CN213052317U

CN213052317U - Straight pipe four-direction multi-hole punching machine

Info

Publication number: CN213052317U
Application number: CN202021866408.4U
Authority: CN
Inventors: 王炳; 万再荣; 胡江
Original assignee: Taizhou Luqiao Pioneer Automation Equipment Co ltd
Current assignee: Zhejiang Xianchuang Intelligent Equipment Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-04-27
Anticipated expiration: 2030-08-31

Abstract

The utility model discloses a straight pipe four-direction multi-hole punching machine, belonging to the technical field of punching machines, comprising a frame, wherein a punching frame is arranged on the frame, a mould shell is fixedly arranged in the punching frame, a front and a back through mould holes are arranged in the mould shell, and a punching device, a positioning device and a blanking device are arranged on the punching frame; the positioning device comprises a die sleeve seat arranged at the rear side of the die shell and a die sleeve column which is arranged in the center of the die sleeve seat and extends into the die hole for sleeving the workpiece, and the die sleeve column is connected with the die sleeve seat and integrally formed; the blanking device comprises a pushing sleeve sleeved outside the die sleeve column, at least one connecting flap connected with the outer side of the pushing sleeve, a channel communicated with a die hole and matched with the connecting flap in size and arranged in the die shell, a connecting rod arranged at the rear side of the connecting flap, a fixed disk connected with the rear end of the connecting rod and a blanking cylinder driving the fixed disk to reciprocate, wherein the blanking cylinder is fixedly arranged on the frame, and the effects of high automation degree, capability of avoiding deformation of a workpiece in a punching process, compact integral structure and good scrap clearing effect are achieved.

Description

Straight pipe four-direction multi-hole punching machine

Technical Field

The utility model relates to a piercing press field especially relates to a porous piercing press of straight tube four directions.

Background

The muffler pipe is an important component part of the muffler. When the silencing pipe is machined in the early industry, an original flat plate is punched, then the silencing pipe is bent and welded to be in a tubular shape, the process is complex, and after welding, the welded part needs to be polished to ensure the smoothness of the pipe surface of the silencing pipe, so that the working procedures are complex and the production efficiency is low.

With the development of science and technology, at present, the mode of directly punching a tubular workpiece is mostly adopted in the industry to manufacture the silencing pipe, and the method comprises the following steps: the workpiece is sent into the workpiece punching mould shell for punching, the working procedure is simple, and the production efficiency is high. Although the method realizes the purpose of directly punching the workpiece, the hollow workpiece is difficult to position, the workpiece is deformed due to overlarge clamping force in the punching process, and the workpiece is also deformed due to the punching force in the punching process, so that the product quality is influenced.

In addition, after the workpiece is punched, some workpieces are taken down in a handheld mode, so that the efficiency is low, and the labor intensity of workers is high and the automation degree is low due to the manual handheld mode; the workpiece is taken down by adopting a manipulator clamping mode in some modes, and the manipulator is additionally arranged, so that the equipment cost is increased, and the occupied area of the equipment is larger; in addition, there is also a case where an ejector is added to a punching machine and a workpiece is removed by ejecting the workpiece by the ejector, but the ejector and the punching machine are not compact enough in structural matching, resulting in a large volume of the punching machine.

In addition, the work piece can be along with a large amount of pieces when punching a hole and produce, and these pieces pile up easily in work piece punching die shell, and at present, the trade is adopted in the work piece punching die shell and is add the air cock for blow off the piece, nevertheless because the piece fails to concentrate through any device, the piece distributes and is more dispersed, so the piece often can not all be blown off, and then can influence subsequent punching press, so for a long time, still can cause the damage of work piece punching die shell.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's weak point, solve the technical problem in the correlation technique to a certain extent at least, provide a porous piercing press in straight tube four positions to reach degree of automation height, can avoid the work piece to warp, machining efficiency is high, overall structure is compact, the effectual purpose of scurf cleaning in the punching process.

