The total load decreased as a result of a reduction in the friction area between the die and the material as the punch stroke continued, as in the first process.
The maximum strain in the third process was approximately 2.49, while the average strain was 1.25.
Strain was generated in the area where the ironing process was performed, which was similar to the previous processes, and the bottom surface showed no large change.
With a punch stroke of 56 mm, a maximum load of 1.64 ton was applied. It was verified that the length of the stroke and the maximum load were not significantly different from the values for the previous (second) process.
The maximum strains in the fourth and fifth processes were approximately 2.2 and 3.82, while the average strains were approximately 1.12 and 1.30, respectively.
Because the fourth and the last (fifth) steps involved finishing the final shape, there was no significant strain change.
Similarly, the maximum loads in the fourth and fifth processes were 2.05 and 2.54, which were very close.
Because a large number of wrinkles were generated in the flange area as forming continued, it is expected that a trimming process would also have to be performed to remove them.
The total load decreased as a result of a reduction in the friction area between the die and the material as the punch stroke continued, as in the first process. The maximum strain in the third process was approximately 2.49, while the average strain was 1.25. Strain was generated in the area where the ironing process was performed, which was similar to the previous processes, and the bottom surface showed no large change. With a punch stroke of 56 mm, a maximum load of 1.64 ton was applied. It was verified that the length of the stroke and the maximum load were not significantly different from the values for the previous (second) process. The maximum strains in the fourth and fifth processes were approximately 2.2 and 3.82, while the average strains were approximately 1.12 and 1.30, respectively. Because the fourth and the last (fifth) steps involved finishing the final shape, there was no significant strain change.Similarly, the maximum loads in the fourth and fifth processes were 2.05 and 2.54, which were very close. Because a large number of wrinkles were generated in the flange area as forming continued, it is expected that a trimming process would also have to be performed to remove them.
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