JP7258511B2 - Method or apparatus for operating a ring spinning machine - Google Patents

Description

SUMMARY OF THE INVENTION The present invention is a method or apparatus for monitoring the belt tension of a drive belt of a ring spinning machine, said ring spinning machine having a plurality of spinning units, the spindles of said spinning units being rotated during a spinning operation. It relates to a method or device frictionally driven by a circulating tangential belt.

Spinning machines having a plurality of spinning units, the spindles of which are frictionally driven by a circulating tangential belt, have long been known in the textile industry.

Such multi-unit spinning machines, for example ring spinning machines, usually have several identical working units, which are arranged adjacent to each other on both sides of the machine longitudinal axis. and the working mechanisms of these working units are driven together via machine-length cyclic endless traction means.

In the case of ring spinning machines, the individual working units are provided, for example, with freely rotatably supported spindles, and a machine-length circulating tangential belt is used as drive means for a large number of spindles. There are many things. The tangential belt runs, for example, on drive wheels of a spindle drive connected to a frequency converter, which is arranged approximately in the center of the machine, and is guided by deflection rollers at the corners of the textile machine.

In order to ensure reliable entrainment of the spindle work by the circulating tangential belt during the spinning operation, it must be ensured that the tangential belt always rests on the spindle work with a sufficiently high contact pressure.

A machine-length tangential belt, for example, should always have a sufficiently high belt tension, since if the belt tension is too low there is a risk of a so-called slow-running spindle. That is, if the belt tension is too low, the contact pressure of the tangential belts at the drive wave of the spindles will be too low for proper frictional entrainment of the spindles, so that the rotational speed of these spindles will be too low for the ring spinning machine. will drop below a predetermined rpm level.

Since thread material produced on such slow-running spindles is often largely unusable for further processing, the occurrence of such slow-running spindles is prevented as much as possible by various measures. efforts have long been made.

For example, it has long been common to provide manually operable tensioning devices in the region of the recirculating tangential belts of ring spinning machines. Such manually operable tensioning devices are normally operated by the operator whenever the operator determines that the belt tension on the tangential belt is slightly reduced, or the tensioning device is operated. is performed according to a predetermined time plan as a routine.

However, such tensioning devices cannot ensure that the belt tension of the tangential belt is always optimally adjusted throughout the spinning operation, and on the basis of such tensioning devices, the spinning operation It is also not possible to trace at a later point in time what the evolution of the belt tension was during. That is, the operator cannot ascertain when and what value the belt tension of, for example, a textile machine takes.

It is therefore common in the textile industry, in connection with ring spinning machines, to operate the tangential belts driving the spindles with relatively high belt tensions at all times during the entire operating period of the textile machine. In practice, however, too high a belt tension not only imposes an unnecessarily high load on the drive and deflection shafts of the drive and the tangential belt itself, but also increases the energy consumption of the ring spinning machine.

Furthermore, methods and devices for measuring the tension of belts or fabrics are known, both in general mechanical engineering and in the textile industry.

For example, DE 196 16 574 A1 (DE 196 16 574 A1) describes that in the context of a motor vehicle, the tension of a drive belt, which is wound around the belt pulley of the motor vehicle's engine, changes the resonant vibration frequency of this drive belt. The method required based on is described.

From EP 0 100 394 A1 a method is known for measuring and controlling the warp tension in a weaving machine. In this known method, the velocity of propagation of the transverse deflection along the warp bundle is used as the measuring principle. That is, the exciter generates a deflection which reaches the detector after a corresponding time interval.

It is also possible to provide several exciters and detectors, preferably per weaving machine, as described in EP 0 100 394 A1. However, the document does not contain any suggestion as to whether the determined warp tension values are visualized to the operator in any way.

Furthermore, DE 39 40 923 A1 (DE 39 40 923 A1) generally describes a spinning machine with several working units. A work unit is associated with a signal generator that outputs a corresponding fault signal when a fault occurs. The signal generator is connected to a machine control of the spinning machine with a display device, which is connected to a so-called interference signal evaluation device. Based on the fault signal, the fault signal evaluation device initiates a defined control process, for example a normal switch-off program or an emergency switch-off program of the spinning machine.

The methods or devices described above, although well proven in practice, are in some cases very labor intensive and thus expensive. In connection with the monitoring of the belt tension of the drive belts of ring spinning machines, the known methods and devices can only be used to a limited extent and leave considerable room for improvement.

DE 196 16 574 A1 European Patent Application Publication No. 0100394 DE 39 40 923 A1

Starting from the above-mentioned prior art, the problem underlying the present invention is to ensure a simple and reliable monitoring of the belt tension of the tangential belt of the machine length over the entire operating time of the ring spinning machine and to make it visible to the operator. to develop a method or device that

To solve the above problem, according to the present invention, the belt tension of the tangential belt is monitored by a sensor device connected to the machine control section of the ring spinning machine, and the belt tension data detected by the sensor device is It is solved by processing in the machine control and visualization through the display.

Advantageous embodiments of the method according to the invention and of the device for carrying out the method are subject matter of the dependent claims.

The method according to the present invention allows the operator to constantly receive information about the current belt tension data of the ring spinning machine and, taking into account the representation visualized on the display, the belt tension data to correctly produce the spinning cops. In addition to the advantage that it is possible to ensure that the belt tension is always maintained within the optimum range that can be set, the operator can tell what belt tension data existed at a given point in time for the ring spinning machine. has the advantage that it can be checked later whenever necessary. For example, if there is a risk that the ring spinning machine will no longer be able to maintain the specified belt tension data in the near future, for example because the tangential belt has stretched due to aging, the operator can start replacing the tangential belt in a timely manner. In addition, if desired, the belt tension data stored in the machine control can be used to derive inferences about a potentially faulty spinning cop.

In an advantageous embodiment, said machine control initiates a reaction when it determines that said belt tension data for said tangential belt is about to reach a settable minimum value or a settable maximum value. That is, the machine control causes a warning device that is perceptible to the operator to be activated.

In practice, the machine control indicates, for example on the basis of an optical signal, that intervention by the operator is recommended, for example by means of a relatively conspicuous flashing light. However, it is also possible to implement this warning in the form of an acoustic signal that is equally understood by the operator as a sign that manual intervention should be carried out as quickly as possible. That is, the operator is prompted by the warning signal to slightly increase the tension on the tangential belt, for example by means of a belt tensioning device.

Such belt tensioning devices typically have a slidably supported belt pulley which can be positioned in a defined manner either manually or by means of an electronic adjustment drive. can be done. Such known belt tensioning devices are distinguished not only by high reliability but also by excellent functionality.

However, in another embodiment, the machine control can also voluntarily cause the ring spinning machine to turn off immediately and automatically if required. In such cases, it is reliably ensured that the ring spinning machine is always operated only with the correct belt tension of its tangential belt.

Further in an advantageous embodiment, said machine control records said belt tension data both during the spinning operation and during the doffing process of said ring spinning machine. In this way it is possible without problems for the operator to follow the belt tension data of the tangential belt as required without gaps over the entire life of the tangential belt, e.g. Inferences about behavior can be drawn.

In another advantageous embodiment, during the spinning operation of the ring spinning machine, the maximum, minimum and average belt tension values of the tangential belt and the position of the ring rails of the ring spinning machine are: displayed on the display. In other words, the operator can easily draw inferences about the running behavior of the tangential belt at any time based on the belt tension values shown on the display and, in some cases, can immediately intervene to correct the belt tension. Become.

A device for carrying out the method according to the invention comprises a sensor device for monitoring the belt tension of a tangential belt of a ring spinning machine, which is connected to a machine control and which is connected to the machine control. has a display capable of processing the detected belt tension data and visualizing said belt tension data of said tangential belt.

That is, the operator is informed at all times about the current belt tension data of the ring spinning machine and, taking into account the visualization visualized on the display, the belt tension data is the configurable optimal value for the correct production of the spinning cop. Not only will it always be possible to immediately arrange for it to always remain within the bounds, but it will soon be possible for a given belt in a ring spinning machine, for example, because the tangential belt has stretched due to aging. It is also possible for the operator to arrange a timely replacement of the tangential belt if there is a risk that the tension data can no longer be maintained. In addition, the operator can later ascertain what belt tension data existed for the ring spinning machine at a given point in time, and this belt tension data stored in the machine control unit. , it is also possible to draw inferences about the spinning cops that may be defective.

In another advantageous embodiment, the sensor device has a movably supported deflection roller corresponding to the load cell. During the spinning operation, the movably supported deflection rollers are positioned according to the current belt tension of the tangential belt of the ring spinning machine, which the load cell records and converts into a corresponding signal, This signal is transferred to the machine control section of the ring spinning machine.

In a further advantageous embodiment, a measured value amplifier is connected to the load cell, said measured value amplifier being connected to the machine control of the ring spinning machine. That is, the signal initiated by the load cell is first of all so that the signal is forwarded to the machine control of the ring spinning machine, which is connected downstream and is equipped with a display, and can be properly processed there. It is processed in the measured value amplifier. On the display of the machine control the belt tension values detected by the load cells are visualized for the operator.

Further details of the invention can be taken from the exemplary embodiments described below on the basis of the drawings.

A circulating tangential belt for frictionally driving the spindles of the working units of the ring spinning machine and a sensor device connected to the machine control of the ring spinning machine for monitoring the belt tension of the tangential belt. 1 is a schematic plan view of a ring spinning machine having a ring spinning machine; FIG. 1 is an enlarged view of a machine control of a ring spinning machine equipped with a display and a sensor device connected to the machine control; FIG. 1 shows a display arranged in the area of a machine control of a ring spinning machine, in which various data concerning the tangential belt generated during the spinning operation of the ring spinning machine are visualized; FIG. FIG. 4 shows the display of FIG. 3 in which further belt tension data for the tangential belt generated during the spinning operation of the ring spinning machine are visualized; Figure 4 shows the display of Figure 3 with belt tension data as occurs during the doffing process on a ring spinning machine;

FIG. 1 shows a ring spinning machine 1 in a highly schematic plan view, the spindles 2 of which are frictionally driven by a circulating tangential belt 3 . Such a ring spinning machine 1 has a plurality of working units on both machine longitudinal sides, each of which is provided with such a spindle 2 . On these spindles 2, as is known and therefore not described in detail, so-called ring-spinning cops are produced, which have a relatively small amount of yarn material and are therefore downstream During the manufacturing process, it is rewound into a twill package on a so-called automatic twill winder.

The spindles 2 of such a ring spinning machine 1 are freely rotatably supported and frictionally driven by a circulating tangential belt 3, which respectively drives the spindle 2. Pressurize the warb. In order to ensure a defined contact pressure of the tangential belt 3 against the wharves of the spindles 2, further so-called pressure rollers 4 are usually provided between the spindles 2, these pressure rollers 4 being preferably two They are arranged in pairs on one spring element 19 and bear against the circulating tangential belt 3 with some pressure.

In the example shown, the tangential belt 3 of the machine length passes, during one revolution, four deflection rollers 5 each arranged at the corners of the machine and a drive wheel arranged on the motor shaft of the spindle drive 6. 7 and the belt pulley 8 of the belt tensioning device 27 . The belt pulley 8 is linearly adjustable supported and can be adjusted manually by an operator or, as shown in the present embodiment, preferably configured as an electric motor drive 11. It can be adjusted by the adjustment drive 10 . The belt pulley 8 is connected to an electric motor drive 11 via, for example, a screw drive 9 . The adjustment drive 10 of the belt tensioning device 27 is in such a case also connected via a control line 20 to the machine control 13 of the ring spinning machine 1 .

A sensor device 12 equipped with a load cell 15 is also provided for monitoring the belt tension of the tangential belt 3 , which sensor device 12 is also connected via a signal line 21 to the machine control of the ring spinning machine 1 . 13, the machine control 13 has a display 23 as can be seen.

In practice, it is common to drive a large number of spindles 2 of a ring spinning machine 1 via a plurality of tangential belts 3, which themselves are each pressurized by separate spindle drives 6. be. Thus, modern ring spinning machines 1 with up to 2000 or more spindles 2 often have up to 18 spindle drives 6, in which case these 18 spindle drives 6 itself drives 96 to 120 spindles 2 each via tangential belts 3 .

The arrangement of sensor device 12 illustrated in FIG. 1 is also only one possible embodiment. That is, the sensor device 12 never has to be arranged in the region of the upper right deflection corner of the tangential belt 3 as shown in FIG. can be placed without problems.

FIG. 2 shows the sensor device 12 for monitoring the belt tension of the tangential belt 3 in an enlarged view. As shown, the sensor device 12 connected to the spindle rail (not shown) of the ring spinning machine 1 via a holding plate 18 and a fixing device 14, for example a threaded bolt, corresponds to the load cell 15, It has a deflection roller 5 which is movably supported. The load cell 15 is connected to the machine control 13 of the ring spinning machine 1 via a signal line 21 in which a measured value amplifier 22 is inserted. The deflecting roller 5 is arranged in a holder 16 which itself is supported for limited rotation about an axis 17 .

During operation of the ring spinning machine 1, the deflection rollers 5 are constantly pressed in the direction of the load cell 15 via the circulating tangential belt 3 with a given belt tension, which is recorded by the load cell 15. , into a corresponding electrical signal S. The load cell 15 is arranged to immediately record the change in belt tension of the tangential belt 3 regardless of the running direction of the tangential belt 3 . Thus, the belt tension of the tangential belt 3 is always reliably monitored by the load cell 15, regardless of whether the ring-spun cop is produced with an S-twist or a Z-twist.

The electrical signal S of the load cell 15 is first processed in a measured value amplifier 22 before being transferred via the signal line 21 to the machine control 13 of the ring spinning machine 1 . As can be seen, the machine control 13 has a display 23 on which the belt tension data of the tangential belt 3 recorded by the load cell 15 and processed in the machine control 13 are shown in FIGS. and visualized in a number of different ways, as described in more detail below based on FIG.

FIG. 3 shows, for example, a first possibility for visualizing the data on the display 23 of the machine control 13 . As can be seen, the display 23 shows an object used, inter alia, for monitoring the belt tension of the tangential belt 3 . In this case, for example, an image of the sensor device 12 is shown in the center of the display. Various digital displays 40-43 are shown on the left, for example for the set values of the tangential belt 3, while on the right are digital displays 44-47 for the limit values of the belt tension. Furthermore, a bar graph 24 is shown, which is divided into a plurality of different measuring ranges, namely in this example five vertically arranged measuring ranges 28-32, which measuring ranges are: It relates to the belt tension of the tangential belt 3.

The upper measuring range referenced 28 shows, for example, a belt tension value which is clearly too high, i.e. the belt tension value reaches this value, for example in order to avoid consequent damage. , the belt tension value is such that the machine control unit 13 turns off the ring spinning machine 1 immediately.

The measuring range, which is located below and is denoted by reference numeral 29, is the so-called warning range. The belt tension values specified in this measuring range 29 are also somewhat too high. The machine control unit 13 of the ring spinning frame 1 activates an alarm when the belt tension value reaches this measurement range 29 .

The middle measuring range 30 shows the correct belt tension value, ie the belt tension value that the tangential belt 3 should have during the spinning operation.

The measuring range 31 lying below this is again the warning range. The belt tension values given in measuring range 31 are somewhat too low. Therefore, the machine control unit 13 of the ring spinning frame 1 activates an alarm when the belt tension value falls within this measuring range 31 . The lower end of the bar graph 24 is a measurement that further indicates a clearly low belt tension value, i.e. a belt tension value at which proper operation of the ring spinning machine 1 is no longer possible in any case. Formed by area 32 . Therefore, the machine control section 13 immediately turns off the ring spinning machine 1 when the measuring range 32 is reached.

Furthermore, the current belt tension value of the tangential belt 3 is always displayed analogously by means of display elements, such as arrows 25 , which can be moved along the bar graph 24 .

The display 40 shown on the left side of the display shows in digital form the current belt tension value which is indicated analogously on the bar graph 24 according to the arrow 25 . The display 41 shows, based on a curve, how the belt tension has evolved over a given past period of time. The digital displays 42, 43 each show a preferred correction factor or display a predetermined calibration value.

The digital representations 44 to 47 shown in the area of the bar graph 24, as already mentioned above, show a plurality of different limit values of the belt tension of the tangential belt 3, i.e. the belt tension at which a given reaction of the machine control 13 occurs. indicate a value. 4 and 5 disclose further visualization possibilities of the display 23 of the machine control 13. FIG.

