EP3184191A1 - Straightening device for straightening cables - Google Patents

Abstract

A straightening device (1) for straightening cables (2) has two rows of rollers (3, 4), an adjusting device (5) for manually setting the distance (d) between the rollers (20.1 .. 20.6; 21.1 .. 21.7) Roller rows (3, 4), a measuring device (6) for detecting the distance (d) between the rollers (20.1 .. 20.6; 21.1 .. 21.7) of the roller rows (3, 4) and a display device (8), with the Deviations of the actual value of the roller spacing (d) determined by means of the measuring device (6) can be visually displayed from a desired value. The display device (8) has two optical error indicator elements (22, 23) for displaying an actual value which is too high relative to the nominal value of the directional parameter (d) or too low an actual value, and an optical good indicator element (24) for indicating that the Actual value matches the target value, on.

Description

The invention relates to a straightening device for straightening cables according to the preamble of claim 1. Furthermore, the invention relates to a method for operating such a straightening device. The straightening device may be part of a cable processing machine. Such cable processing machines are used for the assembly of electrical cables. When assembling cables, cables can be cut to length and stripped, and then the cable ends can be crimped. The cable processing machines may further include grommets where the stripped cable ends are fitted with grommets prior to crimping.

The cables, such as insulated strands or solid conductors of copper or steel, which are processed on a cable processing machine, are usually provided in barrels, on rolls or as a bundle and are therefore more or less curved and swirled after unrolling. Straight-line cables are important in order to be able to reliably carry out process steps provided on the cable processing machine, such as stripping, crimping and optionally fitting with connector housings. To straighten the cables as straight as possible, they are usually pulled by one or more straighteners mounted on the machine's inlet using the drives present in the cable processing machine.

A genus moderately comparable straightening device is for example from the EP 2 399 856 A1 known. The straightening device has an upper and a lower roller row, which can be moved relative to each other for adjusting the straightening parameters. The cable to be straightened is passed between the rollers of the two roller assemblies. The distance between the rollers can be adjusted manually by means of a set screw or a rotary knob. For this purpose, the adjusting device has a scale which is labeled with different cable dimensions, or a sensor which measures the distance between the roller plates relative to one another. When manually adjusting the roller spacing with these adjustment tools, the user alone is responsible for properly adjusting the straightening device, which is prone to error. According to EP 2 399 856 A1 Alternatively, the adjustment of the roller spacing can also be fully automatic. For this purpose, for example, the feed mechanism for moving the upper roller row provided with a motor drive against the lower row of rollers. However, this variant is technically complicated and cost-intensive.

It is therefore an object of the present invention to avoid the disadvantages of the known and in particular to provide a straightening device of the type mentioned, with the straightening parameters and in particular the distance between the rollers of the rows of rollers can be adjusted easily and effectively. The straightening device should be able to be set in a reliable and precise manner without incurring high costs.

This object is achieved according to the invention with a straightening device with the features of claim 1. The straightening device has a first row of rollers with a plurality of rollers and a second row of rollers with a plurality of rollers. The two rows of rollers could be arranged in the installed state, for example, as upper and lower roller row in the straightening device. The first row of rollers and the second row of rollers are arranged opposite each other and the cable is alternately in a transport direction between each with respect to the transport direction successively arranged rollers of the first row of rollers and rollers of the second row of rollers feasible. The straightening device further comprises an adjusting device for manually adjusting the distance between the rollers of the first and the rollers of the second roller row and a measuring device for detecting at least one straightening parameter. The mentioned measuring device may in particular be a measuring device for detecting the distance (as the first parameter for the straightening process) between the rollers of the first and the second row of rollers. The distance between the rollers may preferably be measured in the region of the output side rollers of the opposite rows of rollers. For certain applications, however, it would also be conceivable to additionally or alternatively measure the distance of the input-side rollers or the input rollers and to take into account for the adjustment. The measuring device can be connected to a control device or connectable. For example, the meter may communicate with the controller, which may be a central machine controller for a cable processing machine, via an analog or digital interface.

