Cutting device for metal plate

Abstract

The invention belongs to the field of metal plate cutting, and particularly relates to a metal plate cutting device which comprises a base, two supporting frames are symmetrically and fixedly connected to the top of the base, a supporting plate is slidably connected between the two supporting frames, and a hydraulic cylinder is fixedly connected to the top of the base; according to the cutting device for the metal plate, through the arranged linkage assembly, the first support is connected with the second support, at the moment, the first support is controlled to move back, the second support and the grinding block can be driven to move along with the first support, the metal plate is ground through the grinding block, and burrs and burrs on the metal plate are removed; a second support drives a gear to move transversely while moving transversely, a rack is matched with the gear to drive a grinding block to rotate in the transverse moving process, the grinding block rotates while transversely rubbing the metal plate, and therefore the metal plate can be ground, and the metal plate can be ground conveniently. And the cleaning effect on burrs and burrs on the metal plate can be improved.

Description

Technical Field

[0001] This invention belongs to the field of sheet metal cutting, specifically a sheet metal cutting device. Background Art

[0002] Sheet metal is characterized by its light weight, high strength, electrical conductivity, low cost, and good performance in mass production. It is widely used in electronics, communications, automotive, and medical devices. For example, sheet metal is an essential component in computer cases, mobile phones, and MP3 players. As the application of sheet metal becomes increasingly widespread, its design has become a crucial part of product development. Mechanical engineers must be proficient in sheet metal design techniques to ensure that the designed sheet metal meets the product's functional and aesthetic requirements while also simplifying and reducing the cost of stamping die manufacturing. In the processing of sheet metal, cutting equipment is frequently used to separate the sheet metal.

[0003] A search revealed a Chinese patent (authorization announcement number CN215902825U) disclosing a sheet metal box cutting device. This patented technology includes a support plate, a connecting rod, and a limiting ring. A first support column is threaded into the internal part of the first support hole. This sheet metal box cutting device, through the setting of a supporting triangular plate and a second limiting groove, prevents the cutter from tilting. The cooperation between the connecting rod and the connecting square tube allows the cutter to move during use, achieving a wide cutting range. The protective long tube prevents cutting debris from flying. The cooperation between the first and second support columns allows both the first and second movable limiting long plates to move during use, achieving a good cutting effect.

[0004] However, after cutting sheet metal with a cutting blade, burrs and rough edges inevitably appear on the cut surface. Existing technology makes it inconvenient to process the cut surface of sheet metal in a timely manner after cutting. If the operator handles the cut sheet metal at this time, they are very likely to be cut by the burrs and rough edges on the cut surface. In addition, the sheet metal is relatively thin, and during the transverse cutting process, the cutting force will cause uneven stress on the sheet metal, resulting in bending or wavy patterns. Therefore, the present invention provides a sheet metal cutting device. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies and solve the problem that burrs and rough edges inevitably appear on the cut surface of sheet metal after cutting with a cutting blade, existing technologies do not allow for timely processing of the cut surface of sheet metal. If workers handle the cut sheet metal at this time, they are very likely to be cut by the burrs and rough edges on the cut surface. In addition, the sheet metal is relatively thin, and during the transverse cutting process, the cutting force will cause uneven stress on the sheet metal, resulting in bending or wavy patterns. This invention proposes a sheet metal cutting device.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: A sheet metal sheet cutting device of the present invention includes a base, two support frames symmetrically fixedly connected to the top of the base, a support plate slidably connected between the two support frames, a hydraulic cylinder fixedly connected to the top of the base, the output end of the hydraulic cylinder fixedly connected to the support plate, a motor fixedly connected to one side of the support plate, the output end of the motor extending into the interior of the support plate and fixedly connected to a lead screw, the lead screw rotatably connected to the support plate, a slider connected to the outer wall of the lead screw through a lead screw nut pair, the slider slidably connected to the support plate, a first bracket fixedly connected to the bottom of the slider, a cutting machine fixedly connected to the bottom of the first bracket, a slot opened on the top of the base and below the cutting machine, and a grinding assembly provided at the bottom of the support plate.

