WO2002018071A1 - Die tooling - Google Patents
Die tooling Download PDFInfo
- Publication number
- WO2002018071A1 WO2002018071A1 PCT/EP2001/010723 EP0110723W WO0218071A1 WO 2002018071 A1 WO2002018071 A1 WO 2002018071A1 EP 0110723 W EP0110723 W EP 0110723W WO 0218071 A1 WO0218071 A1 WO 0218071A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- die
- nitrogen
- downstream
- ducting
- upstream
- Prior art date
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
- B21C25/00—Profiling tools for metal extruding
- B21C25/08—Dies or mandrels with section variable during extruding, e.g. for making tapered work; Controlling variation
-
- 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
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- 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
- B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
- B21C29/04—Cooling or heating of press heads, dies or mandrels
Definitions
- the present invention relates to a method of and die for extruding aluminium and aluminium alloys.
- British Patent Specification No. 2285941A describes the use of an extrusion die having a frustro-conical upstream 1 entrant section diminishing downstream followed by a . cylindrical or rectilinear bearing section where opposed bearing surfaces are parallel to each other.
- Such a die is used for hot extruding 2000 series aluminium, alloys: and whereas dies of this conformation have reduced peripheral coarse grain banding at certain speeds, it has: been found that surface break up and/or deterioration of; extruded material can exist under certain conditions.
- a die having an upstream entrant section diminishing dowjnstream characterised in that the upstream entrant section has a first tapering surface and a second tapiering surface downstream of the first surface.
- the first surface has less of an angular taper than that of the second surface.
- the first surface has the effect of suppressing non- preferred grain structures, for example peripheral coarse grain (P.C.G.), while the second surface has the additional benefit of improving the surface finish of the extjcusion.
- P.C.G. peripheral coarse grain
- the upstream section is made with a first and a second part, the first part having the first surface and the second having the second surface, the parts being separable so that the whole die can be adjusted for the particular alloy in use by, for instance, retaining the first part and changing ! the- second part to provide a different taper.
- This is n' economic way of changing the whole die configuration to; control the microstructure although it may be preferable 1 to Iform the die in one piece.
- the second surface stairts upstream from a wider point of the whole die than that at the downstream end of the first surface.
- the metal being extruded is allowed to preform its shape with the first shape and form the final shape with the second surface, the two surfaces being separated by a gapi, the second surface of course being of a smaller cross-sectional area.
- The. first and second surfaces may be rectilinear or be circular in cross-section.
- the first surface preferably tapers at 2-6° similar to that described in GB 2285941A but; within a range of 1.5°-2. ⁇ ° and within the disclosed ran e described in 941A publication whilst the second surface tapers at an angle of preferably 7 0 .f;'and within a range of 3° to 45° , but at a greater angle to that of the fir ⁇ t surface.
- Nitrogen inerting and/or cooling ducting may be provided between the first and second parts where these are separate.
- the first and second surfaces may- e nitrided.
- Upstream entrants to the die parts may be : . radiused or curved.
- a method of extruding aluminium and aluminium alloys comprises proyided a die as set out above according to the first aspect of the invention and any of its supplementary features, and cooling and/or inerting the die with a flow of . gaseous or liquid nitrogen according to a predetermined formula according to the cross-sectional aspect of this backer section, and the extruded shape.
- the -predetermined formula for flow rate of nitr iogen for round bar is 3.142T (D+T) x 10 ⁇ 5 x 6V in mVliiour where T Is the distance between the bar and backer, D is the bar diameter in mm and V is the extrusion spee " in metres/min.
- the predetermined formula to flow rate of nitrogen for flat bar is 2T (B + W + 2T) x 10" 5 x 6V in m/Vhour where T is the distance between the bar and backer, B is the bar thickness in mm, W? is the bar thickness in mm and V is the extrusion speed in metres/min.
- Figure 1 shows the relation of die surfaces according to one embodiment of the invention where the upper section surfaces are continuous
- Figure 2 is a similar view to Figure 1, shows a second embodiment of an invention where the Upper section surfaces are discontinuous;
- Figure 3 is a similar view to Figure 2, but in a third embodiment where the die of Figure 2 is modified so as to be in two parts;
- Figure 4 shows the provision of nitrogen ducting for the' second embodiment
- Figure 5 shows the provision of nitrogen ducting for a third embodiment.
- a longitudinal cross-section of the die 2 shows a first and upstream entrant surface 3 continuing downstream to a second and downstream surface 4.
- a further downstream surface 5 has no taper.
- the first surface has' a taper within the range 1.5° to 2.6° whilst the ' second surface has a taper within the range 3° to 45° and! preferably 7°,
- the first, second and further surfaces are respectively 20-lOOmm, 4 ⁇ 20mm and 0-12mm long, whilst a 1 to 20mm wide gap 6 is provided between the downstream end of the further surface and the backer 7.
- the tapered form may be applied to a die for round or flat bar.
- the first upstream entrant surface 13 of the upsjtream section 12 continues downstream .with a non- tapered surface 13.
- the second surface 14 has a greater taper and a discontinuity 20 between the surfaces 18 and 14 to preform the extrusion at surface 18 before achieving the final shape at surface 19.
- the orifice of the die at surface 19 has a smaller cross-sectional area than that at surface 18.
- Surface 19 is non-tapered and is provided downstream of surface 14 with a gap 16 between surface 19 and backer 7.
- the first, second, third and fourth surfaces are respectively 20-100mm, 0- 12mm, 4-20mm and 0-12mm long, whilst a l-50mm gap 20 is provided between the second and third surfaces 18 and 14.
