大功率超声振动拉拔钛合金丝材的实验研究

为促进超声振动拉丝技术的实际应用，解决难拉拔材料的丝材加工问题，建立1套大功率超声振动拉丝实验系统，系统由超声波电源、换能器、变幅杆、传振杆、拉丝模、拉丝机等组成。通过对钛合金丝材未经预处理的直接拉拔实验，考察在实际拉丝加工过程中，超声振动对拉拔力和丝表面质量的影响。实验结果表明：当振幅达到一定值后，能使拉丝机的张力调节周期延长3倍以上，有效减少丝材的不均匀变形，使拉丝过程趋于稳定；当拉拔速度为670mm／s时，可使拉拔力减小近15％，改善丝材的表面质量。

Experimental research of the titanium alloy wire drawing with high power ultrasonic vibration

In order to carry out the practice application of wire drawing using ultrasonic vibration, and to solve the processing problem of the difficult-to-draw material, a set of experiment system on wire drawing using high power ultrasonic vibration is designed and built, which is composed of a ultrasonic power sup- ply, a transducer device, a die and a drawing machine, etc. Through directly drawing experiment of titani- um alloy wire without preprocessing, the effects of ultrasonic vibration for drawing force and surface quali- ty of wires are discussed in practice application of wire drawing process. The experiment result shows that when ultrasonic vibration amplitude was enough, the action effect of ultrasonic vibration is the best; it can effectively prolong tensile-regulation cycl~ of wire drawing machine more than three times. The ultrasonic vibration can reduce uneven deformation of wire and is benefitial to surface qualities. When drawing speed is 670mm/s, the reducing ratio of the drawing force caused by ultrasonic vibration is about 15% and the surface quality is improved.