A precision automated CNC punching machine

Abstract

The present invention belongs to the technical field of precision machine tools, and specifically is a precision automated CNC punching machine. Micro through holes are arranged inside a stamping die, and an air bag is arranged outside the stamping die. The micro through holes connect the inside of the air bag and the bottom of the stamping die. During the stamping process, the stroke and return stroke of the stamping die will compress the air bag. The air bag continuously deflates to form a thin air cushion layer at the bottom of the stamping die, which can effectively prevent the occurrence of material carrying in the die. An oil cavity is arranged inside the wall of a slide rail, and a one-way valve is arranged at the gap between the slide rail and an impact slider. The up and down movement of the impact slider is used to squeeze the lubricating oil that oozes out of the one-way valve to continuously provide lubrication for the movement of the lubricating impact slider. A fixed pressure rod is arranged to reduce the vibration of the plate during the stamping process, avoid the displacement of the plate, and improve the stamping accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of precision machine tools, in particular to a precision automatic numerically controlled punching machine. Background Art

[0002] A punch press is a stamping press that can perform blanking, punching, forming, drawing, trimming, fine blanking, shaping, riveting and extrusion, etc. through a mold. Compared with traditional mechanical processing methods, the stamping process has the advantages of saving materials, saving energy, and having low operating requirements for workers, and is widely used in various fields.

[0003] The existing large-scale precision CNC punching machines are represented by turret punching machines, which are high-precision and high-efficiency metal sheet punching and nibbling processing equipment. They use single punching, nibbling and nibbling methods to punch out holes and parts of various shapes and sizes. However, during the long processing process, the bottom of the stamping die will heat up after repeated impacts and have a certain viscosity. When the stamping frequency is fast, due to the fast rebound rate of the spring under the die, at the moment when the die rises after one stamping, a momentary vacuum will be formed between the bottom of the die and the sheet, and the material cut by the impact will be adsorbed on the bottom of the die; this problem of carrying material will not only affect the continuity of the stamping process and the processing efficiency, but may also cause damage to the die and the sheet in severe cases.

[0004] In view of this, in order to overcome the above technical problems, the present invention designs and develops a precision automated CNC punching machine to solve the above technical problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is: a precision automated CNC punching machine provided by the present invention can prevent the occurrence of sticking and carrying of materials during the stamping process, greatly improving the stability, reliability and safety of the punching machine operation, and can save the cleaning problem caused by mold carrying for long-term stamping work, thereby greatly improving work efficiency and saving precious working hours.

[0006] The present invention provides a precision automated CNC punching machine, comprising a bed, a turret is provided in the middle of the bed, and the turret is rotatably connected to the inner wall of the bed; a No. 1 bevel gear is provided at the upper end of the turret, the No. 1 bevel gear is meshed with the No. 2 bevel gear, the center of the No. 2 bevel gear is fixedly connected to one end of the No. 1 motor output shaft, the No. 1 motor is fixedly connected to the No. 1 motor bracket, and the No. 1 motor bracket is fixedly connected to the inner wall of the bed; a turntable is provided at the bottom of the turret, and a plurality of placement grooves arranged in an annular manner are provided above the turntable, and the outer sides of the placement grooves are each provided with a No. 1 annular wall, and the middle part of the inner surface of the No. 1 annular wall is provided with an arc-shaped protrusion; stamping dies with different bottom shapes are placed in each of the placement grooves, and a spring is wound around the surface of the die body, the upper end of the spring is fixedly connected to the bottom of the die cap-shaped top end, and the lower end is fixedly connected to the inner wall of the bottom of the placement groove; the outer side of the bottom of the die cap-shaped top end is provided with a No. 2 ring shaped wall, a circle of air bags is provided on the outer side of the bottom of the No. 2 annular wall; the inside of the mold is provided with micro through holes left during casting, and the micro air outlets of the micro through holes are connected to the bottom of the mold, and the micro air inlet is connected to the inside of the air bag; an impact slider is provided above the stamping mold on the far right of the turntable, and the impact slider is slidably connected to the middle slide rail of the two slide rail walls; two connecting rods are fixedly connected to the top of the impact slider, the upper end of the connecting rod is rotatably connected to a crankshaft, one end of the crankshaft is rotatably connected to the inner wall of the bearing bed, and the other end is fixedly connected to the middle of the large gear, the large gear is meshed with a small gear, the small gear is fixedly connected to one end of the transmission shaft, and the other end of the transmission shaft is fixedly connected to the center of the large pulley, the large pulley is connected to a small pulley, the center of the small pulley is fixedly connected to the output shaft of the No. 2 motor, the No. 2 motor is fixedly connected to the No. 2 motor bracket, and the No. 2 motor bracket is fixedly connected to the inner wall of the bed;

[0007] Preferably, the inner walls of the two sliding rail walls are provided with an oil cavity, the surface of the sliding groove wall is provided with an oil outlet, the oil outlet and the oil cavity are connected through a channel, a one-way valve is provided outside the oil outlet, the one-way valve ball is made of elastic material, and the part located in the moving path of the impact slider is provided with micropores.

[0008] Preferably, the bottom of the impact sliding block is a dense mesh rough structure.

[0009] Preferably, the impact surface at the top of the mold is provided with nylon buffer material.

[0010] Preferably, a pair of fixed pressure rods are provided on the right side of the turntable, the upper ends of the two fixed pressure rods are fixedly connected to the two ends of a connecting arm, a threaded sleeve is provided in the middle of the connecting arm, the threaded sleeve is arranged on the surface of a vertical screw and cooperates with it, the top end of the screw is fixedly connected to the output end of the No. 3 motor, and the No. 3 motor is fixed on the No. 3 motor bracket.

[0011] Preferably, the contact portion between the bottom of the fixed pressure rod and the plate is made of rubber material.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. The present invention provides a precision automated CNC punching machine, which arranges micro through holes inside the stamping die and an air bag outside the stamping die. The micro through holes connect the inside of the air bag and the bottom of the stamping die. During the stamping process, the stroke and return stroke of the stamping die will compress the air bag. The air bag continuously deflates to form a thin air cushion layer at the bottom of the stamping die, which can effectively prevent the occurrence of material carrying in the die.

[0014] 2. The present invention provides a precision automated CNC punching machine, which sets an oil chamber inside the slide rail wall and a one-way valve at the gap between the slide rail and the impact slider, and utilizes the up and down movement of the impact slider to squeeze the lubricating oil that seeps out of the one-way valve to continuously provide lubrication for the movement of the impact slider.

[0015] 3. The present invention provides a precision automated CNC punching machine, which effectively reduces rigid collision by arranging a dense mesh rough structure at the bottom of the slider and a buffer material at the top of the mold, so as to make the force more uniform during collision, avoid the generation of oblique force, and protect the mold and the punching machine itself.

[0016] 4. The invention provides a precision automated CNC punching machine, which reduces the vibration of the plate during the punching process and avoids the displacement of the plate, thereby improving the punching accuracy by setting a fixed pressure rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is the main figure of the present invention;

[0019] Figure 2 It is a B-direction view of the present invention;

[0020] Figure 3 It is the A-direction view of the present invention;

[0021] Figure 4 It is a C-direction view of the present invention;

[0022] Figure 5 is a cross-sectional view of the interior of the mold of the present invention;

[0023] Figure 6 is a bottom surface view of the mold of the present invention;

