FIELD: process engineering.
SUBSTANCE: invention relates to production of cutters from cemented carbide with superhard tips for destruction of hard and abrasive materials. Cutter (100) comprises insert (110) including superhard tip (112) jointed with support body (114) from cemented carbide with stem (118) and steel holder (120) for said insert (110). Steel holder (120) comprises shaft (122) for connection with tool arbour (not shown) and channel (126) to accommodate stem (118). Said stem fits in said channel through at least 4 cm. Volume of support body (114) from cemented carbide makes at least 10 cm3. Stem surface area adjoins the channel surface inner area making at least 20 cm3 while stem diameter making at least 1.5 cm and not over 4.0 cm. Cutter stem is fitted in steel holder channel with interference fit of 0.002-0.3%.
EFFECT: higher tool hardness, longer life.
13 cl, 11 dwg, 1 tbl
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