Continuity in the kinematics - Refined and optimized in the details.
The NEXT model is the latest result of more than 30 years of experience in the grinding field for boring, milling and gear cutting tools. A high precision tool grinding machine with 5 or 6 axes and 4 or 5 spindles.
Speed, accuracy, repeatability, compactness, and reliability are the main attributes of the NEXT model.
Due to exceptionally short setup time, this machine is suitable to produce small batches. But even with large quantities or long cycle time, a constant high quality in the µm range is guaranteed.
Tools with a diameter of 0.02 to 14 mm can be produced with the machine in perfect quality. Resharpening of tools up to Ø 25 mm is possible without any challenges.
|Linear axes||Longitudinal travel (X axis)||290 mm|
|Cross travel (Y axis)||250 mm|
|Vertical travel (Z axis)||155 mm|
|Swivel axes||Swivel range of the workpiece spindle (V axis)||270 °|
|Swivel range of the turret (W axis) Option||+/-15°|
|Rotary axes||Rotational Range of Workhead (U axis)||infinite|
|Rotary Speed (U Axis) for cylindrical grinding||0 - 1,500 RPM|
|Feed rates||Linear axes (X, Y, Z axes)||6 m/min|
|Swivel of Tool Spindle (V axis)||36,000 °/min|
|Rotary speed of U axis as a positioning axis||72,000 °/min|
|Minimum Positioning Increment||Linear axes (X, Y, Z axes)||0,0001 mm|
|Rotary Axes (U, V)||0,0001°|
|Measuring systems||Resolution Linear Axes (X, Y, Z axes)||0,01 µ|
|Accuracy Swivel Axis (V axis)||+/- 2"|
|Accuracy Rotary Axis (U axis)||+/- 20"|
|Turret and wheel grinding spindles||Number of grinding wheel spindles (HSK C32)||4 (optional 5)|
|Nominal power grinding motor (Pn-S1)||10.0 kW (13.4 HP)|
|Programmable Speed of Grinding Spindles||up to 12,000 RPM|
|Number of possible wheels per spindle||1 – 3|
|Positioning time of turret||2 sec.|
|High frequency spindles||60/100/150,000 RPM|
|Tool clamping||Clamping systems||W25, W20, B15 Hydraulic Collet|
|Clamping diameter range||1 – 25,4 mm|
|Clamping length||up to 250 mm|
|Optional clamping systems||upon request|
|Application technology||Grinding from solid material||Ø 0,02 – 14 mm|
|Resharpening||Ø 3 – 25 mm|
|Grinding length||max. 150 mm|
|CNC control||Dimensions of Machine||200 x 200 x 218 cm|
|Weight approx.||3,500 kg|
Due to the new assembly of the loading unit, the footprint is now square and is 4m2(43 ft2) only.
The Next consists of two axis groups, grinding unit and workpiece carrier mounted on an extremely rigid cast iron plate. To prevent external vibrations in the working area, the cast iron plate is mounted to the machine bed with special vibration dampeners.
The Y axis on the grinding table allows the grinding wheels to move. The U, V, X and Z axes on the tool carrier controls the movement of the workpieces. The U axis workpiece spindle can be used both as a positioning axis and as a cylindrical grinding axis.
This kinematics allows the grinding of the workpieces from above and from below. The machine beds are supplied with tempered oil for the purpose of reducing the heat transfer.
The heart of the machine is the grinding wheel turret with 4 (or 5) spindles. Each spindle can be equipped with up to 3 wheels. This gives the machine significant advantages:
As a result, the tools can be completely ground in one setup with maximum precision. The linear axes with the unique drives, the combination of hydrodynamic lubrication and a calibrated preload also guarantee an absolute high repeatability, as well as backlash-free movements.
Dynamics: The proven TTB drive concept with calibrated preload and hydrodynamically lubricated axes has been further optimized in the Next model. By doubling the rapid traverse feed rate and the newly developed swivel axis with direct drive, the productivity of the machine has been further improved.
The U-axis is configured with an indirect drive system, or as an optional direct-drive motor.
