Patent GB-919099-A (GB)
Title: Apparatus for honing elongated bodies of circular cross-section
IPC: B24B21/00
Filed: 1960-11-14
Abstract: 919,099. Honing tapered rollers &c. SLOAN, T. H. Nov. 14, 1960 [Nov. 23, 1959], No. 39036/60. Class 60. [Also in Group XXX] Apparatus for honing elongated bodies of circular cross-section includes a honing head for carrying abrasive honing material, which head is mounted on a fixed frame support by a plurality of parallel vertically-aligned links for oscillatory up-and-down movement relative to the surface of a body being honed and is arranged to rest on a vertically-reciprocable movable support member, means being provided to reciprocate said support member so as to raise and lower the honing head whereby the honing material carried thereby is brought into intermittent honing engagement with the surface of the body being honed. A machine table 1 is supported on frames 2 having jack screws 3 for adjusting the level of the table. A workpiece 80, e.g. a tapered roller for roller bearings, is disposed between drive-wheels 81, 82 mounted on shafts 83, 84 driven in the same direction through belt or chain by a motor 256. The shafts are journalled by anti-friction bearings in brackets 88, 89 mounted on a base 90 bolted to the table 1, alignment of the base 90 with the honing head being maintained by keys 92, 92a. The bracket 89 is mounted between centres 96, 97, its endwise position being adjustable by screws 98. A stop-plate 93 adjustably secured to the bracket 89 by screws 94, 95 cooperates with a fixed abutment. A cam follower roller 100 is mounted in a block 100a having a shank 100b fitting into the bracket 88, the block being adjusted by a set-screw 100d and secured by a screw 100c. The bracket 88 is biased by a spring 101 to hold the roller 100 in contact with a cam 99 mounted on a spindle 106 slidable in bearings 107, 108. When the cam 99 moves the wheel 82 away from the wheel 81 the workpiece 80 drops into a receiving receptacle. One end of the spindle 106 has a hardened screw 109 abutting an adjustable set-screw 110 to limit forward movement of the spindle 106. The other end of the spindle has a bracket 111 and a collar 112 for receiving rollers on a yoke of a lever 116 for reciprocating the spindle 106. The lever 116 is pivoted at 216 to an arm 217 extending from the table 1 and has a follower 221 held against a cam 218 by a coil spring 226 connected between an adjusting screw 229 and an extension 222 of the lever 116, the extension co-operating with an adjustable stop 223. The cam 218 is mounted on the output shaft 219 of a planetary gear reduction 252 belt-driven by a motor 254. A bracket 117 connected to the spindle 106 carries a pin 118 and a spring-loaded plunger 119. The bracket 111 carries a finger 120 having an adjustable screw 121 engaging one arm 122 of a bell-crank lever pivoted to the frame of a feed shoot 124, the other arm 125 having a depending member 126. A roller 128 normally limits upward movement of the arm 125 but can be displaced axially against the action of a spring to allow the arm 125 to be raised to facilitate inspection of the receiving station and removal of a roller if the feeding mechanism jams. The shoot 124 has a slotted bore 132 through which the rollers 80 are fed. As the pin 118 moves with the spindle 106 rearwardly a roller 80 resting on the pin is released to drop on a support 133. On subsequent forward movement of the pin 118 and spindle 106 the roller 80 is pushed on to the anvil 127. During rearward movement of the spindle 106 the plunger 119 strikes the arm 122, causing the member 126 to push the roller 80 down on the support 133 after full retraction of the pin 118. During subsequent forward movement of the spindle 106 the screw 121 contacts arm 122 raising the member 126 to permit another roller 80 to pass from the feed shoot bore 132 to the top of the pin 118. The support 133 and anvil 127 are bolted to the base with which they are aligned by a key 139. In a modification. Fig. 20, the anvil 127 is replaced by a bracket 137 mounting a roller 135. A base 4 horizontally adjustable on the table 1 has secured thereto a frame 7 to which a plate 14 is secured by links 9 mounted by pre-loaded anti-friction bearings in ears 11, 12 of the plate 14 and in the walls of the frame 7. The honing head 8 is secured to the plate 14 by bolts 15, segmented slots 16 permitting angular adjustment of the head and a scale being provided for indicating the extent of such adjustment. The honing head is supported by a screw jack having an adjustable screw 41 engaging a roller 42 mounted between the ears 12. The screw 41 is mounted on a vertically reciprocated