Easy-open lid stamping equipment

Abstract

The present invention discloses a punching and forming device for easy-open lids, which relates to the technical field of punching equipment and includes a machine body, a punching and forming component, and a conveying component; further including: a reeling component, which is arranged at the front end of the machine body and is used to release aluminum coils; a punching component, which is installed at the front of the machine body and is used to cut the released aluminum coils into aluminum sheets of the same size; a sheet-cutting component, which is installed at the rear of the machine body and is used to prefabricate the sheets into discs of the same shape; and a stress relief component, which is installed at the middle of the machine body and is used to release the stress of the aluminum coils. The present invention provides a punching component to punch out the released aluminum coils into aluminum sheets of equal size, and provides a mold for punching out the aluminum coils with a structure having serrations on one side, thereby being able to punch out aluminum sheets with serrated edges. The convex parts of the sheet at the extreme edges of the front and rear sides can be used to cut out complete discs, thereby reducing the area of ​​the unpunched parts on the front and rear sides of each aluminum sheet, thereby reducing the amount of aluminum waste.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping equipment, and in particular to a punching and forming equipment for easy-open lids. Background Art

[0002] Easy-open lids are lids with pull rings used to seal cans. They are metal packaging products, mostly made of aluminum or tinplate. They come in a variety of sizes and are suitable for iron cans, aluminum cans, composite cans, PET plastic cans, and paper cans. The production of metal easy-open lids involves unwinding, slitting, sheeting, and stamping to obtain finished products.

[0003] Metal materials are usually cut into rectangular sheets first, and blanks are punched out on the rectangular sheets. However, this method will cause gaps between adjacent punched parts and waste of material at the edge of the sheet, such as Figure 12 As shown in FIG, it is a schematic diagram of the stamping position distribution under a conventional stamping process. In this stamping method, the stamping control logic is simple and the stamping process is not prone to errors. However, the gaps between adjacent stamping parts are large, resulting in a large amount of material waste between adjacent stamping parts. Figure 13 The figure shows an improved stamping method. As can be seen from the schematic, this method creates smaller gaps between adjacent punching areas, resulting in less wasted material. However, this method wastes a larger area at the sheet edges. This means that the latter method can save material by reducing the area of ​​the edge during each punching, resulting in larger sheets during punching. However, due to the limitations of the subsequent stamping process, the sheets cannot be continuously expanded, and larger sheets are more inconvenient to handle.

[0004] The Chinese invention patent with publication number CN114406122B can solve the above-mentioned technical problems by directly unwinding without slitting. The technical solution disclosed in the patent document is as follows: An aluminum cover stamping machine includes a stamping mechanism, and also includes a left mounting base, a right mounting base, a loading trolley and an unloading trolley. The left mounting base is arranged at the left end of the stamping mechanism, and the right mounting base is arranged at the right end of the stamping mechanism. A powerful fan is arranged between the stamping mechanism and the left mounting base, and the powerful fan is connected to a hose, and the hose is connected to an elbow, and the elbow is connected to a duckbill gradient cylinder. The elbow is connected to the front end of the stamping mechanism through a connecting assembly, and a double-headed loading rack is installed on the left mounting base, and a double-headed unloading rack is installed on the right mounting base. The design of double-head loading rack and double-head unloading rack realizes alternating loading and unloading at both ends. The loading rack and unloading rack have little influence on the stamping operation of the stamping mechanism during the loading and unloading process, which further improves the production efficiency to a certain extent. The cooperation of the loading and unloading car makes the loading and unloading operations more labor-saving. However, since the material is stamped during the unwinding and rewinding process, it is impossible to flexibly control its movement in the direction perpendicular to the traction direction. In addition, multiple stamping heads are usually arranged in parallel under this method, and the stamping results are different from the actual stamping results. Figure 12 In addition, there is stress in the coil itself, and if the material is released and used directly for stamping, there will be a small amount of distortion, which will affect the stamping effect. Summary of the Invention

[0005] The object of the present invention is to provide a punching and forming device for an easy-open lid, so as to solve the problem that the traditional punching method cannot fully utilize the material between adjacent punching parts.

[0006] To achieve the above-mentioned purpose, the present invention discloses an easy-open lid stamping and forming equipment, including a body, a stamping and forming component, a conveying component, a reeling component, a punching component, a sheet-opening component, a stress-relieving component and a moving component; the reeling component is arranged at the front end of the body, for releasing the aluminum coil; the punching component is installed at the front of the body, for cutting the released aluminum coil into aluminum sheets of the same size; the sheet-opening component is installed at the rear of the body, for prefabricating the sheets into round sheets of the same shape; the stress-relieving component is installed in the middle of the body, for releasing the stress of the aluminum coil; the moving component is used to control the aluminum sheet to move to the side away from the unwinding component; the punching component includes a first hydraulic press, the movable part of the first hydraulic press is fixedly connected to the punching upper die by screws, and a punching lower die is also provided on the top of the body, and the front sides of the punching upper die and the punching lower die are both provided with a serrated structure.

