GB1266951A - - Google Patents

Info

Publication number
GB1266951A
GB1266951A GB1266951DA GB1266951A GB 1266951 A GB1266951 A GB 1266951A GB 1266951D A GB1266951D A GB 1266951DA GB 1266951 A GB1266951 A GB 1266951A
Authority
GB
United Kingdom
Prior art keywords
die
tube
over
crosshead
cylinder
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
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
Priority to US76487568A priority Critical
Application filed filed Critical
Publication of GB1266951A publication Critical patent/GB1266951A/en
Expired legal-status Critical Current

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
    • B21C5/00—Pointing; Push-pointing
    • B21C5/003—Pointing; Push-pointing of hollow material, e.g. tube
    • 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
    • B21C5/00—Pointing; Push-pointing

Abstract

1,266,951. Pointing. GEORGE A. MITCHELL CO. 28 Feb., 1969 [3 Oct., 1968], No. 5295/69. Heading B3P. A tube or bar is pointed to allow subsequent drawing by forcing a succession of dies over its end. In one embodiment, Figs. 1 and 3A, a tube 64 containing a mandrel 112 is clamped between a stationary clamp 66 and a clamp 68 which is movable by an hydraulic cylinder 78 via linkage 88-100. The mandrel is retained in position by dimples formed in the tube 64 by the clamping operation. A die 118 carried by a cylinder 26 is forced to the left by hydraulic cylinders 46, 48 over the end of the tube 64, after which the tube end is further reduced indiameter by first moving a cylinder 28 carrying a die 120 and then a cylinder 30 carrying a die 122. In another embodiment, Fig. 6B, a first die 160 carried by a crosshead 154 is forced by an hydraulic cylinder over the end of a clamped tube 1. As the first die 160 is being forced over the tube, further crossheads 156, 158 each carrying a pointing die are urged into engagement with the tube end by a member 188, constantly biased to the left by an air cylinder, in order to prevent bowing of the pointed end. When the die 164 in the last crosshead 158 is moved over the tube end, the extreme end of the tube is directly engaged by the member 188. In a further embodiment (Figs. 7 and 8, not shown), dies (244) are mounted by spring-loaded balls (242) in slots (238) of a rotary die holder (234) mounted on a crosshead (218). In operation, the uppermost die in the die holder (234) is forced over the tube end by moving the crosshead (218), after which the die is retracted, the die holder (234) rotated to bring the next die into position and the crosshead (218) again moved.
GB1266951D 1968-10-03 1969-02-28 Expired GB1266951A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US76487568A true 1968-10-03 1968-10-03

Publications (1)

Publication Number Publication Date
GB1266951A true GB1266951A (en) 1972-03-15

Family

ID=25072040

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1266951D Expired GB1266951A (en) 1968-10-03 1969-02-28

Country Status (5)

Country Link
US (1) US3572080A (en)
BE (1) BE739728A (en)
DE (1) DE1949272A1 (en)
FR (1) FR2019866A1 (en)
GB (1) GB1266951A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021603A1 (en) * 1979-06-08 1981-01-07 STEVENS & BULLIVANT LIMITED Tube end forming apparatus

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845653A (en) * 1971-03-22 1974-11-05 Continental Can Co Double stage necking
DE2401345A1 (en) * 1974-01-09 1975-07-10 Mannesmann Roehren Werke Ag Pull-stretching method for producing long pipes and apparatus for carrying out the method
DE19634307C2 (en) * 1996-08-24 1998-09-24 Bueltmann Monika Hydraulic system for forming a tubular tile
DE19735486C2 (en) * 1997-08-16 2000-07-20 Felss Geb Device and method for cold forming workpieces
CA2342702A1 (en) * 2001-04-04 2002-10-04 Copperweld Canada Inc. Forming method using tube blanks of variable wall thickness
US6735998B2 (en) 2002-10-04 2004-05-18 George A. Mitchell Company Method of making metal ball bats
US6779375B1 (en) 2003-03-26 2004-08-24 Randall L. Alexoff Method and apparatus for producing tubes and hollow shafts
US6807837B1 (en) 2003-03-26 2004-10-26 Randall L. Alexoff Method and apparatus for producing variable wall thickness tubes and hollow shafts
US7114362B2 (en) * 2004-03-27 2006-10-03 George A. Mitchell Company Method of making metal workpiece
US8091400B2 (en) * 2006-08-07 2012-01-10 Felss Gmbh Device and method for forming a workpiece
CN102878355A (en) * 2012-10-24 2013-01-16 珠海格力电器股份有限公司 Reducing pipeline part of air conditioning system
CN106607516A (en) * 2015-10-26 2017-05-03 镇江中焱数控设备有限公司 Pipe end forming machine
US10639690B2 (en) * 2016-07-22 2020-05-05 Sms Group Gmbh Preparing a tube end for rod drawing

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR774985A (en) * 1933-08-18 1934-12-17 Maschb Ag Vormals Ehrhardt & S Method for stuffer stretching for the manufacture of tubes or hollow body
US2110965A (en) * 1934-07-02 1938-03-15 Tubus A G Reducing the diameter of hollow metal articles
DE730633C (en) * 1938-10-19 1943-01-15 Heinkel Flugzeugwerke Gmbh E hydraulic Rohreinziehpresse
FR942599A (en) * 1946-01-11 1949-02-11 Wellman Seaver Rolling Mill Co Processing the metal tube manufacturing method
GB843186A (en) * 1956-01-12 1960-08-04 Appel Process Ltd Improvements in or relating to the forging or swaging of elongated workpieces
US3035340A (en) * 1958-04-25 1962-05-22 Appel Process Ltd Methods for relieving stresses in and straightening tubular workpieces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021603A1 (en) * 1979-06-08 1981-01-07 STEVENS & BULLIVANT LIMITED Tube end forming apparatus

Also Published As

Publication number Publication date
FR2019866A1 (en) 1970-07-10
DE1949272A1 (en) 1970-06-04
BE739728A (en) 1970-03-16
US3572080A (en) 1971-03-23

Similar Documents

Publication Publication Date Title
US3406441A (en) Method and arrangement for mounting elastically flexible sealing rings in internal grooves
GB1020070A (en) Means for chucking workpieces, such as rods or tubes, more particularly in the feed carriages of stripping or scraping machines
GB1337334A (en) Method and machine for assembling slide fasteners of separable end type
GB1234286A (en)
GB1224052A (en) Tool arrangement for the production of impact extruded articles
GB1517860A (en) Loading arm
GB1058370A (en)
GB1264707A (en)
GB1174027A (en) Extrusion Apparatus
ES410239A1 (en) Combination slider assembling and end stop applying apparatus
GB1365615A (en) Assembly comprising a vertically reciprocable ram and a punch holder
FR2397936A1 (en) Method and apparatus for changing a die ring in an indirect extrusion press
GB1212152A (en) Improvements in and relating to bar feed devices for lathes
GB1185537A (en) Improvements relating to Extrusion of Metals
US2478102A (en) Fluid pressure apparatus for successively clamping and deforming tube ends
GB1458125A (en) Pneumatic tool
GB1395763A (en) Crimping apparatus and process
GB1312703A (en) Extrusion press
GB1356676A (en) Machien tool or press
NL177337C (en) Working cylinder with limit switches for more, in particular gaseous work media.
GB1371280A (en) Apparatus for securing a fitting over the end of a tube or hose
GB1011960A (en) Scrapless heading
GB1240176A (en) Improvements in or relating to presses
FR2306814A1 (en) Parting off tool for synthetic thermoplastic pipes - profiled cutter in holder with guide rollers cannot crush pipes
GB1297716A (en)

Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years