EP2353823B1 - Positioning device for adjustable elements, method for positioning adjustable elements and use of positioning device - Google Patents

Description

The invention relates to a positioning device for adjustable cutting wires, a method for positioning of adjustable cutting wires and a use of a positioning device.

Clay strands for the production of masonry and paving bricks are conventionally isolated and / or processed in a cutting and / or processing device to clay elements. Thus, the clay strands are cut, for example, by means of a cutting wire frame, also known as a cutting harer, to a corresponding extent, wherein the cutting wire frame includes a plurality of cutting wires, which are arranged extensively and extending substantially parallel to each other. For cutting a continuous loam strand is guided by means of a conveyor on a support frame below the cutting wire frame. Subsequently, the continuous clay strand and the cutting wire frame are approximated in relation to each other, wherein the individual cutting wires penetrate into the material of the clay strand and this, following the further movement, cut into individual clay elements. Further, the cutting wires continue to follow this movement, a piece far deeper through individual passages of the support frame. Due to the plastic deformability of the clay strand, the individual cutting wires run exactly guided by the clay strand and the passages through and thus break the loam strand into individual clay elements desired degree. After cutting, the individual cutting wires are thus no longer engaged with the clay strand material. Thereafter, the clay elements are conveyed by a further conveyor. Thereafter, the cutting wire frame is moved back to the initial position, after which then the next continuous strand of clay strand is positioned below the cutting wire frame. The disassembled clay elements can be transferred to further processing steps.

DE-A1-199 34 391 discloses a positioning device for adjustable cutting wires of a cutting frame, and a method for positioning these cutting wires according to the preamble of claims 1 and 14 or

Usually, the clay strand material is pressed through an exchangeable mouthpiece of a pre-processing device and thereby extruded such that the width and height of the clay strand already correspond to the desired dimensions in terms of width and height of the clay elements. Therefore, the clay strand must then be disassembled or separated only in its length corresponding to the desired length of the clay elements to be formed. Thus, the individual cutting wires are spaced relative to each other on the cutting wire frame such that the distance between them equals the desired length of the respective clay elements.

It is known that the cutting wires are removably attached to the cutting wire frame. As a result, individual cutting wires can be removed if they have to be torn by material fatigue and replaced. It is also known that the cutting wires vertically adjustable to the longitudinal direction of the cutting wire frame this are arranged. By adjusting the cutting wires in relation to each other, the cutting wire frame can be easily used to disassemble the clay strand into individual clay elements of a changed length.

The disadvantage here, however, that the cutting wires must be positioned exactly aligned with each adjustment to disassemble the loam strand provided in clay elements extent (length). Even a minimal deviation of the positioning of the cutting wires from predetermined guide values could lead to clay elements of a whole production having a faulty dimension and having to be disposed of costly. This exact positioning of the individual cutting wires in relation to each other is very time consuming and error prone. For this purpose, trained personnel is currently used, which positions the cutting wires, for example with the aid of special distance gauges and then verified.

It is an object of the present invention to provide a positioning device for adjustable cutting wires, a method for positioning of adjustable cutting wires and a use of a positioning device, wherein the adjustable cutting wires can be positioned very accurately and within a short time as desired.

This object is achieved by a positioning device having the features of patent claim 1.

By means of this positioning device, the cutting wires of the cutting wire frame can be adjusted particularly quickly with the highest precision in relation to each other. For this purpose, the cutting wire frame is removed from the cutting and / or processing device and inserted into the positioning device. Subsequently, the respective desired positions, for example distances between the cutting wires, can be supplied via an input device to a controller. In most applications, these distances between the cutting wires are identical to each other. The controller then controls the optical adjustment such that it projects to a respective desired position an optical display in the direction of the cutting wire frame. Subsequently, a respective cutting wire is manually adjusted, for example in the longitudinal direction of the cutting wire frame, until the optical display is detected on this cutting wire. In this case, the optical adjustment device should project at least two optical displays. Thus, the cutting wire can be positioned as desired over its entire length as soon as these two optical displays can be detected on it. In addition, an exact parallelism between the individual cutting wires can thus be ensured. This detection happens here For example, optically or visually by a surgeon who adjusted the cutting wire until the visual display is visually recognized on the cutting wire.

