| 摘要 |
1421647 Grinding BRITISH STEEL CORP 15 Oct 1974 [17 Oct 1973] 48349/73 Heading B3D [Also in Division B8] A machine for processing billet or bar stock 21 comprises a machine head 5, a roller mechanism including horizontal table rollers 1 for driving stock into and out of the head, control means for the rate of drive of the stock and the operation of the head, the roller mechanism also including co-operation sets of rolls 8, 9 on each side of the head for gripping the stock, at least one roll 8 in each set and a plurality of other rolls 7 in the roller mechanism aligned therewith having horizontally inclined surfaces to provide edge support for the stock on its leading and trailing ends in dependence on the stock shape. The table rollers 1 are driven and arranged from an input station 2 having a gantry for supporting billets to an output station having two shafts 10, 11 which are independently rotatable and have arms 12, 13 for lifting billets from the roller table 1 for discharge to gantry 3 or pocket 4. The plurality of other rolls 7 and the rolls 8 are arranged along one side of the table on both sides of a grinding head 5 which is movable transversely of the table in a horizontal direction and has a vertically movable slide 19 carrying a grinding wheel 18 and its drive motor 20. The rolls 7 and 8 are mounted on vertical axes, the rolls 7 being idlers and the rolls 8 being driven. The rolls 7 are in the form of discs having inclined surface and the rolls 8 are similar but have a shaft portion for engaging the sides of the billets, a pressure roll 9 on a pivoted arm being provided opposite each pair of rolls 8 whereby the billet is gripped while fed past the grinding head. In operation, the billets are manually discharged from gantry 2 on to the table 1 which is driven from a console at a fast speed until a marked defect is opposite the head and then at a slower speed while the defective part is ground. The inclined surfaces of the rolls 7, 8 gently take up the leading end of the billet to avoid a wave-like motion of the billet during its movement. In the case of a deep defect, a reverse pass may be effected. The finished billet may be discharged to the gantry 3 or pocket 4. The rolls, arms and grinding head may be hydraulically driven. A pneumatic drive may be used for the vertical movement of the grinding wheel to control the grinding load. |
