| 摘要 |
1,221,824. Work transferring; feeding workpieces. KOPPY TOOL CORP. 9 April, 1968 [13 April, 1967], No. 16906/68. Headings B3B and B3W. Apparatus for transferring tubular workpieces 64 from a work loading station 63 to a machining station 102 and then to an unloading station 104, comprises a workpiece orienting station 100 placed between the loading and machining stations to rotate and longitudinally position each workpiece before it reaches the machining station. The orienting station 100 comprises a fluid pressure operated slide which feeds a mandrel head 138 into the end of each workpiece 64 and pushes it longitudinally against a stop 190, the mandrel head 138 being also rotatable at least one revolution in one direction and then back again to a reference position to engage a lug 148 into a pre-cut recess 194 in the end of the workpiece to rotationally orientate the workpiece. The transfer apparatus comprises a pair of wheels adjustably positioned along a horizontal shaft 20, each wheel having recesses 42 and magnets 44 for receiving and holding the workpieces 64 as they are fed down a gravity feed device in a stepwise path and emerge sequentially opposite an empty recess 42. At the machining station 102, which may be a punching or cutting station, a fluid pressure operated slide advances the workpieces 64 longitudinally to the machining tools and, after the operation is completed, retracts the workpiece. The slide may incorporate a rotating mandrel head to allow the workpiece to be rotated during its machining operation, and may include a radial locking pin, or an internally gripping chuck, or edge gripping jaws to positively move the workpiece. The chuck or gripping jaws are spring operated and release a workpiece by a cam and striker device when the slide is fully retracted. The workpieces 64 are unloaded from the apparatus by means of rods 234. The indexing of the apparatus is driven by an electric motor 68 acting through a clutch to rotate a cam groove which rotates the wheels carrying the workpieces 64. The cam groove includes a dwell period during which the wheels are stationary and orienting, feeding, machining, and retracting of the workpieces is carried out. Automatic electro-fluid pressure controls are provided to prevent indexing before a machining operation is complete. A plurality of the transfer apparatus may be arranged in sequence to build a production line, each one feeding its output into a succeeding apparatus. |
