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GB1275015A - Improvement in the extrusion of seamless tubing - Google Patents

Improvement in the extrusion of seamless tubing

Info

Publication number
GB1275015A
GB1275015A GB52758/70A GB5275870A GB1275015A GB 1275015 A GB1275015 A GB 1275015A GB 52758/70 A GB52758/70 A GB 52758/70A GB 5275870 A GB5275870 A GB 5275870A GB 1275015 A GB1275015 A GB 1275015A
Authority
GB
United Kingdom
Prior art keywords
mandrel
bore
diameter
extrusion
billet
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
GB52758/70A
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.)
Cefilac SA
Original Assignee
Cefilac SA
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 Cefilac SA filed Critical Cefilac SA
Publication of GB1275015A publication Critical patent/GB1275015A/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
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/085—Making tubes
    • 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
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/007—Hydrostatic extrusion

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Forging (AREA)

Abstract

1275015 Extruding CEFILAC 5 Nov 1970 [5 Nov 1969] 52758/70 Heading B3P A hot extrusion process for making metal tubes comprises inserting a pierced billet into an extrusion container and extruding the billet through a die using a mandrel whose diameter is smaller than the pierced bore so as to leave an annular gap between the bore and the mandrel. The provision of the gap ensures that vitreous lubricant in the bore is not wiped off as the mandrel is inserted. The bore diameter exceeds the mandrel diameter by 5-30% of the difference between the container inner diameter and the mandrel diameter. The extrusion is effected by an hydraulic press which achieves full pressure in 0À5-4 seconds using a bushel valve or two parallel valves or by using valves with automatic programmed opening. An example is given of extruding carbon steel. In operation, the billet first flows into contact with the container wall and then with the leading end of the mandrel to trap the lubricant.
GB52758/70A 1969-11-05 1970-11-05 Improvement in the extrusion of seamless tubing Expired GB1275015A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6937995A FR2067486A5 (en) 1969-11-05 1969-11-05

Publications (1)

Publication Number Publication Date
GB1275015A true GB1275015A (en) 1972-05-24

Family

ID=9042632

Family Applications (1)

Application Number Title Priority Date Filing Date
GB52758/70A Expired GB1275015A (en) 1969-11-05 1970-11-05 Improvement in the extrusion of seamless tubing

Country Status (10)

Country Link
US (1) US3724254A (en)
JP (1) JPS5017186B1 (en)
AT (1) AT307200B (en)
CA (1) CA923848A (en)
DE (1) DE2054157A1 (en)
ES (1) ES385088A1 (en)
FR (1) FR2067486A5 (en)
GB (1) GB1275015A (en)
LU (1) LU61979A1 (en)
ZA (1) ZA707046B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170297070A1 (en) * 2013-08-07 2017-10-19 Azz Wsi Llc Flat bar and method of making same

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012757A1 (en) * 1980-04-02 1981-10-15 Aluminium-Walzwerke Singen Gmbh, 7700 Singen EXTRUSION PRESS AND METHOD FOR PRODUCING PROFILES FROM METAL BOLTS
NL1008309C2 (en) * 1997-05-29 1998-12-01 Terlet Nv Scraped surface heat exchanger.
PL2696731T3 (en) * 2011-04-15 2017-05-31 Watson Investor Communications, Llc System and method for dispensing a measured amount of a loose material
CN110951947A (en) * 2019-11-12 2020-04-03 江阴康瑞成型技术科技有限公司 Stainless steel bar easy to punch and cut and production process thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2063562A (en) * 1934-04-12 1936-12-08 Sparks Processes Inc Manufacture of extruded metal shapes by hot hydraulic extrusion
FR1380420A (en) * 1962-05-22 1964-12-04 Cefilac Hot-spinning process for hollow profiles
US3205692A (en) * 1963-11-06 1965-09-14 Reynolds Metals Co Method of producing hollow extruded products
US3263468A (en) * 1965-04-21 1966-08-02 Anaconda American Brass Co Method and apparatus for extrusion of tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170297070A1 (en) * 2013-08-07 2017-10-19 Azz Wsi Llc Flat bar and method of making same

Also Published As

Publication number Publication date
ZA707046B (en) 1971-08-25
ES385088A1 (en) 1973-03-16
US3724254A (en) 1973-04-03
AT307200B (en) 1973-05-10
LU61979A1 (en) 1971-05-10
CA923848A (en) 1973-04-03
DE2054157A1 (en) 1971-05-13
FR2067486A5 (en) 1971-08-20
JPS5017186B1 (en) 1975-06-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees