Общий каталог Tungaloy 2020 - 2021 - страница 1627

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Classi- ficationShape AShape BShape CShape DShape E Acceptable InsertExt. ToolholderInt. ToolholderThreadingGroovingMiniature toolMilling cutterEndmillDrilling toolTooling SystemUser's GuideIndex User’s Guide - Technical Reference A Chipbreakers Chip controllability B Necessity of chip control (Problems and effects) Necessity of chip control Problems Effects 1. Scattering of chips and 1. Disturbs unmanned and automated machining. ①Why is chip control needed? coolant.2. Wrapping around theworkpiece and the tool.3. Accumulation on the tool, jig,and machining facilities.2. Disturbs high-speed and high-efficiency machining.3. Degrades finished surface.4. Threatens operator’s safety.5. Reduced operation rate.C ②Effect of improper chip control Additional problems when chips are not properlycontrolled D ①Why is chip control needed? ② Effect of improper chip control What is chip? • Defective work. Effects on qualityFor making a product from a workpiece, removedobjects produced by a tool which is set to cut to aEffects on operationspecified depth with the relative motion of the tool• Defective surface finish• Chip entangling• Increased number of man-hours for handling.E• Increased tool costs.• Troublesome chip handling.• Machine stoppage and reduced operation rate. and the workpiece. Problems when chipsare not properlycontrolled Effect on safetyand health. • Stain and damage on machine causedfrom improper carrying-out of chips.• Dangerous effects on the human body.F(Injury and burns on hand, etc.) Effective measures “Chipbreaker” G Chip shapeDepth of cut: smallDepth of cut: largeDescription ofchip shapeAcceptability Effect Chips irregularlyentangled • Wrapping around the tool or workpieceor accumulation around the cutting H Not acceptable point, hindering cutting • Possible damage to the machined surface Long continuous • Bulky during transport in the automatic I spiral chips line RϾ 50 mm • May be preferred when one operator handles one machine J Short spiral chips • Smooth chip flow RϽ 50 mm • Difficult to scatter • Favorable shape K "C" or "9" shaped • Favorable shape if not scattering chips (Around one • Not bulky and easy to transport coiling) L Excessively broken • Readily scattering. If scattering is the only chips. Thin pieces orconnected in a form trouble, it may be acceptable because thechip cover, etc. may be used. M of wave as shown in Not acceptable • Tend to cause chatter, causing harm on the the figure left finished surface roughness or tool life. Tungaloy L039