Variable-Helix End Mill Cuts Chatter
Cobra Carbide’s Viper variable helix end mill is designed to help reduce the chatter caused by variations in chip thickness that limits material removal rates.
Cobra Carbide’s Viper variable helix end mill is designed to reduce the chatter caused by variations in chip thickness. The end mill increases material removal rates and provides high stability for materials commonly used in the aerospace industry, such as nickel, Inconel and its alloys, and stainless steel.
The cutting force and vibration level during chatter are large and can damage the workpiece. Variable helix/variable pitching can interrupt the tool vibrations to increase the stability of the operation, the company says. Cutting forces are increased when the helix angle is smaller and reduced when the angle is larger. Variable pitching decreases resonance at any particular cutting speed.
Creating threaded holes in titanium alloys calls for proper techniques based on an understanding of both the properties of these materials and the peculiarities of the tapping process.
To make the transition to hard turning, you'll need to switch from carbide to CBN inserts, but that is easier (and more economical) than you might think. It's making the jump to much higher surface speeds that might scare you off. It needn't. Here's why.
Liquid coolant offers advantages unrelated to temperature. Forced air is the fluid of choice in this shop...but even so, conventional coolant can't be eliminated entirely.