CN116833533B - Screw/flange plug-in type resistance welding device with positioning electrode - Google Patents
Screw/flange plug-in type resistance welding device with positioning electrode Download PDFInfo
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- CN116833533B CN116833533B CN202311093119.3A CN202311093119A CN116833533B CN 116833533 B CN116833533 B CN 116833533B CN 202311093119 A CN202311093119 A CN 202311093119A CN 116833533 B CN116833533 B CN 116833533B
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- flange
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- 238000003466 welding Methods 0.000 title claims abstract description 89
- 230000007246 mechanism Effects 0.000 claims abstract description 49
- 230000000670 limiting effect Effects 0.000 claims abstract description 48
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- QZLJNVMRJXHARQ-UHFFFAOYSA-N [Zr].[Cr].[Cu] Chemical compound [Zr].[Cr].[Cu] QZLJNVMRJXHARQ-UHFFFAOYSA-N 0.000 claims description 5
- 238000005056 compaction Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- UNRNJMFGIMDYKL-UHFFFAOYSA-N aluminum copper oxygen(2-) Chemical compound [O-2].[Al+3].[Cu+2] UNRNJMFGIMDYKL-UHFFFAOYSA-N 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000003825 pressing Methods 0.000 description 43
- 238000000034 method Methods 0.000 description 29
- 230000008569 process Effects 0.000 description 22
- 230000000694 effects Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- XTYUEDCPRIMJNG-UHFFFAOYSA-N copper zirconium Chemical compound [Cu].[Zr] XTYUEDCPRIMJNG-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229920000642 polymer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/02—Pressure butt 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
- B23K11/30—Features relating to electrodes
- B23K11/3009—Pressure 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
- B23K11/36—Auxiliary equipment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
Abstract
The invention provides a screw/flange plug-in type resistance welding device with a positioning electrode, which comprises a resistance welding machine body, wherein an upper electrode is connected to an upper support arm of the resistance welding machine body, a connecting lantern ring is fixed on the outer side of the upper electrode, a circumferential adjusting mechanism is connected to the outer side of the connecting lantern ring and comprises an adjusting disc, a gear and a limiting block, a compressing mechanism is fixed at the bottom end of the limiting block and comprises a rectangular cavity, a connecting shaft, a rotating cylinder, an adjusting rod and a compressing rod, a lower electrode is arranged on a lower support arm of the resistance welding machine body, a connecting blind hole is formed in the lower electrode, an insulating bush is arranged in the connecting blind hole, and an electrode cap is arranged on the lower electrode. The invention can utilize the resistance welder body to electrify, the transmission path of welding current is an upper electrode, a screw, a flange, an electrode cap and a lower electrode, contact resistance is formed between the screw and the flange, the flange and the lower electrode cannot be worn, only welding spots are formed between the screw and the flange, and resistance welding of screw heads and the flange is realized.
Description
Technical Field
The invention belongs to the technical field of resistance welding, and particularly relates to a screw/flange plug-in type resistance welding device with a positioning electrode.
Background
Automotive manufacturing is a highly integrated system engineering technology, the structural parts of which typically comprise a large number of threaded connections. The connection structure is a weaker part in the whole structure, the reliability of connection directly influences the safety of the whole machine, and the connection structure is important for ensuring the normal realization of the structure function. The engineering structure works in a complex environment for a long time, which inevitably causes the change of the connection state, such as loosening of bolts or aging of cushion layers. If the development is left at hand, the connection may fail, so that the structural function is lost, and even serious safety accidents are caused. Flange connections are common connection methods used in our assembly, typically for automotive interior pipe, pressure vessels and other heavy duty connections, where the flange is often mounted at a nodal location of a pipe where the pressure is greater than elsewhere in the pipe. Resistance welding is a method of placing a workpiece to be welded between two electrodes, fixing them using a tool, then switching on an electric current, and heating a portion to be welded to a molten or plastic state by using generated resistance heat to complete metal connection.
Spot welding is mainly used for the occasion that metal plates are lapped and the joint has no air tightness or liquid tightness requirement, and is a high-speed and economical connecting method. Traditional screw and flange are fixed by screwing, and the strength of the screw and the flange often cannot meet the high-strength working condition.
Disclosure of Invention
The invention aims at the defects of the prior art, and provides a screw/flange plug-in type resistance welding device with a positioning electrode, wherein welding spots are formed between the screw and the flange through resistance welding, so that the strength of a welding joint is higher than that of common screw fixation.
