A punching device for mechanical processing parts

Abstract

The present invention discloses a punching device for parts used in mechanical processing, comprising a shell, a hydraulic cylinder, a support pipe, a collection box and a base. The hydraulic cylinder is fixedly installed inside the shell, and the end of the piston rod of the hydraulic cylinder slides through the shell and is fixedly installed with a punching head. Two guide rods are fixedly connected to the shell, and the hydraulic cylinder drives the punching head to punch the pipe. The guide rods can ensure the accuracy of the pressure head when moving, and improve the accuracy of the pipe punching. A feeding mechanism is provided on the support pipe, and the feeding mechanism is used for automatically collecting the blanks of the pipe punching, thereby improving the work efficiency. The support pipe can coaxially position and support the pipe, and ensure the punching accuracy of the pipe. A limiting mechanism is provided at one end of the pipe away from the three-jaw chuck, and the limiting mechanism provides stable limiting fixation to the axial and radial directions of the pipe when the pipe is punched, thereby ensuring the punching accuracy of the pipe.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing and punching, and in particular to a part punching device for mechanical processing. Background Art

[0002] When punching pipe parts, there is a problem that the punching column pushes the fragments that fall off the tubular workpiece into the inner cavity of the tubular workpiece, and the operator needs to pour out the fragments later, which increases the workload of the operator and reduces the efficiency of the operator in punching holes on the tubular workpiece through the punching equipment;

[0003] After searching, for example, in the technical scheme of a directional punching device for tubular workpieces with patent publication number CN117340108 A, although the punching device can leave the fragments inside the pipe column supporting the pipe when punching the pipe, and the staff does not need to pour out the fragments inside the pipe separately, but after the punching is completed, it is necessary to use the punching column to complete a single punching action to squeeze out the waste in the pipe column without punching, but this will also reduce the efficiency of the punching device in opening holes on the tubular workpiece, and the existing punching equipment cannot provide a comprehensive and stable limiting effect when limiting and fixing the pipe, resulting in the punching quality of the pipe cannot be guaranteed. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problems and to propose a punching device for parts used in mechanical processing.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The cam is provided with a plurality of guide rods, and the outer wall of the cam is provided with a plurality of guide rods, and the guide rods are provided with a plurality of guide rods.

[0007] Optionally, a connecting hole is opened in the middle position inside the support tube, and circular holes are respectively provided at the upper and lower ends of the connecting hole, and the end of the circular hole away from the connecting hole passes through the support tube, and the diameter of the connecting hole is larger than the diameter of the circular hole, and two opposing pressure plates are provided in the connecting hole, one of which is fixed in the connecting hole, and an extrusion groove is provided on one side of the connecting hole, and a sliding column is slidably connected inside the extrusion groove, and the end of the sliding column close to the connecting hole is fixed to the other pressure plate.

[0008] Optionally, a through hole is further provided on the support tube, and one end of the sliding column away from the connecting hole slides and extends into the inside of the through hole and the end is an inclined surface, and a lifting plate is fixedly connected to the lower end of the connecting plate, and the lifting plate is set in a "U" shape, and the support tube passes through the lifting plate, and a top column is fixedly connected to the lifting plate, and the central axis of the top column coincides with the central axis of the through hole, and the upper end of the top column is also set as an inclined surface, and the inclined surface of the top column slides with the inclined surface of the sliding column, the diameter of the through hole is larger than the diameter of the top column, and the pressure plates are all arc-shaped, and a spring is fixedly connected between the pressure plate connected to the sliding column and the inner wall of the connecting hole.

[0009] Optionally, a baffle is provided below the sliding column, and the baffle is slidably connected to the inside of the support tube, one end of the baffle extends into the circular hole below the pressure plate, and the other end of the baffle slides through the support tube and extends to the inside of the shell, an avoidance groove is provided on the side of the baffle close to the top column, and the width of the avoidance groove is greater than the diameter of the top column, and a rack 2 is provided on the side of the baffle located inside the shell.

