CN110181599A - A kind of Pneumatic perforating rifle - Google Patents

Abstract

The invention discloses a pneumatic perforating gun, which comprises a body, a trigger device, a power storage device and an upper mold device, the body includes a gun body, a front end cover, a rear end cover and a gun handle, and the gun handle is arranged on the One side of the gun body is fixedly connected with the gun body, the trigger device is arranged in the handle of the gun, and the trigger device includes a valve control handle, a valve rod and a return spring, and one end of the valve control handle is connected to the The gun handle is hinged, the gun handle is provided with a movable chamber near the valve control handle, one end of the valve stem is hinged with the valve control handle, and the other end of the valve stem is fixedly connected to the return spring extension into the movable chamber and abut against the inner wall of the movable chamber of the handle, the power storage device includes a piston rod, a piston rod base, a spring and hydraulic oil. The punching machine of the invention has the advantages of simple structure, strong controllability, high punching efficiency and easy replacement of different pipe diameters.

Description

A kind of pneumatic perforating gun

technical field

The invention relates to the field of punching equipment, in particular to a pneumatic punching gun.

Background technique

At present, the pneumatic punching machine used for porous punching of plastic and paper products has a complex structure and low structural reproducibility, resulting in long product development cycle, slow delivery time, high production cost, and short life due to poor stability. , resulting in low accuracy of the punched hole pattern, which is prone to defects and is not conducive to production. In addition, in actual work, in order to ensure the quality of punching, the staff often need to additionally position the punched items to ensure the accuracy of the punched items. Stability, for this reason we have designed a new type of pneumatic punching machine that can punch holes efficiently.

Contents of the invention

The object of the present invention is to propose a pneumatic perforating gun for the deficiency of the perforating efficiency of the current perforating gun.

To achieve the above object, the present invention adopts the following technical solutions:

A pneumatic perforating gun includes a body, a trigger device, a power storage device and an upper mold device, the body includes a gun body, a front end cover, a rear end cover and a gun handle, and the gun handle is arranged on one side of the gun body side and is fixedly connected with the gun body, the trigger device is arranged in the gun handle, the trigger device includes a valve control handle, a valve stem and a return spring, and one end of the valve control handle is hinged to the gun handle , the handle is provided with a movable chamber close to the valve control handle, one end of the valve stem is hinged to the valve control handle, and the other end of the valve stem is fixedly connected to the return spring and extends into the movable chamber. chamber, and abut against the inner wall of the movable chamber of the gun handle, the power storage device includes a piston rod, a piston rod base, a spring and hydraulic oil, a first through hole is provided in the piston rod base, and the second The hydraulic oil and the piston rod are respectively provided in a through hole, one end of the piston rod is in contact with one end of the hydraulic oil, the other end of the piston rod is in contact with the rear end cover, and the piston rod is in contact with the rear end cover. The other end of the hydraulic oil protrudes from the front end cover, the piston rod base and the outer circumference of the piston rod are nested with the spring, one end of the spring abuts on the piston rod base, and the spring The other end abuts against the piston rod, and the movable chamber is provided with a gas channel communicating with the gun body.

Optionally, a sealing groove is provided on the outer periphery of the piston rod close to the rear end cover, and a piston rod sealing ring is provided in the sealing groove.

Optionally, an exhaust channel and an air intake channel are also provided inside the handle, and the air intake channel and the exhaust channel are parallel to each other and communicate with the movable chamber.

Optionally, a groove is provided on the outer periphery of the piston rod base near the front end cover, and a piston rod sealing ring is provided in the groove.

Optionally, the outer periphery of the front end cover is socketed on the upper die device, and the upper die device is provided with a locking nut near the front end cover.

Optionally, the upper mold device includes a lower mold sleeve, a punch, a spring leaf and an oil filling hole, the upper mold device is provided with a second through hole, and the outer periphery of the punch needle is nested with the spring leaf and arranged on the In the second through hole of the upper mold device, an oil filling hole is provided directly above the punching needle near the hydraulic oil.

Optionally, the lower mold sleeve is arranged coaxially with the upper mold device and fixedly connected with the inner wall of the second through hole.

Optionally, a hole is provided in the middle of the lower die sleeve, and the hole is coaxial with that of the lower die sleeve.

Optionally, a fastening groove is provided on the side of the air intake channel away from the gun body, and a sealing gasket is provided in the fastening groove.

Optionally, the gun body, the front end cover, the rear end cover, the piston rod, the piston rod base, and the upper mold device are all arranged coaxially.

Beneficial effects of the present invention: by adopting independent air inlet passages and air outlet passages, the drilling operation of the whole equipment is ensured more safely; through the setting of the lower mold sleeve of the upper mold device, it is ensured that the die head in the upper mold can be unloaded Replacement is convenient for changing the aperture of the punching position, increasing different application scenarios; through the cooperation of the valve control valve and the valve stem, the entire device is highly controllable.

Description of drawings

The present invention can be further understood from the following description taken in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts in the different views.

Fig. 1 is a schematic structural view of the perforating gun of the present invention.

Fig. 2 is a schematic structural diagram of A in the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with its embodiments; it should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention. invention. Other systems, methods and/or features of this embodiment will become apparent to those skilled in the art after reviewing the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the following claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the following detailed description.

In the drawings of the embodiments of the present invention, the same or similar symbols correspond to the same or similar components; The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or component must have a specific orientation, use a specific Orientation structure and operation, therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes, and should not be construed as limitations on this patent. Those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations.

Embodiment 1: As shown in Figure 1 and Figure 2, a pneumatic perforating gun includes a body, a trigger device, a power storage device and an upper mold device, and the body includes a gun body 15, a front end cover, a rear end cover and a gun handle 16, the gun handle 16 is arranged on one side of the gun body 15 and is fixedly connected with the gun body 15, the trigger device is arranged in the gun handle 16, and the trigger device includes a valve control handle 3 , valve stem 4 and return spring 5, one end of the valve control handle 3 is hinged with the handle 16, the handle 16 is provided with a movable chamber 17 near the valve control handle 3, and one end of the valve rod 4 Hinged with the valve control handle 3, the end of the other end of the valve rod 4 is fixedly connected to the return spring 5 and extends into the movable chamber 17, and abuts against the inner wall of the movable chamber 17 of the handle 16, The power storage device includes a piston rod 19, a piston rod base 18, a spring 2 and a hydraulic oil 1. The piston rod base 18 is provided with a first through hole, and the hydraulic oil is respectively provided in the first through hole. 1. The piston rod 19, one end of the piston rod 19 abuts against one end of the hydraulic oil 1, the other end of the piston rod 19 abuts against the rear end cover, and the other end of the hydraulic oil 1 Extend the front end cover, the piston rod base 18 and the outer circumference of the piston rod 19 are nested with the spring 2, one end of the spring 2 abuts on the piston rod base 18, the spring 2 The other end abuts against the piston rod 19, and the movable chamber is provided with a gas channel communicating with the gun body 15. A sealing groove is provided on the outer periphery of the piston rod 19 close to the rear end cover, and a piston rod sealing ring 14 is arranged in the sealing groove. An exhaust passage 7 and an air intake passage 6 are also arranged in the handle 16 , and the air intake passage 7 and the exhaust passage 6 are parallel to each other and communicate with the movable chamber 17 . A groove is arranged on the outer periphery of the piston rod base 18 close to the front end cover, and a piston rod seal ring 14 is arranged in the groove. The outer periphery of the front end cover is socketed with the upper die device, and the upper die device is provided with a locking nut 12 close to the front end cover. The upper die device includes a lower die set 11, a punching pin 10, a spring leaf 9 and an oil filling hole 8, the upper die device is provided with a second through hole, and the outer periphery of the punching pin 10 is nested with the spring leaf 9 and set In the second through hole of the upper mold device, an oil filling hole 8 is provided directly above the hydraulic oil 1 on the punching needle. The lower mold case 11 is arranged coaxially with the upper mold device and fixedly connected with the inner wall of the second through hole. A hole is provided in the middle of the lower mold case 11 , and the hole is coaxial with the lower mold case 11 . A fastening groove is provided on the side of the air intake channel away from the gun body, and a sealing gasket is arranged in the fastening groove. The gun body 15, the front end cover, the rear end cover, the piston rod 19, the piston rod base 18, and the upper mold device are coaxially arranged.

Embodiment 2: A pneumatic perforating gun includes a body, a trigger device, a power storage device and an upper mold device, the body includes a gun body 15, a front end cover, a rear end cover and a handle 16, and the handle 16 is set On one side of the gun body 15 and fixedly connected with the gun body 15, the trigger device is arranged in the gun handle 16, and the trigger device includes a valve control handle 3, a valve stem 4 and a return spring 5, One end of the valve control handle 3 is hinged with the handle 16, and the handle 16 is provided with a movable chamber 17 near the valve control handle 3, and one end of the valve rod 4 is hinged with the valve control handle 3, The end of the other end of the valve rod 4 is fixedly connected to the return spring 5 and extends into the movable chamber 17, and abuts against the inner wall of the movable chamber 17 of the handle 16. The power storage device includes a piston rod 19 , the piston rod base 18, the spring 2 and the hydraulic oil 1, the piston rod base 18 is provided with a first through hole, and the hydraulic oil 1 and the piston rod 19 are respectively provided in the first through hole, so One end of the piston rod 19 is in contact with one end of the hydraulic oil 1, the other end of the piston rod 19 is in contact with the rear end cover, and the other end of the hydraulic oil 1 protrudes from the front end cover. The piston rod base 18 and the outer circumference of the piston rod 19 are both nested with the spring 2, one end of the spring 2 abuts against the piston rod base 18, and the other end of the spring 2 abuts against the piston On the rod 19, the movable chamber is provided with a gas passage communicating with the gun body 15. Specifically, the gun body 15 is in the shape of a hollow barrel, and the inner walls of the gun body 15 are arranged parallel to each other. The thread enables the front end cover and the rear end cover to be firmly connected to the gun body 15 . When the valve control handle 3 was pressed, the valve rod 4 would enter the movable chamber 17 of the handle 16, and at this moment, the compressed air of the air inlet 8 would enter the movable chamber 17 and Entering the gun body 15 through the gas channel, the piston rod 19 in the gun body 15 is pushed by the compressed air to realize the forward push. During the pushing process, the hydraulic oil 1 will The front piston generates pressure, which in turn pushes the workpiece for the punching operation. The piston rod 19 includes a cross rod and a vertical rod, one end of the cross rod is fixedly connected to the center of symmetry of the vertical rod, and the cross rod of the piston rod 19 is inserted into the piston rod base 18 . When compressed air enters the gun body 15, the vertical rod is pushed, causing the cross rod to move in the piston rod base 18 and squeeze the hydraulic oil. In particular, the cross bar is parallel to the inner wall of the gun body 15 . The outlet of the gas channel connected to the gun body 15 is arranged below the vertical rod, so that all other gas entering the gun body 15 can push the piston rod 19 to move.

A sealing groove is provided on the outer periphery of the piston rod 19 close to the rear end cover, and a piston rod sealing ring 14 is arranged in the sealing groove. Specifically, the piston rod sealing ring 14 is added so that when compressed air enters the gun body 15, the piston rod 19 can be pushed. That is, all the compressed air acts on the vertical rod of the piston rod, so that the piston rod 19 can move to the position of the piston rod base 18 . The sealing groove on the piston rod is opened along the outer circumference of the piston rod 19, and the depth of the sealing groove is less than the circumference of the piston rod sealing ring 14, so that the piston rod sealing ring 14 protrudes outside and It is sealed with the inner wall of the gun body 15 to ensure that all the compressed air acts on the piston rod 19.

An exhaust passage 7 and an air intake passage 6 are also arranged in the handle 16 , and the air intake passage 7 and the exhaust passage 6 are parallel to each other and communicate with the movable chamber 17 . Specifically, the exhaust passage 7 and the intake passage 6 are different holes to ensure that there will be no conflict during the intake process. When the valve control handle is pressed and released suddenly, the exhaust The channel 7 and the air intake channel 6 can be opened independently, which has a safer feature. The exhaust duct 7 and the air intake duct 6 in this embodiment are parallel to each other and work independently, making full use of the space of the handle 16. In another embodiment, the exhaust duct 7 or the air intake duct 6 Can be set to non-parallel state. In addition, the exhaust channel 7 and the air intake channel 6 in this embodiment are parallel to each other, so that the processes of air intake and air outlet are all arranged on the same side, preventing the impact of the hand on the air outlet channel 7 .

A groove is arranged on the outer periphery of the piston rod base 18 close to the front end cover, and a piston rod seal ring 14 is arranged in the groove. Specifically, the piston rod base 18 is provided with the piston sealing ring 14 so that the airtightness of the space in the entire gun body 15 is higher, ensuring that the piston rod 19 is in the process of compression, the gas from the One side of the piston rod base 18 leaks, which affects the airtightness of the entire device, resulting in a poor punching effect of the entire piston rod 19 . The piston rod base includes an inner layer and an outer layer, and the double-layer design structure of the inner layer and the outer layer prevents relative displacement in the double-layer structure of the entire piston rod base 18, and the piston rod The inner layer of the base 18 is also more closely attached to the piston rod 19 . In addition, a sealing ring 13 is also provided between the inner layer and the outer layer of the piston rod base, and the sealing ring 13 prevents relative movement between the inner layer and the outer layer of the piston rod base. In the process of moving the piston rod 19, there will be no relative displacement.

The outer periphery of the front end cover is socketed with the upper die device, and the upper die device is provided with a locking nut 12 close to the front end cover. The upper die device includes a lower die set 11, a punching pin 10, a spring leaf 9 and an oil filling hole 8, the upper die device is provided with a second through hole, and the outer periphery of the punching pin 10 is nested with the spring leaf 9 and set In the second through hole of the upper mold device, an oil filling hole 8 is provided directly above the hydraulic oil 1 on the punching needle. The lower mold case 11 is arranged coaxially with the upper mold device and fixedly connected with the inner wall of the second through hole. A hole is provided in the middle of the lower mold case 11 , and the hole is coaxial with the lower mold case 11 . Specifically, the front end cover is provided with a locking nut 12 to make the process of fixedly connecting the upper mold device with the front end cover more convenient. When it is necessary to replace die heads of different sizes, the replacement process More time-saving and labor-saving. Under the action of the hydraulic oil, the punching needle 10 will extend forward. When the piston rod 19 stretches forward and compresses the hydraulic oil 1, the hydraulic oil 1 will The punching pin 10 will be driven, and the punching pin 10 will withstand the die head at the front, so that the die head will perform the punching operation. One end of the spring 9 abuts against the inner wall of the second hole, and the other end of the spring piece 9 abuts against the punching pin 10, and during the forward movement of the punching pin 10, the The leaf spring 9 will be compressed. When the punching needle 10 is moving forward, the spring leaf 9 will accumulate force. When the valve control handle 3 is pressed and the piston rod 19 withdraws from the piston rod base plate 18, the The spring leaf 9 will return to its original state, so that the punching needle 10 returns to its original position, and the initial state is when it is not pushed by the piston rod 19 .

The side of the air intake channel 6 away from the gun body 15 is provided with a fastening groove, and a sealing gasket is arranged in the fastening groove. Specifically, the groove of the air intake channel 6 makes it more convenient to connect with the compressed gas pipeline of the peripheral equipment, and also makes the external pipeline have a stable focus point to ensure that the gun body 15 is working During the process, the pipe will not fall off easily. In addition, the sealing gasket also prevents air leakage between the pipeline and the gun handle 16 during the ventilation process, so that all the compressed air acts on the piston rod 19 during the pushing process.

The gun body 15, the front end cover, the rear end cover, the piston rod 19, the piston rod base 18, and the upper mold device are coaxially arranged. Specifically, the gun body 15, the front end cover, the rear end cover, the piston rod 19, the piston rod base 18, and the upper mold device are coaxially arranged so that the entire gun body and its interior The components form a whole to ensure that the piston rod is more smooth and reliable in the process of moving forward. In addition, the coaxial arrangement also ensures more convenience in the process of maintenance or assembly.

