焊接外觀檢查Visual inspection for MIG

1、1Technical perfection, automotive passion.Visual GMAW Weld Inspection氣體保護(hù)焊的目視檢查氣體保護(hù)焊的目視檢查GMAW: Gas Metal Arc Welding2Technical perfection, automotive passion.Adequate drawings & specifications 相應(yīng)的圖紙和技術(shù)規(guī)范Acceptance standards clearly understood by both manufacturer and buyer before welding is started.

2、 在開(kāi)始焊接前,客供雙方須清楚地明確接收標(biāo)準(zhǔn).GENERAL PROVISIONS先期準(zhǔn)備3Technical perfection, automotive passion.Three categories:三類工作Prior to welding 焊接前During welding 焊接中After welding 焊接后SCOPE范圍4Technical perfection, automotive passion.Visual acuity 靈敏的視覺(jué)判斷力Experience and Training 接受過(guò)一定的培訓(xùn)和相應(yīng)的經(jīng)驗(yàn)Procedures 理解程序的要求Certificat

3、ion Programs 通過(guò)了能力測(cè)試Safety 完全了解工作環(huán)境的安全要求Prerequisites for inspectors檢驗(yàn)員的必備要求5Technical perfection, automotive passion.Generalvisual examination is a method for identifying surface flaws and imperfections 目視檢查是發(fā)現(xiàn)焊接表面缺陷與次品的方法Fundamentals原則6Technical perfection, automotive passion.Review drawings and s

4、pecifications 審核圖紙與技術(shù)規(guī)范Plan for recording of results 準(zhǔn)備記錄檢查結(jié)果Review / develop control plan 審核并更新控制計(jì)劃Review / develop DFMEA / PFMEA 審核并更新DFMEA / PFMEAPrior to Welding焊接前7Technical perfection, automotive passion.Sequence of welding 焊接的順序Conformance with the applicable procedure i.e. voltage, amperage

5、and travel speed. 與相應(yīng)的程序保持一致,如: 電壓,電流及焊接速度During Welding焊接中8Technical perfection, automotive passion.Final weld appearance 最終焊接外觀Final weld size 最終焊接尺寸Weld Length 焊接長(zhǎng)度Location accuracy 焊接位置的精確度Distortion 變形After Welding焊接后9Technical perfection, automotive passion.Discontinuities眾多缺陷Porosity氣孔Incompl

6、ete fusion不完全熔接Incomplete joint penetration結(jié)合點(diǎn)不完全熔深Undercut咬邊Overlap虛焊Cracks裂縫Burn Thru燒穿Melt back回熔Notching收弧槽Melt thru燒穿Out of position焊偏Hollow弧坑Residue表面焊渣 Weld split 斷弧 FINAL WELD APPEARANCE最終焊接外觀10Technical perfection, automotive passion.Widely distributed廣泛分布Full length整條焊縫都有Mostly on surface表

7、面清晰可見(jiàn)SCATTERED POROSITY離散分布的氣孔NG11Technical perfection, automotive passion.Localized group of pores一撮小氣孔Starting / Stopping areas起弧收弧處Occurs during regions of arc blows氣體沒(méi)保護(hù)處CLUSTER POROSITY群狀分布的氣孔NG12Technical perfection, automotive passion.Usually contamination in joint (hydrocarbon burning) 通常由于結(jié)

8、合部有雜質(zhì)LINEAR POROSITY線狀分布的氣孔NG13Technical perfection, automotive passion.INCOMPLETE FUSION不完全熔接Incomplete fusionNG14Technical perfection, automotive passion.INCOMPLETE JOINT PENETRATION結(jié)合點(diǎn)不完全熔深I(lǐng)ncomplete joint penetrationNG15Technical perfection, automotive passion.OVERLAP虛焊OverlapNG16Technical perfe

9、ction, automotive passion.SHAM WELDING假焊NG17Technical perfection, automotive passion.OUT OF POSITION焊偏18Technical perfection, automotive passion.UNDERCUT咬邊UndercutUndercut19Technical perfection, automotive passion.CRACKS裂縫NG20Technical perfection, automotive passion.MELT BACK回熔21Technical perfection

10、, automotive passion.NOTCHING收弧槽22Technical perfection, automotive passion.BURN THRU燒穿NG23Technical perfection, automotive passion.MELT THRU燒穿Melt Thru24Technical perfection, automotive passion.General Requirement 總要求25Technical perfection, automotive passion.Example1OK26Technical perfection, automo

11、tive passion.OKExample227Technical perfection, automotive passion.OKExample328Technical perfection, automotive passion.OKExample429Technical perfection, automotive passion.OKExample530Technical perfection, automotive passion.NGExample631Technical perfection, automotive passion.OKExample732Technical

12、perfection, automotive passion.NGExample833Technical perfection, automotive passion.Basic Regulation下列準(zhǔn)則應(yīng)予遵守 The scattered, linear, and cluster porosity are not acceptable 不允許出現(xiàn)條蟲狀氣孔和表面氣孔堆積 A single porosity is acceptable 允許有個(gè)別氣孔 The incomplete fusion can not occur in the area b,b1 and b2 區(qū)域b,b1 和b2

13、不允許出現(xiàn)未熔合現(xiàn)象 In non incomplete fusion area b,b1 and b2, the penetration should be more than 0.1mm at least. 沒(méi)有未熔合現(xiàn)象的b,b1 和b2區(qū)域內(nèi)的焊接熔深至少0.1毫米 The depth of hollow should be less than 50% material thickness 弧坑深度50%板厚 The valid depth in the undercut area should be more than 0.8T and no sharp edge 出現(xiàn)咬邊時(shí), 實(shí)際連接深度至少0.8T, 不允許有邊緣鋒利的咬邊.34Technical perfection, automotive passion.Principle for Rework返工原則Can be reworked:以下情況可以返工以下情況可以返工 Missed weld or Split weld 漏焊或斷弧The diameter of burn thru less than