Open Access
Review
Table 4
Regression analysis of variation of the drawing clearance in the case of using bronze tool.
| Lubrication | Initial blankholder pressure | Slope of the regression | Determination coefficient R 2 |
|---|---|---|---|
| With | 1.6 MPa | y = −44.2x + 554.9 | 0.923 |
| Without | y = −45.7x + 601.3 | 0.973 | |
| With | 3.2 MPa | y = −53.2x + 731.9 | 0.991 |
| Without | y = −56.4x + 796.8 | 0.984 |
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