CN1132123A - Processing tech for short radius elbow - Google Patents
Processing tech for short radius elbow Download PDFInfo
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- CN1132123A CN1132123A CN 95110988 CN95110988A CN1132123A CN 1132123 A CN1132123 A CN 1132123A CN 95110988 CN95110988 CN 95110988 CN 95110988 A CN95110988 A CN 95110988A CN 1132123 A CN1132123 A CN 1132123A
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- filler
- short radius
- melting point
- low melting
- fusing
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Abstract
A technology for machining small-radius elbow pipe by bending metallic pipe includes blanking, fusing filler, pouring the filler, ordinary-temp push shaping by cavity die and recovering filler, and features no environmental pollution and high quality of product.
Description
The present invention relates to the moulding process of metal tube, a kind of specifically elbow processing technology that metal tube is bent into short radius.
Development along with industries such as oil, chemical industry, electric power, nuclear power, water treatments, the elbow requirement of various different sizes, shape is in continuous increase, especially 180 ° of short radius stainless steels, steel alloy is seamless small-bore elbow, China's dependence on import always in the past, ten parts of costlinesses of price.Use always when producing elbow at home and suppress after other fritter things such as irritating sand is filled in the pipe, its defective is a finished product inwall fold, and inner wall thickness is inhomogeneous, rough, influences result of use.The said short radius of this paper is meant the elbow radius R less than 1.5DN, and DN is the latus rectum of pipe here, sees Fig. 1.
The objective of the invention is to design a kind of low melting point of utilizing, the technology that the soft metal is produced short radius elbow as filler is to overcome above-mentioned defective.
Its main technical schemes comprises: a, blanking: caliber on request and length intercepting pipe material; B, fusing filler, low melting point, soft metal object heat fused to molten condition, then, c, are irritated filler: with fused mass pour into operation a under material in; D, normal temperature swaging die pushing moulding: at normal temperatures, the material that is filled with filler is placed pushing is shaped in the swaging die of press; E, recovery filler: heat, make filler outflow, reuse.Used low melting point, soft metal charge can be lead, terne metal, scolding tin, the kirsites of the various trades mark, and other low melting point, soft alloy.The angle that elbow bends can be 45 °, 90 °, 180 °.And especially 180 ° and above angle.
Advantage of the present invention is owing to adopt low melting point, soft metal to make filler, small-bore, the short radius elbow that go out through the pushing of swaging die normal temperature, though its inwall thickens or attenuation to some extent, but surfaces externally and internally is smooth, thicken or the equal rounding off in attenuate place, no wave wrinkle have improved the result of use of product.This technology can be used for the elbow processing of various materials such as carbon steel, stainless steel, steel alloy equally, also can be shaped 45 °, 90 °, 180 ° etc. various with footpath elbows and reducing elbows.Secondly, this technical process is simple, and filler can reclaim use repeatedly, does not have any environmental pollution, after the metal of employing low melting point, soft is made filler, do not irritate the particle gap of technologies such as sand, certain flowable is arranged again, therefore, be shaped easily, make that the extra press power that increases is not too big again.Because of certain rigidity is arranged, can overcome the concavo-convex wrinkle phenomenon that waits that occurs in the inner wall forming process, can overcome the deficiency of hot bending process again, satisfy instructions for use.
Further describe specific embodiments of the invention below.
With stainless steel pipe, terne metal is an example as filler.
A, blanking, caliber on request and length intercepting pipe material;
B, fusing filler: terne metal is heated to 140 ℃-350 ℃, and (adopting different temperatures according to the different trades mark) makes it be molten condition;
C, irritate filler: with the terne metal of molten state pour into operation a under material in;
D, the pushing of normal temperature swaging die are shaped: the material of the good filler of can is cooled to normal temperature is placed on press forming in the swaging die on 3 * 500 tons of hydraulic presses producing the pipe fitting special use;
E, recovery filler heat the material after being shaped again, make to expect to flow out after the interior filler fusing, for multiplexing.
When adopting other low melting point, when the soft alloy is made filler, only need with the heating-up temperature among operation b and the e, adjust according to the fusing point of the alloy of variety classes, the different trades mark, used filler can be melted get final product, all the other operations are constant substantially.
