A tinplate shearing device

Abstract

The application discloses a metal tinned sheet shearing device and relates to the technical field of food packaging production. The nylon chain plate is provided around the disc shearing roller, when the strip reaches the adsorption position close to the shearing mechanism, the strip is adsorbed on the nylon chain plate, the feeding speed of the strip is ensured, tearing and deformation at the shearing position caused by different motion steps are avoided, meanwhile, due to the adsorption of the electromagnet, the part of the front end of the strip that has been cut is prevented from drooping due to the influence of gravity, the contact angle between the cut part of the strip and the disc shear is prevented from changing, burrs and collapsed shoulders on the cut end surface are prevented from appearing, and the stacking of the can body piece and the subsequent coiling processing are prevented from being affected.

Description

Technical Field

[0001] This invention relates to the field of food packaging production technology, specifically to a shearing device for tin-plated sheet metal. Background Technology

[0002] Tinplate, also known as tinplate, is widely used in food packaging such as canned food containers, beverage cans, and milk powder cans due to its excellent corrosion resistance, machinability, and aesthetics. When processing these cans, the steel coil is first stamped and cut into rectangular sheets according to specifications. Then, it undergoes color printing and other surface treatments. After that, the printed rectangular sheets are cut into strips, which are then cut again to obtain can body sheets. Finally, the stacked can body sheets are transported to rolling and welding equipment to process the cans.

[0003] When tin-plated steel sheets are pushed into the disc shear by a chain-driven feeding mechanism, a low-speed feeding is used to ensure stable delivery of the strip to the disc shear. This results in the feeding mechanism's speed being significantly lower than the disc shear's rotational speed. Since the disc shear's speed is faster than the feeding mechanism's, the sheet material is rapidly dragged forward by the disc shear. When the sheet material's moving speed suddenly increases, it is prone to slippage in the shearing area, leading to larger burrs on the sheared surface and unstable shearing results. Simultaneously, due to the dragging effect of the disc shear, after the sheet material is sheared into multiple can-shaped pieces and separated from the disc shear, these pieces will fly forward due to inertia. When these can-shaped pieces come into contact with the unloading mechanism and other can-shaped pieces, friction occurs between them and the unloading chute. This causes burrs on the sheared edge to rub against other parts, scratching the tin plating layer on other workpiece surfaces. Summary of the Invention

[0004] The purpose of this invention is to provide a metal tin-plated sheet shearing device to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a metal tin-plated sheet shearing device, comprising a transport mechanism, the transport mechanism including a frame and a platform, a shearing mechanism being provided at one end of the frame, the shearing mechanism including two vertically arranged disc shearing rollers, and further comprising: an auxiliary mechanism including multiple sets of nylon chain plates, both sides of the nylon chain plates being covered with side plates, the middle of the side plates being rotatably mounted on the disc shearing rollers, an electromagnet being fixedly connected to the inner side of the nylon plate of the nylon chain plate, and two triggering elements being fixedly connected to the inner side of the side plate, the triggering elements controlling the start and stop of the electromagnets, the nylon chain... One end of the plate is located directly above the platform. A fixed frame is fixedly connected to the outer side of the side plate, and a ferromagnetic block is set on the bottom surface of the fixed frame inside the nylon chain plate. A vertical slide is fixedly connected to the bottom surface of the fixed frame, and a pressure rod is slidably connected inside the vertical slide. When the electromagnet is below the ferromagnetic block, it attracts the ferromagnetic block to drive the pressure rod to slide upward. A pulling block is rotatably installed on the rotation axis of the pressure rod. When the pressure rod is at the bottom, it is in a vertical state. When it is close to the end of the upward stroke, it rotates to a horizontal state. When the pressure rod starts to slide downward, it is in a horizontal state. When it is close to the end of the downward stroke, it rotates to a vertical state.

[0006] Preferably, the electromagnets inside the nylon chain plate are divided into multiple magnet groups, and the nylon plates between two adjacent magnet groups are not fixedly connected to the electromagnets, and the electromagnets in the magnet groups start and stop synchronously.

[0007] Preferably, the two triggering elements are located on both sides of the disc shearing roller, with the one above the platform being the start trigger and the one near the auxiliary mechanism being the stop trigger. The magnet group switches to the corresponding start / stop state after activating the triggering element.

