Proposal and fundamental experiments of a wire drawing method using bisected dies vibrated ultrasonically and transversally - study on drawing using bisected dies vibrated ultrasonically and transversally I -

摘要

In this study, we have proposed a new ultrasonic drawing method in which bisected dies, vibrated ultrasonically and transversally, are used for drawing difficult-to-draw materials such as titanium or difficult-to-draw shapes such as square so as to respectively obtain a good drawability. More specifically, although the conventional axial-symmetric and radial ultrasonic vibration drawing method has proven to be effective for drawing difficult materials with good results, the method is subjected to some drawbacks particularly decreased available amplitude for relatively smaller diameter wires. In an effort to solve the problem, we have developed the above new ultrasonic drawing method. This paper shows the experimental results in which round wires without any oxide coating surface layer were drawn by this method into round or square wires with good surface integrity and/or shape precision, which has been very difficult with the conventional methods with or without ultrasonic vibration.