494 Каталог SUMITOMO 2018 Инструмент металлорежущий Пластины Резцы Фрезы Сверла Стр.L22

Каталог SUMITOMO 2018 Инструмент металлорежущий Стр. L22 0494 Lab2u

SUMIBORON SUMIDIA SUMIBORON / SUMIDIA Production Process General Since 1970s, Sumitomo has pioneered the development of sintered cubic boron nitride (CBN) and sintered diamond (PCD) tools successfully used in the tool making industries. These tool materials can be epoch-making in a sence of broadening the cutting application range. I Production Process In the production process of SUMIBORON / SUMIDIA, CBN powder / diamond powder is firstly synthesized under the ultra - high pressure, and secondly, the synthesized crystalline grains are sintered. Fig. 2 shows a diagram of high temperature high pressure apparatus for processing the ultra - high pressure sintering operation. This apparatus is basically composed of a piston and a cylinder to generate ultra - high pressure as high as 5000 N/ mm2 with a special device. The piston and cylinder are made of cemented carbide. Fig. 1 Graphite / hBN Fig. 2 l Pressure gUpport 4 steel ring f Ultra high pressure V synthesizing CBN / Diamond Binder Electrode Ultra high pressure y synthesizing Sumiboron / Sumidia To manufacture final products round discs of SUMIBORON and SUMIDIA material are cut into specific shapes and brazed on to tool bodies made of cemented carbide, or steel, etc., and after that finished by grinding the edge. In another process the final product can be obtained only by cutting blanks and finishing them. Carbide piston Carbid cylinder I SumiBoron / SumiDia Grinding Method Items SumiBoron SumiDia Grinding machine - 1) Carbide grinding machine is applicable. 2) R Pointer should be used. 3) Should be wet grinding. 1) Special-purpose high rigidity grinding machine is desirable. 2) Be sure of applying with wet system. Wheel Abrasive Diamond Diamond Grain size D 25 - medium, D20 - fine ( 400 800) Rough grinding: D 35 ( 400 mesh) Finish grinding: D 25 ( 800 1500 mesh) Bond Resinoid or vitrified Special-purpose metal bond for diamond sintered tool or vitrified Concentration 100 100 125 Dressing Use 400 WA stick Execute dressing with a WA stick of about 400 mesh. Grinding condition Wheel speed 800 1000 m/min. 800 1000 m/min. Table cycle 30 60 cycles/min. 30 60 cycles/min. Grinding oil Water soluble grinding coolant oil Water soluble grinding coolant (Solution type) Others - 1) Check chipping of the cutting edge with microscope after finishing. 2) Blank surface cut by EDM should be ground more than 0,05 mm 1) Rake surface is lapped generally 2) Inspect with microscope of magnification of 30-50 times if there is edge chipping. 3) Edge treatment of tool should be sharp for cutting non-ferrous metals. 4) Remove the wire-cut surface of blank by 0,05 mm or more in grinding operation. L22