CN221064080U - Hydroforming external seal structure - Google Patents
Hydroforming external seal structure Download PDFInfo
- Publication number
- CN221064080U CN221064080U CN202322537166.4U CN202322537166U CN221064080U CN 221064080 U CN221064080 U CN 221064080U CN 202322537166 U CN202322537166 U CN 202322537166U CN 221064080 U CN221064080 U CN 221064080U
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- sealing
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- seal
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- 238000007789 sealing Methods 0.000 claims abstract description 148
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 230000006978 adaptation Effects 0.000 claims description 4
- 239000006052 feed supplement Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 3
- 230000001502 supplementing effect Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Gasket Seals (AREA)
Abstract
The utility model discloses a hydroforming external sealing structure which comprises a sealing head and a sealing ring, wherein the sealing head comprises a vertical section and a horizontal section, a sealing hole and a liquid injection hole which are matched with a tube blank are formed in the horizontal section of the sealing head, the liquid injection hole is communicated with the sealing hole and enables a material supplementing end face to be formed in the sealing hole, the sealing ring is embedded in the sealing hole, and a positioning through hole matched with the tube blank is formed in the sealing ring. According to the utility model, the sealing ring is arranged in the sealing hole of the sealing head, so that the contact between the positioning through hole of the sealing ring and the outer circle of the tube blank is sealed, the sealing mode is not limited by the tube diameter and the wall thickness, and the shape of the tube blank of the sealing section is not changed.
Description
Technical Field
The utility model relates to the technical field of hydraulic forming equipment, in particular to a hydraulic forming external sealing structure.
Background
When the metal pipe fitting is processed by adopting the hydraulic forming method, two ends of the pipe blank are required to be sealed, so that a closed cavity is formed in the pipe blank, and then high-pressure liquid is filled in the closed cavity to expand the pipe blank into a designed shape.
Common sealing methods can be divided into inner and outer seals. The internal seal can be described simply as the internal plugging of both ends of the tube blank into a plug, thereby forming a sealed cavity. Common internal seals can be classified into hard seals and soft seals according to the sealing principle.
The hard sealing head is made of alloy steel with higher hardness, and the pipe blank is extruded by the sealing head to generate plastic deformation, so that sealing is formed between the sealing head and the pipe blank. The common hard seals are two kinds of the following;
1. Flaring sealing type; referring to fig. 1, the sealing mode relies on the conical structure of the sealing head 01 to flare the end part of the tube blank 02 into a cone shape, so that effective sealing is formed, but the sealing mode is not beneficial to hydroforming feeding;
2. Extruding and sealing; referring to fig. 2, the sealing mode relies on the sealing head 01 to extrude the pipe orifice of the pipe blank 02 to generate local plastic deformation to form effective sealing, so that the problem of material supplementing in hydraulic forming can be solved, but the sealing mode cannot be used for pipe blanks with thinner wall thickness, when the wall thickness of the pipe blank 02 is smaller, the sealing head 01 is easy to generate local deformation when extruding the pipe blank 02, the forming quality is reduced, and when the sealing head 01 extrudes the pipe blank mouth with thin wall thickness, the contact area between the sealing head and the pipe blank is smaller due to the thinner wall thickness of the pipe blank 02, so that effective sealing is difficult to form;
Meanwhile, there is also a sealing ring 06 made of extruded polymer materials on the market through soft sealing, so that the sealing ring is in contact with the inside of a pipe blank 02 to form effective sealing, the working principle is as shown in fig. 3, when the sealing ring is sealed, a nut 05 is pulled by a water injection rod assembly 07, the nut 05 extrudes the sealing ring 06, the sealing ring 06 is in contact with the inside of the pipe blank 02 to form sealing, when the pipe blank 02 is smaller in pipe diameter, the water injection rod assembly 07 with smaller size needs to be designed, and thus the strength of the water injection rod assembly 07 is seriously reduced, the service life of the sealing head is seriously reduced, and even a sealing head with a proper size cannot be designed.