Characterized in that the straightening device has a preferably also connected to said control device or connectable display device, with the deviations A determined by means of the measuring device actual value of the directional parameter of a target value for the directional parameter, for example, the role distance visually, acoustically and / or tactile displayable, the straightening device can be easily, inexpensively and easily set. The display device facilitates the user's correct manual adjustment of the straightening device with respect to the cable to be processed. Incorrect settings, which can lead to inferiorly assembled cable ends, can thus be practically excluded. The setpoint, for example for the roll spacing, can be calculated automatically from the cable data of the cable to be processed. For example, the previously known or previously measured outside diameter of the cable can be taken into account in the nominal value of the roller spacing. The desired value can be stored as a mathematical function or as a table in the control device.

According to a first embodiment, the display device has at least one error display element for displaying a value that is too high relative to the setpoint value of the directional parameter and / or for displaying an actual value that is too low compared to the setpoint value of the directional parameter. This arrangement allows an intuitive user guidance with regard to a correct setting of the straightening device. Such a display device signals to the user whether and how he must change the setting of the straightening device by operating the adjustment.

The error display element can emit a beep, for example, the volume, pitch and / or beep frequency changes depending on the size of the deviation between the setpoint and the actual value. If the user in a faulty operation of the adjustment, for example, if he moves the rows of rollers in the wrong direction, the acoustic fault indicator can indicate this by a faster beeping. The beeping slows down when the rows of reels are moved relatively in the right direction. However, the display device may preferably have at least one optical error display element that can display a high actual value and / or too low actual value compared to the setpoint value of the directional parameter. The optical defect display element can have light sources with one or more light-emitting diodes (LED).

Particularly preferably, the light source for the fault indication is designed such that it lights up red when needed, or when enabled, when the condition is met (ie, actual value too high or too low). For this example, red LEDs can be used. It is also conceivable to use one or more white LEDs, which are arranged behind a red translucent wall. The display device could be further configured such that by varying the light intensity, flashing light and / or changing the light, the user intuitively indicates in which direction the roller rows are to be moved to set the distance.

The display device may further comprise an optical good display element for indicating that the actual value coincides with the desired value or that the actual value is within a predefined value range around the desired value of the directional parameter. Once the good indicator is activated, the user learns immediately that he has correctly set the straightening device at least in relation to the straightening parameters to be set and he can now end the adjustment process.

It is advantageous if the display device comprises two fault indicator elements and a good indicator element, wherein the good indicator element can be arranged for example between the fault indicator elements. By this arrangement, the user a particularly simple manual adjustment of the straightening device allows.

The fault indicator elements and the good indicator element can be designed such that they light up when activated in different colors. For example, the error indicator elements may glow red and the good indicator element may light green. As an alternative to the three mentioned optical display elements, the display device could also have a common fault and good indicator element which can emit both red and green light. If the user makes the correct setting in this case, then the previously red glowing element is switched to green.

Furthermore, the display device may comprise a digital display for numerically representing a directional parameter value. The digital display can display, for example, the actual value determined by the measuring device, for example the actual value of the measured roller spacing. However, the display device could also be designed such that the digital display additionally or at most alternatively assigned to the cable Indicates target value.

The measuring device may comprise a potentiometric displacement sensor for detecting the distance between the rollers of the first and second roller assemblies. Of course, other sensors could be used for the detection of the role distance. The potentiometric displacement sensor has the advantage that it is inexpensive, but still delivers good measurement results.

The measuring device can be connected or connectable to a memory unit with which the actual values and / or the deviations of the actual values from the desired value of the respective directional parameter are recorded for logging. The logging of deviations from the ideal position at the start of production serves for quality assurance.

If the measuring device is connected or connectable to a control device, it can be advantageous if the control device is programmed in such a way that a production mode is blocked if the actual value does not coincide with the setpoint value; in other words, if the straightening parameter (s) are not set correctly. The production operation is characterized in that the cable is drawn between the rollers of the first and the second row of rollers for feeding to the respective processing stations of the cable processing machine for straightening the cable.

The adjusting means may comprise a knob or a set screw for manually adjusting the distance between the rollers of the first and second rows of rollers.

The straightening device may further comprise means for adjusting the angle between the roller lines given by the rows of rollers. This angle can also be measured by means of corresponding sensors. The angle represents a second or further directional parameter that is taken into account or can be displayed in or by the described or another display device.

Another aspect of the invention relates to a method for operating the previously mentioned straightening device, in particular using the straightening device described above. With this method, the straightening device can be easily adjusted and thus be set up in mass production of prefabricated cables in the cable processing machine. In a first step, the cable to be straightened is introduced into an intermediate space between rollers of the first roller row and rollers of the second roller row opposite the first roller row. The two rows of rollers are then moved toward each other so that the cable is hit by the rollers of the rows of rollers with respect to the subsequent straightening process by the rollers. In carrying out the relative feed motion to bring the first row of reels and the second row of reels into contact with the cable, manual adjustment of the adjustment takes place. Thereafter, the actual value of at least one directional parameter is averaged by means of the measuring device. The determined actual value is compared in the control device with the desired value for the respective directional parameter. If the comparison of the two values results in a non-permissible deviation between actual value and desired value, the display device generates a visual, audible and / or tactile error signal for user guidance. The relative feed movement is continued and the measurement and comparison operations repeated until the error signal of the display device disappears and / or until the display device generates a Gutsignal for indicating that the actual value coincides with the desired value.

Fig. 1

eine perspektivische Darstellung einer Kabelbearbeitungsmaschine umfassend eine erfindungsgemässe Richtvorrichtung zum Richten von Kabeln,

Fig. 2

eine vereinfachte Darstellung der Richtvorrichtung aus Fig. 1,

Fig. 3

eine perspektivische Darstellung der Richtvorrichtung,

Fig. 4

eine Rückansicht der Richtvorrichtung gemäss Fig. 3,

Fig. 5a

eine Vorderansicht der Richtvorrichtung in geöffnetem Zustand,

Fig. 5b

die Richtvorrichtung aus Fig. 5a, jedoch in aktivem Zustand,

Fig. 6a

die Richtvorrichtung aus Fig. 5a in einer Querschnittsdarstellung (Schnittlinie B-B gemäss Fig. 5a), und

Fig. 6b

einen Querschnitt durch die Richtvorrichtung in aktivem Zustand (Schnittlinie A-A gemäss Fig. 5b).

Further advantages and individual features will become apparent from the following description of an embodiment and from the drawings. Show it:

Fig. 1

a perspective view of a cable processing machine comprising an inventive straightening device for straightening cables,

Fig. 2

a simplified representation of the straightening device Fig. 1 .

Fig. 3

a perspective view of the straightening device,

Fig. 4

a rear view of the straightening device according Fig. 3 .

Fig. 5a

a front view of the straightening device in the open state,

Fig. 5b

the straightening device Fig. 5a but in active condition,

Fig. 6a

the straightening device Fig. 5a in a cross-sectional view (section line BB according to Fig. 5a ), and

Fig. 6b

a cross section through the straightening device in the active state (section line AA according to Fig. 5b ).

Fig. 1 shows a generally designated 10 cable processing machine for assembling cables. In the present case, the cable processing machine 10 is designed, for example, as a swivel machine and has a swivel unit 13 with a cable gripper 14. To feed the cable ends to the processing stations (not shown), such as a spout station and a crimping station, the pivot unit 13 must be rotated about a vertical axis. A (also not shown here) cutting and stripping is usually arranged on the machine axis. The cable processing machine 10 further comprises a feed unit with a designed as a belt conveyor cable conveyor 12, which brings the cable in the direction indicated by the arrow x transport direction along the machine axis to the pivot unit 13. When feeding the cable, the cable 2 is pulled by a designated 1 straightening device for straightening the cable 2.

The cable processing machine 10 can be used to process electrical cables, for example insulated strands or insulated conductors made of copper or steel. The cables to be processed are provided in barrels (not shown) on rollers or as a bundle. The supplied from barrels, rolls or bundles of the cable processing machine 10 cables 2 are more or less curved and provided with swirl. The cable 2 must therefore be straightened, to which the already mentioned straightening device 1 is used. In front of the straightening device 1 there is a node detection device 11 for preventing unwanted cable nodes from entering the cable processing machine. When the cable 2 is passed between the rollers of the lower roller row 3 and the upper roller row 4, it is mutually mechanically acted upon by the rollers of the roller rows 3, 4 and thereby bent, whereby the cable 2 is directed.

