automobile body sheet metal part, and enabling the automobile body sheet metal part and the stud to be stably fixed between the upper electrode head and a lower electrode head;
and S4, welding the contact point of the automobile body sheet metal part and the stud twice by using a robot, wherein the welding time of one-time welding is 30ms, the welding pressure is 2300N, the welding current is 6A, the welding time of the second-time welding is 80ms, the welding pressure is 2300N, the welding current is 10KVA, after the welding is finished, pressing a clamp opening button, automatically opening the clamp, taking the part by a worker, and finishing the welding.
In order to remove oil stains on the surface of the stud and increase welding stability, in this embodiment, it is preferable that before taking out the stud in S2, the welding end surface of the stud needs to be decontaminated with NaOH alkali solution.
In order to facilitate removal of rust on the surface of the stud and increase welding stability, in this embodiment, it is preferable that the stud is washed with water and dried after being subjected to decontamination treatment, and then the end face of the stud is subjected to sand blasting treatment, where sand used in the sand blasting treatment is: chilled low-phosphorus cast iron sand, copper ore sand, quartz sand or corundum sand, and the size of the sand is 1 mm.
In order to facilitate oil removal and rust removal of the welding surface of the automobile body sheet metal part and increase welding stability, in this embodiment, preferably, before the automobile body sheet metal part is taken in S3, the surface of the automobile body sheet metal part needs to be treated, including the following steps: step one, putting the mixture into NaOH solution for deoiling treatment; step two, placing the washed mixture into a phosphoric acid solution for corrosion treatment; step three, putting the washed mixture into a nitric acid solution for brightening treatment; step four, washing and drying; and step five, scraping and cleaning the groove of the welding joint by using a steel wire brush.
In order to perform the qualification detection on the welded seam between the welded automobile body sheet metal part and the stud bolt, in this embodiment, preferably, after the welding is completed in S4, post-welding cleaning and inspection are required: after the welding of the automobile body sheet metal part and the stud is finished, the periphery of the welding line is cleaned by dust, and the inspection is carried out according to the quality requirement of the welding line of the automobile body sheet metal part and the stud.
In order to reduce burrs at the welding seam between the automobile body sheet metal part and the stud and increase smoothness, the method is preferred in the embodiment, after the inspection is qualified, the welding seam between the automobile body sheet metal part and the stud is polished by sand paper.
Example 4
Referring to fig. 1 to 11, the present invention provides a technical solution: a stud welding process for a sheet metal part of an automobile body comprises the following steps:
s1, selecting a sheet metal part spot welding station, wherein the sheet metal part spot welding station comprises an L-shaped vertical seat, a clamping cylinder, a plurality of connecting blocks, an upper electrode head, a lower electrode head, an upper electrode mounting seat, a lower electrode mounting seat and a spring connecting sheet;
s2, taking a stud and placing the stud at a position corresponding to the lower electrode tip;
s3, taking the automobile body sheet metal part, flatly placing the automobile body sheet metal part on the top of the stud and contacting with the top of the stud, pressing a clamp clamping button to enable a clamping cylinder to move downwards, pressing an upper electrode head on the upper surface of the automobile body sheet metal part, and enabling the automobile body sheet metal part and the stud to be stably fixed between the upper electrode head and a lower electrode head;
s4, welding the contact point of the automobile body sheet metal part and the stud twice by using the robot, wherein the welding time of one-time welding is 35ms, the welding pressure is 2350N, the welding current is 6A, the welding time of the second-time welding is 80ms, the welding pressure is 2300N, the welding current is 10KVA, after the welding is finished, pressing a clamp opening button, automatically opening the clamp, taking the part by a worker, and finishing the welding.
In order to remove oil stains on the surface of the stud and increase welding stability, in this embodiment, it is preferable that before the stud is taken out from S2, the welding end surface of the stud needs to be decontaminated with NaOH alkali solution.
In order to facilitate removal of rust on the surface of the stud and increase welding stability, in this embodiment, it is preferable that the stud is washed with water and dried after being subjected to decontamination treatment, and then the end face of the stud is subjected to sand blasting treatment, where sand used in the sand blasting treatment is: chilled low-phosphorous cast iron sand, copper ore sand, quartz sand or corundum sand, and the size of the sand grains is 1.5 mm.
In order to facilitate oil removal and rust removal of the welding surface of the automobile body sheet metal part and increase welding stability, in this embodiment, preferably, before the automobile body sheet metal part is taken in S3, the surface of the automobile body sheet metal part needs to be treated, including the following steps: step one, putting the mixture into NaOH solution for deoiling treatment; step two, placing the washed mixture into a phosphoric acid solution for corrosion treatment; step three, putting the washed mixture into a nitric acid solution for brightening treatment; step four, washing and drying; and step five, scraping and cleaning the groove of the welding joint by using a steel wire brush.
In order to perform the qualification detection on the welded seam between the welded automobile body sheet metal part and the stud, in this embodiment, preferably, after the welding is completed in S4, the post-welding cleaning and inspection are required: after the welding of the automobile body sheet metal part and the stud is finished, the periphery of the welding line is cleaned by dust, and the inspection is carried out according to the quality requirement of the welding line of the automobile body sheet metal part and the stud.
