Automatic spot welding device and method for sheet metal forgings

Abstract

The invention discloses an automatic spot welding device and method for sheet metal forgings, and relates to the technical field of sheet metal forgings. According to the automatic spot welding device for the sheet metal forgings, a carrier plate is rotationally connected to an annular guide rail, a containing groove is formed in the outer wall of the carrier plate, a bottom plate of the sheet metal forgings is placed on the containing groove, and a guide pressing wheel and a first vibration assembly are installed on the annular guide rail; according to the metal plate forge piece machining device, through the arrangement of the first vibration assembly, the first vibration assembly drives the knocking head to intermittently vibrate the outer side of a workpiece through rolling of the rolling wheels and the guide rail, the outer side of the metal plate forge piece is driven to vibrate, and therefore the workpiece can be machined, and the machining efficiency is improved. The second vibration assembly enables a knocking plate to generate periodic impact on the inner side of the workpiece through sliding of a guide rod in a concave guide groove in cooperation with a second spring and a third spring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sheet metal forgings, in particular to an automatic spot welding device and method for sheet metal forgings. BACKGROUND

[0002] The existing spot welding device for sheet metal forgings is usually an electric arc welding machine. The electric arc welding machine usually adopts a spot welding method to weld the sheet metal forgings. The electric arc welding machine spot welding is a welding process that uses the high temperature generated by electric arc discharge to instantaneously melt the contact point of the welding rod and the welding piece, thereby forming a local welding spot. However, the spot welding machine has the following problems in the process of welding two workpieces: The existing spot welding machine has the problems of too short welding time or surface contamination of the workpiece when welding two workpieces. The spot welding machine has a virtual welding condition when welding two workpieces. The virtual welding condition cannot be observed by the naked eye, and there is a hidden problem. The workpiece may suddenly fail under long-term stress and harsh environments such as vibration and pulling, such as cracking of the weld during equipment operation, which may cause safety accidents. To solve the above problems, the present application provides an automatic spot welding device and method for sheet metal forgings. SUMMARY

[0003] To solve the problem of virtual welding of the spot welding machine when welding two workpieces, the present application aims to provide an automatic spot welding device and method for sheet metal forgings.

[0004] To solve the above technical problems, the present application adopts the following technical scheme: an automatic spot welding device for sheet metal forgings, comprising a rack, a ring-shaped guide rail, a sheet metal forging and an electric welding machine, the ring-shaped guide rail is installed on the top of the rack, the electric welding machine is installed on the ring-shaped guide rail, the ring-shaped guide rail is rotatably connected with a carrier plate, a placing groove is formed on the outer wall of the carrier plate, and the bottom plate of the sheet metal forging is placed in the placing groove. A guide pressure wheel and a first vibration assembly are installed on the ring-shaped guide rail. The guide pressure wheel, the electric welding machine and the first vibration assembly move along the path of the ring-shaped guide rail. The first vibration assembly vibrates the outer side of the sheet metal forging. The bottom plate of the sheet metal forging protrudes outward from the placing groove. The guide pressure wheel guides and supports the outer side plate of the sheet metal forging. The electric welding machine welds the bottom plate and the outer side plate of the sheet metal forging. Gas cylinders are fixedly connected to the outer walls of both ends of the ring-shaped guide rail. Guide teeth are connected to the output ends of the gas cylinders. A driving assembly is slidably connected to the guide teeth. Second vibration assemblies and pressure applying assemblies are connected to the two sides of the driving assembly. The outer side plate of the sheet metal forging is arranged outside the bottom plate. The guide pressure wheel applies pressure to the outer side plate to form the end of the outer side plate. The driving assembly moves along the direction of the guide tooth piece, the second vibration assembly cooperates with the guide tooth piece, and the sheet metal forging is intermittently collided, and the pressure assembly applies pressure to the inner side of the sheet metal forging during the movement.

[0005] Preferably, the annular guide rail comprises a first motor, a chain wheel and a base plate, the base plate is fixedly connected to the top of the rack, two chain wheels are rotatably connected to the two ends of the base plate respectively, the first motor is installed on the outer wall of the base plate, the output shaft of the first motor is connected with the rotating shaft of the chain wheel, and the chain is connected between the two chain wheels. The base plate is provided with a guide rail, and a plurality of sliding blocks are slidably connected to the guide rail. The guide pressure wheel is rotatably connected to the sliding block, the electric welding machine is installed on the sliding block, the electric welding machine comprises two rotating arms and a welding head, and the first vibration assembly is installed on the sliding block.