Embodiment 3: On the basis of Embodiment 2, a pneumatic punching machine of this embodiment includes a frame, a punching machine head, a punching upper mold, a punching lower mold, a discharge guide rail, a discharge Feed cylinder fixed plate, discharge cylinder, discharge push plate, feed cylinder fixed plate, feed cylinder, feed push plate, feed pressure plate, feed pressure plate shaft, feed guide rail, perforated cylinder, perforated cylinder sliding The guide rail, the head of the punching machine is installed on the top of the frame, the upper punching mold and the lower punching die are installed on the punching machine head, and the lower punching mold is provided with a through hole, and the through hole is located at the top of the punching mold. Below, the sliding guide rail of the drilling cylinder is installed on the head of the punching machine, one end of the drilling cylinder is installed on the sliding guide rail of the drilling cylinder and the other end is connected with the upper punching mold, and the discharge guide rail is installed on the bottom of the punching mold On one side, the discharge cylinder fixed plate is installed on the other side of the punching machine head, the discharge cylinder is installed on the discharge cylinder fixed plate, the piston rod end of the discharge cylinder is connected with the discharge push plate, and the discharge push plate Set towards the discharge guide rail, the fixed plate of the feed cylinder is installed on the side adjacent to the discharge cylinder and the discharge guide rail of the punching lower mold, the feed cylinder is installed on the fixed plate of the feed cylinder, and the feed cylinder is connected with the feed The push plates are connected, the feed push plate is L-shaped, the feed press plate is installed above the feed push plate through the feed press plate shaft, the feed guide rail is installed on the side of the feed cylinder fixed plate, and the feed guide rail is installed with a conveyor belt , the discharge guide frame, the discharge baffle, the discharge baffle fixing frame, the discharge guide frame is installed on one side of the conveyor belt, the discharge baffle is fixed on the discharge baffle fixed frame and it is located above the conveyor belt. It also includes a discharge conduit, which is installed on the feed guide rail and is located between the conveyor belt and the discharge guide frame. The discharge guide includes the discharge guide tube and the discharge guide tube fixing frame. The discharge guide tube fixing frame is installed on one side of the feeding guide rail, and the discharge guide tube is installed on the discharge guide tube fixing frame. And it is obliquely arranged on one side of the feed rail. It also includes a height-limiting plate and a height-limiting plate fixing frame. The height-limiting plate fixing frame is installed on the feed guide rail, and the height-limiting plate is installed below the height-limiting plate fixing frame and is located above the conveyor belt. The distance between the height limiting plate and the fixed plate of the feed cylinder is smaller than the distance between the discharge baffle plate and the fixed plate of the feed cylinder.

To sum up, the present invention provides a pneumatic perforating gun, which ensures a safer perforating operation for the entire equipment by adopting independent air inlet passages and air outlet passages; The die head in the upper mold can be removed for replacement, which is convenient for changing the hole diameter of the punching position, and adds different application scenarios; through the cooperation of the valve control valve and the valve stem, the entire equipment is highly controllable.

While the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. That said, the methods, systems and devices discussed above are examples. Various configurations may omit, substitute, or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different from that described, and/or various components may be added, omitted, and/or combined. Furthermore, features described with respect to certain configurations may be combined in various other configurations, as different aspects and elements of the configurations may be combined in a similar manner. Furthermore, elements therein may be updated as technology develops, ie, many of the elements are examples and do not limit the scope of the disclosure or claims.

Specific details are given in the description to provide a thorough understanding of example configurations including implementations. However, configurations may be practiced without these specific details. For example, well-known circuits, procedures, algorithms, structures and techniques have been shown without unnecessary detail in order to avoid obscuring the configuration. This description provides example configurations only, and does not limit the scope, applicability, or configurations of the claims. Rather, the preceding description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.

