EP1276573B1 - Biegevorrichtung für dünnwandige metallrohre - Google Patents
Biegevorrichtung für dünnwandige metallrohre Download PDFInfo
- Publication number
- EP1276573B1 EP1276573B1 EP01929341A EP01929341A EP1276573B1 EP 1276573 B1 EP1276573 B1 EP 1276573B1 EP 01929341 A EP01929341 A EP 01929341A EP 01929341 A EP01929341 A EP 01929341A EP 1276573 B1 EP1276573 B1 EP 1276573B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mandrel
- bending
- bending device
- clamping head
- mandrel tip
- 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.)
- Expired - Lifetime
Links
- 238000005452 bending Methods 0.000 title claims abstract description 60
- 239000002184 metal Substances 0.000 title claims abstract description 16
- 229920001971 elastomer Polymers 0.000 claims abstract description 13
- 239000000806 elastomer Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 claims description 4
- 206010040954 Skin wrinkling Diseases 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000013404 process transfer Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- 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
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
-
- 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
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/05—Bending tubes using mandrels or the like co-operating with forming members
- B21D9/07—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only
- B21D9/073—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only with one swinging forming member
Definitions
- the invention relates to a bending device for thin-walled metal pipes from a straight pipe guide, one adjoining and opposite the Pipe guide swiveling core template with terminal strip and a mandrel with one in the area of the core template flexible mandrel tip and one on the mandrel tip subsequent and firmly connected to it as well as in the Pipe guide axially fixed mandrel shaft (see e.g. US-A-4 481 803).
- Bending devices of this and similar kind for thin-walled tubes are known (magazine “Werkstatt and operation 104 (1971) 4, pages 271 to 274 ", "Prevention of wrinkles and buckling thin-walled tubes during bending "by Prof. Dr.-Ing. G. ⁇ hler, Bad Dürkheim).
- "Thin-walled” means in this connection pipes, the wall thickness of which referred to the diameter and the bending radius is small, e.g. B. Pipes with a wall thickness of approx. 0.8 mm at one Diameter of approx. 80 mm and a bending radius of approx. 120 mm.
- the invention has for its object a To create a bending device of the type mentioned at the outset, the one with a short clamping length of the pipe start gets along and the making a curvature with over the entire length allows circular cross-section.
- An optimal inside support with Slices can be set with a specifically adjustable Achieve flexibility when using elastomer washers different modulus of elasticity can be used.
- in the further area to the Dornspitze can be certain radial compressibility quite advantageous for be the result of the bend, because it usually means one better flexibility is connected.
- the clamping head can be made from a slotted, spherical outer ring and an inner support and Clamping cone exist, which is self-tightening during the bending process acts on the outer ring.
- the pulling force exerted on the tube during the bending process transfer the clamping ring and the clamping cone and in the sense a spread of the outer ring and thus a firmer Clamping effect exploited, while that of the traction device when Return the clamping head exerted force in the sense of solution acts.
- the clamping head can also be made from consist of several, in particular two spherical links, which form a rigid structural unit. because of the middle Constriction and rounding also occurs in this If there is no jamming in the elbow when Withdraw the clamping head. This solution stands out with a simple construction, especially by a optimal guidance and particularly good Post-profiling properties.
- the bending device according to Figure 1 consists of a fixed straight pipe guide 1, one itself subsequent, pivotable core template 2 with a Terminal strip 3 and a mandrel with one in the area of Core template 2 arranged mandrel tip 4 and one itself then firmly on the mandrel tip 4 attached, located in the area of the pipe guide 1 Mandrel shaft 5.
- the mandrel tip 4 and the mandrel shaft 5 are axially fixed during the bending process.
- the thorn tip 4 consists of a solid cylinder made of elastomer flexible but with regard to the deformability of the Pipe material is radially practically incompressible. In the In practice, hardships of the order of 95 Shore A are likely up to 50 Shore D for steel pipes. to The full cylinder can improve flexibility bendable section above its neutral fiber F must be slotted towards the outer arch, namely axially Slits S1 (Fig. 1) or radial slots S2 (Fig. 2) exhibit.
- Towards the core template 2 and thus towards the inner arch eccentrically offset runs through the mandrel tip 4 and the mandrel shaft 5 as a traction means 6 a rope.
