Kinematics control method for complex-curved-surface five-axis numerical control machining cutter vectors

Abstract

The invention provides a kinematics control method for complex-curved-surface five-axis numerical control machining cutter vectors, belongs to the field of complex-curved-surface five-axis numerical control machine took precise and efficient machining, and particularly relates to a kinematics control method of cutter shaft vectors in the complex-curved-surface five-axis numerical control machining process. According to the kinematics control method of the cutter vectors, on the basis that a complex-curved-surface parametric equation is determined, the function relationship between the cutter shaft vectors and machining track curved line parameters can be established. Then, a motion parameter calculation method for a five-axis numerical control machine tool rotating feed shaft is established, so an angular velocity calculation result and an angular acceleration calculation result of the rotating feed shaft can be obtained. Finally, smoothing is carried out on the cutter shaft vectors to ensure that the rotating feed shaft of the machine tool moves smoothly and achieve the kinematics control over the cutter shaft vectors. The kinematics control method for the complex-curved-surface five-axis numerical control machining cutter vectors is wide in application scope, effectively improves machining quality of a complex curved surface, and gives better play to the performance of the machine tool.

Description

technical field [0001] The invention belongs to the field of precision and high-efficiency machining of five-axis numerical control machine tools for complex curved surfaces, and in particular relates to a kinematic control method of a tool axis vector during five-axis numerical control machining of complex curved surfaces. Background technique [0002] Complex surface parts are widely used in aerospace, energy and power fields, and are generally processed by five-axis CNC machining equipment. In the process of NC machining of complex curved surfaces, good contact between the tool and the surface to be processed is one of the key factors to ensure the quality of part processing. Ideally, the direction of the tool axis vector should be consistent with the normal direction at the processing point of the curved surface. The emergence of the rotation axis of the five-axis CNC machine tool enables the tool to move relative to the workpiece in three-dimensional space. The tool axi...

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is to aim at the existing technical defects, based on differential geometry and machine tool kinematics, to establish a calculation method for the motion parameters of the five-axis CNC machine tool's rotary feed axis, to determine the change of the tool axis vector and the machine tool's rotary feed axis The relationship between the kinematic characteristics, based on this, the tool axis vector is reasonably smoothed, the kinematic control of the tool axis vector in five-axis CNC machining of complex surfaces is realized, and the tool axis in five-axis CNC machining of complex surfaces is reduced. The vibration of the machine tool caused by the sharp change of the vector avoids exceeding the movement limit of the machine tool's rotary feed axis, improves the quality of surface processing and maximizes the performance of the machine tool

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