| 摘要 |
1,205,580. Grinding; bar-stock feeding. SUNDSTRAND CORP. 29 Dec., 1967 [30 Dec., 1966], No. 59233/67. Headings B3B and B3D. A bar loading apparatus for successively separating stock bars from a supply and delivering them to the bar feeder of a machine tool, such as a centreless grinder, automatic screw machine or turret lathe, comprises a rack 20 for supporting a supply of bars and inclined downwardly towards the feeder which consists of a row of spread apart pairs of power-driven rolls 43, 44 and the rolls of each pair being spaced apart laterally and adjustable to receive bars of various diameters, a series of load levers 63 fixedly mounted in spaced relation along a shaft 30 journalled for oscillation about an axis parallel to the bars in the supply, the levers being movable between an up position forming a continuation of the rack and a down position for placing a bar on the rolls of the bar feeder, and a series of stop levers 70 and retaining levers 73 movable alternately between up and down positions by power means 88, 96 for releasing the bars successively from the supply on to the load levers. The rack consists of a number of beams 20 ... 24 joined at their rear end by a member 25 and at their forward ends are mounted by bearings 27 on the shaft 30 about which the rack is adjustable to vary its inclination by fluid-operated cylinders. The load levers 63 are fixed to the shaft 30 which is oscillatable by a fluid-operated cylinder 112 to move the levers between their upper and lower positions. The stop levers 20 are fixed to a shaft 71 oscillatable by a fluid operated cylinder 26 and the retaining levers 73 are fixed to a shaft 74 oscillatable by a cylinder 88. The cylinders 88, 96 are mounted on slides adjustable in the direction of the cylinder axes by handles 91, 99 to vary the upper positions of their respective levers according to the diameter of the bars on the rack. The rolls of the bar feeder are also laterally adjustable according to the diameter of the bars supplied, opposed pairs of rolls being mounted on slides 47, 48 adjustable by rods 52 from gear-boxes 54 controlled by a common shaft 55 and handle 56. |
