A knife-beating device based on a knife-beating barrel

Abstract

This invention relates to the field of tool-changing cylinder technology, and in particular to a tool-changing device based on a tool-changing barrel, comprising a booster cylinder and an oil cylinder. A piston one and a piston two are slidably connected to the inner sides of the booster cylinder and the oil cylinder, respectively. A connecting hole is provided at the lower end of the booster cylinder. A pressure rod one, penetrating the inner side of the connecting hole, is fixed to the lower end of the piston one. A pressure rod two, extending to the outer side of the oil cylinder, is fixed to the lower end of the piston two. The tool-changing barrel is connected to the lower end of the pressure rod two via a universal joint mechanism. A pressure-distributing mechanism is fixed to the outer side of the pressure rod two. This invention allows the tool-changing barrel and the pressure rod two to be flexibly connected at any angle via the universal joint mechanism. When the lower end of the tool-changing barrel contacts the upper end of the spindle, the lower end of the tool-changing barrel can completely fit against the upper end of the spindle, thereby ensuring that the pressure at the lower end of the tool-changing barrel is evenly transmitted to the upper end of the spindle, preventing uneven pressure distribution from causing deformation of the upper end of the spindle.

Description

Technical Field

[0001] This invention relates to the field of knife-cutting cylinder technology, and in particular to a knife-cutting device based on a knife-cutting barrel. Background Technology

[0002] In modern CNC milling machines, different milling cutters need to be flexibly changed according to the machining steps, machining processes, and requirements of machining different materials. Modern milling machine spindles basically use the elastic deformation and recovery of disc springs to open and clamp the milling cutter holder. When it is necessary to remove the milling cutter, a large pressure is applied to the upper end of the milling machine spindle by a tool-removing cylinder to force the disc spring to deform, thereby releasing the clamping of the milling cutter holder.

[0003] To ensure that the pressure from the telescopic end of the tool-changing cylinder is evenly applied to the upper end of the spindle, a tool-changing barrel is connected to the telescopic end of the tool-changing cylinder. The tool-changing barrel applies pressure evenly to the upper end of the spindle. However, to ensure the parallelism between the lower end of the tool-changing barrel and the upper end face of the spindle, and to ensure that the lower end of the tool-changing barrel can be completely in contact with the upper end face of the spindle, thereby evenly transmitting pressure to the upper end face of the spindle, the tool-changing barrel needs to be manually leveled. If the lower end of the tool-changing barrel is not completely parallel to the upper end face of the spindle, it will only make point contact with the upper end face of the spindle, resulting in stress concentration on the upper end face of the spindle, which may cause deformation or damage to the upper end face of the spindle.

[0004] However, the telescopic end of the existing tool-changing cylinder is fixedly connected to the tool-changing barrel. The tool-changing barrel and the tool-changing cylinder are collinear and cannot produce angular changes. Therefore, it is very easy for the lower end of the tool-changing barrel to make point contact with the upper end face of the spindle instead of forming surface contact. This can easily lead to stress concentration on the upper end face of the spindle, resulting in end face deformation. Summary of the Invention

[0005] The purpose of this invention is to provide a knife-making device based on a knife-making barrel, so as to solve the problems mentioned in the background art.

[0006] The technical solution of this invention is: a knife-making device based on a knife-making barrel, comprising a booster air cylinder and an oil cylinder, wherein a piston one and a piston two are slidably connected to the inner sides of the booster air cylinder and the oil cylinder respectively, a connecting hole is provided at the lower end of the booster air cylinder, a pressure rod one is fixed to the lower end of the piston one penetrating the inner side of the connecting hole, a pressure rod two is fixed to the lower end of the piston two extending to the outer side of the oil cylinder, the lower end of the pressure rod two is connected to the knife-making barrel through a universal joint connection mechanism, and a pressure-dividing mechanism is fixed to the outer side of the pressure rod two; the universal joint connection mechanism includes an upper universal joint fixed to the lower end of the pressure rod two and a lower universal joint fixed to the upper end of the knife-making barrel. The upper and lower universal joints are connected by an intermediate rod; the pressure-distributing mechanism includes a sealing shell fixed to the outside of the pressure rod, multiple racks slidably arranged on the inner side of the sealing shell, multiple outer cylinders fixed on the lower side of the sealing shell, telescopic cylinders slidably inserted at the lower ends of the multiple outer cylinders, screws threadedly connected to the inner sides of the multiple telescopic cylinders, the upper end of each screw rotatably connected to the inner side of the sealing shell, and a gear meshing with the racks fixed at the upper end of each screw; it also includes multiple piston pushing mechanisms that drive the multiple racks to move; and a pre-pressurization mechanism that pre-injects hydraulic oil into the inner side of the oil cylinder.

