Общий каталог Yamawa 2022 - 2023 - страница 1235

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Description of productsTechnical Information 25. Trouble Shooting Undersize cutting of internal thread Bad surface, surface damaged Improve cuttingperformance Selection and design of tap Work material Improve cuttingperformance Prevent welding Check cutting condition ●Check workmaterial. ●Use workpiece which has even structure and hardness. ●Pay attention to tapping ●Pay attention to tapping position and material thick- position and material thick- ness. ness. ●Adopt bigger bored hole. ●Prevent work hardening of material. ●Prevent work hardening. ●Provide bigger bored holes. ◯Prevent slanting of hole. ○Feed according to pitch. ●Use the tap holder of oating type. ●Prevent vibrating of axis of tap ●Prevent centering-o with work piece. ●Reduce cutting speed. ●Provide proper timing for changing or lling-up of cutting oil. ●Prevent mixing of other oil into cutting oil. ●Use other cutting oil which prevents cold welding. ●Use cutting oil of insoluble type. ●Adjust ow of cutting oil and method of lubrication. ●Remove unnecessary chips ●Provide Nitride on taps. ◎Use oversize taps. ●Use spiral pointed taps ◎Provide oxide coating on ◎Use oil hole taps. (for through hole). taps. ○Provide larger cutting angle. ●Adjust relief angle on cutting ◎Provide larger cutting angle. ●Change of no. of utes on ●Reconsider length of cutting chamfer. ●Adjust relief angle on cutting taps. chamfer. chamfer. ○Provide thread relief. ○Provide more narrow margin. ●Increase re-sharpening ●Provide better surface frequency. nishing on utes. ●Increase re-sharpening frequency. ●Provide precise re-sharpening. ●Be careful about burning during re-sharpening. Technical-84