Abstract
Flowforming is an incremental forming technique which is used to manufacture seamless tubes with high precision and surface quality. Internal gear flowforming process (IGFP) is an interesting topic in which there is no need for costly tooling and high forming forces. In this research, the formation of internal gears by flowforming and the effects of process parameters on built-up edge are investigated and then optimized. First, the process is analyzed and simulated. Second, several controlled tests are accomplished to verify the simulation results. Third, the effects of feed rate, thickness reduction percentage, attack angle, and roller diameter, on built-up edge are obtained using design of experiments procedure (DOE). Fourth, simulated annealing (SA) algorithm and genetic algorithm (GA) are used for optimizing built-up edge. According to DOE, the most significant parameters affecting the built-up edge are: attack angle, thickness reduction percentage, and feed rate. The built-up edge increases with increasing the attack angle, feed rate and thickness reduction percentage. Optimization results show that the minimum value of the built-up edge is equal to 0.449 mm in SA and 0.445 mm in GA.
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Abbreviations
- IGFP:
-
Internal gear flowforming process
- ALE:
-
Arbitrary Lagrangian–Eulerian
- RSM:
-
Response surface method
- CCD:
-
Central composite design
- ANOVA:
-
Analysis of variance
- DF:
-
Degree of freedom
- SS:
-
Sum of squares
- MS:
-
Mean of squares
- SA:
-
Simulated annealing algorithm
- GA:
-
Genetic algorithm
- VMM:
-
Video measuring machine
- D :
-
Roller diameter (mm)
- T :
-
Thickness reduction (%)
- f:
-
Feed rate (mm/rev)
- α :
-
Attack angle (degree)
- S:
-
Circumferential contact length (mm)
- L:
-
Axial contact length (mm)
- t0 :
-
Initial thickness (mm)
- tf :
-
Final thickness (mm
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Khodadadi, M., Khalili, K. & Ashrafi, A. Optimizing parameters effective on built-up edge in internal gear flowforming process. Sādhanā 47, 99 (2022). https://doi.org/10.1007/s12046-022-01860-z
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DOI: https://doi.org/10.1007/s12046-022-01860-z