Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 05, 2021 - September 08, 2021
Drawing is a type of press work that uses punches and dies to create a seamless container-shaped product from a single flat plate. This is used not only for containers, but also for industrial products and machine parts because it can be used to process a variety of cylindrical shapes and square cylinders. In the present study, an attempt was made to form a pure titanium corrugated cup with a structure similar to a corrugated paper cross-section for the forming of lightweight and high-strength functional cups. The test material was commercially available pure titanium, ultralow-carbon steel, and stainless steel. The shape of the blank was a disc with a diameter of 80 to 100 mm. The deep drawing machine used was a hydraulic machine. To form the cup into a corrugated shape, the roller ball die was used. The clad cup was formed by a composite die with a structure consisting of the roller ball die sandwiched between two regular dies. The formability of the drawn cups was evaluated by measuring thickness strain and compressive strength. Load-displacement measurements were also taken to investigate the forming transition. No fracture occurred in the forming of the corrugated cup. The thickness reduction at the bottom of the cup was less than 10 %.
