| 摘要 |
PURPOSE:To perform the burring in the whole zone on the lower face of a work by providing a grinding means freely abuttably on the work back face at the lower part of a table between the work position of a plate stock work machine and a work holding positioning device. CONSTITUTION:A dust-proof sponge 45 is provided at the height of a free ball bush 47 bearing a work W on the periphery of the cut groove 37 of a stationary table 29 and a dust collection inlet port 49 is provided in an adequate number on the lower face of the stationary table 29. A strip like abrasive cloth 51 of a grinding means is rewound from one part, passing the upper part of an air nozzle 39 via an idle roller 53 and is wound to the other part via the idle roller 55 of the other part at both outsides of the dust collection inlet port 49. The dust-proof cover 59 descending upto the upper face of the work W by being driven by the hydraulic cylinder 57 provided on an upper part frame 9 is provided at the position of a long cut groove 37 on the upper face of the work W. The work is thus ground by the abrasive cloth blown up by an air nozzle up to the inner peripheral part of a worked hole and the back face of the work immediately after being worked, and the caused burr is removed. |