In order to solve the technical problem, the technical scheme of the utility model is that: a straight pipe four-direction multi-hole punching machine comprises a rack, wherein a punching frame is arranged on the rack, a formwork is fixedly arranged in the punching frame, a front-back through die hole is formed in the formwork, and a punching device, a positioning device and a blanking device are arranged on the punching frame; the positioning device comprises a die sleeve seat arranged at the rear side of the die shell and a die sleeve column which is arranged in the center of the die sleeve seat and extends into the die hole for sleeving a workpiece, and the die sleeve column is connected with the die sleeve seat and integrally formed; the blanking device comprises a push sleeve sleeved outside the die sleeve column, at least one connecting flap connected with the outer side of the push sleeve, a channel communicated with a die hole and matched with the connecting flap in size, a connecting rod arranged at the rear side of the connecting flap, a fixed disc connected with the rear end of the connecting rod and a blanking cylinder driving the fixed disc to reciprocate, wherein the channel is arranged in the die shell, and the blanking cylinder is fixedly arranged on the frame.

Preferably, the punching device comprises four punching assemblies which are arranged on the punching frame and are respectively positioned on four sides of the die sleeve column, each punching assembly comprises a punching seat arranged in the punching frame, an oil cylinder which is arranged on the punching frame and drives the punching seat to reciprocate, and a plurality of punching columns which are arranged on the punching seats, through holes for the punching columns to extend into are arranged on the four sides of the die shell, and positioning holes for the punching columns to extend into and correspond to the through holes are arranged on the four sides of the die sleeve column; the punching frame is also provided with a chip blowing device, the chip blowing device comprises a chip storage hole, an air pipe and an air pump, the chip storage hole is formed in the axial center of the die sleeve column and communicated with the positioning hole, and the rear end of the chip storage hole is connected with the air pump through the air pipe.

Preferably, the number of the connecting petals is four, the four connecting petals are uniformly distributed on the outer side of the push sleeve, and the four connecting rods are parallel to each other.

Preferably, when the punching column reaches the maximum stroke, the punching column penetrates through the positioning hole and partially extends into the scrap storage hole.

Preferably, the diameter of the punching column, the diameter of the positioning hole and the diameter of the through hole are the same.

Preferably, the feeding device is arranged on the rack and comprises a base arranged on the rack, a linear rail arranged on the base, a feeding seat arranged on the linear rail and a moving cylinder driving the feeding seat to reciprocate, the moving cylinder is fixedly arranged on the base, a holding tank for holding a workpiece is arranged on the right side of the feeding seat, a column head for pushing the workpiece to enter a die hole and enabling the workpiece to be sleeved on a sleeve die column is arranged in the holding tank, the column head is connected with the feeding cylinder, and the feeding cylinder is fixedly arranged on the feeding seat.

Preferably, still be equipped with blevile of push in the frame, blevile of push includes the feeder hopper, the feeder hopper is located the top of pay-off seat, be equipped with the movable plate in the feeder hopper, be formed with the double-layered chamber that makes the work piece neatly put between one side of movable plate and feeder hopper, the opposite side of feeder hopper is worn to be equipped with the regulation pole of adjusting the movable plate position and then adjusting double-layered chamber size, the one end of adjusting the pole with movable plate fixed connection, the other end is equipped with the head.

Preferably, be equipped with in the holding tank and adjust the seat, be equipped with waist shape mounting hole on adjusting the seat, it passes waist shape mounting hole through the bolt and installs in the holding tank to adjust the seat.

Preferably, a discharge hopper is installed on the machine frame, and a material collecting basket is placed below the discharge hopper.

Preferably, the front end of the die sleeve column is provided with a chamfer.

