发明授权
US4906294A Cutting tool produced by sintering a blank formed by a pressing tool
失效
通过烧结由压制工具形成的坯料制成的切削工具
- 专利标题: Cutting tool produced by sintering a blank formed by a pressing tool
- 专利标题(中): 通过烧结由压制工具形成的坯料制成的切削工具
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申请号: US184571申请日: 1988-04-21
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公开(公告)号: US4906294A公开(公告)日: 1990-03-06
- 发明人: Rainer von Haas , Helmut Morbitzer , Jose A. Paya
- 申请人: Rainer von Haas , Helmut Morbitzer , Jose A. Paya
- 申请人地址: DEX Essen
- 专利权人: Fried. Krupp Gesellschaft mit beschrankter Haftung
- 当前专利权人: Fried. Krupp Gesellschaft mit beschrankter Haftung
- 当前专利权人地址: DEX Essen
- 优先权: DEX3713334 19870421
- 主分类号: B22F3/02
- IPC分类号: B22F3/02 ; B22F3/035 ; B23B27/14 ; B30B15/02
摘要:
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).
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