ABSTRACT
Part engine repaired process by weld always rises the distorsion at the weld result. The distorsion rise
at the weld result always due a problem that can cause increase the repaired process time and the cost of
work. The distorsion happened at weld result can form in longitudinal direction, transversal direction or
combination. The experiment limited only one direction in transversal direction. The experiment needed to
find the effect of thickness and current toward the distorsion.
This experiment used variable are thickness and current which the thickness used are 8 mm, 13 mm
dan 20 mm and the current used 125 A, 150 A and 175 A then the experiment respon used distorsion. The
design experiment developmented use central composite design (CCD) that arrangerement by software
minitab R14.
The experiment result must be validated statistically by software minitab R14 that will found error
correlation statistically and show process model that explaining correlation between variable process
toward respon. From The matematic model show the thickness give positif contribution toward distorsion but
weld current is decline. So more thickness will be welded can increase distorsion to weld result and more
higher weld current used in weld can decrease distorsion toward weld result.
Keywords : Weld parameter, Distorsion at transversal direction, The weld result.

Analisa Pengaruh tebal dan arus terhadap distorasi arah tranversal pada hasil las