Full-automatic metal plate feeding and discharging punching machine

Abstract

The invention relates to the technical field of punching machines, in particular to a full-automatic metal plate feeding and discharging punching machine which comprises a rack, a mounting plate is arranged on the rack, a male die is arranged below the mounting plate, a first driving assembly is arranged on the rack, a female die is mounted on the rack, a feeding platform is arranged on the right side of the rack, and a first push rod is arranged on the feeding platform. A grabbing assembly is arranged on the material storage table, a discharging platform is arranged on the left side of the rack, a roller is further horizontally installed on the rack, a plurality of material receiving platforms are arranged on the roller, a second driving assembly is arranged on the rack, and polishing abrasive paper is arranged on the right side of the roller. And when the roller rotates in the direction of the polishing abrasive paper, the polishing abrasive paper makes contact with the part and conducts burr polishing on the part. Through the arrangement of the roller, after the material receiving platform receives a punched part, the roller drives the part to be in contact with the polishing abrasive paper for polishing, so that the punching machine automatically removes burrs and flashes on the part, and the production efficiency of the punching machine is improved.

Description

Technical Field

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

[0002] Stamping, as a forming processing method, is to apply external force to plates, strips, tubes, profiles, etc. with the help of a press and a die, so that they undergo plastic deformation or separation, and then obtain workpieces with the required shape and size. In the field of sheet metal cutting processing, stamping machines have become commonly used processing equipment due to their significant advantages of high efficiency and low processing cost.

[0003] In the production and processing process of unmanned aerial vehicles (UAVs), stamping machines are used in the processing of many sheet metal parts. For example, the fuselage frame, partition board, battery mounting board, etc. of UAVs, which are plate-shaped support members that need to be designed in specific shapes, all need to be manufactured by stamping and cutting with a stamping machine.

[0004] During stamping and cutting, the punch of the stamping machine moves towards the die, extruding and breaking the sheet metal from the die, so as to obtain a plate-shaped part that conforms to the shape of the die. However, during the sheet metal cutting process, in fact, the sheet metal is pulled and broken, which results in burrs and flash on the edge of the cut plate-shaped part. If t is used as the standard of the material thickness, the height of these burrs and flash is approximately between 5%t - 10%t. To ensure the normal use of the parts in the follow-up, these burrs and flash must be removed by grinding after stamping.

[0005] In the early days, traditional stamping machines had relatively single functions and generally only had the stamping function. The loading and unloading operations usually relied on manual labor. With the progress of the times, now many stamping machines are already equipped with automatic loading and unloading functions. However, unfortunately, they still do not have the function of grinding the burrs and flash of the parts. Therefore, after unloading, it is still necessary to use sandpaper or grinding equipment to remove the burrs and flash of the stamping parts, which is undoubtedly not conducive to the continuous processing of the parts and results in low production efficiency of the parts.

[0006] Especially for small UAVs, in order to reduce weight, the sheet metal used is usually relatively thin. It is difficult to grind such thin sheet metal with equipment, and often only manual sandpaper can be used to remove burrs and flash. However, due to the thinness of the parts, they are extremely easy to bend and deform during the manual grinding process, and finally lead to difficulties in installation when the parts are actually used.

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

[0008] Therefore, a fully automatic sheet metal loading and unloading stamping 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 stamping machine, which solves the problem that the stamping machine cannot automatically remove burrs and flash from the stamped parts after stamping the plate-shaped parts as mentioned in the above background art.

[0010] To achieve the above purpose, the present invention provides the following technical solutions: A fully automatic sheet metal loading and unloading stamping machine includes a frame. An installation plate is arranged on the frame. A punch is arranged below the installation plate. The frame is also provided with a first driving component for driving the installation plate to move up and down. A die matching the punch is fixedly installed on the frame. The die is located directly below the punch. A loading platform is arranged on the right side of the frame. A first push rod is arranged on the loading platform. The first push rod is used to horizontally push the material towards the die. A storage table is arranged in front of the loading platform. The storage table is used to store materials. A grasping component is arranged on the storage table. The grasping component is used to grasp the materials on the storage table and place them on the loading platform. A blanking platform for storing waste materials is arranged on the left side of the frame. A roller is also horizontally installed on the frame. The roller is located directly below the die. A plurality of material receiving platforms are arranged on the roller. The central angle between adjacent two material receiving platforms is a stroke angle. The plurality of material receiving platforms are circumferentially and evenly distributed on the roller with the axis of the roller as the reference. The frame is provided with a second driving component for driving the roller to rotate. A fixing component is arranged on each installation plate. The fixing component is used to fix the parts falling from the die on the installation plate. A grinding sandpaper is arranged on the right side of the roller. A collection tank is arranged directly below the roller.

[0011] The material is clamped and placed on the loading platform by a mechanical gripper. The first push rod on the loading platform horizontally pushes the material towards the die. The punch moves towards the die driven by the first driving component. The punch impacts the material towards the die. The punch cooperates with the cutting edge of the die to punch and cut out a plate-shaped part with the same shape as the die from the material. Subsequently, the first driving component drives the punch to move upward and reset. The first push rod horizontally pushes the material towards the die again, aligning the unpunched part of the material with the die. In this way, continuous stamping processing of the parts is realized repeatedly. When a complete part cannot be stamped out at the position on the material, the material has become waste. The push rod continues to push the waste towards the die until it leaves the die and is pushed to the blanking platform. When the waste is pushed to the blanking platform, it is pushed off the blanking platform and stacked by a second push rod, realizing automatic collection of the waste.

[0012] The punched parts fall down from the die onto the drum, and the drum can be driven to rotate by the second drive assembly, so that the drum rotates in the direction of the sandpaper when the punch is reset, and the receiving platform is on the same vertical line with the punch and the die when the punch is reset. In this way, when the punch punches out the parts downward, the parts can fall on the receiving platform. After the parts fall on the receiving platform, the fixing assembly fixes the parts on the receiving platform, and then when the punch is reset, the second drive assembly drives the drum to rotate a stroke angle in the direction of the sandpaper, so that the next receiving platform is on the same vertical line with the die and the punch. The receiving platform with the parts fixed drives the parts to rotate in the direction of the sandpaper and makes the parts contact with the sandpaper. In this way, as the production of parts continues, the drum rotates with the parts that fall on the receiving platform, so that the parts can continuously contact with the sandpaper and cause relative displacement, so that the sandpaper can grind off the burrs and flash on the parts. When the drum rotates with the parts to the bottom of the drum, the fixing assembly releases the parts, and the parts fall into the collection tank below and are automatically collected. In this way, the punching machine can remove the burrs and flash of plate parts while automatically loading and unloading. This saves the process of transferring the parts to the grinding equipment for burr and flash removal, effectively saving production time and improving production efficiency.

[0013] It should be noted that, during the stamping process, when the parts are separated from the material, the parts are facing downward while the material is not moving, 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 up. 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, the sandpaper can effectively grind the burrs.

[0014] Preferably, the second driving assembly includes a transmission rod, which is vertically arranged and fixedly connected to the mounting plate so as to be able to move up and down with the punch. A ratchet is fixedly mounted on the end of the roller, and a pawl matching the ratchet is rotatably mounted 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 rotation angle of the ratchet is the same as the stroke angle.

[0015] The ratchet and the pawl cooperate. When the pawl moves downward following the punch, the pawl can rotate and avoid by squeezing with the ratchet, so that the pawl can cross over the ratchet and reach below the ratchet. When the pawl follows the punch to reset upward, the pawl hooks the ratchet teeth on the ratchet, and can drive the ratchet to rotate in the direction of the grinding sandpaper. Through the design, when the pawl hooks the ratchet and moves upward from bottom to top until the pawl is disengaged from the ratchet, the rotation angle of the ratchet is just the same as the angle of the stroke angle, which can realize the intermittent rotation of the drum. And after each rotation is completed, there is a material receiving platform directly below the female die to ensure that the parts punched out each time can fall onto the material receiving platform. Controlling the rotation of the drum by the ratchet and the pawl, compared with controlling the rotation of the drum by a motor, not only improves the motion synchronization between the drum and the punch, but also reduces the production cost of the equipment and the costs required for control and maintenance.

[0016] Preferably, the fixing assembly includes vacuum suction cups fixedly installed on each material receiving platform, and the vacuum suction cups are all connected to an external air extraction assembly to provide negative pressure for the vacuum suction cups.

[0017] The parts processed by stamping are adsorbed on the material receiving platform by the vacuum suction cups, avoiding the parts from detaching from the material receiving platform during the grinding process and ensuring the grinding effect of the burrs and flash on the parts. Using the vacuum suction cups to fix the parts on the material receiving platform has the advantages of simple structure and small volume, will not affect the top surface of the parts far from the drum, avoid affecting the contact between the parts and the grinding sandpaper, and ensure the grinding effect. In addition, through the suction force of the vacuum suction cups, the parts can also be adsorbed towards the material receiving platform, avoiding the situation where the parts are stuck at the female die and cannot fall onto the material receiving platform, thereby improving the stability during the use of the equipment.

[0018] Adsorbing and fixing the parts to the material receiving platform with vacuum suction cups can effectively avoid the situation that the parts with relatively thin thickness are bent during the grinding process and avoid damage to the parts.

[0019] Although the way of the fixing assembly using magnetic attraction is basically the same as the way of using vacuum suction cups, due to the need to ensure the strength and light weight of the unmanned aerial vehicle, the parts used in the unmanned aerial vehicle are usually made of aluminum alloy, titanium alloy or plastic, and cannot be fixed by magnetic force. The way of adsorbing and fixing with vacuum suction cups can make the equipment applicable to more occasions and improve the applicability of the equipment.

[0020] 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, and 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.

[0021] The "C"-shaped reinforcing plate is made of a plastic sheet that can be bent and deformed. The thickness of the reinforcing plate can be selected from 2 mm to 3 mm, and it is used to shape the grinding sandpaper into a "C" shape. The airbag enables the grinding sandpaper to have a certain amount of movement during the contact grinding process between the part and the sandpaper when the part moves into the grinding gap, avoiding the situation where the part fails to fully fit the feeding platform and gets stuck inside the grinding gap when the height of the part exceeds the width of the grinding gap. The part can squeeze the grinding sandpaper, causing the airbag to undergo a certain amount of squeezing deformation to ensure that the part can pass through the grinding gap smoothly, further ensuring the stability of the equipment operation. In addition, the setting of the airbag enables the grinding sandpaper to deform to better fit the surface of the part, improving the grinding effect on burrs and flash on the part. Moreover, the reinforcing plate helps prevent the situation where the airbag is punctured when the part directly contacts the airbag after the grinding sandpaper wears, avoiding damage to the airbag.

