Three-dimensional weaving yarn tension active control device and system
Through the three-dimensional woven yarn tension active control device, the yarn tension is controlled by using the motor and clamping cylinder, and the real-time regulation of yarn tension is achieved with sensor feedback, which solves the problem of unstable yarn tension in three-dimensional woven and improves the stability and efficiency of the braiding process.
Patent Information
- Application Number
- CN202510562797.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2025-07-18
AI Technical Summary
During the three-dimensional weaving process, the yarn tension is unstable and difficult to achieve controllable, affecting the prefabricated body forming quality and composite material performance.
The three-dimensional woven yarn tension active control device is adopted, including a warp yarn rack, layer control unit and a segmented sensor group. The yarn tension is controlled through the motor and the clamping cylinder, and real-time feedback and closed-loop control are achieved in combination with the tension sensor and the controller.
The yarn tension is stable and adjustable, the braiding process is more stable, and the weaving efficiency and forming quality are improved.
Smart Images
Figure CN120328261A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field, and in particular to a three-dimensional woven yarn tension active control device and system. Background Art
[0002] Advanced composite materials are composed of advanced fiber reinforcements and high-performance matrices, and have excellent mechanical properties such as high specific strength and high impact resistance, becoming a key breakthrough technology for the new generation of aircraft technology. During the weaving process of composite preforms, the organizational structure, yarn tension, and yarn density jointly affect the forming quality of the preform and the properties of the composite material. In order to meet the requirements of different organizational structures for the yarn tension of the preform, it is necessary to perform adjustable, stable, and reliable tension control on the yarn.
[0003] Three-dimensional weaving has the advantages of high automation and high forming efficiency, but the resulting problems such as mechanical vibration and unstable yarn output affect the stability of the yarn tension. At the same time, the lifting and lowering of the heddles caused by the forming principle of three-dimensional weaving will also cause a certain degree of tension fluctuation to the yarn tension. Therefore, how to achieve stable and adjustable warp yarn tension control in three-dimensional weaving has become the focus of current research. Summary of the Invention
[0004] Object of the Invention: Aiming at the above-mentioned disadvantages, the present invention provides a three-dimensional woven yarn tension active control device and system.
[0005] Technical Solution: To solve the above problems, the present invention adopts a three-dimensional woven yarn tension active control device, which includes a warp beam, and a layer control unit installed inside the warp beam. The layer control unit includes an outer frame and a warp yarn winding and unwinding module. The warp yarn winding and unwinding module includes a motor 1, a rotating shaft 1, a clamping shaft 1, and a clamping cylinder. The motor 1 is fixed on the outer frame. One end of the rotating shaft 1 is connected to the output end of the motor 1, and the other end of the rotating shaft 1 is installed on the outer frame. A cylinder fixing device is installed on the rotating shaft 1, the clamping cylinder is installed on the cylinder fixing device, and the clamping shaft 1 is installed at the output end of the clamping cylinder. The rotation of the rotating shaft 1 and the clamping shaft 1 approaching or separating are controlled by the telescopic movement of the clamping cylinder.
[0006] Furthermore, the warp beam further includes an outer frame and an inner frame. The inner frame and the layer control unit are both installed inside the outer frame. A yarn bobbin shaft for installing a yarn bobbin is installed on the inner frame.
[0007] Furthermore, a front reed and a rear reed are installed on the outer frame, and the warp yarn winding and unwinding module is located between the front reed and the rear reed.
[0008] Furthermore, the cylinder fixing device includes a cylinder seat and a cylinder plate provided on the cylinder seat. The cylinder seat is fixedly connected to the rotating shaft 1, and the clamping cylinder is installed on the cylinder plate.
[0009] Further, a plurality of layer control units arranged in a layered manner are installed in the warp beam. The clamping cylinders of each layer control unit are arranged in a staggered manner with the clamping cylinders of adjacent layer control units to prevent the clamping cylinders from colliding when the first rotating shaft rotates.
[0010] Further, a speed reducer and a coupling are also provided between the first motor and the first rotating shaft.
[0011] Further, the axes of the first rotating shaft and the first clamping shaft are parallel to each other.
[0012] The present invention also provides a control system including the above three-dimensional woven yarn tension active control device, further including a segmented sensor group and a controller. The segmented sensor group includes a plurality of tension sensors. The tension sensors are used to measure the yarn tension after being adjusted by the warp beam. The controller is used to control the layer control unit according to the data of the tension sensors.
[0013] Further, the segmented sensor group further includes a fixing frame, and the tension sensors are slidably installed on the fixing frame.
[0014] Further, it further includes a woven fabric table and a warp yarn coiling mechanism. The woven fabric table is used for weaving warp yarns and weft yarns, and the warp yarn coiling mechanism is used for coiling warp yarns.
[0015] Beneficial effects: Compared with the prior art, the remarkable advantage of the present invention is that the active yarn winding and unwinding and the adjustment of the yarn tension are realized through the warp yarn winding and unwinding module, so that the yarn tension during the weaving process is controlled, and the weaving process is more stable; in cooperation with the tension sensors and the controller, the real-time feedback of the yarn tension is carried out to realize the active control and closed-loop feedback of the yarn tension. Description of the Drawings
[0016] Figure 1 It is a schematic structural diagram of the warp beam of the present invention;
[0017] Figure 2 It is an enlarged schematic structural diagram of the interior of the warp beam of the present invention;
[0018] Figure 3 It is a schematic structural diagram of the warp yarn winding and unwinding module of the present invention;
[0019] Figure 4 It is a schematic overall structural diagram of the control system of the present invention;
[0020] Figure 5 It is a schematic structural diagram of the segmented sensor group of the present invention;
[0021] Figure 6 It is a schematic diagram of the yarn passing through the segmented sensor group of the present invention;
[0022] Figure 7Schematic diagram of the structure of the weaving table of the present invention;
[0023] Figure 8 Schematic diagram of the structure of the warp crimping mechanism of the present invention. Detailed implementation manners
[0024] As Figure 1 and Figure 2 shown, a three-dimensional woven yarn tension active control device in this embodiment includes a warp beam 1, and the warp beam 1 includes an outer frame 101, an inner frame 102 and a layer control unit 103. The inner frame 102 and the layer control unit 103 are both installed inside the outer frame 101, and are respectively located on the left and right sides of the outer frame 101. The inner frame 102 is a plurality of vertically arranged fixed bars, and both the front and rear end faces of the fixed bars are provided with bobbin shafts 10304 for installing bobbins.
[0025] The layer control unit 103 includes an outer frame and a warp take-up and pay-off module 10303. The outer frame is in the shape of a right-angled quadrilateral. A front reed 10301 is installed on the side of the outer frame close to the inner frame 102. A rear reed 10302 is installed on the opposite surface of the front reed 10301. The warp take-up and pay-off module 10303 is located between the front reed 10301 and the rear reed 10302.
[0026] As Figure 3 shown, the warp take-up and pay-off module 10303 includes a first motor 1030301, a first rotating shaft 1030304, a first clamping shaft 1030306, and a clamping cylinder 1030310. The first motor 1030301 is installed on the side of the outer frame perpendicular to the front reed 10301 and the rear reed 10302. The output end of the first motor 1030301 is connected to a speed reducer 1030302. One end of the first rotating shaft 1030304 is connected to the speed reducer 1030302 through a coupling 1030303, and the other end of the first rotating shaft 1030304 is installed on the outer frame. A cylinder seat 1030308 is provided on the first rotating shaft 1030304. A cylinder plate 1030309 is installed on the cylinder seat 1030308. The clamping cylinder 1030310 is installed on the cylinder plate 1030309. The first clamping shaft 1030306 is installed at the output end of the clamping cylinder 1030310. In order to make the first clamping shaft 1030306 operate stably, two sets of clamping cylinder devices are arranged on both sides of the first rotating shaft 1030304 to respectively clamp the head and tail sides of the first clamping shaft 1030306. The axes of the first rotating shaft 1030304 and the first clamping shaft 1030306 are parallel to each other. During weaving, the yarn passes through between the first rotating shaft 1030304 and the first clamping shaft 1030306, and the first rotating shaft 1030304 and the first clamping shaft 1030306 are controlled to approach or separate by the telescopic movement of the clamping cylinder 1030310 to adjust the yarn tension.
[0027] To improve the knitting efficiency, the warp beam 1 has a multi-layer superimposed structure. In this embodiment, six layer control units 103 are arranged in a layered manner. Correspondingly, six layers of yarn bobbin shafts 10304 are also provided on the inner frame 102. To prevent the clamping cylinders from colliding when the rotating shafts of adjacent layer control units 103 rotate, the clamping cylinders 1030310 of adjacent control units 103 are arranged in a staggered manner. Specifically, the rotating shaft two 1030305 and the clamping shaft two 1030307, which are located below the rotating shaft one 1030304 and the clamping shaft one 1030306, can be seen that the cylinder seat on the rotating shaft two is arranged at a different position from the rotating shaft one, and there will be no collision of the clamping cylinders during rotation.
[0028] As Figures 4 to 8 shown, the present invention also provides a control system including the above-mentioned three-dimensional woven yarn tension active control device. The control system further includes a segmented sensor group 2, a weaving table 3, a warp beam coiling mechanism 4, and a controller. The segmented sensor group 2 includes a fixing frame 202 and a tension sensor 201. In this embodiment, there are three vertical slide rails on the fixing frame, and a tension sensor 201 is slidably installed on each slide rail. The height of the tension sensor 201 can be changed by sliding to adapt to the position of the yarn under different knitting states.
[0029] The weaving table 3 includes a bracket and a heddle 301, a harness frame 302, a harness frame cylinder 303, and a reed 304 installed on the bracket. The harness frame cylinder 303 is connected to the harness frame 302. The weaving table 3 is used for knitting warp and weft yarns. The warp yarns pass through the heddle 301, pass through the harness frame 302, and reach the reed 304. The lifting and lowering actions of the warp yarns are completed by the harness frame cylinder 303 pushing the harness frame. After weft insertion, the reed 304 beats up the weft.
[0030] The warp beam coiling mechanism 4 includes a motor two 401, a drag chain 402, an output shaft 403, and a binding shaft 404. The motor two 401 is connected to the output shaft 403. The drag chain 402 is installed at both ends of the output shaft 403. The binding shaft 404 is connected to the drag chain 402. After the warp yarns pass through the reed 304, they are fixed on the binding shaft 404. When it is necessary to coil the warp yarns, the motor two 401 is rotated. The motor two 401 outputs power to the output shaft 403. The output shaft 403 drives the drag chain 402 to rotate, and then drives the binding shaft 404 to move, realizing the coiling action of the warp yarns.
[0031] The working process of the control system of the present invention is as follows: Install the yarn bobbin on the inner frame 102. The warp yarn is led out from the yarn bobbin shaft 10304, first passes through the back reed 10302, then passes through the warp yarn take-up and pay-off module 10303, and finally passes out through the front reed 10301. When the warp yarn passes through the warp yarn take-up and pay-off module 10303, it passes between the rotating shaft and the clamping shaft. After passing through the warp yarn frame 1, the warp yarn passes through the segmented sensor group 2, and the tension is detected by the tension sensor 201. In this embodiment, there are six layers of warp yarns, and the six layers of warp yarns are symmetrically distributed. Three tension sensors are set to detect the tension of three layers of warp yarns, and the tension of the remaining three layers can be obtained through the mathematical relationship between the warp yarn layers. After the warp yarn passes through the segmented sensor group 2, it then passes through the weaving loom table 3 and the warp yarn coiling mechanism 4 in sequence to complete the weaving. The controller controls the motor and the clamping cylinder of the layer control unit 103 according to the data of the tension sensor 201 to adjust the tension of the warp yarn.
[0032] The present embodiment provides specific operation methods for four regulation modes:
[0033] Warp yarn lifting mode: When the warp yarn of a specific layer needs to be lifted, the clamping cylinder of this layer retracts, driving the clamping shaft to separate from the rotating shaft. At this time, the warp yarn can freely pass through the warp yarn take-up and pay-off module. When the heddle frame cylinder completes the extension action and the warp yarn completes the lifting action, the clamping cylinder is pushed out, driving the clamping shaft to clamp with the rotating shaft. At this time, the warp yarn cannot freely pass through the warp yarn take-up and pay-off module. The motor 1 compares the value of the sensor with the set target warp yarn tension and rotates the motor 1 to complete the tension control of the warp yarn.
[0034] Warp yarn lowering mode: When the warp yarn of a specific layer needs to be lowered, the clamping cylinder is pushed out, driving the clamping shaft to clamp with the rotating shaft, locking the warp yarn. Then the heddle frame cylinder completes the return action, and the heddle frame descends. The motor 1 compares the data of the sensor with the set target tension and rotates the motor 1 to complete the tension control of the warp yarn.
[0035] Beating-up mode: Before beating-up, the clamping cylinder is pushed out, driving the clamping shaft to clamp with the rotating shaft, locking the warp yarn. The beating-up reed moves back and forth to complete the beating-up action. When the beating-up reed moves back and forth, there will be a certain friction between the beating-up reed and the weft yarn and the warp yarn, resulting in a change in the warp yarn tension. During the whole process, the motor 1 compares the data of the sensor with the set target tension and rotates the motor 1 to complete the tension control of the warp yarn.
