A metal coil slitting machine

Abstract

The application provides a metal coil slitting machine and belongs to the technical field of cutter processing. The application solves the problem that the outer diameter of the cutter head is reduced after a period of use, and the outer diameter of all cutter heads needs to be processed to the same size, so that each group of cutter heads is located at the same height, and the height of the upper and lower cutter head assemblies is adjusted to make the cutting surfaces of the upper and lower cutter head assemblies tightly engage, and the adjustment process is complicated. The cutter head assembly of the application comprises a cutter seat, a cutter head rotatably arranged on the cutter seat, an installation disc rotatably arranged on the cutter seat, and the cutter head is fixedly arranged on the installation disc. The fitting surface of the cutter head and the installation disc is the installation surface of the cutter head, and the installation surfaces of the two cutter heads correspondingly engage to form a cutting position. The advantage of the application is that the installation surface of the cutter head and the installation disc is used as the cutting surface. When the cutting surface is worn, the worker processes the cutting surface, and the height of the cutter head does not need to be adjusted, and the installation process is simple and fast.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tool processing, and relates to a metal coil stock slitting machine. BACKGROUND

[0002] The width of the metal coil stock produced by a rolling mill is very large and does not meet the width of the metal coil stock required by a purchaser, so it is necessary to slit the metal coil stock with a large width into several metal strips with a small width according to the requirements of the purchaser.

[0003] The slitting machine for cutting the metal coil stock on the market is generally composed of several slitting cutter discs, the width of slitting is adjusted by adjusting the distance between the slitting cutter discs, the slitting cutter disc includes two sets of cutter disc assemblies arranged above and below, the metal coil stock is located between the two sets of cutter disc assemblies, the cutter disc assembly includes a cutter seat, a cutter disc rotatably arranged on the cutter seat, and a driving mechanism for driving the cutter disc to rotate, the outer surface of the cutter disc is a cutting surface, and the outer surface is engaged with the outer surface of the other set of cutter discs arranged above and below to cut.

[0004] After a long time of cutting work, the cutting surface of the cutter disc will be worn, the outer diameter of the cutter disc will be reduced, the two sets of cutter discs cannot be precisely engaged, and the equipment cannot work normally; therefore, after a period of use, the cutting surface needs to be reprocessed, and the workers need to process the outer diameters of all the cutter discs to the same size, so that each set of cutter discs is located at the same height, and the heights of the two sets of cutter disc assemblies are adjusted to make the cutting surfaces of the two sets of cutter discs closely engage. This cutter disc structure needs to be adjusted by workers after a period of use, and the adjustment process is complicated and requires high adjustment accuracy.

[0005] The cutter disc is generally rotatably arranged on the cutter seat by a cutter shaft, and the inner hole of the cutter disc and the outer diameter of the cutter shaft are tightly fitted, so that the cutter disc is time-consuming and laborious to disassemble and assemble. SUMMARY

[0006] The purpose of the present application is to solve the above-mentioned problems of the cutter disc assembly of the existing slitting machine, and a slitting machine capable of conveniently adjusting the cutting surfaces of the two sets of cutter discs corresponding above and below is provided.

[0007] The purpose of the present application can be achieved by the following technical scheme:

[0008] A metal coil slitting machine characterized in comprising a frame and a conveying device and a cutting device arranged on the frame, the cutting device comprising a plurality of slitting members arranged along the width direction of the coil, the conveying device being used to convey the metal coil through the cutting device so that the metal coil can be cut into a plurality of strips by the slitting members, the slitting member comprising an upper set of cutter disc assemblies and a lower set of cutter disc assemblies, the two sets of cutter disc assemblies being centrally symmetrically arranged, the metal coil being located between the two sets of cutter disc assemblies, the cutter disc assembly comprising a cutter seat, a cutter disc rotatably arranged on the cutter seat, and a driving mechanism used to drive the cutter disc to rotate, the cutter seat being rotatably provided with a mounting disc, the cutter disc being fixedly arranged on the mounting disc, the abutting surface of the cutter disc and the mounting disc being the mounting surface of the cutter disc, the mounting surfaces of the two cutter discs being engaged with each other to form a cutting position.

[0009] In the above metal coil slitting machine, the outer periphery of the mounting disc is provided with a rubber sleeve, the outer wheel surface of the cutter disc of one set of cutter disc assemblies abutting against the rubber sleeve of the other set of cutter disc assemblies.

