Blank pressing machine for machining sheet metal cover plate

Abstract

The invention relates to the technical field of edge pressing, in particular to an edge pressing machine for sheet metal cover plate machining, which comprises a rack, a first cylinder, an upper disc, a motor, a lower disc, a positioning assembly, an edge pressing assembly and the like, the first air cylinder is installed on a transverse plate at the top of the rack, the upper portion of one side of the rack is of a square structure, the lower end of a piston rod of the first air cylinder is rotationally connected with an upper disc, the motor is installed on the rack through an L-shaped connecting piece, an output shaft of the motor is connected with a lower disc, the inner diameter and the outer diameter of the lower disc are consistent with those of the upper disc, and the lower disc is arranged under the upper disc. The part, protruding out of the outer side of the circumference of the lower disc, of the metal plate cover plate is bent through downward pressing of the downward pressing cylinder, and therefore edge pressing operation on the metal plate cover plate is achieved. When the downward pressing cylinder and the square-shaped frame move upwards, the T-shaped cutting piece slides into a V-shaped groove of the square-shaped frame, a cutting knife of the T-shaped cutting piece conducts cutting operation on the bent metal plate cover plate part, and therefore the function of cutting operation on the metal plate cover plate completing edge pressing operation is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of hemming, and particularly relates to a hemming machine for processing sheet metal covers. Background Art

[0002] Sheet metal parts are products processed by sheet metal technology, and we can't live without sheet metal parts everywhere in life. Sheet metal parts are made by filament power windings, laser cutting, heavy processing, metal bonding, metal drawing, plasma cutting, precision welding, roll forming, sheet metal bending forming, die forging, and water jet cutting.

[0003] After the cover plate is formed by sheet metal stamping, it often needs to be hemmed. For example, for a circular well cover plate, after the existing cover plate is completed with sheet metal stamping, it is generally conveyed to a hemming machine by a production line for hemming operation, and then the redundant part at the hemmed part is cut, and finally chamfering and other processes are carried out. However, for this method, each process needs to be taken out from the corresponding fixture and conveyed to the fixture of the next process. This production line operation method requires repeatedly taking out and placing the cover plate on the fixture and fixing it by the fixture, reducing the overall operation efficiency and increasing the processing cost.

[0004] Based on this, it is necessary to design a hemming machine for processing sheet metal covers that can integrate hemming, cutting, and chamfering, so as to improve the hemming operation efficiency of sheet metal covers and reduce the processing cost. Summary of the Invention

[0005] The technical solution of the present invention is: a hemming machine for processing sheet metal covers, including a frame, a first cylinder, an upper disc, a motor, a lower disc, a positioning component, a hemming component, a cutting component, and a chamfering component. The first cylinder is installed on the cross plate at the top of the frame. One side of the upper part of the frame is in a "mouth" - shaped structure. The lower end of the piston rod of the first cylinder is rotatably connected to the upper disc. The motor is installed on the frame through an L - shaped connecting piece. The output shaft of the motor is connected to the lower disc with the same inner and outer diameters as the upper disc. The lower disc is arranged directly below the upper disc. The sheet metal cover on the lower disc is positioned by the positioning component arranged on the frame. The periphery of the sheet metal cover is hemmed by pressing down the hemming component. When the hemming component moves upward, it drives the cutting component to perform a cutting operation on the sheet metal cover that has completed the hemming operation, and drives the chamfering component to perform a chamfering operation on the sheet metal cover that has completed the cutting operation.

[0006] Further, the positioning component includes a Z - shaped rod, a limiting block, and a first spring. The Z - shaped rods are symmetrically arranged on two symmetrical inner walls of the upper part of the frame opposite to the "mouth" - shaped part. The limiting block is slidably installed on the Z - shaped rod. The limiting block is arranged between the upper disc and the lower disc. The first spring is arranged between the Z - shaped rod and the limiting block.

[0007] Further, the edge pressing assembly includes a second air cylinder and a downward pressing cylinder. The second air cylinders are symmetrically installed on both sides of the top horizontal plate of the frame centered on the first air cylinder. The ends of the piston rods of the second air cylinders are commonly connected to the downward pressing cylinder that performs edge pressing operations on the sheet metal cover plate. The inner diameter value of the downward pressing cylinder is greater than the outer diameter values of the upper disc and the lower disc. The downward pressing cylinder moves downward under the driving action of the second air cylinder and bends the part of the sheet metal cover plate located outside the upper disc and the lower disc.

