Active In-Process Control and Fabricating Precision Improvement of Weld Distortion by Using Temperature Distribution Control

利用温度分布控制主动过程控制和提高焊接变形的制造精度

基本信息

  • 批准号:
    17360418
  • 负责人:
  • 金额:
    $ 9.22万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2005
  • 资助国家:
    日本
  • 起止时间:
    2005 至 2006
  • 项目状态:
    已结题

项目摘要

It is well known that evaluating welding distortion and residual stress is important in order to assure material weldability, structural fabricability, and structural integrity. Prediction of welding distortion and its reduction are essential in order to control dimensions and reduce the fabrication cost of welded structures. Therefore, from the viewpoint of manufacturing efficiency, in-process control of welding distortion is more desirable than post-welding rectification or other methods. There are many methods for predicting welding distortion and residual stress, and they are useful for developing an in-process method for controlling weld distortion and residual stress. Welding distortion and residual stress can be calculated under various welding conditions and for various configurations of welded structures by the thermal elastic-plastic analysis. Methods using mechanical prestraining, cooling, optimizing the welding sequence, or using vibration have been developed for residual s … More tress control in welding. Conventional in-process control of weld distortion is performed by using restraint, elastic prestraining, preheating, preheating or/and stretching, or heat control by cooling. These methods have been applied to actual welded structures, but the reduction mechanism-of welding distortion has not been completely studied because most of these techniques were only experientially established for specific conditions. The easiest way to reduce welding distortion is in-process heat control, when both the equipments needed to prevent distortion and the applicability to general purpose are considered. Therefore, in-process control of welding distortion by using a heating or cooling source in addition to the welding torch is considered to be very practical for actual use. The effectiveness of the in-process controlling method is verified by experiment and by three-dimensional thermal elastic-plastic finite element analysis in a welded joint. The appropriate conditions are determined through studying the mechanism by which welding distortion is reduced, and the effectiveness of the in-process method during welding is finally validated. Less
众所周知,为了保证材料的可焊性、结构的可加工性和结构的完整性,评估焊接变形和残余应力是很重要的。为了控制焊接结构的尺寸,降低焊接结构的制造成本,焊接变形的预测和减小是必不可少的。因此,从制造效率的角度来看,焊接变形的过程控制比焊后纠偏或其他方法更可取。预测焊接变形和残余应力的方法有很多,这些方法对于开发控制焊接变形和残余应力的在线方法是有用的。通过热弹塑性分析,可以计算不同焊接条件和不同焊接结构形式下的焊接变形和残余应力。采用机械预应变、冷却、优化焊接顺序或振动等方法对S残馀…进行了试验研究在焊接中更多地控制应力。传统的焊接变形过程控制是通过使用拘束、弹性预应变、预热、预热或/和拉伸、或通过冷却进行热控制来实现的。这些方法已经应用于实际的焊接结构中,但由于这些技术大多只是针对特定条件下的经验建立的,因此减少焊接变形的机理还没有完全被研究。当考虑到防止变形所需的设备和通用性时,最容易减少焊接变形的方法是过程中的热控制。因此,在实际应用中,除焊枪外,通过使用加热或冷却源来控制焊接变形被认为是非常实用的。通过实验和焊接接头三维热弹塑性有限元分析,验证了该过程控制方法的有效性。通过研究减小焊接变形的机理,确定了合适的工艺条件,验证了焊接过程中方法的有效性。较少

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Control of welding residual stress for ensuring integrity against fatigue and stress-corrosion cracking
  • DOI:
    10.1016/j.nucengdes.2006.05.006
  • 发表时间:
    2007-01-01
  • 期刊:
  • 影响因子:
    1.7
  • 作者:
    Mochizuki, Masahito
  • 通讯作者:
    Mochizuki, Masahito
Study on Angular Distortion Reduction by Temperature Distribution Control Using Back Heating Source-Studies on Welding Distortion Control by Temperature Distribution Control Using Multiple Heat Sources (Report 2),
通过使用后热源的温度分布控制来减少角变形的研究-通过使用多个热源的温度分布控制来控制焊接变形的研究(报告2),
Study of Residual Stress Distribution at Start-Finish Point of Circumferential Welding Studied by 3D-Fem Analysis
  • DOI:
    10.1007/bf03266501
  • 发表时间:
    2005-11
  • 期刊:
  • 影响因子:
    2.1
  • 作者:
    M. Mochizuki;J. Katsuyama;R. Higuchi;M. Toyoda
  • 通讯作者:
    M. Mochizuki;J. Katsuyama;R. Higuchi;M. Toyoda
Effect of Heat Input Condition on Reduction of Angular Distortion by Transformation Expansion of Weld Metals-Welding Distortion Control by Transformation Expansion of Weld Metals (Report 3),
热输入条件对通过焊缝金属的相变膨胀减少角变形的影响-通过焊缝金属的相变膨胀控制焊接变形(报告3),
Measurement and Numerical Simulation of Angular Distortion of Fillet Welded T-Joint-Welding Angular Distortion Control by Transformation Expansion of Weld Metals (Report 1),
角焊T型接头角变形的测量和数值模拟——通过焊缝金属的相变膨胀控制焊接角变形(报告1),
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MOCHIZUKI Masahito其他文献

MOCHIZUKI Masahito的其他文献

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{{ truncateString('MOCHIZUKI Masahito', 18)}}的其他基金

Structural integrity and quality assurance of welded components in ship-building process considering with multi-physics phenomena of thermal processing
考虑热加工多物理现象的造船过程中焊接件的结构完整性和质量保证
  • 批准号:
    15H02329
  • 财政年份:
    2015
  • 资助金额:
    $ 9.22万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Precise Thermal Fabrication of Ship Mega-Structures Considering Phenomena of Thermal Process Physics
考虑热过程物理现象的船舶巨型结构的精确热制造
  • 批准号:
    23360384
  • 财政年份:
    2011
  • 资助金额:
    $ 9.22万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Measurement of Microscopic Residual Stress by Using Indentation Method
压痕法测量显微残余应力
  • 批准号:
    23656432
  • 财政年份:
    2011
  • 资助金额:
    $ 9.22万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Thoretical Study on Quantum Domain Walls in Ferroelectrics
铁电体量子畴壁的理论研究
  • 批准号:
    22740214
  • 财政年份:
    2010
  • 资助金额:
    $ 9.22万
  • 项目类别:
    Grant-in-Aid for Young Scientists (B)
Near-Net Shape Manufacturing of Hull Structures in Ship-Building by Using Control of Temperature Distribution and Material Properties
通过控制温度分布和材料性能实现造船中船体结构的近净形制造
  • 批准号:
    20360393
  • 财政年份:
    2008
  • 资助金额:
    $ 9.22万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)

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用于二维温度分布测量的发光中心共掺杂陶瓷荧光粉的研制
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近期压力模式变化对关东平原当地风系统和气温分布的影响
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