Circumferential yarn implantation device and method based on composite material three-dimensional braiding equipment

Abstract

The present invention discloses a circumferential yarn implantation device and method based on composite material three-dimensional braiding equipment, wherein the circumferential yarn implantation device realizes an automated implantation scheme of the circumferential yarn through the coordinated control of a circumferential RGV tension adaptive yarn supply device (19), a circumferential yarn track telescopic device (23), and a circumferential RGV tension adaptive yarn supply start-stop control device (7). The circumferential yarn is driven to move circumferentially around a core mold through the circumferential RGV tension adaptive yarn supply device (19), and the circumferential yarn track telescopic device (23) and the circumferential RGV tension adaptive yarn supply start-stop control device (7) are coordinated to coordinate the chassis space and the yarn space trajectory, thereby completing the overall circumferential yarn automated implantation scheme device and method.

Description

Technical Field

[0001] The present invention belongs to the field of three-dimensional weaving of composite materials, and in particular relates to a circumferential yarn implantation device and method based on automated three-dimensional weaving equipment for composite materials. Background Art

[0002] Three-dimensional weaving of composite materials is a new type of advanced composite material forming process. Its forming structure can be divided into four structures: three-dimensional four-way, three-dimensional five-way, three-dimensional six-way and three-dimensional seven-way according to the internal yarn weaving direction.

[0003] The three-dimensional braided preform has the characteristics of multi-dimensional spatial continuity and multi-directional distribution of yarns. During the weaving process, the spatial interweaving pattern of the yarns is complex and the yarn gaps are small. The yarns of the three-dimensional four-way and five-way structure preforms are evenly arranged in the weaving unit according to the layer direction to achieve the yarn interweaving pattern, while the three-dimensional six-way structure preform needs to implant circumferential yarns between each layer of yarns on the basis of the three-dimensional five-way structure. So far, there is no mature and feasible automated implantation device for the three-dimensional six-way and three-dimensional seven-way structures to realize the automated weaving of the overall structure.

[0004] Therefore, a new technical solution is needed to solve the above problems. Summary of the invention

[0005] Purpose of the invention: In view of the problems existing in the prior art, the present invention provides a circumferential yarn implantation device and method based on composite material three-dimensional weaving equipment, which uses a multi-mechanism joint control method to complete this tedious task with a machine, thereby improving the implantation speed and automation of the circumferential yarn, reducing the burden of manual implantation, and saving weaving time. The circumferential yarn implantation device and method is an efficient, intelligent and fast detection method.

[0006] Technical solution: The present invention can adopt the following technical solution:

[0007] A circumferential yarn implantation device based on composite material three-dimensional braiding equipment comprises a circular chassis, a plurality of circumferential RGV tension adaptive yarn supply start-stop devices installed on the chassis, a plurality of circumferential yarn track telescopic devices installed on the chassis, and a circumferential RGV tension adaptive yarn supply device; the plurality of circumferential RGV tension adaptive yarn supply start-stop devices are evenly installed around the circular chassis, and a plurality of circumferential yarn track telescopic devices are arranged between two adjacent circumferential RGV tension adaptive yarn supply start-stop devices; the circumferential RGV tension adaptive yarn supply start-stop device is arranged on the chassis The circumferential yarn track telescopic devices extend from outside to inside on the chassis, and a plurality of circumferential yarn track telescopic devices also extend from outside to inside on the chassis, and the inner end of the circumferential RGV tension adaptive yarn supply start-stop device is provided with a first track unit located on the same circumference, and the inner end of the circumferential yarn track telescopic device is provided with a retractable or openable second track unit; when the second track units in all the circumferential yarn track telescopic devices are opened, all the first track units and the second track units form a complete circular track by connecting end to end; the circumferential RGV tension adaptive yarn supply device is installed on the circular track and moves along the circular track;

[0008] The circumferential yarn track telescopic device includes a sleeve, a telescopic rod located in the sleeve, and a second track unit installed at the front end of the telescopic rod. The second track unit includes two sub-track segments, and the same end of the two sub-track segments is hinged to the front end of the telescopic rod. When the telescopic rod is retracted, the two sub-track segments are retracted side by side in the sleeve; when the telescopic rod is extended, the two sub-track segments open outward to form an arc track, which serves as a component of the circular track.

