Sharpening specialist Vollmer used last month’s EMO exhibition in Hanover to present automated grinding, eroding and laser machines for manufacturing tools made of ultra-hard cutting materials such as PCD, CBN and carbide.

This year’s product highlight on the Vollmer stand was the VHybrid 260, which can grind and erode tools up to 100% in a single set-up. The VHybrid 260 features multi-level machining realised via two vertically arranged spindles, where the lower spindle is for both grinding and EDM. With the new V@dison booster solution, the VHybrid 260 achieves a surface quality of up to 0.05 µm Ra when eroding PCD tools.

Thanks to the digital application, it is possible to integrate EDMinto tool production as a complete manufacturing process. According to Vollmer, with the Vpulse EDM generator, users can even producemicro-tools with diameters of 0.5mm and smaller with high precision, performance and surface quality. High accuracy is deliverable via the integrated ‘Laser Check’ measuring system, which achieves required tolerances of ±2µm in fully automatic closed-loop machining.

Also in spotlight at EMO was the Vollmer VGrind 360S tool grinder, which again features the concept of multi-level machining. At the show, Vollmer focused on the machining of CBN tools and how tool manufacturers can use the machine to configure and equip their production, regardless of whether they manufacture special tools or produce tools in high volumes.

Using appropriate automation such as the new HP 170 pallet magazine, the HPR 250 free-arm robot or HC4 chain magazine, the VGrind 360S is suitable for unmanned machining around the clock. With the HP 170, customers can also opt to integrate optical detection of the cooling channels.
For further information www.vollmer-group.com

With its deephone series, Gehring Technologies offers horizontal honing machines for a wide range of large components. At EMO 2023 in Hanover last month, the company presented new developments and features in this segment that enable the more cost-effective execution of demanding and complex machining processes.

“At this year’s EMO, we wanted to show potential customers that we can offer a complete package for honing large workpieces from a single source with our machines, tools and process know-how,” emphasises Marcell Wardin, director ofsales andmarketing. “This package includes a wide range of precision tube components, including cylinder liners for the hydraulic industry, aircraft landing legs, ingot moulds and even radio masts.”

Gehring has developed the deephone machine series for precisely these applications. Stroke lengths range from 2000 to 10,000 mm, while internal machining is possible up to 1200 mm and external machining up to 300 mm.

“An important feature of these machines is their flexibility,” adds Wardin. Indeed, a three-stage gearbox makes it possible to machine a wide variety of workpieces on one machine. Depending on the size of the workpiece or the removal rate, the power requirement changes. The three-stage gearbox provides the necessary adjustment. Without such a component, it may be necessary to distribute different workpieces among several machines or to re-clamp demanding workpieces. With a complete package from a single source, manufacturers can reduce their investment costs.

Gehring also offers tooling innovations. In principle, all tools are adaptable to the company’s deephone machines. Nevertheless, Gehring has a new DH tool series,a special feature of which is their internal cooling system. The company suggests these tools can cut machining time by 20-30% and reduce the need for coolant.
For further information www.gehring-group.com