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

A surface quality and visual inspection technology, applied in the field of pipe manufacturing, can solve the problems of uneven light, long-term use, and easy damage of pearl cotton coils

Pending Publication Date: 2020-11-24
江苏隆达超合金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A visual inspection method for the surface quality of the inner hole of a copper or copper alloy bright short straight pipe includes the following steps:

[0020] a. Arrange a horizontal inspection platform in the inspection area, the height of the inspection platform is 1000mm, and the illuminance of the inspection area is 75Lux;

[0021] b. Put a copper or copper alloy bright short straight tube with a straightness of 1mm / m, an outer diameter of 6mm, and a length of 500mm on the horizontal inspection bench in step a, and place a rectangle with an area of ​​4000mm on one end of the short straight tube The light reflecting plate is a white and opaque plate. The surface of the light reflecting plate is rough, with a roughness Ra of 6μm, and the angle between the light reflecting plate and the horizontal plane is 30° to ensure that the copper or copper alloy bright short straight tube The horizontal projections are all located in the light reflecting plate;

[0022] c. Observe ...

Embodiment 2

[0025] A method for visual inspection of the surface quality of the inner hole of the copper or copper alloy bright short straight pipe includes the following steps:

[0026] a. Arrange a horizontal inspection platform in the inspection area, the height of the inspection platform is 1500mm, and the illuminance of the inspection area is 150 Lux;

[0027] b. Put a copper or copper alloy bright short straight tube with a straightness of 1.5mm / m, an outer diameter of 90mm, and a length of 5000mm on the horizontal inspection bench in step a, and place a 4000mm square tube at one end of the short straight tube Rectangular light reflection plate, the light reflection plate is a white and opaque plate, the surface of the light reflection plate is rough, the roughness Ra is 15μm, and the angle between the light reflection plate and the horizontal plane is 60°, ensuring the bright and short straight tube of copper or copper alloy The projections in the horizontal direction are all located in...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88G01N21/954
CPCG01N21/8803G01N21/954
Inventor 王植栋浦益龙周向东高云龙陈芳
Owner 江苏隆达超合金股份有限公司
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