Intelligent automatic spot welding machine and welding method

Abstract

The present invention discloses an intelligent automatic spot welding machine, including two groups of welding equipment; a feeding robot arm, which is arranged between the two groups of welding equipment; an electric control cabinet, which electrically connects the welding equipment and the feeding robot arm; the welding equipment includes: a welding station; a first spot welding mechanism; a second spot welding mechanism; the first spot welding mechanism and the second spot welding mechanism perform spot welding operations on the products clamped on the welding station. The present invention also discloses a welding method for an intelligent automatic spot welding machine, including the following steps: clamping the product on a spot welding fixture; the spot welding fixture moves to a lifting mechanism, and the lifting mechanism lifts the spot welding fixture; the first spot welding mechanism and the second spot welding mechanism perform spot welding operations respectively; the feeding robot arm takes out the welded product. Due to the use of a double-station form and an automated welding mechanism, the present invention cooperates with the feeding robot arm, and only requires one operator to achieve several times the production capacity of the traditional method, which greatly improves production efficiency and reduces labor costs.

Description

Technical Field

[0001] The invention relates to automation equipment, in particular to a welding method for an intelligent automatic spot welding machine. Background Art

[0002] Tool cabinets used in factories are generally made of metal. Similarly, the drawers used on tool cabinets are also made of metal. Therefore, welding is required when producing tool cabinet drawers to ensure their connection strength. The traditional production method is composed of multiple standard resistance welding machines, single-point welding, and welding is completed by arranging them into lines. Due to its structure, each drawer needs to weld the front and back panels, a total of eight welding points, so a line with 8 stations and 8 operators is required. The production capacity is very low and the labor cost is very high. Summary of the invention

[0003] The main purpose of the present invention is to provide an intelligent automatic spot welding machine and a welding method which can automatically spot weld tool cabinet drawers.

[0004] The present invention proposes an intelligent automatic spot welding machine, comprising: two groups of welding equipment; a material unloading robot arm, which is arranged between the two groups of welding equipment; an electric control cabinet, which is electrically connected to the welding equipment and the material unloading robot arm respectively; the welding equipment comprises: a welding station; a first spot welding mechanism, which is arranged on one side of the welding station; a second spot welding mechanism, which is arranged on the other side of the welding station; the first spot welding mechanism and the second spot welding mechanism perform spot welding operations on the products clamped on the welding station.

[0005] As a further solution of the present invention: the welding station includes: a welding station base; a spot welding fixture track, which is arranged along the length direction of the welding station base, and the spot welding fixture track is arranged on the upper surface of the welding station base near both sides; a spot welding fixture driving device, which is arranged along the length direction of the welding station base, and the spot welding fixture driving device is arranged on the side of the welding station base; a lifting mechanism, which is arranged in the welding station base, and its position corresponds to the first spot welding mechanism and the second spot welding mechanism; a spot welding fixture, which is movably mounted on the spot welding fixture track and can move along the spot welding fixture track, and the spot welding fixture is movably connected to the spot welding fixture driving device through a spot welding fixture connecting block, and when the spot welding fixture is located directly above the lifting mechanism, it can be fixed and lifted by the lifting mechanism.

[0006] As a further solution of the present invention: the lifting mechanism comprises: a lifting mechanism bracket; a lifting mechanism driving motor, fixed on the lifting mechanism bracket; a lifting mechanism movable block, fixed on the lifting mechanism bracket through a slide rail, and the lifting mechanism movable block performs lifting movement on the lifting mechanism bracket; a lifting mechanism screw, connected to the lifting mechanism movable block through a nut, and connected to the lifting mechanism driving motor through a synchronous wheel and synchronous belt, and the lifting mechanism driving motor drives the lifting mechanism screw to rotate, so that the lifting mechanism movable block moves up and down; A lifting mechanism platform is arranged on the top of the lifting mechanism movable block and is used to hold up the spot welding fixture; a lifting mechanism fixed jaw is arranged on the lifting mechanism platform, and when the lifting mechanism platform holds up the spot welding fixture, the fixed jaw moves to fix the spot welding fixture to the lifting mechanism platform; a lifting mechanism positioning device is arranged on the lifting mechanism platform, and before the lifting mechanism platform holds up the spot welding fixture, the spot welding fixture is positioned to ensure that the lifting mechanism fixed jaw can stably clamp the spot welding fixture and ensure stability during lifting.

[0007] As a further solution of the present invention: the spot welding fixture comprises: a fixture bottom plate, the fixture bottom plate is mounted on the spot welding fixture track through a pulley; a fixture movable part comprises: a fixture movable part track, which is arranged on the fixture bottom plate, and the direction of the fixture movable part track is perpendicular to the spot welding fixture track; a fixture movable part mounting plate, which is movably arranged on the fixture movable part track; a fixture movable part triangular connecting block, which is movably arranged on the fixture movable part mounting plate, and its movable direction is perpendicular to the fixture movable part mounting plate. The movable direction is the same; the clamping plate of the movable part of the clamp is vertically fixed on the triangular connecting block of the movable part of the clamp, and can move with the triangular connecting block of the movable part of the clamp; the push-pull cylinder of the movable part of the clamp is fixed on the mounting plate of the movable part of the clamp, and its piston is fixed on the clamping plate of the movable part of the clamp, and can drive the clamping plate of the movable part of the clamp to move; the back clamping plate of the movable part of the clamp is fixed on the mounting plate of the movable part of the clamp, and when the piston of the push-pull cylinder of the movable part of the clamp is pushed out, the clamping plate of the movable part of the clamp and the movable part of the clamp are moved. The back clamp is tightly attached to clamp the workpiece; the fixture fixing part is arranged corresponding to the fixture movable part, including: a fixture fixing part bracket, fixed to the fixture bottom plate; a fixture fixing part clamping plate, fixed to the fixture fixing part bracket, and parallel to the clamping plate of the fixture movable part; a fixture fixing part push-pull cylinder, fixed to the clamp fixing part clamping plate, and its piston penetrates the clamp fixing part clamping plate; a fixture fixing part back clamping plate, movably arranged on the fixture fixing part through the fixture fixing part guide rod, and the fixture fixing part push-pull cylinder The piston is fixed with it, and when the piston of the push-pull cylinder of the clamp fixing part retracts, the back clamp of the clamp fixing part approaches and fits tightly to the clamp fixing part clamp plate; there are four side clamps in total, two in a group, one group is arranged on the mounting plate of the clamp movable part, respectively located on both sides of the clamp movable part clamp plate, and located in the plane where the clamp movable part clamp plate is located; the other group is arranged on the clamp bottom plate, respectively located on both sides of the clamp fixing part clamp plate, and located in the plane where the clamp fixing part clamp plate is located.

[0008] As a further solution of the present invention: the first spot welding mechanism includes: a first spot welding mechanism feed track A, which is arranged on the machine platform and is perpendicular to the welding station; a first spot welding mechanism feed track B, which is arranged on the first spot welding mechanism feed track A and is parallel to the welding station; a first spot welding mechanism feed track C, which is parallel to the welding station and is located above the first spot welding mechanism feed track B; the first spot welding mechanism feed track C and the first spot welding mechanism feed track B are fixed together by a plate and driven by the first spot welding mechanism drive device A to move together on the first spot welding mechanism feed track A; a first spot welding mechanism spot welding gun A, which is arranged One end of the first spot welding mechanism is arranged on the feed track B of the first spot welding mechanism, and the position of the first spot welding mechanism spot welding gun A can be adjusted on the feed track B of the first spot welding mechanism; the first spot welding mechanism spot welding gun B is arranged on the feed track C of the first spot welding mechanism, and the first spot welding mechanism spot welding gun B is movable on the feed track C of the first spot welding mechanism; the first spot welding mechanism spot welding gun C is arranged on the other end of the feed track B of the first spot welding mechanism, and the first spot welding mechanism spot welding gun C is movable on the feed track B of the first spot welding mechanism; the first spot welding mechanism spot welding gun A, the first spot welding mechanism spot welding gun B and the first spot welding mechanism spot welding gun C are horizontally oriented toward the welding station.

[0009] As a further solution of the present invention: the second spot welding mechanism includes: a second spot welding mechanism bracket, which is arranged on the machine platform; a second spot welding mechanism feed track A, which is arranged on the machine platform and is perpendicular to the welding station; a second spot welding mechanism feed track B, which is arranged on the second spot welding mechanism feed track A and is parallel to the welding station; a second spot welding mechanism spot welding gun A, which is arranged at one end of the second spot welding mechanism feed track B, and the second spot welding mechanism spot welding gun A is movable on the second spot welding mechanism feed track B; a second spot welding mechanism spot welding gun B, which is arranged at the other end of the second spot welding mechanism feed track B end, the spot welding gun B of the second spot welding mechanism can be position-adjusted on the second spot welding mechanism feed track B; the second spot welding mechanism feed track C is arranged on the second spot welding mechanism bracket, and its direction is parallel to the welding station; the second spot welding mechanism spot welding gun C is arranged on the second spot welding mechanism feed track C, and the second spot welding mechanism spot welding gun C is movable on the second spot welding mechanism feed track C; the second spot welding mechanism spot welding gun A and the second spot welding mechanism spot welding gun B are horizontally directed toward the welding station, and the second spot welding mechanism spot welding gun C is vertically directed downward, and is used to weld the bending part of the front plate of the product.

[0010] The present invention also provides a welding method of an intelligent automatic spot welding machine, comprising the following steps:

[0011] S100, clamp the product onto the spot welding fixture;

[0012] S200, the spot welding fixture is moved to a lifting mechanism, and the lifting mechanism lifts the spot welding fixture;

[0013] S300, the first spot welding mechanism and the second spot welding mechanism perform spot welding operations respectively;

[0014] S400, the unloading robot arm takes out the welded product.

[0015] As a further solution of the present invention: Step S100 specifically includes the following steps:

[0016] S110, placing the front plate welding portion between the clamping plate of the clamp movable portion and the back clamping plate of the clamp movable portion;

[0017] S120, placing the rear plate welding portion between the clamp fixing portion clamping plate and the clamp fixing portion back clamping plate;

[0018] S130, placing the front plate of the product between the clamping plate of the movable part of the clamp and the back clamping plate of the movable part of the clamp, and clamping them;

[0019] S140, placing the rear plate of the product between the clamping plate of the clamp fixing part and the back clamping plate of the clamp fixing part, and clamping them.

[0020] As a further solution of the present invention: Step S200 specifically includes the following steps:

[0021] S210, the spot welding fixture driving device operates to drive the spot welding fixture clamped with the product to move to the lifting mechanism;

[0022] S220, the lifting mechanism positioning device and the lifting mechanism fixing clamp are started in sequence to accurately fix the spot welding fixture on the lifting mechanism;

[0023] S230, the lifting mechanism driving motor operates to drive the lifting mechanism screw to rotate, and the lifting mechanism platform moves upward to lift the spot welding fixture.

[0024] As a further solution of the present invention: Step S300 specifically includes the following steps:

[0025] S310, the first spot welding mechanism welds the rear plate of the product to the rear plate welding portion;

[0026] S320, the second spot welding mechanism welds the bent portion of the front plate of the product at the bent welding portion;

[0027] S330, the second spot welding mechanism welds the front plate of the product to the front plate welding part.

[0028] The technical effect produced by the present invention: Since the present invention adopts a double-station form and an automated welding mechanism, combined with a robotic arm for unloading, only one operator is needed to achieve several times the production capacity of the traditional method, which greatly improves production efficiency and reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the intelligent automatic spot welding machine provided by the present invention;

[0030] Figure 2 It is a top view of the intelligent automatic spot welding machine provided by the present invention;

[0031] Figure 3 is a schematic diagram of a product produced by the present invention from a first perspective;

[0032] Figure 4 is a schematic diagram of a product produced by the present invention from a second viewing angle;

[0033] Figure 5 yes Figure 4 The enlarged view of point A in the middle;

[0034] Figure 6 It is a structural schematic diagram of a welding station provided by the present invention;

[0035] Figure 7 is a first structural schematic diagram of the lifting mechanism provided by the present invention;

[0036] Figure 8 is a second structural schematic diagram of the lifting mechanism provided by the present invention;

[0037] Fig. 9 is a third structural schematic diagram of the lifting mechanism provided by the present invention;

[0038] Fig.10 is a fourth structural schematic diagram of the lifting mechanism provided by the present invention;

[0039] Fig.11 It is a structural schematic diagram of the fixed clamping claw of the lifting mechanism provided by the present invention;

[0040] Fig.12 It is a structural schematic diagram of the spot welding fixture provided by the present invention;

[0041] Fig.13 is a first structural schematic diagram of the movable portion of the clamp provided by the present invention;

[0042] Fig.14 is a second structural schematic diagram of the movable portion of the clamp provided by the present invention;

[0043] Fig.15 is a third structural schematic diagram of the movable portion of the clamp provided by the present invention;

[0044] Fig.16 is a first structural schematic diagram of a clamp fixing portion provided by the present invention;

[0045] Fig.17 is a second structural schematic diagram of the clamp fixing portion provided by the present invention;

[0046] Fig.18 is a first structural schematic diagram of a first spot welding mechanism provided by the present invention;

[0047] Fig.19 is a second structural schematic diagram of the first spot welding mechanism provided by the present invention;

[0048] Fig. 20 is a first structural schematic diagram of a second spot welding mechanism provided by the present invention;

[0049] Fig.21 is a second structural schematic diagram of a second spot welding mechanism provided by the present invention;

[0050] Fig. 22 It is a structural schematic diagram of a first spot welding mechanism feed track B provided by the present invention;

[0051] Fig.23 It is a structural schematic diagram of a spot welding gun provided by the present invention;

[0052] Fig.24 This is a schematic diagram of the spot welding fixture provided by the present invention clamping the product to be processed;

[0053] Fig.25 It is a structural schematic diagram of the unloading mechanical arm provided by the present invention.

[0054] Reference numerals:

[0055] 100. Welding station;

[0056] 110. Welding station base;

[0057] 111. spot welding fixture track; 112. spot welding fixture driving device;

[0058] 113. Spot welding fixture connection block;

[0059] 120. Lifting mechanism;

[0060] 121. Lifting mechanism bracket; 122. Lifting mechanism driving motor;

[0061] 123. Lifting mechanism movable block; 124. Lifting mechanism screw; 125. Lifting mechanism platform;

[0062] 126. Lifting mechanism fixed jaws;

[0063] 1261, fixed jaw connecting block; 1262, fixed jaw driving cylinder;

[0064] 1263, movable jaws;

[0065] 127. Lifting mechanism positioning device;

[0066] 130. Spot welding fixture;

[0067] 131, fixture bottom plate;

[0068] 132. Clamp movable part;

[0069] 1321, track of the movable part of the fixture; 1322, mounting plate of the movable part of the fixture;

[0070] 1323. Width compensation block; 1324. Triangular connection block of the movable part of the fixture;

[0071] 1325. Clamping plate of the movable part of the fixture; 1326. Push-pull cylinder of the movable part of the fixture;

[0072] 1327. Cylinder mounting frame of the movable part of the clamp; 1328. Back clamp plate of the movable part of the clamp;

[0073] 1329, the movable part of the fixture blocks the cylinder;

[0074] 133, fixture fixing part;

[0075] 1331, clamp fixing part clamp plate; 1332, clamp fixing part bracket;

[0076] 1333, a push-pull cylinder of a fixture fixing part; 1334, a back clamp of a fixture fixing part;

[0077] 1335, guide rod of fixture fixing part;

[0078] 134, side clamp;

[0079] 135. Adjust the hand wheel;

[0080] 136. Pulley;

[0081] 200, a first spot welding mechanism;

[0082] 210, first spot welding mechanism feed track A; 220, first spot welding mechanism feed track B;

[0083] 230, first spot welding mechanism feed track C;

[0084] 240. First spot welding mechanism spot welding gun A;

[0085] 2401, feed drive cylinder;

[0086] 250. Spot welding gun B of the first spot welding mechanism; 260. Spot welding gun C of the first spot welding mechanism;

[0087] 270. First spot welding mechanism driving device C; 280. First spot welding mechanism driving device B;

[0088] 290, first spot welding mechanism driving device A;

[0089] 300, second spot welding mechanism;

[0090] 310, second spot welding mechanism bracket; 320, second spot welding mechanism feed track A;

[0091] 330, feeding track B of the second spot welding mechanism; 340, spot welding gun A of the second spot welding mechanism;

[0092] 350. Spot welding gun B of the second spot welding mechanism; 360. Feed track C of the second spot welding mechanism;

[0093] 370, spot welding gun C of the second spot welding mechanism;

[0094] 400, unloading robot arm;

[0095] 410, multi-axis robotic arm; 420, unloading gripper;

[0096] 421, mounting frame; 422, suction cup mounting block; 423, suction cup;

[0097] 500. Electric control cabinet;

[0098] 600, products;

[0099] 610. Product entity;

[0100] 611, front plate welding part; 612, rear plate welding part; 613, bending welding part;

[0101] 620, product back panel;

[0102] 630, product front panel;

[0103] 631. Bending part of the front panel of the product.

[0104] 700, spot welding gun;

[0105] 710. Telescopic cylinder of spot welding gun; 720. Welding head.

[0106] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0107] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0108] Reference Figure 1-Figure 2 As shown, an intelligent automatic spot welding machine includes: two groups of welding equipment; a material unloading robot arm 400, which is arranged between the two groups of welding equipment; an electric control cabinet 500, which is electrically connected to the welding equipment and the material unloading robot arm 400; the welding equipment includes: a welding station 100; a first spot welding mechanism 200, which is arranged on one side of the welding station 100; a second spot welding mechanism 300, which is arranged on the other side of the welding station 100; the first spot welding mechanism 200 and the second spot welding mechanism 300 perform spot welding operations on the product 600 clamped on the welding station 100. The present invention adopts a double-station form and an automated welding mechanism, and cooperates with the unloading of the robot arm, so that only one operator is required to achieve several times the production capacity of the traditional method, which greatly improves the production efficiency and reduces the labor cost.

[0109] The operator sets the parameters through the electric control cabinet 500, and the equipment can run automatically. The product 600 is clamped at the welding station 100, and the first spot welding mechanism 200 and the second spot welding mechanism 300 perform automatic welding. After the welding is completed, the unloading robot arm 400 takes the finished product out of the welding station 100 and transfers it to the logistics line. The two stations perform welding in turn, so that one operator can control the two stations.

[0110] like Figure 3-Figure 5 As shown, the product 600 is a tool cabinet drawer, which is composed of a product body 610, a product rear plate 620 and a product front plate 630. The product rear plate 620 and the product front plate 630 are respectively welded to the two ends of the product body 610. The places where the product body 610 is connected with the product rear plate 620 and the product front plate 630 are respectively the front plate welding part 611 and the rear plate welding part 612. Its structure is that the edge is folded inward to form a welding plane. It should be noted that the product front plate 630 includes a product front plate bending part 631, which corresponds to the bending welding part 613 on the product body 610. Figure 5 It can be understood that the bent welded portion 613 is the bottom edge of the tool cabinet drawer.

[0111] Specifically, the dimensions of the product 600 are as follows: length: 650mm-805mm; width: 516mm-520mm; height: 115mm-240mm. The present invention adopts a single-sided double-point welding mode for welding, thereby improving welding efficiency. Among them, the size variation range in the length direction is large, and a servo drive is required here to realize the moving welding spot welding of the long side. In the height direction, considering that two sets of welding points are required for the four height direction welding points, and the size variation in the height direction reaches 125mm, if the electrodes of the four corners are moved, the four spot welding guns 700 for welding here need to be servo-moved, which is costly and has a small position space; therefore, it is considered to lift and feed the entire workpiece, and fix the spot welding gun 700. At the same time, the welding points at the corners in the height direction and the length direction are too close to each other, so the four corner welding positions and the length direction welding points are placed at two different welding heights, so that the welding positions are misaligned to achieve welding. The misaligned height is achieved by the lifting mechanism 120 at the bottom of the workpiece.

[0112] like Figure 6 As shown, the welding station 100 includes: a welding station base 110, which can be understood as a frame and is in the shape of a long strip as a whole; a spot welding fixture track 111 having a circular cross-section and arranged along the length direction of the welding station base 110, and the spot welding fixture track 111 is arranged on the upper surface of the welding station base 110 near the two sides. It should be noted that the two sides here refer to the two side surfaces in the length direction of the welding station 100; a spot welding fixture driving device 112, which is arranged along the length direction of the welding station base 110, and the spot welding fixture driving device 112 is arranged on the side of the welding station base 110; a lifting mechanism 120, which is arranged in the welding station base 110, and its position corresponds to the first spot welding mechanism 200 and the second spot welding mechanism 300; a spot welding fixture 130, which is movably mounted on the spot welding fixture track 111 and can be moved along the The spot welding fixture track 111 is movable, and the spot welding fixture 130 is movably connected to the spot welding fixture driving device 112 through the spot welding fixture connecting block 113; when the spot welding fixture 130 is located directly above the lifting mechanism 120, it can be fixed and lifted by the lifting mechanism 120; the movable connection here is understood to mean that the spot welding fixture 130 can be separated from the spot welding fixture connecting block 113 by a lifting action. Specifically, there is a vertically arranged hole on the spot welding fixture 130. Before lifting, the spot welding fixture connecting block 113 is inserted in the hole. When the spot welding fixture driving device 112 is in operation, it can drive the spot welding fixture connecting block 113 to apply tension, thereby driving the spot welding fixture 130 to move. After being lifted, the spot welding fixture connecting block 113 is separated from the hole, and vice versa, it is reinserted. For the movable connection, this is only the best embodiment, and structures that can be separated by lifting action are within the scope.

[0113] like Figure 7-Figure 10As shown, the lifting mechanism 120 includes: a lifting mechanism bracket 121; a lifting mechanism driving motor 122, which is fixed on the lifting mechanism bracket 121; a lifting mechanism movable block 123, which is fixed on the lifting mechanism bracket 121 through a slide rail, and the lifting mechanism movable block 123 performs lifting movement on the lifting mechanism bracket 121; a lifting mechanism screw 124, which is connected to the lifting mechanism movable block 123 through a nut, and is connected to the lifting mechanism driving motor 122 through a synchronous wheel and a synchronous belt, and the lifting mechanism driving motor 122 drives the lifting mechanism screw 124 to rotate, so that the lifting mechanism movable block 123 moves up and down; a lifting mechanism platform 125, which is arranged on the top of the lifting mechanism movable block 123, is used to hold up the spot welding fixture 130; it can be understood that the lifting mechanism 120 works based on the lifting and lowering realized by the screw nut, and the driving source is the lifting mechanism driving motor 122, which can be driven by transmission parts such as synchronous wheels and synchronous belts.

[0114] The lifting mechanism fixed clamp 126 is arranged on the lifting mechanism platform 125. When the lifting mechanism platform 125 lifts the spot welding fixture 130, the fixed clamp 126 moves to fix the spot welding fixture 130 to the lifting mechanism platform 125, ensuring the accurate position of the spot welding fixture 130 during the lifting process. Fig.11 As shown, the fixed jaw 126 of the lifting mechanism includes a fixed jaw connecting block 1261 arranged on the lower surface of the lifting mechanism platform 125, and the fixed jaw driving cylinder 1262 is fixed on the fixed jaw connecting block 1261. The output shaft of the fixed jaw driving cylinder 1262 is connected to the movable jaw 1263. When the output shaft of the fixed jaw driving cylinder 1262 is extended, the movable jaw 1263 flips over to fasten the spot welding fixture 130 to the lifting mechanism platform 125. Otherwise, the movable jaw 1263 is released, and the spot welding fixture 130 can move on the spot welding fixture track 111.

[0115] The lifting mechanism positioning device 127 is disposed on the lifting mechanism platform 125. Before the lifting mechanism platform 125 lifts the spot welding fixture 130, the spot welding fixture 130 is positioned to ensure that the lifting mechanism fixed clamp 126 can stably clamp the spot welding fixture 130 and ensure stability during lifting. Fig. 9 As shown, the lifting and positioning device 127 is specifically a cylinder, which is fixed below the lifting mechanism platform 125, and the piston penetrates the lifting mechanism platform 125. Correspondingly, there is a corresponding positioning hole on the spot welding fixture 130, and the cylinder piston of the lifting and positioning device 127 can just extend into the positioning hole to achieve positioning. At the same time, this positioning method can also play a certain fixing role to prevent the spot welding fixture 130 from moving.

[0116] like Fig.12As shown, the spot welding fixture 130 includes: a fixture base plate 131, the fixture base plate 131 is mounted on the spot welding fixture track 111 through a pulley 136; and a fixture movable part 132 and a fixture fixed part 133 arranged on the fixture base plate 131, the fixture fixed part 133 and the fixture movable part 132 can move relative to each other, so as to adjust the distance between the two. It should be noted that the movable part 132 is the fixture, and the fixture fixed part 133 is fixed on the fixture base plate 131. Among them, the fixture movable part 132 is adjusted by adjusting the hand wheel 135, and the adjusting hand wheel 135 is specifically a screw nut structure, which can manually adjust the position of the fixture movable part 132.

[0117] like Figure 13-15 As shown, the fixture movable part 132 includes: a fixture movable part track 1321, which is arranged on the fixture bottom plate 131, and the direction of the fixture movable part track 1321 is perpendicular to the spot welding fixture track 111; a fixture movable part mounting plate 1322, which is movably arranged on the fixture movable part track 1321; a fixture movable part triangular connecting block 1324, which is movably arranged on the fixture movable part mounting plate 1322, and its moving direction is the same as the moving direction of the fixture movable part mounting plate 1322; a fixture movable part clamping plate 1325, which is vertically fixed on the fixture movable part triangular connecting block 1324, and can move together with the fixture movable part triangular connecting block 1324; the fixture movable part The push-pull cylinder 1326 is fixed to the fixture movable part mounting plate 1322 through the fixture movable part cylinder mounting frame 1327, and its piston is fixed to the fixture movable part clamping plate 1325, which can drive the fixture movable part clamping plate 1325 to move; the fixture movable part back clamping plate 1328 is fixed to the fixture movable part mounting plate 1322, when the piston of the fixture movable part push-pull cylinder 1326 is pushed out, the fixture movable part clamping plate 1325 and the fixture movable part back clamping plate 1328 are tightly attached to clamp the workpiece; the fixture movable part 132 is also provided with a width compensation block 1323, which is used to compensate for the insufficient width of the movable part clamping plate 1325 to meet the clamping requirements of products of different sizes.

[0118] Furthermore, a clamp movable part blocking cylinder 1329 is also provided on the clamp movable part mounting plate 1322, which is used to block the movement of the clamp movable part clamp plate 1325. Specifically, when its piston is extended, it can block the clamp movable part clamp plate 1325 away from the clamp movable part back clamp plate 1328 to ensure that the clamping is not loose.

[0119] like Figure 16-17As shown, the clamp fixing part 133 is arranged corresponding to the clamp movable part 132, including: a clamp fixing part bracket 1332, fixed on the clamp bottom plate 131; a clamp fixing part clamping plate 1331, fixed on the clamp fixing part bracket 1332, and parallel to the clamp movable part clamping plate 1325; a clamp fixing part push-pull cylinder 1333, fixed on the clamp fixing part clamping plate 1331, and its piston penetrates the clamp fixing part clamping plate 1331; a clamp fixing part back clamping plate 1334, movably arranged on the clamp fixing part 1331 through a clamp fixing part guide rod 1335, and the piston of the clamp fixing part push-pull cylinder 1333 is fixed thereto, and when the piston of the clamp fixing part push-pull cylinder 1333 is retracted, the clamp fixing part back clamping plate 1334 approaches and is tightly attached to the clamp fixing part clamping plate 1331;

[0120] like Fig.12 As shown, the spot welding fixture 130 also includes side fixtures 134, which are four in total and are grouped in pairs. One group is arranged on the fixture movable part mounting plate 1322, respectively located on both sides of the fixture movable part clamp 1325, and located in the plane where the fixture movable part clamp 1325 is located; the other group is arranged on the fixture bottom plate 131, respectively located on both sides of the fixture fixed part clamp 1331, and located in the plane where the fixture fixed part clamp 1331 is located.

[0121] like Figure 18-19As shown, the first spot welding mechanism 200 includes: a first spot welding mechanism feed track A210, which is arranged on the machine platform and is perpendicular to the welding station 100; a first spot welding mechanism feed track B220, which is arranged on the first spot welding mechanism feed track A210 and is parallel to the welding station 100; a first spot welding mechanism feed track C230, which is parallel to the welding station 100 and is located above the first spot welding mechanism feed track B220; the first spot welding mechanism feed track C230 and the first spot welding mechanism feed track B220 are fixed together by a plate and driven by the first spot welding mechanism driving device A290 to move together on the first spot welding mechanism feed track A210; a first spot welding mechanism spot welding gun A240, which is arranged on the first spot welding mechanism feed track One end of the spot welding mechanism feed track B220, the first spot welding mechanism spot welding gun A240 can be position-adjusted on the first spot welding mechanism feed track B220; the first spot welding mechanism spot welding gun B250 is arranged on the first spot welding mechanism feed track C230, and the first spot welding mechanism spot welding gun B250 is movable on the first spot welding mechanism feed track C230; the first spot welding mechanism spot welding gun C260 is arranged on the other end of the first spot welding mechanism feed track B220, and the first spot welding mechanism spot welding gun C260 is movable on the first spot welding mechanism feed track B220; the first spot welding mechanism spot welding gun A240, the first spot welding mechanism spot welding gun B250 and the first spot welding mechanism spot welding gun C260 are horizontally oriented toward the welding station 100.

[0122] like Figure 20-21As shown, the second spot welding mechanism 300 includes: a second spot welding mechanism bracket 310, which is arranged on the machine platform; a second spot welding mechanism feed track A320, which is arranged on the machine platform and is perpendicular to the welding station 100; a second spot welding mechanism feed track B330, which is arranged on the second spot welding mechanism feed track A320 and is parallel to the welding station; a second spot welding mechanism spot welding gun A340, which is arranged at one end of the second spot welding mechanism feed track B330, and the second spot welding mechanism spot welding gun A340 is movable on the second spot welding mechanism feed track B330; a second spot welding mechanism spot welding gun B350, which is arranged at the other end of the second spot welding mechanism feed track B330, and the second spot welding mechanism The mechanism spot welding gun B350 can be position-adjusted on the second spot welding mechanism feed track B330; the second spot welding mechanism feed track C360 is arranged on the second spot welding mechanism bracket 310, and its direction is parallel to the welding station 100; the second spot welding mechanism spot welding gun C370 is arranged on the second spot welding mechanism feed track C360, and the second spot welding mechanism spot welding gun C370 is movable on the second spot welding mechanism feed track C360; the second spot welding mechanism spot welding gun A340 and the second spot welding mechanism spot welding gun B350 are horizontally oriented toward the welding station 100, and the second spot welding mechanism spot welding gun C370 is vertically downward, and is used to weld the bending part 631 of the front plate of the product. In the second spot welding mechanism 300, the second spot welding mechanism spot welding gun B350 has the same installation structure as the first spot welding mechanism spot welding gun A240. Taking the first spot welding mechanism spot welding gun A240 as an example, Fig. 22 As shown, the bottom of the first spot welding mechanism spot welding gun A240 is fixed on the movable end of the feed drive cylinder 2401, and the position adjustment is achieved by driving the feed drive cylinder 2401. Further, the above-mentioned spot welding guns include a spot welding gun 700, such as Fig.23 As shown, the spot welding gun 700 includes a spot welding gun telescopic cylinder 710 and a welding head 720 disposed on a movable end of the spot welding gun telescopic cylinder 710 , and the welding head 720 is used for welding.

[0123] Furthermore, if Fig.25 As shown, the unloading robot arm 400 of the present invention includes a multi-axis robot arm 410 and a unloading clamp 420 installed on the active end of the multi-axis robot arm 410. In the present invention, the unloading clamp 420 adopts a suction cup structure, specifically a mounting frame 421 installed on the active end of the multi-axis robot arm 410, and a plurality of suction cup mounting blocks 422 are arranged on the mounting frame 421. Correspondingly, a suction cup 423 is arranged on the suction cup mounting block 422 for grabbing the product. In addition to the suction cup structure, electromagnets, mechanical fingers, etc. can also be used for grabbing.

[0124] The present invention also provides a welding method for an intelligent automatic spot welding machine, which is characterized by comprising the following steps:

[0125] S100, clamping the product 600 onto the spot welding fixture 130;

[0126] S200, the spot welding fixture 130 moves to the lifting mechanism 120, and the lifting mechanism 120 lifts the spot welding fixture 130;

[0127] S300, the first spot welding mechanism 200 and the second spot welding mechanism 300 perform spot welding operations respectively;

[0128] S400, the unloading robot arm 400 takes out the welded product 600.

[0129] Furthermore, step S100 specifically includes the following steps:

[0130] S110, placing the front plate welding portion 611 between the clamp movable portion clamping plate 1325 and the clamp movable portion back clamping plate 1328;

[0131] S120, placing the rear plate welding portion 612 between the clamp fixing portion clamping plate 1331 and the clamp fixing portion back clamping plate 1334;

[0132] S130, placing the product front plate 630 between the clamping plate 1325 of the clamping movable part and the back clamping plate 1328 of the clamping movable part, and clamping them;

[0133] S140, placing the product rear plate 620 between the clamp fixing part clamping plate 1331 and the clamp fixing part back clamping plate 1334, and clamping.

[0134] Furthermore, step S200 specifically includes the following steps:

[0135] S210, the spot welding fixture driving device 112 operates to drive the spot welding fixture 130 clamped with the product 600 to move to the lifting mechanism 120;

[0136] S220, the lifting mechanism positioning device 127 and the lifting mechanism fixing clamp 126 are started in sequence to accurately fix the spot welding fixture 130 on the lifting mechanism 120;

[0137] S230 , the lifting mechanism driving motor 122 operates, driving the lifting mechanism screw 124 to rotate, and the lifting mechanism platform 125 moves upward to lift the spot welding fixture 130 .

[0138] Furthermore, step S300 specifically includes the following steps:

[0139] S310, the first spot welding mechanism 200 welds the product rear plate 620 to the rear plate welding portion 612;

[0140] S320, the second spot welding mechanism 300 welds the bent portion 631 of the front plate of the product to the bent welding portion 613;

[0141] S330 , the second spot welding mechanism 300 welds the product front plate 630 to the front plate welding portion 611 .

[0142] The working principle of the present invention is: two welding stations are set up, so that one station is charged while the other station is welding. The following introduction is based on the function of a single station, and the other station completely replicates the function of the modified station.

[0143] Each workstation equipment has 6 welding positions, each welding position is equipped with a set of welding power supply to ensure that each position can perform discharge welding independently and simultaneously, thereby improving the efficiency of welding production.

[0144] Start the equipment and perform the first set of welding at the four corners; then lift the servo and spot weld the second set of welding spots at the corners (so far, the welding of the four corners is completed);

[0145] At the same time, the spot welding guns in the welding length direction move and weld under their respective servo drives (according to the product length, the long workpiece is welded in four groups with a total of eight welding points, and the short workpiece is welded in three groups with a total of six welding points). The long workpiece servo moves three times to weld eight points, and the short workpiece servo moves twice to weld six points. The equipment is equipped with a multi-axis robotic arm with a set of grippers; after welding, the robot takes the finished part out to the unloading table.

[0146] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An intelligent automatic spot welding machine, characterized by: include: Two sets of welding equipment; A material unloading robot arm (400) is arranged between the two groups of welding equipment; An electric control cabinet (500), electrically connected to the welding equipment and the unloading robot arm (400); The welding equipment comprises: Welding station (100); A first spot welding mechanism (200) is arranged on one side of the welding station (100); A second spot welding mechanism (300) is arranged on the other side of the welding station (100); The first spot welding mechanism (200) and the second spot welding mechanism (300) perform spot welding operations on the product (600) clamped on the welding station (100); The welding station (100) comprises: A welding station base (110); a spot welding fixture track (111), arranged along the length direction of the welding station base (110), the spot welding fixture track (111) being arranged at positions close to both sides of the upper surface of the welding station base (110); a spot welding fixture driving device (112), arranged along the length direction of the welding station base (110), the spot welding fixture driving device (112) being arranged on the side of the welding station base (110); A lifting mechanism (120) is arranged in the welding station base (110), and its position corresponds to the first spot welding mechanism (200) and the second spot welding mechanism (300); A spot welding fixture (130) is movably mounted on the spot welding fixture track (111) and can move along the spot welding fixture track (111); the spot welding fixture (130) is movably connected to the spot welding fixture driving device (112) via a spot welding fixture connecting block (113); when the spot welding fixture (130) is located directly above the lifting mechanism (120), it can be fixed and lifted by the lifting mechanism (120); The lifting mechanism (120) comprises: Lifting mechanism bracket (121); A lifting mechanism driving motor (122) fixed on the lifting mechanism bracket (121); A lifting mechanism movable block (123) is movably fixed to the lifting mechanism bracket (121) via a slide rail, and the lifting mechanism movable block (123) performs lifting movement on the lifting mechanism bracket (121); The lifting mechanism screw rod (124) is connected to the lifting mechanism movable block (123) via a nut, and is transmission-connected to the lifting mechanism drive motor (122) via a synchronous wheel and a synchronous belt, and the lifting mechanism drive motor (122) drives the lifting mechanism screw rod (124) to rotate, thereby causing the lifting mechanism movable block (123) to move up and down; A lifting mechanism platform (125), disposed on the top of the lifting mechanism movable block (123), and used for supporting the spot welding fixture (130); A lifting mechanism fixed clamp (126) is arranged on the lifting mechanism platform (125), and when the lifting mechanism platform (125) lifts the spot welding fixture (130), the fixed clamp (126) moves to fix the spot welding fixture (130) to the lifting mechanism platform (125); A lifting mechanism positioning device (127) is disposed on the lifting mechanism platform (125) and is used to position the spot welding fixture (130) before the lifting mechanism platform (125) lifts the spot welding fixture (130) to ensure that the lifting mechanism fixed clamp (126) can stably clamp the spot welding fixture (130) and ensure stability during lifting; The spot welding fixture (130) comprises: A fixture bottom plate (131), the fixture bottom plate (131) being mounted on the spot welding fixture track (111) via a pulley (136); The fixture movable part (132) comprises: A clamp movable part track (1321) is arranged on the clamp bottom plate (131), and the direction of the clamp movable part track (1321) is perpendicular to the spot welding clamp track (111); A fixture movable part mounting plate (1322) movably disposed on the fixture movable part track (1321); A triangular connecting block (1324) of the clamp movable part, which is movably arranged on the clamp movable part mounting plate (1322), and whose moving direction is the same as that of the clamp movable part mounting plate (1322); The clamp movable part clamp plate (1325) is vertically fixed on the clamp movable part triangular connection block (1324) and can move together with the clamp movable part triangular connection block (1324); The clamp movable part push-pull cylinder (1326) is fixed on the clamp movable part mounting plate (1322), and its piston is fixed on the clamp movable part clamp plate (1325), and can drive the clamp movable part clamp plate (1325) to move; The clamp movable part back plate (1328) is fixed on the clamp movable part mounting plate (1322), and when the piston of the clamp movable part push-pull cylinder (1326) is pushed out, the clamp movable part plate (1325) and the clamp movable part back plate (1328) are tightly attached to clamp the workpiece; The clamp fixing portion (133) is arranged corresponding to the clamp movable portion (132), and comprises: A clamp fixing portion bracket (1332) fixed on the clamp bottom plate (131); The clamp fixing part clamp plate (1331) is fixed on the clamp fixing part bracket (1332) and is parallel to the clamp movable part clamp plate (1325); A clamp fixing part push-pull cylinder (1333) is fixed on the clamp fixing part clamp plate (1331), and its piston penetrates the clamp fixing part clamp plate (1331); The clamp fixing part back clamp plate (1334) is movably arranged on the clamp fixing part clamp plate (1331) via the clamp fixing part guide rod (1335), and the piston of the clamp fixing part push-pull cylinder (1333) is fixed thereto. When the piston of the clamp fixing part push-pull cylinder (1333) retracts, the clamp fixing part back clamp plate (1334) approaches and closely adheres to the clamp fixing part clamp plate (1331); There are four side clamps (134) in total, two in a group, one group is arranged on the clamp movable part mounting plate (1322), respectively located on both sides of the clamp movable part clamp plate (1325), and located in the plane where the clamp movable part clamp plate (1325) is located; the other group is arranged on the clamp bottom plate (131), respectively located on both sides of the clamp fixed part clamp plate (1331), and located in the plane where the clamp fixed part clamp plate (1331) is located.

2. The intelligent automatic spot welding machine according to claim 1, characterized in that: The first spot welding mechanism (200) comprises: A first spot welding mechanism feed track A (210) is arranged on the machine platform and is oriented perpendicular to the welding station (100); A first spot welding mechanism feed track B (220), arranged on the first spot welding mechanism feed track A (210), and having a direction parallel to the welding station (100); A first spot welding mechanism feed track C (230) is parallel to the welding station (100) and is located above the first spot welding mechanism feed track B (220); the first spot welding mechanism feed track C (230) and the first spot welding mechanism feed track B (220) are fixed together by a plate and driven by a first spot welding mechanism driving device A (290) so as to move together on the first spot welding mechanism feed track A (210); A first spot welding mechanism spot welding gun A (240), arranged at one end of the first spot welding mechanism feed track B (220), wherein the first spot welding mechanism spot welding gun A (240) can be positionally adjusted on the first spot welding mechanism feed track B (220); A first spot welding mechanism spot welding gun B (250) is arranged on the first spot welding mechanism feed track C (230), and the first spot welding mechanism spot welding gun B (250) is movable on the first spot welding mechanism feed track C (230); A first spot welding mechanism spot welding gun C (260), arranged at the other end of the first spot welding mechanism feed track B (220), the first spot welding mechanism spot welding gun C (260) being movable on the first spot welding mechanism feed track B (220); The first spot welding mechanism spot welding gun A (240), the first spot welding mechanism spot welding gun B (250) and the first spot welding mechanism spot welding gun C (260) are oriented horizontally toward the welding station (100).

3. The intelligent automatic spot welding machine as claimed in claim 2, characterized in that: The second spot welding mechanism (300) comprises: A second spot welding mechanism bracket (310) is arranged on the machine platform; A second spot welding mechanism feed track A (320) is arranged on the machine platform and is oriented perpendicular to the welding station (100); A second spot welding mechanism feed track B (330), which is arranged on the second spot welding mechanism feed track A (320) and is parallel to the welding station; A second spot welding mechanism spot welding gun A (340), which is arranged at one end of the second spot welding mechanism feed track B (330), and the second spot welding mechanism spot welding gun A (340) is movable on the second spot welding mechanism feed track B (330); A second spot welding mechanism spot welding gun B (350) is arranged at the other end of the second spot welding mechanism feed track B (330), and the second spot welding mechanism spot welding gun B (350) can be adjusted in position on the second spot welding mechanism feed track B (330); A second spot welding mechanism feed track C (360) is arranged on the second spot welding mechanism bracket (310) and is parallel to the welding station (100); A second spot welding mechanism spot welding gun C (370), which is arranged on the second spot welding mechanism feed track C (360), and the second spot welding mechanism spot welding gun C (370) is movable on the second spot welding mechanism feed track C (360); The second spot welding mechanism spot welding gun A (340) and the second spot welding mechanism spot welding gun B (350) are oriented horizontally toward the welding station (100), and the second spot welding mechanism spot welding gun C (370) is oriented vertically downwards and is used for welding the bent portion (631) of the front plate of the product.

4. A welding method for the intelligent automatic spot welding machine as claimed in claim 3, characterized in that: The following steps are involved: S100, clamping the product (600) onto the spot welding fixture (130); S200, the spot welding fixture (130) moves to the lifting mechanism (120), and the lifting mechanism (120) lifts the spot welding fixture (130); S300, the first spot welding mechanism (200) and the second spot welding mechanism (300) respectively perform spot welding operations; S400, the unloading robot arm (400) takes out the welded product (600).

5. The welding method according to claim 4, characterized in that: Step S100 specifically includes the following steps: S110, placing the front plate welding portion (611) between the clamp movable portion clamping plate (1325) and the clamp movable portion back clamping plate (1328); S120, placing the rear plate welding portion (612) between the clamp fixing portion clamping plate (1331) and the clamp fixing portion back clamping plate (1334); S130, placing the product front plate (630) between the clamping plate (1325) of the clamping movable part and the back clamping plate (1328) of the clamping movable part, and clamping them; S140, placing the product rear plate (620) between the clamp fixing part clamping plate (1331) and the clamp fixing part back clamping plate (1334), and clamping.

6. The welding method according to claim 5, characterized in that: Step S200 specifically includes the following steps: S210, the spot welding fixture driving device (112) operates to drive the spot welding fixture (130) clamped with the product (600) to move to the lifting mechanism (120); S220, the lifting mechanism positioning device (127) and the lifting mechanism fixing clamp (126) are started in sequence to accurately fix the spot welding fixture (130) on the lifting mechanism (120); S230, the lifting mechanism driving motor (122) operates to drive the lifting mechanism screw (124) to rotate, and the lifting mechanism platform (125) moves upward to lift the spot welding fixture (130).

7. The welding method according to claim 6, characterized in that: Step S300 specifically includes the following steps: S310, the first spot welding mechanism (200) welds the product rear plate (620) to the rear plate welding portion (612); S320, the second spot welding mechanism (300) welds the bent portion (631) of the front plate of the product to the bent welding portion (613); S330: The second spot welding mechanism (300) welds the product front plate (630) to the front plate welding portion (611).

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