Edge Bent up Model
Figure 4 shows the edge bent up model. The equation when AD and BC are the same length is:
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| Fig. 4 shows Edge Bent Up Model. Fig. 6 shows an Arc Edge Bent Up Model. Fig. 8 shows an Arc edge Bent Down Model. |
For example, assume the width of channel side L is 0.800 in., and the channel side is formed 17 degrees at the first pass. The elevation of the entrance guide H should be calculated by Equation 2 as the edge bent up model.
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The elevation of the entrance guide H, then, should be 0.120 in.
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Figure 5 is a table of coefficient (H/L) for the edge bent up model. For example, assume the width of channel side L is 0.800 in., and the channel side is formed 25 degrees at the first pass. From Figure 5, when the forming angle a is 25 degrees, the coefficient (H/L) is 0.222.
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The elevation of the entrance guide H, then, should be set to 0.178 in.
From Figure 5, when the forming angle a at the first pass is 90 degrees, the coefficient (H/L) is 1.000. The elevation of the entrance guide H should be L (H = L) in. in height.
Arc Edge Bent up Model
Figure 6 shows the arc edge bent up model. The equation when AD and BC are the same length is:
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For example, assume the forming angle is 17 degrees, with a 0.500-in. radius at the first pass. The elevation of the entrance guide H should be calculated by Equation 3 as the arc edge bent up model.
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The elevation of the entrance guide H, then, should be 0.011 in.
