Automatic cutting equipment

Abstract

The present invention discloses an automatic cutting device, which solves the problems of low automation level, low cutting accuracy and easy scratching and damage of saw blades and materials in existing cutting machines. The automatic cutting device comprises a frame assembly, a cutting assembly, a feeding assembly, a discharging assembly and a vacuum chip suction device. The feeding claw is controlled by a servo motor to slide and feed the material on a slide rail. The servo motor has high accuracy and the material accuracy after cutting is better. An anti-scratch wheel that can be lifted and lowered is provided at the feed port to prevent scratching of the material. A front end limit part and a rear end limit part are provided in the shell. The material is limited by the front end limit part and the rear end limit part, and a liftable saw blade is provided between the front end limit part and the rear end limit part, which can not only ensure the stability of the material during the sawing process, but also avoid damage to the saw blade. A vacuum chip suction device is provided under the cutting assembly, which can better suck and discharge chips and prevent debris from flying around during the chip suction process.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting machines, in particular to an automatic cutting device. Background Art

[0002] The cutting device is a common machine in factories. Many materials need to be cut before they can be processed again or become parts to be used. In the existing technology, there are many types of cutting machines, including laser cutting machines, flame cutting machines, plasma cutting machines, water cutting machines and knife cutting machines, etc. Among them, knife cutting machines are the first cutting machines to appear and are also the most common cutting machines. Conventional knife cutting machines have a low degree of automation, and during the cutting process, the knife is easily damaged, the material is inevitably damaged, and the error value is also large. For some items with large tolerance requirements, ordinary knife cutting machines cannot meet their requirements. Summary of the Invention

[0003] The present invention is made in consideration of the above-mentioned problems. The purpose of the invention is to provide an automatic cutting device that can realize automatic processing and cutting, improve processing accuracy, and prevent damage to the tool or material.

[0004] To achieve the above object, the present invention provides an automatic cutting device, comprising:

[0005] A rack assembly, the rack assembly comprising an upper rack and a lower rack;

[0006] A cutting assembly, comprising a housing, a saw blade, and a drive mechanism, wherein the housing is disposed on the upper frame and is provided with a feed port and a discharge port, and the saw blade is liftable within the housing by the drive mechanism;

[0007] A feeding assembly, comprising a slide rail, a feeding claw, and a servo motor, wherein the slide rail is provided with a feeding end and a fixed end, the feeding end being located below the feed port, the servo motor being disposed on the fixed end, the feeding claw being slidably disposed on the slide rail, and the feeding claw being connected to the output end of the servo motor;

[0008] A discharging assembly is arranged below the discharging port.

[0009] According to the automatic cutting equipment described above, the cutting assembly also includes a guiding mechanism and a workpiece limiting mechanism, the workpiece limiting mechanism includes a front end limiting portion and a rear end limiting portion, the saw blade is raised and lowered between the front end limiting portion and the rear end limiting portion by the driving mechanism, the guiding mechanism includes a front guide member and a rear guide member, the front guide member is arranged on the outside of the feed port, and the rear guide member is arranged between the discharge port and the rear end limiting portion.

[0010] According to the automatic cutting equipment described above, the front end limiting part and the rear end limiting part both include a support plate, a pressure plate, a limiting wheel, a pressure rod, a connecting shaft and a first motor. A sliding groove is provided on the support plate. The pressure plate is movably arranged above the support plate through a connecting rod. The pressure rod is connected to the top of the pressure plate, and both ends of the pressure rod are connected to one of the connecting shafts. The first motor drives the connecting shaft to move up and down.

[0011] According to the automatic cutting equipment described above, the upper end of the connecting shaft is movably connected to the side of the pressing plate, and the lower end is fixedly connected to the side of the support plate, and the limiting wheel is sleeved on the connecting shaft.

[0012] According to the automatic cutting equipment described above, one end of the connecting shaft is connected to one end of the clamping rod, and the other end passes through the upper frame and is arranged in the lower frame, and the connecting shaft is located on the outside of one end of the upper frame and is sleeved with a return spring, one end of the return spring is connected to the bottom of the clamping rod, and the other end is connected to the upper frame.