[0008] Preferably, the vertical slide frame includes a first vertical plate and a second vertical plate. The side of the second vertical plate is provided with a vertical sliding groove, and the inner side of the first vertical plate is provided with a first sliding groove and a second sliding groove. A sliding shaft is slidably connected in the vertical sliding groove. A rotating disk is fixedly sleeved on the sliding shaft. A pressure rod is fixedly sleeved on the sliding shaft. A sliding column is fixedly connected to the side of the rotating disk. The sliding shaft is slidably connected in the first sliding groove, and the sliding column is slidably connected in the second sliding groove. The depth of the second sliding groove is greater than that of the first sliding groove. The pulling block is slidably connected between the first vertical plate and the second vertical plate.

[0009] Preferably, the pulling block and the ferromagnetic block are connected by a rope, which passes through the fixing frame and is guided by guide rollers inside the fixing frame.

[0010] Preferably, the rear end of the frame is provided with a feeding mechanism, which includes symmetrical linear guide rails fixedly connected to the top surface of the frame. A crossbar is connected to the slider of the symmetrical linear guide rails, and a picking cylinder is connected to the crossbar. A picking frame is fixed to the telescopic end of the picking cylinder, and a suction cup is fixedly provided on the picking frame. A feeding platform is provided below the suction cup, and the feeding platform is a lifting platform.

[0011] Preferably, a motor that drives the slider of one of the linear guides is fixedly connected to one side, a conveyor chain is provided inside the loading platform, and the loading mechanism places the workpiece on the loading platform and then pushes it toward the shearing mechanism by the conveyor chain.

[0012] Preferably, the shearing mechanism further includes symmetrical drive brackets, the disc shearing roller is rotatably mounted between the two drive brackets, the drive shaft of the nylon chain plate is rotatably mounted between the two drive brackets, and a drive mechanism is provided in the drive bracket to make the disc shearing roller and the drive shaft of the nylon chain plate rotate synchronously.

[0013] Preferably, the front end of the frame is provided with a receiving mechanism, which includes a receiving platform and a partition frame slidably connected thereon. The receiving platform is a lifting platform, and the partition frame is located below the auxiliary mechanism. After the partition frame moves up, it is fixed and cannot slide.

[0014] Preferably, a controller is provided on one side of the shearing mechanism, and the controller is electrically connected to the electromagnet and the triggering element.

[0015] In the above technical solution, the present invention provides a metal tin-plated sheet shearing device. A nylon chain plate is positioned around the disc shearing roller. When the strip reaches the adsorption position near the shearing mechanism, it is adsorbed onto the nylon chain plate. Because the nylon chain plate moves synchronously with the disc shearing roller, the feeding speed of the strip is ensured, avoiding problems such as tearing and deformation at the shearing point due to asynchronous movement. Simultaneously, due to the adsorption of the electromagnet, the pre-cut portion of the strip is prevented from drooping due to gravity, thus preventing changes in the contact angle between the cut strip and the disc shear. This, in turn, leads to burrs and shoulders on the cut end face, affecting the stacking of can sheet and subsequent rolling processing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1This is a schematic diagram of the overall structure of a metal tin-plated sheet shearing device according to the present invention.

[0018] Figure 2 This is a schematic diagram of the transport mechanism structure of a metal tin-plated sheet shearing device according to the present invention;

[0019] Figure 3 This is a schematic diagram of the feeding mechanism of a metal tin-plated sheet shearing device according to the present invention;

[0020] Figure 4 This is a schematic diagram of the shearing mechanism, auxiliary mechanism and receiving mechanism of a metal tin-plated sheet shearing device according to the present invention.

[0021] Figure 5 This is a schematic diagram of the internal structure of the nylon chain plate, an auxiliary mechanism of a metal tin-plated sheet shearing device according to the present invention.

[0022] Figure 6 This is a schematic diagram of the auxiliary mechanism of a metal tin-plated sheet shearing device according to the present invention.

[0023] Figure 7 This is a schematic diagram of the vertical slide structure of a metal tin-plated sheet shearing device according to the present invention;

[0024] Figure 8 This is a schematic diagram of the structure of the vertical slide of the metal tin-plated sheet shearing device of the present invention for removing the first vertical plate;

[0025] Figure 9 This is a schematic diagram of the inner side of the first vertical plate of a metal tin-plated sheet shearing device according to the present invention.

