Open Access

Table 11

Regression analysis of variation of the drawing radius in the case of using MMC tool with depression.

Lubrication Initial blankholder pressure Slope of the regression Determination coefficient R 2
With 1.6 MPa y = −145x + 1275.7 0.983
Without   y = −215x + 1695.1 0.984
With 3.2 MPa y = −197.2x + 1553.2 0.999
Without   y = −254.4x + 1940.5 0.982

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