Общий каталог Mitsubishi 2020 - 2021 - страница 1380

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y For Drilling and Plunging a Drilling aThe recommended drilling depth is a Plunging aThe feed for plunging is the less than .5DC. same as the feed for drilling. aUse step feed when drilling (.010 ─ Depth of Cut in .020 inch) to ensure that the chips the Radius Direction a No step feed necessary. are effectively broken. a Use internal or external cooling to a Please refer to the following ensure that the chips disposal is table for the depth of cut at sufficiently achieved. plunging operations. a The chips generated can discharge in any direction, so ensure that Depth of Cut in the Radius Direction < .4DC DC adequate safety precautions aretaken. Peck Feed Peck Feed < .5DC (inch) &.625", .672" &.750", .797" &1.000", 1.047" &1.250", 1.297" & 1.500" Work Material No. Hardness &16 mm , 17 mm &20 mm , 21 mm &25 mm , 26 mm &32 mm, 33 mm, 35 mm &40 mm fr(IPR) Step fr(IPR) Step fr(IPR) Step fr(IPR) Step fr(IPR) Step P Mild Steel 1 < 180HB .001 .008 .002 .012 .002 .012 .002 .012 .002 .012 Carbon SteelAlloy Steel2 180 ─ 350HB .001 .008 .002 .012 .002 .012 .002 .012 .002 .012 M Stainless Steel 1,2,3,4 < 270HB .001 .006 .002 .010 .002 .010 .002 .010 .002 .010 K Gray Cast Iron 1 < 350MPa .002 .016 .002 .020 .002 .020 .003 .020 .003 .020 N Aluminum Alloy 1,2,3 ─ .002 .008 .002 .012 .002 .012 .003 .012 .003 .012 H Hardened Steel 1 40 ─ 55HRC .001 .006 .001 .010 .001 .010 .002 .010 .002 .010 Note 1) Helical grooving is strongly recommended for machining of tempered steel. Note 2) When using the G1-breaker wiht coated grades VP15TF, MP6120 or MP9120, reduce the feed rate by 20%. Note 3) For more information on "No.", please refer to page L201 for cutting speed. y For Ramping L 3° a When machining steel the recommended ramping angle is 3°. If a ramping angle larger than 3° is used, then the chips may not be broken effectively resulting in chips wrapping around the tool. a When ramping, it is recommended to reduce the feed rate by 40%. L205 INDEXABLE MILLING