Каталог Widia all star 2020 - страница 178

• TABLE OF CONTENTS
• INDEXABLE MILLING
• 0º/90º SHOULDER MILLS
• 90° HIGH-SPEED CUTTING MILLS
• FACE MILLS
• HIGH-FEED MILLS
• COPY MILLS
• SOLID END MILLING
• HIGH-PERFORMANCE SOLID CARBIDE END MILLS
• GENERAL PURPOSE SOLID CARBIDE END MILLS
• HOLEMAKING
• SOLID CARBIDE DRILLS
• MODULAR DRILLS
• INDEXABLE DRILLS
• TAPPING
• TURNING
• HIGH-PERFORMANCE INSERTS
• GROOVING & CUT-OFF
• Informational Icons Guide
• Material Overview • DIN

High-Performance Solid Carbide End Mills INDEXABLE MILLING Trochoidal Milling TTHelix Angle and Chip Thickness The chip thickness (h) depends on the helix angle of the cutting edge. If the feed fz is constant, the chip thickness gets thinner as helix angle rises. That means with more helix angle, the chip gets thinner — or you can rise feed rate to increase productivity and load to the cutting edge. SOLID END MILLING HOLEMAKING TTCalculation of Chip Thickness The chip thickness (h) is not constant, but defines the load of the cutting edge. By reducing the load on the cutting edge, machining at higher speeds is possible through the machining parameters. For easier calculation, use an average chip thickness hm. When calculating machining data this way cutting data may be compromised because the workpiece is TAPPING often a different shape. fz fz fz B b ap c fz TURNING fs/2 fs/2 hm h hm [mm] = average chip thickness fs [°] = engagement angle ae ae [mm] = width of engagement 360º hm= • • fz • sin c D1 [mm] = outer diameter tool p • fs D fz [mm] = feed per tooth c [°] = lead angle l [°] = helix angle * * Solid End Mills: c = 90°-l NOTE: It makes no difference if the tool is solid or an indexable milling tool. B56 widia.com