A high-speed precision pneumatic punch

Abstract

This invention discloses a high-speed precision pneumatic punch press, relating to the technical field of metal stamping equipment. Existing pneumatic punch presses suffer from slow stamping speeds and insufficient precision. This pneumatic punch press includes a die assembly, a pneumatic mechanism that provides power to the punch press, and a stamping mechanism that drives the upper die to move linearly up and down. The stamping mechanism is connected to the pneumatic mechanism via a transmission component. The stamping mechanism includes a piston plate that moves linearly up and down with the crankshaft, at least two sliders that move synchronously in opposite directions or in opposite directions to the left and right with the linear up and down movement of the piston plate, and a stamping block that moves linearly up and down with the linear up and down movement of the at least two sliders. This pneumatic punch press offers high stamping speed and high precision.

Description

Technical Field

[0001] The invention relates to the technical field of equipment for stamping metal, and in particular to a high-speed precision pneumatic punching machine. Background Art

[0002] Punching machines can punch metal sheets into shape and are widely used in many fields. According to the power source, they can be divided into mechanical punching machines, hydraulic punching machines, and pneumatic punching machines. Pneumatic punching machines use air sources to generate compressed gas and convert the pressure into impact force through pneumatic mechanisms to punch metal into shape.

[0003] Existing pneumatic punch presses mostly use cylinders as pneumatic mechanisms. The punching force is low and the lower surface of the punch block is not parallel to the upper surface of the work table, resulting in low precision of the pneumatic punch press. At the same time, the cylinder works one stroke at a time. One stroke includes four processes: air intake, downward pressure, air release, and rise. Obviously, this working method has a stop time, which makes the punching speed of the pneumatic punch press slower.

[0004] Therefore, the existing pneumatic punching machine has the problem of slow punching speed and insufficient precision during punching. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a high-speed precision pneumatic punching machine with higher punching speed and higher precision.

[0006] The technical solution adopted to solve the above technical problem is: a high-speed precision pneumatic punch provided by the present invention includes a mold assembly, and the mold assembly includes a matching upper mold and a lower mold;

[0007] It also includes a pneumatic mechanism that provides power for the punch press and a stamping mechanism that can drive the upper die to move up and down in a straight line, and the stamping mechanism is connected to the pneumatic mechanism through a transmission member;

[0008] The pneumatic mechanism includes a pneumatic motor and an air supply assembly for supplying air to the pneumatic motor;

[0009] The transmission member comprises a power shaft which is transmission-connected to the pneumatic motor, and a crankshaft is installed at one end of the power shaft away from the pneumatic motor;

[0010] The stamping mechanism comprises a piston plate capable of linearly moving up and down with the rotation of the crankshaft, at least two sliders capable of synchronously linearly moving toward or away from each other and left and right with the linearly moving up and down of the piston plate, and a stamping block capable of linearly moving up and down with the linearly moving of the at least two sliders toward or away from each other, a horizontally arranged upper die loading plate for mounting an upper die is installed at the bottom of the stamping block, and upper die loading plate slide rails for the upper die loading plate to slide up and down and at least two guide rods capable of limiting the sliding direction of the upper die loading plate are symmetrically arranged on the left and right sides of the upper die loading plate;

[0011] The bottom of each of the sliding blocks is fixedly connected to two parallel connecting rails that are symmetrically arranged front and back, and the connecting rails include an inclined section and a vertical section;

[0012] The punching block is a triangular prism structure or a triangular prism structure with three corners cut off, and the punching block includes a lower side parallel to the upper die loading plate and two inclined side surfaces, and the two inclined side surfaces are respectively slidably connected to the inclined section on the same side;

[0013] At least five pressing rollers are vertically mounted on the two inclined side surfaces respectively, and the rollers of the pressing rollers are located in the inclined sections.

[0014] As a further improvement of the present invention, the gas supply assembly includes a gas storage tank capable of providing gas, the gas storage tank is connected to the pneumatic motor through a pipeline, and the pipeline is provided with an air valve and a pull rod for controlling the air inlet or outlet of the air valve.

