CS194391A3 - Ring spinning (or twisting) machine operation. - Google Patents

Description

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Method of Operation of the Annular Spinning "0 XJ <> ° o <op &amp; TO 7; --λ - a ► * - r-> X m> -aw - ^ 2 '?. f *

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a method for actuating annular and spinning or spinning, wherein the spinning or spinning units provided in the frame and connected to the pononer are each provided with at least one thread guide with a spinning band provided on the annular bench and with at least a spindle for a spinning ring running along the spindle and a spindle speed program according to the condition of the yarn guide running through a predetermined speed program.

The invention also relates to a device for carrying out the above-mentioned method.

The method and apparatus of the aforementioned kind serve to manufacture the yarns, and at the same time it is also possible to optimize the entrainment of the ring and the runner. prior art

The running of the spin rings usually lasts for one month, and a lifetime of several years can be expected with careful running. Running runners are shorter and the life span is about two to three weeks shorter, resulting in more frequent replacement of runners.

However, the running-in must occur at a relatively low rotational speed, which in turn reduces the machine's anti-reactivity and is therefore undesirable.

The running itself must be done carefully, as otherwise the lifetime of the runners and rings will be shortened.

There are regulations in the form of programs for spindle revolutions that need to be worked on in running. 2

Such spindle speed programs have the disadvantage of being built on more or less accurate experience values that rely on the observation of runner failure. In doing so, the spindle speed must be maintained at the lower limit of the test spectrum to minimize the risk of premature ring or runner leakage. Furthermore, the run-in cannot be interrupted even with a favorable course, since the condition of the metalized surfaces of the rings and runners can only be determined by metallurgical examination, i.e. not in the operation of the annular spinning machine.

Overall, it can be concluded that using lzesice running programs to achieve a satisfactory run, however, cannot be achieved by the productiveness of a possible run. Accordingly, the invention is based on the task of removing tyton and creating a run-in process as well as a run-in method so as to use the maximum spindle speed possible according to the actual operating condition of the rings and / or runners.

SUMMARY OF THE INVENTION

This object is achieved according to the invention by capturing the condition of the fiber conductors during the spinning operation by continuously detecting their operating temperatures and evaluating the constant adaptation of the speed program in terms of the maximum possible spindle speed.

The apparatus for carrying out the method of the invention comprises at least one detection unit for detecting operating temperatures as well as a device for processing temperature signals generated by the detection unit to a speed control signal for the spindle operation. 3

Industrial usability

According to the method of the invention, the operating state of the ring / runner pairs is captured over the operating temperature; in the unfavorable course of running, the wear mechanism changes so that damage occurs in the short term. This change in consumption is now reflected in increased operating temperature. This increased operating temperature means that the maximum possible revolutions have been exceeded. When the speed is then reduced, irreparable damage can be avoided. The maximum possible spindle speed can now be found from the speed program by increasing the speed gradually to the counterweight of the permissible material load and then decreasing it somewhat immediately after the edge is read.

By repeatedly repeating it during the various stages of the program, the program will adapt to the maximum spindle speed based on the current state of the twin / runner.

The method according to the invention further allows the speed of the twisted ring / runner pairs to be optimized. As in the running-in process, the runner may have a runner for a generally used rotary spindle; where this limit is exceeded, it will again manifest itself in an excessively elevated operating temperature.

Where the tension of the yarn between the draw-in device and the overloading device is excessive, this in turn increases the frictional performance between the ring and the runner, which in turn increases at elevated operating temperature. Thus, the method of the invention further enables the highest speed of the spindle to be detected in operation of the spinning machine with respect to the thread tension. With this, the invention still has the task of ensuring that the maximum permissible yarn tension is obtained during operation of the spinning machine and is therefore not exceeded. 4

The device according to the invention allows to detect operating temperatures and thus to process the control signal for the spindle shaft drive speed.

The process of the invention can also be used to detect individual damaged rings or runners. The elevated temperature spinning sites can be shown and trained, and at a constantly elevated temperature at one spinning point, a reference to severe damage - a proper ring.

Further advantages of the invention will become apparent from the following description of embodiments in conjunction with the drawings.

FIG. 1 is a schematic cross-sectional view of a spinning unit with a yarn guide, a sweep and a temperature measuring device.

FIG. 2 is a representation of the signal values of the measuring device of FIG. 1 when passing through the spinning stations in the vehicle.

FIG. 3 shows a schematic view of the runner's temperature as a result of an accidental machine run failure.

FIG. 4 shows schematically an annular bench with a measuring device according to FIG. 1, and a block diagram of a device for processing a measured signal to a control signal for the spindle drive also shown.

Oor. 5 shows schematically the sequence of temperature of the annular conductors of the annular bench in a graphical representation.

FIG. 1 shows schematically in section a spinning unit 1 of an annular spinning rack or a twisting machine. An annular bench 2 is shown with a threaded conductor consisting of a laundry ring 4 and a runner 5 running therethrough and a spinning or skating thread 5. Next, the turn 5 deployed on the spindle shaft 3 is shown. In order to simplify the illustration, the bearing and connection region 9 of the spindle drive 8 is shown only in dashed lines. Further, in the measuring position M in front of the runway, a measuring device 11 is provided in FIG. 1, arranged on a conveyor platform 10, the irradiation device 11 has an infrared lens 12, an infrared semiconductor sensor 13 and a preamplifier 14 and is connected to a signal transmission line 15 for measuring the signal normally generated by the sensor 13.

The position sensor 16 for detecting the measuring position of the measuring device 11 is connected to the signal line 17 for transmitting the position signals.

FIG. 2 shows schematically in graphical representation the course of signal values transmitted via signal lines 15 and 17. As the horizontal axis as the position axis, the measuring positions lie in the direction of the measuring device 11 as it passes along the annular bench 2 (FIG. 4). The temperatures detected by the infrared sensor 13 or the pulses emitted by the position sensor 16 are measured continuously by passing the measuring device 11. The temperature signal at the moment of the pulse is decisive. The curve 13 shows the temperature curve registered by the measuring device 11, while the pulses 19, 19 ', 19 "... indicate the measuring poles in front of the respective spinning device 11, 1', 1" .....

FIG. 3 shows schematically in a graphical view the temperature curve 20 of the runner 5 in the course of a malfunction of the progress of the process, such as occurs when the lubrication of the intermediate flange ring 4 and the thread runner 5 is broken, but then resumes itself. Time axis is applied time, operating temperature on vertical axis

FIG. 4 shows a schematic view of the annular beam 2 with the spinning points 2, 1, 1, etc. The measuring device 11 is in front of the spinning station 1 in a measuring pole M1 for measuring the temperature of the runner 5. Furthermore, it is in the form of The diagram 21 shows a device 21 which serves to process the temperature and position signals supplied via the signal lines 15 and 17 to a control signal for the spindle shaft drive 22.

For this purpose, the device 21 comprises a measurement and storage connection 23, an analogue-to-digital converter 24 and a stacker, or a measured value memory 25, 25, which are connected to each other via data lines 26, 27 and 22. A reference counter 30 is provided for the signal, which is provided with memories 29, 29 and 29 ", and is operatively connected via the data line 31 to the measured value shaker 25 and the spindle drive 22 and the control line 32.

FIG. 5 shows in graphical form the temperature sequence of the detected operating temperatures. Measurement positions Ί Ί 1, M1, M1 ", etc., and the vertical axis of the respective measured value are applied to the horizontal axis. The temperature interval (2) of the evaluation of the individual measured values is indicated by a dashed line.

If the annular spinning machine or skip machine is now put into operation, the setpoint counter 30 from the memory 22, 29 or 29 "takes the specified spindle speed program and orders the spindle drive 22 according to the program.

In order to capture the actual condition of the ring / runner, the measuring unit 11 guides over its surface 10 along the individual measuring positions M (FIG. 4), continuously generating temperature signals corresponding to the measured temperature and transmitting them via signal line 15 (FIG. 2). For this purpose, the platform 22 advances along the annular bench, which shares its lifting movements. The operating robot for moving the platform 10 in the manner described is known as R030FIL. Ί

The position sensor 16 transmits the positional signal via the signaling device 17, the measuring device 11 being in the measuring position M, which allows the measuring and storage circuit 23 to recognize the metered signal as a signal of the operating temperature of the particular location and to store the measured 25 via the analog-to-digital converter. values for creating a temperature sequence S from the measured values of all measured operating temperatures. In the setpoint counter 30, the average temperature T0, which is assigned to the temperature interval I of the predetermined width, is now determined from the temperature frequency S. The interval I can also be determined by statistically evaluating the measured temperature values. Interval I serves to include measured values affected by measurement inaccuracies or other insignificant deviations as self-confident, while the measured values outside the interval I are considered to be different. For example, the interval I can be 3 to 5 degrees longitudinally symmetrically to the co-ordinate of the average temperature T0, as shown in Figure 5. The operating temperatures above the interval are those temperatures that are greater than the average temperature TD, the increase by half the width of the interval L ·

The temperature values above the interval I are either of a transient nature (Fig. 3), or indicate operating conditions that lead to runner failure. It has now been shown that, according to the type of machine, for example, 5¾ failures in the spinning points of the transient. In other machines, half of the measured spinning points are faults that again disappear by themselves. Thus, if less than 1% of the measured temperatures do not exceed the range I, the respective speed is included in the spindle and non-hazardous, whereupon the setpoint counter increases the speeds to be used according to the program by a predetermined value and outputs a corresponding signal to the spindle drive 22 via the data line 30. If more than 1 h of measured temperatures lie above 8 J1, the setpoint counter decreases the set speed to a preset value to achieve a safe speed range again. The percentage at which the speed increase is allowed is denoted P1. For example, it can reach a maximum value of I%. The percentage that requires a speed reduction is denoted _P. The minimum _P value can be assumed to be 1? % x 5 * 9 ·

A re-increase of the spindle speed occurs either on the basis of the speed program or on the basis of a time course. In the first case, the program itself sets a higher speed; in the second case, the setpoint counter 23 automatically re-detects the current condition of the ring / runner with a follow-up correction turn. This implies that the program is adapted to the maximum possible spindle speed based on the actual state of the reel / runner, which allows the productivity of the spinning or skewing machine to be maximally attained at the same time, and at the same time avoiding the subsequent run-in damage with a corresponding production loss. Instead of ascertaining the operating temperature via the temperature of the runner as previously described, it is also possible to measure the temperature of the rings 14 by the described measuring device. It can be shown as the difference in temperature between, for example, the ring 4 and the annular bench 2. In the exemplary embodiment, not shown in the drawings, the operating temperature is not detected by measuring the infrared values, but by the contact measurement on the ring. For example, the temperature can be measured by touch thermocouples. Experiments have shown that the spinning ring changes its temperature proportionally to the operating temperature. Changing the temperature of the flange indicates a change in the operating temperature. Accordingly, the detector units formed as a thermocouple are arranged on the rings and connected to operation via a signaling device with the punch 25 of the measured values at the temperature signal processing device 21. As a result, the infrared measuring device L1 and the respective conveying device are dispensed with, it being advantageous to be able to recall at any time as a full temperature sequence S without a time delay, since each measured radial ring is provided with a thermocouple.

He represents: JUDr.Zdaňka ^ RE; ^^^ advukátka

Claims (12)

- 10 - PATENT CLAIMS A method of operating an annular spinning or twisting machine in which the spinning or bouncing units provided in the frame and connected to the drive are provided with at least one thread guide with a spinning ring arranged on the annular bench and with at least one a runner on a running spindle and a spindle for a spinning ring, and wherein a predetermined speed program for the spindle speed and the yarn guide condition occurs, characterized in that the condition of the fiber guides (3) during the spinning operation is detected by continuously detecting their operating temperatures and shifts it is not felt to constantly adjust the speed program in the sense of maximum possible spindle speed. Method according to claim 1, characterized in that the detection of the operating temperatures is carried out by contact measurement of the temperatures of the annular rings (4). 3. A method according to claim 1, wherein the detection of operating temperatures is carried out by contactless measurement of the temperature of the runners (5) and / or the rings (4). Method according to one of claims 2 or 3, characterized in that the runners (5) or rings (4) to be measured are repeatedly scanned one after the other by at least one detection unit for forming temperature sequences (S) and adapting The speed program is always performed on the basis of one or several temperature sequences (S). Method according to one of Claims 1 to 4, characterized in that an average temperature (TD) which is assigned a temperature interval (I) of a predetermined width is formed from the temperature sequence temperatures (S), and that the current speed setpoint from the speed program is set to s- and &amp; o <c- duty specified here> < If the percentage (P1) of the measured temperatures is above the average temperature (TO), increased by half the interval (I), the percentage (P1) being, for example, 1% and the interval being 3-5 °. Method according to claims 1 and 5, characterized in that the speed setpoint is reduced when at least one percent of the measured temperatures (D) is above the average temperature (TD), increased by half the interval (I), with the percent ratio (P) of ) is, for example, a factor of 1.2 greater than the maximum percentage (P1). 7. Apparatus for carrying out the method according to any one of claims 1 to 6, characterized in that it comprises at least one detection unit for detecting operating temperatures, as well as a device (21) for processing temperature signals formed by the detection unit, to a control signal spindle speed (22). claim 8. An apparatus according to claim 7, wherein the detection unit for detecting the operating temperature measuring device (11) for infrared radiation. claim 9. Device by. 8, characterized in that the infrared measuring device has a transport platform (10) slidable along the annular bench (2) so that it passes the measuring points at the same distance independently of the stroke ring benches (2). Device according to claim 7, characterized in that position sensors (16) are provided at the spinning stations (1, 1 ', 1 "...) which are operatively connected to the position of the measuring device (11). device (21). Apparatus according to claim 7, characterized in that detection units formed as thermocouples are provided on the spinning rings (4) and are operably connected 12 with a temperature signaling apparatus (21). Apparatus according to any one of claims 7 to 10, characterized in that the apparatus (21) comprises a connection (24) for the analogue-to-digital conversion of temperature signals, furthermore memory (25, 25). for storing temperature and position signals in memory, as well as a setpoint counter (30) provided with memories (29, 29, 29 ") for generating a speed control signal.