20th International Forgemasters Meeting - IFM 2017

FUJI OOZX Inc. (OOZX), who are pursuing their global growth in the field of automobile engine valve production, further improving quality of the valves, had installed the world's state-of-the-art Multi-functional Hydraulic Press that made it possible to make wide variety of forging. This report describes the characteristics of the state-of-the-art equipment and of the effect of quality improvement. Mitsubishi Nagasaki Machinery Mfg. Co., Ltd. (MNM), based on the findings and knowledge from the 5-axis (up-down/right-left axis) multi-way hydraulic press we delivered some years ago, had introduced the newest hydraulic servo-control technology and delivered the Multi-functional Hydraulic Press to OOZX. The characteristics are:

1. Quality improvement and extension of die life by forging speed differences in engine valve hot forging procedures
   • In one pressing operation of multi-way press, a forging speed difference between forging of 1st procedure and those of 2 - 3 procedures is realized.
   • Together with deformation amounts of respective procedures, forging speeds (distortion speeds) are also controlled, making quality aspect better and die life aspect improved.
2. Suppression of burr development in forging by continuous "vibrating" forging　
   • Using hydraulic servo control on 1-axis, "vibrating" forging is realized.
   • By vibrating forging, improving lubricity between die and work contact part, smooth deformation plasticity was realized, and burr development is reduced.
3. Using hydraulic press, cycle time 3 seconds/1 piece realized.
   • In order to match the cycle time of the previous screw press, by adapting special structure cylinders on the hydraulic press, the operation speed compares well with that of a screw press.

By installation of the newest machine, not only extension of die life, but also manufacturing of engine valve with further improved quality is now made possible. By that quality improvement, increase of OOZX's share in the world is expected.