Method and apparatus for producing undercut grooves
OwnerJurgen Daubinventor
Life of this patent
Estimating the term…
Abstract
In the production of rotor grooves, between the usual undercut-free opening of the groove with a disk milling cutter and profile milling by means of a high speed, high performance steel profile shaft milling cutter, a preliminary fine cutting operation is inserted, in which the profile form is premachined with a profile shaft milling cutter equipped with indexable cutting bits. The profile shaft milling cutter used for the purpose has a greater number of cutting surfaces at its tooth tips than at its tooth flanks. The cutting surfaces defined by overlapping, in circumferential direction, of the cutting edges of the indexable cutting bits are interrupted, so that substantially flat and hardly stiff chips are produced.
Claims27
A workpiece material removal tool (1) for simultaneous machining or production of surfaces that form angles with one another, comprising:
- a tool body (5) rotatable about a longitudinal center axis (11);
- at least first, second and third cutting edges (28', 34, 34') formed on cutting inserts (27, 27'), the cutting inserts being secured on the tool body (5), wherein said cutting edges, upon a rotation of the tool body (5) about its longitudinal center axis (11), define a theoretical body of rotation whose contour matches a contour of the workpiece surfaces to be machined, and at least said first and second cutting edges (28', 34) forming first and second surfaces on the workpiece, said first and second surfaces defining respective first and second different angels with respect to the longitudinal center axis (11), the first angle being larger than the second angle;
- and
- wherein the second and third cutting edges (34, 34') form a common surface corresponding to the second surface and the second angle, the number of cutting edges which form the common surface being greater than the number of cutting edges (28') which form the first surface corresponding to the first angle.
A workpiece material removal tool (1) for simultaneous machining or production of surfaces that form an angle with one another, comprising:
- a tool body (5) rotatable about a longitudinal center axis (11);
- at least first, second and third cutting edges (28', 34, 34') formed on cutting inserts (27, 27'), the cutting inserts being secured on the tool body (5), wherein said cutting edges, upon a rotation of the tool body (5) about its longitudinal center axis (11), define a theoretical body of rotation whose contour matches a contour of the workpiece surfaces to be machined, and at least said first and second cutting edges (28', 34) forming first and second surfaces on the workpiece, said first and second surfaces corresponding to respective first and second different angles on the workpiece with respect to a feed direction (43), the first angle being larger than the second angle;
- and
- wherein the number of cutting edges (28') that form the second, smaller angle is less than the number of cutting edges (34, 34') that form the first, larger angle with the feed direction (43).
Dependencies are inferred from the claim text.