[0024] In the figure: bed 1, turret 2, No. 1 bevel gear 3, No. 2 bevel gear 4, No. 1 motor 5, No. 1 motor bracket 6, turntable 7, placement groove 8, No. 1 annular wall 9, arc-shaped protrusion 10, mold 11, spring 12, No. 2 annular wall 13, airbag 14, micro through hole 15, micro air outlet 1501, micro air inlet 1502, impact slider 16, slide rail wall 17, connecting rod 18, crankshaft 19, large gear 20, small gear 21, transmission shaft 22, large pulley 23, small pulley 24, No. 2 motor 25, No. 2 motor bracket 26, oil chamber 27, oil outlet 28, one-way valve 29, nylon buffer material 30, fixed pressure rod 31, threaded sleeve 32, screw 33, No. 3 motor 34, No. 3 motor bracket 35. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0026] The present invention provides a precision automated CNC punching machine, comprising a bed 1, a turret 2 is provided in the middle of the bed 1, and the turret 2 is rotatably connected to the inner wall of the bed 1; a first bevel gear 3 is provided at the upper end of the turret 2, the first bevel gear 3 is meshed with a second bevel gear 4, the center of the second bevel gear 4 is fixedly connected to one end of the output shaft of a first motor 5, the first motor 5 is fixedly connected to a first motor bracket 6, and the first motor bracket 6 is fixedly connected to the inner wall of the bed 1; a turntable 7 is provided at the bottom of the turret 2, and a turntable 7 is provided above the turntable 7. There are a number of placement grooves 8 arranged in a ring, each of which is provided with a first ring wall 9 on the outside, and a circular arc-shaped protrusion 10 is provided in the middle of the inner surface of the first ring wall 9; each of the placement grooves 8 is provided with a stamping die 11 with a different bottom shape, and a spring 12 is wound around the surface of the die 11, and the upper end of the spring 12 is fixedly connected to the bottom of the cap-shaped top of the die 11, and the lower end is fixedly connected to the inner wall of the bottom of the placement groove 8; the outer side of the bottom of the cap-shaped top of the die 11 is provided with a second ring wall 13, and the bottom of the second ring wall 13 is fixedly connected to the bottom of the cap-shaped top of the die 11. A circle of airbags 14 is provided on the outside of the turntable 7; the inside of the mold 11 is provided with micro through holes 15 left during casting, and the micro air outlet 1501 of the micro through hole 15 is connected to the bottom of the mold 11, and the micro air inlet 1502 is connected to the inside of the airbag 14; an impact slider 16 is provided above the rightmost stamping mold 11 of the turntable 7, and the impact slider 16 is slidably connected to the middle slide rail of the two slide rail walls 17; the top of the impact slider 16 is fixedly connected to two connecting rods 18, and the upper end of the connecting rod 18 is rotatably connected to a crankshaft 19, and the crankshaft 19 is connected to the crankshaft 19. One end of the shaft 19 is rotatably connected to the inner wall of the bearing bed 1, and the other end is fixedly connected to the middle of the large gear 20, the large gear 20 is meshed with a small gear 21, the small gear 21 is fixedly connected to one end of the transmission shaft 22, and the other end of the transmission shaft 22 is fixedly connected to the center of a large pulley 23, the large pulley 23 is connected to a small pulley 24, the center of the small pulley 24 is fixedly connected to the output shaft of the second motor 25, the second motor 25 is fixedly connected to the second motor bracket, and the second motor bracket is fixedly connected to the inner wall of the bed 1;

[0027] When the second motor 25 starts to operate, the output shaft drives the small pulley 24 to rotate, and the small pulley 24 transmits power to the large pulley 23 through the transmission belt. Since the large pulley 23 and the small gear 21 are respectively fixedly connected to the two ends of the transmission shaft 22, the rotation of the large pulley 23 will be transmitted to the small gear 21 through the transmission shaft 22. Since the small gear 21 and the large gear 20 are meshed with each other, the large gear 20 will rotate with the small gear 21 at the same linear speed; when the large gear 20 rotates at a uniform speed, the crankshaft 19 with its center fixed will make a circular motion around the axis, thereby driving the connecting rod 18 connected to the crankshaft 19 to rotate. Since the lower end of the connecting rod 18 is fixed to the upper surface of the impact slider 16, and the impact slider 16 is stuck between the slide rail wall 17 and can only slide up and down under the constraint of the slide rail wall 17, the connecting rod 18 will push the impact slider 16 to make a reciprocating motion in the vertical direction under the constraint of the slide rail wall 17;

