CN114346046A - Method for forming high-pressure pipe fitting in sheet - Google Patents
Method for forming high-pressure pipe fitting in sheet Download PDFInfo
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- CN114346046A CN114346046A CN202111658561.7A CN202111658561A CN114346046A CN 114346046 A CN114346046 A CN 114346046A CN 202111658561 A CN202111658561 A CN 202111658561A CN 114346046 A CN114346046 A CN 114346046A
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- pipe fitting
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- pressure
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000003466 welding Methods 0.000 claims abstract description 20
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 7
- 238000003698 laser cutting Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention relates to the technical field of internal high-pressure forming, and provides a method for forming a sheet internal high-pressure pipe fitting, which comprises the following steps: s1: preparing a sheet material plate; the shape of the sheet plate is the same as the shape of the cross-section of the central axis of the over-molded tube; s2: two identical sheet plates are oppositely stacked together, and a closed welding seam is formed at the aligned edges of the two sheet plates to obtain a packaged sheet plate group; s3: one of the sheet plates is provided with a water injection hole, and the position of the water injection hole is connected with a water inlet nozzle; s4: placing the mould into a corresponding internal high-pressure forming mould to expand; s5: and obtaining the formed pipe fitting. Therefore, two sheet plates with the same shape are stacked and packaged, and then a formed pipe fitting is obtained through internal high-pressure expansion; so that the design of the bending radius is not limited; at the same time, the pipe fitting with complex shape can be formed. The invention does not take the blank pipe as an object to expand, thereby greatly simplifying the production process of the pipe fitting with a complex structure.
Description
Technical Field
The invention belongs to the technical field of internal high-pressure forming, and particularly relates to a method for forming a sheet internal high-pressure pipe fitting.
Background
Internal high pressure molding is a key technology for lightening automobile parts, and has been widely applied in recent years.
At present, the pipe fitting formed by internal high pressure usually adopts a pipe material as a blank pipe, and the pipe fitting with a preset structure is obtained after expansion. For the pipe member having the bending structure, it is common to bend the blank pipe in advance and then finish the expansion. The bending machine is limited by the capacity of the pipe bending machine, the diameter of the pipe body with the turning radius of the bending structure is 1.5 times, and the design of the pipe turning radius is limited. So that the pipe with smaller turning radius can not be formed by internal high pressure.
Because the wall thickness of the blank pipe is uniform, the pipe with the variable wall thickness cannot be molded.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
Disclosure of Invention
In view of the above-mentioned drawbacks, the present invention provides a method for forming a sheet material internal high-pressure pipe, which includes stacking and packaging two sheet material plates having the same shape, and forming a formed pipe by internal high-pressure expansion; so that the design of the bending radius is not limited; at the same time, the pipe fitting with complex shape can be formed. The invention does not take the blank pipe as an object to expand, thereby greatly simplifying the production process of the pipe fitting with a complex structure.
In order to achieve the purpose, the invention provides a method for forming a high-pressure pipe fitting in a sheet, which comprises the following steps:
s1: preparation of sheet Material Board
The shape of the sheet plate is the same as the shape of the cross section of the central shaft of the over-molded tube;
s2: two identical sheet plates are oppositely stacked together, and a closed welding seam is formed at the aligned edges of the two sheet plates to obtain a packaged sheet plate group;
s3: one of the sheet plates is provided with a water injection hole, and the position of the water injection hole is connected with a water inlet nozzle;
s4: placing the packaged sheet plate group into a corresponding internal high-pressure forming die, and injecting an expansion medium from a water inlet nozzle to gradually expand the two sheet plates;
s5: and after the expansion is finished, cutting off redundant materials to obtain the formed pipe fitting.
According to the method for forming the high-pressure pipe fitting in the sheet material, the sheet material plate is prepared by adopting a laser cutting, plasma cutting or linear cutting mode.
According to the forming method of the high-pressure pipe fitting in the sheet material, the closed welding seam is formed by laser welding, TIG welding or MIG welding.
According to the forming method of the sheet internal high-pressure pipe fitting, the water inlet nozzle is connected with the water injection hole in a welding mode.
According to the method for forming the high-pressure pipe fitting in the sheet material, the expansion medium is gas or liquid.
According to the method for forming the sheet material internal high-pressure pipe fitting, the sheet material plate is formed by sequentially welding a plurality of sub-sheet plates with different shapes and/or different thicknesses.
According to the method for forming the sheet internal high-pressure pipe fitting, the formed pipe fitting is obtained.
