STARK.spheric
Clamping without deformation
In a world where every micrometer counts and manufacturing processes are becoming increasingly complex, STARK.spheric sets new standards in intelligent clamping. The system combines uncompromising zero point accuracy with an innovative equaliser mechanism – for absolute precision.
Special features of the STARK.spheric:
- Fast: tension-free clamping between operations
- Flexible: pendulum compensation up to ±5 °
- Compensating: length compensation up to ±1.5 mm
- Raised design: optimum accessibility
- Stable: best suited for large devices
Benefits & Advantages
Clamping without deformation
- No stress on the workpiece
- Better processing results
- Precise repeat accuracy
Stability & Flexibility
- Stable for processing
- Flexible for changing construction geometries
- Highest process reliability
Accessibility
- Height gain for better accessibility in clamping situations
- Trouble-free processing procedure
Design STARK.spheric
Equaliser mechanism
STARK.spheric takes the equaliser options of a zero point clamping system to a whole new level. This system enables angle equalisation while ensuring a highly accurate zero point, thereby guaranteeing process reliability.
- Equalisation of component distortion through high machining rates
- Equalisation of angular errors
Zero point and axis alignment are retained and are always known. In total, up to ±1.5 mm can be equalised. During pendulum motion, the height in Z remains constant.
Pendulum compensation
- Equalisation of angles up to ±5 ° in one direction
- Equalisation of angles up to ±5 ° in all directions
Length compensation
- Displacement in one direction ±1.5 mm with equaliser (AG)
- Displacement in all directions ±1.5 mm without centring (OZ)
STARK.spheric Application example – Aviation industry
Fast clamping without distortion between operations
In the aviation industry, structural components must meet the highest standards of dimensional accuracy, surface quality and strength. The machining volume is extremely high, especially for large-format workpieces such as fuselage sections, wing components or frames – often up to 90 % of the material is removed in order to achieve a lightweight and stable structure. This removal of material inevitably releases internal stresses. During machining, the clamping fixture stabilises the workpiece, but after release, these stresses can be released and cause distortion. However, specialised clamping solutions are required to ensure dimensional accuracy and functional safety:
- Even force distribution
- High rigidity of the fixture
- Defined relief between processing steps
- Consideration of thermal and mechanical influences
This ensures that the workpiece remains precise, stable and functional even after machining.
STARK.spheric Application example – 2x clamping
The STARK.spheric can be used for clamping, for example, support structures with two clamping points. The zero point element allows angular errors of up to ±5 ° to be compensated for in the direction of the second clamping element only. This, in turn, can compensate for angles in all directions and also length compensation of ±1.5 mm in the clamping direction. This ensures that the reference point can be clamped without tension and in a process-reliable manner despite deformation.
Clamping concept
- Carrier set-up with two STARK.spheric units
- Equalisation of distorted or curved surfaces for tension-free clamping of components
- Relieving tension in the component between two machining steps without losing the zero point by separately releasing the equalisation
STARK.spheric Application example - 3x clamping
In the example of a classic three-point support, the zero point element determines the absolute position, but can still compensate for an angular error of up to ±5 ° in all directions. The clamping element with compensation also compensates for angles of up to ±5 ° in all directions and additionally for a displacement in one direction of ±1.5 mm. The STARK.spheric without centring allows for angular compensation and a displacement of ±1.5 mm in all directions.
Clamping concept:
- Set-up of flat components with three STARK.spheric units
- Relieving tension in the component between two machining steps without losing the zero point by separately releasing the equalisation
Detailed information on the STARK.classic product family can be found in the catalogue download:
