IE903260A1

IE903260A1 - Device for the simultaneous processing of workpieces passed¹at an even rate in one direction, using a plurality of¹liquid jet cutting tools

Info

Publication number: IE903260A1
Application number: IE326090A
Authority: IE
Original assignee: Pelzer Helmut
Priority date: 1989-09-08
Filing date: 1990-09-07
Publication date: 1991-04-10
Also published as: EP0418474A1; PT95235A; KR910005964A; DE3929908A1; JPH0398798A

Abstract

To increase the treatment accuracy and the treatment speed with liquid jet cutting tools, a plurality of tools (1, 2, 3, 4) are arranged space-fixed one behind the other in the direction of movement of the workpieces (14). At the same time, the distribution of the tools (1, 2, 3, 4) in their mounting plane is adjustable. They are preferably situated on the inner ceiling of a channel which consists of a plurality of housing elements (9, 10, 11, 12) and through which the workpieces are guided.

Description

go) bo This invention relates to a device for the simultaneous processing of workpieces passed at an even rate in one direction, using a plurality of liquid jet cutting tools.

A device is known from German Utility Model 87 10 495 in which, in a first working step, a continuous belt is divided into individual strips by a tool of the above type in a direction perpendicular to its direction of motion, the edges of which strips are trimmed by two laterally disposed tools in a second working step. For this purpose the three tools are mounted on a slide, which runs along with and at the same speed as the belt during the first working step, and which returns to its original position, against the direction of motion of the belt, during the second working step.

It is apparent that a device of this type has considerable disadvantages. The processing rate is restricted from the outset by the limited speed of the slide travelling to and fro. The mounting of the tools on the slide, which slide of course also moves during operation, is necessarily unstable and causes imprecision in the cut. Furthermore, the movement of the tools during operation necessitates a special arrangement of the devices producing the pressurised jet and flexible feed lines for the liquid, which brings with it additional difficulties .

The object of the invention is to propose a device of the type mentioned in the introduction which allows a higher processing rate, more precise cutting and operationally stable generation and forwarding of the liquid jet.

This object is achieved in accordance with the invention in that the tools are fixedly disposed one after the other in the direction of motion of the belt of moving workpieces, and that each tool always processes the same part of each workpiece, in the manner of conveyor belt processing.

The particular advantage of the device of the invention can be seen in that the tools are fixedly disposed. This ensures that the individual tools do not impede one another, even when the individual tool is moved in space, that substantially more accurate cutting can be achieved as a result of their stable mounting and that they can be fed with the liquid via fixedly installed conduits.

Furthermore the device according to the invention allows the processing rate to be increased substantially. This is especially the case when, for example, a continuous cut is to be made in a continuous web of material. While the first tool in the direction of passage carries out the first part of the cut, the second tool separates the second part off. In this manner the rate of passage can be doubled and the number of partial sections can be increased until the greatest possible length of cut in unit time for the tools used is reached. For cuts of complicated contour, this method allows sub-division of the individual parts of the cut and their allocation to the individual tools to be achieved more easily.

The multi-faceted applicability of the device according to the invention can be further increased, in further development of the invention, by the selective or simultaneous use of the following measures: the tools arranged one after the other are perpendicularly offset with respect to the belt of moving workpieces; the spatial arrangement of the tools can be altered; the tools can be caused to rotate and/or to move in a vertical plane at their respective locations. In these cases, the devices producing the pressure jet may be associated with the housing elements.

It is particularly advantageous for each tool to be individually hung from the top surface of a housing of roughly U-shaped cross-section and for the qo |3^bo housings to be removably disposed one after the other so as to form a channel through which the belt of workpieces moves and for the channel to be closed on both sides by end plates having open passages for the workpieces. In this case the housing and the end plates are very advantageously made of concrete. In an emobdiment of the invention of this type it is possible to adapt the device to the particular requirements by removal or insertion of additional housing sections.

The figure shows a partly schematic view of an exemplary embodiment of a device in accordance with the invention. The tools 1, 2, 3 and 4 are secured to the inner top surface of the housings 9, 10, 11 and 12 by integrally cast securing plates 5, 6, 7 and 8. As the housings 9 to 12 are made of concrete, the tools are suspended in a manner resistant to vibration and thus produce very high cutting accuracy. The workpieces 14 are passed at an even rate on a belt 13 from one processing station to the next. Each tool’s share in the process is exactly programmed. The position of the tool on the inner top surface of the housing is fixed, depending on this share, and the disposal of the tools within the housings and the form of movement of the tools can be fixed depending on the type of workpiece to be processed. For reasons of clarity, the end plates with the open passages have not been shown.

Claims

1. Device for the simultaneous processing of workpieces passed at an even rate in one direction, using a plurality of liquid jet cutting tools, characterised in that the tools are fixedly disposed one after the other in the direction of motion of the belt of moving workpieces, and that each tool always processes the same part of each workpiece, in the manner of conveyor belt processing.

2. Device according to Claim 1, characterised in that the tools arranged one after the other are perpendicularly offset with respect to the belt of moving workpieces.

3. Device according to Claim 1 or 2, characterised in that the spatial arrangement of the tools can be altered.

4. Device according to any preceding claim, characterised in that the tools can be caused to rotate and/or to move in the vertical direction at their respective locations.

5. Device according to any preceding claim, characterised in that each tool is individually hung from the top surface of a housing of roughly U-shaped cross-section and that the housings are removably disposed one after the other so as to form a channel through which the belt of workpieces moves and that the channel is closed on both sides by end plates having open passages for the workpieces.

6. Device according to Claim 5 characterised in that the housings and the end plates are made of concrete.

7. Device for the simultaneous processing of workpieces, substantially as herein described with reference to or as illustrated in the accompanying drawings . Dated this the 7th day of September, 1990 F. R. KELLY & CO EXECUTIVE HELMUT PELZER One Sheet Only 9o|