All three sealing structures have defects, namely:
1. and the flaring sealing structure is adopted, and feeding cannot be performed during hydraulic forming.
2. The hard sealing structure with extruded end faces is not suitable for pipe fittings with thinner wall thickness.
3. The soft sealing structure is not suitable for a tube blank with a small tube diameter.
Disclosure of utility model
The utility model aims to solve the technical problem of how to provide a sealing requirement for realizing the hydraulic forming pipe fitting with small pipe diameter and thin wall thickness.
The utility model solves the technical problems by the following technical means: the utility model provides a hydroforming external seal structure, includes sealing head, sealing washer, the sealing head includes vertical section and horizontal segment, set up on the horizontal segment of sealing head with tube blank looks adaptation sealing hole, annotate the liquid hole and communicate and cause the interior feed supplement terminal surface that forms of sealing hole with the sealing hole, the sealing hole is embedded to be equipped with the sealing washer, set up the location through-hole with tube blank looks adaptation on the sealing washer.
The sealing ring is arranged in the sealing hole of the sealing head, so that the contact between the positioning through hole of the sealing ring and the excircle of the tube blank is sealed, the sealing mode is not limited by the tube diameter and the wall thickness, and the shape of the tube blank of the sealing section is not changed.
As an optimal technical scheme, the horizontal section is vertically fixed in the middle of the vertical section and the sealing head is made to form a T-shaped structure.
As the preferable technical scheme, the sealing hole comprises a sealing section and a tube blank guiding section which are sequentially arranged along the axis direction of the horizontal section, the sealing section and the tube blank guiding section are cylindrical holes, and the diameter of the sealing section is larger than that of the tube blank guiding section.
As the preferable technical scheme, the sealing hole further comprises a sealing ring mounting groove matched with the sealing ring, and the sealing ring mounting groove is positioned between the sealing section and the pipe blank guiding section.
As the preferable technical scheme, one end of the sealing ring, which faces the liquid injection hole, is provided with an annular lip-shaped opening, and one end of the lip-shaped opening, which faces the tube blank, extends into the positioning through hole.
As a preferable technical scheme, the end part of the tube blank guiding section is provided with a mouth chamfer.
As a preferable technical scheme, the vertical section is provided with a mounting hole, and is connected and fastened with an output end of an external drive through the mounting hole.
As the preferable technical scheme, the tube blank is propped against the feeding end face and is enclosed with the sealing section to form a circulation channel, and the circulation channel is communicated with the lip-shaped opening.
As a preferable technical scheme, the diameter of the liquid injection hole is smaller than that of the sealing hole.
As a preferred technical scheme, the diameter of the positioning through hole is smaller than that of the sealing section.
The utility model has the advantages that:
(1) According to the utility model, the sealing ring is arranged in the sealing hole of the sealing head, so that the contact between the positioning through hole of the sealing ring and the outer circle of the pipe blank is sealed, the sealing mode is not limited by the pipe diameter and the wall thickness, the shape of the pipe blank of the sealing section is not changed, and the pipe blank can be fed in the forming process by arranging the feeding end face in the sealing hole.
(2) In the utility model, the inner lip of the Y-shaped sealing ring is contacted with the outer circle of the tube blank to seal. The pressure of the forming liquid acts on the inner lip, and the contact tightness between the inner lip and the tube blank is increased along with the increase of the forming pressure, so that the sealing reliability is further improved.