[0015] As a further improvement of the present invention, the air valve includes an outer shell and a piston slidably installed in the outer shell and connected to the pull rod. The end of the piston close to the pull rod is connected to the inner wall of the outer shell close to the pull rod through a return spring. An outlet is provided on the side wall of the outer shell away from the pull rod, and the outlet is connected to the pipeline. An inlet is provided at the bottom of the outer shell, and the inlet is connected to the gas tank.

[0016] As a further improvement of the present invention, the pneumatic motor is a vane-type pneumatic motor.

[0017] As a further improvement of the present invention, the pneumatic motor includes a central rotating shaft, a small pulley is installed on the front end of the central rotating shaft, a large pulley is arranged above the small pulley, the small pulley is connected to the large pulley by a belt drive, and a power shaft is installed at the central axis of the large pulley.

[0018] As a further improvement of the present invention, the end of the crankshaft away from the power shaft is connected to a rotating shaft, and the end of the rotating shaft away from the crankshaft is equipped with a pointer and an indicator plate matching the pointer that can display whether the punching block is in an ascending or descending state.

[0019] As a further improvement of the present invention, the bottom of the piston plate is hinged to one end of two first connecting rods, and the other ends of the two first connecting rods away from the piston plate are hinged to the crankshaft.

[0020] As a further improvement of the present invention, the left and right sides of the piston plate are respectively hinged to one end of the second connecting rod, and the other ends of the two second connecting rods away from the piston plate are respectively hinged to the sliders on the same side.

[0021] As a further improvement of the present invention, a toggle member capable of toggling the metal plate to be processed is hingedly connected to the rear side of the upper die.

[0022] As a further improvement of the present invention, the lower mold is installed on the top of the lower mold loading plate, and a discharge port for allowing waste to fall is opened on the lower mold loading plate. A guide plate is inclined at the bottom of the lower mold loading plate to guide the waste falling from the discharge port.

[0023] The beneficial effects of the present invention are as follows: the high-speed precision pneumatic punch provided by the present invention has a high punching speed and is relatively precise. First, the pneumatic punch is driven by an air motor, and the crankshaft connecting rod mechanism drives the punching block to rise and fall. Therefore, as long as the air intake of the air motor is maintained, the punching block can be continuously raised and lowered without waiting time, which greatly improves the punching speed. At the same time, the pneumatic punch is provided with at least two slide rails for sliding the upper die loading plate installed at the bottom of the punching block and at least two guide rods for limiting the sliding direction of the upper die loading plate, so that it can be ensured that the upper die loading plate is always in contact with the lower die. The plane where the bottom surface of the punch block remains parallel, and will not deviate significantly due to the force during the stamping process. Therefore, the falling position is more accurate, which improves the precision. At the same time, the punch block of the pneumatic punch has a special shape, which is a triangular prism structure or a triangular prism structure with three corners cut off. The clamping rollers on the two oblique sides of the punch block will rotate with the left and right sliding of the slider, pressing the two oblique sides of the punch block, so that the force on the lower side of the punch block is concentrated and uniform, ensuring the punching force while also ensuring that the upper die loading plate is always parallel to the plane where the bottom surface of the lower die is located. Therefore, the pneumatic punch is more precise. 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 the front view of the present invention.

[0026] Figure 3 It is a schematic diagram of the assembly of the pneumatic mechanism and some transmission parts of the present invention.

[0027] Figure 4 It is a schematic diagram of the overall structure of the pneumatic mechanism of the present invention without the pneumatic motor housing.

[0028] Figure 5 It is a perspective schematic diagram of the overall structure of the gas valve in the present invention.

[0029] Figure 6 It is a schematic diagram of the assembly of the pneumatic motor and the transmission member in the present invention.

[0030] Figure 7 It is a schematic diagram of the overall structure of the crankshaft in the present invention.

[0031] Figure 8 It is an assembly diagram of the transmission part, the stamping mechanism and the die assembly in the present invention.

[0032] Fig. 9 It is a schematic diagram of the overall structure of the punching mechanism bracket in the present invention.

[0033] Fig.10 It is a partial structural schematic diagram of the transmission part and the stamping structure in the present invention.

[0034] Fig.11 It is a schematic diagram of the overall structure of the L-shaped track in the present invention.

[0035] Fig.12 It is a schematic diagram of the overall structure of the pressing roller in the present invention.

[0036] Fig.13 It is a schematic diagram of the overall structure of the mold assembly in the present invention.

[0037] Fig.14 It is a schematic diagram of the overall structure of the mold assembly from another angle in the present invention.

[0038] Fig.15 It is a schematic diagram of the overall structure of the lower mold loading plate in the present invention.

[0039] Fig.16 It is a partial structural schematic diagram of the present invention.

[0040] The names of the components corresponding to the marks in the above drawings are: 1. pneumatic mechanism; 101. gas storage tank; 1011. air inlet; 1012. air outlet; 1013. gas storage tank mounting frame; 102. tie rod; 103. air valve; 104. pipeline; 105. pneumatic motor; 1051. stator; 1052. air supply port; 1053. rotor; 1054. blade; 1055. primary exhaust port; 1056. central rotating shaft; 106. pneumatic motor mounting frame; 1061. secondary exhaust port;

[0041] 11. Return spring; 12. Piston; 13. Inlet; 14. Outlet; 15. Housing;

[0042] 2. Transmission parts; 201. Small pulley; 202. Belt; 203. Large pulley; 204. Power shaft; 205. Rotating shaft; 206. Crankshaft; 207. Pointer; 208. Indicator plate;

[0043] 3. Stamping mechanism; 301. Stamping mechanism bracket; 302. First connecting rod; 303. Piston plate; 3031. Second connecting rod connecting block; 304. First sliding rod; 305. Sliding rod support seat; 306. Second connecting rod; 307. Sliding block; 308. Second sliding rod; 309. Connecting slide rail; 3010. Pressing roller; 3011. Stamping block; 3012. Upper die loading plate;

[0044] 31. Upper die loading plate slide rail; 32. Upper die loading plate slider; 33. Guide rod; 34. Guide rod support seat;

[0045] 4. Mold assembly; 401. upper mold; 4011. toggle member; 402. lower mold; 403. lower mold loading plate; 4031. material discharge port; 404. material guide plate;

[0046] 5. Support base; 6. Sealing plate. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and beneficial effects of the present invention more clearly understood, the present invention is further described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0048] The preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0049] like Figure 1 , Figure 2 , Fig.13 , Fig.14 , Fig.15 , Fig.16 As shown, a high-speed precision pneumatic punch provided by the present invention includes a support base 5, the support base 5 includes two parallel support plates and a horizontal plate fixedly installed on the two support plates, a work table is fixedly installed on the top of the support base 5, the work table includes a lower die loading plate 403 and at least four support legs arranged at the bottom of the lower die loading plate 403 for supporting the lower die loading plate 403, and at least four support legs are installed on the horizontal plate.

[0050] The high-speed precision pneumatic punching machine also includes a mold assembly 4, which includes a matching upper mold 401 and a lower mold 402. The lower bottom surface of the upper mold 401 has eleven protrusions. The lower mold 402 is provided with eleven through holes that match the shape, size and number of the protrusions. The rear side of the upper mold 401 is hinged with a toggle piece 4011 that can toggle the metal to be processed. The toggle piece 4011 rotates downward with the rise of the upper mold 401 and rotates upward with the descent of the upper mold 401. The toggle piece 4011 is a strip plate. The left and right sides of the top of the strip plate are respectively provided with small connecting blocks. The two small connecting blocks are respectively hinged to the left and right sides of the upper mold 401 through connecting rods. The lower die 402 is mounted on the top of the lower die loading plate 403, and a material discharge port 4031 is provided on the lower die loading plate 403 to allow waste to fall down. A material guide plate 404 is obliquely provided at the bottom of the lower die loading plate 403 to guide the waste falling from the material discharge port 4031. The high-speed precision pneumatic punching machine also includes a pneumatic mechanism 1 that provides power for the punching machine and a punching mechanism 3 that can drive the upper die 401 to move linearly up and down, and the punching mechanism 3 is connected to the pneumatic mechanism 1 through a transmission member 2.