[0010] In the above metal coil slitting machine, the side end surface of the mounting disc towards the cutter disc is provided with a mounting protrusion, the cutter disc is provided with a positioning hole, and the cutter disc is sleeved on the outer periphery of the mounting protrusion through the positioning hole.

[0011] In the above metal coil slitting machine, a positioning sleeve is further arranged between the cutter disc and the mounting disc, the side end surface of the positioning sleeve towards the cutter disc is provided with a positioning protrusion, the positioning protrusion is inserted between the positioning hole and the mounting protrusion, and a plurality of inner-outer through long grooves are formed in the positioning protrusion along the circumferential direction of the positioning protrusion to provide a space for the contraction deformation of the positioning protrusion.

[0012] In the above metal coil slitting machine, the inner hole size of the positioning protrusion is greater than the outer diameter size of the mounting protrusion, and the outer diameter size of the positioning protrusion is greater than the inner hole size of the mounting hole.

[0013] In the above metal coil slitting machine, the outer periphery of the positioning protrusion is further provided with an avoiding clamping groove. The length of the positioning protrusion is extended and the deformation amount of the positioning protrusion is increased by arranging the avoiding clamping groove.

[0014] In the above metal coil slitting machine, the cutter disc assembly comprises a connecting cover, a transmission shaft, and a shaft seat, the shaft seat is fixedly arranged on the cutter seat, the transmission shaft is rotatably arranged on the shaft seat, the mounting disc, the cutter disc, and the positioning sleeve are rotatably arranged on the transmission shaft, the connecting cover is fixedly arranged on the outer side end surface of the mounting protrusion, the connecting cover and the transmission shaft are detachably butted through a plug-in structure, and the driving mechanism is in transmission connection with the transmission shaft.

[0015] In the metal coil cutting machine, the insertion structure comprises a plug arranged on the inner side end face of the connecting cover and a socket arranged on the outer side end of the transmission shaft, the plugs are arranged along the circumference of the connecting cover, the sockets are arranged along the circumference of the transmission shaft, the positions of the sockets correspond to the positions of the plugs one by one, and the sizes of the sockets are matched with the sizes of the plugs.

[0016] In the metal coil cutting machine, the connecting cover and the mounting protrusion are connected by fasteners, and the positioning sleeve, the cutter disc and the mounting disc are connected by fasteners.

[0017] In the metal coil cutting machine, a plurality of guide rails are fixedly arranged on the rack and arranged along the length direction of the coil, each cutter disc assembly is slidably arranged on the guide rails by a sliding block, a screw rod assembly corresponding to each cutter disc assembly is arranged on the rack and used for driving each cutter disc assembly to slide along the guide rails to adjust the cutting width, and a locking mechanism is arranged on each cutter disc assembly and used for locking the position of the cutter disc assembly.

[0018] In the metal coil cutting machine, the locking mechanism comprises a locking block, a mounting clamping groove is arranged on the cutter seat along the sliding direction of the sliding block, the sliding block is arranged in the mounting clamping groove, the guide rail passes through the mounting clamping groove, the sliding block abuts against the top of the guide rail and slides along the guide rail, the locking block is slidably arranged on the sliding block along the movement direction of the sliding block, the contact surface between the locking block and the sliding block is an inclined surface inclined along the sliding direction, a locking screw is rotatably arranged on the locking block, the locking screw is threadedly connected with the sliding block, and rotating the locking screw drives the locking block to translate relative to the sliding block along the sliding direction, so that the bottom surface of the locking block is pressed on the guide rail.

[0019] In the metal coil cutting machine, a protrusion is further arranged in the mounting clamping groove, the protrusion separates the mounting clamping groove into an upper chamber and a lower chamber, the guide rail is located in the lower chamber, an installation portion is further arranged on the inner side surface of the sliding block and embedded in the upper chamber, the locking mechanism further comprises a locking shaft rotatably arranged on the cutter seat, an axial locking plane is arranged on the outer periphery of the locking shaft, the upper end surface of the sliding block is attached to the locking plane, and a driving mechanism is further arranged on the cutter seat and used for driving the locking shaft to rotate, so that the outer arc surface of the locking shaft is attached to the sliding block to drive the bottom surface of the installation portion to abut against the protrusion, and the sliding block and the locking block are integrally lowered relative to the cutter seat.

