A feeding and discharging device for plate production and a method for using the same

Abstract

The application relates to the technical field of plate production, and discloses a feeding and discharging device for plate production and a using method thereof. The feeding and discharging device comprises a top frame, a feeding frame and a discharging frame capable of horizontally sliding on the top frame, pickup mechanisms arranged at the bottoms of the feeding frame and the discharging frame, a driving mechanism arranged at the outer side of the top frame and used for driving the feeding frame and the discharging frame to slide relative to each other, and two guide rails fixed in the top frame and used for lifting the picked plates on the bottom of the discharging frame upwards to cross the bottom of the feeding frame when the discharging frame slides towards the feeding frame. In the application, the driving mechanism is used for driving the discharging frame to repeatedly perform the processes of plate suction and discharging. During the discharging process, the discharging frame is limited to slide in the limiting grooves of the guide rails, the picked plates are lifted upwards to cross the plates picked by the feeding frame, and then the alternate feeding and discharging are realized. Compared with the prior art, the application can realize the continuity of plate processing and improve the production efficiency by adopting the alternate feeding and discharging mode.

Description

Technical Field

[0001] This invention relates to the field of sheet metal production technology, specifically to a feeding and unloading device for sheet metal production and its usage method. Background Technology

[0002] The production of sheet metal requires precise machining using machine tools. However, the low level of automation in the loading and unloading of sheet metal during machine tool processing significantly impacts processing efficiency. For large-format and heavy sheet metal, loading and unloading are extremely difficult, often requiring additional engineering machinery to assist, which can easily lead to safety accidents.

[0003] A search revealed that prior art patent CN111302049B discloses a sheet metal loading and unloading system and its control method. The system includes a controller, a frame device, a loading device, and a unloading device, both mounted on the frame device. The frame device has a first track mechanism and a second track mechanism stacked on top of each other, with the planes of the first and second track mechanisms parallel to each other. The unloading device is mounted on the first track mechanism, and the loading device is mounted on the second track mechanism. This sheet metal loading and unloading system automates the loading and unloading of sheet metal processing machinery, reducing the risks of manual operation and improving the efficiency of the machinery. The loading device can be stacked on top of the unloading device, resulting in a small footprint, flexible positioning, and convenient operation.

[0004] However, the existing patented technology still has the following problems: the above-mentioned loading and unloading system requires two independent transmission systems to realize the automatic loading and unloading of the sheet metal processing machinery. It has high control requirements for the continuous production of sheet metal processing, which increases the equipment cost. In addition, it is difficult to ensure the constant force of the suction when using only conventional suction cups. During the suction and unloading process, the suction is prone to loosening due to shaking. Summary of the Invention

[0005] This invention proposes a loading and unloading device for sheet production and its usage method, which solves the problems of insufficient production continuity and insufficient suction stability in the prior art.

[0006] The technical solution of the present invention is as follows: A loading and unloading device for sheet metal production includes a top frame, and a loading rack and a unloading rack that can slide horizontally on the top frame. A picking mechanism is provided at the bottom of both the loading rack and the unloading rack. A driving mechanism is provided on the outer side of the top frame to drive the loading rack and the unloading rack to slide relative to each other. Two guide rails are fixed inside the top frame to force the sheet metal picked up from the bottom of the unloading rack to be lifted upwards to pass over the bottom of the loading rack when the unloading rack slides to the loading rack. The picking mechanism includes a fixed platform, a movable platform, and a movable plate arranged horizontally from top to bottom. A cylinder is fixed on the top surface of the fixed platform to drive the movable platform to perform lifting and lowering movements. A suction nozzle assembly for suctioning the sheet metal is embedded in the movable plate. A support assembly and a transmission assembly that can drive the support assembly to support the sheet metal when the suction nozzle assembly lifts the sheet metal are provided between the movable platform and the cylinder.

[0007] Preferably, the drive mechanism includes a motor and a gearbox that matches the motor. The top frame is rotatably connected to two shafts. Both ends of the two shafts are fixed with synchronous pulleys. The synchronous pulleys on the two shafts are connected by a synchronous belt. The output end of the gearbox is fixedly connected to one of the shafts. The loading frame is fixed to the upper half of the synchronous belt, and the unloading frame is fixed to the lower half of the synchronous belt.

