Общий каталог Widia 2017 - страница 457

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Technical Information Setup Recommendations Setup Information and Recommendations Tool “D” (above centreline) Set ØB is deflected to position “DF,” relieving the Tip of the Insert load by deflecting to a smaller bore, ØA. Tool “D” This enables the end user to hold closer tolerances, cannot “dig in” because the cut (load) becomes produce a better finish, and avoid chatter. lighter as it deflects. Tool “E” (on centreline or below) Set ØB “digs in” and is deflected toward position ØA “EF” and bore ØC. The larger the load, the larger ØB the deflection. ØC D DF E EF Built-in geometries of WIDIA-CIRCLE™ precision boring bars are based on the concept that theboring bar shank will always be positioned on0,25mm REF. the machine spindle centreline. The cutting point will be slightly high (against direction of rotation) Machine Spindle except when facing centreline or cutting onoutside diameters. Boring Bar Use WIDIA-CIRCLE precision setup level or: Slant Bed Machines 1. Use centre height gage and position insert as shown in illustration. 2. If centre point is unavailable, mark the centre of 0,25mm REF. the bar stock with a centring punch or square. (insert parallel to turret travel) Position the insert as shown in illustration. 3. Lay a straight edge on the insert to help position Centre of Spindle the insert parallel to the travel or centreline. NOTE: In some cases, to help reduce chatter or taper, the insert may need to be rotated less than 0,25mm but more than 0,05mm above centre. widia.com D87