Preferably, the optical adjustment means is adapted to project a line-shaped pattern. In this way, the optical adjustment device can pretend on a possible total length of a respective cutting wire by projection of the linear pattern, to which desired position of the cutting wire is to be moved.

Preferably, the optical adjustment device is movable on a plane plane-parallel to the plane of the adjustable cutting wires to the respective desired position. For this purpose, the optical adjusting device can be moved at a substantially parallel to the plane of the cutting wires arranged boom.

Preferably, the optical adjustment device includes an optical deflection device, which is designed to deflect the optical display to the respectively desired position. This additional expenditure is advantageously offset by the savings in the movability of the optical adjustment device. The optical adjustment device is in this case, for example, fixed substantially centrally above the arranged cutting wire frame and radiates the optical display (for example a laser beam) onto the deflection device. The optical deflection device can, for example, contain a mirror or an optical prism, which is / or which is controllably adjusted via an actuator. Here, the beam of the optical display is at height each to be adjusted cutting wire to illuminate those position to which the cutting wire is to be adjusted or positioned. As mentioned above, at least two optical displays should be provided to allow the most accurate positioning possible. After this positioning has taken place, the optical deflector is adjusted by the actuator such that the optical display at the level of a next cutting wire illuminates the desired position on which this cutting wire is to be positioned. Due to the now obliquely projecting direction of the optical display and the possibility that the cutting wires may have different heights, these parameters must be used in addition to the adjustment of the optical deflector to avoid alignment errors. The respective adjustment of the optical deflection device may in this case require complex triangulation calculations which are carried out, for example, by means of an electrically connected calculation unit.

Preferably, the optical adjustment device includes a laser. The coherent light of the laser provides a particularly precise and also particularly well detectable or detectable positioning. Thus, the respective cutting wire can be positioned very quickly and precisely. However, as known to those skilled in the art, the optical adjuster may also include any other optical devices for emitting a beam of any wavelength.

A plurality of cutting wires are stretched in the surface of the cutting wire frame and their orientation is adjustable on the cutting wire frame. Here, the optical adjustment of the positioning device, for example, be moved vertically to the alignment of the cutting wires to the respective desired positions. For this purpose, the optical adjusting device is moved at a substantially parallel to the plane spanned the cutting wires and additionally perpendicular to the cutting wires extending boom. In this example, the boom may be located above the inserted cutting wire frame. In this case, the optical adjustment then projects the optical display directly vertically downwards directed to the cutting wire frame. Thus, the respective cutting wire can be manually positioned so until the visual display (preferably at least two points of light) is recognizable thereon. Subsequently, the respective cutting wire is fixed in this position, so that it can not be adjusted. After these steps, for example by means of a manual input via an input device, a movement of the optical adjustment device to a next desired and previously defined position can be requested. Arrived at this desired position, the next cutting wire can be positioned exactly as desired. These steps can be done until all cutting wires of the cutting wire frame are positioned as desired.

Preferably, the positioning device includes a pivoting device for pivoting the inserted cutting wire frame. As a result, the frame after insertion into the positioning device, for example, be turned by 180 °, so as to obtain a better access to components for adjusting the cutting wires of the cutting wire frame.

Preferably, the optical adjustment device comprises a camera and a display device, on which an image of the respective cutting wire of the inserted cutting wire frame detected by the camera can be displayed, and on which the optical display can be projected onto the at least one desired position of the element frame shown on the display device. The optical detection can thus be done via the camera, for example a video camera, and the display device, for example a monitor. The image of the respective cutting wire to be adjusted is visible to the surgeon, shown on the display device. The optical display, which is also displayed on the display device, on the at least one desired position makes the desired position of the respective cutting wire to be set visible. Thus, the adjustment of this particular cutting wire to be adjusted quickly, easily and accurately monitored by the display device. The surgeon still manually adjusts the respective cutting wire to be adjusted manually.

Preferably, the visual display is displayed as a line-shaped pattern on the display device. Thus, the target position of each cutting wire to be set is displayed as a simple and accurately detectable pattern on the display device. The surgeon now shifts the respective cutting wire to be adjusted until its position coincides with the setpoint position that can be recognized on the display device.

Preferably, the optical adjustment means further includes a laser which projects the line-shaped pattern to the desired position. In the case of the movable optical adjustment device described above, the camera and the laser are moved together. Thus, the line-shaped pattern is projected and can be detected on the display device as a mask (target position).

