Общий каталог Tungaloy 2020 - 2021 - страница 1665

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DSDJ chipbreakerchipbreaker InsertExt. ToolholderInt. ToolholderThreadingGroovingMiniature toolMilling cutterEndmillDrilling toolTooling SystemUser's GuideIndex User’s Guide - Technical Reference A Drilling To o l s ● Chip shape produced with peripheral insert• Chip problems such as entangling are mainly caused by chips pro-duced with the peripheral insert. These problems are dependent B on the types of Workpiece material and the cutting conditions. • As shown below, when the feed is extremely low, the chips jump over the chipbreaker groove and the continuously long chips maywrap around the drill body.• When the feed is too high, the chips increase in thickness and can C not be curled. • Therefore, it is important to select proper cutting conditions to suitthe machining so that well controlled chips will be formed. D Medium to high carbon steels, alloy steels, etc. As shown below, several turns of coil are an ideal shape.As the feed increases, the curl radius and the number of turns tend to decrease. E ● Typical chip shapes of general steels ● Variation of chip shapes relating to feeds F f = 0.07 mm/revStainless steels, low-carbon steels, low-alloy steels, etc.f = 0.1 mm/revf = 0.13 mm/revG • When machining long-chip materials such as stainless steels and mild steels, the wrong selection of cutting conditions re- sults in chip entangling and tool breakage at worst. Therefore, cutting conditions should be carefully selected.• “C” shaped, continuous coils of several to ten turns having adequately divided lengths are the ideal shape.H ● Ideal chip shapesStainless steel (JIS SUS 304) Mild steel (JIS SS400)( ø22, Vc = 100 m/min, f = 0.1 mm/rev )( ø22, Vc = 160 m/min, f = 0.08 mm/rev )For machining stainless steels or low carbon steels,I DS chipbreaker is recommended. When using a TDX drill in tool-rotating condition, DS chipbreaker produces compact chips and allows morestable machining than DJ chipbreaker. When usingJ it in work-rotating condition, DS chipbreaker pro- vides outstanding affect on chip control. K L M Tungaloy L077