CN218692996U

CN218692996U - Nonrust steel pipe water rises forming die

Info

Publication number: CN218692996U
Application number: CN202223052324.9U
Authority: CN
Inventors: 朱演霖; 麦海东
Original assignee: Shenzhen Minle Pipe Industry Co ltd
Current assignee: Shenzhen Minle Pipe Industry Co ltd
Priority date: 2022-11-15
Filing date: 2022-11-15
Publication date: 2023-03-24
Anticipated expiration: 2032-11-15

Abstract

The utility model belongs to the technical field of stainless steel pipe production, in particular to a stainless steel pipe water expansion forming die, which comprises a lower die and an upper die; an upper die is arranged at the top of the lower die; the lower die is internally provided with a plurality of positioning guide holes; then a vacuum generator is arranged at the end part of the vacuum pump quick connector, the mold cavity forms negative pressure by opening the vacuum generator, the stress condition of the stainless steel pipe in the mold cavity is changed, the adverse acting force when the stainless steel pipe is deformed is eliminated, the stainless steel pipe is deformed to the required shape, the fitting degree of the stainless steel pipe and the mold cavity is better, and the fuller appearance and the satisfied size precision are obtained.

Description

Nonrust steel pipe water rises forming die

Technical Field

The utility model relates to a nonrust steel pipe production technical field specifically is a nonrust steel pipe water rises forming die.

Background

The stainless steel pipe fitting forming mode is currently and commonly used mechanical forming or internal high-pressure forming, and the two technologies are that the stainless steel pipe fitting is subjected to unilateral acting force, so that stainless steel metal is deformed until an ideal shape is achieved.

In the case of internal high pressure forming, the existing die seals two ends of the pipe orifice of the stainless steel pipe fitting by using a punch of the die, and then high pressure water is fed from the punch of the die to apply high pressure to the stainless steel, so that the stainless steel pipe is formed.

In the prior art, the sizes of a convex ring and a bell mouth of a stainless steel pipe cannot be ensured by the conventional internal high-pressure forming die when the stainless steel pipe is subjected to water swelling forming, the sizes of the convex ring and the bell mouth of a product are unstable due to different stress directions of the inner wall and the outer wall when the stainless steel pipe is formed, and the sizes of the two parts are deviated due to the defect that the appearance of the product is not full; therefore, a water expansion forming die for stainless steel pipes is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

In order to compensate the deficiency of the prior art, solve the problem in the above-mentioned background art, the utility model provides a nonrust steel pipe water rises forming die.

The utility model provides a technical scheme that its technical problem adopted is: the utility model relates to a stainless steel pipe water expansion forming die, which comprises a lower die and an upper die; an upper die is arranged at the top of the lower die; the lower die is internally provided with a plurality of positioning guide holes; the end part of the upper die is fixedly connected with a plurality of positioning guide columns; the surface of the lower die is provided with a first guide cavity; a second guide cavity is formed in the surface of the upper die; a punch is arranged at the end part of the first guide cavity; an exhaust groove is formed in the end part of the lower die; a vacuum pump quick connector is arranged inside the exhaust groove; and a vacuum generator is arranged at the end part of the vacuum pump quick connector.

Preferably, an upper sealing ring is arranged in the second guide cavity; the surface of the lower die is provided with a sealing groove; and a lower sealing ring is arranged in the sealing groove.

Preferably, the bottom of the first guide cavity is provided with a drain hole, and the diameter of the drain hole is 0.2mm.

Preferably, a sealing plug is installed inside the drainage hole.

Preferably, the surface of the lower die is provided with a positioning groove; a positioning block is fixedly connected to the surface of the upper die; the positioning block is matched with the positioning groove; the exhaust groove is matched with the vacuum pump quick connector.

The utility model discloses an useful part lies in:

1. the utility model discloses a place the first inside of leading the chamber with the product, then close the top at the lower mould through going up the mould lid, make the location guide pillar align the location guide hole and insert to the bottom, install and fix a position, when last mould and lower mould lid close together, through installing the inside at the exhaust duct with vacuum pump quick-operation joint, the drift inserts the first inside of leading the chamber and leading the chamber with the second, then at vacuum pump quick-operation joint's tip installation vacuum generator, through opening vacuum generator, make the mould die cavity form the negative pressure, change the atress situation of nonrust steel pipe at the mould die cavity, eliminate the unfavorable effort when nonrust steel pipe deformation, make nonrust steel pipe take place deformation to the shape of needs, make nonrust steel pipe better with the die cavity laminating degree, thereby obtain fuller appearance and satisfied size precision.