[0026] Explanation of reference numerals in the attached drawings: 1. Transport mechanism; 11. Frame; 12. Platform; 13. Conveyor chain; 2. Feeding mechanism; 21. Feeding platform; 22. Linear guide rail; 23. Picking cylinder; 24. Suction cup; 25. Motor; 3. Shearing mechanism; 31. Drive bracket; 32. Disc shearing roller; 4. Auxiliary mechanism; 41. Nylon chain plate; 42. Side plate; 43. Vertical slide; 431. First vertical plate; 432. Second vertical plate; 433. Vertical slide groove; 434. Sliding shaft; 435. Pressure rod; 436. Rotating disk; 437. Sliding column; 438. Pulling block; 439. First slide groove; 4310. Second slide groove; 44. Electromagnet; 45. Fixing frame; 46. Rope; 47. Ferromagnetic block; 48. Triggering element; 5. Receiving mechanism; 51. Receiving platform; 52. Separator; 6. Controller. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] like Figures 1 to 9 As shown, the metal tin-plated sheet shearing device of this embodiment includes a transport mechanism 1, which includes a frame 11 and a platform 12. A shearing mechanism 3 is provided at one end of the frame 11. The shearing mechanism 3 includes two circular shearing rollers 32 arranged vertically. It also includes:

[0029] Auxiliary mechanism 4 includes multiple sets of nylon chain plates 41, each covered with a side plate 42. The width of the nylon chain plate 41 is smaller than the distance between the two disc shears on the disc shear roller 32. The middle part of the side plate 42 is rotatably mounted on the disc shear roller 32. An electromagnet 44 is fixedly connected to the inner side of the nylon plate 41, and two trigger elements 48 are fixedly connected to the inner side of the side plate 42. The trigger elements 48 control the start and stop of the electromagnet 44. One end is located directly above the platform 12. A fixed frame 45 is fixedly connected to the outer side of the side plate 42. A ferromagnetic block 47 is provided on the bottom surface of the fixed frame 45 inside the nylon chain plate 41. A vertical slide 43 is fixedly connected to the bottom surface of the fixed frame 45. A pressure rod 435 is slidably connected inside the vertical slide 43. An electromagnet 44 is located below the ferromagnetic block 47 and attracts the ferromagnetic block 47 to drive the pressure rod 435 to slide upward. A pulling block 438 is rotatably installed on the rotating shaft of the pressure rod 435.

[0030] When the lever 435 is at the bottom, it is in a vertical state. When it is near the end of the upward stroke, it rotates to a horizontal state. When the lever 435 begins to slide downward, it is in a horizontal state. When it is near the end of the downward stroke, it rotates to a vertical state.

[0031] In this invention, the nylon chain plate 41 located around the disc shearing roller 32, when the strip is being sheared, is pushed by the conveyor chain 13. When the strip reaches the adsorption position near the shearing mechanism 3 (i.e., the trigger activation position), the trigger element 48 directly above the strip is activated by the trigger block of the internal magnet group, thereby opening the magnet group. At this time, the strip located below the magnet group is adsorbed onto the nylon chain plate 41, and as the nylon chain plate 41 moves, the strip enters between the two disc shearing rollers 32. The strip is cut into multiple can body pieces, ensuring that the feeding speed of the strip is the same as the rotation speed of the disc shearing roller 32, avoiding problems such as tearing and deformation at the shearing point due to asynchronous movement. Since the strip remains attached to the nylon chain plate 41 during shearing, the stability of the strip is improved during shearing, preventing the strip tip from drooping due to gravity after being cut, which would cause a change in the contact angle between the cut strip and the disc shear, resulting in burrs and shoulders on the cut end face, affecting the stacking of can body pieces and subsequent rolling processing.

[0032] The pressure rod 435, which slides and rotates up and down within the vertical slide 43, attracts the ferromagnetic block 47 when the magnet group approaches it, causing the ferromagnetic block 47 to move towards the electromagnet 44. This pulls the pulling block 438 upward, which in turn moves the pressure rod 435 within the vertical slide 43. When the pressure rod 435 slides to the highest point of the first slide groove 439, it rotates from a vertical to a horizontal position under the guidance of the second slide groove 4310, positioning it above the top surface of the can plate. After the magnet group triggers the closing trigger, the magnet group closes, and the can plate is no longer attracted and falls downward. The pressure rod 435 then moves downward under its own weight, pressing down on the can plate. This replaces the parabolic motion of the can plate leaving the shearing mechanism 3 with a downward vertical motion, preventing friction between the can plate and the lower can plate due to sliding, which could damage the surface coating of the can plate.