[0022] Preferably, a guiding portion is provided on the upper side of the reinforcing plate. A trumpet-shaped guiding opening is formed between the guiding portion and the outer wall of the roller, and the large end of the trumpet-shaped guiding opening faces the direction of the female die.

[0023] The setting of the guiding portion can guide the part into the grinding gap, avoiding the situation where the part fails to fully fit the feeding platform and collides with the end face of the reinforcing plate, causing the part to fall and unable to enter the grinding gap when the height of the part exceeds the width of the grinding gap. After the guiding portion is set, when the part fails to fully fit the feeding platform, the part is gradually squeezed and guided through the shape of the trumpet opening of the guiding portion, enabling the part to gradually fit the feeding platform, and thus ensuring that the part can smoothly enter the grinding gap. This ensures the stability and usage effect during the equipment operation.

[0024] Preferably, four retaining pieces are fixedly installed below the female die. The four retaining pieces are all elastic plastic sheets. The upper ends of the four retaining pieces are fixedly installed at the bottom of the female die. The four retaining pieces enclose a rectangle and completely enclose the cutting edge of the female die inside the rectangle. The lower ends of the four retaining pieces all abut against the roller.

[0025] The retaining pieces cooperate with the material, the female die, and the roller to enclose a closed space. When the male die punches the part into shape, the suction force provided by the vacuum chuck in this closed space will be stronger, enabling the part to be adsorbed onto the feeding platform faster, further avoiding the situation where the part gets stuck inside the female die, and further improving the operation stability of the equipment.

[0026] In addition, increasing the suction force of the vacuum chuck on the part helps avoid the situation where the part skews on the feeding platform due to insufficient suction force of the vacuum chuck after the part collides with the feeding platform.

[0027] Preferably, a mounting shaft is horizontally and fixedly installed on the frame. The inside of the roller is hollow to form a cylindrical air cavity coaxial with the roller. The vacuum suction cups are all located in the same vertical plane and are all communicated with the air cavity. The roller is rotationally installed on the mounting shaft in a mechanical seal manner. A semi-circular blocking piece is arranged 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 communication between the vacuum suction cups and the air cavity. The blocking piece is inclined and located on the side away from the abrasive paper. When the vacuum suction cup rotates to the highest point of the roller, the vacuum suction cup is just completely communicated with the air cavity. When the vacuum suction cup rotates to the lowest point of the roller, the vacuum suction cup is just completely blocked by the blocking piece.

[0028] All the vacuum suction cups are connected through the air cavity to provide suction for all the vacuum suction cups simultaneously at one time. By arranging the blocking piece, the vacuum suction cup is cut off from the air cavity after rotating to the position of the blocking piece, realizing the automatic interruption of the suction of the vacuum suction cup. In this way, it is not necessary to control the suction of each vacuum suction cup separately, reducing the control difficulty of the vacuum suction cup and effectively saving the control cost.

[0029] Preferably, a card slot is arranged between every two material receiving platforms on the roller. The card slots are all semi-circular. The central angle between every 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. A sliding groove is formed on the side plate. A block matching with the card slot is slidably installed inside the sliding groove. A pushing spring is arranged inside the card slot. The pushing spring is used to keep pushing the block out of the sliding groove towards the roller. When the card slot is aligned with the block, the pushing spring pushes the block into the card slot.

[0030] Although the way of pulling the ratchet by the pawl to drive the roller to rotate can drive the roller to move intermittently in cooperation with the convex die, when the pawl is separated from the ratchet, the roller may continue to rotate under the action of inertia, which may cause the material receiving platform not to be exactly located directly below the concave die, and then the part may not fit smoothly with the material receiving platform after falling.

[0031] Through the settings of the card slot and the slider, during the rotation of the drum, when the card slot aligns with the slider, the pushing spring pushes the slider into the card slot, effectively preventing the drum from rotating at an angle greater than the stroke angle due to inertia, and further ensuring the stability during the use of the device. At the same time, during the process of the pawl moving under the ratchet, although the pawl can rotate and avoid, there will still be squeezing contact between the pawl and the ratchet. This may cause the ratchet and the drum to rotate counterclockwise away from the sanding paper when the pawl moves under the ratchet, which is not conducive to the precise control of the rotation angle of the drum. By setting the card slot and the card block, the drum can be effectively blocked from rotating counterclockwise by inserting the card block into the card slot, ensuring the rotation accuracy of the drum.

[0032] Since the card slot is semicircular and the card block is also semicircular and matches the card slot, when the upward pawl pulls the ratchet to rotate clockwise towards the sanding paper, the card block can be disengaged from the card slot, without affecting the rotation of the ratchet and the drum.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The fully automatic sheet metal loading and unloading stamping machine designed by the present invention, compared with the existing stamping machines, is provided with a first push rod, a second push rod and a mechanical gripper, realizing the full-automatic operation of the stamping machine from loading to unloading. In addition, a drum and a sanding paper are also arranged below the female die. After the parts stamped out are caught by the material receiving platform on the drum, the drum drives the parts to contact the sanding paper for grinding, realizing the automatic removal of burrs and flash on the parts after stamping by the stamping machine, and further improving the production efficiency of the stamping machine.

[0034] 2. The fully automatic sheet metal loading and unloading stamping machine designed by the present invention is also provided with a ratchet and a pawl on the drum. The pawl is connected to the punch through a transmission rod, enabling the pawl to move up and down synchronously with the punch. Then, the pawl pulls the ratchet, and further drives the drum to rotate, making the drum move synchronously with the up and down movement of the punch. This not only ensures the movement synchronism between the drum and the punch, but also reduces the control cost of the drum.

[0035] 3. The fully automatic sheet metal loading and unloading stamping machine designed by the present invention, compared with the existing stamping machines, is also provided with an airbag. The airbag cooperates with the "C"-shaped reinforcing plate, enabling the sanding paper to fit more with the parts on the drum, improving the grinding effect on the burrs and flash on the parts. In addition, the setting of the airbag can also prevent the parts from being stuck in the grinding gap when grinding the parts, improving the stability during the use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a front view of the present invention; Figure 3 is the right view of the present invention; Figure 4 The present invention Figure 2 is an enlarged view of part A in; Figure 5 is a schematic diagram of the state when the pawl moves upward and just contacts the ratchet in the present invention; Figure 6 is a schematic diagram of the internal structure of the drum in the present invention; Figure 7 The present invention Figure 6 is an enlarged view of part B in; Figure 8 The present invention Figure 6 is an enlarged view of part C in; Figure 9 The present invention Figure 6 is an enlarged view of part D in; Figure 10 is a three-dimensional structure schematic diagram of the drum installed on the mounting shaft in the present invention.

[0037] In the figure: 1, frame; 2, mounting plate; 3, punch; 4, first driving assembly; 5, die; 6, loading platform; 7, first push rod; 8, storage table; 9, grasping assembly; 10, unloading platform; 11, drum; 12, receiving platform; 13, stroke angle; 14, abrasive paper; 15, transmission rod; 16, ratchet; 17, pawl; 18, vacuum chuck; 19, vertical plate; 20, airbag; 21, reinforcing plate; 22, grinding gap; 23, guiding part; 24, guiding port; 25, retaining piece; 26, mounting shaft; 27, air cavity; 28, blocking piece; 29, clamping groove; 30, side plate; 31, sliding groove; 32, clamping block; 33, pushing spring; 34, material; 35, second push rod; 36, waste; 37, collection tank. Detailed implementation manners

[0038] Please refer to Figures 1 to 10 , the present invention provides a fully automatic sheet metal loading and unloading stamping machine, and the technical solution is as follows: A fully automatic sheet metal loading and unloading stamping machine, referring to Figures 1 to 3, including a frame 1, on which a mounting plate 2 is provided, and a punch 3 is fixedly installed below the mounting plate 2. In this embodiment, taking the production of a strip-shaped plate part with a length of 60 mm, a width of 20 mm, and a thickness of 4 mm as an example. Therefore, the length of the punch 3 is 60 mm and the width is 20 mm. The material 34 is selected as an aluminum alloy plate with a width of 100 mm, a length of 400 mm, and a thickness of 4 mm. A first driving component 4 for driving the mounting plate 2 to move up and down is also provided on the frame 1. The first driving component 4 uses a combination of a flywheel and a motor to drive the mounting plate 2 to reciprocate up and down. It is also possible to use a hydraulic rod to drive the mounting plate 2 to move up and down to achieve the stamping effect, but the speed of driving the mounting plate 2 by the hydraulic rod is relatively slow. In addition, the first driving component 4 can also be a cylinder or other mechanisms or devices that can drive the mounting plate 2 to reciprocate up and down.

[0039] Reference Figure 1 、 Figure 3 And Figure 6 , a die 5 adapted to the punch 3 is fixedly installed on the frame 1. The die 5 is located directly below the punch 3. The length of the cutting edge of the die 5 is also 60 mm and the width is also 20 mm, and the length and width of the die 5 are respectively aligned with the length and width of the punch 3 in the vertical direction. 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, and the first push rod 7 is used to horizontally push the material 34 towards the die 5. A storage platform 8 is provided in front of the loading platform 6, and the storage platform 8 is used to store the material 34. A grasping component 9 for grasping the material 34 on the storage platform 8 and placing it on the loading platform 6 is provided on the storage platform 8. The grasping component 9 can use a robotic arm to grasp the material 34. In this embodiment, the grasping component 9 is installed with two electric guides vertically on a gantry, and then an electric guide is horizontally installed on the sliders of the two electric guides. The slider of the horizontally installed electric guide is arranged downward, and then a suction cup is fixedly installed below the slider of the horizontally installed electric guide. The material 34 is grasped to a specified position through the suction cup. The suction cup can be connected to an external vacuum mechanism, such as a vacuum generator, to control the grasping and releasing of the material 34 by the suction cup.

