A fully automatic sheet metal loading and unloading punching machine

Abstract

The present invention relates to the technical field of stamping machines, specifically to a fully automatic sheet metal loading and unloading stamping machine, comprising a frame, a mounting plate provided on the frame, a punch provided below the mounting plate, a first drive assembly provided on the frame, a die provided on the frame, a loading platform provided on the right side of the frame, a first push rod provided on the loading platform, a grab assembly provided on the material storage platform, a unloading platform provided on the left side of the frame, a roller horizontally mounted on the frame, a plurality of material receiving platforms provided on the roller, a second drive assembly provided on the frame, and grinding sandpaper provided on the right side of the roller. When the roller rotates in the direction of the grinding sandpaper, the grinding sandpaper contacts the parts and removes burrs from the parts. The present invention provides a roller, and after the material receiving platform receives the stamped parts, the roller drives the parts to contact and grind with the grinding sandpaper, thereby realizing that the stamping machine automatically removes burrs and flash from the parts, thereby improving the production efficiency of the stamping machine.

Description

Technical Field

[0001] The present invention relates to the technical field of punching machines, in particular to a fully automatic sheet metal loading and unloading punching machine. Background Art

[0002] Stamping, as a forming process, uses a press and die to apply external force to sheets, strips, tubes, and profiles, causing them to plastically deform or separate, ultimately creating a workpiece with the desired shape and size. In the sheet metal cutting industry, stamping machines are a common tool due to their high efficiency and low processing costs.

[0003] In the drone production process, stamping machines are used to process many sheet metal parts. Plate-shaped support components like the drone's fuselage frame, partitions, and battery mounting plates, which require specific shapes, are all punched and cut using stamping machines.

[0004] During stamping and cutting, the punch of the press moves toward the die, squeezing the sheet metal through the die and breaking it, resulting in a plate-shaped part that conforms to the die's shape. However, during the cutting process, the sheet metal is actually pulled apart, resulting in burrs and flash on the edges of the cut plate-shaped part. Using t as the material thickness standard, the height of these burrs and flash ranges from approximately 5% to 10% of t. To ensure the part's subsequent function, these burrs and flash must be removed by grinding after stamping.

[0005] In the early days, traditional stamping machines were relatively simple, typically performing only the punching function, with loading and unloading often performed manually. While many stamping machines now feature automatic loading and unloading, unfortunately, they still lack the ability to remove burrs and flash from parts. Therefore, after unloading, sandpaper or other polishing equipment is still required to remove burrs and flash from stamped parts, which undoubtedly hinders continuous part processing and results in low part production efficiency.

[0006] Small drones, in particular, often use thinner panels to reduce weight. These thin panels are difficult to polish using machinery, often requiring manual sandpaper to remove burrs and flash. However, due to the thinness of the parts, manual polishing can easily cause them to warp and deform, ultimately leading to installation difficulties.

[0007] In view of the above problems, it is urgent to propose a fully automatic sheet metal loading and unloading punching machine to meet the actual needs of production and processing.

[0008] Therefore, a fully automatic sheet metal loading and unloading punching machine is proposed. Summary of the Invention

[0009] The purpose of the present invention is to provide a fully automatic sheet metal loading and unloading punching machine to solve the problem raised in the above background technology that the punching machine cannot automatically remove burrs and flash from the punched plate parts after punching.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A fully automatic sheet metal loading and unloading punching machine includes a frame, a mounting plate provided on the frame, a punch provided below the mounting plate, a first drive assembly provided on the frame for driving the mounting plate to move up and down, a die adapted to the punch fixedly mounted on the frame, the die being located directly below the punch, a loading platform provided on the right side of the frame, a first push rod provided on the loading platform, the first push rod being used to push the material horizontally toward the die, a material storage platform provided in front of the loading platform, the material storage platform being used to store the material, a grab assembly provided on the material storage platform being used to grab the material on the material storage platform and place it on the loading platform, a material unloading platform provided on the left side of the frame for storing waste material, a roller further horizontally mounted on the frame, the roller being located directly below the die, a plurality of material receiving platforms provided on the roller, the central angle between two adjacent material receiving platforms being the stroke angle. The plurality of material receiving platforms are evenly distributed on the drum with the drum axis as the reference circumference. The frame is provided with a second driving component for driving the drum to rotate. Each mounting plate is provided with a fixing component, and the fixing component is used to fix the parts falling from the die on the mounting plate. Grinding sandpaper is provided on the right side of the drum, and a collection tank is provided directly below the drum.

[0012] The material is gripped by a mechanical gripper and placed onto the loading platform. A first push rod on the loading platform pushes the material horizontally toward the die. Driven by the first drive assembly, the punch moves toward the die, striking the material against it. The punch, in conjunction with the die's cutting edge, punches and cuts a plate-like part from the material, identical in shape to the die. The first drive assembly then drives the punch upward to reset it. The first push rod pushes the material horizontally again toward the die, aligning the unpunched areas of the material with the die. This process is repeated to continuously stamp parts. When the material reaches a point where a complete part can no longer be stamped, it becomes waste. The push rod pushes the waste further toward the die, away from the die, and onto the unloading platform. Once the waste reaches the unloading platform, a second push rod pushes it down the platform, where it is stacked and automatically collected.

[0013] As the stamped parts fall from the die onto the drum, a second drive assembly drives the drum to rotate. This rotation causes the punch to reposition, resulting in the drum rotating toward the sandpaper. Once the punch is repositioned, the receiving platform is aligned vertically with the punch and die. This allows the part to land on the receiving platform as the punch stamps out. Once the part lands on the receiving platform, a securing assembly secures it to the platform. Then, when the punch is repositioned, the second drive assembly rotates the drum a certain distance toward the sandpaper, aligning the next receiving platform with the die and die. The receiving platform holding the part then rotates toward the sandpaper, bringing it into contact with the sandpaper. As production continues, the drum rotates, carrying the parts that have landed on the receiving platform, ensuring constant contact and relative displacement between the parts and the sandpaper, allowing the sandpaper to remove burrs and flash. When the drum, carrying the part, rotates to the point directly below it, the fixing assembly releases the part, allowing it to fall into the collection trough below for automatic collection. This allows the punching machine to remove burrs and flash from plate-shaped parts while simultaneously loading and unloading them. This eliminates the need to transfer the part to a grinding machine for burr and flash removal, effectively saving production time and improving efficiency.

[0014] It should be noted that, when the parts are separated from the material during the stamping process, the parts are downward while the material does not move, so the parts are actually in a state of being pulled apart from the material. Therefore, the burrs and flash on the parts will generally curl upward. Therefore, when the parts fall onto the receiving platform, the flash and burrs are usually located on the side away from the center of the drum, rather than on the side where the parts are in contact with the receiving platform. Therefore, when the drum rotates, sandpaper can effectively grind the burrs.

[0015] Preferably, the second driving assembly includes a transmission rod, which is vertically arranged and fixedly connected to the mounting plate and can move up and down with the punch. A ratchet is fixedly installed on the end of the roller, and a pawl that cooperates with the ratchet is rotatably installed on the lower end of the transmission rod. The pawl is arc-shaped and can swing up and down along a vertical plane. When the transmission rod moves up and down with the mounting plate for one cycle, the pawl hooks the ratchet and drives the ratchet to rotate, and the angle of rotation of the ratchet is the same as the stroke angle.

[0016] The ratchet and pawl work together. When the pawl follows the punch downward, it can rotate to avoid the punch by squeezing against the ratchet, allowing the pawl to pass over the ratchet and reach below it. When the pawl follows the punch upward to reset, it hooks onto the ratchet teeth on the ratchet, driving the ratchet to rotate in the direction of the sandpaper. By design, the pawl hooks onto the ratchet from bottom to top and moves upward until the pawl and ratchet disengage. The rotation angle of the ratchet is exactly the same as the stroke angle, allowing the roller to rotate intermittently. After each rotation, there is a material receiving platform located directly below the die to ensure that each stamped part falls onto the receiving platform. Compared to using a motor to control the rotation of the roller, controlling the rotation of the roller with the ratchet and pawl not only improves the synchronization of movement between the roller and the punch, but also reduces the production cost of the equipment as well as the cost required for control and maintenance.

[0017] Preferably, the fixing assembly includes a vacuum suction cup fixedly mounted on each material receiving platform, and the vacuum suction cup is connected to an external air extraction assembly for providing negative pressure to the vacuum suction cup.

[0018] Vacuum suction cups secure stamped parts to the receiving platform, preventing them from detaching during polishing and ensuring effective polishing of burrs and flash. Using vacuum suction cups to secure parts to the receiving platform offers the advantages of simple structure and compact size. This prevents the parts from being separated from the top surface of the drum, preventing them from interfering with the sandpaper and ensuring effective polishing. Furthermore, the suction of the vacuum cups pulls the parts toward the receiving platform, preventing them from becoming stuck in the die and unable to fall onto the platform, thereby improving the stability of the equipment during operation.

[0019] Using a vacuum suction cup to fix the parts to the receiving platform can effectively prevent thin parts from bending during the grinding process and avoid damage to the parts.

[0020] While magnetic attachment is similar to vacuum cup attachment, drone parts are typically made of aluminum, titanium, or plastic to maintain strength and lightweight, making them difficult to secure magnetically. Using vacuum cup attachment allows for a wider range of applications and improves the device's applicability.

[0021] Preferably, a vertical plate is fixedly installed on the right side of the drum, an airbag is fixedly installed on the vertical plate, the airbag is located between the drum and the vertical plate, a "C"-shaped reinforcing plate is fixedly installed on the side of the airbag facing the drum, the axis of the "C"-shaped reinforcing plate coincides with the axis of the drum, the grinding sandpaper is fixedly installed on the side of the reinforcing plate facing the drum, and the distance between the grinding sandpaper and the drum is the grinding gap.

[0022] The "C"-shaped reinforcement plate is made of a flexible plastic sheet, with a thickness of 2mm-3mm. It helps maintain the sandpaper's "C" shape. The airbag allows for a certain amount of movement during the sanding process when the part moves into the sanding gap. This prevents the part from being completely seated on the receiving platform and becoming stuck in the gap if its height exceeds the gap. The part compresses the sandpaper, causing the airbag to deform slightly, ensuring smooth passage through the gap and further ensuring the stability of the equipment. Furthermore, the airbag allows the sandpaper to deform, better conforming to the part surface, improving the removal of burrs and flash. The reinforcement plate also helps prevent the airbag from being damaged by direct contact with the worn sandpaper, potentially causing scratches and damage.

[0023] Preferably, a guide portion is provided on the upper side of the reinforcing plate, and a trumpet-shaped guide opening is formed between the guide portion and the outer wall of the drum, with the large end of the trumpet-shaped guide opening facing the direction of the die.

[0024] The guide portion guides the part as it enters the grinding gap, preventing it from failing to fully adhere to the receiving platform. This prevents the part from colliding with the end face of the reinforcing plate when its height exceeds the width of the grinding gap, causing it to fall and be unable to enter the grinding gap. When the guide portion is in place, if the part fails to fully adhere to the receiving platform, the bell-shaped shape of the guide portion gradually squeezes and guides the part, allowing it to gradually adhere to the receiving platform, thereby ensuring that the part can smoothly enter the grinding gap. This ensures the stability and effectiveness of the equipment during operation.

[0025] Preferably, four baffles are fixedly installed under the die, and the four baffles are elastic plastic sheets. The upper ends of the four baffles are fixedly installed on the bottom of the die, and the four baffles form a rectangle and completely enclose the cutting edge of the die inside the rectangle, and the lower ends of the four baffles are in contact with the roller.

[0026] The baffle, together with the material, die, and roller, forms a closed space. When the punch stamps the part, the vacuum suction cup can provide stronger suction in this closed space, which can adsorb the part to the receiving platform more quickly, further avoiding the part from getting stuck inside the die and further improving the operating stability of the equipment.

[0027] In addition, improving the suction force of the vacuum suction cup on the parts can help avoid the situation where the parts collide with the receiving platform and become skewed on the receiving platform due to insufficient suction force of the vacuum suction cup.

[0028] Preferably, a mounting shaft is fixedly installed horizontally on the frame, the interior of the drum is hollow to form a cylindrical air cavity coaxial with the drum, the vacuum suction cups are all located on the same vertical plane, the vacuum suction cups are all connected to the air cavity, the drum is rotatably mounted on the mounting shaft in the form of a mechanical seal, a semicircular blocking piece is provided on the mounting shaft, the diameter of the blocking piece is the same as the diameter of the air cavity, the blocking piece is used to cut off the connection between the vacuum suction cup and the air cavity, the blocking piece is tilted and located on the side away from the sandpaper, when the vacuum suction cup rotates to the highest point of the drum, the vacuum suction cup is just completely connected to the air cavity, and when the vacuum suction cup rotates to the lowest point of the drum, the vacuum suction cup is just completely closed by the blocking piece.

[0029] All vacuum cups are connected through an air cavity, providing suction to all of them simultaneously. A blocking piece is then provided to automatically disconnect the vacuum cups from the air cavity when they rotate to the blocking piece. This eliminates the need to individually control the suction of each vacuum cup, reducing control difficulty and significantly reducing control costs.

[0030] Preferably, a card slot is provided between every two material receiving platforms on the roller, and the card slots are all semicircular, and the angle of the central angle between each two card slots is the same as the angle of the stroke angle. A side plate is fixedly installed on the frame on the left side of the roller, and a slide groove is provided on the side plate. A card block matching the card slot is slidably installed inside the slide groove, and a push spring is provided inside the card slot, and the push spring is used to keep the card block pushed out of the slide groove in the direction of the roller. When the card slot is aligned with the card block, the push spring pushes the card block into the inside of the card slot.

[0031] The method of pulling the ratchet by the pawl and then driving the roller to rotate can drive the roller to move intermittently with the punch. However, when the pawl is disengaged from the ratchet, the roller may continue to rotate under the action of inertia. This may cause the receiving platform to not be located exactly under the die, and the part may not be able to fit smoothly with the receiving platform after falling.

[0032] By setting the card slot and the slider, during the rotation of the drum, when the card slot and the slider are aligned, the push spring pushes the slider into the card slot, effectively preventing the drum from rotating at an angle greater than the stroke angle under inertia, further ensuring the stability of the equipment during use. At the same time, when the pawl moves to the bottom of the ratchet, although the pawl can rotate to avoid it, there will still be squeeze contact between the pawl and the ratchet. This may cause the pawl to move to the bottom of the ratchet, causing the ratchet and the drum to rotate counterclockwise in the direction away from the sandpaper, which is not conducive to precise control of the drum's rotation angle. The card slot and the block can be inserted into the card slot to effectively prevent the drum from rotating counterclockwise, thereby ensuring the rotation accuracy of the drum.

[0033] Since the slot is semicircular, the card block is also semicircular and matches the slot. When the ratchet is pulled upward by the pawl to rotate clockwise toward the direction of sandpaper, the card block can be disengaged from the slot without affecting the rotation of the ratchet and the roller.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. Compared to existing stamping machines, the fully automatic sheet metal loading and unloading stamping machine designed in this invention is equipped with a first push rod, a second push rod, and a mechanical clamp, enabling fully automatic operation of the stamping machine from loading to unloading. In addition, a roller and sandpaper are installed below the die. After the stamped parts are received by the material receiving platform on the roller, the roller drives the parts into contact with the sandpaper for polishing. This enables the stamping machine to automatically remove burrs and flash from the stamped parts, further improving the stamping machine's production efficiency.

