WO2023242443A1 - Procédé et dispositif de surveillance de l'état d'un câble et pince de serrage - Google Patents

Procédé et dispositif de surveillance de l'état d'un câble et pince de serrage Download PDF

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Publication number
WO2023242443A1
WO2023242443A1 PCT/EP2023/066492 EP2023066492W WO2023242443A1 WO 2023242443 A1 WO2023242443 A1 WO 2023242443A1 EP 2023066492 W EP2023066492 W EP 2023066492W WO 2023242443 A1 WO2023242443 A1 WO 2023242443A1
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WO
WIPO (PCT)
Prior art keywords
rope
section
area
end cross
press clamp
Prior art date
Application number
PCT/EP2023/066492
Other languages
German (de)
English (en)
Inventor
Peter Raach
Jürgen Schmidt
Hermann Scheithauer
Dietmar SCHUHMACHER
Original Assignee
Gebrüder Wanner GmbH
Hahn-Schiickard-Gesellschaft Für Angewandte Forschung E.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gebrüder Wanner GmbH, Hahn-Schiickard-Gesellschaft Für Angewandte Forschung E.V. filed Critical Gebrüder Wanner GmbH
Publication of WO2023242443A1 publication Critical patent/WO2023242443A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/02—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with parts deformable to grip the cable or cables; Fastening means which engage a sleeve or the like fixed on the cable
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/952—Inspecting the exterior surface of cylindrical bodies or wires

Definitions

  • the present invention relates to a method and a device for monitoring the condition of a rope, in particular a wire rope, furthermore to a press clamp for a rope, which enables condition monitoring, and a manufacturing method for such a press clamp.
  • Rope connections are used in a variety of applications, for example in mechanical engineering, in the construction industry or in architecture, for example in bridge construction, in particular for transmitting forces essentially in the direction of the rope.
  • Steel wire ropes are often used to transmit large forces, for example in mechanical engineering or bridge construction.
  • a method for monitoring the condition of a rope, in particular a wire rope comprising providing a reference surface condition of an end-side cross section of a rope, in particular a wire rope, determining a current surface condition of the end-side cross section, and determining a condition and/or or a change in the condition of the rope by comparing the reference surface condition and the currently determined surface condition, whereby a change in a partial area of the surface condition is indicative of a change in the condition of the rope.
  • the change in state of the surface condition or the change in the partial area of the surface condition is particularly permanent and irreversible in the rope. Accordingly, the change in the partial area compared to the reference surface quality can still be detected even after the load that led to the change in the surface quality in the partial area has been removed, since it is permanently and irreversibly present in the rope.
  • the proposed method enables simplified preservation of evidence, in particular regardless of the place of use of the rope, a sensor system installed at the place of use and/or measured values and data determined by the sensor system.
  • a report carried out based on the proposed method is therefore exempt from the aforementioned disadvantages with regard to the problem of subsequent proof and/or possible manipulation.
  • the proposed method can subsequently and repeatably detect a change in state that has occurred in the rope due to the permanent and irreversible change in the partial area that is permanently present on the rope be determined. This determination cannot be manipulated, for example by influencing stored measured values or data. This means that evidence of an overload that has occurred can be determined in a non-manipulable and repeatable manner.
  • a permanent, irreversible change in the condition of the rope can be determined by comparing the reference surface condition and the currently determined surface condition, with a permanent, irreversible change in a partial area of the surface condition being indicative of the permanent, irreversible change in condition of the rope.
  • providing the reference surface condition can include processing the end side of the rope.
  • This preferably includes abrasive processing, particularly preferably a cutting and/or grinding processing and/or eroding, of the end side of the rope.
  • an application process preferably deposition welding, can be provided on the end side of the rope.
  • the processing alternatively or additionally involves a cleaning process, preferably blowing out, wiping, rinsing, degreasing and/or drying the end side of the rope.
  • providing the reference surface condition can include initially determining the reference surface condition.
  • the change in state can preferably be indicative of a predetermined overload case of the rope and/or a press jamming of the rope, wherein the change in state is preferably indicative of a predetermined force applied to the rope being exceeded, preferably a predetermined force in the rope direction.
  • the change in the partial area of the surface quality preferably a relative movement, particularly preferably an axial displacement, of at least one wire and/or at least one strand and/or at least one insert or core of the rope in the rope direction, in a predetermined monitoring area of the cross section determined.
  • a predetermined monitoring area an area can preferably be selected in which a displacement of an element of this partial area is to be expected first, i.e.
  • the end cross section is essentially planar.
  • the end cross section can alternatively or additionally comprise at least a first surface section and a second surface section, wherein the second surface section is preferably offset from the first surface section, so that the first and second surface sections are arranged spaced apart from one another by a predetermined amount in the cable direction.
  • the second surface section can be oriented at an angle to the first surface section.
  • angle here is understood to mean an angle enclosed by the planes defined as surface sections, in particular when viewed from a direction perpendicular to the (longitudinal) cable direction.
  • the cross section can also alternatively or additionally have at least partially a curved surface, preferably with a constant curvature, the cross section preferably being a partial area of a bore side wall of a bore, preferably a cylindrical bore, introduced in a press clamp pressed onto the cable transversely to the axial cable direction.
  • the bore diameter is larger than the outer diameter of the rope and/or the bore axis and the rope center axis intersect or are at a distance to each other, which is smaller than the difference between the bore diameter and the cable outer diameter in the area of the bore. This ensures that the cross section extends across the entire rope transversely to the direction of the rope.
  • the diameter of the hole or a comparable recess can be smaller than the rope diameter.
  • the bore or recess then preferably only partially cuts through the rope, with the separated area or a part of this area being able to be selected as the monitoring area. This means that safety-critical parts of the rope can remain completely in the press clamp and continue to transmit forces particularly safely.
  • the end cross section is arranged in the axial direction at the level of a press clamp pressed with the rope, preferably a round clamp, with the end cross section preferably being present at a free end of the press clamp or in the press clamp.
  • this can provide a stable termination of the rope.
  • this makes it possible to monitor both the rope itself and in particular the ferrule connection between the ferrule sleeve and the rope and between the elements of the rope with each other.
  • the rope can have at least a predetermined area of high compression of elements of the rope, preferably of wires and / or strands of the rope, and at least one predetermined area of low compression of elements of the rope, preferably of wires and / or strands of the rope, include.
  • the compression of the elements, preferably the wires and/or strands, relative to one another is lower than in the high compression area. It has proven to be advantageous if the area of low compression comprises a core strand of the rope and/or the area of high compression comprises at least one outer strand of the rope, preferably all of the outer strands of the rope.
  • the predetermined monitoring area preferably corresponds at least partially to the area of low compression.
  • the surface condition is preferably determined by determining a sensor data set, the sensor data set being indicative of the surface condition of the cross section.
  • the surface condition is preferably determined mechanically and/or optically and/or inductively and/or magnetically, with the surface condition preferably being carried out by a distance measurement, preferably a mechanical, optical and/or magnetic and/or inductive distance measurement, and/or the surface condition by evaluation at least one recorded image of the cross section is determined.
  • the recording of speckle patterns is advantageously suitable for monitoring a rope, in particular a wire rope, in that expansion of the wires or strands due to a load in the direction of the rope can be distinguished from effects due to thermal expansion.
  • the thermal expansion which acts equally on all components of the rope, for example on all wires and/or strands of a wire rope, and thus represents a common mode change, and can be compensated for by comparing speckle patterns for condition monitoring.
  • the recording of speckle patterns to determine the surface quality of the rope, in particular wire rope provides sufficient two-dimensional resolution to record the changes in length of the individual wires or strands. Furthermore, the recording of speckle patterns provides such a high resolution that displacements and/or changes in length in an axial third dimension orthogonal to the cross-sectional area can be determined with high precision.
  • speckle photography is used in particular to detect changes or structures in a plane.
  • the method for monitoring the condition of the rope, in particular the wire rope, according to the embodiment of recording speckle patterns allows immediate detection without a time delay if a change in the condition of the surface quality has occurred. If the surface quality of the end cross section of the rope, in particular of the wire rope, changes, e.g. B. by moving a wire in the direction of the rope, there is a simultaneous change in the recorded speckle pattern. Appropriate measures can therefore advantageously be taken promptly in order to avoid dangers when using the rope, in particular the wire rope, in relation to a possible crack and/or other type of inability to function.
  • the embodiment allows the recording or evaluation of the recording of speckle patterns non-invasively over a long period of time. This advantageously enables constant monitoring, which increases the reliability of the method.
  • condition monitoring using speckle patterns is that it can be carried out particularly cost-effectively.