[0040] Reference Figure 1 , a blanking platform 10 for storing waste 36 is provided on the left side of the frame 1. The blanking platform 10 is located below the left side of the frame 1. A second push rod 35 for pushing the waste 36 towards the blanking platform 10 is also provided on the left side of the frame 1.

[0041] Reference Figure 2 And Figures 6 to 10, a mounting shaft 26 is horizontally and fixedly installed on the frame 1. The mounting shaft 26 is located directly below the female die 5, and the axis of the mounting shaft 26 is perpendicular to the front surface of the frame 1. A roller 11 is also provided on the frame 1. The inside of the roller 11 is hollow and forms a cylindrical air cavity 27 coaxial with the roller 11. The roller 11 is coaxially installed on the mounting shaft 26, and the roller 11 and the mounting shaft 26 are rotationally connected in a mechanically sealed manner to ensure the airtightness of the air cavity 27. The roller 11 is connected to an external air extraction assembly for providing negative pressure to the air cavity 27. Among them, the air extraction assembly 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 in the outer wall of the roller 11. The length of each material receiving platform 12 is 80 mm, and the width is 40 mm. When the material receiving platforms 12 are opened, side walls should be ensured around. Since the outer wall of the roller 11 is arc-shaped, the side walls around the material receiving platforms 12 should be at least 1 mm higher than the lowest point of the material receiving platforms 12. In this embodiment, the height of the side wall at the long side of the material receiving platform 12 is set to 1 mm. The length and width directions of the material receiving platforms 12 are the same as the length and width directions of the female die 5. The eight material receiving platforms 12 are circumferentially and evenly distributed on the roller 11 with the axis of the roller 11 as the reference. The central angle of the circle formed by the midpoints of two adjacent material receiving platforms 12 in the cross-section of the roller 11 is the stroke angle 13. In this embodiment, since eight material receiving platforms 12 are provided, the stroke angle 13 is 45°. A collection tank 37 is provided directly below the roller 11.

[0042] Reference Figure 6 and Figure 7 , four baffles 25 are fixedly installed below the female die 5. The four baffles 25 are all elastic plastic sheets. The upper ends of the four baffles 25 are fixedly installed at the bottom of the female die 5. The four baffles 25 enclose a rectangle and completely enclose the cutting edge of the female die 5 inside the rectangle. The lower ends of the four baffles 25 all abut against the roller 11. Among them, the length of the rectangle formed by the four baffles 25 is 80 mm, and the width is 40 mm, 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 respectively coincide with the four sides of the material receiving platform 12 Reference Figure 6 , Figure 7 and Figure 9, a vertical plate 19 is fixedly installed on the right side of the drum 11. An airbag 20 is fixedly installed on the vertical plate 19. The airbag 20 is located between the drum 11 and the vertical plate 19. A "C"-shaped reinforcing plate 21 is fixedly installed on the side of the airbag 20 facing the drum 11. The reinforcing plate 21 is a thin plastic plate with a thickness of 2 mm - 3 mm. The axis of the "C"-shaped reinforcing plate 21 coincides with the axis of the drum 11. A grinding sandpaper 14 is fixedly installed on the side of the reinforcing plate 21 facing the drum 11. The grinding sandpaper 14 is used to grind the burrs and flash on the parts. The distance between the grinding sandpaper 14 and the drum 11 is the grinding gap 22. In this embodiment, the grinding gap 22 is set to 2.5 mm. A guiding portion 23 is provided on the upper side of the reinforcing plate 21. A horn-shaped guiding port 24 is formed between the guiding portion 23 and the outer wall of the drum 11. The large end of the horn-shaped guiding port 24 faces the direction of the female die 5.

[0043] In addition, referring to Figure 6 and Figure 8 , a card slot 29 is provided between every two material receiving platforms 12 on the drum 11. The card slots 29 are all semi-circular. 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 drum 11. A sliding groove 31 is formed on the side plate 30. A block 32 matching with the card slot 29 is slidably installed inside the sliding groove 31. A pushing spring 33 is arranged inside the card slot 29. The pushing spring 33 is used to keep pushing the block 32 out of the sliding groove 31 towards the direction of the drum 11. When the card slot 29 is aligned with the block 32, the pushing spring 33 pushes the block 32 into the inside of the card slot 29.

[0044] Referring to Figures 6 to 9 , a fixing component is arranged on each mounting plate 2. The fixing components all include vacuum suction cups 18 installed on the material receiving platforms 12. The vacuum suction cups 18 are all communicated with the air cavity 27. A semi-circular blocking piece 28 is also fixedly installed on the mounting shaft 26. The diameter of the blocking piece 28 is the same as the diameter of the air cavity 27. The blocking piece 28 is used to cut off the communication between the vacuum suction cup 18 and the air cavity 27. The blocking piece 28 is inclined and located on the side away from the grinding sandpaper 14. When the vacuum suction cup 18 rotates to the highest point of the drum 11, the vacuum suction cup 18 is just completely communicated with 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 just completely blocked by the blocking piece 28.

[0045] Referring to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6, a second driving assembly for driving the roller 11 to rotate is further arranged on the frame 1. The second driving assembly includes a transmission rod 15 which is vertically arranged and fixedly connected to the mounting plate 2 and can move up and down together with the punch 3. A ratchet wheel 16 is fixedly installed at the end of the roller 11, and a ratchet pawl 17 which cooperates with the ratchet wheel 16 is rotatably installed at the lower end of the transmission rod 15. The ratchet pawl 17 is arc-shaped and can swing up and down along the vertical plane. During setting, without considering inertia, when the ratchet pawl 17 moves upward following the punch 3, from the moment when the ratchet pawl 17 contacts the ratchet wheel 16 to the moment when the ratchet pawl 17 just completely disengages from the ratchet wheel 16, the rotation angle of the ratchet pawl 17 is the same as the stroke angle 13.

[0046] In the initial state, referring to Figure 6 , Figure 7 , one of the material receiving platforms 12 on the roller 11 is located at the top of the roller 11 and directly below the female die 5. The material receiving platform 12 is parallel to the upper surface of the female die 5, and the four sides of the material receiving platform 12 coincide with the four retaining pieces 25. The external air extraction assembly keeps extracting air inside the air chamber 27 so that the air pressure inside the air chamber 27 is lower than the air pressure outside the roller 11. At this time, the clamping block 32 is pushed by the spring and snaps into the clamping groove 29.

[0047] During use, the materials 34 are neatly stacked on the storage table 8. Subsequently, the suction cup on the grasping assembly 9 moves directly above the stacked materials 34. Then, the suction cup on the grasping assembly 9 moves downward towards the materials 34. When the suction cup moves downward to contact the materials 34, the suction cup stops moving downward. By means of an external vacuum generator, the suction cup becomes negative pressure. In this way, the suction cup on the grasping assembly 9 can firmly adsorb the materials 34. Subsequently, the grasping assembly 9 controls the movement of the suction cup through an electric guide rail, 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 female die 5 are on the same horizontal line. Finally, the suction cup moves downward to place the materials 34 on the feeding platform 6 in front of the push rod, and then the grasping assembly 9 resets.

[0048] After that, the first push rod 7 starts to push the materials 34 to move horizontally towards the female die 5. When the materials 34 completely cover the cutting edge of the female die 5 and the front end of the materials 34 exceeds the cutting edge of the female die 5 by 10 mm, the first push rod 7 stops. Subsequently, the first driving assembly 4 drives the mounting plate 2 and the punch 3 to move downward, and the punch 3 cooperates with the cutting edge of the female die 5 to cut the materials 34 into strip-shaped plate parts with a length of 60 mm, a width of 20 mm and a thickness of 4 mm.

[0049] During the downward movement of the punch 3, the pawl 17 is driven downward by the transmission rod 15, and the pawl 17 is kept perpendicular to the transmission rod 15 under its own weight. When the pawl 17 contacts the ratchet teeth on the ratchet wheel 16 during the downward movement, the pawl 17 rotates upward to avoid the ratchet teeth, and after the pawl 17 passes over the ratchet teeth, the pawl 17 returns to the perpendicular state to the transmission rod 15 under its own weight. When the punch 3 moves to the lowest point, the punch 3 cooperates with the die 5 to complete the stamping of the parts. At this time, the pawl 17 has also passed over the ratchet teeth of the ratchet wheel 16 and moved to the bottom of the ratchet teeth of the ratchet wheel 16.

[0050] 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 .

[0051] Then, refer to Figures 4 to 9 , the first driving 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 wheel 16, the pawl 17 pulls the ratchet teeth of the ratchet wheel 16 to move upward and gives the ratchet wheel 16 a torque, and the pawl 17 starts to drive the ratchet wheel 16 to rotate clockwise in the direction of the sandpaper 14. Since the ratchet wheel 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 wheel 16, the semicircular block 32 at the front end will be disengaged 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 is out of contact with the ratchet teeth of the ratchet wheel 16, the ratchet wheel 16 just rotates a stroke angle 13, that is, the ratchet wheel 16 and the roller 11 just rotate 45°. At this time, the first part follows the rotation of the roller 11 and has entered the grinding gap 22 under the guidance of the guide part 23. At this time, the block 32 is also smoothly inserted into the next slot 29 under the elastic force of the push spring 33 to prevent the roller 11 from continuing to rotate under the action of inertia. It should be noted here that because the slot 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 one slot 29 to aligning the block 32 with the next slot 29 after the roller 11 rotates. Since the material receiving platform 12 is recessed, the block 32 will first be inserted 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, during the process of the pawl 17 pulling the ratchet 16 to rotate, until the pawl 17 is completely separated from the ratchet 16, the pawl 17, driven by the first driving assembly 4, continues to apply a torque to the ratchet 16, so 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.

[0052] When the pawl 17 just completely disengages from the ratchet wheel 16, refer to Figure 2 and Figures 4 to 9 , the next blank receiving platform 12 will move to directly below the female die 5, and the bottom of the female die 5 is parallel to the surface of the female die 5. Subsequently, the first push rod 7 horizontally pushes the material 34 towards the female die 5 by another 30 mm, and then the first push rod 7 stops. The first driving assembly 4 drives the male die 3 to move downward again, and the male die 3 cooperates with the cutting edge of the female die 5 to punch and cut the material 34 to produce parts again. The parts will ultimately also fall onto the receiving platform 12 and be adsorbed and fixed on the receiving platform 12 by the vacuum suction cup 18. When the male die 3 moves upward to reset, the pawl 17 drives the ratchet wheel 16 and the roller 11 to rotate clockwise towards the abrasive paper 14. The two cut plate-shaped parts are both conveyed towards the abrasive paper 14. Previously, the first part has entered the grinding gap 22. After the second part is fixed to the receiving platform 12, when the roller 11 rotates again, the first part will rotate in the grinding gap 22 following the roller 11. When the part rotates in the grinding gap 22, the edge of the upper surface of the part will continuously frictionally contact the abrasive paper 14, and the abrasive paper 14 can grind and remove the flash and burrs on the part. And due to the setting of the airbag 20, the airbag 20 can deform to a certain extent when being pressed, which enables the abrasive paper 14 to better contact the top surface of the part and as much as possible grind and remove the flash and burrs on the part, improving the grinding effect. In addition, the setting of the airbag 20 can also prevent the part from getting stuck inside the grinding gap 22 through the deformation of the airbag 20, ensuring the stability during the use of the equipment.

[0053] As the male die 3 and the female die 5 continuously punch out parts, refer to Figure 2 , Figure 6 and Figure 9 , the punched parts also continuously fall onto the receiving platform 12 and rotate with the roller 11 into the grinding gap 22 to be ground by the abrasive paper 14. When the receiving platform 12 leaves the inside of the grinding gap 22 with the part, the grinding of the part is completed. When the receiving platform 12 with the ground part continues to rotate to directly below the roller 11, the vacuum suction cup 18 on the receiving platform 12 located directly below the roller 11 will be blocked by the blocking piece 28 to isolate its communication with the air cavity 27. At this time, the vacuum suction cup 18 fails, and the ground part falls into the collection tank 37 under the action of its own gravity and is collected.

[0054] Refer to Figures 6 to 9, and since the blocking piece 28 is semi-circular, during the stroke before the vacuum suction cup 18 moves from the lowest point of the drum 11 to the highest point of the drum 11, the material receiving platform 12 does not participate in the bearing of the parts. Therefore, this section of the formation will completely cut off the connection between the vacuum suction cup 18 and the air cavity 27 throughout the process to ensure the suction force of the vacuum suction cup 18 on the material receiving platform 12 that actually bears the parts.

[0055] Reference 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 towards 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. Then, the second push rod 35 pushes the material 34 forward, causing the material 34 to fall onto the blanking platform 10 and stack up.

[0056] Just need to continuously repeat the above steps to achieve continuous production. When judging whether the material 34 has become waste 36, it can be judged by using the method of camera vision detection, or it can be judged by calculating the length of the material 34 and the number of stamping times to determine whether the material 34 can still be used.

[0057] It should be added that, reference Figures 6 to 9 , before all the vacuum suction cups 18 that can communicate with the air cavity 27 adsorb and fix the parts to the corresponding material receiving platforms 12, due to the connection between the vacuum suction cup 18 and the air outside the drum 11, the negative pressure inside the air cavity 27 may be difficult to provide sufficient suction force to fix the parts. However, before the parts enter the grinding gap 22 following the material receiving platform 12, when passing through the guiding part 23, the guiding part 23 will guide and flatten the parts onto the material receiving platform 12. After entering the grinding gap 22, due to the resistance of the grinding sandpaper 14, the parts that are not fully fixed may undergo relative displacement with the drum 11 under the action of the frictional force of the grinding sandpaper 14, that is, the drum 11 rotates clockwise and the parts rotate counterclockwise relative to the drum 11. When the side wall of the parts abuts against the side wall of the material receiving platform 12, the material receiving platform 12 can give the parts a thrust to drive the parts to continue moving along the grinding gap 22 without worrying about the parts getting stuck inside the grinding gap 22.

[0058] Moreover, reference Figure 6, the above situation will not last long. Before the first part leaves the grinding gap 22, all the parts can be guaranteed to be carried on the receiving platform 12 where all the vacuum suction cups 18 that can communicate with the air chamber 27 are located. At this time, due to the shielding of the parts on the vacuum suction cups 18 and the blocking of the vacuum suction cups 18 by the blocking pieces 28, the air chamber 27 is no longer in communication with the external air, and the air pressure inside the air chamber 27 can be kept stable, providing sufficient adsorption force for the subsequent parts to firmly fix the parts on the receiving platform 12 and ensuring the stable operation of the equipment.

[0059] The above has described in detail a specific embodiment of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiment. For those skilled in the art, without departing from the principles and ideas of the present invention, various changes, modifications, substitutions, and variations made to these embodiments should still fall within the protection scope of the present invention.