[0007] Preferably, the piston pushing mechanism includes a piston cylinder fixed inside the sealing shell, a piston plate slidably connected to the inner side of the piston cylinder, a piston rod extending to the outer side of the piston cylinder fixed at one end of the piston plate, one end of the piston rod being fixedly connected to one end of the rack, and a spring sleeved on the outer side of the piston rod being connected to one end of the piston plate.

[0008] Preferably, one end of the piston cylinder is connected to the inside of the sealing shell through an opening, and the other end of the piston cylinder is connected to a connecting air pipe extending to the outside of the sealing shell.

[0009] Preferably, each of the multiple racks has a guide groove inside, and a fixing block is fixed on the inner side of the sealing shell at the position corresponding to each rack, and each fixing block is slidably connected to the inner side of the guide groove at the corresponding position.

[0010] Preferably, a sealing ring is fitted on the outer side of each telescopic cylinder, and the sealing ring is slidably adapted to the inner side of the outer cylinder.

[0011] Preferably, the lower ends of the plurality of outer cylinders are provided with open slide grooves, and the outer sides of the plurality of telescopic cylinders are fixed with sliders that are slidably connected to the inner side of the open slide grooves.

[0012] Preferably, the pre-compression mechanism includes a pre-compression cylinder fixed to the pressurizing cylinder, a piston three is slidably connected to the inner side of the pre-compression cylinder, and a connecting flow channel communicating with a connecting hole is opened at the lower end of the pre-compression cylinder.

[0013] Preferably, a spring is connected between the lower end of piston one and the lower inner end of the booster cylinder, and a spring is connected between the lower end of piston two and the lower inner end of the oil cylinder.

[0014] Preferably, the lower side of the booster cylinder has an exhaust port located on the side wall, and the lower side of the oil cylinder has an exhaust channel located on the side wall.

[0015] Preferably, the lower end of the oil cylinder is fixed with a mounting plate, and multiple mounting studs are installed through the interior of the mounting plate, with the pressure rod movably passing through the interior of the mounting plate.

[0016] Preferably, the system further includes an air circuit system that sequentially injects compressed air into the pre-compression cylinder, the sealing shell, and the inner side of the booster cylinder. The air circuit system includes an air storage tank, an air pipe two connected to the upper end of the pre-compression cylinder, an air pipe three connected to one side of the sealing shell, and an air pipe one connected to the upper end of the booster cylinder. Each of the air pipes is equipped with an electromagnetic reversing valve. Each of the air pipes is connected to the inner side of the air storage tank through a diverter pipe. All three electromagnetic reversing valves are two-position three-way electromagnetic reversing valves. The system also includes an air pump for filling the inner side of the air storage tank with air to maintain air pressure.

[0017] The present invention provides an improved knife-making device based on a knife-making barrel, which has the following improvements and advantages compared with the prior art:

[0018] Firstly, this invention uses a universal connection mechanism to allow the cutter barrel and pressure rod two to be movably connected at any angle. When the lower end of the cutter barrel contacts the upper end of the main shaft, the lower end of the cutter barrel can be completely fitted against the upper end of the main shaft, thereby allowing the pressure at the lower end of the cutter barrel to be evenly transmitted to the upper end of the main shaft. At the same time, through the pressure-distributing mechanism, the downward pressure of pressure rod two is evenly transmitted to the upper end of the cutter barrel through multiple outer cylinders and multiple telescopic cylinders in the pressure-distributing mechanism. This allows the vertical downward pressure applied by the cutter barrel to be more evenly distributed on the upper end of the main shaft, preventing uneven pressure distribution from causing deformation of the upper end of the main shaft. It also prevents the main shaft from being subjected to lateral forces that could cause lateral compression.

