A pipe punching die

Abstract

The present invention discloses a pipe punching die, which is used to punch a pair of notches or through holes arranged oppositely at the end of a pipe, and the pipe punching die comprises an upper die, a punch fixed to the upper die, a lower die and a concave die fixed to the lower die, wherein: the punch comprises a punch body, and a first blade and a second blade protruding from the side wall of the punch body, the first blade and the second blade are arranged at intervals up and down, and the spacing between the first blade and the second blade is equal to the spacing between the pair of notches or the pair of through holes on the pipe; the concave die is used to fix the pipe, and has a first avoidance portion that can avoid the punch when the upper die and the lower die are closed. The pipe punching die provided by the present invention can punch two notches or through holes on the pipe at one time based on the up and down movement of the punch, and the die is simple and easy to take and put products.

Description

Technical Field

[0001] The invention relates to the field of pipe fitting processing equipment production, in particular to a pipe fitting punching die. Background Art

[0002] To facilitate the connection and positioning of pipe fittings and other components, such as Figure 1 As shown, in some application scenarios, a coaxial notch 101 or a connecting hole, a positioning hole, etc. needs to be provided at the end of the tube 100.

[0003] In order to form the above-mentioned notch 101 or hole on the pipe 100, especially on a round pipe, the difficulty of the operation lies in that the pipe must be prevented from being flattened by the punching die during the punching process. Therefore, a common processing method is punching by a punching die, and there are two specific punching operation methods:

[0004] 1. Place the pipe fitting horizontally, punch out the first notch or hole on the upper side of the processed end of the pipe fitting, then turn the pipe fitting upside down so that the unprocessed side of the processed end of the pipe fitting faces upward, and punch out the second notch or hole again.

[0005] 2. Place the pipe fitting horizontally, and punch from the left and right sides of the horizontal position of the pipe fitting to form two notches or holes at one time.

[0006] The first operation method needs to be divided into two steps, which is inefficient. The first operation method requires the punching equipment to be equipped with an additional transmission device to guide the punching power to be released horizontally, making the punching equipment structure complicated. Summary of the invention

[0007] In order to overcome the defects in the prior art, an embodiment of the present invention provides a pipe punching die to solve the above technical problems.

[0008] The present application discloses:

[0009] A pipe punching die is used to punch a pair of oppositely arranged notches or through holes at the end of a pipe. The pipe punching die comprises an upper die, a punch fixed to the upper die, a lower die, and a concave die fixed to the lower die, wherein:

[0010] The punch comprises a punch body, and a first blade and a second blade protruding from a side wall of the punch body, wherein the first blade and the second blade are spaced apart from each other, and the spacing between the first blade and the second blade is equal to the spacing between a pair of notches or a pair of through holes on the pipe;

[0011] The female die is used to fix the pipe fitting, and has a first avoidance portion that can avoid the punch when the upper die and the lower die are closed.

[0012] Furthermore, the first blade portion and the second blade portion are both square in cross-section, so that when the upper mold and the lower mold are closed, the first blade portion and the second blade portion can respectively punch out a pair of oppositely arranged square notches or square through holes at the end of the pipe fitting.

[0013] Furthermore, the first cutting edge is smoothly connected to the punch body.

[0014] Furthermore, an angle between an upper side of a root end of the second cutting edge and the punch body is an obtuse angle.

[0015] Furthermore, the die comprises a die body and a fixing portion embedded in or integrally formed with the die body, and the fixing portion can be adapted to be inserted into a port of the pipe fitting to fix the end of the pipe fitting.

[0016] Furthermore, the fixing portion has a second avoidance portion capable of avoiding the first blade portion and the second blade portion when the upper mold and the lower mold are clamped.

[0017] Furthermore, a parting spring is provided between the upper die and the lower die.

[0018] Furthermore, the pipe punching die also includes an inner guide column, and the upper and lower sides of the inner guide column are respectively plugged into the upper die and the lower die.

[0019] The beneficial effects of the present invention are:

[0020] The pipe fitting punching die provided by the present invention can punch and form two notches or through holes on the pipe fitting at one time based on the up and down movement of the punch, and the die is simple and it is easy to take and place the product.

[0021] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the structure of the pipe fitting.

[0024] Figure 2 A schematic structural diagram of a pipe punching die in a mold separation state in an embodiment of the present invention;

[0025] Figure 3Schematic diagram of the structure of the pipe punching die in the embodiment of the present invention in the mold closing state;

[0026] Figure 4 1 is a top view of the pipe punching die in an embodiment of the present invention (the upper die is hidden).

[0027] Reference numerals in the above drawings:

[0028] 100, pipe fitting; 101, notch;

[0029] 1. Upper die; 2. Punch; 21. Punch body; 22. First cutting edge; 23. Second cutting edge; 3. Lower die; 4. Concave die; 41. First avoidance portion; 42. Fixing portion; 5. Parting spring; 6. Inner guide pin. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 2 , Figure 3 and Figure 4 A pipe punching die is shown, which is used to punch a pair of oppositely arranged notches 101 or through holes at the end of a pipe 100. The pipe punching die includes an upper die 1, a punch 2 fixed to the upper die 1, a lower die 3 and a die 4 fixed to the lower die 3, wherein: the punch 2 includes a punch body 21, and a first blade 22 and a second blade 23 protruding from the side wall of the punch body 21, the first blade 22 and the second blade 23 are arranged at intervals up and down, and the spacing between the first blade 22 and the second blade 23 is equal to the spacing between the pair of notches 101 or the pair of through holes on the pipe 100; the die 4 is used to fix the pipe 100, and has a first avoidance portion 41 that can avoid the punch 2 when the upper die 1 and the lower die 3 are closed.

