Weld Drawings

Welding Drawing

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Designing for weldingThe primary importance of welding is to unite various pieces of metal so that they will operate as a unit structure to support the loads to be carriedWelding processes include arc welding, gas welding, and resistance welding (40 total processes exist)

Gas & Arc WeldingMost common form is oxyacetylene welding gets heat from the burning of flammable gases. It is slow compared to other modern welding methods so is used primarily for repair & maintenanceArc welding is the major industrial welding process-heat is generated by an electric arc struck between a welding electrode, or rod, and the workpiece. The arc is hot and melting and solidification of the weld metal occurs rapidly.

Resistance weldingWidely used especially for mass production workHeat is created from resistance losses as a high amperage current is sent across a joint between 2 mating surfaces

Plug weldingA plug weld refers to joining two pieces by welding through a hole in one of the pieces*

WELDING DRAWINGS

BASIC WELDING JOINTS

J-GROOVEFLARE BEVEL GROOVESPOTPROJECTIONSEAM

FILLETPLUGSLOTSQUARE GROOVEBEVEL GROOVE

APPLICABLE WELDSTYPE OF JOINT

WELDING DRAWINGS

BASIC WELDING JOINTS

J-GROOVEFLARE V-GROOVEFLARE BEVEL GROOVEEDGE FLANGE

SQUARE GROOVEV-GROOVEBEVEL GROOVEU-GROOVE

APPLICABLE WELDSTYPE OF JOINT

WELDING DRAWINGS

BASIC WELDING JOINTS

FLARE V-GROOVEFLARE BEVEL GROOVEEDGE FLANGECORNER FLANGESPOTPROJECTIONSEAM

FILLETSQUARE GROOVEV-GROOVEBEVEL GROOVEU-GROOVEJ-GROOVE

APPLICABLE WELDSTYPE OF JOINT

WELDING DRAWINGS

BASIC WELDING JOINTS

J-GROOVEFLARE BEVEL GROOVESPOTPROJECTIONSEAM

FILLETPLUGSLOTBEVEL GROOVE

APPLICABLE WELDSTYPE OF JOINT

WELDING DRAWINGS

BASIC WELDING JOINTS

EDGE FLANGECORNER FLANGESPOTPROJECTIONSEAMEDGE

PLUGSLOTSQUARE GROOVEBEVEL GROOVEV-GROOVEU-GROOVEJ-GROOVE

APPLICABLE WELDSTYPE OF JOINT

The difference between Weld symbol & Welding symbol…*

Weld symbol indicates the type of weldWelding symbol is a method of representing the weld on drawings. It includes supplementary information & consists of the following 8 elements.

Reference line Arrow Basic weld symbol Dimension and

other data Supplementary

symbols Finish symbols Tail Specification,

process or other reference

WELDING DRAWINGS

WELD TERMINOLOGY

Location significance of Arrow*

Arrow side- for fillet, groove, flanged weld symbols the arrow connecting the welding symbol reference line to one side of the jointOther side – the side opposite the arrow sideBoth sides

WELDING DRAWINGS

WELDING SYMBOLS

WELDING DRAWINGS

WELD TERMINOLOGY

WELDING DRAWINGS

COMPARISON OF A CAST SHAFT SUPPORT WITH A WELDED STEEL SHAFT SUPPORT