[0036] 2. The fully automatic sheet metal loading and unloading punching machine designed by the present invention also has a ratchet and a pawl set on the drum. The pawl is connected to the punch through a transmission rod, so that the pawl moves synchronously up and down with the punch. The ratchet is then pulled by the pawl to drive the drum to rotate, so that the drum moves synchronously with the up and down movement of the punch, which not only ensures the movement synchronization of the drum and the punch, but also reduces the control cost of the drum.

[0037] 3. Compared with the existing punching machines, the fully automatic sheet metal loading and unloading punching machine designed by the present invention is also equipped with an airbag. The airbag, combined with the "C"-shaped reinforcement plate, can make the sandpaper fit better with the parts on the roller, thereby improving the grinding effect of burrs and flash on the parts. In addition, the setting of the airbag can also prevent the parts from getting stuck in the grinding gap when grinding, thereby improving the stability of the equipment during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0039] Figure 2 It is a front view of the present invention;

[0040] Figure 3 It is a right side view of the present invention;

[0041] Figure 4 For the present invention Figure 2 Enlarged view of point A in the middle;

[0042] Figure 5 This is a schematic diagram of the state when the pawl moves upward and just contacts the ratchet wheel in the present invention;

[0043] Figure 6 Schematic diagram of the internal structure of the drum in the present invention;

[0044] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle;

[0045] Figure 8 For the present invention Figure 6 Enlarged view of point C in the middle;

[0046] Figure 9 For the present invention Figure 6 Enlarged view of point D in the middle;

[0047] Figure 10 It is a schematic diagram of the three-dimensional structure of the drum installed on the installation shaft in the present invention.

[0048] In the figure: 1. Frame; 2. Mounting plate; 3. Punch; 4. First drive assembly; 5. Die; 6. Loading platform; 7. First push rod; 8. Storage platform; 9. Grabbing assembly; 10. Unloading platform; 11. Roller; 12. Receiving platform; 13. Stroke angle; 14. Grinding sandpaper; 15. Transmission rod; 16. Ratchet; 17. Pawl; 18. Vacuum suction cup; 19. Vertical plate; 20. Air bag; 21. Reinforcement plate; 22. Grinding gap; 23. Guide part; 24. Guide port; 25. Baffle; 26. Mounting shaft; 27. Air cavity; 28. Blocking plate; 29. ​​Slot; 30. Side plate; 31. Slide; 32. Block; 33. Push spring; 34. Material; 35. Second push rod; 36. Waste material; 37. Collection trough. DETAILED DESCRIPTION

[0049] See also Figures 1 to 10 The present invention provides a fully automatic sheet metal loading and unloading punching machine, the technical solution is as follows:

[0050] A fully automatic sheet metal loading and unloading punching machine, reference Figures 1 to 3, including a frame 1, a mounting plate 2 is provided on the frame 1, and a punch 3 is fixedly installed under the mounting plate 2. In this embodiment, the production of long strip plate parts with a length of 60 mm, a width of 20 mm and a thickness of 4 mm is taken as an example. Therefore, the length of the punch 3 is 60 mm and the width is 20 mm. The material 34 is an aluminum alloy plate with a width of 100 mm, a length of 400 mm and a thickness of 4 mm. The frame 1 is also provided with a first drive component 4 for driving the mounting plate 2 to move up and down. The first drive component 4 uses a flywheel and a motor combination to drive the mounting plate 2 to move back and forth up and down. A hydraulic rod can also be used to drive the mounting plate 2 to move up and down to achieve the stamping effect, but the speed at which the hydraulic rod drives the mounting plate 2 to move is slow. In addition, the first drive component 4 can also be a cylinder or other mechanism or device that can drive the mounting plate 2 to move back and forth up and down.

[0051] refer to Figure 1 、 Figure 3 and Figure 6 A die 5 adapted to the punch 3 is fixedly mounted on the frame 1. The die 5 is located directly below the punch 3. The cutting edge of the die 5 is also 60 mm long and 20 mm wide, and the length and width of the die 5 are vertically aligned with the length and width of the punch 3, respectively. A loading platform 6 is provided on the right side of the frame 1. A first push rod 7 is provided on the loading platform 6. The first push rod 7 is used to push the material 34 horizontally toward the die 5. A storage platform 8 is provided in front of the loading platform 6. The storage platform 8 is used to store the material 34. A grabbing assembly 9 is provided on the storage platform 8 for grabbing the material 34 on the storage platform 8 and placing it on the loading platform 6. The grabbing assembly 9 can use a robotic arm to grab the material 34. In this embodiment, the grabbing assembly 9 adopts two electric guide rails installed vertically on the gantry, and then an electric guide rail is installed horizontally on the sliders of the two electric guide rails. The sliders of the horizontally installed electric guide rails are set downward, and then a suction cup is fixedly installed under the slider of the horizontal electric guide rail. The suction cup is used to grab the material 34 to the specified position. The suction cup can be connected to an external vacuum mechanism, such as a vacuum generator, to control the suction cup to grab and release the material 34.

[0052] refer to Figure 1 A feeding platform 10 for storing waste 36 is provided on the left side of the frame 1. The feeding platform 10 is located at the lower left side of the frame 1. A second push rod 35 for pushing the waste 36 toward the feeding platform 10 is also provided on the left side of the frame 1.

