Welding forms a $$ joint

$$ surfaces are surfaces that are in contact or in close proximity $$

Two main categories are $$ and $$ welding

Arc, resistance, oxyfuel are examples of $$ welding

Hazards in arc welding include $$ adiation and sparks etc

Diffusion, friction and ultrasonic welding are part of $$ welding

Five type of joints include $$

$$ lap, tee and edge

Type of welds include $$ lug, spot, flange etc

$-$ produces the highest power density while $q,$ produces the lowest

Find PD if $70\%$ of power is transferred to a $5$ mm circle from a $3000$ W source

From above, Find PD in outer ring if $90\%$ of power is transferred to a $12$ mm circle from a $3000$ W source

Um is the sum of $$

$q,$

$H_w=f_1{f}_{2}H{U}_m=K{T}_m^2$

$H_w=U_{m}V$

The rate of heat energy provided is given by $$ and is given as $R_{Hw}=U_m{R}_{WV}$

Where $R_{Hw}=\frac{J}{s}$ and $R_{wv}=m\frac{m^3}{s}$ and is given as $R_{Hw}=f_{1f_2}{R}_H=U_{m*}{A}_W*$

The power source generates $3500$ W with $f1=0\mathrm{.}7$ to metal with $Tm=1760K,f2=0\mathrm{.}5.$ Weld of $A=20m{m}^2$ is made. Find travel speed $v$ if $K=3\mathrm{.}33{10}^{-6}?$

Welding with power $=4080W$ with $f1=0\mathrm{.}73$ and $f2=0\mathrm{.}62$ and filler wire of $3\mathrm{.}85$ mm is used. Final weld contains $58\%$ filler and $42\%$ base metal. $Um=11\mathrm{.}31$ and speed $v=4\mathrm{.}50m\frac{m}{s}.$ Find $($a$)A$ of weld and $($b$)$ feed rate $(m\frac{m}{s}$ of wire$)$