[0007] By adopting the above technical solution, a punching component is set to punch out the released aluminum coil into aluminum sheets of equal size, and the mold for punching out the aluminum coil is set to a structure with serrations on one side, so that aluminum sheets with serrated edges can be punched out. The protruding parts of the sheets of this shape are located at the outermost edges of the front and rear sides, and complete round pieces can be cut out, thereby reducing the area of ​​the unpunched parts on the front and rear sides of each aluminum sheet, thereby reducing the amount of aluminum waste.

[0008] A further improvement of the technical solution of the present invention is that: the sheet-opening component includes a second hydraulic press, the movable part of the second hydraulic press is fixedly connected to the upper sheet-opening mold by screws, the machine body is located below the upper sheet-opening mold and is fixedly installed with the lower sheet-opening mold, the movable part of the second hydraulic press is also fixedly connected to the mounting ring, six through holes are opened in a ring shape and equidistantly on the mounting ring, each through hole is slidably connected with a pressure rod, the tops of the pressure rods are fixedly connected with a limiting ring, the bottoms of the pressure rods are fixedly connected with a pressure head, the outside of the pressure rods and between the mounting ring and the pressure head are each provided with a first spring, and the pressure head is a flexible block; the sheet-opening component also includes a servo module, the movable part of the servo module is fixedly connected to the moving platform, and multiple groups of moving parts are provided on the machine body and the moving platform; a discharge trough is opened on the top of the machine body, the bottom of the lower sheet-opening mold is facing the discharge trough, and a guide plate is fixedly connected to the inside of the discharge trough.

[0009] By adopting the above technical solution, a pressure head is set up that can move synchronously with the upper sheet mold. In the initial state, the pressure head is below the upper sheet mold under the action of the first spring. During the downward process of the upper sheet mold, the pressure head will contact and press the aluminum sheet in advance, thereby fixing the aluminum sheet. There are multiple pressure heads, which can be fully fixed around the punched position.

[0010] A further improvement of the technical solution of the present invention is that: the moving parts include a motor, a transmission structure and several conveying roller groups; the conveying roller group includes a mounting frame, a feed roller, a screw, an adjustment block and a driven roller, the feed roller is rotatably connected between the inner sides of the mounting frame, and adjustment grooves are symmetrically opened on both sides of the mounting frame, a screw hole is opened on the top of the adjustment groove, the screw is threadedly connected to the screw hole, the top of the screw has a screw head, the bottom of the screw is rotatably connected to the adjustment block, the adjustment block is slidably connected to the adjustment groove, and the driven roller is rotatably connected to the side close to the two adjustment blocks; one end of the central axis of the feed roller extends to the outside of the mounting frame and is connected by a transmission structure, the motor is connected to the transmission structure, and when the motor is working, the transmission structure drives each feed roller to rotate synchronously.

[0011] With the above technical solution, after the aluminum coil is unwound, it is transported by a pair of rollers consisting of a feed roller and a driven roller. The aluminum sheet is located between the feed roller and the driven roller, and the aluminum sheet fits tightly against the feed roller and the driven roller. When feeding, the motor works and drives each feed roller to rotate through the transmission structure, so that the aluminum sheet is transported to the rear.

[0012] A further improvement of the technical solution of the present invention is that: two mounting columns are symmetrically fixedly connected to the top of the machine body, the top of the mounting columns is fixedly connected to a limiting block, the punching lower die is slidably connected between the two mounting columns, and the outside of the mounting columns is located below the punching lower die and is sleeved with a second spring, and the side of the punching lower die away from the serrations is also fixedly connected to a conveying roller group, and the adjustment block in the conveying roller group is fixedly connected to a linkage frame, and both sides of the punching upper die are fixedly connected to linkage blocks, and the top of the machine body is fixedly connected to a support block in contact with the punching lower die, and the side of the support block close to the punching lower die is provided with serrations that engage with the punching lower die.

[0013] By adopting the above technical solution, when the punching upper die contacts the top of the aluminum sheet, the punching lower die actively moves downward with the punching lower die to provide space, instead of moving downward by squeezing the aluminum sheet, so that the aluminum sheet will not be severely squeezed during the punching process, thereby reducing damage to the aluminum sheet.

[0014] A further improvement of the technical solution of the present invention is that the stress relief component includes two side panels fixedly connected to the top of the machine body, a through groove is opened in the middle of the side panel, a sliding rod is fixedly connected between the top and bottom of the inner wall of the through groove, the outside of the sliding rod is slidably connected to a follower block, an auxiliary roller is rotatably connected between the sides of the two follower blocks that are close to each other, and an auxiliary roller is also rotatably connected between the sides of the two side panels that are close to each other, and a third spring is sleeved on the outside of the sliding rod and located above the follower block.

