TOOL FOR METAL ROD CUTTING Russian patent published in 2008 - IPC B23D29/00 

FIELD: technological processes.

SUBSTANCE: tool includes a pair of cutting knives and coupled power arms. Cutting knives feature semicylindrical grooves located in the middle knife part in the contact zone and facing each other. The grooves hold cylindrical block preventing mutual displacement of cutting knives against each other in lengthwise direction, with side pads preventing axial displacement of the block. Cutting knives are connected in their middle parts in hinge pattern by side pads with power hinges. Loose ends of cutting knives feature jaws with double-sided cutting edge forming a blade. Coupled power arms are connected to cutting knives in a hinge pattern. Jaw blades of cutting knives have concave arc form and face each other to form lens-shaped gap with maximum size over 1/4 and under 1/3 of the cut material diameter. Side pads feature segment-shaped grooves at their facets, with convex sides oriented to longitudinal pad axis passing through centres of power hinges.

EFFECT: increased diameter of object cut, and smooth cutting process.

4 dwg