[0053] refer to Figure 2 as well as Figures 6 to 10A mounting shaft 26 is fixedly mounted horizontally on the frame 1. The mounting shaft 26 is located directly below the die 5, and the axis of the mounting shaft 26 is perpendicular to the front of the frame 1. A roller 11 is also provided on the frame 1. The interior of the roller 11 is hollow and forms a cylindrical air cavity 27 coaxial with the roller 11. The roller 11 is coaxially mounted on the mounting shaft 26. The roller 11 and the mounting shaft 26 are connected in a rotational manner using a mechanical seal to ensure the airtightness of the air cavity 27. The roller 11 is connected to an external vacuum component to provide negative pressure for the air cavity 27. The vacuum component can be a vacuum generator. A rotary joint is used at the connection between the roller 11 and the vacuum generator to prevent the pipeline from interfering with the rotation of the roller 11. Eight material receiving platforms 12 are provided on the roller 11. The material receiving platforms 12 are recessed on the outer wall of the roller 11. The length of the material receiving platforms 12 is 80 mm and the width is 40 mm. When the material receiving platform 12 is opened, it is necessary to ensure that there are side walls on all sides. Because the outer wall of the drum 11 is arc-shaped, the side walls of the material receiving platform 12 should be at least 1 mm higher than the lowest point of the material receiving platform 12. In this embodiment, the height of the side walls at the long side of the material receiving platform 12 is set to 1 mm. The length and width directions of the material receiving platform 12 are the same as the length and width directions of the die 5. The eight material receiving platforms 12 are evenly distributed on the drum 11 with the axis of the drum 11 as the reference circumference. The central angle of the midpoint of two adjacent material receiving platforms 12 on the cross section of the drum 11 is the stroke angle 13. In this embodiment, since eight material receiving platforms 12 are set, the stroke angle 13 is 45°. A collecting trough 37 is provided directly below the drum 11.

[0054] refer to Figure 6 and Figure 7 Four baffles 25 are fixedly installed under the die 5. The four baffles 25 are elastic plastic sheets. The upper ends of the four baffles 25 are fixedly installed on the bottom of the die 5. The four baffles 25 form a rectangle and completely surround the cutting edge of the die 5 inside the rectangle. The lower ends of the four baffles 25 are all in contact with the roller 11. Among them, the rectangle formed by the four baffles 25 is 80mm long and 40mm wide, which is the same as the length and width of the material receiving platform 12. When the material receiving platform 12 rotates to the horizontal position, the four baffles 25 coincide with the four sides of the material receiving platform 12.

[0055] refer to Figure 6 、 Figure 7 and Figure 9A vertical plate 19 is fixedly mounted on the right side of the drum 11. An airbag 20 is fixedly mounted on the vertical plate 19 and positioned between the drum 11 and the vertical plate 19. A C-shaped reinforcing plate 21 is fixedly mounted on the side of the airbag 20 facing the drum 11. The reinforcing plate 21 is a thin plastic plate with a thickness of 2mm-3mm. The axis of the C-shaped reinforcing plate 21 coincides with the axis of the drum 11. Sandpaper 14 is fixedly mounted on the side of the reinforcing plate 21 facing the drum 11. Sandpaper 14 is used to remove burrs and flash from parts. The distance between the sandpaper 14 and the drum 11 is a sanding gap 22. In this embodiment, the sanding gap 22 is set to 2.5mm. A guide portion 23 is provided on the upper side of the reinforcing plate 21. A trumpet-shaped guide opening 24 is formed between the guide portion 23 and the outer wall of the drum 11, with the larger end of the trumpet-shaped guide opening 24 facing toward the die 5.

[0056] In addition, reference Figure 6 and Figure 8 , a card slot 29 is provided between every two material receiving platforms 12 on the roller 11, and the card slots 29 are all semicircular. The angle of the central angle between every two card slots 29 is the same as the angle of the stroke angle 13. A side plate 30 is fixedly installed on the frame 1 on the left side of the roller 11, and a slide groove 31 is opened on the side plate 30. A card block 32 matching the card slot 29 is slidably installed inside the slide groove 31, and a push spring 33 is provided inside the card slot 29. The push spring 33 is used to keep the card block 32 pushed out of the slide groove 31 toward the direction of the roller 11. When the card slot 29 is aligned with the card block 32, the push spring 33 pushes the card block 32 to be stuck in the inside of the card slot 29.

[0057] refer to Figures 6 to 9 Each mounting plate 2 is provided with a fixing assembly, each including a vacuum suction cup 18 mounted on the receiving platform 12. Each vacuum suction cup 18 is connected to the air cavity 27. A semicircular blocking piece 28 is also fixedly mounted on the mounting shaft 26. The diameter of the blocking piece 28 is the same as that of the air cavity 27. The blocking piece 28 is used to isolate the connection between the vacuum suction cup 18 and the air cavity 27. The blocking piece 28 is arranged at an angle and is located on the side away from the sandpaper 14. When the vacuum suction cup 18 rotates to the highest point of the drum 11, the vacuum suction cup 18 is completely connected to the air cavity 27. When the vacuum suction cup 18 rotates to the lowest point of the drum 11, the vacuum suction cup 18 is completely blocked by the blocking piece 28.