[0008] Further, the cutting assembly includes a connecting frame, a T-shaped cutting piece, a second spring, and a square frame. The T-shaped cutting piece is slidably installed on the frame through the connecting frame. The cutting knife of the T-shaped cutting piece faces the outer circumferential wall of the lower disc. A second spring is arranged between the side of the T-shaped cutting piece facing away from the lower disc and the connecting frame. A square frame is installed on the outer wall of the downward pressing cylinder. The T-shaped cutting piece passes through the square frame and is slidably matched with a V-shaped groove formed in the square frame.

[0009] Further, the chamfering assembly includes a U-shaped frame, an L-shaped push rod, a chamfering piece, a third spring, and a dialing frame. The U-shaped frames are symmetrically installed on the two vertical rods of the "square" part of the frame. The L-shaped push rod is slidably installed on the U-shaped frame. The end of the L-shaped push rod facing the lower disc is connected to the chamfering piece. A third spring is arranged between the chamfering piece and the U-shaped frame. The part of the L-shaped push rod away from the chamfering piece can be in extrusion fit with the dialing frame arranged on the square frame. When the dialing frame rises with the square frame, after the dialing frame contacts the L-shaped push rod, it extrudes the L-shaped push rod, and the L-shaped push rod is driven by the pressure to drive the chamfering piece to perform chamfering operations on the sheet metal cover plate.

[0010] Further, it further includes a hexagonal frame, a sliding plate, a push handle, an inclined rod, a D-shaped frame, a U-shaped rod, a fourth spring, and a top block. The hexagonal frame is installed on the frame and is arranged below the lower disc. Two symmetrical sliding plates are slidably installed on the hexagonal frame. A push handle is arranged between the two sliding plates. Two D-shaped frames are symmetrically arranged on the hexagonal frame. The U-shaped rod is slidably installed on the vertical rod of the D-shaped frame. The end of the U-shaped rod is connected to the top block. A fourth spring is arranged between the lower end of the vertical rod of the U-shaped rod and the D-shaped frame. The inclined rod that extrudes and lifts the U-shaped rod is arranged on the top of the sliding plate.

[0011] Further, it further includes a dialing rod. The dialing rods are arranged on the side walls of the two sliding plates facing the frame. The dialing rods can be in extrusion fit with the limiting blocks. The dialing rods extrude the limiting blocks to make the limiting blocks move in a direction away from the upper disc and the lower disc.

[0012] Further, it further includes a temperature reduction component provided on the frame for cooling and temperature reduction during the cutting operation of the T-shaped cutting piece.

[0013] Further, it further includes a collection box installed at the lower part of the frame for collecting cooling waste liquid and cutting debris, and the collection box is arranged directly below the temperature reduction component.

[0014] Further, a filter screen is arranged inside the collection box, the filter screen blocks the cutting debris, and the cooling liquid flows to the lower part of the collection box after being filtered by the filter screen.

[0015] The beneficial effects are as follows: 1. The second cylinder drives the pressing cylinder and the square frame to press down. The pressing cylinder presses down to bend the part of the sheet metal cover plate protruding from the outer circumference of the lower disc, thereby realizing the edge pressing operation of the sheet metal cover plate. The square frame moves down to push the T-shaped cutting piece away, providing convenience for the pressing cylinder to perform the edge pressing operation on the sheet metal cover plate. When the second cylinder drives the pressing cylinder and the square frame to move up, the T-shaped cutting piece slides into the V-shaped groove of the square frame, and the motor drives the lower disc and the sheet metal cover plate to rotate, realizing the cutting operation of the cutting knife of the T-shaped cutting piece on the bent part of the sheet metal cover plate, thereby realizing the function of cutting the sheet metal cover plate after the edge pressing operation is completed.

[0016] 2. As the pressing cylinder and the square frame continue to move up, the T-shaped cutting piece is pushed out by the square frame in a direction away from the sheet metal cover plate. The dialing frame moves up to contact and squeeze the L-shaped push rod. After being squeezed, the L-shaped push rod drives the chamfering part to move towards the sheet metal cover plate and contact it. By driving the lower disc and the sheet metal cover plate to move by the motor, the chamfering part chamfers the right angle of the bent sheet metal cover plate during rotational movement, thereby realizing the function of efficiently chamfering the sheet metal cover plate.

