OKUMA Europe GmbH

06.12.2011

Manageable Deformation - Accurately Controlled

	The Advanced Thermo-Friendly Concept		Thermo-Friendly Concept
Machining dimensional change over time (actual data) Full table range: 5µm* (room temp change: 8ºC)

Eliminate waste with the Thermo-Friendly Concept

In addition to maintaining high dimensional accuracy when room temperature changes, Okuma´s Thermo-Friendly Concept provides high dimensional accuracy during machine startup and machining restart.
To stabilize thermal deformation, warming-up time is shortened and the burden of dimensional correction during machining restart is reduced.

Advanced TAS-C: dimensional accuracy stabilized over full table range

When machining a series of workpieces setup on the work table, dimensional accuracies will vary and prevent efficient production.
TAS-C (Thermo Active Stabilizer – Construction) now includes a function to control table expansion, to provide stable dimensional accuracy no matter where a workpiece is mounted on the table.

New	Table expansion dimension control

*Note: The “actual data” referred to represent examples and may not be obtained due to differences in specifications, tooling and cutting conditions.

High-speed spindle contributes to significantly improved productivity

High-speed spindle

High accuracy, high reliability spindle

High speed, high rigidity spindle can be selected to match machining needs

Die/mould semi-roughing, High quality surface finishing	20,000-minˉ¹ spindle (Std) 15/11 kW (10 min/cont)	HSK-A63 83/54 N-m (5 min/cont)

Die/mould high-speed, high-quality surface finishing	30,000-minˉ¹ spindle (Opt) 15/11 kW (10 min/cont)	HSK-E50, HSK-F63 29/20 N-m (10 min/cont)

High-end general purpose high-speed spindle	15,000-minˉ¹ spindle (Opt) 22/18.5 kW (10 min/cont)	BT-40, HSK-A63 199/146 N-m (10 min/cont)

Rotary shaft cooling to minimize effects of heat on tools

For 20,000-minˉ¹, 30,000- minˉ¹ spindles

The benefits of rotary shaft cooling

Spindle and tool temperature rise is minimal and thermal deformation becomes smaller. In addition, the time required to reach stable deformation boundaries is reduced, thus warmup time can also be shortened. [spindle / tool temperature rise]

Spindle thermal matrix

A “spindle thermal matrix” can be produced by a small-diameter end-mill making linear grooves on a slowly inclining surface.
A spindle´s thermal deformation is reflected in the length of the grooves.
With spindle speed changes and start/stop conjunctions, the machined surface will show evidence of thermal deformation until a stable deformation zone is reached.
Rotary shaft cooling will suppress spindle temperature changes, to reduce thermal deformation, thus shorten the time to reach stable deformation.

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