High-precision punching machine with replaceable punching needle bottom die

Abstract

The invention discloses a high-precision punching machine capable of replacing a punching needle bottom die, which belongs to the technical field of high-precision punching machines, and is provided with a punching machine frame body, and a punch positioning assembly and a base limiting assembly which are assembled on the inner surface of the punching machine frame body; comprising a limiting block installed on the inner surface of the punch positioning assembly. According to the high-precision punching machine with the replaceable punching needle bottom die, the punching machine frame body capable of being assembled in a positioning mode, the punch positioning assembly capable of being assembled in a matched mode and the base limiting assembly are arranged for use, the punch body and the bottom die body are detachably assembled in a limiting mode, different styles are assembled, the assembling and clamping stability is improved, and the punching efficiency is improved. And in the punching process, through cooperation of an air cavity and an air pressure plate assembled by an air rod, air in the air cavity is promoted to be conveyed to an air blowing pipe, negative pressure is formed at the bottom of a discharging hole, waste chips can be conveniently discharged, and through use of a smoothing roller, wrinkles on the surface of the material during punching are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-precision puncher, in particular to a high-precision puncher with replaceable punch bottom die. BACKGROUND

[0002] The high-precision puncher can be used for punching the display hanging hole of a small food packaging bag during production. The puncher can effectively punch according to the use style through a pneumatic puncher. The puncher mainly comprises a cylinder, a punch and a bottom die, and has a relatively simple structure, which is convenient for maintenance and maintenance. However, it is inconvenient to control the stability of the punching position during use, and the position is easy to deviate. Moreover, it is inconvenient to replace the punch and the bottom die.

[0003] In order to overcome the above-mentioned defects, the prior art (application number CN201611212291.6, application date 2016-12-25 Chinese patent application) plastic bag puncher, through the inflation amount change between the inflation bag and the inflation pad, the knife distance of the punch knife can be changed, so as to uniformly punch the larger and wider plastic bag, and the extension width of the spring sheet follows the change of the knife distance, prevents the punch knife from extending out of the extension width range of the spring sheet, and cannot contact the spring sheet during punching, so as to only push the plastic bag downward, and cannot punch the plastic bag. In addition, through the pushing of the punch knife by the spring sheet, the punch knife is retracted into the cooling bag for cooling, so as to ensure the punching effect and improve the processing quality of the plastic bag. At the same time, the rotation of the feeding roller makes the cooling fan work, and the cooling liquid is cooled, which not only ensures the cooling effect of the cooling liquid on the punch knife, but also reduces the energy consumption of the system; there is also prior art (application number CN201920621276.X, application date 2019-04-30 Chinese patent application) a plastic bag puncher, the motor is started, driving the rotating rod to rotate, the rotating rod drives the driving gear to rotate, the driving gear drives the rotating cylinder to rotate, the rotating cylinder rotates, the threaded rod moves up and down, the threaded rod moves downward, which drives the pressing sheet to move downward, so that the pressing sheet can press the plastic bag to be processed on the upper end face of the workbench, facilitating the processing of the plastic bag, the threaded rod also drives the push block to move downward, so that the push block can push the sliding block to move downward, the sliding block drives the punch knife to move downward, and the lower end of the punch knife penetrates the small hole and the through hole; and prior art (application number CN202121407907.1, application date 2021-06-24 Chinese patent application) a puncher for producing plastic bags, by setting a connecting plate on the push rod, the first connecting rod and the second connecting rod are driven by the push rod to fix the plastic bag on the puncher body, so that the puncher not only uses air flow to adsorb the plastic bag during punching, but also uses the annular pressing sheet to fix the plastic bag, ensuring the position stability of the plastic bag, and ensuring the processing accuracy; although the prior art can complete the punching, but during the working process, it is not convenient to quickly position and assemble the punch and the bottom die for use, which affects the working efficiency of the product hole after the sample is changed, and the waste debris punched is easy to block, which affects the punching effect, and it is not convenient to smooth the material during punching.

