CN110695507A - Resistance spot welding method - Google Patents
Resistance spot welding method Download PDFInfo
- Publication number
- CN110695507A CN110695507A CN201911019477.3A CN201911019477A CN110695507A CN 110695507 A CN110695507 A CN 110695507A CN 201911019477 A CN201911019477 A CN 201911019477A CN 110695507 A CN110695507 A CN 110695507A
- Authority
- CN
- China
- Prior art keywords
- electrode
- male die
- die electrode
- spot welding
- welded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 139
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005192 partition Methods 0.000 claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 238000005056 compaction Methods 0.000 claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 52
- 229910052802 copper Inorganic materials 0.000 claims description 52
- 239000010949 copper Substances 0.000 claims description 52
- 238000005299 abrasion Methods 0.000 claims description 19
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 230000002035 prolonged effect Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 150000002739 metals Chemical class 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Images
Classifications
-
- 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
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/16—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded
- B23K11/18—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded of non-ferrous metals
- B23K11/185—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded of non-ferrous metals of aluminium or aluminium alloys
-
- 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
- B23K11/30—Features relating to 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
- 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
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/15—Magnesium or alloys thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
Abstract
The invention belongs to the technical field of welding manufacture, in particular to a resistance spot welding method, wherein a resistance electric welding machine adopted by the spot welding method comprises a machine foot; the top of the machine leg is fixedly connected with a machine frame, and the top of the machine frame is provided with a pressing cylinder; a piston feed rod of the compaction cylinder is fixedly connected with a base plate and a shell; the basal disc is connected with the control cabinet through a conductive plate; a cylindrical male die electrode is rotatably connected in the shell; a partition board is arranged in the shell, and a first gear is arranged at the upper part of the male die electrode; the partition board is fixedly connected with a motor; the output shaft of the motor is fixedly connected with a second gear which is meshed with the first gear; the middle part of the frame is fixedly connected with the workbench corresponding to the base plate, and the workbench is provided with the female die electrode.
Description
Technical Field
The invention belongs to the technical field of welding manufacturing, and particularly relates to a resistance spot welding method.
Background
At present, resistance spot welding is one of the most widely applied welding methods in aviation, aerospace and automobile manufacturing industries, taking automobile manufacturing as an example, 3000-plus 5000 resistance spot welding spots exist on an automobile, the resistance spot welding can realize high-strength connection of plates, in order to ensure the reliability of the automobile, the actual spot welding number is higher than that of the design by 30%, and the high-quality and high-efficiency resistance spot welding technology can save a large amount of production cost, so that the updating and updating of the resistance spot welding technology and equipment have important practical application significance.
The aluminum alloy and the magnesium alloy are easy to generate an oxide film, the conductivity of the oxide film is poor, and the phenomena of discontinuous defects such as micro cavities and cracks, over-deep indentation and the like are often accompanied in resistance welding; when dissimilar metals of aluminum, magnesium and steel are welded, the physical and chemical properties of parent metals are greatly different, and high-brittleness intermetallic compounds are easily generated, so that great difficulty is brought to electric resistance welding.
Disclosure of Invention
In order to make up for the defects of the prior art, the problems that the aluminum alloy and the magnesium alloy are easy to generate an oxide film, the oxide film has poor conductivity, and the phenomena of discontinuous defects such as micro cavities and cracks, over-deep indentation and the like are often accompanied in resistance welding are solved; the invention provides a resistance spot welding method, which solves the problems that when aluminum, magnesium and steel dissimilar metals are welded, the physical and chemical properties of parent metals are greatly different, and high-brittleness intermetallic compounds are easily generated, so that great difficulty is brought to resistance welding.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a resistance spot welding method, which comprises the following steps:
s1, a prepressing stage, namely placing the plate to be welded between a convex model electrode and a concave model electrode on a resistance electric welding machine for prepressing, wherein in the prepressing stage, the convex model electrode presses the part of the plate to be welded into the concave model electrode under the action of pressure;
s2, in the welding stage, a power supply is switched on to melt and soften the plates to be welded under the action of resistance heat, the interface of the plates to be welded is metallurgically bonded to form connection under the action of melting, the plates to be welded are filled with the concave model electrode under the action of the pressure of the convex model electrode, and the edges of welding points are interlocked under the extrusion action of the outer edge of the convex model electrode and the inner edge of the concave model electrode;
s3, cooling and crystallizing, and forming an interlocking resistance spot welding spot after electrifying is finished and preset pressure is kept;