[0007] Preferably, the polishing assembly includes a second bracket, which is disposed at the bottom of the support plate and slidably connected to the support plate. A first rotating shaft is rotatably connected to the inner wall of the second bracket, and a polishing block is fixedly connected to one end of the first rotating shaft. A linkage assembly is provided between the first bracket and the second bracket.

[0008] Preferably, the linkage component includes a plug, which is fixedly installed on the outer wall of the second bracket. The first bracket has a slot inside, and the plug fits into the inner wall of the slot. A locking block is slidably connected to the inner wall of the first bracket. The bottom of the locking block extends into the inside of the slot and is sloped. A second spring is fixedly connected to the top of the locking block. The top of the second spring is fixedly connected to the first bracket. A slot for cooperating with the locking block is opened on the top of the plug. A reset unit is provided at the bottom of the support plate.

[0009] Preferably, the reset unit includes two fixing frames, which are symmetrically fixedly installed at the bottom of the support plate with the lead screw as the center. Fixing plates are fixedly connected to both sides of the second bracket, and the two fixing plates are slidably connected to the two fixing frames respectively. A first spring is sleeved on the outer wall of each of the two fixing frames. One end of the first spring is fixedly connected to the fixing frame, and the other end of the first spring is fixedly connected to the fixing plate. A mounting plate is fixedly connected to the bottom of the support plate, and a top plate is fixedly connected to the outer wall of the mounting plate. A through groove is opened on the outer wall of the first bracket, and the top plate fits against the inner wall of the through groove. An inclined groove that cooperates with the top plate is opened on the outer wall of the locking block.

[0010] Preferably, a connecting frame is fixedly connected to the bottom of the support plate, and a rack is fixedly connected to the bottom of the connecting frame. One end of the first rotating shaft passes through the second bracket and is fixedly connected to a gear, which meshes with the rack.

[0011] Preferably, the inner wall of the support plate is slidably connected with two sets of sliding shafts, the bottom of the sliding shaft is fixedly connected with a lower pressure plate, the top of the sliding shaft is fixedly connected with a limit block, the outer wall of the sliding shaft is sleeved with a third spring, the top of the third spring is fixedly connected to the support plate, and the bottom of the third spring is fixedly connected to the lower pressure plate.

[0012] Preferably, the lower pressure plate and the inner wall of the base are each fixedly connected with a number of second rotating shafts at equal intervals. The outer wall of the second rotating shaft is rotatably connected with a pulley, and the outer wall of the pulley is fixedly connected with a number of rubber rings at equal intervals.

[0013] Preferably, the bottom of the base is fixedly connected to a support leg.

[0014] The beneficial effects of this invention are as follows:

[0015] 1. The sheet metal cutting device of the present invention uses a motor to control the cutting machine to move laterally to cut the sheet metal. After the sheet metal is cut, the first support continues to move laterally. Through a set linkage component, the first support is connected to the second support. At this time, controlling the first support to move back can drive the second support and the grinding block to move together. The grinding block grinds the cut surface of the sheet metal to remove burrs and rough edges, preventing workers from being scratched by burrs when handling the sheet metal. While the second support moves laterally, it drives the gear to move laterally. Through the cooperation of the set rack and gear, the gear rotates during the lateral movement, driving the grinding block to rotate during the lateral movement. The grinding block rotates while laterally rubbing the cut surface of the sheet metal, which can improve the cleaning effect of burrs and rough edges on the sheet metal.

[0016] 2. The sheet metal sheet cutting device of the present invention, through the cooperation of the top plate and the inclined groove, enables the locking block to separate from the locking groove. After the locking block is removed, under the action of the two first springs, the two fixed plates move back, driving the second bracket and the grinding block to move back, which is convenient for use when cutting the next sheet metal sheet. In addition, the grinding block can grind the sheet metal sheet again during the process of moving back, improving the cleaning effect of burrs and rough edges on the sheet metal sheet.

