发明名称 |
Spindle unit for a machine tool. |
摘要 |
<p>A spindle unit comprises a tool-cramping device to make more rigid a main spindle (2) of a machine tool and allow it to operate at high speeds. The main spindle (2) is a solid shaft of a very rigid material such as cemented carbide and is supported rotatably in a spindle head (1) by bearings (3) which generate only low heat. A tool-cramping device includes an adapter (8) attached to a front end of the main spindle (2), and a tool holder (12) carrying a rotary tool (10), with one of the adapter (8) and the tool holder (12) comprising a short columnar lug (9), and the other comprising a cylindrical bore which can be shrink-fitted tightly onto the lug (9). The member having the bore (13) therein is made of a material of a thermal expansion coefficient higher than that from which the other member is made. The tool-cramping device further comprises means for heating (14) and means for cooling (15) the member (12) having the bore (13) therein. <IMAGE></p> |
申请公布号 |
EP0437322(B1) |
申请公布日期 |
1994.05.18 |
申请号 |
EP19910300056 |
申请日期 |
1991.01.04 |
申请人 |
KABUSHIKI KAISHA MORI SEIKI SEISAKUSHO |
发明人 |
YAMAGUCHI, YOSHINORI;SHINO, KENTARO;INADA, KIYOSHI;HANAOKA, HIROSHI |
分类号 |
B23B19/02;B23B31/26;B23B31/28;B23P11/02;(IPC1-7):B23P11/02;B23P19/02;B23Q3/12;B24B41/04;B23B31/02 |
主分类号 |
B23B19/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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