PATIL SANDIP PRAKASH (IN)
KALYANI BABASAHEB NEELKANTH (IN)
PATIL SANDIP PRAKASH (IN)
| AMENDED CLAI MS received by the International Bureau on 1 1 March 2016 (1 1.03.16) 1. A method of machining of work pieces made from hard-to-machine alloys, characterized in that said method comprises the following steps: providing an apparatus for machining and turning, said apparatus comprising a work piece holder for holding said work piece, a horn made of said hard-to-machine alloy on which a cutting tool is mounted, a tool assembly holder, a concentrator, a piezoelectric transducer, an electric signal generator, - holding securely said work piece in said work piece holder, - rotating said work piece about its central axis, - transferring electric signal from said generator to said piezoelectric transducer, - using piezoelectric transducer, converting said electric signal into high frequency mechanical vibrations having a frequency greater than 15kHz, amplifying said mechanical vibrations using the concentrator to an amplitude greater than 10 μπι, - transferring said amplified vibrations via the horn to the cutting tool insert, - holding in a tool holder the entire vibrating assembly comprising said insert (tool), said horn, said concentrator, said piezoelectric transducer, and said electric signal generator, 1 - bringing said tool holder, by moving it in the direction perpendicular to the plane of rotation of said work piece, maintaining it in contact with said work piece, - maintaining the forward movement of said tool holder while maintaining said vibration of the cutting insert in a direction parallel to said axis of rotation of said work piece, thereby maintaining an intermittent contact between said work piece and said tool insert. 2. A method as claimed in claim 1, characterized in that said high frequency vibrations have a frequency in the range of 15 kHz to 25 kHz and an amplitude in the range of 10 μιη to 40 μιη. 3. A method as claimed in claim 1 to 2, characterized in that said machining process is turning. 4. A method as claimed in claims 1 to 3, characterised in that said high frequency vibrations have a frequency of 20 kHz and an amplitude of 20 μιη. 5. A method as claimed in claims 1 to 4, characterized in that said hard to machine alloy is Titanium Ti6A14V. 6. A method claimed in claims 1 to 5, characterized in that said high frequency vibrations are induced in the direction parallel to the axis of rotation of said work piece. 7. A method as claimed in claims 1 to 6, characterized in that said work piece is rotated at a constant speed in the range of 150 to of 330 mm/s. 2 |