GB322142A - Improvements in roll grinding machines - Google Patents

Abstract

322,142. Williams, H. R. Dec. 10, 1928, [Convention date]. Rollers, treating; wheels and other tools.-In a machine for grinding long heavy rolls such as calender rolls, the roll 1 is supported and rotated in a substantially upright position while a grinding-wheel is traversed longitudinally along the roll, automatic means being provided to vary the distance between the grinding-wheel and the roll axis so as to impart the required camber to the roll. The roll is supported on a ballbearing spindle 2 carried by the base 5 and driven by worm-wearing 6. The upper roll-end is supported in a bearing 7 adjustable in a fixed arm 8. The grinding- wheel which preferably consists of a number of separate discs 9 - - 11 is mounted on a sleeve 12 in a carriage 13 and is belt driven from a motor 15. Traversing movement is imparted to the carriage by a vertical screw 16 driven by worm gearing 21, the carriage being guided during this movement by a frame 22 pivoted about the axis of the screw 16. In order to impart the required camber to the roll, the frame 22 is swung by gearing operated from the grinding-carriage so that the grinding-wheel recedes from the roll axis as the middle of the roll is approached and is then moved towards the roll axis until the roll end is reached. For this purpose the grinding-carriage is secured to a chain 26 running over sprockets 27, 28, the shaft of the sprocket 28 being connected by a chain 29 and worm-gearing 32 to a cam 34 engaged by a roller mounted on a link 36 pivoted to the guide frame 22. The link 36 is provided with lugs to accommodate a nut 40 carried on a screwed link 42 to provide adjustment of the grinding-wheel radially of the work. The cam 34 is designed so that the movements of the guide frame imparted through the link 3 are such as to give the required camber to the roll. For grinding the ends of the roll the chain driving the cam 34 is disconnected from the grinding-carriage and the grinding-wheel is moved up to the work by means of the nut 40. In a modification, Fig. 4, the guide 102 for the car- .riage is movable about a central horizontal axis 103, this movement being produced bv a cam 129 driven from the chain connected to the grinding- carriage through a belt 125 and worm-gearing 127. The traversing-screw is mounted in the guide and is driven from a splined shaft 111 through wormgearing 112. In order to allow the grinding-wheel 134 to be moved towards the roll for grinding the end portions, the wheel is mounted in a yoke 135 which can swing about a vertical shaft 136 mounted in the carriage. Adjustment of the yoke is effected by means of a link 142. The drive is conveyed from the motor 146 through belts 149 and 152 so that the drive is not disturbed by adjustment of the grinding-wheel. In a further modification, Fig. 7, the grinding carriage moves on a fixed guide 201 and the roll is mounted on a frame 221 carried on a hemispherical bearing 223 and guided at its upper end at 225. The roll frame is rocked during the traversing of the grinding-carriage by means of a cam 219 driven from the chain 208 attached to the grinding- carriage through a chain 212 and worm-gearing 217.