GB613118A - Improvements in method and apparatus for bending metal tubes - Google Patents

Improvements in method and apparatus for bending metal tubes

Info

Publication number
GB613118A
GB613118A GB3064845A GB3064845A GB613118A GB 613118 A GB613118 A GB 613118A GB 3064845 A GB3064845 A GB 3064845A GB 3064845 A GB3064845 A GB 3064845A GB 613118 A GB613118 A GB 613118A
Authority
GB
United Kingdom
Prior art keywords
tube
ram
mandrel
wrinkles
dies
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
Application number
GB3064845A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB3064845A priority Critical patent/GB613118A/en
Publication of GB613118A publication Critical patent/GB613118A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06Manufacture 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
    • B21C37/15Making tubes of special shape; Making tube fittings
    • B21C37/28Making tube fittings for connecting pipes, e.g. U-pieces
    • B21C37/29Making branched pieces, e.g. T-pieces
    • B21C37/294Forming collars by compressing a fluid or a yieldable or resilient mass in the tube

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

613,118. Bending tubes. WURZBURGER, P. D. Nov. 15, 1945, No. 30648. [Classes 83 (ii) and 83 (iv)] Mandrels ; restoring shape of articles.-A method of making elbows by bending a length of tubular stock comprises two successive operations, firstly forcing the tube longitudinally into a channel conforming to the external shape of the elbow and secondly removing the wrinkles or distortions thereby produced in the leading end of the tube by means of internal radial pressure. The method is particularly applicable to work having a bend radius smaller than the diameter of the tube. The blank tube is inserted into a pair of split dies D, Fig. 6, and acted on by a ram R having a pilot P engaging the inside diameter and a shoulder S abutting the end of the tube. The tube is' bent to right angle form, but one arm is deformed with wrinkles 13, 14 and the lower mouth 11 is raised from the side of the die. The ram is held in the down position and a mandrel M, operated as by a hydraulic cylinder H is introduced into the mouth 12 of the tube. The mandrel has a rounded nose 20 conforming to the inside contour of the outer bend radius of the tube and runs in a sleeve 21 having the same wall thickness as the tube. In Fig. 7, the mandrel has operated to remove and iron out the wrinkles in the tube and set the outer wall 16 of the bend. The finished elbow has an oblique edge 12<SP>1</SP> which may be further worked and trued. For larger pipes the leading edge 11 of a blank tube may be cut at an angle to be longer than the edge 10 and so make allowance for the shortening in bending. In a modification, a specially shaped mandrel N, Fig. 10, is used with the same dies as before, said mandrel having a tapering portion 30 acting to guide the upper leading edge of the tube being bent, and a bulb end 31 whose lower curvature is of the same form as the inside radius of the outer wall of the tube. The mandrel is inserted in the dies and its shank 32 runs in a sleeve 33 of the same dimensions as the tube so that a space substantially 'the thickness of the tube is left between the mandrel and lower wall of the dies. The ram is then operated to bend the tube to elbow form around the mandrel which is withdrawn to remove the wrinkles formed. If desired, the mandrel may commence its withdrawal before the ram R has completed its stroke. In yet another modification, an elbow is formed from a blank tube, having a sealed end, which is partially filled with a material F, Fig. 20, which may be oil, water, or a dry granular material such as salt or sand, polyethylene glycol or " carbowax " or other granulated filler. The tube is inserted in the die D and acted on by a ram Q having an outer sleeve member 40 to abut the tube end and an inner punch member 41. The outer part of the ram operates to force the tube around the bend in the dies where the closed end comes into contact with the end 44 of a second ram V occupying the whole diameter of the channel in the die. The inner member 41 of the ram is then operated to compress the liquid or other material inside the tube, to remove the wrinkles formed in bending and impart a substantially squared end 46 to the tube by reason of its bearing against the ram V. This end may later be removed. Where liquid or substantially liquid fillers are used they may be fed into the tube through the ram after or during the bending operation to remove wrinkles or the like, the pressure of such fluids being controlled externally of the ram. Specification 552,857 is referred to.
GB3064845A 1945-11-15 1945-11-15 Improvements in method and apparatus for bending metal tubes Expired GB613118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3064845A GB613118A (en) 1945-11-15 1945-11-15 Improvements in method and apparatus for bending metal tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3064845A GB613118A (en) 1945-11-15 1945-11-15 Improvements in method and apparatus for bending metal tubes

