Eliminate axial and radial blade displacement to improve tool life performance

Machining workshops are always committed to obtain better quality, higher consistency and faster output, but also very concerned about controlling or reducing costs. In order to meet higher performance standards or lower unit costs, machining centers and multi-task machine tools are constantly being updated. Indexable inserts can significantly reduce costs. However, with the increase in cutting speed, to obtain high-quality machining, longer tool life, stable production and consistent machining results, the stability of the insert must be better. The current machining workshop must pay attention to the small displacement of the blade in the radial and axial directions in order to maintain a higher cutting speed, extend the tool life and produce higher quality products.

In terms of insert stability, various measures have been taken to solve the problem of precise positioning and clamping of indexable inserts to ensure that the inserts can safely and reliably withstand cutting with minimal displacement or movement. load. Now, Sandvik Coromant's new iLock interface can obtain excellent blade retention.

For the process in which certain cutting forces make the insert lean against the side wall of the insert seat so that the insert obtains good support and positioning, the typical three-point positioning method of the conventional insert seat is still effective. Other machining, such as profiling turning, high-speed machining, thread cutting and fine milling, have higher requirements for the stability of insert clamping, and conventional methods can no longer meet this requirement. In these application areas, only by adopting special methods to offset the influence of the radial cutting force exerted on the cutting edge, can we stably obtain high-quality machining results.

The risk of insecure blade clamping

The centrifugal force acting on the blade during high-speed machining is very large. For example, during high-speed cutting with a spindle speed of up to 40,000 rpm, if a cemented carbide insert (assuming a weight of 0.015 kg) is released from the insert seat of a 40mm diameter milling cutter, the insert will fly out at a speed of 84m/s, which is equivalent to from a pistol Shot out of the bullet!

Most conventional blade clamping methods cannot avoid micro chipping of the blade or breakage of the edge line, resulting in a slight displacement of the blade due to the failure of the blade. This necessitates frequent tool changes during high-speed cutting, which is time-consuming and costly. Longer, more reliable and predictable tool life is the key to ensuring efficient, economical, and successful machining.