[0006] Preferably, the first vibration assembly comprises a roller and a knocking head, the roller is rotatably connected to the sliding block, and the roller is in rolling contact with the guide rail. The rotating shaft of the roller is connected with a first bevel gear, the outer wall of the first bevel gear is engaged with a second bevel gear, the rotating shaft of the second bevel gear is fixedly connected with a mounting block, the outer wall of the second bevel gear is rotatably connected with a connecting rod, and the connecting rod is connected with the outer wall of the sliding block. First bidirectional screws are rotatably connected to the two ends of the mounting block, and the first bidirectional screws are threadedly connected through the movable plate. The inside of the mounting block is slidably connected with a movable plate, the inside of the mounting block is provided with a first spring, the inside of the mounting block is slidably connected with a sliding rod, the first spring is between the movable plate and the sliding rod, and one end of the sliding rod is fixedly connected with a knocking head. The outer wall of the knocking head is provided with a curved surface, and the outer wall of the knocking head is wrapped with rubber.

[0007] Preferably, the pressure assembly comprises a sliding frame, the sliding frame is slidably connected to the guide tooth piece, a micro-cylinder is installed on the sliding frame, a conical block is connected to the output shaft of the micro-cylinder, two movable rods are slidably connected to the two ends of the sliding frame respectively, a fourth spring is arranged on the inner side of the sliding groove of the movable rod, and a wheel is rotatably connected to one end of the movable rod.

[0008] Preferably, the sliding frame is provided with an extension end, the driving assembly comprises a second motor and a gear, the second motor is installed on the extension end of the sliding frame, and the gear is installed on the output shaft of the second motor.

[0009] Preferably, a rack is arranged on the outer wall of the guide tooth piece, and the gear is engaged with the rack.

[0010] Preferably, a groove frame is fixedly connected to the outer wall of the sliding frame, a reciprocating screw is fixedly connected to the outer wall of the gear, a brush is threadedly connected to the outer wall of the reciprocating screw, and the brush is slidably connected to the groove frame.

[0011] Preferably, the second vibration assembly comprises a knocking plate and a guide rod, a plurality of recessed guide grooves are arranged on the guide tooth piece, the guide rod is slidably connected to the inner wall of the recessed guide groove, one end of the guide rod is fixedly connected to a connecting plate, and a second spring for resetting the guide rod is connected between the two connecting plates. One end of the knocking plate is slidably connected to the inside of the guide rod, and a third spring for resetting the knocking plate is installed in the inside of the guide rod.

[0012] Preferably, a moving groove is arranged on the extension end of the sliding frame, two moving blocks are slidably connected to the inner wall of the moving groove, a second bidirectional screw rod is threadedly connected between the two moving blocks, the connecting plate is slidably connected to the inner wall of the moving groove, and the moving blocks push and adjust the connecting plate.

[0013] A method for an automatic spot welding device for sheet metal forgings, comprising the following steps: Step one, place the bottom plate of the sheet metal forging on the placing groove, and the thickness of the bottom plate protrudes outward from the placing groove, and the cylinder controls the guide tooth piece to assist in placing the bottom plate; Step two, place the outer side plate of the sheet metal forging on the outer side of the bottom plate, and one side of the outer side plate is in contact with the carrier plate, and the two guide pressure wheels clamp the outer side plate in cooperation with the protruding bottom plate; Step three, the welding head of the electric welding machine welds the joint between the outer side plate and the bottom plate, and the two rotating arms can adjust the angle of the welding head; Step four, the outer side plate of the sheet metal forging is arranged on the outer side of the bottom plate, the guide pressure wheel applies pressure to the outer side plate to form the end part of the outer side plate, and the welding head welds it; Step five, after welding is completed, the second vibration assembly and the pressure applying assembly are driven by the driving assembly to move on the guide tooth piece, the second vibration assembly and the pressure applying assembly vibrate and test the connection strength of the sheet metal forging, when the ring guide rail runs, the first vibration assembly vibrates the outer side connection of the sheet metal forging; Step six, after vibration testing, the cylinder drives the guide tooth piece, the second vibration assembly, the driving assembly and the pressure applying assembly to move away from the sheet metal forging, and the sheet metal forging is taken out. Compared with the prior art, the method has the following beneficial effects: 1. The first vibration assembly and the second vibration assembly are arranged, the first vibration assembly is in rolling contact with the guide rail through the roller, drives the knocking head to intermittently vibrate the outside of the workpiece, the second vibration assembly utilizes the sliding of the guide rod in the concave guide groove, cooperates with the second spring and the third spring reset, so that the knocking plate generates periodic impact on the inside of the workpiece, when the bonding strength of the virtual welding is insufficient, the welds will fall off to a certain extent, and a small amount of displacement will occur between the outside plate of the sheet metal forging and the bottom plate, thereby solving the problem that the virtual welding of the workpiece cannot be found in time in the prior art, and the arc surface structure of the knocking head and the rubber wrapping layer avoid causing indentations on the surface of the sheet metal forging when knocking, the arc surface structure is matched with the circumferential movement of the knocking head, damage is avoided when the arc surface structure is in contact with the sheet metal forging, and the rubber wrapping layer has a certain buffering effect.

[0014] 2. The pressure applying assembly is arranged, the micro cylinder drives the conical block, the wheel applies adjustable pressure to the inside of the workpiece, simulates the pulling in actual use, and forms a composite stress with the intermittent vibration in effect one, so that the hidden virtual welding of the sheet metal forging is exposed.

[0015] 3. The brush is arranged, the gear drives the reciprocating screw rod to rotate, drives the brush to reciprocate in the groove frame, and removes metal scraps and dust from the inside of the sheet metal forging. DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0018] Figure 2 It is a schematic diagram of the annular guide rail structure of the present application.

[0019] Figure 3 It is a schematic diagram of the placing groove structure of the present application.

[0020] Figure 4 It is a schematic diagram of the sheet metal forging structure of the present application.

[0021] Figure 5 It is a schematic diagram of the guide tooth piece structure of the present application.

[0022] Figure 6 It is a schematic diagram of the second vibration assembly of the present application.

[0023] Figure 7 It is a schematic diagram of the second vibration assembly and the pressure applying assembly of the present application.

[0024] Figure 8 For the present application Figure 7 The structural diagram of A in the present application.

[0025] Figure 9 For the first vibration assembly of the present application.

[0026] In the figure: 1, rack; 2, ring guide rail; 201, first motor; 202, chain wheel; 203, base plate; 204, chain; 205, guide rail; 206, sliding block; 3, air cylinder; 4, pressure guide wheel; 5, guide tooth piece; 501, rack; 502, concave guide groove; 6, first vibration assembly; 601, roller; 602, first bevel gear; 603, second bevel gear; 604, mounting block; 605, movable plate; 606, first bidirectional screw; 607, first spring; 608, knocking head; 7, second vibration assembly; 701, knocking plate; 702, guide rod; 703, second spring; 704, connecting plate; 705, third spring; 8, sheet metal forging; 9, carrier plate; 901, placing groove; 10, driving assembly; 1001, second motor; 1002, gear; 11, pressure applying assembly; 1101, sliding frame; 11010, moving groove; 1102, miniature air cylinder; 1103, conical block; 1104, movable rod; 1105, fourth spring; 1106, wheel; 12, brush; 13, groove frame; 14, second bidirectional screw; 15, moving block; 16, electric welding machine; 17, reciprocating screw. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. EMBODIMENT

[0028] As Figures 1-9 shown, the present application provides an automatic spot welding device for sheet metal forgings, which comprises a rack 1, a ring guide rail 2, sheet metal forgings 8 and an electric welding machine 16. The ring guide rail 2 is installed on the top of the rack 1, and the electric welding machine 16 is installed on the ring guide rail 2. The ring guide rail 2 is rotationally connected with a carrier plate 9, and the outer wall of the carrier plate 9 is provided with a placing groove 901. The bottom plate of the sheet metal forgings 8 is placed in the placing groove 901. The ring guide rail 2 is provided with a pressure guide wheel 4 and a first vibration assembly 6. The pressure guide wheel 4, the electric welding machine 16 and the first vibration assembly 6 move along the path of the ring guide rail 2. The first vibration assembly 6 vibrates the outer side of the sheet metal forgings 8. The bottom plate of the sheet metal forging 8 protrudes outwardly to the placing groove 901, the guide pressure wheel 4 is used for guiding and supporting the outer side plate of the sheet metal forging 8, and the electric welding machine 16 is used for welding the bottom plate and the outer side plate of the sheet metal forging 8; The outer wall of the two ends of the annular guide rail 2 is fixedly connected with the air cylinder 3, the output end of the air cylinder 3 is connected with the guide tooth piece 5, the guide tooth piece 5 is slidably connected with the driving assembly 10, and the two sides of the driving assembly 10 are respectively connected with the second vibration assembly 7 and the pressing assembly 11; The outer side plate of the sheet metal forging 8 is arranged on the outer side of the bottom plate, the guide pressure wheel 4 is used for pressing the outer side plate, and the end part of the outer side plate is formed; The driving assembly 10 moves along the direction of the guide tooth piece 5, the second vibration assembly 7 cooperates with the guide tooth piece 5 to intermittently collide with the sheet metal forging 8, and the pressing assembly 11 presses the inner side of the sheet metal forging 8 during movement.