the resistance electric welding machine adopted by the invention comprises a machine foot; the top of the machine leg is fixedly connected with a C-shaped rack, a control cabinet is arranged on the side face of the rack, a compaction and compaction air cylinder is arranged on the top of the rack, the compaction and compaction air cylinder is communicated with a high-pressure air source through an electromagnetic valve, and the electromagnetic valve is controlled through the control cabinet; a piston feed rod of the compaction cylinder is fixedly connected with a base plate, and the bottom of the base plate is fixedly connected with a shell; the basal disc is connected with the control cabinet through a conductive plate; a cylindrical male die electrode is rotatably connected in the shell and is electrically connected with the current conducting plate; a partition plate is arranged in the shell, and the male die electrode penetrates through the partition plate and the shell and then extends to the outside of the shell; a first gear is arranged at the upper part of the male die electrode; the partition board is fixedly connected with a motor, and the motor is connected with a power supply through a control cabinet; the output shaft of the motor is fixedly connected with a second gear, and the second gear is meshed with the first gear; a workbench is fixedly connected to the middle of the rack and corresponds to the base plate, a female die electrode is mounted on the workbench and matched with a male die electrode, and the female die electrode is electrically connected with the control cabinet through a lead; the male die electrode is driven to rotate by the motor, so that an oxide layer of a to-be-welded part is reduced, the conductivity is increased, and the welding efficiency of the spot welding machine is increased; when the welding machine is used, a sheet to be welded is placed on a female die electrode, then the electromagnetic valve is controlled to be opened through the control cabinet, the compaction air cylinder pushes the base plate to move downwards, the base plate drives the shell and the male die electrode to move downwards and approach the sheet to be welded, at the moment, the motor is controlled to be started through the control cabinet, the motor drives the male die electrode to rotate through the transmission of the second gear and the first gear, at the moment, the compaction air cylinder continuously pushes the male die electrode to move downwards and contact the sheet to be welded, the rotating male die electrode rubs and removes an oxide layer on the surface of the sheet to be welded, the conductivity of the sheet to be welded is increased, then the motor is controlled to stop rotating through the control cabinet, the compaction air cylinder is controlled to push the male die electrode to extrude the male die electrode into the female die electrode, the sheets to be welded are riveted with each other, and then the male die electrode and the female die electrode, the resistance heating of the thin plate to be welded is utilized to weld the thin plate, then the control cabinet controls the power-off of the male die electrode and the female die electrode, the male die electrode is controlled to be lifted upwards at the same time, the welding work is further completed, the thin plate of the thin plate to be welded is rotated and rubbed through the male die electrode, the conductivity of the thin plate to be welded is increased, and therefore the welding efficiency of the spot welding machine is increased.
Preferably, the bottom of the male die electrode is provided with a friction disc made of hard alloy, the bottom of the friction disc is uniformly provided with a group of friction columns, the abrasion of the male die electrode can be reduced through the friction disc, and the service life of the resistance electric welding machine is prolonged; through the friction disk and the friction column made of hard alloy, the efficiency of removing the oxide layer on the surface of the thin plate to be welded can be improved, and meanwhile, the abrasion of the male die electrode is avoided, so that the service life of the resistance electric welding machine is prolonged, and the welding efficiency of the spot welding machine is further increased.
Preferably, a first sliding hole is formed in the friction column, a copper rod is arranged in the first sliding hole, and the copper rod is electrically connected with the male die electrode; the conductivity of the friction column can be increased through the copper rod, and the welding efficiency of the spot welding machine is further increased; because the conductivity of the hard alloy is insufficient, the conductivity of the friction disc can be increased through the copper rod arranged in the first sliding hole, and the welding efficiency of the spot welding machine is further improved.
Preferably, an annular air bag is arranged at the position, close to the first gear, of the upper part of the male die electrode, and the air bag is eccentrically sleeved on the male die electrode; the first support is fixedly connected to the partition plate, and a top block is arranged on one side, close to the air bag, of the first support and used for extruding the air bag; a vent hole communicated with the air bag is formed in the male die electrode; one end of the male die electrode, which is close to the friction disc, is provided with a second sliding hole, and a copper sliding block is connected in the second sliding hole in a sliding and sealing manner; the sliding block is fixedly connected with the copper bar, and the copper bar is in sliding connection with the first sliding hole; the vent hole is communicated with the top of the second sliding hole; compressed gas generated by the air bag pushes the copper bar to extend out, so that the abrasion of the copper bar is compensated, and the welding efficiency of the spot welding machine is further increased; when the male die electrode rotates, the air bag is continuously extruded by the ejector block, so that compressed gas is generated in the air bag and is filled into the second sliding hole through the air hole, pressure is further applied to the sliding block and the copper rod, and due to the fact that the friction column and the copper rod are different in abrasion speed, the copper rod is continuously pushed to extend out of the first sliding hole through the compressed gas introduced into the second sliding hole, so that the abrasion loss of the copper rod is compensated, the copper rod is kept in good electrical contact with a thin plate to be welded, and welding efficiency of the spot welding machine is further improved.