Specifically, the technical scheme adopted by the invention is as follows: the screw/flange plug-in type resistance welding device with the positioning electrode comprises a resistance welding machine body, wherein an upper electrode is movably connected to an upper support arm of the resistance welding machine body;
a connecting lantern ring is fixed at the position, close to the bottom end, of the outer side of the upper electrode, a circumferential adjusting mechanism is connected to the outer side of the connecting lantern ring, a gear is arranged on the periphery of the circumferential adjusting mechanism, a long gear rod is connected in the resistance welding machine body in a rotating mode, the long gear rod is connected with the gear in a meshed mode, and rotation adjustment of the circumferential adjusting mechanism is completed through rotation of the long gear rod;
four limiting blocks are movably connected in the circumferential adjusting mechanism at equal intervals in a circumferential shape, a pressing mechanism is fixed at the bottom end of each limiting block, a pressing rod is movably connected in the pressing mechanism, and the pressing operation of the circumferential side area of the screw/flange combined surface is completed under the action of the pressing rod;
the lower support arm of the resistance welding machine body is provided with a lower electrode, the center of the lower electrode is embedded with an insulating bush, a screw limiting hole is formed in the middle of the insulating bush, and the top of the lower electrode is also sleeved with an electrode cap; when the screw is inserted into the flange and then inserted into the screw limiting hole from the electrode cap, the flange is positioned on the upper end face of the electrode cap.
As a further explanation of the invention, the top surface of the upper support arm of the resistance welding machine body is provided with a pneumatic cylinder through a positioning rod, the top end of the upper electrode penetrates through the upper support arm of the resistance welding machine body, the top end of the upper electrode is arranged at the vertical movable end of the pneumatic cylinder, and the pneumatic cylinder is externally connected with a pressure sensor.
As a further explanation of the invention, the circumferential adjustment mechanism comprises an adjustment disc, a gear, a strip-shaped through hole, a screw rod, a first conical gear and a limiting block, wherein a reinforcing ring is fixed at the center of the adjustment disc, the reinforcing ring is rotationally connected in a connecting sleeve ring, and the gear is fixed at the outer side of the adjustment disc;
four strip-shaped through holes are formed in the adjusting disc at equal intervals in a circumferential shape, a screw rod is rotatably connected in each strip-shaped through hole through a bearing seat, a first conical gear is fixed at the outer side end of the screw rod, a second conical gear is movably connected in an upper support arm of the resistance welding machine body, and the first conical gear and the second conical gear are matched with each other for use;
the screw rod outside threaded connection has the stopper, stopper sliding connection is in rectangular shape through-hole, just the bottom of stopper extends to the outside department of adjustment disk, the width of stopper is not greater than rectangular shape through-hole's width, just the top of stopper also extends to the top surface of adjustment disk the top of stopper is fixed with the anticreep piece that the width is greater than rectangular shape through-hole width.
As a further explanation of the invention, a hydraulic rod piece is fixed in the upper support arm of the resistance welding machine body, the bottom end of the telescopic shaft of the hydraulic rod piece is connected with a gear driving motor, and the bottom end of the rotating shaft of the gear driving motor is connected with the second bevel gear.
As a further explanation of the invention, the compressing mechanism comprises a rectangular cavity, a connecting shaft, a rotating cylinder, an adjusting rod and a compressing rod, wherein the top end of the rectangular cavity is fixed at the bottom end of a limiting block, the connecting shaft is fixed at one side, close to an upper electrode, of the rectangular cavity, the rotating cylinder is rotatably connected to the outer side of the connecting shaft, the adjusting rod is fixed at one side of the rotating cylinder, the compressing rod is fixed at the other side of the rotating cylinder, the other end of the compressing rod extends to the outer side of the rectangular cavity, a miniature electric push rod is rotatably arranged at one side, far away from the connecting shaft, of the rectangular cavity through a hinge seat, and the top end of a telescopic shaft of the miniature electric push rod is rotatably connected to the other end of the adjusting rod.
As a further explanation of the invention, the bottom side of the rectangular cavity is provided with a limit groove, the compression rod is connected in the limit groove in a sliding way, the bottom end of the compression rod is fixedly provided with a compression ball, when the miniature electric push rod is in a natural state, the compression rod is obliquely arranged at the bottom end of the upper electrode, and when the miniature electric push rod is in a natural state, the bottom end of the compression ball and the bottom surface of the upper electrode are on the same plane.
As a further explanation of the invention, bearing seats are respectively arranged in the upper support arm and the lower support arm of the resistance welding machine body, the top end of the long tooth bar is rotationally connected in the bearing seat of the upper support arm, the bottom end of the long tooth bar is rotationally connected in the bearing seat of the lower support arm, a tooth bar driving motor is also arranged in the lower support arm of the resistance welding machine body, the tooth bar driving motor is in transmission connection with the long tooth bar, and the tooth bar driving motor is a servo motor.
As a further illustration of the present invention, the lower electrode and the upper electrode are both made of a chrome zirconium copper material, and the electrode cap is made of an aluminum oxide copper material.
