grinding corrugation removed

Corrective and Preventative Rail Maintenance by Grinding …

Heavy corrective grinding > 6 mm metal removal Pre-programming of pattern (speed / pressure) required 1 x RR 64 12 passes 400 m finished / h One-pass-grinding (cyclic – preventive) 0.3mm metal removal: 2 x RR 48 1 pass 7400 m finished / h (1 x

Get Price

Head-hardened rail put to the test | News | Railway Gazette …

Hannover - Würzburg Mülmisch Brücke 6000 250 60000 Head checks & corrugation Hannover - Würzburg Burgsinn 5600 250 30000 Head checks & corrugation Table II. Mering rail grinding results Grade Passes Material Results Max depth of damage removed after grinding

Get Price

Practical Rail Grinding

Railroads embarking on a grinding program may not be able to adopt a preventive grinding strategy immediately. Often, the railroad will be struggling with a particular problem, such as corrugation, hunting, or broken rails from rolling contact fatigue.

Get Price

Techniques for Controlling Rail Corrugation

capacity, these slow orders must be removed as soon as possible. If rail grinding is not available, the rails will have to be replaced. Thus, if slow orders are not acceptable and rail grinding is not avail able, corrugation could drastically reduce vice life of rails. A ...

Get Price

Refining Approaches to Corrective and Preventive Rail …

 · Like most transit systems, BART gets precious little time for maintenance – about 90 minutes during the week and up to 4 hours on weekends. Near term, much of the grinding effort is spent chasing corrugation. But it has been effective. “We saw a 73 percent

Get Price

Rail irregularities, corrugation and acoustic ...

The irregularity at about 60 mm in pre-grind measurements may be light corrugation. Irregularities after grinding of this site are worse almost throughout the wavelength range, except insofar as the light irregularity at about 60 mm is removed. Irregularities at less

Get Price

Correlations between wear mechanisms and rail grinding …

Surface damages on rails, such as fatigue cracks [3], corrugation [4], and spalling, can be effectively removed, and the rail profile can be re-profiled after grinding [5].

Get Price

Correlations between rail wear rates and operating conditions in a …

and corrugation were found to be the most important issues the grinding procedures used during maintenance of the railroad were evaluated to assess their effectiveness on …

Get Price

THESIS FOR THE DEGREE OF PHILOSOPHY IN SOLID AND STRUCTURAL MECHANICS Rail Corrugation …

severe growth of rail corrugation with wavelengths of about 5 cm and 8 cm. About 300 days after rail grinding, the corrugation was observed to reach a constant amplitude. Based on a section removed from the corrugated rail, a laboratory investigation

Get Price

GRINDING MOTOR AND METHOD OF OPERATING THE …

 · grinding the rail for corrugation if it is determined that the corrugation attribute indicates the presence of corrugation that can be removed by grinding. 12. The method of claim 11, wherein the attribute is an amplitude of corrugation of a ...

Get Price

Some Defects in Rails

Corrugation can be removed by grinding the rail head by a fraction of a millimeter. No method has been standardized on Indian Railways to grind rail surfaces. The problem of corrugation, however, has been tackled in great detail on German Railways, where two types of equipment are normally used for rail grinding.

Get Price

Rail_corrugation_characteristics__causes__and_treatments_图文_ …

An example of grinding that has satisfactorily removed corrugation is shown in Fig. 21(a), whereas a rail on which grinding has left a severe, periodic, quasi-transverse ‘signature’ is shown in Fig. 21(b).

Get Price

(PDF) Influence of granularity of grinding stone on …

Excessive grinding heat will not only speed up the abrasive abrasion blunt, but also affect the metallographic structure of the rail [14,26]. The heat generated during the grinding process would ...

Get Price

Understanding Why, When and How Rail Grinding is Performed

– Grinding templates and patterns to address class of defects • NOT ALL DEFECTS HAVE TO BE COMPLETELY REMOVED • Important to know when to stop grinding – Do not want to grind away all of the work hardened rail head – Grinding on a regular cycle

Get Price

Correlations between wear mechanisms and rail grinding …

 · On the other hand, corrugation was not removed completely. Fig. 12 shows the analysis of the low rail of a 200 m before and after rail grinding. From the figure, it can be concluded that, after rail grinding there are still some peaks related to corrugation at

Get Price