[0008] Preferably, the guide rail has a limiting groove, the two ends of which are straight and the middle part is raised upward.

[0009] Preferably, a fixed rod is slidably connected inside the unloading rack, a limiting rod located in the limiting groove is fixed on one side of the top of the fixed rod, and the bottom end of the fixed rod is fixed to the fixed platform.

[0010] Preferably, the movable platform is fixed to the output end of the cylinder, and a guide rod that is vertically slidably connected to the fixed platform is fixed on the top surface of the movable platform.

[0011] Preferably, a through hole is provided at the center of the movable plate, a fixing ring is fixed in the through hole, and pressure rods are fixed on both sides of the top surface of the fixing ring.

[0012] Preferably, the transmission assembly includes a rotating shaft, which is rotatably connected to the movable platform, and a torsion spring is engaged at the rotatable connection. A turntable is fixed to the bottom of the rotating shaft, and a steering column capable of passing through a fixed ring is fixed to the bottom of the turntable. Two helical lugs that contact the pressure rod are fixed on the surface of the steering column, and the two helical lugs are rotationally symmetrical about the axis of the steering column.

[0013] Preferably, the supporting assembly includes a first curved arm and a second curved arm, which are hinged together by a first positioning shaft. The first positioning shaft is rotatably connected to the movable platform. A support is fixed to the bottom of the first and second curved arms at the ends away from the hinge. A first thrust rod is hinged to the ends of the first and second curved arms at the ends away from the hinge. A second positioning shaft is rotatably connected to the bottom of the movable platform. A swing arm is hinged to the outside of the second positioning shaft. The swing arm is Y-shaped. Two ends of the swing arm are respectively hinged to the first thrust rods of the first and second curved arms. The remaining end of the swing arm is hinged to a second thrust rod. The end of the second thrust rod away from the swing arm is hinged to a turntable.

[0014] Preferably, the suction nozzle assembly includes an electric telescopic rod fixed to the top surface of the movable platform. An air cylinder is fixedly inserted through the movable plate. The output end of the electric telescopic rod passes through the movable platform and is fixedly fitted with a first piston slidably disposed inside the air cylinder. A second piston is slidably disposed on the inner bottom side of the air cylinder. A stop ring is fixed inside the air cylinder to limit the sliding movement of the second piston. A suction cup is fixed to the bottom of the air cylinder. A folded flexible tube is sleeved on the outer side of the air cylinder. The two ends of the folded flexible tube are respectively sealed and fixed to the movable platform and the movable plate. An air guide hole is opened at the location of the air cylinder inside the folded flexible tube. An electromagnetic lock core for locking the upward movement of the second piston is fixed inside the air cylinder.

[0015] Based on the above-mentioned loading and unloading device for sheet metal production, the present invention also proposes a method of using the loading and unloading device, comprising the following steps: Step 1: Material suction. The material to be processed is placed below the loading rack. The cylinder drives the movable platform and movable plate to move downwards and close to the material. The negative pressure of the suction nozzle assembly sucks up the material. The cylinder drives the movable platform and movable plate to lift the material upwards. Step 2: Supporting the board. The suction nozzle assembly increases suction as the distance between the movable platform and the movable plate decreases, bringing the board to the support height position of the support assembly. During this process, the support assembly, driven by the transmission assembly, begins to narrow towards the board until it supports the board. Step 3: Loading the sheet material. The drive mechanism drives the loading rack to move towards the direction of the lower rack until it reaches the predetermined processing position of the machine tool. The cylinder drives the movable platform and movable plate to move downward. The suction nozzle assembly releases the sheet material, and at the same time, the support assembly expands outward under the drive of the transmission assembly until the sheet material is placed down smoothly, completing the loading. Step four, unloading the sheet material: the drive mechanism drives the loading and unloading racks to reciprocate back and forth to their original positions. After processing, the picking mechanism at the bottom of the unloading rack repeats the sheet material picking process in step one. Then, the drive mechanism reverses its operation to drive the unloading rack to the position of the loading rack. The cylinder drives the movable platform and movable plate to move downwards. The suction nozzle assembly releases the sheet material, while the support assembly expands outwards under the drive of the transmission assembly until the sheet material is smoothly placed down, completing the unloading process. Step 5: During the process of step 4, the drive mechanism drives the unloading rack to repeat the processes of steps 1, 2 and 3. During the unloading process, the unloading rack, in cooperation with the guide rail, lifts the picked-up board upwards to pass over the board picked up by the loading rack, thereby realizing alternating loading and unloading.

[0016] The beneficial effects of this invention are as follows: In this invention, the feeding rack is driven by a drive mechanism to repeat the process of picking up and feeding the board. During the feeding process, the feeding rack slides and is limited by the guide rail's limiting groove, lifting the picked-up board upwards to pass over the board picked up by the loading rack, thereby realizing alternating loading and unloading. Compared with the prior art, the alternating loading and unloading method of this invention can realize the continuity of board processing and improve production efficiency. The suction nozzle assembly of this invention increases suction power. After the distance between the movable platform and the movable plate is reduced, the plate is positioned at the holding height of the holding assembly. During this process, the holding assembly, driven by the transmission assembly, begins to narrow towards the plate until it holds the plate. The drive mechanism drives the loading rack to move towards the loading rack until it reaches the predetermined processing position of the machine tool. The cylinder drives the movable platform and the movable plate to move downward, and the suction nozzle assembly releases the plate. At the same time, the holding assembly, driven by the transmission assembly, expands outward until the plate is smoothly lowered. Compared with the prior art, the sampling stable air pressure suction combined with the auxiliary holding function of this invention can ensure the stability of the loading and unloading of the plate. During the lifting process, the electric telescopic rod continues to work to increase the suction force. During this process, the second piston is blocked by the stop ring and keeps in a fixed position. The electromagnetic lock core works to lock the second piston, so that the suction force in the suction cup can be kept constant, thereby achieving stable suction of the plate. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of a feeding and unloading device for sheet metal production proposed in this invention; Figure 2 This is a schematic diagram of the structure of a feeding and unloading device for sheet metal production proposed in this invention from another perspective; Figure 3This is a schematic diagram of the top frame, loading frame, and unloading frame structure proposed in this invention; Figure 4 This is a schematic diagram of the fixed platform, movable platform, and movable plate structure proposed in this invention; Figure 5 This is a schematic diagram of the support component structure proposed in this invention; Figure 6 This is a schematic diagram of the movable plate and transmission assembly structure proposed in this invention; Figure 7 This is a schematic diagram of the transmission component structure proposed in this invention; Figure 8 This is a schematic diagram of a half-section of the suction nozzle assembly proposed in this invention; In the diagram: 1. Top frame; 2. Loading frame; 3. Unloading frame; 31. Fixed rod; 32. Limiting rod; 4. Picking mechanism; 41. Fixed platform; 42. Movable platform; 421. Guide rod; 43. Cylinder; 44. Movable plate; 441. Through hole; 442. Fixed ring; 443. Pressure rod; 45. Suction nozzle assembly; 451. Electric telescopic rod; 452. Air cylinder; 453. First piston; 454. Second piston; 455. Stop ring; 456. Suction cup; 457. Folded hose; 458. Air guide hole; 45 9. Electromagnetic lock core; 46. Support assembly; 461. First curved arm; 462. Second curved arm; 463. First positioning shaft; 464. Support; 465. First thrust rod; 466. Swing arm; 467. Second positioning shaft; 468. Second thrust rod; 47. Transmission assembly; 471. Rotary shaft; 472. Turntable; 473. Steering column; 474. Helical lug; 5. Drive mechanism; 51. Motor; 52. Gearbox; 53. Shaft; 54. Synchronous pulley; 55. Synchronous belt; 6. Guide rail; 61. Limit groove. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1 and Figure 2This invention provides a technical solution: a loading and unloading device for sheet production, including a top frame 1, and a loading rack 2 and a unloading rack 3 that can slide horizontally on the top frame 1. A picking mechanism 4 is provided at the bottom of both the loading rack 2 and the unloading rack 3. A driving mechanism 5 is provided on the outer side of the top frame 1 to drive the loading rack 2 and the unloading rack 3 to slide relative to each other. Two guide rails 6 are fixed inside the top frame 1, which force the sheet picked up by the bottom of the unloading rack 3 to be lifted upwards to pass over the bottom of the loading rack 2 when the unloading rack 3 slides towards the loading rack 2. The picking mechanism 4 includes a fixed platform 41, a movable platform 42, and a movable plate 44 arranged horizontally from top to bottom. A cylinder 43 is fixed on the top surface of the fixed platform 41 to drive the movable platform 42 to perform lifting and lowering movements. A suction nozzle assembly 45 for suctioning the sheet is embedded on the movable plate 44. A support assembly 46 and a transmission assembly 47 are provided between the movable platform 42 and the cylinder 43, which can drive the support assembly 46 to support the sheet when the suction nozzle assembly 45 lifts the sheet.

