Drum for winding and unwinding of cold-rolled strips

摘要

825,727. Winding and reeling. SCHLOEMANN A.G. Sept. 23, 1957 [Sept. 28, 1956; Aug. 1, 1957], No. 29791/57. Class 83 (4). [Also in Group XVI] An expansible winding drum, especially for winding on and unwinding cold rolled strip, comprises a plurality of radially expansible segments 12 actuated by inclined surfaces 14 on an axially movable body 1 and inclined surfaces 5 on the body 1 co-operating with closure members 4 which close the drum periphery when the drum is expanded, the inclination of the surfaces 5 being greater than that of the surfaces 14. As shown, the body 1 is keyed to a hollow shaft 3 to permit relative axial movement between the shaft 3 and body 1. The surfaces 5 are formed by thrust pieces 6 of wearresistant material, while the closing members 4 run on rollers 7 rotatably mounted on the members 4. When the drum is contracted, the members 4 are held in retracted positon, within spaces between the segments 12, by springs 8 on bolts 9 mounted in grooves 10 in the body 1. The inclined surfaces 14 are formed with dovetail grooves 13 in which the segments 12, formed with inclined surfaces 15, are relatively slidable. The outer end of a piston rod 23 is connected by a cover 23a to the body 1, such that actuation of the piston rod 23 causes axial movement of the body 1 to effect expansion of the segments 12. The right-hand end of the shaft 3 is rotatably mounted in a bearing, not shown, but prevented from moving axially. The piston rod 23 carries pistons 20, 21, Fig. 5, slidable in an internally stepped cylinder 22. The piston 21 is fixed to the rod 23 and the piston 20 is axially movable on the rod 23. The piston 20 is actuated by oil supplied, under pressure, through a bore 24 such that it moves axially into engagement with a step 26. In this position of the piston rod 23, the segments 12 and closing members 4 are in the expanded position shown in Fig. 4 in which the drum is used for winding strip. The piston 21, Fig. 5, is actuated by oil supplied, under pressure, through a bore 27 to effect further movement of the piston rod 23, thereby causing further expansion of the segments 12 only into the Fig. 4 position, not shown, in which the drum is used for unwinding strip. The piston 21 is returned to its left-hand position by oil supplied, under pressure, through a bore 29. The leading end of a strip to be wound may be clamped between one of the members 4 and the adjacent segment 12. In a modification, one of the closing members 4a, Fig. 7, has a recess 16 carrying a wedgeshaped clamping shoe 16a resiliently mounted by springs 17 on the member 4a to permit clamping strips of varying thickness. Screws 19 pass through elongated holes 18 in the shoe 16a. The shoe 16a is fluted on the side facing the segment so as to grip the leading end 90 of a strip firmly. In a further modification, members having inclined surfaces are axially slidable by a piston rod connected thereto. The inclined surfaces engage similar surfaces on members secured to a fixed sleeve surrounding the piston rod. Actuation of the piston rod effects expansion and contraction of the drum segments. Closure members, fitted in recesses between the segments, are actuated in a similar manner, the inclination of their actuating members being greater than the inclination of the members actuating the segments.