A fully automatic paper cutting machine

Abstract

Aiming at the drawbacks of manual paper cutting in the prior art, the present invention provides a fully automatic paper cutting machine, which belongs to the technical field of paper cutting equipment, and includes an automatic feeding mechanism, a correction and positioning mechanism with a correction and positioning function and a conveying function, a cutting mechanism with a cutting function, and a controller with a feedback control function. A paper grabbing device is provided between the automatic feeding mechanism and the correction and positioning mechanism; a pressing device is provided on the correction and positioning mechanism to prevent the paper from floating up, and a conveying device is also provided on the cutting mechanism to convey the paper through the cutting mechanism for cutting. The controller is respectively connected to the automatic feeding mechanism, the correction and positioning mechanism, the paper grabbing device, the cutting mechanism, and the conveying device. The present invention can realize automatic feeding, correction and positioning, and cutting of paper, can realize the automation of paper cutting, reduce the labor intensity of workers, and significantly improve the work efficiency of paper cutting.

Description

Technical Field

[0001] The invention belongs to the technical field of paper cutting equipment, and in particular relates to a fully automatic paper cutting machine. Background Art

[0002] In the production of some paper products with printed patterns, such as photographic paper and adhesive paper, it is necessary to cut these papers. Such papers are relatively short in length. In the prior art, manual cutting devices are basically used to cut such papers. It is necessary to manually align the paper with the cutter on the manual cutting device to position the paper, and then manually drive the cutter to cut the paper, resulting in very low work efficiency. Summary of the invention

[0003] The present invention aims at the drawbacks of manual paper cutting in the prior art and provides a fully automatic paper cutting machine. The paper cutting machine can realize automatic feeding, deviation correction and positioning and automatic cutting for square paper, has a high degree of automation and can significantly improve paper cutting efficiency.

[0004] The invention objective of the present invention is achieved through the following technical scheme: a fully automatic paper cutting machine, comprising an automatic feeding mechanism, a correction and positioning mechanism with a correction and positioning function and a conveying function, a cutting mechanism with a cutting function, and a controller with a feedback control function, wherein a paper grabbing device capable of moving a single sheet of paper from the automatic feeding mechanism to the correction and positioning mechanism is provided between the automatic feeding mechanism and the correction and positioning mechanism; a pressing device for preventing the paper from floating is provided on the correction and positioning mechanism, and a conveying device for conveying the paper through the cutting mechanism for cutting is also provided on the cutting mechanism, and the controller is respectively connected to the automatic feeding mechanism, the correction and positioning mechanism, the paper grabbing device, the cutting mechanism, and the conveying device.

[0005] In the above scheme, the paper is placed into the automatic feeding mechanism, which can realize the automatic feeding of the paper, and the paper grabbing device grabs one piece of paper at a time and moves it to the deflection correction and positioning mechanism, and the deflection correction and positioning mechanism corrects the position of the paper, so that the paper moves from the fixed position to the cutting mechanism for cutting. When the paper moves on the deflection correction and positioning mechanism, the pressing device presses on the paper to prevent the paper from floating up, thereby avoiding the deflection correction and positioning process affected by the floating of the paper, and can improve the accuracy of the deflection correction and positioning of the paper. When the paper passes through the cutting mechanism, the conveying device drives the paper to provide power for the paper, thereby realizing the automatic cutting of the paper. The whole process is automatically controlled by the controller, and the controller adopts the PLC controller commonly used in industry.

[0006] As a preferred embodiment, the automatic feeding mechanism comprises a first frame, a feeding port is provided on the first frame, a material platform that can only move up and down and a lifting drive device that can drive the material platform to rise and fall and approach the feeding port are provided in the first frame, a first sensor for detecting the height of the paper above the material platform and a second sensor for detecting whether there is paper above the material platform are provided above the material platform, the lifting drive device, the first sensor and the second sensor are connected to the controller; the lifting drive device comprises a connecting seat fixedly arranged on the material platform, a vertically arranged screw rod is screwed on the connecting seat, a first motor for driving the screw rod to rotate is connected to the lower end of the screw rod, the first motor is connected to the controller, a vertically arranged first guide rail is also fixedly connected to the first frame, and a slider that can slide along the first guide rail is fixedly provided on the material platform. When in use, the paper is neatly stacked on the material platform, the first sensor can monitor the height of the paper on the material platform and transmit a signal to the controller, the controller controls the first motor to work, the first motor drives the screw rod to rotate, and then controls the material platform to rise and fall with the connecting seat until the height of the paper on the material platform is adjusted to a set height, and the specific set height can be input and set through the PLC controller. When the paper grabbing device moves the topmost paper from the automatic feeding mechanism to the deviation correction and positioning mechanism, the first sensor feedback and the controller control the first motor to keep the height of the paper on the material platform at the set height, so that the paper grabbing device can grab the paper. When the second sensor detects that there is no paper above the material platform, that is, all the paper has been used up, the second sensor feedbacks a signal to the controller, and the controller controls the automatic feeding mechanism to stop running.

[0007] Preferably, two parallel cross bars are fixedly provided on the front and rear sides of the upper end surface of the material platform, and a support plate is fixedly provided between the upper ends of the two cross bars; a paper width adjustment device located above the material platform is provided on the first frame, and the paper width adjustment device includes a first guide rod fixedly provided on the first frame and parallel to the cross bar, and two parallel width adjustment plates are provided on the first guide rod, and the width adjustment plates are perpendicular to the first guide rod, one of which is fixedly provided on the first guide rod, and the other is sleeved on the first guide rod and can slide along the first guide rod; a self-rotating screw rod is also provided on the first frame, and the screw rod is parallel to the first guide rod, and the width adjustment plate sleeved on the first guide rod is screwed to the screw rod, and when the upper end surface of the support plate moves with the material platform to be higher than the lower end of the width adjustment plate, the support plate is located between the two width adjustment plates, and the width adjustment plate is located between the two cross bars; a knob for driving the screw rod to rotate is fixedly connected to the end of the screw rod. The first sensor is fixedly provided on the first guide rod. When placing paper on the automatic feeding mechanism, one side of the paper is fitted with the width adjustment plate fixed on the first guide rod. At this time, turning the knob can drive the screw to rotate, and then drive the width adjustment plate sleeved on the first guide rod to move along the first guide rod, so that the width adjustment plate sleeved on the first guide rod can lean against the other side of the paper, thereby limiting the position of the paper, preventing the paper from moving left and right, and keeping the paper in a fixed position. At the same time, the automatic feeding mechanism can also be used for paper of different sizes. When placing paper in practice, the paper is placed on a support plate on the material platform, and the support plate is fixed on two cross bars, so that there is a space margin between the paper and the material platform. When the number of papers on the automatic feeding mechanism is small, the lower ends of the two width adjustment plates on the paper width adjustment device can extend between the two cross bars, so that the two width adjustment plates can still limit the paper and are not affected by the height of the remaining paper.

[0008] Preferably, the paper grabbing device includes a first cylinder fixedly arranged transversely on the first frame, the outer end of the piston rod of the first cylinder is vertically fixedly connected to a transversely arranged crossbeam, and the piston rod of the first cylinder is perpendicular to the first guide rod; the first frame is also provided with a guide hole, in which a second guide rod parallel to the piston rod of the first cylinder is sleeved, and the outer end of the second guide rod is fixedly connected to the crossbeam; a second cylinder arranged vertically is fixedly arranged on the crossbeam, the lower end of the piston rod of the second cylinder is fixedly connected to a cross tube of a hollow structure, a plurality of hollow tubes arranged vertically and connected to the inner cavity of the cross tube are fixedly arranged on the cross tube, a rubber suction cup of a trumpet-shaped structure with an opening downwardly arranged is fixedly connected to the lower end of the hollow tube, a hose is connected to the cross tube, and an air pump is fixedly connected to the hose, and when the piston rod of the first cylinder does not extend outward, the second cylinder is located directly above the feeding port; the first frame is also fixedly provided with a buffer for buffering the crossbeam and a third sensor for detecting the position of the crossbeam; the first cylinder, the second cylinder, the air pump, and the third sensor are respectively connected to the controller. When the second cylinder is located directly above the feeding port, the second cylinder can drive the horizontal tube to move downward until the rubber suction cup is in close contact with the topmost paper on the automatic feeding mechanism. The longitudinal movement distance of the rubber suction cup is controlled by the piston rod stroke on the second cylinder. In order to meet the use requirements, when the piston rod of the second cylinder is extended to the maximum stroke, the rubber suction cup is just in close contact with the topmost paper on the automatic feeding mechanism. And because the automatic feeding mechanism can control the height of the paper on the material platform to always remain at the set height, the effect of the above scheme can be achieved. When the rubber suction cup is in close contact with the paper, the air pump extracts the gas in the horizontal tube, so that the horizontal tube and the hollow tube generate negative pressure, so that the paper can be adsorbed on the rubber suction cup, and then the piston rod of the second cylinder retracts, and the first cylinder drives the crossbeam to move above the deviation correction table. At this time, the air pump stops working, the negative pressure in the crossbeam and the hollow tube disappears, and the paper falls on the deviation correction table under the action of gravity. Then the first cylinder drives the crossbeam back to the top of the feeding port, waiting for the next operation.

[0009] Preferably, the correction and positioning mechanism includes a correction platform, and two first grooves parallel to each other are provided on the correction platform near the automatic feeding mechanism, each of the first grooves is provided with a conveyor belt, and the conveying direction of the conveyor belt is parallel to the crossbeam, and each conveyor belt is connected to a second motor for driving the conveyor belt to run; the correction platform is also provided with a second groove perpendicular to the first groove, and the second groove is provided with a bottom plate which can only move back and forth along the length direction of the second groove, the upper end surface of the bottom plate is flush with the upper end surface of the correction platform, and a through hole is provided on the bottom plate, and a third cylinder for driving the bottom plate to move along the length direction of the second groove is fixedly provided under the correction platform, and a third guide rod is fixedly provided on the lower end surface of the correction platform, and a fixed block fixedly arranged on the lower end surface of the bottom plate is sleeved on the third guide rod. A pressure plate parallel to the bottom plate is provided above the bottom plate, and a fourth cylinder arranged vertically is fixedly provided below the deflection correction platform, and the piston rod of the fourth cylinder passes through the through hole on the bottom plate and is fixedly connected to the pressure plate; a limit block for limiting the position of paper is also provided on the bottom plate, and the limit block is perpendicular to the conveying direction of the conveyor belt; two fourth sensors for detecting the position of paper are provided above the deflection correction platform, and the two fourth sensors are respectively located on the outsides of the two conveyor belts; the second motor, the third cylinder, the fourth cylinder and the fourth sensor are respectively connected to the controller; a separation roller for preventing paper from sticking is also installed on the first frame, and the separation roller is parallel to the crossbeam, and the surface of the separation roller is provided with anti-slip grooves, and the separation roller is located between the feeding port and the deflection correction platform, and the separation roller is higher than the height of the paper on the material platform. When the rubber suction cup drives the paper to move, the back side of the paper will droop under the influence of its own gravity and pass through the separation roller. If two sheets of paper are adsorbed together, the paper not adsorbed by the rubber suction cup will fall under the friction of the separation roller, thereby achieving the separation of the paper and ensuring that the paper grabbing device only grabs one sheet of paper at a time. The actual paper to be cut is provided with a cursor used in conjunction with the fourth sensor. The fourth sensor can detect the position of the paper by detecting the position of the cursor. When the fourth sensor detects that the paper is offset, it feeds back a signal to the controller. The controller controls the shafts of the two second motors to produce a speed difference, causing a difference in the conveying speed of the two conveyor belts, thereby achieving paper deviation correction and correcting the position of the paper. The paper will stop moving after it touches the limit block. Combined with the conveying speed of the conveying device and the distance between the conveying device and the limit block, the time difference can be preset in the PLC controller to wait until the paper touches the limit block. At this time, the paper moves to between the bottom plate and the clamping plate, and the controller controls the fourth cylinder to drive the clamping plate to press on the paper. At this time, the bottom plate and the clamping plate clamp the paper, and the controller controls the third cylinder to drive the bottom plate to move toward the cutting mechanism, thereby controlling the paper to move toward the cutting mechanism.

[0010] Preferably, the clamping device includes at least two mounting brackets located above the deflection correcting platform, with a gap left between the mounting bracket and the deflection correcting platform, the mounting bracket being provided with mounting holes which pass through the upper and lower ends of the mounting bracket, the mounting holes being located directly above the conveyor belt, two longitudinally arranged steel balls being provided in the mounting holes, the diameter of the steel balls being equal to the diameter of the mounting holes and the diameter of the steel balls being greater than the height of the gap; a base is fixedly provided between the mounting bracket and the deflection correcting platform; a mounting rod parallel to the cross beam is fixedly connected to the mounting bracket, a first elastic pressing plate which can be pressed on the deflection correcting platform is fixedly provided on the mounting rod, a connecting beam is fixedly connected to the mounting bracket, a second elastic pressing plate which can be pressed on the deflection correcting platform is fixedly connected to the connecting beam, the direction of the first elastic pressing plate is opposite to the conveying direction of the conveyor belt, the front end of the first elastic pressing plate is inclined upward, and the second elastic pressing plate is arranged along the conveying direction of the conveyor belt. The movement of paper on the deviation correction platform is powered by the conveyor belt. In this process, affected by air resistance and the like, the paper may float up, thereby affecting the deviation correction and positioning effect of the deviation correction and positioning mechanism on the paper. To address this problem, the paper must be prevented from floating up and must not affect the movement of the paper conveyed by the conveyor belt. In the present invention, by setting a steel ball, a better pressing effect can be achieved on the paper to prevent the paper from floating up, and the steel ball can roll in the mounting hole as the paper moves, which has little effect on the movement of the paper driven by the conveyor belt, and its effect can be ignored. At the same time, by setting multiple first elastic pressing plates and second elastic pressing plates, a better pressing effect can also be achieved on the paper. The first elastic pressing plate and the second elastic pressing plate both use elastic steel plates with a thickness of less than 0.02 mm, which can achieve a better pressing effect on the paper, prevent the paper from floating up, and will not affect the movement of the paper driven by the conveyor belt. Because the first elastic pressing plate is set in the opposite direction to the conveying direction of the conveyor belt, the front end of the first elastic pressing plate is designed to be tilted upward, so that the first elastic pressing plate will not affect the movement of the paper.

