|
|
 |
|
|
In Focus - Archive June 2008
|
| |
|
|
|
Polygon clamping technology is a well-tried and effective method for precise tool clamping
|
 |
The versatile polygon clamping technology range from SCHUNK
|
|
|
06-01-2008 -
The principle behind polygon clamping is surprisingly simple. The know-how that makes it work is however highly advanced. For more than ten years, polygon clamping technology has enriched the market for precision toolholders with new ideas. The idea of taking advantage of the permanently elastic property of steel for tool clamping purposes has over time led to a comprehensive programme of high-precision tool clamping devices. Today, polygon clamping technology is applied from micro-cutting to rough machining. Users benefit from a number of outstanding properties: consistent high run-out accuracy and precise length adjustment ensure unrivalled machining results. The system is virtually wear-free and requires no maintenance. The steel of the toolholder is not exposed to any thermal stress that could lead to a loss in precision over time. Toolholders with polygon clamping technology dampen vibration and thus produce extraordinarily smooth surfaces and long tool service lives. They cater for high machining rates at maximum speeds and can even be used for tools with diameters of as little as 0.3 mm, offering safe and precise fixture.
|
|
Reliable - even after thousands of tool changes
|
|
Polygon clamping technology is a patented development of SCHUNK, the clamping toolholder specialist based in Lauffen, Germany. Polygon clamping technology products are marketed globally under the brand name TRIBOS. The clamping principle behind the SCHUNK products is very simple yet effective. Instead of a cylindrical bore, the toolholder features a polygon-shaped bore for the insertion of the tool. The clamping device applies a defined pressure onto the outside of the holder. As a result, the permanently elastic section of the bore is pressed to a cylindrical shape. In this process, the steel is exposed to forces that are below the proof stress level of Rp 0.2%, so that there are no structural changes to the steel. The tool can now easily be inserted into the holder. Subsequently, the pressure is released, and the bore returns to its original polygonal shape, whereby the internal stress of the steel holds the tool firmly in its place. Extensive tests have shown that there is no fatigue in the steel, even after thousands of tool changes. With the polygon clamping technology, it takes only about 20 seconds to change the tool.
|
|
High-precision technology
|
 |
|
Virtually wear-free toolholders that require no maintenance – for durable precision.
|
|
|
TRIBOS polygon clamping devices by SCHUNK offer excellent technical properties: The run-out accuracy of all TRIBOS precision toolholders is less than 0.003 mm. All toolholders are fine-balanced with a balance quality of G 2.5 at 25000 rpm. They are suitable for HSC and some of the toolholder types have been successfully tested for speeds of up to 205,000 rpm. The TRIBOS toolholders can be used for all H6 quality tool shafts.
During the clamping process, the toolholder is deformed only radially without elongation of the bore. This ensures that the tool lengths can be adjusted with a tolerance range of as little as 0.01 mm, which is a major advantage over shrink fit chucks where the length is affected by the cooling process. Toolholders with polygon clamping technology do not contain any moving parts. In contrast to collet chucks, there is no wear from mechanical forces, ensuring consistent and reliable clamping without any need for maintenance over a long service life.
|
|
SCHUNK offers suitable polygonal toolholders for any application
|
 |
|
From rough blocks to filigree contours – polygon clamping technology is the ideal solution for a huge range of applications.
|
|
|
Polygon clamping technology can be used for a wide range of applications, as there are virtually no limits to the dimensions of the tool or the clamping diameter. This explains the wide range of application of the technology: TRIBOS toolholders are used in the automotive industry, in tool and mould production as well as in civil engineering and plant manufacture. Among the SCHUNK customers, you find companies in the watch and jewellery industry, manufacturers of technical medical equipment, precision engineering firms, aeronautic companies, wood-professing specialists and companies from many other industries. For many applications, SCHUNK offers a specialised product based on polygon clamping technology.
|
|
Hard shell - damping core
|
 |
|
The TRIBOS-R offers excellent radial stability. Thanks to the hollow chamber inserts, it has great vibration damping properties.
|
|
|
The TRIBOS-R polygon toolholder, featuring a large outer diameter and a chamber system, has been specifically designed for rough machining. Thanks to its rigidity, it caters for high feed rates and high cutting speeds – thus offering real cost savings to users. Vibration-damping inserts in the hollow chambers protect the tool edge, ensuring smooth surface finishes and long tool lives. Operators can thus save even more money, as their tool costs are reduced.
