Machine Drawing

170 Machine Drawing

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d:\N-Design\Des11-1.pm5

Table 11.5

Dimensioning of welds

No.

Designation

of welds

Definition

Inscription

1.

Butt weld

s : minimum distance from the

surface of the part to thebottom of the penetrationwhich cannot be greaterthan the thickness of thethinner part

2.

Continuousfillet weld

a : height of the largest iso-

sceles triangle that can beinscribed in the section

z : side of the largest isosceles

triangle that can beinscribed in the section

3.

Intermittent

fillet weld

l : length of weld (without end

craters)

e : distance between adjacent

weld elements

n : number of weld elementsa, z : (see No. 2)

4.

Spot weld

n : (see No. 3)(e) :spacingd : diameter of spot

s s a z

a

n × (e)

l

z

n × (e)

l

d

n × (e)

s s s

ll

(e)

d

d

(e)

z

a

z

a

z

a