Accession Number:

AD0432044

Title:

OPPOSED ANVIL BASIC DESIGN CONSIDERATIONS,

Descriptive Note:

Corporate Author:

AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s):

Report Date:

1963-12-01

Pagination or Media Count:

32.0

Abstract:

Optimum design of opposed anvils depends on analysis of stress distribution, geometry, and material strength as well as on such exceptional considerations as limitations imposed by apparatus application. Thirty years of reviewed experience using opposed anvils suggests that 6 percent cobaltbonded tungsten-carbide inserts shrunk-fit into high-strength heat-treated binding rings yield best results if low cone angles 4 degrees to 6 degrees, slight insert tapers 1 degree, moderate interference 0.75 percent on the diameter, and moderate heat treatments are used. Sample pressures as high as 400 kb are possible for low temperatures whereas pressures of 50 kb and 1000 C may be developed routinely in well designed opposed anvils. Bridgman-type opposed anvils used in a 50-kb 1000 C shear press developed at AFCRL incorporate Carmet CA3 6 percent cobaltbonded tungsten-carbide inserts and Vascojet 1000 CVM forging binding rings with cone tapers of 15 degrees, side tapers of 1 degree, and interferences of 0.5 percent on the diameter. Maximum temperatures require Kennametal Kentanium K162 B inserts. Accompanying tables indicate physical properties for typical insert and binding ring materials. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE