JUPITER -

Productive all the way

JUPITER series centerless grinding machines offer substantial production benefits: The patented CNC height adjustment of the support blade minimizes tooling times, automatic adjustment of the grinding gap geometry optimizes the grinding process and the inclined bed guarantees maximum dimensional precision. Depending on the application, corundum, CBN or diamond is used as an abrasive.

Highlights

Rapid set-up due to patented CNC height adjustment of the support blade
Minimized undulations with grinding wheel balancing on two planes
Extremely low running noise due to grinding spindle with direct drive
Optimum grinding quality as a result of market-leading rigidity
Optimized grinding process due to automatic grinding gap geometry setting
Individual CNC dressing of grinding wheel and regulating wheel

Grinding process descriptions

During centerless cylindrical grinding, the workpiece is not clamped but lies in the grinding gap between the grinding wheel, regulating wheel and support blade. The grinding pressure presses the workpiece against the regulating wheel, which brakes the workpiece to its own peripheral speed.

For this to work, the friction at the regulating wheel must be greater than the friction at the grinding wheel. The friction is achieved by the rubber bond at the regulating wheel and by inclining the support blade and machine bed.

Throughfeed grinding: Throughfeed grinding is among the most productive methods used in the field of grinding technology. It entails workpieces traveling through the machine in a continuous stream without interruption. The grinding wheel has defined roughing, finishing and ultra-fine grinding zones, enabling it to grind all the workpieces to one diameter. The throughfeed rate is determined by the incline and speed of the regulating wheel.

Plunge-cut grinding: The centerless plunge-cut grinding method entails grinding workpieces with offset or profiled diameters. Here, the grinding wheel is given the negative profile of the desired workpiece contour. In this way, all the diameters which have to be produced at the workpiece can be ground in a single plunge cut operation. The workpieces are positioned, then ground and finally unloaded by means of an axial stop on the support blade.

Inclined plunge-cut grinding is a special process variant of this method. In contrast to the straight arrangement of the grinding wheel axis, the axes of both the workpiece and the regulating wheel are inclined by 15°. This enables shoulders and end faces to be ground, in addition to diameters.

Special solutions

One pass, multiple operations

Rough, intermediate and finish grinding in a single pass: Using the throughfeed grinding method, the JUPITER 500 replaces the rough and intermediate grinding processes by using a special CBN grinding wheel set. This saves the user the need to perform several work processes, increasing output many times over.

Inclined plunge-cut grinding

The JUPITER 200S can be reset within minutes for angular plunge-cut grinding operations. This allows not only diameters but also shoulders and face ends to be ground to a high standard of precision and reproduction accuracy. The JUNKER software tool, the CNC height adjustment of the support blade and the CNC-controlled workpiece stop all help to optimize the grinding process.