seminar on welding
TRANSCRIPT
Joining process, Welding Joining process, Welding and Robotic weldingand Robotic welding
Presentation by:Praveen Jalaraddi
In-charge/Regional Marketing OfficerFUTURE ROBO SYSTEM
• The student will learn about…
• The methods by which materials are joined – permanent and semi-permanent techniques
Overview – JOINING MATERIALSOverview – JOINING MATERIALS
• Metallurgical• Brazing• Soldering• Mechanical• Screw Fasteners• Compression Joints• Riveting• Sheet Metal Folding
JOINING PROCESSESJOINING PROCESSES
JOINING PROCESSESJOINING PROCESSES
•METALURGICAL•Soldering
Coil
JOINING PROCESSESJOINING PROCESSES•MECHANICAL•Rivets
Snap Head Rivet
Welding ProcessesWelding Processes
Ship Structures
A Brief History of WeldingA Brief History of Welding• Late 19th Century
• Scientists/engineers apply advances in electricity to heat and/or join metals (Le Chatelier, Joule, etc.)
• Early 20th Century• Prior to WWI welding was not trusted as a method to join
two metals due to crack issues• 1930’s and 40’s
• Industrial welding gains acceptance and is used extensively in the war effort to build tanks, aircraft, ships, etc.
• Modern Welding• the nuclear/space age helps bring welding from an art to a
science
Types of WeldingTypes of Welding
Fusion Welding Pressure Welding
Homogeneous Heterogeneous
Brazing SolderingGas Welding
Electroslag
High Energy Beam
Electric Arc
MIGTIG
Shielded Metal Arc – “Stick”
Friction Welding
Weldability of a MetalWeldability of a Metal• Metallurgical Capacity
• Parent metal will join with the weld metal without formation of deleterious constituents or alloys
• Mechanical Soundness• Joint will be free from discontinuities, gas porosity,
shrinkage, slag, or cracks• Serviceability
• Weld is able to perform under varying conditions or service (e.g., extreme temperatures, corrosive environments, fatigue, high pressures, etc.)
Fusion Welding PrinciplesFusion Welding Principles
• Base metal is melted• Filler metal may be added• Heat is supplied by various means
• Oxyacetylene gas• Electric Arc• Plasma Arc• Laser
Fusion WeldingFusion Welding
BASE METAL
WELD
SOLIDIFIED SLAG
ARC POOL
WELDING ATMOSPHERE
CORE WIRE
ELECTRODE COATING
ARC STREAM
PENETRATION DEPTH
• Uses a consumable electrode (filler wire made of the base metal)
• Inert gas is typically Argon
Metal Inert Gas (MIG)Metal Inert Gas (MIG)
BASE METAL PUDDLE
POWER SOURCE
DRIVE WHEELSCONSUMABLE ELECTRODE
ARC COLUMNSHIELDING GAS
Welding PositionsWelding Positions
FLATFLAT
HORIZONTALHORIZONTAL
VERTICALVERTICAL
OVERHEADOVERHEAD
INCREASING DIFFICULTY
Joint DesignJoint Design
BUTT JOINTBUTT JOINT
STRAP JOINT
LAP JOINT
FILLET JOINT
CORNER JOINT
Example Welding SymbolExample Welding Symbol
1/2” 1/2”
1/2
1/2
One-sided welds are max 80% efficientTwo sided are 100% efficient
Geometry symbol for V-groove
Weld Symbols (Butt Joints)Weld Symbols (Butt Joints)
Backing
Weld Symbol (Fillet Joints)Weld Symbol (Fillet Joints)
Weld Symbol (Corner Joints)Weld Symbol (Corner Joints)
Robotic Welding MachinesRobotic Welding Machines
Control OverviewControl Overview• PLC
• I/O Modules• Inputs
• Sensors• Outputs
• Solenoids• Safety• Remote Devices
• Robotic Arms
InputsInputs• Sensors
• Proximity Switches• Inductive• Capacitive
• Reed Switches
OutputsOutputs
• Machine Components• Solenoids• Relay Coils
Remote DevicesRemote Devices
• Robotic Arms• Turntables• Remote I/O
SafetySafety
• Light Curtains• Emergency Stop• Interface
Any Queries
Thank You