Warp beam let-off device for large-opening weaving process and use method

Abstract

The invention discloses a warp beam let-off device for a large-opening weaving process and a using method, and belongs to the field of spinning. The warp beam let-off device comprises a small warp beam, a large-opening warp beam, a small-opening warp beam and a large-opening warp beam, the connection of the first spring and the first spring base is set as follows: when the elastic force of the first spring is lower than a threshold value, the first spring and the first spring base are mutually fixed, and when the elastic force of the first spring exceeds the threshold value, the first spring and the first spring base can slide; the driving gear assembly is fixedly connected with the first spring and can be driven by the first spring to rotate. The driven gear assembly is meshed with the driving gear assembly; the second clockwork spring is fixedly connected with the driven gear assembly and is driven by the driven gear assembly to rotate, and the second clockwork spring is in one-way connection with the second clockwork spring base.

Description

Technical Field

[0001] The invention relates to the field of textiles, and in particular to a warp beam feeding device for a large-opening weaving process and a use method thereof. Background Art

[0002] The warp feed device is a crucial component in textile machinery. It is responsible for feeding the warp yarn into the weaving area in a continuous and uniform manner and accurately controlling the tension of the warp yarn. The adjustment of the warp yarn tension not only affects the weaving efficiency, but also plays a decisive role in the quality of the final fabric. In the weaving process of special fibers, the unique properties of the fibers put forward higher requirements on the weaving process. One of the most critical links is the clarity of the warp yarn opening during the weaving process. To ensure the clarity of the warp yarn opening, especially when dealing with high-performance or special fibers, it is particularly important to use a large opening weaving process. Large opening weaving can not only make the movement trajectory of the warp yarn at the heald more significant, but also make the interweaving process of the fibers smoother. This is because in the large opening process, the warp yarn has a larger travel arm than the traditional weaving method, and the warp yarn needs to be compensated for a larger length each time it is opened. This length compensation can effectively avoid the entanglement or uneven interweaving of the warp yarn caused by insufficient opening, thereby ensuring that each fiber can be fully stretched and adjusted during the weaving process. However, the large opening process has extremely high requirements for the tension control of the warp yarn. In order to ensure the flatness and uniformity of woven products and reduce fiber damage, the warp let-off device must be able to dynamically adjust the warp yarn length and tension to cope with the changes in warp yarn length each time the weft is opened, ensuring that the warp yarn maintains consistent tension throughout the weaving process.

[0003] Chinese patent CN202210088972.5 discloses a variable width multi-layer fabric warp feeding device, weaving system and warp feeding method, which uses a magnetic powder brake to provide resistance to the differential warp beam to achieve warp tension control. During the warp opening movement, the magnetic powder brake can provide tension for the warp yarn, and when the tension reaches a certain value, the magnetic powder brake and the warp beam rotate to complete the yarn feeding to ensure the uniformity of tension during the opening process. However, the magnetic powder brake can only rotate in one direction and cannot achieve warp yarn recovery. During the warp closing process, the required warp yarn length is reduced, the warp yarn output from the warp beam is relaxed, and the warp yarn is in a tension-free state. This method can only control the warp yarn tension during the opening process, but cannot control the warp yarn tension during the closing process. Therefore, this method is only suitable for the heald lifting process with small openings.

[0004] Chinese patent CN201611140218.2 discloses a large-capacity constant tension warp feeding system and its yarn laying method. This method controls the rotation of the yarn winding disk through a spring sheet, and a hole is provided at the center position and the position off the center of the winding disk. The warp yarn passes through the two holes. When the warp tension is too tight, the winding disk rotates forward to complete the warp feeding. When the warp tension is over-fed, the elasticity of the spring sheet causes the winding disk to rotate to achieve yarn recovery. In this method, each winding disk only controls one warp yarn, so when weaving fabrics that require a very large number and length of warp yarns, the required warp feeding system occupies a very large area. In addition, since the unwinding tow is wound and bent many times, it is not suitable for easily worn carbon fibers, etc.

