CN215391898U

CN215391898U - Mould for metal corrugated pipe

Info

Publication number: CN215391898U
Application number: CN202121910677.0U
Authority: CN
Inventors: 蔡国丁; 董自盛
Original assignee: Changzhou Hengding Track Technology Co ltd
Current assignee: Changzhou Hengding Track Technology Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-01-04
Anticipated expiration: 2031-08-16

Abstract

The utility model relates to a die for a metal corrugated pipe, which comprises a die body and a pipe blank, wherein the pipe blank is positioned inside the die body, the die body comprises a front die, a middle die piece and a rear die, the front die and the rear die are respectively positioned at two ends of a c forming mechanism, a plurality of middle die pieces are uniformly arranged between the front die and the rear die, a plurality of die cavities are formed between the middle die pieces and the front die and between the middle die pieces and between the adjacent middle die pieces, the corrugated pipe is manufactured, slight resilience is realized after forming, and an inclined well structure is arranged inside each die cavity. When the reinforced waveform is formed, the medium extrudes the tube blank to be more attached to the die cavity, and the tube blank is rebounded through pressure relief, so that the waveform meeting the technical requirements is achieved, the forming stress is released, the fatigue life of the corrugated tube is prolonged, the overall flexibility of a workpiece is improved, the rigidity is reduced, and the displacement compensation effect is more obvious.

Description

Mould for metal corrugated pipe

Technical Field

The utility model relates to the technical field of die equipment, in particular to a die for a metal corrugated pipe.

Background

The S-shaped corrugated pipe has the advantages of excellent pressure resistance, compensation capability, fatigue resistance, long service life and the like, and is widely applied to pipeline systems in the industries of aerospace, petrochemical industry, electric power and the like. However, the S-shaped bellows is difficult to form smoothly and regularly due to its complex wave-shaped cross-sectional characteristics. Particularly, the metal corrugated pipe is expanded by hydraulic pressure to form a cylindrical material into a corrugated pipe with a plurality of continuous S-shaped cross sections, and the excellent performance of the corrugated pipe is very difficult to obtain.

In actual production, the deformation and resilience of the formed corrugated pipe cause deviation between the actual waveform and the designed waveform of the corrugated pipe after pressure forming due to various factors, the machining precision is low, and the product conformance is not high.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a die for a metal corrugated pipe with high machining precision.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides a mould for metal corrugated pipe, includes mould body and pipe, the pipe is located the inside of mould body, the mould body includes front mould, well diaphragm and back mould, front mould and back mould are located the shaping structure both ends respectively, evenly be provided with diaphragm in a plurality of between front mould and the back mould, well diaphragm with between front mould and the back mould and adjacent form a plurality of mould chamber between the well diaphragm, the inside in mould chamber is provided with the inclined shaft.

Through adopting above-mentioned technical scheme, add man-hour, place the pipe behind the inside of mould body, and adjust the front mould, well diaphragm and back mould are used for controlling the shape of S type bellows, the shaping medium is injected into and is pressurized inside the pipe, extrude the inside that enters into the mould chamber with the pipe, thereby guarantee the machine-shaping, and the inclined shaft of the strong inside of mould can be when carrying out the shaping, the even extrusion to the pipe wall when reinforcing wave form takes shape, kick-back through the pressure release, release shaping stress after, improve bellows fatigue life, and whole flexibility obtains improving, the rigidity reduces, the displacement compensation effect is more obvious, the shaping precision is higher.

The present invention in a preferred example may be further configured to: the middle die piece comprises a limiting part and a forming part, the limiting part is far away from the tube blank, and the forming part faces the tube blank.

Through adopting above-mentioned technical scheme, through the setting of spacing portion and shaping portion, effectual balanced bellows wave form pressure-bearing, whole shaping is more even.

The present invention in a preferred example may be further configured to: the connecting part between spacing portion with the shaping portion is provided with the fillet, just the thickness of shaping portion is kept away from connecting portion crescent.

Through adopting above-mentioned technical scheme, the fillet can effectively improve bellows crest circular arc transition, makes the smooth and easy no closed angle of bellows shape transition, and the shaping portion pressure of crescent is more even, and the shaping effect is better.

The present invention in a preferred example may be further configured to: the top of the front mold is provided with a front mold liquid injection hole, and the rear mold is provided with a rear mold exhaust device.

Through adopting above-mentioned technical scheme, front mould liquid injection hole and back mould exhaust apparatus can pressurize the both ends bath exhaust of pipe in the course of working, guarantee that pressure is more even.

The present invention in a preferred example may be further configured to: and an insert is arranged among the front die, the middle die plate and the rear die.

By adopting the technical scheme, the insert is used for adjusting the distance among the front die, the middle die plate and the rear die, and the shape of each section of the corrugated pipe is ensured to be the same.

