Aluminum Shell Surface Flatness Detection

Project Introduction

Project Background

With the continuous development of modern manufacturing industry, the requirements for product quality are becoming increasingly higher. As an important component of many products, the surface flatness of aluminum shells directly affects the overall performance and appearance quality of the products. Therefore, accurate measurement and control of aluminum shell surface flatness is particularly important.

Camera Selection

LMI Laser Line Scan Camera Gocator2430

Detection Requirements

Measurement accuracy ≤ 0.05mm
Measurement repeatability ≤ 0.018mm
Measurement cycle ≤ 200ms

Solution

AI-Vision software processes 3D point cloud images directly, performs localization, and conducts plane fitting on specified areas according to drawings for flatness measurement.

Design Concept

Execution Result Display

• Project result display:

  
  

• HMI result display:

  
  

Project Process

One, Initialization

1. Select Load Point Cloud tool to obtain point cloud.

Two, Preprocessing

Position Adjustment

1. Select 3D Square Probe tool twice to find the left and bottom straight lines of the aluminum shell.
   

2. Select 3D Geometry Intersection tool, bind the two edges output from the previous step as input geometry to find the intersection point of the two edges.
   

3. Select 3D Position Adjustment tool, bind the intersection point found by 3D Geometry Intersection tool as origin, adjust x,y positions.
   

Plane Fitting:

1. Select Create ROI Array tool, select 15 different ROIs on the aluminum shell according to drawings.
   

2. Select 3D Region tool, bind ROIs output from Create ROI Array tool, integrate 15 ROI areas into one area.
   

3. Select 3D Plane tool, bind the area set by the previous 3D Region tool as input area for plane fitting, and use the fitted plane as the 0 plane.
   

Three, Flatness Measurement

1. Select Create ROI Array tool, select 50 different ROIs on the aluminum shell according to drawings.
   

2. Select 3D Flatness tool, bind ROIs output from Create ROI Array, perform flatness measurement through the average points of the plane.
   

Four, Data Saving, Result Display and Judgment

1. Select Data Check tool to judge flatness results.

2. Select Create Text tool to summarize displayed content into a string.

3. Select 3D Result Display tool, bind the string output from Create Text tool, display it at specified position in the image.

4. Select Write CSV tool, bind flatness results and OK/NG results, save results to corresponding csv file.