As a further explanation of the present invention, a clamping groove is provided in the middle of the lower part of the electrode cap, and the clamping groove and the lower electrode adopt: taper fit realizes self-compaction of the two; the upper part in the middle of the electrode cap is also provided with a jack for inserting a screw, and the jack is communicated into the clamping groove.
As a further explanation of the invention, the diameter of the screw limiting hole is larger than the diameter of the screw, the depth is larger than the length of the screw, and the section of the screw limiting hole is of a conical structure with gradually reduced bore diameter from top to bottom.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the upper electrode is lowered to the bottom end of the upper electrode to contact the top end of the screw, the pneumatic cylinder is continuously lowered to the top end of the screw for first compression, then the hydraulic rod is used for driving the gear driving motor to descend, the rotation of the gear driving motor is used for driving the position of the limiting block on the adjusting disc to move and adjust, and the compressing mechanism at the bottom side can be driven to be close to or far away from the upper electrode in the moving process of the limiting block, so that the transverse compressing range of the compressing mechanism can be adjusted, and secondary compression operation can be performed.
2. The invention can drive the adjusting disc to rotate by utilizing the rotation of the toothed bar driving motor, and can drive the four compressing mechanisms connected with the bottom surface to be positioned at different positions above the screw in the rotating process of the adjusting disc, thereby being capable of longitudinally adjusting the positions of the compressing mechanisms, stopping the rotation of the toothed bar driving motor after adjusting the positions of the compressing mechanisms appropriately, selecting the positions of the compressing mechanisms needing to work, controlling the expansion of the miniature electric push rod in the compressing mechanisms, driving the rotating cylinder to rotate by utilizing the adjusting rod in the expanding process of the miniature electric push rod, driving the oblique compressing rod to move outwards, and driving the compressing ball to compress the peripheral area of the surface of the screw cap in the outward moving process, thereby improving the compressing stability in the combined welding process of the screw and the flange.
3. When welding, the screw is inserted into the middle of the flange, and the insulating bush is placed in the lower electrode, so that the impact and the extrusion of the upper electrode to the screw can be prevented from contacting the lower electrode, the contact resistance is formed between the screw and the flange, and the welding point is not formed at the contact point of the flange and the lower electrode, so that the flange and the electrode are not worn, and only the welding point is formed between the screw and the flange. The advantages of electrode structure variability, convenient resistance welding operation, high strength of the formed welding joint and the like are fully utilized, so that the original screw thread combination with low strength can be replaced by the combination effect of welding points and screw threads, and the combination with better strength and performance is obtained.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a top view of the circumferential adjustment mechanism of the present invention;
FIG. 3 is a cross-sectional view of the hold-down mechanism of the present invention;
FIG. 4 is a cross-sectional view of the connecting collar structure of the present invention;
FIG. 5 is a schematic view of the screw/flange combination installation of the present invention;
FIG. 6 is a cross-sectional view of an insulating bushing structure of the present invention;
fig. 7 is a cross-sectional view of the electrode cap structure of the present invention.
Reference numerals illustrate:
1-a resistance welding machine body; 2-a lower electrode; 21-connecting blind holes; 22-insulating bushings; 23-electrode cap; 24-screw limiting holes; 25-clamping grooves; 26-jack; 27-a linear opening; 3-upper electrode; 31-a pneumatic cylinder; 32-positioning rods; 33-a connection collar; 4-a circumferential adjustment mechanism; 41-an adjusting disk; 42-gear; 43-elongated through holes; 44-screw rod; 45-a first bevel gear; 46-limiting blocks; 47-anti-slip member; 48-reinforcing rings; 49-circular lightening holes; 5-a compressing mechanism; 51-rectangular cavity; 52-connecting shaft; 53-rotating the cylinder; 54-adjusting the rod; 55-a miniature electric push rod; 56-a limit groove; 57-hold-down bar; 58-pressing balls; 6-a long toothed bar; 61-a rack bar driving motor; 7-a gear drive motor; 71-hydraulic lever; 72-a second bevel gear; 8-flanges; 9-screw.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 7, the present invention provides a technical solution: the screw/flange plug-in type resistance welding device with positioning electrodes comprises a resistance welding machine body 1, wherein an upper electrode 3 is movably connected to an upper support arm of the resistance welding machine body 1; the pneumatic cylinder 31 is installed through locating lever 32 to the support arm top surface on the resistance welding organism 1, the top of upper electrode 3 runs through the upper support arm of resistance welding organism 1, and the vertical expansion end at pneumatic cylinder 31 is installed on the top of upper electrode 3, pneumatic cylinder 31 still external has pressure sensor, through pressure sensor monitoring pneumatic cylinder 31's compaction pressure, thereby can be convenient for monitor the contact pressure of upper electrode 3 and screw flange combination when compressing tightly for the first time, the size of the compaction force when being convenient for control first time compresses tightly, avoid causing the extrusion damage phenomenon to upper electrode 3.
