JP4198681B2 - Method for operating a loom and an opening machine with separate drives - Google Patents

Abstract

For the operation of a loom with a number of drives, with electromotors for the main and shed drives, a control sets their working by transmitted signals. From start-up, the loom is operated initially at a speed slower than the normal working speed, and the shed unit is accelerated to its working speed. The loom speed is raised to the working level when its has reached a given position, rotary speed or torque value. When the loom is stopped, the main drive is braked and slows down to the given conditions and brought to rest, while the shed drive is braked to give a slower deceleration. The shed unit is an electronic dobby, an eccentric machine or a Jacquard.

Description

  The invention relates to a loom and a method of operating an opening machine based on the features of the front part (preamble) of claim 1.

  For the opening machine, the starting of the opening machine is preceded by a predetermined time or a predetermined time range compared to the starting of the loom and the opening machine is stopped after a suitable time compared to the loom in the stop phase. It is already known from DE 10053079C1 to specify a slowing of the opening machine more slowly than that of the loom by specifying a certain time value or time difference. This method is particularly suitable for opening machines where the opening means, for example a heald frame or lifter, is not forced to be interlocked with the movement of the drive, but the movement of the opening means is specified according to the handle. This relates to electronic dobby machines and jacquard machines, for example. The disadvantage of the method introduced in DE 10053079C1 is that the loom starts “rapidly” at some point. In this method, the opening machine and the loom are started asynchronously, but this starting phase is a sensitive area because the two machines must operate synchronously at some technical (time) point. For example, a failure may occur in the loom drive, which becomes apparent only at the start command or the physical start of the start process. Also, information on countermeasures (preliminary test run; measurement) and the state of the loom, in particular its temperature rise, cannot be easily obtained. However, the above-mentioned condition has a great influence on the machine operation or power consumption at the start-up. Moreover, the scope of the “flexible” start-up activity that the present invention provides based on document DE 10053079C1 for an opening machine (for example a so-called tappet machine) in which the opening means is forcibly linked with the movement of the drive device is Occasionally, if the movement of the opening means is carried out without retraction over several revolutions. This movement must be avoided since it causes damage to the warp, for example warp of the warp.

  The object of the present invention is to make the required current or power as small and / or equal as possible with high control technology and operational safety when the loom and the opening machine drive are separate. The start and stop process is configured.

  This problem is solved by operating the loom at a predetermined rotational speed corresponding to a slow motion from the start time and starting the slow motion simultaneously with or before the opening machine according to the present invention. .

  If the slow motion is physically initiated, on the one hand, it is possible to assume a fault-free function of the drive system with a high probability already during the subsequent “rapid” acceleration. On the other hand, the drive train obtains testimony about the condition of the loom, in particular the degree of temperature rise, especially via the required torque for loom movement. This testimony can be used for subsequent “rapid” acceleration designs and synchronization with the opening machine, for example by adjusting control parameters. Also, at the stage of the loom's slow motion and the opening machine rising, the loom controller analyzes the two movements against each other, especially for the subsequent “rapid” acceleration of the loom and synchronization with the opening machine. It is possible to adjust the operation sequence as well as possible. In a special embodiment of the invention, at the time of the first weaving of the loom performed at the work speed required for operation, the opening machine has a speed different from the work speed required for operation. The machine starts up. If this speed is less than the required working speed, the required acceleration of the opening machine is also reduced-for example when starting the opening machine, such as when there is a risk of warping in the tappet machine described above. Although it is not allowed for reasons of weaving technology to arbitrarily precede the start of the loom. In another special embodiment of the invention, when a stop is required, the opening machine braking process is started at the working speed required for operation already before the last beat-off in connection with the loom stop. The While it is not permitted for reasons of weaving technology to arbitrarily delay the timing of the opening machine to stop or the rotational angle position from reaching the stop of the loom, the time and rotational angle range available for the braking process is thus not allowed. Extended. Thus, the vehicle can be decelerated with a smaller torque. However, it should be noted that this stop method only produces significant results when used in a specific filling method.

  Next, the present invention will be described in detail based on embodiments.

FIG. 1 shows the transition of the rotational speed of the loom (Webmaschine) and the opening machine (Fachbildemaschine) from the same start time t ₁ = t ₂ , the opening machine has a constant acceleration n_fbm, and the loom is t ₃ is accelerated after regular rotational speed N_wm. That is, the loom moves at a slow speed until time t ₃ , and then starts “suddenly” at t ₃ . Time t ₄ is the time when both the loom and the opening machine have reached the work rotational speed necessary for operation.

In FIG. 2, unlike FIG. 1, the start time t _{2 of the} loom is before the start time t _{1 of the} opening machine. Other operation operations of the opening machine and the loom are the same as those shown in FIG.

FIG. 3 shows that the predetermined rotational speed of the loom increases continuously and gradually shifts to a higher acceleration from time t ₃ to the normal rotational speed. In this case, the opening machine and the loom are started at time t ₁ ; t ₁ = t ₂ .
FIG. 4 shows the change in the rotational speed for stopping the loom and the opening machine in the form opposite to that in FIG. The last of the beat-is carried out in time t _8. The loom performs the last beat at the required work speed n_wm before the start of the stopping process. Time t ₉ is the time when the loom and the opening machine stop process starts. Braking process of the loom is completed in time t _10. The loom is then operated at a slow speed until time t ₁₁ , while the opening machine is decelerated from the normal speed until reaching a stop at t ₁₂ .

FIG. 5 shows changes in the rotational speed for stopping the loom and the opening machine in the form opposite to that in FIG. In this case, the opening machine is stopped at a time t _12. This time is prior to the time t ₁₁ to stop the loom.

FIG. 6 shows the change in rotation speed at which the large acceleration n_wm of the loom intersects with the acceleration curve n_fbm of the opening machine before reaching the normal rotation speed of the loom prior to the first beat at the time t ₅ . The rotation speed decreases due to the _tapping of the region from t _5a to t _5b , and then increases again to the normal rotation speed. Times t ₁ and t ₂ are at one point. That is, at this point, the loom and the opening machine are started simultaneously. The loom performs a slow motion until time t ₃ , while the opening machine is accelerated to the normal rotational speed. At time t ₅ , the loom performs the first beating at the operation speed necessary for operation. At times t _5a and t _5b , the area before and after the strike is displayed. In that case, t ₅ is a time when the weaving machine to perform the first of the beat-at regular speed. loom reaches the working rotational speed required on operation at t _6. T ₆ coincides with t _5a diagrammatically. t _5a . . . Since the rotational speed must be constant in the range of t _5b , t ₆ is preferably before t _5a or at the same time. Time t ₇ is a second beat-up time that the loom performs at the work rotational speed necessary for operation. Times t _7a and t _7b display areas before and after the second _tapping time t ₇ . Timing the opening machine reaches the working rotational speed required on operation is a timing t _13.

By appropriately changing the loom speed between times t _5b and t _7a , the required synchronized operation of the loom and the opening machine is ensured. This synchronization is given after time t _7a . FIG. 7 corresponds to FIG. 6 and shows the stop process of the weaving machine and the opening machine after beating where the deceleration curves intersect. Time t ₈ is the timing of the last reed beating of the loom is carried out in operation on the work rotational speed required before the start of the process of stopping. Times t _8a and t _8b display a predetermined range before and after the strike. This is the last beat that the loom will perform at the operational speed required for operation before the stopping process. Opening the machine starts to stop the process in time t _14. Loom to start the process of stopping the time t _15. In the diagram, t ₁₅ and t _8b coincide. t _8a . . . Since the rotational speed must be constant in the range of t _8b , the time t ₁₅ is preferably behind the time t _8a or at the same time. The “rapid” braking operation of the loom ends at time t ₁₀ . From this time, the low-speed movement of the loom continues until time t ₁₁ , at which time the loom stop process ends. Time t ₁₁ is consistent with the timing t ₁₂ to the opening machine down process is completed. Thus, the opening machine and the loom stop.

An example of the rise characteristic of a rotation speed is shown. Another example of the speed rise characteristic in which the loom is started before the opening machine is shown (t ₂ is before t ₁ ). Another example of the rotational speed rise characteristic in which the transition from the low speed to the high acceleration of the loom is performed slowly will be shown. An example of the rotation speed stop characteristic similar to FIG. 1 is shown. An example of the rotation speed stop characteristic similar to FIG. 2 is shown (t ₁₂ is before t ₁₁ ). An example of the rotational speed rising characteristic in which the first beat is not yet synchronized is shown. An example of the stop characteristic in which the stop of the loom is started after the stop of the opening machine is shown.

Claims (7)

The loom is equipped with an electric main drive device, the opening machine is equipped with an electric sub drive device, and the control device controls the electric main drive device and the electric sub drive device based on signal transmission. In the operating method of the loom and the opening machine in which the loom and the opening machine are stopped by the braking means when the failure occurs, the loom is first rotated from the start timing (t ₂ ) to the predetermined speed. While the opening machine is accelerated in the direction of the normal rotational speed (n_fbm) from the start time (t ₁ ) with an acceleration that depends only on the drive itself, and then the loom is in the predetermined position, rotational speed or torque When the value or time (t ₃ ) is reached, the loom is started from the predetermined rotation speed to the normal rotation speed (n_wm) and at the first beat-up time (t ₅ ) of the loom performed at this normal rotation speed. Opening machine operates Has a rotational speed of regular rotation speed different required, and is braked in rotation speed loom predetermined just opposite a stopping process to stop at a predetermined time (t _11), whereas, the opening machine of the loom A method characterized in that the vehicle is slowly decelerated compared to a braking process. The method of claim 1, wherein the start timing of the opening machine (t ₁₎ is simultaneous with the start-up period of the loom (t _2). The method of claim 1 in which the starting timing of the opening machine (t ₁₎ is characterized in that after the start-up period of the loom (t _2). The method according to claim 1, wherein the stop time (t ₁₂ ) of the opening machine is before the stop time (t ₁₁ ) of the loom. The method according to claim 1, wherein the stop time (t ₁₂ ) of the opening machine is coincident with the stop time (t ₁₁ ) of the loom.   As long as the opening machine does not take the normal rotation speed required for operation (n_fbm), the loom is operated at a rotation speed that is not the normal rotation speed required for operation within a predetermined angle range before and after the hammering operation. 2. The method according to claim 1, wherein the required synchronous operation is obtained between the loom and the opening machine. Opening machine dobby, the drive device for the implementation of the method according to any one of claims 1 to 6, characterized in that a tappet device or jacquard machine.

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