2. The utility model discloses a place the surface of seal groove with the product, when lower mould and last mould lid closed for go up the sealing washer extrusion and become the surface of product, the cooperation seal groove carries out the lock and surrounds, plays sealed effect.

Drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly introduced, obviously, the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective view of a first embodiment;

FIG. 2 is a bottom view of the first embodiment;

FIG. 3 is an enlarged view of FIG. 1 at A;

FIG. 4 is an enlarged view of FIG. 1 at B;

fig. 5 is a schematic structural view of a gasket according to a second embodiment.

In the figure: 1. a lower die; 21. an upper die; 22. positioning the guide post; 23. positioning the guide hole; 24. a first guide cavity; 25. a punch; 26. an exhaust duct; 27. a vacuum pump quick coupling; 28. a second guide cavity; 31. an upper sealing ring; 32. a sealing groove; 33. a lower seal ring; 41. a drain hole; 42. a sealing plug; 51. the positioning is fast; 52. positioning a groove; 6. and a gasket.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example one

Referring to fig. 1-4, a water expansion forming mold for stainless steel pipes includes a lower mold 1 and an upper mold 21; an upper die 21 is arranged at the top of the lower die 1; the lower die 1 is internally provided with a plurality of positioning guide holes 23; the end part of the upper die 21 is fixedly connected with a plurality of positioning guide posts 22; a first guide cavity 24 is formed in the surface of the lower die 1; a second guide cavity 28 is formed in the surface of the upper die 21; a punch 25 is arranged at the end part of the first guide cavity 24; an exhaust groove 26 is formed in the end part of the lower die 1; a vacuum pump quick connector 27 is arranged inside the exhaust groove 26; the end part of the vacuum pump quick connector 27 is provided with a vacuum generator; during operation, the sizes of a convex ring and a socket of a stainless steel pipe cannot be guaranteed when the existing internal high-pressure forming die is used for forming the stainless steel pipe in a water expansion mode, the stress on the inner wall and the outer wall of the stainless steel pipe is different in direction when the stainless steel pipe is formed, the sizes of the convex ring and the socket of the product are unstable, the size of the two parts can be deviated due to the defect that the appearance of the product is not full, the product is placed in a first guide cavity 24, then an upper die 21 is covered on the top of a lower die 1, a positioning guide pillar 22 is aligned with a positioning guide hole 23 and inserted into the bottom of the guide hole, the installation and the positioning are carried out, when the upper die 21 and the lower die 1 are covered together, a vacuum pump quick connector 27 is installed inside an exhaust groove 26, a punch 25 is inserted into the first guide cavity 24 and a second guide cavity 28, then a vacuum generator is installed at the end part of the vacuum pump quick connector 27, the negative pressure is formed in an unfavorable cavity by opening the vacuum generator, the stress condition of the stainless steel pipe in the die cavity is changed, the acting force when the stainless steel pipe is deformed is eliminated, the stainless steel pipe is deformed to the required shape, the stainless steel pipe is deformed, the stainless steel pipe and the stainless steel pipe is better in the appearance and the satisfactory size of the full cavity is obtained, and the satisfactory accuracy of the appearance accuracy is better.

An upper sealing ring 31 is arranged in the second guide cavity 28; a sealing groove 32 is formed in the surface of the lower die 1; a lower sealing ring 33 is arranged in the sealing groove 32; during operation, the surface of the sealing groove 32 is placed with a product, when the lower die 1 and the upper die 21 are closed, the upper sealing ring 31 is extruded on the surface of the formed product, and the sealing groove 32 is matched for buckling and surrounding, so that a sealing effect is achieved.

A drain hole 41 is formed at the bottom of the first guide cavity 24, and the aperture of the drain hole 41 is 0.2mm; during operation, through having seted up wash port 41 in the bottom of first guide cavity 24, when a large amount of water appeared in the inside of first guide cavity 24, through install pumping equipment at the tip of wash port 41, extract the inside water of first guide cavity 24, avoid the inside water of first guide cavity 24 to stretch, influence drift 25 in to the stainless steel pipe punching press process, the problem of deviation appears.

A sealing plug 42 is arranged in the drain hole 41; when the drainage of the drainage hole 41 is completed during operation, the sealing plug 42 is sealed in the drainage hole 41, thereby achieving a sealing effect.

A positioning groove 52 is formed in the surface of the lower die 1; a positioning block 51 is fixedly connected to the surface of the upper die 21; the positioning block 51 is matched with the positioning groove 52; the exhaust groove 26 is matched with a vacuum pump quick connector 27; during operation, when the lower die 1 and the upper die 21 are closed, the positioning groove 52 is inserted into the positioning block 51 for positioning and installation, so that the problem of deviation when the upper die 21 and the lower die 1 are closed is avoided.

