Cutting – Processes – With subsequent handling
Patent
1993-10-18
1996-01-02
Jones, Eugenia
Cutting
Processes
With subsequent handling
83 54, 83165, 834091, 834117, 83733, 834671, B23D 2104, B23D 4704
Patent
active
054798396
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method and machine for cutting pipes, or piping, and then particularly for cutting welded pipes, or piping, in the vicinity of a pipe welding machine.
2. Description of the Prior Art
Pipe welding machines for continuously welding pipes, or tubes, have undergone very rapid development in recent years, and present day welding machines are capable of handling 200 m of piping, per minute in the case of piping of smaller dimensions, and can be expected to reach a future capacity of up to 300 m of welded piping, or tubing, per minute.
For reasons of productivity, it has been found advangeous, and in many cases even necessary, to effect at least one cutting operation in direct connection with the welding machine, and in order not to limit the capacity of the welding machine in this case, the cutting equipment used must have at least the same capacity as the welding machine, although pipe cutting equipment which will satisfy these capacity requirements is not yet commercially available.
SUMMARY OF THE INVENTION
It is therefore the object of this invention to solve the aforesaid problem and to provide a pipe cutting method and a pipe cutting machine which will enable piping, or tubing, to be cut in direct connection with welding machines without reducing the capacity thereof, i.e. at a rate which corresponds at least to a pipe welding capacity of up to 300 m of pipe per minute, or higher.
This object is achieved with the method and machine according to the invention, having the characteristic features set forth in the following claims.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail with reference to the accompanying drawings, in which
FIGS. 1 and 2 illustrate schematically a side view and a top view respectively of an inventive pipe cutting machine,
FIG. 3 is a section view of a cutting unit included in the cutting machine, said view being taken generally on the line III--III in FIG. 1;
FIG. 4 is a view from above taken generally on the line IV--IV in FIG. 3;
FIG. 5 is an enlarged view of a feeder included in the machine, said view being taken generally on the line III--III in FIG. 1;
FIG. 6 is a sectional view taken generally on the line VI--VI in FIG. 1;
FIG. 7 is a sectional view taken generally on the line VII--VII in FIG. 5; and
FIG. 8 is a section view of part of a jaw chuck included in the arrangement .
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The illustrated cutting machine includes at least one cutting unit, generally referenced 1, and a plurality of support trestles 2 on each side of the cutting unit 1, wherein the support trestles on the left of the cutting unit in FIG. 1 have a left-hand design, while those located on the right of the cutting unit have a right-hand design. The number of support trestles 2 each side of a cutting unit 1 may vary, and the number used will depend on the length of the piping to be cut, which may be in excess of 20 m, and on the mutual spacing between trestles 2 and between cutting units 1 and adjacent trestles 2, this distance being adjusted in relation to the wall thicknesses of the piping to be cut, so that the piping will show no tendency to sag between the trestles 2 and between cutting unit 1 and adjacent support trestles 2.
The trestles 2 and each cutting unit 1 included in the machine are arranged in a line beside one another on a foundation 3, which stationarily supports two mutually parallel guide rails 4 and 5 which extend along a major part of the length of the foundation and which coact with respective carriage wheels or rollers 6 and 7 of each cutting unit 1 and support trestle 2. The carriage wheels referenced 7 are arranged in pairs at both the forward and the rearward part of respective cutting units 1 and support trestles 2 with the axles of said wheels defining an angle therebetween, for instance a right angle, so as to abut upwardly facing guide surfaces 8 of that one of the two guide rails which has two opposing corners
REFERENCES:
patent: 2123580 (1938-07-01), Wheless
patent: 2559378 (1951-07-01), Stalder
patent: 3141482 (1964-07-01), Arness
patent: 3908495 (1975-09-01), Bush, Jr. et al.
patent: 4031788 (1977-06-01), Boge et al.
patent: 4515196 (1985-05-01), Shields
patent: 4732066 (1988-03-01), Del Fabro et al.
patent: 4957022 (1990-09-01), Harris
Jones Eugenia
Lezdey John
Renholmens Mekaniska Verkstad AB
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