Общий каталог Mitsubishi 2020 - 2021 - страница 679

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GROOVING / CUTTING OFF GROOVING / CUTTING OFF MACHINING RECOMMENDATIONS Notes on multi-function machining (MF, MS and MM breakers) For internal grooving, the machining methods for external grooving (F212 – F213) can be used, but please note the following precautions. Coolant Machining blind holes aSupply large amounts of coolant for effective chip disposal aAs continuous chips tend to elongate at the back of the during cutting. Maintain supply until the tool has been bore, the above operation is recommended. retracted completely for improved chip disposal. The recommended width of cut for x is .020 inch. F Machining Wide Grooves Grooving aWhen the insert width is x 2 ≥ groove width a When the insert width is x 2 < groove width Chips Coolant aWhen the depth of cut is shallower than the insert width,continuous chips are usually produced. When plunging inaWhen the groove depth is larger than the insert width, several passes, it is recommended to carry out machining in carry out plunging in the steps above to break up chips the steps above. This ensures that coolant reaches the cutting efficiently. edge and chips are easily discharged. Turning Machining instruction aWhen chip breaking and aWide face grooving when the corner R of the workpiece is aIt is recommended to carry out disposal are especially equal to the corner R of the insert, machine as shown above. grooving from the front end of important, cross-feed (When corner R of the workpiece is larger than corner R of the workpiece. This reduces machining is recommended. the insert, refer to the description of external wide grooving.) workpiece deflection. aIf the groove depth exceeds a given level, chips may elongate at the wall. In such a case, increase the feed and carry out machining as shown above. F226