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Review
Table 7
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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