[0017] 3. The method of realizing the integrated operations of edge pressing, cutting and chamfering of the sheet metal cover plate by this edge press greatly improves the operation efficiency and reduces the processing cost. Description of the Drawings

[0018] Figure 1 It is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 It is a three-dimensional structural diagram of components such as the upper disc and the lower disc in the state where the piston rod of the first cylinder of the present invention contracts.

[0020] Figure 3 It is a partial three-dimensional structural diagram of the cooperation between the limit block and the upper disc and the lower disc of the present invention.

[0021] Figure 4 It is a partial three-dimensional structural diagram of components such as the second cylinder, the pressing cylinder, the T-shaped cutting piece and the square frame of the present invention.

[0022] Figure 5 This is a partial three-dimensional structural schematic diagram of components such as the L-shaped push rod, chamfering part, and dialing frame of the present invention.

[0023] Figure 6 This is a three-dimensional structural schematic diagram of components such as the frame, cooling component, and collection box of the present invention.

[0024] Figure 7 This is a partial three-dimensional structural schematic diagram of the components installed below the lower disc of the present invention in cooperation with components such as the limit block.

[0025] Figure 8 This is a three-dimensional structural schematic diagram of components such as the sliding plate, inclined rod, and U-shaped rod of the present invention.

[0026] In the reference numerals: 1-frame, 100-sheet metal cover plate, 2-first cylinder, 3-upper disc, 4-motor, 5-lower disc, 6-Z-shaped rod, 7-limit block, 8-first spring, 9-second cylinder, 10-lowering cylinder, 11-connecting frame, 12-T-shaped cutting part, 13-second spring, 14-square frame, 15-U-shaped frame, 16-L-shaped push rod, 17-chamfering part, 18-third spring, 19-dialing frame, 20-cooling component, 21-collection box, 22-hexagonal frame, 23-sliding plate, 231-push handle, 24-inclined rod, 25-D-shaped frame, 26-U-shaped rod, 27-fourth spring, 28-top block, 29-dialing rod. Detailed implementation manners

[0027] The following specifically introduces the present invention in combination with the accompanying drawings and specific embodiments.

[0028] Embodiment: A hemming machine for processing sheet metal cover plates, as Figure 1 and Figure 2As shown in the figure, it includes a machine frame 1, a first cylinder 2, an upper disc 3, a motor 4, a lower disc 5, a positioning component, a hemming component, a cutting component, and a chamfering component. The first cylinder 2 is installed on the cross plate at the top of the machine frame 1. The upper left part of the machine frame 1 is in a "mouth" - shaped structure, and the right side of the machine frame 1 is in a closed structure similar to a "π" - shaped structure. The lower end of the piston rod of the first cylinder 2 is rotatably connected to the upper disc 3. The upper disc 3 is rotatably installed at the lower end of the piston rod of the first cylinder 2, which is convenient for driving the upper disc 3 to move downward by the piston rod of the first cylinder 2 to press and fix the sheet metal cover 100. At the same time, the rotatable installation facilitates the upper disc to rotate with the circular sheet metal cover 100. The motor 4 is installed on the lower cross bar of the "mouth" - shaped part of the machine frame 1 through an L - shaped connecting piece. A lower disc 5 with the same inner and outer diameters as the upper disc 3 is connected to the output shaft of the motor 4. The lower disc 5 is arranged directly below the upper disc 3. The sheet metal cover 100 is placed on the lower disc 5. The sheet metal cover 100 is fed from the left side of the machine and discharged from the right side. The positioning component arranged on the machine frame 1 positions the sheet metal cover 100 on the lower disc 5. The hemming component presses down to hem the periphery of the sheet metal cover 100. When the hemming component moves upward, it drives the cutting component to perform cutting operations on the sheet metal cover 100 that has been hemmed, and drives the chamfering component to perform chamfering operations on the sheet metal cover 100 that has completed the cutting operation.

