Техническая информация Sumitomo - страница 13

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Technical Guidance Endmilling Edition Troubleshooting for Endmilling ■ Troubleshooting for Endmilling Failure Cause Remedies Excessive Wear Cutting Conditions · Cutting speed is too fast · Decrease cutting speed and feed rate. · Feed rate is too fast Tool Shape · The flank relief angle is too small · Change to an appropriate flank relief angle Tool Material · Insufficient wear resistance · Select a substrate with more wear resistance · Use a coated tool Cutting Edge Failure Chipping Cutting Conditions · Feed rate is too fast · Decrease cutting speed. · Cutting depth is too deep · Reduce depth of cut · Tool overhang is too long · Adjust tool overhang for correct length Machine Area · Work clamps are weak · Clamp the work piece firmly · Tool is not firmly attached · Make sure the tool is seated in the chuck properly Tool Fracture Cutting Conditions · Feed rate is too fast · Decrease cutting speed. · Cutting depth is too deep · Reduce depth of cut · Tool overhang is too long · Reduce tool overhang as much as possible · Cutting edge is too long · Select a tool with a shorter cutting edge Tool Shape · Web thickness is too small · Change to more appropriate web thickness Shoulder Deflection Cutting Conditions · Feed rate is too fast · Decrease cutting speed. · Cutting depth is too deep · Reduce depth of cut · Tool overhang is too long · Adjust tool overhang for correct length · Cutting on the down-cut · Change directions to up-cut Tool Shape · Helix angle is large · Use a tool with a smaller helix angle · Web thickness is too thin · Use a tool with the appropriate web thickness Unsatisfactory Cutting Conditions · Feed rate is too fast · Decrease cutting speed. Machined Surface Finish · Packing of chips · Use air blow · Use an insert with a larger relief pocket. Others Chattering Cutting Conditions · Cutting speed is too fast · Decrease the cutting speed · Cutting on the up-cut · Change directions to down-cut · Tool overhang is too long · Adjust tool overhang for correct length Tool Shape · Rake angle is large · Use a tool with an appropriate rake angle Machine Area · Work clamps are weak · Clamp the work piece firmly · Tool is not firmly attached · Make sure the tool is seated in the chuck properly Packing of Chips Cutting Conditions · Feed rate is too fast · Decrease cutting speed. · Cutting depth is too deep · Reduce depth of cut N Tool Shape · Too many teeth · Reduce number of teeth · Packing of chips · Use air blow Technical Guidance / References N21