[0020] Compared with the prior art, the metal coil cutting machine has the following beneficial effects:

[0021] 1. Using the mounting surface of the cutter head and the mounting plate as the cutting surface, after a period of use, when the cutting surface is worn, the worker can process the cutting surface without adjusting the height of the cutter head. The cutter head is still fixed on the original mounting plate, and the reprocessed mounting surface is used as the new cutting surface. The cutting surfaces of the two sets of cutter heads can still fit tightly together without the need for secondary adjustment of the position of the cutting surface. The installation process is simple and quick.

[0022] 2. When installing the cutter head, first place the cutter head onto the mounting protrusion of the mounting plate. Since the inner diameter of the cutter head is much larger than the outer diameter of the mounting protrusion, the installation is very easy. To address the positioning accuracy issue between the cutter head and the mounting protrusion, this invention designs a positioning sleeve. The positioning protrusion on the positioning sleeve is inserted between the cutter head and the mounting protrusion. Since the inner diameter of the positioning protrusion is larger than the outer diameter of the mounting protrusion, and the outer diameter is larger than the inner diameter of the mounting hole, the long groove on the positioning protrusion provides space for shrinkage and deformation, allowing the positioning protrusion to be tightly embedded between the cutter head and the mounting protrusion, ensuring the installation accuracy of the cutter head and the mounting plate, and also making the installation and removal of the cutter head more convenient and quick.

[0023] 3. The cutting width is adjusted by driving each cutter head assembly to slide along the guide rail through the lead screw assembly. Due to the gaps in the connection points such as the connection end between the lead screw assembly and the slider, and the connection end between the lead screw and the lead screw motor, the cutter head will wobble slightly during high-speed rotation, resulting in an uneven cutting surface. Therefore, a locking mechanism is needed to lock the position of the cutter head assembly. The locking mechanism locks the cutter head assembly on the guide rail, improving the cutting accuracy. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the cutter head assembly of the present invention mounted on the frame;

[0026] Figure 3 This is a cross-sectional view of the positional structure of the two sets of cutterhead assemblies of the present invention;

[0027] Figure 4 This is a schematic diagram of the cutter head assembly of the present invention;

[0028] Figure 5 This is an enlarged cross-sectional view of the position structure of the cutter head of the present invention;

[0029] Figure 6 This is an enlarged sectional view of the mounting position of the positioning protrusion of the present invention;

[0030] Figure 7 This is a schematic diagram of the installation of the cutter head assembly of the present invention;

[0031] Figure 8 This is a schematic diagram of the positioning sleeve of the present invention;

[0032] Figure 9 This is a schematic diagram of the connecting cover of the present invention;

[0033] Figure 10 This is a schematic diagram of the tool holder of the present invention.

[0034] In the diagram, 1. Coil material; 2. Blade holder; 3. Blade disc; 4. Mounting disc; 5. Rubber sleeve; 6. Mounting protrusion; 7. Positioning sleeve; 8. Positioning protrusion; 9. Long groove; 10. Clearance slot; 11. Connecting cover; 12. Drive shaft; 13. Shaft seat; 14. Pin; 15. Insertion hole; 16. Guide rail; 17. Slider; 18. Locking block; 19. Mounting slot; 20. Protrusion; 21. Locking shaft; 22. Frame. Detailed Implementation

[0035] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0036] like Figures 1 to 3 As shown, the metal coil slitting machine of the present invention includes a frame 22 and a conveying device and a cutting device disposed on the frame 22. The cutting device includes a plurality of slitting pieces spaced apart along the width direction of the coil 1. The conveying device is used to transport the metal coil 1 through the cutting device so that the metal coil 1 can be cut into a plurality of strips by the slitting pieces. The slitting pieces include upper and lower sets of cutter disc assemblies, which are centrally symmetrically distributed, and the metal coil 1 is located between the two sets of cutter disc assemblies.

