Каталог Iscar вращающийся инструмент 2017 - страница 734

USER GUIDE TAPS Troubleshooting Problem Cause Solution Incorrect tap (cutting geometry unsuitable for Use tap selected from the relevant material group application) Faulty alignment Ensure that the tap is correctly aligned with the core hole axis Tapped hole Improve lubrication and direction of coolant oversized Tap jamming Adjust cutting speed Incorrectly reground tap (lead tip is not Regrind tap concentric) Problem Cause Solution Incorrect tap (cutting geometry incorrect for Use a tap from the relevant material group application) Spindle speed and feed rate are not Check feed rate programming and/or pitch of leading Stripped synchronized spindle. Use a tapping spindle with axial float (GTI/GTIN) threads Insufficient starting pressure exerted on tap Increase starting pressure (causes peeling) Problem Cause Solution Bell mouthed Incorrect starting pressure Use a tapping spindle with axial float (GTI/GTIN) tapped hole Problem Cause Solution Incorrect tap (cutting geometry unsuitable Select tap for the relevant material group for application) Unsatisfactory The tap is blunt Replace or regrind tap thread surface finish Tap badly re-ground Regrind tap. Check that cutting geometry is suitable for material Incorrect lubricant, concentration or quantity Ensure the use of a suitable coolant and an ample supply Problem Cause Solution Swarf jamming Check cutting speed. Use alternative tap Tap has jammed against bottom of pre-hole Check hole and thread depths. Drill a deeper pre-hole Partial Tap incorrectly reground (lead-in diameter too chipping of tap Ensure that correct dimensions are maintained when regrinding short, therefore too few cutting teeth) Irregular workpiece material structure Adjust cutting speed. Improve lubricant quality of coolant Problem Cause Solution Incorrect cutting speed Adjust cutting speed to suit workpiece material Coolant lacking in lubricating qualities Ensure the use of a suitable coolant and an ample supply. Check that Excessive tap and/or quantity the coolant is reaching the cutting zone wear Check pre-hole drilling conditions (drill carefully to reduce risk of surface Surface of the pre-hole is compacted compacting). Check drill cutting edges Problem Cause Solution Incorrect tap in use (cutting geometry Use tap from the relevant material group unsuitable for application) Centering error Ensure that axes of tap and pre-hole are aligned Tap breakage Blunt tap regrind tap Tap has reached bottom of pre-hole Use tapping spindle with axial float and slipping clutch (GTI/GTIN) Pre-hole too small Check for correct pre-hole size, see pages 720-721 730 730 ISCAR ISCAR