- nitrogen inerting or cooling either in gaseous or liquid form is ducted through duct 40 in die backer 7' to a ring feed duct 44 in die backer 7' .
- the nitrogen duct 44 exits via a number of ducts shown by example as duct 46 in backer 7' within the space between the backer and- extruded metal to cool the die and extrusion and inhibit surface oxidation of the aluminium alloy extrusion- (i.e. "inerting").
- Duct 72 is bounded by the outer surface of inner die parti 48' .
- the helical duct 72 communicates with duct 73 between first and inner die part 48' and second die parti 49'. thence to space 57' around extrusion 66 then through: duct 74 in part 49' to ring duct 59 and- out through a . number of ducts shown typically as 62. as in the, embodiment shown in Figure 5.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002213926A AU2002213926A1 (en) | 2000-08-30 | 2001-08-30 | Die tooling |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0021333A GB2366226B (en) | 2000-08-30 | 2000-08-30 | Die tooling |
GB0021333.0 | 2000-08-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002018071A1 true WO2002018071A1 (en) | 2002-03-07 |
Family
ID=9898554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2001/010723 WO2002018071A1 (en) | 2000-08-30 | 2001-08-30 | Die tooling |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2002213926A1 (en) |
GB (1) | GB2366226B (en) |
WO (1) | WO2002018071A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1632295A1 (en) * | 2004-09-06 | 2006-03-08 | Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO | High speed metal extrusion |
CN103537543A (en) * | 2012-07-12 | 2014-01-29 | 北京爱康宜诚医疗器材股份有限公司 | Center control body stamping die |
CN104801561A (en) * | 2015-04-21 | 2015-07-29 | 苏州铭德铝业有限公司 | Extrusion die |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0806078D0 (en) * | 2008-04-04 | 2008-05-14 | Preform Dies Ltd | Extrusion die |
CN104056869B (en) * | 2014-07-03 | 2016-08-03 | 辽宁忠旺集团有限公司 | 7 line aluminium alloy large extrusion die |
CN106636697B (en) * | 2016-12-09 | 2018-08-07 | 重庆固鼎合金材料有限公司 | Al-sr alloy production technology |
DE102017106969B4 (en) | 2017-03-31 | 2020-08-06 | Wefa Singen Gmbh | Method of making an extrusion die |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2206977A (en) * | 1937-11-20 | 1940-07-09 | Western Electric Co | Apparatus for extruding metal sheath or pipe |
US3364707A (en) * | 1965-02-16 | 1968-01-23 | Dow Chemical Co | Extrusion forming member and method |
US3553996A (en) * | 1967-11-13 | 1971-01-12 | Battelle Development Corp | Extrusion of brittle materials |
US3973428A (en) * | 1975-04-07 | 1976-08-10 | Westinghouse Electric Corporation | Uniform land length die |
US4036043A (en) * | 1974-10-18 | 1977-07-19 | Kobe Steel Ltd. | Extrusion die for hot hydrostatic extrusion of aluminum and aluminum alloys |
US4462234A (en) * | 1980-06-19 | 1984-07-31 | Battelle Development Corporation | Rapid extrusion of hot-short-sensitive alloys |
GB2285941A (en) * | 1994-01-27 | 1995-08-02 | Alcan Int Ltd | Extrusion Method |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE345399B (en) * | 1967-06-30 | 1972-05-29 | Asea Ab |
-
2000
- 2000-08-30 GB GB0021333A patent/GB2366226B/en not_active Expired - Lifetime
-
2001
- 2001-08-30 WO PCT/EP2001/010723 patent/WO2002018071A1/en active Application Filing
- 2001-08-30 AU AU2002213926A patent/AU2002213926A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2206977A (en) * | 1937-11-20 | 1940-07-09 | Western Electric Co | Apparatus for extruding metal sheath or pipe |
US3364707A (en) * | 1965-02-16 | 1968-01-23 | Dow Chemical Co | Extrusion forming member and method |
US3553996A (en) * | 1967-11-13 | 1971-01-12 | Battelle Development Corp | Extrusion of brittle materials |
US4036043A (en) * | 1974-10-18 | 1977-07-19 | Kobe Steel Ltd. | Extrusion die for hot hydrostatic extrusion of aluminum and aluminum alloys |
US3973428A (en) * | 1975-04-07 | 1976-08-10 | Westinghouse Electric Corporation | Uniform land length die |
US4462234A (en) * | 1980-06-19 | 1984-07-31 | Battelle Development Corporation | Rapid extrusion of hot-short-sensitive alloys |
GB2285941A (en) * | 1994-01-27 | 1995-08-02 | Alcan Int Ltd | Extrusion Method |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1632295A1 (en) * | 2004-09-06 | 2006-03-08 | Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO | High speed metal extrusion |
WO2006028367A1 (en) * | 2004-09-06 | 2006-03-16 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | High speed extrusion |
US7992419B2 (en) | 2004-09-06 | 2011-08-09 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | High speed extrusion |
CN103537543A (en) * | 2012-07-12 | 2014-01-29 | 北京爱康宜诚医疗器材股份有限公司 | Center control body stamping die |
CN104801561A (en) * | 2015-04-21 | 2015-07-29 | 苏州铭德铝业有限公司 | Extrusion die |
Also Published As
Publication number | Publication date |
---|---|
GB2366226A (en) | 2002-03-06 |
GB0021333D0 (en) | 2000-10-18 |
GB2366226B (en) | 2003-02-12 |
AU2002213926A1 (en) | 2002-03-13 |
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