TOOL MANDREL WITH HIGH RIGIDITY AND VIBRATION RESISTANCE Russian patent published in 2022 - IPC B23Q3/14 B23B29/00 

FIELD: machine tools.

SUBSTANCE: invention relates to processing materials by cutting and can be used in tool holders, in particular, for turning, milling, drilling, boring, and grinding machines. Tool mandrel consists of a hollow body accommodating a system for creating a prestressed state, consisting of a mobile and a fixed inserts and a nut. The fixed insert is secured to the body. Stepwise-arranged bevels forming a wedge pair are made on both inserts. One end of the mobile insert is made with a threaded protrusion located at least partially outside the body and intended for placement of said nut, and the second end is made with elements for securing the working tool thereon.

EFFECT: rigidity of the mandrel along the entire length thereof is increased, roughness of the processed surface is reduced, operating life of the mandrel is increased.

4 cl, 4 dwg