392 Каталог KORLOY 2020 Инструмент и оснастка для станков по металлу Стр.D8

Каталог KORLOY 2020 Инструмент для станков по металлу Стр. D8 0392 Lab2u

Technical Information for Threading O Cutting condition depending on Material type Workpiece Material dimension f V- L J Dieter- and ie th f g, chipflow character (jdjgjc' Material hardness HrC I- B Thread application External or internal j Profile shape Surface finish Machine Machine stoMrty \ Max. RPM r Clampng system stabNty Trouble shooting Problem Possible cause Solution Increased flank wear Cutting speed too high Depth of cut too low/too many passes Unsuitable carbide grade Insufficient cooling Reduce cutting speed/use coated insert Increase the depth of cut per pass Use a coated carbide grade Increase coolant flow rate Uneven cutting edge wear Incorrect helix angle Wrong infeed method Choose the correct shim Use the alternating flank infeed method Extreme plastic deformation Depth of cut too large Insufficient cooling Cutting speed too high Unsuitable carbide grade Nose radius too small > Decrease depth of cut/ increase number of passes > Increase coolant flow rate > Reduce cutting speed > Use a tougher carbide > Use an insert with a larger radius, if possible Cutting edge breakage Depth of cut too large Extreme plastic deformation Insufficient cooling Unsuitable ca rbide grade Instability > Decrease depth of cut/ increase number of passes > Use a tougher carbide > Increase flow rate and/ or correct flow direction > Use a tougher carbide > Check stability of the system Built-up Incorrect cutting speed Unsuitable carbide grade Change the cutting speed Use a coated carbide Thread profile is too shallow The tool is not at the workpiece axis height Insert is not machining the thread crest Worn insert Change tool height Measure the workpiece diameter Change the cutting edge sooner .L Too low cutting speed Wrong shim Flank infeed method is not appropriate > Increase cutting speed > Choose correct shim > Use the alternate flank or radial infeed method Threading 8