| 摘要 |
FIELD: machine building.SUBSTANCE: in a horizontal milling machine with a box-type frame where a vertical pole with guides for vertical travelling of a knee is installed, the main spindle of the machine is protruded from the pole, and a ram-type arm bracket is equipped by a swivel head with a spindle having an independent drive with an attachment head with its own spindle being attached to the swivel head, the latter is provided with two pivot axis: a horizontal one being the axis of the ram-type arm bracket and a vertical pivot axis of the arm bracket perpendicular to it; the attachment head can rotate around its axis. Milling tools are fixed directly in the spindles or mandrels, and holding of a mandrel inserted in the main spindle is provided by outer supports. A workpiece travels along by the guides of a stationary table, across - by the table slides moving in the guides placed in the horizontal plane on the knee, and vertical travelling of the workpiece is performed by the vertical movement of the knee which is presented as a box with large overhanging length in respect to the vertical pole guides mating it with the pole, a transmission gear box is built-in in the knee, and a main spindle speed gear box - in the pole; the knee comprises a multishaft feed gear box, distributing-reversing mechanisms with electromagnetic clutches and a gear with a drive screw.EFFECT: higher efficiency and reliability of a machine.3 cl, 7 dwg |