Publications (1)

Publication Number Publication Date
GB613118A true GB613118A (en) 1948-11-23

Family

ID=10310926

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3064845A Expired GB613118A (en) 1945-11-15 1945-11-15 Improvements in method and apparatus for bending metal tubes

Country Status (1)

Country Link
GB (1) GB613118A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE960947C (en) * 1953-12-22 1957-03-28 Wagner & Co Werkzeugmaschinenf Device for producing pipe bends by pushing them into a bending die
DE1036605B (en) * 1954-02-04 1958-08-14 Nibco Device for the production of manifolds with a small radius
GB2162446A (en) * 1984-07-26 1986-02-05 Ti Gas Spares Ltd Manufacturing components for gas fired appliances
WO2005108931A2 (en) * 2004-05-10 2005-11-17 Endress+Hauser Flowtec Ag Production of a bent measuring tube for a vibration-type measuring sensor
CN110756633A (en) * 2018-07-25 2020-02-07 丛华 Combined mold core structure for cold-push forming of straight pipe elbow

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE960947C (en) * 1953-12-22 1957-03-28 Wagner & Co Werkzeugmaschinenf Device for producing pipe bends by pushing them into a bending die
DE1036605B (en) * 1954-02-04 1958-08-14 Nibco Device for the production of manifolds with a small radius
GB2162446A (en) * 1984-07-26 1986-02-05 Ti Gas Spares Ltd Manufacturing components for gas fired appliances
WO2005108931A2 (en) * 2004-05-10 2005-11-17 Endress+Hauser Flowtec Ag Production of a bent measuring tube for a vibration-type measuring sensor
WO2005108931A3 (en) * 2004-05-10 2006-04-13 Flowtec Ag Production of a bent measuring tube for a vibration-type measuring sensor
CN110756633A (en) * 2018-07-25 2020-02-07 丛华 Combined mold core structure for cold-push forming of straight pipe elbow

Similar Documents

Publication Publication Date Title
US2203868A (en) Apparatus for making wrought metal t&#39;s
US3595047A (en) Method of forming o-ring grooves
US3292414A (en) Apparatus for localized swaging of pipes
US1647447A (en) Method of fastening tubular bodies in holes of other bodies
US2581787A (en) Manufacturing highly resilient corrugated tubes
US4457157A (en) Pipe end expanding or contracting device utilizing ironing
US2701002A (en) Apparatus for making pipe couplings or fixtures
US2599706A (en) Method for forging
US2138199A (en) Method of making metal fittings and the like
US3453857A (en) Apparatus and method of bending pipe
US2178141A (en) Method for straightening oil-well casings or the like
GB613118A (en) Improvements in method and apparatus for bending metal tubes
US2408325A (en) Working tubular articles
US3712097A (en) Device for the manufacture of a branch to a straight tube
US2078195A (en) Method of manufacturing wrought nonferrous pipe fittings
US2560822A (en) Means and method for making seamless pipe elbows
GB1525245A (en) Process for the production of a hose coupling and a hose coupling produced by the process
GB835259A (en) Bent tubular metal articles
US2715432A (en) Means for making elbows
US2952070A (en) Wrought fitting and method of making
US1525730A (en) Method of making spirally-grained seamless tubing
US2500890A (en) Metal working method and mechanism
US2918102A (en) Apparatus for bending tube blanks
US2831523A (en) Method and means for making elbows by forcing tubular stock through a die
US2393283A (en) Method of expanding tubes