2004 年 45 巻 2 号 p. 319-322
Dense forming of shoulder components through the pulse discharge sintering process was examined. A new technique of multi-way loading system is proposed. This loading system is able to control the pressure in a powder compact body equally even if it has an irregular sectional profile. The traveling zone heating method combined with this loading system will allow the successful sintering of shoulder components through the PDS process, since no sinking due to pressure difference occurs in a powder compact. Based on this idea, the conventional sintering procedure with a perforated spacer was applied to production of a shoulder component. The spacer dictated the loading stroke on the thin side. The result was that an aluminum shoulder component with diameters of φ15 mm at the thin side and φ25 mm at the thick side was satisfactorily produced. The relative density of the component exceeded 99%. Some problems remain to be solved, but this procedure has potential for achieving high reproducibility by developing a precise load control system and stable contact between the electrode and the cylinder.