[0019] Secondly, the present invention uses a pre-pressing mechanism to apply a small pressure to piston two. Piston two applies a small pressure to the cutter barrel in advance through pressure rod two and universal connection mechanism. The purpose is to make the cutter barrel move downward first, so that its lower end is fully attached to the upper end of the main shaft in advance. This makes it convenient for the pressure distribution mechanism to apply downward pressure evenly to the upper end of the cutter barrel, thereby facilitating the vertical transmission of pressure to the upper end of the cutter barrel. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 For the present invention Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 3 This is a schematic diagram of the first cross-sectional structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the second cross-sectional structure of the present invention;

[0025] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B;

[0026] Figure 6 This is a cross-sectional view of the pressure-distributing mechanism in this invention;

[0027] Figure 7 For the present invention Figure 6 A magnified structural diagram at point C.

[0028] Figure label:

[0029] 1. Booster cylinder; 2. Oil cylinder; 3. Piston 1; 4. Pressure rod 1; 5. Piston 2; 6. Pressure rod 2; 7. Knife barrel; 8. Upper universal joint; 9. Lower universal joint; 10. Intermediate rod; 11. Connecting hole; 12. Exhaust port; 13. Exhaust flow channel; 14. Spring 1; 15. Spring 2; 101. Sealing shell; 102. Outer cylinder; 103. Telescopic cylinder; 104. Screw; 105. Rack; 106. Gear; 107. Piston cylinder; 108. Piston plate; 109. 110. Piston rod; 111. Guide groove; 112. Fixing block; 113. Connecting air pipe; 114. Sealing ring; 115. Slider; 116. Opening slide groove; 117. Spring three; 201. Pre-compression air cylinder; 202. Piston three; 203. Connecting flow channel; 301. Air tank; 302. Air pump; 303. Diverter pipe; 304. Solenoid reversing valve; 305. Air pipe one; 306. Air pipe two; 307. Air pipe three; 401. Mounting plate; 402. Mounting stud. Detailed Implementation

[0030] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention provides an improved knife-making device based on a knife-making barrel. The technical solution of this invention is as follows:

[0032] like Figures 1 to 7 As shown, this embodiment of the invention provides a knife-breaking device based on a knife-breaking barrel, including a booster cylinder 1 and an oil cylinder 2. A piston 3 and a piston 5 are slidably connected to the inner sides of the booster cylinder 1 and the oil cylinder 2, respectively. A connecting hole 11 is provided at the lower end of the booster cylinder 1. A pressure rod 4, penetrating the inner side of the connecting hole 11, is fixed to the lower end of the piston 3. A pressure rod 6, extending to the outer side of the oil cylinder 2, is fixed to the lower end of the piston 5. The lower end of the pressure rod 6 is connected to the knife-breaking barrel 7 via a universal joint mechanism. A pressure-dividing mechanism is fixed to the outer side of the pressure rod 6. A mounting plate 401 is fixed to the lower end of the oil cylinder 2. Multiple mounting studs 402 are installed through the interior of the mounting plate 401. The pressure rod 6 movably penetrates the interior of the mounting plate 401. A spring 14 connects the lower end of the piston 3 to the lower inner side of the booster cylinder 1. A spring 14 connects the lower end of the piston 5 to the lower inner side of the oil cylinder 2. The device includes a spring 15; a universal joint mechanism including an upper universal joint 8 fixed to the lower end of the pressure rod 6 and a lower universal joint 9 fixed to the upper end of the cutter barrel 7, with an intermediate rod 10 connecting the upper universal joint 8 and the lower universal joint 9; a pressure dividing mechanism including a sealing shell 101 fixed to the outside of the pressure rod 6, multiple racks 105 slidably arranged on the inner side of the sealing shell 101, multiple outer cylinders 102 fixed to the lower side of the sealing shell 101, telescopic cylinders 103 slidably inserted into the lower ends of the multiple outer cylinders 102, screws 104 threadedly connected to the inner side of the multiple telescopic cylinders 103, the upper end of each screw 104 rotatably connected to the inner side of the sealing shell 101, and a gear 106 meshing with the rack 105 fixed to the upper end of each screw 104; it also includes multiple piston pushing mechanisms that drive the multiple racks 105 to move; and a pre-pressurization mechanism that pre-injects hydraulic oil into the inner side of the oil cylinder 2.