[0051] like Figure 3 , Figure 4 , Figure 5 As shown, the pneumatic mechanism 1 includes a pneumatic motor 105 and a gas supply assembly for supplying gas to the pneumatic motor 105. The gas supply assembly includes a gas tank 101 capable of providing gas, and the gas tank 101 is installed in the support base 5 through a gas tank mounting frame 1013. An air inlet 1011 is provided on the right side of the gas tank 101, and an air outlet 1012 is provided on the top of the gas tank 101. The air outlet 1012 of the gas tank 101 is connected to the pneumatic motor 105 through a pipeline 104, and an air valve 103 and a pull rod 102 for controlling the air inlet or outlet of the air valve 103 are provided on the pipeline 104. The air valve 103 is arranged on the top of the gas tank mounting frame 1013, and a notch for installing the air valve 103 is provided on the horizontal plate of the support base 5. The air valve 103 includes a housing 15 and a piston 12 slidably mounted in the housing 15 and connected to the pull rod 102. The end of the piston 12 close to the pull rod 102 is connected to the inner wall of the housing 15 close to the pull rod 102 through a return spring 11. An outlet 14 is provided on the side wall of the housing 15 away from the pull rod 102, and the outlet 14 is connected to the pipeline 104. An inlet 13 is provided at the bottom of the housing 15, and the inlet 13 is connected to the gas storage tank 101. Pulling the pull rod 102 manually or by a mechanical arm can realize the air intake and exhaust of the pneumatic motor 105, and the pull rod 102 acts as a mechanical switch.

[0052] The pneumatic motor 105 is installed on the rear side of the top of the work surface through the pneumatic motor mounting frame 106. A sealing plate 6 is installed on the outside of the pneumatic motor mounting frame 106. The pneumatic motor 105 is a vane-type pneumatic motor, including a stator 1051 fixedly installed in the pneumatic motor mounting frame 106 and a rotor 1053 rotatably arranged in the stator 1051. A plurality of blades 1054 are installed on the rotor 1053. An air supply port 1052 connected to an end of the supply pipe 104 away from the air valve 103 is opened on the upper right side of the stator 1051, a primary exhaust port 1055 is opened on the upper left side of the stator 1051, and a secondary exhaust port 1061 capable of discharging the gas discharged from the primary exhaust port 1055 into the air is opened on the top of the pneumatic motor mounting frame 106. When the pneumatic motor 105 takes in air, the blades 1054 on the rotor 1053 are blown downward, and the rotor 1053 rotates counterclockwise. The gas is discharged after reaching the primary exhaust port 1055 and is discharged into the air through the secondary exhaust port 1061.

[0053] The pneumatic motor 105 includes a central rotating shaft 1056, which is installed at the central axis of the rotor 1053. A small pulley 201 is installed on the front end of the central rotating shaft 1056, and a large pulley 203 is arranged above the small pulley 201. The small pulley 201 and the large pulley 203 are connected by a belt 202. The setting that the small pulley 201 drives the large pulley 203 to rotate can realize the deceleration rotation of the large pulley 203.

[0054] like Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 As shown, the transmission member 2 includes a power shaft 204 that is transmission-connected to the pneumatic motor 105, and the power shaft 204 is installed at the central axis of the large pulley 203. A crankshaft 206 is installed at one end of the power shaft 204 away from the pneumatic motor 105; a rotating shaft 205 is connected to one end of the crankshaft 206 away from the power shaft 204, and a pointer 207 and an indicator plate 208 that matches the pointer 207 and can display whether the punch block 3011 is in an ascending or descending state are installed at one end of the rotating shaft 205 away from the crankshaft 206, and the word "ascending" is written on the upper side of the indicator plate 208, and the word "descending" is written on the lower side.

[0055] The stamping mechanism 3 includes a piston plate 303 capable of linearly moving up and down as the crankshaft 206 rotates, at least two sliders 307 capable of linearly moving toward or away from each other and left and right synchronously as the piston plate 303 moves up and down, and a stamping block 3011 capable of linearly moving up and down as the at least two sliders 307 move toward or away from each other, a horizontally arranged upper die loading plate 3012 for mounting an upper die is installed at the bottom of the stamping block 3011, upper die loading plate slide rails 31 for the upper die loading plate 3012 to slide up and down and at least two guide rods 33 capable of limiting the sliding direction of the upper die loading plate 3012 are symmetrically arranged on the left and right sides of the upper die loading plate 3012, at least two guide rods 33 are fixedly installed on the top of the worktable through guide rod support seats 34, and upper die loading plate sliders 32 whose shape and size match the upper die loading plate slide rails 31 are fixedly installed on the left and right sides of the upper die loading plate 3012. A top plate is provided on the top of the pneumatic motor mounting frame 106 and the guide rod 33, and a large opening is provided on the top plate for the punching mechanism 3 to pass through.

[0056] A connecting block is provided at the bottom of the piston plate 303, and the piston plate 303 is hinged to one end of the two first connecting rods 302 through the connecting block, and the other ends of the two first connecting rods 302 away from the piston plate 303 are hinged to the crankshaft 206. The front and rear ends of the piston plate 303 are sleeved on the first sliding rod 304, and the first sliding rod 304 is respectively installed on the sliding rod support seat 305, and the sliding rod support seat 305 is installed on the top plate. The sliding rod support seat 305 is a cylindrical structure, and the left and right sides of the sliding rod support seat 305 are both provided with a triangular structural reinforcement plate connected to the top plate.

[0057] The left and right sides of the piston plate 303 are respectively provided with second connecting rod connection blocks 3031, and the piston plate 303 is respectively hinged to one end of two second connecting rods 306 through the two second connecting rod connection blocks 3031, and the other ends of the two second connecting rods 306 away from the piston plate 303 are respectively hinged to the sliders 307 on the same side. A stamping mechanism bracket 301 is fixedly installed on the top plate, and at least one second sliding rod 308 capable of allowing the slider 307 to slide linearly left and right is installed between the left and right side walls of the stamping mechanism bracket 301. The front and rear side plates of the stamping mechanism bracket 301 are arched structures, and a hole for the power shaft 204 to pass through is opened on the rear side plate, and a hole for the rotating shaft 205 to pass through is opened on the front side plate.

[0058] The power shaft 204 passes through the slide support seat 305 located on the rear side, the rear side plate and is connected to the crankshaft 206, the rotating shaft 205 passes through the front side plate, the slide support seat 305 located on the front side and is connected to the pointer 207, and the indicator plate 208 is fixedly installed on the front side surface of the slide support seat 305 located on the front side.

[0059] The bottom of each slider 307 is fixedly connected to two parallel connecting rails 309 that are symmetrically arranged front and back. The connecting rails 309 include an inclined section and a vertical section. The connecting rails 309 are fixedly installed on the bottom of the slider 307 through the vertical section. The angle between the inclined section and the horizontal plane is 45°. The stamping block 3011 is a triangular prism structure or a triangular prism structure with three corners cut off. The cross-section of the stamping block 3011 is an isosceles right triangle structure or an isosceles right triangle structure with three corners cut off. The stamping block 3011 is hollowed out with a plurality of holes for reducing weight, which can enable it to maintain a strong structure without being too heavy. The stamping block 3011 includes a lower side surface parallel to the upper die loading plate 3012 and two inclined side surfaces, and the two inclined side surfaces are respectively slidably connected to the inclined sections on the same side; at least five clamping rollers 3010 are vertically installed on the two inclined side surfaces, and the rollers of the clamping rollers 3010 are located in the inclined sections. Rolling plates for the rollers to slide are arranged at the bottom of the opposite surfaces of the inclined sections of the two parallel and front-to-back symmetrically arranged connecting slide rails 309, and the rolling plates are parallel to and in contact with the inclined side surfaces. The clamping rollers 3010 are fixedly installed on the inclined side surfaces, and the rollers roll on the rolling plates tightly pressing against the rolling plates, so that the connecting slide rails 309 can slide on the inclined side surfaces.

[0060] The working principle of the present invention is as follows: initially, the upper die 402 is located at the top, and the metal sheet can be placed flat on the lower die 402 manually or by a mechanical arm, and gas is injected into the gas storage tank 101 through the air inlet 1011 and stored, and the gas enters the gas valve 103 through the pipe 104 through the air outlet 1012, and the pull rod 102 is pulled forward, and the piston 12 slides forward in the housing 15, and the inlet 13 loses the shielding of the piston 12, and the gas flows in from the inlet 13, and flows into the pipe 104 from the outlet 14, and then enters the pneumatic motor 10 through the air supply port 1052. 5, the blades 1054 are blown downward, driving the rotor 1053 to rotate counterclockwise when viewed from the rear side, thereby driving the central shaft 1056 to rotate counterclockwise when viewed from the rear side, and the central shaft 1056 drives the small pulley 201 to rotate faster, and then the small pulley 201 drives the large pulley 203 to rotate slower through the belt 202, thereby driving the power shaft 204 to rotate counterclockwise when viewed from the rear side, thereby driving the crankshaft 206 and the shaft 205 to rotate counterclockwise when viewed from the rear side, and clockwise when viewed from the front side, and as the crankshaft 206 rotates clockwise, the shaft 205 drives the pointer 2 07 rotates clockwise, pointing to the word "down" on the indicator plate 208. At this time, the first connecting rod 302 will drive the piston plate 303 to slide upward along the first connecting rod 302 and rise. The piston plate 303 drives the two second connecting rods 306 to move, so that the two sliders 307 slide synchronously toward each other along the second sliding rod 308, driving the connecting rails 309 at the bottom of the two sliders 307 to approach, and the clamping roller 3010 rotates in the two connecting rails 309 symmetrically arranged in the front and rear, squeezing the connecting rails 309, and squeezing the stamping block 3011 downward. Based on the triangle stability principle , so that the force is concentrated on the lower side of the punching block 3011, thereby increasing the punching force of the punching block 3011. The punching block 3011 drives the upper die loading plate slider 32 of the upper die loading plate 3012 to slide downward in the upper die loading plate slide rail 31, and the upper die loading plate 3012 slides downward on the four guide rods 33 to ensure that the upper die loading plate 3012 and the upper surface of the work table are always parallel. When the two sliders 307 are in contact, at least four clamping rollers 3010 in a pair of parallel and front-to-back symmetrically arranged connecting slide rails 309 clamp the connecting slide rails 309 and the punching block 3011.The upper die loading plate 3012 drives the upper die 401 to descend and cooperates with the lower die 402 to stamp the metal sheet. The fallen waste falls from the discharge port 4031 and falls to the ground or a specially prepared collection tank under the guidance of the guide plate 404. The pull rod 102 is kept pulled forward, and the crankshaft 206 will further rotate clockwise. The shaft 205 drives the pointer 207 to point to the word "up" on the indicator plate 208. At this time, the first connecting rod 302 will drive the piston plate 303 to slide downward along the first connecting rod 302 and descend. The piston plate 303 drives the two second connecting rods 306 to move, so that the two sliders 307 move synchronously along the second slider 308. The upper die 401 moves upwards on the four guide rods 33, and the upper die 401 leaves the lower die 402, so that the next metal sheet to be processed can be placed in the upper die 401. After the processing is completed, the pull rod 102 is pushed back, the piston 12 blocks the inlet 13 and the outlet 14, the pipeline 104 no longer supplies air to the pneumatic motor 105, the pneumatic motor 105 stops rotating, the central shaft 1056 stops rotating, and a series of parts that cooperate with the central shaft 1056 stop working, and the machine stops. The entire machine tool is powered only by the pneumatic mechanism 1.

[0061] The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the concept of the present invention, some simple deductions, modifications or substitutions can be made.

