CN214639457U - Axial low-pressure shaping die for corrugated pipe - Google Patents
Axial low-pressure shaping die for corrugated pipe Download PDFInfo
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- CN214639457U CN214639457U CN202120873096.8U CN202120873096U CN214639457U CN 214639457 U CN214639457 U CN 214639457U CN 202120873096 U CN202120873096 U CN 202120873096U CN 214639457 U CN214639457 U CN 214639457U
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Abstract
The utility model provides a bellows axial low pressure die that appears, include: the die comprises a die holder, an eccentric insert and a sealing punch; the eccentric insert is arranged in the middle of the inner cavity surface of the die holder; the sealing punch is arranged on the inner cavity surface of the die holder close to the end surface of the die holder. The die holder comprises an upper die holder, a lower die holder and a guide pillar; the upper die holder is fixed on an upper slide block of the press machine, and the lower die holder is fixed on a workbench of the press machine; a groove is formed in the middle of the inner cavity surface of the die holder; the bottom of the groove is provided with a first through hole. The utility model discloses a shaping of the big reducing rate of major diameter and little attenuate rate bellows has effectively improved the shape precision of bellows and has reduced the wall thickness attenuate degree of bellows. Meanwhile, for corrugated pipes with consistent calibers and different corrugated shapes and sizes, the requirements can be met only by replacing the eccentric insert, the development cost of the die is saved, the die is universal, and the actual requirements are met.
Description
Technical Field
The utility model particularly relates to a bellows axial low pressure die that appears.
Background
The corrugated pipe is a core elastic element of the expansion joint, has the functions of displacement compensation, shock absorption, noise reduction, sealing and the like, and is very widely applied. There are many types of bellows, and different bellows shapes and dimensional configurations will result in different functional roles for the bellows. When corrugated pipes with consistent calibers and different shapes and sizes of the corrugations are required to be formed, different equipment is changed to adapt to different waveforms, the required cost is higher, and the more complex the waveform is, the more difficult the forming is.
The axial low-pressure pressing is a forming method combining pressing and bulging, the utility model discloses an axial low-pressure pressing mould of corrugated pipes, which can realize the forming of corrugated pipes with consistent calibers and different shapes and sizes of waveforms.
SUMMERY OF THE UTILITY MODEL
The utility model provides a bellows axial low pressure die that appears mainly advances to give the relation of pressing in taking shape through the axial of reasonable sealed drift that matches, obtains the bellows of the big reducing rate of major diameter and little attenuate rate. Meanwhile, the corrugated pipes with the same calibers and different corrugation sizes can be formed by changing the size structure of the eccentric insert. Thereby overcoming the deficiencies in the prior art.
An axial low pressure corrugating die comprising: the die comprises a die holder, an eccentric insert and a sealing punch; the die holder comprises an upper die holder, a lower die holder and a guide column, the eccentric insert comprises a left/right movable insert and a middle fixed insert, and the sealing punch comprises a left/right sealing punch.
Furthermore, the upper die base is fixed on an upper sliding block of the press through a bolt and moves up and down along with the sliding block to complete the actions of die opening and die closing. The lower die base is fixed on a press workbench, and a groove is formed in the middle of the inner cavity surface of the die base and used for fixing the middle fixing insert. The groove bottom is provided with a first through hole for ejecting the eccentric insert.
Furthermore, the diameter of the outer contour of the eccentric insert is slightly smaller than that of the die holder inner cavity, and the diameter of the inner contour is slightly larger than the outer diameter of the tube blank. The middle fixed insert is divided into four parts, so that the middle fixed insert can be conveniently nested into and taken out of the die holder groove. The left/right movable insert blocks are respectively divided into two parts, the outer contour surface is in surface contact with the inner cavity of the die holder, the inner contour surface is in surface contact with the tube blank, and the side surface is in surface contact with the rear end of the sealing punch and can slide along the axial direction of the die holder. The corrugated shape and wave height of the corrugated pipe can be controlled by changing the structural shape of the eccentric insert.
Furthermore, the sealing punch is in a boss shape, the diameter of the outer contour of the front end is slightly smaller than the inner diameter of the tube blank, a semi-detachable groove is formed in the sealing punch, a sealing ring can be placed conveniently, and the diameter of the outer contour of the rear end is slightly smaller than the diameter of the cavity in the die holder. The front end of the sealing punch is pushed into the tube blank, and after the die is closed, the sealing ring and the left/right moving insert are in close contact with the tube blank to form a sealing effect. The end surface of the tube blank and the end surface of one side of the left/right insert are contacted with the rear end of the sealing punch, and the left/right moving insert and the tube blank can axially feed by applying thrust to the sealing punch, and the centers of the left/right moving insert and the tube blank are on the same straight line. The sealing punch is provided with a second through-opening for applying a forming medium.
