CAJ | 학술논문

金属成形过程中施加超声激励可显著减小金属成形力,提高金属的变形能力和加工质量。应力叠加、温度升高和接触界面摩擦条件的改变是成形力下降的主要因素。研究了下平板施加超声激励对6061铝合金压缩性能的影响。通过调整接触界面摩擦因数、超声振幅等主要加工参数,基于ABAQUS有限元软件的隐式积分算法模拟了单轴应力情况下施加超声振动对铝合金应力-应变关系的影响规律。结果表明,超声激励降低了工件和模具间的摩擦力并使得6061铝合金材料软化。
금속성형과정중시가초성격려가현저감소금속성형력,제고금속적변형능력화가공질량。응력첩가、온도승고화접촉계면마찰조건적개변시성형력하강적주요인소。연구료하평판시가초성격려대6061려합금압축성능적영향。통과조정접촉계면마찰인수、초성진폭등주요가공삼수,기우ABAQUS유한원연건적은식적분산법모의료단축응력정황하시가초성진동대려합금응력-응변관계적영향규률。결과표명,초성격려강저료공건화모구간적마찰력병사득6061려합금재료연화。
Ultrasonic action in metal forming processing can reduce the forming load significantly;improve metal deformability and processing quality.The main factors effecting the reduction of forming load are the stress superposition,temperature increases and the change in the friction condition of contact interface.The effects of ultrasonic action on the compression performance of 6061 aluminum alloy were studied.By adjusting the main process parameters,such as coefficient of friction at the contact interface and ultrasonic amplitude etc.and based on ABAQUS implicit integration algorithm,the investigation on the influence law of stress-strain relationship under superimposing ultrasonic vibrations by different parameters was processed.The study indicates that ultrasonic action can reduce the interfacial friction and soften 6061 aluminum material during ultrasonic compression.