Example two

Referring to fig. 5, in a first comparative example, as another embodiment of the present invention, a sealing gasket 6 is installed on the inner side walls of the second guide cavity 28 and the first guide cavity 24; during operation, the sealing gaskets 6 are arranged on the inner side walls of the first guide cavity 24 and the exhaust groove 26, and when the punch 25 is inserted into the first guide cavity 24 and the second guide cavity 28, the sealing effect is achieved through the sealing gaskets 6, so that the problems of water leakage, air leakage and the like are avoided.

The working principle is as follows: the sizes of a convex ring and a socket of a stainless steel pipe cannot be guaranteed when the stainless steel pipe is subjected to water expansion molding by the conventional internal high-pressure molding die, the sizes of the convex ring and the socket of the stainless steel pipe cannot be guaranteed, the sizes of the convex ring and the socket of the product cannot be deviated due to the defect that the appearance of the product is not full, the product is placed in a first guide cavity 24, an upper die 21 is covered on the top of a lower die 1, a positioning guide post 22 is aligned with a positioning guide hole 23 and inserted into the bottom of the positioning guide hole for installation and positioning, when the upper die 21 and the lower die 1 are covered together, a vacuum pump quick connector 27 is installed in an exhaust groove 26, a punch 25 is inserted into a first guide cavity 24 and a second guide cavity 28, a vacuum generator is installed at the end part of the vacuum pump quick connector 27, the die forms negative pressure by opening the vacuum generator, the stress condition of the stainless steel pipe in a die cavity is changed, the adverse acting force generated when the stainless steel pipe is deformed is eliminated, the stainless steel pipe is deformed to the required shape, the stainless steel pipe is fully adhered to the cavity, and the appearance accuracy and the satisfactory appearance accuracy of the stainless steel pipe can be obtained; by placing a product on the surface of the sealing groove 32, when the lower die 1 and the upper die 21 are closed, the upper sealing ring 31 is extruded on the surface of the formed product, and is matched with the sealing groove 32 for buckling and surrounding, so that the sealing effect is achieved; by arranging the water drainage hole 41 at the bottom of the first guide cavity 24, when a large amount of water is in the first guide cavity 24, the water in the first guide cavity 24 is extracted by installing the water pumping device at the end part of the water drainage hole 41, so that the problem that the water in the first guide cavity 24 spreads to influence the punch 25 to generate deviation in the process of punching the stainless steel pipe is solved; when the drainage of the drainage hole 41 is finished, the sealing plug 42 is plugged in the drainage hole 41, so that the sealing effect is achieved; when the lower die 1 and the upper die 21 are closed, the positioning groove 52 is inserted into the positioning block 51 for positioning and installation, so that the problem of deviation when the upper die 21 and the lower die 1 are closed is avoided.

In the description of the present specification, reference to the description of "one embodiment," "an example," "a specific example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.

Claims

1. A water expansion forming die for a stainless steel pipe comprises a lower die (1) and an upper die (21); an upper die (21) is arranged at the top of the lower die (1); the lower die (1) is internally provided with a plurality of positioning guide holes (23); the end part of the upper die (21) is fixedly connected with a plurality of positioning guide posts (22); the method is characterized in that: a first guide cavity (24) is formed in the surface of the lower die (1); a second guide cavity (28) is formed in the surface of the upper die (21); a punch (25) is arranged at the end part of the first guide cavity (24); an exhaust groove (26) is formed in the end of the lower die (1); a vacuum pump quick connector (27) is arranged in the exhaust groove (26); and a vacuum generator is arranged at the end part of the vacuum pump quick connector (27).

2. The stainless steel tube water expansion forming die of claim 1, wherein: an upper sealing ring (31) is arranged in the second guide cavity (28); a sealing groove (32) is formed in the surface of the lower die (1); and a lower sealing ring (33) is arranged in the sealing groove (32).

3. The stainless steel tube water expansion forming die of claim 2, wherein: the bottom of the first guide cavity (24) is provided with a drain hole (41), and the diameter of the drain hole (41) is 0.2mm.

4. The stainless steel tube water expansion forming die of claim 3, wherein: a sealing plug (42) is arranged in the drainage hole (41).

5. The stainless steel tube water expansion forming die of claim 4, wherein: a positioning groove (52) is formed in the surface of the lower die (1); and a positioning block (51) is fixedly connected to the surface of the upper die (21).

6. The stainless steel tube water expansion forming die of claim 5, wherein: the positioning block (51) is matched with the positioning groove (52); the exhaust groove (26) is matched with a quick joint (27) of a vacuum pump.