Обший каталог Yamawa 2016 - 2017 - страница 847

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24. The mechanism for a tap to cut over size on an internal thread 3. Tapping with an improper feed condition over-cutting at axial direction Description of products Process of over-cutting due to excessive feed With cutting edge b1, cutting starts. Not Go gauge Workpiece Cutting part by b1 Excessive-cutting of the thread Tap with excessive feeding Position between workpiece and tap after the tap rotates 1 turn. direction of tapping Distance of excess feeding Workpiece Cutting trace by b1 Tap Position between workpiece and tap after the tap rotates 2 turns. Workpiece Distance of excess feeding Tap The position between workpiece and tap after 3 rotations of tap. Not Go gauge Over-cutting of the thread by too slow feeding Workpiece Distance of excess feeding Process Opposite of excessive feeding Factors in fluencing extra material is cut at back frank. Tap over-cutting during tapping direction of tapping The tap mounting condition in the holder. The condition of bored hole. Feed adjustment is strongly recommanded. Solutions The cutting oil selection. (Use fully synchronous feed system and fixing holder) Incorrect adjustment of feed balance. Selection of the tap depending on material Information When using machines that do not have the being cut. Technical synchronous feed system, such as drilling machine. Adjust the correct weight balance of main spindle properly. Use an axial/radial floating holder for adjustment. Technical-72 843