The connecting lantern ring 33 is fixed at the position, close to the bottom end, of the outer side of the upper electrode 3, the circumferential adjusting mechanism 4 is connected to the outer side of the connecting lantern ring 33, the circumferential adjusting mechanism 4 comprises an adjusting disc 41, a gear 42, a long strip-shaped through hole 43, a screw rod 44, a first conical gear 45 and a limiting block 46, a reinforcing ring 48 is fixed at the circle center of the adjusting disc 41, the reinforcing ring 48 is rotationally connected in the connecting lantern ring 33, the gear 42 is fixed at the outer side of the adjusting disc 41, the long toothed rod 6 is rotationally connected to the resistance welding machine body 1, and the gear 42 which is rotationally connected with the long toothed rod 6 in a meshed connection mode can be driven to rotate through the long toothed rod 6, so that the whole adjusting disc 41 can be driven to rotate.
Bearing seats are respectively arranged in the upper support arm and the lower support arm of the resistance welding machine body 1, the top end of the long tooth bar 6 is rotationally connected in the bearing seat of the upper support arm, the bottom end of the long tooth bar 6 is rotationally connected in the bearing seat of the lower support arm, a tooth bar driving motor 61 is further arranged in the lower support arm of the resistance welding machine body 1, the tooth bar driving motor 61 is in transmission connection with the long tooth bar 6, the tooth bar driving motor 61 is a servo motor, the long tooth bar 6 can be precisely controlled through the tooth bar driving motor 61, the rotation of the adjusting disc 41 can be controlled through the control of the rotation of the long tooth bar 6, and therefore, the position adjustment of the compressing mechanism 5 at the bottom side of the adjusting disc 41 can be completed, and the compressing operation in different directions and in different areas can be completed.
Four strip-shaped through holes 43 are formed in the adjusting disc 41 at equal intervals in a circumferential shape, four round lightening holes 49 are formed in the adjusting disc 41 at equal intervals, the weight of the adjusting disc 41 can be reduced through the strip-shaped through holes 43 and the round lightening holes 49, the service life of equipment can be prolonged, meanwhile, the resistance in the driving process of the long toothed bar 6 is reduced, and long-term use is facilitated.
The screw rod 44 is rotatably connected in each strip-shaped through hole 43 through the bearing seat, the first conical gear 45 is fixed at the outer side end of the screw rod 44, the second conical gear 72 is movably connected in the upper support arm of the resistance welding machine body 1, the first conical gear 45 and the second conical gear 72 are matched with each other for use, when the second conical gear 72 descends to be meshed and connected with the first conical gear 45, the second conical gear 72 can rotate to drive the first conical gear 45, so that when the pressing mechanisms 5 at different positions are driven to the lower parts of the second conical gears 72 in the rotating process of the adjusting disc 41, the second conical gear 72 can be facilitated to drive the adjustment of the pressing ranges of the pressing mechanisms 5 at different positions.
The support arm internal fixation has hydraulic rod 71 on the resistance welding organism 1, hydraulic rod 71's telescopic shaft bottom is connected with gear drive motor 7, gear drive motor 7 is servo motor also, gear drive motor 7's pivot bottom is connected with second bevel gear 72, hydraulic rod 71 goes up and down can drive the meshing between second bevel gear 72 and the first bevel gear 45 of different positions, can drive the rotation of second bevel gear 72 through gear drive motor 7 after the meshing, thereby can accomplish the cooperation use each other of circumference guiding mechanism 4 and hold-down mechanism 5, be convenient for adjust the scope of screw and flange combination welding in-process compress tightly, the flexibility of equipment use has been improved.
The screw rod 44 outside threaded connection has stopper 46, stopper 46 sliding connection is in rectangular shape through-hole 43, and the bottom of stopper 46 extends to the outside department of adjustment dish 41, the width of stopper 46 is not greater than rectangular shape through-hole 43's width, and the top of stopper 46 also extends to the top surface of adjustment dish 41, be fixed with the anticreep piece 47 that the width is greater than rectangular shape through-hole 43's width at the top of stopper 46, when second bevel gear 72 rotates and drives first bevel gear 45 and rotate, first bevel gear 45 can drive screw rod 44 and rotate, thereby can drive the stopper 46 of threaded connection in the screw rod 44 outside to remove in rectangular shape through-hole 43, thereby accomplish the adjustment of stopper 46 in the position of adjustment dish 41.
