EP3507405A1 - Verfahren und vorrichtung zur veränderung des dynamischen verhaltens eines streichbalkens einer webmaschine - Google Patents
Verfahren und vorrichtung zur veränderung des dynamischen verhaltens eines streichbalkens einer webmaschineInfo
- Publication number
- EP3507405A1 EP3507405A1 EP17755454.0A EP17755454A EP3507405A1 EP 3507405 A1 EP3507405 A1 EP 3507405A1 EP 17755454 A EP17755454 A EP 17755454A EP 3507405 A1 EP3507405 A1 EP 3507405A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- deflecting element
- weaving machine
- deflecting
- forces
- warp threads
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D49/00—Details or constructional features not specially adapted for looms of a particular type
- D03D49/04—Control of the tension in warp or cloth
- D03D49/12—Controlling warp tension by means other than let-off mechanisms
Definitions
- the present invention relates to a method for changing the dynamic behavior of a spreading bar of a weaving machine and to a weaving machine with a bar, which is adapted to the execution of such a method.
- WO 2012031802 A2 describes a coating tree for guiding warp threads with a deflection element, which is supported on the loom via an elastic element. Again, the task is described to provide the lowest possible inertial masses on Fadenumlenkelement to keep the warp thread load low.
- DE 1 138 715 A discloses a coating bar which is rotatably mounted in clamping levers which are pivotable about a fixed axis on the machine frame and under the action of a force accumulator for pressing the clamping bar to the Warp threads are.
- at least one of the screed bearings located in the clamping levers has a braking device for simultaneously damping the vibrations in the self-rotation and in the swiveling movement of the screed bar. In this way, the dynamic behavior of the
- the warp tension in the other phases of the weaving process should not be unnecessarily high, as explained in detail in the prior art. This is especially true for the phase of the change of subject, which is between two
- Leaf stops done. Depending on the pattern of the fabric is doing a change of all or more warp threads from the upper compartment in the lower compartment and vice versa. In this case change the warp threads are geometrically deflected from their straight course by the weaving machine. This deflection is accomplished by shifting the warp threads vertically up or down by healds. The warp threads in the strands are subjected to friction. It is advantageous to avoid thread breakages, if there are the lowest possible warp tension in this subject change. It thus turns out that it would be advantageous to produce higher warp thread tensions for certain fabrics, at least during the sheet stop, for a short time, while it makes sense for other fabrics to work with low warp yarn tensions even in the case of sheet folding.
- the object is achieved by a method and a loom according to the independent claims.
- the method for changing the dynamic behavior of a carding bar of a weaving machine relates to a bar with at least one
- the deflecting element may for example consist of a continuous bent sheet, the
- the warp threads are usually performed starting from the warp beam on the deflection of the spreading bar to the elements of the shedding of the loom.
- deflecting element instead of a single deflecting element, several deflecting elements distributed over the width of the weaving machine are possible - for example a plurality of sheet metal elements adapted to the fabric width.
- the deflecting element is connected via one or more spring elements with a
- Machine frame of the loom connected in such a way that when applying forces that cause acceleration or movement of the deflecting element relative to the machine frame, inertial forces and spring forces on the deflecting effect.
- Acceleration forces are exerted by the warp threads on the deflection during operation of the loom.
- the inertial forces are primarily the forces that occur as a result of the acceleration of the inertial mass of the deflecting element.
- To this inertial mass may also include other components which are attached to the deflecting element or connected thereto in such a way that they are in one movement or
- the spring forces caused by a deflection of the deflecting element with the associated spring element from a rest position in a deflected position usually already takes place through the warp threads, which are guided under tension over the deflection element.
- spring elements for example, leaf springs are used, which are supported at one end on the machine frame of the loom and carry the deflecting at its other end. It is also conceivable, however, an arrangement in which the deflecting movable on
- Machine frame supports for example, in a joint, with an additional one
- Spring element between deflecting element and machine frame is arranged such that at a deflection of the deflecting element one end of the spring is deflected.
- springs leaf springs, torsion spring, coil springs or air springs come into question.
- the invention is characterized in that the effective at an acceleration of the deflecting inertial mass is changed in order to adapt the dynamic behavior of the spreading bar to changing weaving conditions. This is done in such a way that parts of the deflecting element or other components which are connected to the deflecting, exchanged, removed or supplemented.
- the inert mass acting on the deflecting element is increased when the loom is switched from a fabric having a lower weft density to a fabric having a higher weft density.
- the increased inertial mass causes a greater resistance of the
- Shot density is switched to a tissue with lower weft density.
- the reduced inertial mass causes a lower resistance of the
- Warp threads occur. Differences in the dynamic behavior of the stripe bar arise even with slight differences in the effective effective at the deflecting inertial mass. However, it is advantageous if the effective inertial mass is increased or decreased by a factor which is between 1, 5 and 8, preferably by factors between 2 and 5 - for example 2.5 or 3 or 4. With an assortment of different additional masses in a corresponding gradation is the dynamic behavior to a variety of requirements such as weft densities or
- Another aspect of the invention relates to a loom with a
- Brushing bar with at least one deflecting element for deflecting warp threads.
