汽车拨叉加工变形超声振动矫形机构设计

Design of ultrasonic vibration correction mechanism for automobile yoke machiningdeformation

针对拨叉在加工过程中所产生的弹塑性变形问题,结合超声振动理论设计了拨叉弹塑性变形超声振动矫形机构.首先,利用弹塑性理论结合有限元分析得出了拨叉不同方向的变形规律曲线,建立了拨叉横向、纵向变形矫正的数学模型;然后,结合超声振动理论,提出了利用超声振动对变形拨叉进行矫形,对超声振动机构进行了设计;最后,利用ANSYS Workbench对超声振动机构的变幅杆进行了谐响应分析,得出系统谐振频率的大小,并对矫形效果进行了实验验证.结果表明,矫正率达到了90.4%,同时验证了超声振动矫形方法的有效性.

In view of the shifting yoke deformation of the fork in the process of processing,the ultrasonic vibration orthopedics mechanism of the elastic plastic deformation of the fork is designed in combination with the ultrasonic vibration theory.First of all,the use of elastic-plastic theory combined with finite element analysis of the deformation curve of the fork in different directions,and establishes a mathematical model of the shifting yoke correction of horizontal and vertical deformation.Then,combined with ultrasonic vibration theory,proposed the correction for the deformation shifting yoke with ultrasonic vibration,and the ultrasonic vibration mechanism design.Finally,the harmonic response analysis of horn of ultrasonic vibration mechanism is made by ANSYS Workbench,and the resonance frequency of the system is obtained,and the experimental verification of the effect of the amplitude variable rod is also carried out.The results show that the correction rate is 90.4%,and the validity of the ultrasonic vibration correction method is verified.