| 摘要 |
1294296 Stamping; metal feeds GULF & WESTERN INDUSTRIAL PRODUCTS CO 27 Jan 1970 [28 Jan 1969] 3958/70 Headings B3Q and B3W [Also in Division B8] A work handling assembly for transferring workpieces from one work station to another comprises a movable arm 18 on which is mounted a cam 34, Fig. 2, operating a gripper E, the cam being guided on the arm and operated by a piston 28, the cam 34 has opposed cam surfaces which act on two cam followers 56, 58 on spaced apart arms 42, 44 to close jaws 60, 62 on a workpiece W. The jaws have spring-loaded pads 64, 66 which engage the workpiece. The cam has four sides, two of which are cam surfaces 35, 36, and the other two having grooves 76 which co-operate with ribs 74 on the arm 18 to guide the cam. The grippers are opened by a spring 72 and stops 68, 70 limit the extent of opening. The cam may cause only one jaw to move, or may be designed so as to raise or lower the workpiece after the jaws have closed on it. The arm on which the gripper is mounted is preferably mounted on a rotatable housing which carries four such arms radially at right-angles to each other. The arms may be raised and lowered relative to the housing and also extended and retracted with respect to it. The work stations are preferably presses which may be for blanking, forming, drawing or coining. |
