An automatic welding device for metal sheets and its welding method

Abstract

The present invention relates to the technical field of metal sheet welding. The present invention discloses an automatic welding device for metal sheets and its welding method, including a first support table. A second support table is fixed on one side of the first support table. An extrusion block is fixed on one side of the upper end surface of the second support table. A feeding mechanism is fixed on the other side of the upper end surface of the second support table. The feeding mechanism is fixed at the inner top of the bracket, and the feeding mechanism is connected to the other side of the moving frame. For the automatic welding device for metal sheets, when the pen barrel is placed on the clamping seat, it needs to be abutted against the first piston. The turntable rotates counterclockwise, and the first movable block moves upward under the extrusion of the extrusion bar. The two clamping plates in each group move and approach each other under the action of the first toothed plate, the gear and the second toothed plate. The second spring and the clamping block are used in combination to clamp and fix the pen barrel. When the pen barrel rotates to the rear side of the upper end surface of the turntable, it is still in the clamped state, making the subsequent welding operation more stable.

Description

Technical Field

[0001] The present invention relates to the technical field of metal sheet welding, and specifically relates to an automatic welding device for metal sheets and a welding method thereof. Background Technique

[0002] At present, tablet computers are generally equipped with electronic pens, and the electronic pens usually use a metal pipe as the base body. Due to the size problem of the electronic pen, the pipe wall and pipe diameter are usually relatively small. In order to fix or assemble other components, a metal sheet needs to be welded to the inner wall surface of the pipe, so a welding device is required.

[0003] The existing welding devices generally only perform clamping and limiting treatment on the pipes during feeding, and the clamping effect is poor, which will affect the stability and accuracy of subsequent welding operations. It is inconvenient to automatically perform precise positioning treatment on the metal sheets before welding the metal sheets. The metal sheets are not closely attached to the inner wall of the pipes, which will cause the welding to be not firm. And after the welding operation is completed, manual feeding is generally required, and the degree of automation is not high, thus affecting the work efficiency. In view of the above problems, the existing equipment needs to be improved. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic welding device for metal sheets and a welding method thereof, so as to solve the problems in the above-mentioned background technique that the existing welding devices generally only perform clamping and limiting treatment on the pipes during feeding, and the clamping effect is poor, which will affect the stability and accuracy of subsequent welding operations. It is inconvenient to automatically perform precise positioning treatment on the metal sheets before welding the metal sheets. The metal sheets are not closely attached to the inner wall of the pipes, which will cause the welding to be not firm. And after the welding operation is completed, manual feeding is generally required, and the degree of automation is not high, thus affecting the work efficiency.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: an automatic welding device for metal sheets and a welding method thereof, including a first support table, an extrusion strip is fixed on the upper end surface of the first support table, a first motor is fixed inside the first support table, and the top of the first motor is connected to a clamping mechanism. The clamping mechanism includes a turntable, a clamping seat is fixed on the upper end surface of the turntable, a clamping plate is slidably connected to the upper end surface of the turntable, the inner side of the clamping plate is connected to a clamping block through a second spring, and the clamping block penetrates through the clamping plate.

[0006] A support is fixed on the upper end surface of the first support table. The lower side of the inner top of the support is connected to a moving frame through an electric telescopic column. A welding machine and a protective cover are fixed on the front side of the moving frame. A feeding mechanism is fixed on the inner top of the support, and the feeding mechanism is connected to one side of the moving frame.

[0007] On one side of the first support platform, a second support platform is fixed. On one side of the upper end surface of the second support platform, a pressing block is fixed. On the other side of the upper end surface of the second support platform, a feeding mechanism is fixed. The feeding mechanism is fixed to the inner top of the bracket, and the feeding mechanism is connected to the other side of the moving frame.

[0008] Preferably, a groove is formed in the turntable, and a moving plate is slidably connected in the groove. A first movable block is fixed to the bottom of the moving plate, and the first movable block is connected to the bottom of the turntable through a first spring. A ball is movably connected to the bottom of the first movable block.

[0009] Preferably, first toothed plates are fixed to both sides of the upper end surface of the moving plate, and a gear is meshed with one side of the first toothed plate. The gear is rotatably connected in the groove, and second toothed plates are meshed with the top and the bottom of the gear. The clamping plate is fixed to the outside of the second toothed plate. A sliding groove is formed in the upper end surface of the turntable, and the clamping plate is slidably connected in the sliding groove.

