GB962937A - Improvements relating to tubular return bends - Google Patents
Improvements relating to tubular return bendsInfo
- Publication number
- GB962937A GB962937A GB3564062A GB3564062A GB962937A GB 962937 A GB962937 A GB 962937A GB 3564062 A GB3564062 A GB 3564062A GB 3564062 A GB3564062 A GB 3564062A GB 962937 A GB962937 A GB 962937A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- diameter
- legs
- blocks
- bend
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
- B21C37/283—Making U-pieces
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Forging (AREA)
Abstract
962,937. Making return bends; forging. BABCOCK & WILCOX Ltd. Sept. 19, 1962 [Sept. 22, 1961], No. 35640/62. Headings B3A and B3H. A method of making a return bend comprises forming a suitable length of tube having a diameter substantially greater than the required diameter or diameters of the leg portions of the return bend, reducing the diameter of the end parts of the tube and bending the length into the form of a return bend. A length of tube having a diameter 50% or more greater than the tubes to be connected to it is reduced asymmetrically at its ends and bent through 180 degrees by any known method. The bent tube is compressed between a pair of blocks 10 down to the diameter of the leg portion 18 and a pair of dies 12 slidable between the blocks engage the curved portion of the tube to reduce the radius of curvature, the distance between the legs and produce a rearwardly extending bulbous portion 16 which may be opened to a desired diameter to form a stub. A mandrel may be inserted through the wall of the bent pipe to facilitate the forming of the bulb and mandrels inserted in the legs during pressing. The faces of the blocks 10 may be inclined. The tube ends may be reduced asymmetrically or symmetrically after bending. Ribs 20, 20<SP>1</SP> may be formed externally along the legs of the finished bend by the displacement of the excess material during the reducing operation using grooved blocks and dies. The ribs of adjacent tubes may be welded together to form a continuous tube wall. The leg diameters may be different and the bulbous portion off-set so as to form a continuation of one of the legs. A tube having a thinner wall portion on one side than the other in which the thinner side is positioned on the inside of the bend may be used. During the forming operations the tube may be generally or locally heated.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR873925A FR1308049A (en) | 1961-09-22 | 1961-09-22 | Tubing elbow manufacturing process |
Publications (1)
Publication Number | Publication Date |
---|---|
GB962937A true GB962937A (en) | 1964-07-08 |
Family
ID=8763322
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3564062A Expired GB962937A (en) | 1961-09-22 | 1962-09-19 | Improvements relating to tubular return bends |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR1308049A (en) |
GB (1) | GB962937A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5094096A (en) * | 1989-06-14 | 1992-03-10 | Chromcraft Furniture Corp. | Method of bending |
CN109940104A (en) * | 2019-02-28 | 2019-06-28 | 浙江长兴和良智能装备有限公司 | A kind of forming method of tee tube, molding machine and formation system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58125332A (en) * | 1982-01-22 | 1983-07-26 | Kubota Ltd | Manufacture of flat cylindrical body |
-
1961
- 1961-09-22 FR FR873925A patent/FR1308049A/en not_active Expired
-
1962
- 1962-09-19 GB GB3564062A patent/GB962937A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5094096A (en) * | 1989-06-14 | 1992-03-10 | Chromcraft Furniture Corp. | Method of bending |
CN109940104A (en) * | 2019-02-28 | 2019-06-28 | 浙江长兴和良智能装备有限公司 | A kind of forming method of tee tube, molding machine and formation system |
CN109940104B (en) * | 2019-02-28 | 2024-03-26 | 浙江长兴和良智能装备有限公司 | Forming method, forming device and forming system of three-way pipe |
Also Published As
Publication number | Publication date |
---|---|
FR1308049A (en) | 1962-11-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB978813A (en) | Conduit fittings and methods of forming them | |
US1903436A (en) | Method of and means for the manufacture of pipe fittings | |
US4841760A (en) | Process and apparatus for manufacturing tube bends | |
US2976606A (en) | Formation of bifurcated tubing | |
US2335342A (en) | Apparatus for tube bending | |
GB962937A (en) | Improvements relating to tubular return bends | |
US2882953A (en) | Tube bender having a support sleeve with a circular aperture merging into an oval aperture | |
GB951041A (en) | Tube-bending machine | |
US1683572A (en) | Pipe-bending mandrel | |
GB297650A (en) | Improvements in methods and means for the bending of metal tubing | |
US3335485A (en) | Method for making elbows | |
US1430856A (en) | Method of making return l's | |
US2839818A (en) | Widening bore of tubular bend | |
GB195278A (en) | Improved method for bending or curving copper and like pipes | |
JPS5732831A (en) | Method for manufacturing bent pipe joint continuously formed relatively long straight pipe part in one body at both ends | |
GB613118A (en) | Improvements in method and apparatus for bending metal tubes | |
GB1291157A (en) | A method and apparatus for producing flexible tubular bodies | |
SU565747A1 (en) | Tube-bending core | |
GB1105398A (en) | Shaping hoses of elastomeric material | |
US3010507A (en) | Apparatus for bending tubing | |
SU583846A1 (en) | Tube end shaping method | |
US1863033A (en) | Manufacture of return bends and similar structures | |
SU50787A1 (en) | Stamp for folding the ends of the bar iron into the tube | |
US2077641A (en) | Process for connecting pipes | |
GB801158A (en) | Improvements in the manufacture of tubular metal elements |