• Broaching is a cutting process for the production of inner and outer profiles using a shaped tool with a linear movement.

 

• The broaching tool has the same final shape as the workpiece profile that has to be realized.

 

• During the broaching process each tooth progressively removes material until the final shape of piece is achieved.

 

• All operations (roughing and finishing) are processed in a single step.

 

• Broaching process is recommended for mass production with the main advantage of achieving a constant quality.

 

• Broaching operation can be an alternative in many cases to milling, drilling, turning, grinding and EDM technologies.

 

• The main requirements in broaching process are : the part surface must be parallel to the direction of the tool axis, the part must be conveniently located in a fixture and the tool must be able to pass completely in the piece.

 

Domains of application:

• Broaching of helical or straight internal profile.

 

• Broaching of keyway profiles.

 

• Broaching of parts after heat treatment using a high speed broaching process.

 

• Dry or minimal lubrification broaching process.

 

• Broaching of varius external profile.

 

• Broaching of turbine(fir tree) and compressor(dovetail) profiles for aeronautics and energy applications.

 

• POT broaching for external splines.

 

Varinelli can provide and give references for all of these applications.