EP 0192584 B1 19891220 - METHOD AND APPARATUS FOR MAKING GROOVES IN A SURFACE OF REVOLUTION
Title (en)
METHOD AND APPARATUS FOR MAKING GROOVES IN A SURFACE OF REVOLUTION
Publication
Application
Priority
FR 8501330 A 19850123
Abstract (en)
[origin: WO8604274A1] The method according to the invention relates to the making, without material removal, of grooves such as helical threads on the wall of tubes made of ductile or plastic materials. It consists in operating a knurling roller (11) having a radius (R1) which may freely rotate about an axis (X3). Said axis describes in the direction indicated by the arrow (F2) a predetermined closed curve (12) which is in the case of the figure a circumference having a radius (R2) and an axis (X4). The envelope-curve of the path of the forming edge (15) of the nearling tool presents with the revolution wall (10) having the axis (X2) an intersection area (13). The diameter of the knurling roller is bigger than the diameter of the circumference (12). A helical thread is obtained by the relative displacement of the revolution wall (10) along its axis (X2) with respect to the knurling roller (11).
IPC 1-7
IPC 8 full level
B21H 3/04 (2006.01); B21C 37/20 (2006.01); B21D 17/04 (2006.01); B29C 59/04 (2006.01)
CPC (source: EP US)
B21C 37/205 (2013.01 - EP US); B21D 17/04 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0192584 A1 19860827; EP 0192584 B1 19891220; AT E48771 T1 19900115; CA 1293845 C 19920107; DE 3667618 D1 19900125; FR 2576228 A1 19860725; FR 2576228 B1 19891201; JP H0236329 B2 19900816; JP S62501488 A 19870618; SU 1729282 A3 19920423; US 4838066 A 19890613; WO 8604274 A1 19860731
DOCDB simple family (application)
EP 86420020 A 19860122; AT 86420020 T 19860122; CA 500070 A 19860122; DE 3667618 T 19860122; FR 8501330 A 19850123; FR 8600018 W 19860122; JP 50073186 A 19860122; SU 4028219 A 19860919; US 23859188 A 19880831