[0011] Preferably, a sensor position adjustment device for adjusting the position of the fourth sensor is provided between each of the fourth sensors and the mounting bracket, the sensor position adjustment device comprises a second guide rail parallel to the conveying direction of the conveyor belt, the second guide rail is provided with a first adjustment plate that can slide along the second guide rail, the mounting bracket is also fixedly provided with an adjustment seat, the adjustment seat is fixedly connected with a screw micrometer that can drive the first adjustment plate away from the adjustment seat, a first reset spring that can drive the first adjustment plate to reset is provided between the adjustment seat and the first adjustment plate; a third guide rail perpendicular to the second guide rail is fixedly connected to the first adjustment plate, the third guide rail is provided with a second adjustment plate that can slide along the third guide rail, and the second adjustment plate and the third guide rail are connected to each other. A locking bolt capable of locking and fixing the second adjustment plate on the third guide rail is arranged between the two guide rails. The fourth sensor is fixedly arranged at the end of the second adjustment plate and arranged toward the deviation correction platform. The bottom plate is also provided with a strip through groove parallel to the conveying direction of the conveyor belt. A fixed plate is fixedly arranged on the bottom plate. The fixed plate is arranged on the side of the limit block facing away from the conveying device. An adjusting bolt parallel to the conveying direction of the conveyor belt is screwed on the fixed plate. The end of the adjusting bolt is tightly attached to the limit block. A fourth guide rod parallel to the conveying direction of the conveyor belt is fixedly connected to the bottom plate. The limit block is sleeved on the fourth guide rod and can slide along the fourth guide rod. A second reset spring capable of driving the limit block to move toward the fixed plate is arranged between the limit block and the bottom plate. The cursor positions on papers of different sizes are different. The position of the fourth sensor can be adjusted to correspond to the cursor position on the paper through the sensor position adjustment device, so that the deviation correction positioning mechanism can be applied to papers of different sizes and specifications in different batches. The position of the limit block can also be adjusted by the set adjusting bolt and the second reset spring, so that the limit block can also be applied to papers of different sizes and specifications.

[0012] Preferably, the cutting mechanism comprises a second frame, the second frame is fixedly connected to the cutting platform, the cutting platform is provided with a first cross plate above the cutting platform and parallel to the upper end surface of the cutting platform, the lower end of the first cross plate is fixedly connected with two mutually parallel mounting limit strips, a mounting plate is provided under the first cross plate, the upper end surface of the mounting plate is provided with two mounting through grooves corresponding to the mounting limit strips, the mounting limit strips can only be embedded in the corresponding mounting through grooves from the ends of the mounting through grooves, the first cross plate is also fixedly connected with two positioning baffles corresponding to the mounting through grooves, when the mounting plate is mounted on the mounting limit strip, the positioning baffle closes one end of the mounting through groove and the mounting plate is fitted with the positioning baffle, the lower end of the mounting plate is fixedly connected with a tool plate by screws, the lower end surface of the tool plate is fixedly connected with a cutting tool matching the cutting platform, the lower end surface of the tool plate is also fixedly connected with a buffer sponge, and the thickness of the buffer sponge when it is not deformed is greater than the cutting The height of the tool; the second frame is provided with multiple guide columns that can only move along the length direction, all guide columns are arranged vertically, the upper end of the guide columns is fixedly connected to the first cross plate, and a second cross plate parallel to the first cross plate is provided below the cutting platform, and the lower end of the guide column is fixedly connected to the second cross plate, and a cam that can drive the second cross plate to move downward is also provided in the second frame, and a third cross plate parallel to the second cross plate is also fixed on the second frame, and the third cross plate is located directly below the second cross plate, and a third motor for driving the cam to rotate is fixedly connected to the third cross plate; the lower end surface of the second cross plate is also fixedly connected to a vertically arranged limit rod, and a limit plate that cooperates with the lower end surface of the third cross plate is fixedly connected to the limit rod, and a third return spring that can drive the second cross plate to move upward is also provided between the third cross plate and the second cross plate, and the third return spring is coiled on the limit rod, and the third motor is connected to the controller. The third motor drives the cam to rotate, and the cam can drive the second horizontal plate to move downward, and then control the first horizontal plate to move downward through the guide column, and finally control the cutting tool to cooperate with the cutting platform to achieve the paper cutting operation. When the cam is close to the second horizontal plate on the side closer to the third motor shaft, the third reset spring drives the second horizontal plate to move upward, and then controls the first horizontal plate and the cutting tool to move upward until the limit plate on the limit rod fits the lower end surface of the third horizontal plate and the first horizontal plate no longer moves upward, and then a cut is completed. The installation plate can be quickly installed by installing the limit bar embedded in the installation groove. When the installation plate fits the positioning baffle, it proves that the installation plate is installed in place. At this time, the positioning baffle plays a role in positioning and installing the installation plate, and the tool plate with the cutting tool is pre-installed on the installation plate by screws. The tool plate and the installation plate are respectively provided with corresponding screw holes. The tool plate can be installed on the installation plate by installing screws in the screw holes, without additional positioning, so that the cutting tool can be quickly installed. The buffer sponge provided can play a buffering role and play a certain protective role on the tool.

[0013] Preferably, the conveying device is in two sets, and the two sets of conveying devices are respectively arranged on the front and rear sides of the cutting platform. The conveying device includes an active roller that is arranged on the second frame and can rotate. The second frame is fixedly provided with a fourth motor that drives the active roller to rotate. A driven roller that cooperates with the active roller is provided above the active roller. The second frame is also fixedly provided with a fifth cylinder for driving the driven roller to rise and fall. The piston rod of the fifth cylinder is provided with a bearing, and the end of the driven roller is sleeved on the bearing; the second frame is also fixedly provided with a fifth sensor and a sixth sensor for detecting the position of the paper, and the fifth sensor and the sixth sensor are both located in front of the conveying device on the front side of the cutting platform; the fourth motor, the fifth cylinder, the fifth sensor, and the sixth sensor are respectively connected to the controller. The fifth sensor and the sixth sensor are both located in front of the conveying device on the front side of the cutting platform, that is to say, when the paper passes through the conveying device on the front side of the cutting platform, it will inevitably be detected by the fifth sensor and the sixth sensor. When the fifth sensor detects the paper, a feedback signal is given to the controller, and the controller controls the fifth cylinder on the conveying device on the front side of the cutting platform to drive the driven roller to move down until the driven roller cooperates with the active roller. At the same time, the controller controls the fourth motor to drive the active roller to rotate. The active roller and the driven roller can clamp the paper and convey the paper through the conveying device on the front side of the cutting platform. When the paper completely passes through the fifth sensor, the fifth sensor When the paper cannot be detected, the controller receives the signal fed back by the fifth sensor. The controller controls the fifth cylinder on the conveying device on the rear side of the cutting platform to drive the driven roller to move down until the driven roller cooperates with the active roller, and controls the fourth motor to drive the active roller to rotate. At the same time, the fifth cylinder on the conveying device on the front side of the cutting platform drives the driven roller to move up and controls the fourth motor on the conveying device to stop working. At this time, the paper is clamped and conveyed by the conveying device on the rear side of the cutting platform, so that the conveying device can always provide power for the paper when the paper passes through the cutting mechanism, and the cutting mechanism can cut the paper. A cursor used in conjunction with the sixth sensor is set next to each row of paper that needs to be cut. When the paper passes through the sixth sensor, the sixth sensor detects the above cursor position and then feeds back a signal to the controller. The controller controls the cutting mechanism to cut the paper, thereby achieving the role of cutting positioning.