[0058] refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 as well as Figure 6The frame 1 is also provided with a second drive assembly for rotating the roller 11. The second drive assembly includes a transmission rod 15, which is vertically arranged and fixedly connected to the mounting plate 2 and can move up and down with the punch 3. A ratchet 16 is fixedly mounted on the end of the roller 11. A pawl 17 is rotatably mounted on the lower end of the transmission rod 15, which cooperates with the ratchet 16. The pawl 17 is arc-shaped and can swing up and down along a vertical plane. When set up, without considering inertia, when the pawl 17 moves upward with the punch 3, the rotation angle of the pawl 17 from the moment it contacts the ratchet 16 to the moment the pawl 17 completely disengages from the ratchet 16 is the same as the stroke angle 13.

[0059] In the initial state, refer to Figure 6 、 Figure 7 One of the receiving platforms 12 on the drum 11 is located at the top of the drum 11 and directly below the die 5. The receiving platform 12 is parallel to the upper surface of the die 5, and the four edges of the receiving platform 12 overlap with the four baffles 25. The external vacuum assembly continues to evacuate the air cavity 27 to keep the air pressure inside the air cavity 27 lower than the air pressure outside the drum 11. At this time, the clamping block 32 is pushed into the clamping slot 29 by the spring.

[0060] During use, the materials 34 are neatly stacked and placed on the storage table 8, and then the suction cup on the grabbing component 9 is moved to just above the stacked materials 34, and then the suction cup on the grabbing component 9 moves downward toward the materials 34. When the suction cup moves downward until it contacts the materials 34, the suction cup stops moving downward, and the suction cup is turned into negative pressure through an external vacuum generator, so that the suction cup on the grabbing component 9 can firmly adsorb the materials 34, and then the grabbing component 9 controls the movement of the suction cup through the electric guide rail, and drives the suction cup and the materials 34 to the front of the first push rod 7, so that the first push rod 7, the materials 34 and the die 5 are located on the same horizontal straight line, and finally the suction cup moves downward to place the materials 34 on the loading platform 6 just in front of the push rod, and then the grabbing component 9 is reset.

[0061] Next, the first push rod 7 begins to push the material 34 horizontally toward the die 5. When the material 34 completely covers the cutting edge of the die 5 and the front end of the material 34 exceeds the cutting edge of the die 5 by 10 mm, the first push rod 7 stops. The first drive assembly 4 then drives the mounting plate 2 and the punch 3 downward. The punch 3 cooperates with the cutting edge of the die 5 to cut the material 34 into a long, plate-like part with a length of 60 mm, a width of 20 mm, and a thickness of 4 mm.

[0062] As the punch 3 moves downward, it moves downward along with the pawl 17 driven by the transmission rod 15. The pawl 17 remains perpendicular to the transmission rod 15 due to its own weight. When the pawl 17 contacts the teeth of the ratchet wheel 16 during its downward movement, it rotates upward under the pressure of the teeth. After the pawl 17 passes over the teeth, it returns to its perpendicular position relative to the transmission rod 15 due to its own weight. When the punch 3 reaches its lowest point, it cooperates with the die 5 to complete the stamping of the part. At this point, the pawl 17 has also passed over the teeth of the ratchet wheel 16 and moved below them.

[0063] After the parts are separated from the material 34 , the material 34 quickly falls onto the vacuum suction cup 18 under its own gravity and the suction force of the vacuum suction cup 18 on the material receiving platform 12 , and is adsorbed and fixed on the material receiving platform 12 by the vacuum suction cup 18 .

[0064] Then, refer to Figures 4 to 9 , the first drive assembly 4 drives the punch 3 to move upward, and the pawl 17 also moves upward with the punch 3. When the pawl 17 contacts the ratchet teeth on the ratchet 16, the pawl 17 pulls the ratchet teeth of the ratchet 16 upward and applies a torque to the ratchet 16. The pawl 17 begins to drive the ratchet 16 to rotate clockwise in the direction of the sandpaper 14. Because the ratchet 16 is fixedly connected to the roller 11, the roller 11 and the parts on the roller 11 are also driven to rotate in the direction of the sandpaper 14. At the same time, when the pawl 17 pulls the ratchet 16, the semicircular block 32 with a front end will disengage from the slot 29 under the pressure of the arc-shaped slot 29, and the block 32 no longer restricts the rotation of the roller 11. When the pawl 17 disengages from the ratchet teeth of the ratchet 16, the ratchet 16 just rotates a stroke angle 13, that is, the ratchet 16 and the roller 11 just rotate 45°. At this time, the first part has entered the grinding gap 22 under the guidance of the guide part 23 following the rotation of the roller 11. At this time, the block 32 is also smoothly stuck into the inside of the next slot 29 under the elastic force of the push spring 33, preventing the roller 11 from continuing to rotate under the action of inertia. It should be noted here that because the slots 29 and the material receiving platform 12 are arranged at intervals, the block 32 needs to pass through a material receiving platform 12 in the process from aligning with one slot 29 to aligning with the next slot 29 after the roller 11 rotates. Since the material receiving platform 12 is concave, the block 32 will first be stuck into the inside of the material receiving platform 12, and then leave the material receiving platform 12 under the guidance of its own semicircular front end. Furthermore, since the pawl 17 continuously applies a torque to the ratchet 16 driven by the first drive assembly 4 during the process of the pawl 17 pulling the ratchet 16 to rotate until the pawl 17 is completely disengaged from the ratchet 16, the situation in which the roller 11 cannot rotate due to the block 32 being inserted into the material receiving platform 12 will not occur.

[0065] When the pawl 17 and the ratchet wheel 16 are completely disengaged, refer to Figure 2 as well as Figures 4 to 9 , the next material receiving platform 12 that is not loaded with parts will move to the bottom of the die 5, and the bottom of the die 5 will be parallel to the surface of the die 5. Then the first push rod 7 will push the material 34 horizontally for 30 mm in the direction of the die 5, and then the first push rod 7 will stop. The first drive assembly 4 will drive the punch 3 to move downward again, and the punch 3 will cooperate with the cutting edge of the die 5 to punch and cut the material 34 out of the parts again. The parts will eventually fall onto the material receiving platform 12 and be adsorbed and fixed on the material receiving platform 12 by the vacuum suction cup 18. When the punch 3 moves upward to reset, the pawl 17 will drive the ratchet 16 and the roller 11 to rotate clockwise toward the sandpaper 14 again. Both cut plate-like parts are transported in the direction of the sandpaper 14. Previously, the first part had already entered the grinding gap 22. After the second part was fixed to the receiving platform 12, when the drum 11 rotated again, the first part would follow the drum 11 and rotate in the grinding gap 22. When the part rotated in the grinding gap 22, the edge of the upper surface of the part would constantly rub against the grinding sandpaper 14, and the grinding sandpaper 14 would be able to grind away the burrs and burrs on the part. Moreover, due to the provision of the airbag 20, the airbag 20 can deform to a certain extent when under pressure, which enables the grinding sandpaper 14 to better contact the top surface of the part, grinding away the burrs and burrs of the part as much as possible, thereby improving the grinding effect. In addition, the provision of the airbag 20 can also prevent the part from getting stuck in the grinding gap 22 by deforming the airbag 20, thereby ensuring the stability of the equipment during use.

[0066] As the punch 3 and the die 5 continue to punch out parts, refer to Figure 2 、 Figure 6 and Figure 9 The stamped parts continuously fall onto the receiving platform 12 and rotate with the roller 11 into the grinding gap 22 where they are polished by the sandpaper 14. When the receiving platform 12 leaves the grinding gap 22 with the parts, the polishing of the parts is complete. As the receiving platform 12 continues to rotate with the polished parts to the point directly below the roller 11, the vacuum suction cup 18 on the receiving platform 12 located directly below the roller 11 is isolated from the air cavity 27 by the blocking piece 28. At this point, the vacuum suction cup 18 becomes ineffective, and the polished parts fall into the collection tank 37 under the action of their own gravity and are collected.

[0067] refer to Figures 6 to 9Since the blocking piece 28 is semicircular, the material receiving platform 12 does not participate in the load-bearing effect on the parts during the journey before the vacuum suction cup 18 moves from the lowest point of the roller 11 to the highest point of the roller 11. Therefore, this section will completely cut off the connection between the vacuum suction cup 18 and the air cavity 27 to ensure the suction force of the vacuum suction cup 18 on the remaining material receiving platform 12 that actually carries the parts.

[0068] refer to Figure 1 As the punch 3 continuously punches and separates the parts from the material 34, when the material 34 can no longer be used, the material 34 is discarded and becomes waste 36. The first push rod 7 continues to push the waste 36 toward the die 5 until it is pushed away from the die 5. At this time, the waste 36 comes to the frame 1 on the left side of the die 5. At this time, the second push rod 35 pushes the material 34 forward, causing the material 34 to fall onto the unloading platform 10 and stack up.

[0069] Continuous production can be achieved by simply repeating the above steps. When determining whether the material 34 has become waste 36, a camera visual detection method can be used for determination, or the length of the material 34 and the number of punching times can be used to determine whether the material 34 is still usable.

[0070] It should be noted that the reference Figures 6 to 9 Before all the vacuum cups 18 that are in communication with the air cavity 27 adsorb and secure the parts to the corresponding receiving platform 12, the negative pressure inside the air cavity 27 may not provide sufficient suction to secure the parts due to the air connection between the vacuum cups 18 and the air outside the drum 11. However, before the parts follow the receiving platform 12 into the grinding gap 22, when passing through the guide portion 23, the guide portion 23 will guide and flatten the parts onto the receiving platform 12. After entering the grinding gap 22, due to the resistance of the sandpaper 14, the parts that are not fully secured may be displaced relative to the drum 11 due to the friction of the sandpaper 14. That is, when the drum 11 rotates clockwise, the parts rotate counterclockwise relative to the drum 11. When the side wall of the part contacts the side wall of the receiving platform 12, the receiving platform 12 can give the part a thrust, driving the part to continue moving along the grinding gap 22. There is no need to worry about the part getting stuck in the grinding gap 22.

[0071] Moreover, reference Figure 6The above situation will not last long. Before the first part leaves the grinding gap 22, all the vacuum suction cups 18 that are connected to the air cavity 27 on the receiving platform 12 will be able to ensure that all parts are loaded. At this time, due to the shielding of the vacuum suction cups 18 by the parts and the blocking of the vacuum suction cups 18 by the blocking pieces 28, the air cavity 27 is no longer connected to the external air. The air pressure inside the air cavity 27 will be able to remain stable, providing sufficient suction force for subsequent parts, firmly fixing the parts on the receiving platform 12, and ensuring stable operation of the equipment.