  • the preferred components such as a light source for emitting coherent light beams and a recording device, such as. B. a CCD sensor, can be purchased inexpensively and is just as easy and quick to attach and position for monitoring the condition of the rope.
  • the preferred method is therefore suitable for monitoring the condition of ropes, in particular wire ropes, in a particularly economical manner.
  • speckle preferably refers to an interference phenomenon that results from an inherently rough surface of the end cross-section of the rope, in particular a wire rope.
  • Light rays emitted onto the end cross section are initially reflected in different spatial directions starting from stochastically distributed scattering centers (roughness). At every point in space, light from several scattering centers interferes, resulting in a stochastically distributed intensity pattern.
  • the resulting interference of coherent light radiation causes constructive and destructive interference. In this case one also speaks of objective speckles.
  • speckle patterns is intended to preferably mean subjective speckles that can be detected on the recording device.
  • the recording device preferably captures images of the speckle patterns that occur over several points in time. Based on an evaluation of the speckle patterns, a state and/or a change in state of the rope, in particular of the wire rope, can be determined.
  • the change in state of the rope is determined by an axial displacement of a wire and / or a strand in the direction of the rope by a change in the speckle pattern in the recorded image, the change in the speckle pattern preferably being based on a shadow cast due to the axial Displacement of the wire and/or the strand in the direction of the rope can be determined.
  • the term “casting a shadow” preferably means the appearance of a shadow when a wire and/or a strand is moved in the direction of the cable.
  • the captured images of the speckle pattern are particularly sensitive to shadows that occur, so that axial displacement of a wire and/or strand can be detected at an early stage.
  • the inventors have recognized that ropes, especially wire ropes, can be monitored extremely reliably and efficiently by recording images of speckle patterns.
  • Speckle photography is usually used in the prior art to measure displacements perpendicular to the direction of observation, ie so-called in-plane displacements, i.e. displacements along a plane.
  • in-plane displacements i.e. displacements along a plane.
  • out-of-plane shift i.e. a shift outside the plane
  • the out-of-plane displacement preferably meaning an axial movement of a wire and / or a strand in the rope direction.
  • the axial displacement of a section of the rope, preferably the wire rope, preferably a wire and/or a strand, in the direction of the rope can be measured from 100 pm, preferably from 50 pm, particularly preferably from 10 pm, very particularly preferably from 1 pm .
  • images of speckle patterns are evaluated, which were recorded at different times and are preferably compared with one another, with a comparison particularly preferably being carried out by a numerical difference in the recorded images of speckle patterns.
  • a comparison by forming a numerical difference can, for example, concern the difference between the intensities of the speckle patterns of the reference surface condition and the current surface condition.
  • a computing unit is configured to carry out corresponding computing operations in order to do this To compare the speckle pattern of the current surface texture and that of the reference surface texture and, for example, to form a difference between these two speckle patterns.
  • the computing unit can be present, for example, as a component for carrying out the method, e.g. B. in a housing with the press clamp or outside the press clamp.
  • the method is not limited to specific calculation methods for comparing the speckle patterns. Instead, in addition to simple difference formation, other metrics can also be used, for example, to determine a state and/or a change in state.
  • the light sources mentioned have proven to be reliable for emitting coherent light beams onto the end cross section of the rope, in particular wire rope, for speckle recording.
  • Lasers can advantageously emit light beams that have a comparatively long coherence length.
  • LEDs have a short coherence length compared to lasers, although this is sufficient in relation to the typical dimensions of the device and LEDs are also easy to provide.
  • the light sources mentioned can advantageously be easily installed in a suitable construction.
  • the coherent light beam strikes an end cross section of the wire rope at an angle of incidence of 10° to 80°, preferably 20° to 70°, particularly preferably 30° to 60°. All intermediate values can also be preferred from the aforementioned range, for example approximately 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75° or approx. 80°. Terms such as essentially, approximately, approximately, approximately etc. preferably describe a tolerance range of less than +20%, preferably less than ⁇ 10%, particularly preferably less than ⁇ 5%, in particular less than +1% and always include the exact one Value.
  • the angle of incidence preferably characterizes the angle that the preferably coherent light beams have to the normal of the end cross section of the rope, in particular wire rope.
  • An angle of incidence of 0° therefore preferably means a beam striking the end cross section perpendicularly with the perpendicular of incidence.
  • an angle of incidence that deviates from this is preferred.
  • the aforementioned angles of incidence lead to a particularly high one Sensitivity of the recorded speckle patterns with regard to a shadow cast when a wire or strand is axially displaced, so that particularly precise monitoring of a state and/or a change in state is possible.
  • one or more optical components for beam shaping preferably a lens, particularly preferably a converging lens, are located between the light source and the end cross section of the wire rope.
  • Optical components can advantageously be used to better focus the light rays that are emitted onto the end cross section of the rope. This can advantageously increase the intensity of the recorded speckle pattern and thus also improve the resolution.
  • a lens particularly preferably a converging lens, is used, which has proven itself to enable a special focusing of the light beams on the end cross section of the wire rope.
  • the recording device is selected from a group comprising a digital camera and/or a CCD sensor, wherein the recording device preferably records at least 2, 3, 5, 10 or more images of speckle patterns per second.
  • the capture device preferably identifies any device capable of capturing images of speckle patterns.
  • a digital camera and/or a CCD sensor can be used inexpensively to capture a plurality of images of speckle patterns in a period of time, for example at least 2, 3, 5, 10 or more images of speckle patterns per second. Capturing multiple images of speckle patterns increases reliability and ensures continuous monitoring.
  • an aperture can be present between the recording device and the end cross section, so that a brightness and/or an image section of the captured images of a speckle pattern can be regulated, the aperture preferably having an aperture number between 1 and 20, preferably between 10 and 18, having.
  • Apertures preferably refer to openings which limit the expansion of the bundles of light rays. Apertures are often characterized by the f-number.
  • the f-number preferably refers to the ratio of the focal length and the diameter of the aperture or the opening, so that the light intensity is inversely proportional to the square of the f-number due to the cross-sectional area of the opening.
  • the aperture number By selecting the aperture number, the depth of field of the speckle pattern can be regulated. The larger the aperture number (or the smaller the aperture opening), the greater the depth of field. The smaller the aperture number, the smaller the depth of field, because the greater it is aperture.
  • the preferred aperture numbers have proven to be particularly advantageous for optimal depth of field while at the same time providing sufficient intensity (brightness).
  • the surface quality can also be detected volumetrically, for example by introducing an incompressible fluid into a bore of a press clamp, which at least intersects the monitoring area of the rope, whereby the amount of fluid introduced is detected.
  • a change in the surface quality is expressed in a change in the fluid in the bore, so that a change in state can be inferred from the change in the determined fluid volume.
  • a device for monitoring the condition of a rope, in particular a wire rope comprising a sensor device which is set up to determine a surface quality of an end cross-section of a rope, in particular a wire rope, and an evaluation unit, preferably a computing unit, which is set up for Determining a state and/or a change in state of the rope by comparing a reference surface quality of the end cross-section and a currently determined surface quality of the end cross-section, wherein the evaluation unit is set up to detect a change in state of the rope based on a change in a partial area of the surface quality.
  • the device can be set up to carry out the method described above.
  • the device makes it possible to achieve the advantages and effects mentioned above in a manner analogous to the method described above.
  • One skilled in the art will recognize that technical features, definitions and advantages of preferred embodiments disclosed for the method according to the invention apply equally to the device, and vice versa. Accordingly, the disclosure is not repeated here in order to avoid redundancies.
  • At least one sensor unit of the sensor device can be at least partially insertable into a recess, preferably a bore, introduced transversely to the axial rope direction in a press clamp pressed onto the rope, wherein the sensor device is preferably set up in the hole inserted Condition of the sensor unit or the sensor device to determine the surface condition.
  • the Sensor unit or the sensor device has external dimensions transverse to an insertion direction into the bore, which is smaller than or equal to the dimensions of the recess or bore transverse to the insertion direction.
  • the insertion direction corresponds to a longitudinal extent of the recess or bore. This makes it easy to determine the surface condition.
  • the cross section is present in the press clamp, it can also be assumed that, due to the pressed position in the press clamp, it will be stable over a long period of time even when in use, i.e. without changes, such as fraying or unthreading of the elements of the rope on its end side experienced, exists.
  • the sensor device can comprise a volumetric measuring sensor unit.
  • the device comprises a light source and a recording device, wherein the light source is set up to emit a coherent light beam onto the end cross section of the rope, in particular wire rope, so that the coherent light beam is reflected on the end cross section of the rope, in particular wire rope and speckle occurs depending on the surface quality of the end cross-section and the recording device is set up to record images of speckle patterns that occur at a fixed distance from the end cross-section of the wire rope, so that a condition is determined based on an evaluation of the recorded images of the speckle patterns and/or a change in the state of the wire rope can be determined.
