A CNC milling machine driven by a rack and pinion to move the gantry

Abstract

The invention discloses a numerical control milling machine realizing moving of a gantry under driving of a gear and a rack. The numerical control milling machine comprises a fixed table (1), a Y movement gantry (2), an orthogonal carriage (3) and a Z carriage (4). According to the invention, Y rail bases are arranged on two sides of the fixed table, the Y movement gantry is connected with a Y rail pair to be capable of moving on the Y rail bases left and right, and is driven through meshing of a double-wheel driving device and the rack. During working, a workpiece is clamped on the fixed table, the Y movement gantry does Y-direction movement left and right, the orthogonal carriage does X-direction movement front and back, and the Z carriage does Z-direction movement up and down, so as to guide a cutting tool mounted on an electric spindle to carry out three-dimensional cutting processing on the workpiece together; according to the technical scheme, the gapless meshing between the double-wheel driving device and the rack drives the Y movement gantry, the length of the rack is not limited, and the Y-direction work stroke design length of the machine tool can be randomly extended, so that numerical control milling of an ultralong workpiece is time-saving, efficient, low in cost, and free of technological seam defects.

Description

technical field [0001] The invention relates to a numerically controlled milling machine, in particular to a numerically controlled milling machine which is used for three-dimensional automatic milling and processing of ultra-long workpieces, which is driven by a rack and pinion to move a gantry. Background technique [0002] The CNC milling machine uses a servo motor to drive the X, Y, and Z slides through the ball screw pair to realize three-dimensional milling. The ball screw pair is a rotating mechanism that converts rotary motion into linear motion. Due to the limitation of material elasticity , The ball screw pair should not be too long, thus limiting the length of the Y-direction working stroke of the CNC milling machine. Workpieces that need to be processed longer than the length of the Y-direction working stroke of the CNC milling machine are called super-long workpieces; for super-long workpieces, the existing technology adopts the method of segmented U-turn proces...

AI Technical Summary

Problems solved by technology

[0002] The CNC milling machine uses a servo motor to drive the X, Y, and Z slides through the ball screw pair to realize three-dimensional milling. The ball screw pair is a rotating mechanism that converts rotary motion into linear motion. Due to the limitation of material elasticity , the ball screw pair should not be too long, thus limiting the length of the Y-direction working stroke of the CNC milling machine

Workpieces that need to be processed longer than the length of the Y-direction working stroke of the CNC milling machine are called super-long workpieces; for super-long workpieces, the existing technology adopts the method of segmented U-turn processing, that is, a certain side section of the super-long workpiece is processed first, and then U-turn Processing the other side section of the ultra-long workpiece; in this way, it is labor-intensive and time-consuming to find the correct position of the turning and clamping, the efficiency is low, the cost is increased, and the defect of the processing seam will be left; therefore, the existing technology is labor-intensive, time-consuming, inefficient, Problems and deficiencies of high cost and process seam defects

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