CN110976678A - Large-angle necking die for beveled thin-wall pipe fitting - Google Patents
Large-angle necking die for beveled thin-wall pipe fitting Download PDFInfo
- Publication number
- CN110976678A CN110976678A CN201911384824.2A CN201911384824A CN110976678A CN 110976678 A CN110976678 A CN 110976678A CN 201911384824 A CN201911384824 A CN 201911384824A CN 110976678 A CN110976678 A CN 110976678A
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- China
- Prior art keywords
- die
- wall
- necking
- pipe fitting
- inner support
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/04—Reducing; Closing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
Abstract
The invention discloses a large-angle necking die for an oblique-mouth thin-wall pipe fitting, wherein an inner support core die is positioned on a lower template, the outer wall of the inner support core die is provided with a first supporting surface for supporting the inner wall of the pipe fitting, an outer holding die is sleeved outside the inner support core die, the inner wall of the outer holding die is provided with a second supporting surface for supporting the outer wall of the pipe fitting, an upper template is positioned above the lower template, a necking female die is positioned at the bottom of the upper template, and the bottom of the necking female die is provided with a necking die groove which is correspondingly arranged with the inner support. Through the large-angle necking die for the bevel-opening thin-wall pipe fitting with the optimized design, the inner support core die and the outer holding die are combined to support the inner wall and the outer wall of the pipe wall, the pipe wall is protected in the pipe fitting necking process, the pipe wall is effectively prevented from deforming, the follow-up shaping process is reduced, and the processing efficiency is improved.
Description
Technical Field
The invention relates to the field of pipe fitting processing, in particular to a large-angle necking die for a thin-wall pipe fitting with an oblique opening.
Background
When the large-angle necking is performed on the thin-wall pipe fitting, a spinning process is generally adopted. During spinning, the pipe wall is easy to deform, and an inner support is usually added to the inside of the pipe fitting. However, due to the limitation of the thin wall of the tube, even a small gap between the tube wall and the inner support can still cause deformation of the tube wall during necking. In order to repair such deformation, a reshaping process is usually added subsequently, which increases the number of necking processes and reduces the processing efficiency.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a large-angle necking die for a thin-wall pipe with an oblique mouth.
The invention provides a large-angle necking die for a bevel thin-wall pipe fitting, which comprises: the device comprises an upper template, a necking female die, a lower template, an inner support core die and an outer holding die;
the inner support mandrel is positioned on the lower template, the outer wall of the inner support mandrel is provided with a first supporting surface for supporting the inner wall of the pipe fitting, the outer holding mandrel is sleeved outside the inner support mandrel, the inner wall of the outer holding mandrel is provided with a second supporting surface for supporting the outer wall of the pipe fitting, the upper template is positioned above the lower template, the necking female die is positioned at the bottom of the upper template, and the bottom of the necking female die is provided with a necking die groove corresponding to the inner support mandrel.
Preferably, still embrace the return overcoat outward, embrace the mould outward and include a plurality of outer blocks of embracing, a plurality of outer blocks of embracing are around interior support mandrel setting, and a plurality of outer block outer walls of embracing form the first spigot surface that the ring set up altogether, the external diameter of first spigot surface is crescent from the top down, embraces the return overcoat outward and establishes outside embracing the mould outward, embrace outside the return overcoat inner wall be equipped with first spigot surface complex second spigot surface.
Preferably, the outer embracing return outer sleeve is connected with the upper template.
Preferably, the necking die is provided with an installation through groove, the outer embracing return outer sleeve is provided with a vertically arranged connecting rod, and the connecting rod extends into the installation through groove and the upper end of the connecting rod is provided with a limiting block.
Preferably, the connecting rod is externally sleeved with a pressure-bearing spring, and two ends of the pressure-bearing spring respectively abut against the necking female die and the outer embracing return outer sleeve.
Preferably, the bottom of the necking die is provided with a first limiting groove formed around the lower end of the installation through groove, the top of the outer holding return outer sleeve is provided with a second limiting groove arranged corresponding to the first limiting groove, and two ends of the pressure-bearing spring are respectively positioned in the first limiting groove and the second limiting groove.
Preferably, the inner support core comprises a plurality of inner support blocks circumferentially distributed, the outer walls of the plurality of inner support blocks together forming said first support surface.
Preferably, the top of the lower template is provided with a containing groove for containing the inner supporting core mold, the lower end of the inner supporting block is located in the containing groove, the outer wall of the inner supporting block is provided with a return spring, and one end, far away from the inner supporting block, of the return spring abuts against the inner wall of the containing groove.
Preferably, the support core rod is further included, an opening is formed in the middle of the accommodating groove, the support core rod is vertically arranged, the upper end of the support core rod extends into the accommodating groove from the opening, and the plurality of inner support blocks are arranged around the support core rod.
