Horizontal Position Welding.

WELDING OPERATIONS I - OD1651 - LESSON 1/TASK 1

nut, somewhat smaller than the bolt size, should be centered on

the bolt or stud to be removed.

A heavy-coated electrode is

lowered into the nut and an arc struck on the exposed end of the

broken bolt or stud. The nut is then welded onto the broken bolt

or stud and sufficient metal is added to fill the hole..

The

broken bolt or stud can then be removed with a wrench.

g.

Horizontal Position Welding.

(1) Tee Joints (figure 17, view C, on the previous page).

In

making tee joints in the horizontal position the two plates are

located approximately at right angles to each other in the form

of an inverted T.

The edge of the vertical plate may be tack

welded to the surface of the horizontal plate.

(a) A fillet weld (figure 18, views A and B, on the following

page) is used in making the joint by using a short arc to provide

good fusion at the root and along the legs of the weld.

The

electrode should be held at an angle of 45 degrees to the two

plate surfaces and inclined approximately 15 degrees in the

direction of welding.

(b) Light plates can be fillet welded in one pass with little

or no weaving of the electrode.

Welding of heavier plates may

require two or more passes with the second pass or layer made

using a semicircular weaving motion as shown in figure 18, view

C.

A slight pause is made at the end of each weave to obtain

good fusion between the weld and base metal without any

undercutting.

(c) A fillet-welded tee joint on 1/2 inch or thicker plate can

be made by depositing string beads in the sequence shown in

figure 18, view D.

(d) Chain or staggered intermittent fillet weldings as shown in

figure 19, view A, on page 44 are used for long tee joints.

Fillet welds of these types are used where high weld strength is

not required; however, the short welds are so arranged that the

finished joint is equal in strength to a fillet weld along the

entire length of a joint from one side only. Also, the warpage

and distortion of the welded parts are held to a minimum with

intermittent welds.

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