EP3698072A1 - Metal bellows and method for producing a metal bellows - Google Patents
Metal bellows and method for producing a metal bellowsInfo
- Publication number
- EP3698072A1 EP3698072A1 EP18792386.7A EP18792386A EP3698072A1 EP 3698072 A1 EP3698072 A1 EP 3698072A1 EP 18792386 A EP18792386 A EP 18792386A EP 3698072 A1 EP3698072 A1 EP 3698072A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal bellows
- folds
- bellows
- metal
- wandungsflanken
- Prior art date
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J3/00—Diaphragms; Bellows; Bellows pistons
- F16J3/04—Bellows
- F16J3/047—Metallic bellows
-
- 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
- B21D15/00—Corrugating tubes
- B21D15/04—Corrugating tubes transversely, e.g. helically
- B21D15/10—Corrugating tubes transversely, e.g. helically by applying fluid pressure
Definitions
- the invention relates to a metal bellows, having a bellows wall extending around a longitudinal axis and enclosing a bellows interior, wherein the bellows wall
- the invention relates to a method for producing a
- Metal bellows and methods for producing metal bellows are known in the art, wherein a construction of Metallbälgen is that a metal tube through Applied internal pressure and is deformed into a metal bellows (bellows), as described for example in DE 20 2011 102 549 Ul. This allows metal bellows
- a metal bellows is formed by a plurality of corrugated discs, wherein adjacent discs are alternately welded together on the inside and on the outside (membrane bellows), as described for example in DE 20 2013 007 501 Ul. This can be better
- Deformation properties of the bellows for example. Higher possible elongations can be achieved.
- Deformation for example, its elongation, and its
- the invention is based on the object
- the invention solves the problem by a metal bellows with the features of claim 1. Thereafter, the distinguished
- Metal bellows characterized in that the inner folds and / or the outer folds are shaped such that they include in each case in the radial end regions (fold end region) in each case an annular space. In this way, a metal bellows is created, the
- Inner pleats may also be referred to as “inner pleats” and the outer pleats may also be referred to as “outer pleats”.
- the fold which encloses the annulus, can in the
- the annular space can not exclusively, for example. Sectionally, have a circular, elliptical or oval cross-section. In this case, symmetrical or asymmetrical embodiments are possible.
- the present metal bellows are, in particular, a material produced by hydroforming and subsequently deformed, in particular compressed,
- adjacent sidewalls can have a line contact (e.g., circle) or a flat one in the contact area
- Forming contact e.g., annulus
- Inner fold radially inward and the outer fold radially outwardly arranged (radial direction orthogonal to the longitudinal axis oriented).
- the inner fold forms a "valley"
- the Wandungsflanken may be formed in cross-section S-shaped or serpentine (meandering or reciprocating). Conveniently, the Wandungsflanken
- the wall flanks and the outer folds and / or the inner folds can be formed in one piece.
- Metal bellows may be present.
- the bellows wall can have a smaller wall thickness at the outer folds than at the inner folds.
- the bellows wall in particular due to the hydroforming at the outer folds elastic than at the inner folds, wherein the design of the outer folds with annular spaces protects the outer folds from overloading.
- the annular space in the radial direction a height (height of the annular space
- the object mentioned at the outset is also achieved by a method for producing a metal bellows, in particular a metal bellows as described above. Thereafter, the metal bellows is characterized by the following steps:
- the Wandungsflanken be deformed such that this
- the corrugated structure increases the rigidity of the wall flanks.
- the upsetting of the metal bellows can take place in that the shaped elements of the mold are moved along the longitudinal axis of the metal bellows, in particular until the wall flanks and / or the
- Form elements lie together on block.
- the "on block” reliably the end of the deformation signaled.
- the mold elements of the mold along the longitudinal axis of the metal bellows are moved towards each other until the wall flanks and / or the form elements are together on block and further compression of the metal bellows is not possible.
- a mold is located between two wall flanks, which are connected to each other via an inner fold or an outer fold.
- Mold needed and handling of the metal bellows for repositioning in another tool is not required. Throughput times, equipment aids for rearrangement and footprint in a production can be saved.
- Figure 1 shows a metal bellows, the total with the
- the metal bellows 10 has a bellows wall 16 extending around a longitudinal axis 12 and enclosing a bellows interior 14.
- the bellows wall 16 has inner folds 18 and outer folds 20, which are connected to each other via Wandungsflanken 22.
- the inner pleats 18 and the outer pleats 20 are shaped so that of the inner pleats 18 and of the
- Outer folds 20 each have an annular space 24, 25 is included.
- the inner fold 18 and outer fold 20 each form an eyelet, loop or loop.
- Inner fold 18 forms a valley 30.
- An outer fold 20 forms a mountain 32.
