Autonopedia

A

The ring is to be welded on to a shank in Lesson 33, so extra metal must be left in the first weld to form the scarf for the later welding operation.

Using the above formula, calculate and cut off the material required.

Take a NEAR WELDING heat on one end and, holding the bar vertically with the hot end on the anvil face, upset the end by striking the top as shown here -

B

The middle of the bar will buckle slightly.

After every two or three upsetting blows on the top, straighten out the buckle in this way -

Heat the other end and upset in the same way.

C

Take a BRIGHT RED heat and form the ring over the bick, leaving the ends for scarfing like this -

D

At a NEAR WELDING heat, using the corner of the anvil to give the required offset, form a scarf at each end on opposite sides so that they pair up when laid over each other.

E

Set the scarfs down tight like thisThen dress up the joint over the hick with light hammer blows.

F

Take a FULL WELDING heat and weld first on the face of the anvil like this -

As soon as the weld feels solid, transfer the ring to the bick of the anvil.

G

Finish the weld over the point of the bick like this -

Note the extra metal left in the weld.

This and the preceding operation must be done in the same heat, so work quickly.

H

Cut off the required amount of metal from a ½" square bar.

The ends must be upset before bending and scarfing as described for the small ring made in the first exercise in this lesson.

Set the scarfs together on the anvil face and align the ends on the hick as shown here.

Weld as before.

J

By this time the student should be practised enough to weld a ring from ^3/8" round without upsetting the ends.

Calculate the amount of metal and cut off the required piece.

Bend the ring into shape and form the scarfs on the plain ends like this -

Make sure they are on opposite sides.

K

Set the scarfs together and align the ends thus -

Then weld as in the previous exercises.