SlideShare une entreprise Scribd logo
1  sur  22
Télécharger pour lire hors ligne
BYNIKHIL ANAND SRIVASTAVA
3rd YEAR - MECHANICAL ENGG.
SEC - J
ROLL NO - 02
Welding is the process of permanently
joining two or more metal parts, by
melting both materials.
The molten materials quickly cool,
and the two metals are permanently
bonded.
Spot welding and seam welding are
two very popular methods used for
sheet metal parts.






GAS WELDING
ARC WELDING
RESISTANCE WELDING
SOLDERING
BRAZING
Definition :Metal joining process in which the ends
of pieces to be joined are heated at their interface
by producing coalescence with one or more gas
flames (such as oxygen and acetylene), with or
without the use of a filler metal.
Welding Technology - nikhil


Arc welding is a type of welding that uses a
welding power supply to create an electric
arc between an electrode and the base
material to melt the metals at the welding
point.
Welding Technology - nikhil




Resistance welding involves the generation of heat
by passing current through the resistance caused
by the contact between two or more metal
surfaces. Small pools of molten metal are formed
at the weld area as high current (1000–100,000 A)
is passed through the metal.
In general, resistance welding methods are efficient
and cause little pollution, but their applications are
somewhat limited and the equipment cost can be
high.
Welding Technology - nikhil
SOLDERING
Soldering is a process in which two or more metal
items are joined together by melting and flowing a
filler metal (solder) into the joint, the filler metal
having a lower melting point than the workpiece


Brazing is a metaljoining process
whereby a filler
metal is heated
above melting point
and distributed
between two or more
close-fitting parts by
capillary action.
Welding Technology - nikhil






CARBURIZING FLAME
-temp 3150 *C
NEUTRAL FLAME
-temp 3200 *C
OXIDIZING FLAME
-temp 3500 *C
Welding Technology - nikhil


Welds can be geometrically prepared in many
different ways. The five basic types of weld joints
are
1. Butt Joint
2. Lap Joint
3. Corner Joint
4. Edge Joint
5. T-Joint
An image of a cross section of a
welded butt joint, with shading
that shows the locations of the
fusion zone (dark gray) and the
heat-affected zone (middle shade
of gray) in the base material
(light gray)




A welding defect is any flaw that compromises the
usefulness of the finished weldment.
A welding defect mainly weakens the weld joint.
TYPES OF DEFECT
1. Cracks
2. Distortion
3. Welding angular distortion
4. Welding shrinkage
transverse
Welding Technology - nikhil
Welding shrinkage longitudinal
Welding Technology - nikhil
Welding Technology - nikhil
THANK YOU

Contenu connexe

Tendances

Welding Presentation
Welding Presentation Welding Presentation
Welding Presentation arun kumar
 
Dr.R.Narayanasamy - Power Point on Deep Drawing
Dr.R.Narayanasamy - Power Point on Deep DrawingDr.R.Narayanasamy - Power Point on Deep Drawing
Dr.R.Narayanasamy - Power Point on Deep DrawingDr.Ramaswamy Narayanasamy
 
Soldering and brazing
Soldering and brazingSoldering and brazing
Soldering and brazingAakash Zafar
 
Tungsten Inert Gas Welding
Tungsten Inert Gas WeldingTungsten Inert Gas Welding
Tungsten Inert Gas WeldingAVINASH JURIANI
 
Topic 7 joining process welding brazing soldering fastening 160214
Topic 7 joining process welding brazing soldering fastening 160214Topic 7 joining process welding brazing soldering fastening 160214
Topic 7 joining process welding brazing soldering fastening 160214Huai123
 
EXPLOSION / EXPLOSIVE WELDING
EXPLOSION / EXPLOSIVE WELDINGEXPLOSION / EXPLOSIVE WELDING
EXPLOSION / EXPLOSIVE WELDINGSouvik Roy
 
Gass tungsten Arc Welding (GTAW)/ Tungsten Inert Gas Welding (TIG)
Gass tungsten Arc Welding (GTAW)/ Tungsten Inert Gas Welding (TIG) Gass tungsten Arc Welding (GTAW)/ Tungsten Inert Gas Welding (TIG)
Gass tungsten Arc Welding (GTAW)/ Tungsten Inert Gas Welding (TIG) faheem maqsood
 
