1478 Каталог KENNAMETAL 2013 Инструментальная оснастка для металлорежущих станков Стр.M78

Каталог KENNAMETAL 2013 Инструментальная оснастка Стр. M78 1478 Lab2u

Technical Information Technical Information Shrink Fit Kennametal Shrink Fit The Concept Heat shrinking is not a new process in the machine tool industry. However, the concept was only recently implemented as a quick-change toolholding mechanism for clamping cylindrical cutting tools for high-speed machining applications. The Shrink Fit process begins by applying a quick and precise heat to the holding end of a toolholder. This causes the internal bore, which is slightly smaller than the shank of a cutting tool, to expand, allowing a tool to be inserted. As the toolholder cools, the bore shrinks to create 360° of uniform pressure along the entire length of the bore, resulting in an evenly distributed clamping force that mechanical toolholding cannot beat. Due to the design, flatted-style, Weldon , and Whistle Notch cutting tool shanks can employ Shrink Fit technology. To gain full benefits of the technology, fully cylindrical tool shanks are recommended. As long as the heating processes are kept within the elastic range of the toolholder material, this clamping operation can be repeated for several thousand cycles. Shrink Fit Tooling Advantages: Low runout cutting tools are gripped 360° along the entire length of the cutting tool shank for an evenly distributed clamping force. Clamping forces are greater than collets or hydraulic chucks. During testing, tool material properties break down and shear before slippage occurs. Slim and short toolholder profile designs are achievable because no moving parts are used. Well suited for high-speed operations because their symmetry provides the best possible balance. Sealing stop screws are not required designed interference between the cutting tool and toolholder forms a seal that enables coolant to flow only through designated passages. These advantages enable Shrink Fit technology to work at greater speeds and feeds, produce better finishes, deliver increased tool and spindle life, and generate more productivity. M78 Kennametal