METHOD OF PRE-MILLING OF RAILHEAD PROFILE AND MILLING TOOL FOR PRE-TREATMENT OF RAILHEAD PROFILE Russian patent published in 2010 - IPC E01B31/13 

FIELD: engineering industry.

SUBSTANCE: method of pre-milling of railhead profile with assembled milling tools includes removal of metal flow on radial part from the side of past non-working edge of railhead; at that, profile of the shaped surface is determined from condition of uniformity of radial component of cutting force at fine milling. Milling tool for pre-milling is equipped with replaceable many-sided plates (MSP) which are located on the housing at λ angles to axis of milling tool, and milling tool is installed at an angle relative to rail symmetry axis and at an angle to supply direction. At that, cutting edges of replaceable many-sided plates are located on the milling tool housing at φ angles (plan trail angle) to treated profile for providing rational values of λ angles, after that shaping of this profile is performed with concave generating lines which are formed during rotation of replaceable many-sided plates with straight-line cutting edge.

EFFECT: reducing vibrations of milling process, improving quality of treated surface and stability of the tool.

1 dwg