| 摘要 |
<p>There is provided a method of making a compression die set of the type including front and back die pieces for compressively forming a sheet of soft, pliable metal, such as superplastic metal, therebetween with one of the die pieces including surface impressions. This method includes the steps of providing a mass of metal in a superplastic state, placing a sheet of the soft, pliable metal corresponding to the sheet to be formed over the one die piece to cover the surface impressions, heating the mass of superplastic metal to an elevated forming temperature, and forcing the mass toward the sheet and the one die piece until the sheet flows completely into the surface impressions.</p> |
