| 摘要 |
PCT No. PCT/SE89/00107 Sec. 371 Date Aug. 20, 1990 Sec. 102(e) Date Aug. 20, 1990 PCT Filed Mar. 7, 1989 PCT Pub. No. WO89/09103 PCT Pub. Date Oct. 5, 1989.Apparatus for bending a margin flange (5) which projects at an angle to a surface of a workpiece (4) against that surface, includes a bending tool (6) which is mounted on a tool holder (7) which by a linkage system (8-13) is connected to a stand (1) which carries the workpiece (4). A drive arrangement (15-24) is connected to the tool holder (7) for movement of the tool holder in relation to the stand (1). The linkage system connecting the tool holder (7) with the stand (1) includes two mutually parallel carrier links (8, 11) each of which is pivotally mounted at one end thereof on a respective journal pin (9, 12) located on the tool holder (7). The other end of one carrier link (8) is pivotally mounted on a journal pin (10) which is fixedly mounted on the stand (1) and which also pivotally carries one end of a connecting link (14), the other end of which is pivotally connected to the other end of the other carrier link (11) by a pin (13). The drive arrangement includes a drive member (15, 17) which is fixedly mounted on the stand and connected to said other carrier link (11) for movement thereof and therewith for movement of the tool holder (7). A camming device (25) is driven by the drive member (15, 17) for coaction with a cam follower element (27) which is attached to the first-mentioned carrier link (8) and projects from the other end of the carrier link in a direction away from the tool holder. |