[0004] In view of the above problems, it is urgent to make innovative design on the basis of the original high-precision puncher. SUMMARY

[0005] The present application aims to provide a high-precision puncher with replaceable punch bottom die to solve the problem of inconvenient quick positioning and assembling of the punch and the bottom die during work, which affects the work efficiency after the product hole pattern is changed, and the waste debris is easy to block, which affects the punching effect, and it is inconvenient to smooth the material during punching.

[0006] To achieve the above object, the present application provides the following technical scheme: a high-precision puncher with replaceable punch bottom die is provided with a puncher frame body, a punch positioning assembly and a base limiting assembly assembled on the inner surface of the puncher frame body; it comprises: a limiting block installed on the inner surface of the punch positioning assembly, the punch positioning assembly is connected with a punch body through the limiting block, the punch body is assembled on the punch positioning assembly through a limiting clamping mechanism, and the inner surface of the punch body is provided with a limiting hole; a limiting seat is installed on the upper surface of the base limiting assembly, the base limiting assembly is limitedly assembled with a base body through the limiting seat, which is used to control the position of the base body, and the base limiting assembly is assembled with the base body through a positioning penetrating mechanism, which is used to control the quick replacement and assembly of the base body, and the inner surface of the base body is provided with a discharge hole and a positioning hole for discharging and positioning.

[0007] Preferably, the punch positioning assembly and the punch body form a limiting nested structure through the limiting block, and the limiting hole is provided at an equal angle with respect to the inner surface of the punch body.

[0008] Preferably, the limiting clamping mechanism further comprises a push rod one connected with the punch positioning assembly through sliding, a return spring one elastically connected between the push rod one and the punch positioning assembly, a connecting rod one rotatably connected to the end of the outer surface of the push rod one, a rotating disc rotatably connected to the end of the connecting rod one, and the rotating disc is positioned and rotated in the punch positioning assembly.

[0009] Preferably, the punch positioning assembly and the push rod one form an elastic sliding structure through the return spring one, and the push rod one forms an extrusion rotating structure with the connecting rod one, the eccentric shaft and the rotating disc.

[0010] Preferably, the outer surface of the rotating disc is rotatably connected with a connecting rod two through an eccentric shaft, the outer surface end of the connecting rod two is rotatably connected with a limiting piece, the limiting piece and the punch positioning assembly are elastically connected with a return spring one, the limiting piece is positioned and clamped in the inner surface of the punch body through the limiting hole; the rotating disc, the eccentric shaft, the connecting rod two and the limiting piece form a circular linear movement structure, the limiting piece forms an elastic sliding structure with the punch positioning assembly through the return spring one, and the limiting piece forms a limiting clamping structure with the punch body through the limiting hole.

[0011] Preferably, the base limiting assembly and the limiting seat form a threaded assembly structure, and the limiting seat and the base body form a nested limiting structure, and the base body is provided with a discharging hole corresponding to the hole of the base limiting assembly.

[0012] Preferably, the positioning penetrating mechanism further comprises a push rod two slidingly connected to the inner surface of the base limiting assembly, and the outer surface end of the push rod two is provided with an extrusion plate and an extrusion block, and a reset spring two is elastically connected between the extrusion plate and the base limiting assembly, and the reset spring two penetrates the outer surface of the push rod two, and the inner surface of the extrusion block is slidingly connected with a positioning column, and the positioning column is penetratingly limited in the positioning hole of the base body.

[0013] Preferably, the base limiting assembly, the push rod two, the extrusion plate and the extrusion block form an integrated structure, and the extrusion block and the positioning column form an extrusion sliding structure, and the positioning column and the base limiting assembly form a penetrating structure, and the positioning column and the base body form a limiting penetrating structure through the positioning hole.

[0014] Preferably, the baffle is assembled on the outer surface of the punch frame body, the inner surface of the baffle is provided with an air cavity, the inner surface of the air cavity is telescopically connected with an air pressure plate and an air rod, the top of the air rod is mounted on the outer surface of the punch positioning assembly, the lower surface of the air cavity is provided with an air pipe, the outer surface end of the air pipe is provided with a communication pipe and a blowing pipe, and the communication pipe and the blowing pipe are nested in the inside of the base limiting assembly; the punch frame body, the baffle and the air cavity form an integrated structure, the air cavity and the punch positioning assembly form an air cylinder structure through the air pressure plate and the air rod, the air cavity, the air pipe, the communication pipe and the blowing pipe form an air passage structure, and the blowing pipe and the base limiting assembly form a negative pressure chip removal structure.

[0015] Preferably, the smoothing assembly is rotationally connected to the lower surface of the punch positioning assembly, the inner surface of the lower side of the smoothing assembly is rotationally connected with a smoothing roller, the lower surface of the punch positioning assembly is rotationally connected with a telescopic assembly, the inner surface of the telescopic assembly is telescopically connected with a telescopic rod, an extrusion spring is elastically connected between the telescopic rod and the telescopic assembly, and the lower surface of the telescopic rod is connected to the side surface of the smoothing assembly; the punch positioning assembly and the smoothing assembly form a rotating structure, the smoothing assembly and the smoothing roller form a rotating structure, and the punch positioning assembly, the telescopic assembly, the telescopic rod and the extrusion spring form an elastic rotating structure with the smoothing assembly.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1. The replaceable punch needle bottom die high-precision puncher, the puncher frame body is positioned and assembled, the punch head positioning assembly and the base limiting component are assembled and used, the punch head body and the bottom die body are respectively detachably limited and assembled, different styles are assembled, the stability of assembly clamping is improved, in the punching process, the air pressure plate assembled by the air cavity and the air rod is matched, the gas in the air cavity is delivered to the air blowing pipe, the negative pressure is formed at the bottom of the discharge hole, the waste is discharged, the wrinkle on the surface of the material is reduced by the use of the smoothing roller, the weight of the device is reduced by the hollow setting of the shell outside the puncher frame body, and the use stability is improved.

[0018] 2. The replaceable punch needle bottom die high-precision puncher, the limiting clamping mechanism is arranged, the limiting piece assembled by the punch head positioning assembly is used, the punch head body is limited and clamped when the punch head body is assembled, the limiting piece is unlocked and used by the connecting rod two of the rotating disc when the punch head body is replaced, and the limiting piece is used in the limiting position of the punch head body; further, the positioning penetrating mechanism is assembled by the base limiting component and the limiting seat, the base body is nested and assembled, the positioning column is controlled to be extruded and adjusted, and the positioning column is controlled to penetrate and limit the base body after the base body is nested.

[0019] 3. The replaceable punch needle bottom die high-precision puncher, the baffle for protection is arranged, the air cavity is assembled on the inner surface, the air rod and the air pressure plate installed with the punch head positioning assembly are matched, the gas in the air cavity is delivered to the air blowing pipe, and the negative pressure adsorption is used when the base body discharges the waste, and the waste discharge effect is improved; further, the smoothing mechanism assembled at the bottom of the punch head positioning assembly can effectively cooperate with the rotating smoothing roller to roll, extrude and smooth the edge of the material to be punched after contacting the material to be punched, control the flatness of the material, and avoid misplacement caused by material wrinkles at the punching position. DETAILED DESCRIPTION

[0020] Figure 1 It is a three-dimensional structure schematic view of the puncher frame body of the application;

[0021] Figure 2 It is a three-dimensional structure schematic view of the puncher frame body of the application;

[0022] Figure 3 It is a three-dimensional structure schematic view of the punch head positioning assembly of the application;

[0023] Figure 4 It is a three-dimensional structure schematic view of the punch head positioning assembly of the application;

[0024] Figure 5 It is a partial cross-sectional view of the base limiting component of the application;

[0025] Figure 6 It is a schematic diagram of the extrusion block of the application;

[0026] Figure 7 It is a schematic diagram of the blowing pipe of the application;

[0027] Figure 8 It is a schematic diagram of the smoothing component of the application.

[0028] In the figure: 1, punch frame body; 2, punch positioning component; 3, limiting block; 4, punch body; 5, limiting hole; 6, push rod one; 7, return spring one; 8, connecting rod one; 9, rotating disc; 10, connecting rod two; 11, limiting piece; 12, base limiting component; 13, limiting seat; 14, base body; 15, discharge hole; 16, positioning hole; 17, push rod two; 18, extrusion plate; 19, extrusion block; 20, return spring two; 21, nested block; 22, positioning column; 23, baffle; 24, air cavity; 25, air pressure plate; 26, air rod; 27, air pipe; 28, communication pipe; 29, blowing pipe; 30, smoothing component; 31, smoothing roller; 32, telescopic component; 33, telescopic rod; 34, extrusion spring. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0030] Please refer to Figures 1-8 The application provides a technical solution: a high-precision puncher with replaceable punch pin bottom die, which is provided with a punch frame body 1 and a punch positioning component 2 and a base limiting component 12 assembled on the inner surface of the punch frame body 1.

[0031] Embodiment one: as Figures 1-6 shown in the technical solution, the application provides the following technical solution: a high-precision puncher with replaceable punch pin bottom die, which discloses: comprising: a limiting block 3 installed on the inner surface of a punch positioning component 2, and the punch positioning component 2 is connected with a punch body 4 through the limiting block 3, and the punch body 4 is assembled on the punch positioning component 2 through a limiting clamping mechanism, and the inner surface of the punch body 4 is provided with a limiting hole 5; as Figure 5 and Figure 6As shown, the limiting seat 13 is installed on the upper surface of the base limiting assembly 12, and the base limiting assembly 12 is assembled with the base body 14 by the limiting seat 13, which is used to control the position of the base body 14. The base limiting assembly 12 is also assembled with the base body 14 through a positioning and through-mechanism, which is used to control the quick replacement and assembly of the base body 14. Meanwhile, the inner surface of the base body 14 has a discharge hole 15 and a positioning hole 16 for chip removal and positioning. Figure 3 and Figure 4 As shown, the punch positioning assembly 2 forms a limiting nested structure with the punch body 4 through the limiting block 3, and the limiting hole 5 is opened at an equal angle with respect to the inner surface of the punch body 4; as Figure 5 and Figure 6 As shown, the base limiting component 12 and the limiting seat 13 form a threaded assembly structure, and the limiting seat 13 and the base body 14 form a nested limiting structure. The base body 14 has a discharge hole 15 that corresponds to the hole of the base limiting component 12.

[0032] In use, the punching machine frame 1 is positioned and assembled in the corresponding working position, and the punch positioning component 2 is assembled in conjunction with it. The punch body 4 is nested and assembled by the limiting block 3 assembled on the inner surface of the punch positioning component 2. The limiting locking mechanism set on the inner surface of the punch positioning component 2 limits and locks the punch body 4 inside the punch positioning component 2. This can prevent the punch body 4 from self-positioning and rotating during operation, and also prevent the punch body 4 from falling off. The base limiting component 12 and the limiting seat 13 assembled in conjunction with the punching machine frame 1 can limit the position of the nested assembly of the base body 14 in the gap between the limiting seat 13 and the base limiting component 12. The positioning hole 16 opened in the base body 14 can be used to press and adjust the positioning column 22 of the base limiting component 12 to pass through the base body 14, which is convenient for controlling the positioning stability of the base body 14 and preventing the base body 14 from being misaligned or tilted during the punching process. The hollow design of the outer shell of the punching machine frame 1 reduces the weight of the device and improves the stability of use.

[0033] Example 2: Figures 2-6 The technical solution shown, based on Embodiment 1, further discloses the stability of the assembly of the punch body 4 and the base body 14, preventing deflection or detachment during operation. It also increases the convenience of replacement assembly according to the changing drilling pattern, solving the problem of inconvenient and quick replacement of the punch body 4 and the base body 14. The specific details are as follows: The limiting and engaging mechanism also includes a push rod 6 slidably connected to the inner surface of the punch positioning assembly 2, and a return spring 7 elastically connected between the push rod 6 and the punch positioning assembly 2. A connecting rod 8 is rotatably connected to the outer end of the push rod 6, and a turntable 9 is rotatably connected to the end of the connecting rod 8, positioning and rotating the turntable 9 inside the punch positioning assembly 2; Figure 3As shown, the punch positioning assembly 2 is in elastic sliding structure with the push rod 1 through the reset spring 7, and the push rod 1 is in extrusion rotation structure with the connecting rod 1 and the eccentric shaft and the rotating disc 9; as Figure 4 As shown, the outer surface of the rotating disc 9 is rotatably connected with the connecting rod 2 through the eccentric shaft, the outer surface end of the connecting rod 2 is rotatably connected with the limiting piece 11, and the limiting piece 11 is elastically connected with the punch positioning assembly 2 through the reset spring 7, and the limiting piece 11 is positioned and clamped in the inner surface of the punch body 4 through the limiting hole 5; the rotating disc 9 is in circumferential linear movement structure with the limiting piece 11 through the eccentric shaft and the connecting rod 2, and the limiting piece 11 is in elastic sliding structure with the punch positioning assembly 2 through the reset spring 7, and the limiting piece 11 is in limiting clamping structure with the punch body 4 through the limiting hole 5; as Figure 5 As shown, the positioning through mechanism further comprises a push rod 2 17 slidably connected to the inner surface of the base limiting assembly 12, and the outer surface end of the push rod 2 17 is provided with an extrusion plate 18 and an extrusion block 19, and the extrusion plate 18 is elastically connected with the base limiting assembly 12 through the reset spring 2 0, and the reset spring 2 0 is penetrated through the outer surface of the push rod 2 17, and the inner surface of the extrusion block 19 is slidably connected with a positioning column 22, and the positioning column 22 is penetrated and limited in the positioning hole 16 of the base body 14; as Figure 6 As shown, the base limiting assembly 12 is in elastic extension structure with the push rod 2 17 through the reset spring 2 0 and the extrusion plate 18, and the push rod 2 17 is in integrated structure with the extrusion plate 18 and the extrusion block 19, and the extrusion block 19 is in extrusion sliding structure with the positioning column 22, and the positioning column 22 is in penetrating structure with the base limiting assembly 12, and the positioning column 22 is in limiting penetrating structure with the base body 14 through the positioning hole 16.

[0034] When the punch body 4 needs to be replaced, the manual control push rod one 6 is pulled outwards in the punch positioning assembly 2, causing the push rod one 6 to contract the connected reset spring one 7 in the punch positioning assembly 2, and through the sliding of the push rod one 6, the outer surface end rotating assembly link one 8 is driven, the rotating center rotating disc 9 is positioned and rotated, and through the assembly of the eccentric shaft on the other side of the rotating disc 9, the limit piece 11 assembled by the link two 10 is relatively expanded and slides in the punch positioning assembly 2, and another set of reset spring one 7 between the limit piece 11 and the punch positioning assembly 2 is contracted, so that the limit piece 11 is separated from the limiting hole 5 opened in the punch body 4, and the punch body 4 is in a limiting state, so that the punch body 4 is quickly removed from the punch positioning assembly 2, and a new punch body 4 is replaced, and then the new punch body 4 is assembled at the inner surface bottom of the punch positioning assembly 2, and the push rod one 6 is loosened, and the elasticity of the reset spring one 7 drives the limit piece 11 to limit and engage the punch body 4, improving the stability of the assembly of the punch body 4; and when the base body 14 needs to be replaced, the push rod two 17 sliding in the base limiting assembly 12 is manually extruded, the installed extrusion plate 18 extrudes the connected reset spring two 20, causing the reset spring two 20 to contract, and the nested block 21 assembled by the extrusion plate 18 is obliquely slidingly extruded and positioned in the base limiting assembly 12 to move downwards, so that the positioning column 22 with a cylindrical top is separated from the positioning hole 16 opened in the base body 14, so that the base body 14 is removed, a new base body 14 is replaced, and the base body 14 is nested and assembled in the gap between the base limiting assembly 12 and the limiting seat 13, and the push rod two 17 is loosened, and the reset spring two 20 is elastically pushed to reset the push rod two 17 installed by the extrusion plate 18, and the nested block 21 is nested and obliquely slidingly moved upwards through the positioning hole 16 opened in the base body 14, improving the stability of the assembly of the base body 14, and reducing the problem of misalignment when the base body 14 is punched by up and down force.

[0035] Embodiment three: as Figure 7 and Figure 8The technical scheme shown, on the basis of embodiment two, further discloses that when the punching work is performed, the waste chips can be subjected to negative pressure adsorption and discharge for use, and the flatness of the material punching position is improved by the anti-wrinkling assembly, the use effect is increased, and the problems of inconvenient chip removal and material flattening are solved. The specific content is as follows: the baffle 23 is assembled on the outer surface of the punching machine frame body 1, the inner surface of the baffle 23 is provided with the air cavity 24, the inner surface of the air cavity 24 is telescopically connected with the air pressure plate 25 and the air rod 26, the top of the air rod 26 is mounted on the outer surface of the punch positioning assembly 2, the lower surface of the air cavity 24 is provided with the air pipe 27, the outer surface end of the air pipe 27 is provided with the communication pipe 28 and the air blowing pipe 29, and the communication pipe 28 and the air blowing pipe 29 are nested in the inside of the base limiting assembly 12; the punching machine frame body 1, the baffle 23 and the air cavity 24 constitute an integrated structure, the air cavity 24 constitutes an air cylinder structure with the punch positioning assembly 2 through the air pressure plate 25 and the air rod 26, and the air cavity 24 constitutes an air passage structure with the air pipe 27, the communication pipe 28 and the air blowing pipe 29, and the air blowing pipe 29 constitutes a negative pressure chip removal structure with the base limiting assembly 12; as Figure 8 As shown, the flattening assembly 30 is rotatably connected to the lower surface of the punch positioning assembly 2, the inner surface of the flattening assembly 30 is rotatably connected with the flattening roller 31 on the lower side, the punch positioning assembly 2 is rotatably connected with the telescopic assembly 32 on the lower surface, the inner surface of the telescopic assembly 32 is telescopically connected with the telescopic rod 33, the telescopic rod 33 and the telescopic assembly 32 are elastically connected with the extrusion spring 34, and the lower surface of the telescopic rod 33 is connected to the side surface of the flattening assembly 30; the punch positioning assembly 2 and the flattening assembly 30 constitute a rotating structure, the flattening assembly 30 and the flattening roller 31 constitute a rotating structure, and the punch positioning assembly 2 and the flattening assembly 30 constitute an elastic rotating structure through the telescopic assembly 32, the telescopic rod 33 and the extrusion spring 34.