Preferably, the line-shaped pattern is statically displayed on the display device. Thus, the visual display is permanently displayed to the desired position on the display device. For example, the optical display can be displayed scalably on the display device via an image processing system.

Preferably, the image captured by the camera of the respective cutting wire of the inserted cutting wire frame on the display device can be enlarged. The optical display to the desired position of the respective cutting wire to be set and this itself can thus be more accurately recognized on the display device. For this purpose, only the image recorded by the camera is additionally enlarged or zoomed in. As a result, an even more accurate positioning is possible. The optical display on the display device can be scalable via an image processing system as a function of the magnification.

The above object can also be achieved by a method for positioning adjustable cutting wires of a cutting wire frame of a cutting and / or processing device for clay strands according to claim 14. By this method, all the cutting wires of the cutting wire frame can be quickly and accurately be positioned. Due to the simplicity of the implementation of this method, this work can also be performed by an operator, which does not need to be trained intensively for positioning the cutting wires.

Preferably, the optical adjustment device projects a line-shaped pattern. As optical adjusting laser devices are applicable. There are a variety of laser devices with a laser and a downstream optics on the market, which optics is designed to reshape the incident laser beam such that a fan-shaped area is illuminated. If such a laser device is directed onto a projection surface, a line-shaped pattern or a straight line appears on it. Multiple series of tests have shown that this line-shaped pattern appears particularly well on a respective cutting wire to be aligned (as soon as it is positioned to a position in accordance with the desired position) or lights up on it. A particular advantage is also that any angular misalignment of a cutting wire is almost eliminated.

Preferably, the optical adjustment is moved on a plane plane parallel to the plane of the adjustable cutting wires to the respective desired position. In this way, the optical adjustment can be moved vertically to the alignment of the cutting wires to the respective desired positions. Here, the optical adjusting device on a plane-parallel to the plane spanned the cutting wires and arranged perpendicular to the cutting wires arranged boom to be movable. The control of the optical adjustment can be done for example by means of a stepper motor, which is controlled by an electrical control.

Preferably, the optical display is deflected via an optical deflector to the respectively desired position. By means of this method, the optical deflecting device only needs to be fixed to a suspension which is arranged essentially centrally relative to the cutting wire frame. The deflection of the optical display can in this case be effected, for example, by means of an adjustable mirror or a prism via an actuator. However, other deflection devices known in the field of optics are conceivable for use.

Preferably, the optical adjustment device emits a laser beam. A laser required for this purpose should emit the lowest possible light output in order to almost exclude possible eye injuries of the operating personnel. Such low-power lasers still emit a sufficiently strong laser beam whose projection is easily detectable even in very bright daylight conditions. Due to the particular coherence of the laser beam, the (desired) illuminated position is determined unequivocally and without variance.

The above object can also be achieved by using a positioning device according to one of Claims 1 to 13 for positioning adjustable cutting wires of a cutting wire frame according to claim 19 solve.

Figur 1

eine untere Teilansicht auf zwei Elementrahmen, nämlich einen Schneiddrahtrahmen und einen Auflagerahmen;

Figur 2

eine Vorderansicht der Positioniervorrichtung gemäss der vorliegenden Erfindung;

Figur 3

eine Seitenansicht der in Figur 2 angezeigten Positioniervorrichtung; und

Figur 4

eine Draufsicht der in Figuren 2 und 3 angezeigten Positioniervorrichtung.

Further details of the invention and in particular exemplary embodiments of the inventive positioning device are explained below with reference to the accompanying drawings. Show it:

FIG. 1

a bottom partial view of two element frames, namely a cutting wire frame and a support frame;

FIG. 2

a front view of the positioning device according to the present invention;

FIG. 3

a side view of in FIG. 2 displayed positioning device; and

FIG. 4

a top view of the Figures 2 and 3 displayed positioning device.

FIG. 1 shows a partial view of two element frames a cutting and processing device (not shown). Here, an element frame is designed as a cutting wire frame 12. The cutting wire frame 12 is used to cut a clay strand (not shown) into individual clay elements, which are formed in further process steps to ceramic products, such as masonry or pavers.