[0028] When the punch press is working normally, the plate is located at the bottom of the turntable 7. The corresponding mold 11 is selected according to the stamping requirements. The output shaft of the No. 1 motor 5 rotates to drive the No. 1 bevel gear 3 to rotate. Since the No. 1 bevel gear 3 is meshed with the No. 2 bevel gear 4, and the No. 2 bevel gear 4 is fixedly connected to the upper end of the turret 2, the No. 2 bevel gear 4 will drive the turret 2 to rotate at the same linear speed under the drive of the No. 1 bevel gear 3; and because the turntable 7 is fixedly connected to the bottom of the turret 2, the required stamping mold 11 is evenly arranged on the edge of the turntable 7 in a ring form, and the turret 2 is fixedly connected to the turntable 7, so it will drive the turntable 7 The turntable 7 will rotate to exchange the position of the mold 11. When the selected mold 11 moves to the bottom of the impact slider 16, the turntable 7 will stop rotating. Since the impact slider 16 reciprocates up and down, it will impact the top of the mold 11 when it moves downward, pushing the mold 11 to impact the plate downward. Then the impact slider 16 moves upward and leaves the top of the mold 11. A spring 12 is provided at the bottom of the cap-shaped top of the mold 11. Since the mold 11 moves downward, the spring 12 is in a compressed state. Now, because the impact slider 16 leaves the top of the mold 11, the mold 11 loses its downward thrust, and because the spring 12 The bottom is fixedly connected to the inner wall of the placement groove 8 on the turntable 7, so the spring 12 will move upward against the mold 11 when it rebounds; a No. 1 annular wall 9 is provided on the outside of the placement groove 8, and an arc-shaped protrusion 10 is provided in the middle of the No. 1 annular wall 9, and a No. 2 annular wall 13 is provided on the outside of the bottom of the cap-shaped top of the mold 11, and a circle of airbags 14 is provided at the bottom of the No. 2 annular wall 13. When the mold 11 rebounds, the airbag 14 at the bottom of the No. 2 annular wall 13 will touch the arc-shaped protrusion 10 in the middle of the No. 1 annular wall 9. The airbag 14 is squeezed to squeeze the internal air into the micro air inlet 1502, and then from the bottom of the mold 11 The micro air outlet 1501 at the bottom of the mold 11 is used to extrude the material. If there is a problem of material carrying at the bottom of the mold 11 at this time, the adsorbed material will fall off under the action of the airflow from the micro through hole 15, thereby preventing the mold 11 from carrying and absorbing the material. When the mold 11 continues to impact and rebound, the airbag 14 will experience an extrusion rebound during its impact and rebound. The micro air outlet 1501 at the bottom of the mold 11 continuously squeezes out gas to form a thin air cushion at the bottom of the mold 11, which greatly reduces the probability of material carrying at the bottom of the mold 11, improves the stability of the punching machine, and avoids the safety hazards and losses caused by material carrying.

[0029] As a specific embodiment of the present invention, the inner walls of the two slide rail walls 17 are provided with an oil cavity 27, the surface of the slide groove wall is provided with an oil outlet 28, the oil outlet 28 and the oil cavity 27 are connected through a channel, and a one-way valve 29 is provided outside the oil outlet 28. The valve ball of the one-way valve 29 is made of elastic material, and the part located in the moving path of the impact slider 16 is provided with micropores.

[0030] Since the impact slider 16 performs continuous up and down reciprocating motion under the action of the connecting rod 18 and the crankshaft 19, the lubrication of the impact slider 16 and the slide rail wall 17 must be considered, because the thrust on the impact slider 16 is not always vertical. If the lubrication between the impact slider 16 and the slide rail wall 17 is insufficient, the lateral wear of the impact slider 16 and the friction with the side wall will be aggravated, and the impact force cannot be guaranteed to be vertically downward during operation, affecting the processing progress and even damaging the mold 11;

[0031] Now, an oil cavity 27 is arranged on the inner wall of the two slide rail walls 17, and an oil outlet 28 is arranged on the surface of the slide rail wall 17. The oil outlet 28 and the oil cavity 27 are connected through a channel, and a one-way valve is arranged at the oil outlet 28; now, lubricating oil is injected into the oil cavity 27, and the closed one-way valve 29 can block the oil outlet 28 to prevent the lubricating oil from overflowing. The valve ball of the one-way valve 29 is made of elastic material, and the part of the one-way valve 29 located in the moving path of the impact slider 16 has micropores. When the one-way valve 29 is squeezed, the oil in the oil cavity is caused to be sprayed onto the impact slider 16 through the micropores on the surface of the valve ball under the action of pressure; because the impact slider 16 makes an up and down reciprocating motion, the lubricating oil is repeatedly sprayed from the one-way valve 29 into the gap between the impact slider 16 and the slide rail wall 17, thereby realizing continuous lubrication of the slide rail wall 17 and the side of the impact slider 16, preventing the impact slider 16 from wearing and generating heat due to insufficient lubrication, reducing its failure risk, and extending its service life.

[0032] As a specific implementation of the present invention, the bottom of the impact slider 16 is a dense mesh rough structure.

[0033] The impact slider 16 is in rigid collision with the top of the mold 11 for a long time. If its surface is flat, it is easy to produce a gap in the collision, forming an oblique impact force to damage the mold 11 and the machine base. The use of a dense mesh rough structure will make the force more uniform during the collision contact. Even if the surface is partially damaged due to the collision, it will not affect the overall direction of the force, which greatly improves the safety of the stamping operation, reduces the loss of the machine body, and increases the service life of the machine body.

[0034] As a specific embodiment of the present invention, a nylon buffer material 30 is provided on the impact surface of the top of the mold 11 .

[0035] Since the top of the mold 11 cannot be smooth and flat, there will always be a part that contacts first and a part that contacts later during a rigid collision, resulting in uneven force, causing wear and notches. These wear and notches will further cause uneven force, and even generate oblique force to damage the mold 11 itself and the turntable 7. Now a layer of nylon buffer material 30 is arranged on the top of the mold 11. Nylon has the advantages of high strength, wear resistance, corrosion resistance, and impact resistance. It greatly reduces rigid collisions without changing the strength of the mold 11, improves uniform force, prevents the mold 11 from being damaged and generating oblique destructive force, and protects the mold 11 and the turntable 7.

[0036] As a specific embodiment of the present invention, a pair of fixed pressure rods 31 are provided on the right side of the turntable 7, and the upper ends of the two fixed pressure rods 31 are fixedly connected to the two ends of a connecting arm. A threaded sleeve 32 is provided in the middle of the connecting arm. The threaded sleeve 32 is sleeved on the surface of a vertical screw 33 and cooperates with it. The top end of the screw 33 is fixedly connected to the output end of the No. 3 motor 34, and the No. 3 motor 34 is fixed on the No. 3 motor bracket 35.

[0037] When the sheet is being stamped, since the clamp cannot completely fit the surface of the punch press, the sheet is in a slightly tilted state during stamping. When the stamping die 11 continues to impact its surface, vibration and deviation will occur, seriously affecting the processing accuracy. Now, before the die 11 is stamped, the third motor 34 is started to drive the lead screw 33 fixedly connected to its output end to rotate. Since a threaded sleeve 32 is sleeved on the lead screw 33, and the inner surface thread of the threaded sleeve 32 cooperates with the surface thread of the lead screw 33, the rotation of the lead screw 33 can control the threaded sleeve 32 to move downward. The threaded sleeve 32 is a part of the connecting arm, so the connecting arm moves with The connecting arm 32 moves downward together with the threaded sleeve 32, and because a pair of fixed pressure rods 31 are fixedly connected at both ends of the connecting arm, the fixed pressure rods 31 will move downward with the connecting arm until the bottom end of the fixed pressure rods 31 presses the plate, and the No. 3 motor 34 stops rotating. When a stamping process is completed, the No. 3 motor 34 reverses to lift the fixed pressure rod 31 upward, and the plate moves. The No. 3 motor 34 drives the fixed pressure rod 31 forward to compact the plate so as to carry out the next stamping process, and so on. The fixed pressure rod 31 compacts and fixes the plate, thereby preventing the plate from displacement and vibration during the stamping process, and greatly improving the stamping accuracy.

[0038] As a specific implementation of the present invention, the bottom of the fixed pressure rod 31 in contact with the plate is made of rubber.

[0039] The rubber material has a high friction coefficient, and after the pressure is applied by the fixed pressure rod 31, the position of the plate can be well fixed to prevent it from deflecting and shaking.

[0040] Working principle: the second motor 25 starts to operate, and the output shaft drives the small pulley 24 to rotate. The small pulley 24 transmits power to the large pulley 23 through the transmission belt. Since the large pulley 23 and the small gear 21 are respectively fixedly connected to the two ends of the transmission shaft 22, the rotation of the large pulley 23 will be transmitted to the small gear 21 through the transmission shaft 22. Since the small gear 21 and the large gear 20 are meshed with each other, the large gear 20 will rotate with the small gear 21 at the same linear speed; when the large gear 20 rotates at a uniform speed, the crankshaft 19 with its center fixed will make a circular motion around the axis, thereby driving the connecting rod 18 connected to the crankshaft 19 to rotate. Since the lower end of the connecting rod 18 is fixed to the upper surface of the impact slider 16, and the impact slider 16 is stuck between the slide rail walls 17 and can only slide up and down under the constraint of the slide rail walls 17, the connecting rod 18 will push the impact slider 16 to make a vertical reciprocating motion under the constraint of the slide rail walls 17;

[0041] When the punch press is working normally, the plate is located at the bottom of the turntable 7. The corresponding die 11 is selected according to the stamping requirements. The output shaft of the No. 1 motor 5 rotates to drive the No. 1 bevel gear 3 to rotate. Since the No. 1 bevel gear 3 is meshed with the No. 2 bevel gear 4, and the No. 2 bevel gear 4 is fixedly connected to the upper end of the turret 2, the No. 2 bevel gear 4 will drive the turret 2 to rotate at the same linear speed under the drive of the No. 1 bevel gear 3; and because the bottom of the turret 2 is fixedly connected to the turntable 7, the required stamping die 11 is evenly arranged on the edge of the turntable 7 in a ring shape, and the turret 2 and the turntable 7 are connected. The fixed connection will drive the turntable 7 to rotate and thus exchange the position of the mold 11. When the selected mold 11 moves to the bottom of the impact slider 16, the turntable 7 will stop rotating. Since the impact slider 16 reciprocates up and down, it will impact the top of the mold 11 when it moves downward, pushing the mold 11 to impact the plate downward. Then the impact slider 16 moves upward and leaves the top of the mold 11. A spring 12 is provided at the bottom of the cap-shaped top of the mold 11. Since the mold 11 moves downward, the spring 12 is in a compressed state. Now, because the impact slider 16 has left the mold 11, the mold 11 loses its downward thrust, and because the bottom of the spring 12 is fixedly connected to the inner wall of the placement groove 8 on the turntable 7, the spring 12 will push the mold 11 to move upward when it rebounds; a first annular wall 9 is provided on the outer side of the placement groove 8, and an arc-shaped protrusion 10 is provided in the middle of the first annular wall 9, and a second annular wall 13 is provided on the outer side of the bottom of the cap-shaped top of the mold 11, and a circle of air bags 14 is provided at the bottom of the second annular wall 13. When the mold 11 rebounds, the air bags 14 at the bottom of the second annular wall 13 will touch the arc-shaped protrusion in the middle of the first annular wall 9. From 10, the airbag 14 is squeezed and the internal air is squeezed into the micro air inlet 1502, and then squeezed out from the micro air outlet 1501 at the bottom of the mold 11. At this time, if there is a problem of material carrying at the bottom of the mold 11, the adsorbed material will fall off under the action of the airflow at the micro through hole 15 outlet. When the mold 11 continues to impact and rebound, the airbag 14 will experience an extrusion rebound during its impact and rebound. The micro air outlet 1501 at the bottom of the mold 11 continuously squeezes out gas to form a thin air cushion at the bottom of the mold 11, which effectively prevents the occurrence of material carrying.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A precision automated CNC punching machine, characterized in that: The invention comprises a bed (1), wherein a turret (2) is provided in the middle of the bed (1), and the turret (2) is rotatably connected to the inner wall of the bed (1); a first bevel gear (3) is provided at the upper end of the turret (2), and the first bevel gear (3) is meshed with a second bevel gear (4), and the center of the second bevel gear (4) is fixedly connected to one end of the output shaft of a first motor (5), and the first motor (5) is fixedly connected to a first motor bracket (6), and the first motor bracket (6) is fixedly connected to the inner wall of the bed (1); a turntable (7) is provided at the bottom of the turret (2), and a plurality of placement grooves arranged in an annular manner are provided above the turntable (7). (8), a first annular wall (9) is provided on the outside of the placement groove (8), and a circular arc-shaped protrusion (10) is provided in the middle of the inner surface of the first annular wall (9); a stamping die (11) with a different bottom shape is placed in each of the placement grooves (8), and a spring (12) is wound around the surface of the die body of the die (11), and the upper end of the spring (12) is fixedly connected to the bottom of the cap-shaped top of the die (11), and the lower end is fixedly connected to the inner wall of the bottom of the placement groove (8); a second annular wall (13) is provided on the outside of the bottom of the cap-shaped top of the die (11), and a circle of air bags (14) are provided on the outside of the bottom of the second annular wall (13). ); the mold (11) is provided with micro through holes (15) left during casting, and the micro air outlet (1501) of the micro through hole (15) is connected to the bottom of the mold (11), and the micro air inlet (1502) is connected to the inside of the air bag (14); an impact slider (16) is provided above the rightmost stamping mold (11) of the turntable (7), and the impact slider (16) is slidably connected to the middle slide rail of the two slide rail walls (17); two connecting rods (18) are fixedly connected to the top of the impact slider (16), and the upper end of the connecting rod (18) is rotatably connected to a crankshaft (19), and one end of the crankshaft (19) is connected to the crankshaft (19). The bearing is rotatably connected to the inner wall of the bed (1), and the other end is fixedly connected to the middle of the large gear (20). The large gear (20) is meshed with a small gear (21). The small gear (21) is fixedly connected to one end of the transmission shaft (22), and the other end of the transmission shaft (22) is fixedly connected to the center of a large pulley (23). The large pulley (23) is connected to a small pulley (24). The center of the small pulley (24) is fixedly connected to the output shaft of the second motor (25). The second motor (25) is fixedly connected to the second motor bracket (26). The second motor bracket (26) is fixedly connected to the inner wall of the bed (1); When the punch press is working normally, the plate is located at the bottom of the turntable (7), and the corresponding mold (11) is selected according to the punching requirements. The output shaft of the No. 1 motor (5) rotates to drive the No. 1 bevel gear (3) to rotate. Since the No. 1 bevel gear (3) is meshed with the No. 2 bevel gear (4), and the No. 2 bevel gear (4) is fixedly connected to the upper end of the turret (2), the No. 2 bevel gear (4) will drive the turret (2) to rotate at the same linear speed under the drive of the No. 1 bevel gear (3); and because the bottom of the turret (2) is fixedly connected to the turntable (7), the required punching molds (11) are evenly arranged in a ring shape on the edge of the turntable (7), and the turret (2) and the turntable are connected. (7) is fixedly connected, so it drives the turntable (7) to rotate, thereby exchanging the position of the mold (11). When the selected mold (11) moves to the bottom of the impact slider (16), the turntable (7) stops rotating. Since the impact slider (16) reciprocates up and down, it will impact the top of the mold (11) when it moves downward, pushing the mold (11) downward to impact the plate. Then, the impact slider (16) moves upward and leaves the top of the mold (11). A spring (12) is provided at the bottom of the cap-shaped top of the mold (11). Since the mold (11) moves downward, the spring (12) is in a compressed state. Now, because the impact slider (16) has left the mold The mold (11) has a top end, and the mold (11) loses its downward thrust. Since the bottom of the spring (12) is fixedly connected to the inner wall of the placement groove (8) on the turntable (7), the spring (12) will move upward against the mold (11) when it rebounds. A first annular wall (9) is provided on the outside of the placement groove (8), and a circular arc-shaped protrusion (10) is provided in the middle of the first annular wall (9). A second annular wall (13) is provided on the outside of the bottom of the cap-shaped top of the mold (11), and a circle of air bags (14) is provided at the bottom of the second annular wall (13). When the mold (11) rebounds, the air bags (14) at the bottom of the second annular wall (13) will touch the first annular wall (9). The arc-shaped protrusion (10) in the middle, when squeezed, will squeeze the internal air into the micro air inlet (1502), and then squeeze it out from the micro air outlet (1501) at the bottom of the mold (11). At this time, if there is a problem of material carrying at the bottom of the mold (11), the adsorbed material will fall off under the action of the airflow at the air outlet of the micro through hole (15). When the mold (11) continues to impact and rebound, the air bag (14) will experience an extrusion rebound during its impact and rebound. The micro air outlet (1501) at the bottom of the mold (11) continuously squeezes out gas to form a thin air cushion at the bottom of the mold (11), which effectively prevents the occurrence of material carrying.

2. A precision automated CNC punch press according to claim 1, characterized in that: An oil cavity (27) is provided on the inner wall of the two slide rail walls (17), and an oil outlet (28) is provided on the surface of the slide groove wall. The oil outlet (28) and the oil cavity (27) are connected through a channel. A one-way valve (29) is provided outside the oil outlet (28). The valve ball of the one-way valve (29) is made of elastic material, and a micro hole is provided in the part located in the moving path of the impact slider (16).

3. The precision automated CNC punch press according to claim 1, characterized in that: The bottom of the impact sliding block (16) is a dense mesh rough structure.

4. The precision automated CNC punch press according to claim 1, characterized in that: The impact-bearing surface at the top of the mold (11) is provided with a nylon buffer material (30).

5. The precision automated CNC punch press according to claim 1, characterized in that: A pair of fixed pressure rods (31) are provided on the right side of the turntable (7), the upper ends of the two fixed pressure rods (31) are fixedly connected to the two ends of a connecting arm, a threaded sleeve (32) is provided in the middle of the connecting arm, the threaded sleeve (32) is sleeved on the surface of a vertical lead screw (33) and cooperates with it, the top end of the lead screw (33) is fixedly connected to the output end of the third motor (34), and the third motor (34) is fixed on the third motor bracket (35).

6. The precision automated CNC punch press according to claim 5, characterized in that: The bottom of the fixed pressure rod (31) in contact with the plate is made of rubber.

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