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Reduce Vibration in Long-Overhang Milling

Sandvik Coromant has introduced the lightweight CoroMill 390, which features a cutter body produced using additive manufacturing (AM). The lighter overall weight of the tool helps to minimize vibration and improve security during machining with long overhangs. In turn, productivity is also increased.

"AM offers a superior way of producing complex structures with high precision and without joints," said a company spokesperson. "Use of the process can make components lighter, stronger and more flexible than ever before. With regard to tool bodies, AM allows for the generation of shapes and features not possible with metalcutting. Additionally, virtually any material can be printed, as in this case, a titanium alloy."

"When designing our new lightweight CoroMill 390, material has been tactically removed to create the optimal cutter design for minimizing mass," explained Thomas Wikgren, Manager Product Application Management, Sandvik Coromant. "This is called topological optimization, and it makes the cutter more compact and significantly lighter than a conventional version, thus helping machine shops to boost the productivity of their long-overhang milling operations. Moreover, a shorter distance between the damper in the adapter and the cutting edge improves performance and process security."

"Process security is paramount in a number of metalcutting applications, not least when milling with long overhangs, which is a common requirement in components used by the aerospace and oil and gas sectors," said the spokesperson. "Here, the generation of features such as deep cavities can be compromised by vibration, leading to slower production, shorter tool life and poor surface finish. The lightweight CoroMill 390 provides the solution. Combined with Silent Tools milling adapters, this optimized tooling combination subdues vibration to help maximize productivity and process security in demanding applications involving long overhangs. In addition, the inherent CoroMill 390 concept delivers light cutting action for smooth cutting performance."

Lightweight CoroMill 390 can perform long-reach face milling, deep shoulder and side milling, cavity milling and slot milling. The tool is available in 40 mm (arbor 16 coupling) and 50 mm (arbor 22 coupling) diameter variants. Three or four inserts (size 11) can be specified to suit the application. Differential pitch and internal coolant are provided on all cutters.

For more information contact:

Sandvik Coromant

1702 Nevins Road

P.O. Box 428

Fair Lawn, NJ 07410-0428

800-SANDVIK / 201-794-5000

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