[0015] By adopting the above technical solution, a stress relief component is set behind the punching component. In the process, the aluminum coil is first punched, and then the cut sheet is stress-straightened, so as to eliminate the stress in the sheet without concentrating the stress on the aluminum coil; specifically, the aluminum sheet passes through the auxiliary roller during the transportation process. Due to the elastic force of the third spring on the follower block, the auxiliary roller exerts a certain extrusion pressure on the aluminum sheet. During the traction process of the aluminum sheet, it will be straightened by the above-mentioned auxiliary roller, and the stress will also be released at the end of the aluminum sheet.

[0016] A further improvement of the technical solution of the present invention is that: a fixed plate is fixedly connected to the side away from the side plate, a retarder is fixedly connected to one side of the fixed plate, a limited flow hole is provided on the retarder, a piston plate is slidably connected between the inner walls of the retarder, a connecting rod is fixedly connected to the piston plate, the end of the connecting rod away from the piston plate passes through the fixed plate and is fixedly connected to the transmission frame, the connecting rod is slidably connected to the fixed plate, both ends of the central axis of the auxiliary roller extend to the other side of the follower block and are fixedly connected to a turntable, a transmission pin is fixedly connected to the side of the turntable away from the auxiliary roller, and the transmission pin is in contact with the inner wall of the transmission frame.

[0017] By adopting the above technical solution, a speed-limiting structure for the auxiliary rollers is set up so that when the aluminum sheet is pulled and passes between the two auxiliary rollers, the speed of the auxiliary rollers cannot keep up with the feed roller. The two auxiliary rollers roll relative to the aluminum sheet and slide at the same time, thereby generating resistance (friction generated by relative sliding) to the aluminum sheet passing later, thereby straightening the aluminum sheet.

[0018] A further improvement of the technical solution of the present invention is that a hollow stud connected to the flow limiting hole is fixedly connected to the retarder, an air valve cap is connected to the external thread of the hollow stud, and a strip groove is opened on the hollow stud.

[0019] By adopting the above technical solution, a hollow stud is set at the position of the flow limiting hole, and a strip groove is opened on the hollow stud. When the gas nozzle cap covers the hollow stud to different degrees, the strip groove will also be blocked to different degrees, so that the size of the area for gas exchange with the outside through the strip groove changes, thereby realizing the adjustment of the gas flux through the strip groove to adapt to different conveying speeds.

[0020] A further improvement of the technical solution of the present invention is that the diameter of the lower part of the die hole of the lower opening die is larger than that of the upper part.

[0021] By adopting the above technical solution, the blank is separated from the die hole of the lower sheeting die after being punched out, thereby avoiding friction that hinders the blank from falling and causing material jamming.

[0022] The present invention has the following technical effects:

[0023] 1. The present invention provides a punching component to punch out the released aluminum coil into aluminum sheets of equal size, and the die for punching out the aluminum coil is configured with a serrated structure on one side, thereby being able to punch out aluminum sheets with serrated edges. The protruding parts of the sheets at the front and rear edges can be used to cut out complete circular pieces, thereby reducing the area of ​​the unpunched parts on the front and rear sides of each aluminum sheet, thereby reducing the amount of aluminum waste.

[0024] 2. The present invention provides a pressure head that can move synchronously with the upper sheet-opening mold. In the initial state, the pressure head is below the upper sheet-opening mold under the action of the first spring. During the downward movement of the upper sheet-opening mold, the pressure head will contact and press the aluminum sheet in advance, thereby fixing the aluminum sheet. There are multiple pressure heads, which can be fully fixed around the punched position.

[0025] 3. The present invention arranges a stress relief component behind the punching component. In the process, the aluminum coil is first punched and then the cut sheet is stress-straightened, so as to eliminate the stress in the sheet without concentrating the stress on the aluminum coil. Specifically, the aluminum sheet passes through the auxiliary roller during transportation. Due to the elastic force of the third spring on the follower block, the auxiliary roller exerts a certain extrusion force on the aluminum sheet. During the pulling process of the aluminum sheet, it will be straightened by the above-mentioned auxiliary roller, and the stress will also be released at the end of the aluminum sheet.

[0026] 4. The present invention sets a speed-limiting structure for the auxiliary rollers so that when the aluminum sheet is pulled and passes between the two auxiliary rollers, the rotation speed of the auxiliary rollers cannot keep up with the feed roller. The two auxiliary rollers roll relative to the aluminum sheet and slide at the same time, thereby generating friction resistance to the aluminum sheet passing later, thereby straightening the aluminum sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the three-dimensional structure of the present invention from a first viewing angle;

[0028] Figure 2 is a schematic diagram of the three-dimensional structure of the present invention from a second viewing angle;

[0029] Figure 3 It is a structural schematic diagram of the machine body and the second hydraulic press of the present invention;

[0030] Figure 4 This is a structural diagram of the upper sheet mold of the present invention;

[0031] Figure 5 It is a partial structural diagram of the machine body and the first hydraulic press of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the body of the present invention;

[0033] Figure 7 This is a schematic structural diagram of the mobile platform and its top moving parts of the present invention;

[0034] Figure 8 It is a structural schematic diagram of the conveying roller group of the present invention;

[0035] Figure 9 It is a schematic diagram of the three-dimensional structure of the stress relief component of the present invention;

[0036] Figure 10 It is a structural schematic diagram of the working state of the stress relief component of the present invention;

[0037] Figure 11 It is a front structural schematic diagram of the stress relief component of the present invention;

[0038] Figure 12 This is one of the schematic diagrams of the distribution of aluminum sheets and stamping parts in the prior art;

[0039] Figure 13 This is the second schematic diagram of the distribution of aluminum sheets and stamping parts in the prior art;

[0040] Figure 14 This is a schematic diagram of the aluminum sheet after punching and the distribution of the punching parts of the present invention;

[0041] Figure 15Schematic diagram of the cross-sectional structure of the lower opening die of the present invention;

[0042] Figure 16 For the present invention Figure 9 Enlarged view of point A in the middle.

[0043] In the figure: 1. Machine body; 2. Unwinding part; 3. First hydraulic press; 4. Second hydraulic press; 5. Upper punching die; 6. Lower punching die; 7. Support block; 8. Mounting column; 9. Second spring; 10. Mounting frame; 11. Adjustment slot; 12. Screw; 13. Adjustment block; 14. Driven roller; 15. Feed roller; 16. Motor; 17. Transmission structure; 18. Linkage frame; 19. Linkage block; 20. Side plate; 21. Slide rod; 22. Follower block; 23. Third spring; 2 4. Auxiliary roller; 25. Fixed plate; 26. Retarder; 27. Piston plate; 28. Flow limiting hole; 29. ​​Hollow stud; 30. Valve cap; 31. Strip groove; 32. Connecting rod; 33. Turntable; 34. Transmission frame; 35. Transmission pin; 36. Upper sheet mold; 37. Mounting ring; 38. Pressure rod; 39. Pressure head; 40. First spring; 41. Limiting ring; 42. Lower sheet mold; 43. Servo module; 44. Discharge chute; 45. Guide plate; 46. Moving platform. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1 To the attached Figure 16 The principles and features of the present invention are described in detail with reference to the accompanying drawings and embodiments; the examples are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0045] Example 1

[0046] The present invention provides a punching and forming device for easy-open lids, comprising a machine body 1, a punching and forming component, a conveying component, a reeling component 2, a punching component, a sheet-opening component, a stress-relieving component, and a moving component. The reeling component 2 is arranged at the front end of the machine body 1 for releasing aluminum coils; the punching component is installed at the front of the machine body 1 for cutting the released aluminum coils into aluminum sheets of the same size; the sheet-opening component is installed at the rear of the machine body 1 for prefabricating the sheets into circular sheets of the same shape; the stress-relieving component is installed at the middle of the machine body 1 for releasing the stress of the aluminum coils; the moving component is used to control the aluminum sheets to move toward a side away from the reeling component 2; the punching component comprises a first hydraulic press 3, the movable portion of which is fixedly connected to a punching upper die 5 by screws, and a punching lower die 6 is also provided on the top of the machine body 1, and the front sides of the punching upper die 5 and the punching lower die 6 are both configured as serrated structures. The conveying component is used to deliver the blank obtained after slicing to the stamping component, and use the stamping component to stamp and form the blank to obtain the finished easy-open lid. The conveying component and the stamping component are both mature existing technologies and have realized automated processing. Both are not shown in the figure.

[0047] In this embodiment, a punching component is provided to punch out the released aluminum coil into aluminum sheets of equal size, and the mold for punching out the aluminum coil is provided with a serrated structure on one side, so that aluminum sheets with serrated edges can be punched out. The protruding parts of the sheets of this shape at the outermost edges on the front and rear sides can be used to cut out complete circular pieces, thereby reducing the area of ​​the unpunched parts on the front and rear sides of each aluminum sheet, thereby reducing the amount of aluminum waste.

[0048] During operation, the unwinding component 2 is used to release the aluminum coil, and the released aluminum coil is pulled backward by the moving component. During the process, it passes through the punching component, stress relief component and sheet opening component in turn, and finally the waste is sent out from the rear end of the machine body 1; specifically, when the aluminum sheet is pulled to the set position, stamping begins, and the first hydraulic press 3 works to push the punching upper die 5 downward and cooperate with the punching lower die 6 to punch out the aluminum sheet from the aluminum coil. Since the punching lower die 6 has a serrated structure on one side, the tailoring position of the aluminum sheet is serrated, so that the round piece at the edge can be printed on the serrated protrusion, thereby not causing waste of material at the tailoring position, and its final punching effect is as follows Figure 14 As shown in the figure, it can be seen that the material waste at the tailoring position is significantly reduced; since the aluminum coil is cut into pieces, the operation is more flexible, the aluminum movement can be controlled precisely, and the stress of a small piece of aluminum sheet is easier to eliminate.

[0049] The stress relief component is arranged in the middle of the body 1, that is, after punching, it can eliminate the internal stress of the material to be cut, and on the other hand avoid stress accumulation on the aluminum coil; after the stress is eliminated, the aluminum sheet passes through the cutting component and is punched to obtain a round sheet-shaped easy-open cover blank.

[0050] Example 2

[0051] On the basis of Example 1, the present invention provides a technical solution: preferably, the sheet-opening component includes a second hydraulic press 4, the movable part of the second hydraulic press 4 is fixedly connected to the upper sheet-opening mold 36 by screws, the machine body 1 is located below the upper sheet-opening mold 36 and is fixedly installed with a lower sheet-opening mold 42, the movable part of the second hydraulic press 4 is also fixedly connected to a mounting ring 37, and six through holes are equidistantly provided in a ring shape on the mounting ring 37, each of the through holes is slidably connected to a pressure rod 38, and a limiting ring 41 is fixedly connected between the tops of the pressure rods 38, The bottom of the pressure rod 38 is fixedly connected to the pressure head 39, and the outside of the pressure rod 38 and between the mounting ring 37 and the pressure head 39 are sleeved with a first spring 40, and the pressure head 39 is a flexible block; the sheet opening component also includes a servo module 43, and the movable part of the servo module 43 is fixedly connected to the mobile platform 46, and multiple groups of moving parts are provided on the body 1 and the mobile platform 46; a discharge trough 44 is provided on the top of the body 1, and the bottom of the lower sheet opening mold 42 is opposite to the discharge trough 44, and the inside of the discharge trough 44 is fixedly connected to a guide plate 45.

[0052] The solution requires continuous punching out of discs, and the solid part of the aluminum sheet gradually decreases during the punching process, which reduces its supporting strength and reduces the stability of the aluminum sheet during the subsequent stamping process. It is necessary to compact the aluminum sheet before stamping.

[0053] In this embodiment, a pressing head 39 is provided that can move synchronously with the upper sheet mold 36. In the initial state, the pressing head 39 is located below the upper sheet mold 36 under the action of the first spring 40. During the downward movement of the upper sheet mold 36, the pressing head 39 will contact and press the aluminum sheet in advance, thereby fixing the aluminum sheet. There are multiple pressing heads 39, which can be fully fixed around the punched position.

[0054] During operation, the upper die 36 is controlled to descend, causing the mounting ring 37 to descend accordingly. The first spring 40 pushes the ram 39 downward until it contacts the aluminum sheet. The first spring 40 begins to compress, and under the elastic force of the first spring 40, the ram 39 presses against the aluminum sheet until the upper die 36 completes the stamping of the aluminum sheet, thus cutting out the blank. This fixing process does not require special control; it occurs automatically during the stamping process, thus not affecting processing efficiency. After being stamped out, the blank falls onto the guide plate 45 and falls out along the guide plate 45. It is then fed into an external secondary stamping device for stamping into the desired easy-open lid.

[0055] During the stamping process of the blank, the aluminum sheet is controlled by the servo module 43 and the moving parts installed on the moving platform 46 to move in two horizontal directions perpendicular to each other, thereby achieving the adjustment of the stamping position.

[0056] Six punches 39 are provided, each positioned according to the following principle: one point is the center of gravity of a triangle formed by connecting the centers of three adjacent discs. The remaining points are arranged in a circular array with reference to the center of the circle, starting from this center, at intervals of sixty degrees. These points are positioned precisely in the gaps between adjacent punching positions, i.e., solid areas, ensuring stable fixation. Furthermore, even overextrusion will not affect the punching position. It should be noted that the edges of the punches 39 may be partially hollowed out, but this does not affect normal operation.

[0057] Preferably, the moving parts include a motor 16, a transmission structure 17 and several conveying roller groups; the conveying roller group includes a mounting frame 10, a feed roller 15, a screw 12, an adjusting block 13 and a driven roller 14, the feed roller 15 is rotatably connected between the inner sides of the mounting frame 10, and the two sides of the mounting frame 10 are symmetrically provided with adjusting slots 11, the top of the adjusting slot 11 is provided with a screw hole, the screw 12 is threadedly connected to the screw hole, the top of the screw 12 has a screw head, the bottom of the screw 12 is rotatably connected to the adjusting block 13, the adjusting block 13 is slidably connected to the adjusting slot 11, and the driven roller 14 is rotatably connected to the side close to the two adjusting blocks 13; one end of the central axis of the feed roller 15 extends to the outside of the mounting frame 10 and is connected thereto by a transmission structure 17, the motor 16 is connected to the transmission structure 17, and when the motor 16 is working, it drives each feed roller 15 to rotate synchronously through the transmission structure 17.

[0058] In this embodiment, after unwinding, the aluminum coil is conveyed by a pair of rollers consisting of a feed roller 15 and a driven roller 14. The aluminum sheet is positioned between the feed rollers 15 and the driven rollers 14, and the aluminum sheet is tightly adhered to both. During feeding, the motor 16 operates, driving the feed rollers 15 to rotate via the transmission structure 17, transporting the aluminum sheet rearward. Before the motor 16 operates, the screw 12 is rotated to move vertically, thereby driving the adjustment block 13 and the driven rollers 14 to move vertically, thereby adjusting the distance between the driven rollers 14 and the feed rollers 15. The driven rollers 14 and 15 are first controlled to move away from each other. After the aluminum sheet passes, the driven rollers 14 are then adjusted to move closer to the feed rollers 15 until the feed rollers 15 squeeze the aluminum sheet. It can also adapt to the transportation of aluminum sheets of different thicknesses. Correspondingly, the molds in the above-mentioned punching parts and the opening parts are installed by screws, and different models of molds can be replaced to adapt to the processing of different easy-open lids.