The invention aims to provide a method for forming a sheet material internal high-pressure pipe fitting, which is characterized in that two sheet material plates with the same shape are stacked and packaged, and then a formed pipe fitting is obtained through internal high-pressure expansion; so that the design of the bending radius is not limited; at the same time, the pipe fitting with complex shape can be formed. The invention does not take the blank pipe as an object to expand, thereby greatly simplifying the production process of the pipe fitting with a complex structure.
Drawings
FIG. 1 is a schematic structural view of a sheet material panel of the present invention;
FIG. 2 is a schematic view of the stacking of two sheets of the panel of FIG. 1;
FIG. 3 is a schematic view of the structure in the direction A-A in FIG. 2;
FIG. 4 is a schematic view of the hydromolding of the present invention;
FIG. 5 is a schematic structural view of the formed tube of the present invention;
FIG. 6 is a schematic structural view of one embodiment of a sheet material panel of the present invention;
in the figure: 1-sheet plate, 11-water injection hole, 12-closed welding line, 13-water inlet nozzle, 14-sub-sheet plate; 2-forming the pipe fitting.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Referring to fig. 1, the invention provides a method for forming a high-pressure pipe fitting in a sheet, which comprises the following steps:
s1: preparation of sheet plate 1
Referring to fig. 5, the shape of the sheet material plate 1 is the same as the shape of the cross section of the central axis of the over-formed pipe 2;
the thickness of the plate 1 can be calculated according to the designed wall thickness of the formed pipe 2 and the plastic deformation of the expansion type.
Preferably, the sheet material plate 1 is prepared by laser cutting, plasma cutting or linear cutting. Other suitable cutting means may be used by those skilled in the art.
For structures with a smaller bending radius, this can be achieved when cutting the sheet material, so that the design of the bending radius is no longer limited.
S2: with reference to fig. 2, two identical sheet plates 1 are stacked together in a facing manner, and a sealing weld 12 is formed at the aligned edges of the two sheet plates 1, so as to obtain a packaged sheet plate assembly;
preferably, the closed seam 12 of the present invention is formed by laser welding, or by TIG welding or MIG welding.
S3: referring to fig. 3, a water injection hole 11 is formed in one of the sheet plates 1, and a water inlet nozzle 13 is connected to the position of the water injection hole 11;
the water inlet nozzle 13 is connected with the water injection hole 11 in a welding mode and can bear certain internal pressure.
S4: placing the packaged sheet plate group into a corresponding internal high-pressure forming die, and injecting an expansion medium from a water inlet nozzle 13 to gradually expand the two sheet plates 1;
referring to fig. 4, as the expansion medium is continuously charged, the shape of the two sheet plates 1 gradually goes through: setting at the initial stage of liquid filling, the middle stage of liquid filling, the later stage of liquid filling and the final stage of liquid filling.
The swelling medium can be gas or liquid.
S5: and after the expansion is finished, cutting off redundant materials to obtain the formed pipe fitting 2.
Referring to fig. 6, as an example, the sheet material plate 1 of the present invention is formed by sequentially welding a plurality of sub-sheet plates 14 having different shapes and/or different thicknesses; after expansion, the pipe fitting with a complex shape or the pipe fitting with a variable wall thickness can be obtained.
In summary, the invention provides a method for forming a sheet internal high-pressure pipe, which includes stacking and packaging two sheet plates with the same shape, and obtaining a formed pipe through internal high-pressure expansion; so that the design of the bending radius is not limited; at the same time, the pipe fitting with complex shape can be formed. The invention does not take the blank pipe as an object to expand, thereby greatly simplifying the production process of the pipe fitting with a complex structure.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A method for forming a high-pressure pipe fitting in a sheet material is characterized by comprising the following steps:
s1: preparation of sheet Material Board
The shape of the sheet plate is the same as the shape of the cross section of the central shaft of the over-molded tube;
s2: two identical sheet plates are oppositely stacked together, and a closed welding seam is formed at the aligned edges of the two sheet plates to obtain a packaged sheet plate group;
s3: one of the sheet plates is provided with a water injection hole, and the position of the water injection hole is connected with a water inlet nozzle;
s4: placing the packaged sheet plate group into a corresponding internal high-pressure forming die, and injecting an expansion medium from a water inlet nozzle to gradually expand the two sheet plates;
s5: and after the expansion is finished, cutting off redundant materials to obtain the formed pipe fitting.
2. The method of claim 1, wherein the sheet material plate is prepared by laser cutting, plasma cutting or wire cutting.
3. Method for forming a high-pressure tube inside a sheet according to claim 1, characterised in that the closed weld is formed by laser welding, TIG welding or MIG welding.
