Application / Continuous drawing line

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About Continuous drawing line

  • Input control: Identification of bad quality rolled wire (drawing lines for thick wire)
  • Process control: Monitoring of production lines to avoid scrap (medium and fine drawing blocks)
  • Final inspection: Assurance of crack-free material after last drawing operation or in rewinding plants
  • Typical defects: Laps, holes, longitudinal cracks, tension cracks from annealing, damage from transport devices, damage through defective drawing dies
  • Production line: Single and multiple drawing lines, rewinding lines, all materials
  • The surface of drawn wire and tubing must be free of cracks, holes and other material defects as even small surface defects can lead to defective end products, critical in items such as surgical instruments. Eddy current testing is extremely successful in detecting surface defects at various stages during the production process. For the best test results, encircling testing is used together with rotational testing.
  • Eddy current probe types

  • Encircling inspection. A robust, simple encircling coil surrounds the test piece and detects a multitude of defects in ferrous (with magnetization) and nonferrous materials.
  • Rotational testing. The eddy current probes of the rotating system spin around the test piece as it moves through the equipment. The rotating system is particularly sensitive to longitudinal defects and excellent for large tube diameters (up to 130 mm (5 1/8 in). PRÜFTECHNIK's series of rotating systems (RS35HS,RS65, RS130) was designed for easy operation and maintenance, and with the raw industrial environment in mind.
  • Eddy current test equipment

  • PRÜFTECHNIK offers a wide variety of eddy current inspection equipment that ranges from the most basic test equipment to powerful testers with wide-reaching capabilites for integration into central production control systems and 8-channel inspection using multiple coil systems.

Reated Projects

Rotational testing

  • Products tested: All seamless products that are round or off-round
  • Production types: Straightening lines, continuous drawing lines, offline final inspection
  • Inspectio

Double-wall brazed tubing

  • Detects critical defects: Finds typical processing defects such as flaws in the inner and outer seam, copper spots and runs
  • Inline inspection: Immediate test results and feed

Cold heading machines

In the manufacture of small parts using cross-cutting or cold heading machines, high scrap rates often result from defective starting material. Testing the initial material and cutting out the defecti

Sensitive bar testing

Application fields

  • Production type: very high quality bars and seamless tubes
  • Materials: round black or bright steel (ferromagnetic); rolled, straightened or sand blasted
  • Diamet