Abstract
The improvement of weight scattering and dimensional tolerance for the purpose of net-shaping is an important issue in the manufacturing of automotive PM parts. To resolve this issue, an aeration powder filling method was developed.It was clarified that the aeration powder filling method is effective in filling the thin and complex-shaped cavities uniformly and quickly.Consequently, the aeration powder filling method has been applied on the actual compacting press to examine the dimensional tolerance with cup-shaped test pieces. The decreasing of the weight scattering, the uniform density, the improvement of dimensional tolerance, and the reduction in the filling time were confirmed.
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