[0033] The electromagnets 44 inside the nylon chain plate 41 are divided into multiple magnet groups. The nylon plates between two adjacent magnet groups are not fixedly connected to the electromagnets 44. The electromagnets 44 in the magnet group start and stop synchronously. The two trigger elements 48 are located on both sides of the disc shearing roller 32. The one above the platform 12 is the start trigger, and the one near the auxiliary mechanism 4 is the stop trigger. After the magnet group activates the trigger element 48, it switches to the corresponding start and stop state.

[0034] The number of electromagnets 44 in the magnet group needs to be determined according to the length of the can body piece after the strip is cut. At the same time, the distance between the two magnet groups needs to be determined according to the feeding frequency of the feeding mechanism 2. The length of the nylon chain plate 41 also needs to be adjusted according to the actual situation of the workpiece.

[0035] like Figure 5 As shown, each magnet group has a trigger block on the side of the first electromagnet 44 to activate the trigger element 48. When the trigger block contacts the trigger element 48, the state of the magnet group is switched according to the trigger element 48. When the magnet group is above the platform 12 and triggers the opening trigger, the magnet group opens, thereby attracting the strip below to the bottom surface of the nylon chain plate 41. As the nylon chain plate 41 rotates, the attracted strip is transported between the two disc shearing rollers 32, so that the strip is cut into can body pieces. Due to the attraction of the electromagnet 44, when the strip is cut, its cut front end will not droop due to gravity. This causes a change in the contact angle and pressure distribution between the cut strip and the disc shear, ensuring that the feeding speed is synchronized with the rotational shearing speed of the disc shearing roller 32, reducing burrs and shoulders on the cut surface caused by asynchrony, and ensuring the quality of the cut edge.

[0036] The vertical slide 43 includes a first vertical plate 431 and a second vertical plate 432. A vertical sliding groove 433 is formed on the side of the second vertical plate 432. A first sliding groove 439 and a second sliding groove 4310 are formed on the inner side of the first vertical plate 431. A sliding shaft 434 is slidably connected within the vertical sliding groove 433. A rotating disk 436 is fixedly sleeved on the sliding shaft 434. A pressure rod 435 is fixedly sleeved on the sliding shaft 434. A sliding column 437 is fixedly connected to the side of the rotating disk 436. The movable shaft 434 is slidably connected in the first slide groove 439, and the slide column 437 is slidably connected in the second slide groove 4310. The depth of the second slide groove 4310 is greater than that of the first slide groove 439. The pulling block 438 is slidably connected between the first vertical plate 431 and the second vertical plate 432. The pulling block 438 and the ferromagnetic block 47 are connected by a rope 46. The rope 46 passes through the fixed frame 45 and is guided by the guide roller in the fixed frame 45. The rope 46 is inelastic and non-ferromagnetic.

[0037] A counterweight is connected to the bottom end of the pressure rod 435, which makes the mass of the pressure rod 435 greater than the mass of the ferromagnetic block 47. Thus, by default, the pressure rod 435 pulls the rope 46 by gravity, causing the top surface of the ferromagnetic block 47 to adhere to the bottom surface of the fixing frame 45.

