COMBINED SHEETS OF PLASTIC FORMABLE SHEET AND ULTRA-PLASTIC FORMABLE SHEET, COMBINED TUBES OF TUBULAR PLASTIC FORMABLE SHEET AND ULTRA-PLASTIC FORMABLE SHEET, AND FORMED BODY MADE OF THESE COMBINED SHEET AND COMBINED TUBE

摘要

PPROBLEM TO BE SOLVED: To provide a sheet and a tube, and a formed body made of these sheets or tubes with which a formed product containing a portion needing an ultra-plastic formation and a portion unnecessary to the ultra-plastic formation can be formed at a lower cost and a desired portion can be set in a desired thickness. PSOLUTION: The above tube is a combined tube 18 constituted of the combined sheets provided with a plastic formable sheet 10 and an ultra-plastic formable sheet 12 having sheet thickness different from that of the plastic formable sheet and solid-joined at the edge of a tubular plastic formable sheet. A desired cubic-shaped forming body is constituted by performing ultra-plastic working with a blow-formation by inserting the ultra-plastic formable sheet of the combined tube into a female mold 20. PCOPYRIGHT: (C)2005,JPO&NCIPI