In summary, the utility model includes at least one of the following beneficial technical effects:

1. the technical scheme that the mould body is provided with the front mould, the middle mould sheet and the rear mould, and a plurality of mould cavities with inclined wells are formed among the front mould, the middle mould sheet and the rear mould is adopted, so that the uniform extrusion on the pipe wall during the wave forming can be enhanced, slight resilience is realized after the wave forming, the wave form meeting the technical requirement of the corrugated pipe is achieved, the forming stress is released after the wave form is subjected to pressure relief resilience, the fatigue life of the corrugated pipe is prolonged, the overall flexibility is improved, the rigidity is reduced, and the displacement compensation effect is more obvious;

2. the technical scheme that the middle diaphragm is composed of the limiting part and the forming part, the front die liquid injection hole is formed in the top of the front die, and the rear die exhaust hole is formed in the rear die is adopted, so that a forming medium is filled in a pipe during equipment processing, the stress is more uniform, and the forming effect is better;

3. the technical scheme that the insert is arranged among the front die, the middle die piece and the rear die is adopted, so that the distance among the front die, the middle die piece and the rear die can be adjusted, and the effect that the shapes of all sections of the corrugated pipe are the same is ensured.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which

Fig. 1 is a schematic view of the overall structure of the present embodiment.

Fig. 2 is a schematic structural view after processing in the present embodiment.

Fig. 3 is a partially enlarged schematic view of a portion a of fig. 2.

The reference numbers in the drawings are:

1. a front mold; 2. a middle mold sheet; 21. a limiting part; 22. a molding section; 3. a rear mold; 4. a pipe blank; 5. a mold cavity; 6. an insert.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1-3, the die for the metal corrugated pipe disclosed by the utility model comprises a die body and a pipe blank 4, wherein the pipe blank 4 is positioned inside the die body, the die body comprises a front die 1, a middle die piece 2 and a rear die 3, the front die 1 and the rear die 3 are respectively positioned at two ends of equipment, a plurality of middle die pieces 2 are uniformly arranged between the front die 1 and the rear die 3, a plurality of die cavities 5 are formed between the middle die pieces 2 and the front die 1 and the rear die 3 and between the adjacent middle die pieces 2, an inclined shaft is arranged inside the die cavities 5, a front die liquid injection hole is formed in the top of the front die 1, a rear die exhaust device is formed on the rear die 3, and an insert 6 is arranged between the front die 1, the middle die piece 2 and the rear die 3.

The distance among the front die 1, the middle die 2 and the rear die 3 is adjusted by installing different inserts 6 before processing, so that corrugated pipes with different sizes and distances can be processed, the adjustment can be carried out according to actual conditions, the distances are more uniform and consistent, and the forming precision is ensured; when processing, the front mould liquid injection hole and the rear mould liquid injection hole which are arranged on the surfaces of the front mould 1 and the rear mould 3 are simultaneously pressurized and expanded to force the tube blank 4 to be formed in the mould cavity 5 formed by the mould sheet, then when demoulding, because the corrugated pipe has deformation resilience, the inclined shaft is utilized to enhance the uniform extrusion of the tube wall when wave forming, and slight resilience is formed after forming, thus achieving the wave form of the technical requirement of the corrugated pipe.

Well diaphragm 2 includes spacing portion 21 and shaping portion 22, and spacing portion 21 is kept away from pipe 4 and is set up, and shaping portion 22 sets up towards pipe 4, and the junction between spacing portion 21 and the shaping portion 22 is provided with the chamfer, and the thickness of shaping portion 22 keeps away from spacing portion 21 crescent gradually, and spacing portion 21 carries out the butt with inserting 6, forms die cavity 5 between the shaping portion 22, and the shaping effect is better, guarantees the machining precision of equipment.

The improvement of the mould on the corrugated pipe has the following two aspects:

the improvement of the mould on the forming appearance of the corrugated pipe is as follows:

1) the corrugated pipe can be effectively balanced in waveform bearing, and the integral forming is uniform;

2) the crest arc transition of the corrugated pipe can be effectively improved, so that the corrugated pipe is smooth in shape transition and free of sharp corners;

3) the interlayer fitting degree of the multilayer corrugated pipe is well improved;

secondly, improving the performance of the corrugated pipe by the mould:

1) after the corrugated pipe is formed, the forming stress is released through pressure relief and rebound, and the fatigue life of the corrugated pipe is prolonged;

2) after the corrugated pipe is formed, the overall flexibility is improved, the rigidity is reduced, and the displacement compensation effect is more obvious.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A mould for a metal corrugated pipe comprises a mould body and a pipe blank (4), wherein the pipe blank (4) is positioned in the mould body, and is characterized in that: the mould body includes front mould (1), well die piece (2) and back mould (3), front mould (1) and back mould (3) are located the both ends of equipment respectively, evenly be provided with die piece (2) in a plurality of between front mould (1) and back mould (3), well die piece (2) with between front mould (1) and back mould (3) and adjacent form a plurality of mould chamber (5) between well die piece (2), the inside of mould chamber (5) is provided with the inclined shaft.

2. The die for a metal bellows according to claim 1, wherein: well diaphragm (2) include spacing portion (21) and shaping portion (22), spacing portion (21) are kept away from pipe (4) set up, shaping portion (22) orientation pipe (4) set up.

3. The die for a metal bellows according to claim 2, wherein: the junction between spacing portion (21) and shaping portion (22) is provided with the fillet, just the thickness of shaping portion (22) is kept away from spacing portion (21) crescent.

4. The die for a metal bellows according to claim 1, wherein: the top of the front die (1) is provided with a front die liquid injection hole, and the rear die (3) is provided with a rear die exhaust device.

5. The die for a metal bellows according to claim 1, wherein: and an insert (6) is arranged among the front die (1), the middle die piece (2) and the rear die (3).