Каталог Carmex общий 2021 - страница 103

® Thread Turning Technical Section Example No. 3: Step 1: Choose Thread Turning Method from page A04-5 EX-RH. AMERICAN BUTTRESS We chose EX-RH Insert & Toolholder. 12 TPI on 40 mm diameter. Stainless Steel 304 Step 2: Choose Insert from page A01-31: 16 ER 12 ABUT Step 3: Choose Toolholder from page A02-3: SER 2525 M16   Step 4: Choose Insert Grade from selection on page A04-2 Our choice for Stainless Steel is Grade BMA Step 5: Choose Thread Turning Speed from chart on page A04-3 We chose 120 m/min.Rotational Speed calculation: 1201000954 RPM40 Step 6: Choose Number of Threading passes Replacing the standard anvilwith an anvil with negative from table on page A04-5. We chose 13 passes angle will eliminate side rubbing Step 7: Find Thread Helix Angle: on page A02-19 for Pitch of 12 TPI and 40 Diameter Helix Angle as shown in the chart is 1º Step 8: Choose correct Anvil: As can be seen from the chart on page A04-7, for AMERICAN BUTTRESS Thread, for 12 TPI and 40 Diameter a negative anvil AE16-1.5 should replace the standard anvil supplied with the toolholder Anvil chosen: AE16-1.5 Troubleshooting Chipping Crater Wear Build-up Edge 1. Use a tougher carbide grade 1. Reduce cutting speed 1. Increase cutting speed 2. Eliminate tool overhang 2. Apply coolant fluid 2. Use a tougher carbide grade 3. Check if insert is correctly 3. Use a harder carbide grade clamped   4. Eliminate vibration Thermal Cracking Deformation Fracture 1. Reduce cutting speed 1. Use a harder carbide grade 1. Use a tougher carbide grade 2. Apply coolant fluid 2. Reduce cutting speed 2. Reduce depth of cut 3. Use a tougher carbide grade 3. Reduce depth of cut 3. Index insert sooner 4. Apply coolant fluid 4. Check machine and tool stability A04-9