By means of an adjusting device 5, the distance between the rollers of the first row of rollers 3 and the rollers of the second row of rollers 4 can be adjusted. The correct adjustment of the straightening device 1 is essential to the quality of the subsequently processed cable processing machine 10 cable. It is especially important to set the correct distance between the rollers of the upper and lower roller rows. Incorrect settings can negatively affect the straightening quality or straightness of the cable. Incorrectly adjusted straightening devices 1 can lead to inaccurate stripping lengths or have a negative effect on the quality of the crimped connection.

In Fig. 2 the overall structure of the inventive straightening device 1 for the previously described cable processing machine is shown. The straightening device 1 comprises the two rows of rollers 3 and 4. When turning a knob 19 of the adjusting device 5, the rows of rollers 3 and 4 can be moved toward or away from each other. The vertical direction to the longitudinal axis of the cable 2 and perpendicular to the transport direction x extending direction of movement is indicated by a double arrow. By manual actuation of the adjusting device 5, the distance d between the rollers of the upper and lower roller row 3, 4 can thus be changed ersichtlicherweise.

The distance d is detected by a measuring device 6 and can be displayed numerically in a display device 8. However, the exemplary value "1.234 mm" corresponds in the present embodiment, however, a determined value for the clear width between guide surfaces of the rollers of the upper and lower roller row 3 and 4, if in each case a cable or optionally a stiff pin for calibrating the straightening device 1 between the rollers parallel roller rows 3 and 4 is clamped. It thus corresponds approximately to the cable diameter of the cable 2 Fig. 2 would thus be about 1,234 mm. Of course, the digital display 25 can also display other values. As already mentioned above, the display device 8 could also be designed such that the actual value for the roller spacing d is displayed in the digital display 25.

The measuring device 6 is connected to a control device 7, for example, a central machine control of the cable processing machine. In the control device 7, the actual value of the roller spacing d determined by means of the measuring device 6 is compared with a desired value for the roller distance. The setpoint for the roll spacing can be automatically calculated from the known cable data of the cable to be processed 2, for example, due to the outer diameter of the cable 2. The target value for the roll distance can also be stored as a mathematical function or as a table in the controller 7.

The distance d between the rollers will be measured in the region of the output-side rollers 20.6 and 21.7 of the opposite rows of rollers 3 and 4. However, it would also be conceivable to measure alternatively or additionally the input-side roll spacing. In this case, the distance between the rollers 20.1 and 21.1 would be measured.

Deviations of the actual value from the desired value of the roller spacing d can be visually displayed. For this purpose, the display device 8 has two fault indicator elements 22 and 23 and a good indicator 24. If the measured roll distance d is too large, then the labeled with "too high" error indicator 22 lights up. If the measured roll distance d is too small, the fault indicator element labeled "too low" will light up. The two fault indicator elements 22 and 23 are designed as light-emitting elements and have, by way of example, in each case a red or at least red-emitting light-emitting diode (in short: "LED"). Between the two fault indicator elements 22 and 23, a good indicator 24 is arranged. The good display element 24 is designed as a light-emitting element and has a green or white light-emitting diode.

If the actual value coincides with the target value for the roll distance d, then the luminous element 24 is activated for the good indication and lights up white or green. The coincidence of the actual value with the target value corresponds to the state when the straightening device is set correctly. It should be noted that the match can already exist if the actual value is within a predefined range or band for the target value. An exact match of two singular values is thus evidently not required. Thanks to this display device, the user who operates the setting device 6 can be guided in an intuitive manner with regard to the setting of the directional parameters. Thanks to the two error indicator elements 22 and 23, the user knows whether and in which direction the rows of rollers 3, 4 must be adjusted by turning the knob 19 of the adjusting device 6. Denoted at 26 is a memory unit with which the measured data is logged can be.

