ME37 FINALEEEE

Incomplete fusion

incomplete penetration

overlap and undercut

Bead welds

Limited penetration so used on
thin materials, or surface modifications

Groove welds

Used on thick materials,
requires joint preparation, used for single and
multiple passe

Fillet welds

use for tee, lap and corner joints

Plug welds

Used a permanent replacement
for rivets or bolts

Bead weld or surfacing weld

groove weld

fillet weld

plug weld

but joint

Lap joint

Tee joint

corner joint

edge joint

single pass, square groove but joint

double pass square groove but joint

single v groove but joint

double V groove but joint

double bevel groove T joint

two fillet T joint

single bevel groove corner joint

two fillet corner joint

what does weldability and joinability depend on?

The ability of a material to be welded
reliability is dependent upon the process
used and the skill of the operator

Unified system.
3/8 is the major diameter or nominal size
16 is the no. of threads per inch (thread pitch)
UNC- thread series (Course/Fine)
2- thread class
A/B- External (A) or internal (B) threads

Metric/ISO system
M- Metric system
6- nominal size
x0.75- thread pitch
5g6g- tolerance class designation
5- tolerance grade, tolerance symbol
g- tolerance position, pitch diameter
6- tolerance grade, tolerance symbol
g- tolerance position, crest diameter

Gear nomenclature

spur gear

helical gears

herringbone gears

straight bevel gears

skew bevels

spiral bevels

hypoid gears

spiral gears

worm gears

internal gear

spot welding

Seam welding

tube welding

projection welding

friction welding

stir welding

American Acme thread

buttress thread

square thread

29 degree worm thread

American standard pipe thread