Preferably, a group of first holes are formed in the sliding block, and pressure limiting valves are arranged in the first holes; a group of second holes are formed in the friction disc and communicated with the second sliding hole; compressed air in the second sliding hole is sprayed out through the first hole and the second hole, so that oxide skins falling off from the surface of a to-be-welded piece can be conveniently cleaned, and the welding efficiency of the spot welding machine is further improved; when the air pressure in the second sliding hole is too large, compressed air in the second sliding hole is sprayed out through the pressure limiting valve, the first hole and the second hole, and then oxide skin scraps on the thin plate to be welded are cleaned, the conductivity of the thin plate to be welded is further increased, meanwhile, the phenomenon that the air pressure in the second sliding hole is too large is prevented, the pressure of the copper rod and the thin plate to be welded is increased, the abrasion of the copper rod is further reduced, and the welding efficiency of the spot welding machine is further improved.
Preferably, the lower part of the male die electrode is sleeved with a splash-proof sleeve, and the splash-proof sleeve is connected with the male die electrode in a sliding manner; the bottom height of the splash-proof sleeve is lower than that of the friction disc; a limiting ring is arranged at the top of the splash-proof sleeve, and a return spring is sleeved on a male die electrode between the limiting ring and the partition plate; the splash-proof sleeve can reduce metal splash in the welding process, and further increase the welding efficiency of the spot welding machine; when compressing tightly cylinder and promoting base plate and terrace die electrode and moving down, the splashproof cover contacts flat earlier and compresses tightly the sheet metal of treating the welding, then welds the sheet metal through terrace die electrode cooperation die electrode, can reduce the welding slag through the splashproof cover and splash, guarantees welding safety, improves welding quality, further improves spot welder's welding efficiency.
The invention has the following beneficial effects:
1. according to the resistance spot welding method, the male die electrode rotates and rubs the thin plate of the thin plate to be welded, so that the conductivity of the thin plate to be welded is increased, and the welding efficiency of a spot welding machine is improved.
2. According to the resistance spot welding method, the compressed gas generated by the air bag pushes the copper rod to continuously extend out of the first sliding hole so as to compensate the abrasion loss of the copper rod, so that the copper rod is kept in good electrical contact with the thin plate to be welded, and the welding efficiency of a spot welding machine is further improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a perspective view of a resistance welder used in the present invention;
FIG. 3 is a cross-sectional view of the housing and male electrode of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is an enlarged view of a portion of FIG. 3 at B;
in the figure: the device comprises a machine foot 1, a machine frame 11, a control cabinet 12, a pressing cylinder 13, a base plate 14, a conductive plate 15, a shell 2, a male die electrode 3, a partition plate 21, a first gear 22, a motor 23, a second gear 24, a workbench 16, a female die electrode 17, a friction disc 31, a friction column 32, a first sliding hole 33, a copper rod 34, an air bag 25, a first support 26, a top block 27, a vent hole 35, a second sliding hole 36, a sliding block 37, a first hole 38, a pressure limiting valve 39, a second hole 310, a splash guard 4 and a limiting ring 41.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 5, a resistance spot welding method according to the present invention includes the steps of:
s1, a prepressing stage, namely placing the plate to be welded between a convex model electrode and a concave model electrode on a resistance electric welding machine for prepressing, wherein in the prepressing stage, the convex model electrode presses the part of the plate to be welded into the concave model electrode under the action of pressure;
s2, in the welding stage, a power supply is switched on to melt and soften the plates to be welded under the action of resistance heat, the interface of the plates to be welded is metallurgically bonded to form connection under the action of melting, the plates to be welded are filled with the concave model electrode under the action of the pressure of the convex model electrode, and the edges of welding points are interlocked under the extrusion action of the outer edge of the convex model electrode and the inner edge of the concave model electrode;
s3, cooling and crystallizing, and forming an interlocking resistance spot welding spot after electrifying is finished and preset pressure is kept;
the resistance electric welding machine adopted by the invention comprises a machine leg 1; the top of the machine leg 1 is fixedly connected with a C-shaped rack 11, a control cabinet 12 is arranged on the side face of the rack 11, a pressing cylinder 13 is arranged on the top of the rack 11, the pressing cylinder 13 is communicated with a high-pressure air source through an electromagnetic valve, and the electromagnetic valve is controlled through the control cabinet 12; a piston feed rod of the compaction cylinder 13 is fixedly connected with a base plate 14, and the bottom of the base plate 14 is fixedly connected with a shell 2; the base plate 14 is connected with the control cabinet 12 through a conductive plate 15; a cylindrical male die electrode 3 is rotatably connected in the shell 2, and the male die electrode 3 is electrically connected with the conductive plate 15; a partition plate 21 is arranged in the shell 2, and the male die electrode 3 penetrates through the partition plate 21 and the shell 2 and then extends to the outside of the shell 2; the upper