Fig. 1 is elbow structure figure.
Among the figure, R is the elbow radius, D is a tube outer diameter, DN is the pipe latus rectum.
Claims (3)
1, a kind of processing tech for short radius elbow comprises a, blanking, c, irritates filler, and d, normal temperature swaging die pushing moulding is characterized in that also having b between a and c, the fusing filler: with low melting point, soft metal object heat fused to molten condition; Then c, with fused mass be filled into operation a under material in; Carry out e after the shaping again, reclaim filler: the material after heating is shaped flows out for reuse filler fusing back.
2, technology according to claim 1 is characterized in that low melting point used among the operation b, soft metal object are lead, terne metal, scolding tin, the kirsite of the various trades mark.
3, technology according to claim 1, it is characterized in that the angle of bend that bends can be 180 °, 90 °, more than 45 ° and 180 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95110988 CN1132123A (en) | 1995-03-25 | 1995-03-25 | Processing tech for short radius elbow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95110988 CN1132123A (en) | 1995-03-25 | 1995-03-25 | Processing tech for short radius elbow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1132123A true CN1132123A (en) | 1996-10-02 |
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ID=5078312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95110988 Pending CN1132123A (en) | 1995-03-25 | 1995-03-25 | Processing tech for short radius elbow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1132123A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384559C (en) * | 2003-05-23 | 2008-04-30 | 雅马哈发动机株式会社 | Multiple pipe, method of manufacturing the multiple pipe and device for manufacturing multiple pipe |
| CN101804429A (en) * | 2010-03-26 | 2010-08-18 | 东莞市旗丰消声器有限公司 | Bending process of double-layer pipe |
| CN104439919A (en) * | 2014-10-23 | 2015-03-25 | 山东大学 | Method for machining thin-wall flexible element with assistance of low-melting-point alloy |
| CN105081675A (en) * | 2014-05-20 | 2015-11-25 | 哈尔滨飞机工业集团有限责任公司 | Method for machining long-thin tube parts |
| US9600923B2 (en) | 2011-05-26 | 2017-03-21 | Thomson Licensing | Scale-independent maps |
| CN110814121A (en) * | 2019-11-19 | 2020-02-21 | 南昌航空大学 | Small-bending-radius push bending method of small-diameter pipe and small-diameter pipe |
| US10791314B2 (en) | 2010-03-31 | 2020-09-29 | Interdigital Ce Patent Holdings, Sas | 3D disparity maps |
-
1995
- 1995-03-25 CN CN 95110988 patent/CN1132123A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384559C (en) * | 2003-05-23 | 2008-04-30 | 雅马哈发动机株式会社 | Multiple pipe, method of manufacturing the multiple pipe and device for manufacturing multiple pipe |
| CN101804429A (en) * | 2010-03-26 | 2010-08-18 | 东莞市旗丰消声器有限公司 | Bending process of double-layer pipe |
| US10791314B2 (en) | 2010-03-31 | 2020-09-29 | Interdigital Ce Patent Holdings, Sas | 3D disparity maps |
| US9600923B2 (en) | 2011-05-26 | 2017-03-21 | Thomson Licensing | Scale-independent maps |
| CN105081675A (en) * | 2014-05-20 | 2015-11-25 | 哈尔滨飞机工业集团有限责任公司 | Method for machining long-thin tube parts |
| CN104439919A (en) * | 2014-10-23 | 2015-03-25 | 山东大学 | Method for machining thin-wall flexible element with assistance of low-melting-point alloy |
| CN104439919B (en) * | 2014-10-23 | 2017-07-07 | 山东大学 | Using the method for low-melting alloy secondary process thin-walled flexible member |
| CN110814121A (en) * | 2019-11-19 | 2020-02-21 | 南昌航空大学 | Small-bending-radius push bending method of small-diameter pipe and small-diameter pipe |
| CN110814121B (en) * | 2019-11-19 | 2022-03-01 | 南昌航空大学 | Small-bending-radius push bending method of small-diameter pipe and small-diameter pipe |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |