Общий каталог Ingersoll 2011 - страница 1355

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GENERAL TECHNICAL INFORMATION TURNING AND GROOVING PRINCIPLE OF TURNING WITH T-CLAMP ULTRA PLUS TOOLS • The clearance angle a° is a function of the side cutting forces and is not constant as is the case with ISO inserts. Clearance angle between the insert and workpiece The deflection is influenced by: • Feed: f • Depth of cut: ap • Overhang: T • Cutting speed: Vc • Workpiece Material i When these factors are properly applied, the insert (a°) creates a “Wiper ” action providing excellent surface quality and tolerance. FINISHING OPERATION: DIAMETER COMPENSATION • A compensation factor for the finish diameter must be used in the final machining operation. After grooving to the desired diameter, the machining direction changes to longitudinal turning. At this point deflection occurs. If machining continues without tool compensation, corner A will penetrate the workpiecs as a result of the deflection phenomenon. (See picture) This will result in two different diameters ØD1 from the grooving operation and ØD2 from the turning operation. The difference between ØD1 and ØD2 is the change in diameter, designated at Delta ∆. Tool compensation factor is calculated as shown: ∆2 = ØD1- ØD22 Not recommended • Using the compensation factor will eliminate the difference in part diameter. Follow this simple procedure during machining. Recommended 1. Groove to the final diameter. 2.Pull the tool back, with a value of Δ/2. 3. Continue the finish turning operation. 1357