part of the male die electrode 3 is provided with a first gear 22; the partition board 21 is fixedly connected with a motor 23, and the motor 23 is connected with a power supply through the control cabinet 12; the output shaft of the motor 23 is fixedly connected with a second gear 24, and the second gear 24 is meshed with the first gear 22; a workbench 16 is fixedly connected to the middle of the rack 11 and corresponds to the base plate 14, a female die electrode 17 is mounted on the workbench 16, the female die electrode 17 is matched with the male die electrode 3, and the female die electrode 17 is electrically connected with the control cabinet 12 through a lead; the male die electrode 3 is driven to rotate by the motor 23, so that an oxide layer of a workpiece to be welded is reduced, the conductivity is increased, and the welding efficiency of the spot welding machine is increased; when the welding device is used, a sheet to be welded is placed on the female die electrode 17, then the electromagnetic valve is controlled to be opened through the control cabinet 12, so that the pressing cylinder 13 pushes the base plate 14 to move downwards, the base plate 14 drives the shell 2 and the male die electrode 3 to move downwards and approach to the sheet to be welded, at this time, the control cabinet 12 controls the motor 23 to be started, so that the motor 23 drives the male die electrode 3 to rotate through the transmission of the second gear 24 and the first gear 22, at this time, the pressing cylinder 13 continuously pushes the male die electrode 3 to move downwards and contact with the sheet to be welded, the rotating male die electrode 3 rubs and removes an oxide layer on the surface of the sheet to be welded, the conductivity of the sheet to be welded is increased, then the control cabinet 12 controls the motor 23 to stop rotating, and at the same time, the pressing cylinder 13 is controlled to push the male die electrode 3 to extrude the sheet to be welded into the female, the thin plates to be welded are riveted, the male die electrode 3 and the female die electrode 17 are controlled to be electrified through the control cabinet 12, the thin plates are welded by utilizing resistance heating of the thin plates to be welded, the male die electrode 3 and the female die electrode 17 are controlled to be powered off through the control cabinet 12, the male die electrode 3 is controlled to be lifted upwards at the same time, welding work is completed, the thin plates of the thin plates to be welded are rotated and rubbed through the male die electrode 3, the conductivity of the thin plates to be welded is increased, and therefore the welding efficiency of a spot welding machine is increased.
As an embodiment of the invention, the bottom of the punch electrode 3 is provided with a friction disc 31 made of hard alloy, the bottom of the friction disc 31 is uniformly provided with a group of friction columns 32, the friction disc 31 can reduce the abrasion of the punch electrode 3, and the service life of the resistance electric welding machine is prolonged; through the friction disc 31 and the friction column 32 made of hard alloy, the efficiency of removing the oxide layer on the surface of the thin plate to be welded can be improved, and meanwhile, the abrasion of the male die electrode 3 is avoided, so that the service life of the resistance electric welding machine is prolonged, and the welding efficiency of the spot welding machine is further improved.
As an embodiment of the invention, a first sliding hole 33 is formed in the friction column 32, a copper bar 34 is arranged in the first sliding hole 33, and the copper bar 34 is electrically connected with the male die electrode 3; the conductivity of the friction column 32 can be increased through the copper bar 34, and the welding efficiency of the spot welding machine is further increased; due to the fact that the conductivity of the hard alloy is insufficient, the copper rod 34 arranged in the first sliding hole 33 can increase the conductivity of the friction disc 31, and welding efficiency of the spot welding machine is further improved.
As an embodiment of the invention, an annular air bag 25 is arranged at the upper part of the male die electrode 3 close to the first gear 22, and the air bag 25 is eccentrically sleeved on the male die electrode 3; a first bracket 26 is fixedly connected to the partition plate 21, a top block 27 is arranged on one side, close to the air bag 25, of the first bracket 26, and the top block 27 is used for extruding the air bag 25; a vent hole 35 communicated with the air bag 25 is formed in the male die electrode 3; one end of the male die electrode 3, which is close to the friction disc 31, is provided with a second sliding hole 36, and a copper sliding block 37 is connected in the second sliding hole 36 in a sliding and sealing manner; the sliding block 37 is fixedly connected with the copper bar 34, and the copper bar 34 is in sliding connection with the first sliding hole 33; the vent hole 35 is communicated with the top of the second sliding hole 36; compressed gas generated by the air bag 25 pushes the copper bar 34 to extend out, so that the abrasion of the copper bar 34 is compensated, and the welding efficiency of the spot welding machine is further increased; when the male die electrode 3 rotates, the jacking block 27 continuously extrudes the air bag 25, so that the air bag 25 generates compressed gas, the compressed gas is filled into the second sliding hole 36 through the vent hole 35, and further the sliding block 37 and the copper bar 34 are pressurized, and due to different abrasion speeds of the friction column 32 and the copper bar 34, the compressed gas introduced into the second sliding hole 36 pushes the copper bar 34 to continuously extend out of the first sliding hole 33, so that the abrasion loss of the copper bar 34 is compensated, the copper bar 34 is kept in good electrical contact with a thin plate to be welded, and the welding efficiency of the spot welding machine is further improved.