[0038] like Figures 6 to 9As shown, after the strip is sheared into can body pieces by the disc shearing roller 32, as the nylon chain plate 41 continues to move, when the foremost magnet group approaches the ferromagnetic block 47, the ferromagnetic block 47 is attracted and moves downward. The rope 46 pulls the pulling block 438 upward. This upward movement of the pulling block 438 causes the sliding shaft 434 to move upward, thus causing the sliding column 437 to slide within the second slide groove 4310. When the sliding shaft 434 moves upward, causing the sliding column 437 to slide from the straight section of the second slide groove 4310 to the top arc section, the rotating disk 436 rotates, thereby causing the sliding shaft 434 to rotate, which in turn causes the pressure rod 435 to rotate. As the sliding shaft 434 slides to the top of the first slide groove 439, the sliding column 437 rotates from being directly above the sliding shaft 434 to being on the horizontal side of the sliding shaft 434, thus causing the pressure rod 435 to rotate from a vertical state to a horizontal state. At this time, the front end of the pressure rod 435 is located above the can piece. As the magnet group triggers the closing trigger, the magnet group is closed. At this time, the can piece below falls downward due to the loss of attraction from the electromagnet 44. At the same time, due to the closure of the magnet group, the ferromagnetic block 47 is no longer attracted downward, so the pressure rod 435 slides down in the vertical slide 43. In the initial stage of sliding down, due to the limitation of the second slide 4310, the pressure rod 435 remains horizontal, thereby driving the can piece that has broken away from the adsorption state to move downward. Through the limitation of the vertical slide 43 and the separator 52, the parabolic motion of the can piece leaving the shearing mechanism 3 is replaced by the downward pressure of the pressure rod 435, so that the can piece falls vertically during the process of entering the receiving mechanism 5. This prevents the existing receiving device from rubbing against the previous can piece when receiving the parabolic can piece, which would cause wear on the tin plating layer on the surface of the can piece.

[0039] The state of the pressure rod 435 during movement: When the pressure rod 435 begins to move upward with the sliding shaft 434, the sliding column 437 is located on the right vertical part of the second sliding groove 4310, and the pressure rod 435 is in a vertical state. When the pressure rod 435 moves upward a certain distance, causing the sliding column 437 to begin entering the top arc section of the second sliding groove 4310 (at this time, the top height of the pressure rod 435 has passed the sheared tank piece), the pressure rod 435 rotates together with the rotating disk 436 and moves with the sliding shaft 434. 34 continues to move upward. Guided by the second slide groove 4310, the sliding column 437 causes the rotating disk 436 to rotate 90° relative to the initial state. At this time, the sliding column 437 enters the left side of the second slide groove 4310. When the electromagnet 44 is closed, causing the pressure rod 435 to slide down, the pressure rod 435 remains horizontal due to the limit of the second slide groove 4310. When the sliding column 437 enters the arc-shaped position below the second slide groove 4310, the pressure rod 435 rotates from the horizontal state back to its initial vertical state.

[0040] The rear end of the frame 11 is provided with a feeding mechanism 2. The feeding mechanism 2 includes symmetrical linear guide rails 22 fixedly connected to the top surface of the frame 11. A crossbar is connected to the slider of the symmetrical linear guide rails 22. A picking cylinder 23 is connected to the crossbar. A picking frame is fixed to the telescopic end of the picking cylinder 23. A suction cup 24 is fixedly installed on the picking frame. A feeding platform 21 is provided below the suction cup 24. The feeding platform 21 is a lifting platform. A motor 25 that drives the slider of one linear guide rail 22 is fixedly connected to one side. A conveyor chain 13 is provided in the loading platform 12. After the feeding mechanism 2 places the workpiece on the loading platform 12, it is pushed by the conveyor chain 13 to move towards the shearing mechanism 3.

[0041] like Figure 1 and Figure 3 As shown, when cutting the strip into can body pieces, the strip stack is first placed on the feeding platform 21, then the feeding platform 21 is controlled to rise, then the telescopic section of the picking cylinder 23 is controlled to extend, and the suction cup 24 picks up the strip on the strip stack. Then the slider of the linear guide 22 is controlled to move towards the shearing mechanism 3, and the suction cup 24 releases the strip, thereby realizing the feeding of the strip.

[0042] The shearing mechanism 3 also includes symmetrical drive brackets 31. The disc shearing roller 32 is rotatably mounted between the two drive brackets 31. The drive shaft of the nylon chain plate 41 is rotatably mounted between the two drive brackets 31. A drive mechanism is provided inside the drive bracket 31 to make the disc shearing roller 32 and the drive shaft of the nylon chain plate 41 rotate synchronously.

[0043] By making the disc shearing roller 32 rotate synchronously with the nylon chain plate 41, the feeding speed can be kept the same as the rotation speed of the disc shearing roller 32 when the feeding speed is lower than the shearing speed. This ensures that the feeding speed and the shearing speed are synchronized, thereby avoiding tearing and deformation at the shearing point caused by the difference between the feeding speed and the shearing speed of the existing feeding structure. It also prevents the plate from deviating or getting stuck.