[0005] Chinese patent CN202210797425.4 discloses a tension application and detection device for the warp feeding system of a special loom for weaving spacer fabrics. The method realizes the function of controlling the warp tension through a double pendulum roller mechanism, a sensor and a drive motor. In the method, the warp drives the double pendulum roller mechanism to swing. When the tension reaches a certain value, the sensor senses the current position of the double pendulum roller mechanism and feeds back to the motor. The motor runs to transport the warp yarn, at which time the warp yarn tension decreases, the double pendulum roller mechanism leaves the sensor, and the motor stops transporting the warp yarn. The method realizes the transportation, recovery and tension control of the warp yarn through the double pendulum roller mechanism, but the swing amplitude of the double pendulum roller mechanism is limited, that is, the length of the warp yarn transported and recovered is limited, and the weaving demand of large opening cannot be achieved. In addition, the warp yarn on the same warp beam can only be used for weaving warp yarns with equal warp feeding amount. The warp beam with the same width as the fabric used in the method is not suitable for jacquard looms with complex product structures and large differences in warp feeding amount.

[0006] In view of this, in order to meet the weaving needs of special fibers with large openings, a warp feeding mechanism is needed that can realize large-scale delivery and recovery of warp yarns, and can ensure tension consistency during the warp feeding process and reduce fiber wear. Summary of the invention

[0007] In order to solve the problems in the prior art, the present application discloses a warp beam letting-off device for a large opening weaving process, comprising: A small warp beam, which can be rotated by the warp yarn; a first mainspring and a first mainspring base, wherein the connection between the first mainspring and the first mainspring base is set such that when the elastic force of the first mainspring is lower than a threshold value, the first mainspring and the first mainspring base are fixed to each other, and when the elastic force of the first mainspring exceeds the threshold value, the first mainspring and the first mainspring base can slide; The driving gear assembly is fixedly connected to the first mainspring and can be driven to rotate by the first mainspring.

[0008] A driven gear assembly meshing with the driving gear assembly; A second mainspring and a second mainspring base, wherein the second mainspring is fixedly connected to a driven gear assembly and driven to rotate by the driven gear assembly, wherein the second mainspring and the second mainspring base are unidirectionally connected, wherein the unidirectional connection is set such that when the second mainspring rotates around a first direction, the second mainspring base is driven to rotate, and when the second mainspring rotates around a second direction, the second mainspring base can remain stationary, and the first direction and the second direction are opposite; A magnetic powder brake provides resistance to the rotation of the second spring base.

[0009] In the improved solution, a convex portion is provided on the surface of the first spring base, and the first spring and the first spring base are connected via the convex portion.

[0010] In the improved solution, the contact position between the second spring base and the second spring is a ratchet and pawl mechanism, so that the second spring base and the second spring are in one-way transmission.

[0011] In the improved solution, the elastic coefficient of the first spring is 10N / cm In the improved solution, the elastic coefficient of the second mainspring is 20N / cm.

[0012] In the improved solution, the first spring base can apply a maximum curling force of 50N to the first spring. When the elastic force of the first spring reaches 50N, slippage can occur between the first spring base and the first spring.

[0013] In the improved solution, the magnetic powder brake is set to have a resistance of 30N, and the second spring base starts to rotate when the rotational force applied to it reaches 30N.

[0014] The present application also discloses a method for using a warp beam let-off device in a large opening weaving process, comprising the following steps: S1: During the weaving process, the warp yarn pulls the small warp beam and the first spring base to rotate clockwise, and the first spring begins to tighten; S2: The opening movement continues; when the elastic force of the first spring reaches a certain value, the driving gear assembly starts to rotate clockwise under the drive of the first spring, and the driven gear assembly starts to rotate counterclockwise; the second spring starts to be tightened; there is a speed difference between the first spring base and the driving gear assembly; S3: The opening movement continues. When the elastic force of the second spring exceeds the setting value of the magnetic powder brake, the second spring base starts to rotate slowly. There is a speed difference between the second spring base and the driven gear assembly. S4: The opening movement continues. At this time, due to the existence of speed difference, the warp tension is always increasing. When the warp reaches a certain value, the first spring and the first spring base slip; S5: When the opening movement reaches the maximum, the heddle lifting mechanism drives the warp yarn to start closing movement; at this time, the warp yarn tension begins to decrease; the second spring base stops rotating, and the small warp shaft and the first spring base rotate rapidly counterclockwise under the elastic action of the first spring and the second spring, and the warp yarn is recovered by the warp shaft, and the first spring and the second spring continue to provide tension for the warp yarn until the closing movement is completed.