The excellent performance of the TRIBOS-R has also been proven in independent tests. Comparison tests of different toolholders carried out at the HSC-SPANNFUTTER II working group by the German Association for Production Technology and Development in Schmalkalden showed clearly that TRIBOS-R toolholders set the standard as regards natural frequencies, as they have the lowest tendency for vibration.
|
|
Fast and compact
|
|
For precision rough machining at high speeds, we have developed the TRIBOS-RM toolholder. This highly compact toolholder offers excellent radial stability and thus enables users to take full advantage of the capabilities of HSC machining centres. The toolholders are tailor-made to meet the extreme requirements of high-speed cutting, but are equally suitable for use in micro-machining. The TRIBOS-RM can be used for speeds of up to 60,000 rpm. Thanks to its chambered design, it effectively dampens vibration, thus prolonging the service life of your tools. It is available in the sizes HSK-E 25, 32 and 40 as well as in the sealed HSK-A 40 version, which makes it the ideal solution for highly dynamic machining centres. TRIBOS-RM can properly clamp even tools with very small shaft diameters in the 3 to 16 mm range.
|
|
Slim and precise
|
 |
|
Slim and accurate: TRIBOS products cater for machining of areas that are difficult to reach.
|
|
|
Polygon clamping technology is particularly suitable for the machining of areas that are difficult to reach. The TRIBOS-S toolholder is the ideal solution for applications where other toolholders cannot be used due to their size. It is designed for cutting speeds of up to 80,000 rpm, while its low weight makes it suitable for use at high feed rates. Despite its slim design, its run-out and repeat accuracy is below 0.003 mm, ensuring uniform cutting action, excellent machining results, a long tool life and best protection of the spindle.
|
|
A talented helper for use with other toolholders
|
 |
|
The high-precision TRIBOS-SVL extension can be combined with many other toolholders from various manufacturers, providing you with an extremely narrow interfering contour.
|
|
|
Probably the most unusual model of the TRIBOS family is the TRIBOS-SVL tool extension. This extremely slim high-precision extension piece can be combined with all types of toolholders from other manufacturers, which makes it a most versatile piece of equipment. The TRIBOS-SVL can save you real money, as it might do away with expensive special tools. One such highly efficient solution is for example the TRIBOS-SVL combined with a TENDO hydraulic expansion toolholder, bringing together excellent vibration damping with a very small interfering contour. The high-precision extension with a run-out accuracy of less than 0.003 mm is simply clamped like a tool into the chuck. The polygon clamping technology of the TRIBOS-SVL holds the tool firmly and precisely in the desired position, so that you can now properly access even the narrowest and inaccessible area without any extra costs for specialised tools.
When it comes to tool grinding, the dream team made up of a TENDO hydraulic expansion toolholder and the TRIBOS-SVL from SCHUNK is hard to beat: While the hydraulic TENDO tool-grinding toolholder has optimum vibration damping properties, the TRIBOS extension minimises the interfering contour for better access to recessed areas. The accurate run-out of the combined toolholder guarantees precise tool geometry.
|
|
Great when it comes to small tools
|
 |
|
Specialised product for micro-machining.
|
|
|
TRIBOS-Mini sets new standards in the field of micro-machining. This toolholder is designed for tool shafts with H6 tolerance from a diameter of 0.3 mm. Its strengths are particularly appreciated in the fields of medical technology, electrical engineering, watch making, precision engineering and mould production. In many cases, the TRIBOS-Mini is a viable alternative to an expensive specialised tool and thus helps saving costs.
|
|
One clamping device for all toolholders
|
 |
|
The highly affordable user-friendly TRIBOS SVP-2D clamping device allows for quick tool changes.
|
|
|
All TRIBOS polygon toolholders can be operated with a model from the SCHUNK range of cost-effective clamping devices. Even the most basic model can be used for the closing and opening of all TRIBOS toolholders. To change the tool, the necessary pressure is applied to the toolholder. The old tool is now removed and the new one inserted. The clamping device is available in an analog and a digital version. With the digital model, you can program and store up to ten different clamping pressures, to suit your specific toolholders. This saves time and makes the system even safer. Thanks to its state-of-the art hydraulic unit, the digital clamping device allows you to accurately measure and apply the low pressure required for small tool shaft diameters.
