JPN

NUGGET
PROFILER

Non-destructive inspection equipment
for spot welding using magnetism.

It is an inspection equipment which can quantify the nugget of spot welding easily.
This device uses magnetism and, unlike ultrasonic systems, does not require the application of gel during inspection. Inspection can be performed in dry conditions.
Oil on the product surface does not affect the inspection.

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Features

Product
Specifications

Features

  • Non-destructive inspection equipment for spot welding using magnetism.
  • Adoption of an unprecedented new inspection principle.
  • No gel needed for inspection.
  • Can quantify the nugget diameter.
  • Can distinguish between nugget and cold joint.
  • Inspection is possible in as little as 4 seconds per welding point.
  • Can check the fluctuation of welding quality.
  • For inspection of ultra-high tensile strength steel.
  • Inspection results are automatically saved as CSV files. Can be viewed and edited in Excel.
  • It’s powered by AC or battery.

Inspection method

Nugget profiler can be used at parts companies.

  1. All parts in a production lot are quantified: Variations in the lot can be confirmed.
  2. Then, a single piece can be sampled out of the lot and subjected to breaking test to assure the quality.

Note :

The outflow of defective parts can be prevented.
Parts other than those subjected to breaking test can also be checked for quality.

Example of operational use

Inspection scenery

Inspection scenery

Reports, Case Studies

Equipment Composition

This equipment is composed of the following four parts.

  • Main body : hardware control, function of preparation of exciting voltage pattern.
  • Tablet PC : data analysis and man machine IF functions.
  • Sensor probe : generating magnetic flux and data acquisition functions.
  • Handy switch : trigger function of inspection data recording

Common specifications

Model NPH03B, NPF02
Inspection welding diameter 3mm to 7mm
Thickness of 1sheet 0.7mm to 2.3mm
Specimen sheet type ultra high tensile strength steel "1280Mpa" to Ordinary steel "270MPa"
Plating Zinc, None
Number of Plate Layers Two Sheets, three sheets(Inspection from both sides are necessary.)

Individual product specifications

NPH03B NPF02
Type Portable type Fixed type
Size 280x205x70mm / 11x8x3inch 350x255x100 mm
Unit Weight 2.32kg / 5lb 5.40kg / 12lb
Sensor Weight 0.25kg 0.25kg
Power supply Two kinds of power supplies.
(1) AC85V to 240V, 0.5A
(2) Battery (8size AA Ni-MH battery)		 AC85V to 240V, 0.5A

Comparison with other inspection methods

Nugget profiler Ultrasonic type Chisel test
Quantification of a nugget excellent good poor
Distinction with
Cold-joint		 excellent good excllent
Damage to the test
object		 excllent good poor
Inspection of three sheets good excellent good
The contents of detection Organizational Change Sound bounce time Mechanical strength
A thing to be examined Steel,Steel and Dissimilar Material Joining Steel, Nonferrous metal Steel, Nonferrous metal