Aluminum bar and production method thereof
a production method and technology of aluminum bars, applied in the field of aluminum bars and production methods, can solve the problems of poor appearance of the final product after cutting, new damage to the surface of the other bar, and damage to the peeling step, so as to achieve the effect of high quality forged products and good surface condition
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example 1
[0091]The aforementioned cut aluminum alloy bar was subjected to a surface pressing process (straightening process) using a roll straightening machine similar to the machine shown in FIG. 1A and FIG. 1B to obtain an aluminum alloy bar of Example 1. For the conditions of the straightening process, the roll angles Rα and Rβ (see FIG. 1A) were set to 14° (degrees) and 14° (degrees), the rolling load was set to 2.0 ton (2.0×103×9.80 N), and the roll rotational number was set to 1,200 rpm.
[0092]Further in Table 1, the pressing force corresponding to the rolling load is shown as a ratio when the straightness saturation point (straightening degree saturation point) at the rolling load of 0.5 ton (0.5×103×9.80 N) is “1”. Furthermore, the pressing points “Fa” to “Fd” in Table 1 show that they correspond to the pressing points “Fa” to “Fd” in the graph of FIG. 2, and Example 1 corresponds to the pressing point “Fa” in the graph of FIG. 2.
[0093]Further, when the load curve of the surface of th...
example 2
[0100]For a cut aluminum bar, the rolling load was set to 1.0 ton (1.0×103×9.80 N) (the pressing point corresponds to Fb of FIG. 2), and other than that, a surface pressing process (straightening process) was performed under the same pressing process conditions as the aforementioned Example 1 to obtain an aluminum bar of Example 2. The load curve parameter tan(Pθmin) of the aluminum bar was 0.38.
[0101]Furthermore, as shown in Table 1, also for the aluminum bar of Example 2, all evaluations were good after performing the same evaluations as above.
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