[0013] According to the automatic cutting equipment described above, the first motor is arranged in the lower frame, and a connecting plate is provided under the first motor, an output shaft is provided on the lower side of the first motor and connected to the connecting plate, and both ends of the connecting plate are connected to the connecting shaft.

[0014] According to the automatic cutting equipment described above, the front guide member includes several front guide wheels and anti-scratch wheels, and the anti-scratch wheels are arranged in a liftable manner between the front guide wheel and the feed port. The rear guide member includes several rear guide wheels, and several of the rear guide wheels are arranged between the discharge port and the rear end limit portion.

[0015] According to the automatic cutting equipment described above, the driving mechanism includes a second motor, a linear guide rail and a lifting cylinder. A rotating shaft is provided on one side of the second motor to connect with the saw blade. The linear guide rail is vertically arranged in the outer shell. The second motor is slidably connected to the linear guide rail. The lifting cylinder is arranged above the second motor, and a lifting shaft is provided at the bottom of the lifting cylinder to connect with the second motor.

[0016] According to the automatic cutting equipment described above, the discharge component is configured as a conveyor belt, a front-end sensor is provided on the side of the conveyor belt close to one end of the discharge port, and a rear-end sensor is provided on the side of the conveyor belt away from one end of the discharge port.

[0017] According to the automatic cutting equipment described above, it also includes a vacuum chip suction device, which is arranged in the lower frame and communicates with the cavity of the shell.

[0018] The present invention has the following beneficial effects:

[0019] 1. The cutting component, feeding component and discharging component can all work automatically, and the overall degree of automation is high.

[0020] 2. The lifting cylinder can control the lifting of the saw blade, and the second motor can control its cutting speed, which can ensure the temperature stability of the cutting speed. The up and down lifting and cutting can avoid the saw blade's relatively tough cutting process and prevent the saw blade from being damaged.

[0021] 3. The feeding component adopts servo motor to provide power for feeding, which is more stable than manual feeding, with smaller cutting error and smaller tolerance of formed products;

[0022] 4. The chip suction device adopts a vacuum chip suction device, which has better guidance and better chip suction effect;

[0023] 5. Equipped with anti-scratch wheels, which can rotate and lift to avoid scratching the material to a large extent. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0025] Figure 2 It is a schematic diagram of the assembly of the feeding device and the frame of the present invention;

[0026] Figure 3 It is a schematic structural diagram of the sliding connection portion of the present invention;

[0027] Figure 4 It is a schematic diagram of the assembly of the cutting assembly and the lower frame of the present invention;

[0028] Figure 5 It is a schematic diagram of the local structure of the cutting assembly of the present invention;

[0029] Figure 6 It is a schematic diagram of the partial structure of the cutting assembly of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the vacuum debris suction device of the present invention. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0032] like Figure 1-7 As shown, an automatic cutting device comprises:

[0033] The rack assembly 1000 includes an upper rack 1100 and a lower rack 1200 . A partition 1110 is provided on the upper rack 1100 , and the partition 1110 separates the upper rack 1100 from the lower rack 1200 .

[0034] The cutting assembly 2000 includes a housing 2100, a saw blade 2200 and a driving mechanism. The housing 2100 is arranged on the upper frame 1100, and the housing 2100 is provided with a feed port 2110 and a discharge port 2120. The saw blade 2200 can be lifted and lowered in the housing 2100 by the driving mechanism. The housing 2100 is arranged on the partition 1110. The housing 2100 can be used to provide a certain degree of protection for the saw blade 2200 therein. The saw blade 2200 can be lifted and lowered in the housing 2100. The saw blade 2200 can be raised and lowered at any time to cut the material entering the housing 2100. As we know, it is easy to get stuck when sawing objects. Most of the time, the cutting of this part is completed by increasing the force, but it is easy to cause damage to the saw blade 2200. When we manually saw trees, we can pull out the saw after it gets stuck, and it will be relatively easy to move it. Similarly, in this embodiment, the lifting of the saw blade 2200 can facilitate the sawing of the saw blade 2200 and prevent it from being damaged.