The utility model discloses technical effect mainly embodies in following aspect: the invention realizes the integrated automation of the workpiece punching processing procedure, can automatically feed, punch and discharge, avoids manual operation accidents, reduces the labor intensity of personnel, can carry out four-direction multi-hole processing on the workpiece, has uniform workpiece punching and high processing efficiency, simultaneously avoids the deformation of the workpiece in the punching process, ensures the product quality, and has compact structure, reasonable design and less occupied space of equipment; the chip cleaning effect is good, and the service life of the equipment is longer.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a punching frame according to the present invention;

FIG. 3 is a schematic view of a formwork arrangement of the present invention;

FIG. 4 is a schematic structural diagram of a positioning device according to the present invention;

FIG. 5 is a schematic view of a first perspective of the formwork and positioning device assembly of the present invention;

FIG. 6 is a schematic view of a second perspective of the formwork and positioning device assembly of the present invention;

FIG. 7 is a schematic view of the structure of the assembly of the punching frame, the die shell, the punching device, the positioning device, the blanking device and the chip blowing device of the invention;

FIG. 8 is a schematic view of the structure of the positioning device, the push sleeve, the connecting flap, the connecting rod, the fixed disk and the blanking cylinder assembly of the present invention;

FIG. 9 is a schematic view of the punching column of the present invention reaching its maximum stroke and the positioning device in a first state;

FIG. 10 is a schematic view of the punching column of the present invention reaching its maximum stroke and the positioning device in a second state;

fig. 11 is a schematic structural diagram of the feeding device and the pushing device of the invention.

Reference numerals: 1. a frame; 2. punching a hole frame; 3. a formwork; 4. a die hole; 5. sleeving a die holder; 6. sleeving a mold column; 7. pushing a sleeve; 8. a connecting flap; 9. a channel; 10. a connecting rod; 11. fixing the disc; 12. a blanking cylinder; 13. punching a base; 14. an oil cylinder; 15. punching a hole column; 16. a through hole; 17. positioning holes; 18. a chip storage hole; 19. an air tube; 20. a base; 21. a wire track; 22. a feeding seat; 23. a moving cylinder; 24. accommodating grooves; 25. a column cap; 26. a feeding cylinder; 27. a feed hopper; 28. moving the plate; 29. a clamp cavity; 30. adjusting a rod; 31. a handle head; 32. an adjusting seat; 33. a kidney-shaped mounting hole; 34. a discharge hopper; 35. a collecting basket; 36. and (6) chamfering.

Detailed Description

The embodiments of the present invention will be described in detail below, examples of which are illustrated in the accompanying drawings, and the embodiments described below by referring to the drawings are exemplary and intended to explain the present invention so that the technical solutions of the present invention can be more easily understood and grasped, and cannot be construed as limiting the present invention.

Referring to fig. 1-8, the present invention provides a technical solution: a straight pipe four-direction multi-hole punching machine comprises a rack 1, wherein a punching frame 2 is arranged on the rack 1, the punching frame 2 is in a cross shape, a formwork 3 is fixedly arranged at the center of the punching frame 2, a front through die hole 4 and a rear through die hole 4 are arranged in the formwork 3, and the diameter of the die hole 4 is slightly larger than that of a workpiece, so that the workpiece can be placed in the die hole 4, a user can select the formwork 3 with the proper die hole 4 to be arranged in the punching frame 2 according to the diameter of the workpiece under different production requirements, and the punching frame 2 is provided with a punching device for punching the workpiece, a positioning device for positioning the workpiece and a blanking device for ejecting the processed workpiece; the positioning device comprises a sleeve die seat 5 arranged at the rear side of the die shell 3 and a sleeve die column 6 which is arranged in the center of the sleeve die seat 5 and extends into the die hole 4 for sleeving the workpiece, the diameter of the sleeve die column 6 is slightly smaller than that of the workpiece, so the workpiece can be sleeved on the sleeve die column 6, a user can select a proper sleeve die column 6 according to the diameter of the workpiece under different production requirements, and the sleeve die column 6 is connected with the sleeve die seat 5 and integrally formed; the feeding device comprises a pushing sleeve 7 sleeved outside a sleeve mold column 6, four connecting flaps 8 connected with the outer side of the pushing sleeve 7, a channel 9 communicated with a mold hole 4 and matched with the connecting flaps 8 in size and arranged in a mold shell 3, a connecting rod 10 arranged on the rear side of the connecting flap 8, a fixed disk 11 connected with the rear end of the connecting rod 10 and a feeding cylinder 12 driving the fixed disk 11 to reciprocate, wherein the feeding cylinder 12 is fixedly arranged on a frame 1, the four connecting flaps 8 are uniformly distributed on the outer side of the pushing sleeve 7, the four connecting rods 10 are parallel to each other, the four connecting rods 10 are uniformly distributed on the outer side of a sleeve mold base 5 and are not in contact with the sleeve mold base 5, and the two are not interfered with each other.

