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MANAGEMENT OF RAIL PROFILES THROUGH RAIL GRINDING

M D Roney, J Kalousek, P Sroba

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Abstract

As railways move from corrective to preventive rail grinding, with the increased grinding frequencies that this entails, rail grinding patterns must produce more subtle control of rail shape while grinding at speeds in the 4-6 mph range. This paper proposes that rail be preventatively ground to a series of optimal rail profiles that minimize contact stresses by matching worn wheels, while promoting vehicle tracking and protecting against high stress contact. These optimal rail profiles will vary with predominant wheel profile, gauge condition and rail metallurgy. Any increased precision in the matching of wheel/rail profiles must be driven by more sophisticated planning of the grind. This paper discusses the parameters that must be measured to control rail shape, and discusses technologies that are capable of performing these measurements.

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What this paper is about

As railways move from corrective to preventive rail grinding, with the increased grinding frequencies that this entails, rail grinding patterns must produce more subtle control of rail shape while grinding at speeds in the 4-6 mph range. This paper proposes that rail be preventatively ground to a series of optimal rail profiles that minimize contact stresses by matching worn wheels, while promoting vehicle tracking and protecting against high stress contact. These optimal rail profiles will vary with predominant wheel profile, gauge condition and rail metallurgy. Any increased precision in the matching of wheel/rail profiles must be driven by more sophisticated planning of the grind. This paper discusses the parameters that must be measured to control rail shape, and discusses technologies that are capable of performing these measurements.

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Available abstract

As railways move from corrective to preventive rail grinding, with the increased grinding frequencies that this entails, rail grinding patterns must produce more subtle control of rail shape while grinding at speeds in the 4-6 mph range. This paper proposes that rail be preventatively ground to a series of optimal rail profiles that minimize contact stresses by matching worn wheels, while promoting vehicle tracking and protecting against high stress contact. These optimal rail profiles will vary with predominant wheel profile, gauge condition and rail metallurgy. Any increased precision in the matching of wheel/rail profiles must be driven by more sophisticated planning of the grind. This paper discusses the parameters that must be measured to control rail shape, and discusses technologies that are capable of performing these measurements.

Key concepts: Grinding, Grind, Automotive engineering, Engineering, Matching (statistics), Third rail, Gauge (firearms), Mechanical engineering

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