Gear cutting – milling – or planing – Milling – Process
Patent
1997-02-18
1999-04-06
Howell, Daniel W.
Gear cutting, milling, or planing
Milling
Process
82105, 407 34, 407 42, 407 48, 409166, 409199, B23C 900
Patent
active
058908544
DESCRIPTION:
BRIEF SUMMARY
CROSS-REFERENCE TO RELATED PATENT APPLICATION
The application is based upon International Application PCT/DE95/00405, filed on Mar. 25, 1995, which claims priority based on German patent application G 94 05 317.0 U, which was filed on Mar. 29, 1994.
FIELD OF THE INVENTION
A shaping tool for the stock-removal machining of sets of rail-vehicle wheels by means of rotating tools.
BACKGROUND OF THE INVENTION
During operation the wheels of railroad rolling stock (such as locomotives and railroad cars) become worn. This wear often increases the risk of train derailment and, additionally, may accelerate wheel wear or otherwise adversely affect the running characteristics of the wheels.
The wheels of railroad rolling stock may, with wear, develop flat areas on their circumferences. Such wear often causes a bumpy or vibratory rotation of the worn wheel against the rail. Additionally, worn wheels may cause derailment of the railway vehicle.
The contours of the wheel tires of railway wheelsets are the subject of international standardization. During operation, the peripheral surfaces of such wheel tires and/or wheel rims undergo severe wear, especially from the tips of the flanges to the outside wheel-tire surfaces or the wheel-rim surfaces. Thus, especially with high-speed trains, the wheel tires and wheel rims should be reshaped to reduce or minimize the bearing or bogie loads of the rail vehicles and the concomitant wear of rail surfaces.
Railway wheelsets may be trued with stock removal carried out, e.g., by a turning or milling process. Thus, e.g., peripheral milling machines, which are adapted to remove metal by feeding a workpiece through the periphery of a rotating circular cutter (such as a milling cutter), are often used.
Additionally, cutter heads, or shell end-milling cutters which duplicate the wheel shape desired in part or whole, are often used as tools for wheel shaping. By way of illustration, U.S. Pat. No. 3,540,103 of Oliver Saari (the disclosure of which is hereby incorporated by reference into this specification) discloses a milling cutter for truing wheels of railroad cars and locomotives. The milling cutter of this patent comprises a body of substantially circular cross-section and a plurality of center buttons rigidly associated with the surface of the body, the buttons being arranged in a plurality of spaced ranks to establish a helical array of buttons about the surface of the body, wherein the buttons are spaced within such ranks that buttons which are adjacent in the helical array lie in non-adjacent ranks. A similar cutter is disclosed in U.S. Pat. No. 2,645,003, the disclosure of which is also hereby incorporated by reference into this specification.
It is an object of this invention to provide a shaping tool which is adapted to duplicate at least a portion of a wheel shape.
It is another object of this invention to provide a process for shaping the contour of a wheel which provides good efficiency and optimum chip breaking capacity while simultaneously maximizing tool life.
It is yet another object of this invention to provide a process for shaping the contour of a wheel which provides high surface finish of the wheel with substantially no shape distortion.
SUMMARY OF THE INVENTION
In accordance with the invention, there is provided a shaping tool for the stock-removal machining of wheelsets. The tool contains a shell-end milling cutter comprised of a disc-shaped body with a multiplicity of cutting edges which overlap each other and are disposed spirally staggered on pitch circles on such disc-shaped body.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be more fully understood by reference to the following detailed description thereof, when read in conjunction with the attached drawings, wherein like reference numerals refer to like elements, and wherein:
FIG. 1 is a top view of the end face of one preferred cutter of this invention;
FIG. 2 is a partial sectional view of the cutter of FIG. 1;
FIG. 3 is a partial schematic view of the cutter of FIG. 2;
FIG. 4 is
REFERENCES:
patent: 234635 (1880-11-01), Wenchel
patent: 1472960 (1923-11-01), Conklin
patent: 3116538 (1964-01-01), Severson
patent: 4352609 (1982-10-01), Hopkins
patent: 4789273 (1988-12-01), Wiacek et al.
patent: 4808044 (1989-02-01), Tsujimura et al.
patent: 4995767 (1991-02-01), Segal
patent: 5425603 (1995-06-01), Dutschke et al.
patent: 5678963 (1997-10-01), Heimann
patent: 5678966 (1997-10-01), Heimann
Hermann Ross
Lutze Hans
Naumann Hans J.
Robotta Reinhard
Greenwald Howard J.
Howell Daniel W.
Kirkman Christopher
Niles-Simmons Industrieanlagen GmbH
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