The punching device comprises four punching assemblies which are arranged on the punching frame 2 and are respectively positioned on four sides of the die sleeve column 6, each punching assembly comprises a punching seat 13 arranged in the punching frame 2, an oil cylinder 14 which is arranged on the punching frame 2 and drives the punching seat 13 to reciprocate, and a plurality of punching columns 15 which are arranged on the punching seats 13, through holes 16 for the punching columns 15 to extend into are arranged on four sides of the die shell 3, positioning holes 17 for the punching columns 15 to extend into and correspond to the through holes 16 are arranged on four sides of the die sleeve column 6, and the four sides are respectively a right upper side, a right lower side, a right left side and a right side; a large amount of chips are generated in the punching process, a chip blowing device for blowing the chips out of the die shell 3 is further arranged on the punching frame 2, the chip blowing device comprises a chip storage hole 18, an air pipe 19 and an air pump (not shown in the figure), the chip storage hole 18 is arranged at the axial center of the die sleeve column 6 and is communicated with the positioning hole 17, and the rear end of the chip storage hole 18 is connected with the air pump through the air pipe 19.

The diameter of the punching column 15, the diameter of the positioning hole 17, the diameter of the through hole 16, and the diameter of the punching hole of the workpiece are all the same.

Referring to fig. 1 and 11, a feeding device is arranged on a rack 1, the feeding device includes a base 20 mounted on the rack 1, a linear rail 21 arranged on the base 20, a feeding seat 22 mounted on the linear rail 21, and a moving cylinder 23 driving the feeding seat 22 to reciprocate, the moving cylinder 23 is fixedly mounted on the base 20, an accommodating groove 24 for placing a workpiece is arranged on the right side of the feeding seat 22, a column head 25 for pushing the workpiece to enter a die hole 4 and enabling the workpiece to be sleeved on a die sleeve column 6 is arranged in the accommodating groove 24, the column head 25 is connected with a feeding cylinder 26, and the feeding cylinder 26 is fixedly mounted on the feeding seat 22.

Referring to fig. 1 and 11, a pushing device is further disposed on the frame 1, the pushing device includes a feeding hopper 27, the feeding hopper 27 is located above the feeding base 22, a moving plate 28 is disposed in the feeding hopper 27, a clamping cavity 29 for neatly placing a workpiece is formed between the moving plate 28 and one side of the feeding hopper 27, an adjusting rod 30 for adjusting the position of the moving plate 28 and further adjusting the size of the clamping cavity 29 penetrates through the other side of the feeding hopper 27, one end of the adjusting rod 30 is fixedly connected to the moving plate 28, and a handle 31 is disposed at the other end of the adjusting rod.

The feed hopper 27 is typically mounted at the discharge outlet of a vibratory feeder that continuously feeds workpieces into the feed hopper 27. The workpiece is tubular, due to different production requirements, the length of the workpiece is long and short, so a user can rotate the handle 31 at the end part of the adjusting rod 30 according to the length of the workpiece, the shaft part of the adjusting rod 30 is provided with threads, the position of the moving plate 28 is changed under the rotation of the adjusting rod 30 through the properties of the threads, and then the size of the clamping cavity 29 is adjusted, so that the workpieces are orderly arranged in the clamping cavity 29 to wait for punching.

An adjusting seat 32 is arranged in the accommodating groove 24, a waist-shaped mounting hole 33 is formed in the adjusting seat 32, and the adjusting seat 32 penetrates through the waist-shaped mounting hole 33 through a bolt to be mounted in the accommodating groove 24.