[0017] 3. The sheet metal sheet cutting device of the present invention uses a third spring to press the lower pressure plate against the top of the sheet metal sheet, preventing the sheet metal sheet from bending due to stress during cutting. The two sets of pulleys facilitate the movement of the sheet metal sheet and the adjustment of the cutting position. The rubber ring protects the surface of the sheet metal sheet and prevents it from being scratched. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a perspective view of the base and support plate of the present invention in use;

[0020] Figure 2 This is a perspective view of the support plate of the present invention used in conjunction with a cutting machine;

[0021] Figure 3 This is an exploded view of the support plate and the lower pressure plate of the present invention in use;

[0022] Figure 4 This is a cross-sectional view of the lower pressure plate and the slot of the present invention in use;

[0023] Figure 5 This is a perspective view of the first and second supports of the present invention used together;

[0024] Figure 6 This is a cross-sectional view of the slider and the second bracket of the present invention in use;

[0025] Figure 7 This is the present invention. Figure 3 Enlarged view of point A in the middle;

[0026] Figure 8 This is the present invention. Figure 4 Enlarged view of point B in the middle;

[0027] Figure 9 This is the present invention. Figure 6 Enlarged view of point C in the middle;

[0028] In the diagram: 1. Base; 2. Support frame; 3. Hydraulic cylinder; 4. Support plate; 5. Motor; 6. Lead screw; 7. Slider; 8. First bracket; 9. Cutting machine; 10. Second bracket; 11. First rotating shaft; 12. Grinding block; 13. Fixing plate; 14. Fixing frame; 15. First spring; 16. Insert block; 17. Slot; 18. Slot; 19. Locking block; 20. Second spring; 21. Mounting plate; 22. Top plate; 23. Inclined groove; 24. Gear; 25. Rack; 26. Sliding shaft; 27. Limiting block; 28. Lower pressure plate; 29. ​​Third spring; 30. Second rotating shaft; 31. Pulley; 32. Rubber ring; 33. Support leg; 34. Hollow groove; 35. Connecting frame. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0030] like Figures 1 to 9 As shown, the present invention provides a technical solution: a sheet metal sheet cutting device, comprising a base 1, two support frames 2 symmetrically fixedly connected to the top of the base 1, a support plate 4 slidably connected between the two support frames 2, a hydraulic cylinder 3 fixedly connected to the top of the base 1, the output end of the hydraulic cylinder 3 fixedly connected to the support plate 4, a motor 5 fixedly connected to one side of the support plate 4, the output end of the motor 5 extending into the interior of the support plate 4 and fixedly connected to a lead screw 6, the lead screw 6 rotatably connected to the support plate 4, and a slider 7 connected to the outer wall of the lead screw 6 via a lead screw and nut pair, the slider 7 slidably connected to the support plate 4. The bottom of the slider 7 is fixedly connected to the first bracket 8, and the bottom of the first bracket 8 is fixedly connected to the cutting machine 9. The top of the base 1 and below the cutting machine 9 is provided with a slot 34. The bottom of the support plate 4 is provided with a grinding assembly, which includes a second bracket 10. The second bracket 10 is located at the bottom of the support plate 4 and is slidably connected to the support plate 4. The inner wall of the second bracket 10 is rotatably connected to the first rotating shaft 11. One end of the first rotating shaft 11 is fixedly connected to a grinding block 12. A linkage assembly is provided between the first bracket 8 and the second bracket 10. The bottom of the base 1 is fixedly connected to the support leg 33.

[0031] Using the above technical solution, the sheet metal is placed on the base 1, and its segmentation position is moved above the slot 34. The support plate 4 is moved downward by the hydraulic cylinder 3, which in turn moves the cutting machine 9 downward. The cutting machine 9 cuts the sheet metal. The motor 5 is started, which drives the lead screw 6 to rotate, causing the slider 7 to move laterally. This causes the first bracket 8 to move laterally, which in turn moves the cutting machine 9 laterally, thus segmenting the sheet metal. After the sheet metal is segmented, the first bracket 8 is controlled to move laterally. Through the set linkage component, the first bracket 8 is connected to the second bracket 10. At this time, the first bracket 8 is controlled to move back, causing the second bracket 10 and the grinding block 12 to move accordingly. The grinding block 12 grinds the cut surface of the sheet metal to remove the burrs and rough edges, preventing workers from being scratched by the burrs and rough edges when handling the sheet metal.