The bottom end of the limiting block 46 is fixedly provided with a compressing mechanism 5, the compressing mechanism 5 comprises a rectangular cavity 51, a connecting shaft 52, a rotating cylinder 53, an adjusting rod 54 and a compressing rod 57, the top end of the rectangular cavity 51 is fixed at the bottom end of the limiting block 46, one side, close to the upper electrode 3, of the rectangular cavity 51 is fixedly provided with the connecting shaft 52, the outer side of the connecting shaft 52 is rotationally connected with the rotating cylinder 53, one side of the rotating cylinder 53 is fixedly provided with the adjusting rod 54, the other side of the rotating cylinder 53 is fixedly provided with the compressing rod 57, and the other end of the compressing rod 57 extends to the outer side of the rectangular cavity 51;
the miniature electric push rod 55 is rotatably installed on one side, far away from the connecting shaft 52, of the rectangular cavity 51 through the hinging seat, the telescopic shaft top end of the miniature electric push rod 55 is rotatably connected to the other end of the adjusting rod 54, when the miniature electric push rod 55 is opened, the rotating cylinder 53 is driven to rotate clockwise in fig. 3, so that the pressing rod 57 can be driven to rotate clockwise, and as the pressing rod 57 is obliquely arranged, the pressure of a contact object at the bottom of the pressing rod 57 can be increased when the pressing rod 57 rotates clockwise, and secondary pressing operation can be performed.
The limiting groove 56 is formed in the bottom side of the rectangular cavity 51, the pressing rod 57 is slidably connected in the limiting groove 56, the pressing ball 58 is fixed to the bottom end of the pressing rod 57, and the pressing ball 58 is in contact with the top surface of the screw and flange combination when the screw and flange combination is used, so that the pressing ball 58 can be driven by the pressing rod 57 to complete secondary pressing operation of the screw and flange combination.
In order to be convenient for the cooperation and pressing operation, when the miniature electric push rod 55 is in a natural state, the pressing rod 57 is obliquely arranged at the bottom end of the upper electrode 3, and when the miniature electric push rod 55 is in a natural state, the bottom end of the pressing ball 58 and the bottom surface of the upper electrode 3 are on the same plane.
The lower electrode 2 is arranged on the lower support arm of the resistance welding machine body 1, the center of the lower electrode 2 is embedded with an insulating bush 22, a screw limiting hole 24 is arranged in the middle of the insulating bush 22, and an electrode cap 23 is sleeved on the top of the lower electrode 2; when the screw 9 is inserted into the flange 8 and then inserted into the screw limiting hole 24 from the electrode cap 23, the flange 8 is positioned on the upper end surface of the electrode cap 23.
Furthermore, the lower electrode 2 and the upper electrode 3 are both made of chromium-zirconium-copper materials, and the chromium-zirconium-copper belongs to high-strength high-conductivity alloy, and has high strength and good electric and heat conductivity. The concrete upper electrode 3 is a long bar material cut from a chromium zirconium copper bar, the end surface is processed into a conical surface platform, the function of pressing the screw 9 head is achieved, and welding pressure and welding current can be transmitted.
Preferably, the structure of the lower electrode 2 can be designed into two types, one is a deep lower electrode, the other is a shallow lower electrode, and screws with different lengths can be matched through matching of the deep lower electrode and the shallow lower electrode, so that the application range of the device can be widened.
Preferably, the lower electrode 2 is provided in an irregular cylindrical shape, and a blind threaded hole 21 is formed in the upper portion of the lower electrode.
Further, the insulating bush 22 is made of high-strength polymer composite material, preferably epoxy material, and the insulating bush 22 is also divided into a long insulating bush and a short insulating bush which are used in cooperation with the deep lower electrode and the shallow lower electrode, and when in use, the long insulating bush is in threaded connection with the connecting blind hole 21 with the corresponding depth in the deep lower electrode, and the short insulating bush is in threaded connection with the connecting blind hole 21 with the corresponding depth in the shallow lower electrode. The bottom of the insulating bush 22 is also provided with a linear opening 27, and the insulating bush 22 is screwed into the connecting blind hole 21 by adopting a threaded structure, so that the linear opening 27 at the lower part of the insulating bush can play a role in convenient disassembly and replacement. When the insulating bush 22 is completely fitted into the blind connecting hole 21, its tip end should be flush with the upper end of the lower electrode 2.
When welding, the screw 9 is inserted into the middle of the flange 8, the middle of the flange 8 is provided with threads, and as the insulating bush 22 is placed in the lower electrode 2, the impact and extrusion contact of the upper electrode 3 to the screw 9 can be avoided to the lower electrode 2, so that contact resistance is only formed between the screw 9 and the flange 8, the contact point between the flange 8 and the lower electrode 2 is made of stainless steel due to materials, and the lower electrode 2 is made of chromium-zirconium-copper, so that the flange 8 and the electrode cannot be worn, and only the welding point is formed between the screw 9 and the flange 8. The electrode structure variability, the resistance welding operation convenience, the formed welding joint strength higher and other advantages are fully utilized, so that the original screw thread combination with low strength can be replaced by the combination effect of welding points and screw threads, and the combination with better strength and performance is obtained.
