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Adjustable vibration damping boring bars

Adjustable vibration damping boring bars

Long tool protrusion lengths present a challenge for internal groove cutting. After all, this can cause problems due to vibration. In addition to a poorer surface finish, these vibrations also result in a shorter tool life. Experienced machinists therefore choose vibration-damping boring bars for unfavorable length-to-diameter ratios. These enable low-vibration machining, but can still produce an upward movement during certain machining operations. The Paul Horn GmbH has now addressed exactly that problem and is presenting a boring bar at the EMO in Hanover that can be adjusted to vibration amplitudes. The precise adjustment of the damping element in the boring bar enables a vibration-free grooving process. This results in a better surface finish and a longer tool life.

The damper consists of a carbide rod constructed of O-rings. Its precise adjustment is made via an adjustment screw on the outside. In the process, the preload of the O-rings is adjusted. In this way, the boring bar can be precisely adjusted to the vibrations encountered in each specific application. Horn supplies the tools in a length-to-diameter ratio of 5x- and 8x-diameter as standard from stock, but larger ratios are also available on request as special tools. For groove machining, Horn presents the double-sided groove system type S224. The BK224 cassette system ensures a stable interface between boring bar and cutting plate. These boring bars are equipped with an internal coolant supply to further increase process reliability.

Bohrstange Group

Horn at EMO 2023 in Hannover

From September 18 to 23, the Paul Horn GmbH will participate in the EMO in Hanover. Visitors can visit stand A54 in Hall 5, an area covering 580 m². In addition to other innovations and extensions of the product range, numerous precision tools will also be demonstrated. The tools and processes will be in the spotlight, but of course the Horn team will also be there to welcome visitors. Advising and supporting - at the customer's premises or on an exhibition stand - is part of the tool specialist's philosophy. "We are convinced that the best solution for machining always comes about in close consultation with our customers. At the EMO in Hannover, customers and interested parties can come to us with their current projects, topics and challenges," concludes Markus Horn. "As a manufacturer of precision tools, we must not only master the cutting edges, but also the entire process up to the material."

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