[0035] The feeding assembly 3000 includes a slide rail 3100, a feeding claw 3200 and a servo motor 3300. The slide rail 3100 is provided with a feeding end 3110 and a fixed end 3120. The feeding end 3110 is located below the feed port 2110. The servo motor 3300 is provided on the fixed end 3120. The feeding claw 3200 can be slidably provided on the slide rail 3100, and the feeding claw 3200 is connected to the output end of the servo motor 3300. The material is generally installed manually to the feeding end. On the material gripper 3200, the servo motor 3300 drives the material to slide on the slide rail 3100 through the feeding gripper 3200, and sends it to the feed port 2110 for the saw blade 2200 to saw the material. Since the servo motor 3300 is used for feeding, the feeding distance each time is controlled more accurately, and the size error of the cut product is smaller. Of course, the feeding component 3000 also includes a support frame 3400 for providing support for the slide rail 3100. After the sawing is completed, the tail material is manually removed.

[0036] Preferably, the feeding gripper 3200 includes:

[0037] The sliding connection part 3210 can be slidably connected to the slide rail 3100 and connected to the output shaft of the servo motor 3300. The output shaft of the servo motor 3300 drives the sliding connection part 3210 to slide on the slide rail 3100, and then drives the entire feeding claw 3200 to move together to perform the feeding action.

[0038] Preferably, the output shaft of the servo motor 3300 is arranged on both sides of the slide rail 3100, and the sliding part 3210 includes a top plate 3211 and a side part 3212. Both sides of the top plate 3211 are connected to the top of a side part 3212. A slide groove is provided on the inner side of the side part 3212, and the slide groove is named the second slide groove 3212a. The output shaft of the servo motor 3300 is connected to the slide groove, and its side part 3212 can slide on the output shaft. The function of the output shaft is consistent with the function of the output shaft, driving the feeding claw 3200 to move together.

[0039] The fixed part includes a first fixed plate 3221 and a second fixed plate 3222. The first fixed plate 3221 is attached to the top of the sliding part 3210, and one end of the second fixed plate is connected to the first fixed plate. The fixed part is mainly used to connect the gripper body 3230 and the sliding part 3210, so that the sliding part 3210 can drive the gripper body 3230 to move together.

[0040] Preferably, the fixed connection part is L-shaped as a whole, a first positioning hole is provided on the top plate 3211, a first positioning hole is provided on the first fixing plate, the first positioning hole is connected with the second positioning hole, the second fixing plate is vertically connected with the first fixing plate, and a positioning piece is provided in the connecting hole 1111 between the first positioning hole and the second positioning hole to fix the fixed connection part and the sliding part 3210.

[0041] The gripper body 3230 is provided with a connecting end 3231 and a working end 3232. The connecting end 3231 is connected to the second fixed plate, and the working end 3232 is provided with a positioning component. In this embodiment, since the top plate 3211 of the sliding part 3210 is arranged parallel to the slide rail 3100, the gripper body 3230 vertically connected to the second fixed plate is also parallel to the slide rail 3100, which is convenient for driving the material to move along the direction of the slide rail 3100. The positioning component thereon is used to fix the material to prevent the material from shaking and ensure its processing accuracy.

[0042] The positioning assembly includes a limiter 3233 and a clamping member. The limiter 3233 is arranged on the outer end face of the working end 3232, and the clamping member is arranged between the two limiters 3233. The clamping member is the main positioning member, and the limiter 3233 is used to limit the opening range of the clamping member.

[0043] The clamping member includes a first clamping portion 3234a and a second clamping portion 3234b. The first clamping portion 3234a is fixed on the outer end face of the working end 3232. The second clamping portion 3234b is rotatably arranged on the working end 3232 and can be closed with the first clamping portion 3234a. When installing the material, one end of the material is fitted with the end face of the working end 3232, and the second clamping portion 3234b is rotated toward the first clamping portion 3234a to clamp the material and prevent the material from shaking.

[0044] The first clamping portion 3234a is provided with a first clamping surface, and the second clamping portion 3234b is provided with a second clamping surface. Both the first clamping surface and the second clamping surface are provided with barbs, which can make the connection between the first clamping surface and the second clamping surface and the material more stable when clamping the material.

[0045] The discharge assembly 4000 is arranged below the discharge port 2120 and is used to transport the finished product away from the discharge port 2120.

[0046] Preferably, the discharge component 4000 is configured as a conveyor belt 4100, and a front-end sensor is provided on the side of the conveyor belt 4100 close to the discharge port 2120, and a rear-end sensor is provided on the side of the conveyor belt 4100 away from the discharge port 2120. When the front-end sensor senses an object, the conveyor belt 4100 starts working. When the rear-end sensor senses an object, it proves that the conveyor belt 4100 is full of finished products, and the conveyor belt 4100 stops working.

[0047] The cutting assembly 2000 also includes a guide mechanism 2400 and a workpiece limiting mechanism. The workpiece limiting mechanism includes a front end limiting portion 2510 and a rear end limiting portion 2520. The saw blade 2200 can be raised and lowered between the front end limiting portion 2510 and the rear end limiting portion 2520 through a driving mechanism. The guide mechanism 2400 includes a front guide member and a rear guide member. The front guide member is arranged on the outside of the feed port 2110, and the rear guide member is arranged between the discharge port 2120 and the rear end limiting portion 2520. The front guide member is used to guide the material from the outside of the feed port 2110 into the feed port 2110, and the rear guide member is used to guide the cut material out of the discharge port 2120.

[0048] The front-end limiting portion 2510 and the rear-end limiting portion 2520 each include a support plate 2511, a pressing plate 2512, a limiting wheel 2513, a pressing rod 2514, a connecting shaft 2515 and a first motor 2516. A chute is provided on the support plate 2511, which is named the first chute 2511a. The pressing plate 2512 is movably arranged above the support plate 2511 through a connecting rod 2517. The pressing rod 2514 is connected to the top of the pressing plate 2512, and both ends of the pressing rod 2514 are connected to a connecting shaft 2515. The first motor 2516 drives the connecting shaft 2515. 515 moves up and down, and the front end of the material moves to the rear end limit part 2520 through the feeding claw 3200 and the front guide, and the front end limit part 2510 and the rear end limit part 2520 are used to fix the two ends of a section of the material to prevent it from shaking during cutting, resulting in large cutting errors. When the first motor 2516 drives the connecting shaft 2515 to move downward, it drives the clamping rod 2514 to move downward, and drives the clamping plate 2512 to move downward. The clamping plate 2512 will clamp the material to prevent it from moving. A connecting shaft 2515 is provided at both ends of the clamping rod 2514.

[0049] The upper end of the connecting shaft 2515 is movably connected to the side of the clamping plate 2512, and the lower end is fixedly connected to the side of the support plate 2511. The limiting wheel 2513 is sleeved on the connecting rod 2517, and the clamping plate 2512 can move up and down along the connecting rod 2517. The position of the clamping plate 2512 is determined by the position of the clamping rod 2514. The limiting wheels 2513 are set on both sides of the support plate 2511 to limit the movement of the material toward the two sides of the support plate 2511.

[0050] One end of the connecting shaft 2515 is connected to one end of the clamping rod 2514, and the other end passes through the upper frame 1100 and is arranged in the lower frame 1200. The connecting shaft 2515 is located on the outer side of one end of the upper frame 1100 and is sleeved with a return spring 2515a. One end of the return spring 2515a is connected to the bottom of the clamping rod 2514, and the other end is connected to the upper frame 1100. The bottom end of the return spring 2515a is connected to the partition 1110. When the first motor 2516 drives the connecting shaft 2515 to move downward, the clamping rod 2514 will compress the return spring 2515a. When the first motor 2516 stops working, the return spring 2515a will provide an upward force to the clamping rod 2514, which can save more energy.

[0051] The first motor 2516 is arranged in the lower frame 1200, and a connecting plate 2516a is provided below the first motor 2516. An output shaft is provided on the lower side of the first motor 2516 and connected to the connecting plate 2516a. Both ends of the connecting plate 2516a are connected to the connecting shaft 2515. Both ends of the connecting plate 2516a are connected to the bottom end of the connecting shaft 2515, and synchronously drive the two connecting shafts 2515 to move together.

