Method and apparatus for controlling abrasive flow machining
AssigneeExtrude Home Corporation
InventorRobert E. Williams
Life of this patent
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Abstract
A method for controlling the abrasive machining, especially abrasive flow machining of a part which includes measuring any acoustic emission signal caused by the abrasive machining of such part; thereafter comparing a high frequency, e.g. greater than 100 kHz, component of said signal with a low frequency, e.g. less than 100 kHz, component of said signal to generate a control ratio. When the control ratio reaches a predetermined ratio, or predetermined change in the ratio over time, a control action of the machining process is effected, such as termination of the flow of abrasive.
Claims13
A method for controlling the abrasive machining of a part comprising:
- a. measuring any acoustic emission signal caused by the abrasive machining of said part;
- b. comparing a high frequency component of said signal with a low frequency component of said signal;
- and
- c. controlling said machining based upon a predetermined ratio of said components.
A method for controlling the abrasive machining processing of a part comprising:
- a. measuring an acoustic emission signal caused by the abrasive machining of said part;
- b. comparing a high frequency component of said signal with a low frequency component of said signal;
- and
- c. controlling said machining based upon a predetermined change of the ratio of said component over time.
A method for controlling the abrasive machining of a part comprising:
- a. measuring an acoustic emission signal caused by the abrasive machining of said part;
- b. dividing said signal into various band-pass frequency components;
- developing arithmetic combinations of said frequency components;
- and
- c. controlling said machining by selecting a control action based upon the behavior during time of said arithmetic combinations.
Dependencies are inferred from the claim text.