Каталог Iscar токарный инструмент 2017 - страница 357

USER GUIDE • JETCUT Tools High Pressure (up to 340 Bar) The high pressure coolant feature has been in General Information existence for a long time in the metal removal Pressure Ranges world, taking a bigger role in today’s machining. Up to 30 Bar – Low pressure (LP) may provide ISCAR was one of the first cutting tools companies to some improvement in tool life. Usually will respond to market needs by designing and producing not have an effect on chip control. tools for ultra high and high pressure coolant flow. 30 – 120 Bar – High pressure (HP) the most commonly used pressure range used with JETCUT tools. GROOVE-TURN High pressure coolant was initially implemented Increase in tool life, increase in cutting mainly for difficult-to-machine materials such as speeds, improved chip control. titanium, inconel and other heat resistant alloys. 120 – 400 Bar – Ultra high pressure (UHP) requires Later it was found that tool-life, productivity special tool design in order to take advantage and chip control can be improved when of the extra pressure. Minor increase in machining stainless and alloyed steel. tool life compared to HP range. Ultra high pressure coolant is usually implemented for JETCUT tools are essential and important in the machining titanium and heat resistant alloys when aviation, aerospace and medical industries. there is a need for very small chips and higher machining rates. How does it work? Since 2000, ISCAR has provided hundreds of The stream velocity of the coolant emitted from the special tools featuring ultra high pressure coolant pump increases as the coolant holes become smaller. capability, for various customers and applications. When it emerges out of the tool through the nozzle, the velocity is very high, exerting considerable Pressure vs. Flow force on the chips, lowering their temperature and Each JETCUT tool is designed to work at a certain flow protecting the cutting edge from thermal shock. rate, depending on the pressure. The flow rates are listed High temperature alloys produce a very high temperature in the catalog pages for each tool. The user should verify as they are being cut. By effectively removing the heat, that his pump can supply the required flow in order to the chips become less ductile and thus easier to break. achieve the optimal results. The pump data sheet will Shorter chips are easily managed - they do not usually list the maximum flow rate for each pressure range. tangle around the workpiece or machine parts, so there is no need to stop the process frequently. Chips & Pressure Usually in conventional cooling the chip prevents The coolant flow will start to break the chips at a the coolant from reaching the insert rake face in the certain pressure, depending on the specific tool cutting zone. The coolant stream of the JETCUT and the workpiece material. If the chips are not tools is directed precisely between the insert rake breaking, the pressure should be increased until face and the flowing chip. This results in longer chip control is achieved. Above this pressure, as tool life and a much more reliable process. it is increased the chips become smaller and smaller. It is possible to control the size of the chips by modifying the pressure in order to achieve the desired chip size. The coolant channels of the JETCUT tools feature outlets very close to the cutting edges, thus gaining the following advantages: • Shorter machining time – the cutting speed may be increased by up to 200% when machining titanium & heat resistant alloys • Longer tool life – tool life increases by up to 100% not only on titanium and heat resistant alloys, but also on stainless and alloy steels • Improved chip control – even on the most ductile and problematic materials, small chips can be obtained • Very effective cooling down of the cutting edge, which reduces sensitivity to heat fluctuations • Safer and more stable process JETCUT tools provide advantageous performance also when conventional pressure is applied. 353 353