Method for final balancing a brake drum
AssigneeDayton-Walther Corporation
InventorsJay K. Julow, Robert A. DeRegnaucourt, John C. Hall
Life of this patent
Estimating the term…
Abstract
An improved method for final balancing the brake drum determines the location and length of a constant depth cut along the squealer band which is necessary to correct the imbalance, and using a cutting machine, makes the constant depth cut at the predetermined location and for the predetermined length along the squealer band to produce a final balanced brake drum. Preferably, the cutting machine is a milling machine which produces a plunge type entrance/exit cut. It is a further feature of the invention to provide a feather type entrance/exit cut to reduce the stress concentrations, and produce a cosmetically more appealing final balanced brake drum.
Claims20
A method for producing a final balanced brake drum comprising the steps of:
- (a) providing a brake drum including a generally cylindrical body provided with an integral raised squealer band, the squealer band having an outwardly facing surface initially machined to a predetermined diameter around its entire circumference, the brake drum having the initially machined squealer band incorporating an unacceptable imbalance;
- (b) determining balancing specifications consisting of the location, length, and depth of a circumferentially extending substantially constant depth cut which extends along a predetermined length of the squealer band and which is necessary to correct the imbalance:
- (c) positioning the brake drum on a cutting machine;
- (d) operating the cutting machine to make the constant depth cut along the squealer band in accordance with the balancing specifications determined in step (b) to thereby produce a final balanced brake drum.
A method for producing a final balanced brake drum comprising the steps of:
- (a) providing a brake drum including a generally cylindrical body provided with an integral raised squealer band, the squealer band having an outwardly facing surface initially machined to a predetermined diameter around its entire circumference, the brake drum having the initially machined squealer band incorporating an unacceptable imbalance;
- (b) determining balancing specifications consisting of the location, length, and depth of a substantially constant depth cut along the squealer band which is necessary to correct the imbalance;
- (c) positioning the brake drum on a cutting machine;
- (d) subsequent to step (c), measuring the outer diameter of the squealer band near the location of the imbalance and thereafter, determining the balancing specifications as a function of the outer diameter;
- and
- (e) subsequent to step (d), operating the cutting machine to make the constant depth cut along the squealer band in accordance with the balancing specifications determined in step (b) to thereby produce a final balanced brake drum.
A method for producing a final balanced brake drum comprising the steps of:
- (a) providing a brake drum including a generally cylindrical body provided with an integral raised squealer band, the squealer band having an outwardly facing surface initially machined to a predetermined diameter around its entire circumference, the brake drum having the initially machined squealer band incorporating an unacceptable imbalance;
- (b) positioning the brake drum on a balancer;
- (c) determining the location and amount of the imbalance relative to a predetermined fixed reference point on the brake drum;
- (d) providing a reference mark on the brake drum at the predetermined reference point;
- (e) transferring the brake drum to a cutting machine which includes a reference mark;
- (f) positioning the brake drum on the cutting machine such that the reference mark on the brake drum is aligned with the reference mark of the cutting machine;
- (g) measuring the outer diameter of the squealer band near the location of the imbalance;
- (h) determining as a function of the outer diameter of the squealer band, balancing specifications consisting of the location, length, and depth of a substantially constant depth cut along the squealer band which is necessary to correct the imbalance;
- and
- (i) operating the cutting machine to make the constant depth cut along the squealer band in accordance with the balancing specifications determined in step (h) to thereby produce a final balanced brake drum.
Dependencies are inferred from the claim text.