plunger 45. A cam 47 on the same shaft 219 as the cam 218 engages a follower 48 on one arm of a bellcrank 49, the other arm of which has a counterweight 50 suspended from a rod 51 for adjusting the honing pressure. The bell-crank 49 is mounted on a sleeve 236 carried by plugs in a bracket 235 bolted to the table 1. Rocking of the sleeve 236 is transmitted by an arm 237 to a roller 46 on the lower end of the plunger 45. The honing head has a shuttle bar 19 which is reciprocated by an eccentric shaft 24 beltdriven by a motor 255 and carrying a flywheel 26 bored at 27 for desired counter-balance. The eccentric drive is contained in a chamber filled with lubricant ; a cover member 36 has a window 37. A block 28 is mounted on an extension of the shuttle bar 19. A sleeve 29 slidably mounted in the honing head has mounted therein a shaft 31 connected by a tongue-and-groove coupling 32 to a shaft 33 provided with a ratchet-wheel 34. The latter is engaged by a pawl on an arm 61 having an arm co-operating with a stop 63 on the frame 7 so that at each vertical reciprocation of the honing head the shafts 33, 31 are incrementally rotated. A cross-bar 52 on the honing head supports tape reels 53, 54. The honing tape 67 from a roll mounted on the reel 53 passes over a guide-wheel 55 mounted on a stub shaft extending from a part 57 mounted on the end of the shuttle bar 19. The tape then passes over a honing shoe 69 and then over an intermittent-feed wheel 58 having a knurled surface and driven by a pinion 59 on the end of the shaft 31. The tape then passes to the reel 54 which is driven by a belt 72 from a pulley that rotates with the shaft of the feed-wheel 58. The tape is tensioned by rollers 74, 75 mounted on a spring loaded cross-bar 76. The honing shoe 69 comprises an arm 200 mounted on the block 28 and terminating in a tongue 201. Side-plates 202, 203 are joined by a rivet or screw 204 and between them is the shoe 205 which has a V-groove 206. The tips 207, 208 are serrated. The shoe 205 is held by a pin 212 smaller than its bore 213 and the top face of the shoe has clearances 214, 215; thus a teetering movement of the shoe is allowed to render it self-aligning with the work surface. The degree of teetering is controlled by the clearances 214, 215 and may further be controlled by the reciprocatory motion of the shoe across the work surface transversely of the direction of rotation of the workpiece. This motion produces a crown on the work surface which may be useful in controlling the noise of a bearing operating at high speed. The teetering motion may be subdued by placing a resilient pad between the shoe 205 and the tongue 201. An end face 80a of the roller 80 may be honed simultaneously with the honing of the periphery, a honing tape 140 being pressed against the end face by a honing shoe 141. The honing tape 140 from a roll carried by a reel 142 passes over a grooved guide roll 144, a guide roll 147, a stationary cylinder 141 constituting the honing shoe and a knurled intermittent-feed wheel 158 and thence to a reel 165. The reel 142 is mounted on the hub of a shaft mounted in a plate 177 mounted on a fixed column having a reduced portion secured in an opening of a boss of the table 1. The guide roll 144 is mounted on a pin 176 secured in the plate 177; a coil spring 179 acts through a collar 180 on a friction disc 180a to act as a drag on the roll 144 to keep the tape taut, the spring pressure being adjustable by a nut 182. A roll 145 loaded by a spring 146 keeps the tape in the groove of the guide roll 144. The guide roll 147 is mounted on a bracket 148 carried by a sleeve 149 supported on a boss 150 of the table. The honing shoe 141 is mounted on a bracket 169 adjustable by a screw 170 and secured in adjusted position by a bolt 171. A wheel 161 on an arm 162 loaded by a spring 163 presses the tape against the feed-wheel 158, the latter being carried by a shaft 152 extending through the sleeve 149 and driven intermittently through a coupling 155 by a speed reducer mechanism 156. The reel 165 is driven by a belt 168 from the shaft 152. The arm 237 which reciprocates the honing head 8 vertically actuates an arm 241 pivoted at 244 to a bracket 245 extending from the table 1, the arm being loaded by a spring 240 and carrying a pawl 242 operating a ratchet-wheel 243 on the input shaft of the speed reducer mechanism 156, so that the honing tape 140 is advanced incrementally at each reciprocation of the honing head, i.e. at each application of the tape 140 to the end face 80a of the roller 80. A pump 251 supplies honing fluid to the working zone, the fluid returning from the table top through a drain 249 to a sump 250.