- the traction device 6 is axially fixed in the mandrel shaft 5 and sits with little play in the mandrel tip 4, what for the radial Incompressibility of the mandrel tip 4 is cheap, it is because that a certain compressibility in favor of one increased flexibility especially towards the Dornspitze 4 located area possibly even with further axial Bores of different cross sections and of different depths and radially far enough away from the outside circumference is consciously accepted, which at inherently very incompressible elastomer could be practical.
- a thrust washer 8 in a groove on the Traction device 6 is axially fixed and axial evasion of the elastomer material of the full cylinder with the consequence a decrease in diameter.
- the traction device 6 extends further through a clamping head 7. Between the clamping head 7 and a stop 6a sits on the Traction means 6 a compression spring 9.
- the clamping head 7 is made from a slotted, spherical outer ring 7a and one inner support and clamping cone 7b. Between the outer ring 7a and the straight outlet of the core template 2 and the Terminal strip 3, the pipe R to be bent can be short Clamp length.
- the core template 2 turns counterclockwise pivoted, then the core template 2 and the clamp 3 held tube R carried over pulled the axially fixed mandrel 4 away. Because of the conical seat of the clamping head 7 ensure that acting self-tensioning on the outer ring 7a Tractive forces that the clamping force is increased.
- the Tube R reaches the bent area of the core template 2 and the initially straight mandrel tip 4 is becoming more and more bent, the tube R on its inner wall at Bending process in the active bending area is supported without gaps is so that no wrinkles or constrictions form can.
- Figure 2 differs of that of Figure 1 only in the clamping head and in the traction. As far as there are similarities, they are the same Reference symbols for the individual parts as in FIG. 1 used.
- the clamping head 17 consists of several, in particular two rigidly connected, spherical limbs attached to the a rope is connected as a traction means 16.
- the clamping head 17 could also consist of a one-piece, rigid, short body with a bellows-like Outer contour exist.
- the traction means 16 is movable passed through the mandrel tip 4 and the mandrel shaft 5. At the Swiveling it can be eased. For the Retrieve engages the return force on the outside guided traction means 16. First, the Retractable head 17 withdrawn through the tube until it on the End of the mandrel tip. Then the Clamping head 17 together with the mandrel tip 4 and the Spine shaft 5 withdrawn.
- the pipe bend can spherical links because of their good axial guidance axially offset places and their shape does not come. Their roundings and their central constriction give on the one hand enough space for the bent tube and on the other hand, have a profiling effect when retrieving the tube R. It is understood that with more than two spherical limbs, e.g. B three links the middle link spring back with its contour at least on the inner arch got to. The same applies to a bellows-like one Chuck.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10020725A DE10020725B4 (de) | 2000-04-27 | 2000-04-27 | Biegevorrichtung für dünnwandige Metallrohre |
DE10020725 | 2000-04-27 | ||
PCT/EP2001/001479 WO2001083130A1 (de) | 2000-04-27 | 2001-02-10 | Biegevorrichtung für dünnwandige metallrohre |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1276573A1 EP1276573A1 (de) | 2003-01-22 |
EP1276573B1 true EP1276573B1 (de) | 2004-01-14 |
Family