[0036] Warp yarn coiling mode: When warp yarn coiling is required, the clamping cylinder returns, driving the clamping shaft to separate from the rotating shaft. At this time, the warp yarn can freely pass through the warp yarn take-up and pay-off module. The motor 2 starts to rotate, driving the output shaft, the drag chain and the binding shaft to move to complete the coiling action of the warp yarn.
[0037] The present invention realizes active yarn winding and unwinding and the adjustment of yarn tension through the warp yarn winding and unwinding module, so that the yarn tension is controlled during the knitting process, and the knitting process is more stable; cooperating with the tension sensor and the controller, real-time feedback of the yarn tension is carried out to realize the active control and closed-loop feedback of the yarn tension.
Claims
1. An active control device for the tension of three-dimensional woven yarns, characterized in that It includes a warp beam (1) and a layer control unit (103) installed inside the warp beam (1). The layer control unit (103) includes an outer frame and a warp winding and unwinding module (10303). The warp winding and unwinding module (10303) includes a first motor (1030301), a first rotating shaft (1030304), a first clamping shaft (1030306), and a clamping cylinder (1030310). The first motor (1030301) is fixed on the outer frame. One end of the first rotating shaft (1030304) is connected to the output end of the first motor (1030301), and the other end of the first rotating shaft (1030304) is installed on the outer frame. A cylinder fixing device is installed on the first rotating shaft (1030304). The clamping cylinder (1030310) is installed on the cylinder fixing device. The first clamping shaft (1030306) is installed on the output end of the clamping cylinder (1030310). The approach or separation of the first rotating shaft (1030304) and the first clamping shaft (1030306) is controlled by the telescopic movement of the clamping cylinder (1030310).
2. The active control device for three-dimensional woven yarn tension according to claim 1, wherein, The warp beam (1) further includes an outer frame (101) and an inner frame (102). The inner frame (102) and the layer control unit (103) are both installed inside the outer frame (101). A bobbin shaft (10304) for installing bobbins is installed on the inner frame (102).
3. The active control device for three-dimensional woven yarn tension according to claim 1, wherein, A front reed (10301) and a rear reed (10302) are installed on the outer frame. The warp winding and unwinding module (10303) is located between the front reed (10301) and the rear reed (10302).
4. The three-dimensional woven yarn tension active control device according to claim 1, wherein The cylinder fixing device includes a cylinder seat (1030308) and a cylinder plate (1030309) provided on the cylinder seat (1030308). The cylinder seat (1030308) is fixedly connected to the first rotating shaft (1030304). The clamping cylinder (1030310) is installed on the cylinder plate (1030309).
5. The active control device for three-dimensional woven yarn tension according to claim 1, wherein A plurality of layer control units (103) arranged in layers are installed inside the warp beam (1). The clamping cylinders (1030310) of each layer control unit (103) are arranged in a staggered manner with the clamping cylinders (1030310) of adjacent layer control units (103) to avoid collision of the clamping cylinders (1030310) when the first rotating shaft (1030304) rotates.
6. The active control device for three-dimensional woven yarn tension according to claim 1, characterized in that, A speed reducer (1030302) and a coupling (1030303) are further provided between the first motor (1030301) and the first rotating shaft (1030304).
7. The active control device for three-dimensional woven yarn tension according to claim 1, characterized in that, The axes of the first rotating shaft (1030304) and the first clamping shaft (1030306) are parallel to each other.
8. A control system comprising the three-dimensional woven yarn tension active control device according to any one of claims 1-7, characterized in that, It further includes a segmented sensor group (2) and a controller. The segmented sensor group (2) includes a plurality of tension sensors (201). The tension sensors (201) are used to measure the yarn tension after being adjusted by the warp beam (1). The controller is used to control the layer control unit (103) according to the data of the tension sensors (201).
9. The control system according to claim 8, wherein The segmented sensor group (2) further includes a fixing bracket (202), and the tension sensor (201) is slidably mounted on the fixing bracket (202).
10. The control system according to claim 8, wherein, It further includes a weaving table (3) and a warp coiling mechanism (4). The weaving table (3) is used for weaving warp and weft yarns, and the warp coiling mechanism (4) is used for coiling the warp yarns.