Further, the screw limiting holes 24 are formed in the middle of the long insulating bushing and the middle of the short insulating bushing, the diameter of each screw limiting hole 24 is larger than that of each screw 9, the cross section of each screw limiting hole 24 is of a conical structure with gradually reduced bore diameter from top to bottom, the depth is larger than the length of each screw 9, in the welding process, the lower part of each screw 9 is inserted into each screw limiting hole 24, the limiting effect is achieved, and the screws 9 are prevented from inclining and centering under the pressure effect of resistance welding.
Further, the electrode cap 23 is preferably made of alumina copper material, the middle of the lower part of the electrode cap is provided with a clamping groove 25, the section of the clamping groove 25 is of a conical structure with gradually increased caliber from top to bottom, correspondingly, the section of the upper end part of the lower electrode 2 is of a conical structure with gradually reduced outer diameter from bottom to top, and specifically, 1 is adopted between the two: 10 taper fit to make the cooperation joint that draw-in groove 25 can be fine at bottom electrode 2 upper end, realize compressing tightly by oneself, and convenient to detach changes.
The upper middle part of the electrode cap 23 is also provided with a jack 26, the jack 26 is communicated into the clamping groove 25, and the aperture of the jack 26 is equivalent to the aperture of the upper end of the screw limiting hole 24 in the insulating bush 22, so that the screw 9 can be inserted into the screw limiting hole 24 in the insulating bush 22 through the jack 26 in the middle of the electrode cap 23. The upper end of the electrode cap 23 is also provided with a boss, so that the whole electrode cap 23 is similar to a convex shape, the flange 8 can be conveniently placed by the boss, and the flange 8 is tightly contacted with the upper boss surface of the electrode cap 23 in the welding process, so that good electrical contact is formed.
The welding method of the screw/flange plug-in type resistance welding device with the positioning electrode comprises the following steps of:
s1, firstly, an insulating bush 22 is installed in a connecting blind hole 21 of a lower electrode 2, an electrode cap 23 is installed at the top end of the lower electrode 2, a screw 9 is inserted into a central threaded hole of a flange 8, and then the screw 9 is inserted into the insulating bush 22 from a jack 26 of the electrode cap 23, and as a screw limiting hole 24 is formed in the middle of the insulating bush 22, the diameter of the screw limiting hole 24 is larger than that of the screw 9, the screw limiting hole 24 is a conical section, and the depth is larger than the length of the screw 9, so that the screw 9 can be clamped in the screw limiting hole 24 to play a positioning role, and the flange 8 is just positioned on a boss surface on the electrode cap 23;
s2, driving the upper electrode 3 to descend by using the pneumatic cylinder 31, enabling the bottom end of the upper electrode 3 to descend to contact the top end of the screw 9, monitoring the contact pressure by using a pressure sensor externally connected with the pneumatic cylinder 31, continuing to descend the pneumatic cylinder 31 until the pressure sensor reaches a preset pressure value, stopping the pneumatic cylinder 31, and completing primary compression operation of the screw 9 and flange combination;
s3, the hydraulic rod piece 71 is utilized to drive the gear driving motor 7 to descend to the second conical gear 72 to be meshed with the first conical gear 45, the first conical gear 45 can be driven to rotate by means of rotation of the gear driving motor 7, the first conical gear 45 can be driven to move and adjust the position of the limiting block 46 on the adjusting disc 41 in the rotation process, the pressing mechanism 5 on the bottom side can be driven to be close to or far away from an upper electrode in the movement process of the limiting block 46, and therefore the transverse pressing range of the pressing mechanism 5 can be adjusted;
the circumferential adjusting mechanism 4 is adjusted according to the top surface of the screw 9, specifically, the toothed bar driving motor 61 is utilized to rotate to drive the adjusting disc 41 to rotate, and in the rotating process of the adjusting disc 41, the four compressing mechanisms 5 connected with the bottom surface can be driven to be positioned at different positions above the screw 9, so that the positions of the compressing mechanisms 5 can be longitudinally adjusted, the rotation of the toothed bar driving motor 61 is stopped after the position of the compressing mechanisms 5 is adjusted properly, and the position of the compressing mechanism 5 needing to work is selected;
s4, according to the position of the pressing mechanism 5 which is selected to work in the S3, the micro electric push rod 55 in the pressing mechanism 5 is controlled to be unfolded, the adjusting rod 54 can be utilized to drive the rotating cylinder 53 to rotate in the unfolding process of the micro electric push rod 55, so that the inclined pressing rod 57 can be driven to move outwards, the pressing ball 58 can be driven to press the peripheral area of the nail cap surface of the screw 9 in the outward moving process, the secondary circumferential pressing operation of the screw 9 and flange 8 combination is completed, and the pressing stability in the screw 9 and flange 8 combination welding process is improved;
s5, electrifying by using the electric resistance welding machine body 1, and simultaneously, downwards impacting and pressing the nail cap of the contact screw 9 by using the upper electrode 3, or specifically, downwards pressing by using the pneumatic cylinder 31 to drive the upper electrode 3, wherein the upper electrode 3 can synchronously press down the circumferential adjusting mechanism 4 and the pressing mechanism 5 which are connected with the outer side of the upper electrode in the pressing process, at the moment, the pressure of the pressing ball 58 on the surface of the nail cap of the screw 9 is continuously increased due to the increase of the pressure in the pressing process, and the screw 9 is heated and easily deformed due to electrifying, and is close to the flange 8 in the pressing process until the lamination process is realized, so that the electric resistance welding is facilitated;