[0010] Preferably, a first oil cylinder is fixed in the turntable, and the upper side of the inner bottom of the first oil cylinder is connected to a first piston through a third spring. The first piston is slidably connected in the first oil cylinder, and the first piston penetrates through the top of the first oil cylinder and the upper end surface of the turntable. A second oil cylinder is fixed in the turntable. The first oil cylinder is connected to two second oil cylinders through a first connecting pipe, and a second piston is slidably connected in the second oil cylinder. The second piston penetrates through the top of the second oil cylinder and the upper end surface of the turntable.

[0011] Preferably, the blanking mechanism includes a third oil cylinder, and the third oil cylinder is fixed to the inner top of the bracket. A third piston is slidably connected in the third oil cylinder, and the third piston is connected to one side of the moving frame through a first connecting frame. A fixing frame is fixed to the upper end surface of the first support platform, and a fourth oil cylinder is fixed to one side of the fixing frame. The top of the fourth oil cylinder is connected to the bottom of the third oil cylinder through a second connecting pipe, and a fourth piston is slidably connected in the fourth oil cylinder.

[0012] Preferably, the fourth piston penetrates through the bottom of the fourth oil cylinder and is connected to a first sliding rail. A pressing frame is fixed to one side of the first sliding rail. A second motor is fixed to the front side of the first sliding rail, and the output end of the second motor is connected to a lead screw. A pushing plate is threadedly connected to the outside of the lead screw, and the pushing plate is slidably connected in the first sliding rail.

[0013] Preferably, the feeding mechanism includes a fifth oil cylinder, and the fifth oil cylinder is fixed to the other side of the upper end surface of the second support platform. A sixth oil cylinder is fixed to the inner top of the bracket, and the bottom of the sixth oil cylinder is connected to one side of the fifth oil cylinder through a third connecting pipe. A fifth piston is slidably connected in the sixth oil cylinder, and the fifth piston is connected to the other side of the moving frame through a second connecting frame.

[0014] Preferably, a sixth piston is slidably connected in the fifth oil cylinder, and the sixth piston penetrates through the other side of the fifth oil cylinder and is connected to the second slide rail. A limiting post is fixed in the second slide rail, and the lower side of the inner top of the second slide rail is connected to the second movable block through a fourth spring. The second movable block is slidably connected in the second slide rail, and the limiting post penetrates through the second movable block.

[0015] Preferably, support rods are symmetrically fixed on both sides of one end face of the second movable block, and two clamping grooves are formed in the upper end faces of the support rods.

[0016] An automatic welding method for metal sheets includes the following steps:

[0017] S1. Place the pen barrel on the card seat and abut it against the second piston. Place the metal sheet into the clamping groove. The turntable rotates counterclockwise. The first movable block is squeezed by the squeezing strip and moves upward. The moving plate and the two first toothed plates move upward. The gear rotates to drive the two second toothed plates to move. The two clamping plates approach each other. The second spring and the clamping block are used in combination to clamp and fix the pen barrel.

[0018] S2. After the pen barrel rotates to the lower side of the protective cover, the moving frame, the welding machine and the protective cover move downward as a whole. The protective cover covers the pen barrel. The two support rods respectively extend into the corresponding pen barrels. The second movable block finally moves upward under the squeezing action of the squeezing block. The two support rods move upward, so that the metal sheet fits against the inner top of the pen barrel. Then use the welding machine to weld the metal sheet on the pen barrel. After the welding operation is completed, the welding machine, the protective cover and the two support rods are removed.

[0019] S3. When the pen barrel rotates to the left side of the upper end face of the turntable, the clamping block releases the clamping of the pen barrel. The pressing frame moves downward to press the first piston. The two second pistons move downward and retract into the turntable. Then the push plate moves backward and pushes the pen barrel off the card seat, facilitating automatic blanking. While blanking the previous pen barrel, the next pen barrel is welded.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The automatic welding device for metal sheets can achieve the purpose of clamping and fixing. When placing the pen barrel on the card seat, it needs to be abutted against the first piston. There are four groups of card seats, and each group of card seats has two. Two pen barrels can be welded at a time. The turntable rotates counterclockwise. When the pen barrel rotates to the right side of the upper end face of the turntable, the first movable block is squeezed by the squeezing strip and moves upward. The two clamping plates in each group move and approach each other under the action of the first toothed plate, the gear and the second toothed plate. The second spring and the clamping block are used in combination to clamp and fix the pen barrel. When the pen barrel rotates to the rear side of the upper end face of the turntable, it is still in the clamped state, making the subsequent welding operation more stable.

[0022] 2. The automatic welding device for metal sheets can achieve the purposes of automatic fitting and positioning and isolation protection. Two clamping grooves are provided on each support rod, and one metal sheet can be clamped in each clamping groove. When the moving frame, welding machine, and protective cover move downward as a whole, the fifth piston and the second connecting frame move downward, the sixth piston, the second slide rail, the second movable block, and the two support rods move leftward. The two support rods respectively extend into the corresponding pen barrels. Then, the second movable block is pushed upward by the extrusion block, and the two support rods move upward, enabling the metal sheets to be attached to the inner walls of the pen barrels, making the subsequent welding operation more precise and tight. The protective cover can play a role in isolation and protection during the welding process.

[0023] 3. The automatic welding device for metal sheets can achieve the purposes of automatic blanking and continuous and efficient welding. When the pen barrel rotates to the left side of the upper end face of the turntable, the clamp releases the clamping of the pen barrel. When the moving frame moves downward, the third piston and the first connecting frame move downward, the fourth piston, the first slide rail, the pressing frame, and the push plate move downward. The first piston is pushed downward by the pressing frame, and the two second pistons move downward and are withdrawn. Then, the push plate moves backward, facilitating automatic blanking. While blanking the previous pen barrel, the welding process can be carried out on the next pen barrel, making the entire operation more continuous and efficient. Description of the Drawings

[0024] Figure 1 It is a front view three-dimensional structure schematic diagram of the present invention;

[0025] Figure 2 It is a right view three-dimensional structure schematic diagram of the present invention;

[0026] Figure 3 It is a front view sectional structure schematic diagram of the present invention;

[0027] Figure 4 It is a structure schematic diagram of the clamping mechanism of the present invention;

[0028] Figure 5 It is a structure schematic diagram of the feeding mechanism of the present invention;

[0029] Figure 6 It is of the present invention Figure 4 The enlarged structure schematic diagram at A in;

[0030] Figure 7 It is of the present invention Figure 5 The enlarged structure schematic diagram at B in;

[0031] Figure 8 It is a connection structure schematic diagram of the first support platform, extrusion strip, and first motor of the present invention;

[0032] Figure 9 It is a connection structure schematic diagram of the turntable, first movable block, and ball of the present invention;

[0033] Figure 10 Schematic diagram of the connection structure of the turntable, card seat, clamping plate, clamping block, first piston and second piston of the present invention;

[0034] Figure 11 Schematic diagram of the connection structure of the turntable, first movable block, first connecting pipe, second oil cylinder and second piston of the present invention;

[0035] Figure 12 Schematic diagram of the connection structure of the first oil cylinder, first piston, first connecting pipe, second oil cylinder and second piston of the present invention;

[0036] Figure 13 Schematic diagram of the connection structure of the first oil cylinder, third spring, first piston and first connecting pipe of the present invention;

[0037] Figure 14 Schematic diagram of the connection structure of the moving frame, welding machine and protective cover of the present invention;

[0038] Figure 15 Schematic diagram of the structure of the blanking mechanism of the present invention.

[0039] In the figure: 1. First support platform; 2. Extrusion strip; 3. First motor; 4. Clamping mechanism; 401. Turntable; 402. Card seat; 403. Groove; 404. Moving plate; 405. First movable block; 406. First spring; 407. Ball; 408. First toothed plate; 409. Gear; 410. Second toothed plate; 411. Clamping plate; 412. Chute; 413. Second spring; 414. Clamping block; 415. First oil cylinder; 416. Third spring; 417. First piston; 418. First connecting pipe; 419. Second oil cylinder; 420. Second piston; 5. Bracket; 6. Electric telescopic column; 7. Moving frame; 8. Welding machine; 9. Protective cover; 10. Blanking mechanism; 1001. Third oil cylinder; 1002. Third piston; 1003. First connecting frame; 1004. Second connecting pipe; 1005. Fourth oil cylinder; 1006. Fixed frame; 1007. Fourth piston; 1008. First slide rail; 1009. Pressing frame; 1010. Second motor; 1011. Lead screw; 1012. Pusher plate; 11. Second support platform; 12. Extrusion block; 13. Feeding mechanism; 1301. Fifth oil cylinder; 1302. Third connecting pipe; 1303. Sixth oil cylinder; 1304. Fifth piston; 1305. Second connecting frame; 1306. Sixth piston; 1307. Second slide rail; 1308. Limit post; 1309. Fourth spring; 1310. Second movable block; 1311. Support rod; 1312. Card slot. Detailed implementation manners

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figures 1 - 15 The present invention provides a technical solution: an automatic welding device for metal sheets, comprising a first support platform 1, an extrusion strip 2 is fixed to the upper end surface of the first support platform 1, a first motor 3 is fixed inside the first support platform 1, the top of the first motor 3 is connected to a clamping mechanism 4, the clamping mechanism 4 comprises a turntable 401, a clamping seat 402 is fixed to the upper end surface of the turntable 401, a clamping plate 411 is slidably connected to the upper end surface of the turntable 401, the inner side of the clamping plate 411 is connected to a clamping block 414 through a second spring 413, and the clamping block 414 passes through the clamping plate 411.

[0042] A bracket 5 is fixed to the upper end surface of the first support platform 1, and the lower side of the inner top of the bracket 5 is connected to the movable frame 7 through an electric telescopic column 6. A welding machine 8 and a protective cover 9 are fixed to the front side of the movable frame 7. A unloading mechanism 10 is fixed to the inner top of the bracket 5, and the unloading mechanism 10 is connected to one side of the movable frame 7.

[0043] A second support platform 11 is fixed on one side of the first support platform 1, an extrusion block 12 is fixed on one side of the upper end surface of the second support platform 11, and a loading mechanism 13 is fixed on the other side of the upper end surface of the second support platform 11. The loading mechanism 13 is fixed on the inner top of the bracket 5, and the loading mechanism 13 is connected to the other side of the movable frame 7.

[0044] In this embodiment, Figure 3 , Figure 4 , Figure 6 , Figure 8 and Figure 9 As shown, a groove 403 is provided in the turntable 401, and a movable plate 404 is slidably connected in the groove 403, a first movable block 405 is fixed to the bottom of the movable plate 404, and the first movable block 405 is connected to the bottom of the turntable 401 through a first spring 406, and a ball 407 is movably connected to the bottom of the first movable block 405, and the turntable 401 can rotate counterclockwise under the action of the first motor 3, when the first movable block 405 is squeezed by the squeezing bar 2 and moves upward, the movable plate 404 moves upward accordingly, and when the first movable block 405 is not squeezed, it will automatically pop open under the action of the first spring 406, and the movable plate 404 moves downward accordingly, and when the first movable block 405 is squeezed, the ball 407 rolls, which is convenient for reducing friction.

[0045] In this embodiment, Figure 1 ,Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown in Figure 6 , on both sides of the upper end face of the moving plate 404, first toothed plates 408 are fixed. And on one side of the first toothed plate 408, a gear 409 is meshed and connected. The gear 409 is rotatably connected in the groove 403. And on the top and bottom of the gear 409, second toothed plates 410 are meshed and connected. The clamping plate 411 is fixed on the outside of the second toothed plate 410. A chute 412 is formed on the upper end face of the turntable 401. The clamping plate 411 is slidably connected in the chute 412. When the moving plate 404 moves up and down, it will drive the first toothed plate 408 to move up and down, thereby driving the gear 409 to rotate. The two second toothed plates 410 move, and the two second toothed plates 410 approach or move away from each other, and the clamping plate 411 will clamp or release the pen barrel. The chute 412 plays a role in limiting during the sliding process of the clamping plate 411.

[0046] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 10 , Figure 11 , Figure 12 and Figure 13 As shown in Figure 13 , a first oil cylinder 415 is fixed in the turntable 401. And on the upper side of the inner bottom of the first oil cylinder 415, it is connected to a first piston 417 through a third spring 416. The first piston 417 is slidably connected in the first oil cylinder 415. And the first piston 417 penetrates through the top of the first oil cylinder 415 and the upper end face of the turntable 401. A second oil cylinder 419 is fixed in the turntable 401. The first oil cylinder 415 is connected to two second oil cylinders 419 through a first connecting pipe 418. And a second piston 420 is slidably connected in the second oil cylinder 419. The second piston 420 penetrates through the top of the second oil cylinder 419 and the upper end face of the turntable 401. When placing the pen barrel, it is necessary to abut the pen barrel against the second piston 420 for convenient positioning. The first connecting pipe 418 plays a role in connecting the first oil cylinder 415 and the two second oil cylinders 419. The first oil cylinder 415 stores hydraulic oil. When the first piston 417 is squeezed and moves downward, the two second pistons 420 move downward and withdraw under the action of the oil pressure. When the first piston 417 is not squeezed, it will automatically bounce up under the action of the third spring 416, and the two second pistons 420 also automatically reset.

[0047] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 14 and Figure 15As shown, the blanking mechanism 10 includes a third oil cylinder 1001, and the third oil cylinder 1001 is fixed to the inner top of the bracket 5. A third piston 1002 is slidably connected inside the third oil cylinder 1001, and the third piston 1002 is connected to one side of the moving frame 7 through a first connecting frame 1003. A fixed frame 1006 is fixed to the upper end surface of the first support platform 1, and a fourth oil cylinder 1005 is fixed to one side of the fixed frame 1006. The top of the fourth oil cylinder 1005 is connected to the bottom of the third oil cylinder 1001 through a second connecting pipe 1004. A fourth piston 1007 is slidably connected inside the fourth oil cylinder 1005. The second connecting pipe 1004 serves to connect the third oil cylinder 1001 and the fourth oil cylinder 1005. When the moving frame 7 moves downward, it will drive the first connecting frame 1003 and the third piston 1002 to move downward. Hydraulic oil is stored in the third oil cylinder 1001, and the fourth piston 1007 will move downward under the action of oil pressure.

[0048] In this embodiment, as Figure 1 , Figure 2 , Figure 3 and Figure 15 shown, the fourth piston 1007 penetrates the bottom of the fourth oil cylinder 1005 and is connected to the first slide rail 1008. A pressing frame 1009 is fixed to one side of the first slide rail 1008. A second motor 1010 is fixed to the front side of the first slide rail 1008, and the output end of the second motor 1010 is connected to a lead screw 1011. A push plate 1012 is threadedly connected to the outside of the lead screw 1011, and the push plate 1012 is slidably connected inside the first slide rail 1008. When the fourth piston 1007 moves downward, it will drive the first slide rail 1008 and the pressing frame 1009 to move downward. The pressing frame 1009 presses the first piston 417, and the two second pistons 420 move downward and are withdrawn. The lead screw 1011 can rotate under the action of the second motor 1010. At this time, the push plate 1012 can slide backward under the limiting action of the first slide rail 1008 and the lead screw 1011, facilitating automatic blanking.

[0049] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 7As shown, the loading mechanism 13 includes a fifth oil cylinder 1301, and the fifth oil cylinder 1301 is fixed to the other side of the upper end surface of the second support platform 11. A sixth oil cylinder 1303 is fixed to the inner top of the bracket 5, and the bottom of the sixth oil cylinder 1303 is connected to one side of the fifth oil cylinder 1301 through a third connecting pipe 1302. A fifth piston 1304 is slidably connected in the sixth oil cylinder 1303, and the fifth piston 1304 is connected to the other side of the moving frame 7 through a second connecting frame 1305. The third connecting pipe 1302 serves to connect the fifth oil cylinder 1301 and the sixth oil cylinder 1303. When the moving frame 7 moves downward, it will drive the second connecting frame 1305 and the fifth piston 1304 to move downward.

[0050] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 7 shown, a sixth piston 1306 is slidably connected in the fifth oil cylinder 1301, and the sixth piston 1306 penetrates through the other side of the fifth oil cylinder 1301 and is connected to the second slide rail 1307. A limiting column 1308 is fixed in the second slide rail 1307, and the lower side of the inner top of the second slide rail 1307 is connected to a second movable block 1310 through a fourth spring 1309. The second movable block 1310 is slidably connected in the second slide rail 1307, and the limiting column 1308 penetrates through the second movable block 1310. The fifth oil cylinder 1301 stores hydraulic oil. When the fifth piston 1304 moves downward, the sixth piston 1306 moves leftward under the action of the oil pressure, and when the second movable block 1310 is squeezed, it will move upward. The limiting column 1308 plays a role in limiting the second movable block 1310.

[0051] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 7 shown, two support rods 1311 are symmetrically fixed on both sides of one end face of the second movable block 1310, and two card slots 1312 are provided on the upper end face of the support rods 1311 for clamping metal sheets. When the sixth piston 1306 moves leftward, it will drive the second slide rail 1307, the second movable block 1310 and the two support rods 1311 to move leftward. The two support rods 1311 respectively extend into the corresponding pen barrels. When the second movable block 1310 is squeezed by the squeezing block 12 and moves upward, the two support rods 1311 move upward accordingly, so that the metal sheets can be attached to the welding positions of the pen barrels, and then the welding operation can be completed by using the welding machine 8.

[0052] According to another aspect of the present invention, an automatic welding method for metal sheets is provided, including the following steps:

[0053] S1. Place the pen barrel on the card seat 402 and lean it against the second piston 420. Put the metal sheet into the card slot 1312. Rotate the turntable 401 counterclockwise. The first movable block 405 is squeezed by the extrusion bar 2 and moves upward. The moving plate 404 and the two first toothed plates 408 move upward. The gear 409 rotates to drive the two second toothed plates 410 to move. The two clamping plates 411 approach each other. The second spring 413 and the clamping block 414 are used in combination to clamp and fix the pen barrel.

[0054] S2. After the pen barrel rotates to the lower part of the protective cover 9, the moving frame 7, the welding machine 8 and the protective cover 9 move downward as a whole. The protective cover 9 covers the pen barrel. The two support rods 1311 respectively extend into the corresponding pen barrels. The second movable block 1310 finally moves upward under the extrusion of the extrusion block 12. The two support rods 1311 move upward, so that the metal sheet fits on the inner top of the pen barrel. Then use the welding machine 8 to weld the metal sheet on the pen barrel. After the welding operation is completed, remove the welding machine 8, the protective cover 9 and the two support rods 1311.

[0055] S3. When the pen barrel rotates to the left side of the upper end surface of the turntable 401, the clamping block 414 releases the clamping of the pen barrel. The pressing frame 1009 moves downward to press the first piston 417. The two second pistons 420 move downward and retract into the turntable 401. Then the push plate 1012 moves backward and pushes the pen barrel off the card seat 402, which is convenient for automatic blanking. While blanking the previous pen barrel, the welding process is carried out on the next pen barrel.

[0056] The working principle of this device is as follows: First, place the pen shaft on the card seat 402 and abut it against the second piston 420. There are four groups of card seats 402, and each group of card seats 402 has two. Place the metal sheet in the card slot 1312. When the turntable 401 rotates counterclockwise and the first movable block 405 is squeezed by the squeezing bar 2 and moves upward, the moving plate 404 and the two first toothed plates 408 move upward, the two gears 409 rotate, the upper and lower second toothed plates 410 move, and the two clamping plates 411 in each group approach each other. The second spring 413 and the clamping block 414 are used in combination to clamp and fix the two pen shafts. After the pen shafts rotate to the lower part of the protective cover 9, the moving frame 7, the welding machine 8 and the protective cover 9 move downward as a whole. The protective cover 9 covers the two pen shafts. At the same time, the fifth piston 1304 and the second connecting frame 1305 move downward, the sixth piston 1306, the second slide rail 1307, the second movable block 1310 and the two support rods 1311 move leftward. The two support rods 1311 respectively extend into the corresponding pen shafts. The second movable block 1310 is finally squeezed by the squeezing block 12 and moves upward, thereby driving the two support rods 1311 to move upward. The metal sheet finally fits tightly on the inner wall of the pen shaft. Then, use the welding machine 8 to weld the metal sheet on the pen shaft. After the welding operation is completed, the moving frame 7, the welding machine 8 and the protective cover 9 are lifted as a whole. The two support rods 1311 move downward and are withdrawn from the pen shafts. When the welded main material rotates to the lower part of the first slide rail 1008, the first movable block 405 is not squeezed by the squeezing bar 2, and the clamping block 414 releases the clamping of the pen shaft. When the moving frame 7 moves downward, it drives the third piston 1002 and the first connecting frame 1003 to move downward. The fourth piston 1007, the first slide rail 1008, the pressing frame 1009 and the pushing plate 1012 move downward. The pressing frame 1009 presses the first piston 417, and the two second pistons 420 move downward and are withdrawn. Then, the lead screw 1011 rotates, the pushing plate 1012 moves backward and pushes the pen shaft away from the card seat 402, so as to realize automatic blanking. While the previous pen shaft is being blanked, the next pen shaft can be welded. And the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0057] In summary, the automatic welding device for metal sheets and its welding method achieve the purposes of clamping and fixing, automatic fitting and positioning, isolation and protection, automatic blanking and continuous and efficient welding, and meet the usage requirements of people.

[0058] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic welding device for metal sheets, comprising a first support table (1), characterized in that: An extrusion strip (2) is fixed to the upper end surface of the first support platform (1), a first motor (3) is fixed inside the first support platform (1), the top of the first motor (3) is connected to a clamping mechanism (4), the clamping mechanism (4) comprises a turntable (401), a clamping seat (402) is fixed to the upper end surface of the turntable (401), a clamping plate (411) is slidably connected to the upper end surface of the turntable (401), the inner side of the clamping plate (411) is connected to a clamping block (414) via a second spring (413), and the clamping block (414) passes through the clamping plate (411); A bracket (5) is fixed to the upper end surface of the first support platform (1); the lower side of the inner top of the bracket (5) is connected to the movable frame (7) via an electric telescopic column (6); a welding machine (8) and a protective cover (9) are fixed to the front side of the movable frame (7); a material discharge mechanism (10) is fixed to the inner top of the bracket (5); and the material discharge mechanism (10) is connected to one side of the movable frame (7); A second support platform (11) is fixed to one side of the first support platform (1), an extrusion block (12) is fixed to one side of the upper end surface of the second support platform (11), a loading mechanism (13) is fixed to the other side of the upper end surface of the second support platform (11), the loading mechanism (13) is fixed to the inner top of the bracket (5), the loading mechanism (13) is connected to the other side of the movable frame (7), the loading mechanism (13) comprises a fifth oil cylinder (1301), and the fifth oil cylinder (1301) is fixed to the other side of the upper end surface of the second support platform (11), a sixth oil cylinder (1303) is fixed to the inner top of the bracket (5), and the bottom of the sixth oil cylinder (1303) is connected to one side of the fifth oil cylinder (1301) through a third connecting pipe (1302), a fifth piston (1304) is slidably connected in the sixth oil cylinder (1303), and the fifth piston (1304) 1304) is connected to the other side of the movable frame (7) through a second connecting frame (1305), a sixth piston (1306) is slidably connected in the fifth oil cylinder (1301), and the sixth piston (1306) passes through the other side of the fifth oil cylinder (1301) and is connected to the second slide rail (1307), a limiting column (1308) is fixed in the second slide rail (1307), and the lower side of the top of the second slide rail (1307) is connected to the second movable block (1310) through a fourth spring (1309), the second movable block (1310) is slidably connected in the second slide rail (1307), the limiting column (1308) passes through the second movable block (1310), support rods (1311) are symmetrically fixed on both sides of one end surface of the second movable block (1310), and two card grooves (1312) are provided on the upper end surface of the support rod (1311).

2. The automatic welding device for metal sheets according to claim 1, characterized in that: The turntable (401) is provided with a groove (403), and a movable plate (404) is slidably connected in the groove (403); a first movable block (405) is fixed to the bottom of the movable plate (404), and the first movable block (405) is connected to the bottom of the turntable (401) via a first spring (406); a ball bearing (407) is movably connected to the bottom of the first movable block (405).

3. The automatic welding device for metal sheets according to claim 2, characterized in that: A first tooth plate (408) is fixed on both sides of the upper end surface of the movable plate (404), and a gear (409) is meshedly connected to one side of the first tooth plate (408), the gear (409) is rotatably connected to the groove (403), and the top of the gear (409) and the bottom of the gear (409) are meshedly connected to the second tooth plate (410), the clamping plate (411) is fixed on the outer side of the second tooth plate (410), and a sliding groove (412) is provided on the upper end surface of the turntable (401), and the clamping plate (411) is slidably connected in the sliding groove (412).

4. The automatic welding device for metal sheets according to claim 3, characterized in that: A first oil cylinder (415) is fixed in the turntable (401), and the upper side of the bottom of the first oil cylinder (415) is connected to a first piston (417) via a third spring (416); the first piston (417) is slidably connected in the first oil cylinder (415), and the first piston (417) passes through the top of the first oil cylinder (415) and the upper end surface of the turntable (401); a second oil cylinder (419) is fixed in the turntable (401), the first oil cylinder (415) is connected to two second oil cylinders (419) via a first connecting pipe (418), and a second piston (420) is slidably connected in the second oil cylinder (419), and the second piston (420) passes through the top of the second oil cylinder (419) and the upper end surface of the turntable (401).

5. The automatic welding device for metal sheets according to claim 4, characterized in that: The unloading mechanism (10) comprises a third oil cylinder (1001), and the third oil cylinder (1001) is fixed to the inner top of the bracket (5), a third piston (1002) is slidably connected inside the third oil cylinder (1001), and the third piston (1002) is connected to one side of the movable frame (7) through a first connecting frame (1003), a fixed frame (1006) is fixed to the upper end surface of the first support platform (1), and a fourth oil cylinder (1005) is fixed to one side of the fixed frame (1006), the top of the fourth oil cylinder (1005) is connected to the bottom of the third oil cylinder (1001) through a second connecting pipe (1004), and a fourth piston (1007) is slidably connected inside the fourth oil cylinder (1005).

6. The automatic welding device for metal sheets according to claim 5, characterized in that: The fourth piston (1007) passes through the bottom of the fourth oil cylinder (1005) and is connected to the first slide rail (1008), and a pressing frame (1009) is fixed to one side of the first slide rail (1008), a second motor (1010) is fixed to the front side of the first slide rail (1008), and the output end of the second motor (1010) is connected to the screw rod (1011), and the outer side of the screw rod (1011) is threadedly connected to a push plate (1012), and the push plate (1012) is slidably connected in the first slide rail (1008).

7. An automatic welding method for metal sheets, applied to the automatic welding device for metal sheets as claimed in claim 6, characterized in that: The following steps are involved: S1. Place the pen holder on the holder (402) and place it against the second piston (420), place the metal sheet into the slot (1312), rotate the turntable (401) counterclockwise, the first movable block (405) is pressed by the pressing strip (2) and moves upward, the movable plate (404) and the two first tooth plates (408) move upward, the gear (409) rotates to drive the two second tooth plates (410) to move, the two clamping plates (411) move closer to each other, and the second spring (413) and the clamping block (414) are used to clamp and fix the pen holder; S2, after the pen holder is moved to the bottom of the protective cover (9), the movable frame (7), the welding machine (8) and the protective cover (9) are moved downward as a whole, the protective cover (9) covers the pen holder, the two support rods (1311) are respectively extended into the corresponding pen holders, the second movable block (1310) is finally moved upward under the extrusion of the extrusion block (12), the two support rods (1311) are moved upward, so that the metal sheet is attached to the inner top of the pen holder, and then the welding machine (8) is used to weld the metal sheet to the pen holder. After the welding operation is completed, the welding machine (8), the protective cover (9) and the two support rods (1311) are removed; S3. When the pen holder rotates to the left side of the upper end surface of the turntable (401), the clamping block (414) releases the clamping of the pen holder, the pressing frame (1009) moves downward to press the first piston (417), the two second pistons (420) move downward and retract into the turntable (401), and then the push plate (1012) moves backward and pushes the pen holder off the holder (402), so as to facilitate automatic unloading. While unloading the previous pen holder, the next pen holder can be welded.

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