摘要
PQF轧管机的摆臂为厚板结构,材质Q345-D,质量达3.2 t,机加工面多、空间尺寸多、几何公差复杂,要求结构件组对焊接变形要控制到最小,一般焊接工艺无法保证焊接质量。本文探讨了采用整体组对,辅以拉撑刚性固定的优化焊接工艺,防止产生未焊透、裂纹等缺陷,选择多层多道对称交替施焊,有效地控制了焊接变形,且焊后进行去应力工艺,保证了机加工面合理的加工余量,满足了设计尺寸偏差及几何公差。
The swing arm of PQF rolling mill is the thick fabric with the materials Q345-D and weight 3 200 kg. There are many machine surfaces and complex geometric tolerance. The structure must have good fabricate quality and small weld- ing distortion. It cannot ensure welding quality to commonly welding procedure. We have discussed that fitting whole and fix up rigidity with supports and optimize welding technic avoiding a few welding defects such as incomplete penetration et al. We have chosen effective means to control welding distortion that depends on multilayer symmetry welding by turns and carrying through heat treatment for release stress. All these assured logical excrescent machine measure, dimension warp and complex geometric tolerance.
出处
《新技术新工艺》
2012年第1期50-53,共4页
New Technology & New Process
关键词
摆臂
焊接工艺
焊接变形
Swing arm,Welding process, Welding distortion
