Products

Manufacture of Tooling for Pipe, tube & Profile

Our company aims to keep our customers competitive by helping them develop their products more effectively, and therefore we constantly invest in technology projects to develop and manufacture complete tooling for manufacturers of pipes, tubes and profiles.

Removal Systems Internal  Bead Welding

Star Technology provides its customers with complete systems for removal of weld bead inner tubes. Removal tools that work with adjustable air pressure assisted by a booster of compressed air. We keep in stock all the spare parts removal system for prompt delivery for our customers.

Here's the layout of the system for removal of weld beads inside!

Impeders

There are five different types of Impeders:

  1. RETURN FLOW
    It is used in critical applications where it is essential that the inner surface of the tube stays dry. Thus the liquid injected through a tube circulates around the ferrite and is expelled through an outlet pipe.



  2. FLOW THROUGH
    It is fully assembled with ferrite slotted to increase the surface area enhancing its cooling and thus increasing their useful life. They are mechanically strong and rigid.



  3. FLOW THROUGH "EXPOSED FERRITE IMPEDERS"
    It is mounted in a way where no protective cover covers the entire length of the core, leaving the exposed tip, resulting in increased efficiency in the operation. This model allows the assembly of large diameter and also allowing the coolant to remove all dirt particles accumulated in the welding area.



  4. CLUSTER
    It is mounted with various ferrites small diameters arranged concentrically to the central support of Impeder. Its use is an alternative to the use of ferrites with large diameters. It enables the exchange of segments without causing damage in their assembly.



  5. INTEGRAL MANDREL
    It is mounted on a rigid metal bar by preventing and threaded on both sides. The metal bar is surrounded by a ferrite material. The metal bar provides a strong connection by preventing allowing secondary operations such as removing internal internal laminations, etc..

Ferrites

The ferrites are produced with iron oxide, cobalt, nickel, manganese and zinc.

After mixed are pressed according to the desired profile. It is sintered in furnaces with controlled atmosphere at high temperatures (1200 to 1400 ° C).

Their surface finish should be polished. The result of this process is a material of high hardness and brittle.

The ideal ferrite must have a high magnetic resistance, but does not retain magnetism.

When the ferrite is exposed in the area of welding its temperature rises losing its magnetic properties.

This phenomenon is known as the "Curie point" that the higher the temperature (above 250 ° C) the better the quality of the ferrite.

FUNCTION OF FERRITE

The process of welding of tubes induced by high frequency generates a high magnetic field that induces the flow of electric current flowing through the external face of the tube near the coil.

Based on the high working frequency, the current flow goes through the outer and inner surfaces in the surface layer of the tube causing a slight penetration "SKIN EFFECT".

Most of this current flows through the inside tube heating unnecessarily around the tube.

To avoid this loss of energy and focus it solely on "V" weld is necessary to increase the impedance at the internal faces of the tube.

This is achieved using rods ferrites with magnetic properties suitable for the welding process.

MAGNETIC CHARACTERISTICS
  • Initial Permeability (μi) = 1,000 ± 25%
  • Curie Point (PC) = 250 ° C
  • Magnetic Saturation 23 ° C. Mt = 450
ZR
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FERRITE ROUND FLAT
ZRF
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FERRITE ROUND WITH PARALLEL SIDES
ZRH
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FERRITE ROUND WITH HOLE
ZRS
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FERRITE ROUND WITH STRETCH
ZRSH
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FERRITE ROUND WITH HOLES AND STRETCH

Tubos Casings

Inserts for the removal of external weld bead

Inserts for the removal of internal weld bead

Star Tecnologia provides a full range of rings made of carbide in classes and coatings appropriate for the perfect removal of the internal weld bead of ERW welded tubes.

Induction Coils

The induction coils of Star Tecnologia are designed and manufactured from special high purity copper for use in welding generators, tube and solid state.

The induction coil is an extremely important accessory for increasing efficiency in the operation of high frequency welding of tubes forming.

Star Tecnologia provides the induction coils with design itself, or according to customer's need.

Circular Knives

1. CIRCULAR KNIVES

For slitter lines of longitudinal and rotary shears. Made of forged tool steels, high speed steels, special steels and steels of NEUENKAMP high yield produced by sintering by powder metallurgy. Tolerance in thickness up to 0.002 mm. Parallelism and flatness 0.002 mm. Faces lapped and polished.

2. BONDED STRIPPER RINGS

With hardened steel core, coated with material resistant to oil and abrasion. Shore hardness according to the characteristic of the material being cut.

3. SPACERS

Hardened tool steel, ground or polished with the utmost precision. With the same tolerances, are tough measures in the faces of recording by laser inscription. Rugged corrosion through preferential treatment.

Resharping and Accessories - Slitter

Star Tecnologia along with his partner of Germany, Neuenkamp, mounted a modern center of the circular knives resharping at its plant in Brazil. Currently we provide services to major service centers in Brazil, following the rules received from Germany.

Accessories Slitter:

Consulting and training

Star Tecnologia through its division Star Training, offers its clients, projects, courses in the following areas:

- Specification of new production lines for tubes & pipes and processing of coils.
- Reviews of technological equipment and shop floor units.
- Training and capacity in operational quality and standards in the manufacture of tubes.
- Operational training - Slitter Line
- Operational training - Internal Burr Removal Tube
- Operational training – Forming Mills

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