if pressure is generated between the upper electrode 3 and the screw 9 due to the fact that the pressing rod 57 deforms and contacts again in the continuous pressurizing process, the contact pressure is monitored again through a pressure sensor externally connected with the pneumatic cylinder 31, when the contact pressure is larger than a pressure threshold value, the pneumatic cylinder 31 stops pressing down at the moment, the pressure is reduced after the nail cap surface of the screw 9 is deformed, the pneumatic cylinder 31 is started again to work until the nail cap surface of the screw 9 gradually approaches the flange 8 under the extrusion action until the nail cap surface and the flange 8 are completely attached;
meanwhile, the nut of the screw 9 and the flange 8 form welding spots due to conduction, a welding current transmission path is the upper electrode 3, the nut of the screw 9, the flange 8, the electrode nut 23 and the lower electrode 2, so that contact resistance is formed between the nut of the screw 9 and the flange 8, the welding spots cannot be formed at the contact points of the flange 8 and the lower electrode 2, the flange 8 and the lower electrode 2 cannot be worn, only the welding spots are formed between the screw 9 and the flange 8, resistance welding operation is completed, the variability of an electrode structure is fully utilized, the resistance welding operation is convenient, the formed welding joint has high strength, the original screw joint with low strength can be replaced by the screw joint with screw thread combination effect, and the combination with better strength and performance is obtained, and the welding device is efficient and practical.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A screw/flange insert type resistance welding device with positioning electrodes, characterized in that: the electric resistance welding machine comprises an electric resistance welding machine body (1), wherein an upper electrode (3) is movably connected to an upper support arm of the electric resistance welding machine body (1);
a connecting lantern ring (33) is fixed at the outer side of the upper electrode (3) close to the bottom end, a circumferential adjusting mechanism (4) is connected to the outer side of the connecting lantern ring (33), a gear (42) is arranged on the periphery of the circumferential adjusting mechanism (4), a long gear rod (6) is rotationally connected to the resistance welding machine body (1), the long gear rod (6) is in meshed connection with the gear (42), and rotation adjustment of the circumferential adjusting mechanism (4) is completed through rotation of the long gear rod (6);
four limiting blocks (46) are movably connected in the circumferential adjusting mechanism (4) at equal intervals in a circumferential shape, a compressing mechanism (5) is fixed at the bottom end of each limiting block (46), a compressing rod (57) is movably connected in the compressing mechanism (5), and compressing operation of the peripheral area of the screw/flange combined surface is completed under the action of the compressing rod (57);
the circumferential adjusting mechanism (4) comprises an adjusting disc (41), a gear (42), a strip-shaped through hole (43), a screw rod (44), a first conical gear (45) and a limiting block (46), wherein a reinforcing ring (48) is fixed at the center of the adjusting disc (41), the reinforcing ring (48) is rotationally connected in the connecting sleeve ring (33), and the gear (42) is fixed at the outer side of the adjusting disc (41);
four strip-shaped through holes (43) are formed in the adjusting disc (41) at equal intervals in a circumferential shape, a screw rod (44) is connected in each strip-shaped through hole (43) through a bearing seat in a rotating mode, a first conical gear (45) is fixed at the outer side end of the screw rod (44), a second conical gear (72) is movably connected in an upper support arm of the resistance welding machine body (1), and the first conical gear (45) and the second conical gear (72) are matched with each other for use;
the screw rod (44) is externally connected with a limiting block (46) in a threaded manner, the limiting block (46) is slidably connected in the strip-shaped through hole (43), the bottom end of the limiting block (46) extends to the outer side of the adjusting disc (41), the width of the limiting block (46) is not larger than that of the strip-shaped through hole (43), the top end of the limiting block (46) also extends to the top surface of the adjusting disc (41), and an anti-falling piece (47) with the width larger than that of the strip-shaped through hole (43) is fixed at the top end of the limiting block (46);
the compressing mechanism (5) comprises a rectangular cavity (51), a connecting shaft (52), a rotating cylinder (53), an adjusting rod (54) and a compressing rod (57), wherein the top end of the rectangular cavity (51) is fixed at the bottom end of a limiting block (46), one side, close to an upper electrode (3), of the rectangular cavity (51) is fixedly provided with the connecting shaft (52), the outer side of the connecting shaft (52) is rotationally connected with the rotating cylinder (53), one side of the rotating cylinder (53) is fixedly provided with the adjusting rod (54), the other side of the rotating cylinder (53) is fixedly provided with the compressing rod (57), the other end of the compressing rod (57) extends to the outer side of the rectangular cavity (51), one side, far away from the connecting shaft (52), of the rectangular cavity (51) is rotationally provided with a miniature electric push rod (55) through a hinging seat, and the top end of a telescopic shaft of the miniature electric push rod (55) is rotationally connected with the other end of the adjusting rod (54).