[0032] Specifically, the linkage component includes a plug 16, which is fixedly installed on the outer wall of the second bracket 10. A slot 18 is provided inside the first bracket 8. The plug 16 fits against the inner wall of the slot 18. A locking block 19 is slidably connected to the inner wall of the first bracket 8. The bottom of the locking block 19 extends into the interior of the slot 18 and is sloped. A second spring 20 is fixedly connected to the top of the locking block 19, and the top of the second spring 20 is fixedly connected to the first bracket 8. A slot 17 for use with the locking block 19 is provided on the top of the plug 16. A reset unit is provided at the bottom of the support plate 4. The reset unit includes two fixing brackets 14. The two fixing brackets 14 are connected to... The lead screw 6 is symmetrically fixedly installed at the bottom of the support plate 4. The two sides of the second bracket 10 are fixedly connected to the fixing plates 13. The two fixing plates 13 are slidably connected to the two fixing frames 14 respectively. The outer walls of the two fixing frames 14 are fitted with the first spring 15. One end of the first spring 15 is fixedly connected to the fixing frame 14, and the other end of the first spring 15 is fixedly connected to the fixing plate 13. The bottom of the support plate 4 is fixedly connected to the mounting plate 21. The outer wall of the mounting plate 21 is fixedly connected to the top plate 22. The outer wall of the first bracket 8 is provided with a through groove. The top plate 22 fits against the inner wall of the through groove. The outer wall of the locking block 19 is provided with an inclined groove 23 that cooperates with the top plate 22.

[0033] Through the above technical solution, after the sheet metal is divided, the first bracket 8 is controlled to move laterally, so that the insert block 16 is inserted into the slot 18. After the insert block 16 enters the slot 18, it presses against the inclined surface at the bottom of the locking block 19. Under the pressure of the insert block 16, the locking block 19 moves upward and presses the second spring 20. When the locking groove 17 on the insert block 16 moves below the locking block 19, the locking block 19 moves downward and inserts into the locking groove 17 under the action of the second spring 20. At this time, the first bracket 8 is controlled to move back. Under the pull of the locking block 19, the second bracket 10 moves accordingly, driving the grinding block 12 to move accordingly. At the same time as the second bracket 10 moves, the two fixing plates 13 also move accordingly. When the first bracket 8 moves to the mounting plate 21, the top plate 22 is inserted into the first bracket 8 along the through groove and presses against the inclined groove 23 on the outer wall of the locking block 19. Under the pressure of the top plate 22, the inclined groove 23 moves upward, which drives the locking block 19 to move upward. After the locking block 19 moves upward, it separates from the locking groove 17. After the locking block 19 is no longer limited, the two fixing plates 13 move back under the action of the two first springs 15, which drives the second bracket 10 and the grinding block 12 to move back. This makes it easier to use when cutting the next piece of sheet metal. In addition, the grinding block 12 can grind the sheet metal again during the process of moving back, which improves the cleaning effect of the burrs and rough edges on the sheet metal.

[0034] Specifically, a connecting frame 35 is fixedly connected to the bottom of the support plate 4, and a rack 25 is fixedly connected to the bottom of the connecting frame 35. One end of the first rotating shaft 11 passes through the second bracket 10 and is fixedly connected to a gear 24. The gear 24 meshes with the rack 25.

[0035] With the above technical solution, when the second bracket 10 moves laterally, it drives the gear 24 to move laterally. The gear 24 is engaged by the rack 25, so that the gear 24 rotates during the lateral movement, which drives the grinding block 12 to rotate during the lateral movement. The grinding block 12 rotates while laterally rubbing the cut surface of the sheet metal, which can improve the cleaning effect of the burrs and rough edges on the sheet metal.

