1107 Каталог WIDIA 2011 Инструментальная оснастка для металлорежущих станков Стр.K71

Каталог WIDIA 2011 Инструментальная оснастка Стр. K71 1107 ENG Lab2u

WIDIA Technical Information Tunable Boring Bars Tuning the Bar Standard tunable boring bars are pretuned at our factory. Though they may work right out of the box on some machines, for others, they may chatter because of differences in dynamic response. Chatter can be eliminated by optimally tuning the boring bar for a given setup, and the key benefit of our tunable boring bars is that they can be adjusted for any application. Therefore, corrections can be made to put the tool in tune with your machine, optimizing dynamic stiffness and negating chatter. Several factors influence the required adjusting screw setting on tunable boring bars, including: Overhang and L:D ratio. Depth of cut. Overall dynamics and rigidity of the machine. When retuning, it is best to slightly under-tune the bar. For this reason, the tuning process focuses on identifying the adjusting screw setting where chatter starts, and then backing off the screw by a 1/2 turn in the negative direction. Retuning a Tunable Boring Bar 1. Loosen both clamping screws. 2. Turn the adjusting screw in the positive direction until it becomes snug. The adjusting screw becomes snug when it locks the tuner mass. 3. Turn the screw one complete turn in the negative direction and take a test cut. 4. Repeat Step 3 until chatter is eliminated. 5. (A) Once chatter is eliminated, note that it starts between the current screw setting and one turn in the positive direction. Make 1/4 turn adjustments within this range, taking test cuts for each setting, until you can identify the adjusting screw setting that causes chatter to start. (B) Once the adjusting screw setting that causes chatter is determined, back the adjusting screw off a 1/2 turn in the negative direction. 6. Tighten both clamping screws and take a test cut to confirm desired results. WIDIA K71 Technical Information