Atomic hyrogen arc welding
Atomic hyrogen arc weldingAtomic hyrogen arc welding
Atomic hyrogen arc weldingIlyas Hussain
 
UNIT 2 RESISTANCE WELDING PROCESSES
UNIT 2 RESISTANCE WELDING PROCESSESUNIT 2 RESISTANCE WELDING PROCESSES
UNIT 2 RESISTANCE WELDING PROCESSESLearnMech
 
Introduction to welding
Introduction to weldingIntroduction to welding
Introduction to weldingMani Das
 
Metal Joining Processes
Metal Joining ProcessesMetal Joining Processes
Metal Joining ProcessesVishal Shinde
 
Thixocasting process
Thixocasting processThixocasting process
Thixocasting processLikhithraj
 

Tendances (20)

Basic welding
Basic weldingBasic welding
Basic welding
 
Brazing
BrazingBrazing
Brazing
 
Welding Presentation
Welding Presentation Welding Presentation
Welding Presentation
 
Dr.R.Narayanasamy - Power Point on Deep Drawing
Dr.R.Narayanasamy - Power Point on Deep DrawingDr.R.Narayanasamy - Power Point on Deep Drawing
Dr.R.Narayanasamy - Power Point on Deep Drawing
 
Soldering and brazing
Soldering and brazingSoldering and brazing
Soldering and brazing
 
Tungsten Inert Gas Welding
Tungsten Inert Gas WeldingTungsten Inert Gas Welding
Tungsten Inert Gas Welding
 
Topic 7 joining process welding brazing soldering fastening 160214
Topic 7 joining process welding brazing soldering fastening 160214Topic 7 joining process welding brazing soldering fastening 160214
Topic 7 joining process welding brazing soldering fastening 160214
 
Welding ppt bmp unit 3
Welding ppt bmp unit 3Welding ppt bmp unit 3
Welding ppt bmp unit 3
 
Welding Defects
Welding Defects Welding Defects
Welding Defects
 
EXPLOSION / EXPLOSIVE WELDING
EXPLOSION / EXPLOSIVE WELDINGEXPLOSION / EXPLOSIVE WELDING
EXPLOSION / EXPLOSIVE WELDING
 
Gass tungsten Arc Welding (GTAW)/ Tungsten Inert Gas Welding (TIG)
Gass tungsten Arc Welding (GTAW)/ Tungsten Inert Gas Welding (TIG) Gass tungsten Arc Welding (GTAW)/ Tungsten Inert Gas Welding (TIG)
Gass tungsten Arc Welding (GTAW)/ Tungsten Inert Gas Welding (TIG)
 
Atomic hyrogen arc welding
Atomic hyrogen arc weldingAtomic hyrogen arc welding
Atomic hyrogen arc welding
 
Surface Treatment
Surface TreatmentSurface Treatment
Surface Treatment
 
WELDING
WELDINGWELDING
WELDING
 
UNIT 2 RESISTANCE WELDING PROCESSES
UNIT 2 RESISTANCE WELDING PROCESSESUNIT 2 RESISTANCE WELDING PROCESSES
UNIT 2 RESISTANCE WELDING PROCESSES
 
Sheet Metal Forming
Sheet Metal FormingSheet Metal Forming
Sheet Metal Forming
 
Introduction to welding
Introduction to weldingIntroduction to welding
Introduction to welding
 
Metal Joining Processes
Metal Joining ProcessesMetal Joining Processes
Metal Joining Processes
 
Unit 2-JOINING PROCESSES
Unit 2-JOINING PROCESSESUnit 2-JOINING PROCESSES
Unit 2-JOINING PROCESSES
 
Thixocasting process
Thixocasting processThixocasting process
Thixocasting process
 

En vedette (20)

Advanced Welding Technology
Advanced Welding TechnologyAdvanced Welding Technology
Advanced Welding Technology
 
Welding technology
Welding  technologyWelding  technology
Welding technology
 
Welding basics1
Welding basics1Welding basics1
Welding basics1
 
Casting procedure & defects
Casting procedure & defectsCasting procedure & defects
Casting procedure & defects
 
arc welding
arc weldingarc welding
arc welding
 
Welding Presentation.
Welding Presentation.Welding Presentation.
Welding Presentation.
 