[0033] Furthermore, the piston pushing mechanism includes a piston cylinder 107 fixed inside the sealing shell 101, a piston plate 108 slidably connected to the inner side of the piston cylinder 107, a piston rod 109 extending to the outer side of the piston cylinder 107 fixed to one end of the piston plate 108, one end of the piston rod 109 fixedly connected to one end of the rack 105, and a spring 116 sleeved on the outer side of the piston rod 109 connected to one end of the piston plate 108.

[0034] When compressed air is introduced into the inner side of the sealing shell 101, high pressure is formed inside the sealing shell 101. The high-pressure air can push the piston plate 108 to move, thereby driving the piston rod 109 and the rack 105 to move, thereby driving the gear 106 to rotate, thereby driving the screw 104 to rotate. The screw 104 drives the telescopic cylinder 103 to move downward, so that the lower end of the telescopic cylinder 103 presses against the upper end of the tool-breaking barrel 7, thereby transmitting the pressure of the pressure rod 6 evenly to the upper end of the tool-breaking barrel 7 through multiple telescopic cylinders 103. The pressure can then be transmitted to the upper end of the milling machine spindle through the tool-breaking barrel 7.

[0035] Furthermore, one end of the piston cylinder 107 is connected to the interior of the sealing shell 101 through an opening, and the other end of the piston cylinder 107 is connected to a connecting air pipe 112 extending to the outside of the sealing shell 101.

[0036] The other end of each piston cylinder 107 is connected to the outside atmosphere through a connecting air pipe 112. When the air pressure inside the sealing shell 101 increases, air will enter from the opening at one end of each piston cylinder 107, thereby pushing the piston plate 108 to move.

[0037] Furthermore, each of the multiple racks 105 has a guide groove 110 inside, and a fixing block 111 is fixed on the inner side of the sealing shell 101 at the position corresponding to each rack 105. Each fixing block 111 is slidably connected to the inner side of the guide groove 110 at the corresponding position.

[0038] Under the sliding engagement of the fixed block 111 and the guide groove 110, the piston rod 109 can drive the rack 105 to move linearly. When multiple racks 105 move linearly, they drive multiple gears 106 to rotate through tooth meshing.

[0039] Furthermore, a sealing ring 113 is fitted on the outer side of each telescopic cylinder 103, and the sealing ring 113 is slidably adapted to the inner side of the outer cylinder 102.

[0040] A dynamic seal is formed between the outer cylinder 102 and the telescopic cylinder 103 by means of the sealing ring 113, which ensures the sealing performance while the two can move relative to each other, prevents the leakage of compressed air inside the sealing shell 101, and maintains the stability of the air pressure inside the sealing shell 101.

[0041] Furthermore, the lower ends of multiple outer cylinders 102 are provided with open sliding grooves 115 (such as...). Figure 2 As shown), the outer sides of multiple telescopic cylinders 103 are each fixed with a slider 114 that is slidably connected to the inner side of the open slide groove 115;

[0042] The sliding engagement between the slider 114 and the open groove 115 prevents the telescopic cylinder 103 from rotating, ensuring that the telescopic cylinder 103 moves up and down under the action of the threaded engagement with the screw 104.