  • Such a device is set up in particular for a preferred optical determination of the surface quality of the rope on the basis of an image recording of speckle patterns, so that the above explanations regarding an advantageous use of the device and preferred embodiments apply analogously.
  • the device according to the last-mentioned embodiment is advantageously characterized by a particular compactness, so that even thin ropes, in particular wire ropes, can be monitored using the device.
  • the computing unit can in particular itself be a processor or a processor unit or can be formed by several processors.
  • the computing unit is preferably intended to carry out a comparison between a current surface condition and a reference surface condition. The comparison can be carried out in particular by comparing recorded speckle patterns.
  • the expression that the evaluation unit, preferably the computing unit, is configured to carry out certain steps preferably means that a computer program product is installed that includes commands to carry out such steps.
  • software is installed on the computing unit, which is set up or includes commands to carry out a comparison between the current surface condition and the reference surface condition. The comparison is preferably made between the current surface condition and the reference surface condition of the end cross section of the rope by comparing recorded images of speckle patterns.
  • the software installed on the computing unit of the device does not have to carry out all steps independently on the device. Instead, the data can be transmitted to an external data processing unit and/or a cloud, which at least partially compares the current surface condition and the reference surface condition.
  • the device comprises a communication unit, wherein the communication unit is set up to transmit a result of an evaluation of the recorded images of speckle patterns to an external data processing unit and / or the communication unit is set up to transmit the recorded images of speckle patterns to an external data processing unit to transmit, the external data processing unit preferably being configured to carry out an evaluation of the recorded images of speckle patterns.
  • raw data can advantageously be transmitted by the communication unit to an external data processing unit for an evaluation of the results Evaluation, for example the comparison of speckle patterns.
  • the result of the evaluation preferably from the computing unit, to be transmitted through the communication unit to an external data processing unit, for example to allow an additional evaluation of the condition and/or the change in condition of the rope.
  • an evaluation of the recorded images of the speckle patterns is transmitted to a control instance, preferably by the communication unit, which can initiate appropriate measures based on the determined status.
  • a system according to claim 25 for monitoring the condition of a rope, in particular a wire rope comprising a described device and a holder, preferably a press clamp, the holder being set up to hold a rope, in particular a wire rope , to be clamped in such a way that an end cross section of the rope can be emitted by a light source with a coherent light beam onto the end cross section of the rope, in particular wire rope, so that the coherent light beam is reflected at the end cross section of the rope, in particular wire rope, and it depends the surface quality of the end cross-section leads to the appearance of speckle and the recording device is set up to record images of speckle patterns that occur at a fixed distance from the end cross-section of the rope, in particular wire rope, so that a state and / or a change in the state of the rope, in particular wire rope, can be determined.
  • the holder preferably means a component with which the rope can be fastened in such a way that an end cross-section is visible, preferably irradiable using a light source.
  • the holder preferably offers, on the one hand, sufficient mechanical stability and optical visibility of the end cross-section of the rope, in particular of the wire rope.
  • the holder can be a press clamp or press clamp, as will be explained in more detail below.
  • a press clamp on a rope comprising a rope, in particular a wire rope, and a press clamp pressed with the rope.
  • the press clamping is characterized in that the rope in the area of compression with the press clamp has at least a predetermined area of high compression of elements of the rope, preferably of wires and / or strands of the rope, and at least a predetermined area of low compression of elements of the rope, preferably of wires and / or strands of the rope, in which the compression of the elements, preferably the wires and / or strands, of the rope relative to one another is lower in comparison to the area of high compression.
  • the at least one area of high compression and the at least one area of low compression By providing the at least one area of high compression and the at least one area of low compression, it can be achieved that when a limit force in the press clamping is exceeded, a relative movement of an element of the rope initially only occurs in the area of lower compression, while the area of high compression is still complete is functional. In other words, it can be achieved that parts of the rope that are not safety-critical experience a controlled relative movement when the predetermined limit force is exceeded.
  • the areas designated as safety-critical do not yet experience an overload event at the limit force, so that they can continue to provide the transmission of the rope force, meaning that the rope and the press clamping are not subject to failure overall.
  • the press clamp is suitable for monitoring the condition of the rope.
  • At least part of the low compression area can provide a predetermined monitoring area, wherein the low compression area is preferably designed such that when a predetermined force, which can be referred to as a limit force, is applied to the press clamping, preferably when a between rope is applied and press clamp acting force in the rope direction, a relative movement, preferably an axial displacement, of at least one wire and / or at least one strand and / or at least one insert or core of the area of low compression in the rope direction.
  • the axial displacement in the cable direction when the predetermined force is applied and/or exceeded is preferably at least 1 pm, preferably at least 10 pm, particularly preferably at least 50 pm, very particularly preferably at least 100 pm. Accordingly, only the specified or predetermined monitoring area needs to be monitored in order to monitor the integrity of the press clamping and in particular of the rope.
  • a foreign substance can be arranged between the inside of the press clamp and the radial outside of the rope to increase the friction between the rope and the press clamp, preferably between the outer wires of the rope and the press clamp, and / or there can be at least one outer strand between the wires of the rope, preferably between the wires of each outer strand, a foreign substance to increase the friction between the wires of the at least one outer strand, and / or between at least two outer strands, preferably between all outer strands, a foreign substance to increase the friction between the outer wires of the outer strands be arranged.
  • an area of high compression can be provided in the area where the foreign substance is introduced, which has a higher compression of its elements among themselves than other areas of the press clamping which do not have a friction-increasing filler.
  • a manufacturing method for a press clamp comprising inserting a rope, preferably a wire rope, into a rope receiving opening of a press clamp sleeve, and pressing the press clamp sleeve and the rope inserted into the press clamp sleeve.
  • the pressing takes place in such a way that the rope in the area of the press clamping receives at least one predetermined area of high compression and at least one predetermined area of low compression, in which the compression of the wires and / or strands of the rope to one another is less compared to the area of high compression .
  • the pressing can include a plurality of successive pressing processes, with at least two pressing processes having differently oriented pressing directions, and/or that before pressing a foreign substance is used to increase the friction between the inside of the press clamp sleeve and the radial outside of the rope, preferably between the outer wires of the rope and the ferrule, and/or between the Wires at least one outer strand of the rope, preferably between the wires of each outer strand, and / or between at least two outer strands, preferably between all outer strands, is introduced.
  • Figure 2 shows a schematic sectional view through the press clamping from Figure 1 with a device for monitoring the condition of a rope;
  • Figures 4 and 5 schematically show the sectional views from Figures 2 and 3, with a device for monitoring the condition of a rope according to a further embodiment
  • Figures 6A-6H each show a schematic sectional view of different versions of a press clamp for monitoring the condition of the rope pressed therein;
  • Figure 8 shows a schematic perspective view of an end face of a further press clamp with an end cross section of a rope pressed in the press clamp.
  • Figure 9 shows a schematic view of a press clamp and a device for monitoring an end cross section of a rope.
  • Figure 10 schematically represents a schematic view of an arrangement of components for recording images of speckle patterns.
  • the press clamp 1 shows a schematic perspective view of an end face of a press clamp 1 with an end cross section 3 of a rope 2 pressed in the press clamp.
  • the press clamp 1 comprises the rope 2 and a press clamp 4 pressed with the rope 2.
  • the rope 2 is designed as a wire rope. It comprises a central core strand 5 and a plurality of outer strands 6 arranged around the core strand in the circumferential direction based on an axial rope (longitudinal) direction 8 of the rope 2. All strands 5, 6 of the rope 2 each comprise a plurality of wires 8, which in one of the outer strands 6 is shown schematically in Figure 1, but is not shown for the sake of clarity for the remaining strands 5, 6.
  • FIG. 3 a further sectional view of the press clamping 1 from Figure 1 corresponding to Figure 2 can be seen schematically.
  • two of the wires 7 'of the core strand 5 have been moved in the rope direction 8, since the rope 2 has experienced a force above a predetermined force and below a maximum force, at which the areas of high compression 9 would also be damaged. Since the maximum force was not exceeded, the strands 7 of the outer strands 6 are essentially unchanged from their position in Figure 2. Accordingly, the surface quality of the end cross section 3 has undergone a change only in a partial area 16, which is determined by the displaced wires 7 '.
  • the end cross section 3 is present at a free front end of the press clamp 1, corresponding to Figures 1 to 5.
  • 7 shows schematically a further sectional view of the press clamp 1 from FIG to be insertable into the through hole in an insertion direction 12 which corresponds to the longitudinal axis of the hole. Accordingly, the device 12, as can be seen from Figure 7, has dimensions perpendicular to the insertion direction 12, which are smaller than the bore diameter 22.