[0015] The present application provides mechanical compensation for yarns during the weaving process, realizes warp length compensation in a larger range, and adapts to large opening weaving processes; warp recovery is achieved through a clockwork spring, so that the warp still has tension during the closing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the entire warp let-off device; Figure 2 It is a structural schematic diagram of a warp let-off device; Figure 3 It is a schematic diagram of the spring connection structure; Figure 4 It is the principle flow chart of the warp let-off device; Figure 5 is a schematic diagram of the method of using the warp let-off device; Figure 6 It is a cross-sectional view of the minor warp axis; Figure 7 yes Figure 6 A bird's-eye view of Markings in the figure: 01-small warp axis, 011-first cavity, 012-second cavity, 013-limiting column, 02-first spring, 03-6005 bearing, 04-6000, 05-first spring base, 06-driving gear assembly, 07-bearing bolt, 08-warp axis bolt, 081-spring, 082-rotating shaft, 083-side column, 09-cover, 10-base, 11-spring bolt, 12-second spring, 13-6005 bearing, 14-6000 bearing, 15-second spring base, 16-driven gear assembly, 17-magnetic powder brake. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] like Figure 1 and Figure 2As shown, the warp beam feeding device of the large opening weaving process disclosed in this embodiment includes: a small warp beam 01, a first spring 02, a 6005 bearing 03, a 6000 bearing 04, a first spring base 05, a driving gear assembly 06, a bearing bolt 07, a warp beam bolt 08, a cover 09, a base 10, a spring bolt 11, a second spring 12, a 6005 bearing 13, a 6000 bearing 14, a second spring base 15, a driven gear assembly 16, and a magnetic powder brake 17.

[0019] like Figure 2 As shown, the small warp axis 01 is connected to the first clockwork base 05 via a warp axis bolt 08. The connection between the first clockwork spring 02 and the first clockwork base 05 is set such that when the elastic force of the first clockwork spring 02 is lower than a threshold value, the first clockwork spring 02 and the first clockwork base 05 are fixed to each other, and when the elastic force of the first clockwork spring 02 exceeds the threshold value, the first clockwork spring 02 and the first clockwork base 05 can slide.

[0020] When the small warp shaft 01 rotates and drives the first spring base 05 to rotate, the first spring 02 starts to rotate and tightens and drives the driving gear assembly 06 to start rotating. The driven gear assembly 16 meshes and rotates with the driving gear assembly 06. The driven gear assembly 16 drives the second spring base 15 to rotate through the second spring 12, and the magnetic powder brake 17 provides motion resistance for the rotation of the second spring base 15.

[0021] like Figure 3 As shown, in a preferred solution, the contact position between the first spring base 05 and the first spring 02 is "convex and concave". When the elastic force of the first spring 02 is small, the two do not slip, and when the elastic force of the first spring 02 reaches a certain value, the two begin to slip. In a more specific solution, the surface of the first spring base 05 is provided with a convex portion, and the first spring 02 and the first spring base 05 are connected through the convex portion.

[0022] like Figure 3 As shown, the contact position between the second spring base 15 and the second spring 12 is a ratchet pawl mechanism. When the driven gear assembly 16 rotates counterclockwise, it drives the second spring base 15 to rotate counterclockwise, and when the driven gear assembly 16 rotates clockwise, the second spring base 15 does not rotate.

[0023] In a more specific solution, the small warp beam 01 stores warp yarns with a width of 100 mm and a number of 30 yarns. The elastic coefficient of the first spring is 10 N / cm. The elastic coefficient of the second spring is 20 N / cm. The first spring base can apply a maximum curling force of 50 N to the first spring, that is, when the elastic force of the first spring reaches 50 N, the first spring base and the first spring will slip. The driven gear set and the driving gear set adopt a module and a number of teeth of 2 M and 30 teeth respectively. The magnetic powder brake sets the resistance to 30 N, that is, the second spring base starts to rotate slowly after the rotational force applied reaches 30 N. This tension is suitable for weaving fibers such as carbon fiber, basalt, quartz, and alumina that require large length compensation. The m=8, n=4, =5 can adapt to the weaving width of 800 mm, the single-layer fabric warp density of 12 yarns / cm, and the number of layers of 5 fabrics. In some other embodiments, m=10, n=5, =20, which can adapt to the weaving width of 1000mm, the single-layer fabric warp density of 15 strands / cm, and the number of layers of fabric is 20. In some other embodiments, the difference is that the elastic coefficient of the first spring is 20N / cm. The elastic coefficient of the second spring is 30N / cm. The first spring base can apply a maximum curling force of 60N to the first spring, that is, when the elastic force of the first spring reaches 60N, the first spring base and the first spring will slip. The module and number of teeth of the driven gear set and the driving gear set are 2M and 30 teeth respectively. The magnetic powder brake sets the resistance to 40N, that is, the second spring base starts to rotate slowly after the rotational force applied reaches 40N. This tension is suitable for weaving fibers such as aramid, ultra-high molecular weight polyethylene, polyimide, etc. that require good elasticity.

