Direct speed transition fairing method based on trigonometric function acceleration and deceleration control

Abstract

The invention discloses a direct speed transition fairing method based on trigonometric function acceleration and deceleration control. The method comprises the following steps that a processing code point position coordinate is read, an original processing path is set to be composed of micro line segments connected by continuous point positions, and the length of the micro line segments and an included angle between the adjacent micro line segments are calculated according to point position coordinates; the machining process of each micro line segment is divided into a plurality of segments according to an acceleration function, transition stages of corners of two adjacent micro line segments are located in a deceleration stage of the previous micro line segment and an acceleration stage of the next micro line segment, sin(2x) is adopted as a basis function of jerk to establish an acceleration and deceleration model, and the maximum acceleration and acceleration and deceleration parameters are set; and according to the maximum allowable machining error, the overlapping mixing transition time and the transition starting time of the micro-line segment corner are solved, motion synthesis is carried out, and therefore the machining path after fairing optimization is obtained. The method is advantaged in that one-step transition can be achieved, smooth transition of three-axis motion inflection points can be achieved under the condition that high motion continuity is guaranteed, and high-order continuity of motion in the machining process is guaranteed.

Description

technical field [0001] The invention relates to a method for smoothing a numerically controlled machining path, in particular to a direct speed transition smoothing method based on the acceleration and deceleration control of trigonometric functions. Background technique [0002] At present, CNC machine tools are a very important part of modern machining, which can realize high-speed, high-precision and efficient machining. In the CNC machining process, the smoothing of the tool path and the flexible acceleration and deceleration have become the focus of improving accuracy and efficiency. The micro-segment composed of G01 code points has been widely used in the processing of complex geometric parts. The advantage of the micro-segment is that it can describe the shape of the geometric part well, but at the connection of the micro-segment, there will be differences in the path direction. Continuity and discontinuity of curvature, which will lead to greater vibration during ma...

AI Technical Summary

Problems solved by technology

The complexity of the two-step transition algorithm is related to the optimized tool path; therefore, if you want to obtain a higher path continuity, the complexity of the algorithm will inevitably increase, which affects the real-time performance of processing

At the same time, the linear and geometric transition scheme of the traditional two-step method has limited improvement in the kinematic performance and smoothness of corners.

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