EP 0615794 B1 19961204 - Method to produce a plug chamber for cascade drawing of tubes and device for carrying out the method
Title (en)
Method to produce a plug chamber for cascade drawing of tubes and device for carrying out the method
Title (de)
Verfahren zur Herstellung einer Stopfenkammer beim Kaskadenziehen von Rohren und Vorrichtung zur Durchführung des Verfahrens
Title (fr)
Procédé pour fabriquer une chambre de mandrin pour le filage en cascade de tubes et dispositif pour sa mise en oeuvre
Publication
Application
Priority
DE 4306181 A 19930227
Abstract (en)
[origin: US5467631A] A method and apparatus for manufacturing a plug-type chamber to accommodate at least two floating plugs for use in the cascade drawing of tubes is disclosed. A starting tube is first fixed in position by a clamping and denting device. A necking-down ring is subsequently moved with the help of a necking-down cylinder along a freely projecting end section of the starting tube. A punch is then pushed with the help of a cylinder into the end section of the tube. When the punch has reached its end position, the necking-down ring is pulled over the end section of the tube, and the outside diameter is reduced to its original size. The punch is subsequently removed, and two indentations are made on the periphery of the end section of the starting tube with the help of the clamping and denting device. Together with a drawing point produced through the reshaping of the unattached end of the starting tube, these indentations then form a plug-type chamber, in which several floating plugs are embedded, which interact with drawing dies during the cascade-drawing operation.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
B21C 1/24 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI NL PT SE
DOCDB simple family (publication)
US 5467631 A 19951121; AT E145843 T1 19961215; AU 5640594 A 19940901; AU 664943 B2 19951207; BR 9400688 A 19940927; CA 2115858 A1 19940828; CA 2115858 C 19980714; DE 4306181 A1 19940901; DE 59401175 D1 19970116; EP 0615794 A1 19940921; EP 0615794 B1 19961204; ES 2095688 T3 19970216; FI 108005 B 20011115; FI 940910 A0 19940225; FI 940910 A 19940828; GR 3021911 T3 19970331; JP 3313870 B2 20020812; JP H06315715 A 19941115; MX 9401270 A 19940831; ZA 941245 B 19950124
DOCDB simple family (application)
US 20314694 A 19940228; AT 94101369 T 19940131; AU 5640594 A 19940225; BR 9400688 A 19940225; CA 2115858 A 19940217; DE 4306181 A 19930227; DE 59401175 T 19940131; EP 94101369 A 19940131; ES 94101369 T 19940131; FI 940910 A 19940225; GR 960403111 T 19961205; JP 2820894 A 19940225; MX 9401270 A 19940218; ZA 941245 A 19940223