Claims

1. A high-speed precision pneumatic punch, characterized in that: The mold assembly (4) comprises a matching upper mold (401) and a lower mold (402); It also includes a pneumatic mechanism (1) that provides power for the punch press, and a punching mechanism (3) that can drive the upper die (401) to move linearly up and down, wherein the punching mechanism (3) is connected to the pneumatic mechanism (1) through a transmission member (2); The pneumatic mechanism (1) comprises a pneumatic motor (105) and an air supply assembly for supplying air to the pneumatic motor (105); The transmission member (2) comprises a power shaft (204) which is transmission-connected to the pneumatic motor (105); a crankshaft (206) is mounted on one end of the power shaft (204) away from the pneumatic motor (105); The punching mechanism (3) comprises a piston plate (303) capable of linearly moving up and down as the crankshaft (206) rotates, at least two sliders (307) capable of synchronously linearly moving toward or away from each other or left and right as the piston plate (303) moves up and down, and a punching block (3011) capable of linearly moving up and down as the at least two sliders (307) move toward or away from each other, wherein a horizontally arranged upper die loading plate (3012) for mounting an upper die is installed at the bottom of the punching block (3011), and upper die loading plate slide rails (31) for the upper die loading plate (3012) to slide up and down and at least two guide rods (33) capable of limiting the sliding direction of the upper die loading plate (3012) are symmetrically arranged on the left and right sides of the upper die loading plate (3012); The bottom of each of the sliding blocks (307) is fixedly connected to two parallel connecting rails (309) arranged symmetrically in front and back, and the connecting rails (309) include an inclined section and a vertical section; The punching block (3011) is a triangular prism structure or a triangular prism structure with three corners cut off, and comprises a lower side surface parallel to the upper die loading plate (3012) and two inclined side surfaces, wherein the two inclined side surfaces are respectively slidably connected to the inclined section on the same side; At least five pressing rollers (3010) are respectively vertically mounted on the two inclined side surfaces, and the rollers of the pressing rollers (3010) are located in the inclined sections.

2. A high-speed precision pneumatic punching machine according to claim 1, characterized in that: The gas supply assembly comprises a gas storage tank (101) capable of providing gas, the gas storage tank (101) being connected to a pneumatic motor (105) via a pipeline (104), the pipeline (104) being provided with a gas valve (103) and a pull rod (102) for controlling the gas inlet or outlet of the gas valve (103).

3. A high-speed precision pneumatic punching machine according to claim 2, characterized in that: The gas valve (103) comprises a housing (15) and a piston (12) slidably mounted in the housing (15) and connected to the pull rod (102); one end of the piston (12) close to the pull rod (102) is connected to the inner wall of the housing (15) close to the pull rod (102) via a return spring (11); an outlet (14) is provided on the side wall of the housing (15) away from the pull rod (102); the outlet (14) is connected to the pipeline (104); an inlet (13) is provided at the bottom of the housing (15); the inlet (13) is connected to the gas storage tank (101).

4. A high-speed precision pneumatic punch according to any one of claims 1 to 3, characterized in that: The pneumatic motor (105) is a vane-type pneumatic motor.

5. A high-speed precision pneumatic punch according to any one of claims 1 to 3, characterized in that: The pneumatic motor (105) comprises a central rotating shaft (1056), a small pulley (201) is mounted on the front end of the central rotating shaft (1056), a large pulley (203) is arranged above the small pulley (201), the small pulley (201) and the large pulley (203) are connected to each other via a belt (202), and a power shaft (204) is mounted at the central axis of the large pulley (203).

6. A high-speed precision pneumatic punch according to any one of claims 1 to 3, characterized in that: One end of the crankshaft (206) away from the power shaft (204) is connected to a rotating shaft (205), and one end of the rotating shaft (205) away from the crankshaft (206) is installed with a pointer (207) and an indicator plate (208) matching the pointer (207) and capable of displaying whether the punching block (3011) is in an ascending or descending state.

7. A high-speed precision pneumatic punch according to any one of claims 1 to 3, characterized in that: The bottom of the piston plate (303) is hinged to one end of two first connecting rods (302), and the other ends of the two first connecting rods (302) away from the piston plate (303) are both hinged to the crankshaft (206).

8. A high-speed precision pneumatic punch according to any one of claims 1 to 3, characterized in that: The left and right sides of the piston plate (303) are respectively hinged to one end of the second connecting rod (306), and the other ends of the two second connecting rods (306) away from the piston plate (303) are respectively hinged to the sliders (307) on the same side.

9. A high-speed precision pneumatic punch according to any one of claims 1 to 3, characterized in that: A moving piece (4011) capable of moving the metal plate to be processed is hingedly connected to the rear side of the upper die (401).

10. A high-speed precision pneumatic punch according to any one of claims 1 to 3, characterized in that: The lower die (402) is mounted on the top of a lower die loading plate (403), a material discharge port (4031) is provided on the lower die loading plate (403) for allowing waste to fall, and a material guide plate (404) is obliquely arranged at the bottom of the lower die loading plate (403) for guiding waste falling from the material discharge port (4031).

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