CN118002844B

CN118002844B - Automatic shearing machine for metal plates

Info

Publication number: CN118002844B
Application number: CN202410415953.8A
Authority: CN
Inventors: 宋文杰; 吕兆海; 宋文盛; 高友娟
Original assignee: Jiangsu Ruide Machinery Co ltd
Current assignee: Jiangsu Ruide Machinery Co ltd
Filing date: 2024-04-08
Publication date: 2024-06-25
Anticipated expiration: 2044-04-08

Abstract

The invention belongs to the technical field of plate shearing, in particular to an automatic metal plate shearing machine which comprises a machine base, wherein a pair of shells are fixedly connected to the top of the machine base, a cover plate is fixedly connected to the top ends of the shells, a first transmission shaft and a second transmission shaft are rotatably arranged between the shells, the first transmission shaft is arranged below the second transmission shaft, belts are arranged at two ends of the second transmission shaft in a transmission manner, a shearing assembly is arranged at the other end, far away from the second transmission shaft, of the belts, and a cutter is arranged at the inner cavity of the shell. According to the automatic metal plate shearing machine, when the extension rod slides to the proper position with the longest distance, the extrusion force of the extension rod is released, and the extension rod slowly extrudes the cutter to complete shearing, so that the optimal shearing distance is ensured, the condition of high pushing force caused by long distance is avoided, the condition of high shearing speed is avoided, and the metal plate is prevented from generating small cracks due to the fact that the shearing speed is high.

Description

Automatic shearing machine for metal plates

Technical Field

The invention belongs to the technical field of plate shearing, and particularly relates to an automatic metal plate shearing machine.

Background

Along with the continuous high-speed growth of the economy in China and the increasing of the competition between enterprises and the increasing of the human resource cost, the demand of society for various plates is continuously increased, the efficiency of plate processing is also put forward higher requirements, a shearing machine is usually used for cutting the metal plates, the metal plates can be cut according to a certain size and shape, and the metal plate cutting machine is one of indispensable equipment in the metal processing industry.

The automatic shearing machine needs to cut the plate during production, such as high-efficiency shearing equipment for plates and shearing methods thereof disclosed by publication No. CN116604091B, and the automatic shearing machine comprises a top plate, a first side plate, a shearing production structure and a second side plate, wherein the top plate, the first side plate and the second side plate are fixedly connected, the shearing production structure is arranged at the centers of the top plate, the first side plate and the second side plate, the shearing production structure is used for shearing treatment of the plates, and meanwhile, the shearing production structure can carry out linkage type integrated production work.

According to the technical scheme, the situation that a plurality of shearing plates with different sizes are mutually matched for processing is solved in a part of processing workshops, for example, in a welding workshop, a large bottom plate is usually used as a reference, and then a plurality of smaller plates are welded on the surface of the shearing plates.

Disclosure of Invention

In order to overcome the deficiencies of the prior art, at least one technical problem presented in the background art is solved.

The technical scheme adopted for solving the technical problems is as follows: the invention discloses an automatic metal plate shearing machine, which comprises a machine base, wherein a pair of shells are fixedly connected to the top of the machine base, a cover plate is fixedly connected to the top ends of the pair of shells, a first transmission shaft and a second transmission shaft are rotatably arranged between the pair of shells, the first transmission shaft is arranged below the second transmission shaft, belts are arranged at the two ends of the second transmission shaft in a transmission manner, a shearing assembly is arranged at the other end of the belt, which is far away from the second transmission shaft, the top ends of the shearing assemblies are slidably connected with a pressure plate, the shearing assembly is used for shearing metal plates in an indefinite length manner, and a cutter is arranged at the inner cavity of the shell; during operation, different metal plates are sheared, the irregular shearing of different metals can be finished only by manual assistance or guidance of a high-grade engineer, and the troublesome problem exists.

Further, the shearing assembly comprises a rotating rod, the output end of the rotating rod is fixedly connected with a deflection piece, the outer side of the deflection piece is connected with a frame body in a sliding manner, the top end of the frame body is fixedly connected with a sleeve, the top end of the frame body is rotationally connected with a shaft disc through a torsion spring, and a length adjusting assembly is arranged in the sleeve and used for adjusting the shearing length; during operation, in the process of shearing the metal plate, the belt rotates to drive the deflection piece to rotate, the deflection piece rotates to be in contact with the frame body, the frame body compresses the torsion spring to drive the sleeve to rotate by taking the axis of the shaft disc as a round point, the sleeve rotates to drive the length adjusting assembly to rotate until the length adjusting assembly is in contact with the cutter, and the cutter is pushed to cut.

Further, the length adjusting assembly comprises a screw, the screw is rotationally connected inside the sleeve, the top end of the screw is connected with a stretching rod through threads, the stretching rod is slidably connected inside the sleeve, a servo motor is installed at one end, far away from the stretching rod, of the screw, an infrared sensor is installed at the position of a deflection piece on the inner wall of the shell, and the infrared sensor is connected with the servo motor through an electric signal; during operation, the deflection piece drives sleeve pivoted in-process, every round of deflection piece just can accomplish the action of sheltering from to infrared inductor, through the procedure of predetermineeing between infrared inductor and the servo motor, specifically, set the distance of extension pole to cutter as X, servo motor drive screw rod pivoted number of turns at every turn is M, and every round of screw rod rotates displacement distance that drives the extension pole is L, and servo motor's the start-up number of times N just can be by the formula when accomplishing the shearing: on the other hand, the method counts the shielding times A of the infrared sensor, Designing a trigger value K for starting a servo motor whenWhen the servo motor is triggered once, it can be understood that when the shearing is completed, the total shielded times P of the infrared sensor can be represented by the formula: The method comprises the following steps: Wherein X, L is the fixed value, and can accomplish the control to P through predetermineeing the value that changes M, K, owing to can learn, after infrared inductor triggers K enough times, servo motor drive screw rod rotates M circle to drive the extension pole and slide M L distance in the sleeve, until extension pole and cutter contact and promote the cutter to accomplish the action of cutting down, through predetermineeing M, K's numerical value, change into another numerical value after once cutting is accomplished, can accomplish the switching to shearing length, thereby realize the effect that single machine circulation sheared different sizes panel.

Further, an anti-deflection component is arranged on the inner side of the deflection piece and comprises a hook body, a clamping head is fixedly connected to the top end of the hook body, a baffle is connected to one side, far away from the clamping head, of the hook body in a folding manner, a guide plate is fixedly connected to the middle of the baffle, and a shell is sleeved on the outer side of the guide plate; during operation, as part of the metal sheet is made of special materials and has a smooth outer surface, the friction force is small during transmission, deflection is easy to occur, the subsequent shearing of the cutter is affected accurately, the belt rotates to drive the rotating rod to move, the deflection piece synchronously moves along with the rotation of the rotating rod, the deflection piece inclines for a certain angle, the deflection piece extrudes the hook body during rotation, the hook body moves towards the direction close to the baffle, the hook body inclines inwards, the hook body collides with the clamping head to move, the clamping head gradually moves towards the middle part, and the clamping head supports the metal sheet transmitted from the middle part from the outer side, so that the deflection problem cannot occur during the transmission, the shearing precision is improved, and the error is reduced; the casing is used for restricting the displacement angle of collude the body, and the baffle is through protruding in the casing middle part, and is used for hanging the baffle, prevents that the baffle from appearing becoming flexible.

Further, the hook body is in an arc shape, the hook body is inserted into the inner cavity of the baffle, and a notch corresponding to the baffle is formed in the shell; during operation, through the arc limit setting of collude the body, make collude the body and bigger the sheet metal part that the parcel can cover, can also reduce the chuck from outside to inside in the twinkling of an eye impact force simultaneously, play the effect of buffering.

Further, the clamping head is made of rubber, and the shell is positioned on the inner wall of the shell; during operation, the rubber material of the clamping head ensures that the clamping head can not collide with the metal plate when supporting the metal plate, so that the defect can not occur on the surface of the metal plate; the casing is fixed at the inner wall of shell and is used for promoting stability performance.

