EF Tools for concave fillets (internal and external)

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Burnishing

EF Deep Rolling Tools

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EF Tools for concave fillets (internal and external)

Deep rolling induces residual compressive stresses in the boundary layers At the same time through plastically shaping, the fatigue strength is increased and the surface smoothened. With certain limitations, residual stresses as well as dislocation densities are able to be specifically controlled through the process parameters and design of tool. For this reason deep rolling represents an efficient process for increasing the strength of highly stressed components.

ECOROLL deep rolling tools improve components for the following industries:

  • Engineering.
  • Chemical industry / oil industry (stress corrosion).
  • Energy industry (turbines, wind power stations, combustion engines)
  • Aeronautics.
  • Road and rail vehicle construction.


In addition, deep rolling tools machine internal and external concave fillets, contours and thread root radii.

  • For use on CNC turning, drilling, milling machines and machining centers, or on conventional machine tools.
  • Short primary processing times, machining in one chucking
  • Reliable method
  • Great precision
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  • For use on conventional or CNC lathe.
  • Complete machining with one chucking.
  • Can be used as right or left-handed tool.
  • Both directions of rotation possible.

Characteristics:

  • For machining of turned parts' fillets, like shafts, screws, tension bars, torsion bars.
  • Deep rolling by plunging method.
  • A floating roller.
  • Rolling force monitoring with gauge or inductive position measuring system.

Basic construction:

  • Type EF deep rolling tools consist of a tool body equipped with a shank, a spring assembly that allows the roller head to move with no play and very low friction, and a dial gauge that indicates the burnishing force as measured by spring defl ection.
  • An optional device transmits the values by cable or wireless signal to an external indicator.
  • The roller head is attached to the flexible, spring-loaded section of the tool body. The flexible roller retainer moves in response to the radial or axial rolling forces on either side of the tool.
  • The roller is guided by a cage and supported by a support body with large-scale needle bearings.

Characteristics:

  • Deep rolling of thread root radii (external).
  • Deep rolling in the machine's thread-cutting cycle.
  • Axially floating roller provides compensation of minor positioning errors.
  • Automatic angle adjustment of the roller for differing gradients.
  • Machining of right or left-hand threads with no alterations required.

Basic construction:

  • Type EF deep rolling tools consist of a tool body equipped with a shank, a spring assembly that allows the roller head to move with no play and very low friction, and a dial gauge that indicates the burnishing force as measured by spring deflection.
  • An optional device transmits the values by cable or wireless signal to an external indicator.
  • The roller head is attached to the flexible, spring-loaded section of the tool body. The flexible roller retainer moves in response to the radial or axial rolling forces on either side of the tool.
  • The roller is suspended within the roller retainer with a slide bearing bolt. In addition, the roller mount swings such that the roller automatically adjusts to the thread pitch. A set screw limits the roller’s pivoting angle.

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