As an embodiment of the present invention, a group of first holes 38 are formed on the sliding block 37, and a pressure limiting valve 39 is disposed in the first holes 38; a group of second holes 310 are formed in the friction disc 31, and the second holes 310 are communicated with the second sliding holes 36; compressed air in the second sliding hole 36 is sprayed out through the first hole 38 and the second hole 310, so that oxide skin on the surface of a to-be-welded piece is conveniently cleaned, and the welding efficiency of the spot welding machine is further improved; when the air pressure in the second sliding hole 36 is too high, the compressed air in the second sliding hole 36 is sprayed out through the pressure limiting valve 39, the first hole 38 and the second hole 310, and then scale fragments on the thin plate to be welded are cleaned, so that the conductivity of the thin plate to be welded is further increased, meanwhile, the phenomenon that the air pressure in the second sliding hole 36 is too high is prevented, the pressure of the copper rod 34 and the thin plate to be welded is increased, the abrasion of the copper rod 34 is reduced, and the welding efficiency of the spot welding machine is further improved.
As an embodiment of the invention, the lower part of the male die electrode 3 is sleeved with the splash-proof sleeve 4, and the splash-proof sleeve 4 is connected with the male die electrode 3 in a sliding manner; the bottom height of the splash-proof sleeve 4 is lower than that of the friction disc 31; the top of the splash-proof sleeve 4 is provided with a limit ring 41, and a return spring is sleeved on the male die electrode 3 between the limit ring 41 and the partition plate 21; the splash-proof sleeve 4 can reduce metal splash in the welding process, and further improve the welding efficiency of the spot welding machine; when the pressing cylinder 13 pushes the base plate 14 and the male die electrode 3 to move downwards, the splash-proof sleeve 4 firstly contacts and presses the thin plate to be welded, then the male die electrode 3 is matched with the female die electrode 17 to weld the thin plate, welding slag splashing can be reduced through the splash-proof sleeve 4, welding safety is guaranteed, welding quality is improved, and welding efficiency of a spot welding machine is further improved.
When the welding device is used, a sheet to be welded is placed on the female die electrode 17, then the electromagnetic valve is controlled to be opened through the control cabinet 12, so that the pressing cylinder 13 pushes the base plate 14 to move downwards, the base plate 14 drives the shell 2 and the male die electrode 3 to move downwards and approach to the sheet to be welded, at this time, the control cabinet 12 controls the motor 23 to be started, so that the motor 23 drives the male die electrode 3 to rotate through the transmission of the second gear 24 and the first gear 22, at this time, the pressing cylinder 13 continuously pushes the male die electrode 3 to move downwards and contact with the sheet to be welded, the rotating male die electrode 3 rubs and removes an oxide layer on the surface of the sheet to be welded, the conductivity of the sheet to be welded is increased, then the control cabinet 12 controls the motor 23 to stop rotating, and at the same time, the pressing cylinder 13 is controlled to push the male die electrode 3 to extrude the sheet to be welded into the female, the sheets to be welded are riveted, then the male die electrode 3 and the female die electrode 17 are controlled to be electrified through the control cabinet 12, the sheets are welded by utilizing the resistance heating of the sheets to be welded, then the male die electrode 3 and the female die electrode 17 are controlled to be powered off through the control cabinet 12, the male die electrode 3 is controlled to be lifted upwards at the same time, the welding work is further completed, the sheets of the sheets to be welded are rotated and rubbed through the male die electrode 3, the conductivity of the sheets to be welded is increased, and therefore the welding efficiency of a spot welding machine is increased; through the friction disc 31 and the friction column 32 made of hard alloy, the efficiency of removing an oxide layer on the surface of a thin plate to be welded can be improved, and meanwhile, the abrasion of the male die electrode 3 is avoided, so that the service life of the resistance electric welding machine is prolonged, and the welding efficiency of the spot welding machine is further increased; due to the fact that the conductivity of the hard alloy is insufficient, the conductivity of the friction disc 31 can be increased through the copper rod 34 arranged in the first sliding hole 33, and the welding efficiency of the spot welding machine is further improved; when the male die electrode 3 rotates, the jacking block 27 continuously extrudes the air bag 25, so that the air bag 25 generates compressed gas, the compressed gas is filled into the second sliding hole 36 through the vent hole 35, and further exerts pressure on the sliding block 37 and the copper bar 34, and due to different abrasion speeds of the friction column 32 and the copper bar 34, the compressed gas introduced