[0029] The annular guide rail 2 comprises a first motor 201, a chain wheel 202 and a base plate 203, the base plate 203 is fixedly connected to the top of the rack 1, the two chain wheels 202 are rotatably connected to the two ends of the base plate 203, the first motor 201 is installed on the outer wall of the base plate 203, the output shaft of the first motor 201 is connected with the rotating shaft of the chain wheel 202, the chain 204 is connected between the two chain wheels 202, and the rotating shaft of the chain wheel 202 is rotatably connected with the carrier plate 9; The base plate 203 is provided with a guide rail 205, a plurality of sliding blocks 206 are slidably connected to the guide rail 205, and the sliding blocks 206 are fixedly connected with the chain 204; The guide pressure wheel 4 is rotatably connected to the sliding block 206, the electric welding machine 16 is installed on the sliding block 206, the electric welding machine 16 comprises two rotating arms and a welding head, and the first vibration assembly 6 is installed on the sliding block 206; The purpose of such an arrangement is that the first motor 201 drives the chain wheel 202 to rotate, the sliding block 206 is circularly moved on the guide rail 205 through the chain 204, the annular track movement of the guide pressure wheel 4, the electric welding machine 16 and the first vibration assembly 6 is realized, and the rotating shaft of the chain wheel 202 is connected with the carrier plate 9, so that the carrier plate 9 rotates synchronously with the chain 204.

[0030] The first vibration assembly 6 comprises a roller 601 and a knocking head 608, the roller 601 is rotatably connected to the sliding block 206, and the roller 601 is in rolling contact with the guide rail 205; The rotating shaft of the roller 601 is connected with a first bevel gear 602, the outer wall of the first bevel gear 602 is engaged with a second bevel gear 603, the rotating shaft of the second bevel gear 603 is fixedly connected with a mounting block 604, the outer wall of the second bevel gear 603 is rotatably connected with a connecting rod, and the connecting rod is connected with the outer wall of the sliding block 206; Both ends of the mounting block 604 are rotationally connected with a first bidirectional screw rod 606, which is screwed through the movable plate 605; The inside of the mounting block 604 is slidably connected with the movable plate 605, the inside of the mounting block 604 is installed with a first spring 607, the inside of the mounting block 604 is slidably connected with a sliding rod, the first spring 607 is between the movable plate 605 and the sliding rod, one end of the sliding rod is fixedly connected with a knocking head 608; The outer wall of the knocking head 608 is provided with a curved surface, and the outer wall of the knocking head 608 is wrapped with rubber; The purpose of such arrangement is that the roller 601 rolls in contact with the guide rail 205 to drive the first bevel gear 602 to rotate, and the mounting block 604 is driven to rotate through the meshing second bevel gear 603, when the mounting block 604 rotates, the knocking head 608 collides with the outer wall of the metal forging 8, the first spring 607 is compressed and then released again to circulate the next collision, thereby generating intermittent vibration on the metal forging 8; The first bidirectional screw rod 606 drives the movable plate 605 to slide, so that the compression amount of the first spring 607 and the sliding stroke of the knocking head 608 can be adjusted, thereby adjusting the knocking force and the knocking frequency of the knocking head 608, the curved surface of the knocking head 608 and the rubber wrapping layer increase the contact area, reduce the impact pressure, and avoid damaging the surface of the workpiece.

