Direct speed transition method of three-axis micro-line segment based on trigonometric function acceleration and deceleration control

Abstract

The invention discloses a three-axis micro-line segment direct speed transition method based on trigonometric function acceleration and deceleration control. The length of each micro-line segment and the rotation angle between any two adjacent micro-line segments are obtained from the point coordinates of the processing code; for the rotation angle greater than 0° Establish the trigonometric function acceleration and deceleration model to obtain the interpolation velocity function and interpolation displacement function of the acceleration section, constant velocity section and deceleration section corresponding to the microline section; carry out speed planning to determine the interpolation time of each section; set the phase The maximum transition error of two adjacent micro-segments, solve the maximum transition line segment length, assuming that the transition line lengths of the two are equal, and ≤ the minimum value of the length of the deceleration segment of the first micro-segment and the length of the acceleration segment of the second micro-segment; determined by the length of the transition line segment Transition start time; transition time is calculated by interpolating the displacement function; transition path is obtained by synthesizing the motions of the transition line segments of two adjacent micro-line segments. The invention reduces the complexity of the algorithm and improves the processing efficiency at the corner.

Description

technical field [0001] The invention relates to the technical field of numerical control in mechanical manufacturing engineering technology, in particular to a direct speed transition method for three-axis micro-line segments based on trigonometric function acceleration and deceleration control. Background technique [0002] At present, CNC machine tools are widely used in the machining industry due to their high production efficiency. In modern industrial product modeling design, CAM software can convert two-dimensional or three-dimensional model information into the form of continuous micro-line segments. However, due to the discontinuity of the continuous micro-line segment trajectory, the CNC needs to reduce the speed at the corner of the adjacent micro-line segment to meet the processing requirements. In this way, the processing efficiency is greatly reduced, and frequent acceleration and deceleration lead to vibration of the machine tool. Vibration makes the machine t...

AI Technical Summary

Problems solved by technology

The complexity and accuracy of the two-step transition algorithm are related to the type of transition curve inserted. The more complex the transition curve algorithm is inserted, the higher the path continuity will be obtained, and the complexity of the algorithm will be increased, which will affect the real-time performance. The linear and geometric transition scheme of the traditional two-step method has limited improvement in the kinematic performance and smoothness of corners

Images