Method for generating inner surface polishing path of spatial bend pipe by c reconstruction

Abstract

The invention belongs to the technical field of magnetic grinding, and especially relates to a method for generating an inner surface polishing path of a spatial bend pipe by center line reconstruction. The method is characterized by comprising the following steps: step 1, obtaining outer contour point cloud of a spatial bend pipe; step 2, through curve fitting, obtaining three contour lines; step 3, generating a spatial bend pipe by using the fit outer contour line through a cross section intersection method; step 4, performing point discretization on the generated bend pipe center line and the outer contour line generated by measurement; step 5, establishing a space rectangular coordinate system O0X0Y0Z0, setting the rectangular coordinate system as a robot tool coordinate system; step 6, through translation and rotation, transforming a workpiece coordinate system to the tool coordinate system; step 7, through conversion of a homogeneous coordinate transformation matrix on the coordinate system, obtaining a pose coordinate in a processing path at the processing moment; step 8, obtaining a final machine polishing path. The method can accurately determine a processing path of a complex spatial bend pipe, and improves working efficiency.

Description

Technical field [0001] The invention belongs to the technical field of magnetic grinding, and in particular relates to a method for generating a polished track of the inner surface of a space elbow by centerline reconstruction. Background technique [0002] In the fields of aerospace, automobile and other machinery, engine volume requirements are becoming more stringent. In order to reduce unnecessary space waste, a space elbow with a smaller space occupation rate is used to conduct oil and gas transmission. However, due to factors such as modern technology level, surface defects such as cracks and pits will be generated on the inner surface of the elbow, especially at the bend, causing turbulence and vibration when flowing gas or liquid inside the elbow, which in turn affects the engine's performance Smooth operation and reduce service life. [0003] However, it is difficult to obtain the processing trajectory of the spatial elbow, so the planning of the processing trajectory is ...

AI Technical Summary

Problems solved by technology

However, due to factors such as the modern technology level, surface defects such as cracks and pits will occur on the inner surface of the elbow, especially at the bend, causing turbulence and vibration when flowing gas or liquid passes through the inside of the elbow, which in turn affects the performance of the engine. Smooth operation, reduced service life

[0003] However, it is difficult to obtain the machining trajectory of the space elbow, so the planning of the machining trajectory is particularly important. In the general machining process, the method of manually marking points is usually used to determine the centerline of the elbow. Since this method is manually operated, Therefore, the operation is cumbersome, and the fixed point is easily disturbed, which may cause large errors, affect the processing effect, and reduce the processing efficiency.

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