[0044] The front end of the frame 11 is provided with a receiving mechanism 5, which includes a receiving platform 51 and a partition frame 52 slidably connected thereon. The receiving platform 51 is a lifting platform, and the partition frame 52 is located below the auxiliary mechanism 4. After the partition frame 52 moves up, it is fixed and cannot slide.

[0045] After the nylon chain plate 41 moves the cut can sheet to the receiving platform 51, it loses the attraction of the electromagnet 44 and is driven downward by the pressure rod 435, thus falling into the separator 52. This ensures that the can sheet falls vertically into the separator 52, preventing the can sheet from sliding and scratching the cut can sheet below after entering the separator 52.

[0046] Among them, a controller 6 is provided on one side of the shearing mechanism 3, and the controller 6 is electrically connected to the electromagnet 44 and the trigger element 48.

[0047] Working principle:

[0048] When using this invention to shear tin-plated steel sheets to produce can body sheets, the strip is first placed on the feeding platform 21. Then, the linear guide 22 is activated, causing its slider to move the picking cylinder 23 and the suction cup 24 to the strip stack. Subsequently, the telescopic end of the picking cylinder 23 extends so that the suction cup 24 picks up the top strip of the strip stack. Then, the picking cylinder 23 retracts and the slider of the linear guide 22 returns, thereby transporting the strip to the platform 12. Afterward, the strip is pushed towards the shearing mechanism 3 by the conveyor chain 13.

[0049] As the strip reaches the bottom of the nylon chain plate 41, the magnet assembly inside the nylon chain plate 41 opens after triggering the opening element 48, thereby attracting the strip to the bottom surface of the nylon chain plate 41. As the nylon chain plate 41 moves, the strip enters between the two disc shearing rollers 32 and is sheared into multiple can body pieces.

[0050] As the shearing is completed, the can body piece remains attached to the bottom surface of the nylon chain plate 41. As the nylon chain plate 41 moves, the magnet group that has attached the can body piece gradually approaches the trigger element 48 for triggering the closing. During the process of approaching the trigger element 48, the ferromagnetic block 47 is attracted by the magnet group and moves downward, thereby pulling the pressure rod 435 upward through the rope 46. During the upward movement, the pressure rod 435 rotates under the guidance of the second slide 4310, thus rotating from a vertical state to a horizontal state during the ascent. At this time, the pressure rod 435 is located above the can body piece.

[0051] When the magnet group triggers the closing trigger element 48, the magnet group is de-energized and shuts down, thus no longer attracting the can sheet. At this time, the pressure rod 435 slides down under its own weight. Under the limit of the second slide groove 4310, the pressure rod 435 is in a horizontal state in the first part of its descent, thus pushing the can sheet downward and causing the can sheet to move vertically downward. After that, the pressure rod 435 will rotate back to a vertical state through the guide of the second slide groove 4310 to complete the reset. The can sheet pushed down by the pressure rod 435 falls back into the separator 52 on the receiving platform 51 below. After the strip is cut, the cut can sheet can be taken out from the receiving mechanism 5.

[0052] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A tinplate shearing device, comprising a conveying mechanism (1), the conveying mechanism (1) comprising a frame (11) and a worktable (12), one end of the frame (11) being provided with a shearing mechanism (3), the shearing mechanism (3) comprising two disc shearing rollers (32) arranged in an upper and lower manner, characterized in that, Also includes: The auxiliary mechanism (4) includes multiple sets of nylon chain plates (41), both sides of which are covered with side plates (42). The middle of the side plates (42) is rotatably mounted on the disc shearing roller (32). An electromagnet (44) is fixedly connected to the inner side of the nylon plate of the nylon chain plate (41). Two triggering elements (48) are fixedly connected to the inner side of the side plates (42). The triggering elements (48) control the start and stop of the electromagnet (44). One end of the nylon chain plate (41) is located directly above the platform (12). A fixed frame (45) is fixedly connected to the outer side of the side plate (42). A ferromagnetic block (47) is provided on the bottom surface of the fixed frame (45) inside the nylon chain plate (41). A vertical slide (43) is fixedly connected to the bottom surface of the fixed frame (45). A pressure rod (435) is slidably connected inside the vertical slide (43). When the electromagnet (44) is located below the ferromagnetic block (47), it attracts the ferromagnetic block (47) to drive the pressure rod (435) to slide upward. A pulling block (438) is rotatably installed on the rotating shaft of the pressure rod (435). The pressure bar (435) is vertical when it is at the bottom, and rotates to a horizontal state when it is close to the end of the upward stroke. The pressure bar (435) is horizontal when it begins to slide downward, and rotates to a vertical state when it is close to the end of the downward stroke.

