'AN IMPROVED FRICTION STIR CUTTING TOOL FOR METAL CUTTING'

摘要

The invention relates to an improved friction stir cutting method for metal cutting, which reduces the cycle time, comprising the steps of : providing a friction stir cutting (FSC) machine having a machine bed, a tool assembly (1,2), and a drive mechanism; placing a job (3) on the machine bed and rigidly holding the job (3) by a holding device; preparing a tool (1) of the FSC machine by selecting a metal harder than that of the job (3), the tool can be configured with multiple types of contour depending on the shape of the job; activating the FSC machine so that the tool rotates at a high speed under an orbital motion; causing the tool to vertically move downward and touch the surface of the job; selecting rotational speed, plunge force, and penetration rate of the tool into the job based on hardness, thickness and shape of the job and feeding the data into the drive mechanism; allowing a dwell-time to the tool when the tool pin full penetrated the job and the tool should tourches the job surface; and imparting a traverse motion to the tool along the cutting direction of the job upon completion of said dwell time.