[0010] Optionally, a rack 1 is fixedly connected to the side wall of one end of the connecting plate located inside the shell, and a rotating shaft is rotatably connected to the inner wall of the shell. Two gears are fixedly connected to the rotating shaft, and the gear on the side away from the support tube is meshed with rack 1, and the other gear is meshed with rack 2.

[0011] Optionally, a long plate is fixedly connected to the inner wall of the shell, a fixed plate is fixedly connected to the lower end of one side of the baffle located inside the shell, a guide column is fixedly connected to the side wall of the fixed plate, and one end of the guide column away from the fixed plate is slidably connected to the long plate, and a spring 2 is sleeved on the outer wall of the guide column, and the spring 2 is fixedly connected between the long plate and the fixed plate.

[0012] Optionally, the limiting mechanism includes a fixed ring, a limiting block and a moving block, the limiting block is fixedly connected to the upper end of the support plate, the limiting block is fitted with the end of the pipe, a fixed groove one and two fixed grooves two are provided on the base, the fixed groove one is arranged in the middle position of the two fixed grooves two, a motor is fixedly connected to the side wall of the fixed groove one, a threaded rod is fixedly connected to the output shaft of the motor, the other end of the threaded rod is rotatably connected to the fixed groove one, and a moving block is threadedly connected to the threaded rod.

[0013] Optionally, the moving block is rotatably connected to the bottom of the fixed ring, a support block is fixedly connected to the side wall of the fixed ring away from the pipe, a cylinder is fixedly connected to the moving block, the piston rod of the cylinder is hinged to the support block, a double-headed cylinder is fixedly installed on the side wall of the pipe above the support block, the two piston rod ends of the double-headed cylinder are respectively fixedly connected to brackets, the brackets are fixedly connected to clamping blocks, a limiting groove is provided on the fixed ring, and an arc-shaped clamping plate is provided at one end of the clamping block located inside the limiting groove.

[0014] The present invention has the following advantages:

[0015] 1. The feeding mechanism provided in the present application can not only automatically collect waste materials into a collection box when performing a single-side single-hole punching operation on the pipe, but also will not affect the movement of the punching head when performing a double-sided hole punching operation. At the same time, the waste materials can be automatically collected into the collection box, thereby realizing that both a single-side single-hole punching operation and a double-sided hole punching operation can be performed on one punching device, thereby avoiding the problem in the prior art that the punching device can automatically collect waste materials into the collection box only when performing a double-sided hole punching operation.

[0016] 2. By setting up structures such as baffles, connecting plates, gears, etc., the cylinder can be used to drive the punching head to move when the punching head performs a single-side single-hole punching operation, so that the connecting plate can drive the baffle to block the circular hole below through the cooperation of rack 1 and gear to prevent waste from entering the pipe. When the punching is completed, the punching head moves upward, rack 1 drives the gear to reverse, so that the baffle is reset and no longer blocks the circular hole, and the waste automatically falls into the collection box from the support tube through the support plate.

[0017] 3. By setting the lifting plate, the top column and the sliding column, when the punching head performs a single-side single-hole punching operation, the punching head descends to drive the connecting plate to descend, and the connecting plate drives the lifting plate to descend. The punching head will bring the punched waste from the round hole into the connecting hole. When the punching head moves upward and separates from the waste, it will drive the connecting plate, the lifting plate and the top column to move upward. The inclined surface of the top column squeezes the inclined surface of the sliding column, thereby driving one of the pressure plates to move closer to the other pressure plate, thereby squeezing the waste and shrinking it, avoiding jamming when passing through the circular hole and the feeding hole below.

[0018] 4. The setting of the limit block and the fixing ring can limit and fix the pipe in the axial and radial directions at the same time, ensuring the accuracy of the pipe punching. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a side structural schematic diagram of the present invention;

[0021] Figure 3 For the present invention Figure 2 The structural diagram at A in the middle;

[0022] Figure 4 It is a structural schematic diagram of the baffle of the present invention;

[0023] Figure 5 It is a schematic diagram of the front structure of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure inside the housing of the present invention;

[0025] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at B in the middle;

[0026] Figure 8 For the present invention Figure 6 Schematic diagram of the structure at C in the middle;

[0027] Fig. 9 It is a schematic diagram of the back structure of the present invention;

[0028] Fig.10 For the present invention Fig. 9 Schematic diagram of the structure at D in the figure.

[0029] In the figure: 1, housing; 2, hydraulic cylinder; 201, avoidance groove; 202, rack 2; 3, pipe; 4, fixing ring; 5, cylinder; 6, collection box; 7, support plate; 8, lifting plate; 9, support pipe; 10, guide rod; 11, connecting plate; 12, punch head; 13, fixing groove 1; 14, round hole; 15, connecting hole; 16, extrusion groove; 17, pressure plate; 18, spring 1; 19, limit block; 20, baffle; 2 1. Push column; 22. Sliding column; 23. Through hole; 24. Three-jaw chuck; 25. Gear; 26. Motor; 27. Threaded rod; 28. Moving block; 29. ​​Rotating shaft; 30. Rack one; 31. Fixed plate; 32. Spring two; 33. Long plate; 34. Fixed slot two; 35. Double-headed cylinder; 36. Bracket; 37. Support block; 38. Clamp block; 39. Support seat; 40. Base; 401. Limiting slot; 41. Guide column. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] Reference Figure 1-10 A punching device for mechanical processing parts includes a shell 1, a hydraulic cylinder 2, a support pipe 9, a collection box 6 and a base 40. The hydraulic cylinder 2 is fixedly installed inside the shell 1. The end of the piston rod of the hydraulic cylinder 2 slides through the shell 1 and is fixedly installed with a punch head 12. Two guide rods 10 are fixedly connected to the shell 1. The hydraulic cylinder 2 drives the punch head 12 to punch the pipe 3. The guide rod 10 can ensure the accuracy of the punch head 12 when it moves, and improve the accuracy of the punching of the pipe 3. The outer wall of the piston rod of the hydraulic cylinder 2 is fixedly connected with a connecting plate 11, and the connecting plate 11 is slidably connected to the guide rod 10. A three-jaw chuck 24 is also fixedly installed inside the shell 1. The support pipe 9 It is clamped and fixed at the center position of the three-jaw chuck 24, and one end of the support tube 9 slides through the shell 1 and extends to the inside of the shell 1. The three-jaw chuck 24 is convenient for clamping and fixing support tubes 9 of different diameters, thereby improving the positioning accuracy of the support tube 9. A blanking mechanism is provided on the support tube 9, and the blanking mechanism is used to automatically collect the blanks of the punched tube 3, thereby improving the work efficiency. The base 40 is fixedly connected to one side of the shell 1, and a support seat 39 is movably installed on the base 40 by bolts. A support plate 7 is fixedly connected to the support seat 39, and the support plate 7 can provide stable support for the bottom of the tube 3, thereby facilitating the punching of the tube 3 and avoiding flanging during punching. The collecting box 6 is placed under the supporting plate 7, which is provided with a feeding hole. The outer sliding sleeve of the supporting tube 9 is provided with the pipe 3. The supporting tube 9 can coaxially position and support the pipe 3 to ensure the punching accuracy of the pipe 3. A limiting mechanism is provided at one end of the pipe 3 away from the three-jaw chuck 24. When the pipe 3 is punched, the limiting mechanism provides stable limiting fixation for the axial and radial directions of the pipe 3 to ensure the punching accuracy of the pipe 3.

