Line Laser Blade Thickness & Defect Inspection

I. Customer Challenges

As a key component of slitting machines, blades feature low cutting resistance, excellent wear resistance and wide milling applicability, enabling processing on various materials such as metal, film, leather, rubber and paper.

Thickness, as a critical parameter of blades, directly affects processing efficiency and quality. Therefore, thickness measurement is required during blade design, manufacturing and application to ensure sharpness and service life.

In addition, to avoid excessive wear or blade breakage, defects such as chipping and damage must be inspected to ensure operational safety during cutting, trimming and other mechanical processing.

II. Inspection Items

• Product Name: Blade

• Measurement Items: Thickness, Defects

• Accuracy Requirement: Thickness repeatability ≤ 0.002 mm

• Inspection Method: Rotational Scanning

Figure | Physical Picture

• Measurement Solution：Two cameras are used in opposite arrangement to measure the thickness from the cutting edge to the base surface. By setting a reference surface and measurement points, as well as datum points on the reference surface, XYZ coordinates of corresponding positions are obtained for spatial plane fitting. The distance from each measurement point to the fitted plane is then calculated.

  
  

Figure | Point Selection Diagram

• Measurement Result：Maximum static repeatability accuracy of blade thickness: 0.0004 mm.

• Defect Effect Display

  
  

Figure | Point Cloud Image

Figure | Detail Image

III. Sensor Parameters

• Line Laser Model: SR8020

• Reference Working Distance (CD): 23 mm

• Z‑Axis Measuring Range (FS): 5.2 mm

• X‑Axis Measuring Width: 14.5 mm

• Z‑Axis Linearity: ±0.02% F.S.

• Z‑Axis Repeatability: 0.1 μm

• X‑Axis Repeatability: 1.5 μm

• X‑Axis Data Interval: 5 μm

• Number of X‑Axis Profile Points: 3200

• Scanning Speed: 3200 ~ 67000 profiles/sec

  
  

  

  
  

Shenshi Intelligent laser 3D profilometers provide up to 6400 X‑axis profile points. Their ultra-high inspection accuracy and scanning speed are widely recognized across industries. Customers with 3D measurement demands are welcome to contact us for consultation.