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US 4,115,857 AGranted
Process and apparatus for on-track truing of the heads of rails of a railway
AssigneeSpeno International S.A.
InventorRomolo Panetti
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AssigneeSpeno International S.A.
InventorRomolo Panetti
Estimating the term…
A process and apparatus for on-track truing of the surface of the head of rails of a railway wherein a predetermined number of truing tools, oriented along tangents to the profile of the head, are moved along generatrices of the surface and wherein the value of at least one of the parameters influencing the metal-removing capability of at least one truing tool is under the control of a control value which is preestablished as a function of the desired cutting depth of the tool. At least one magnitude value representative of the state of the rail head before truing is measured by a measuring device at the front of a truing vehicle and the control value is determined as a function of the measured value and of the known values corresponding to the metal-removing capability. The control value is adjusted according to the results obtained at the end of a rail length corresponding at least to the length of the entire assembly of truing tools utilized.
In a process for on-track truing of the surface of the head of rails of a railway wherein a predetermined number of truing tools, oriented along tangents to the profile of said head, are moved along the genratrices of said surface, and wherein the value of at least one of the parameters influencing the metal-removing capability of at least one truing tool is under the control of a control value which is pre-established as a function of the desired cutting depth of said tool, the improvement comprising measuring at least one magnitude value representative of the state of the rail head before truing, determining the control value to be set in order to effect at least one of (a) the desired cutting depth of said tool, (b) the position of said tool as a function of the measured value of said magnitude and of the known values corresponding to its metal-removing capability;
In apparatus for on-track truing of the surface of the head of rails of a railway comprising at least one grinding vehicle including a pre-determined number of tools for truing the head of the rails, a feed and control circuit connected to said tools and comprising means for controlling the value of at least one parameter depending from said circuit and influencing the metal-removing capability of at least one truing tool according to a control value which is preestablished as a function of the desired cutting depth of said tool, and means for setting said control value, the improvement comprising means positioned in front of the truing vehicle for measuring at least one of (a) the mean amplitude (a.sub.1) of undulatory deformations of short wavelength, (b) the amplitude (A.sub.1) of undulatory deformations of long wavelength, and (C) the amplitude (.pi..sub.1) of defects in the profile of the head of the rails and for generating an output signal representative of the value of said amplitude, means for setting said value of the amplitude, and means for setting known values corresponding to the metal-removing capability of the tool in question, the control value of the selected parameter to obtain the cutting depth desired and/or the position of said tool being determined as a function of the value of the amplitude set and of the metal-removing capability values set.
Dependencies are inferred from the claim text.