WAVY AGRICULTURAL TILLAGE BLADE WITH SHARPENED EDGE |
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| 申请号 | EP13890580 | 申请日 | 2013-09-26 | 公开(公告)号 | EP3027339A4 | 公开(公告)日 | 2017-05-31 |
| 申请人 | BRUCE DOUGLAS G; | 发明人 | BRUCE DOUGLAS G; | ||||
| 摘要 | A method of making a tillage blade by obtaining a generally circular sheet metal steel disc having an outer peripheral edge. Waves are made in the outer peripheral edge of a circular steel disc in a predetermined pattern while the steel is cold. The outer peripheral edge is then sharpened at a predetermined acute angle with respect to a first plane by grinding. Then the disc is heat treated to make it harder so it will wear longer. If it is desired to have a concave/convex disc, instead of a coulter, then during the heat treating process the disc is deformed so that the sharpened portions of the peripheral edge remain generally in the first plane but a central portion of the disc is disposed at least partially in a second plane which is parallel to but spaced from the first plane. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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