[0021] Please see Figure 3 The drive mechanism 5 includes a motor 51 and a gearbox 52 that is matched with the motor 51. The top frame 1 is rotatably connected to two shafts 53. Both ends of the two shafts 53 are fixed with synchronous pulleys 54. The synchronous pulleys 54 on the two shafts 53 are connected by a synchronous belt 55. The output end of the gearbox 52 is fixedly connected to one of the shafts 53. The loading frame 2 is fixed to the upper half of the synchronous belt 55, and the unloading frame 3 is fixed to the lower half of the synchronous belt 55. The motor 51 and the gearbox 52 drive the synchronous pulleys 54. The synchronous pulleys 54 and the synchronous belt 55 drive the two shafts 53 to rotate synchronously. Since the loading frame 2 and the unloading frame 3 are fixed to the upper and lower parts of the synchronous belt 55 respectively, the loading frame 2 and the unloading frame 3 can be driven to move relative to each other.

[0022] Please see Figure 2 and Figure 3 A limiting groove 61 is provided on the guide rail 6. The two ends of the limiting groove 61 are flat and the middle is raised upward. A fixed rod 31 is slidably connected inside the unloading rack 3. A limiting rod 32 is fixed on one side of the top of the fixed rod 31 and located in the limiting groove 61. The bottom end of the fixed rod 31 is fixed on the fixed platform 41. The unloading rack 3 is driven by the drive mechanism 5 to repeat the process of picking up and unloading the board. During the unloading process, the unloading rack 3 is lifted upward by the sliding limit of the limiting groove 61 of the guide rail 6 to pass over the board picked up by the loading rack 2, thereby realizing alternating loading and unloading.

[0023] Please see Figure 4 and Figure 5 The movable platform 42 is fixed to the output end of the cylinder 43. The top surface of the movable platform 42 is fixed with a guide rod 421 that is vertically slidably connected to the fixed platform 41. This guide rod is used to guide the movement of the movable platform 42 and increase its stability.

[0024] Please see Figure 6 and Figure 7 A through hole 441 is provided at the center of the movable plate 44. A fixing ring 442 is fixed inside the through hole 441. Pressure rods 443 are fixed on both sides of the top surface of the fixing ring 442. The transmission assembly 47 includes a rotating shaft 471, which is rotatably connected to the movable platform 42. A torsion spring (not shown in the figure) is engaged at the rotatable connection. A turntable 472 is fixed at the bottom of the rotating shaft 471. A steering column 473 that can pass through the fixing ring 442 is fixed at the bottom of the turntable 472. Two helical lugs 474 are fixed on the cylindrical surface of the 3 column and are in contact with the pressure rod 443. The two helical lugs 474 are rotationally symmetrical about the axis of the steering column 473. The reduction of the distance between the movable platform 42 and the movable plate 44 can make the plate position at the support height of the support assembly 46. During this process, the through holes 441 on both sides of the fixed ring 442 can squeeze the helical lugs 474, so that the steering column 473 drives the turntable 472 to rotate around the axis 471.