  • Figure 10B shows a speckle pattern 26 measured using the arrangement of Figure 10A.
  • 11 shows exemplary recordings of speckle patterns 26 for determining a state and/or a change in state of the end cross-section of a rope.
  • the left figure shows a speckle pattern with no load, while the figure in the middle shows a speckle pattern with a load in the rope direction.
  • the right figure shows the numerical difference between the two speckle patterns, in which a difference in the cross section at the different times (no load on the left, load on the right) can be clearly seen.
  • a method according to the invention allows continuous and time-unlimited (i.e. not just selective) monitoring of the rope at its end cross-section.
  • the method according to the invention is therefore not limited to a point-by-point representation of the rope condition at a selected point in time compared to a reference state with the aim of observing deviations at this selected point in time.
  • the claimed method is characterized by continuous and not selective observation of the rope condition.

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  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

L'invention se rapporte à un procédé de surveillance de l'état d'un câble (2), en particulier d'un câble métallique, comprenant les étapes consistant : à fournir une qualité de surface de référence d'une section transversale côté extrémité (3) d'un câble (2), en particulier d'un câble métallique ; à déterminer une qualité de surface actuelle de la section transversale côté extrémité (3) ; à déterminer un état et/ou un changement d'état du câble (2) par comparaison de la qualité de surface de référence et de la qualité de surface actuellement déterminée, un changement dans une section (16) de la qualité de surface indiquant un changement d'état du câble. L'invention se rapporte également à un dispositif correspondant (12), à une pince de serrage (1) et à un procédé de production d'une telle pince de serrage (1).
PCT/EP2023/066492 2022-06-17 2023-06-19 Procédé et dispositif de surveillance de l'état d'un câble et pince de serrage WO2023242443A1 (fr)

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EPPCT/EP2022/066629 2022-06-17
PCT/EP2022/066629 WO2023241814A1 (fr) 2022-06-17 2022-06-17 Procédé et dispositif de surveillance de l'état d'un câble et bride de presse

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WO2023242443A1 true WO2023242443A1 (fr) 2023-12-21

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PCT/EP2022/066629 WO2023241814A1 (fr) 2022-06-17 2022-06-17 Procédé et dispositif de surveillance de l'état d'un câble et bride de presse
PCT/EP2023/066492 WO2023242443A1 (fr) 2022-06-17 2023-06-19 Procédé et dispositif de surveillance de l'état d'un câble et pince de serrage

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB971804A (en) * 1960-11-24 1964-10-07 Texmetaux A G A method for swaging a sleeve on the end of a steel wire cable,and a cable provided with a sleeve by the application of this method
JPS53114950A (en) * 1977-03-16 1978-10-06 Shinko Wire Co Ltd Method of setting end of p*c*steel twisted wire
JPH06225423A (ja) * 1993-01-18 1994-08-12 Sumitomo Wiring Syst Ltd 電線端部の皮剥加工検査装置
JP2011128136A (ja) * 2009-11-19 2011-06-30 Shinmaywa Industries Ltd 被覆電線検査装置およびそれを備えた電線処理機
WO2017188171A1 (fr) * 2016-04-26 2017-11-02 住友電装株式会社 Dispositif d'inspection pour inspecter une partie de fil central exposée d'un fil électrique
EP3485998A1 (fr) 2017-11-16 2019-05-22 Gebrüder Wanner GmbH Sertissage et procédé de production d'un sertissage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB971804A (en) * 1960-11-24 1964-10-07 Texmetaux A G A method for swaging a sleeve on the end of a steel wire cable,and a cable provided with a sleeve by the application of this method
JPS53114950A (en) * 1977-03-16 1978-10-06 Shinko Wire Co Ltd Method of setting end of p*c*steel twisted wire
JPH06225423A (ja) * 1993-01-18 1994-08-12 Sumitomo Wiring Syst Ltd 電線端部の皮剥加工検査装置
JP2011128136A (ja) * 2009-11-19 2011-06-30 Shinmaywa Industries Ltd 被覆電線検査装置およびそれを備えた電線処理機
WO2017188171A1 (fr) * 2016-04-26 2017-11-02 住友電装株式会社 Dispositif d'inspection pour inspecter une partie de fil central exposée d'un fil électrique
EP3485998A1 (fr) 2017-11-16 2019-05-22 Gebrüder Wanner GmbH Sertissage et procédé de production d'un sertissage

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