US3727444A - Press for hydrostatic extrusion of tubing - Google Patents

Press for hydrostatic extrusion of tubing Download PDF

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Publication number
US3727444A
US3727444A US00230726A US3727444DA US3727444A US 3727444 A US3727444 A US 3727444A US 00230726 A US00230726 A US 00230726A US 3727444D A US3727444D A US 3727444DA US 3727444 A US3727444 A US 3727444A
Authority
US
United States
Prior art keywords
billet
die
cylinder
mandrel
press
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 - Lifetime
Application number
US00230726A
Other languages
English (en)
Inventor
J Nilsson
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of US3727444A publication Critical patent/US3727444A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21C23/007—Hydrostatic extrusion

Definitions

  • the Prior Art The press is of the same type as that described in US. Pat. application Ser. No. 145,184 filed May 20, I971, Nilsson et al.
  • the press is operated by inserting a tubular billet in the cylinder between the die and the billet holder where it is fitted on to the mandrel.
  • the space between the high pressure piston and the billet holder is then filled with a pressure medium and the high pressure piston is then pushed by an operating device into the cylinder to generate the necessary pressure.
  • the pressure medium is pressed through the valve in the billet holder into the space behind this where it surrounds the billet and fills out the space around it.
  • the actual extrusion process can then commence by the pressure medium squeezing the billet in the cylinder.
  • the billet is drilled with an inwardly projecting collar at the front end, as can be seen from said application, so that the front end of the billet fits tightly around the front end of the mandrel and also against the die.
  • the object of the present invention is to avoid this complication and this is done by setting the valve in the billet holder to such a high pressure that the pressure on the billet holder before the valve opens is enough to upset the front end of the billet so that it seals both against the die and the mandrel before the pressure medium penetrates into the space around the billet. A straight hole can therefore be drilled in the billet, which easily slips over the mandrel without any special collar.
  • FIG. 1 shows the press comprising a high pressure cylinder 1 and a high pressure piston 2 which is activated by an operating device, not shown.
  • the die 3 At the other end of the cylinder is the die 3 which is supported by a flange 4.
  • the entire press is inserted in a press stand, not shown, which also contains the operating device, as is clear from the above-mentioned patent application.
  • a mandrel 5 which is fixed in a holder 6 with a drill hole 7 for the pressure medium.
  • the holder 6 rests against the die 3 over a cylindrical tube 8.
  • Method for hydrostatic extrusion of tubing in a press comprising a high pressure cylinder (1), a high pressure piston (2) projecting into one end of the cylinder, a die (3) arranged at the other end of the cylinder, a mandrel (5) arranged in the center of the cylinder and a billet holder (9) comprising an annular piston which seals tightly against the cylinder wall and around the outside of the mandrel and is provided with a valve (10) which permits a pressure medium to pass at a certain pressure from one side of the billet holder until the pressure medium passes through the valve and produces extrusion of the billet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Forging (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US00230726A 1971-03-15 1972-03-01 Press for hydrostatic extrusion of tubing Expired - Lifetime US3727444A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE03280/71A SE364650B (de) 1971-03-15 1971-03-15

Publications (1)

Publication Number Publication Date
US3727444A true US3727444A (en) 1973-04-17

Family

ID=20261772

Family Applications (1)

Application Number Title Priority Date Filing Date
US00230726A Expired - Lifetime US3727444A (en) 1971-03-15 1972-03-01 Press for hydrostatic extrusion of tubing

Country Status (7)

Country Link
US (1) US3727444A (de)
JP (1) JPS5429989B1 (de)
CA (1) CA952856A (de)
DE (1) DE2211652C3 (de)
FR (1) FR2130265B1 (de)
GB (1) GB1373674A (de)
SE (1) SE364650B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808860A (en) * 1971-08-18 1974-05-07 Kobe Steel Ltd Method and apparatus for manufacturing tubes or tubular bodies with inner walls having cross sections of irregular shapes
US4031732A (en) * 1974-06-07 1977-06-28 Asea Method for hydrostatic extrusion of tubes
USRE29344E (en) * 1971-08-18 1977-08-09 Kobe Steel, Ltd. Method and apparatus for manufacturing tubes or tubular bodies with inner walls having cross sections of irregular shapes
CN100469472C (zh) * 2007-03-16 2009-03-18 清华大学 双层复合管半固态多坯料挤压成形工艺及其装置
CN105414223A (zh) * 2015-12-21 2016-03-23 艾德义 摩托车减震器定位管冷加工模具

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2225224B1 (de) * 1973-04-11 1977-03-04 Kobe Steel Ltd

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3531965A (en) * 1967-10-06 1970-10-06 Asea Ab Press stand for hydrostatic extrusion of a billet
US3702556A (en) * 1970-04-30 1972-11-14 Asea Ab Method of hydrostatic extrusion

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3531965A (en) * 1967-10-06 1970-10-06 Asea Ab Press stand for hydrostatic extrusion of a billet
US3702556A (en) * 1970-04-30 1972-11-14 Asea Ab Method of hydrostatic extrusion

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808860A (en) * 1971-08-18 1974-05-07 Kobe Steel Ltd Method and apparatus for manufacturing tubes or tubular bodies with inner walls having cross sections of irregular shapes
USRE29344E (en) * 1971-08-18 1977-08-09 Kobe Steel, Ltd. Method and apparatus for manufacturing tubes or tubular bodies with inner walls having cross sections of irregular shapes
US4031732A (en) * 1974-06-07 1977-06-28 Asea Method for hydrostatic extrusion of tubes
CN100469472C (zh) * 2007-03-16 2009-03-18 清华大学 双层复合管半固态多坯料挤压成形工艺及其装置
CN105414223A (zh) * 2015-12-21 2016-03-23 艾德义 摩托车减震器定位管冷加工模具

Also Published As

Publication number Publication date
JPS5429989B1 (de) 1979-09-27
DE2211652A1 (de) 1972-09-21
GB1373674A (en) 1974-11-13
FR2130265B1 (de) 1977-12-23
DE2211652C3 (de) 1974-11-14
SE364650B (de) 1974-03-04
DE2211652B2 (de) 1974-03-28
FR2130265A1 (de) 1972-11-03
CA952856A (en) 1974-08-13

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