Regression analysis of variation of the drawing radius in the case of using bronze tool.
|Lubrication||Initial blankholder pressure||Slope of the regression||Determination coefficient R 2|
|With||1.6 MPa||y = −87.9x + 710.2||0.974|
|Without||y = −82.1x + 742.43||0.983|
|With||3.2 MPa||y = −126.7x + 949.4||0.994|
|Without||y = −142.8x + 1058.9||0.973|
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