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US 4,541,316 AGranted
Method and apparatus for cutting circular or oval pipes
AssigneePont-A-Mousson S.A.
InventorClaude Fuminier
Life of this patent
Estimating the term…
Abstract
Cutting tools 12 are individually connected in common to rollers 2b supporting a rotationally driven tube T to be cut. The tools and rollers are paired mechanically such that the cutting edge of each tool and the tangent point G between the associated roller and the surface of the tube lie in the same radial plane passing through the longitudinal axis T--T of the tube. This arrangement makes it possible to maintain constant the penetration depth of the cutting tools into the surface of the tube even if the tube is oval or elliptical.
Claims10
Apparatus for cutting tubes (T), comprising:
- a stationary frame (1) having an opening (10) through which the tube (T) to be cut lies horizontally.
- rotational driving means (3);
- a series of rollers (2aa, 2ab, 2b) fastened onto the frame (1) and the axis of each said roller being parallel to a first longitudinal axis, said longitudinal axis being parallel to the longitudinal axis of said tube, whereby said rollers support and maintain said tube at least one of said rollers being connected to said driving means and turning said tube (T) about its longitudinal axis (T--T), whereby the tube (T) remains translationally stationary;
- a lower center roller (2ab) and at least one roller being an upper side roller (2c) adjustable along an axis (x--x) perpendicular to a horizontal line lying in the axial vertical plane containing said first longitudinal axis and forming the axis of rotation (33) of said lower center roller, said perpendicular axis (x'x) being inclined (.alpha.) relative to said axial vertical plane.
- at least one cutting tool (12);
- means for adjusting said cutting tool along a first line perpendicular to and passing through said first longitudinal axis, for cutting the tube;
- a common support-piece (20) connected to said cutting tool and supporting one roller supporting said tube (2b) of said series of rollers;
- and
- means for moving said support-piece within a plane, the normal of which is perpendicular to said first longitudinal axis, said cutting tool and said one roller being mechanically paired in the direction of said first line.
6 more elements
Cutting apparatus for cutting a tube (T) having a socket (21), comprising:
- a stationary frame (1) having an opening (10) through which the tube (T) to be cut lies horizontally,
- rotational driving means (3);
- a series of rollers (2aa, 2ab, 2b) fastened onto the frame (1) and the axis of each said roller being parallel to a first longitudinal axis, said longitudinal axis being parallel to the longitudinal axis of said tube, whereby said rollers support and maintain said tube, at least one of said rollers being connected to said driving means and turning said tube (T) about its longitudinal axis (T--T), whereby the tube (T) remains translationally stationary;
- lower support rollers (23);
- an inside roller (22), said lower support rollers and said inside roller having axes located vertically lower than and parallel to said first longitudinal axis for accommodating a wall of a socket of said tube between said inner roller and said lower support rollers, said inside roller having an annular groove (22a) fashioned so as to receive the corresponding inner profile of said socket, thereby holding the socket (21) of the tube (T) against the lower support rollers (23), said lower support rollers and said inside roller supporting an end of said tube away from said series of rollers;
- at least one cutting tool (12);
- means for adjusting said cutting tool along a first line perpendicular to and passing through said first longitudinal axis, for cutting the tube;
- a common support-piece (20) connected to said cutting tool and supporting one roller supporting said tube (2b) of said series of rollers;
- and
- means for moving said support-piece within a plane, the normal of which is perpendicular to said first longitudinal axis said cutting tool and said one roller being mechanically paired in the direction of said first line.
7 more elements
Dependencies are inferred from the claim text.