[0031] The pressure applying assembly 11 comprises a sliding frame 1101 slidably connected to the guide tooth piece 5, a micro air cylinder 1102 installed on the sliding frame 1101, a tapered block 1103 connected to the output shaft of the micro air cylinder 1102, and a movable rod 1104 slidably connected to both ends of the sliding frame 1101, a fourth spring 1105 arranged on the inner side of the sliding groove of the movable rod 1104, and a wheel 1106 rotationally connected to one end of the movable rod 1104. The purpose of such arrangement is that the output end of the micro air cylinder 1102 drives the tapered block 1103 to move, thereby pushing the movable rod 1104, so that the movable rod 1104 and the wheel 1106 approach the inner wall of the metal forging 8, the wheel 1106 is arranged to move while applying pressure to the inner wall of the metal forging 8, and the fourth spring 1105 is used for resetting the movable rod 1104.

[0032] The sliding frame 1101 is provided with an extension end, the driving assembly 10 comprises a second motor 1001 and a gear 1002, the second motor 1001 is installed on the extension end of the sliding frame 1101, and the gear 1002 is installed on the output shaft of the second motor 1001; The outer wall of the guide tooth piece 5 is provided with a rack 501, and the gear 1002 is in meshing engagement with the rack 501; The purpose of such an arrangement is that the output shaft of the second motor 1001 of the driving assembly 10 drives the gear 1002 to rotate, the gear 1002 is engaged with the rack 501 of the guide tooth piece 5, and the sliding frame 1101 is driven to move.

[0033] The outer wall of the sliding frame 1101 is fixedly connected with the groove frame 13, the outer wall of the gear 1002 is fixedly connected with the reciprocating screw rod 17, the outer wall of the reciprocating screw rod 17 is threadedly connected with the brush 12, and the brush 12 is slidably connected in the groove frame 13. The purpose of such an arrangement is that when the gear 1002 rotates, the reciprocating screw rod 17 is driven to rotate, the brush 12 is driven to move reciprocatingly in the groove frame 13, and the metal scraps or welding residues on the inner side of the metal plate forging 8 are cleaned. The second vibration assembly 7 comprises a knocking plate 701 and a guide rod 702, the guide tooth piece 5 is provided with a plurality of concave guide grooves 502, the guide rod 702 is slidably connected to the inner wall of the concave guide groove 502, one end of the guide rod 702 is fixedly connected with a connecting plate 704, and the second spring 703 for resetting the guide rod 702 is connected between the two connecting plates 704. One end of the knocking plate 701 is slidably connected in the guide rod 702, and the third spring 705 for resetting the knocking plate 701 is installed in the guide rod 702. The purpose of such an arrangement is that the guide rod 702 is slidably arranged in the concave guide groove 502, is pressed and reset when encountering a protrusion in the groove, is reset by the second spring 703 for the two guide rods 702, and is periodically and reciprocatingly arranged close to the inner side of the metal plate forging 8, so that the knocking plate 701 reciprocatingly knocks the inner side of the metal plate forging 8. The third spring 705 is used for resetting the knocking plate 701 and endowing the knocking plate 701 with elasticity, thereby enhancing the shaking and knocking effect.

[0034] The extension end of the sliding frame 1101 is provided with a moving groove 11010, two moving blocks 15 are slidably connected to the inner wall of the moving groove 11010, the second bidirectional screw rod 14 is threadedly connected between the two moving blocks 15, and the connecting plate 704 is slidably connected to the inner wall of the moving groove 11010. The moving blocks 15 push and adjust the connecting plate 704, the second bidirectional screw rod 14 drives the moving blocks 15, the moving blocks 15 push and adjust the position of the connecting plate 704, the compression amount of the third spring 705 and the movement stroke of the connecting plate 704 are adjusted, the knocking force and the knocking frequency of the knocking plate 701 are adjusted, and the knocking of workpieces of different sizes is adapted. Embodiment