[0059] Among them, the transmission structure 17 can be a plurality of sprockets connected by the same chain transmission, each sprocket is fixedly connected to the central axis of a feed roller 15, and the center of one of the sprockets is fixedly connected to the output end of the motor 16; the transmission structure 17 can also be a plurality of driving bevel gears and a plurality of driven bevel gears, all driving bevel gears are located on the same rotating shaft, and the rotating shaft is fixedly connected to the output end of the motor 16, each driven bevel gear is fixedly connected to the central axis of a feed roller 15, and each driving bevel gear is meshed with a driven bevel gear; it can also be other structures that can realize the synchronous rotation of each feed roller 15 controlled by the motor 16.

[0060] Example 3

[0061] On the basis of Example 2, the present invention provides a technical solution: preferably, the top of the body 1 is symmetrically fixedly connected with two mounting columns 8, the top of the mounting columns 8 is fixedly connected with a limiting block, the punching lower die 6 is slidably connected between the two mounting columns 8, and the outside of the mounting columns 8 is located below the punching lower die 6 and is sleeved with a second spring 9, the side of the punching lower die 6 away from the serrations is also fixedly connected with a conveying roller group, and one side of the adjusting block 13 in the conveying roller group connected to the punching lower die 6 is fixedly connected with a linkage frame 18, and both sides of the punching upper die 5 are fixedly connected with linkage blocks 19, and the top of the body 1 is fixedly connected with a support block 7 in contact with the punching lower die 6, and the side of the support block 7 close to the punching lower die 6 is provided with serrations that engage with the punching lower die 6.

[0062] In the process of punching the aluminum coil into aluminum sheets, since the mold cannot cover the entire aluminum sheet, if the punching is performed directly, a certain shear force will be generated on the side of the punching upper die 5 away from the serrations, which will cause cutting marks on the side of the punching upper die away from the serrations, affecting the subsequent sheeting effect;

[0063] In this embodiment, when the punching upper die 5 contacts the top of the aluminum sheet, the punching lower die 6 actively moves downward with the punching lower die 6 to provide space, instead of moving downward by squeezing the aluminum sheet, so that the aluminum sheet will not be severely squeezed during the punching process, thereby reducing damage to the aluminum sheet.

[0064] During operation, the upper punching die 5 moves downward. When the upper punching die 5 contacts the top of the aluminum sheet, the linkage block 19 contacts the linkage frame 18 at the same time. That is to say, during the punching process, the lower punching die 6 is directly subjected to the downward thrust of the upper punching die 5, causing the lower punching die 6 to move downward and squeeze the second spring 9. After the punching is completed, the upper punching die 5 is controlled to reset, and the lower punching die 6 is reset under the rebound of the second spring 9, thereby avoiding cutting marks on the middle part of the aluminum sheet.

[0065] That is to say, the conveying roller group is divided into three groups, one group is directly installed on the machine body 1 and remains fixed; another group is installed on the movable platform 46 and can move horizontally therewith; the last group is installed on the lower punching die 6 and can move up and down therewith.

[0066] Example 4

[0067] Based on Example 3, the present invention provides a technical solution: Preferably, the stress relief component includes two side panels 20 fixedly connected to the top of the body 1, a through groove is opened in the middle of the side panel 20, a slide rod 21 is fixedly connected between the top and bottom of the inner wall of the through groove, the outside of the slide rod 21 is slidably connected to a follower block 22, an auxiliary roller 24 is rotatably connected between the two adjacent sides of the follower blocks 22, and an auxiliary roller 24 is also rotatably connected between the two adjacent sides of the side panels 20, and a third spring 23 is sleeved on the outside of the slide rod 21 and located above the follower block 22.

[0068] After the aluminum coil is unwound, stress exists inside the material, causing the material to bend and difficult to flatten, which in turn affects the subsequent sheet conveying and stamping process. Although it is directly straightened during the unwinding process, the continuous straightening process will concentrate the stress toward the aluminum coil.

[0069] In this embodiment, a stress relief component is provided behind the punching component. In the process, the aluminum coil is first punched, and then the cut sheet is stress-straightened, so as to eliminate the stress in the sheet without concentrating the stress on the aluminum coil. Specifically, the aluminum sheet passes through the auxiliary roller 24 during transportation. Due to the elastic force of the third spring 23 on the follower block 22, the auxiliary roller 24 exerts a certain extrusion force on the aluminum sheet. During the traction process of the aluminum sheet, it will be straightened by the above-mentioned auxiliary roller 24, and the stress will also be released at the end of the aluminum sheet.