[0036] Specifically, the inner wall of the support plate 4 is slidably connected with two sets of sliding shafts 26. The bottom of the sliding shaft 26 is fixedly connected with a lower pressure plate 28, and the top of the sliding shaft 26 is fixedly connected with a limit block 27. The outer wall of the sliding shaft 26 is fitted with a third spring 29. The top of the third spring 29 is fixedly connected to the support plate 4, and the bottom of the third spring 29 is fixedly connected to the lower pressure plate 28. The lower pressure plate 28 and the inner wall of the base 1 are both fixedly connected with several second rotating shafts 30 at equal intervals. The outer wall of the second rotating shaft 30 is rotatably connected with a pulley 31, and the outer wall of the pulley 31 is fixedly connected with several rubber rings 32 at equal intervals.

[0037] With the above technical solution, as the support plate 4 moves downward, it drives the sliding shaft 26 to move downward, causing the lower pressure plate 28 to move downward. When the cutting machine 9 cuts the sheet metal, the third spring 29 makes the lower pressure plate 28 press against the top of the sheet metal to prevent the sheet metal from bending due to stress during cutting. The two sets of pulleys 31 facilitate the movement of the sheet metal and adjust the position of the sheet metal section. The rubber ring 32 protects the surface of the sheet metal and prevents the surface of the sheet metal from being scratched.

[0038] In use, the sheet metal is placed on the base 1, and its cutting position is moved above the slot 34. The hydraulic cylinder 3 controls the support plate 4 to move downward, which in turn moves the cutting machine 9 downward. The cutting machine 9 cuts the sheet metal. The motor 5 is started, which drives the lead screw 6 to rotate, causing the slider 7 to move laterally. This causes the first bracket 8 to move laterally, which in turn moves the cutting machine 9 laterally, thus cutting the sheet metal. As the support plate 4 moves downward, it also drives the sliding shaft 26 to move downward, causing the lower pressure plate 28 to move downward. When the cutting machine 9 cuts the sheet metal, the third spring 29 keeps the lower pressure plate 28 pressed against the top of the sheet metal to prevent the sheet metal from being cut. The sheet metal plate bends due to stress during cutting. Two sets of pulleys 31 facilitate movement and adjustment of the sheet metal plate's cutting position. Rubber rings 32 protect the sheet metal plate's surface from scratches. After cutting, the first support 8 moves laterally, causing the insert 16 to be inserted into the slot 18. Once inside the slot 18, the insert 16 presses against the inclined surface at the bottom of the locking block 19. Under the pressure of the insert 16, the locking block 19 moves upward, compressing the second spring 20. When the slot 17 on the insert 16 moves below the locking block 19, the second spring 20 causes the locking block 19 to move downward and insert... Inside the slot 17, the first support 8 moves back, and under the pull of the locking block 19, the second support 10 moves accordingly, causing the grinding block 12 to move as well. As the second support 10 moves laterally, it drives the gear 24 to move laterally as well. Through the engagement of the rack 25 and the gear 24, the gear 24 rotates during the lateral movement, causing the grinding block 12 to rotate as well. The grinding block 12 rotates while laterally rubbing the cut surface of the sheet metal, improving the cleaning effect on burrs and rough edges. As the second support 10 moves, it drives the two fixing plates 13 to move as well, pressing the two first springs 15. When the bracket 8 moves to the mounting plate 21, the top plate 22 is inserted into the first bracket 8 along the through groove and presses against the inclined groove 23 on the outer wall of the locking block 19. Under the pressure of the top plate 22, the inclined groove 23 moves upward, driving the locking block 19 to move upward. After the locking block 19 moves upward, it separates from the locking groove 17. After losing the limiting position of the locking block 19, under the action of the two first springs 15, the two fixing plates 13 move back, driving the second bracket 10 and the grinding block 12 to move back, which is convenient for use when cutting the next sheet metal sheet. In addition, during the process of moving back, the grinding block 12 can grind the sheet metal sheet again, improving the cleaning effect of the rough edges and burrs on the sheet metal sheet.