The work piece is the tubulose, because the production demand of difference, and is little when big during the diameter of work piece, adjusts seat 32 and passes waist shape mounting hole 33 through the bolt and install in holding tank 24, and waist shape mounting hole 33's design for adjust seat 32 and can suitably adjust the position in holding tank 24, thereby can satisfy and carry on spacingly, more practical to the work piece of different diameters size.

A discharge hopper 34 is arranged on the frame 1, and a collecting basket 35 is arranged below the discharge hopper 34.

The front end of the die sleeve column 6 is provided with a chamfer 36, the chamfer 36 design improves the fault tolerance rate of the invention, when the feeding cylinder 26 drives the column head 25 to push a workpiece into the die hole 4 and enable the workpiece to be sleeved on the die sleeve column 6, even if the position of the workpiece slightly deviates, the workpiece can be sleeved in from the front end of the die sleeve column 6 smoothly, and the purpose of enabling the workpiece to be sleeved on the die sleeve column more easily is achieved.

One specific application of this embodiment is: in the invention, the blanking cylinder 12, the oil cylinder 14, the air pump, the moving cylinder 23 and the feeding cylinder 26 are all electrically connected with a control cabinet, wherein a control chip of the control cabinet adopts PLC programming control equipment.

When the invention is used, workpieces are fed from the feed hopper 27, then the workpieces fall onto the feeding seat 22 along the feed hopper 27, the feeding seat 22 is driven to reciprocate by the moving air cylinder 23, the column head 25 is driven to reciprocate by the feeding air cylinder 26, and the workpieces are fed one by one, and the process is as follows: when the moving cylinder 23 drives the feeding seat 22 to reach the leftmost end, the workpiece just falls into an accommodating groove 24 on the right side of the feeding seat 22 for placing the workpiece, then the moving cylinder 23 drives the feeding seat 22 to move rightwards, when the moving cylinder 23 drives the feeding seat 22 to reach the rightmost end, the workpiece is just in front of the die hole 4, then the column head 25 is driven to move by the feeding cylinder 26, the column head 25 pushes the workpiece to send the workpiece into the die hole 4, the workpiece is sleeved on the die sleeve column 6 to complete feeding, finally, the feeding cylinder 26 drives the column head 25 to reset, the moving cylinder 23 drives the feeding seat 22 to return to the leftmost end, and the moving cylinder 23 and the feeding cylinder 26 are matched in a reciprocating cycle; then, the oil cylinder 14 works to drive the punching seat 13 to reciprocate, the punching column 15 arranged on the punching seat 13 firstly passes through a through hole 16 on the formwork 3 and then passes through a positioning hole 17 on the die sleeve column 6, and then the punching column is reset, the punching column 15 also passes through a workpiece sleeved on the die sleeve column 6 in the process, the punching of the workpiece is completed, the punching column 15 needs to move in the through hole 16 of the formwork 3 when punching, the through hole 16 plays a role in limiting and stabilizing the punching column 15, so that the punching column 15 can stably impact the surface of the smooth workpiece each time without deviation, and the workpiece is sleeved on the die sleeve column 6, so that the die sleeve column 6 plays a role in positioning and supporting the workpiece in the punching process, the deformation of the workpiece caused by overlarge clamping force in the punching process is avoided, and the deformation caused by the stress in the punching process is also avoided; referring to fig. 9 and 10, in the punching process, four cylinders may simultaneously drive the punching posts 15 to punch, or the cylinders on the left and right sides first drive the punching posts 15 to punch, and then the cylinders on the upper and lower sides drive the punching posts 15 to punch, or the cylinders on the upper and lower sides first drive the punching posts 15 to punch, and then the cylinders on the left and right sides first drive the punching posts 15 to punch, which is more suitable than the first method because: the first mode is easy to cause the collision between the punching columns 15 on the left side and the right side and the punching columns 15 on the upper side and the lower side, and the latter two modes can effectively avoid the collision between the punching columns 15 on the left side and the right side and the punching columns 15 on the upper side and the lower side.