[0032] Please combine Figure 1Taking the example of punching a pair of square holes on the end of a circular tube 100, which are connected by a line passing through the axis of the circular tube 100, the punch 2 is configured according to the first spacing of the two square holes to be formed on the circular tube 100 (i.e., the difference between the outer diameter of the circular tube 100 and its wall thickness), so that the second spacing between the first blade 22 and the second blade 23 on the punch body 21 (i.e., the spacing between the lower edge of the first blade 22 and the lower edge of the second blade 23) is consistent with the first spacing. The cross-sections of the first blade 22 and the second blade 23 are both square.

[0033] During the punching operation, the upper die 1 and the lower die 3 are opened, and the processed end of the circular tube 100 is placed and fixed on the concave die 4. At this time, the distance between the upper die 1 and the lower die 3 is such that when the circular tube 100 is fixed on the concave die 4, the lower second blade 23 of the first blade 22 and the second blade 23 is located in the tube mouth of the processed end of the circular tube 100. Subsequently, the upper die 1 and the lower die 3 are closed, and the first blade 22 and the second blade 23 can punch and form oppositely arranged square notches 101 on the upper and lower sides of the end of the tube 100, respectively.

[0034] It can be understood that by adjusting and specifically reducing the displacement value when the upper mold 1 and the lower mold 3 are closed, when the upper mold 1 and the lower mold 3 are closed, the first blade 22 and the second blade 23 cut into but do not completely cut off the tube wall of the processed end of the circular tube 100, thereby forming a square through hole on the circular tube 100.

[0035] In other optional embodiments, the pipe punching die can also be used to form a notch 101 or a through hole on a pipe 100 of other shapes such as a square pipe. In addition, by adjusting the cross-sectional shapes of the first blade 22 and the second blade 23, the notch 101 or through hole of different shapes can also be formed.

[0036] Specifically, in this embodiment, the first blade 22 and the second blade 23 are integrally formed with the punch body 21. During processing, part of the material is removed from one side of the upper middle portion of the punch body 21 to form the first blade 22 and the second blade 23 that are spaced apart. In order to ensure that the first blade 22 and the second blade 23 have better connection strength with the punch body 21, the first blade 22 and the punch body 21 can be smoothly connected, that is, the material of the punch body 21 located above the first blade 22 can be left intact. In addition, the angle between the upper side of the root end of the second blade 23 and the punch body 21 is an obtuse angle, so that the impact force during punching can be dispersedly transmitted to the punch body 21 to prevent breakage.

[0037] In an optional embodiment, the die 4 includes a die body 4 and a fixing portion 42 embedded or integrally formed with the die body 4, and the fixing portion 42 can be adapted to be inserted into the port of the pipe 100 to fix the end of the pipe 100. Further, the fixing portion 42 has a second avoidance portion (not shown in the figure) that can avoid the first blade portion 22 and the second blade portion 23 when the upper die 1 and the lower die 3 are closed.

[0038] Specifically, the outer edge profile of the fixing portion 42 is equal to or similar to the inner diameter of the pipe 100, and the middle part is hollowed out or recessed to form a second avoidance portion, and the solid parts located on both sides of the second avoidance portion can be inserted into the port of the pipe 100 to fix the end of the pipe 100. In the prior art, the die 4 for fixing the pipe 100 has a variety of widely implemented structural forms, which will not be described in detail here.

[0039] Preferably, the fixing portion 42 can be optionally equipped with a variety of size rules, and is embedded and fixed with the main body of the die 4 through the same embedding structure, so as to be suitable for processing pipe fittings 100 of different shapes and sizes.

[0040] Preferably, in order to facilitate the placement and removal of the tube 100 and improve the punching efficiency, a parting spring 5 is provided between the upper die 1 and the lower die 3 .

[0041] Preferably, the pipe punching die further comprises an inner guide post 6, the upper and lower sides of which are respectively plugged into the upper die 1 and the lower die 3, so that the upper die 1 and the lower die 3 can accurately move toward each other when the die is closed, thereby ensuring accurate punching position.

[0042] Specific embodiments are used in the present invention to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solution and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A pipe punching die, used for punching a pair of oppositely arranged notches or through holes at the end of a pipe, the pipe punching die comprising an upper die, a punch fixed to the upper die, a lower die and a concave die fixed to the lower die, characterized in that: The punch comprises a punch body, and a first blade and a second blade protruding from a side wall of the punch body, wherein the first blade and the second blade are spaced apart from each other, and the spacing between the first blade and the second blade is equal to the spacing between a pair of notches or a pair of through holes on the pipe; The concave die is used to fix the pipe fitting and has a first avoidance portion that can avoid the punch when the upper die and the lower die are closed; The die comprises a die body and a fixing portion embedded or integrally formed with the die body, wherein the fixing portion can be adapted to be inserted into the port of the pipe fitting to fix the end of the pipe fitting; The cross-sections of the first blade and the second blade are both square, so that when the upper mold and the lower mold are closed, the first blade and the second blade can respectively punch out a pair of oppositely arranged square notches or square through holes at the end of the pipe.

2. The pipe punching die according to claim 1, characterized in that: The first cutting edge is smoothly connected to the punch body.

3. The pipe punching die according to claim 1, characterized in that: The angle between the upper side of the root end of the second cutting edge and the punch body is an obtuse angle.

4. The pipe punching die according to claim 1, characterized in that: The fixing portion includes a second escape portion capable of escaping the first blade portion and the second blade portion when the upper mold and the lower mold are clamped.

5. The pipe punching die according to claim 1, characterized in that: A mold separation spring is arranged between the upper mold and the lower mold.

6. The pipe punching die according to claim 1, characterized in that: The pipe punching die also includes an inner guide column, and the upper and lower sides of the inner guide column are respectively plugged into the upper die and the lower die.

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