Method of balancing a rotatable element

Details Method of balancing a rotatable element Method of balancing a rotatable element

1978-05-04

1979-10-09

Mack, John H.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204218, 204224M, 20412946, B23P 102, C25F 700

Patent

active

041705289

ABSTRACT:
The disclosure illustrates a method and apparatus for precision balancing a rotatable element such as the turbine shaft assembly of a turbocharger. The turbine-shaft assembly is placed in a machine that detects the position and degree of unbalance. The material contributing to the unbalance is then removed from the wheel using electrochemical machining in which material is removed from the turbine through anodic dissolution of the turbine wheel material by passage of a current through a conductive work piece and electrolyte to the wheel. A means is provided to indicate the time integrated current flow of the electrochemical machining process. The time integrated current flow is related to unbalance units so that the electrochemical machining is terminated when the desired amount of mass is removed to achieve balance by reaching the determined time integrated current flow.x

REFERENCES:
patent: 3301776 (1967-01-01), Hughes
patent: 3827963 (1974-08-01), Callahan

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