into the second sliding hole 36 pushes the copper bar 34 to continuously extend out of the first sliding hole 33, so that the abrasion loss of the copper bar 34 is compensated, so that the copper bar 34 is kept in good electrical contact with a thin plate to be welded, and the welding efficiency of the spot welding machine is further improved; when the air pressure in the second sliding hole 36 is too high, the compressed air in the second sliding hole 36 is sprayed out through the pressure limiting valve 39, the first hole 38 and the second hole 310, so that oxide scale scraps on the thin plate to be welded are cleaned, the conductivity of the thin plate to be welded is further increased, meanwhile, the situation that the air pressure in the second sliding hole 36 is too high is prevented, the pressure of the copper rod 34 and the thin plate to be welded is increased, the abrasion of the copper rod 34 is reduced, and the welding efficiency of the spot welding machine is further improved; when the pressing cylinder 13 pushes the base plate 14 and the male die electrode 3 to move downwards, the splash-proof sleeve 4 firstly contacts and presses the thin plate to be welded, then the male die electrode 3 is matched with the female die electrode 17 to weld the thin plate, welding slag splashing can be reduced through the splash-proof sleeve 4, welding safety is guaranteed, welding quality is improved, and welding efficiency of a spot welding machine is further improved.
The front, the back, the left, the right, the upper and the lower are all based on the figure 2 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A resistance spot welding method characterized by: the method comprises the following steps:
s1, a prepressing stage, namely placing the plate to be welded between a convex model electrode and a concave model electrode on a resistance electric welding machine for prepressing, wherein in the prepressing stage, the convex model electrode presses the part of the plate to be welded into the concave model electrode under the action of pressure;
s2, in the welding stage, a power supply is switched on to melt and soften the plates to be welded under the action of resistance heat, the interface of the plates to be welded is metallurgically bonded to form connection under the action of melting, the plates to be welded are filled with the concave model electrode under the action of the pressure of the convex model electrode, and the edges of welding points are interlocked under the extrusion action of the outer edge of the convex model electrode and the inner edge of the concave model electrode;
s3, cooling and crystallizing, and forming an interlocking resistance spot welding spot after electrifying is finished and preset pressure is kept;
the resistance electric welding machine adopted by the invention comprises a machine foot (1); the top of the machine leg (1) is fixedly connected with a C-shaped rack (11), a control cabinet (12) is arranged on the side face of the rack (11), a pressing cylinder (13) is arranged on the top of the rack (11), the pressing cylinder (13) is communicated with a high-pressure air source through an electromagnetic valve, and the electromagnetic valve is controlled through the control cabinet (12); a piston feed rod of the compaction cylinder (13) is fixedly connected with a base plate (14), and the bottom of the base plate (14) is fixedly connected with a shell (2); the base plate (14) is connected with the control cabinet (12) through a conductive plate (15); a cylindrical male die electrode (3) is rotationally connected in the shell (2), and the male die electrode (3) is electrically connected with the conductive plate (15); a partition plate (21) is arranged in the shell (2), and the male die electrode (3) penetrates through the partition plate (21) and the shell (2) and then extends to the outside of the shell (2); a first gear (22) is arranged at the upper part of the male die electrode (3); the partition plate (21) is fixedly connected with a motor (23), and the motor (23) is connected with a power supply through a control cabinet (12); an output shaft of the motor (23) is fixedly connected with a second gear (24), and the second gear (24) is meshed with the first gear (22); a workbench (16) is fixedly connected to the middle of the rack (11) and the corresponding position of the base plate (14), a female die electrode (17) is mounted on the workbench (16), the female die electrode (17) is matched with the male die electrode (3), and the female die electrode (17) is electrically connected with the control cabinet (12) through a lead; the male die electrode (3) is driven to rotate by the motor (23), so that an oxide layer of a workpiece to be welded is reduced, the conductivity is increased, and the welding efficiency of the spot welding machine is improved.
2. A resistance spot welding method according to claim 1, wherein: the bottom of the punch electrode (3) is provided with a friction disc (31) made of hard alloy, the bottom of the friction disc (31) is uniformly provided with a group of friction columns (32), the abrasion of the punch electrode (3) can be reduced through the friction disc (31), and the service life of the resistance electric welding machine is prolonged.
