Каталог Widia инструментальная оснастка - страница 1092

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Shrink Fit

HEAT

toolholder body O.D. cutting tool shank

HEAT HEAT

clearance zone toolholder I.D.

HEAT

The ConceptShrink Fit Tooling Advantages:
Heat shrinking is not a new process in the machine tool industry. However,• Low runout — cutting tools are gripped 360° along the entire length of the
the concept was only recently implemented as a quick-change toolholdingcutting tool shank for an evenly distributed clamping force.
mechanism for clamping cylindrical cutting tools for high-speed machining
applications.• Clamping forces are greater than collets or hydraulic chucks.
The Shrink Fit process begins by applying a quick and precise heat to the• During testing, tool material properties break down and shear before
holding end of a toolholder. This causes the internal bore, which is slightlyslippage occurs.
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• Slim and short toolholder profile designs are achievable because no moving
along the entire length of the bore, resulting in an evenly distributed clampingparts are used.
force that mechanical toolholding cannot beat.
Due to the design, flatted-style, Weldon• Well suited for high-speed operations because their symmetry provides the
®, and Whistle Notch™ cutting tool shanks
can employ Shrink Fit technology. To gain full benefits of the technology, fullybest possible balance.
cylindrical tool shanks are recommended. As long as the heating processes
are kept within the elastic range of the toolholder material, this clamping• Sealing stop screws are not required — designed interference between the
operation can be repeated for several thousand cycles.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.