A dual-channel coordinated motion control method for mirror milling

Abstract

The invention provides a double-channel coordinated motion control method for mirror image milling. The double-channel coordinated motion control method comprises the steps of double-channel internal and external working head synchronous control, double-channel internal milling and external supporting stepwise control and double-channel mirror image measurement control, wherein in the step of double-channel internal and external working head synchronous control, a working region and a machining program of an internal stand column milling head and a working region and a machining program of an external stand column milling head are planned on the basis of the inner surface and the outer surface of the same cylindrical workpiece and synchronous control over the internal stand column working head and the external stand column working head is realized; in the step of double-channel internal milling and external supporting stepwise control, stepwise coordinated motion control over an external supporting fixture head and an internal milling main shaft head is realized in a mirror image milling system; in the step of double-channel mirror image measurement control, before milling, the thickness of a workpiece is measured through an external supporting fixture and the milling program of the internal milling head is compensated offline, and during milling, the offset of the milled back of the workpiece is measured through the external supporting fixture and the cutting position opposite to a tool nose of the internal milling head is compensated in real time. The method realizes coordinated motion control over the working heads and supporting heads, can realize self-adaptive milling during three-system parallel mirror image milling, is high in response speed and can be applied to three-parallel-system mirror image numerical control milling machine for the same cylindrical thin-wall workpiece.

Description

technical field [0001] The invention relates to the technical field of mechanical numerical control milling, in particular to a dual-channel coordinated motion control method for mirror milling of cylindrical cylindrical thin-walled workpieces. Background technique [0002] The research shows that before the three parallel systems process the same cylindrical workpiece, it is necessary to uniformly model the coordinate systems of the working heads of each system according to the mirror image method, to ensure that the axis of the working heads of each system coincides with the radial direction of the cylinder, and to ensure that the rotating coordinate systems of the three systems are completely consistent; In the mirror processing of the three parallel systems, the respective processing steps must be consistent, and the effective processing area of ​​the internal and external channels of each system, the overlapping processing area, and the timing of the working heads of eac...

AI Technical Summary

Problems solved by technology

[0005] The existing CNC system itself does not provide the above-mentioned various functions. At this time, it is necessary to design a set of coordinate system management, advanced thickness measurement and real-time deformation measurement compensation mechanism based on the actual processing to achieve the processing goal.

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