[0024] like Figure 4 As shown, the distribution number of the warp beam let-off device during use is x×y×z, where x represents the number distributed in the horizontal direction, y represents the number distributed in the longitudinal direction, and z represents the number distributed in the vertical direction. x is used to adapt to the width of the fabric, y is used to adapt to the surface density of the fabric, and z is used to adapt to the number of layers of the fabric. Among them, 1≤x≤10, 1≤y≤10, and 1≤z≤10.

[0025] In a more preferred embodiment, Figure 6As shown, the small warp axis 01 is provided with a first cavity 011 and a second cavity 012 located at the bottom of the first cavity 011, two limiting columns 013 are provided inside the second cavity 012, a spring 081 is provided inside the first cavity 011, a warp axis bolt 08 is inserted into the first cavity 011, a rotating shaft 082 is provided at the end of the warp axis bolt 08 and is accommodated in the second cavity 012, and side columns 083 are provided on both sides of the rotating shaft 082; in a natural state, the warp axis bolt 08 and the small warp axis 01 are connected by the spring 081, and the spring 081 can be preloaded by torque, so that there is a torsional preload force between the warp axis bolt 08 and the small warp axis 01, more specifically, through the side column 083. The rotation of the warp shaft bolt 08 in one direction is restricted so that the warp shaft bolt 08 is preloaded. When the warp opening gradually increases, the torque of the small warp shaft 01 on the warp shaft bolt 08 will gradually increase. When the torque of the small warp shaft 01 on the warp shaft bolt 08 is less than the preload force, the small warp shaft 01 and the warp shaft bolt 08 will not rotate axially. When the torque of the small warp shaft 01 on the warp shaft bolt 08 is greater than the preload force, the small warp shaft 01 and the warp shaft bolt 08 will rotate axially relative to each other, further providing warp length compensation to adapt to the large opening weaving process. The preload force can be controlled by the parameters of the spring. One end of the spring is connected to the warp shaft bolt 08, and the other end is connected to the small warp shaft 01.

[0026] The method of using the device of the present application is as follows: Figure 5 As shown, the use method and principle of the warp let-off device and the use method thereof are as follows: S1: During the weaving process, the heddle lifting mechanism drives the warp yarn to perform opening movement. At this time, the warp yarn tension begins to increase continuously. The warp yarn pulls the small warp shaft 01 and the first spring base 05 to rotate clockwise at a speed of v1, and at this time, the first spring 02 begins to tighten.

[0027] S2: The opening movement continues. When the elastic force of the first spring 02 reaches a certain value, the driving gear assembly 06 starts to rotate clockwise at a speed v2 driven by the first spring 02, and the driven gear assembly 16 starts to rotate counterclockwise at a speed v2, and the second spring 12 starts to be tightened. There is a speed difference between the first spring base and the driving gear assembly 06, v1>v2.

[0028] S3: The opening movement continues, and when the elastic force of the second spring 12 exceeds the set value of the magnetic powder brake 17 F3, the second spring base 15 starts to rotate slowly, with a speed v3. There is a speed difference between the second spring base 15 and the driven gear assembly 16, v2>v3.

[0029] S4: The opening movement continues. At this time, due to the existence of the speed difference, the warp tension is always increasing. When the warp reaches a certain value, the first spring 02 and the first spring base 05 slip.

[0030] S5: When the opening movement reaches the maximum, the harness lifting mechanism drives the warp yarn to start the closing movement. At this time, the warp yarn tension begins to decrease. The second spring base 15 stops rotating, and the small warp shaft 01 and the first spring base 05 rotate rapidly counterclockwise under the elastic action of the first spring 02 and the second spring 12. The warp yarn is recovered by the warp shaft, and the first spring 02 and the second spring 12 continue to provide tension for the warp yarn until the closing movement is completed. The above steps S1 to S5 are repeated.

[0031] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A warp beam let-off device for a large opening weaving process, characterized in that: Included are: A small warp beam (01), which can be driven to rotate by the warp yarn; a first spring (02) and a first spring base (05), wherein the connection between the first spring (02) and the first spring base (05) is set such that when the elastic force of the first spring (02) is lower than a threshold value, the first spring (02) and the first spring base (05) are fixed to each other, and when the elastic force of the first spring (02) exceeds the threshold value, the first spring (02) and the first spring base (05) are able to slide; A driving gear assembly (06) is fixedly connected to the first mainspring (02) and can be driven to rotate by the first mainspring (02). A driven gear assembly (16) meshing with the driving gear assembly (06); A second mainspring (12) and a second mainspring base (15), wherein the second mainspring (12) and a driven gear assembly (16) are fixedly connected and driven to rotate by the driven gear assembly (16), wherein the second mainspring (12) and the second mainspring base (15) are unidirectionally connected, wherein the unidirectional connection is configured such that when the second mainspring (12) rotates in a first direction, the second mainspring base (15) is driven to rotate, and when the second mainspring (12) rotates in a second direction, the second mainspring base (15) can remain stationary, and the first direction and the second direction are opposite; A magnetic powder brake (17) provides resistance to the rotation of the second spring base (15).

2. The warp beam let-off device for large opening weaving process according to claim 1, characterized in that: A convex portion is provided on the surface of the first clockwork spring base (05), and the first clockwork spring (02) and the first clockwork spring base (05) are connected via the convex portion.

3. The warp beam let-off device for large opening weaving process according to claim 2, characterized in that: The contact position between the second spring base (15) and the second spring (12) is a ratchet and pawl mechanism, so that the second spring base (15) and the second spring (12) are in one-way transmission.

4. The warp beam let-off device for large opening weaving process according to claim 3, characterized in that: The elastic coefficient of the first mainspring (02) is n N / cm, and the elastic coefficient of the second mainspring (12) is m N / cm, where m>n.

5. The warp beam let-off device for large opening weaving process according to claim 5, characterized in that: The first spring base can apply a maximum curling force of x N to the first spring. When the elastic force of the first spring reaches x N, slippage can occur between the first spring base and the first spring. The magnetic powder brake sets the resistance to y N. When the rotational force applied to the second spring base reaches yN, it starts to rotate, y<x.

6. A method for using a warp beam let-off device in a large opening weaving process, characterized in that: The steps include: S1: During the weaving process, the opening movement begins. The warp yarn pulls the small warp beam (01) and the first spring base (05) to rotate clockwise, and the first spring (02) begins to tighten; S2: The opening movement continues. When the elastic force of the first spring (02) reaches a certain value, the driving gear assembly (06) starts to rotate clockwise under the drive of the first spring (02), and the driven gear assembly (16) starts to rotate counterclockwise; the second spring (12) starts to be tightened; there is a speed difference between the first spring base and the driving gear assembly (06); S3: The opening movement continues. When the elastic force of the second spring (12) exceeds the set value of the magnetic powder brake (17), the second spring base (15) starts to rotate slowly; there is a speed difference between the second spring base (15) and the driven gear assembly (16); S4: The opening movement continues. At this time, due to the existence of the speed difference, the warp tension continues to increase. When the warp reaches a certain value, the first spring (02) and the first spring base (05) slip; S5: When the opening movement reaches the maximum, the sheath lifting mechanism drives the warp yarn to start the closing movement; at this time, the warp yarn tension begins to decrease; the second spring base (15) stops rotating, and the small warp shaft (01) and the first spring base (05) rotate rapidly counterclockwise under the elastic action of the first spring (02) and the second spring (12), and the warp yarn is recovered by the warp shaft, and the first spring (02) and the second spring (12) continue to provide tension for the warp yarn until the closing movement is completed.

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