[0014] Preferably, a receiving platform is fixedly provided at the rear end of the second frame of the cutting mechanism. The receiving platform is gradually tilted downward from the front to the back, and the front end of the receiving platform is lower than the active roller of the conveying device located at the rear side of the cutting platform. Two limit stops for limiting the position of the paper are fixedly connected to the receiving platform. The paper cut by the cutting mechanism will fall on the receiving platform, which is convenient for workers to uniformly handle the cut paper. The limit stops can limit the paper laterally to prevent the paper from falling outside the receiving platform, which is convenient for workers to sort out the paper on the receiving platform.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention can realize automatic feeding, deviation correction positioning and cutting of paper, can realize automation of paper cutting, reduce the labor intensity of workers, and significantly improve the work efficiency of paper cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a stereogram of the present invention;

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 A top view of the present invention;

[0019] Figure 4 It is a bottom view of the present invention;

[0020] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0021] Figure 6 It is a schematic diagram of the structure of the automatic feeding mechanism and the paper grabbing device;

[0022] Figure 7 It is a structural schematic diagram of the lifting drive device;

[0023] Figure 8 It is a schematic diagram of the structure of the clamping device;

[0024] Fig. 9 It is a schematic diagram of the cutting mechanism, conveying device, and material receiving platform structure;

[0025] Fig.10 It is a schematic diagram of the cutting mechanism, conveying device, and material receiving platform structure;

[0026] Fig.11 A bottom view of the mounting plate with the tool plate installed;

[0027] Markings in the figure: 1. Automatic feeding mechanism, 2. Correction and positioning mechanism, 3. Cutting mechanism, 4. Controller, 5. Paper grabbing device, 6. Pressing device, 7. Conveying device, 8. First frame, 9. Feeding port, 10. Material platform, 11. Lifting drive device, 12. First sensor, 13. Second sensor, 14. Connecting seat, 15. Screw, 16. First motor, 17. First guide rail, 18. Slider, 19. Crossbar, 20. Support plate, 21. Paper width adjustment device, 22. First guide rod, 23. Width adjustment plate, 24. Screw, 25. Knob, 2 6. First cylinder, 27. Crossbeam, 28. Guide hole, 29. Second guide rod, 30. Second cylinder, 31. Cross tube, 32. Hollow tube, 33. Rubber suction cup, 34. Air pump, 35. Hose, 36. Buffer, 37. Third sensor, 38. Correction table, 39. First groove, 40. Conveyor belt, 41. Second motor, 42. Second groove, 43. Bottom plate, 45. Third cylinder, 46. Third guide rod, 47. Fixed block, 48. Pressing plate, 49. Fourth cylinder, 50. Limit block, 51. Fourth sensor, 52. Separation roller, 53. Mounting frame , 54, mounting hole, 55, steel ball, 56, base, 57, mounting rod, 58, first elastic pressing piece, 59, connecting beam, 60, second elastic pressing piece, 61, sensor position adjustment device, 62, second guide rail, 63, first adjustment plate, 64, adjustment seat, 65, screw micrometer, 66, first return spring, 67, third guide rail, 68, second adjustment plate, 69, locking bolt, 70, strip groove, 71, fixing plate, 72, adjusting bolt, 73, fourth guide rod, 74, second return spring, 75, second frame, 76, cutting platform, 77, first horizontal Plate, 78, installation limit strip, 79, installation plate, 80, installation slot, 81, positioning baffle, 82, screw, 83, tool plate, 84, cutting tool, 85, buffer sponge, 86, guide column, 87, second horizontal plate, 88, cam, 89, third horizontal plate, 90, third motor, 91, limit rod, 92, limit plate, 93, third return spring, 94, active roller, 95, fourth motor, 96, driven roller, 97, fifth cylinder, 98, bearing, 99, fifth sensor, 100, sixth sensor, 101, material receiving platform, 102, limit stopper. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0029] Example 1

[0030] like Figure 1 , Figure 3 , Figure 4As shown, a fully automatic paper cutting machine includes an automatic feeding mechanism 1, a deflection correction and positioning mechanism 2 with a deflection correction and positioning function and a conveying function, a cutting mechanism 3 with a cutting function, and a controller 4 with a feedback control function. A paper grabbing device 5 capable of moving a single paper from the automatic feeding mechanism 1 to the deflection correction and positioning mechanism 2 is provided between the automatic feeding mechanism 1 and the deflection correction and positioning mechanism 2; a pressing device 6 for preventing the paper from floating is provided on the deflection correction and positioning mechanism 2, and a conveying device 7 for conveying the paper through the cutting mechanism 3 for cutting is also provided on the cutting mechanism 3. The controller 4 is respectively connected to the automatic feeding mechanism 1, the deflection correction and positioning mechanism 2, the paper grabbing device 5, the cutting mechanism 3, and the conveying device 7.

[0031] like Figure 1 , Figure 3 , Figure 6 , Figure 7As shown, the automatic feeding mechanism 1 includes a first frame 8, a feeding port 9 is provided on the first frame 8, a material platform 10 that can only move up and down and a lifting drive device 11 that can drive the material platform 10 to rise and fall and approach the feeding port 9 are provided in the first frame 8, a first sensor 12 for detecting the height of the paper above the material platform 10 and a second sensor 13 for detecting whether there is paper above the material platform 10 are provided above the material platform 10, the lifting drive device 11, the first sensor 12, and the second sensor 13 are connected to the controller 4; the lifting drive device 11 includes a connecting seat 14 fixedly arranged on the material platform 10, a vertically arranged screw rod 15 is screwed on the connecting seat 14, a first motor 16 for driving the screw rod 15 to rotate is connected to the lower end of the screw rod 15, and the first motor 16 is connected to the controller 4, a vertically arranged first guide rail 17 is also fixedly connected to the first frame 8, and a slider 18 that can slide along the first guide rail 17 is fixedly provided on the material platform 10. Two mutually parallel cross bars 19 are fixedly provided on the front and rear sides of the upper end surface of the material platform 10, a support plate 20 is fixedly provided between the upper ends of the two cross bars 19, and the second sensor 13 is fixedly provided on the support plate 20; the first frame 8 is provided with a paper width adjustment device 21 located above the material platform 10, the paper width adjustment device 21 includes a first guide rod 22 fixedly provided on the first frame 8 and parallel to the cross bar 19, the first guide rod 22 is provided with two mutually parallel width adjustment plates 23, the width adjustment plates 23 are perpendicular to the first guide rod 22, and one of the width adjustment plates 23 is fixedly provided on the first guide rod 22, another width adjustment plate 23 is sleeved on the first guide rod 22 and can slide along the first guide rod 22; the first frame 8 is also provided with a self-rotating screw 24, the screw 24 is parallel to the first guide rod 22, the width adjustment plate 23 sleeved on the first guide rod 22 is screwed to the screw 24, when the upper end surface of the support plate 20 moves with the material platform 10 to be higher than the lower end of the width adjustment plate 23, the support plate 20 is located between the two width adjustment plates 23, and the width adjustment plate 23 is located between the two cross bars 19; the end of the screw 24 is fixedly connected to a knob 25 for driving the screw 24 to rotate. The first sensor 12 is fixedly set on the first guide rod 22.

