Figure 2-2 Repair steps for severely distorted plates

TM 5-5420-279-23

(1)

Preparation for Straightening

(a)

Clamp the relevant component onto a steel table.

(b)

Mark out position of the centerline through distorted area on both sides of the

plate.

(c)

Mark out witness lines 1/2 in (12.7 mm) past the extent of the distortion, on

both sides of the centerline and on both sides of the plate.

(d)

Cut through the centerline leaving a slot of sufficient width to enable

straightening of plate (fig.2-2(b)).

(e)

Hand grind weld preparation on cut, to achieve the included angle described

in the weld procedure (Sections 5 and 6) when the plate has been straightened (figs.

2-2(c) and (d)). Note should also be made of the required toe depth for each weld

configuration.

For steel components no heat treatment is required prior to straightening and the repair

procedure should be continued at paragraph (2). Straighten the plate.

CAUTION

For Aluminum components, if the temperature is raised above 470oC (878oF),

component must be scrapped. (The 450oC - 470oC (842 - 878oF) band is a safety

margin). This is specifically for Aluminum alloys.

Appendix K Page 8