[0035] As shown in Figures 1-9 A method for a metal plate forging automatic spot welding device, the following steps are taken: Step one, the bottom plate of the sheet metal forging 8 is placed on the placing groove 901, the thickness of the bottom plate protrudes outside the placing groove 901, the cylinder 3 controls the guiding tooth piece 5 to assist in placing the bottom plate; Step two, the outer side plate of the sheet metal forging 8 is placed outside the bottom plate, one side of the outer side plate is in contact with the carrier plate 9, and the two pressure guide wheels 4 cooperate with the protruding bottom plate to clamp the outer side plate; Step three, the welding head of the electric welding machine 16 welds the joint of the outer side plate and the bottom plate, and the two rotating arms can adjust the angle of the welding head; Step four, the outer side plate of the sheet metal forging 8 is arranged outside the bottom plate, the pressure guide wheel 4 applies pressure to the outer side plate, the end of the outer side plate is shaped, and the welding head welds it; Step five, after welding is completed, the second vibration assembly 7 and the pressure assembly 11 are driven by the driving assembly 10 to move on the guiding tooth piece 5, the second vibration assembly 7 and the pressure assembly 11 vibrate and press test the connection strength of the sheet metal forging 8, when the ring-shaped guide rail 2 runs, the first vibration assembly 6 vibrates the outer side connection of the sheet metal forging 8; Step six, after vibration test, the cylinder 3 drives the guiding tooth piece 5, the second vibration assembly 7, the driving assembly 10 and the pressure assembly 11 to move away from the sheet metal forging 8, and the sheet metal forging 8 is taken out.

[0036] Working principle: the first motor 201 drives the chain wheel 202 to rotate, the chain 204 drives the sliding block 206 to move circularly on the guide rail 205, realizes the ring-shaped track movement of the pressure guide wheel 4, the electric welding machine 16 and the first vibration assembly 6, the rotating shaft of the chain wheel 202 is connected with the carrier plate 9, so that the carrier plate 9 rotates synchronously with the chain 204; The bottom plate of the sheet metal forging 8 is placed in the placing groove 901 of the carrier plate 9, the thickness of the bottom plate protrudes outside the groove, and a supporting surface is formed; The cylinder 3 pushes the guiding tooth piece 5 to assist in positioning the bottom plate, and the pressure guide wheel 4 cooperates with the protruding bottom plate to clamp the outer side plate, the workpiece is fixed by friction force to avoid displacement during welding, the two rotating arms of the electric welding machine 16 can adjust the angle of the welding head to adapt to the welding point requirements at different positions; The sliding block 206 drives the welding head to move along the ring-shaped guide rail 2, and each point of the joint of the bottom plate and the outer side plate is welded, the high-temperature electric arc melts the contact points to form welding points; The roller 601 rolls in contact with the guide rail 205, drives the first bevel gear 602 to rotate, drives the mounting block 604 to rotate through the meshing second bevel gear 603, when the mounting block 604 rotates, the knocking head 608 collides with the outer wall of the sheet metal forging 8, compresses the first spring 607 and then releases again to cycle the next collision, and intermittent vibration is generated on the sheet metal forging 8; The first bidirectional screw rod 606 drives the sliding of the movable plate 605, the compression amount of the first spring 607 and the sliding stroke of the knocking head 608 can be adjusted, so that the knocking force and the knocking frequency of the knocking head 608 are adjusted, the curved surface of the knocking head 608 and the rubber wrapping layer increase the contact area, the impact pressure is reduced, and the workpiece surface is prevented from being damaged; The output shaft of the second motor 1001 of the driving assembly 10 drives the rotation of the gear 1002, the gear 1002 is engaged with the rack 501 of the guide tooth piece 5, when the sliding frame 1101 is driven to move, the guide rods 702 slide in the concave guide grooves 502, are extruded and reset when encountering the protrusions in the grooves, the two guide rods 702 are reset through the second springs 703, and periodic reciprocating approaching the inner side of the metal forging 8 is generated, so that the knocking plate 701 reciprocally knocks the inner side of the metal forging 8; the third spring 705 is used for resetting the knocking plate 701 and simultaneously endowing the knocking plate 701 with elasticity, and the shaking and knocking effect is enhanced; The second bidirectional screw rod 14 drives the moving block 15, the moving block 15 drives the position of the adjusting connecting plate 704, the compression amount of the third spring 705 and the movable stroke of the connecting plate 704 are adjusted, so that the knocking force and the knocking frequency of the knocking plate 701 are adjusted, and the knocking of workpieces of different sizes is adapted; When the gear 1002 rotates, the reciprocating screw rod 17 is driven to rotate, so that the brush 12 reciprocally moves in the groove frame 13, and metal scraps or welding residues on the inner side of the metal forging 8 are cleaned. The output end of the micro air cylinder 1102 drives the conical block 1103 to move, so that the movable rod 1104 is pushed, the movable rod 1104 and the wheel 1106 approach the inner wall of the metal forging 8, the wheel 1106 is arranged, and the wheel 1106 can move while applying pressure to the inner wall of the metal forging 8, the micro air cylinder 1102 is arranged, so that the applied pressure can be adjusted, and the fourth spring 1105 is used for resetting the movable rod 1104.