ID=7640151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01929341A Expired - Lifetime EP1276573B1 (de) | 2000-04-27 | 2001-02-10 | Biegevorrichtung für dünnwandige metallrohre |
Country Status (11)
Country | Link |
---|---|
US (1) | US6941787B2 (ja) |
EP (1) | EP1276573B1 (ja) |
JP (1) | JP3636444B2 (ja) |
AT (1) | ATE257751T1 (ja) |
AU (1) | AU2001256152A1 (ja) |
BR (1) | BR0110320A (ja) |
CA (1) | CA2405681C (ja) |
CZ (1) | CZ296545B6 (ja) |
DE (2) | DE10020725B4 (ja) |
ES (1) | ES2213694T3 (ja) |
WO (1) | WO2001083130A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4031827B2 (ja) * | 2002-10-10 | 2008-01-09 | 三桜工業株式会社 | 二重管の曲げ方法 |
KR200461968Y1 (ko) | 2010-01-14 | 2012-08-17 | 김상인 | 프레싱 타입 파이프 밴딩장치 |
CN102886406B (zh) * | 2012-10-09 | 2015-06-10 | 沈阳黎明航空发动机(集团)有限责任公司 | 一种导管成形用软芯棒 |
CN103341536B (zh) * | 2013-06-17 | 2015-04-01 | 中国航空工业集团公司北京航空制造工程研究所 | 一种管材绕弯内支撑装置及管材绕弯方法 |
CN108273889B (zh) * | 2018-01-22 | 2023-06-23 | 南昌航空大学 | 一种小弯曲半径管差温推弯成形的方法及装置 |
CN113020355B (zh) * | 2021-04-07 | 2023-06-16 | 苏州帝航防护设施有限公司 | 一种薄壁金属管折弯内衬装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1401394A (en) * | 1920-08-17 | 1921-12-27 | Plains Iron Works Company | Pipe-bending machine |
DE715297C (de) * | 1938-07-02 | 1941-12-18 | Hilgers Maschinen Und App Baua | Vorrichtung zum Einfuehren der Rohre, insbesondere solcher grosser Abmessungen, in Biegemaschinen mit Dornkopf und Dornstange |
US2996100A (en) * | 1957-04-08 | 1961-08-15 | Dravo Corp | Method and apparatus for bending pipe to short radh with minimum thinning of the outer wall thickness at the bend |
US3279237A (en) | 1963-05-20 | 1966-10-18 | Mueller Brass Co | Mandrel for bending tubing |
DE1552934C3 (de) * | 1966-07-27 | 1974-01-17 | Mueller Brass Co., Port Huron, Mich. (V.St.A.) | Dorn zum Biegen eines Rohres |
US3580044A (en) * | 1969-03-24 | 1971-05-25 | Edwin A De Voss | Tube bending mandrel |
US4493203A (en) | 1983-01-26 | 1985-01-15 | Crutcher Resources Corporation | Resilient internal mandrel |
US4481803A (en) | 1983-03-18 | 1984-11-13 | Teledyne Industries, Inc. | Method for eliminating distortion at the end of a tube bend |
-
2000
- 2000-04-27 DE DE10020725A patent/DE10020725B4/de not_active Expired - Fee Related
-
2001
- 2001-02-10 AT AT01929341T patent/ATE257751T1/de not_active IP Right Cessation
- 2001-02-10 ES ES01929341T patent/ES2213694T3/es not_active Expired - Lifetime
- 2001-02-10 CA CA002405681A patent/CA2405681C/en not_active Expired - Fee Related
- 2001-02-10 US US10/258,100 patent/US6941787B2/en not_active Expired - Fee Related
- 2001-02-10 JP JP2001580000A patent/JP3636444B2/ja not_active Expired - Fee Related
- 2001-02-10 CZ CZ20023541A patent/CZ296545B6/cs not_active IP Right Cessation
- 2001-02-10 WO PCT/EP2001/001479 patent/WO2001083130A1/de active IP Right Grant
- 2001-02-10 DE DE50101331T patent/DE50101331D1/de not_active Expired - Lifetime
- 2001-02-10 BR BR0110320-2A patent/BR0110320A/pt not_active Withdrawn
- 2001-02-10 AU AU2001256152A patent/AU2001256152A1/en not_active Abandoned
- 2001-02-10 EP EP01929341A patent/EP1276573B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA2405681C (en) | 2006-08-15 |
ATE257751T1 (de) | 2004-01-15 |
DE50101331D1 (de) | 2004-02-19 |
AU2001256152A1 (en) | 2001-11-12 |
BR0110320A (pt) | 2003-12-30 |
US6941787B2 (en) | 2005-09-13 |
US20030154756A1 (en) | 2003-08-21 |
DE10020725A1 (de) | 2001-11-08 |
CZ296545B6 (cs) | 2006-04-12 |
ES2213694T3 (es) | 2004-09-01 |
DE10020725B4 (de) | 2005-06-30 |
JP3636444B2 (ja) | 2005-04-06 |
CZ20023541A3 (cs) | 2003-11-12 |
CA2405681A1 (en) | 2001-11-08 |
WO2001083130A1 (de) | 2001-11-08 |
JP2003531725A (ja) | 2003-10-28 |
EP1276573A1 (de) | 2003-01-22 |
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