Further, a pushing component is arranged in the pressure plate and comprises a torsion spring, a middle sliding plate is fixedly connected to the top end of the torsion spring, a pushing piece is fixedly connected to the bottom of the middle sliding plate, and a tightening piece is fixedly connected to the middle of the pushing piece; when the device is used, after shearing is completed, the residual metal plate can be continuously transmitted, when the residual metal plate is pushed to the bottom of the cutter, the residual metal plate can be blocked by the cutter which is not lifted and reset at the moment, deformation or bending is easy to cause, when the metal plate is bent to the maximum limit value, the metal plate is broken, by arranging the device, the stretching rod is enabled to downwards displace due to the fact that the rotating spring rotates to extrude the screw rod, the stretching rod downwards extends, the stretching rod gradually acts with the tightening piece, the tightening piece downwards drives the pushing piece to synchronously displace, the pushing piece downwards drives the sliding plate to downwards, the sliding plate in the pulling of the pushing piece acts along the middle of the pressing plate, the torsion spring is used for buffering the sliding plate, and therefore the device is enabled to have an automatic smoothing function, the function of rapid pushing is achieved, and the service life of the metal plate is guaranteed.

Further, the bottom end of the pushing piece is connected with a pair of clamping plates in a sliding manner, the clamping plates are divided into an upper part and a lower part, the top of the clamping plate at the upper part is fixedly connected with a tension spring, and the top end of the tension spring is fixedly connected with a cutter; during operation, because contact with sheet metal between the upper and lower two parts of splint, cause the problem that splint are difficult to smooth transmission, consequently through setting up this embodiment, when sheet metal position to splint upper and lower two parts between, the cutter receives the extension rod influence and slowly down the displacement, and sheet metal self thickness props up the gap between splint upper and lower two parts, and the cutter cuts down pulling extension spring deformation, and extension spring pulls upper portion splint and lifts upward to promote the gap of passing through, reach the effect of sheet metal's smooth transportation.

Further, a chute is formed in the pressure plate, a shaft lever is fixedly connected to the center of the pressure plate, and the shaft lever is in sliding connection with the torsion spring; during operation, through the setting of axostylus axostyle and spout, guarantee the normal implementation of torsional spring, can normally retrieve the effect after promoting well slide work to accomplish.

Further, the top of the cutter is in a slope shape, the bottom end of the cutter is slidably connected with a cutter holder, the cutter is slidably connected at the inner cavity of the shell, and the cutter holder is fixedly connected at the bottom end of the inner cavity of the shell; during operation, through the setting that the cutter top is the slope face for cooperate with the extension rod better, guarantee that the cutter slowly goes out the sword along with the contact of slope face, promote fault-tolerant rate, promote sheet metal's degree of accuracy.

The beneficial effects of the invention are as follows:

1. According to the automatic metal plate shearing machine disclosed by the invention, the length of the shearing assembly is changed after the shearing assembly is triggered, the length of the shearing assembly is promoted to be prolonged once after the transmission shaft rotates for one circle, the cutting shaft is indirectly contacted with the cutting knife through the change of the size, the cutting speed of the cutting knife is changed, the cutting knife is sheared by rotating the transmission shaft for one circle and shearing the cutting knife when the transmission shaft rotates for one half, and then irregular cutting operation is carried out when the transmission shaft rotates for two circles and one half, so that the shearing work efficiency is improved, and the requirement of partially difficultly treated metal plate pieces is met.

2. According to the automatic metal plate shearing machine, the follow-up shearing accuracy of the cutter is affected, the belt rotates to drive the rotating rod to move, the deflection piece moves synchronously along with the rotation of the rotating rod, the deflection piece inclines by a certain angle, the deflection piece extrudes the hook body to act when rotating, the hook body moves towards the direction close to the baffle, the hook body inclines inwards, the hook body impacts the clamping head to move, the clamping head moves towards the middle gradually, the clamping head supports the metal plate conveyed from the outer side to the middle, so that the problem of deflection cannot occur in the conveying process, the shearing accuracy is improved, and the error is reduced.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of the entire present invention;

Figure 2 is a front view of the cutter of the present invention;

FIG. 3 is an elevational view of the platen of the present invention;

FIG. 4 is an exploded view of the interior of the structure of the rotary lever of the present invention;

FIG. 5 is an axial view of the present invention;

FIG. 6 is a front view of the frame of the present invention;

FIG. 7 is an internal schematic view of the guide plate of the present invention;

FIG. 8 is a front view of the skateboard of the present invention;

FIG. 9 is a partial schematic view of the torsion spring of the present invention.

In the figure: 1. a base; 2. a housing; 3. a cover plate; 4. a first transmission shaft; 5. a transmission shaft II; 6. a belt; 7. a pressure plate; 8. a cutter; 9. a tool apron; 61. a rotating rod; 62. a deflector; 63. a frame; 64. a shaft disc; 65. a sleeve; 66. a screw; 67. a stretching rod; 621. a hook body; 622. a baffle; 623. a guide plate; 624. a chuck; 625. a housing; 70. a torsion spring; 71. a middle slide plate; 72. pushing the piece; 73. a tightening member; 74. a tension spring; 75. and (3) clamping plates.

Detailed Description

The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.

The automatic metal plate shearing machine comprises a machine base 1, wherein the top of the machine base 1 is fixedly connected with a pair of shells 2, the top ends of the pair of shells 2 are fixedly connected with a cover plate 3, a first transmission shaft 4 and a second transmission shaft 5 are rotatably arranged between the pair of shells 2, the first transmission shaft 4 is arranged below the second transmission shaft 5, two ends of the second transmission shaft 5 are respectively provided with a belt 6 in a transmission manner, the other end of the belt 6, which is far away from the second transmission shaft 5, is provided with a shearing assembly, the top end of the shearing assembly is slidably connected with a pressure plate 7, the shearing assembly is used for conducting adjustable fixed length shearing on special metal plates, and a cutter 8 is arranged at the inner cavity of the shell 2;

As shown in fig. 1-3, during working, in the process of shearing metal plates, because the processing requirements of the metal plates with different specifications are different, a relatively troublesome situation can occur, by using the embodiment of the invention, the transmission shaft one 4 and the transmission shaft two 5 are started through a program, then the metal plate workpiece is pushed between the transmission shaft one 4 and the transmission shaft two 5, the metal plates are gradually conveyed to the position of the cutter 8 under the action of the extrusion force of the transmission shaft one 4 and the transmission shaft two 5, the belt 6 is influenced by the transmission shaft two 5 to rotate, the belt 6 rotates to be contacted with the shearing component, the shearing component is triggered to change the length, the length of the shearing component is prolonged once after the transmission shaft two 5 rotates once, the cutter 8 is pushed to be contacted with the cutter 8 through the change of the size, the rotation circle number of the transmission shaft two 5 is controlled, the cutter 8 is sequentially sheared according to the preset cutting length, the cutter 8 is sheared by rotating one circle of the cutter 8 respectively, the cutter is sheared when the transmission shaft two rotates one circle by one half, and then the cutter is sheared when the transmission shaft two circles are rotated again, the cutter is sheared by two circles, the irregular cutter is sheared when the cutter is rotated again, the cutter is one circle is one half, the cutter is required, the working efficiency is required to meet the requirement of the shearing requirement, and the shearing requirement is difficult to meet.

The shearing assembly comprises a rotating rod 61, a deflection piece 62 is fixedly connected to the output end of the rotating rod 61, a frame 63 is connected to the outer side of the deflection piece 62 in a sliding manner, a sleeve 65 is fixedly connected to the top end of the frame 63, a shaft disc 64 is rotatably connected to the top end of the frame 63 through a torsion spring, and a length adjusting assembly is installed in the sleeve 65 and used for adjusting the shearing length;

as shown in fig. 5-6, in the working process, during the shearing process of the metal sheet, the belt 6 rotates to drive the deflection piece 62 to rotate, the deflection piece 62 rotates to be in contact with the frame 63, the frame 63 compresses the torsion spring to drive the sleeve 65 to rotate by taking the axle center of the axle disc 64 as a round point, the sleeve 65 rotates to drive the length adjusting component to rotate until the length adjusting component contacts with the cutter 8, and the cutter 8 is pushed to cut.