[0025] Please see Figure 5 The supporting assembly 46 includes a first curved arm 461 and a second curved arm 462, which are hinged together by a first positioning shaft 463. The first positioning shaft 463 is rotatably connected to the movable platform 42. A support 464 is fixed to the bottom of the ends of both the first curved arm 461 and the second curved arm 462 away from the hinge. A first thrust rod 465 is hinged to the ends of both the first curved arm 461 and the second curved arm 462 away from the hinge. A second positioning shaft 467 is rotatably connected to the bottom of the movable platform 42. A swing arm 466 is hinged to the outer side of the second positioning shaft 467. The swing arm 466 is Y-shaped, with two ends of the swing arm 466 respectively... The first thrust rod 465 of the first curved arm 461 and the second curved arm 462 are hinged together. The remaining end of the swing arm 466 is hinged to the second thrust rod 468. The end of the second thrust rod 468 away from the swing arm 466 is hinged to the turntable 472. During the process of the steering column 473 driving the turntable 472 to rotate around the pivot 471, the second thrust rod 468 pushes the swing arm 466. The swing arm 466 pulls the two first thrust rods 465 respectively, thereby driving the first curved arm 461 and the second curved arm 462 to retract towards the plate synchronously until the support 464 on the first curved arm 461 and the second curved arm 462 supports the plate.

[0026] Please see Figure 5 and Figure 8The suction nozzle assembly 45 includes an electric telescopic rod 451, which is fixed to the top surface of the movable platform 42. An air cylinder 452 is fixedly inserted through the movable plate 44. The output end of the electric telescopic rod 451 passes through the movable platform 42 and is fixedly fitted with a first piston 453 that is slidably disposed inside the air cylinder 452. A second piston 454 is slidably disposed on the inner bottom side of the air cylinder 452. A stop ring 455 is fixed inside the air cylinder 452 to limit the sliding movement of the second piston 454. A suction cup 456 is fixed to the bottom of the air cylinder 452. A folded hose 457 is sleeved on the outer side of the air cylinder 452. The two ends of the folded hose 457 are respectively sealed and fixed to the movable platform 42 and the movable plate 44. An air guide hole 458 is opened in the part of the air cylinder 452 located inside the folded hose 457. An electromagnetic lock core 459 for locking the second piston 454 upward is fixed inside the air cylinder 452. In the initial state, the electromagnetic valve on the second piston 454 is contracted, allowing air to pass through. The operation of the electric telescopic rod 451 drives the first piston 453 to rise, thereby creating a negative pressure between the first piston 453 and the second piston 454. Under the action of the negative pressure, the second piston 454 moves upward and is then sucked up by the negative pressure environment in the suction cup 456. The cylinder 43 drives the movable platform 42 and the movable plate 44 to lift the plate upward. During the lifting process, the electric telescopic rod 451 continues to work to increase the suction force. During this process, the second piston 454 is blocked by the stop ring 455 and keeps in a fixed position. The electromagnetic lock core 459 locks the second piston 454, so that the suction force in the suction cup 456 can remain constant. The continued upward movement of the first piston 453 will exceed the height of the air guide hole 458. As the height of the first piston 453 increases, the air in the folded hose 457 can be drawn into the air cylinder 452, thereby causing the folded hose 457 to gradually contract.

[0027] Based on the above embodiments, the present invention proposes a method for using a loading and unloading device, comprising the following steps: Step 1: The board to be processed is placed below the loading rack 2. The cylinder 43 drives the movable platform 42 and movable plate 44 to move downwards and close to the board. The negative pressure of the suction nozzle assembly 45 sucks up the board. The cylinder 43 drives the movable platform 42 and movable plate 44 to lift the board upwards. Step 2, supporting the board: The suction nozzle assembly 45 increases suction force. After the distance between the movable platform 42 and the movable plate 44 is reduced, the board is placed at the supporting height position of the supporting assembly 46. During this process, the supporting assembly 46 begins to narrow towards the board under the drive of the transmission assembly 47 until the board is supported. Step 3: Loading the sheet material. The drive mechanism 5 drives the loading rack 2 to move towards the direction of the lower rack 3 until it reaches the predetermined processing position of the machine tool. The cylinder 43 drives the movable platform 42 and the movable plate 44 to move downward. The suction nozzle assembly 45 releases the sheet material, and at the same time, the support assembly 46 expands outward under the drive of the transmission assembly 47 until the sheet material is placed down smoothly, completing the loading. Step four, unloading the board: the drive mechanism 5 drives the loading rack 2 and unloading rack 3 to reciprocate back and forth to their original positions. After processing, the picking mechanism 4 at the bottom of the unloading rack 3 repeats the board picking process in step one. Then, the drive mechanism 5 reverses its operation to drive the unloading rack 3 to move to the position of the loading rack 2. The cylinder 43 drives the movable platform 42 and movable plate 44 to move downward. The suction nozzle assembly 45 releases the board, and at the same time, the holding assembly 46 expands outward under the drive of the transmission assembly 47 until the board is placed down smoothly, completing the unloading. Step 5: During the process of step 4, the drive mechanism 5 drives the unloading rack 3 to repeat the processes of step 1, step 2 and step 3. During the unloading process, the unloading rack 3, in cooperation with the guide rail 6, lifts the picked-up board upward to pass over the board picked up by the loading rack 2, thereby realizing alternating loading and unloading.

[0028] The working principle and usage process of this invention are as follows: The plate to be processed is placed below the loading rack 2. The cylinder 43 drives the movable platform 42 and the movable plate 44 to move downwards and approach the plate until the suction cup 456 at the end of the air cylinder 452 presses against the surface of the plate. In the initial state, the solenoid valve on the second piston 454 contracts, and the electric telescopic rod 451 drives the first piston 453 to rise upwards, thereby forming a negative pressure between the first piston 453 and the second piston 454. Under the action of the negative pressure, the second piston 454 moves upwards, and the plate is sucked up by the negative pressure environment in the suction cup 456. The cylinder 43 drives the movable platform 42 and the movable plate 44 to lift the plate upwards. During the lifting process, the electric telescopic rod 451 continues to operate to increase suction. During this process, the second piston 454 remains fixed in position due to the stop ring 455, while the electromagnetic lock core 459 locks the second piston 454, ensuring that the suction force within the suction cup 456 remains constant. The continued upward movement of the first piston 453 exceeds the height of the air vent 458. As the height of the first piston 453 increases, air is drawn from the folded hose 457 into the air cylinder 452, causing the folded hose 457 to gradually contract. This means the movable platform 42 and the... The spacing between the moving plates 44 is also decreasing, which allows the plate to be positioned at the support height of the support assembly 46. During this process, the through holes 441 on both sides of the fixing ring 442 can squeeze the spiral lugs 474, causing the steering column 473 to drive the turntable 472 to rotate around the pivot 471. Then, under the action of the second thrust rod 468, the swing arm 466 is pushed, and the swing arm 466 pulls the two first thrust rods 465 respectively, which in turn causes the first bent arm 461 and the second bent arm 462 to retract towards the plate synchronously until the support 464 on the first bent arm 461 and the second bent arm 462 supports the plate. Then, the motor 51 and the gearbox 52 drive the synchronous pulley 54, and the synchronous pulley 54 and the synchronous belt 55 drive the two shafts 53 to rotate synchronously. Since the loading rack 2 and the unloading rack 3 are respectively fixed to the upper and lower parts of the synchronous belt 55, the loading rack 2 and the unloading rack 3 can be driven to move relative to each other until the plate picked up below the loading rack 2 reaches the predetermined processing position of the machine tool. The cylinder 43 drives the movable platform 42 and the movable plate 44 to move downward. The electric telescopic rod 451 pushes the first piston 453 to move downward, so that the air in the air cylinder 452 is filled into the folded hose 457, causing the folded hose 457 to gradually expand. That is, the distance between the movable platform 42 and the movable plate 44 is also decreasing. At the same time, the holding component 46 expands outward under the drive of the transmission component 47 until it is completely separated from the plate. Then the electromagnetic lock core 459 begins to retract, thereby breaking the negative pressure environment in the suction cup 456, so that the plate can be put down to complete the loading. Driven by the drive mechanism 5, the loading rack 2 and the unloading rack 3 reciprocate back and forth to their original positions. After processing, the picking mechanism 4 at the bottom of the unloading rack 3 repeats the above-mentioned board picking process. Then, the drive mechanism 5 reverses its operation to drive the unloading rack 3 to move to the position of the loading rack 2. The cylinder 43 drives the movable platform 42 and the movable plate 44 to move downward. The suction nozzle assembly 45 releases the board, and at the same time, the holding assembly 46 expands outward under the drive of the transmission assembly 47 until the board is smoothly placed down, completing the unloading process. During the above-mentioned unloading process, the drive mechanism 5 drives the unloading rack 3 to repeat the process of picking up and unloading the board. During the unloading process, the unloading rack 3 is lifted upward by the sliding limit groove 61 of the guide rail 6 to pass over the board picked up by the loading rack 2, thereby realizing alternating loading and unloading. It can ensure stable picking up of the board during loading and unloading, and prevent the board from falling off due to insufficient picking up.

[0029] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A loading and unloading device for sheet metal production, comprising a top frame (1), and a loading rack (2) and a unloading rack (3) capable of horizontally sliding on the top frame (1), characterized in that, Both the loading rack (2) and the unloading rack (3) are equipped with a picking mechanism (4) at their bottoms. The outer side of the top frame (1) is equipped with a driving mechanism (5) for driving the loading rack (2) and the unloading rack (3) to slide relative to each other. The top frame (1) has two guide rails (6) fixed inside for lifting the board picked up by the bottom of the unloading rack (3) upwards to pass over the bottom of the loading rack (2) when the unloading rack (3) slides to the loading rack (2). The picking mechanism (4) includes a fixed flat plate arranged horizontally from top to bottom. The fixed platform (41), the movable platform (42), and the movable plate (44) are provided. The top surface of the fixed platform (41) is fixed with a cylinder (43) for driving the movable platform (42) to move up and down. The movable plate (44) is embedded with a suction nozzle assembly (45) for sucking up the board. A support assembly (46) and a transmission assembly (47) are provided between the movable platform (42) and the cylinder (43). When the suction nozzle assembly (45) lifts the board, it can drive the support assembly (46) to support the board. The movable plate (44) has a through hole (441) at its center, a fixing ring (442) is fixed inside the through hole (441), and pressure rods (443) are fixed on both sides of the top surface of the fixing ring (442). The transmission assembly (47) includes a rotating shaft (471), which is rotatably connected to the movable platform (42), and a torsion spring is engaged at the rotatable connection. A turntable (472) is fixed at the bottom of the rotating shaft (471), and a steering column (473) that can pass through a fixed ring (442) is fixed at the bottom of the turntable (472). Two helical lugs (474) that contact the pressure rod (443) are fixed on the cylindrical surface of the steering column (473). The two helical lugs (474) are rotationally symmetrical about the axis of the steering column (473). The supporting assembly (46) includes a first curved arm (461) and a second curved arm (462), which are hinged together by a first positioning shaft (463). The first positioning shaft (463) is rotatably connected to the movable platform (42). A support (464) is fixed to the bottom of the end of both the first curved arm (461) and the second curved arm (462) away from the hinge. A first thrust rod (465) is hinged to the end of both the first curved arm (461) and the second curved arm (462) away from the hinge. The bottom of the activity platform (42) is rotatably connected to a second positioning shaft (467). A swing arm (466) is hinged to the outside of the second positioning shaft (467). The swing arm (466) is Y-shaped. Two ends of the swing arm (466) are respectively hinged to the first thrust rod (465) of the first curved arm (461) and the second curved arm (462). The remaining end of the swing arm (466) is hinged to a second thrust rod (468). The end of the second thrust rod (468) away from the swing arm (466) is hinged to the turntable (472).

2. The loading and unloading device for sheet metal production according to claim 1, characterized in that, The drive mechanism (5) includes a motor (51) and a gearbox (52) that is matched with the motor (51). The top frame (1) is rotatably connected to two shafts (53). Both ends of the two shafts (53) are fixed with synchronous pulleys (54). The synchronous pulleys (54) on the two shafts (53) are connected by a synchronous belt (55). The output end of the gearbox (52) is fixedly connected to one of the shafts (53). The loading rack (2) is fixed to the upper half of the synchronous belt (55), and the unloading rack (3) is fixed to the lower half of the synchronous belt (55).

3. The loading and unloading device for sheet metal production according to claim 1, characterized in that, The guide rail (6) has a limiting groove (61) with straight ends and an upward protrusion in the middle.

4. The loading and unloading device for sheet metal production according to claim 3, characterized in that, The unloading rack (3) is slidably connected to a fixed rod (31). A limiting rod (32) is fixed on one side of the top of the fixed rod (31) and located in the limiting groove (61). The bottom end of the fixed rod (31) is fixed on the fixed platform (41).

5. The loading and unloading device for sheet metal production according to claim 1, characterized in that, The movable platform (42) is fixed to the output end of the cylinder (43), and the top surface of the movable platform (42) is fixed with a guide rod (421) that is vertically slidably connected to the fixed platform (41).

6. The loading and unloading device for sheet metal production according to claim 1, characterized in that, The suction nozzle assembly (45) includes an electric telescopic rod (451), which is fixed to the top surface of the movable platform (42). An air cylinder (452) is fixedly inserted through the movable plate (44). The output end of the electric telescopic rod (451) passes through the movable platform (42) and is fixedly fitted with a first piston (453) that is slidably disposed inside the air cylinder (452). A second piston (454) is slidably disposed on the inner bottom side of the air cylinder (452). A pair of pistons (454) is fixed inside the air cylinder (452). The air cylinder (452) has a sliding limit stop ring (455), a suction cup (456) is fixed at the bottom of the air cylinder (452), a folded hose (457) is sleeved on the outside of the air cylinder (452), the two ends of the folded hose (457) are respectively sealed and fixed to the movable platform (42) and the movable plate (44), an air guide hole (458) is opened in the part of the air cylinder (452) located inside the folded hose (457), and an electromagnetic lock core (459) for locking the second piston (454) upward is fixed inside the air cylinder (452).

7. A method of using a loading and unloading device, as described in claim 1, characterized in that, Includes the following steps: Step 1, the board is picked up. The board to be processed is placed below the loading rack (2). The cylinder (43) drives the movable platform (42) and movable plate (44) to come down close to the board. The negative pressure of the suction nozzle assembly (45) sucks up the board. The cylinder (43) drives the movable platform (42) and movable plate (44) to lift the board up. Step 2, support of the board: The suction nozzle assembly (45) increases the suction force. After the distance between the movable platform (42) and the movable plate (44) is reduced, the board is placed at the support height position of the support assembly (46). During this process, the support assembly (46) begins to narrow towards the board under the drive of the transmission assembly (47) until the board is supported. Step 3: Loading the board. The drive mechanism (5) drives the loading rack (2) to move in the direction of the lower rack (3) until it reaches the predetermined processing position of the machine tool. The cylinder (43) drives the movable platform (42) and the movable plate (44) to move downward. The suction nozzle assembly (45) releases the board. At the same time, the support assembly (46) expands outward under the drive of the transmission assembly (47) until the board is placed down smoothly, completing the loading. Step 4, unloading the board: the drive mechanism (5) drives the loading rack (2) and unloading rack (3) to reciprocate back and forth to their original positions. After processing, the picking mechanism (4) at the bottom of the unloading rack (3) repeats the board picking process in Step 1. Then, the drive mechanism (5) reverses its operation to drive the unloading rack (3) to move to the position of the loading rack (2). The cylinder (43) drives the movable platform (42) and movable plate (44) to move downward. The suction nozzle assembly (45) releases the board. At the same time, the holding assembly (46) expands outward under the drive of the transmission assembly (47) until the board is smoothly placed down, completing the unloading. Step 5: In the process of step 4, the drive mechanism (5) drives the unloading rack (3) to repeat the processes of step 1, step 2 and step 3. During the unloading process, the unloading rack (3) cooperates with the guide rail (6) to lift the picked-up board upward to pass over the board picked up by the loading rack (2), thereby realizing alternating loading and unloading.

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