FORM MILLING CUTTER FOR THE MACHINING OF TITANIUM ALLOYS ETC

摘要

A method of manufacturing a multi-tooth fir-tree or bulbous form milling cutter, by the grinding of a blank with a grinding wheel, wherein, a flat clearance angle Θ of between 0° and 20° is generated on each tooth (13) by the path (14) of the grinding wheel (10), with each tooth (13) having a width (X) from tip to point of maximum clearance (see Figure 5), calculated as follows:- X = {[(RtanΘ)cosΘ]cosΘ}±0.25% (being calculation (A)) where R = radius of cutter, and where Θ = clearance angle measured from a tangent to the tooth tip, and furthermore, wherein, each tooth (13) has a variable depth (Y) around the cutter, calculated as follows:- Y = {[πD] / [180/Θ]} 0.5 ±0.2. (being calculation (B)) where D = maximum diameter of the form at any given point along the form. The invention also includes fir tree and bulbous milling cutters produced by the above defined method.