Общий каталог Mitsubishi 2020 - 2021 - страница 71

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TURNING INSERTS Surface Roughness Rz(!inch) Theoretical Surface Roughness Rz (!inch) TURNING INSERTS WIPER INSERT What is a Wiper Insert? a Improving Surface Finish • The wiper insert is designed with a wiper edge that is Under the same machining conditions as conventional breakers, but with the feed rate situated where the straight edge meets the corner increased, the surface finish of the work material can be improved. radius.A• In comparison to conventionalbreakers, the surface finish does Wiper a Improving EfficiencyHigh feed rates not only shortened machining times but also make it possible tocombine roughing and finishing operations. not deteriorate even if the feed a Increased Tool Life rate is doubled. When a change to high feed conditions, the time required to cut one component is decreased, • Machining at high feed rates thus more parts can be machined with each insert. In addition, the high feed rate prevents improves cutting efficiency. rubbing, therefore, delaying the progression of wear and increasing the tool life of the insert. a Improving Chip Control Under high feed conditions, the chips generated become thicker and are more easily broken, thus, chip control is improved. Finished surfaceWiper insertSame surfaceroughnessStandard insert++ yA wiper insert + machining at high feed rate• Reduced machining time (per work material)• Increased number of work material (per definitive time period) High feed (The feed rate is doubled.) The conventional feed condition • Improving chip control *Please use a wiper insert at high feed rate. yA wiper insert + machining at conventional feed rate• Eliminating the finishing step by roughing and finishing together Standard Insert Work material : AISI 1045Insert : CNMG432pp (Separate roughing and finishing steps | Single-step machining) Cutting Speed=655 SFM Wiper Insert Depth of Cut=.059 inchFeed rate=.008 ─.024 IPR MW Breaker with flood coolant • Reducing cycle times • Increased productivity • Avoiding Line-Stoppage Feed f (IPR) The surface roughness does not deteriorateeven if the feed rate is doubled (.012"→.024")! y The estimate of finished surface roughness when using a wiper insert The effects of wiper inserts on external Rz(W)=Rz×0.5 machining, boring and facing. In case theangle is overthan 5° Rz(W) = Finished surface roughnesswhen using a wiper insert. Rz : Finished surface roughness from *The surface roughness corner R or taper angle when machining at over 5°, is the sameas machining with standard inserts. conventional conditions.(When using a standard insert)Effective uses of a wiper insertNon effective uses of a wiper insert y Special attention is not necessary when using CNMG • WNMG • CCMT types aNo Restriction for HoldersA standard holders can be used. End CuttingAngle a Not Necessary to Adjustthe Machining Program *( A double clamp, recommended.) high rigidity tool is 75° Conventional machiningprograms can be used. End Cutting (The CNMG • WNMG • CCMT AngleNon95°restriction The CNMG type canbe used as a wiper attypes are basedon theISO/ANSI.)Notnecessary tothe 100°corner.adjust y Special attention is necessary when using the DNMX • TNMX types due to the special top face geometry aRestriction for Holders a Necessary to Adjust Use a holder with end cutting angle 93° for improving wiper efficiency. A holder with end the Machining Program cutting angle 91° can improve wiper efficiency (see the following figure), however, there is no When machining errors occur, please wiper efficiency with other end cutting Ex):Theoretical surface roughness of adjust the program. angles (60°, 90°, 107°etc.). holders in using the TNMX160412-MW. (The DNMX•TNMX types are not based on the ISO/ANSI. Please The hole geometry of the DNMX and TNMX type are refer to the next page.) the same as the DNMG and TNMG types. The "X" Standard nose radius Standard corner represents the special geometry of the Corner point. radius Wiper corner radius End Cutting Angle 93° Adjustment (Specified) necessary Feed f (IPR) A032