[0043] Furthermore, the pre-compression mechanism includes a pre-compression cylinder 201 fixed to the pressurizing cylinder 1, a piston 202 slidably connected to the inner side of the pre-compression cylinder 201, and a connecting flow channel 203 communicating with the connecting hole 11 is opened at the lower end of the pre-compression cylinder 201.

[0044] The pre-pressing mechanism first applies a small pressure to piston 25. Piston 25 applies a small pressure to cutter barrel 7 through pressure rod 26 and universal connection mechanism. The purpose is to make cutter barrel 7 move downward first, so that its lower end is fully in contact with the upper end of the main shaft. This makes it easier for the pressure distribution mechanism to apply downward pressure evenly to the upper end of cutter barrel 7, thus facilitating the vertical transmission of pressure to the upper end of cutter barrel 7.

[0045] Furthermore, an exhaust port 12 is provided on the lower side of the booster cylinder 1 located on the side wall, and an exhaust flow channel 13 is provided on the lower side of the oil cylinder 2 located on the side wall.

[0046] The lower inner end of the booster cylinder 1 is connected to the outside through the exhaust port 12, and the lower inner end of the oil cylinder 2 is connected to the outside through the exhaust channel 13, ensuring that piston 1 3 and piston 2 5 can move stably up and down.

[0047] Furthermore, it also includes an air circuit system that sequentially injects compressed air into the pre-compression cylinder 201, the sealing shell 101, and the booster cylinder 1. The air circuit system includes an air tank 301, an air pipe 2 306 connected to the upper end of the pre-compression cylinder 201, an air pipe 307 connected to one side of the sealing shell 101, and an air pipe 1 305 connected to the upper end of the booster cylinder 1. Each of the air pipes 1 305, 2 306, and 3 307 is equipped with an electromagnetic reversing valve 304. Each of the air pipes 1 305, 2 306, and 3 307 is connected to the inside of the air tank 301 through a diverter pipe 303. All three electromagnetic reversing valves 304 are two-position three-way electromagnetic reversing valves. It also includes an air pump 302 that inflates the inside of the air tank 301 to maintain air pressure.

[0048] The air circuit system is used to inject compressed air into the pre-compression cylinder 201, the sealing shell 101, and the inner side of the booster cylinder 1, thereby controlling the pre-compression mechanism, the piston pushing mechanism, and the cutter cylinder to start in sequence according to the working order.

[0049] Working principle: During use, the mounting plate 401 is fixed to the upper end of the milling machine spindle by multiple mounting studs 402, so that the whole equipment can be fixed to the upper end of the milling machine spindle. When it is necessary to remove and disassemble the milling cutter inside the milling machine spindle, the cutter holder 7 needs to be moved downward, so that the lower edge of the cutter holder 7 presses against the upper end of the spindle, applying pressure to the spindle, forcing the disc spring inside the cutter clamping device to deform, releasing the clamping of the cutter, and thus the cutter can be removed and disassembled from the inner hole of the spindle.