[0036] When the material is punched, the punch positioning assembly 2 assembled on the punch frame body 1 drives the air rod 26 installed on the side of the punch positioning assembly 2 to control the air pressure plate 25 to shrink in the air cavity 24, and the air cavity 24 is positioned and installed on the baffle 23 assembled on the punch frame body 1, used for positioning, and when the gas in the air cavity 24 is extruded, it will be delivered to the blowing pipe 29 assembled on the connecting pipe 28 through the air pipe 27 with a one-way valve at the bottom, so that the bottom hole of the base limiting assembly 12 is inclined downward, and the negative pressure adsorption is used on the material hole 15 opened on the base body 14, the waste generated by punching is discharged, and when the punch positioning assembly 2 moves down, the flattening roller 31 assembled on the flattening assembly 30 contacts the material, and the flattening roller 31 is controlled to expand after the contact by the rotation of the damping between the flattening roller 31 and the flattening assembly 30, and the flattening roller 31 can be rotated after expansion, and in the case of not continuously moving down, the telescopic rod 33 connected to the flattening assembly 30 is retracted in the telescopic assembly 32, that is, the extrusion spring 34 between the two is extruded to retract, and the telescopic assembly 32 is positioned and rotated at the side of the bottom of the punch positioning assembly 2, so as to control the flattening assembly 30 to continuously expand, and after the punch body 4 completes the punching, the telescopic assembly 32 and the telescopic rod 33 are nested and slid between them, and the extrusion spring 34 between them is expanded, the flattening assembly 30 is controlled to reset for use, and is used for the next punching and flattening.

[0037] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0038] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-precision puncher with replaceable punch bottom die, comprising a puncher frame body (1), a punch positioning assembly (2) and a base limiting assembly (12) assembled on the inner surface of the puncher frame body (1). characterized in that The punch positioning assembly (2) is connected with a punch body (4) through a limiting block (3) installed on the inner surface of the punch positioning assembly (2), and the punch body (4) is assembled on the punch positioning assembly (2) through a limiting clamping mechanism, and the inner surface of the punch body (4) is provided with a limiting hole (5). The base limiting assembly (12) is connected with a base body (14) through a limiting seat (13) installed on the upper surface of the base limiting assembly (12), which is used to control the position of the base body (14), and the base limiting assembly (12) is connected with the base body (14) through a positioning penetrating mechanism, which is used to control the quick replacement assembly of the base body (14), and the inner surface of the base body (14) is provided with a discharge hole (15) and a positioning hole (16) for chip removal and positioning. The punch positioning assembly (2) and the punch body (4) form a limiting nested structure through the limiting block (3), and the limiting hole (5) is provided on the inner surface of the punch body (4) at an equal angle.

2. The high-precision puncher with replaceable punch-pin base mold according to claim 1, characterized in that: The limiting clamping mechanism further comprises a push rod I (6) slidingly connected to the inner surface of the punch positioning assembly (2), and a reset spring I (7) elastically connected between the push rod I (6) and the punch positioning assembly (2), and a connecting rod I (8) rotatably connected to the end of the outer surface of the push rod I (6), and a rotating disc (9) rotatably connected to the end of the connecting rod I (8) and positioned in the punch positioning assembly (2).

3. The high-precision puncher with replaceable punch-pin base mold according to claim 1, characterized in that: The punch positioning assembly (2) and the push rod I (6) form an elastic sliding structure through the reset spring I (7), and the push rod I (6) and the rotating disc (9) form an extrusion rotating structure through the connecting rod I (8) and the eccentric shaft.

4. The high-precision puncher with replaceable punch-pin base mold according to claim 3, characterized in that: The outer surface of the rotating disc (9) is rotatably connected with a connecting rod II (10) through an eccentric shaft, and the end of the outer surface of the connecting rod II (10) is rotatably connected with a limiting piece (11), and the limiting piece (11) and the punch positioning assembly (2) are elastically connected with a reset spring I (7), and the limiting piece (11) is positioned and clamped in the inner surface of the punch body (4) through the limiting hole (5); the rotating disc (9), the limiting piece (11) and the connecting rod II (10) form a circular linear movement structure, the limiting piece (11) and the punch positioning assembly (2) form an elastic sliding structure through the reset spring I (7), and the limiting piece (11) and the punch body (4) form a limiting clamping structure through the limiting hole (5).