2. The metal tin-plated sheet shearing device according to claim 1, characterized in that, The electromagnets (44) inside the nylon chain plate (41) are divided into multiple magnet groups. The nylon plates between two adjacent magnet groups are not fixedly connected to the electromagnets (44). The electromagnets (44) in the magnet groups start and stop synchronously.

3. The metal tin-plated sheet shearing device according to claim 2, characterized in that, The two trigger elements (48) are located on both sides of the disc shearing roller (32). The one located above the platform (12) is the start trigger, and the one near the auxiliary mechanism (4) is the stop trigger. The magnet group switches to the corresponding start / stop state after activating the trigger element (48).

4. The metal tin-plated sheet shearing device according to claim 1, characterized in that, The vertical slide (43) includes a first vertical plate (431) and a second vertical plate (432). A vertical sliding groove (433) is provided on the side of the second vertical plate (432). A first sliding groove (439) and a second sliding groove (4310) are provided on the inner side of the first vertical plate (431). A sliding shaft (434) is slidably connected within the vertical sliding groove (433). A rotating disk (436) is fixedly sleeved on the sliding shaft (434). The pressure rod (435) is fixedly... The rotating disk (436) is fixedly connected to the sliding shaft (434), and the side of the rotating disk (436) is fixedly connected to the sliding column (437). The sliding shaft (434) is slidably connected in the first sliding groove (439), and the sliding column (437) is slidably connected in the second sliding groove (4310). The depth of the second sliding groove (4310) is greater than that of the first sliding groove (439). The pulling block (438) is slidably connected between the first vertical plate (431) and the second vertical plate (432).

5. The metal tin-plated sheet shearing device according to claim 1, characterized in that, The pulling block (438) and the ferromagnetic block (47) are connected by a rope (46), which passes through the fixing frame (45) and is guided by the guide rollers inside the fixing frame (45).

6. The metal tin-plated sheet shearing device according to claim 1, characterized in that, The rear end of the frame (11) is provided with a feeding mechanism (2). The feeding mechanism (2) includes symmetrical linear guide rails (22) fixedly connected to the top surface of the frame (11). A crossbar is connected to the slider of the symmetrical linear guide rails (22). A picking cylinder (23) is connected to the crossbar. A picking frame is fixed to the telescopic end of the picking cylinder (23). A suction cup (24) is fixedly provided on the picking frame. A feeding platform (21) is provided below the suction cup (24). The feeding platform (21) is a lifting platform.

7. The metal tin-plated sheet shearing device according to claim 6, characterized in that, A motor (25) for driving the slider is fixedly connected to one side of the linear guide (22). A conveyor chain (13) is provided inside the loading platform (12). After the loading mechanism (2) places the workpiece on the loading platform (12), it is pushed by the conveyor chain (13) to move towards the shearing mechanism (3).

8. The metal tin-plated sheet shearing device according to claim 1, characterized in that, The shearing mechanism (3) also includes symmetrical drive brackets (31). The disc shearing roller (32) is rotatably mounted between the two drive brackets (31). The drive shaft of the nylon chain plate (41) is rotatably mounted between the two drive brackets (31). A drive mechanism is provided inside the drive bracket (31) to make the disc shearing roller (32) and the drive shaft of the nylon chain plate (41) rotate synchronously.

9. The metal tin-plated sheet shearing device according to claim 1, characterized in that, The front end of the frame (11) is provided with a receiving mechanism (5). The receiving mechanism (5) includes a receiving platform (51) and a partition frame (52) slidably connected thereon. The receiving platform (51) is a lifting platform. The partition frame (52) is located below the auxiliary mechanism (4). After the partition frame (52) moves up, it is fixed and cannot slide.

10. A metal tin-plated sheet shearing device according to claim 1, characterized in that, A controller (6) is provided on one side of the shearing mechanism (3), and the controller (6) is electrically connected to the electromagnet (44) and the triggering element (48).

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