Furthermore, it would also be conceivable to design the numerical display 25 in such a way that it can display the various states, for example by different lighting or by using different colors. For example, the digital display 25 may comprise LEDs which generate a backlight depending on the setting state. Next, the frame could be illuminated around the display panel 29. Depending on the state, ie if there is an excessively high or too low actual value in comparison to the setpoint value for the roll spacing, then this could be indicated by the digital display 25 by a frame of the display field 29 that lights up in red.

The display device 8 could further be configured such that, in addition to the visual display, it can acoustically display deviations of the actual values determined by means of the measuring device 6 from the desired value. It would also be conceivable to provide a vibration generator in the region of the rotary knob of the adjusting device. For example, by vibrating the knob, the user might be indicated to turn the knob in the wrong direction.

Design details for the design of the straightening device 1 can from the 3 and 4 as well as the Fig. 5a to 6b be removed. In the present embodiment, the straightening device 1 six with respect to the transport direction x successively arranged rollers of the lower roller row 3. The roles are designated 20.1 to 20.6. The lower roller row 3 opposite the upper roller row 4 is arranged, which has seven rollers. The first or input side foremost role is denoted by 21.1 and the last or output side rearmost role is denoted by 21.7.

Before the rollers of the roller rows 3 and 4, a guide roller 28 is arranged with a larger diameter at which the cable 2 undergoes the largest bend. The respective rollers 20.1 to 20.6 or 21.1 to 21.7 of the upper and lower roller row 3, 4 are each freely rotatably mounted on roller plates 17 and 18. The roller plates 17 and 18 are mounted in the vertical direction or perpendicular to the cable longitudinal axis x relative to each other displaceable. In the present embodiment, the upper roller plate 18 can be moved by turning the knob 19 is still up or down. So that the cable can be easily inserted into the straightening device 1, has the straightening device 1 for quick opening a quick release lever 31 with an eccentric 15. The upper roller plate 18 is guided by a guide perpendicular to the transport direction x of the cable 2 to a base plate 33. The roller plate 18 is pressed by means of a compression spring 16 in the open state ( Fig. 4 ). The quick release lever 31, the eccentric 15 and the upper roller plate 18 can easily and precisely with an adjusting screw or the knob 19 via a spindle 32 (see Fig. 6a ) perpendicular to the machine longitudinal axis or to the transport direction x to the lower roller plate 19 or moved away and so the roller spacing d are set. The roller lines represented by the dashed lines of the rollers 20.1 to 20.6 on one side and the rollers 21.1 to 21.7 on the other side have in the position according to Fig. 3 a more or less parallel course. As long as only the adjuster 5 is operated with the knob 19, the remaining roller lines would remain parallel to each other.

Since the input-side rollers of the straightening device develop the greatest directivity, a parallel alignment of the roller lines is often not desirable for operation. To set an angle (as - with respect to the roller spacing as the first directional parameter - second directional parameter) of the roller lines, the straightening device 1 with a pneumatic cylinder 9, as shown in the EP 2 399 856 A1 described, be equipped. The lower roller plate 17 is rotatably mounted about a peripheral axis 27. The axis 27 is presently arranged next to the axis of rotation of the last roller 20.6 of the lower roller row 3. It would also be conceivable to let the axis for the rotational movement of the roller plate 17 coincide with the axis of rotation of the last roller 20.6. In this case, the output side roller pitch d would not change when the lower roller plate 17 makes a slight rotational movement.

The lower roller plate 17 with the first row of rollers 3 can thus be inclined relative to the upper roller plate 18 with the second row of rollers 4 by the aforementioned rotational movement about the axis 27. The rollers press here on the input side more on the cable 2, which is pulled by the straightening device 1. Thus, the straightening device 1 effects a directivity decreasing in the transport direction x of the cable 2 from the first rollers 20.1, 21.1 to the last rollers 20.6, 21.7. The pneumatic cylinder 9 can be controlled via a valve. The pressure of the pneumatic cylinder 9 and thus the force that presses the input side on the cable 2, can be adjusted via a pressure regulator.

After the roller spacing d, the angle between the roller lines predetermined by the rollers of the roller rows 3, 4 is the second directional parameter. This angle can be adjusted by means of the previously described pneumatic cylinder 9 or by means of a possibly manually operable (not shown) adjusting device for pivoting the lower roller plate 17. Alternatively, the angular position between the rows of rollers 3, 4 could be set to a fixed value, which is usually between 0 ° and 5 °. For the positional fixation of this angular position, for example (not shown) screws can be used, which is feasible when pivoting the lower roller plate in a corresponding slot. The angle can also be detected by a measuring device and this measuring device can be connected to the control device 7 and a display device such that an incorrect angular position is displayed to the user. For example, after setting the correct roll spacing in a first set-up phase, the user can adjust the angle by means of the adjusting device for pivoting the lower roll plate. Thanks to a corresponding display device, which can be carried out analogously to the already described, the role distance associated with the display device, the angle can be adjusted easily and without much effort. On an automatic execution according to EP 2 399 856 A1 , which makes relatively high demands and therefore is expensive, could be dispensed with.

From the rear view of the straightening device 1 according Fig. 4 is a socket 30 recognizable. The socket 30 may for example be a digital interface to the (not shown) control device. The measuring device 6 for detecting the distance between the rollers of the upper and lower roller row communicates via this interface with the control unit. Furthermore, in Fig. 4 a compression spring 16 recognizable.

The Fig. 5a and 6a show the straightening device 1 in an open position. In this open position, the roles of the two rows of rollers 3, 4 are so far apart that a sufficiently large gap is created through which the cable can be inserted. After insertion of the cable, the roller rows are preferably first by means of a quick release comprising the quick release lever 31 against each other in the vertical direction. In this closed position are the parallel rollers of the upper and lower roller row 3, 4 close to the cable, so that it is now possible to start with the actual setting of the straightening device 1. The user can now turn the knob 19 of the setting 5 clockwise, causing the upper roller plate 18 is moved with the upper roller row 4 down against the lower roller row 3.

The user performs this relative feed movement by manual actuation of the adjusting device 5 until the rollers 20.1 .. 20.6 of the first row of rollers 3 and the rollers 21.1 .. 21.7 of the second row of rollers 4 contact the cable 2. The user can determine the approximate contact by visual inspection. Then he checks the display device 8. When the error indicator 22 lights red, then the rows of rollers 3 and 4 are still too far apart. The measured actual value for the distance d between the rollers 20.1 .. 20.6 and the rollers 21.1 .. 21.7 of the first and the second row of rollers 3, 4 with respect to the desired value for the roller distance d is in other words too high. On the basis of the display device 8, the user thus indirectly receives the instruction to continue to turn the knob 19 in the same direction of rotation. He does this until the good indicator 24 of the display device 8 glows green. A Gutsignal is generated, indicating that the actual value of the roll distance matches the corresponding target value. If the user rotates too long on the rotary knob 19, the error indicator element 23 lights up red due to the small roller spacing.

The measured value for the roller spacing d is displayed with a digital display 25, the three LEDs of the error indicator elements 22, 23 and the good indicator 24 signal to the user whether he should close or open the straightening device 1 in order to achieve the desired setpoint for the roll distance. The operator rotates the rotary knob 19 until the green LED of the good indicator element 24 lights up when the setpoint value is reached. Thereupon, the control unit 7 assigned to the machine control releases the production of the cable. The active position, in which the straightening device 1 is set correctly, is in Fig. 5b and 6b shown. If necessary, after adjusting the roller spacing, the angular position of the roller rows 3, 4 can be changed in a conventional manner by switching on or automatic actuation of the pneumatic cylinder 9. The angular position of the rows of rollers 3, 4 could also be changed manually after a corresponding transformation of the straightening device 1 and adjusted in an analogous manner as the roller distance.

