Studer to exhibit grinding machines at EMO 2009

Studer is to showcase advanced grinding machines at EMO 2009, which will take place in Milan on 5-10 October.

According to the company, which will be found in Hall 6, Stand G02, the S33 universal cylindrical grinding machine has proven itself for both single-part and large series-production runs.

Now, even more workpiece geometries can be ground in a single clamping.

This development of the tried-and-tested S33 brings important advantages for customers in tool making, job shops and the supply industry.

It is made possible by a new grinding head with two motor spindles for external grinding and an internal grinding unit.

Three grinding wheels ensure that the workpiece can be machined even more individually and quickly.

The S33 is now available with CNC control and an integrated PC.

This enables the use of the new Studerwin operator interface.

The Studergrind programming software modules can now be installed directly on the control system.

The S33 features: a unique arrangement of the motor spindles; simple changeover from grinding between centres to live spindle grinding; a swivelling machine table; an optional C axis for form and thread grinding; a Granitan machine bed; and a selection of options and accessories.

The S22 is the production platform for the individual grinding solution.

The customer's workpiece is the focal point.

Any workpiece can be machined on the S22 using a variety of technologies, such as conventional cylindrical grinding in the production environment, form and thread grinding, high-speed grinding (HSG) with cutting speeds between 80m/s and 140m/s or heavy-duty applications with 160mm-wide grinding wheels.

The X and Z axis are designed as cross slides.

The workpiece table is permanently bolted to the machine and the machine bed is made of Granitan.

The large distance between the guideways and the sturdy machine base ensure excellent stability of this machine concept.

Highly dynamic axis drives, high-quality Studer guideway systems, short reaction times and optimised travel provide the basis for high dynamics and precision.

Pre-tensioned hydrostatics with linear motor or anti-friction guideways with ball-type linear drives are available in the X cross slide.

Available in the Z longitudinal slide are hydrostatics with linear motors or guides with patented surface structures (ribbed structures) and ball-type linear drives.

Thanks to the modular design, the S22 can be configured with almost all existing subassemblies (workhead, wheelhead, tailstock, measuring system and dressing, for instance).

The broad selection is intended to meet every possible requirement: chuck or universal workhead; standard or high-precision C axis (position and speed controlled for form and thread grinding); belt or motor spindle wheelhead; standard, synchronous or fine grinding tailstock; or dressing from the rear with a variety of devices.

An integrated system for measuring during the grinding process, re-measurement, recording, evaluation and trend correction guarantees comprehensive quality control.

For high-speed grinding, a B axis is available with two grinding spindles in the versions left/left or right/left for 400 wheels in the cutting speed range between 80m/s and 140m/s.

Heavy-duty applications with a 160mm-wide grinding wheel are also possible.

The CT960, meanwhile, is said to be the all-rounder for internal and radius grinding.

The high-end universal internal cylindrical grinding machine, with a B-axis swivelling to 91 degrees and four spindle turrets, is suitable for general grinding tasks and particularly for grinding complex workpieces from very hard materials (tungsten carbide, ceramic or sapphire).

The optimal stability and rigidity of the machine enable the finish grinding of workpieces in a polished surface quality.

In the case of dies with open geometries, radii and tapers can be ground with the interpolating B axis.

For dies and moulds with a closed geometry, the traditional method of path contour grinding is used.

Thanks to the HMI-SimCT programming and simulation software, programming and setup times for complex workpieces can be reduced to a minimum.

The grinding process can be simulated and optimised before machining on the machine control or offline on an external PC.

In addition to the four grinding spindles, a measuring probe can also be used for measuring and positioning tasks.

The hydraulically swivelling dressing spindle, which is equipped with an NCC diamond disc, enables the precise dressing of ceramic-bonded diamond grinding wheels.

This technology guarantees that the wheel radius always remains constant during the fine grinding process.

For grinding high-precision threads, such as for thread ring gauges, two of the four grinding spindles can be set to the pitch angle by means of two independent, manually activated swivel axes.

For the internal grinding of thread ring gauges, the CT960 is equipped with three dressing units: one diamond dressing roll with a multi-tooth profile (swivelled at pitch angle), two PCD dressing plates for a single-tooth profile and two multi-point diamonds for diameter and straight dressing.

The CT450L, meanwhile, is described as the optimal machine for low costs per part.

This entry model represents a good-value internal grinding solution with a broad application range; it is used for general internal grinding applications, grinding spring collets or for machining brittle materials.

It is capable of simple grinding tasks such as bores, surfaces and tapers through to complex contours and it has a very compact design and a small footprint.

The setup ergonomics, part loading and measurement are exemplary, thanks to the special machine concept of fixed grinding spindles and moveable workhead on a generously dimensioned cross slide.

The special features also include the linear spindle arrangement and the use of one or two belt spindles with speeds of 28,000rev/min to 60,000rev/min.

The C450, the practical machine for specific grinding solutions, offers even further expansion options in comparison to the C450L; the grinding spindle configuration and the number of grinding spindles can be optimally designed to meet all customer requirements.

A cost-effective solution for automated grinding can be achieved with the optional, fully integrated handling for loading and unloading.

Threaded nuts can also be ground using the optional C axis.