PM system: Integrated temperature and vibration sensors provide a precise overview of the current condition of the machine at all times. A new concept of energy management reduces unwanted heat. This significantly improves the stabilization time for the machine to reach its operating temperature. Predictive maintenance can be easily controlled using the data from the WebVisu.
HP transmission: The new power transmission concept provides the spindle more power and less vibration. As a result, tools up to 14 mm in diameter can be produced without any difficulties.
The exchange of the modular components takes place quickly and easily.
The workpiece probe is part of the standard equipment.
The grinding wheels can be trued, dressed and measured while in the machine.
A variety of workpiece spindles, clamping systems, grinding spindles and grinding wheel adapters are available for the NEXT. This means that the NEXT can be individually configured and optimally adapted to fit the Customer’s needs.
Loader with short cycle time and a high capacity
Thanks to the newly developed loader, the automatic loading time has been extremely improved. Speed is further achieved by use of a new double gripper that clamps round shafts from 1 to 16mm without the changing of gripper fingers.
The standard version of the loader has 2 pallets for ∅1-16 mm. Optionally,
3 or 4 pallets is possible. Depending on the shank diameter, the pallets can hold up to 814 tools. Specific solutions such as special pallets or special loading operations can be provided upon request.
The fully automatic steady rest is designed for tools having grind lengths in the range of 10x to 15x of the diameter. The radial mounting position of the steady rest can be adjusted in 15° increments; thus, the steady rest can be used either above or below the tool (see illustrations).
Assembly and set-up of the steady rest are achieved quickly, by a simple procedure and with fewer steps. The support prisms and bushings are clamped by a quick clamping system and can be aligned with the tool taper.
The shaft guide optimizes the concentricity of the tools by guiding the shaft on a v-block with a counter-holder. The counter-holder can be mounted on the left or right and is equipped with a v-block so that the blank rotates symmetrically.
The removable tailstock is used in the manufacture and regrinding of hobs, hob cutters and reamers.
The high-precision ball cages extremely accelerate the alignment of the tailstock. The tailstock can also be used with the automatic loading of such tools. The clamping pressure can be precisely adjusted.
6th Axis (Tilting of the Grinding Wheels)
The W-axis (also called 6th axis) can tilt the grinding wheel turret in the
range of +/-15° degrees with maximum precision. For the manufacturing of hobs, this sets the
angle of attack of the grinding wheel to the pitch angle of the cutter.
The axis is equipped with a brake and a high-precision encoder.
The grinding of ballnose cutters with 6th axis is also possible.
Turret with 4 or 5 grinding spindles
The turret can be supplied with both 4 and 5 (option) spindle positions. Short or long spindles with steel or ceramic bearings can be used, depending on the grinding operation. The exchange can take place in less than two minutes.
High frequency spindle
The high frequency spindle is used for the grinding of pockets of inserts and for grinding with small diameter wheels. The HF spindle is mounted in one of the spindle turret positions.
The turret can be equipped with up to 4 HF spindles. TTB can also supply pneumatic HF spindles of 60,000, 100,000 and 150,000 RPM. The conversion from a standard to an HF spindle or vice versa takes place in under 3 minutes!
IC Detect (Internal Coolant Hole Detection)
This high-resolution camera unit is used to locate the indexing position of coolant hole channels in blanks.
This system is integrated in the loading unit; the necessary measurements occur separately from the tool grinding process.
The smallest hole diameter which can be reliably detected is Ø 0.05 mm (tool diameter max Ø 6 mm).
Several variations are available for integrating the NEXT machine into an Industry 4.0 system. TTB creates the optimal solution together with the Customer.
Additional units for dressing, cutting, ejecting, turning, etc. are also available. This allows tools such as cutting knives, turning and grooving tools, indexed tools, punches, flow drills to be produced efficiently and precisely.
Numrotoplus® programming system
NUMROTOplus® has optimal and efficient programming and support functions and includes powerful 3D simulation and precise collision monitoring. Company-specific technology databases can also be created. This enables optimal adaptation to a wide range of production strategies and the best utilization of customer-specific programming and operating know-how. Software updates are available free of charge for the entire service life of the machines.
TTB supplies peripherals, accessories and special units upon request:
The following tools can be ground or resharpened on the NEXT model:
The machine NEXT is used in following industries: