Metal deforming – By use of tool acting during relative rotation between tool... – With cutting of work or product
Patent
1989-05-30
1990-09-04
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
With cutting of work or product
82 46, B21D 1902
Patent
active
049533770
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to a method and an apparatus for cutting and deburring tubes, and the invention is more particularly directed to such a method and such an apparatus in which a base tube is cut and deburred in a machine comprising two carrier jaws, a cutting means and a deburring means, whereby the cutt1ng and the deburring of the base tube follow in a continuous operation, preferably without the need of removing the tube from the cutting and deburring machine during said workings.
2. Description of the Related Art
In previously known apparatus the cutting of the tube and the deburring of the cut tube ends generally have been made in two separate operations and in two separate machines. This necessitates some work with transportation and eventually an intermediate storing of the tubes, and with mounting of the cut off tube parts in a deburring machine after the base tube has been cut into tube pieces. It may also involve some problems to maintain predetermined tolerances.
SUMMARY OF THE INVENTION
The object of the invention therefore is to solve the problem of suggesting a method and an apparatus for cutting and deburring tubes and cut off tube pieces respectively in a continuous operation in a machine comprising a cutting means and a deburring means and two carrier jaws, at least one of which is movable in relation to the other, and in which the cutting and deburring according to the invention is made with the tube, or the cut off tube piece respectively, continuously clamped by the jaws.
In an embodiment of the invention the cutting and deburring is made according to the following cycle of operation:
a base tube is fed from an input side of the machine through a first jaw and as far as to a stop means of a second jaw;
the jaws are closed thereby clamp locking the tube;
a cutting means is folded down against the tube and cuts same at a predetermined position in relation to the two jaws;
the second jaw together with the cut off tube piece is displaced a predetermined distance axially apart from the first jaw;
the cutting means is withdrawn from the cutting position, and a double acting deburring means is moved into deburring position between the front end of the base tube and the rear end of the cut off tube piece;
the deburring means is activated at the same time as the second jaw, by a predetermined biasing force, is moved into contact with the deburring means which is thereby, in turn, moved into contact with the front end of the base tube, and the two tube ends are deburred concurrently;
the cut off and deburred tube piece is removed;
the jaws are unclamped and a new cycle of operation including cutting and deburring is started.
Further characteristics of the invention and advantages thereof will be evident from the following detailed specification in which reference will be made to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings FIG. 1 diagrammatically shows a machine for executing the method according to the invention.
FIG. 2 is a perspective view of practical embodiment of a machine according to the invention.
FIGS. 3, 4 and 5 illustrate, fragmentary, perspective views of the machine of FIG. 2 at three different steps of the method according to the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The machine diagrammatically shown in FIG. 1 generally comprises a cutting means 1, a deburring means 2 and two carrier jaws 3 and 4, at least one of which--in the illustrated case the right jaw 4--is movable in relation to the left jaw 3 and coaxially therewith. The two jaws are operated by means of servo motors 5 and 6 (just intimated), preferably hydraulic pistons, and likewise the right jaw 4 is operated for its axial displacement to and from the fixed jaw 3 by means of a servo motor like an air piston 7. The entire apparatus is mounted on a support 8.
The cutting means 1 comprises a motor 9 which drives a cutting blade or saw blade 10, preferably over a gear drive (not shown). The cutti
REFERENCES:
patent: 3196651 (1965-07-01), Karrberg et al.
patent: 3563119 (1971-02-01), Shashaty
patent: 4052822 (1977-10-01), Obear
patent: 4467508 (1984-08-01), Fjallstrom
Boxholm Produktion AB
Larson Lowell A.
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