Abstract
Single-point incremental forming (SPIF) is a rising technology used shaping sheet-metals. The emergence of this manufacturing process is due to its capability to produce parts with complex shape at lower cost. The present contribution is focused on the presentation of a new designed rolling ball forming tool that can improve (SPIF) operations. For that, the effects of process working parameters on a set of process qualification criteria when forming of AA1050 aluminum alloy sheets is presented. Deep analyses treating impacts of tool step down, tool rolling ball diameter, and tool feed rate on the process responses such as forming axial forces, surface roughness, and sheet thinning are made. The analysis is based on statistical methodologies which made it possible to establish, using the multiple regression method, predictive analytical models for the different responses.
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Abbreviations
- ANOVA:
-
Analysis of variance
- D:
-
Rolling ball diameter (mm)
- Df:
-
Degrees of freedom
- F:
-
Tool feed rate (mm/min)
- Favr :
-
Average axial forming force (N)
- Fmax :
-
Maximal axial forming force (N)
- Fz :
-
Axial Forming force (N)
- F-value:
-
Fisher test value
- ISF:
-
Incremental sheet forming
- MS:
-
Mean squares
- PC%:
-
Percentage of contribution (%)
- P value:
-
Value of significance
- RSM:
-
Response surface methodology
- R2 :
-
Determination coefficient
- R2adjusted :
-
Adjusted determination coefficient
- R2predictif :
-
Predictive determination coefficient
- Ra :
-
Arithmetic mean roughness (μm)
- Rz :
-
Mean peak-to-valley height (μm)
- Rt :
-
Maximum profile height (μm)
- SPIF:
-
Single-point incremental forming
- SS:
-
Squared deviations
- SSD :
-
Sum of squared deviations
- SST :
-
Total sum of squared deviations
- ΔZ:
-
Vertical step down (mm)
- ϕ:
-
Wall angle (degree)
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Kilani, L., Mabrouki, T., Ayadi, M. et al. Effects of rolling ball tool parameters on roughness, sheet thinning, and forming force generated during SPIF process. Int J Adv Manuf Technol 106, 4123–4142 (2020). https://doi.org/10.1007/s00170-019-04918-1
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DOI: https://doi.org/10.1007/s00170-019-04918-1