The bottom side of the rectangular cavity (51) is provided with a limit groove (56), the compression rod (57) is slidably connected in the limit groove (56), a compression ball (58) is fixed at the bottom end of the compression rod (57), when the miniature electric push rod (55) is in a natural state, the compression rod (57) is obliquely arranged at the bottom end of the upper electrode (3), and when the miniature electric push rod (55) is in a natural state, the bottom end of the compression ball (58) and the bottom surface of the upper electrode (3) are on the same plane;
the lower electrode (2) is arranged on the lower support arm of the resistance welding machine body (1), an insulating bush (22) is embedded in the center of the lower electrode (2), a screw limiting hole (24) is formed in the middle of the insulating bush (22), and an electrode cap (23) is sleeved at the top of the lower electrode (2); when the screw (9) is inserted into the flange (8) and then is inserted into the screw limiting hole (24) from the electrode cap (23), the flange (8) is positioned on the upper end face of the electrode cap (23).
2. The screw/flange plug-in type resistance welding device with the positioning electrode according to claim 1, wherein a pneumatic cylinder (31) is installed on the top surface of an upper support arm of the resistance welding machine body (1) through a positioning rod (32), the top end of the upper electrode (3) penetrates through the upper support arm of the resistance welding machine body (1), the top end of the upper electrode (3) is installed at the vertical movable end of the pneumatic cylinder (31), and the pneumatic cylinder (31) is externally connected with a pressure sensor.
3. The screw/flange plug-in type resistance welding device with the positioning electrode according to claim 1, wherein a hydraulic rod (71) is fixed in an upper support arm of the resistance welding machine body (1), a gear driving motor (7) is connected to the bottom end of a telescopic shaft of the hydraulic rod (71), and the bottom end of a rotating shaft of the gear driving motor (7) is connected to the second bevel gear (72).
4. The screw/flange plug-in type resistance welding device with the positioning electrode according to claim 1, wherein bearing seats are respectively arranged in an upper support arm and a lower support arm of the resistance welding machine body (1), the top end of the long tooth bar (6) is rotationally connected in the bearing seat of the upper support arm, the bottom end of the long tooth bar (6) is rotationally connected in the bearing seat of the lower support arm, a tooth bar driving motor (61) is further arranged in the lower support arm of the resistance welding machine body (1), the tooth bar driving motor (61) is in transmission connection with the long tooth bar (6), and the tooth bar driving motor (61) is a servo motor.
5. A screw/flange insert type resistance welding apparatus with positioning electrode according to claim 1, characterized in that the lower electrode (2) and the upper electrode (3) are made of chromium zirconium copper material, and the electrode cap (23) is made of aluminum oxide copper material.
6. A screw/flange insert type resistance welding apparatus with positioning electrode according to claim 1, characterized in that a clamping groove (25) is provided in the middle of the lower part of the electrode cap (23), and the clamping groove (25) and the lower electrode (2) adopt 1:10 taper fit, realize the self-compaction of the two; the upper part in the middle of the electrode cap (23) is also provided with a jack (26) for inserting a screw (9), and the jack (26) is communicated into the clamping groove (25).
7. A screw/flange insert type resistance welding apparatus with positioning electrode according to claim 1, characterized in that the diameter of the screw limiting hole (24) is larger than the diameter of the screw (9), the depth of the screw limiting hole (24) is larger than the length of the screw (9), and the cross section of the screw limiting hole (24) is a tapered structure with gradually decreasing aperture from top to bottom.
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| CN202311093119.3A CN116833533B (en) | 2023-08-29 | 2023-08-29 | Screw/flange plug-in type resistance welding device with positioning electrode |
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| CN202311093119.3A CN116833533B (en) | 2023-08-29 | 2023-08-29 | Screw/flange plug-in type resistance welding device with positioning electrode |
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| CN116833533B true CN116833533B (en) | 2023-11-07 |
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| CN116833533A (en) | 2023-10-03 |
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