[0072] A specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiment described above. For those skilled in the art, various changes, modifications, substitutions, and variations to these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A fully automatic sheet metal loading and unloading punching machine, comprising a frame (1), a mounting plate (2) being provided on the frame (1), a punch (3) being provided below the mounting plate (2), a first driving assembly (4) being provided on the frame (1) for driving the mounting plate (2) to move up and down, a die (5) being provided on the frame (1), a loading platform (6) being provided on the right side of the frame (1), a first push rod (7) being provided on the loading platform (6), a material storage platform (8) being provided in front of the loading platform (6), a grabbing assembly (9) being provided on the material storage platform (8), and a material unloading platform (10) being provided on the left side of the frame (1), characterized in that: A roller (11) is also horizontally mounted on the frame (1), and the roller (11) is located directly below the die (5). A plurality of material receiving platforms (12) are provided on the roller (11), and the central angle between two adjacent material receiving platforms is a stroke angle (13). A second driving assembly for driving the roller (11) to rotate is provided on the frame (1), and the second driving assembly includes a transmission rod (15), which is vertically arranged and fixedly connected to the mounting plate (2) so as to be able to move up and down with the punch (3). A ratchet (16) is fixedly mounted on the end of the roller (11), and the lower end of the transmission rod (15) is rotated and mounted. A pawl (17) is provided to cooperate with the ratchet (16), and the pawl (17) can swing up and down along a vertical plane. When the transmission rod (15) follows the mounting plate (2) to move up and down for one cycle, the pawl (17) hooks the ratchet (16) and drives the ratchet (16) to rotate, and the angle of rotation of the ratchet (16) is the same as the stroke angle (13). Each mounting plate (2) is provided with a fixing component, and the fixing component is used to fix the parts dropped from the die (5) on the mounting plate (2). A grinding sandpaper (14) is provided on the right side of the roller (11), and a collecting tank (37) is provided just below the roller (11). The roller (11) is provided with a collecting tank (37) toward the grinding sandpaper. When the sandpaper (14) rotates in the direction of rotation, the sandpaper (14) contacts the part and grinds the burrs on the part. Four baffles (25) are fixedly installed under the die (5). The four baffles (25) are elastic plastic sheets. The upper ends of the four baffles (25) are fixedly installed on the bottom of the die (5). The four baffles (25) form a rectangle and completely surround the cutting edge of the die (5) inside the rectangle. The lower ends of the four baffles (25) are all in contact with the roller (11). A slot (29) is provided between each two receiving platforms (12) on the roller (11). The slots (29) are semicircular. The angles of the central angles between the grooves (29) are all the same as the angles of the stroke angles (13). A side plate (30) is fixedly mounted on the frame (1) on the left side of the roller (11). A slide groove (31) is provided on the side plate (30). A block (32) matching the slot (29) is slidably mounted inside the slide groove (31). A push spring (33) is provided inside the slot (29). The push spring (33) is used to keep the block (32) pushed out of the slide groove (31) in the direction of the roller (11). When the slot (29) is aligned with the block (32), the push spring (33) pushes the block (32) to be stuck inside the slot (29).

2. The fully automatic sheet metal loading and unloading punching machine according to claim 1, characterized in that: The fixing component comprises a vacuum suction cup (18) mounted on the material receiving platform (12), and the vacuum suction cup (18) is connected to an external air extraction component for providing negative pressure to the vacuum suction cup (18).

3. The fully automatic sheet metal loading and unloading punching machine according to claim 1, characterized in that: A vertical plate (19) is fixedly mounted on the right side of the roller (11), and an airbag (20) is fixedly mounted on the vertical plate (19). The airbag (20) is located between the roller (11) and the vertical plate (19). A "C"-shaped reinforcing plate (21) is fixedly mounted on the side of the airbag (20) facing the roller (11). The axis of the "C"-shaped reinforcing plate (21) coincides with the axis of the roller (11). The grinding sandpaper (14) is fixedly mounted on the side of the reinforcing plate (21) facing the roller (11). The distance between the grinding sandpaper (14) and the roller (11) is a grinding gap (22).

4. The fully automatic sheet metal loading and unloading punching machine according to claim 3, characterized in that: A guide portion (23) is provided on the upper side of the reinforcing plate (21), and a trumpet-shaped guide opening (24) is formed between the guide portion (23) and the outer wall of the roller (11), with the large end of the trumpet-shaped guide opening (24) facing the direction of the die (5).

5. The fully automatic sheet metal loading and unloading punching machine according to claim 2, characterized in that: The frame (1) is fixedly mounted with a mounting shaft (26) in a horizontal position. The interior of the roller (11) is hollow to form a cylindrical air cavity (27) coaxial with the roller (11). The vacuum suction cups (18) are all located on the same vertical plane. The vacuum suction cups (18) are all connected to the air cavity (27). The roller (11) is rotatably mounted on the mounting shaft (26) in the form of a mechanical seal. A semicircular blocking piece (28) is provided on the mounting shaft (26). The diameter of the blocking piece (28) is the same as that of the air cavity. (27) have the same diameter, the blocking piece (28) is used to block the communication between the vacuum suction cup (18) and the air cavity (27), the blocking piece (28) is tilted and located on the side away from the sandpaper (14), when the vacuum suction cup (18) rotates to the highest point of the roller (11), the vacuum suction cup (18) is just completely connected with the air cavity (27), and when the vacuum suction cup (18) rotates to the lowest point of the roller (11), the vacuum suction cup (18) is just completely closed by the blocking piece (28).

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