Advanced Turning Solutions for Multidirectional and Internal Machining

The AddMultiTurn series is a multidirectional turning system designed to perform external and internal diameter turning, end-face machining, and high-feed back turning using a single tool. By integrating high-rigidity clamping with advanced chip control, this technology addresses stability and chip evacuation challenges in medium to large workpiece production.

Enhancing Stability through Low Cutting Resistance
In conventional high-feed turning, increased cutting resistance often leads to vibration or "chatter," which compromises surface finish and accelerates tool wear. Tungaloy has introduced the TLM and TLF chip breakers to mitigate these mechanical stresses. These newly developed geometries reduce cutting resistance by more than 20% compared to standard configurations.

This reduction in force allows for stable machining even under aggressive feed conditions, minimizing the stress applied to both the workpiece and the machine spindle. For stainless steel applications, the AH6225 grade has been designated as the primary recommendation, providing a balanced ratio of wear resistance and fracture toughness to ensure consistent tool life across varying metallurgical conditions.

High-Efficiency Internal Machining
How can internal turning achieve the same efficiency as external operations? The expansion includes new round-shank holders specifically engineered for internal diameters. These holders utilize an integrated internal coolant supply mechanism that delivers fluid to the cutting edge four times more effectively than traditional external delivery systems.

In a technical use case involving internal roughing of steel rings (SCr420/20Cr4), the use of these internal holders facilitated a 57% reduction in total machining time. The system supports internal machining up to a length-to-diameter (L/D) ratio of 3. By maintaining high-pressure coolant at the point of contact, the tool ensures continuous chip evacuation, which is critical in preventing catastrophic tool failure during deep-hole back turning.

Technical Performance Metrics
Comparative testing between AddMultiTurn components and standard ISO-regulated inserts demonstrates measurable gains in industrial throughput. In the machining of SUS304 stainless steel billets at a cutting speed of 180 m/min and a feed rate of 0.6 mm/rev, the TLM chip breaker achieved a two-fold increase in tool life. Furthermore, when applied to high-feed back turning, the configuration reduced total machining time by 67% over conventional methods.

The high-rigidity clamping mechanism employed across the series ensures that the insert remains secure during the rapid directional changes required for contouring and back turning. This mechanical stability, combined with the performance of the T9225 and AH6225 grades, allows manufacturers to consolidate tool carousels by replacing multiple ISO tools with a single multidirectional solution.

Edited by Evgeny Churilov, Induportals Media - Adapted by AI.

www.tungaloy.com