Research Project
Grant-in-Aid for Young Scientists (B)
A forming method utilizing a punch having an internal channel for supplying liquid lubricant to the punch nose was proposed. (1) the proposed forming method was applied to forming of pure titanium specimen using a servo press. The formed titanium specimen with formed hole depth/diameter of 2.0 was successfully obtained in the proposed forming method with appropriate pulse punch ram motion. (2) the proposed forming method was found to produce the formed holes with high shape accuracy. The shape accuracy of the formed hole was discussed with experimental and finite element simulation results in terms of lubrication state and temperature change. (3) The proposed forming method with pulse punch ram motion was applied to combined forward-backward extrusion process with a high height/diameter ratio. The coefficient of shear friction at the specimen–punch interface was identified from the material flow of the aluminum specimen during the extrusion with pulse punch ram motion.
All 2014 2013 2012
All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (12 results)
Journal of Materials Processing Technology
Volume: 214巻 Issue: 4 Pages: 936-944
10.1016/j.jmatprotec.2013.11.017
Volume: 213巻 Issue: 5 Pages: 770-778
10.1016/j.jmatprotec.2012.11.023