On the other hand, the utility model discloses a working method is: firstly, putting a corresponding eccentric insert in a die cavity of a die holder, wherein the distance from a left/right moving insert to a middle fixed insert is the material supplementing length required by the forming of the corrugated pipe. Then the sealing punch sleeved with the sealing ring is pushed into a tube blank with a certain length and is placed into a die cavity of the lower die base, and the side face of the left/right moving insert is in contact with the rear end of the sealing punch. After die assembly, a forming medium with certain pressure is applied to the tube blank through a through hole in the sealing punch, and the left/right sealing punch is used for axially supplementing materials to the tube until the left/right moving insert is in contact with the middle fixed insert. The pipe blank deforms under the combined action of internal pressure and axial feed supplement, so that the required corrugated pipe is obtained.
The utility model has the advantages that:
the utility model discloses an axial low pressure die that appears of bellows has realized the shaping of the big reducing rate of major diameter and little attenuate rate bellows, has effectively improved the shape precision of bellows and has reduced the wall thickness attenuate degree of bellows. Meanwhile, for corrugated pipes with consistent calibers and different corrugated shapes and sizes, the requirements can be met only by replacing the eccentric insert, the development cost of the die is saved, the die is universal, and the actual requirements are met.
Drawings
Fig. 1 is a schematic structural view of the middle mold base of the present invention;
FIG. 2 is a schematic structural view of an eccentric insert of the present invention;
fig. 3 is a schematic structural view of the sealing punch according to the present invention;
reference numerals:
i-1, an upper die base; i-2, a lower die holder; i-3, guide pillars; i-4, a groove; i-5, a first through hole;
II-1, moving the insert left/right; II-2, fixing an insert in the middle;
III-1, semi-detachable grooves; III-2, sealing the rear end of the punch; III-3, a second through hole; III-4, sealing ring.
Detailed Description
It is to be understood that the embodiments described below are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically indicated and limited.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
As shown in fig. 1, 2 and 3, the present embodiment provides an axial low-pressure forming die for corrugated pipes, which is mainly used for obtaining a corrugated pipe with a large diameter, a large diameter-changing rate and a small thickness-reducing rate by reasonably matching the relationship between the axial feeding of a sealing punch and the forming internal pressure. Meanwhile, the corrugated pipes with the same calibers and different corrugation sizes can be formed by changing the size structure of the eccentric insert. Thereby overcoming the deficiencies in the prior art.
An axial low pressure corrugating die comprising: the die comprises a die holder, an eccentric insert and a sealing punch; the die holder comprises an upper die holder I-1, a lower die holder I-2 and a guide pillar I-3, the eccentric insert comprises a left/right movable insert II-1 and a middle fixed insert II-2, and the sealing punch comprises a left/right sealing punch.
The upper die holder I-1 is fixed on an upper slide block of the press through a bolt and moves up and down along with the slide block to complete the actions of die opening and die closing. The lower die base I-2 is fixed on a press workbench, and a groove I-4 is formed in the middle of the inner cavity surface of the die base and used for fixing the middle fixing insert II-2. The groove bottom is provided with a first through hole I-5 for ejecting the eccentric insert.
The outer contour diameter of the eccentric insert is slightly smaller than the inner cavity diameter of the die holder, and the inner contour diameter is slightly larger than the outer diameter of the tube blank. The middle fixed insert II-2 is divided into four sections, so that the middle fixed insert II-2 can be conveniently embedded into the groove I-4 of the die holder and taken out. The left/right movable inserts II-1 are respectively divided into two parts, the outer contour surface is in contact with the inner cavity surface of the die holder, the inner contour surface is in contact with the tube blank, and the side surface is in contact with the rear end III-2 of the sealing punch and can slide along the axial direction of the die holder. The corrugated shape and wave height of the corrugated pipe can be controlled by changing the structural shape of the eccentric insert.
The sealing punch is in a boss shape, the diameter of the outer contour of the front end of the sealing punch is slightly smaller than the inner diameter of the tube blank, a semi-detachable groove III-1 is formed in the sealing punch, the sealing ring III-4 can be placed conveniently, and the diameter of the outer contour of the rear end of the sealing punch is slightly smaller than the diameter of the cavity in the die holder. The front end of the sealing punch is pushed into the tube blank, and after the die is closed, the sealing ring III-4 and the left/right movable insert II-1 are in close contact with the tube blank to form a sealing effect. The end surface of the tube blank and the end surface of one side of the left/right insert block are contacted with the rear end III-2 of the sealing punch head, and the left/right moving insert block II-1 and the tube blank can axially feed by applying thrust to the sealing punch head, and the centers of the three are on the same straight line. The sealing punch is provided with a second through-opening III-3 for applying a forming medium.