Drawings
FIG. 1 is a schematic diagram of a flaring seal structure provided in the background of the present utility model;
FIG. 2 is a schematic view of a hard seal structure according to the background of the utility model;
FIG. 3 is a schematic structural diagram of a soft sealing structure according to the background of the utility model;
FIG. 4 is a schematic cross-sectional view of a sealing head of a hydroformed external sealing structure according to an embodiment of the present utility model;
FIG. 5 is a schematic view of a seal ring mounting groove of a hydroformed outer seal structure according to an embodiment of the present utility model;
FIG. 6 is a schematic view of a flow channel structure of a hydroformed outer seal structure according to an embodiment of the present utility model;
FIG. 7 is a schematic view of a Y-shaped seal ring of a hydroformed outer seal structure according to an embodiment of the present utility model;
Reference numerals: 01. a sealing head; 02. a tube blank; 03. a cone flare; 04. extruding a pipe orifice; 05. a nut; 06. a seal ring; 07. a water injection rod assembly; 11. a mounting hole; 12. a water injection hole; 13. supplementing the end face of the material; 14. a sealing section; 15. a seal ring mounting groove; 16. a tube blank guiding section; 17. chamfering the mouth part; 2. a Y-shaped sealing ring; 21. a sealing ring opening; 22. an inner lip; 3. a flow channel.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described in the following in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 4 and 5, a hydroformed external sealing structure comprises a sealing head 01 and a Y-shaped sealing ring 2, wherein the sealing ring 2 is embedded in the sealing head 01; the sealing head 01 is in a T shape and comprises a horizontal section and a vertical section which are integrally formed, the horizontal section is vertically fixed in the middle of the vertical section to form the sealing head 01, two mounting holes 11 are formed in the horizontal section, the two mounting holes 11 are symmetrical with respect to the center of the vertical section and are used for connecting the sealing head 01 with external driving, and in the embodiment, the external driving can be a propulsion cylinder, a hydraulic cylinder and the like, but is not limited to the above;
Referring to fig. 6 and 7, an annular lip-shaped opening 21 is formed on one side end surface of the Y-shaped sealing ring 2, a positioning through hole matched with the tube blank 02 is formed in the center of the Y-shaped sealing ring 2, the tube blank 02 can be allowed to be inserted, one end, connected with the tube blank 02, of the lip-shaped opening 21 is an inner lip 22, and in this embodiment, when the Y-shaped sealing ring 2 is installed, the lip-shaped opening 21 faces the water injection direction.
Referring to fig. 4, 5 and 6, the free end of the vertical section is provided with a sealing hole, the sealing hole is a cylindrical hole, the axis of the cylindrical hole is coaxial with the axis of the horizontal section, the cylindrical hole is positioned in the sealing head 01, one end parallel to the vertical section forms a feeding end face 13, the cylindrical hole is sequentially provided with a sealing section 14, a sealing ring mounting groove 15 and a tube blank guiding section 16 along the axis direction, the right end of the horizontal section of the tube blank guiding section 16 and the sealing head 01 is provided with a mouth chamfer 17, the mouth chamfer 17 is used for guiding when the tube blank 02 is inserted, the feeding end face 13 is in contact with the end face of the tube blank 02 for feeding the tube blank 02 during forming, the diameter D1 of the sealing section 14 is smaller than the diameter of the Y-shaped sealing ring 2, the sealing ring mounting groove 15 is cylindrical, the inner lip 22 extends out of the sealing ring mounting groove 15, and the width L1 of the sealing ring mounting groove 15 is slightly larger than the width of the Y-shaped sealing ring 2, in this embodiment, taking 0.2mm as an example, the diameter D2 of the tube blank guiding section 16 is smaller than the diameter of the sealing section 14.
Referring to fig. 5, the vertical section is further provided with a water injection hole 12, the water injection hole 12 is communicated with the cylindrical hole, that is, is communicated with the sealing section 14, the aperture of the water injection hole 12 is smaller than that of the sealing hole, and after the tube blank 02 is installed in the cylindrical hole, the outer surface of the tube blank 02 and the inner surface of the sealing section 14 form a flow channel 3.
