A new type of turning insert developed by Tungaloy has excellent performance, excellent cutting control performance, long service life and high productivity.
For turning operations, especially for compact contouring, conventional VNMG indexable inserts with an angle of 35° between the primary and secondary blades do not work in many cases. Tungaloy's new YNMG16 standard indexable inserts feature a 25° angle between the primary and secondary blades, which makes the inserts more slender and avoids scratching the contours of the workpiece around the machining area. The blade can be fixed using a conventional lathe handle.
An example of actual production is the roughing and finishing of a threaded mandrel with a diameter of 60 mm and a material of 15CrMo5. When the thread engagement angle is 34° and the tip radius is 0.5 mm, a depth of cut of 4 mm can be achieved. However, it is difficult to achieve such an effect using a conventional indexing blade, and the user is not satisfied with this, so a special solution needs to be sought. The reason is that a typical VNMG indexable insert does not provide sufficient depth of cut or the thread engagement angle required by the drawing.
Similar processing tasks were not a case, so Tungaloy engineers went deep into the factory to develop a new indexing insert with two Y-shaped structures back to back. Since the angle between the planes of the primary and secondary blades is 25°, which is 10° smaller than that of the conventional blade, it is sharper, so that the desired result can be obtained, and thus a larger processing depth can be obtained. In addition, the angle of attack when machining near the boundary area is different from the past, and unnecessary contact with the parts can be avoided. At the same time, since the base of the blade remains the same, a conventional shank can be used to ensure that the exposed blade holder remains in the center position.
Tool costs can be reduced by 53%
So far, special tools are still required for the V-shaped structure at 34° angle. Tungaloy's new YNMG16 indexable inserts provide a 25° angle between the primary and secondary blades, resulting in greater depth of cut. When T9025 (hard metal) and GT730 (ceramic alloy) are used, the YNMG16 blade formed at an acute angle of 25° has a tip radius of 0.8 to 1.2 mm (including coating). The ZF type chip breaker can be used for finishing, and the ZM type chip breaker can be used for machining in the middle. Thanks to the large feed area, the large cutting area, the inclined cutting edge, the special modular structure and the specially arranged chips, the entire cutting process can be well controlled and at the same time Ensure better cutting results. The reduced distance between the cutting faces also reduces the risk of thermal effects and blade cracking. The basic part of the YNMG16 indexable insert remains unchanged, so conventional shanks can be used to ensure that the exposed blade holder remains in the center.
The new indexable inserts are powerful and have become the recommended choice in the above-mentioned processing categories. Andreas Koehler, application engineer at Tungaloy, said: "Our competitors have specially polished their indexable inserts, but still can't solve the problem of cutting control. Then they chose our company's YNMG16 blade and its ZF chip breakers have finally achieved better cutting control and greatly improved production efficiency.†YNMG16 indexable inserts have improved their wear resistance and service life by 50%. Combined with ceramic alloy technology, the surface characteristics and firmness of the blade are significantly improved.
Mr. Koehler concluded: “The use of our company's YNMG16 indexable inserts has been successful. The cost of replacing a special tool with a standard tool can be reduced by 30%. The overall cost can be reduced even by combining various factors. %."
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