EP2379245B1 - Expansion dummy block for extruding press for hollow bodies - Google Patents
Expansion dummy block for extruding press for hollow bodies Download PDFInfo
- Publication number
- EP2379245B1 EP2379245B1 EP09803768.2A EP09803768A EP2379245B1 EP 2379245 B1 EP2379245 B1 EP 2379245B1 EP 09803768 A EP09803768 A EP 09803768A EP 2379245 B1 EP2379245 B1 EP 2379245B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dummy block
- hollow
- expansion
- internal
- expansion dummy
- 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.)
- Active
Links
- 239000000463 material Substances 0.000 claims description 20
- 238000001125 extrusion Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006049 ring expansion reaction Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
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
- B21C26/00—Rams or plungers; Discs therefor
-
- 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
Definitions
- a second type of press ( figures 2.1 and 2.2 ) is provided with an element named mandrel 21.
- the container 22 of billet 23 As well as a die 24 provided with a bottleneck, through which the material of the billet flows thus forming the external diameter of the tube.
- the mandrel 21 drives a hole into the billet, which is thus perforated, and at the end of the drilling operation it appears with the head inside the die ( fig. 2.2 ).
- the material of the billet is forced to pass through the circular crown delimited by die and mandrel, thus producing a tube which in this case is homogeneous because the dividing wings are no longer present, and therefore of higher quality.
- the machine is more complex because it has the additional part of the mandrel and the controlling device associated therewith.
- the expansion dummy block has a hollow shape so as to allow a mandrel to slide therein, and comprises the following elements, the peculiarities of which are also highlighted in the following figures, in addition to fig. 3 .
- This contrivance allows to avoid the use of the "dummy block recirculation" system and thus to save cycle time, reduce the need for maintenance, cut both machine costs and required energy - the extrusion is thus performed with fixed dummy block which does not need to be recirculated.
- the ring may be made of H13 tempered steel, which ensures a given degree of elasticity, and a high resistance to wear.
- the material is tool steel chosen from those available on the market.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Extrusion Of Metal (AREA)
- Manufacturing Of Electric Cables (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT002325A ITMI20082325A1 (it) | 2008-12-24 | 2008-12-24 | Tacco ad espansione per pressa per estrusione di corpi cavi |
PCT/EP2009/067889 WO2010072824A1 (en) | 2008-12-24 | 2009-12-23 | Expansion dummy block for extruding press for hollow bodies |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2379245A1 EP2379245A1 (en) | 2011-10-26 |
EP2379245B1 true EP2379245B1 (en) | 2015-07-08 |
Family
ID=41279366
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09803768.2A Active EP2379245B1 (en) | 2008-12-24 | 2009-12-23 | Expansion dummy block for extruding press for hollow bodies |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2379245B1 (it) |
IT (1) | ITMI20082325A1 (it) |
WO (1) | WO2010072824A1 (it) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106903178A (zh) * | 2017-02-17 | 2017-06-30 | 清华大学 | 一种具有组合式挤压轴的挤压机 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102962285A (zh) * | 2012-11-02 | 2013-03-13 | 无锡鸿声铝业有限公司 | 挤压垫装置 |
JP6253488B2 (ja) * | 2013-11-07 | 2017-12-27 | 新日鐵住金株式会社 | 前方押出加工方法、中空部材の製造方法及び前方押出加工装置 |
RU2016143752A (ru) * | 2014-05-22 | 2018-06-25 | Экско Текнолоджиз Лимитед | Пресс-шайба для экструзионного пресса |
CN116475258B (zh) * | 2023-06-15 | 2023-09-01 | 陕西长羽航空装备股份有限公司 | 一种航空飞机用大型钛合金深筒体反挤压锻造设备及方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE940104C (de) * | 1948-10-02 | 1956-03-08 | Felten & Guilleaume Carlswerk | Strangpressverfahren und Hohlstempel zum Verpressen von hintereinander folgenden Bloecken aus Metall |
US3296848A (en) * | 1963-10-21 | 1967-01-10 | Reynolds Metals Co | Method and apparatus for extruding tubular members from solid billets or the like |
BE739273A (it) * | 1968-10-16 | 1970-03-02 | ||
SU852400A1 (ru) * | 1979-07-24 | 1981-08-07 | Каменск-Уральский Ордена Трудовогокрасного Знамени Металлургическийзавод | Пресс-шайба дл прессовани МЕТАлличЕСКОй зАгОТОВКи |
JPS56175108U (it) * | 1980-05-29 | 1981-12-24 | ||
JPH0576927A (ja) * | 1991-04-23 | 1993-03-30 | Showa Alum Corp | マンドレル押出機用アタツチドダミー装置 |
US5918498A (en) * | 1996-07-18 | 1999-07-06 | Robbins; Paul H. | Dummy block construction |
-
2008
- 2008-12-24 IT IT002325A patent/ITMI20082325A1/it unknown
-
2009
- 2009-12-23 EP EP09803768.2A patent/EP2379245B1/en active Active
- 2009-12-23 WO PCT/EP2009/067889 patent/WO2010072824A1/en active Application Filing
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106903178A (zh) * | 2017-02-17 | 2017-06-30 | 清华大学 | 一种具有组合式挤压轴的挤压机 |
Also Published As
Publication number | Publication date |
---|---|
ITMI20082325A1 (it) | 2010-06-25 |
WO2010072824A1 (en) | 2010-07-01 |
EP2379245A1 (en) | 2011-10-26 |
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