Schumm
Mechanical
- Feb 3, 2005
- 1
During the assembly of one of our machinery products that has a cast iron housing, occasionally one of the hidden internal components is accidentally omitted. The sub-assembly at this point in the manufacturing process is already bolted to a larger assembly, all of which is suspended vertically, has a vertical length of 18 inches and a total weight of 93 lb. (+ or - 2 lb.) We would like to detect any ommission of this component and then rework the sub-assembly if required.
Should I be able to check the resonant frequency of a known good assembly and use it as a standard for checking the resonant frequencies of other production assemblies, in order to confirm that they do not have this component missing? (I might add that the resonant frequency of the 93 lb. assembly is in the neighborhood of 500 hertz, and the weight of the sometimes missing steel component is 1.4 lb. (+ or - .05 lb.). If this is feasible, and for a production quantity of 7,000 units annually, what types of vibration testing equipment do I need?
Should I be able to check the resonant frequency of a known good assembly and use it as a standard for checking the resonant frequencies of other production assemblies, in order to confirm that they do not have this component missing? (I might add that the resonant frequency of the 93 lb. assembly is in the neighborhood of 500 hertz, and the weight of the sometimes missing steel component is 1.4 lb. (+ or - .05 lb.). If this is feasible, and for a production quantity of 7,000 units annually, what types of vibration testing equipment do I need?
