Cutting – Processes – Cutting wall of hollow work
Patent
1997-07-11
2000-06-13
Dexter, Clark F.
Cutting
Processes
Cutting wall of hollow work
83178, 83184, 269 47, B26D 316, B23D 2100
Patent
active
060735260
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method for cutting preferably metal reinforced hoses, metal pipes or similar, and a device for utilization of the method.
PRIOR ART
Cutting, for example, of hydraulic hoses in desired lengths is today normally performed by means of machinery having conventional cutting discs, which result in particles from the cut off hose being caught in the end portions of the hose adjacent to the cut surfaces. With regard to metal particles originating from the cut metal reinforcement, same have a high temperature when released during the cutting operation, and as a result, same can penetrate and be "melted" to the internal surface of the hose. In order to clean a cut off hose portion cut from particles released during the cutting operation, through blowing by means of air or high pressure cleaning with liquid is used, time and cost consuming operations which do not ensure complete security for complete cleaning of a cut off hose portion. This relates particularly to metal particles which completely or partly are embedded adjacent to the internal surface of the hose, and which later under use of the hose may be released and follow an enclosed hydraulic medium to piston cylinders, pumps, valves and other parts of a hydraulic system, thereby causing uncalled large damage through wear. The equipment required for high pressure cleaning is also expensive, and results in that cutting of hydraulic hose normally can not be carried out by a user.
SUMMARY OF THE INVENTION
The object of the present invention is to disclose a method for cutting preferably metal reinforced hoses, metal pipes or similar, avoiding the above discussed disadvantages. The method and the device according to the invention remove substantially completely the risk for penetration of non-desirable particles by the end portions formed at a cutting point, and the cut portion remaining by the stored part of the hose after cutting can be given a means of protection against penetration from outside particles during a subsequent storage period. Furthermore, the method and device according to the invention facilitate that previous clean blowing and washing operations are no longer required, whereby a user is offered a possibility to himself perform cutting of desired lengths.
In the method according to the present invention for cutting preferably metal reinforced hoses or similar, the cutting operation is performed in a conventional way using a cutting tool, such as a motor driven cutting disc or similar, the method according to the present invention being substantially characterized in that a means as a first step is located surrounded by the element to be cut in a central position in relation to the point where cutting is intended to be performed, that said means is arranged to take up intimate contact with the internal surface of the element by at least two individually separated areas at each side of the cutting point, that cutting is thereafter performed through the element as well as the surrounded means, and that as a final step from each other separated parts of the surrounded means are extracted from the element in direction towards the end portions formed by the cutting operation.
The device for utilization of the method according to the. present invention is mainly characterized in that the means to be located by the point where cutting is intended to be performed includes a central body, having an external diameter corresponding to or smaller than the internal diameter of the element to be cut off, each side including a group with one or a number of resiliently flexibly deflecting circular flanges having a diameter corresponding or slightly exceeding said internal diameter, at least one end portion of the means; being arranged with a preferably centrally located means for guidance or engagement with a device which by means of pushing or pulling influence is intended to locate the means in a central position in relation to the point where the element is intended to be cut.
BRIEF DESCRIPTION OF TH
REFERENCES:
patent: 4059036 (1977-11-01), Hartley
patent: 4467508 (1984-08-01), Fjallstrom
patent: 5592741 (1997-01-01), Vassar
patent: 5675096 (1997-10-01), Hydemann et al.
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