In conclusion, it is intended that the foregoing detailed description be considered illustrative rather than restrictive, and that it be understood that the following claims, including all equivalents, are intended to define the spirit and scope of the invention. The above embodiments should be understood as only for illustrating the present invention but not for limiting the protection scope of the present invention. After reading the contents of the present invention, skilled persons can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope defined by the claims of the present invention.

Claims (10)

1. a kind of Pneumatic perforating rifle, including ontology, trigger device, force storage device and upper die device, which is characterized in that the ontology Including gun body (15), drive end bearing bracket, rear end cap and the small of the stock (16), the small of the stock (16) setting the gun body (15) side and with The gun body (15) is fixedly connected, and in the small of the stock (16), the trigger device includes valve control for the trigger device setting Handle (3), valve rod (4) and reset spring (5) processed, one end and the small of the stock (16) of valve control handle (3) hingedly, institute It states the small of the stock (16) and is equipped with movable chamber (17) close to valve control handle (3), one end of the valve rod (4) and the valve control Hingedly, the end of valve rod (4) other end is fixedly connected with the reset spring (5) and protrudes into the movable chamber handle (3) processed (17) it in, and is abutted with movable chamber (17) inner wall of the small of the stock (16), the force storage device includes piston rod (19), piston rod Pedestal (18), spring (2) and hydraulic oil (1), the piston rod pedestal (18) is interior to be equipped with first through hole, divides in the first through hole Not She You the hydraulic oil (1), the piston rod (19), described piston rod (19) one end and one end of the hydraulic oil (1) are supported It connects, the other end of the piston rod (19) is abutted with the rear end cap, and the other end of the hydraulic oil (1) stretches out the front end Lid, the piston rod pedestal (18) and the periphery of the piston rod (19) the nested spring (2), the one of the spring (2) End is connected on the piston rod pedestal (18), and the other end of the spring (2) is connected on the piston rod (19), the work Dynamic chamber is equipped with gas passage and is connected to the gun body (15).

2. a kind of Pneumatic perforating rifle according to claim 1, which is characterized in that close to the piston rod of the rear end cap (19) periphery is equipped with seal groove, is equipped with piston rod seals (14) in the seal groove.

3. a kind of Pneumatic perforating rifle according to claim 1, which is characterized in that be additionally provided with exhaust in the small of the stock (16) Channel (7), inlet channel (6), the inlet channel (7) and the exhaust passage (6) be parallel to each other and with the movable chamber (17) it is connected to.

4. a kind of Pneumatic perforating rifle according to claim 1, which is characterized in that close to the piston rod of the drive end bearing bracket The periphery of pedestal (18) is equipped with groove, is equipped with piston rod seals (14) in the groove.

5. a kind of Pneumatic perforating rifle according to claim 1, which is characterized in that on the periphery socket of the drive end bearing bracket is described Mold device, the upper die device are equipped with locking nut (12) close to the drive end bearing bracket.

6. a kind of Pneumatic perforating rifle according to claim 5, which is characterized in that the upper die device includes lower die-sleeve (11), red needle (10), spring leaf (9) and tank filler sleeve (8), the upper die device are equipped with the second through-hole, red needle (10) periphery The nested spring leaf (9) is simultaneously arranged in the second through-hole of the upper die device, and the red needle is close to the hydraulic oil (1) Surface is equipped with tank filler sleeve (8).

7. according to right want 6 described in a kind of Pneumatic perforating rifle, which is characterized in that the lower die-sleeve (11) and the upper die device It is coaxially disposed and is fixedly connected with the inner wall of second through-hole.

8. a kind of Pneumatic perforating rifle according to claim 7, which is characterized in that the middle part of the lower die-sleeve (11) is equipped with hole Road, the duct are coaxial with the lower die-sleeve (11).

9. a kind of Pneumatic perforating rifle according to claim 3, which is characterized in that the inlet channel is far from the gun body Side is equipped with fastening grooves, is equipped with gasket in the fastening grooves.

10. -9 described in any item a kind of Pneumatic perforating rifles according to claim 1, which is characterized in that the gun body (15), described Drive end bearing bracket, the rear end cap, the piston rod (19), the piston rod pedestal (18), the upper die device are coaxially disposed.