|
 |
|
Clamping, measuring, inspecting, adjusting tools - the TRISet does it all. TRISet units can also be used for the accurate measurement of toolholder systems from other providers.
|
|
|
The clamping process is made even easier by using the TRISet high-precision optical tool presetting and measuring device from SCHUNK. Before inserting the new tool, you can accurately measure, inspect and adjust it. The TRISet device can be used in conjunction with any conventional tool clamping system and comes with a built-in digital TRIBOS clamping device. The tool presetting unit allows for micron-precise measuring of the tools, cut inspection for quality and wear assessment purposes. It offers measuring programs for axial and lateral run-out accuracy as well as for greatest cut and largest diameter.
|
|
Conclusion:
|
- Polygon clamping technology is a well-established technology for high-precision tool clamping.
- Thanks to its versatility, it is the ideal basic technology for all precision applications in modern machining and production - covering the entire range from rough to micro-cutting.
- In addition, it offers a range of components that can be combined with other clamping systems for use in specialised applications.
- The technology is wear-free, cost-effective, safe, easy to use and maintenance-free.
- Polygon clamping technology therefore offers machine operators clear advantages as regards quality and costs. Polygon clamping systems pay for themselves in a very short period of time.
- TRIBOS solutions are suitable for all applications, irrespective of the company size or industry. Whether for small enterprises or multinational corporations - TRIBOS toolholders are cost-effective and efficient.
- On request, TRIBOS toolholders can be customised to suit your equipment and application.
|
|
| |
|
| |
|
|
|
| |
|
|
2008-12
Quick jaw change brings flexibility and substantial savings
Flexibility in production is a crucial competitive advantage. Only companies that can respond to demand with flexible yet absolutely precise production can supply their customers rapidly with a constantly increasing variety of products without needing to build up expensive and inefficient stocks.
 more...
|
| |
|
|
2008-11
Pneumatics or mechatronics? … It all depends!
To date, pneumatically driven gripper modules have been used primarily in gripper technology. Recently, however, more and more electric grippers have been coming onto the market. Both competing systems have powerful arguments in their favor.
more...
|
| |
|
|
2008-10
High-Performance-Cutting (HPC)
Hard on the outside, clever on the inside: Toolholder systems developed especially for HPC that have strong rigidity as well as good vibration dampening provide clear benefits for HPC.
more...
|
| |
|
|
2008-09
Cleanroom
The importance and the use of cleanrooms in assembly and handling are constantly increasing.
more...
|
| |
|
|
2008-08
Clamping Force / Torque
We are frequently confronted with torques on a daily basis, even though we do not recognize them as such.
more...
|
| |
|
|
2008-07
Convenient robot or attractively priced spindle gripper?
A significant potential for increasing efficiency in modern machining processes is the automated loading and unloading of the machines.
more...
|
| |
|
|
2008-06
Polygon clamping technology - round pegs in polygonal holes
The principle behind polygon clamping is surprisingly simple. The know-how that makes it work is however highly advanced.
more...
|
| |
|
|
2008-05
Packaging
A package for everything
Packaging is a universal function that is required in practically every industry and meanwhile is so important that it has become a separate industry itself.
more...
|
| |
|
|
2008-04
Magnetic clamping technology has strong attraction
Workpiece clamping with electroermanent magnets reduces set-up times by up to 50 percent and brings about significant advantages especially in the manufacture of large parts.
more...
|
| |
|
|
2008-03
Quick-change systems speed up production
Changing systems for components such as grippers and tools add a high degree of flexibility to production processes
more...
|
| |
|
|
2008-02
Vibration damping
Improves surface quality and reduces wear on the tool and spindle.
more...
|
| |
|
| |
|
|
|
| |
In Focus - 2013
In Focus - Archive 2012
In Focus - Archive 2011
In Focus - Archive 2010
In Focus - Archive 2009
In Focus - Archive 2008
In Focus - Archive 2007
|
|
