Drilling machines

Details Drilling machines Drilling machines

1988-10-26

1990-03-27

Howell, Daniel

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

Frictionally engaging sides of opening in work

408 97, 408 99, 408103, B23B 4100

Patent

active

049115871

ABSTRACT:
A drilling machine for drilling holes in the ends of rails for a railway track to receive fishplate bolts, has a base 12 on which is provided a former 20 adapted to the profile of the rail 10. A clamping jaw 18 is connected by a clamping mechanism 16 for clamping the base 12 to the rail. An electric drill 20 is slidably supported on a column 14 on the base 12. An annular hole cutter 26 on the drill spindle 24 drills a hole through the web 40 of the rail 10. The former 30 accurately locates the drilling axis laterally with respect to the rail 10 and a respective end of the former 30 can be aligned with the rail end when clamping the machine to the rail in order that the drill axis will be accurately located longitudinally of the rail.

REFERENCES:
patent: Re28416 (1975-05-01), Hougen
patent: 1178567 (1916-04-01), Wuerpel
patent: 3945749 (1976-03-01), McIlrath
patent: 4474514 (1984-10-01), Jensen
patent: 4500081 (1985-02-01), Carossino
patent: 4753556 (1988-06-01), Solko

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