3. A resistance spot welding method according to claim 2, wherein: a first sliding hole (33) is formed in the friction column (32), a copper bar (34) is arranged in the first sliding hole (33), and the copper bar (34) is electrically connected with the male die electrode (3); the conductivity of the friction column (32) can be increased through the copper rod (34), and the welding efficiency of the spot welding machine is further increased.
4. A resistance spot welding method according to claim 3, wherein: an annular air bag (25) is arranged at the position, close to the first gear (22), of the upper part of the male die electrode (3), and the air bag (25) is eccentrically sleeved on the male die electrode (3); a first support (26) is fixedly connected to the partition plate (21), a top block (27) is arranged on one side, close to the air bag (25), of the first support (26), and the top block (27) is used for extruding the air bag (25); a vent hole (35) communicated with the air bag (25) is formed in the male die electrode (3); one end of the male die electrode (3) close to the friction disc (31) is provided with a second sliding hole (36), and a copper sliding block (37) is connected in the second sliding hole (36) in a sliding and sealing mode; the sliding block (37) is fixedly connected with the copper bar (34), and the copper bar (34) is in sliding connection with the first sliding hole (33); the vent hole (35) is communicated with the top of the second sliding hole (36); compressed gas generated by the air bag (25) pushes the copper bar (34) to extend out, abrasion of the copper bar (34) is compensated, and welding efficiency of the spot welding machine is further improved.
5. A resistance spot welding method according to claim 4, wherein: a group of first holes (38) are formed in the sliding block (37), and pressure limiting valves (39) are arranged in the first holes (38); a group of second holes (310) are formed in the friction disc (31), and the second holes (310) are communicated with the second sliding holes (36); compressed air in the second sliding hole (36) is sprayed out through the first hole (38) and the second hole (310), so that oxide skin on the surface of a workpiece to be welded can be cleaned conveniently, and the welding efficiency of the spot welding machine is further improved.
6. A resistance spot welding method according to claim 4, wherein: the lower part of the male die electrode (3) is sleeved with a splash-proof sleeve (4), and the splash-proof sleeve (4) is connected with the male die electrode (3) in a sliding manner; the bottom height of the splash-proof sleeve (4) is lower than that of the friction disc (31); the top of the splash-proof sleeve (4) is provided with a limiting ring (41), and a return spring is sleeved on the male die electrode (3) between the limiting ring (41) and the partition plate (21); the splash-proof sleeve (4) can reduce metal splashing in the welding process, and the welding efficiency of the spot welding machine is further improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911019477.3A CN110695507B (en) | 2019-10-24 | 2019-10-24 | Resistance spot welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911019477.3A CN110695507B (en) | 2019-10-24 | 2019-10-24 | Resistance spot welding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110695507A true CN110695507A (en) | 2020-01-17 |
| CN110695507B CN110695507B (en) | 2022-06-24 |
Family
ID=69203227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911019477.3A Active CN110695507B (en) | 2019-10-24 | 2019-10-24 | Resistance spot welding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110695507B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480960A (en) * | 2013-09-18 | 2014-01-01 | 浙江吉利控股集团有限公司 | Welding device with preweld cleaning function and welding method |
| JP2015093283A (en) * | 2013-11-08 | 2015-05-18 | 新日鐵住金株式会社 | Dissimilar metal joining method between steel plate and aluminum alloy plate, and dissimilar metal joining joint |
| CN105364287A (en) * | 2014-08-15 | 2016-03-02 | 通用汽车环球科技运作有限责任公司 | Systems and methods for improving weld strength |
| CN205393767U (en) * | 2016-02-29 | 2016-07-27 | 海盐宏拓五金有限公司 | Spot welding machine |
| CN107160022A (en) * | 2016-03-01 | 2017-09-15 | 通用汽车环球科技运作有限责任公司 | For aluminium workpiece and steel workpiece resistance spot welding match somebody with somebody composite electrode |
| CN107199391A (en) * | 2016-03-17 | 2017-09-26 | 上海梅山钢铁股份有限公司 | A kind of resistance spot welding device and welding method for aluminium-steel xenogenesis sheet material welding |
| CN108406071A (en) * | 2018-02-09 | 2018-08-17 | 大连理工大学 | A kind of thin plate and ultra thin plate resistance spot welding connection method |
| CN208067543U (en) * | 2018-04-10 | 2018-11-09 | 盛裕科技(苏州)有限公司 | Mash welder with safety device |
| WO2019071334A1 (en) * | 2017-10-11 | 2019-04-18 | Magna International Inc. | Welding electrode with radial-serrated weld face and method of forming and reforming weld face |
-
2019
- 2019-10-24 CN CN201911019477.3A patent/CN110695507B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480960A (en) * | 2013-09-18 | 2014-01-01 | 浙江吉利控股集团有限公司 | Welding device with preweld cleaning function and welding method |
| JP2015093283A (en) * | 2013-11-08 | 2015-05-18 | 新日鐵住金株式会社 | Dissimilar metal joining method between steel plate and aluminum alloy plate, and dissimilar metal joining joint |
| CN105364287A (en) * | 2014-08-15 | 2016-03-02 | 通用汽车环球科技运作有限责任公司 | Systems and methods for improving weld strength |
| CN205393767U (en) * | 2016-02-29 | 2016-07-27 | 海盐宏拓五金有限公司 | Spot welding machine |
| CN107160022A (en) * | 2016-03-01 | 2017-09-15 | 通用汽车环球科技运作有限责任公司 | For aluminium workpiece and steel workpiece resistance spot welding match somebody with somebody composite electrode |
| CN107199391A (en) * | 2016-03-17 | 2017-09-26 | 上海梅山钢铁股份有限公司 | A kind of resistance spot welding device and welding method for aluminium-steel xenogenesis sheet material welding |
| WO2019071334A1 (en) * | 2017-10-11 | 2019-04-18 | Magna International Inc. | Welding electrode with radial-serrated weld face and method of forming and reforming weld face |
| CN108406071A (en) * | 2018-02-09 | 2018-08-17 | 大连理工大学 | A kind of thin plate and ultra thin plate resistance spot welding connection method |
| CN208067543U (en) * | 2018-04-10 | 2018-11-09 | 盛裕科技(苏州)有限公司 | Mash welder with safety device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110695507B (en) | 2022-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100743857B1 (en) | Extruvet bonding apparatus and method of metal plates by plasticity flow | |
| CN105458147A (en) | Self-punching bond-riveting connecting device and bond-riveting method | |
| CN102825374B (en) | Double-stroke welding device of copper-aluminum column resistance welder, and welding control method thereof | |
| CN101972889B (en) | Cold-pressure welding process for deformed zinc aluminum alloy rods | |
| CN101934339B (en) | Ring-shaped electro-plastic rivet-free riveting device | |
| CN202147089U (en) | Copper-aluminum dissimilar metal pressure deposition welding machine | |
| CN111195767A (en) | Method for prolonging service life of electrode through ultrasonic-assisted resistance spot welding | |
| CN211839713U (en) | Hardware plate stamping device | |
| CN205599847U (en) | Rivet connecting device from dashing to glue | |
| CN202291795U (en) | Double-stroke welding device of copper-aluminium-post resistance welding machine | |
| CN110695507B (en) | Resistance spot welding machine | |
| CN102825372B (en) | Copper-aluminum column resistance welder and welding control method thereof | |
| CN212822147U (en) | Cutting and stamping device for electronic die | |
| CN109365631A (en) | A kind of electric spark heating metal plate material auxiliary progressive molding device | |
| CN210648061U (en) | Stamping die with replaceable stamping die head | |
| CN217991274U (en) | Workpiece clamping device for ultrasonic welding equipment | |
| CN101486048A (en) | Composite shaping method of metal-based layer-shaped composite board and press forming mold thereof | |
| CN106391743B (en) | A kind of pressurizing unit and method for connecting magnesium alloy and aluminium alloy | |
| CN214022750U (en) | Bending mechanism for stainless steel product production | |
| CN201371171Y (en) | Extrusion forming die for metal-base layered composite plate | |
| CN202162489U (en) | Copper-aluminum column resistance welding machine | |
| CN103801813B (en) | The composite connecting device of pressing sheet material is directly driven based on inversion electric resistance welding and AC servo | |
| CN201482814U (en) | Copper-clad aluminum bus trough isothermal extrusion die | |
| CN206966410U (en) | A kind of bicycle frame pipe end head forming processing unit (plant) of electric car | |
| CN212860590U (en) | Punch press device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220601 Address after: 264000 No. 6, Beijing South Road, Yantai Development Zone, Yantai District, Yantai City (Shandong) pilot Free Trade Zone, Shandong Province Applicant after: Yantai Xinghui LOUSBERG Hydraulic Machinery Co.,Ltd. Address before: 518000 2nd floor, fuzhongfu market, Xixiang street, Bao'an District, Shenzhen City, Guangdong Province Applicant before: Wu Yukun |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 264000 No. 6, Beijing South Road, Yantai Development Zone, Yantai District, Yantai City (Shandong) pilot Free Trade Zone, Shandong Province Patentee after: Shandong Xinghui Hydraulic Equipment Co.,Ltd. Address before: 264000 No. 6, Beijing South Road, Yantai Development Zone, Yantai District, Yantai City (Shandong) pilot Free Trade Zone, Shandong Province Patentee before: Yantai Xinghui LOUSBERG Hydraulic Machinery Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |