Mobile phone frame front and back steel sheet welding equipment

Abstract

The application relates to the technical field of mobile phone middle frame production, in particular to a mobile phone middle frame front and back steel sheet welding equipment, which comprises a machine box, a welding platform is arranged in the machine box, a plurality of groups of welding sheet feeding flying machines are arranged on one side of the welding platform, a plurality of groups of welding sheet feeding robots are arranged on the welding platform, and electric sliding rails are fixedly connected to the welding platform; through the full-chain automatic design of a middle frame feeding belt line, a middle frame feeding robot, welding sheet feeding flying machines, welding sheet feeding robots and a laser welding module, the complicated process of manually taking and placing steel sheets and positioning middle frames is replaced, meanwhile, two groups of middle frame feeding platforms can realize alternate operation, when one group is used for front welding, the other group can simultaneously complete middle frame turning and back welding, the idle time of the equipment is greatly reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of mobile phone mid-frame production technology, specifically to a welding equipment for steel sheets on the front and back of a mobile phone mid-frame. Background Technology

[0002] In the mobile phone manufacturing industry, the mid-frame is a key structural component. Steel sheets are usually welded to specific locations on the front and back of the mid-frame to enhance local structural strength or achieve specific assembly functions.

[0003] Currently, the welding process of steel sheets on the front and back of mobile phone frames mostly relies on manual labor in conjunction with welding equipment. The steel sheets are supplied in the form of strips. After the workers remove the steel sheets from the strips, they place the mobile phone frame in the work area, then place the steel sheets in the corresponding welding positions on the frame, and finally complete the welding using welding equipment. Manual handling is not only cumbersome and time-consuming, but it is also difficult to ensure the positioning accuracy of the steel sheets and the frame, which can easily lead to welding deviations and affect product quality. At the same time, manual operation is inefficient and cannot meet the needs of mass production. Therefore, a welding device for steel sheets on the front and back of mobile phone frames is proposed to facilitate the welding of steel sheets, improve welding efficiency, and enhance welding convenience. Summary of the Invention

[0004] To address the problems in the prior art, this invention provides a welding device for steel sheets on the front and back of a mobile phone frame, which facilitates the welding of steel sheets and improves welding efficiency and convenience.

[0005] The technical solution adopted by this invention to solve its technical problem is a welding equipment for steel sheets on the front and back of a mobile phone mid-frame, including a chassis, a welding platform inside the chassis, several sets of welding sheet feeding feeders on one side of the welding platform, several sets of welding sheet feeding robots on the welding platform, an electric slide rail fixedly connected to the welding platform, a laser welding module slidably connected on the electric slide rail, a mid-frame feeding conveyor belt on the outside of the chassis, a mid-frame feeding robot on the side of the welding platform near the laser welding module, and two sets of mid-frame feeding platforms on the welding platform.

[0006] Specifically, the middle frame feeding platform includes a horizontally arranged linear motor, a slide table slidably connected to the linear motor, a base plate connected to the slide table via a support, a positioning template detachably connected to the base plate, a slot corresponding to the middle frame on the positioning template, a negative pressure adsorption component at the bottom of the slot, and the negative pressure adsorption component connected to a negative pressure pump via a negative pressure pipeline.

[0007] Specifically, a double-headed cylinder is connected to the support, and vertically arranged telescopic cylinders are fixedly connected to both ends of the double-headed cylinder. A positioning plate is connected to the upper end of the telescopic cylinder, and several sets of extrusion plates are detachably connected to the upper surface of the positioning plate. A positioning seat is connected to the lower surface of the end of the extrusion plate. The double-headed cylinder is connected to the negative pressure pipeline through a connecting pipe and a first pressure relief valve. The telescopic cylinder is connected to the negative pressure pipeline through a connecting pipe and a second pressure relief valve. The opening pressure of the second pressure relief valve is greater than that of the first pressure relief valve.

[0008] Specifically, the negative pressure adsorption component includes several sets of first through holes on the positioning template, several sets of second through holes communicating with the first through holes on the upper surface of the base plate, and a connecting connector communicating with several sets of second through holes on one side of the base plate. The connecting connector is connected to the negative pressure pipeline through a connecting pipe.

[0009] Both the positioning template and the base plate are provided with through holes. A vertically arranged pressing rod is slidably connected in the opening. A horizontally arranged limiting plate is fixedly connected to the lower end of the pressing rod. A return spring is fixedly connected between the upper surface of the limiting plate and the lower surface of the base plate.

[0010] Specifically, the linear motor has fixed plates on both sides that are connected to the welding platform. A horizontally arranged cleaning plate is fixedly connected between the two sets of fixed plates. Air nozzles are provided on both sides of the lower surface of the cleaning plate. Several sets of suction nozzles are provided on the lower surface of the middle part of the cleaning plate. The cleaning plate is provided with air nozzles and suction nozzles that are respectively connected to the air nozzles and suction nozzles.

[0011] Specifically, both sets of fixed plates are provided with extrusion connecting components, and the two sets of extrusion connecting components are respectively connected to the air blowing connector and the air extraction connector;

[0012] Both sets of the extrusion connection components include a pressing valve located on the side of the fixed plate away from the linear motor. The valve stem of the pressing valve passes through the fixed plate and is connected to the bracket. A vertically arranged auxiliary roller is rotatably connected inside the bracket. Wedge-shaped extrusion surfaces are provided at the four corner positions of the support. One set of pressing valves is connected to the air supply structure and the air blowing connector through a pipeline. The other set of pressing valves is connected to the negative pressure pipeline and the air extraction connector through a connecting pipe.

[0013] Specifically, the fixed plate 28 is provided with several sets of positioning holes, and the bracket is provided with a horizontally arranged positioning rod on the side away from the auxiliary roller. One end of the positioning rod passes through the positioning hole and is slidably connected to the positioning hole. A compression spring is fixedly connected between the end of the positioning rod away from the bracket and the fixed plate.

[0014] Specifically, the air supply structure includes elastic air storage pads horizontally arranged on both sides of the linear motor. The end of the elastic air storage pad away from the laser welding module is connected to a one-way air inlet valve and a one-way air outlet valve. The one-way air outlet valve is connected to a set of push valves through a pipeline. Both ends of the slide are connected to support plates, and the support plates are rotatably connected to the compression rollers that are squeezed by the elastic air storage pads.

[0015] Specifically, the outer side of the chassis is equipped with a control platform for controlling the sheet feeding feeder, sheet feeding robot, electric slide rail, laser welding module, middle frame feeding robot, and linear motor.

[0016] The beneficial effects of this invention are:

[0017] 1. The mobile phone mid-frame front and back steel sheet welding equipment of the present invention, through the full-chain automation design of mid-frame feeding conveyor belt, mid-frame feeding robot, welding sheet feeding feeder, welding sheet feeding robot and laser welding module, replaces the cumbersome process of traditional manual steel sheet picking and placing and positioning of mid-frame. At the same time, the two sets of mid-frame feeding platforms can achieve alternating operation. When one set is performing front welding, the other set can simultaneously complete the mid-frame flipping and back welding, greatly reducing equipment idle time and significantly improving production efficiency.

[0018] 2. The mobile phone mid-frame front and back steel sheet welding equipment of the present invention allows the mid-frame to be placed in the slot of the positioning template without manual triggering. The negative pressure adsorption can be started by the mid-frame itself sealing the first and second through holes. Subsequently, as the negative pressure increases, the first and second pressure relief valves are used to first open the lateral positioning of the double-headed cylinder, and then the telescopic cylinder is opened to complete the longitudinal fixation. The whole process is seamlessly connected, saving manual operation steps and waiting time, speeding up the pace of single process, and adapting to the continuous operation requirements of high-speed production lines.

[0019] 3. In the mobile phone mid-frame steel sheet welding equipment described in this invention, when the mid-frame moves to the cleaning area, the wedge-shaped extrusion surface of the slide triggers the pressing valve, which connects the negative pressure pipeline to the atmosphere. After the negative pressure disappears, the first pressure relief valve and the second pressure relief valve close, and the double-headed cylinder and the telescopic cylinder automatically reset, releasing the lateral and longitudinal fixation of the mid-frame. At the same time, the pressing rod lifts the mid-frame under the action of the reset spring, making it easy for the mid-frame loading robot to smoothly grasp and transfer the mid-frame.

[0020] 4. The mobile phone mid-frame steel sheet welding equipment of the present invention, after welding, moves by a slide table, and then squeezes the auxiliary roller by a wedge extrusion surface, opens the pressing valve, and automatically starts the air blowing nozzle and air suction nozzle. No manual operation or additional control commands are required, ensuring that metal debris, dust and other impurities on the surface of the mid-frame and in the slot can be cleaned in time after each welding, avoiding the impurities remaining and affecting the welding quality of the next batch or scratching the mid-frame. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is an isometric view of the present invention;

[0023] Figure 2 This is a top view of the welding platform structure of the present invention;

[0024] Figure 3 This is an isometric view of the linear motor of the present invention;

[0025] Figure 4 for Figure 3 Enlarged view of region A;

[0026] Figure 5 This is a side view of the linear motor structure of the present invention;

[0027] Figure 6 for Figure 5 Enlarged view of region B;

[0028] Figure 7 This is a schematic diagram of the fixing plate connection structure of the present invention;

[0029] Figure 8 for Figure 7 Enlarged view of region C;

[0030] Figure 9 for Figure 7 Enlarged view of region D;

[0031] In the diagram: 1. Chassis; 2. Welding platform; 3. Welding sheet feeding feeder; 4. Welding sheet feeding robot; 5. Electric slide rail; 6. Laser welding module; 7. Middle frame feeding conveyor belt; 8. Middle frame feeding robot; 9. Middle frame feeding platform; 10. Linear motor; 11. Slide table; 12. Support; 13. Base plate; 14. Positioning template; 15. Slot; 16. Double-headed cylinder; 17. Telescopic cylinder; 18. Positioning plate; 19. Extrusion plate; 20. Positioning seat; 21. First through hole; 22. Second through hole; 23. 24. Connecting connector; 25. Opening; 26. Pressing rod; 27. Limiting plate; 28. Return spring; 29. ​​Fixing plate; 30. Cleaning plate; 31. Air nozzle; 32. Air suction nozzle; 33. Air blowing connector; 34. Air suction connector; 35. Pressing valve; 36. Bracket; 37. Auxiliary roller; 38. Wedge-shaped extrusion surface; 39. Positioning hole; 40. Positioning rod; 41. Extrusion spring; 42. Elastic air storage pad; 43. One-way air outlet valve; 44. Support plate; 45. Extrusion roller; 46. Control platform; 47. One-way air inlet valve. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0033] To facilitate welding of steel sheets, improve welding efficiency and ease of welding, as one embodiment of the present invention, such as... Figure 1 , Figure 2 As shown, the present invention discloses a welding equipment for the front and back steel sheets of a mobile phone frame, comprising a chassis 1, a welding platform 2 inside the chassis 1, several sets of welding sheet feeding feeders 3 on one side of the welding platform 2, several sets of welding sheet feeding robots 4 on the welding platform 2, an electric slide rail 5 fixedly connected to the welding platform 2, a laser welding module 6 slidably connected to the electric slide rail 5, a frame feeding conveyor belt 7 on the outside of the chassis 1, a frame feeding robot 8 on the side of the welding platform 2 near the laser welding module 6, and two sets of frame feeding platforms 9 on the welding platform 2.

[0034] During use, the mobile phone frame to be welded is transported to the designated position via the feeding conveyor belt. The frame feeding robot 8 picks up the frame from the frame feeding conveyor belt 7 and places it on one of the frame feeding platforms 9 on the welding platform 2. The frame feeding platform 9 starts and transports the placed frame to the electric slide rail 5 directly below, completing the positioning of the frame and aligning it with the position to be welded.

[0035] Once the middle frame is conveyed to the electric slide rail 5, the welding sheet feeding feeder 3 provides the welding sheet. The welding sheet feeding robot 4 on the welding platform 2 grabs the required welding sheet from the welding sheet feeding feeder 3 and moves it to the middle frame below the electric slide rail 5, placing the welding sheet at the welding position on the middle frame.

[0036] After the welding piece is placed, the electric slide rail 5 drives the laser welding module 6 to move along the slide rail. When the laser welding module 6 moves to the position of the welding piece above the middle frame, it is adjusted to a suitable welding height and angle, and then the laser welding function is activated to weld and fix the welding piece to the middle frame. The two sets of middle frame loading platforms 9 can work alternately. After the front welding of the middle frame is completed, the middle frame with the completed front welding can be transported to another set of middle frame loading platforms 9 by the middle frame loading robot 8, so that the reverse side is facing up. One set of middle frame loading platforms 9 receives the new middle frame and prepares for front welding, while the other set of middle frame loading platforms 9 performs reverse welding on the flipped middle frame, which facilitates front and reverse welding, reduces equipment idle time, significantly improves production efficiency, and meets the needs of mass production.

[0037] It should be noted that the welding sheet in the welding sheet feeding feeder 3 of the present invention is a thin sheet of metal steel; the electric slide rail 5 should be a three-axis or four-axis track.

[0038] To improve production efficiency, for example, such as Figure 2, Figure 3 , Figure 4 , Figure 8 As shown, the present invention also includes a horizontally arranged linear motor 10 on the middle frame loading platform 9. A slide table 11 is slidably connected to the linear motor 10. A base plate 13 is connected to the slide table 11 via a support 12. A positioning template 14 is detachably connected to the base plate 13. The positioning template 14 is provided with a slot 15 corresponding to the middle frame. A negative pressure adsorption component is provided at the bottom of the slot 15. The negative pressure adsorption component is connected to a negative pressure pump through a negative pressure pipeline.

[0039] During use, according to the specifications and dimensions of the frame to be welded, select the corresponding size positioning template 14, and match the slot 15 with the outline of the frame. The positioning template 14 is detachably connected to the top of the base plate 13. After the frame loading robot 8 picks up the frame, it aligns the frame with the slot 15 on the positioning template 14 and presses it into the bottom of the slot 15. When the frame is fully inserted into the slot 15, the pressing and adsorption component is opened, and the negative pressure suction is used to firmly adsorb the frame into the bottom of the slot 15 to prevent the frame from shifting. The linear motor 10 is started to drive the slide table 11 to move. The slide table 11 drives the positioning template 14 and the adsorbed and fixed frame to move synchronously through the support 12 and the base plate 13. Finally, the frame is transported to one side of the electric slide rail 5, located directly below the laser welding module 6, waiting for welding.

[0040] Once the middle frame enters the slot 15, the adsorption process automatically starts, eliminating the need for manual triggering. This saves on additional steps and waiting time, allowing for seamless integration of the middle frame placement and fixing process. This accelerates the pace of a single process, improves overall production efficiency, and avoids the subjectivity of manual operation, such as forgetting to start or improper timing of start-up, thus reducing product quality issues caused by human error.

[0041] To further ensure the stability of the mid-frame, for example, such as Figure 3 , Figure 4 , Figure 5 As shown, the present invention also includes a double-headed cylinder 16 connected to the support 12, with vertically arranged telescopic cylinders 17 fixedly connected to both ends of the double-headed cylinder 16. A positioning plate 18 is connected to the upper end of the telescopic cylinder 17, and several sets of extrusion plates 19 are detachably connected to the upper surface of the positioning plate 18. A positioning seat 20 is connected to the lower surface of the end of the extrusion plate 19. The double-headed cylinder 16 is connected to the negative pressure pipeline through a connecting pipe and a first pressure relief valve. The telescopic cylinder 17 is connected to the negative pressure pipeline through a connecting pipe and a second pressure relief valve. The opening pressure of the second pressure relief valve is greater than that of the first pressure relief valve.

[0042] When in use, when the middle frame is not placed in the slot 15 of the positioning template 14, the negative pressure adsorption component is connected to the atmosphere. The suction force generated by the negative pressure pump through the negative pressure pipeline cannot form an effective negative pressure in the pipeline. At this time, the double-headed cylinder 16 and the telescopic cylinder 17 are both in the initial standby state. The output end of the double-headed cylinder 16 extends, and the output ends of the two sets of telescopic cylinders 17 move upward. The positioning plate 18, the extrusion plate 19 and the positioning seat 20 move away from the top of the slot 15.

[0043] When the middle frame loading robot 8 presses the middle frame into the bottom of the slot 15, the middle frame seals the negative pressure adsorption component at the bottom of the slot 15, so that it is no longer connected to the atmosphere; at this time, the negative pressure pump draws air through the negative pressure pipeline to form a negative pressure in the pipeline, the negative pressure adsorption component is activated, and the middle frame is firmly adsorbed in the slot 15 by the suction force, thus completing the initial fixation of the middle frame.

[0044] As the negative pressure pump continues to draw air, the pressure in the negative pressure pipeline gradually decreases and the negative pressure value increases. When the pressure reaches the opening pressure of the first pressure relief valve, the first pressure relief valve opens, and the negative pressure pipeline draws air into the double-headed cylinder 16 through the connecting pipe, causing the output end of the double-headed cylinder 16 to retract. The retraction of the double-headed cylinder 16 drives the two sets of telescopic cylinders 17 fixed at both ends and the connected positioning plate 18 to move closer to each other synchronously until they move to the preset positions on both sides of the middle frame, completing the lateral positioning and alignment of the middle frame.

[0045] The negative pressure pump continues to draw air, further reducing the pressure in the negative pressure pipeline. When the pressure reaches the opening pressure of the second pressure relief valve (because the opening pressure of the second pressure relief valve is greater than that of the first pressure relief valve), and the double-headed cylinder 16 has completed its retraction action, the second pressure relief valve opens. The negative pressure pipeline draws air into the telescopic cylinder 17 through the connecting pipe, causing the output end of the telescopic cylinder 17 to move downward. The downward movement of the telescopic cylinder 17 drives the positioning plate 18, the extrusion plate 19, and the positioning seat 20 at the end of the extrusion plate 19 to move downward simultaneously until the lower end face of the positioning seat 20 presses against the upper surface of the middle frame, forming a longitudinal compression fixation of the middle frame. When the middle frame is placed at the bottom of the slot 15, the negative pressure adsorption assembly, the double-headed cylinder 16, and the telescopic cylinder 17 work automatically and complete the fixation in sequence without additional control intervention. This also prevents damage to the middle frame or equipment caused by malfunction of components when the middle frame is not in place, and it does not require manual triggering, making the fixing process smoother and improving overall efficiency.

[0046] For example, such as Figure 3 , Figure 4 As shown, the present invention also includes the following: the negative pressure adsorption component includes a plurality of first through holes 21 disposed on the positioning template 14; the upper surface of the base plate 13 is provided with a plurality of second through holes 22 communicating with the first through holes 21; one side of the base plate 13 is provided with a connecting joint 23 communicating with the plurality of second through holes 22; the connecting joint 23 is connected to the negative pressure pipeline through a connecting pipe.

[0047] Both the positioning template 14 and the base plate 13 are provided with through holes 24. A vertically arranged pressing rod 25 is slidably connected in the opening 24. A horizontally arranged limiting plate 26 is fixedly connected to the lower end of the pressing rod 25. A return spring 27 is fixedly connected between the upper surface of the limiting plate 26 and the lower surface of the base plate 13.

[0048] When in use, when the slot 15 of the positioning template 14 is in an empty state, the upper end of the pressing rod 25 protrudes slightly from the bottom of the slot 15 of the positioning template 14 under the elastic force of the return spring 27, and the first through hole 21 and the second through hole 22 are connected to the atmosphere.

[0049] After the mid-frame loading robot 8 picks up the mobile phone mid-frame, it aligns it with the slot 15 of the positioning template 14 and presses it vertically downwards. The lower surface of the mid-frame first contacts the top of the pressing rod 25. As the robot continues to apply pressure, the mid-frame pushes the pressing rod 25 to slide downwards along the opening 24. The limiting plate 26 at the lower end of the pressing rod 25 moves down simultaneously, compressing the reset spring 27 until the mid-frame is completely inserted into the slot 15 and fits against the bottom of the slot 15. When the mid-frame is completely at the bottom of the slot 15, the lower surface of the mid-frame completely covers the first through hole 21, forming a closed space. At this time, the negative pressure pump draws air from the closed space through the pipeline in sequence through the connecting joint 23, the second through hole 22, and the first through hole 21, so that a negative pressure environment is formed between the mid-frame and the bottom of the slot 15. The atmospheric pressure is used to firmly adsorb the mid-frame into the slot 15, completing the initial fixation.

[0050] After the middle frame closes the first through hole 21, the pressure in the negative pressure pipeline gradually decreases. When the pressure reaches the opening pressure of the first pressure relief valve, the negative pressure pipeline draws air into the double-headed cylinder 16, causing it to contract. This drives the telescopic cylinders 17 on both sides and the positioning plate 18 to move closer to the middle frame, achieving lateral positioning of the middle frame. When the pressure continues to decrease to the opening pressure of the second pressure relief valve, the telescopic cylinder 17 supplies air and moves downward. The middle frame is pressed from above by the extrusion plate 19 and the positioning seat 20, completing the longitudinal fixation. The process of middle frame placement, negative pressure adsorption, and cylinder fixation does not require manual intervention and is compatible with the rhythm of high-speed production lines.

[0051] To facilitate cleaning of the welded mid-frame, for example, such as Figure 3 , Figure 5 , Figure 6 As shown, the present invention also includes a fixing plate 28 on both sides of the linear motor 10 that is connected to the welding platform 2, a horizontally arranged cleaning plate 29 fixedly connected between the two sets of fixing plates 28, an air blowing nozzle 30 on both sides of the lower surface of the cleaning plate 29, a plurality of air extraction nozzles 31 on the lower surface of the middle part of the cleaning plate 29, and an air blowing connector 32 and an air extraction connector 33 respectively connected to the air blowing nozzles 30 and the air extraction nozzles 31 on the cleaning plate 29.

[0052] During use, after the steel sheets on both sides of the middle frame are welded below the laser welding module 6, the linear motor 10 drives the slide table 11 to move the middle frame loading platform 9 along the track to reset and gradually move away from the welding area, approaching the initial loading position. When the slide table 11 moves the positioning template 14 and the middle frame to the initial loading area, it continues to move away from the laser welding module 6. When it reaches the preset position directly below the cleaning plate 29, the air nozzles 30 on both sides of the lower surface of the cleaning plate 29 spray air onto the surface of the middle frame to blow away the metal debris, dust particles and residual impurities generated during the welding process, preventing impurities from adhering to the surface. The impurities are placed on the surface of the middle frame or in the gap of the slot 15. At the same time, a strong suction force is generated by several sets of suction nozzles 31 to promptly absorb and collect the impurities blown up by the air nozzles 30, preventing the impurities from falling back onto the middle frame or contaminating other areas of the equipment. As the middle frame loading platform 9 passes the cleaning plate 29, the middle frame loading robot 8 will grab and transfer the cleaned middle frame. After the middle frame is transferred, the positioning template 14 is driven by the slide table 11 to move toward the laser welding module 6 and move to the initial loading position, waiting for the middle frame loading robot 8 to place the next set of middle frames to be welded into the slot 15 of the positioning template 14.

[0053] For example, such as Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the present invention also includes that both sets of fixed plates 28 are provided with extrusion connecting components, and the two sets of extrusion connecting components are respectively connected to the air blowing connector 32 and the air extraction connector 33.

[0054] Both sets of the extrusion connection components include a pressing valve 34 disposed on the side of the fixed plate 28 away from the linear motor 10. The valve stem of the pressing valve 34 passes through the fixed plate 28 and is connected to the bracket 35. The bracket 35 is rotatably connected to a vertically disposed auxiliary roller 36. The four corner positions of the support 12 are provided with wedge-shaped extrusion surfaces 37. One set of pressing valves 34 is connected to the air supply structure and the air blowing connector 32 through a pipeline. The other set of pressing valves 34 is connected to the negative pressure pipeline and the air extraction connector 33 through a connecting pipe.

[0055] When in use, after the middle frame is welded, when the slide table 11 moves the positioning template 14 and the middle frame to the initial feeding area, it continues to move away from the laser welding module 6 and gradually moves to the area directly below the cleaning plate 29. At this time, the wedge-shaped extrusion surfaces 37 at the four corners of the slide table 11 gradually approach the auxiliary rollers 36 on the fixed plate 28. The wedge-shaped extrusion surfaces 37 extrude the auxiliary rollers 36, pushing the bracket 35 to move away from the linear motor 10, thereby driving the valve stem of the pressing valve 34 to move synchronously, so that the pressing valve 34 is opened.

[0056] When a set of press valves 34 connected to the air blowing connector 32 is opened, the gas in the air supply structure is delivered to the air blowing nozzle 30 through the pipeline via the press valves 34 and the air blowing connector 32. The air blowing nozzle 30 sprays airflow onto the surface of the middle frame, blowing up metal shavings, dust and other impurities generated during welding. Similarly, when another set of press valves 34 connected to the air extraction connector 33 is opened simultaneously, the negative pressure of the negative pressure pipeline is transmitted to the air extraction nozzle 31 through the connecting pipe via the press valves 34 and the air extraction connector 33. The air extraction nozzle 31 generates suction to promptly extract and collect the impurities blown up by the air blowing nozzle 30, preventing the impurities from scattering.

[0057] When the negative pressure pipeline of the negative pressure pump is connected to a set of pressing valves 34, the negative pressure pipeline is connected to the atmosphere, and the pressure in the pipeline rises back to atmospheric pressure. The first pressure relief valve and the second pressure relief valve are both closed. The double-headed cylinder 16 and the telescopic cylinder 17, which have lost the negative pressure drive, return to their initial state. The output end of the double-headed cylinder 16 extends, driving the telescopic cylinders 17 on both sides and the positioning plate 18 to move away from each other, releasing the lateral positioning of the middle frame. The output end of the telescopic cylinder 17 moves upward, driving the pressing plate 19 and the positioning seat 20 to move upward, releasing the longitudinal pressing and fixing of the middle frame. At the same time, when the negative pressure adsorption force disappears and the cylinder fixing effect is released, the reset spring 27 elastically resets, pushing the limit plate 26 and the pressing rod 25 to move upward. The upper end of the pressing rod 25 lifts the middle frame, causing the middle frame to separate from the slot 15 of the positioning template 14. At the same time, the lifting height is consistent, which facilitates the robot to accurately position and grasp.

[0058] As the slide table 11 moves the positioning template 14 and the middle frame to the end position of the linear motor 10, the middle frame loading robot 8 can directly grab the lifted middle frame and transfer it to the next process. After the middle frame is removed and transferred, the slide table 11 moves the positioning template 14 and the middle frame toward the laser welding module 6 and moves to the initial loading position, waiting for the middle frame loading robot 8 to place the next set of middle frames to be welded into the slot 15 of the positioning template 14.

[0059] For example, such as Figure 7 , Figure 9 As shown, the present invention also includes a plurality of positioning holes 38 on the fixed plate 28, and a horizontally arranged positioning rod 39 on the side of the bracket 35 away from the auxiliary roller 36. One end of the positioning rod 39 passes through the positioning hole 38 and is slidably connected to the positioning hole 38. A compression spring 40 is fixedly connected between the end of the positioning rod 39 away from the bracket 35 and the fixed plate 28.

[0060] In use, when the slide table 11 moves the wedge-shaped extrusion surface 37 away from the auxiliary roller 36, the extrusion spring 40 resets and pushes the positioning rod 39 to slide horizontally along the positioning hole 38 of the fixed plate 28, thereby driving the bracket 35 and the auxiliary roller 36 to reset towards the linear motor 10. The sliding cooperation between the positioning rod 39 and the positioning hole 38 forms a guiding constraint, ensuring that the bracket 35 and the auxiliary roller 36 move smoothly in the horizontal direction, avoiding the valve stem of the pressing valve 34 from tilting due to offset during the reset process, ensuring that the pressing valve 34 is accurately closed, and closing the air nozzle 30 and the air extraction nozzle 31.

[0061] To facilitate air supply to the air nozzle 30, for example, such as Figure 3 , Figure 5 , Figure 7 As shown, the present invention also includes an elastic air storage pad 41 horizontally arranged on both sides of the linear motor 10. The end of the elastic air storage pad 41 away from the laser welding module 6 is connected to a one-way air inlet valve 46 and a one-way air outlet valve 42. The one-way air outlet valve 42 is connected to a set of press valves 34 through a pipeline. Both ends of the slide table 11 are connected to support plates 43. The support plates 43 are rotatably connected to the pressing rollers 44 that are pressed against the elastic air storage pad 41.

[0062] During use, when the slide table 11 moves the welded middle frame downwards towards the cleaning plate 29, the support plates 43 at both ends of the slide table 11 move synchronously with the slide table 11. The extrusion rollers 44 on the support plates 43 gradually contact and extrude pressure into the elastic air storage pad 41. After being extruded, the volume of the elastic air storage pad 41 decreases and the internal air pressure increases. The one-way air outlet valve 42 automatically opens, and the compressed air in the air storage pad is transported through the one-way air outlet valve 42 and pipeline to the press valve 34 connected to the air blowing connector 32. The compressed air enters the air blowing nozzle 30 through the press valve 34 and the air blowing connector 32, driving the air blowing nozzle 30 to spray airflow onto the surface of the middle frame and blow away welding impurities.

[0063] When the slide table 11 moves in the opposite direction, it drives the extrusion roller 44 to move synchronously. The elastic air storage pad 41 can automatically rebound and draw air through the one-way air inlet valve 46 to replenish the elastic air storage pad 41 and prepare for the next air supply.

[0064] For example, such as Figure 1 As shown, the present invention also includes a control platform 45 provided on the outside of the chassis 1 for controlling the welding sheet feeding feeder 3, the welding sheet feeding robot 4, the electric slide rail 5, the laser welding module 6, the middle frame feeding robot 8, and the linear motor 10.

[0065] When in use, the specifications of the middle frame and the parameters of the welding pieces are input through the control platform 45. The operating parameters of the welding piece feeding feeder 3, the welding piece feeding robot 4, the electric slide rail 5, the laser welding module 6, the middle frame feeding robot 8 and the linear motor 10 are preset, reducing manual intervention. The parameter settings are intuitive and adaptable to the production of middle frames of different specifications.

[0066] When using this invention, a matching positioning template 14 is selected according to the specifications and dimensions of the mobile phone frame to be welded, and it is detachably connected to the base plate 13.

[0067] The mobile phone mid-frame to be welded is placed on the mid-frame feeding conveyor belt 7. The conveyor belt transports the mid-frame to the preset picking position. The mid-frame feeding robot 8 starts, grabs the mid-frame from the conveyor belt, and moves it above the positioning template 14 of one of the mid-frame feeding platforms 9. The mid-frame is aligned with the slot 15 and pressed vertically downwards. The lower surface of the mid-frame first contacts the top of the pressing rod 25. As the robot continues to apply pressure, the mid-frame pushes the pressing rod 25 to slide downwards along the opening 24. The limiting plate 26 at the lower end of the pressing rod 25 moves in tandem. The middle frame moves down, compressing the return spring 27 until it is fully inserted into the slot 15 and fits against the bottom of the slot 15. When the middle frame is completely at the bottom of the slot 15, the lower surface of the middle frame completely covers the first through hole 21, forming a closed space. At this time, the negative pressure pump draws air from the closed space through the pipeline in sequence through the connecting joint 23, the second through hole 22, and the first through hole 21, so that a negative pressure environment is formed between the middle frame and the bottom of the slot 15. The atmospheric pressure is used to firmly attach the middle frame to the slot 15, completing the initial fixation.

[0068] After the middle frame closes the first through hole 21, the pressure in the negative pressure pipeline gradually decreases. When the pressure reaches the opening pressure of the first pressure relief valve, the first pressure relief valve opens, and the negative pressure pipeline draws air into the double-headed cylinder 16 through the connecting pipe, causing the output end of the double-headed cylinder 16 to retract. The retraction of the double-headed cylinder 16 drives the two sets of telescopic cylinders 17 fixed at both ends and the connected positioning plate 18 to move closer to each other synchronously until they move to the preset positions on both sides of the middle frame, completing the lateral positioning and alignment of the middle frame.

[0069] The negative pressure pump continues to draw air, further reducing the pressure in the negative pressure pipeline. When the pressure reaches the opening pressure of the second pressure relief valve, since the opening pressure of the second pressure relief valve is greater than that of the first pressure relief valve, the second pressure relief valve opens when the double-headed cylinder 16 has completed its retraction action. The negative pressure pipeline draws air into the telescopic cylinder 17 through the connecting pipe, causing the output end of the telescopic cylinder 17 to move downward. The downward movement of the telescopic cylinder 17 drives the positioning plate 18, the extrusion plate 19, and the positioning seat 20 at the end of the extrusion plate 19 to move downward synchronously until the lower end face of the positioning seat 20 presses against the upper surface of the middle frame, forming a longitudinal extrusion fixation on the middle frame.

[0070] The linear motor 10 is started to drive the slide table 11 to move. The slide table 11 drives the positioning template 14 and the adsorbed and fixed middle frame to move synchronously through the support 12 and the base plate 13. Finally, the middle frame is transported to one side of the electric slide rail 5, located directly below the laser welding module 6, waiting for welding. After the middle frame is transported to the bottom of the electric slide rail 5, the welding sheet feeding feeder 3 provides the welding sheet. The welding sheet feeding robot 4 on the welding platform 2 grabs the required welding sheet from the welding sheet feeding feeder 3 and moves it to the middle frame below the electric slide rail 5. The welding sheet is placed in the welding position of the middle frame. After the welding sheet is placed, the electric slide rail 5 drives the laser welding module 6 to move along the slide rail. When the laser welding module 6 moves to the welding sheet position above the middle frame, it is adjusted to a suitable welding height and angle. Then the laser welding function is started to weld and fix the welding sheet to the middle frame.

[0071] After the middle frame is welded, the linear motor 10 drives the slide table 11 to move the middle frame loading platform 9 along the track to reset and move away from the welding area and closer to the initial loading position. When the slide table 11 moves the positioning template 14 and the middle frame to the initial loading area, it continues to move away from the laser welding module 6 and gradually moves to the side directly below the cleaning plate 29. At this time, the wedge-shaped extrusion surfaces 37 at the four corners of the slide table 11 gradually approach the auxiliary rollers 36 on the fixed plate 28. The wedge-shaped extrusion surfaces 37 extrude the auxiliary rollers 36 and push the bracket 35 to move away from the linear motor 10, thereby driving the valve stem of the pressing valve 34 to move synchronously and opening the pressing valve 34.

[0072] After a set of press valves 34 connected to the air blowing connector 32 is opened, the support plates 43 at both ends of the slide table 11 move synchronously with the slide table 11. The squeeze rollers 44 on the support plates 43 gradually contact and squeeze the elastic air storage pad 41. The compressed air in the air storage pad is transported to the press valves 34 connected to the air blowing connector 32 through the one-way air outlet valve 42 and the pipeline. The compressed air enters the air blowing nozzle 30 through the press valve 34 and the air blowing connector 32, driving the air blowing nozzle 30 to spray airflow onto the surface of the middle frame, blowing up metal chips, dust and other impurities generated during welding. Similarly, after another set of press valves 34 connected to the air extraction connector 33 is opened synchronously, the negative pressure of the negative pressure pipeline is transmitted to the air extraction nozzle 31 through the connecting pipe, the press valve 34 and the air extraction connector 33. The air extraction nozzle 31 generates suction to promptly extract and collect the impurities blown up by the air blowing nozzle 30, preventing the impurities from scattering.

[0073] When the negative pressure pipeline of the negative pressure pump is connected to a set of pressing valves 34, the negative pressure pipeline is connected to the atmosphere, and the pressure in the pipeline rises back to atmospheric pressure. The first pressure relief valve and the second pressure relief valve are both closed. The double-headed cylinder 16 and the telescopic cylinder 17, which have lost the negative pressure drive, return to their initial state. The output end of the double-headed cylinder 16 extends, driving the telescopic cylinders 17 on both sides and the positioning plate 18 to move away from each other, releasing the lateral positioning of the middle frame. The output end of the telescopic cylinder 17 moves upward, driving the pressing plate 19 and the positioning seat 20 to move upward, releasing the longitudinal pressing and fixing of the middle frame. At the same time, when the negative pressure adsorption force disappears and the cylinder fixing effect is released, the reset spring 27 elastically resets, pushing the limit plate 26 and the pressing rod 25 to move upward. The upper end of the pressing rod 25 lifts the middle frame, causing the middle frame to separate from the slot 15 of the positioning template 14. At the same time, the lifting height is consistent, which facilitates the robot's precise positioning and grasping.

[0074] As the slide table 11 moves the positioning template 14 and the middle frame to the end position of the linear motor 10, the middle frame loading robot 8 can directly grab the lifted middle frame and transfer it to the next process. After the middle frame is removed and transferred, the slide table 11 moves the positioning template 14 and the middle frame toward the laser welding module 6 and moves to the initial loading position, waiting for the middle frame loading robot 8 to place the next set of middle frames to be welded into the slot 15 of the positioning template 14.

[0075] The middle frame is automatically fixed after placement without manual intervention, which can quickly complete the positioning and fixation, improve efficiency and accuracy, and avoid damage caused by misoperation. After welding, it is moved to the cleaning area and automatically unlocked for subsequent gripping. At the same time, air blowing and suction cleaning can remove impurities, prevent contamination and affect subsequent processes, and is linked with the operation of the equipment, with a high degree of automation.

[0076] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for steel sheets on the front and back sides of a mobile phone frame, characterized in that, Includes a chassis (1), a welding platform (2) is provided inside the chassis (1), a number of welding sheet feeding feeders (3) are provided on one side of the welding platform (2), a number of welding sheet feeding robots (4) are provided on the welding platform (2), an electric slide rail (5) is fixedly connected to the welding platform (2), a laser welding module (6) is slidably connected to the electric slide rail (5), a middle frame feeding conveyor belt (7) is provided on the outside of the chassis (1), a middle frame feeding robot (8) is provided on the side of the welding platform (2) near the laser welding module (6), and two sets of middle frame feeding platforms (9) are provided on the welding platform (2). The middle frame loading platform (9) includes a horizontally arranged linear motor (10), a slide table (11) is slidably connected to the linear motor (10), a base plate (13) is connected to the slide table (11) via a support (12), a positioning template (14) is detachably connected to the base plate (13), a slot (15) corresponding to the middle frame is provided on the positioning template (14), a negative pressure adsorption component is provided at the bottom of the slot (15), and the negative pressure adsorption component is connected to the negative pressure pump through a negative pressure pipeline; The support (12) is connected to a double-headed cylinder (16). Both ends of the double-headed cylinder (16) are fixedly connected to vertically arranged telescopic cylinders (17). The upper end of the telescopic cylinder (17) is connected to a positioning plate (18). Several sets of extrusion plates (19) are detachably connected to the upper surface of the positioning plate (18). The lower surface of the end of the extrusion plate (19) is connected to a positioning seat (20). The double-headed cylinder (16) is connected to the negative pressure pipeline through a connecting pipe and a first pressure relief valve. The telescopic cylinder (17) is connected to the negative pressure pipeline through a connecting pipe and a second pressure relief valve. The opening pressure of the second pressure relief valve is greater than that of the first pressure relief valve. The negative pressure adsorption assembly includes several sets of first through holes (21) on the positioning template (14), several sets of second through holes (22) communicating with the first through holes (21) on the upper surface of the base plate (13), and a connecting connector (23) communicating with several sets of second through holes (22) on one side of the base plate (13). The connecting connector (23) is connected to the negative pressure pipeline through a connecting pipe. Both the positioning template (14) and the base plate (13) are provided with through holes (24). A vertically arranged pressing rod (25) is slidably connected in the opening (24). A horizontally arranged limiting plate (26) is fixedly connected to the lower end of the pressing rod (25). A reset spring (27) is fixedly connected between the upper surface of the limiting plate (26) and the lower surface of the base plate (13).

2. The welding equipment for the front and back steel sheets of a mobile phone frame according to claim 1, characterized in that, The linear motor (10) is provided with a fixed plate (28) on both sides that is connected to the welding platform (2). A horizontally arranged cleaning plate (29) is fixedly connected between the two sets of fixed plates (28). Air nozzles (30) are provided on both sides of the lower surface of the cleaning plate (29). Several sets of suction nozzles (31) are provided on the lower surface of the middle part of the cleaning plate (29). Air nozzles (32) and suction nozzles (33) are provided on the cleaning plate (29) respectively connected to the air nozzles (30) and suction nozzles (31).

3. The welding equipment for the front and back steel sheets of a mobile phone frame according to claim 2, characterized in that, Both sets of fixed plates (28) are provided with extrusion connecting components, and the two sets of extrusion connecting components are respectively connected to the air blowing connector (32) and the air extraction connector (33); Both sets of the extrusion connection components include a pressing valve (34) disposed on the side of the fixed plate (28) away from the linear motor (10). The valve stem of the pressing valve (34) passes through the fixed plate (28) and is connected to the bracket (35). The bracket (35) is rotatably connected to the vertically arranged auxiliary roller (36). The four corner positions of the support (12) are provided with wedge-shaped extrusion surfaces (37). One set of the pressing valves (34) is connected to the air supply structure and the air blowing connector (32) through the pipeline. The other set of the pressing valves (34) is connected to the negative pressure pipeline and the air extraction connector (33) through the connecting pipe.

4. The welding equipment for the front and back steel sheets of a mobile phone frame according to claim 3, characterized in that, The fixed plate (28) is provided with several sets of positioning holes (38). The bracket (35) is provided with a horizontally arranged positioning rod (39) on the side away from the auxiliary roller (36). One end of the positioning rod (39) passes through the positioning hole (38) and is slidably connected to the positioning hole (38). A compression spring (40) is fixedly connected between the end of the positioning rod (39) away from the bracket (35) and the fixed plate (28).

5. The welding equipment for the front and back steel sheets of a mobile phone frame according to claim 4, characterized in that, The air supply structure includes an elastic air storage pad (41) horizontally arranged on both sides of the linear motor (10). The end of the elastic air storage pad (41) away from the laser welding module (6) is connected to a one-way air inlet valve (46) and a one-way air outlet valve (42). The one-way air outlet valve (42) is connected to a set of press valves (34) through a pipeline. Both ends of the slide (11) are connected to support plates (43). The support plates (43) are rotatably connected to the pressing rollers (44) that are pressed against the elastic air storage pad (41).

6. The welding equipment for the front and back steel sheets of a mobile phone frame according to claim 5, characterized in that, The outer side of the chassis (1) is equipped with a control platform (45) for controlling the sheet feeding feeder (3), sheet feeding robot (4), electric slide rail (5), laser welding module (6), middle frame feeding robot (8) and linear motor (10).

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