DEVELOPMENT OF A PROCESS FOR PNEUMATIC EXTRUSION OF METALS.
Abstract
Pneumatic extrusion of metals by means of high pressure nitrogen gas was demonstrated. The advantages of pneumatic extrusion over hydrostatic extrusion are: (1) a more uniform extrusion force, (2) faster extrusion rates, (3) elimination of high pressure combustible vapor, (4) the ability to maintain a cold vessel wall during elevated temperature extrusion. Both pneumatic and hydrostatic extrusion result in a considerable reduction in die friction when compared to conventional mechanical extrusion; indeed at extrusion pressures above 70,000 psi essentially equivalent frictional characteristics exist in the two fluid extrusion systems. Pneumatic extrusion does pose difficulties in extrusion catching and blast shielding. A study is described wherein pneumatic extrusion was used for the extrusion of aluminum and mild steel at pressures to 140,000 psi. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1969
- Accession Number
- AD0687330
Entities
People
- C. K. Cole
- L. A. Finlayson
- R. H. Cornish
Organizations
- IIT Research Institute