[0029] As Figure 3 shown, the positioning component includes a Z - shaped rod 6, a limiting block 7, and a first spring 8. The Z - shaped rods 6 are symmetrically arranged on the front and rear symmetric inner walls on the right side of the machine frame 1. The limiting block 7 is slidably installed on the Z - shaped rod 6. The part of the limiting block 7 facing the upper disc 3 and the lower disc 5 is rotatably provided with limiting rollers, and the limiting rollers are in contact with the sheet metal cover, greatly reducing the friction between the limiting block and the sheet metal cover 100, ensuring that the sheet metal cover 100 rotates with the lower disc 5. The limiting block 7 is arranged between the upper disc 3 and the lower disc 5. A first spring 8 is arranged between the Z - shaped rod 6 and the limiting block 7. The first spring 8 is a compression spring, and its initial state is as Figure 3 shown.

[0030] As Figure 4 shown, the hemming component includes a second cylinder 9 and a lower pressing cylinder 10. The second cylinders 9 are symmetrically installed on both sides of the top cross plate of the machine frame 1 with the first cylinder 2 as the center. The ends of the piston rods of the second cylinders 9 are jointly connected to a lower pressing cylinder 10 for hemming the sheet metal cover 100. The inner diameter value of the lower pressing cylinder 10 is greater than the outer diameter values of the upper disc 3 and the lower disc 5. The lower pressing cylinder 10 moves downward under the driving action of the second cylinder 9 and bends downward the part of the sheet metal cover 100 outside the upper disc 3 and the lower disc 5, thereby realizing the function of hemming the circumference of the sheet metal cover 100.

[0031] As Figure 4As shown in the figure, the cutting assembly includes a connecting frame 11, a T-shaped cutting member 12, a second spring 13, and a square frame 14. A T-shaped cutting member 12 is slidably mounted on the machine frame 1 through the connecting frame 11. The end of the connecting frame 11 facing the T-shaped cutting member 12 is of a U-shaped structure, and this U-shaped structure slidably penetrates through the T-shaped cutting member 12. The cutting knife of the T-shaped cutting member 12 faces the outer circumferential wall of the lower disc 5 and can contact the sheet metal cover 100. A second spring 13 is provided between the side of the T-shaped cutting member 12 facing away from the lower disc 5 and the connecting frame 11. The second spring 13 is a compression spring, and its initial state is as Figure 4 shown. A square frame 14 is mounted on the outer wall of the pressing cylinder 10. The T-shaped cutting member 12 passes through the square frame 14 and is slidably engaged with a V-shaped groove formed in the square frame 14. The T-shaped cutting member 12 is initially located in the V-shaped groove of the square frame 14 (as Figure 4 shown). When the pressing cylinder 10 moves downward, the square frame 14 squeezes the T-shaped cutting member 12 to make it move relatively along the upper groove wall of the V-shaped groove of the square frame 14. Under the squeezing action of the square frame 14, the T-shaped cutting member 12 moves away from the lower disc 5, facilitating the edge pressing operation of the pressing cylinder 10 on the sheet metal cover. When the pressing cylinder 10 rises, the square frame 14 rises. Under the action of the second spring 13, the T-shaped cutting member 12 moves downward relatively along the V-shaped groove on the square frame 14 and gradually contacts the surface of the sheet metal cover 100 being edge pressed. When the motor 4 drives the lower disc 5 and the sheet metal cover 100 to move, the cutting knife on the T-shaped cutting member 12 performs a cutting operation on the rotating sheet metal cover 100.

[0032] As Figure 6 shown, it further includes a cooling component 20 and a collection box 21 provided on the machine frame 1 to provide cooling and temperature reduction during the cutting operation of the T-shaped cutting member 12. The cooling component 20 includes a coolant storage cylinder, an infusion pipe communicating with the coolant storage cylinder, and a nozzle for spraying the coolant onto the cutting operation area of the T-shaped cutting member 12 on the sheet metal cover 100. A collection box 21 for collecting cooling waste liquid and cutting debris is installed at the lower part of the machine frame 1. The collection box 21 is provided directly below the cooling component 20. A filter screen is provided inside the collection box 21 to block the cutting debris, and the cooling liquid flows to the lower part of the collection box 21 after being filtered by the filter screen.

[0033] During use, place the sheet metal cover plate 100 between the upper disc 3 and the lower disc 5. Limit both sides of the sheet metal cover plate 100 through the limit blocks 7. Subsequently, through the extension movement of the piston rod of the first cylinder 2, the upper disc 3 moves downward to fix the sheet metal cover plate 100 between the upper disc 3 and the lower disc 5; Subsequently, the piston rod of the second cylinder 9 drives the pressing cylinder 10 to move downward, and the pressing cylinder 10 presses the part of the sheet metal cover plate 100 located outside the upper disc 3 and the lower disc 5 to bend it; When the pressing cylinder 10 moves downward, the square frame 14 installed on the pressing cylinder 10 moves downward synchronously. The T-shaped cutting piece 12 moves away from the V-shaped groove opened on the square frame 14. The downward movement of the square frame 14 causes the T-shaped cutting piece 12 to move upward relative to the V-shaped groove opened on the square frame 14, and the second spring 13 is compressed. In this way, the T-shaped cutting piece 12 is far away from the lower disc 5, thus avoiding the situation where the cutting knife of the T-shaped cutting piece 12 contacts the pressing cylinder 10 and causes the pressing cylinder 10 to be scratched or the T-shaped cutting piece 12 to be damaged; When the pressing cylinder 10 completes the bending operation of the sheet metal cover plate 100, when the motor 4 drives the lower disc 5 to rotate, the lower disc 5 drives the sheet metal cover plate 100 and the upper disc 3 to rotate synchronously; Subsequently, the second cylinder 9 drives the pressing cylinder 10 and the square frame 14 to move upward. Under the action of the second spring 13, the upward movement of the square frame 14 causes the T-shaped cutting piece 12 to move downward relative to the V-shaped groove opened on the square frame 14. In this way, the cutting knife of the T-shaped cutting piece 12 gradually contacts the bent part of the sheet metal cover plate 100, so as to realize the function of cutting the bent part of the sheet metal cover plate 100. The coolant is sprayed on the cutting operation area of the sheet metal cover plate 100 by the nozzle of the cooling component 20 to realize the cooling function of the T-shaped cutting piece 12 and the sheet metal cover plate 100, and wash the cutting debris downward. The debris and waste liquid are collected by the collection box 21.

[0034] As Figure 5 shown, the chamfering component includes a U-shaped frame 15, an L-shaped push rod 16, a chamfering piece 17, a third spring 18 and a dialing frame 19. The U-shaped frames 15 are symmetrically installed on the outer walls of the two vertical rods of the "square" part of the frame 1. The L-shaped push rod 16 is slidably installed on the U-shaped frame 15. The end of the L-shaped push rod 16 facing the lower disc 5 is connected with a chamfering piece 17. A chamfering wheel is arranged on the chamfering piece 17. A third spring 18 is arranged between the chamfering piece 17 and the U-shaped frame 15. The third spring 18 is a tension spring, and its initial state is as Figure 5 shown, and this state is the state without being stretched and deformed. The part of the L-shaped push rod 16 far away from the chamfering piece 17 can be in extrusion fit with the dialing frame 19 arranged on the square frame 14. When the dialing frame 19 rises with the square frame 14, after the dialing frame 19 contacts the L-shaped push rod 16, it extrudes the L-shaped push rod 16, and the L-shaped push rod 16 is pressed to drive the chamfering piece 17 to perform chamfering operation on the sheet metal cover plate 100.

[0035] As Figure 7And Figure 8 As shown, it further includes a hexagonal frame 22, a sliding plate 23, a push handle 231, an inclined rod 24, a D-shaped frame 25, a U-shaped rod 26, a fourth spring 27, a top block 28 and a lever 29. The hexagonal frame 22 is installed on the four vertical rods at the upper part of the installation frame 1, and the hexagonal frame 22 is arranged below the lower disc 5. Two symmetrical sliding plates 23 are slidably installed on the hexagonal frame 22. A push handle 231 is arranged between the two sliding plates 23. Two symmetrical D-shaped frames 25 are arranged on the hexagonal frame 22. A U-shaped rod 26 is slidably installed on the vertical rod of the D-shaped frame 25. The end of the U-shaped rod 26 is connected with a top block 28. A fourth spring 27 is arranged between the lower end of the vertical rod of the U-shaped rod 26 and the D-shaped frame 25. An inclined rod 24 for extruding and lifting the U-shaped rod 26 is arranged on the top of the sliding plate 23. Levers 29 are arranged on the side walls of the two sliding plates 23 facing the frame 1. The lever 29 can be in extrusion fit with the limiting block 7. The lever 29 extrudes the limiting block 7 to make the limiting block 7 move away from the upper disc 3 and the lower disc 5.

