EP0401819A3 - Method of bending tubes - Google Patents
Method of bending tubes Download PDFInfo
- Publication number
- EP0401819A3 EP0401819A3 EP19900110801 EP90110801A EP0401819A3 EP 0401819 A3 EP0401819 A3 EP 0401819A3 EP 19900110801 EP19900110801 EP 19900110801 EP 90110801 A EP90110801 A EP 90110801A EP 0401819 A3 EP0401819 A3 EP 0401819A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- bending
- angle
- tube
- task
- parameter
- 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- Withdrawn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
-
- 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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/14—Bending rods, profiles, or tubes combined with measuring of bends or lengths
Abstract
Die Erfindung bezieht sich auf ein Verfahren zum Biegen von Rohren aus bestimmtem Werkstoff und mit bestimmter Quer schnittsgestalt um einen Sollwinkel αi und mit einem be stimmten Biegeradius (nachfolgend als Biegeaufgabe bezeich net), bei dem zunächst eine Überprüfung, ob für die Biege aufgabe bereits ein passender Biegewinkel γi und eine Kenn größe bekannt sind, welche ein Maß für die Rückfederung des Rohres bei der betreffenden Biegeaufgabe ist, erfolgt. Ist der passende Biegewinkel und die Kenngröße unbekannt, so wird das Rohr um einen Winkel α ′ / i gebogen; die Kenngröße, welche ein Maß für die Rückfederung des Rohres bei der be treffenden Biegeaufgabe ist, und ein evtl. Biegewinkel γi, der so gewählt ist, daß nach Biegen des Rohres um γi = αi + εi unter Berücksichtigung der Rückfederung eine Bie gung um den Sollwinkel αi verbleibt, bestimmt und gespei chert. Das Rohr wird auf den Biegewinkel γi weitergebogen. Ist bereits die gleiche Biegeaufgabe gelöst worden, so wird das Rohr bei weiteren gleichen Biegeaufgaben um den Biegewinkel γi gebogen. Beim Lösen dieser weiteren gleichen Biegeaufgaben wird die Kenngröße ermittelt und mit der be reits bekannten Kenngröße verglichen und evtl. ein neuer passender Biegewinkel bestimmt. The invention relates to a method for bending pipes made of a certain material and with a certain cross-sectional shape by a target angle α i and with a certain bending radius (hereinafter referred to as bending task net), in which first a check as to whether the bending task already exists A suitable bending angle γ i and a characteristic size are known, which is a measure of the springback of the tube in the bending task in question. If the suitable bending angle and the parameter are unknown, the pipe is bent by an angle α ′ / i; the parameter, which is a measure of the springback of the tube for the bending task in question, and a possible bending angle γ i , which is selected such that after bending the tube by γ i = α i + ε i , taking into account the springback Bending around the target angle α i remains, determined and stored. The tube is bent further to the bending angle γ i . If the same bending task has already been solved, the tube is bent by the bending angle γ i for further same bending tasks. When solving these other same bending tasks, the parameter is determined and compared with the parameter that is already known, and a new suitable bending angle is possibly determined.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3918714 | 1989-06-08 | ||
| DE3918714 | 1989-06-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0401819A2 EP0401819A2 (en) | 1990-12-12 |
| EP0401819A3 true EP0401819A3 (en) | 1991-06-26 |
Family
ID=6382350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19900110801 Withdrawn EP0401819A3 (en) | 1989-06-08 | 1990-06-07 | Method of bending tubes |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP0401819A3 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR9103814A (en) * | 1991-08-30 | 1993-03-30 | Brasil Compressores Sa | PLASTICALLY DEFORMABLE BODY BENDING PROCESS |
| CA2221324A1 (en) * | 1997-11-17 | 1999-05-17 | Eagle Precision Technologies Inc. | Tub bending apparatus and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1810533A1 (en) * | 1968-11-23 | 1970-06-25 | Peddinghaus Dr Carl Ullrich | Bending machine for bars, wires and profiles |
| DE1552111A1 (en) * | 1966-01-21 | 1970-09-17 | Schwermaschb Kom Ernst Thaelma | Process for the control and measurement of bar profiles when bending on profile bending machines |
| US3821525A (en) * | 1972-03-16 | 1974-06-28 | Conrac Corp | Method and apparatus for automatically compensated tube bending |
| US4131003A (en) * | 1977-06-07 | 1978-12-26 | The Boeing Company | Semiautomatic control system for tube bending machine |
-
1990
- 1990-06-07 EP EP19900110801 patent/EP0401819A3/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1552111A1 (en) * | 1966-01-21 | 1970-09-17 | Schwermaschb Kom Ernst Thaelma | Process for the control and measurement of bar profiles when bending on profile bending machines |
| DE1810533A1 (en) * | 1968-11-23 | 1970-06-25 | Peddinghaus Dr Carl Ullrich | Bending machine for bars, wires and profiles |
| US3821525A (en) * | 1972-03-16 | 1974-06-28 | Conrac Corp | Method and apparatus for automatically compensated tube bending |
| US4131003A (en) * | 1977-06-07 | 1978-12-26 | The Boeing Company | Semiautomatic control system for tube bending machine |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0401819A2 (en) | 1990-12-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): FR GB IT |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
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| AK | Designated contracting states |
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|
| 17P | Request for examination filed |
Effective date: 19911231 |
|
| 17Q | First examination report despatched |
Effective date: 19920715 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19921126 |