Welding ppt
Welding pptWelding ppt
Welding ppt
 
SPAM_CDR_Presentation
SPAM_CDR_PresentationSPAM_CDR_Presentation
SPAM_CDR_Presentation
 
my presentation
my presentationmy presentation
my presentation
 
AIAA presentation
AIAA presentationAIAA presentation
AIAA presentation
 
Drill bit 3
Drill bit 3Drill bit 3
Drill bit 3
 
Coolant separator
Coolant separatorCoolant separator
Coolant separator
 
Drilling Machine
Drilling MachineDrilling Machine
Drilling Machine
 
10 missile guidance-systems
10 missile guidance-systems10 missile guidance-systems
10 missile guidance-systems
 
Lathe machine tool
Lathe machine toolLathe machine tool
Lathe machine tool
 
Drill Bits
Drill BitsDrill Bits
Drill Bits
 
X & Gamma Rays | Best report
X & Gamma Rays | Best report X & Gamma Rays | Best report
X & Gamma Rays | Best report
 
Drilling Engineering - Drill Bit
Drilling Engineering - Drill BitDrilling Engineering - Drill Bit
Drilling Engineering - Drill Bit
 
Application of TIG & MIG Welding in Manufacturing
Application of TIG & MIG Welding in ManufacturingApplication of TIG & MIG Welding in Manufacturing
Application of TIG & MIG Welding in Manufacturing
 
Neutron radiography
Neutron radiographyNeutron radiography
Neutron radiography
 

Similaire à Welding Technology - nikhil

fdocuments.in_introduction-to-weldingppt-56c13478bad3b.ppt
fdocuments.in_introduction-to-weldingppt-56c13478bad3b.pptfdocuments.in_introduction-to-weldingppt-56c13478bad3b.ppt
fdocuments.in_introduction-to-weldingppt-56c13478bad3b.pptPraveen Kumar
 
WELDING Presentation.ppt
WELDING Presentation.pptWELDING Presentation.ppt
WELDING Presentation.pptBenuMadhab
 
WELDING Presentation.ppt
WELDING Presentation.pptWELDING Presentation.ppt
WELDING Presentation.pptIzzatTammam
 
Introduction to WELDING Technology Presentation.ppt
Introduction to WELDING Technology  Presentation.pptIntroduction to WELDING Technology  Presentation.ppt
Introduction to WELDING Technology Presentation.pptVidyaTiwari2
 
welding
weldingwelding
weldingillpa
 
Class Presentation on Welding & Cutting processes
Class Presentation on Welding & Cutting processesClass Presentation on Welding & Cutting processes
Class Presentation on Welding & Cutting processesAbdul Ahad
 
Brazing and soldering
Brazing and soldering Brazing and soldering
Brazing and soldering TheEngineer13
 
Metal Joining Processes: Welding, Riveting, Bolting, Brazing, Soldering
Metal Joining Processes: Welding, Riveting, Bolting, Brazing, SolderingMetal Joining Processes: Welding, Riveting, Bolting, Brazing, Soldering
Metal Joining Processes: Welding, Riveting, Bolting, Brazing, SolderingJJ Technical Solutions
 
Welding & joining
Welding & joiningWelding & joining
Welding & joiningArup Nath
 
Fabrication welding soldring and brazing
Fabrication welding soldring and brazingFabrication welding soldring and brazing
Fabrication welding soldring and brazing1whitefeather
 
Gas and other Welding Shailesh Dewangan.pptx
Gas and other Welding Shailesh Dewangan.pptxGas and other Welding Shailesh Dewangan.pptx
Gas and other Welding Shailesh Dewangan.pptxShailesh Dewangan
 
Ch-19 Gas Welding, Gas Cutting & Arc Welding.pdf
Ch-19 Gas Welding, Gas Cutting & Arc Welding.pdfCh-19 Gas Welding, Gas Cutting & Arc Welding.pdf
Ch-19 Gas Welding, Gas Cutting & Arc Welding.pdfJAYANTKUMAR469151
 
Metal Joining Process- Welding, Brazing and Soldering
Metal Joining Process- Welding, Brazing and SolderingMetal Joining Process- Welding, Brazing and Soldering
Metal Joining Process- Welding, Brazing and SolderingLearnwithus2
 
Welding theory & application definitions
Welding theory & application definitions Welding theory & application definitions
Welding theory & application definitions أحمد دعبس
 

Similaire à Welding Technology - nikhil (20)

fdocuments.in_introduction-to-weldingppt-56c13478bad3b.ppt
fdocuments.in_introduction-to-weldingppt-56c13478bad3b.pptfdocuments.in_introduction-to-weldingppt-56c13478bad3b.ppt
fdocuments.in_introduction-to-weldingppt-56c13478bad3b.ppt
 
WELDING Presentation.ppt
WELDING Presentation.pptWELDING Presentation.ppt
WELDING Presentation.ppt
 
WELDING Presentation.ppt
WELDING Presentation.pptWELDING Presentation.ppt
WELDING Presentation.ppt
 
Introduction to WELDING Technology Presentation.ppt
Introduction to WELDING Technology  Presentation.pptIntroduction to WELDING Technology  Presentation.ppt
Introduction to WELDING Technology Presentation.ppt
 
W1.ppt
W1.pptW1.ppt
W1.ppt
 
welding
weldingwelding
welding
 
Class Presentation on Welding & Cutting processes
Class Presentation on Welding & Cutting processesClass Presentation on Welding & Cutting processes
Class Presentation on Welding & Cutting processes
 
Welding and types
Welding and types Welding and types
Welding and types
 
7th lec welding
7th lec   welding7th lec   welding
7th lec welding
 
welding
weldingwelding
welding
 
Brazing and soldering
Brazing and soldering Brazing and soldering
Brazing and soldering
 
Metal Joining Processes: Welding, Riveting, Bolting, Brazing, Soldering
Metal Joining Processes: Welding, Riveting, Bolting, Brazing, SolderingMetal Joining Processes: Welding, Riveting, Bolting, Brazing, Soldering
Metal Joining Processes: Welding, Riveting, Bolting, Brazing, Soldering
 
Welding unit 3
Welding unit 3Welding unit 3
Welding unit 3
 
Welding & joining
Welding & joiningWelding & joining
Welding & joining
 
Fabrication welding soldring and brazing
Fabrication welding soldring and brazingFabrication welding soldring and brazing
Fabrication welding soldring and brazing
 
Gas and other Welding Shailesh Dewangan.pptx
Gas and other Welding Shailesh Dewangan.pptxGas and other Welding Shailesh Dewangan.pptx
Gas and other Welding Shailesh Dewangan.pptx
 
Ch-19 Gas Welding, Gas Cutting & Arc Welding.pdf
Ch-19 Gas Welding, Gas Cutting & Arc Welding.pdfCh-19 Gas Welding, Gas Cutting & Arc Welding.pdf
Ch-19 Gas Welding, Gas Cutting & Arc Welding.pdf
 
Metal Joining Process- Welding, Brazing and Soldering
Metal Joining Process- Welding, Brazing and SolderingMetal Joining Process- Welding, Brazing and Soldering
Metal Joining Process- Welding, Brazing and Soldering
 
Welding theory & application definitions
Welding theory & application definitions Welding theory & application definitions
Welding theory & application definitions
 
PPT PRESENTATION OF WELDING
PPT PRESENTATION OF WELDINGPPT PRESENTATION OF WELDING
PPT PRESENTATION OF WELDING
 

Dernier

IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019
IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019
IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019IES VE
 
Crea il tuo assistente AI con lo Stregatto (open source python framework)
Crea il tuo assistente AI con lo Stregatto (open source python framework)Crea il tuo assistente AI con lo Stregatto (open source python framework)
Crea il tuo assistente AI con lo Stregatto (open source python framework)Commit University
 
Empowering Africa's Next Generation: The AI Leadership Blueprint
Empowering Africa's Next Generation: The AI Leadership BlueprintEmpowering Africa's Next Generation: The AI Leadership Blueprint
Empowering Africa's Next Generation: The AI Leadership BlueprintMahmoud Rabie
 
Videogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdfVideogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdfinfogdgmi
 
Nanopower In Semiconductor Industry.pdf
Nanopower  In Semiconductor Industry.pdfNanopower  In Semiconductor Industry.pdf
Nanopower In Semiconductor Industry.pdfPedro Manuel
 