The using method comprises the following steps: the sealing head 01 is driven by external driving and moves towards the tube blank 02, the left end of the tube blank 02 is inserted into the tube blank guide section 16 through the opening chamfer 17, the opening chamfer 17 and the tube blank guide section 16 enable the tube blank 02 to move into the cylindrical hole, the tube blank 02 passes through the Y-shaped sealing ring 2 along with the movement of the sealing head 01, the outer surface of the tube blank 02 is in interference fit with the inner lip 22, the tube blank 02 finally contacts with the feeding end face 13, and at the moment, the outer surface of the tube blank 02 and the inner surface of the sealing section 14 form a flow channel 3 of inner high-pressure liquid;
After the sealing head 01 reaches a set position (the left end of the tube blank 02 is propped against the feeding end face 13), a hydraulic forming process is started, at this time, high-pressure liquid flows into the tube blank 02 from the water injection hole 12, along with the gradual increase of the pressure of the high-pressure liquid, part of liquid leaks out from the contact surface of the tube blank 02 and the feeding end face 13, the leaked high-pressure liquid flows into the lip-shaped opening 21 of the Y-shaped sealing ring 2 through the flow channel 3, the bonding degree of the inner lip-shaped opening 22 of the Y-shaped sealing ring 2 and the tube blank 02 increases along with the increase of forming pressure, the sealing reliability also increases, and when the pressure is continuously increased in the tube blank 02, the tube blank 02 is expanded to be bonded with the die cavity, and the internal pressure is reduced after bonding, at this time, the tube fitting is finished.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. The utility model provides a hydroforming external seal structure, its characterized in that, includes sealing head, sealing washer, the sealing head includes vertical section and horizontal segment, set up on the horizontal segment of sealing head with tube blank looks adaptation sealing hole, annotate the liquid hole and communicate and cause the sealing hole in form the feed supplement terminal surface, the sealing hole is embedded to be equipped with the sealing washer, set up the location through-hole with tube blank looks adaptation on the sealing washer.
2. The hydroformed external seal structure according to claim 1, wherein the horizontal segment is vertically fixed in the middle of the vertical segment and causes the seal head to form a T-shaped structure.
3. The hydroformed external sealing structure according to claim 1, wherein the sealing hole comprises a sealing section and a tube blank guiding section which are sequentially arranged along the axis direction of the horizontal section, the sealing section and the tube blank guiding section are cylindrical holes, and the diameter of the sealing section is larger than that of the tube blank guiding section.
4. A hydroformed external seal according to claim 3, wherein the seal bore further comprises a seal ring mounting groove adapted to the seal ring, the seal ring mounting groove being located between the seal segment and the tube blank guiding segment.
5. The hydroformed external seal structure according to claim 4, wherein the end of the seal ring facing the liquid injection hole is provided with an annular lip opening, and the lip opening extends into the positioning through hole toward the end of the tube blank.
6. A hydroformed external seal according to claim 3, wherein said tube blank guiding section ends are provided with mouth chamfer.
7. The hydroformed external seal structure according to claim 1, wherein the vertical section is provided with a mounting hole, and is connected and fastened with an output end of the external drive through the mounting hole.
8. The hydroformed external seal according to claim 5, wherein the tube blank abuts the feed end surface and forms a flow passage with the seal segment, the flow passage communicating with the lip.
9. The hydroformed external seal structure according to claim 1, wherein the pour hole diameter is smaller than the seal hole diameter.
10. The hydroformed external seal structure according to claim 4, wherein the positioning through hole has a diameter smaller than the diameter of the seal segment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322537166.4U CN221064080U (en) | 2023-09-18 | 2023-09-18 | Hydroforming external seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322537166.4U CN221064080U (en) | 2023-09-18 | 2023-09-18 | Hydroforming external seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221064080U true CN221064080U (en) | 2024-06-04 |
Family
ID=91259139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322537166.4U Active CN221064080U (en) | 2023-09-18 | 2023-09-18 | Hydroforming external seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221064080U (en) |
-
2023
- 2023-09-18 CN CN202322537166.4U patent/CN221064080U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |