Study of the Effect of Process Parameters on Surface Profile Accuracy in Single-Point Incremental Sheet Forming of AA1050-H14 Aluminum Alloy

Table 5

ANOVA results for side angle error.

Source	DF	Adj SS	Adj MS	F	value
Main effects	2	9.67	4.83	65.82	<0.01
s	1	2.88	2.88	39.23	<0.01
t	1	6.59	6.59	89.76	<0.01
Residual error	42	3.09	0.07
Pure error	41	3.01	0.07
Total	44
Model summary	R-sq 75.81%	R-sq (adj) 74.66%		R-sq (pred) 72.22%