METHOD OF PRODUCING A ROTATIONALLY ORIENTED THREAD |
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| 申请号 | PCT/EP2014075094 | 申请日 | 2014-11-20 | 公开(公告)号 | WO2015075109A2 | 公开(公告)日 | 2015-05-28 |
| 申请人 | JAGUAR LAND ROVER LTD; | 发明人 | ONLEY BEN; YEOMAN STEPHEN; | ||||
| 摘要 | A method of producing a rotationally orientated thread starting at a desired angular position and suitable for mass production is provided. The method is particularly suitable for improving the angular positioning of spark plugs in car engines. The method involves measuring precisely the length of the tool and the distance, at a particular angular position, of a full thread form of the thread to the tip, so that its start position at the tip can be calculated. Using that distance as an offset of the length of the tool reported to the CNC machine, and starting from its reference position, it commences producing the thread in the bore at the desired angular position of the bore. | ||||||
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| 说明书全文 | |||||||
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