GB615632A - Grinding wheel truing apparatus - Google Patents

Abstract

615,632. Trueing grinding-wheels. NORTON CO. Sept. 6, 1945, No. 22944. Convention date, Nov. 1, 1944. [Class 60] Apparatus for trueing the plane operative face of a grinding-wheel comprises means to locate said wheel in a predetermined grinding position, a trueing tool, a non-rotatable slidablymounted sleeve to support said trueing tool, means to traverse said sleeve in an axial direction to traverse the trueing tool across the face of said wheel, and means rotarily to adjust said sleeve to adjust the position of the trueing tool so as to compensate for wear thereon. The trueing device is described as applied to a grinding machine as described in Specification 615,631, having spaced grinding wheels 16, 17 for operating successively on the top and under surfaces of webs 19 on the workpiece; the grinding wheel slide 14 is moved vertically by piston 21 working in cylinder 20. Downward movement is limited, so as to position the wheel 16 for grinding the top face of the webs, by a sleeve 31, threaded on screwed portion 30 of the piston rod, engaging the upper cylinder end; the sleeve 31 is adjustable axially by a hand wheel 34 having a micrometer adjustment 35 which may be of the construction described in Specification 6784/01, [Class 60], and serving to adjust the grinding wheel so as to compensate for wear thereof. A similar arrangement is provided for limiting the upward movement of the slide 14 so as to position its wheel 17 for grinding the under faces of the webs. The trueing mechanism comprises a frame 60 fastened to the machine column, and a plate 63 pivotally supported thereon by stud 64 and carrying a bearing 70 for a sleeve 72, surrounded by a sleeve 73 supported by bearing 71. Sleeve 73 has an arm 74 carrying a diamond 50 for trueing the under face of the grinding wheel 16, and sleeve 72 has an arm 75 carrying a diamond 51 for trueing the top face of the grinding wheel 17; rotation of the sleeves is prevented by arms 90, 91 secured thereto, engaging a rod 92 slidably mounted in the bearings 70, 71; screws 98, 105 provide rotary adjustment of the sleeves independently of one another to compensate for wear of the diamonds. The sleeves are traversed axially by a hand wheel 80 on a shaft 81 having a screw 82 engaging a nut portion 83 on the bearing 70. In operation, the piston 21 is moved down to bring the grinding wheel 16 to grinding position; the feed wheel 34 is then operated to move the wheel 16 further down by the amount to be removed by trueing; the trueing device is then traversed, the diamond 50 only being operative. The piston 21 is then moved upwardly to position the grinding wheel 17 which after adjustment by its feed wheel is trued by traversing the trueing device, the diamond 51 only being operative. When the grinding wheels have frustro conical faces, the diamonds are caused to travel in the appropriate inclined direction by adjustment of the plate 63 about the pivot 64.