In addition, the workpiece is punched by the punch post 15, which generates a large amount of chips, which correspond to the shape of the punch post 15, are approximately "disk" shaped, the chips are carried by the piercing posts 15 into the chip storage holes 18, which, as will be described herein, when the punching column 15 reaches the maximum stroke, the punching column 15 passes through the positioning hole 17 and partially extends into the chip storage hole 18, thereby ensuring that the scraps can successfully fall into the scrap storage holes 18, achieving the aim of concentrating the scrap storage holes 18, when the punching column 15 reaches the maximum stroke, the air pump works to supply air to the air pipe 19, the air flow blown out from the air pipe 19 blows the chips in the chip storage hole 18 forwards out of the chip storage hole 18, the accumulation of the chips is prevented, the subsequent punching is influenced, the air pump can supply air all the time, and the scraps can be blown away immediately as soon as the scraps are generated, so that the scrap removing effect is better; finally, the pushing sleeve 7 is indirectly driven to reciprocate through the pushing cylinder, the workpiece is blanked, and the process is as follows: when the push sleeve 7 moves forwards, the workpiece sleeved on the sleeve mold column 6 is pushed out of the mold hole 4, the workpiece falls on the discharge hopper 34 and finally falls into the collecting basket 35 to finish collection, and then the push cylinder drives the push sleeve 7 to move backwards and return to the initial position, so that the reciprocating circulation is realized.

Because the sleeve die column 6 which plays a role in positioning and supporting the workpiece is arranged in the die hole 4 and the sleeve die column 6 can be arranged in the die hole 4 only through the sleeve die seat 5 in order to avoid the deformation of the workpiece caused by overlarge clamping force in the punching process and the deformation of the workpiece caused by punching force in the punching process, the sleeve die seat 5 which is connected with the sleeve die column 6 and is integrally formed is arranged at the rear side of the die shell 3, and because the sleeve die seat 5 exists, a pushing cylinder can not directly act on the pushing sleeve 7, the pushing cylinder can indirectly act on the pushing sleeve 7 only through the connecting flaps 8, the connecting rods 10 and the fixed disk 11, the number of the connecting flaps 8 is four, the four connecting flaps 8 are uniformly distributed at the outer side of the pushing sleeve 7, the four connecting rods 10 are respectively positioned at the rear side of the four connecting flaps 8, the four connecting rods 10 are mutually parallel and are respectively positioned at the outer side of the sleeve die seat 5, the structure can enable the pushing cylinder to smoothly act on the pushing sleeve 7, and is compact in structure, reasonable in design and space-saving, moreover, the pushing sleeve 7, the connecting flap 8 and the connecting rod 10 are all arranged in the formwork 3, due to the hidden design, the components are not easily impacted or touched by other objects, the stability is better, and the pushing sleeve 7 and the connecting flap 8 only move in the formwork 3, so that the generation of industrial injuries is reduced. In addition, the pushing sleeve 7 can play a role in discharging and also can play a role in limiting a workpiece, when the workpiece is sent into the die hole 4 from the column cap 25 to a certain position, the workpiece can be abutted against the pushing sleeve 7, and the workpiece can not move forwards under the blocking of the pushing sleeve 7, so that each workpiece can be punched at a preset position.

By the integral application of the invention, the integrated automation of the workpiece punching processing procedure is realized, the automatic feeding, punching and blanking can be realized, the manual operation accident is avoided, the labor intensity of personnel is reduced, the workpiece can be subjected to four-direction multi-hole processing, the workpiece punching is uniform, the processing efficiency is high, the workpiece is prevented from deforming in the punching process, the product quality is ensured, in addition, the structure is compact, the design is reasonable, and the occupied space of equipment is small; the chip cleaning effect is good, and the service life of the equipment is longer. Of course, the above is only a typical example of the present invention, and besides, the present invention can also have other various specific embodiments, and all technical solutions adopting equivalent replacement or equivalent transformation are all within the scope of the present invention as claimed.

