Ultrasonic knife and ultrasonic cutting system
AssigneeCeratizit Como S.P.A.
InventorsAntonello Valsecchi, Bernardo Bezzola
Life of this patent
Estimating the term…
Abstract
An ultrasonic knife has a cutting portion formed with at least one cutting edge and a fastening portion. The fastening portion has an external thread for connection to a sonotrode. The cutting portion and the fastening portion are formed in one piece from cemented carbide material. The cemented carbide material includes hard particles that are, at least predominantly, formed by tungsten carbide and a metallic binder. The external thread of the fastening portion has a thread pitch p and is shaped such that the root of the thread turns has a rounded shape with a root radius R of 0.2*p≤R≤0.3*p.
Claims20
An ultrasonic knife, comprising:
- a cutting portion formed with at least one cutting edge and a fastening portion formed with an external thread for connection to a sonotrode;
- said cutting portion and said fastening portion being formed in one piece from cemented carbide material;
- said cemented carbide material comprising hard particles, at least predominantly formed by tungsten carbide, and a metallic binder;
- and
- said external thread of said fastening portion having a thread pitch p and thread turns with a root having a rounded shape with a root radius R being 0.2*p≤R≤0.3*p.
An ultrasonic knife, comprising:
- a cutting portion formed with at least one cutting edge and a fastening portion formed with an external thread for connection to a sonotrode;
- said cutting portion and said fastening portion being formed in one piece from cemented carbide material;
- said cemented carbide material comprising hard particles, at least predominantly formed by tungsten carbide, and a metallic binder, and said cemented carbide material being composed of:
- 5.5-13 wt.-% Co, preferably 6.5-11 wt.-% Co;
- a Cr content with a ratio of Cr/Co in wt.-% of 0.04≤Cr/Co≤0.06;
- a Mo content with a ratio of Mo/Co in wt.-% of 0.02≤Mo/Co≤0.04;
- a content of V and Cr relative to Co in wt.-% of 0.04≤(V+Cr)/Co≤0.07;
- unavoidable impurities of in total ≤0.15 wt.-%;
- and
- remainder WC.
Dependencies are inferred from the claim text.