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