[0050] In specific operation, firstly, the solenoid directional valve 304 connected to air pipe 306 in the air circuit system is activated, causing the valve core inside the solenoid directional valve 304 to switch positions. Because the air pump 302 pressurizes air into the air tank 301, a constant air pressure is maintained inside the air tank 301. The compressed air inside the air tank 301 enters the inside of air pipe 306 through the solenoid directional valve 304, and then enters the inside of the pre-compression cylinder 201 of the pre-compression mechanism. The piston 202 is pushed downward along the inner side of the pre-compression cylinder 201. Since the lower inner end of the pre-compression cylinder 201, the upper inner end of the oil cylinder 2, and the inner sides of the connecting channel 203 and the connecting hole 11 are all filled with hydraulic oil, it should be noted that when the piston 3 and the pressure rod 4 are at their highest points, the lower end of the pressure rod 4 only blocks the upper end of the connecting hole 11 from the inner side of the booster cylinder 1, and does not block one end of the connecting channel 203 from the connecting hole 11. (e.g.) Figure 4 (As shown in the diagram), when piston 3 202 moves downward, the hydraulic oil at the lower end of the pre-pressurized air cylinder 201 can be forced into the upper end of the inner side of the oil cylinder 2 through the connecting flow channel 203 and the connecting hole 11, thereby pushing piston 2 5 to move towards the lower end of the oil cylinder 2. Piston 2 5 drives the lower end pressure rod 2 6 to move downward, and pressure rod 2 6 drives the upper universal joint 8, intermediate rod 10, and lower universal joint 9 of the universal joint mechanism to move downward, thereby driving the tool holder 7 to move downward. If the lower end face of the tool holder 7 is completely parallel to the upper end face of the spindle, then the lower end face of the tool holder 7 can fully fit with the upper end face of the spindle. At this time, neither the upper universal joint 8 nor the lower universal joint 9 rotates. If the tool holder 7 tilts slightly, then the lower end face of the tool holder 7 cannot simultaneously fit with the upper end face of the spindle. The contact causes uneven force on the lower end of the tool holder 7. Under the reaction force of the spindle on the tool holder 7, the angle of the tool holder 7 will rotate slightly until the lower end of the tool holder 7 is completely in contact with the upper end face of the spindle. At this time, the upper universal joint 8 and the lower universal joint 9 will rotate, which will cause the angle of the intermediate rod 10 to rotate as well. Therefore, through the action of the universal joint mechanism, the relative position and relative angle between the tool holder 7 and the pressure rod 6 can be changed, so that the lower end face of the tool holder 7 can automatically keep parallel to the upper end face of the spindle, so that the lower end face of the tool holder 7 is completely in contact with the upper end face of the spindle. This makes it easier to evenly transmit the pressure of the tool holder 7 to all positions on the upper end face of the spindle, and prevent the pressure from concentrating in a local position on the upper end face of the spindle and deforming it.

[0051] Because the pressure applied to piston 25 by the air pressure inside the pre-compression cylinder 201 is insufficient to deform the disc spring, when piston 3202 stops moving downwards, the electromagnetic reversing valve 304 on the control air pipe 307 is activated, thereby switching the valve core position of the electromagnetic reversing valve 304. At this time, the compressed air inside the air tank 301 can enter the sealing shell 101 of the pressure dividing mechanism through the air pipe 307, causing the air pressure inside the sealing shell 101 to increase. Since the other end of the piston cylinder 107 of the multiple piston pushing mechanisms is connected to the outside atmosphere through the connecting air pipe 112, When the air pressure inside the sealing shell 101 increases, air enters through the openings at one end of the multiple piston cylinders 107, thereby pushing the piston plate 108 to move. The multiple piston plates 108 respectively drive the multiple piston rods 109 to move and extend outward from the piston cylinders 107, simultaneously compressing the spring 116. The multiple piston rods 109 respectively drive the multiple racks 105 to move. Under the sliding cooperation of the fixed block 111 and the guide groove 110, the piston rods 109 can drive the racks 105 to move linearly. When the multiple racks 105 move linearly, they drive the multiple gears 10 through tooth meshing. When the screws 104 of the pressure-dividing mechanism rotate, the multiple gears 106 drive the multiple screws 104 of the pressure-dividing mechanism to rotate. The rotation of the multiple screws 104 drives the multiple telescopic cylinders 103 to move downward along the inner side of the outer cylinder 102 via threads. It should be noted that the lower ends of the multiple telescopic cylinders 103 are all a certain distance away from the upper end of the tool-removing barrel 7. When the multiple telescopic cylinders 103 move downward, the lower ends of the multiple telescopic cylinders 103 successively contact and abut against the upper end of the tool-removing barrel 7. Since the screws 104 and the telescopic cylinders 103 are connected by threads, the extension length of the telescopic cylinders 103 can be self-locked through the threads. This allows the lower end of the telescopic cylinder 103 to press against the upper end of the tool-cutting barrel 7. At this time, the pressure rod 6 can transmit the pressure through the sealing shell 101 to multiple outer cylinders 102, through multiple outer cylinders 102 to multiple telescopic cylinders 103, and through multiple telescopic cylinders 103 to the tool-cutting barrel 7. This makes the pressure at the upper edge of the tool-cutting barrel 7 more uniform, so that the vertical downward pressure applied by the tool-cutting barrel 7 can be more evenly distributed on the upper end of the main shaft. The tool-cutting barrel 7 can apply vertical pressure to the main shaft, thereby preventing the main shaft from being subjected to lateral force and preventing lateral compression of the main shaft.