- Outer fold 20 adjacent wall flanks 22 form a corrugation 34.
- the outer folds 20 surround the annulus 24 respectively immediately and completely.
- the inner folds 18 enclose the annular space 25 directly and completely.
- the wall flanks 22 are corrugated in the same direction. This means that the wall flanks 22 are corrugated in such a way that adjacent wall flanks 22 for the most part abut one another upon compression of the metal bellows 10.
- Outer folds 20 continuously merge into each other, so they are integrally formed.
- the wall flanks 22, the inner folds 18 and / or the outer folds 20 are thus free of radial welds.
- the bellows wall 16 has a smaller wall thickness at the outer folds 20 than at the inner folds 18.
- the annular space 24, 25 has in the radial direction in each case a height 36, which is less than 20 percent of the height between an outer fold 20 and the inner fold 18 in the present embodiment.
- the method for producing a metal bellows 10 works as follows: First, a particular with a longitudinal seam
- welded metal tube which is a semi-finished for a still to be manufactured metal bellows 10, in a mold (not shown) inserted (manual or mechanical insertion).
- Forming elements of the molding tool (not shown), inner folds 18, outer folds 20 and wall flanks 22 of the metal bellows 10 are formed.
- Inner pleats 18, the outer pleats 20 and / or the annular space 24, 25 may be those already described above
- the Wandungsflanken 22 are deformed such that they are corrugated in the same direction or in opposite directions (not shown). After deformation, the wall flanks 22 have a serpentine shape in cross-section.
- the upsetting of the metal bellows 10 takes place in that the shaping elements of the molding tool (not shown) are moved along the longitudinal axis 12 of the metal bellows 10 and moved toward one another until the wall flanks 22 and / or the shaped elements lie together on a block.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Diaphragms And Bellows (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017124162.0A DE102017124162A1 (en) | 2017-10-17 | 2017-10-17 | Metal bellows and method for producing a metal bellows |
PCT/EP2018/078422 WO2019076987A1 (en) | 2017-10-17 | 2018-10-17 | Metal bellows and method for producing a metal bellows |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3698072A1 true EP3698072A1 (en) | 2020-08-26 |
Family
ID=63963023
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18792386.7A Withdrawn EP3698072A1 (en) | 2017-10-17 | 2018-10-17 | Metal bellows and method for producing a metal bellows |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3698072A1 (en) |
DE (1) | DE102017124162A1 (en) |
WO (1) | WO2019076987A1 (en) |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1190716A (en) * | 1915-09-11 | 1916-07-11 | Louis T Bowmann | Flexible metallic diaphragm. |
FR1258822A (en) * | 1958-02-10 | 1961-04-21 | Standard Thomson Corp | Machine for the manufacture of flexible metal tubes |
DK90887C (en) * | 1958-12-11 | 1961-05-15 | Danfoss Ved Ingenioer Mads Cla | Method of making bellows elements of a tubular blank and bellows element made of the method. |
US3233632A (en) * | 1962-09-07 | 1966-02-08 | Continental Illinois Nat Bank | Bellows radius weld |
JPS5117393Y2 (en) * | 1971-04-23 | 1976-05-11 | ||
JPS5620863A (en) * | 1980-05-21 | 1981-02-26 | Tokyo Rasenkan Seisakusho:Kk | Diaphragm type bellows tube |
JPH03244874A (en) * | 1990-02-22 | 1991-10-31 | Fuji Seiko Kk | Close contact high pressure-proof type metallic bellows and manufacture thereof |
JP4862987B2 (en) * | 2006-01-19 | 2012-01-25 | Nok株式会社 | Metal bellows type accumulator |
JP5535743B2 (en) * | 2009-05-01 | 2014-07-02 | イーグル工業株式会社 | Metal bellows |
JP5715845B2 (en) * | 2011-02-15 | 2015-05-13 | イーグル工業株式会社 | accumulator |
DE202011102549U1 (en) | 2011-06-29 | 2012-10-01 | Boa Balg- Und Kompensatoren-Technologie Gmbh | metal bellows |
DE202013007501U1 (en) | 2013-08-21 | 2014-09-25 | Boa Balg- Und Kompensatoren-Technologie Gmbh | decoupling element |
KR101700285B1 (en) * | 2016-02-25 | 2017-01-26 | 주식회사 유니온기업 | Bellows with corrugation part of pincette form and manufacturing method thereof |
-
2017
- 2017-10-17 DE DE102017124162.0A patent/DE102017124162A1/en active Pending
-
2018
- 2018-10-17 WO PCT/EP2018/078422 patent/WO2019076987A1/en unknown
- 2018-10-17 EP EP18792386.7A patent/EP3698072A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE102017124162A1 (en) | 2019-04-18 |
WO2019076987A1 (en) | 2019-04-25 |
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Legal Events
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