Open Access

Table 10

Regression analysis of variation of the drawing radius in the case of using MMC tool without depression.

Lubrication Initial blankholder pressure Slope of the regression Determination coefficient R 2
With 1.6 MPa y = −157.4x + 1131.2 0.951
Without   y = −238.8x + 1585.5 0.941
With 3.2 MPa y = −205.5x + 1406.8 0.955
Without   y = −319.4x + 2030.3 0.909

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