The cutting wire frame 12 includes a frame 14 on which a plurality of cutting wires 16 is tensioned. In this case, each cutting wire 16 is clamped at its ends into a fixing element 18 ', 18 " oppositely arranged fixing elements 18 ', 18 "are each arranged on a fixed to the frame 14 rail 20', 20". Here, the fixing elements 18 ', 18 "vertically to the longitudinal direction of the cutting wire 16 slidably on the rail 20', 20" are arranged. Thus, the distances of the cutting wires 16 can be changed in relation to each other. The change in the distances may be necessary, for example, if a clay strand is to be used to produce several clay elements which have a different length compared to a previous production series (depending on the respectively requested production).

After a respective positioning of the cutting wire 16, the latter is fixed in the desired position by tightening locking screws (not shown) on the fixing elements 18 ', 18 ", The fixing screws 18', 18" can be tightened on the rail 20 'by means of the locking screws. , 20 "clamped or otherwise fixed.

As another elementary frame shows Fig. 1 a support frame 22, which is disposed in the cutting and processing device below the cutting wire frame 12. On the support frame 22 rests the clay strand. The support frame 22 is subdivided into a plurality of subdivided support sections 24. The support sections 24 are substantially subdivided at those locations (passages) at which, with the desired orientation of the cutting wire frame 12 and the support frame 22 relative to one another, the respective cutting wires 16 extend therethrough.

Further element frames may further include chamfering tools (not shown) for chamfering the individual clay elements. An exemplary Faswerkzeug comprises a plurality of Fasscheiben, which are arranged mutually adjustable spaced apart in the longitudinal direction of a Faswalze. There may be provided several chamfering rollers for chamfering a plurality of edges of the clay elements. The Faswalzen are aligned perpendicular to the direction of extension of the cutting wires 16.

To cut the clay strand, the cutting wire frame 12 and the support frame 22 are moved in relation to each other. In this case, the support frame 22 is often moved in the direction of the (fixed) cutting wire frame 12. In this movement, the respective cutting wires 16 enter the plastically deformable material of the clay strand and thereby cut this into individual clay elements. By dividing the support frame 22 into individually divided support sections 24, the cutting wires 16 can completely penetrate the material of the clay strand - and further beyond that - beyond. Thus, the cuts are straight and uninterrupted drawn through the material of the clay strand. After the individual clay elements are cut, they are removed and then the above-mentioned movement between the cutting wire frame 12 and the support frame 22 is inversely performed in relation to each other.

The market is increasingly asking for individually designed and dimensioned ceramic products, such as Wall and plaster tiles. Therefore, it may happen that the cutting wires 16 must be adjusted several times in relation to each other even within a production day to meet a changed dimension, such as length, of required ceramic products. Each positioning requires a lot of experience, time and precision. Due to the previously reported frequency of positioning, this is now associated with high costs.

FIG. 2 shows a front view of a positioning device 30 according to the present invention. The positioning device 30 includes a base frame 32, which supports a respective holding surface 34 and a boom 36 horizontally. The holding surface 34 serves to receive an element frame. In the example shown in the figure, the element frame formed as a cutting wire frame 12 is accommodated. Alternatively, the in FIG. 1 described support frame be included as an element frame.

The likewise horizontally oriented arm 36 includes an optical adjustment device 38, which projects at desired positions an optical display, which is optically detectable at a desired positioning position of a respective cutting wire. This optical adjustment device 38 may, for example, contain a laser, which particularly advantageously projects a line pattern in the direction of the cutting wire frame 12. Thus, each cutting wire with dissolved fixing be adjusted vertically to the orientation of its longitudinal axis until the line-shaped pattern is projected at this, or lights up. In the case of the support frame accommodated in the positioning device 30, the support sections of the support frame can be positioned in an analogous manner.

Due to the high coherence of the laser beam, this positioning is free of variances. After positioning this cutting wire can be firmly fixed on its fixing. Subsequently, the optical adjustment device 38 moves along the arm 36 in the direction of the next cutting wire. The exact positioning of this cutting wire is analogous to the previously described manner. The positioning device 30 further includes a controller 40 which includes an input device 42 for inputting respective desired positions or distances between the individual cutting wires.

FIG. 3 shows a side view of the inventive positioning device 30. In this view, the controller 40 is particularly well visible, which electrically controls the driving of a stepping motor (not shown) for linearly moving the optical adjustment device 38.

