Power head lifting mechanism of gantry movable type numerical-control drilling and milling machine

Abstract

A power head lifting mechanism of a gantry movable type numerical-control drilling and milling machine comprises a power head box. The power head lifting mechanism is characterized in that linear guide rails are fixedly mounted on two sides of the power head box, guide sliders are slidably connected onto the linear guide rails and are fixedly mounted on mounting seats, and the mounting seats are fixedly mounted on a moving plate; and a ball screw is fixedly arranged in the power head box and is in transmission connection with an output shaft of a servo motor, the axis of the ball screw is parallel to the linear guide rails, the servo motor is fixedly arranged inside the power head box, an upper bearing block and a lower bearing block are rotationally mounted on the ball screw, bearings are arranged in both the upper bearing block and the lower bearing block, the upper bearing block and the lower bearing block are fixedly connected with the power head box, a nut is screwed on the ball screw and is positioned between the upper bearing block and the lower bearing block and is fixedly connected onto a nut seat, and the nut seat is fixedly connected onto the moving plate. The power head lifting mechanism has the advantages that eccentric torque generated by a cutting tool is effectively reduced, the service life of the tool is prolonged, the cutting machining precision of the tool is improved, and space occupied by the power head lifting mechanism is reduced.

Description

technical field [0001] The invention relates to the technical field of numerical control drilling and milling equipment, in particular to a drag chain installation structure in a gantry mobile numerical control drilling and milling machine. Background technique [0002] The CNC gantry drilling and milling machine is a processing equipment for large parts. The structure of the gantry mobile CNC drilling and milling machine is characterized by the movement of the gantry frame and the fixed worktable, so there is no limit to the weight of the workpiece, and super long parts can be processed. With its automation With the continuous improvement of performance and compounding degree, it has been widely used. In the traditional large-scale gantry mobile CNC drilling and milling machine, the linear guide rail and ball screw used in the transmission structure of the lifting drilling and milling power head are installed on the back of the lifting spindle and placed in parallel with th...

AI Technical Summary

Problems solved by technology

In the traditional large-scale gantry mobile CNC drilling and milling machine, the linear guide rail and ball screw used in the transmission structure of the lifting drilling and milling power head are installed on the back of the lifting spindle and placed in parallel with the lifting spindle, so the whole The transmission structure will be arranged very wide, thereby increasing the width of the machine tool. At the same time, due to the large hanging body of the lifting spindle in this arrangement, eccentric moments will be generated during cutting, which will easily shorten the service life of the tool and cause poor cutting accuracy.

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