The length adjusting assembly comprises a screw 66, the screw 66 is rotatably connected inside a sleeve 65, the top end of the screw 66 is connected with a stretching rod 67 through threads, the stretching rod 67 is slidably connected inside the sleeve 65, one end of the screw 66, which is far away from the stretching rod 67, is provided with a servo motor, the inner wall of the shell 2 is provided with an infrared sensor at the position of the deflection piece 62, and the infrared sensor is connected with the servo motor through an electric signal;

As shown in fig. 6, in the operation process, in which the deflector 62 drives the sleeve 65 to rotate, the shielding action on the infrared sensor can be completed once when rotating one turn of the deflector 62, specifically, the distance from the extension rod 67 to the cutter 8 is set as X by presetting the program between the infrared sensor and the servo motor, the number of turns of the servo motor driving the screw 66 each time is M, the displacement distance of the screw 66 driving the extension rod 67 each time is L, and the number of times of starting the servo motor when completing cutting can be represented by the formula: the method comprises the steps of obtaining, on the other hand, counting the shielding times A of the infrared sensor, designing a trigger value K for starting a servo motor, and when When the servo motor is triggered once, it can be understood that when the shearing is completed, the total shielded times P of the infrared sensor can be represented by the formula: The method comprises the following steps: Wherein X, L is a fixed value, and the control of P can be completed by presetting the value of M, K, as it can be known that when the infrared sensor is triggered K times, the servo motor drives the screw 66 to rotate M circles, thereby driving the extension rod 67 to slide M times L distance in the sleeve 65 until the extension rod 67 contacts with the cutter 8 and pushes the cutter 8 to complete the cutting action, and the value of M, K is preset, and the value is changed into another value after one cutting is completed, so that the switching of the shearing length can be completed, and the effect of circularly shearing boards with different sizes by a single machine can be realized.

The deflection piece 62 is provided with an anti-deflection component inside, the anti-deflection component comprises a hook body 621, the top end of the hook body 621 is fixedly connected with a clamping head 624, one side of the hook body 621 away from the clamping head 624 is connected with a baffle 622 in a folding way, a guide plate 623 is fixedly connected in the middle of the baffle 622, and the outer side of the guide plate 623 is sleeved with a shell 625;

As shown in fig. 5-7, in the process of transferring the metal sheet to the cutter 8, as the material of part of the metal sheet is special and the outer surface is smoother, the friction force is smaller during transfer, and the cutter 8 is easy to deflect, so that the subsequent shearing accuracy of the cutter 8 is affected, the belt 6 rotates to drive the rotating rod 61 to move, the deflection piece 62 synchronously moves along with the rotation of the rotating rod 61, the deflection piece 62 tilts by a certain angle, the deflection piece 62 extrudes the hook 621 during rotation, the hook 621 moves towards the direction close to the baffle 622, the hook 621 tilts inwards, the hook 621 impacts the chuck 624 to move, the chuck 624 gradually moves towards the middle, the chuck 624 centers the metal sheet transferred from the outer side, so that the problem of deflection does not occur in the transfer process, the shearing precision is improved, and the error is reduced; the housing 625 is used for limiting the displacement angle of the hook 621, and the guide plate 623 is protruded from the middle of the housing 625 to suspend the baffle 622, so as to prevent the baffle 622 from loosening.

The hook body 621 is in an arc shape, the hook body 621 is inserted into the inner cavity of the baffle 622, and a notch corresponding to the baffle 622 is formed in the shell 625; the clamping head 624 is made of rubber, and the shell 625 is positioned on the inner wall of the shell 2;

As shown in fig. 7, in operation, the arc edge of the hook 621 is used to make the hook 621 larger and wrap the covered metal plate part, and simultaneously reduce the instant punching force of the chuck 624 from outside to inside, so as to play a role of buffering; the rubber material of the clamping head 624 ensures that the clamping head 624 can not collide with the metal plate when supporting the metal plate, so that the defect can not occur on the surface of the metal plate; the housing 625 is fixed to the inner wall of the casing 2 for enhancing stability.

The pressing plate 7 is internally provided with a pushing component, the pushing component comprises a torsion spring 70, the top end of the torsion spring 70 is fixedly connected with a middle sliding plate 71, the bottom of the middle sliding plate 71 is fixedly connected with a pushing piece 72, and the middle part of the pushing piece 72 is fixedly connected with a tightening piece 73;

As shown in fig. 4-6 and 8, when the cutting is completed, the rest metal plate is continuously conveyed, when the rest metal plate is pushed to the bottom of the cutter 8, the rest metal plate is blocked by the cutter 8 which is not lifted and reset at the moment, deformation or bending is easy to cause, when the metal plate is bent to the maximum extreme value, the metal plate is broken, by arranging the embodiment, the rotating spring rotates to squeeze the screw 66, so that the extension rod 67 is downwards displaced, the extension rod 67 downwards extends, the extension rod 67 gradually acts with the tightening member 73, the tightening member 73 downwards drives the pushing member 72 to synchronously displace, the pushing member 72 downwards drives the middle sliding plate 71 to operate along the middle of the pressing plate 7, the torsion spring 70 buffers the middle sliding plate 71, and the pushing member 72 downwards acts with the metal plate in a pressing mode, so that the equipment is enabled to have an automatic smooth function, the function of quickly pushing is achieved, and the function of guaranteeing the service life of the metal plate is achieved.

The bottom end of the pushing piece 72 is connected with a pair of clamping plates 75 in a sliding manner, the clamping plates 75 are divided into an upper part and a lower part, the top of the upper part of the clamping plates 75 is fixedly connected with a stretching spring 74, and the top end of the stretching spring 74 is fixedly connected with a cutter 8; a chute is formed in the pressure plate 7, a shaft lever is fixedly connected to the center of the pressure plate 7, and the shaft lever is in sliding connection with a torsion spring 70;

As shown in fig. 8-9, during operation, the upper and lower parts of the clamping plate 75 are contacted with the metal plate, so that the clamping plate 75 is difficult to smoothly transfer, therefore, by setting the embodiment, when the metal plate is positioned between the upper and lower parts of the clamping plate 75, the cutter 8 is influenced by the extension rod 67 to slowly move downwards, the thickness of the metal plate itself props up the gap between the upper and lower parts of the clamping plate 75, the cutter 8 downwards cuts and pulls the tension spring 74 to deform, and the tension spring 74 pulls the upper part of the clamping plate 75 to lift upwards, so that the passing gap is lifted, and the effect of smooth transportation of the metal plate is achieved; in operation, the arrangement of the shaft lever and the sliding groove ensures the normal implementation of the torsion spring 70, and the middle sliding plate 71 can be normally recycled after the operation is completed.

As shown in fig. 1, 3 and 6, the top of the cutter 8 is in a slope shape, the bottom end of the cutter 8 is slidably connected with a cutter holder 9, the cutter 8 is slidably connected at the inner cavity of the housing 2, the cutter holder 9 is fixedly connected at the bottom end of the inner cavity of the housing 2, and the cutter holder 9 is used for being matched with the cutter 8 to complete cutting; during operation, through the setting that cutter 8 top is the slope face for cooperate with the extension rod 67 better, guarantee that cutter 8 slowly goes out the sword along with the contact of slope face, promote fault-tolerant rate, promote sheet metal's degree of accuracy.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An automatic metal plate shearing machine is characterized in that: the automatic cutting machine comprises a machine base (1), wherein a pair of shells (2) are fixedly connected to the top of the machine base (1), a pair of cover plates (3) are fixedly connected to the top ends of the shells (2), a pair of transmission shafts I (4) and II (5) are rotatably arranged between the shells (2), the transmission shafts I (4) are arranged below the transmission shafts II (5), belts (6) are arranged at two ends of the transmission shafts II (5) in a transmission mode, the belts (6) are arranged at the other ends of the belts (6) far away from the transmission shafts II (5), cutting assemblies are arranged at the top ends of the cutting assemblies in a sliding mode, the cutting assemblies are used for cutting metal plates in an indefinite length mode, and cutters (8) are arranged at inner cavities of the shells (2);

The shearing assembly comprises a rotating rod (61), a deflection piece (62) is fixedly connected to the output end of the rotating rod (61), a frame body (63) is connected to the outer side of the deflection piece (62) in a sliding mode, a sleeve (65) is fixedly connected to the top end of the frame body (63), a shaft disc (64) is rotatably connected to the top end of the frame body (63) through a torsion spring, and a length adjusting assembly is mounted in the sleeve (65) and used for adjusting the shearing length;

The belt (6) rotates to drive the deflection piece (62) to rotate, the deflection piece (62) rotates to be in contact with the frame body (63), the frame body (63) compresses the torsion spring to drive the sleeve (65) to rotate by taking the axle center of the axle disc (64) as a round point, the sleeve (65) rotates to drive the length adjusting component to rotate until the length adjusting component is in contact with the cutter (8), and the cutter (8) is pushed to cut;

the anti-deflection component is arranged on the inner side of the deflection piece (62), and comprises a hook body (621), a clamping head (624) is fixedly connected to the top end of the hook body (621), a baffle (622) is connected to one side, far away from the clamping head (624), of the hook body (621) in a folding manner, a guide plate (623) is fixedly connected in the middle of the baffle (622), and a shell (625) is sleeved on the outer side of the guide plate (623);

the hook body (621) is in an arc shape, the hook body (621) is inserted into the inner cavity of the baffle plate (622), and a notch corresponding to the baffle plate (622) is formed in the shell (625);

the clamping head (624) is made of rubber, and the shell (625) is positioned on the inner wall of the shell (2);

the length adjusting assembly comprises a screw (66), the screw (66) is rotationally connected inside a sleeve (65), a stretching rod (67) is connected to the top end of the screw (66) through threads, the stretching rod (67) is slidably connected inside the sleeve (65), a servo motor is mounted at one end, far away from the stretching rod (67), of the screw (66), an infrared sensor is mounted on the inner wall of the shell (2) at the position of a deflection piece (62), and the infrared sensor is connected with the servo motor through an electric signal;

In the process that the deflection piece (62) drives the sleeve (65) to rotate, the deflection piece (62) finishes shielding action on the infrared sensor once every turn, the distance from the extension rod (67) to the cutter (8) is set as X through a program between the preset infrared sensor and the servo motor, the number of turns of the servo motor for driving the screw rod (66) every time is M, the displacement distance of the screw rod (66) for driving the extension rod (67) every turn is L, and the starting times N of the servo motor can be represented by a formula when shearing is finished The method comprises the steps of obtaining, counting the shielding times A of an infrared sensor, designing a trigger value K for starting a servo motor, and when/>When the shearing is completed, the total shielded times P of the infrared sensor can be calculated by the formula/>Derived, i.e./>Wherein X, L is a constant value, and the control of P can be accomplished by presetting the value of M, K.

2. An automatic metal sheet shearing machine as defined in claim 1 wherein: the pressing disc (7) is internally provided with a pushing assembly, the pushing assembly comprises a torsion spring (70), a middle sliding plate (71) is fixedly connected to the top end of the torsion spring (70), a pushing piece (72) is fixedly connected to the bottom of the middle sliding plate (71), and a tightening piece (73) is fixedly connected to the middle of the pushing piece (72).

3. An automatic metal sheet shearing machine as defined in claim 2 wherein: the bottom end of the pushing piece (72) is slidably connected with a pair of clamping plates (75), the clamping plates (75) are divided into an upper part and a lower part, an extension spring (74) is fixedly connected to the top of the clamping plates (75) at the upper part, and the top end of the extension spring (74) is fixedly connected with a cutter (8).

4. An automatic metal sheet shearing machine as defined in claim 2 wherein: the inside spout of seting up of pressure disk (7), pressure disk (7) center department rigid coupling has the axostylus axostyle, axostylus axostyle and torsional spring (70) sliding connection.

5. An automatic metal sheet shearing machine as defined in claim 1 wherein: the top of the cutter (8) is in a slope shape, the bottom end of the cutter (8) is slidably connected with a cutter holder (9), the cutter (8) is slidably connected to the inner cavity of the shell (2), and the cutter holder (9) is fixedly connected to the bottom end of the inner cavity of the shell (2).