[0036] When the second air cylinder 9 drives the lower pressing cylinder 10 and the square frame 14 to move upward, the square frame 14 drives the dialing frame 19 to move upward. When the square frame 14 moves upward and makes the T-shaped cutting member 12 relatively move to the bottom of the V-shaped groove of the square frame 14, the dialing frame 19 contacts the L-shaped push rod 16. As the second air cylinder 9 drives the lower pressing cylinder 10 and the square frame 14 to continue to move upward, the T-shaped cutting member 12 is pushed out by the groove wall of the V-shaped groove opened in the lower part of the square frame 14, and the T-shaped cutting member 12 is far away from the bent part of the sheet metal cover plate 100. At the same time, the dialing frame 19 makes a relative upward movement and extrudes the L-shaped push rod 16. The L-shaped push rod 16 is pressed and drives the chamfering member 17 to move towards the bent part of the sheet metal cover plate 100 and contact it. The chamfering member 17 performs a rounding operation on the right-angle outer wall of the sheet metal cover plate 100, and the third spring 18 is stretched and deformed, realizing the function of chamfering the right-angle outer wall of the sheet metal cover plate 100; then the first air cylinder 2 drives the upper disc 3 to move upward to release the upper limit of the sheet metal cover plate 100. By pulling the push handle 231 to the right, the push handle 231 drives the two sliding plates 23 connected thereto to move to the right. The sliding plate 23 drives the inclined rod 24 to move. When the inclined rod 24 moves, it will extrude the U-shaped rod 26. After being extruded, the U-shaped rod 26 moves upward along the vertical rod of the D-shaped frame 25, and the fourth spring 27 is stretched and deformed. The upward movement of the U-shaped rod 26 makes it contact the sheet metal cover plate 100 upward through the connected top block 28 and apply an upward thrust to the sheet metal cover plate 100, thereby ejecting the sheet metal cover plate 100 from the lower disc 5; at the same time, when the sliding plate 23 moves to the right, the lever 29 installed on the side wall of the sliding plate 23 approaches the limiting block 7 and exerts an extrusion effect on the limiting block 7, making the limiting block 7 move along the Z-shaped rod 6 towards the frame 1 direction, and the first spring 8 is compressed and deformed, thereby releasing the limiting function of the limiting block 7 on the sheet metal cover plate 100, so as to conveniently take out the sheet metal cover plate 100 from the right side of the frame 1.

[0037] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A hemming machine for sheet metal cover plate processing, comprising a frame (1) and a first cylinder (2), the first cylinder (2) is installed on the cross plate at the top of the frame (1), and the upper part on one side of the frame (1) is in a "mouth" - shaped structure, characterized in that: It further includes an upper disc (3), a motor (4), a lower disc (5), a positioning component, a hemming component, a cutting component and a chamfering component. The lower end of the piston rod of the first cylinder (2) is rotatably connected to the upper disc (3). The motor (4) is installed on the frame (1) through an L-shaped connecting piece. A lower disc (5) with the same inner and outer diameters as the upper disc (3) is connected to the output shaft of the motor (4). The lower disc (5) is arranged directly below the upper disc (3). The positioning component arranged on the frame (1) positions the sheet metal cover plate (100) on the lower disc (5). When the hemming component moves downward, it presses the periphery of the sheet metal cover plate (100). When the hemming component moves upward, it drives the cutting component to perform a cutting operation on the sheet metal cover plate (100) that has been hemmed, and drives the chamfering component to perform a chamfering operation on the sheet metal cover plate (100) that has completed the cutting operation.

2. The hemming machine for sheet metal cover plate processing according to claim 1, wherein: The positioning component includes a Z-shaped rod (6), a limiting block (7) and a first spring (8). The Z-shaped rods (6) are symmetrically arranged on two symmetric inner walls of the upper part of the frame (1) opposite to the "mouth"-shaped part. The limiting block (7) is slidably installed on the Z-shaped rod (6). The limiting block (7) is arranged between the upper disc (3) and the lower disc (5). The first spring (8) is arranged between the Z-shaped rod (6) and the limiting block (7).

