Method for producing a cutting head
AssigneeKennametal Inc.
InventorTim Guter
Life of this patent
Estimating the term…
Abstract
A method for producing a replaceable cutting head is described. The replaceable cutting head is manufactured by extruding a blank. During extrusion of the blank, a number of helical coolant channels and a number of helical flutes are simultaneously formed. After extrusion, the flutes have a first angle of twist (D1), and the coolant channels have a second angle of twist (D2). After extrusion, the blank is sintered and then reworked to selectively adjust the first angle of twist (D1) and the pitch of the flutes. The method produces an endless blank that is capable of being parted off to a desired length without any sacrificial allowance, which provides significant material and cost savings as compared to conventional methods.
Claims8
A method of producing a replaceable cutting head, the replaceable cutting head comprising a plurality of cutting edges defining a cutting diameter, a plurality of coolant channels having a first angle of twist (D1), a plurality of flutes having a second angle of twist (D2) and a coupling element comprising a pin and a collar, the method comprising:
- extruding an endless blank to simultaneously form the plurality of coolant channels having the first angle of twist (D1) and the plurality of flutes having the second angle of twist (D2);
- cutting the endless blank to produce a first blank having a desired length (L) of a finished replaceable cutting head without any sacrificial allowance;
- and
- sintering the first blank;
- and
- reworking the first blank to form the coupling element comprising the pin and the collar for attaching the finished replaceable cutting head to a base body of a drill,
- wherein, after the step of cutting the endless blank to produce the first blank, cutting the endless blank again to produce a second blank for a second replaceable cutting head without any sacrificial allowance.
Dependencies are inferred from the claim text.