[0037] The standard parts used in the present application can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection modes of the parts are all conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment are all conventional types in the prior art, the circuit connection is connected in the conventional mode in the prior art, and details are not described herein.

[0038] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technologies thereof, the present application also intends to include these modifications and variations.

Claims

1. An automatic spot welding device for sheet metal forgings, comprising a frame (1), a ring guide (2), a sheet metal forging (8) and an electric welding machine (16), wherein the ring guide (2) is installed on the top of the frame (1), and the electric welding machine (16) is installed on the ring guide (2), characterized in that: A carrier plate (9) is rotatably connected to the annular guide rail (2). A placement groove (901) is provided on the outer wall of the carrier plate (9). The bottom plate of the sheet metal forging (8) is placed on the placement groove (901). The annular guide rail (2) is equipped with a pressure roller (4) and a first vibration component (6). The pressure roller (4), the welding machine (16) and the first vibration component (6) move along the path of the annular guide rail (2). The first vibration component (6) vibrates the outer side of the sheet metal forging (8). The bottom plate of the sheet metal forging (8) protrudes outward from the placement groove (901), the guide roller (4) is used to guide and support the outer plate of the sheet metal forging (8), and the electric welding machine (16) welds the bottom plate and the outer plate of the sheet metal forging (8). A cylinder (3) is fixedly connected to the outer wall of both ends of the annular guide rail (2). A guide tooth (5) is connected to the output end of the cylinder (3). A drive assembly (10) is slidably connected to the guide tooth (5). A second vibration assembly (7) and a pressure application assembly (11) are connected to both sides of the drive assembly (10). The outer side plate of the sheet metal forging (8) is set on the outer side of the base plate, and the guide roller (4) applies pressure to the outer side plate to form the end of the outer side plate; The drive assembly (10) moves along the direction of the guide tooth (5), and the second vibration assembly (7) cooperates with the guide tooth (5) to intermittently collide with the sheet metal forging (8). During the movement, the pressure application assembly (11) applies pressure to the inner side of the sheet metal forging (8).

2. An apparatus for the automatic spot welding of sheet metal workpieces as defined in claim 1, characterized in that The annular guide rail (2) includes a first motor (201), a sprocket (202) and a base plate (203). The base plate (203) is fixedly connected to the top of the frame (1). The two sprockets (202) are rotatably connected to the two ends of the base plate (203). The first motor (201) is mounted on the outer wall of the base plate (203). The output shaft of the first motor (201) is connected to the rotating shaft of the sprocket (202). A chain (204) is connected between the two sprockets (202). The rotating shaft of the sprocket (202) is rotatably connected to the carrier plate (9). A guide rail (205) is provided on the substrate (203), and a plurality of sliders (206) are slidably connected on the guide rail (205). The sliders (206) are fixedly connected to the chain (204). The pressure guide wheel (4) is rotatably connected to the slider (206), the welding machine (16) is mounted on the slider (206), the welding machine (16) includes two rotating arms and a welding head, and the first vibration component (6) is mounted on the slider (206).

3. An apparatus for the automated spot welding of sheet metal workpieces as defined in claim 2, wherein, The first vibration component (6) includes a roller (601) and a striking head (608). The roller (601) is rotatably connected to the slider (206), and the roller (601) makes rolling contact with the guide rail (205). A first bevel gear (602) is connected to the shaft of the roller (601), a second bevel gear (603) meshes with the outer wall of the first bevel gear (602), a mounting block (604) is fixedly connected to the shaft of the second bevel gear (603), and a connecting rod is rotatably connected to the outer wall of the second bevel gear (603), and the connecting rod is connected to the outer wall of the slider (206). The mounting block (604) is rotatably connected to two ends of a first bidirectional screw (606), which passes through the movable plate (605) for threaded connection. The mounting block (604) is internally slidably connected to a movable plate (605), and a first spring (607) is installed inside the mounting block (604). A sliding rod is internally slidably connected to the mounting block (604). The first spring (607) is located between the movable plate (605) and the sliding rod. A striking head (608) is fixedly connected to one end of the sliding rod. The outer wall of the striking head (608) is provided with an arc surface, and the outer wall of the striking head (608) is wrapped with rubber.

4. An apparatus for the automatic spot welding of sheet metal workpieces as defined in claim 3, wherein The pressure application assembly (11) includes a sliding frame (1101), which is slidably connected to the guide gear (5). A miniature cylinder (1102) is mounted on the sliding frame (1101). A conical block (1103) is connected to the output shaft of the miniature cylinder (1102). Movable rods (1104) are slidably connected to both ends of the sliding frame (1101). A fourth spring (1105) is provided inside the groove of the movable rod (1104). A wheel (1106) is rotatably connected to one end of the movable rod (1104).

5. An apparatus for the automatic spot welding of sheet metal workpieces as defined in claim 4, wherein The sliding frame (1101) is provided with an extension end, and the drive assembly (10) includes a second motor (1001) and a gear (1002). The second motor (1001) is mounted on the extension end of the sliding frame (1101), and the gear (1002) is mounted on the output shaft of the second motor (1001).

6. An apparatus for the automated spot welding of sheet metal workpieces as defined in claim 5, wherein, A rack (501) is provided on the outer wall of the guide tooth (5), and the gear (1002) meshes with the rack (501).

7. An apparatus for the automated spot welding of sheet metal workpieces as defined in claim 6, wherein, A slot frame (13) is fixedly connected to the outer wall of the sliding frame (1101), a reciprocating screw (17) is fixedly connected to the outer wall of the gear (1002), a brush (12) is threadedly connected to the outer wall of the reciprocating screw (17), and the brush (12) is slidably connected to the slot frame (13).

8. An apparatus for the automated spot welding of sheet metal workpieces as defined in claim 7, wherein, The second vibration assembly (7) includes a striking plate (701) and a guide rod (702). The guide tooth (5) is provided with a plurality of concave guide grooves (502). The guide rod (702) is slidably connected to the inner wall of the concave guide groove (502). One end of the guide rod (702) is fixedly connected to a connecting plate (704). A second spring (703) for resetting the guide rod (702) is connected between the two connecting plates (704). One end of the knocking plate (701) is slidingly connected in the interior of a guide rod (702), and the interior of the guide rod (702) is provided with a third spring (705) for resetting the knocking plate (701).

9. An apparatus for the automated spot welding of sheet metal workpieces as defined in claim 8, wherein, The extension end of the sliding frame (1101) is provided with a moving groove (11010), the inner wall of the moving groove (11010) is slidingly connected with two moving blocks (15), the second bidirectional screw rod (14) is threadedly connected between the two moving blocks (15), and the connecting plate (704) is slidingly connected to the inner wall of the moving groove (11010). The moving blocks (15) push and adjust the connecting plate (704).

10. A method for the automatic spot welding of sheet metal forgings according to any one of claims 1-9, characterized in that, The following steps are: Step one, place the bottom plate of the sheet metal forging (8) on the placing groove (901), and the thickness of the bottom plate protrudes outside the placing groove (901), the cylinder (3) controls the guide tooth piece (5) to assist in placing the bottom plate; Step two, place the outer side plate of the sheet metal forging (8) on the outside of the bottom plate, and the side of the outer side plate is in contact with the carrier plate (9), and the two guide pressure wheels (4) clamp the outer side plate in cooperation with the protruding bottom plate; Step three, the welding head of the electric welding machine (16) welds the joint of the outer side plate and the bottom plate, and the two rotating arms can adjust the angle of the welding head; Step four, the outer side plate of the sheet metal forging (8) is arranged outside the bottom plate, the guide pressure wheel (4) applies pressure to the outer side plate, and the end of the outer side plate is shaped, and the welding head welds it; Step five, after welding, the second vibration assembly (7) and the pressing assembly (11) are driven by the driving assembly (10) to move on the guide tooth piece (5), the second vibration assembly (7) and the pressing assembly (11) vibrate and press test the connection strength of the sheet metal forging (8), and when the ring guide rail (2) operates, the first vibration assembly (6) vibrates the outer side connection of the sheet metal forging (8); Step six, after the vibration test, the cylinder (3) drives the guide tooth piece (5), the second vibration assembly (7), the driving assembly (10) and the pressing assembly (11) to move away from the sheet metal forging (8), and the sheet metal forging (8) is taken out.

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