[0039] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0040] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sheet metal cutting device, characterized in that, The system includes a base (1), with two support frames (2) symmetrically fixedly connected to the top of the base (1). A support plate (4) is slidably connected between the two support frames (2). A hydraulic cylinder (3) is fixedly connected to the top of the base (1). The output end of the hydraulic cylinder (3) is fixedly connected to the support plate (4). A motor (5) is fixedly connected to one side of the support plate (4). The output end of the motor (5) extends into the interior of the support plate (4) and is fixedly connected to a lead screw (6). The lead screw (6) is rotatably connected to the support plate (4). A slider (7) is connected to the outer wall of the lead screw (6) through a lead screw nut pair. The slider (7) is slidably connected to the support plate (4). A first bracket (8) is fixedly connected to the bottom of the slider (7). A cutting machine (9) is fixedly connected to the bottom of the first bracket (8). A slot (34) is opened on the top of the base (1) and below the cutting machine (9). A grinding assembly is provided at the bottom of the support plate (4).

2. The sheet metal cutting device according to claim 1, characterized in that, The polishing assembly includes a second bracket (10), which is disposed at the bottom of the support plate (4) and slidably connected to the support plate (4). A first rotating shaft (11) is rotatably connected to the inner wall of the second bracket (10), and a polishing block (12) is fixedly connected to one end of the first rotating shaft (11). A linkage assembly is provided between the first bracket (8) and the second bracket (10).

3. The sheet metal cutting device according to claim 2, characterized in that, The linkage assembly includes a plug (16), which is fixedly installed on the outer wall of the second bracket (10). The first bracket (8) has a slot (18) inside. The plug (16) fits into the inner wall of the slot (18). A locking block (19) is slidably connected to the inner wall of the first bracket (8). The bottom of the locking block (19) extends into the inside of the slot (18). The bottom of the locking block (19) is set as a slope. A second spring (20) is fixedly connected to the top of the locking block (19). The top of the second spring (20) is fixedly connected to the first bracket (8). A slot (17) for use with the locking block (19) is opened on the top of the plug (16). A reset unit is provided at the bottom of the support plate (4).

4. A sheet metal cutting device according to claim 3, characterized in that, The reset unit includes two fixed brackets (14), which are symmetrically fixedly installed at the bottom of the support plate (4) with the lead screw (6) as the center. Fixed plates (13) are fixedly connected to both sides of the second bracket (10). The two fixed plates (13) are slidably connected to the two fixed brackets (14). The outer walls of the two fixed brackets (14) are fitted with first springs (15). One end of the first spring (15) is fixedly connected to the fixed bracket (14), and the other end of the first spring (15) is fixedly connected to the fixed plate (13). The bottom of the support plate (4) is fixedly connected to the mounting plate (21), and the outer wall of the mounting plate (21) is fixedly connected to the top plate (22). The outer wall of the first bracket (8) is provided with a through groove, and the top plate (22) fits against the inner wall of the through groove. The outer wall of the locking block (19) is provided with an inclined groove (23) that cooperates with the top plate (22).

5. A sheet metal cutting device according to claim 2, characterized in that, The bottom of the support plate (4) is fixedly connected to a connecting frame (35), and the bottom of the connecting frame (35) is fixedly connected to a rack (25). One end of the first rotating shaft (11) passes through the second bracket (10) and is fixedly connected to a gear (24). The gear (24) meshes with the rack (25).

6. A sheet metal cutting device according to claim 1, characterized in that, The inner wall of the support plate (4) is slidably connected to two sets of sliding shafts (26). The bottom of the sliding shaft (26) is fixedly connected to a lower pressure plate (28). The top of the sliding shaft (26) is fixedly connected to a limit block (27). The outer wall of the sliding shaft (26) is fitted with a third spring (29). The top of the third spring (29) is fixedly connected to the support plate (4), and the bottom of the third spring (29) is fixedly connected to the lower pressure plate (28).

7. A sheet metal cutting device according to claim 6, characterized in that, The lower pressure plate (28) and the inner wall of the base (1) are both fixedly connected with several second rotating shafts (30) at equal intervals. The outer wall of the second rotating shaft (30) is rotatably connected with a pulley (31). The outer wall of the pulley (31) is fixedly connected with several rubber rings (32) at equal intervals.

8. A sheet metal cutting device according to claim 1, characterized in that, The bottom of the base (1) is fixedly connected to a support leg (33).

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