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New Method for Turning Complicated Shapes and Pockets with a Single Tool: Y-axis Turning

Sandvik Coromant’s Y-axis turning offers benefits such as reduced cycle time, improved component surface quality and more stable machining.

Posted: March 8, 2023

The CoroPlex HDT Y-axis round insert in action.
An introduction to the CoroPlex y-axis turning tool.
The CoroTurn Prime Y-axis variant in action.
milling spindle axis during turning
An introduction to the CoroPlex y-axis turning tool.

Sandvik Coromant, a cutting tool and tooling system specialist, has introduced a new method for turning complicated shapes and pockets with a single tool: the new all-directional Y-axis turning.

Turning has developed immensely in recent years with new innovations, such as all-directional PrimeTurning™, non-linear turning and interpolation turning. “One could say that these advances, together with progressive capabilities in modern machines and CAM software, have paved the way for the new Y-axis turning method,” says Staffan Lundström, Product Manager, Turning, at Sandvik Coromant. “And with the tools and method now in place, we look forward to exploring the possibilities this method can present to our customers.”

milling spindle axis during turning
The CoroTurn Prime Y-axis variant in action.

So how does Y-axis turning work? As the name implies, the new method makes use of the Y-axis, and all three axes are used simultaneously when machining. The tool rotates around its own center, the insert is placed for machining in the Y-Z plane and the milling spindle axis interpolates during turning. This allows intricate shapes to be machined with a single tool.

Y-axis turning offers numerous benefits. The ability to machine several features with a single tool reduces cycle time, and no tool changes are required, which minimizes the risk of “blend points,” or irregularities between adjacent machined surfaces. The main cutting forces are directed into the machine spindle, thus improving stability and reducing the risk of vibration. A constant entering angle drastically improves chip control and makes it easier to avoid chip jamming.

Two new tools have been developed to support Y-axis turning. The new CoroTurn® Prime variant is suitable for shafts, flanges and components with undercuts. The CoroPlex® YT twin-tool, featuring CoroTurn TR profiling inserts and CoroTurn 107 round inserts with rail interface, can favorably be used for components with pockets and cavities.

To summarize, Y-axis turning is a method for simultaneous three-axis turning with interpolation of the milling spindle axis. The new tools can also be used in “static mode” with a locked spindle for flexible two-axis turning with fast insert indexing. The method is suitable for all materials and requires a multitask machine with options to allow interpolation of the milling spindle axis during turning.”

Sandvik Coromant
Part of global industrial engineering group Sandvik, Sandvik Coromant is at the forefront of manufacturing tools, machining solutions and knowledge that drive industry standards and innovations demanded by the metalworking industry now and into the next industrial era. Educational support, extensive R&D investment and strong customer partnerships ensure the development of machining technologies that change, lead and drive the future of manufacturing. Sandvik Coromant owns over 1,700 patents worldwide, employs over 7,700 staff, and is represented in 150 countries.

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