• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2019, Vol. 55 ›› Issue (2): 42-50.doi: 10.3901/JME.2019.02.042

• 材料科学与工程 • 上一篇    下一篇

超声振动-单点增量复合成形过程中成形力的分析与建模

柏朗, 李言, 杨明顺, 姚梓萌, 姚志远   

  1. 西安理工大学机械与精密仪器工程学院 西安 710048
  • 收稿日期:2018-04-28 修回日期:2018-07-18 出版日期:2019-01-20 发布日期:2019-01-20
  • 通讯作者: 李言(通信作者),男,1960年出生,博士,教授,博士研究生导师。主要研究方向为加工工艺、难加工材料及深孔加工、新型加工原理与成形技术。E-mail:liyanxianligong@163.com
  • 作者简介:柏朗,男,1990年出生,博士研究生。主要研究方向为超声振动单点增量成形技术。E-mail:bailangdyx@163.com
  • 基金资助:
    国家自然科学基金(51475366,51475146)和陕西省科技计划(2016JM5074)资助项目

Analytical Model of Ultrasonic Vibration Single Point Incremental Forming Force

BAI Lang, LI Yan, YANG Mingshun, YAO Zimeng, YAO Zhiyuan   

  1. School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048
  • Received:2018-04-28 Revised:2018-07-18 Online:2019-01-20 Published:2019-01-20

摘要: 成形力过大一直是制约单点增量成形技术发展的主要问题之一,针对该问题将超声振动引入单点增量成形技术中,用以降低成形力。为定量揭示超声振动降低成形力的作用机制,对超声振动-单点增量复合成形技术的工作原理和运动规则进行分析总结,取成形接触区域板料微元作为重点分析对象,建立球坐标应力平衡方程,并对接触面上的各向应力进行积分,提炼板料变形处的受力情况并对其进行解析化表达,构建一种关于超声振动-单点增量复合成形技术成形力的解析模型,借此得到施振参数和工艺参数对成形力的影响规律。通过试验对解析模型进行验证,设计开发超声振动主轴及板料夹持系统,搭建Kistler的成形力测试系统。试验表明超声振动可以有效降低成形力,同时存在合适范围的频率和振幅使得成形力达到极小值,且试验中的施振参数和工艺参数对成形力的影响规律与理论计算结果具有很好的一致性,验证了解析模型的正确有效性。研究成果为深入分析超声振动对单点增量成形力的影响提供了理论及技术依据。

关键词: 超声振动, 成形力, 单点增量, 解析模型, 试验验证

Abstract: The excessive forming force has been one of the main problems in the development of single point incremental forming technology (SPIF). Therefore, ultrasonic vibration is introduced into SPIF to reduce the force. The working principle and moving rule of ultrasonic vibration single point incremental forming technology (UV-SPIF) are analyzed to quantitatively reveal the mechanism of reducing the force of UV-SPIF. The spherical coordinate stress equilibrium equation is established by taking the sheet microelement as the analysis object. The each stress is integrated on the forming interface. The stress condition of the deformation area is revealed and the expression is analyzed. An analytical model for the force of UV-SPIF is constructed to obtain the influence rule of the vibration parameters and process parameters on the force. In addition, the analytical model is verified by experiments. The ultrasonic vibration spindle and the clamping system are developed. Force test system of Kistler is built. Experiments show that the ultrasonic vibration can effectively reduce the force. At the same time, the frequency and amplitude of the appropriate range will make the force reach a minimum. In addition, the influence laws of the vibration parameters and process parameters on the force are consistent with the theoretical calculation results, and the validity of the analytical model is verified. A theoretical and technical basis is provided for in-depth analysis of the influences of ultrasonic vibration on single point incremental forming force.

Key words: analytical model, experimental verification, force, single point increment forming, ultrasonic vibration

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