A high-precision CNC milling machine

Abstract

The invention relates to the technical field of milling machine equipment, in particular to a high-precision numerical-control milling machine. The high-precision numerical-control milling machine comprises a base, a stand column, a saddle, a workbench and a controller, wherein one side of the base is provided with the stand column; a milling machine is arranged on the stand column; the fixed saddle is arranged on the base; the workbench is arranged on the saddle; the controller controls movement of the workbench through the saddle; a reverse gap is generated in a reciprocating motion processof a nut on a lead screw pair; pitch errors of a lead screw are accumulated to affect workbench positioning and moving precision, so that processing precision of the numerical-control milling machineis weakened, and therefore, one lead screw pair is arranged to separately drive the saddle to move in single direction, the nut only drives and feeds in single direction, influences of pitch errors are reduced while the nut is in two-way drive on the lead screw, generation amount of the reverse gap is reduced, influences on re-positioning precision are reduced, and processing effect of the high-precision numerical-control milling machine is ensured.

Description

technical field [0001] The invention relates to the technical field of milling machine equipment, in particular to a high-precision numerical control milling machine. Background technique [0002] CNC milling machine is an automatic processing equipment developed on the basis of general milling machines. With the rapid development of social production and science and technology, mechanical products are becoming more and more sophisticated. It comprehensively applies automatic control, servo drive, precision measurement and new machinery. The technical achievements in various aspects such as structure are the development direction of CNC machine tools in the future, and the machining accuracy of CNC milling machines is an important indicator to measure its performance; for the introduction of machining accuracy of CNC milling machines, please refer to: Zeng Chao et al., Positioning accuracy detection of CNC milling machines and Research [J], Mechanical Engineer, 2018(No.2).27...

AI Technical Summary

Problems solved by technology

[0003] During the working process of the CNC milling machine, various problems affecting the machining accuracy will appear, including backlash error, pitch error and repeat positioning accuracy error. The accumulation of these errors poses a huge challenge to the machining accuracy of the CNC milling machine. The key to the high-precision machining effect of CNC milling machine

[0004] There are also some technical solutions for high-precision CNC milling machines in the prior art. For example, a Chinese patent with application number 2019107071481 discloses a high-precision CNC milling machine: including a base, the middle of the top surface of the base is fixedly welded with a support column, and the support The top of the column is fixed with a milling cutter base by bolts, and the bottom end of the milling cutter base is provided with a clamping mechanism. The milling cutter is fixed inside the milling cutter base through the clamping mechanism, and one side of the milling cutter base is fixed and welded. There is a mounting plate, on which a distribution box is fixed by screws, and the other side of the milling cutter base is fixedly welded with a rotating shaft base, and a cavity is opened inside the rotating shaft base, and a connecting rod, The disc and the cylinder, the connecting rod, the disc and the cylinder are in clearance fit with the inner wall of the rotating shaft base, the bottom end of the connecting rod is fixedly welded with the disc, and the bottom end of the disc is fixedly installed with the cylinder; The mechanism, the clamping mechanism and the milling cutter mechanism can realize the rapid replacement of the milling cutter tool, have strong practicability, convenient operation, and speed up the processing progress of the workpiece; problems; making it difficult to continuously guarantee the processing effect of the high-precision CNC milling machine in this technical solution

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