[0070] Example 5

[0071] On the basis of Example 4, the present invention provides a technical solution: preferably, the side away from the side plate 20 is fixedly connected to a fixed plate 25, and one side of the fixed plate 25 is fixedly connected to a retarder 26, and a limiting flow hole 28 is provided on the retarder 26. A piston plate 27 is slidably connected between the inner walls of the retarder 26, and a connecting rod 32 is fixedly connected to the piston plate 27. The end of the connecting rod 32 away from the piston plate 27 passes through the fixed plate 25 and is fixedly connected to a transmission frame 34. The connecting rod 32 is slidably connected to the fixed plate 25, and both ends of the central axis of the auxiliary roller 24 extend to the other side of the follower block 22 and are fixedly connected to a turntable 33. The side of the turntable 33 away from the auxiliary roller 24 is fixedly connected to a transmission pin 35, and the transmission pin 35 contacts the inner wall of the transmission frame 34.

[0072] When the aluminum sheet passes through the auxiliary roller 24, the auxiliary roller 24 rotates along with the movement of the aluminum sheet.

[0073] In this embodiment, a speed-limiting structure is provided for the auxiliary rollers 24 so that when the aluminum sheet is pulled and passes between the two auxiliary rollers 24, the rotation speed of the auxiliary rollers 24 cannot keep up with the feed roller 15. The two auxiliary rollers 24 and the aluminum sheet roll relative to each other and slide at the same time, thereby generating resistance (friction generated by relative sliding) to the aluminum sheet passing behind, thereby straightening the aluminum sheet.

[0074] Assuming that the rotational speed of the auxiliary roller 24 is v1, and the rotational speeds of the driven roller 14 and the feed roller 15 are both v2, then v2>v1. During the transportation process, the aluminum sheet slides relative to the auxiliary roller 24 and generates friction, which means that the aluminum sheet will be straightened between the side plate 20 and the mounting frame 10.

[0075] During operation, when the aluminum sheet passes through the auxiliary roller 24, it drives the auxiliary roller 24 to rotate. The auxiliary roller 24 drives the turntable 33 to rotate through the central axis, and the transmission pin 35 then revolves around the center of the turntable 33. On the one hand, the transmission pin 35 slides relative to the inner wall of the transmission frame 34, and on the other hand, it drives the transmission frame 34 to reciprocate, and drives the piston plate 27 to reciprocate through the connecting rod 32. During this process, air is continuously pumped in and out through the flow-limiting hole 28. By limiting the aperture of the flow-limiting hole 28, the air flow rate of the flow-limiting hole 28 can be limited, thereby limiting the movement speed of the piston plate 27. Further, the movement speed of the transmission frame 34 and the connecting rod 32 is limited, thereby hindering the rotation speed of the turntable 33 and the transmission pin 35. Under the action of the above-mentioned transmission frame 34, the upper and lower transmission pins 35 move synchronously, thereby causing the upper and lower auxiliary rollers 24 to rotate synchronously.

[0076] Preferably, a hollow stud 29 communicating with the flow limiting hole 28 is fixedly connected to the retarder cylinder 26 , an air valve cap 30 is connected to the outer thread of the hollow stud 29 , and a strip groove 31 is formed on the hollow stud 29 .

[0077] In this embodiment, a hollow stud 29 is provided at the location of the flow limiting hole 28, and a strip groove 31 is opened on the hollow stud 29. When the gas valve cap 30 covers the hollow stud 29 to varying degrees, the strip groove 31 is also blocked to varying degrees, so that the size of the area for gas exchange with the outside through the strip groove 31 changes, thereby realizing the adjustment of the gas flux through the strip groove 31 to adapt to different conveying speeds.

[0078] Preferably, the diameter of the lower portion of the die hole of the lower sheet mold 42 is larger than that of the upper portion.

