How to Improve Tool Life in TurningIssuing time:2024-04-05 14:47 The three main machining parameters when turning are speed, feed and depth of cut. Each factor affects tool life. To achieve the best turning tool life: Reduce cutting speed v c (to reduce heat) Optimize feed f n (minimize cutting time) Optimize cutting depth a p (reduce the number of cuts) Cutting speed, v cToo low
Too high
Cutting speed vc has a great influence on tool life. Adjust vc to obtain the best economic vc. (Tool life on the Y axis) Feed rate, f nToo light
Too heavy
Depth of cut, pToo small
Too deep
Tool maintenanceEstablishing a tool maintenance routine in your shop will increase turning tool life, prevent problems and save money. Check the insert seatIt is important to ensure that the insert seat is not damaged during machining or handling. Look for: Pockets that are too large due to wear. Inserts not properly seated on both sides of the slot. Check clearance using a 0.02 mm (0.0008 in) gauge No gaps allowed in the corners between the shim and the bottom of the pocket Shim damage. Shims should not have chipped corners in the cutting area Shim wear due to chip breaking and/or insert indentation Cleaning the blade seatMake sure the insert seat is free of dust or chips from machining. If necessary, clean the insert seat with compressed air. If a boring bar with a cutting head is used, it is also important to check and clean the connection between the cutting head and the boring bar when the cutting head is changed. Torque wrenchFor optimal performance of screw-clamp toolholders, the insert should be properly tightened using a torque wrench. Use the recommended torque for each toolholder. Too much torque can negatively affect the performance of the tool and cause the insert and screw to break Too little torque can cause the insert to move, vibrate and reduce cutting results Clamping screwAlways use a torque wrench to ensure that the screws are properly tightened. Use adequate screw lubrication to prevent the screws from seizing. Lubricant should be applied to the screw threads and screw head surfaces. Replace worn or damaged screws.
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