Claims

1. A fully automatic sheet metal loading and unloading stamping machine, comprising a frame (1), an installation plate (2) is arranged on the frame (1), a punch (3) is arranged below the installation plate (2), a first driving component (4) for driving the installation plate (2) to move up and down is further arranged on the frame (1), a die (5) is installed on the frame (1), a loading platform (6) is arranged on the right side of the frame (1), a first push rod (7) is arranged on the loading platform (6), a material storage table (8) is arranged in front of the loading platform (6), a grasping component (9) is arranged on the material storage table (8), a blanking platform (10) is arranged on the left side of the frame (1), and it is characterized in that, A drum (11) is also horizontally installed on the frame (1). The drum (11) is located directly below the female die (5). A plurality of material receiving platforms (12) are provided on the drum (11). A second driving assembly for driving the drum (11) to rotate is provided on the frame (1). A fixing assembly is provided on each mounting plate (2). The fixing assembly is used to fix the parts falling from the female die (5) on the mounting plate (2). A polishing sandpaper (14) is provided on the right side of the drum (11). A collection trough (37) is provided directly below the drum (11). When the drum (11) rotates towards the polishing sandpaper (14), the polishing sandpaper (14) contacts the parts and deburrs the parts.

2. The full-automatic sheet metal loading and unloading stamping machine according to claim 1, wherein, The second driving assembly includes a transmission rod (15). The transmission rod (15) is vertically arranged and is fixedly connected to the mounting plate (2) and can move up and down together with the punch (3). A ratchet wheel (16) is fixedly installed at the end of the drum (11). A ratchet pawl (17) cooperating with the ratchet wheel (16) is rotatably installed at the lower end of the transmission rod (15). The ratchet pawl (17) can swing up and down along a vertical plane. When the transmission rod (15) moves up and down with the mounting plate (2) for one cycle, the ratchet pawl (17) hooks the ratchet wheel (16) and drives the ratchet wheel (16) to rotate, and the rotation angle of the ratchet wheel (16) is the same as the stroke angle (13).

3. The full-automatic sheet metal loading and unloading stamping machine according to claim 1, characterized in that, The fixing assembly includes a vacuum suction cup (18) installed on the material receiving platform (12). The vacuum suction cup (18) is connected to an external air extraction assembly for providing negative pressure to the vacuum suction cup (18).

4. The full-automatic sheet metal loading and unloading stamping machine according to claim 1, characterized in that, A vertical plate (19) is fixedly installed on the right side of the drum (11). An air bag (20) is fixedly installed on the vertical plate (19). The air bag (20) is located between the drum (11) and the vertical plate (19). A "C"-shaped reinforcing plate (21) is fixedly installed on the side of the air bag (20) facing the drum (11). The axis of the "C"-shaped reinforcing plate (21) coincides with the axis of the drum (11). The polishing sandpaper (14) is fixedly installed on the side of the reinforcing plate (21) facing the drum (11). The distance between the polishing sandpaper (14) and the drum (11) is the polishing gap (22).

5. The full-automatic sheet metal loading and unloading stamping machine according to claim 4, characterized in that, A guiding portion (23) is provided on the upper side of the reinforcing plate (21). A trumpet-shaped guiding opening (24) is formed between the guiding portion (23) and the outer wall of the drum (11). The large end of the trumpet-shaped guiding opening (24) faces the direction of the female die (5).

6. The full-automatic sheet metal loading and unloading stamping machine according to claim 3, characterized in that, Four retaining pieces (25) are fixedly installed below the female die (5). The four retaining pieces (25) are all elastic plastic sheets. The upper ends of the four retaining pieces (25) are fixedly installed at the bottom of the female die (5). The four retaining pieces (25) enclose a rectangle and completely enclose the cutting edge of the female die (5) inside the rectangle. The lower ends of the four retaining pieces (25) are all abutted against the drum (11).

7. The full-automatic sheet metal loading and unloading stamping machine according to claim 3, wherein, A mounting shaft (26) is horizontally and fixedly mounted on the frame (1). The inside 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 in the same vertical plane and are all communicated with the air cavity (27). The roller (11) is rotatably mounted on the mounting shaft (26) in a mechanical seal manner. A semi-circular blocking piece (28) is arranged on the mounting shaft (26). The diameter of the blocking piece (28) is the same as the diameter of the air cavity (27). The blocking piece (28) is used to cut off the communication between the vacuum suction cups (18) and the air cavity (27). The blocking piece (28) is inclined and located on the side away from the abrasive paper (14). When the vacuum suction cups (18) rotate to the highest point of the roller (11), the vacuum suction cups (18) are just completely communicated with the air cavity (27). When the vacuum suction cups (18) rotate to the lowest point of the roller (11), the vacuum suction cups (18) are just completely blocked by the blocking piece (28).

8. A fully automatic sheet metal loading and unloading stamping machine according to claim 2, wherein, A card slot (29) is provided between every two material receiving platforms (12) on the roller (11). The card slots (29) are all semi-circular. 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 mounted on the frame (1) on the left side of the roller (11). A sliding groove (31) is formed in the side plate (30). A block (32) matching the card slot (29) is slidably mounted in the sliding groove (31). A pushing spring (33) is arranged inside the card slot (29). The pushing spring (33) is used to keep pushing the block (32) out of the sliding groove (31) in the direction of the roller (11). When the card slot (29) is aligned with the block (32), the pushing spring (33) pushes the block (32) into the card slot (29).

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