[0032] like Figure 1 , Figure 3 , Figure 6As shown, the paper grabbing device 5 includes a first cylinder 26 fixedly arranged transversely on the first frame 8, the outer end of the piston rod of the first cylinder 26 is vertically fixedly connected to a transversely arranged crossbeam 27, and the piston rod of the first cylinder 26 is perpendicular to the first guide rod 22; the first frame 8 is also provided with a guide hole 28, in which a second guide rod 29 parallel to the piston rod of the first cylinder 26 is sleeved, and the outer end of the second guide rod 29 is fixedly connected to the crossbeam 27; a second cylinder 30 arranged vertically is fixedly arranged on the crossbeam 27, and the lower end of the piston rod of the second cylinder 30 is fixedly connected to a cross tube 31 with a hollow structure, and a plurality of hollow tubes 32 arranged vertically and connected to the inner cavity of the cross tube 31 are fixedly arranged on the cross tube 31, and a rubber suction cup 33 with a trumpet-shaped structure with an opening downward is fixedly connected to the lower end of the hollow tube 32, and a hose 35 is connected to the cross tube 31, and an air pump 34 is fixedly connected to the hose. When the piston rod of the first cylinder 26 does not extend outward, the second cylinder 30 is located directly above the loading port 9; the first frame 8 is also fixed with a buffer 36 for buffering the crossbeam 27 and a third sensor 37 for detecting the position of the crossbeam 27; the first cylinder 26, the second cylinder 30, the air pump 34, and the third sensor 37 are respectively connected to the controller 4.

[0033] like Figure 1-5As shown, the deflection correction and positioning mechanism 2 includes a deflection correction platform 38, and two mutually parallel first grooves 39 are provided on the deflection correction platform 38 near the automatic feeding mechanism 1, and a conveyor belt 40 is provided in each of the first grooves 39, and the conveying direction of the conveyor belt 40 is parallel to the crossbeam 27, and each conveyor belt 40 is connected to a second motor 41 for driving the conveyor belt 40 to run, and the second motor 41 is fixedly arranged below the deflection correction platform 38, and the second motor 41 is a servo motor; the deflection correction platform 38 is also provided with a second motor 41 for driving the conveyor belt 40 to run. A second groove 42 is provided which is perpendicular to the first groove 39. A bottom plate 43 which can only move back and forth along the length direction of the second groove 42 is provided in the second groove 42. The upper end surface of the bottom plate 43 is flush with the upper end surface of the deflection correction platform 38. A through hole is provided on the bottom plate 43. A third cylinder 45 which drives the bottom plate 43 to move along the length direction of the second groove 42 is fixedly provided below the deflection correction platform 38. A third guide rod 46 is fixedly provided on the lower end surface of the deflection correction platform 38. A fixing block which is fixedly provided on the lower end surface of the bottom plate 43 is sleeved on the third guide rod 46. 47, a pressing plate 48 parallel to the bottom plate 43 is provided above the bottom plate 43, a fourth cylinder 49 vertically arranged is fixedly provided below the deflection correction platform 38, a piston rod of the fourth cylinder 49 passes through a through hole on the bottom plate 43 and is fixedly connected to the pressing plate 48; a limit block 50 for limiting the position of the paper is also provided on the bottom plate 43, the limit block 50 is perpendicular to the conveying direction of the conveyor belt 40, two fourth sensors 51 for detecting the position of the paper are provided above the deflection correction platform 38, and the two fourth sensors 51 are respectively located at The second motor 41, the third cylinder 45, the fourth cylinder 49, and the fourth sensor 51 are connected to the controller 4 respectively, and the controller 4 is fixedly arranged on the deflection correction platform 38; the first frame 8 is also equipped with a separation roller 52 to prevent paper from sticking, the separation roller 52 is parallel to the crossbeam 27, and the surface of the separation roller 52 is provided with anti-skid patterns, the separation roller 52 is located between the feeding port 9 and the deflection correction platform 38, and the separation roller 52 is higher than the height of the paper on the material platform 10. The air pump 34 is fixedly arranged on the deflection correction platform 38.

[0034] like Figure 8As shown, the pressing device 6 includes two mounting frames 53 located above the deflection correction platform 38, and a gap is left between the mounting frames 53 and the deflection correction platform 38, and the gap is used for the movement of paper. The mounting frames 53 are provided with mounting holes 54 that pass through the upper and lower ends of the mounting frames 53, and the mounting holes 54 are located directly above the conveyor belt 40. Two longitudinally arranged steel balls 55 are provided in the mounting holes 54, and the diameter of the steel balls 55 is equal to the diameter of the mounting holes 54 and the diameter of the steel balls 55 is greater than the height of the gap; a fixed device 53 is provided between the mounting frame 53 and the deflection correction platform 38. There is a base 56; the mounting frame 53 is fixedly connected to a mounting rod 57 parallel to the cross beam 27, the mounting rod 57 is fixedly provided with a first elastic pressing piece 58 that can be pressed on the deflection correction platform 38, the mounting frame 53 is fixedly connected to a connecting beam 59, the connecting beam 59 is fixedly connected to a second elastic pressing piece 60 that can be pressed on the deflection correction platform 38, the direction of the first elastic pressing piece 58 is opposite to the conveying direction of the conveyor belt 40, the front end of the first elastic pressing piece 58 is inclined upward, and the second elastic pressing piece 60 is arranged along the conveying direction of the conveyor belt 40. A sensor position adjustment device 61 for adjusting the position of the fourth sensor 51 is provided between each of the fourth sensors 51 and the mounting frame 53, and the sensor position adjustment device 61 includes a second guide rail 62 parallel to the conveying direction of the conveyor belt 40, and the second guide rail 62 is provided with a first adjustment plate 63 that can slide along the second guide rail 62, and the mounting frame 53 is also fixedly provided with an adjustment seat 64, and the adjustment seat 64 is fixedly connected with a screw micrometer 65 that can drive the first adjustment plate 63 away from the adjustment seat 64, and a first return spring 66 that can drive the first adjustment plate 63 to return is provided between the adjustment seat 64 and the first adjustment plate 63; a third guide rail 67 perpendicular to the second guide rail 62 is fixedly connected to the first adjustment plate 63, and the third guide rail 67 is provided with a second adjustment plate 68 that can slide along the third guide rail 67, and a spring 66 that can drive the first adjustment plate 63 to return is provided between the second adjustment plate 68 and the third guide rail 67. The second adjustment plate 68 is locked and fixed to the locking bolt 69 on the third guide rail 67, and the fourth sensor 51 is fixedly arranged at the end of the second adjustment plate 68 and arranged toward the correction platform 38; the bottom plate 43 is also provided with a strip through groove 70 parallel to the conveying direction of the conveyor belt 40, and a fixing plate 71 is fixedly arranged on the bottom plate 43, and the fixing plate 71 is arranged on the side of the limit block 50 facing away from the conveying device 7, and an adjusting bolt 72 parallel to the conveying direction of the conveyor belt 40 is screwed on the fixing plate 71, and the end of the adjusting bolt 72 is tightly attached to the limit block 50, and a fourth guide rod 73 parallel to the conveying direction of the conveyor belt 40 is fixedly connected to the bottom plate 43, and the limit block 50 is sleeved on the fourth guide rod 73 and can slide along the fourth guide rod 73, and a second reset spring 74 that can drive the limit block 50 to move toward the fixed plate 71 is provided between the limit block 50 and the bottom plate 43.

