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Welding Conpetencies
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Basics competencies of Welding process

Binay ROY
Hey I am a B.TECH Mechanical Engineering Student and currently studying in 3rd year. I am very cool minded. Whatever I did, did with most si

Unacademy user
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  1. Binay Roy NPTEL Certified Student Winner at Various Robotics Competitions Complete Knowledge of AutoCAD and SolidWorks 8.5 Pointer TPO coordinator Internshala Student Partner Skubotics Marketing Intern Trainee at Jindal Saw Ltd. https://unacademy.com/user/iambinayroy


  2. WELDING


  3. COMPETENCIES IDENTIFY THE DIFFERENT TYPES CONSUMABLEAND NONCONSUMABLE BLECTRODE WEDING PROCESSES IDENTIFY THERLAME CHARACTERISTICS ASSOCIATED WITH DIFFERENT TYPES OFGAS WELDING IDENTIFY THE UNIQUE CHARACTERSTICS FOR EACH TYPEOF ARC W DING UST THEADVANTAGES AND DISADVANTAGES OF GAS AND ARC WELDING


  4. WELDING SOLDERING AND BPAZING AREADHESVEBONDS WHEFEAS WEDING ISA COHESVE BOND JOINT PREPARATION BUTT JOINTS VEEJOINTS DOUBLEVEEJOINTS TEEJOINTS WHICH REQUIREA ALLET WBD, AND LAP JOINTS BJTOINTS ARE USD ON METALTHAT HAS A THICKNESS OFONE QUARIERINCH ORLESS RATION FORWELDJOINTS SUFFACES TO BEJOINED MUSTBEGRDUND TO THEWED SPECIACATION. ANY SLAG, CO REMOVED. SON, OR OTHER FO GN MATERAL MUST BE


  5. GASWHLDING OXYGEN-ACETYLENEWELDING . OXYGEN TANK (G ) . ACETYLENETANK (FED, ORBLACKWITHA FED TOP) OXYGEN PRESSUREVALVESHAVEA RGHFHAND INTERNAL THREAD ACETYLENEPRESSUREVALVEHAS AN EXTERNALLEFT-HAND THREAD AN OXYGEN-ACETYLENELAMEIS VERY HOT, APPFOACHING 3500


  6. GASWELDING . FUSION WELD IS TO PLACE THE TWO PIECES AGAINST EACH OTHERAND MELT TH R SUFFACES TOGETHER REDUCING FLAME IS USED TO MBLT LOW-MELTING-POINT METALS AND ALLOYS BECAUSEIT DOESNOT OXIDIZEORCORRODETHEMETALS NEUTRAL FLAME IS THEHOTTEST ONEPOSSIBLEAND IS THEPROPER ADJUSTMENT FOR WELDING. OXIDIZING FLAME THAT CAN CAUSECORROSION IN THEMETAL ITIS ONLY USED FORCUTTING ALAMES OR BURNING PIECES OF METAL FROM A PIECEOF STOCK (HG 14-9)


  7. GASWELDING ADVANTAGES OF AN OXY-ACETYLENE WBLD INEXPENSIVE REQUIRES VERY UTTLESPECIALIZED EQUIPMENT DISADVANTAGES ANY TRACES OFCARON LFT IN THEWELD W LL WEAKEN IT


  8. GASWHLDING OXYGEN-HYDROGEN WADING THE OXYGEN-HYDRDGEN TORCH CAN FACH TEMPERATU MUCH HIGHER THAN THEOXY-ACETYLENE TORCH MOFEEXPENSIVETHAN OXY-ACETYLENEWELDING AND INVOLVES THE FLAMMABIUTY ASK W ITH HYDRDG EN BLDIN HYDROGEN PLASMA BURNS EVEN HOTTERTHAN HYDROGEN GAS PEFMITTING THEWELDING OF EXTREMBLY HIGH-ME TING-POINT METALS VERY CLEAN CEDURETHAT LIS IN VERY UTTLESLAG ORFO GN MATTER IN THEWELD


  9. BLECTRCAL WELDING RSSTANCE WELDING-THE TWO PARTS AREASSE) TOGETHER AND AN ALTERNATING CURFENT (A C) ISPASSED THROUGH THE CONTACT ZONE . SPOTWELDING -USED EXTENSVELY ON SHEET METALS (HOLDS HANDLES ON POTS CARBODY TOGETHER . RBBON WELDING ROLLERS PARIS TO BEWELDED ARE DRAWN BEIW EEN BECTRODES ROLLERS WHILE BLECTRCITY IS APPLIED


  10. 400 lb (2 kN) Water Out 2 kN BeforeAfter 2 kN 2 KN Upper electrode ugget 7000 A for steel 15000A 5 mn for steel 10000A 6 mm for steel 13 000A for Al Duration 10 cycles Duration 20 cycles figure 18.15


  11. CONSUMABLEBLECTRODES FLUX CORE ARC WELDING (FCAW DEVEHOPED IN THEEARLY 1950S ASAN ADAPTATION TO SMAW TO OVERCOMELMITATION IMPOSED BY THEUSEOFA STICK BLECTRODES USESA SPOOLOF ALLERWIREFED THROUGH THEHAND- PECE A COREOF ALUX IS INSIDE THEWIRE TWO VERSONS SELF SHIBLDBD ALUX-CORED ARC WELDING INCLUDES NOTONLY ALUXES BUT ALSO INGREDIENTS THAT GENERATESHIBLDING GASES FOR PROTECTING THEARC. GAS SHIBLDED ALUX-CORED ARC WBLDING DEVBOPED PRMARLY FOR WBDING STEAS OBTAINS A SHIBLDING FFOM EXTERNALLY SUPPLE GASES SMILARTO GMAW


  12. A SUSTAINED ARC SHIBDED BY MOLTEN SLAG ISMAINTAINED IN CONSUMABLEEECTRODE WBDING BY THE (A) SHI DED METAL-ARG (B) SUBMEFGED ARC AND (C) ECTROGAS METHODS Wire Guide tube ac or de Wire Contact tube Flux Workpicce Move up orc Coating In water Travel Slag ac or de slag Melt Out Dam Molten slag Solidified HAZ Weld weld metal Solid weld (pool) -Starting figure 18.19