FIG. 4 shows a plan view of the positioning device 30 according to the present invention with an inserted cutting wire frame 12. In this view, the fixing elements 18 ', 18 "of the cutting wire frame 12 can be seen well, which on rails 20', 20" are arranged adjustable. To adjust the fixing elements 18 ', 18 "respectively provided locking screws (not shown) are released so that the fixing elements 18', 18" and thus also the cutting wire (not shown) can be adjusted and positioned vertically for alignment. After successful positioning, the fixing elements 18 ', 18 "are firmly engaged by means of their locking screws with the respective rail 20', 20".

Claims (19)

1. Positioning device (30) for adjustable cutting wires (16) of a cutting harp (12) of a cutting and/or processing device, which is designed to cut and/or process clay columns, wherein the positioning fixture (30) comprises:

   the cutting harp (12), characterized in that the positioning device additionally comprises:

   a holder, into which the cutting harp (12) can be inserted, and

   an optical adjustment system (38) for projecting a visual display onto at least one desired position of the inserted cutting harp (12), and with matching positioning of a respective cutting wire of the cutting harp (12), the display can be detected at this cutting wire.
2. Positioning device (30) according to Claim 1, in which the optical adjustment system (38) is designed to project a line-shaped pattern.
3. Positioning device (30) according to Claim 1 or 2, in which the optical adjustment system (38) can be moved to the respective desired position on a plane that is plane parallel to the plane of the adjustable cutting wires (16).
4. Positioning device (30) according to Claim 1 or 2, in which the optical adjustment system (38) comprises an optical deflection system, which is designed to deflect the optical display to the desired position.
5. Positioning device (30) according to any one of the preceding claims, in which the optical adjustment system (38) comprises a laser.
6. Positioning device (30) according to any one of the preceding claims, wherein the cutting wires (16) extend under tension in the area of the cutting harp (12) and their orientation to the cutting harp (12) is adjustable.
7. Positioning device (30) according to any one of the preceding claims, wherein the cutting harp (12) comprises a support frame (22) for receiving the clay column and the cutting wires (16) comprise a plurality of support sections (24), between which openings can be defined for the through passage of cutting wires (16).
8. Positioning device (30) according to any one of the preceding claims, with a pivoting device for pivoting the inserted cutting harp (12).
9. Positioning device (30) according to Claim 1, in which the optical adjustment system (38) comprises a camera and a display device, on which an image of the respective cutting wire (16) of the inserted cutting harp (12) captured by the camera can be displayed, and on which the visual display can be projected onto the at least one desired position of the cutting harp (12) that is displayed on the display screen.
10. Positioning device (30) according to Claim 9, in which the visual display is displayed on the display device as a line-shaped pattern.
11. Positioning device (30) according to Claim 10, in which the optical adjustment system (38) additionally comprises a laser which projects the line-shaped pattern onto the desired position.
12. Positioning device (30) according to Claim 10, in which the line-shaped pattern is displayed statically on the display device.
13. Positioning device (30) according to any one of Claims 9 to 12, in which the image of the respective cutting wire (16) of the inserted cutting harp (12) captured by the camera can be enlarged on the display device.
14. Method for positioning adjustable cutting wires (16) of a cutting harp (12) of a cutting and/or processing device for clay columns, characterized in that the cutting harp (12) can be inserted into and removed from a positioning fixture (30), with the steps:

    inserting the cutting harp (12) into a holder of the positioning device (30);

    controlling an optical adjustment system (38) of the positioning device (30) to project a visual display onto at least one desired position of the inserted cutting harp (12);

    adjusting a respective cutting wire of the inserted cutting harp (12) in such a manner until the visual display is detected on this cutting wire when the positioning matches;

    fixing the respective cutting wire enclosed in this desired position on the cutting harp (12); and

    removal of the cutting harp (12) from the holder of the positioning device (30).
15. Method according to Claim 14, in which the optical adjustment system (38) projects a line-shaped pattern.
16. Method according to Claim 14 or 15, in which the optical adjustment system (38) is moved to the respective desired position on a plane that is plane parallel to the plane of the adjustable cutting wires (16).
17. Method according to Claim 14 or 15, in which the visual display is deflected to the desired position via an optical deflection system.
18. Method according to any one of Claims 14 to 17, in which the optical adjustment system (38) emits a laser beam.
19. Use of a positioning device (30) according to any one of Claims 1 to 13 for the positioning of adjustable cutting wires (16) of a cutting harp (12).

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