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Ultrasonic Needle Straightening or Forming:

 

Straightening operation usually consists in achieving the designed shape of a metallic component or structure (Here a thin sheet). This operation could be done using heavy load pressing machines. For finition tasks, or when a distorsion is observed after a machining or a chemical process, to achieve with precision the curvature of a part by compring it to the jig, most common tool is a simple peen hammer.

Using such a tool implies a long process time, and could cause musculo-skeleton diseases for the operators.

 

Ultrasonic Needle Straigthening technique is a proven and reliable alternative of the peen hammer, with less impact for the operator.

Efficient process control, quick and easy-to-use tooling make this new technique popular.Needle_Peening.JPG

 

Forming operation consists in modifying the shape of a metallic sheet to progressively achieving a desired shape.

 

Following schematics describes the Ultrasonic Straightening or Forming process principle:

 

Needles guided inside the peening head acquire velocity on the vibrating sonotrode and shock the metal to treat. A compressive stress layer is created on the surface. The difference of stresses between the surface and the core of the metal sheet result in a sheet curvature modification. By peening on the appropriate areas, one could adjust the part shape to its objectives (jig).

 

youtube SONATS' channelWatch videos from our Ultrasonic Needle Straightening playlist on YouTube.