4. The method for forming the high-pressure pipe fitting in the sheet according to claim 1, wherein the water inlet nozzle is connected with the water injection hole in a welding manner.
5. The method of claim 1, wherein the swelling medium is a gas or a liquid.
6. The method for forming the high-pressure pipe fitting in the sheet material as claimed in any one of claims 1 to 5, wherein the sheet material plate is formed by sequentially welding a plurality of sub-sheet plates with different shapes and/or different thicknesses.
7. The method for forming the sheet internal high-pressure pipe fitting according to any one of claims 1 to 5, wherein the formed pipe fitting is obtained.
8. The method for forming a high-pressure pipe fitting in sheet material according to claim 6, wherein the formed pipe fitting is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111658561.7A CN114346046A (en) | 2021-12-31 | 2021-12-31 | Method for forming high-pressure pipe fitting in sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111658561.7A CN114346046A (en) | 2021-12-31 | 2021-12-31 | Method for forming high-pressure pipe fitting in sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114346046A true CN114346046A (en) | 2022-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111658561.7A Pending CN114346046A (en) | 2021-12-31 | 2021-12-31 | Method for forming high-pressure pipe fitting in sheet |
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| Country | Link |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3807009A (en) * | 1971-04-06 | 1974-04-30 | J Ostbo | Method of manufacturing curved tube sections and the like |
| US5711059A (en) * | 1994-05-09 | 1998-01-27 | Wilhelm Schaefer Maschinenbau Gmbh & Company | Internal high-pressure forming process and apparatus |
| CN201666093U (en) * | 2009-12-09 | 2010-12-08 | 安徽江淮汽车股份有限公司 | Inner plate of car door |
| CN104023899A (en) * | 2012-12-03 | 2014-09-03 | 现代Hysco株式会社 | Tailor welded blanks, method for manufacturing same, and hot stamping parts using same |
| CN106624618A (en) * | 2016-10-27 | 2017-05-10 | 哈尔滨工业大学（威海） | Composite process based on self-resistance heating plate connection and gas bulging forming |
| CN107755512A (en) * | 2016-08-20 | 2018-03-06 | 无锡明豪汽车轻量化技术应用有限公司 | A kind of tubular member moulding process |
| CN109226433A (en) * | 2018-09-30 | 2019-01-18 | 东风汽车集团有限公司 | A kind of drawing modeling design method controlling not uniform thickness tailor welded Pressing Deformation |
| CN112589271A (en) * | 2020-11-10 | 2021-04-02 | 东风汽车集团有限公司 | Laser tailor-welded blank, tailor-welded stamped workpiece and laser tailor-welding method |
| CN112770854A (en) * | 2018-10-09 | 2021-05-07 | 奥托库姆普联合股份公司 | Method for producing a crash frame for a battery compartment of a battery electric vehicle |
-
2021
- 2021-12-31 CN CN202111658561.7A patent/CN114346046A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3807009A (en) * | 1971-04-06 | 1974-04-30 | J Ostbo | Method of manufacturing curved tube sections and the like |
| US5711059A (en) * | 1994-05-09 | 1998-01-27 | Wilhelm Schaefer Maschinenbau Gmbh & Company | Internal high-pressure forming process and apparatus |
| CN201666093U (en) * | 2009-12-09 | 2010-12-08 | 安徽江淮汽车股份有限公司 | Inner plate of car door |
| CN104023899A (en) * | 2012-12-03 | 2014-09-03 | 现代Hysco株式会社 | Tailor welded blanks, method for manufacturing same, and hot stamping parts using same |
| CN107755512A (en) * | 2016-08-20 | 2018-03-06 | 无锡明豪汽车轻量化技术应用有限公司 | A kind of tubular member moulding process |
| CN106624618A (en) * | 2016-10-27 | 2017-05-10 | 哈尔滨工业大学（威海） | Composite process based on self-resistance heating plate connection and gas bulging forming |
| CN109226433A (en) * | 2018-09-30 | 2019-01-18 | 东风汽车集团有限公司 | A kind of drawing modeling design method controlling not uniform thickness tailor welded Pressing Deformation |
| CN112770854A (en) * | 2018-10-09 | 2021-05-07 | 奥托库姆普联合股份公司 | Method for producing a crash frame for a battery compartment of a battery electric vehicle |
| CN112589271A (en) * | 2020-11-10 | 2021-04-02 | 东风汽车集团有限公司 | Laser tailor-welded blank, tailor-welded stamped workpiece and laser tailor-welding method |
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