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.
Figure 6 shows the thickness deviation per area and the measurement results for the workpiece after the last (fifth) process.
Table 3 lists the thickness difference between the maximum and minimum points, and the thickness deviation.
The measurement results showed that the thickness distribution was close to the target thickness in terms of the thickness change.
Because the rest would normally be removed by trimming, only the area from the bottom to a height of 2/3 the total height was measured.
At the end of the ironing process, the thickness of the material of the final product, which was 1.4 mm initially, decreased to 1.2 mm.
This confirmed that the product was finished, and there was a greater relative difference in the thickness distribution in the long axis direction.
Point c was found to have the largest deviation between the long and short axes. From the fact that point c had the largest strain as the processes progressed, it can be inferred that a difference in strain can influence the thickness change.
A discrepancy in the prototype and the analysis data showed that the deviation between the long and short axes was around 5%, which was a good result.
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.Figure 6 shows the thickness deviation per area and the measurement results for the workpiece after the last (fifth) process. Table 3 lists the thickness difference between the maximum and minimum points, and the thickness deviation.The measurement results showed that the thickness distribution was close to the target thickness in terms of the thickness change. Because the rest would normally be removed by trimming, only the area from the bottom to a height of 2/3 the total height was measured. At the end of the ironing process, the thickness of the material of the final product, which was 1.4 mm initially, decreased to 1.2 mm. This confirmed that the product was finished, and there was a greater relative difference in the thickness distribution in the long axis direction. Point c was found to have the largest deviation between the long and short axes. From the fact that point c had the largest strain as the processes progressed, it can be inferred that a difference in strain can influence the thickness change. A discrepancy in the prototype and the analysis data showed that the deviation between the long and short axes was around 5%, which was a good result.
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