Interference and kinematic constrained five-axis machining tool axial linear optimization method

Abstract

The invention proposes an interference and kinematic constrained five-axis machining tool axial linear optimization method, and belongs to the technical field of numerical control machining. The method comprises the following steps of firstly transforming a feasible space of the tool axis vector and an initial tool axis vector into rotation axis expression in the machine tool coordinate system; comprehensively considering the feasible space constraint of the tool axis vector and the angular velocity, angular acceleration and angular acceleration constraint of the machine tool rotation axis bytaking the minimum deviation between the rotation axis optimization value and the initial value as the goal to establish a linear optimization model of the tool axis vector, and finally obtaining an optimized tool path. The method is suitable for tool axis vector optimization in complex surface five-axis NC machining, and can effectively improve kinematics characteristics of the machine tool and improve the processing quality and efficiency.

Description

technical field [0001] The present invention relates to a five-axis machining tool axis linear optimization method with interference and kinematic constraints, in particular to an overall linear optimization method for five-axis machining tool axis vectors considering tool interference and rotational axis kinematic constraints, and belongs to the technical field of numerical control machining. Background technique [0002] Five-axis CNC machine tools are widely used in the processing and manufacturing of complex curved surface parts such as aero-engine blisks. Compared with the three-axis machine tool, the two rotating axes of the five-axis machine tool not only bring more flexible manufacturing technology, but also pose challenges to the control of the tool attitude during machining. At present, the generation of the tool axis vector is mainly based on the geometric information of the tool and the workpiece. Since the kinematic characteristics of the machine tool are ignore...

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Problems solved by technology

This method does not consider constraints such as tool collision constraints in the tool axis vector optimization, and belongs to the category of unconstrained linear programming, which limits the scope of application of this method to a certain extent.

At present, the constraints of kinematic characteristics such as angular velocity and angular acceleration and the requirement of no collision of the tool can be considered, and the constrained linear programming model for the optimization of the tool axis in five-axis machining has not been reported yet.

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