Cutting tool manufacturers have always had the inconvenience of producing solid carbide and PCD cutting tools on two separate machines. Now, however, Vollmer has eradicated this issue with its flexible new VHybrid 260 solution that can grind carbide tools and erode PCD tools on a single platform.

Importantly, the VHybrid 260 allows users to switch between grinding and erosion processes in next to no time. Utilising Vollmer’s multi-layered machining technology, the vertical alignment of two spindles is a novel arrangement that allows the grinding and electrode wheelsets to pivot the C axis precisely, ensuring operators always achieve optimal results. If the tool requires both grinding and erosion, the VHybrid 260 can create one complete and efficient machining process for all tool production requirements.

The multi-layered spindle configuration allows the grinding of carbide tools with diameters of up to 150 mm on the top spindle, whereas the bottom spindle can accommodate both grinding and erosion. This design enables the machining of carbide or PCD tools up to a diameter of 150 mm thanks to the high-performance and finely tuned Vpulse EDM erosion generator. The generator delivers surface finishes to roughness of 0.1 μRa, while electrode calibration and wear control combines with a dressing device to provide fully automated processing.

Vollmer says that quality is built into every facet of the VHybrid 260, demonstrated by the company’s ‘wall concept’, which provides high rigidity and vibration damping through its concrete polymer foundation. This is complemented by spindle and motor cooling technology that creates thermal stability, while the vertical spindle configuration eradicates issues related to fixing and floating bearings.

For further information
www.vollmer-group.com

As part of the Volz Group, Volz Engineering Ltd has ambitious growth plans. The Rochdale-based company has recently invested in a new CMM, two three-axis machining centres, a turning centre and, most recently, a Mitsubishi MV2400S wire EDM machine from the Engineering Technology Group (ETG).

Volz Group produces HVAC filters for commercial and industrial applications, and manufactures the machinery for producing the filters and associated components like filter frames and clips.

Managing director Alan Reeson says: “EDM is an integral part of our business as it services both the press tool and automated machinery departments. The outstanding service and support ETG provided for our previous 25-year-old Mitsubishi machine was why didn’t need to look elsewhere for a new machine.”

The new MV2400S provides a “night and day” contrast to the company’s previous wire EDM machine.

“First and foremost, the new Mitsubishi can run lights out giving us 24/7 production,” says Reeson. “We currently run one shift, but the facility to set the machine up to run unmanned overnight is a huge advantage. This is credit to the wire having the facility to re-thread and re-position itself automatically and continue working, so the machine doesn’t lose production hours if the wire breaks. Additionally, the set-up time is 60% faster on the new Mitsubishi MV2400S than the previous machine. We are now setting up and running jobs in less than one hour. More impressive is that as part of the training programme from ETG, the ETG engineer ran through ways to set up existing jobs differently to how our shop floor staff have previously done things. As we do a lot of repeat work, this further improves our processes, productivity and throughput.”

For further information
www.engtechgroup.com

For manufacturers that need to produce holes and features in challenging materials and components, EDM drilling is often the only feasible solution when precision and workpiece integrity is critical. The Engineering Technology Group (ETG) is introducing the Winbro HSD6-GT high-speed EDM drilling system to accommodate such exacting demands on large components.

Winbro’s HSD6-GT has been developed from the original Winbro HSD6 platform to take advantage of the latest design, control and process concepts employed in high-speed EDM for large annular components with a weight capacity of up to 500 kg. To accommodate heavy-duty parts, the Winbro HSD6-GT provides travels of 1050 x 540 x 720 mm in the X, Y and Z linear axes. To enable single-set up and drilling on all faces of the component, the machine also has a rotary A axis of +210°/-60°, a B axis of +100°/-200° and a continuous C axis.

The next-generation Winbro HSD6-GT demonstrates linear and rotary accuracy of 0.015 mm and 0.007° respectively, while linear repeatability is 0.01 mm and rotary repeatability is 0.003°. This level of precision is courtesy of several integrated innovations, such as the patented six-point probing system and optical on-machine inspection.

The six-point probing system ensures accurate positioning of the component before drilling and allows precision positioning using simple fixtures. Complementing this feature is a laser opticator that provides complete optical on-machine inspection to guarantee accurate hole positioning. Whilst the laser opticator and six-point probing system underpins the precision performance of the Winbro HSD6-GT, the integrated signature analysis system monitors drilling performance in real-time to reduce the requirement for manual inspection.

Winbro’s HSD6-GT can create holes from 0.3 to 25 mm diameter, and up to 100 mm deep.

For further information
www.engtechgroup.com

Even with its precision and high-quality results, EDM can – and often does – come with its problems. Until recently, solutions to such issues have been difficult to come by. However, with the help of magnetic technology, many problems can be overcome, increasing machine efficiency significantly.

Properly filtered dielectric fluid is instrumental in producing highly accurate and high-quality machined parts, and is essential for transferring the charge during the process, flushing particles out of the gap between the workpiece to prevent them from forming bridges that cause a short circuit.

By using a magnetic filter in conjunction with the traditional paper barrier filter, fluids benefit from the highest level of protection. Using a paper filter alone can allow particles smaller than the pore of the filter to flow through, leaving the fluid susceptible to secondary sparking. By introducing magnetic technology, it is possible to quickly and safely remove these particles, ensuring the removal of virtually all contamination.

The Micromag magnetic filter, designed and manufactured by Eclipse Magnetics, provides a way of solving many problems that occur during the EDM process. Its high-intensity collection capabilities, coupled with its high-strength magnetic core and an optimised fluid flow orientation, work to remove almost all ferrous particles from the dielectric fluid. Cleaner fluids lead to marked improvements in secondary sparking, significantly less wire breakages, increased machine productivity and longer tool life.

According to Eclipse Magnetics, Micromag provides a rapid return on investment – often within just weeks – and, with its easy-clean design, the collected swarf can be quickly and efficiently disposed of and recycled, reducing the need for high-cost consumables.

For further information
www.eclipsemagnetics.com