[0079] In this embodiment, the blank is separated from the die hole of the lower sheet-cutting die 42 after being punched out, so as to avoid friction hindering the blank from falling and causing material jamming.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A punching and forming device for an easy-open lid, comprising a body (1), a punching and forming component and a conveying component; characterized in that: Also includes: An unwinding component (2) is arranged at the front end of the machine body (1) and is used to release the aluminum coil; A blanking component, mounted on the front of the machine body (1), for cutting the released aluminum coil into aluminum sheets of the same size; A sheeting component, mounted on the rear portion of the machine body (1), for prefabricating the sheet material into discs of the same shape; A stress relief component, mounted in the middle of the body (1), for relieving stress of the aluminum coil; A moving component for controlling the aluminum sheet to move toward a side away from the unwinding component (2); The punching component comprises a first hydraulic press (3), the movable portion of the first hydraulic press (3) being fixedly connected to a punching upper die (5) via screws, a punching lower die (6) being further provided on the top of the machine body (1), and the front sides of the punching upper die (5) and the punching lower die (6) being both provided with a serrated structure; The sheet-opening component includes a second hydraulic press (4), the movable portion of the second hydraulic press (4) is fixedly connected to the upper sheet-opening mold (36) by screws, and the machine body (1) is located below the upper sheet-opening mold (36) and is fixedly installed with a lower sheet-opening mold (42); the sheet-opening component also includes a servo module (43), the movable portion of the servo module (43) is fixedly connected to the moving platform (46), and multiple groups of moving components are provided on the machine body (1) and the moving platform (46); a discharge trough (44) is provided on the top of the machine body (1), the bottom of the lower sheet-opening mold (42) is opposite to the discharge trough (44), and a guide plate (45) is fixedly connected inside the discharge trough (44); The moving parts include a motor (16), a transmission structure (17) and a plurality of conveying roller groups; The stress relief component includes two side plates (20) fixedly connected to the top of the body (1), a through slot is opened in the middle of the side plates (20), a slide rod (21) is fixedly connected between the top and bottom of the inner wall of the through slot, the outside of the slide rod (21) is slidably connected to a follower block (22), an auxiliary roller (24) is rotatably connected between the two adjacent sides of the follower blocks (22), and an auxiliary roller (24) is also rotatably connected between the two adjacent sides of the side plates (20), and a third spring (23) is sleeved on the outside of the slide rod (21) and located above the follower block (22); The side of the side plate (20) away from the side plate (20) is fixedly connected to a fixed plate (25), and the side of the fixed plate (25) is fixedly connected to a retarder (26), and a limited flow hole (28) is provided on the retarder (26). A piston plate (27) is slidably connected between the inner walls of the retarder (26), and a connecting rod (32) is fixedly connected to the piston plate (27). The end of the connecting rod (32) away from the piston plate (27) passes through the fixed plate (25) and is fixedly connected to a transmission frame (34). The connecting rod (32) is slidably connected to the fixed plate (25). Both ends of the central axis of the auxiliary roller (24) extend to the other side of the follower block (22) and are fixedly connected to a turntable (33). The turntable (33) is fixedly connected to a transmission pin (35) on the side away from the auxiliary roller (24), and the transmission pin (35) contacts the inner wall of the transmission frame (34). A hollow stud (29) communicating with the flow limiting hole (28) is fixedly connected to the retarder (26), an air nozzle cap (30) is externally threadedly connected to the hollow stud (29), and a strip groove (31) is formed on the hollow stud (29).

2. The easy-open lid stamping and forming equipment according to claim 1, characterized in that: The movable part of the second hydraulic press (4) is also fixedly connected to a mounting ring (37), and the mounting ring (37) is provided with six through holes in an annular shape and at equal intervals. A pressure rod (38) is slidably connected inside each through hole. A limiting ring (41) is fixedly connected between the tops of the pressure rods (38), and a pressure head (39) is fixedly connected to the bottoms of the pressure rods (38). A first spring (40) is sleeved outside the pressure rods (38) and between the mounting ring (37) and the pressure head (39). The pressure head (39) is a flexible block.

3. The easy-open lid stamping and forming equipment according to claim 2, characterized in that: The conveying roller group comprises a mounting frame (10), a feeding roller (15), a screw (12), an adjusting block (13) and a driven roller (14), wherein the feeding roller (15) is rotatably connected between the inner sides of the mounting frame (10), and the mounting frame (10) is symmetrically provided with adjusting slots (11) on both sides, and a screw hole is provided at the top of the adjusting slot (11), and the screw (12) is threadedly connected to the screw hole, and the top of the screw (12) has a screw head, and the bottom of the screw (12) is connected to the adjusting slot (11). The blocks (13) are rotatably connected, the adjusting block (13) is slidably connected to the adjusting slot (11), and the driven roller (14) is rotatably connected to the side where the two adjusting blocks (13) are close to each other; one end of the central axis of the feeding roller (15) extends to the outside of the mounting frame (10) and is connected to each other through a transmission structure (17), and the motor (16) is connected to the transmission structure (17). When the motor (16) is working, it drives each feeding roller (15) to rotate synchronously through the transmission structure (17).

4. The easy-open lid stamping and forming equipment according to claim 3, characterized in that: The top of the machine body (1) is symmetrically fixedly connected to two mounting columns (8), the top of the mounting columns (8) is fixedly connected to a limit block, the punching lower die (6) is slidably connected between the two mounting columns (8), the outside of the mounting columns (8) is located below the punching lower die (6) and is sleeved with a second spring (9), the side of the punching lower die (6) away from the saw teeth is also fixedly connected to a conveying roller group, the adjusting block (13) in the conveying roller group is fixedly connected to a linkage frame (18), both sides of the punching upper die (5) are fixedly connected to linkage blocks (19), the top of the machine body (1) is fixedly connected to a support block (7) in contact with the punching lower die (6), and the side of the support block (7) close to the punching lower die (6) is provided with saw teeth that engage with the punching lower die (6).

5. The easy-open lid stamping and forming equipment according to claim 4, characterized in that: The lower portion of the die hole of the lower sheet-opening die (42) has a larger hole diameter than the upper portion.

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