The Journal of Industry and Technology

Industrial Analytical Instrumentation

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Machine tools and general engineering

Vollmer supplies Ceratizit Group Company
with new Vgrind Tool Grinding Machine

Günther Wirth (GW) is a manufacturer of PCD, solid carbide cutting tools and special tools for international manufacturing industry with its fleet of over 100 machine tools. For machining its ultra-precise special tools, the company depends upon sharpening specialist Vollmer and its QWD wire erosion machines and Vgrind 160 grinding machine for solid carbide tools.

Founded in 1981, GW has a factory in Balzheim, Germany, a production site in France and a branch in India, producing cutting tools around the clock with Vollmer technology. The business, which has been majority-owned by the Ceratizit Group since 2012, currently has around 450 employees and is one of the leading manufacturers of drills, milling cutters and reamers.
 
Each day, 12,000 tools leave the production site to service international customers in the aerospace, medical technology and turbine/mechanical engineering industries. "For over 35 years, we have been developing cutting tools from solid carbide and PCD. Our product range currently comprises around 20,000 different standard tools. We are able to achieve this thanks to our state-of-the-art machine fleet, which we intend to expand further still," says Gerhard Bailom, CEO of Günther Wirth Betriebs-GmbH.

Since 1999, Günther Wirth has been using Vollmer's QWD eroding machines to manufacture PCD tools. Thanks to the contactless eroding process, the PCD can be removed precisely and the tool geometries can be individually adapted to customer requirements. The eroding wire also enables GW to achieve precise sharpening of complex tool geometries with minimal inside radii, such as that seen in multi-stage tools.
 
"We see our tools as being clearly positioned in the high-performance segment, and the requirements of our sharpening and machine tools are equally high. Vollmer is a partner with solutions that represent the same quality and sustainability values as us - both in the terms of machine quality and the service it provides. As we both have our headquarters in Upper Swabia, we also value the personal, intensive dialogue with each other." Bailom

The tool manufacturer has recently added the new Vollmer Vgrind 160 to its grinding machine fleet. The Vgrind is used for the development and production of solid carbide special tools. Equipped with an automated solution, the machine allows round the clock production.

New kinematics with two vertically positioned spindles guarantee the precision and dimensional accuracy of the Vgrind 160, enabling multi-level machining. For GW, this means the workpieces can be ground at the optimal pivot point of the C-axis on both grinding spindles. This spindle positioning solves the common problems related to fixed and floating bearings that lead to more precise results when machining solid carbide tools.
 
Another plus factor for GW, is the Vgrind 160's control system that is based on the NUMROTO plus software. Incorporated into the machine is the HP160 pallet magazine that enables automatic tool grinding around the clock. The magazine can hold up to 272 workpieces and it automatically feeds tools into the Vgrind 160. The machine is manned by two day time shifts and a night shift that ensure optimal productivity. In fact, the company has just bought an additional two Vgrind machines.
 
Commenting upon this customer, Dr.-Ing. Stefan Brand, CEO of the Vollmer Group says: "At all GW sites, production is carried out in accordance with the continuously high standards. The company's machine fleet allows us to ensure that production in India is carried out with the same quality, precision and delivery times as in Germany. And thanks to Vollmer sites in Germany and India, we are always on hand when it comes to the performance of our grinding and eroding machines."

To find out how Vollmer can take your cutting tool and circular saw blade production to the next level, view website: www.vollmer-group.com

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