| 摘要 |
In a machine tool having a horizontal, hollow main spindle having therein a main chuck for gripping a bar stock and confronting at a front thereof a machining zone, into which the forward end of the bar stock is intermittently fed through the main chuck from the rear for every cycle of machining by a selected tool mounted on a tool support structure on feed slides and brought into the machining zone to carry out machining of the bar stock, a bar end support engages and supports the forward end of the bar stock at the start of each intermittent feeding thereof and stably guides the same fully into position for machining, unrelatedly to the rotation of the main spindle, whereby the cyclic bar feeding and machining operation can be continuously carried out without stopping the main spindle. Means are provided whereby bar stocks of circular cross-sectional shape and any shape other than a circle can be thus machined. |
