| 摘要 |
1468650 Workpiece transferring multi-spindle lathe J G WEISSER SOHNE 11 Dec 197S [12 Dec 1974] 50901/75 Headings B3B and B3T A double-spindle face lathe comprises workpiece loading and unloading apparatus including a support frame 20 securable to the centre body 10 and having a vertical guideway 24, a workpiece transfer carriage 26 slidable by way of hydraulic piston and cylinder means 28 along the guideway 24 and carrying a four armed spider 30 which is slidable by hydraulic means 32 along an axis which is transverse to the direction of movement of the transfer carriage 26 and indexable by 90 degree movements about the axis, each arm of the spider being provided with workpiece gripping means 34. The apparatus is usable in conjunction with workpiece feed and discharge chutes 36, 38 whereby workpieces are received by the transfer carriage and spider 4 supplied to the work spindle 12 of the lathe and subsequently removed from the spindles 12 and transported to the discharge chute. There are two series of operation of the apparatus described. In the first sequence of operation there is included a workpiece turning device 42 for turning the workpiece end to end when part of the machining cycle. In this sequence a workpiece received from the feed chute 36 is transported by the spider 30 to a first lathe spindle, from the spindle to the turning device, from the turning device to the second spindle and ultimately from the second spindle to the discharge shoot at the completion of the machining cycle. Of course the spider having four gripping means, permits the simultaneous transferring and successive machining of four workpieces with the corresponding moving and indexing of the spider according to the desired machine cycle. In the second sequence of operation in which the workpiece inverting operation is omitted two workpieces are simultaneously received from the feed shoot, transferred to the spindles 12, removed from the spindles the transfer spider being indexed to receive two more workpieces and then indexed to present the two finished workpieces to the discharge shoot. Pairs of workpieces are simultaneously received, machined and discharged in this sequence. A pivotable channel 48 is provided between the feed and discharge shoots to permit the feed and discharge of pairs of workpiece. |
