TAM Processing Characteristics TAM produces an entirely different and unique surface condition. One of the reasons for this is the multidirectional and rolling nature of abrasive particle contact with part surfaces. Unlike surface effects created with pressure or impact methods such as air or wheel blasting, TAM surfaces are characterized by a homogeneous, finely blended, abrasive pattern developed by the nonperpendicular nature of abrasive attack. Unlike wheel or belt grinding, surface finishes are generated without any perceptible temperature shift at the area of contact and the micro-textured random abrasive pattern is a much more at- tractive substrate for subsequent coating operations than linear
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wheel or belt grinding patterns. TAM processes have strong ap- plication on certain types of parts that have critical metal surface improvement requirements of a functional nature. Significant metal surface integrity and improvement has been realized in processes with both abrasive and nonabrasive media. As a result of intense abrasive particle contact with exposed features, it has been observed that residual compressive stresses of up to 400–600 MPa can be created in selected critical areas. Tests performed on rotating parts for the aerospace industry that were processed with this method demonstrated a 40–200% increase in metal fatigue resistance tested under working conditions, when compared with parts that had been deburred and edge finished with less sophisticated manual treatment protocols. Significant process characteristics to keep in mind include (1) very rapid cycle times; (2) a high-intensity, small media operation that allows for access into intricate part geometries; (3) a completely dry operation; (4) metal surface improvement effects: including isotropic, negatively skewed surfaces with improved bearing load ratio and contact rigidity (5) no part- on-part contact; (6) modest tooling requirements; (7) primarily an external surface preparation method some simpler interior channels can also be processed, and (8) many types of rotating components can be processed and non-rotational components can also be processed when attached to disk like fixtures. ME
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Precision Rotary Tables
World-class ULTRARONTM and ULTRADEXTM Rotary Tables
Inspection • Radial Milling • Calibration Index Position • Contouring • Circle Division 4th
-5th -Axis Machining Manual and Automatic Systems
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