Preferably, the top of the lower template is also provided with a vertically arranged limiting column.
According to the large-angle necking die for the thin-wall pipe fitting with the bevel opening, the inner supporting core die is positioned on the lower die plate, the outer wall of the inner supporting core die is provided with a first supporting surface used for supporting the inner wall of the pipe fitting, the outer holding die is sleeved outside the inner supporting core die, the inner wall of the outer holding die is provided with a second supporting surface used for supporting the outer wall of the pipe fitting, the upper die plate is positioned above the lower die plate, the necking female die is positioned at the bottom of the upper die plate, and the bottom of the necking female die is provided with a necking die groove corresponding to. Through the large-angle necking die for the bevel-opening thin-wall pipe fitting with the optimized design, the inner support core die and the outer holding die are combined to support the inner wall and the outer wall of the pipe wall, the pipe wall is protected in the pipe fitting necking process, the pipe wall is effectively prevented from deforming, the follow-up shaping process is reduced, and the processing efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of a large-angle necking die for a thin-walled pipe with an oblique opening provided by the invention.
Fig. 2 is a schematic structural diagram of the matching of the inner support core die, the outer holding die and the necking pipe of the large-angle necking die for the thin-wall pipe with the bevel opening provided by the invention.
Detailed Description
As shown in fig. 1 and 2, fig. 1 is a schematic structural diagram of a large-angle necking die for a thin-walled pipe with an oblique mouth provided by the present invention, and fig. 2 is a schematic structural diagram of a matching structure of an inner support core die, an outer holding die and a necking pipe of the large-angle necking die for the thin-walled pipe with an oblique mouth provided by the present invention.
Referring to fig. 1 and 2, the invention provides a large-angle necking die for a thin-wall pipe with an oblique mouth, which comprises: an upper template 1, a necking female die 2, a lower template 3, an inner support core die and an outer holding die;
the inner support mandrel is positioned on the lower template 3, the outer wall of the inner support mandrel is provided with a first supporting surface for supporting the inner wall of a pipe fitting, the outer holding die is sleeved outside the inner support mandrel, the inner wall of the outer holding die is provided with a second supporting surface for supporting the outer wall of the pipe fitting, the upper template 1 is positioned above the lower template 3, the necking female die 2 is positioned at the bottom of the upper template 1, and the bottom of the necking female die 2 is provided with a necking die groove corresponding to the inner support mandrel.
In the concrete working process of the wide-angle necking die for the bevel thin-wall pipe fitting of the embodiment, the pipe fitting 20 to be subjected to necking is sleeved outside the inner support core die, so that the first support surface supports the inner wall of the pipe fitting, then the second support surface of the outer holding die is supported by the outer wall of the pipe fitting, and during necking, the upper die plate is provided with the necking female die to descend, so that the necking female die performs stamping necking on the upper end of the pipe fitting through the necking die groove, and necking processing is realized.
In this embodiment, in the proposed large-angle necking die for the beveled thin-wall pipe fitting, the inner support core die is located on the lower die plate, the outer wall of the inner support core die is provided with a first supporting surface for supporting the inner wall of the pipe fitting, the outer holding die is sleeved outside the inner support core die, the inner wall of the outer holding die is provided with a second supporting surface for supporting the outer wall of the pipe fitting, the upper die plate is located above the lower die plate, and the necking female die is located at the bottom of the upper die plate and is provided with a necking die groove corresponding to the inner support core die. Through the large-angle necking die for the bevel-opening thin-wall pipe fitting with the optimized design, the inner support core die and the outer holding die are combined to support the inner wall and the outer wall of the pipe wall, the pipe wall is protected in the pipe fitting necking process, the pipe wall is effectively prevented from deforming, the follow-up shaping process is reduced, and the processing efficiency is improved.
In a specific embodiment, the mold further comprises an outer embracing return outer sleeve 6, the outer embracing mold comprises a plurality of outer embracing blocks 5, the plurality of outer embracing blocks 5 are arranged around the inner supporting core mold, the outer walls of the plurality of outer embracing blocks 5 form a first guide surface which is annularly arranged together, the outer diameter of the first guide surface is gradually increased from top to bottom, the outer embracing return outer sleeve 6 is sleeved outside the outer embracing mold, and the inner wall of the outer embracing return outer sleeve 6 is provided with a second guide surface matched with the first guide surface; when supporting the pipe fitting outer wall, a plurality of outer blocks of embracing are arranged around the pipe fitting, and along with embracing the decline of return overcoat outward, first spigot surface and the cooperation of second spigot surface, embrace the inside propulsion of a plurality of outer blocks of embracing outward and lock outward the return overcoat, guarantee the reliability that the outer block of embracing was held tightly.
During embracing the concrete mode of setting of return overcoat outward, embrace return overcoat 6 outward and be connected with cope match-plate pattern 1, when the cope match-plate pattern descends, drive throat die simultaneously and embrace the return overcoat outward and descend, embrace the return overcoat outward and inwards promote outer the embracing block from the periphery and embrace tightly on the one hand, on the other hand throat die is from the top to pipe fitting upper end throat, improvement machining efficiency.
In a further concrete embodiment, be equipped with the installation on the throat die 2 and lead to the groove, embrace the connecting rod 7 that is equipped with vertical setting on the return overcoat 6 outward, connecting rod 7 stretches into installation is led to the groove and its upper end and is equipped with the stopper, embraces the return overcoat outward and links through connecting rod and throat die, and when the cope match-plate pattern descends, embrace the return overcoat outward and descend and hug closely outer the piece of embracing, then along with the cope match-plate pattern continues to descend, the throat die continues to descend for the connecting rod, carries out the throat to the pipe fitting upper end, through the design of connecting rod for embrace the return overcoat outward and hug closely and produce the certain time difference between the shaping of throat die, guarantee that the pipe fitting is fixed a position.
In order to guarantee the reliability that the outer embracing return outer sleeve embraces the block tightly, the outer cover of connecting rod 7 is equipped with pressure-bearing spring 8, and pressure-bearing spring 8 both ends lean on respectively and lean on throat die 2 and outer embracing return outer sleeve 6, and when the throat die continued to descend along the connecting rod, further compressed tightly outwards embracing the return outer sleeve through pressure-bearing spring.
In a specific arrangement mode of the pressure-bearing spring, a first limiting groove formed around the lower end of the installation through groove is formed in the bottom of the necking female die 2, a second limiting groove arranged corresponding to the first limiting groove is formed in the top of the outer holding return outer sleeve 6, and two ends of the pressure-bearing spring 8 are respectively located in the first limiting groove and the second limiting groove.
In a specific design mode of the internal support core die, the internal support core die comprises a plurality of internal support blocks 4 distributed along the circumference, and the outer walls of the plurality of internal support blocks 4 jointly form the first support surface; the design of a plurality of inner supporting blocks improves the fitting property of the first supporting surface and the inner wall of the pipe fitting.
In a further specific embodiment, a containing groove for containing an internal support mandrel is formed in the top of the lower template 3, the lower end of the internal support block 4 is located in the containing groove, a return spring 9 is arranged on the outer wall of the internal support block 4, and one end, far away from the internal support block 4, of the return spring 9 abuts against the inner wall of the containing groove; furthermore, the support core rod device further comprises a support core rod 10, an opening is formed in the middle of the accommodating groove, the support core rod 10 is vertically arranged, the upper end of the support core rod extends into the accommodating groove from the opening, and a plurality of inner support blocks 4 are arranged around the support core rod 10; during the installation, will support the plug and take out from a plurality of inner support piece middle parts, support the piece inwards and remove under return spring effect for the external diameter of first holding surface reduces, and the installation of being convenient for, after the installation, will support the plug and insert a plurality of inner support piece middle parts, makes the external diameter increase of first holding surface, outwards with the laminating of pipe fitting inner wall, when the pipe fitting of being convenient for, improve inner support piece's support stability.
In other specific embodiments, the top of the lower template 3 is also provided with a vertically arranged limiting column 11 for limiting the descending and die assembly of the upper template driven necking die.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a bevel connection thin wall pipe fitting wide-angle throat mould which characterized in that includes: the device comprises an upper template (1), a necking female die (2), a lower template (3), an inner support core die and an outer holding die;
the inner support mandrel is positioned on the lower template (3), the outer wall of the inner support mandrel is provided with a first supporting surface for supporting the inner wall of a pipe fitting, the outer holding die is sleeved outside the inner support mandrel, the inner wall of the outer holding die is provided with a second supporting surface for supporting the outer wall of the pipe fitting, the upper template (1) is positioned above the lower template (3), the necking female die (2) is positioned at the bottom of the upper template (1), and the bottom of the necking female die (2) is provided with a necking die groove corresponding to the inner support mandrel.
2. The heavy-angle necking die for the beveled thin-wall pipe fitting according to claim 1, further comprising an outer embracing return sleeve (6), wherein the outer embracing die comprises a plurality of outer embracing blocks (5), the plurality of outer embracing blocks (5) are arranged around the inner supporting core die, outer walls of the plurality of outer embracing blocks (5) form a first guide surface which is annularly arranged together, the outer diameter of the first guide surface is gradually increased from top to bottom, the outer embracing return sleeve (6) is sleeved outside the outer embracing die, and a second guide surface matched with the first guide surface is arranged on the inner wall of the outer embracing return sleeve (6).
3. The large-angle necking die for the beveled thin-wall pipe fitting according to claim 2, wherein the outer holding return outer sleeve (6) is connected with the upper template (1).
4. The large-angle necking die for the beveled thin-wall pipe fitting according to claim 3, wherein a mounting through groove is formed in the necking female die (2), a vertically arranged connecting rod (7) is arranged on the outer embracing return outer sleeve (6), the connecting rod (7) extends into the mounting through groove, and a limiting block is arranged at the upper end of the connecting rod.
5. The large-angle necking die for the beveled thin-wall pipe fitting according to claim 4, wherein a pressure-bearing spring (8) is sleeved outside the connecting rod (7), and two ends of the pressure-bearing spring (8) respectively abut against the necking female die (2) and the outer holding return outer sleeve (6).
6. The wide-angle necking die for the beveled thin-wall pipe fitting according to claim 5, wherein a first limiting groove formed around the lower end of the mounting through groove is formed at the bottom of the necking female die (2), a second limiting groove arranged corresponding to the first limiting groove is formed at the top of the outer holding return outer sleeve (6), and two ends of a pressure-bearing spring (8) are respectively positioned in the first limiting groove and the second limiting groove.
7. The large-angle necking die for the beveled thin-walled pipe fitting according to claim 1, wherein the inner support core die comprises a plurality of inner support blocks (4) distributed along the circumference, and the outer walls of the plurality of inner support blocks (4) jointly form the first support surface.
8. The large-angle necking die for the beveled thin-wall pipe fitting according to claim 7, wherein a receiving groove for receiving the inner support mandrel is formed in the top of the lower template (3), the lower end of the inner support block (4) is located in the receiving groove, a return spring (9) is arranged on the outer wall of the inner support block (4), and one end, far away from the inner support block (4), of the return spring (9) abuts against the inner wall of the receiving groove.
9. The heavy-angle necking die for the beveled thin-walled tube as claimed in claim 6, further comprising a support mandrel (10), wherein an opening is formed in the middle of the receiving groove, the support mandrel (10) is vertically arranged, the upper end of the support mandrel extends into the receiving groove from the opening, and a plurality of inner support blocks (4) are arranged around the support mandrel (10).
10. The large-angle necking die for the beveled thin-wall pipe fitting according to claim 1, wherein a vertically arranged limiting column (11) is further arranged at the top of the lower template (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911384824.2A CN110976678B (en) | 2019-12-28 | 2019-12-28 | Large-angle necking die for beveled thin-wall pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911384824.2A CN110976678B (en) | 2019-12-28 | 2019-12-28 | Large-angle necking die for beveled thin-wall pipe fitting |
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| Publication Number | Publication Date |
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| CN110976678A true CN110976678A (en) | 2020-04-10 |
| CN110976678B CN110976678B (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911384824.2A Active CN110976678B (en) | 2019-12-28 | 2019-12-28 | Large-angle necking die for beveled thin-wall pipe fitting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117583485A (en) * | 2024-01-17 | 2024-02-23 | 山东朝日不锈钢有限公司 | Necking die and necking method for stainless steel pipe fitting |
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| CN106862398A (en) * | 2015-12-14 | 2017-06-20 | 湖北中生汽车电器有限公司 | Electromagnetism valve assembly necking connection mode |
| CN108405731A (en) * | 2018-05-30 | 2018-08-17 | 中国航发动力股份有限公司 | A kind of thin-wall cylindrical member necking die |
| CN209849719U (en) * | 2019-01-30 | 2019-12-27 | 佛山市景和汽配有限公司 | A mould for pipe fitting throat |
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2019
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2012110919A (en) * | 2010-11-24 | 2012-06-14 | Fuji Bolt Seisakusho:Kk | Device and method of manufacturing mechanical joint of reinforcing bar |
| CN105436334A (en) * | 2014-09-29 | 2016-03-30 | 重庆和佳机械部件制造有限公司 | Sleeve type pipe shrinkage mold preventing deformation of steel pipe |
| CN106862398A (en) * | 2015-12-14 | 2017-06-20 | 湖北中生汽车电器有限公司 | Electromagnetism valve assembly necking connection mode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117583485A (en) * | 2024-01-17 | 2024-02-23 | 山东朝日不锈钢有限公司 | Necking die and necking method for stainless steel pipe fitting |
| CN117583485B (en) * | 2024-01-17 | 2024-03-26 | 山东朝日不锈钢有限公司 | Necking die and necking method for stainless steel pipe fitting |
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| Publication number | Publication date |
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| CN110976678B (en) | 2021-07-20 |
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