[0033] A connecting hole 15 is provided in the middle of the support tube 9, and circular holes 14 are provided at the upper and lower ends of the connecting hole 15, respectively. The circular holes 14 are used to cooperate with the punching head 12 to punch the tube 3. The ends of the circular holes 14 away from the connecting holes 15 penetrate the support tube 9, and the diameter of the connecting holes 15 is larger than the diameter of the circular holes 14. During the punching operation, the diameter of the hole to be punched in the tube 3 must be the same as the diameter of the circular holes 14 to ensure the punching quality and avoid flanging. Therefore, the diameter of the waste material after punching is the same as the diameter of the circular holes 14, so it is easy for the waste material to be stuck inside the circular holes 14. In the present invention, two opposing pressing plates 17 are provided in the connecting hole 15, one of which is fixedly connected to the connecting hole 15. An extrusion groove 16 is provided on one side of the connecting hole 15. A slide column 22 is slidably connected inside the extrusion groove 16. One end of the slide column 22 close to the connecting hole 15 is fixedly connected to the other pressing plate 17. When waste falls between the two pressing plates 17, the two pressing plates 17 can squeeze the waste into smaller size in the connecting hole 15, so that the waste will not get stuck when passing through the circular hole 14 below and the discharge hole on the support plate 7, thereby significantly improving the work efficiency.

[0034] The support tube 9 is also provided with a through hole 23, and one end of the sliding column 22 away from the connecting hole 15 slides and extends into the inside of the through hole 23 and the end is an inclined surface. The lower end of the connecting plate 11 is fixedly connected with a lifting plate 8, and the lifting plate 8 is set to a "U" shape, and the support tube 9 passes through the lifting plate 8. A top column 21 is fixedly connected to the lifting plate 8, and the central axis of the top column 21 coincides with the central axis of the through hole 23, and the upper end of the top column 21 is also set to an inclined surface, and the inclined surface of the top column 21 slides with the inclined surface of the sliding column 22. The diameter of the through hole 23 is larger than the diameter of the top column 21, and the pressing plate 17 is arc-shaped. A spring 18 is fixedly connected between the pressing plate 17 connected to the sliding column 22 and the inner wall of the connecting hole 15. When the pipe 3 is punched with a single hole on one side, the hydraulic cylinder 2 drives the punching head 12 to move downward, and the connecting plate 11, the lifting plate 8 and the top column 21 move downward accordingly, and the punching head 12 will punch The waste material below is brought into the connecting hole 15 by the circular hole 14. When the punch head 12 moves upward and disengages from the waste material, it will drive the connecting plate 11, the lifting plate 8 and the top column 21 to move upward accordingly. The inclined surface of the top column 21 squeezes the inclined surface of the sliding column 22, thereby driving one of the pressure plates 17 to move in the direction close to the other pressure plate 17, thereby squeezing the waste material and shrinking the waste material to avoid jamming when passing through the circular hole 14 and the feeding hole below. When the pipe 3 is punched on both sides, the punch head 12 moves downward, driving the connecting plate 11, the lifting plate 8 and the top column 21 to continue to move downward. The sliding column 22 and the top column 21 always remain disengaged. Under the action of the spring 18, the pressure plates 17 are moved away from each other, which will not hinder the punch head 12 from passing through the connecting hole 15. The punch head 12 will move downward until it passes through the feeding hole, and the waste material will directly fall into the collection box 6.

[0035] A baffle plate 20 is provided below the sliding column 22 , and the baffle plate 20 is slidably connected inside the support tube 9 , one end of the baffle plate 20 extends into the circular hole 14 below the pressure plate 17 , and the other end of the baffle plate 20 slides through the support tube 9 and extends to the inside of the housing 1 .

[0036] When punching a pipe 3 with a large diameter and a relatively small wall thickness, there will be a certain gap between the large diameter pipe 3 and the support tube 9. The baffle 20 is used to block the circular hole 14 at the bottom to prevent some waste from directly entering the pipe 3 when performing a single-side single-hole punching operation, so that subsequent staff members need to clean out the waste inside the pipe 3 separately when pulling the pipe 3 out of the support tube 9, which reduces work efficiency. An avoidance groove 201 is provided on the side of the baffle 20 close to the top column 21, and the width of the avoidance groove 201 is greater than the diameter of the top column 21. The avoidance groove 201 facilitates the unimpeded up and down movement of the top column 21, and a rack 202 is provided on the side of the baffle 20 located inside the shell 1.

[0037] The connecting plate 11 is located on one end of the side wall of the shell 1 and is fixedly connected to a rack 1 30. The inner wall of the shell 1 is rotatably connected to a rotating shaft 29. Two gears 25 are fixedly connected to the rotating shaft 29. The gear 25 on the side away from the support tube 9 is meshed with the rack 1 30, and the other gear 25 is meshed with the rack 2 202.

[0038] A long plate 33 is also fixedly connected to the inner wall of the shell 1, and a fixed plate 31 is fixedly connected to the lower end of one side of the baffle 20 located inside the shell 1. A guide column 41 is fixedly connected to the side wall of the fixed plate 31, and one end of the guide column 41 away from the fixed plate 31 is slidably connected to the long plate 33. A spring 2 32 is sleeved on the outer wall of the guide column 41, and the spring 2 32 is fixedly connected between the long plate 33 and the fixed plate 31.

[0039] When performing a single-sided single-hole punching operation, the hydraulic cylinder 2 drives the punch head 12 to move downward, thereby driving the connecting plate 11 to move downward, and the rack 130 on the connecting plate 11 drives the gear 25 to rotate, and the gear 25 drives another coaxial gear 25 to rotate through the rotating shaft 29, and the gear 25 drives the baffle 20 to move toward the connecting hole 15 through the rack 202, and the baffle 20 will squeeze the spring 232 until the baffle 20 blocks the circular hole 14 below. When the pipe 3 is punched on both sides, the punch head 12 moves downward through the upper circular hole 14 and enters the connecting hole 15. At this time, the rack 130 on the connecting plate 11 will disengage from the gear 25 when the punch head 12 continues to move downward, and under the action of the spring 232, the baffle 20 will be pulled to move in the direction away from the connecting hole 15, thereby preventing the baffle 20 from hindering the downward movement of the punch head 12.

[0040] The limiting mechanism includes a fixed ring 4, a limiting block 19 and a moving block 28. The limiting block 19 is fixedly connected to the upper end of the support plate 7. The limiting block 19 fits with the end of the pipe 3. The limiting block 19 can limit and fix one end of the pipe 3. A fixing groove 13 and two fixing grooves 2 34 are provided on the base 40. The fixing groove 13 is arranged in the middle position of the two fixing grooves 2 34. A motor 26 is fixedly connected to the side wall of the fixing groove 13. A threaded rod 27 is fixedly connected to the output shaft of the motor 26. The other end of the threaded rod 27 is rotatably connected to the fixing groove 13. The moving block 28 is threadedly connected to the threaded rod 27. When the motor 26 is started, it can drive the threaded rod 27 to rotate, the threaded rod 27 drives the moving block 28 to move, and the moving block 28 drives the fixed ring 4 to move.

[0041] The moving block 28 is rotatably connected to the bottom of the fixed ring 4, and a support block 37 is fixedly connected to the side wall of the fixed ring 4 away from the pipe 3. The moving block 28 is fixedly connected to the cylinder 5, and the piston rod of the cylinder 5 is hinged to the support block 37. A double-headed cylinder 35 is fixedly installed on the side wall of the pipe 3 above the support block 37, and the two piston rod ends of the double-headed cylinder 35 are respectively fixedly connected to brackets 36, and clamping blocks 38 are fixedly connected to the brackets 36. A limiting groove 401 is provided on the fixed ring 4, and an arc-shaped clamping plate is provided at one end of the clamping block 38 located inside the limiting groove 401. When the pipe 3 is punched, the two piston rods of the double-headed cylinder 35 will move the arc-shaped clamping plate closer to each other through the bracket 36, thereby limiting and fixing the pipe 3.

[0042] When punching the pipe 3, first drive the fixing ring 4 to rotate clockwise on the moving block 28 through the cylinder 5 until the highest point of the fixing ring 4 will not hinder the pipe 3 from being inserted outside the support tube 9, and one end of the pipe 3 fits with the limit block 19, the limit block 19 limits one end of the pipe 3, and the support plate 7 supports the pipe 3 at the same time, then the motor 26 starts to drive the threaded rod 27 to rotate, the threaded rod 27 drives the moving block 28 to move, the moving block 28 drives the fixing ring 4 to move to a suitable position, the cylinder 5 drives the fixing ring 4 to rotate in the opposite direction, and uses the fixing ring 4 to limit the axial and radial directions of the pipe 3 at the same time to ensure the punching accuracy of the pipe 3. When a single-side single-hole punching operation is required, the hydraulic cylinder 2 drives the punching head 12 to move downward, and at the same time drives the connecting plate 11 to move downward, the connecting plate 11 drives the lifting plate 8 and the rack 30 to move downward, and the gear 30 drives the lifting plate 8 and the rack 30 to move downward. The rack 1 30 drives a gear 25 to rotate, and the other gear 25 drives the baffle 20 through the rack 202 to seal the circular hole 14 below, so as to prevent waste from entering the interior of the pipe 3. The staff needs to clean it up separately later, which reduces the work efficiency. When the punching is completed, the pipe 3 is pulled out, and the punch head 12 moves upward to separate from the waste, which will drive the connecting plate 11, the lifting plate 8 and the top column 21 to move upward accordingly. The inclined surface of the top column 21 squeezes the inclined surface of the sliding column 22, thereby driving one of the pressure plates 17 to move in the direction close to the other pressure plate 17, so as to squeeze the waste and shrink the waste, so as to avoid jamming when passing through the circular hole 14 and the feeding hole below. At the same time, when the rack 1 30 drives the gear 25 to reverse, it can drive the baffle 20 to reset, and the waste can fall into the collection box 6.

[0043] When punching of holes on both sides is required, the punch head 12 is driven by the hydraulic cylinder 2 to move downward until it passes through the blanking hole of the support plate 7. During this period, the rack 30 and the gear 25 are disengaged during the downward movement of the connecting plate 11, and the baffle 20 is reset away from the connecting hole 15, thereby not hindering the downward movement of the punch head 12.

[0044] The above description is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, shall make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention, which shall be covered within the protection scope of the present invention. In the present invention, unless otherwise clearly specified and limited, the terms "cover", "embedded", "connected", "fixed", "distributed" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integrated one; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

Claims

1. A punching device for mechanical processing parts, comprising a housing (1), a hydraulic cylinder (2), a support pipe (9), a collection box (6) and a base (40), wherein the hydraulic cylinder (2) is fixedly mounted inside the housing (1), the piston rod end of the hydraulic cylinder (2) slides through the housing (1) and is fixedly mounted with a punch head (12), and two guide rods (10) are fixedly connected to the housing (1), characterized in that: The outer wall of the piston rod of the hydraulic cylinder (2) is fixedly connected with a connecting plate (11), and the connecting plate (11) is slidably connected with the guide rod (10). A three-jaw chuck (24) is also fixedly installed inside the housing (1). The support tube (9) is clamped and fixed at the center position of the three-jaw chuck (24), and one end of the support tube (9) slides through the housing (1) and extends into the housing (1). A material discharge mechanism is provided on the support tube (9). The base (40) is fixedly connected to one side of the housing (1). A support seat (39) is movably installed on the base (40) by bolts. A support plate (7) is fixedly connected to the support seat (39). The collection box (6) is placed below the support plate (7). A material discharge hole is provided on the support plate (7). The outer sliding sleeve of the support tube (9) is provided with a pipe (3), and a limiting mechanism is provided at one end of the pipe (3) away from the three-jaw chuck (24). A connecting hole (15) is provided in the middle of the support tube (9), and circular holes (14) are provided at the upper and lower ends of the connecting hole (15), and the ends of the circular holes (14) away from the connecting hole (15) penetrate the support tube (9), and the diameter of the connecting hole (15) is larger than the diameter of the circular hole (14). Two opposing pressing plates (17) are provided in the connecting hole (15), and one of the pressing plates (17) is fixedly connected in the connecting hole (15). An extrusion groove (16) is provided on one side of the connecting hole (15), and a sliding column (22) is slidably connected in the extrusion groove (16), and the end of the sliding column (22) close to the connecting hole (15) is fixedly connected to the other pressing plate (17); The support tube (9) is also provided with a through hole (23), one end of the slide column (22) away from the connecting hole (15) slides and extends into the inside of the through hole (23) and the end is an inclined surface, the lower end of the connecting plate (11) is fixedly connected with a lifting plate (8), the lifting plate (8) is set in a "U" shape, and the support tube (9) passes through the lifting plate (8), the lifting plate (8) is fixedly connected with a top column (21), the central axis of the top column (21) coincides with the central axis of the through hole (23), and the upper end of the top column (21) is also set as an inclined surface, the inclined surface of the top column (21) is slidably matched with the inclined surface of the slide column (22), the diameter of the through hole (23) is larger than the diameter of the top column (21), the pressing plate (17) is all in an arc shape, and a spring 1 (18) is fixedly connected between the pressing plate (17) connected to the slide column (22) and the inner wall of the connecting hole (15); A baffle (20) is provided below the sliding column (22), and the baffle (20) is slidably connected to the inside of the support tube (9). One end of the baffle (20) extends into the circular hole (14) below the pressure plate (17), and the other end of the baffle (20) slides through the support tube (9) and extends into the inside of the shell (1). A side of the baffle (20) close to the top column (21) is provided with an avoidance groove (201), and the width of the avoidance groove (201) is greater than the diameter of the top column (21). A rack 2 (202) is provided on the side of the baffle (20) located inside the shell (1); The limiting mechanism comprises a fixed ring (4), a limiting block (19) and a moving block (28), wherein the limiting block (19) is fixedly connected to the upper end of the support plate (7), the limiting block (19) is in contact with the end of the pipe (3), the base (40) is provided with a fixing groove 1 (13) and two fixing grooves 2 (34), the fixing groove 1 (13) is arranged at a middle position between the two fixing grooves 2 (34), a motor (26) is fixedly connected to the side wall of the fixing groove 1 (13), a threaded rod (27) is fixedly connected to the output shaft of the motor (26), the other end of the threaded rod (27) is rotatably connected to the fixing groove 1 (13), and the moving block (28) is threadedly connected to the threaded rod (27); The moving block (28) is rotatably connected to the bottom of the fixing ring (4); a support block (37) is fixedly connected to the side wall of the fixing ring (4) away from the pipe (3); a cylinder (5) is fixedly connected to the moving block (28); a piston rod of the cylinder (5) is hingedly connected to the support block (37); a double-headed cylinder (35) is fixedly installed on the side wall of the pipe (3) above the support block (37); two piston rod ends of the double-headed cylinder (35) are respectively fixedly connected to brackets (36); clamping blocks (38) are fixedly connected to the brackets (36); a limiting groove (401) is provided on the fixing ring (4); and an arc-shaped clamping plate is provided at one end of the clamping block (38) located inside the limiting groove (401).

2. A punching device for mechanical processing parts according to claim 1, characterized in that: The connecting plate (11) is located at one end of the housing (1) and is fixedly connected to a rack 1 (30). The inner wall of the housing (1) is rotatably connected to a rotating shaft (29). Two gears (25) are fixedly connected to the rotating shaft (29). The gear (25) on the side away from the support tube (9) is meshedly connected to the rack 1 (30), and the other gear (25) is meshedly connected to the rack 2 (202).

3. A punching device for mechanical processing parts according to claim 2, characterized in that: A long plate (33) is also fixedly connected to the inner wall of the shell (1); a lower end of one side of the baffle (20) located inside the shell (1) is fixedly connected to a fixed plate (31); a guide column (41) is fixedly connected to the side wall of the fixed plate (31); an end of the guide column (41) away from the fixed plate (31) is slidably connected to the long plate (33); a second spring (32) is sleeved on the outer wall of the guide column (41); and the second spring (32) is fixedly connected between the long plate (33) and the fixed plate (31).

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