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旋挖钻机动臂用于连接其上车和钻桅三角架,是旋挖钻机作业时的主要承载结构件之一,承受着较大的振动和冲击载荷。动臂焊接完成后的焊接残余应力,直接影响其承载能力和疲劳寿命。本文通过试验对比方法,探讨采用施工作业方法消除焊接应力的效果。1.消除焊接残余应力方法(1)热处理为消除结构件焊接后的残余应力,通常采用热处理方法。但动臂结构尺寸较大,对热处
Rotary drilling rig boom used to connect the car and the tripod tripod, rotary drilling rig operation is one of the main load-bearing structure, to withstand greater vibration and impact load. Welding residual stress after the completion of boom welding, a direct impact on its carrying capacity and fatigue life. In this paper, the experimental comparison method to explore the use of construction practices to eliminate welding stress effect. 1. Elimination of welding residual stress (1) heat treatment In order to eliminate the residual stress after the welding structure, usually by heat treatment. But the boom structure larger, on the heat