FIG. 4 shows a display 23 with a representation of a graph 33 on which the course of various belt tension values of the tangential belt 3 is shown over a given period of time during the spinning process.

As can be seen, the graph 33 has a horizontally positioned X-axis and a vertically positioned Y-axis. On the X-axis the time course of the spinning process is indicated in days, while on the vertical Y-axis the value of the belt tension of the tangential belt 3 is indicated in N, or The height of the ring rail of the ring spinning frame 1 is indicated in mm.

The curve 34 referenced 34 shows the course of the respective maximum belt tension value, while the curve 35 shows the course of the respective minimum belt tension value of the tangential belt 3 . Curve 36 correspondingly shows the course of the instantaneous average belt tension value of tangential belt 3 . Furthermore, curve 37 shows the course of the position of the ring rail of ring spinning machine 1 during the spinning process.

FIG. 5 shows the display 23 with the display of a graph 33 on which the evolution of the belt tension during the doffing process of the ring spinning frame 1 is shown. Again, the graph 33 has a horizontally positioned X-axis and a vertically positioned Y-axis. On the X-axis the time course of the doffing process is shown in minutes, while on the vertical Y-axis the belt tension value is shown in N. A curve 34 shows the transition of the belt tension value during the doffing process.

1 ring spinning frame 2 spindle 3 tangential belt 4 pressure roller 5 deflection roller 6 spindle drive 7 drive wheel 8 belt pulley 9 screw drive 10 adjusting drive 11 electric motor drive 12 sensor device 13 machine control 14 fixing device 15 load cell 16 holder 17 shaft 18 holding plate 19 spring element 20 control line 21 signal line 22 measured value amplifier 23 display 24 bar graph 25 arrow 27 belt tensioning device 28 measuring range 29 measuring range 30 measuring range 31 measuring range 32 measuring range 33 graph 34 Curve 35 Curve 36 Curve 37 Curve 38 Curve 40 Digital display 41 Display 42 Digital display 43 Digital display 44 Digital display 45 Digital display 46 Digital display 47 Digital display S Electric signal

Claims (7)

A method for monitoring the belt tension of a drive belt of a ring spinning machine (1), comprising:
The ring spinning machine (1) has a plurality of spinning units, and the spindles (2) of the spinning units are frictionally driven by a circulating tangential belt (3) during the spinning operation.
in the method
monitoring the belt tension of the tangential belt (3) by a sensor device (12) connected to the machine control (13) of the ring spinning machine (1);
belt tension data sensed by said sensor device (12) are processed in said machine control (13) and visualized via a display (23) ;
The machine control unit (13) records the belt tension data of the tangential belt (3) during both the spinning operation and the doffing process of the ring spinning machine (1),
During the spinning operation of the ring spinning machine (1), the maximum belt tension value, the minimum belt tension value and the average belt tension value of the tangential belt (3) and the ring spinning machine ( Displaying the position of the ring rail of 1) on the display (23),
A method characterized by: said machine control (13) initiates a reaction when it determines that said belt tension data of said tangential belt (3) is about to reach a settable minimum value or a settable maximum value;
The method of claim 1. said machine control (13) causes an alarm perceivable to an operator to be activated;
3. The method of claim 2. the machine control (13) causes the ring spinning machine (1) to be turned off;
3. The method of claim 2. An apparatus for carrying out the method of claim 1, comprising:
A sensor device (12) for monitoring belt tension of a tangential belt (3) of the ring spinning machine (1) is connected to a machine control unit (13) of the ring spinning machine (1),
Said machine control (13) processes the sensed belt tension data to produce maximum, minimum and average belt tension values for said tangential belt (3) over a predetermined period of time during the spinning process. , a display (23) capable of visualizing the position of the ring rail of the ring spinning machine (1) ,
A device characterized by: said sensor device (12) comprises a movably supported deflection roller (5) corresponding to a load cell (15);
6. Apparatus according to claim 5 . A measurement amplifier (22) is connected to said load cell (15), said measurement amplifier (22) being connected to said machine control (13) of said ring spinning machine (1),
7. Apparatus according to claim 6 .

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