The utility model has the advantages that:
the utility model discloses an axial low pressure die that appears of bellows has realized the shaping of the big reducing rate of major diameter and little attenuate rate bellows, has effectively improved the shape precision of bellows and has reduced the wall thickness attenuate degree of bellows. Meanwhile, for corrugated pipes with consistent calibers and different corrugated shapes and sizes, the requirements can be met only by replacing the eccentric insert, the development cost of the die is saved, the die is universal, and the actual requirements are met.
Example 2
The working method of the embodiment 1 is as follows: firstly, a corresponding eccentric insert is placed in a die cavity of a die holder, and the distance from a left/right moving insert II-1 to a middle fixed insert II-2 is the material supplementing length required by the forming of the corrugated pipe. Then pushing the sealing punch sleeved with the sealing ring III-4 into the tube blank with a certain length, and placing the tube blank into a cavity of the lower die base I-2, wherein the side surface of the left/right movable insert II-1 is in contact with the rear end III-2 of the sealing punch. After die assembly, a forming medium with certain pressure is applied to the tube blank through a through hole III-3 in the sealing punch, and the left/right sealing punch is used for axially supplementing materials to the tube blank until the left/right moving insert II-1 is in contact with the middle fixed insert II-2. The pipe blank deforms under the combined action of internal pressure and axial feed supplement, so that the required corrugated pipe is obtained.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (4)
1. An axial low pressure die for forming corrugated tubing, comprising: the die comprises a die holder, an eccentric insert and a sealing punch;
the eccentric insert is arranged in the middle of the inner cavity surface of the die holder;
the sealing punch is arranged on the inner cavity surface of the die holder close to the end surface of the die holder.
2. Axial low-pressure die for the forming of corrugated tubes according to claim 1, characterized in that said die holder comprises an upper die holder (I-1), a lower die holder (I-2) and guide posts (I-3);
the upper die holder (I-1) is fixed on the upper slide block of the press,
the lower die base (I-2) is fixed on a press workbench;
a groove (I-4) is formed in the middle of the inner cavity surface of the die holder;
the bottom of the groove is provided with a first through hole (I-5).
3. Axial low pressure profiling die for corrugated tubing according to claim 1,
the eccentric insert comprises a left/right moving insert (II-1) and a middle fixed insert (II-2), and the eccentric insert is a flexible die;
the diameter of the outer contour of the eccentric insert is smaller than that of the die holder inner cavity, and the diameter of the inner contour is larger than the outer diameter of the pipe blank;
the middle fixed insert (II-2) comprises four same quarter circular rings which are embedded into the groove (I-4) of the die holder and taken out;
the left/right movable insert (II-1) comprises two same semicircular rings, the outer contour surface of the left/right movable insert (II-1) is in contact with the inner cavity surface of the die holder, and the side surface of the left/right movable insert is in contact with the rear end (III-2) of the sealing punch and slides along the axial direction; the change of the structure shape of the eccentric insert block controls the ripple shape and the wave height of the ripple tube.
4. Axial low pressure profiling die for corrugated tubing according to any of claims 1 or 3,
the sealing punch comprises a left sealing punch and a right sealing punch, the sealing punch is of a boss structure, the outer contour diameter of the front end of the sealing punch is smaller than the inner diameter of the tube blank, a semi-detachable groove (III-1) is formed in the sealing punch, and a sealing ring (III-4) is placed in the semi-detachable groove (III-1);
the diameter of the outer contour of the rear end (III-2) of the sealing punch is smaller than that of the die holder inner cavity;
the end surface of one side of the left/right moving insert (II-1) and the rear end (III-2) of the sealing punch are respectively contacted with the end surface of the tube blank, the left/right moving insert (II-1) and the tube blank move along the axial direction of the tube blank, and the centers of the left/right moving insert (II-1) and the tube blank are on the same straight line; the sealing punch is provided with a second through hole (III-3) for applying a forming medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120873096.8U CN214639457U (en) | 2021-04-26 | 2021-04-26 | Axial low-pressure shaping die for corrugated pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120873096.8U CN214639457U (en) | 2021-04-26 | 2021-04-26 | Axial low-pressure shaping die for corrugated pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214639457U true CN214639457U (en) | 2021-11-09 |
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ID=78470981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120873096.8U Active CN214639457U (en) | 2021-04-26 | 2021-04-26 | Axial low-pressure shaping die for corrugated pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214639457U (en) |
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2021
- 2021-04-26 CN CN202120873096.8U patent/CN214639457U/en active Active
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