[0037] like Figure 4 As shown, the cutter head assembly includes a cutter holder 2, a cutter head 3 rotatably mounted on the cutter holder 2, and a drive mechanism for driving the cutter head 3 to rotate. A mounting plate 4 is rotatably mounted on the cutter holder 2, and the cutter head 3 is fixedly mounted on the mounting plate 4. The contact surface between the cutter head 3 and the mounting plate 4 is the mounting surface of the cutter head 3, and the mounting surfaces of the two cutter heads 3 interlock vertically to form a cutting position. A rubber sleeve 5 is fitted around the outer periphery of the mounting plate 4, and the outer wheel surface of the cutter head 3 of one set of cutter head assemblies abuts against the rubber sleeve 5 of the other set of cutter head assemblies.

[0038] Using the mounting surfaces of the cutter head 3 and mounting plate 4 as the cutting surfaces, when the cutting surfaces become worn after a period of use, the workers can process the cutting surfaces without needing shims or other accessories. The cutter head 3 can then be fixed onto the original mounting plate 4, and the reprocessed mounting surfaces can be used as the new cutting surfaces. The cutting surfaces of the two sets of cutter heads 3 can still mesh tightly without needing to adjust the position of the cutting surfaces again. The installation process is simple and quick.

[0039] The rack 22 is provided with a lifting drive adjusting mechanism for adjusting the height of one set of cutter disc assemblies, so as to adjust the distance between the upper and lower sets of cutter disc assemblies, and make the upper and lower cutter discs 3 in the engaged state, and the conveying device transports the metal coil 1 into the space between the upper and lower sets of cutter disc assemblies for cutting. According to the thickness of the metal coil 1, the upper and lower cutter discs 3 are engaged in the cutting state with a preferred upper and lower dislocation engagement size of 0.5 mm.

[0040] As shown in Figure 5 Fig. 1, the mounting disc 4 is provided with a mounting protrusion 6 on the side end face facing the cutter disc 3, and the cutter disc 3 is provided with a positioning hole, and the cutter disc 3 is sleeved on the outer periphery of the mounting protrusion 6 through the positioning hole. Figure 6 As shown in Figure 8 Fig. 2, the cutter disc 3 and the mounting disc 4 are further provided with a positioning sleeve 7, and the positioning sleeve 7 is provided with a positioning protrusion 8 on the side end face facing the cutter disc 3, and the positioning protrusion 8 is inserted between the positioning hole and the mounting protrusion 6.

[0041] As shown in Fig. 3, the positioning protrusion 8 is provided with a plurality of long grooves 9 penetrating in and out along the circumferential direction, which provides a space for the contraction deformation of the positioning protrusion 8. The inner hole size of the positioning protrusion 8 is larger than the outer diameter size of the mounting protrusion 6, and the outer diameter size of the positioning protrusion 8 is larger than the inner hole size of the mounting hole. The outer periphery of the positioning protrusion 8 is further provided with an avoiding clamping groove 10. The length of the positioning protrusion 8 is extended by the avoiding clamping groove 10, and the deformation amount of the positioning protrusion 8 is increased.

[0042] Figure 7 As shown in Fig. 4, the cutter disc assembly includes a connecting cover 11, a transmission shaft 12, and a shaft seat 13. The shaft seat 13 is fixedly arranged on the cutter seat 2, the transmission shaft 12 is rotatably arranged on the shaft seat 13, the mounting disc 4, the cutter disc 3, and the positioning sleeve 7 are rotatably arranged on the transmission shaft 12, the connecting cover 11 is fixedly arranged on the outer side end face of the mounting protrusion 6, the connecting cover 11 and the transmission shaft 12 are detachably butted through a plug-in structure, and the driving mechanism is in transmission connection with the transmission shaft 12.

[0043] AsFigure 9 As shown in the figure, the plug-in structure includes a plug 14 arranged on the inner side end face of the connecting cover 11, a socket 15 arranged on the outer side end of the transmission shaft 12, a plurality of plugs 14 arranged along the circumference of the connecting cover 11, a plurality of sockets 15 arranged along the circumference of the transmission shaft 12, the position of the socket 15 corresponds to the position of each plug 14, and the size of the socket 15 is matched with the size of the plug 14. The connecting cover 11 and the mounting protruding part 6 are connected by fasteners, and the positioning sleeve 7, the cutter disc 3, and the mounting disc 4 are connected by fasteners.

[0044] As shown in the figure, Figure 2 As shown in the figure, a plurality of guide rails 16 are fixedly arranged on the rack 22, and the guide rails 16 are arranged along the length direction of the material 1. Each cutter disc assembly is slidably arranged on the guide rail 16 through a sliding block 17. The rack 22 is also provided with a screw rod assembly corresponding to each cutter disc assembly, which is used to drive each cutter disc assembly to slide along the guide rail 16 to adjust the cutting width. Each cutter disc assembly is provided with a locking mechanism for locking the position of the cutter disc assembly.

[0045] As shown in the figure, Figure 4 As shown in the figure, the locking mechanism includes a locking block 18. The cutter holder 2 is provided with a mounting clamping groove 19 arranged along the sliding direction of the sliding block 17. The sliding block 17 is arranged in the mounting clamping groove 19, and the guide rail 16 passes through the mounting clamping groove 19. The sliding block 17 abuts against the top of the guide rail 16 and slides along the guide rail 16. The locking block 18 is slidably arranged on the sliding block 17 along the movement direction of the sliding block 17. The contact surface between the locking block 18 and the sliding block 17 is an inclined surface inclined along the sliding direction. A locking screw is rotatably arranged on the locking block 18, and the screw is threadedly connected with the sliding block 17. Rotating the locking screw drives the locking block 18 to translate along the sliding direction relative to the sliding block 17, so that the bottom surface of the locking block 18 is pressed against the guide rail 16.

[0046] As shown in the figure, Figure 10 As shown in the figure, the mounting clamping groove 19 is also provided with a protruding part 20, which separates the mounting clamping groove 19 into an upper chamber and a lower chamber. The guide rail 16 is located in the lower chamber. The inner side surface of the sliding block 17 is also provided with a mounting part, which is embedded in the upper chamber. The locking mechanism further includes a locking shaft 21, which is rotatably arranged on the cutter holder 2. The outer periphery of the locking shaft 21 is provided with a locking plane penetrating along the axial direction. The upper end surface of the sliding block 17 is in contact with the locking plane. The cutter holder 2 is also provided with a driving mechanism for driving the locking shaft 21 to rotate, so that the outer arc surface of the locking shaft 21 is in contact with the sliding block 17 to drive the bottom surface of the mounting part to abut against the protruding part 20, so that the sliding block 17 and the locking block 18 are lowered as a whole relative to the cutter holder 2.

[0047] The cutting width is adjusted by driving each cutter disc assembly to slide along the guide rail 16 by the screw rod assembly. Since there are gaps in the connecting parts such as the connecting end of the screw rod assembly and the sliding block 17, the connecting end of the screw rod and the screw rod motor, etc., the cutter disc 3 will slightly shake in the process of high-speed rotation due to the existence of these gaps, resulting in uneven cutting surface. Therefore, a locking mechanism is needed to lock the position of the cutter disc assembly. The cutter disc assembly is locked on the guide rail 16 by the locking mechanism, thereby improving the cutting precision.

[0048] It should be understood that in the claims, the specification and the like of the present application, all of the terms "comprising", "comprises", "include" or "includes" are to be construed in an open-ended manner, that is, as "including but not limited to", and not in a limiting or exclusive sense.

[0049] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. A metal coil slitting machine, characterized in that, The device includes a frame (22) and a conveying device and a cutting device arranged on the frame (22). The cutting device includes several slitting pieces arranged at intervals along the width direction of the coil (1). The conveying device is used to transport the metal coil (1) through the cutting device so that the metal coil (1) can be cut into several strips by each slitting piece. The slitting piece includes two sets of upper and lower blade assemblies. The two sets of blade assemblies are centrally symmetrically distributed. The metal coil (1) is located between the two sets of blade assemblies. The blade assembly includes a blade holder (2), a blade (3) rotatably arranged on the blade holder (2), and a driving mechanism for driving the blade (3) to rotate. A mounting plate (4) is rotatably arranged on the blade holder (2). The blade (3) is fixedly arranged on the mounting plate (4). The contact surface between the blade (3) and the mounting plate (4) is the mounting surface of the blade (3). The mounting surfaces of the two blades (3) are correspondingly engaged to form a cutting position. The frame (22) is fixedly provided with several guide rails (16), which are arranged at intervals along the length of the roll (1). Each cutter head assembly is slidably mounted on the guide rail (16) via a slider (17). The frame (22) is also provided with a screw assembly corresponding to each cutter head assembly, which is used to drive each cutter head assembly to slide along the guide rail (16) to adjust the cutting width. Each cutter head assembly is provided with a locking mechanism to lock the position of the cutter head assembly. The locking mechanism includes a locking block (18), and the tool holder (2) has an installation slot (19) set along the sliding direction of the slider (17). The slider (17) is set in the installation slot (19), and the guide rail (16) passes through the installation slot (19). The slider (17) abuts against the top of the guide rail (16) and slides along the guide rail (16). The locking block (18) is slidably set on the slider (17) along the movement direction of the slider (17). The contact surface between the locking block (18) and the slider (17) is an inclined surface that is inclined along the sliding direction. A locking screw is rotatably provided on the locking block (18). The screw is threadedly connected to the slider (17). Rotating the locking screw drives the locking block (18) to translate relative to the slider (17) along the sliding direction so that the bottom surface of the locking block (18) is pressed against the guide rail (16). The mounting slot (19) is also provided with a protrusion (20), which divides the interior of the mounting slot (19) into an upper chamber and a lower chamber. The guide rail (16) is located in the lower chamber. The inner side of the slider (17) is also provided with an installation part, which is embedded in the upper chamber. The locking mechanism also includes a locking shaft (21), which is rotatably mounted on the tool holder (2). The outer periphery of the locking shaft (21) is provided with a locking plane that runs through the axial direction. The upper end face of the slider (17) is in contact with the locking plane. The tool holder (2) is also provided with a driving mechanism for driving the locking shaft (21) to rotate so that the outer arc surface of the locking shaft (21) is in contact with the slider (17) and the bottom surface of the installation part is against the protrusion (20) so that the slider (17) and the locking block (18) descend relative to the tool holder (2) as a whole.

2. The metal coil slitting machine according to claim 1, characterized in that, The outer periphery of the mounting plate (4) is fitted with a rubber sleeve (5), and the outer wheel surface of the cutter disc (3) of one set of cutter disc assemblies abuts against the rubber sleeve (5) of another set of cutter disc assemblies.

3. A metal coil slitting machine according to claim 1, characterized in that, The mounting plate (4) has a mounting protrusion (6) on one side of the cutter head (3). The cutter head (3) has a positioning hole. The cutter head (3) is fitted onto the outer periphery of the mounting protrusion (6) through the positioning hole. A positioning sleeve (7) is also provided between the cutter head (3) and the mounting plate (4). A positioning protrusion (8) is provided on one side of the positioning sleeve (7) facing the cutter head (3). The positioning protrusion (8) is inserted between the positioning hole and the mounting protrusion (6). The positioning protrusion (8) has several through slots (9) along its circumference to provide space for the positioning protrusion (8) to shrink and deform.

4. A metal coil slitting machine according to claim 3, characterized in that, The inner diameter of the positioning protrusion (8) is larger than the outer diameter of the mounting protrusion (6), and the outer diameter of the positioning protrusion (8) is larger than the inner diameter of the mounting hole.

5. A metal coil slitting machine according to claim 3, characterized in that, A clearance groove (10) is also provided on the outer periphery of the positioning protrusion (8).

6. A metal coil slitting machine according to claim 3, characterized in that, The cutter head assembly includes a connecting cover (11), a drive shaft (12), and a shaft seat (13). The shaft seat (13) is fixedly mounted on the cutter head (2), and the drive shaft (12) is rotatably mounted on the shaft seat (13). The mounting plate (4), cutter head (3), and positioning sleeve (7) are rotatably mounted on the drive shaft (12). The connecting cover (11) is fixedly mounted on the outer end face of the mounting protrusion (6). The connecting cover (11) and the drive shaft (12) are detachably connected through a plug-in structure. The drive mechanism is connected to the drive shaft (12) in a transmission connection.

7. A metal coil slitting machine according to claim 6, characterized in that, The plug-in structure includes a pin (14) disposed on the inner end face of the connecting cover (11) and a hole (15) opened on the outer end of the drive shaft (12). A plurality of pins (14) are arranged at intervals along the circumference of the connecting cover (11), and a plurality of holes (15) are arranged at intervals along the circumference of the drive shaft (12). The position of the hole (15) corresponds one-to-one with the position of each pin (14), and the size of the hole (15) is adapted to the size of the pin (14).

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