NEW EXTRUSION PROCESS FOR PRODUCING TWIST DRILLS USING SPLIT DIES
Tomasz BULZAK
t.bulzak@pollub.plLublin University of Technology, Nadbystrzycka Street 36, 20-618 Lublin (Poland)
Zbigniew PATER
Lublin University of Technology, Nadbystrzycka Street 36, 20-618 Lublin (Poland)
Janusz TOMCZAK
Lublin University of Technology, Nadbystrzycka Street 36, 20-618 Lublin (Poland)
Abstract
The paper presents a new extrusion process for producing twist drills using split dies. The design of the dies is described, where the profile of the flute-forming element is the same as the profile of the flute on the plane inclined to the drill axis at an angle equal to the helix angle. The proposed method for the extrusion of twist drills by the new type of dies is verified by numerical modeling. Three cases of the extrusion process are modelled, each with a different position of the flute-forming element relative to the axis of the drill. The paper investigates the effect of the position of the flute-forming element on the angle of inclination of the flutes and the cross-section shape of the drill. Numerical modeling is performed using DEFORM-3D.
Keywords:
extrusion, twist drill, FEM, experimentReferences
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Authors
Tomasz BULZAKt.bulzak@pollub.pl
Lublin University of Technology, Nadbystrzycka Street 36, 20-618 Lublin Poland
Authors
Zbigniew PATERLublin University of Technology, Nadbystrzycka Street 36, 20-618 Lublin Poland
Authors
Janusz TOMCZAKLublin University of Technology, Nadbystrzycka Street 36, 20-618 Lublin Poland
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