[0052] The front guide member includes several front guide wheels 2411 and anti-scratch wheels 2412. The anti-scratch wheels 2412 can be raised and lowered between the front guide wheels 2411 and the feed port 2110. The rear guide member includes several rear guide wheels 2421. Several rear guide wheels 2421 are arranged between the discharge port 2120 and the rear end limit portion 2520. The front guide wheels 2411 and the anti-scratch wheels 2412 are both arranged on the outside of the feed port 2110. Of course, the front guide wheels 2411, the anti-scratch wheels 2412 and the rear guide wheels 2421 can all be rotated. The material is connected to the anti-scratch wheels 2412. When the material is subjected to downward force, the anti-scratch wheels 2412 can be adjusted downward to prevent scratches on the material.

[0053] The driving mechanism includes a second motor 2310, a linear guide rail 2320 and a lifting cylinder 2330. A rotating shaft is provided on one side of the second motor 2310 to connect with the saw blade 2200. The linear guide rail 2320 is vertically arranged in the outer shell 2100. The second motor 2310 is slidably connected with the linear guide rail 2320. The lifting cylinder 2330 is arranged above the second motor 2310, and a lifting shaft is provided at the bottom of the lifting cylinder 2330 to connect with the second motor 2310. The saw blade 2200 is fixed by the second motor 2310 and is driven by the second motor 2310 to rotate and saw. The lifting cylinder 2330 can drive the second motor 2310 to move up and down on the linear guide rail 2320, thereby driving the saw blade 2200 to move up and down.

[0054] The vacuum scrap suction device 5000 is further included. The vacuum scrap suction device 5000 is disposed in the lower frame 1200 and communicates with the cavity of the housing 2100. The cavity in the housing 2100 is named the first accommodating cavity. The vacuum scrap suction device 5000 includes:

[0055] The sealed housing 5100 is provided with a second accommodating chamber, which is communicated with the first accommodating chamber. After the communication, the gas and debris in the first accommodating chamber can enter the second accommodating chamber.

[0056] The gas source component 5200 is used to discharge the gas in the second accommodating chamber. After the gas in the second accommodating chamber is discharged, the air pressure in the second accommodating chamber will be much lower than the air pressure in the first accommodating chamber. The gas will flow into the low-pressure second accommodating chamber and drive the debris to move into the second accommodating chamber, so that the debris can be collected in a targeted manner to prevent the debris from flying around.

[0057] The power supply component 5300 is used to provide power to the gas source component 5200 .

[0058] The sealed shell 5100 includes a bottom plate 5120, a first side plate 5130, a second side plate 5140 and a third side plate 5150. The first side plate 5130 and the second side plate 5140 are arranged opposite to each other. One end of the bottom plate 5120 is connected to the bottom of the first side plate 5130, and the other end is connected to the bottom of the second side plate 5140. The third side plate 5150 is arranged between the first side plate 5130 and the second side plate 5140, and the third side plate 5150, the first side plate 5130, the second side plate 5140 and the bottom plate 5120 are surrounded to form the sealed shell 5100.

[0059] The tops of the first side plate 5130 , the second side plate 5140 and the third side plate 5150 are all connected to the bottom of the partition plate 1110 . The partition plate 1110 is provided with a through hole 1111 , which is used to connect the first accommodating cavity and the second accommodating cavity.

[0060] A transport portion 5121 is provided at the bottom extending downward for transporting debris.

[0061] The horizontal height of the bottom of the first side plate 5130 is lower than the horizontal height of the bottom of the second side plate 5140. The bottom plate 5120 is tilted between the first side plate 5130 and the second side plate 5140, and a chip removal hole 5131 is provided at the lower part of the first side plate 5130. The bottom plate 5120 is tilted to facilitate the movement of debris toward the lower end and discharge it from the chip removal hole 5131.

[0062] A sealing plate 5132 is provided in the chip removal hole 5131. The sealing plate 5132 is used to seal or open the second accommodating chamber. The sealing plate 5132 is rotatably or detachably provided in the chip removal hole 5131. Of course, the sealing plate 5132 and the inner wall of the chip removal hole 5131 are sealed. When the vacuum chip suction device 5000 is working, the sealing plate 5132 is used to seal the second accommodating chamber. When chip removal is required, the sealing plate 5132 is used to open the second accommodating chamber.

[0063] An observation portion 5133 is provided on the first side plate 5130 , and the observation portion 5133 can be configured as an observation glass window or other sealable components.

[0064] The present invention provides an automatic cutting device, which controls a feeding claw to slide and feed on a slide rail through a servo motor. The servo motor has high precision and the precision of the material after cutting is better. An anti-scratch wheel that can move up and down is provided at the feed port to prevent scratches on the material. A front end limit part and a rear end limit part are provided in the shell, and the material is limited by the front end limit part and the rear end limit part. A liftable saw blade is provided between the front end limit part and the rear end limit part, which can not only ensure the stability of the material during the sawing process, but also avoid damage to the saw blade. A vacuum chip suction device is provided under the cutting component, which can better suction and remove chips and prevent debris from flying around during the chip suction process.

[0065] The technical solutions of the present invention have been described in detail above with reference to the accompanying drawings, and the embodiments described are intended to facilitate understanding of the concepts of the present invention. The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments, without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. An automatic cutting device, characterized in that: include: A rack assembly, the rack assembly comprising an upper rack and a lower rack; A cutting assembly, comprising a housing, a saw blade, and a drive mechanism, wherein the housing is disposed on the upper frame and is provided with a feed port and a discharge port, and the saw blade is liftable within the housing by the drive mechanism; A feeding assembly, comprising a slide rail, a feeding claw, and a servo motor, wherein the slide rail is provided with a feeding end and a fixed end, the feeding end being located below the feed port, the servo motor being disposed on the fixed end, the feeding claw being slidably disposed on the slide rail, and the feeding claw being connected to the output end of the servo motor; A discharge assembly, the discharge assembly being arranged below the discharge port; The cutting assembly further includes a guide mechanism and a workpiece limiting mechanism, the workpiece limiting mechanism includes a front end limiting portion and a rear end limiting portion, the saw blade is arranged between the front end limiting portion and the rear end limiting portion and can be raised and lowered by the driving mechanism, the guide mechanism includes a front guide member and a rear guide member, the front guide member is arranged outside the feed port, and the rear guide member is arranged between the discharge port and the rear end limiting portion; The front guide member includes a plurality of front guide wheels and anti-scratch wheels, the anti-scratch wheels are liftably arranged between the front guide wheels and the feed port, and the rear guide member includes a plurality of rear guide wheels, the plurality of rear guide wheels are arranged between the discharge port and the rear end limit portion; The front-end limiting part and the rear-end limiting part each include a support plate, a pressure plate, a limiting wheel, a pressure rod, a connecting shaft and a first motor. A slide groove is provided on the support plate. The pressure plate is movably arranged above the support plate through a connecting rod. The pressure rod is connected to the top of the pressure plate, and both ends of the pressure rod are connected to one of the connecting shafts. The first motor drives the connecting shaft to move up and down. One end of the connecting shaft is connected to one end of the clamping rod, and the other end passes through the upper frame and is arranged in the lower frame, and a return spring is sleeved on the outside of one end of the connecting shaft located on the upper frame, and one end of the return spring is connected to the bottom of the clamping rod, and the other end is connected to the upper frame.

2. An automatic cutting device according to claim 1, characterized in that: The upper end of the connecting shaft is movably connected to the side of the pressing plate, and the lower end is fixedly connected to the side of the supporting plate. The limiting wheel is sleeved on the connecting rod.

3. The automatic cutting device according to claim 1, characterized in that: The first motor is arranged in the lower frame, and a connecting plate is provided below the first motor. An output shaft is provided on the lower side of the first motor and connected to the connecting plate. Both ends of the connecting plate are connected to the connecting shaft.

4. The automatic cutting device according to claim 1, characterized in that: The driving mechanism includes a second motor, a linear guide rail and a lifting cylinder. A rotating shaft is provided on one side of the second motor to connect with the saw blade. The linear guide rail is vertically arranged in the housing. The second motor is slidably connected to the linear guide rail. The lifting cylinder is arranged above the second motor, and a lifting shaft is provided at the bottom of the lifting cylinder to connect with the second motor.

5. The automatic cutting device according to claim 1, characterized in that: The discharging component is configured as a conveyor belt, a front end sensor is provided on the side of the conveyor belt close to one end of the discharging port, and a rear end sensor is provided on the side of the conveyor belt away from one end of the discharging port.

6. The automatic cutting device according to claim 1, characterized in that: It also includes a vacuum debris suction device, which is arranged in the lower frame and communicated with the cavity of the shell.

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