3. A hemming machine for processing sheet metal covers according to claim 1, characterized in that: The hemming component includes a second cylinder (9) and a lower pressing cylinder (10). The second cylinders (9) are symmetrically installed on both sides of the top cross plate of the frame (1) centered on the first cylinder (2). The ends of the piston rods of the second cylinders (9) are jointly connected to the lower pressing cylinder (10) that performs a hemming operation on the sheet metal cover plate (100). The inner diameter value of the lower pressing cylinder (10) is greater than the outer diameter values of the upper disc (3) and the lower disc (5). The lower pressing cylinder (10) moves downward under the driving action of the second cylinder (9) and bends the part of the sheet metal cover plate (100) located outside the upper disc (3) and the lower disc (5).

4. The hemming machine for sheet metal cover plate processing according to claim 1, characterized in that: The cutting component includes a connecting frame (11), a T-shaped cutting piece (12), a second spring (13) and a square frame (14). The T-shaped cutting piece (12) is slidably installed on the frame (1) through the connecting frame (11). The cutting knife of the T-shaped cutting piece (12) faces the outer circumferential wall of the lower disc (5). The second spring (13) is arranged between the side of the T-shaped cutting piece (12) facing away from the lower disc (5) and the connecting frame (11). The square frame (14) is installed on the outer wall of the lower pressing cylinder (10). The T-shaped cutting piece (12) passes through the square frame (14) and is slidably matched with the V-shaped groove opened on the square frame (14).

5. The hemming machine for sheet metal cover plate processing according to claim 4, wherein: The chamfering assembly includes a U-shaped frame (15), an L-shaped push rod (16), a chamfering part (17), a third spring (18), and a dialing frame (19). The U-shaped frames (15) are symmetrically installed on the two vertical rods of the "mouth" - shaped part of the frame (1). The L-shaped push rod (16) is slidably installed on the U-shaped frame (15). One end of the L-shaped push rod (16) facing the lower disc (5) is connected to the chamfering part (17). The third spring (18) is arranged between the chamfering part (17) and the U-shaped frame (15). The part of the L-shaped push rod (16) away from the chamfering part (17) can be in extrusion fit with the dialing frame (19) arranged on the square frame (14). When the dialing frame (19) rises with the square frame (14), after the dialing frame (19) contacts the L-shaped push rod (16), it extrudes the L-shaped push rod (16). The L-shaped push rod (16) is pressed to drive the chamfering part (17) to chamfer the sheet metal cover plate (100).

6. The hemming machine for sheet metal cover plate processing according to claim 1, wherein: It further includes a hexagonal frame (22), a sliding plate (23), a push handle (231), an inclined rod (24), a D-shaped frame (25), a U-shaped rod (26), a fourth spring (27), and a top block (28). The hexagonal frame (22) is installed on the frame (1) and is arranged below the lower disc (5). Two symmetric sliding plates (23) are slidably installed on the hexagonal frame (22). The push handle (231) is arranged between the two sliding plates (23). Two D-shaped frames (25) are symmetrically arranged on the hexagonal frame (22). The U-shaped rod (26) is slidably installed on the vertical rod of the D-shaped frame (25). The end of the U-shaped rod (26) is connected to the top block (28). The fourth spring (27) is arranged between the lower end of the vertical rod of the U-shaped rod (26) and the D-shaped frame (25). The inclined rod (24) for extruding and lifting the U-shaped rod (26) is arranged at the top of the sliding plate (23).

7. The hemming machine for sheet metal cover plate processing according to claim 6, characterized in that: It further includes a dialing rod (29). The dialing rods (29) are arranged on the side walls of the two sliding plates (23) facing the frame (1). The dialing rod (29) can be in extrusion fit with the limit block (7). The dialing rod (29) extrudes the limit block (7) to make the limit block (7) move away from the upper disc (3) and the lower disc (5).

8. The hemming machine for sheet metal cover plate processing according to claim 4, characterized in that: It further includes a cooling component (20) arranged on the frame (1) to provide cooling for the cutting operation of the T-shaped cutting part (12).

9. The hemming machine for sheet metal cover plate processing according to claim 8, wherein: It further includes a collection box (21) installed at the lower part of the frame (1) to collect cooling waste liquid and cutting debris. The collection box (21) is arranged directly below the cooling component (20).

10. A hemming machine for processing sheet metal covers as described in claim 9, characterized in that: A filter screen is arranged inside the collection box (21). The filter screen blocks the cutting debris, and the cooling liquid flows to the lower part of the collection box (21) after being filtered by the filter screen.

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