How to Prevent Tool Chatter When Turning Slender Shafts?
2 Answers
Improper parameter settings such as tool feed rate and spindle speed can cause resonance during circular motion. Incomplete tool fixation also leads to insufficient tool rigidity. Excessive tool overhang reduces tool stiffness, making deflection deformation non-negligible. Misaligned tool height, where the tool tip is lower than the center axis height, results in excessive tool force and easily induces resonance during circular machining.
Preventing chatter during the machining of slender shafts is based on my years of experience. Firstly, ensure the workpiece is securely clamped, minimize overhang length, and use steady rests or follower rests for support to enhance rigidity. Avoid excessive cutting depth; opt for smaller feed rates and lower spindle speeds to reduce cutting force-induced vibrations. Keep cutting tools sharp, avoid too small a tool nose radius, and select tool holders with good rigidity. Ensure sufficient coolant supply to lower temperature and friction. Before machining, check material hardness and condition to ensure uniformity. Immediately stop and adjust upon detecting any vibration signs to prevent tool and workpiece damage. Regular maintenance of machine tools and equipment is crucial—never overlook wear inspections. Paying attention to these details helps avoid chatter issues, improving precision and surface quality, which is vital for both efficiency and safety.
