Tailor Welded Blanks (EMAT)

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TEMATE SI-WB is the industry standard for automated inspection of laser welds in Tailor Welded Blanks. TEMATE SI-WB can be integrated on any line using the line conveyor, de-stacking robots or automated and manual scanners from Innerspec or other vendors. The TEMATE SI-WB system can be complemented with OPTEMATE, a laser camera system designed to be integrated seamlessly within the TEMATE platform.


  • Non-contact EMAT technique.
  • Guided waves fill up the volume of the material and provide thru thickness inspection in one pass.
  • Detects and discriminates “planar” defects such as lack of fusion, lack of penetration, concavity or mismatch, and “point” defects such as holes and porosity.
  • Insensitive to cosmetic defects that do not affect the structural quality of the weld.
  • Less sensitive to probe positioning, no “rastering” motion or “phased array” of sensors necessary. Self-calibrated sensor. No need for teaching period or regular calibrations. Permits inspection at up to 1m/s in completely automated environments.
  • Exclusive flexible sensor technology that conforms to the surface and undulations of the part.
  • Multi-sensor capabilities with one system controlling up to two sensor heads.
  • Most proven and reliable system in the market with hundreds of systems installed.
  • Optional camera system for measurement of lateral offset (a.k.a blank misalignment), excess weld metal, and positive mismatch.

General Specifications

Materials Inspected

  • Steel and Aluminum, all grades coated and uncoated
  • 0.010” (0.3mm) to 0.138” (3.5mm) thickness

Defect Detection

  • Only system in the market capable of meeting ALL requirements as per ISO 13919-1 and SEL100. Capable of meeting all known OEM quality requirements for TWB.

Inspection Technique

  • Volumetric guided waves for inspection of the weld (i.e. top and bottom surface, and internal).
  • Pitch-catch and pulse-echo configurations.
  • Maximum sample rate of 2000 pulses per second for inspection speed of 1m/s.
3D (top) 3D (bottom)
Lack of Fusion 10% t2 x 12mm NA
Lack of Penetration 10% t2 x 12mm NA H ≥ 50µm*
Porosity & Pinholes ≥ 0.3mm NA
Concavity 10% t2 x 12mm H ≥ 50µm*
Mismatch 10% t2
(negative only)
H ≥ 50µm*
Blank Misalignment NA 0.5mm @ 50m/min, 0.05mm @ 10m/min
Excess Weld Metal NA H ≥ 50µm* NA
Excessive Root Penetration NA NA H ≥ 50µm*
t2: Thickness of thinnest blank
H: Height

Integration Options

Innerspec Table Scan

  • High-speed inspection of linear welds using Innerspec’s TEMATE.
  • Manual start or factory PLC controlled.
  • Adjustable for different part sizes, and multiple welds.
  • Compatible with all Innerspec weld inspection sensors for scans up to 1 m/sec.
  • Visual & digital results for each weld.
  • Parts loaded manually or with robot.

Watch this video to learn more about the Innerspec Table scan - Click here