Claims

1. A straight pipe four-direction multi-hole punching machine comprises a rack and is characterized in that a punching frame is arranged on the rack, a formwork is fixedly installed in the punching frame, a front die hole and a rear die hole which are communicated are formed in the formwork, and a punching device, a positioning device and a blanking device are arranged on the punching frame;

the positioning device comprises a die sleeve seat arranged at the rear side of the die shell and a die sleeve column which is arranged in the center of the die sleeve seat and extends into the die hole for sleeving a workpiece, and the die sleeve column is connected with the die sleeve seat and integrally formed;

the blanking device comprises a push sleeve sleeved outside the die sleeve column, at least one connecting flap connected with the outer side of the push sleeve, a channel communicated with a die hole and matched with the connecting flap in size, a connecting rod arranged at the rear side of the connecting flap, a fixed disc connected with the rear end of the connecting rod and a blanking cylinder driving the fixed disc to reciprocate, wherein the channel is arranged in the die shell, and the blanking cylinder is fixedly arranged on the frame.

2. A straight tube four-way multihole punch as claimed in claim 1, characterized in that: the punching device comprises four punching assemblies which are arranged on a punching frame and are respectively positioned on four sides of a die sleeve column, each punching assembly comprises a punching seat arranged in the punching frame, an oil cylinder which is arranged on the punching frame and drives the punching seat to reciprocate and a plurality of punching columns which are arranged on the punching seats, through holes for the punching columns to extend into are arranged on the four sides of the die shell, and positioning holes for the punching columns to extend into and correspond to the through holes are arranged on the four sides of the die sleeve column;

the punching frame is also provided with a chip blowing device, the chip blowing device comprises a chip storage hole, an air pipe and an air pump, the chip storage hole is formed in the axial center of the die sleeve column and communicated with the positioning hole, and the rear end of the chip storage hole is connected with the air pump through the air pipe.

3. A straight tube four-way multihole punch as claimed in claim 1, characterized in that: the number of the connecting petals is four, the four connecting petals are uniformly distributed on the outer side of the push sleeve, and the four connecting rods are parallel to each other.

4. A straight tube four-way multihole punch as claimed in claim 2, characterized in that: when the punching column reaches the maximum stroke, the punching column penetrates through the positioning hole and partially extends into the scrap storage hole.

5. A straight tube four-way multihole punch as claimed in claim 2, characterized in that: the diameter of the punching column, the diameter of the positioning hole and the diameter of the through hole are the same.

6. A straight tube four-way multihole punch as claimed in claim 1, characterized in that: the automatic feeding device is characterized in that the feeding device is arranged on the rack and comprises a base, a line rail, a feeding seat and a moving cylinder, wherein the base is installed on the rack, the line rail is arranged on the base, the feeding seat is installed on the line rail, the moving cylinder drives the feeding seat to reciprocate, the moving cylinder is fixedly installed on the base, a containing groove for placing a workpiece is formed in the right side of the feeding seat, a column head for pushing the workpiece to enter a die hole and enabling the workpiece to be sleeved on a die sleeve column is arranged in the containing groove, the column head is connected with the feeding cylinder, and the feeding.

7. The straight tube four-direction multihole punch according to claim 6, characterized in that: still be equipped with blevile of push in the frame, blevile of push includes the feeder hopper, the feeder hopper is located the top of pay-off seat, be equipped with the movable plate in the feeder hopper, be formed with the double-layered chamber that makes the work piece neatly put between one side of movable plate and feeder hopper, the opposite side of feeder hopper is worn to be equipped with the regulation pole of adjusting the movable plate position and then adjusting double-layered chamber size, the one end of adjusting the pole with movable plate fixed connection, the other end is equipped with the head.

8. The straight tube four-direction multihole punch according to claim 6, characterized in that: the adjusting seat is arranged in the accommodating groove, a waist-shaped mounting hole is formed in the adjusting seat, and the adjusting seat penetrates through the waist-shaped mounting hole through a bolt to be installed in the accommodating groove.

9. A straight tube four-way multihole punch as claimed in claim 1, characterized in that: the frame is provided with a discharge hopper, and a material collecting basket is placed below the discharge hopper.

10. A straight tube four-way multihole punch as claimed in claim 1, characterized in that: and the front end of the die sleeve column is provided with a chamfer.