[0052] Finally, the solenoid directional valve 304 on the control air pipe 305 is activated. The valve core inside the solenoid directional valve 304 switches positions, thereby introducing the compressed air inside the air tank 301 through the air pipe 305 to the upper inner side of the booster cylinder 1, pushing the piston 3 downward. The piston 3 drives the pressure rod 4 to move into the inner side of the oil cylinder 2 through the connecting hole 11. When the piston 3 and the pressure rod 4 are at their highest points, the lower end of the pressure rod 4 only blocks the upper end of the connecting hole 11 from the inner side of the booster cylinder 1, and does not block one end of the connecting channel 203 from the connecting hole 11. (e.g.) Figure 4As shown in the diagram, when the pressure rod 4 moves down through the connecting hole 11 and enters the inner side of the oil cylinder 2, the pressure rod 4 will squeeze the hydraulic oil at the upper end of the inner side of the oil cylinder 2. According to Pascal's principle, the pressure of the hydraulic oil acting on the surface of the piston 5 is equal to the pressure of the hydraulic oil acting on the end face of the pressure rod 4, which is equal to the ratio of the surface area of ​​the piston 5 to the end face surface area of ​​the pressure rod 4. Since the surface area of ​​the piston 5 is larger than the end face surface area of ​​the pressure rod 4, the pressure of the hydraulic oil on the piston 5 is greater, which in turn transmits greater pressure to the pressure rod 6 and the cutter barrel 7. The cutter barrel 7 can apply greater pressure to the upper end of the spindle, thereby compressing the disc spring and releasing the milling cutter.

[0053] After the milling cutter is ejected, the three solenoid directional valves 304 are reset, blocking the continued release of compressed air from the air tank 301. At this time, air pipes 305, 306, and 307 are connected to the outside through the exhaust ports of the solenoid directional valves 304. Spring 14 releases its elastic force, causing piston 3 to move upward and reset, allowing the air at the upper end of the inner side of the booster cylinder 1 to be discharged to the outside through air pipes 305 and the exhaust ports of the solenoid directional valves 304 on air pipe 305. At the same time, spring 15 releases its elastic force, pushing piston 5 upward. Piston 5 drives pressure rod 6 and the cutter barrel 7 upward, causing the lower end of the cutter barrel 7 to separate from the upper end of the spindle. When piston 25 moves upward, it pushes the hydraulic oil at the upper end of the inner side of the oil cylinder 2 back to the inner side of the pre-pressurized air cylinder 201 through the connecting flow channel 203. The lower end pushes the piston 3 202 upward, forcing the air at the upper end of the pre-compressed air cylinder 201 into the air pipe 2 306, and then discharging it to the outside through the exhaust port of the electromagnetic reversing valve 304 on the air pipe 2 306. The spring 3 116 in the multiple piston pushing mechanism releases its elastic force to push the piston plate 108 and piston rod 109 to move in opposite directions, pushing the air inside the sealing shell 101 back to the air pipe 3 307, and then discharging it to the outside through the exhaust port of the electromagnetic reversing valve 304 on the air pipe 3 307. Since the piston plate 108 and piston rod 109 move in opposite directions, they can drive the rack 105 to move in opposite directions, thereby driving the gear 106 to rotate in opposite directions, thereby driving the multiple telescopic cylinders 103 to move upward, so that the lower end of the multiple telescopic cylinders 103 separates from the upper end of the knife barrel 7.