In order to reduce burrs at the welding seam between the automobile body sheet metal part and the stud and increase smoothness, the method is preferred in the embodiment, after the inspection is qualified, the welding seam between the automobile body sheet metal part and the stud is polished by sand paper.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The stud welding process for the sheet metal part of the automobile body is characterized by comprising the following steps of:
s1, selecting a sheet metal part spot welding station, wherein the sheet metal part spot welding station comprises an L-shaped vertical seat, a clamping cylinder, a plurality of connecting blocks, an upper electrode head, a lower electrode head, an upper electrode mounting seat, a lower electrode mounting seat and a spring connecting sheet;
the spring connecting sheets are arranged in two groups, each group of spring connecting sheets is provided with four groups of first positioning holes, the upper electrode mounting seat and the lower electrode mounting seat are rectangular plates with semicircular protruding plates, the circle center of each semicircular protruding plate is provided with a circular hole groove, two groups of second positioning holes are symmetrically arranged at the positions of the rectangular plates, the two groups of second positioning holes at one sides of the upper electrode mounting seat and the lower electrode mounting seat are fixedly connected with the two groups of first positioning holes at one side of each spring connecting sheet, the two groups of first positioning holes at the other side of each spring connecting sheet are fixedly arranged on stations, the upper electrode head is cylindrical, the upper electrode head is arranged in the circular hole groove of the upper electrode mounting seat, the lower electrode head is cylindrical, the upper surface of the lower electrode head is provided with a groove for placing a stud, and the lower surface of the lower electrode head is arranged in the circular hole groove of the lower electrode mounting seat;
s2, taking a stud and placing the stud at a position corresponding to the lower electrode tip;
s3, taking the automobile body sheet metal part, flatly placing the automobile body sheet metal part on the top of the stud and contacting with the top of the stud, pressing a clamp clamping button to enable a clamping cylinder to move downwards, and pressing an upper electrode head on the upper surface of the automobile body sheet metal part to enable the automobile body sheet metal part and the stud to be stably fixed between the upper electrode head and a lower electrode head;
s4, welding the contact point of the automobile body sheet metal part and the stud twice by using a robot, wherein the welding time of one-time welding is 20-40ms, the welding pressure is 2200-2400N, the welding current is 5.5-6.5A, the welding time of the second-time welding is 70-90ms, the welding pressure is 2200-2400N, the welding current is 10-11KVA, after the welding is finished, pressing a clamp opening button, automatically opening the clamp, taking the part by an employee, and finishing the welding.
2. The stud welding process for sheet metal parts of automobile bodies according to claim 1, characterized in that: before taking out the stud in S2, the welding end face of the stud needs to be decontaminated by NaOH alkaline solution.
3. The stud welding process for sheet metal parts of the automobile body according to claim 2, characterized in that: the decontamination treatment is carried out on the stud after being washed by water and then dried, and then the sand blasting treatment is carried out on the end surface of the stud, wherein the sand used in the sand blasting treatment is as follows: the sand is chilled low-phosphorus cast iron sand, copper ore sand, quartz sand or corundum sand, and the size of the sand is 0.5-2.0 mm.
4. The stud welding process for sheet metal parts of automobile bodies according to claim 1, characterized in that: before the automobile body sheet metal part is taken out from S3, the surface of the automobile body sheet metal part needs to be processed, and the method comprises the following steps: putting the mixture into NaOH solution for deoiling treatment; step two, placing the washed mixture into a phosphoric acid solution for corrosion treatment; step three, putting the washed mixture into a nitric acid solution for brightening treatment; step four, washing and drying; and step five, scraping and cleaning the groove of the welding joint by using a steel wire brush.
5. The stud welding process for sheet metal parts of automobile bodies according to claim 1, characterized in that: the welding time of one-time welding is 30ms, the welding pressure is 2300N, and the welding current is 6.0 KVA.
6. The stud welding process for sheet metal parts of automobile bodies according to claim 1, characterized in that: the welding time of the secondary welding is 80ms, the welding pressure is 2300N, and the welding current is 10.5 KVA.
7. The stud welding process for sheet metal parts of automobile bodies according to claim 1, characterized in that: in S4, after the welding is completed, post-welding cleaning and inspection are required: after the welding of the automobile body sheet metal part and the stud is finished, performing dust wiping and cleaning on the periphery of the welding line, and checking according to the quality requirement of the welding line of the automobile body sheet metal part and the stud.
8. The stud welding process for sheet metal parts of automobile bodies according to claim 7, characterized in that: and after the inspection is qualified, polishing the welding seam between the sheet metal part of the automobile body and the stud, wherein the polishing is performed by using abrasive paper.
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| CN113909662A (en) * | 2021-11-04 | 2022-01-11 | 苏州科伦特电源科技有限公司 | Method for realizing copper-silver contact welding |
| CN114559136A (en) * | 2022-03-02 | 2022-05-31 | 玛斯特轻量化科技(天津)有限公司 | Stud welding and clamping integrated device |
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| CN1060807A (en) * | 1990-10-19 | 1992-05-06 | 青山好高 | Projection welding method and device thereof |
| CN201534260U (en) * | 2009-11-02 | 2010-07-28 | 众泰控股集团有限公司 | Novel stud spot-welding machine |
| CN202185672U (en) * | 2011-08-16 | 2012-04-11 | 上海联明机械股份有限公司 | Projection welding machine for stud welding |
| CN203045135U (en) * | 2013-01-09 | 2013-07-10 | 重庆星乔实业有限公司 | Nut and bolt coaxial and synchronous welding device |
| CN103692075A (en) * | 2013-11-28 | 2014-04-02 | 南车青岛四方机车车辆股份有限公司 | Resistance spot welding process for aluminium alloy parts |
| CN106425070A (en) * | 2016-12-07 | 2017-02-22 | 上汽大众汽车有限公司 | Welding method of galvanized steel plate |
| CN107252961A (en) * | 2017-05-17 | 2017-10-17 | 广州广汽荻原模具冲压有限公司 | A kind of stud welding method and welder |
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