Method for controlling the weight correction of workpieces prior to finish-machining
AssigneeFirma Carl Schenck AG
InventorHeinrich Hack
Life of this patent
Estimating the term…
Abstract
In the weight correction of workpieces prior to finish-machining, such as connecting rods, the dimensions of the pre-machined surfaces are measured and employed as a factor in the adjustment of the machine tool for weight correction of the workpieces, for example, by machining material off or adding material onto the workpiece, so that the workpiece will have the desired weight characteristics after final machining.
Claims5
In a method for correcting the weight of a connecting rod to produce a close tolerance finished weight of said rod which has a bore in each rod end, wherein a preliminary machining permitting wide tolerances and a finish operation are performed to vary the weight of the connecting rod to produce said finished weight, the improvement comprising boring said bores to a wide preliminary tolerance, weighing said connecting rod after said preliminary boring but prior to said finish operation to produce a measured weight representing signal, measuring the diameter of said preliminarily bored end bore to produce a measured bore diameter signal, comparing said measured bore diameter representing signal with a rated bore diameter signal to provide a diameter difference signal, producing a correction signal by combining said measured weight representing signal and said diameter difference signal, producing a control signal modified in response to said correction signal and performing said finish operation in response to said modified control signal whereby said finished weight is independent of any variations in said wide preliminary tolerance.
Dependencies are inferred from the claim text.