[0035] like Figure 1 , Figure 3 , Figure 4 , Figure 9-11 As shown, the cutting mechanism 3 includes a second frame 75, to which a cutting platform 76 is fixedly connected, a first transverse plate 77 parallel to the upper end surface of the cutting platform 76 is provided above the cutting platform 76, two mutually parallel mounting limit strips 78 are fixedly connected to the lower end of the first transverse plate 77, a mounting plate 79 is provided below the first transverse plate 77, and two mounting through grooves 80 corresponding to the mounting limit strips 78 are provided on the upper end surface of the mounting plate 79, and the mounting limit strips 78 can only be embedded in the corresponding mounting through grooves 80 from the ends of the mounting through grooves 80, and the first transverse plate 7 Two positioning baffles 81 corresponding to the mounting slots 80 are also fixedly connected to the mounting plate 79. When the mounting plate 79 is installed on the mounting limit strip 78, the positioning baffle 81 closes one end of the mounting slot 80 and the mounting plate 79 fits the positioning baffle 81. The lower end of the mounting plate 79 is fixedly connected to a tool plate 83 by screws 82. The lower end surface of the tool plate 83 is fixedly connected to a cutting tool 84 that cooperates with the cutting platform 76. The lower end surface of the tool plate 83 is also fixedly connected to a buffer sponge 85. The thickness of the buffer sponge 85 when it is not deformed is greater than that of the cutting tool. The height of the tool 84; the second frame 75 is provided with four guide columns 86 that can only move along the length direction, all of the guide columns 86 are vertically arranged, the upper ends of the guide columns 86 are fixedly connected to the first cross plate 77, a second cross plate 87 parallel to the first cross plate 77 is provided below the cutting platform 76, the lower ends of the guide columns 86 are fixedly connected to the second cross plate 87, the second frame 75 is also provided with a cam 88 that can drive the second cross plate 87 to move downward, the second frame 75 is also fixedly provided with a third cross plate 89 parallel to the second cross plate 87, the third The transverse plate 89 is located directly below the second transverse plate 87, and a third motor 90 for driving the cam 88 to rotate is fixedly connected to the third transverse plate 89; a vertically arranged limit rod 91 is also fixedly connected to the lower end surface of the second transverse plate 87, and a limit plate 92 cooperating with the lower end surface of the third transverse plate 89 is fixedly connected to the limit rod 91; a third return spring 93 capable of driving the second transverse plate 87 to move upward is also provided between the third transverse plate 89 and the second transverse plate 87, and the third return spring 93 is coiled on the limit rod 91, and the third motor 90 is connected to the controller 4.

[0036] like Figure 1 , Figure 3 , Figure 4 , Fig. 9 , Fig.10As shown, the conveying device 7 is composed of two sets, and the two sets of conveying devices 7 are respectively arranged on the front and rear sides of the cutting platform 76. The conveying device 7 includes an active roller 94 that can rotate on the second frame 75. The second frame 75 is fixedly provided with a fourth motor 95 that drives the active roller 94 to rotate. The fourth motor 95 is a servo motor. A driven roller 96 that cooperates with the active roller 94 is arranged above the active roller 94. The second frame 75 is also fixedly provided with a fifth cylinder 97 for driving the driven roller 96 to rise and fall. A bearing 98 is arranged on the piston rod of the fifth cylinder 97, and the end of the driven roller 96 is sleeved on the bearing 98; the second frame 75 is also fixedly provided with a fifth sensor 99 and a sixth sensor 100 for detecting the position of the paper, and the fifth sensor 99 and the sixth sensor 100 are both located on the front side of the conveying device 7 on the front side of the cutting platform 76; the fourth motor 95, the fifth cylinder 97, the fifth sensor 99, and the sixth sensor 100 are respectively connected to the controller 4.

[0037] like Figure 1 , Figure 3 , Figure 4 , Fig. 9 , Fig.10 As shown, a material receiving platform 101 is fixedly provided at the rear end of the second frame 75 of the cutting mechanism 3. The material receiving platform 101 is gradually tilted downward from front to back. The front end of the material receiving platform 101 is lower than the active roller 94 of the conveying device 7 located at the rear side of the cutting platform 76. Two limit stops 102 for limiting the position of paper are fixedly connected to the material receiving platform 101.

[0038] In the present invention, the first sensor 12, the second sensor 13, the third sensor 37, the fourth sensor 51, the fifth sensor 99, and the sixth sensor 100 are all infrared sensors, and their respective detection functions are realized by the working principle of the infrared sensor.

[0039] The present invention is mainly used for cutting and trimming square paper. In actual use, the paper is neatly stacked on the support plate 20 of the automatic feeding mechanism 1, and one side of the paper is attached to the width adjustment plate 23 fixed on the first guide rod 22. By turning the knob 25 on the paper width adjustment device 21, the other width adjustment plate 23 is driven to attach to the other side of the paper, so as to achieve limited adjustment of the paper width, prevent the paper from being loaded on the automatic feeding mechanism 1 from lateral deviation, keep the paper in a fixed position, and also enable the automatic feeding mechanism 1 to be suitable for papers of different sizes. The first sensor 12 on the automatic feeding mechanism 1 can monitor the height of the paper on the material platform 10 and transmit a signal to the controller 4. The controller 4 controls the first motor 16 to work, and the first motor 16 drives the screw 15 to rotate, thereby controlling the material platform 10 to rise and fall with the connecting seat 14 until the height of the paper on the material platform 10 is adjusted to a set height. The specific set height can be input and set through the controller 4. The controller 4 adopts a PLC controller, which is a programmable logic controller (Programmable Logic Controller), a digital electronic device with a microprocessor, a digital logic controller used for automatic control, and can load control instructions into the memory for storage and execution at any time. The programmable controller is modularly composed of an internal CPU, instruction and data memory, input and output units, power modules, digital simulation and other units.

[0040] When the paper grabbing device 5 is working, the second cylinder 30 drives the cross tube 31 to move downward until the rubber suction cup 33 is in close contact with the uppermost paper on the automatic feeding mechanism 1. The longitudinal movement distance of the rubber suction cup 33 is controlled by the stroke of the piston rod on the second cylinder 30. In order to meet the use requirements, when the piston rod of the second cylinder 30 is extended to the maximum stroke, the rubber suction cup 33 is just in close contact with the uppermost paper on the automatic feeding mechanism 1. Because the automatic feeding mechanism 1 can control the height of the paper on the material platform 10 to always remain at the set height, the effect of the above scheme can be achieved. When the rubber suction cup 33 is pressed against the paper, the air pump 34 extracts the gas in the transverse tube 31, so that negative pressure is generated in the transverse tube 31 and the hollow tube 32, so that the paper can be adsorbed on the rubber suction cup 33, and then the piston rod of the second cylinder 30 retracts, and the controller 4 controls the first cylinder 26 to drive the cross beam 27 to move above the deflection correction platform 38. At this time, the air pump 34 stops working, and the negative pressure in the transverse tube 31 and the hollow tube 32 disappears. The paper falls on the deflection correction platform 38 under the action of gravity, and then the first cylinder 26 drives the cross beam 27 back to the top of the feeding port 9, waiting for the next operation. When the paper grabbing device 5 adsorbs the paper through the separation roller 52 located between the feeding port 9 and the deflection correction platform 38, if two sheets of paper are adsorbed together, the paper not adsorbed by the rubber suction cup 33 will fall under the friction of the separation roller 52, thereby realizing the separation of the paper, ensuring that the paper grabbing device 5 only grabs one sheet of paper at a time.

