焊接外观检查Visual inspection for MIG.pptVIP

GENERAL PROVISIONS先期准备 Adequate drawings specifications 相应的图纸和技术规范 Acceptance standards clearly understood by both manufacturer and buyer before welding is started. 在开始焊接前,客供双方须清楚地明确接收标准. SCOPE范围 Three categories: 三类工作 Prior to welding 焊接前 During welding 焊接中 After welding 焊接后 Prerequisites for inspectors检验员的必备要求 Visual acuity 灵敏的视觉判断力 Experience and Training 接受过一定的培训和相应的经验 Procedures 理解程序的要求 Certification Programs 通过了能力测试 Safety 完全了解工作环境的安全要求 Fundamentals原则 General visual examination is a method for identifying surface flaws and imperfections 目视检查是发现焊接表面缺陷与次品的方法 Prior to Welding焊接前 Review drawings and specifications 审核图纸与技术规范 Plan for recording of results 准备记录检查结果 Review / develop control plan 审核并更新控制计划 Review / develop DFMEA / PFMEA 审核并更新DFMEA / PFMEA During Welding焊接中 Sequence of welding 焊接的顺序 Conformance with the applicable procedure i.e. voltage, amperage and travel speed. 与相应的程序保持一致,如: 电压,电流及焊接速度 After Welding焊接后 Final weld appearance 最终焊接外观 Final weld size 最终焊接尺寸 Weld Length 焊接长度 Location accuracy 焊接位置的精确度 Distortion 变形 FINAL WELD APPEARANCE最终焊接外观 Discontinuities众多缺陷 Porosity气孔 Incomplete fusion不完全熔接 Incomplete joint penetration结合点不完全熔深 Undercut咬边 Overlap虚焊 Cracks裂缝 Burn Thru烧穿 Melt back回熔 Notching收弧槽 Melt thru烧穿 Out of position焊偏 Hollow弧坑 Residue表面焊渣 Weld split 断弧 SCATTERED POROSITY离散分布的气孔 Widely distributed广泛分布 Full length整条焊缝都有 Mostly on surface表面清晰可见 CLUSTER POROSITY群状分布的气孔 Localized group of pores一撮小气孔 Starting / Stopping areas起弧收弧处 Occurs during regions of arc blows气体没保护处 LINEAR POROSITY线状分布的气孔 Usually contamination in joint (hydrocarbon burning) 通常由于结合部有杂质 INCOMPLETE FUSION 不完全熔接 INCOMPLETE JOINT PENETRATION 结合点不完全熔深 OVERLAP 虚焊 SHAM WELDING 假焊 OUT OF POSITION 焊偏 UNDERCUT 咬边 CRACKS裂缝 MELT BACK 回熔 NOTCHING 收弧槽 BURN THRU 烧穿 MELT THRU 烧穿 OK Example7 NG Example8 Basic Regulation 下列准则应予遵守 The scattered, linear, and cluster porosity are not acceptable