- the deflecting element is connected via one or more spring elements with the
- Weaving machine is connected in such a way that when applying forces and movements on the warp threads inertial forces and spring forces on the
- the inertial forces are primarily the forces that occur as a result of the acceleration of the inertial mass of the deflecting element. To this inertial mass may also include other components that are attached to the deflection.
- the spring forces caused by a deflection of the deflecting element with the associated spring element from a rest position in a deflected position usually already takes place through the warp threads, which are guided under tension over the deflection element.
- spring elements for example, leaf springs are used, which are supported at one end on the machine frame of the loom and carry the deflecting at its other end. It is also conceivable, however, an arrangement in which the deflecting movable on
- Machine frame supported, for example, in a joint, wherein additionally a spring element between deflecting element and machine frame is arranged such that at a deflection of the deflecting element and the one end of the spring is deflected.
- springs leaf springs, torsion springs, coil springs or air springs come into question.
- the deflecting element is designed as a bent sheet metal.
- a very low-mass deflection element can be realized, which can quickly follow changes in the warp tension without causing larger increases in the warp tension.
- a particularly advantageous embodiment of the weaving machine according to the invention results from the use of at least one additional mass, which is connected to the deflecting element only frictionally via a clamping connection.
- This variant allows easier installation. There are no screws removed, but only a clamp to be solved.
- various forms of additional masses are conceivable, for example rods or elements made of flat material, which are distributed over the width of the weaving machine attached to the deflecting element.
- the cheapest, however, is the use of tubes as additional mass or pipes as deflection. It can pipes with different diameters and / or different Wall thicknesses are provided.
- Tubes can be - rotatably or fixedly mounted - use as a deflecting element or via a detachable connection - for example, a clamp - with a deflecting element, which is designed for example as a bent sheet metal.
- Several pipes can also be inserted into each other and thus combined to save space in the manner of a modular system.
- Figure 1 is a sectional view of an embodiment of the invention
- Figure 2 is a diagram of the warp tension and the movement of the
- Figure 1 shows an embodiment of the weaving machine according to the invention in a sectional view looking in the weft direction on the rear part of the
- warp threads 1 are guided around a deflection element 2 and from there - via a device for monitoring the warp threads 3 - fed to the front part of the weaving machine and the elements for the shedding and the sheet stop.
- the deflecting element 2 is designed in the present example as a bent sheet metal. It is presently screwed to a support member 4 in the form of a bent plate, which is at one end with an air bladder 5 in conjunction, while the other end at a hinge point in the machine frame of
- Weaving machine 6 is supported.
- the air bellows 5 here forms a spring element, via which the deflecting element 2 is connected to the loom such that when applying forces on the warp threads 1 on the deflection element 2 spring forces on the deflection element. 2 be effective.
- the support member 4 may be formed as a leaf spring whose lower end in the frame of the loom 6 is not articulated, but firmly clamped. In order to be able to monitor the operations on the coating bar during operation of the weaving machine, it makes sense to attach a sensor, for example an inductive displacement sensor, to the deflection element 2 itself or to the support element 4 or between the spring 5 and the machine frame 6.
- a sensor for example an inductive displacement sensor
- the support element 4 and the deflecting element 2 are connected to one another via a screw connection 7 such that between the deflecting element 2 and the supporting element 4 a tubular additional mass 8 can be clamped.
- additional mass 8 e.g. Bars made of solid material or elements with rectangular cross-section.
- This additional mass 8 is moved during movements of the deflecting element 2 and therefore causes the action of acceleration forces on the
- Such accelerations are generated during operation of the loom by forces acting on the warp 1 on the deflecting element 2. These forces and the consequent movements of the deflecting element 2 are caused in the warp threads 1 by the tray changing operations and the sheet stop of the loom.
- FIG. 2 shows various time-dependent courses of measured values during operation of a weaving machine.
- the solid line shows the course of the warp tension 10 and the warp tension 10 (cN per thread) over a period of several
- Machine frame 6 shown.
- the recorded course 12 corresponds to the path of the deflecting element 2 in the region of the thread support of the warp threads 1; in Figure 1, this movement is shown by a double arrow 12.
- Movement of the deflecting element 12 qualitatively has a different course than the course of the warp tension 10. Due to the inertial mass is the
- Deflection element 2 is not set in motion as quickly as would be required to compensate for the very rapid increase of the warp tension 10 at the sheet stop. The result is the tension peak of the warp tension 10.2 shown in FIG. 2, which is undesirable in many cases, but which is absolutely necessary for some fabrics with high weft density in order to achieve the desired
- the inertial forces which are opposed to a rapid movement of the deflecting element 2, can be increased or reduced according to the invention by exchanging, removing or supplementing additional masses 8.
- additional masses 8 In addition to the desired shot density while the speed of the loom, i. to consider the time for a weaving cycle. At higher speeds - so very short
- additional masses 8 can be removed or exchanged for those of lesser mass. It has been shown that an assortment of additional masses 8 is sufficient for most cases, if thus gradually mass increases or
- Warp tension or warp tension Extreme values in the course of warp tension
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016216610.7A DE102016216610B3 (de) | 2016-09-02 | 2016-09-02 | Verfahren und Vorrichtung zur Veränderung des dynamischen Verhaltens eines Streichbalkens einer Webmaschine |
PCT/EP2017/070337 WO2018041592A1 (de) | 2016-09-02 | 2017-08-10 | Verfahren und vorrichtung zur veränderung des dynamischen verhaltens eines streichbalkens einer webmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3507405A1 true EP3507405A1 (de) | 2019-07-10 |
EP3507405B1 EP3507405B1 (de) | 2020-06-17 |
Family
ID=59686925
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17755454.0A Active EP3507405B1 (de) | 2016-09-02 | 2017-08-10 | Verfahren und vorrichtung zur veränderung des dynamischen verhaltens eines streichbalkens einer webmaschine |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP3507405B1 (de) |
JP (1) | JP2019529730A (de) |
CN (1) | CN109642363B (de) |
DE (1) | DE102016216610B3 (de) |
TW (1) | TW201812129A (de) |
WO (1) | WO2018041592A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018212847B3 (de) | 2018-08-01 | 2019-10-10 | Lindauer Dornier Gesellschaft Mit Beschränkter Haftung | Vorrichtung zum Einstellen der Kettspannung von Kettfäden |
DE102018212932B3 (de) | 2018-08-02 | 2019-06-13 | Lindauer Dornier Gesellschaft Mit Beschränkter Haftung | Vorrichtung zum Führen von Kettfäden in einer Webmaschine |
DE102018218294B3 (de) * | 2018-10-25 | 2020-03-05 | Lindauer Dornier Gesellschaft Mit Beschränkter Haftung | Vorrichtung zur Messung der Kettspannung in einer Webmaschine sowie Webmaschine |
CN111793881B (zh) * | 2020-06-29 | 2021-12-21 | 苏州优众纳米科技有限公司 | 一种纺织机用进线夹持装置 |
WO2023233427A1 (en) * | 2022-06-02 | 2023-12-07 | KURKUTE Sanjay anant | System for imparting momentary rigidity in tension sensing mechanism of weaving machines and method therefor |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1138715B (de) * | 1956-04-13 | 1962-10-25 | Sulzer Ag | Webmaschine |
BE792485A (fr) * | 1971-12-10 | 1973-06-08 | Sulzer Ag | Barre de deviation des fils de chaine d'un metier a tisser |
DD100753A5 (de) * | 1972-11-30 | 1973-10-05 | ||
DE3346030A1 (de) * | 1983-12-20 | 1985-06-20 | Institute für Textil- und Faserforschung Stuttgart, 7306 Denkendorf | Webmaschine |
DE4427129C2 (de) * | 1994-07-30 | 1998-07-30 | Dornier Gmbh Lindauer | Spanneinheit für die Webkette einer Webmaschine |
DE102006061376A1 (de) * | 2006-12-23 | 2008-06-26 | Lindauer Dornier Gmbh | Streichbaum für eine Webmaschine |
DE202010004517U1 (de) * | 2010-04-01 | 2011-10-05 | Lindauer Dornier Gmbh | Vorrichtung zum Ausgleich von Zugkraftänderungen in Kettfäden an einer Webmaschine |
BE1019474A3 (nl) * | 2010-09-06 | 2012-07-03 | Picanol Nv | Sleep voor weefmachine. |
DE102013219942A1 (de) * | 2013-10-01 | 2015-04-02 | Lindauer Dornier Gesellschaft Mit Beschränkter Haftung | Verfahren und Vorrichtung zum Aufbringen von Kräften und Bewegungen auf Kettfäden einer Webmaschine |
CN204039634U (zh) * | 2014-06-30 | 2014-12-24 | 山东日发纺织机械有限公司 | 一种毛巾织机毛经张力控制装置 |
-
2016
- 2016-09-02 DE DE102016216610.7A patent/DE102016216610B3/de not_active Expired - Fee Related
-
2017
- 2017-08-10 JP JP2019512305A patent/JP2019529730A/ja active Pending
- 2017-08-10 EP EP17755454.0A patent/EP3507405B1/de active Active
- 2017-08-10 CN CN201780053863.7A patent/CN109642363B/zh not_active Expired - Fee Related
- 2017-08-10 WO PCT/EP2017/070337 patent/WO2018041592A1/de unknown
- 2017-08-14 TW TW106127420A patent/TW201812129A/zh unknown
Also Published As
Publication number | Publication date |
---|---|
WO2018041592A1 (de) | 2018-03-08 |
CN109642363A (zh) | 2019-04-16 |
JP2019529730A (ja) | 2019-10-17 |
TW201812129A (zh) | 2018-04-01 |
DE102016216610B3 (de) | 2017-11-02 |
EP3507405B1 (de) | 2020-06-17 |
CN109642363B (zh) | 2021-06-25 |
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