Deep Drawing of Commercially Pure Titanium Sheets

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概要

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• The technology of deep drawing of commercially pure Ti cold-rolled sheet for obtaining drawn cup without defects was developed. Oil hydraulic press of 490 kN punch force and 98 kN blank holding force (BHF) and 300 mm/min drawing speed were used. Ti sheets (TP28C) of 0.8 mm sheet thickness (<I>t</I>) were used. The punch diameter is φ40 mm, and various radii were used. <Br>First, blanks lubricated with machine oil were deep drawn. BHF values were calculated by Dr. Fukuis formula. The limiting drawing ratio (LDR) was about 1.8, inferior to steel sheets. <Br>Next, two 30 μm polyethylene (PE) films were used on each side of Ti sheet and BHF values were calculated by Dr. Fukuis formula. When LDR increased to <I>e.g</I>. 2.5, large and numerous wrinkles were found. By BHF increasing to 98 kN, only traces of wrinkles were found.<Br>Last, punch lubrication was eliminated. The LDR increased to 2.6, but severe earing was formed. <Br>By the consideration of characteristics of test piece of each direction, the breaking mechanism was qualitively explained. By adequate blank shape, this earing was nearly eliminated.

著者

• AKAMATSU Taisuke

  Kogakuin University

• Ukita Shizuo

  Department of Mechanical Engineering, Kogakuin University

• Miyasaka Katsutoshi

  Department of Mechanical Engineering, Kogakuin University

• Shi Meng

  Graduate Student, Kogakuin University

関連論文

• Effect of Welding Speed on Oxygen and Nitrogen Contents in SAW Metals
• Oxygen and Nitrogen contents of Multilayer Weld Metal by Submerged Arc Welding
• Submerged Arc Welding in the Ar-N_2 Mixture Gas Atmosphere : Various Gas Atmosphere Report 3
• Oxygen and Nitrogen Contents of three Welding Stage Metals by Submerged Arc Welding in Argon Atmosphere
• Effect of Eccentricity of the Coating upon the Deposition of Weld Metal
• Deep Drawing of Commercially Pure Titanium Sheets

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