20230202 - Introduction to tis-py
20230202 - Introduction to tis-py20230202 - Introduction to tis-py
20230202 - Introduction to tis-pyJamie (Taka) Wang
 
UiPath Studio Web workshop series - Day 6
UiPath Studio Web workshop series - Day 6UiPath Studio Web workshop series - Day 6
UiPath Studio Web workshop series - Day 6DianaGray10
 
Salesforce Miami User Group Event - 1st Quarter 2024
Salesforce Miami User Group Event - 1st Quarter 2024Salesforce Miami User Group Event - 1st Quarter 2024
Salesforce Miami User Group Event - 1st Quarter 2024SkyPlanner
 
Bird eye's view on Camunda open source ecosystem
Bird eye's view on Camunda open source ecosystemBird eye's view on Camunda open source ecosystem
Bird eye's view on Camunda open source ecosystemAsko Soukka
 
Designing A Time bound resource download URL
Designing A Time bound resource download URLDesigning A Time bound resource download URL
Designing A Time bound resource download URLRuncy Oommen
 
Computer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and HazardsComputer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and HazardsSeth Reyes
 
UiPath Platform: The Backend Engine Powering Your Automation - Session 1
UiPath Platform: The Backend Engine Powering Your Automation - Session 1UiPath Platform: The Backend Engine Powering Your Automation - Session 1
UiPath Platform: The Backend Engine Powering Your Automation - Session 1DianaGray10
 
Igniting Next Level Productivity with AI-Infused Data Integration Workflows
Igniting Next Level Productivity with AI-Infused Data Integration WorkflowsIgniting Next Level Productivity with AI-Infused Data Integration Workflows
Igniting Next Level Productivity with AI-Infused Data Integration WorkflowsSafe Software
 
AI Fame Rush Review – Virtual Influencer Creation In Just Minutes
AI Fame Rush Review – Virtual Influencer Creation In Just MinutesAI Fame Rush Review – Virtual Influencer Creation In Just Minutes
AI Fame Rush Review – Virtual Influencer Creation In Just MinutesMd Hossain Ali
 
Meet the new FSP 3000 M-Flex800™
Meet the new FSP 3000 M-Flex800™Meet the new FSP 3000 M-Flex800™
Meet the new FSP 3000 M-Flex800™Adtran
 
9 Steps For Building Winning Founding Team
9 Steps For Building Winning Founding Team9 Steps For Building Winning Founding Team
9 Steps For Building Winning Founding TeamAdam Moalla
 
Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...
Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...
Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...Will Schroeder
 
Linked Data in Production: Moving Beyond Ontologies
Linked Data in Production: Moving Beyond OntologiesLinked Data in Production: Moving Beyond Ontologies
Linked Data in Production: Moving Beyond OntologiesDavid Newbury
 

Dernier (20)

IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019
IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019
IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019
 
Crea il tuo assistente AI con lo Stregatto (open source python framework)
Crea il tuo assistente AI con lo Stregatto (open source python framework)Crea il tuo assistente AI con lo Stregatto (open source python framework)
Crea il tuo assistente AI con lo Stregatto (open source python framework)
 
Empowering Africa's Next Generation: The AI Leadership Blueprint
Empowering Africa's Next Generation: The AI Leadership BlueprintEmpowering Africa's Next Generation: The AI Leadership Blueprint
Empowering Africa's Next Generation: The AI Leadership Blueprint
 
Videogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdfVideogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdf
 
Nanopower In Semiconductor Industry.pdf
Nanopower  In Semiconductor Industry.pdfNanopower  In Semiconductor Industry.pdf
Nanopower In Semiconductor Industry.pdf
 
20230202 - Introduction to tis-py
20230202 - Introduction to tis-py20230202 - Introduction to tis-py
20230202 - Introduction to tis-py
 
UiPath Studio Web workshop series - Day 6
UiPath Studio Web workshop series - Day 6UiPath Studio Web workshop series - Day 6
UiPath Studio Web workshop series - Day 6
 
201610817 - edge part1
201610817 - edge part1201610817 - edge part1
201610817 - edge part1
 
Salesforce Miami User Group Event - 1st Quarter 2024
Salesforce Miami User Group Event - 1st Quarter 2024Salesforce Miami User Group Event - 1st Quarter 2024
Salesforce Miami User Group Event - 1st Quarter 2024
 
Bird eye's view on Camunda open source ecosystem
Bird eye's view on Camunda open source ecosystemBird eye's view on Camunda open source ecosystem
Bird eye's view on Camunda open source ecosystem
 
Designing A Time bound resource download URL
Designing A Time bound resource download URLDesigning A Time bound resource download URL
Designing A Time bound resource download URL
 
Computer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and HazardsComputer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and Hazards
 
20150722 - AGV
20150722 - AGV20150722 - AGV
20150722 - AGV
 
UiPath Platform: The Backend Engine Powering Your Automation - Session 1
UiPath Platform: The Backend Engine Powering Your Automation - Session 1UiPath Platform: The Backend Engine Powering Your Automation - Session 1
UiPath Platform: The Backend Engine Powering Your Automation - Session 1
 
Igniting Next Level Productivity with AI-Infused Data Integration Workflows
Igniting Next Level Productivity with AI-Infused Data Integration WorkflowsIgniting Next Level Productivity with AI-Infused Data Integration Workflows
Igniting Next Level Productivity with AI-Infused Data Integration Workflows
 
AI Fame Rush Review – Virtual Influencer Creation In Just Minutes
AI Fame Rush Review – Virtual Influencer Creation In Just MinutesAI Fame Rush Review – Virtual Influencer Creation In Just Minutes
AI Fame Rush Review – Virtual Influencer Creation In Just Minutes
 
Meet the new FSP 3000 M-Flex800™
Meet the new FSP 3000 M-Flex800™Meet the new FSP 3000 M-Flex800™
Meet the new FSP 3000 M-Flex800™
 
9 Steps For Building Winning Founding Team
9 Steps For Building Winning Founding Team9 Steps For Building Winning Founding Team
9 Steps For Building Winning Founding Team
 
Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...
Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...
Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...
 
Linked Data in Production: Moving Beyond Ontologies
Linked Data in Production: Moving Beyond OntologiesLinked Data in Production: Moving Beyond Ontologies
Linked Data in Production: Moving Beyond Ontologies
 

Welding Technology - nikhil

  • 1. BYNIKHIL ANAND SRIVASTAVA 3rd YEAR - MECHANICAL ENGG. SEC - J ROLL NO - 02
  • 2. Welding is the process of permanently joining two or more metal parts, by melting both materials. The molten materials quickly cool, and the two metals are permanently bonded. Spot welding and seam welding are two very popular methods used for sheet metal parts.
  • 4. Definition :Metal joining process in which the ends of pieces to be joined are heated at their interface by producing coalescence with one or more gas flames (such as oxygen and acetylene), with or without the use of a filler metal.
  • 6.  Arc welding is a type of welding that uses a welding power supply to create an electric arc between an electrode and the base material to melt the metals at the welding point.
  • 8.   Resistance welding involves the generation of heat by passing current through the resistance caused by the contact between two or more metal surfaces. Small pools of molten metal are formed at the weld area as high current (1000–100,000 A) is passed through the metal. In general, resistance welding methods are efficient and cause little pollution, but their applications are somewhat limited and the equipment cost can be high.
  • 10. SOLDERING Soldering is a process in which two or more metal items are joined together by melting and flowing a filler metal (solder) into the joint, the filler metal having a lower melting point than the workpiece
  • 11.  Brazing is a metaljoining process whereby a filler metal is heated above melting point and distributed between two or more close-fitting parts by capillary action.
  • 13.    CARBURIZING FLAME -temp 3150 *C NEUTRAL FLAME -temp 3200 *C OXIDIZING FLAME -temp 3500 *C
  • 15.  Welds can be geometrically prepared in many different ways. The five basic types of weld joints are 1. Butt Joint 2. Lap Joint 3. Corner Joint 4. Edge Joint 5. T-Joint
  • 16. An image of a cross section of a welded butt joint, with shading that shows the locations of the fusion zone (dark gray) and the heat-affected zone (middle shade of gray) in the base material (light gray)
  • 17.   A welding defect is any flaw that compromises the usefulness of the finished weldment. A welding defect mainly weakens the weld joint. TYPES OF DEFECT 1. Cracks 2. Distortion 3. Welding angular distortion 4. Welding shrinkage transverse