Claims (12)

Straightening device (1) for straightening cables (2) comprising: - A first row of rollers (3) and a second row of rollers (4), the cable (2) in a transport direction (x) alternately between rollers (20.1 .. 20.6) of the first row of rollers (3) and rollers (21.1 .. 21.7 ) of the second row of rollers (4) is feasible, - An adjustment (5) for manually setting the distance (d) between the rollers (20.1 .. 20.6; 21.1 .. 21.7) of the first and second roller row (3, 4), and - A measuring device (6) for detecting at least one directional parameter (d) and in particular the distance (d) between the rollers (20.1 .. 20.6; 21.1 .. 21.7) of the first and second roller row (3, 4), characterized in that the straightening device (1) has a display device (8), with the deviations of an actual value determined by the measuring device (6) from a desired value of the at least one straightening parameter (d) visually, acoustically and / or tactile displayable is. Straightening device (1) according to claim 1, characterized in that the display device (8) at least one fault display element (22, 23) for displaying a relation to the desired value of the directional parameter (d) too high actual value and / or to display a opposite the setpoint value of the directional parameter (d) to low actual value. Straightening device (1) according to claim 1 or 2, characterized in that the display device (8) at least one optical error display element (22, 23) for displaying a relation to the desired value of the directional parameter (d) too high actual value and / or low actual value, wherein the at least one optical fault indicator element (22, 23) has light-emitting means preferably on LED basis. Straightening device (1) according to claim 3, characterized in that the display device (8) comprises an optical material display element (24) for indicating that the actual value coincides with the desired value. Straightening device (1) according to one of claims 1 to 4, characterized in that the display device (8) comprises two fault indicator elements (22, 23) and a good indicator element (24), wherein the good indicator element (24) is preferably arranged between the fault indicator elements (22, 23). Straightening device (1) according to claim 5, characterized in that the error indicator elements (22, 23) and the good indicator element (24) are designed such that they can shine in different colors. Straightening device (1) according to one of claims 1 to 6, characterized in that the display device (8) comprises a digital display (25) for numerically representing a directional parameter value (d). Straightening device (1) according to one of claims 1 to 7, characterized in that the measuring device (6) for detecting the distance (d) between the rollers (20.1 .. 20.6; 21.1 .. 21.7) of the first and the second roller arrangement (3 , 4) has a potentiometric displacement sensor. Straightening device (1) according to one of claims 1 to 8, characterized in that the measuring device (8) with a memory unit (26) is connected or connectable, with the actual values and / or the deviations of the actual values for logging from the target value of the directional parameter (d) are recorded. Straightening device (1) according to one of claims 1 to 9, characterized in that the measuring device (6) with a control device (7) is connected or connectable and that the control device (7) is programmed such that a production operation, in which for straightening of the cable, the cable (2) between the rollers (20.1 .. 20.6; 21.1 .. 21.7) of the first and second roller row (3, 4) is pulled is locked, if the actual value does not match the set value , Straightening device (1) according to one of claims 1 to 10, characterized in that the adjusting device (5) for manually adjusting the distance (d) between the rollers (20.1 .. 20.6; 21.1 .. 21.7) of the first and the second row of rollers ( 3, 4) has a knob or screw (19). Method for operating a straightening device (1) according to one of Claims 1 to 13, characterized in that the following steps are carried out: a) introducing a cable to be straightened (1) into a space between rollers (20.1 .. 20.6) of a first row of rollers (3) and rollers (21.1 .. 21.7) of the first row of rollers (3) opposite the second row of rollers (4); b) performing a relative feed movement by manually operating an adjustment device (12) to move the rollers (20.1 .. 20.6) of the first row of rollers (3) and the rollers (21.1 .. 21.7) of the second row of rollers (4) in contact with the cable ( 2) to bring; c) determining an actual value of at least one directional parameter (d) by means of a measuring device (6), d) comparing the actual value determined by means of the measuring device (6) with a desired value for the directional parameter (d) in a control device (7), e) if the comparison in step d) results in an impermissible deviation, then a display device (8) generates a visual, audible and / or tactile error signal for user guidance, f) the relative feed movement by manual actuation of an adjusting device (5) according to step b) is continued and steps c) to e) are repeated until the error signal of the display device (8) disappears and / or until the display device (8) a Gutsignal to indicate that the actual value matches the target value generated.

Images