SPINDLE-TOOL ASSEMBLY USING SHAPE MEMORY ALLOY AND MACHINE TOOL HAVING THE SAME

摘要

PURPOSE: A spindle-tool holder combined body using shape memory alloy and a machine tool using the same are provided to simplifying clamping structure and facilitate tool replacement. CONSTITUTION: A spindle-tool holder combined body comprises a tool holder(120), a spindle(110), and a combining unit(140). A tool(130) for machining is fixed to the tool holder. The spindle rotates the tool holder. The tool and the spindle are installed to have same center axis. The combining unit comprises a coupling shaft and a fixing hole. The coupling shaft is formed through the machining the outer periphery of the spindle. The coupling shaft is projected from the end portion of the spindle. The fixing hole is formed in the tool holder.