Acquisition method of coordinate of point position to be processed on arc segment workpiece surface on rotary workbench

Abstract

The invention relates to a numerical control processing method and particularly discloses an acquisition method of a coordinate of a point position to be processed on the arc segment workpiece surfaceon a rotary workbench. The acquisition method comprises the following steps of a, horizontally placing an arc segment workpiece on the rotary workbench of a numerical control floor boring and millingmachine, and regulating the position of the workpiece to enable the radial direction of an initial processing point A on the workpiece to be coincided with a spindle direction; b, collecting two coordinates on one arc line, and establishing a workpiece initial circle center O2 calculation model; c, rotating the workbench, collecting new coordinates of the two points, and establishing a rotary center O1 calculation model; and reducing the initial position of the workbench, and establishing a workpiece coordinate system by taking a rotary center O1 of the workbench as a coordinate origin; d, rotating the workbench according to a radial included angle alpha between the point B to be processed and the point A to be process to enable the workpiece to rotate with the angle alpha along with workbench, and establishing a point B coordinate position calculation model to acquire a B point coordinate. The numerical control processing method has the advantages of simpleness in operation, high automation degree, high processing accuracy and wide application range.

Description

technical field [0001] The invention relates to the technical field of numerical control machining, in particular to a method for acquiring coordinates of points to be processed of workpieces on a rotary worktable. Background technique [0002] When processing circular arc (i.e. non-full circle) workpieces on the rotary table of the CNC floor boring and milling machine, since the spindle of the CNC floor boring and milling machine cannot swing the angle (that is, the Z axis is always perpendicular to the X axis and the Y axis—— The definition of X, Y, and Z axes of the CNC floor boring and milling machine is according to the national standard), and the radial direction of the point to be processed on the arc of the workpiece must be made (the "radial direction of the point to be processed" refers to the distance from the point to be processed on the XOZ plane to The starting point of the processing point is pointing to the direction of the center of the workpiece in the arc ...

AI Technical Summary

Problems solved by technology

[0004]1. Low precision

The position of each point to be processed is determined by marking, and when drawing the cross center line of the workpiece to be processed, the error of manual marking is relatively large; in addition, before processing each point to be processed, manually find the processing point and align When the knife finds the datum, there are also human error

These errors are very unfavorable to the control of machining accuracy, resulting in low machining accuracy;

[0005] 2. Complicated operation and low efficiency

The efficiency of manual marking is low - the more points to be processed, the more obvious, and the operator needs to perform the following operations before each point to be processed: find the processing point, install the tool, set the tool, process the point to be processed, Unloading the tool, the whole operation process is very cumbersome, time-consuming and inefficient;

[0006] 3. Heavy workload and labor intensity

Each point to be processed needs to draw a cross center line. It is necessary to frequently repeat the operations of finding the processing point, installing the tool, setting the tool, processing the point to be processed, and removing the tool. The workload is heavy. Knives and other operations require people to squat or bend over to operate, which is labor-intensive;

[0007] 4. Low degree of automation

The position of each point to be processed needs to be marked manually. Before processing a point to be processed, it is necessary to manually find the processing point and set the tool. The automatic control function of the CNC machine tool is not fully utilized, and the degree of automation is low.

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