Cutting tool produced by sintering a blank formed by a pressing

Details Cutting tool produced by sintering a blank formed by a pressing Cutting tool produced by sintering a blank formed by a pressing

1988-04-21

1990-03-06

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

175409, 299 79, 419 38, 419 66, G22F 100

Patent

active

049062948

ABSTRACT:
A cutting bit (1) has a bottom side (2), flanks (3) that are inclined at a positive clearance angle (.alpha.) with respect to the bottom side (2), and a top side (7). The top side (7) has cutting edges (5 and 5') which are inclined with respect to one another at an angle of inclination (.lambda.). The cutting bit is made by sintering a blank which is formed using a pressing tool (10). The pressing tool includes a mold member (11), an upper die (12), and a lower die (13). The upper die (12) has a pressure face (20) which corresponds precisely, except for an allowance for the shrinkage ratio of the sinter material, to the actual surface of the upper side of the cutting bit (1). When the upper die (12) is fully inserted into the mold (11), a free space (31) exists between the upper die (12) and the mold member (11), the free space being disposed above the delimiting line (21) of pressure face (20) of the upper die (12).

REFERENCES:
patent: 2747231 (1956-05-01), Reinhardt
patent: 4189265 (1980-02-01), Arnold et al.
patent: 4298563 (1981-11-01), De Santis et al.
patent: 4397889 (1983-08-01), Benjamin et al.
patent: 4478888 (1984-10-01), Benjamin et al.
"Indexable turning inserts with chipbreaker grooves," Krupp Widia Technical Information, HVT88.524, published Sep./Oct. 1988, pp. 1-8.
"Wendeschneidplatten mit Spanformgeometrien," Krupp Widia Technische Information, HVT88.024, published May/Jun. 1988, pp. 1-8.

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