[0041] The actual paper to be cut is provided with a cursor used in conjunction with the fourth sensor 51. When the paper falls onto the deflection correction platform 38 of the deflection correction positioning mechanism 2, the fourth sensor 51 can detect the position of the paper by detecting the position of the cursor. When the fourth sensor 51 detects that the paper is offset, a feedback signal is given to the controller 4. The controller 4 controls the rotating shafts of the two second motors 41 to produce a speed difference, so that there is a difference in the conveying speeds of the two conveyor belts 40, thereby realizing the deflection correction of the paper and correcting the position of the paper. After the paper touches the limit block 50, it will stop moving. Combined with the conveying speed of the conveyor belt 40 and the distance between the conveyor belt 40 and the limit block 50, by presetting the time difference in the PLC controller 4, etc., it can wait until the paper touches the limit block 50. At this time, the paper moves between the bottom plate 43 and the clamping plate 48. The controller 4 controls the fourth cylinder 49 to drive the clamping plate 48 to press on the paper. At this time, the bottom plate 43 and the clamping plate 48 clamp the paper. The controller 4 controls the third cylinder 45 to drive the bottom plate 43 to move toward the cutting mechanism 3, and then controls the paper to move toward the cutting mechanism 3. In order to prevent the paper from floating when moving on the deviation correction platform, the present invention can achieve a better compression effect on the paper by setting the steel ball 55 to prevent the paper from floating, and the steel ball 55 can roll in the mounting hole 54 as the paper moves, which has little effect on the movement of the paper driven by the conveyor belt 40, and its effect can be ignored. At the same time, by setting multiple first elastic pressing plates 58 and second elastic pressing plates 60, a better pressing effect can be achieved on the paper. The first elastic pressing plate 58 and the second elastic pressing plate 60 are both made of elastic steel sheets with a thickness of less than 0.02 mm, which can achieve a better pressing effect on the paper, prevent the paper from floating and will not affect the movement of the paper driven by the conveyor belt 40. Because the first elastic pressing plate 58 is set in the opposite direction to the conveying direction of the conveyor belt 40, the front end of the first elastic pressing plate 58 is designed to be tilted upward, so that the first elastic pressing plate 58 will not affect the movement of the paper. The cursor position on papers of different sizes is different. The position of the fourth sensor 51 can be adjusted to correspond to the cursor position on the paper through the sensor position adjustment device 61, so that the deviation correction positioning mechanism 2 can be applied to different batches of papers of different sizes. The position of the limit block 50 can also be adjusted by the adjustment bolt 72 and the second reset spring 74, so that the limit block 50 can also be applied to papers of different sizes.

[0042] When the paper enters the cutting mechanism 3, the fifth sensor 99 and the sixth sensor 100 are both located in front of the conveying device 7 on the front side of the cutting platform 76, that is, when the paper passes through the conveying device 7 on the front side of the cutting platform 76, it will be detected by the fifth sensor 99 and the sixth sensor 100. When the fifth sensor 99 detects the paper, it feeds back a signal to the controller 4. The controller 4 controls the fifth cylinder 97 on the conveying device 7 on the front side of the cutting platform 76 to drive the driven roller 96 to move down until the driven roller 96 cooperates with the active roller 94. At the same time, the controller 4 controls the fourth motor 95 to drive the active roller 94 to rotate. The active roller 94 and the driven roller 96 can clamp the paper and convey the paper through the conveying device 7 on the front side of the cutting platform 76. When the paper completely passes through the fifth sensor After the fifth sensor 99 is detected, the fifth sensor 99 cannot detect the paper. At this time, the controller 4 receives the signal fed back by the fifth sensor 99. The controller 4 controls the fifth cylinder 97 on the conveying device 7 on the rear side of the cutting platform 76 to drive the driven roller 96 to move down until the driven roller 96 cooperates with the active roller 94, and controls the fourth motor 95 to drive the active roller 94 to rotate. At the same time, the fifth cylinder 97 on the conveying device 7 on the front side of the cutting platform 76 drives the driven roller 96 to move up and controls the fourth motor 95 on the conveying device 7 to stop working. At this time, the paper is clamped and conveyed by the conveying device 7 on the rear side of the cutting platform 76. In this way, it can be ensured that the conveying device 7 always provides power for the paper when the paper passes through the cutting mechanism 3, and the cutting mechanism 3 can cut the paper. A cursor used in conjunction with the sixth sensor 100 is set next to each row of the paper to be cut. When the paper passes through the sixth sensor 100, the sixth sensor 100 detects the above cursor position, and then feeds back a signal to the controller 4. The controller 4 controls the cutting mechanism 3 to cut the paper, thereby realizing the role of cutting positioning. When the cutting mechanism 3 cuts the paper, the fourth motor 95 on the conveying device 7 that provides power for the paper stops working, so that the paper temporarily stops moving, thereby ensuring the accuracy of the cutting mechanism 3 when cutting the paper and avoiding the movement of the paper during the cutting process to affect the cutting position.

[0043] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A fully automatic paper cutting machine, characterized in that: It includes an automatic feeding mechanism, a deviation correction and positioning mechanism with deviation correction and positioning functions and a conveying function, a cutting mechanism with a cutting function, and a controller with a feedback control function. A paper grabbing device capable of moving a single paper from the automatic feeding mechanism to the deviation correction and positioning mechanism is provided between the automatic feeding mechanism and the deviation correction and positioning mechanism; a pressing device for preventing the paper from floating is provided on the deviation correction and positioning mechanism, and a conveying device for conveying the paper through the cutting mechanism for cutting is also provided on the cutting mechanism. The controller is respectively connected to the automatic feeding mechanism, the deviation correction and positioning mechanism, the paper grabbing device, the cutting mechanism, and the conveying device; The cutting mechanism comprises a second frame, the second frame is fixedly connected to the cutting platform, the cutting platform is provided with a first cross plate above the cutting platform and parallel to the upper end surface of the cutting platform, the lower end of the first cross plate is fixedly connected with two mutually parallel mounting limit strips, a mounting plate is provided under the first cross plate, the upper end surface of the mounting plate is provided with two mounting through grooves corresponding to the mounting limit strips, and the mounting limit strips can only be embedded in the corresponding mounting through grooves from the ends of the mounting through grooves, and the first cross plate is also fixedly connected with two positioning baffles corresponding to the mounting through grooves. When the mounting plate is installed on the mounting limit strip, the positioning baffle closes one end of the mounting through groove and the mounting plate is fitted with the positioning baffle, the lower end of the mounting plate is fixedly connected with a tool plate by screws, and the lower end surface of the tool plate is fixedly connected with a cutting tool that cooperates with the cutting platform, and the lower end surface of the tool plate is also fixedly connected with a buffer sponge, and the thickness of the buffer sponge when it is not deformed is greater than the cutting tool. The cam is further provided in the second frame and is capable of driving the second cross-plate to move upwardly. The cam is further provided with a third cross-plate which is parallel to the second cross-plate and is located directly below the second cross-plate. The third cross-plate is located directly below the second cross-plate and is fixedly connected to the third cross-plate to drive the cam to rotate. The lower end surface of the second cross-plate is also fixedly connected to a vertically arranged limit rod, and a limit plate which cooperates with the lower end surface of the third cross-plate is fixedly connected to the limit rod. A third return spring which can drive the second cross-plate to move upwardly is also provided between the third cross-plate and the second cross-plate. The third return spring is coiled on the limit rod, and the third motor is connected to the controller. The conveying device comprises two sets, and the two sets of conveying devices are respectively arranged on the front and rear sides of the cutting platform. The conveying device comprises an active roller arranged on the second frame and capable of rotating. The second frame is fixedly provided with a fourth motor for driving the active roller to rotate. A driven roller cooperating with the active roller is arranged above the active roller. The second frame is also fixedly provided with a fifth cylinder for driving the driven roller to rise and fall. A bearing is arranged on the piston rod of the fifth cylinder, and the end of the driven roller is sleeved on the bearing. The second frame is also fixedly provided with a fifth sensor and a sixth sensor for detecting the position of the paper. The fifth sensor and the sixth sensor are both located on the front side of the conveying device on the front side of the cutting platform. The fourth motor, the fifth cylinder, the fifth sensor and the sixth sensor are respectively connected to the controller. A material receiving platform is also fixedly provided at the rear end of the second frame of the cutting mechanism. The material receiving platform is gradually inclined downward from front to back. The front end of the material receiving platform is lower than the active roller of the conveying device located on the rear side of the cutting platform. Two limit stops for limiting the position of paper are fixedly connected to the material receiving platform.

2. The fully automatic paper cutting machine according to claim 1, characterized in that: The automatic feeding mechanism includes a first frame, a feeding port is provided on the first frame, a material platform that can only move up and down and a lifting drive device that can drive the material platform to rise and fall and approach the feeding port are provided in the first frame, a first sensor for detecting the height of paper above the material platform and a second sensor for detecting whether there is paper above the material platform are provided above the material platform, the lifting drive device, the first sensor and the second sensor are connected to the controller; the lifting drive device includes a connecting seat fixedly arranged on the material platform, a vertically arranged lead screw is screwed on the connecting seat, a first motor that drives the lead screw to rotate is connected to the lower end of the lead screw, the first motor is connected to the controller, a vertically arranged first guide rail is also fixedly connected to the first frame, and a slider that can slide along the first guide rail is fixedly provided on the material platform.

3. The fully automatic paper cutting machine according to claim 2, characterized in that: Two mutually parallel cross bars are fixedly arranged on the front and rear sides of the upper end surface of the material platform, and a support plate is fixedly arranged between the upper ends of the two cross bars; a paper width adjustment device located above the material platform is provided on the first frame, and the paper width adjustment device comprises a first guide rod fixedly arranged on the first frame and parallel to the cross bar, and two mutually parallel width adjustment plates are arranged on the first guide rod, and the width adjustment plates are perpendicular to the first guide rod, one of which is fixedly arranged on the first guide rod, and the other is sleeved on the first guide rod and can slide along the first guide rod; a rotatable screw is also provided on the first frame, which is parallel to the first guide rod, and the width adjustment plate sleeved on the first guide rod is screwed with the screw, and when the upper end surface of the support plate moves to a position higher than the lower end of the width adjustment plate along with the material platform, the support plate is located between the two width adjustment plates, and the width adjustment plate is located between the two cross bars; a knob driving the screw to rotate is fixedly connected to the end of the screw, and the first sensor is fixedly arranged on the first guide rod.

4. The fully automatic paper cutting machine according to claim 3, characterized in that: The paper grabbing device includes a first cylinder fixedly arranged on the first frame in a transverse direction, the outer end of the piston rod of the first cylinder is vertically fixedly connected to a transversely arranged crossbeam, and the piston rod of the first cylinder is perpendicular to the first guide rod; the first frame is also provided with a guide hole, in which a second guide rod parallel to the piston rod of the first cylinder is sleeved, and the outer end of the second guide rod is fixedly connected to the crossbeam; a second cylinder arranged vertically is fixedly arranged on the crossbeam, the lower end of the piston rod of the second cylinder is fixedly connected to a cross tube of a hollow structure, a plurality of hollow tubes arranged vertically and connected to the inner cavity of the cross tube are fixedly arranged on the cross tube, a rubber suction cup of a trumpet-shaped structure with an opening downwardly arranged is fixedly connected to the lower end of the hollow tube, a hose is connected to the cross tube, and an air pump is fixedly connected to the hose, and when the piston rod of the first cylinder does not extend outward, the second cylinder is located directly above the feeding port; the first frame is also fixedly provided with a buffer for buffering the crossbeam and a third sensor for detecting the position of the crossbeam; the first cylinder, the second cylinder, the air pump, and the third sensor are respectively connected to the controller.

5. The fully automatic paper cutting machine according to claim 4, characterized in that: The deflection correction and positioning mechanism includes a deflection correction platform, and two first grooves parallel to each other are provided on the deflection correction platform near the automatic feeding mechanism, each of the first grooves is provided with a conveyor belt, and the conveying direction of the conveyor belt is parallel to the crossbeam, and each conveyor belt is connected to a second motor for driving the conveyor belt to run; the deflection correction platform is also provided with a second groove perpendicular to the first groove, and the second groove is provided with a bottom plate which can only move back and forth along the length direction of the second groove, the upper end surface of the bottom plate is flush with the upper end surface of the deflection correction platform, and a through hole is provided on the bottom plate, and a third cylinder driving the bottom plate to move along the length direction of the second groove is fixedly provided under the deflection correction platform. A third guide rod is fixedly provided on the lower end surface of the deflection correction platform, and a fixed block fixedly arranged on the lower end surface of the bottom plate is sleeved on the third guide rod. A pressure plate parallel to the bottom plate is provided on the side, and a fourth cylinder arranged vertically is fixedly provided under the deflection correction platform, and the piston rod of the fourth cylinder passes through the through hole on the bottom plate and is fixedly connected to the pressure plate; a limit block for limiting the position of paper is also provided on the bottom plate, and the limit block is perpendicular to the conveying direction of the conveyor belt; two fourth sensors for detecting the position of paper are provided above the deflection correction platform, and the two fourth sensors are respectively located on the outsides of the two conveyor belts; the second motor, the third cylinder, the fourth cylinder, and the fourth sensor are respectively connected to the controller; a separation roller for preventing paper from sticking is also installed on the first frame, and the separation roller is parallel to the crossbeam, and the surface of the separation roller is provided with anti-slip grooves, and the separation roller is located between the feeding port and the deflection correction platform, and the separation roller is higher than the height of the paper on the material platform.

6. The fully automatic paper cutting machine according to claim 5, characterized in that: The clamping device includes at least two mounting brackets located above the deflection correcting platform, a gap being left between the mounting bracket and the deflection correcting platform, the mounting bracket being provided with mounting holes penetrating through the upper and lower ends of the mounting bracket, the mounting holes being located directly above the conveyor belt, two longitudinally arranged steel balls being provided in the mounting holes, the diameter of the steel balls being equal to the diameter of the mounting holes and the diameter of the steel balls being greater than the height of the gap; a base being fixedly provided between the mounting bracket and the deflection correcting platform; a mounting rod being fixedly connected to the mounting bracket and being parallel to the crossbeam, a first elastic pressing piece being fixedly provided on the mounting rod and being capable of being pressed against the deflection correcting platform, a connecting beam being fixedly connected to the mounting bracket, a second elastic pressing piece being capable of being pressed against the deflection correcting platform being fixedly connected to the connecting beam, the direction of the first elastic pressing piece being opposite to the conveying direction of the conveyor belt, the front end of the first elastic pressing piece being inclined upward, and the second elastic pressing piece being arranged along the conveying direction of the conveyor belt.

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