超声波加载方式对等径角挤压工艺的影响规律

Effect law of ultrasonic loading mode on equal channel angular pressing process

采用DEFORM-3D软件建立了超声波辅助等径角挤压有限元模型,模拟不同超声波加载方式、超声波振幅和试样尺寸对等径角挤压工艺的影响,获得了不同工艺参数对6063铝合金成形载荷的影响规律,揭示了超声波在等径角挤压过程中的作用机理。以6063铝合金为试验对象,进行了超声波辅助等径角挤压试验。结果表明,在等径角挤压过程中施加超声振动可有效降低材料的成形载荷,同时施加横向和纵向超声波振动对成形载荷的降低效果最好,其次为单一纵向超声波振动,单一横向超声波振动对成形载荷的降低效果最差。随着超声波振幅和材料尺寸增加,成形载荷的降低值变大。

The finite element model of ultrasonic-assisted equal channel angular pressing was established by DEFORM-3 D software.The effects of different ultrasonic loading modes,ultrasonic amplitudes and sample sizes on equal channel angular pressing process were simulated.The effect law of different process parameters on forming load of 6063 aluminum alloy was obtained.The action mechanism of ultrasonic in equal channel angular pressing was revealed.Ultrasonic-assisted equal channel angular pressing test was carried out on 6063 aluminium alloy.The results show that the application of ultrasonic vibration during equal channel angular pressing can effectively reduce the forming load of materials.Simultaneous application of transverse and longitudinal ultrasonic vibrations has the best effect on the reduction of forming load,followed by single longitudinal ultrasonic vibration,and single transverse ultrasonic vibration has the worst effect on the reduction of forming load.With the increase of ultrasonic amplitude and sample size,the reduction value of forming load increases.