Multi-axis CNC machine tool with swing head structure and its realization method

Abstract

The invention discloses a multi-axis numerically-controlled machine tool with a swinging head and an implement method thereof. The multi-axis numerically-controlled machine tool comprises the swinging head, a spindle fixed to the swinging head, and a ball cutter arranged at the tail end of the spindle. The sphere center of a ball head of the ball cutter is located on the axis of a rotation shaft of the swinging head. The multi-axis numerically-controlled machine tool further comprises a visual assisting device which is used for detecting whether the coordinates of the sphere center of the ball head of the ball cutter are located on the axis of the rotation shaft of the swinging head or not. The visual assisting device comprises a camera and a backlight plate, wherein the backlight plate is located on one side of the ball cutter, the top side of the backlight plate is perpendicular to the axis of the rotation shaft of the swinging head, and the camera is opposite to the backlight plate. The multi-axis numerically-controlled machine tool is improved with low cost, so that the accuracy is not limited by the length of the cutter when the swinging head drives the cutter to conduct machining, and the accuracy requirement of a speed reducer of the swinging head is insensitive. Meanwhile, the effective travel of the machine tool is fully utilized.

Description

technical field [0001] The invention relates to the field of numerical control machining, in particular to a multi-axis numerical control machine tool with a swing head structure, and a method for realizing the multi-axis numerical control machine tool. Background technique [0002] With the development of society, the shapes of small workpieces such as artworks are becoming more and more complex, and the requirements for precision are getting higher and higher. The emergence of multi-axis CNC machine tools such as four-axis CNC machine tools or five-axis CNC machine tools provides the necessary basic guarantee for the processing of complex parts. [0003] When a multi-axis CNC machine tool performs CNC machining, the difference in tool length will cause changes in the pendulum length and swing range during the swing process, resulting in a reduction in machining accuracy or the inability to continue using the original CNC machining program. In the prior art, an automatic c...

AI Technical Summary

Problems solved by technology

[0003] When a multi-axis CNC machine tool performs CNC machining, the difference in tool length will cause changes in the swing length and swing range during the swing process, resulting in a reduction in machining accuracy or the inability to continue using the original CNC machining program

In the prior art, an automatic compensation device is generally installed in a multi-axis CNC machine tool, but the cost of this automatic compensation device is relatively high, and it is not suitable for general low-precision multi-axis CNC machine tools for processing small workpieces

At the same time, for the multi-axis CNC machine tool with the swing head structure, there are still the following problems: first, to improve the machining accuracy, the precision requirements for the reducer that drives the swing head to swing a certain angle along the swing head rotation axis are also high; The main shaft is installed on the swing head, and the stroke from the tool ball head to the swing head rotation axis is wasted. Taking the machining of a 200mm workpiece as an example, the effective stroke of the machine tool may need to be 400mm to achieve it, and the 200mm wasted stroke is harmful to the machine tool. Say, wasting half the trip can cost three to four times more

Images