5. The high-precision puncher with replaceable punch-pin base mold according to claim 3, characterized in that: The base limiting assembly (12) and the limiting seat (13) form a threaded assembly structure, the limiting seat (13) and the base body (14) form a nested limiting structure, and the base body (14) is provided with a discharge hole (15) corresponding to the hole of the base limiting assembly (12).

6. The high-precision puncher with replaceable punch-pin base mold according to claim 1, characterized in that: ​ 7. The high-precision puncher with replaceable punch-pin base mold according to claim 1, characterized in that: The positioning mechanism further comprises a push rod two (17) slidingly connected to the inner surface of the base limiting assembly (12), and the outer surface end of the push rod two (17) is provided with an extrusion plate (18) and an extrusion block (19), and the extrusion plate (18) is elastically connected with the base limiting assembly (12) through a reset spring two (20), and the reset spring two (20) is penetrated through the outer surface of the push rod two (17), and the inner surface of the extrusion block (19) is slidingly connected with a positioning column (22), and the positioning column (22) is penetrated and limited in the positioning hole (16) of the base body (14).

8. The high-precision puncher with replaceable punch-pin base mold according to claim 7, characterized in that: The base limiting assembly (12) is elastically telescopic through the reset spring two (20) and the extrusion plate (18) and the push rod two (17), and the push rod two (17) and the extrusion plate (18) and the extrusion block (19) form an integrated structure, and the extrusion block (19) and the positioning column (22) form an extrusion sliding structure, and the positioning column (22) and the base limiting assembly (12) form a penetrating structure, and the positioning column (22) and the base body (14) form a limiting penetrating structure through the positioning hole (16).

9. The high-precision puncher with replaceable punch-pin base mold according to claim 1, characterized in that: Further comprising the baffle (23) assembled on the outer surface of the puncher frame body (1), and the inner surface of the baffle (23) is provided with an air cavity (24), and the inner surface of the air cavity (24) is telescopically connected with an air pressure plate (25) and an air rod (26), and the top of the air rod (26) is mounted on the outer surface of the punch positioning assembly (2), and the lower surface of the air cavity (24) is provided with an air pipe (27), and the outer surface end of the air pipe (27) is provided with a communication pipe (28) and a blowing pipe (29), and the communication pipe (28) and the blowing pipe (29) are nested in the inside of the base limiting assembly (12); the puncher frame body (1) and the baffle (23) and the air cavity (24) form an integrated structure, and the air cavity (24) forms an air cylinder structure with the punch positioning assembly (2) through the air pressure plate (25) and the air rod (26), and the air cavity (24) forms an air ventilation structure with the air pipe (27), the communication pipe (28) and the blowing pipe (29), and the blowing pipe (29) forms a negative pressure chip removal structure with the base limiting assembly (12).

10. The high-precision puncher with replaceable punch-pin base mold according to claim 1, characterized in that: Further comprising the smoothing assembly (30) rotationally connected to the lower surface of the punch positioning assembly (2), and the inner surface of the smoothing assembly (30) is rotationally connected with a smoothing roller (31), and the lower surface of the punch positioning assembly (2) is rotationally connected with a telescopic assembly (32), and the inner surface of the telescopic assembly (32) is telescopically connected with a telescopic rod (33), and the telescopic rod (33) and the telescopic assembly (32) are elastically connected with an extrusion spring (34), and the lower surface of the telescopic rod (33) is connected to the side of the smoothing assembly (30); the punch positioning assembly (2) and the smoothing assembly (30) form a rotating structure, and the smoothing assembly (30) and the smoothing roller (31) form a rotating structure, and the punch positioning assembly (2) and the smoothing assembly (30) form an elastic rotating structure through the telescopic assembly (32), the telescopic rod (33) and the extrusion spring (34).

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