MODULAR CUTTING TOOL Russian patent published in 2015 - IPC B23B27/16 B23C5/22 

FIELD: process engineering.

SUBSTANCE: claimed tool comprises body with at least one seat to receive the insert to be secured by fastening screw with head and threaded part and extra fastening element. Note here that insert has top surface to support front surface, bottom bearing surface, side surface arranged between top and bottom surfaces, and through stepped bore extending between top and bottom surfaces. Bottom bearing surface is arranged, mainly, parallel with top surface while intersection between side surface and front surface composed the insert cutting edges. Said stepped bore has part of smaller size with section for interaction with fastening screw head abutting on top surface and larger-size part abutting on bottom bearing surface. Note also that body seat or every seat is confined by bottom bearing wall for interaction with insert bottom bearing surface and side wall or walls for interaction with insert side surface. Composite cutting tool is provided with thrust screw with head with thrust surface fitted in bore made in body seat. Mind that extra fastening element is composed of lever with side thrust surface, threaded bore and two ledges. Lever side bearing surface is intended for interaction with extra bearing wall made in the seat or every seat of the body. Threaded bore receives fastening screw threaded part. Said lever ledges are located opposite the lever side bearing surface relative to lever threaded bore. One ledge is intended for interaction with said part of larger stepped bore of insert while another ledge interacts with fastening screw head surface. note here that said lever is fitted in slot made in seat bottom bearing wall and confined by extra bearing wall on one side and on opposite by that extending into body bore.

EFFECT: higher reliability of insert fastening.

2 cl, 2 dwg