[0054] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A knife-cutting device based on a knife-cutting barrel, comprising a booster air cylinder and an oil cylinder, wherein a piston one and a piston two are slidably connected to the inner sides of the booster air cylinder and the oil cylinder respectively, a connecting hole is provided at the lower end of the booster air cylinder, a pressure rod one penetrating the inner side of the connecting hole is fixed at the lower end of the piston one, and a pressure rod two extending to the outer side of the oil cylinder is fixed at the lower end of the piston two, characterized in that, The lower end of the pressure rod two is connected to the knife barrel through a universal joint mechanism, and a pressure-dividing mechanism is fixed on the outside of the pressure rod two. The universal joint mechanism includes an upper universal joint fixed to the lower end of the pressure rod and a lower universal joint fixed to the upper end of the cutter barrel, with an intermediate rod connecting the upper universal joint and the lower universal joint. The pressure dividing mechanism includes a sealing shell fixed to the outside of the pressure rod, multiple racks slidably arranged on the inner side of the sealing shell, multiple outer cylinders fixed on the lower side of the sealing shell, telescopic cylinders slidably inserted at the lower ends of the multiple outer cylinders, screws threadedly connected to the inner sides of the multiple telescopic cylinders, the upper end of each screw rotatably connected to the inner side of the sealing shell, and a gear meshing with the racks fixed at the upper end of each screw. It also includes multiple piston pushing mechanisms that drive the multiple racks to move. It also includes a pre-pressurization mechanism that injects hydraulic oil into the inside of the oil cylinder in advance; The piston pushing mechanism includes a piston cylinder fixed inside the sealing shell, a piston plate slidably connected to the inner side of the piston cylinder, a piston rod extending to the outer side of the piston cylinder fixed to one end of the piston plate, one end of the piston rod fixedly connected to one end of the rack, and a spring sleeved on the outer side of the piston rod connected to one end of the piston plate. One end of the piston cylinder is connected to the inside of the sealing shell through an opening, and the other end of the piston cylinder is connected to a connecting air pipe extending to the outside of the sealing shell.

2. The knife-making device based on a knife-making barrel according to claim 1, characterized in that: Each rack has a guide groove inside, and a fixing block is fixed on the inner side of the sealing shell at the position corresponding to each rack. Each fixing block is slidably connected to the inner side of the guide groove at the corresponding position.

3. The knife-cutting device based on a knife-cutting barrel according to claim 1, characterized in that: Each telescopic cylinder is fitted with a sealing ring on its outer side, and the sealing ring slides and adapts to the inner side of the outer cylinder.

4. The knife-cutting device based on a knife-cutting barrel according to claim 1, characterized in that: The lower ends of multiple outer cylinders are provided with open slide grooves, and the outer sides of multiple telescopic cylinders are fixed with sliders that are slidably connected to the inner side of the open slide grooves.

5. The knife-making device based on a knife-making barrel according to claim 1, characterized in that: The pre-compression mechanism includes a pre-compression cylinder fixed to the pressurizing cylinder, a piston three slidably connected to the inner side of the pre-compression cylinder, and a connecting flow channel communicating with a connecting hole at the lower end of the pre-compression cylinder.

6. The knife-making device based on a knife-making barrel according to claim 1, characterized in that: A spring is connected between the lower end of piston one and the lower inner end of the booster cylinder, and a spring is connected between the lower end of piston two and the lower inner end of the oil cylinder.

7. The knife-making device based on a knife-making barrel according to claim 1, characterized in that: The lower side of the booster cylinder has an exhaust port located on the side wall, and the lower side of the oil cylinder has an exhaust channel located on the side wall.

8. The knife-making device based on a knife-making barrel according to claim 1, characterized in that: The lower end of the oil cylinder is fixed with a mounting plate, and multiple mounting studs are installed through the inside of the mounting plate. The pressure rod movably passes through the inside of the mounting plate.

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