Visual inspection method for surface quality of inner hole of copper or copper alloy short straight pipe

Abstract

The invention relates to a visual inspection method for the surface quality of an inner hole of a copper or copper alloy bright short straight pipe. The method comprises the following steps: arranginga horizontal inspection rack in an inspection region, and enabling the illuminance of the inspection region to be 75-150Lux; putting the copper or copper alloy bright short straight pipe on a horizontal inspection rack, placing a light reflection flat plate at one end of the short straight pipe, wherein the light reflection flat plate is a white and opaque flat plate, the surface of the light reflection flat plate is rough, the roughness Ra is 6-15 microns, an included angle of 30-60 degrees is formed between the light reflection flat plate and the horizontal plane, and it is guaranteed thatprojections of the copper or copper alloy bright short straight pipe in the horizontal direction are all located in the light reflection flat plate; and observing the surface quality of the inner holeof the short straight pipe at the other end of the pipe. The method is remarkable in internal control quality inspection effect, simple in step and easy to operate.

Description

Technical field [0001] The invention belongs to the technical field of pipe manufacturing, in particular to a visual inspection method for the surface quality of the inner hole of a copper or copper alloy short straight pipe. Background technique [0002] The visual inspection method is one of the most common and basic inspection methods in the pipe inspection items. It can inspect the surface cracks, peeling, pits, scratches and other defects of the pipe. It can also inspect the surface cleanliness and color. It is the pipe inspection The original and reliable inspection method in the project, but because the human eye cannot observe the inner hole in the entire range of the pipe, the inspection of the inner hole surface quality of the pipe is a difficult problem. [0003] At present, the more common methods for inspecting the surface quality of the inner hole of the copper or copper alloy short straight pipe are: [0004] 1) Illuminate both ends of the pipe with flashlight light f...

AI Technical Summary

Problems solved by technology

This method uses the diffuse reflection of light from the pearl cotton coil, but the light in the tube is not uniform, and when the light in the inspection area changes, the inspection effect will become poor. At the same time, the pearl cotton coil is easy to damage and cannot be used for a long time