[0009] Furthermore, the circumferential RGV tension adaptive yarn supply device includes a pressure block, a compression spring, a micro switch, a constant tension coil spring, a guide wheel mounting rod, a U-groove pulley, a fixing ring, a yarn tube, a device drive unit, a key switch, and a micro cam follower.

[0010] Furthermore, the circumferential RGV tension adaptive yarn supply device is provided with a U-groove pulley cooperating with the circular track, and the upper and lower edges of the first track unit and the second track unit are provided with steps cooperating with the U-groove pulley to position the adaptive yarn supply device and the circular track in the centripetal direction.

[0011] Furthermore, the circumferential RGV tension adaptive yarn supply start-stop device includes a guide rail bracket, a charging plug assembly, a linear guide rail, a cylinder, a guide rail mounting plate, and a cylinder fixing bracket.

[0012] The present invention also provides a circumferential yarn implantation method using the above circumferential yarn implantation device, comprising the following steps:

[0013] (1) The circumferential yarn track telescopic unit extends the sub-track segment through the telescopic rod, and the first track segment and the second track segment are spliced ​​together, and the global structure becomes a circular track parallel to the annular chassis;

[0014] (2) The circumferential RGV tension adaptive yarn supply device is started. While adaptively adjusting the yarn tension range, the device moves circumferentially along the spliced ​​circular track, carrying the yarn around the 1-5 yarn layers;

[0015] (3) After the circumferential RGV tension-adaptive yarn supply device completes the whole circumferential yarn implantation work around the circular track, when it returns to the RGV tension-adaptive yarn supply start-stop control device, the Hall switch on the upper part of the start-stop device detects the positioning magnet at the bottom of the device. At the same time, the needle cylinder at the bottom of the supply device extends and contacts the button switch at the bottom of the device, thereby stopping the operation of the tension-adaptive yarn supply device; at the same time, the yarn is picked up by relying on the densification mechanism. When the circumferential yarn reaches the core mold position, the fixed guide rod extends to fix the six-way yarn forming part, and the yarn tension adaptive control part adjusts the tension to complete the overall six-way yarn implantation work;

[0016] The circumferential yarn track telescopic unit adopts a two-stage control synchronous scheme. The upper cylinder is used to control the sub-track segment. The guide rail stores the sub-track segment in the sleeve through the telescopic rod. At the same time, the lower cylinder contracts to shrink the global circumferential yarn track telescopic unit to the lower part of the chassis to avoid equipment interference with the circumferential RGV tension adaptive yarn supply start-stop control device when the front five-way yarn is working;

[0017] (4) Repeat steps (1)-(3) until all circumferential yarns are implanted in conjunction with the 1-5 yarns.

[0018] Beneficial effects: Compared with the prior art, the present invention uses the principle that the rotation of the lead screw can drive the first support and the second support to move closer or farther away, converting the approach or distance of the first support and the second support into the lifting and lowering of the lock tongue pressure plate, and by setting a lifting and rotating device, the lifting and lowering of the lock tongue pressure plate is converted into a rotation action to form locking or unlocking between the lock tongue pressure plate and the two blocks. In the present invention, there is no need to use a spring as a self-locking mechanism, but the self-locking property of the lead screw and the lead screw nut itself is used to maintain the locking posture. The self-locking structure is rigid self-locking and is less affected by external forces or vehicle bumps. At the same time, the device of the present invention only needs one driver to realize the composite action of lifting and rotating the lock tongue pressure plate, which has a simple structure and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a partial schematic diagram of the circumferential yarn implanting device in the present invention.

[0020] Figure 2It is a schematic diagram of a circular track formed by a circumferential RGV tension adaptive yarn supply start-stop device and a circumferential yarn track telescopic device.

[0021] Figure 3 It is a schematic diagram of the circumferential RGV tension adaptive yarn supply device located on the first track unit.

[0022] Figure 4 It is a three-dimensional diagram of the circumferential RGV tension adaptive yarn supply device.

[0023] Figure 5 It is a three-dimensional diagram of the circumferential RGV tension adaptive yarn supply start and stop device.

[0024] Figure 6 It is a schematic diagram of the cooperation between the U-groove pulley and the first track unit.

[0025] Figure 7 It is a stereoscopic diagram of the circumferential yarn track telescopic device.

[0026] Figure 8 It is a cross-sectional view of the second track unit in the circumferential yarn track telescopic device in the open state.

[0027] Fig. 9 It is a cross-sectional view of the second track unit in the circumferential yarn track telescopic device in the contracted state.

[0028] Fig.10 It is a partial schematic diagram of the circumferential yarn implanting device when the second track unit is in the retracted state.

[0029] Fig.11 yes Figure 3 Side view of.

[0030] In the figure:

[0031] 1: Guide rail bracket; 2: Charging plug assembly; 3: Linear guide rail; 4: Cylinder; 5: Guide rail mounting plate; 6: Cylinder fixing bracket; 7: Circumferential RGV tension adaptive yarn supply start and stop device; 8: Pressure block; 9: Compression spring; 10: Micro switch; 11: Constant tension coil spring; 12: Guide wheel mounting rod; 13: U-groove pulley; 14: Fixed ring; 15: Yarn tube; 16: Device drive unit; 17: Push button switch; 18: Micro cam follower; 19: Circumferential RGV tension adaptive yarn supply device; 20: Flexible extension track (second track unit); 21: Guide rail storage groove; 22: Telescopic cylinder; 23: Circumferential yarn track telescopic device; 24: Chassis; 25: First track unit; 26: Sleeve; 27: Telescopic rod; 28: Slider. DETAILED DESCRIPTION

[0032] The present invention discloses a circumferential yarn implantation device based on a composite material three-dimensional braiding device. Figures 1 to 7As shown, the device includes a circular bottom plate 24 ( Figure 1 Only the chassis 24 is intercepted in the figure), several circumferential RGV tension adaptive yarn supply start and stop devices 7 installed on the chassis 24, several circumferential yarn track telescopic devices 23 installed on the chassis, and circumferential RGV tension adaptive yarn supply devices 19. Figure 2 As shown, the plurality of circumferential RGV tension adaptive yarn supply start-stop devices 7 are evenly installed around the annular chassis 24, and a plurality of circumferential yarn track retractable devices 23 are arranged between two adjacent circumferential RGV tension adaptive yarn supply start-stop devices 7. The circumferential RGV tension adaptive yarn supply start-stop device 7 extends from the outside to the inside on the chassis 24, and the plurality of circumferential yarn track retractable devices 23 also extend from the outside to the inside on the chassis. The inner end of the circumferential RGV tension adaptive yarn supply start-stop device 7 is provided with a first track unit 25 located on the same circumference, and the inner end of the circumferential yarn track retractable device is provided with a retractable or openable second track unit 20. As shown Figure 1 and Figure 8 As shown, when the second track units 20 in all the circumferential yarn track telescopic devices are opened, all the first track units 25 and the second track units 20 are connected end to end to form a complete circular track (the formed circular track is shown in FIG. Figure 2 As shown in FIG. 1 ), the circumferential RGV tension adaptive yarn supply device 19 is installed on the circular track and moves along the circular track. Figure 6 As shown, the circumferential RGV tension adaptive yarn supply device 19 is provided with a U-groove pulley 13 that cooperates with the circular track. The upper and lower edges of the first track unit and the second track unit are provided with steps that cooperate with the U-groove pulley 13 to position the adaptive yarn supply device 19 and the circular track in the centripetal direction.

[0033] The circumferential yarn track telescopic device 23 includes a sleeve 26, a telescopic rod 27 located in the sleeve 26, and a second track unit 20 installed at the front end of the telescopic rod 27. The second track unit includes two sub-track segments, and the same end of the two sub-track segments is hinged to the front end of the telescopic rod 27. Fig. 9 and Fig.10 As shown, when the telescopic rod 27 is retracted, the two sub-track segments are contracted side by side in the sleeve 26; when the telescopic rod 27 is extended, the two sub-track segments open outward to form an arc track, which is a component of the circular track. The sub-track segment is hinged to the front end of the telescopic rod 27 through a spring hinge. When the two sub-track segments are contracted side by side in the sleeve 26, the spring of the spring hinge is in a compressed state. When the two sub-track segments extend out of the sleeve, the elastic force of the spring is released to make the two sub-track segments quickly open to both sides to form an arc track.

[0034] like Figure 3 , Figure 5 , Fig.11 As shown, the circumferential RGV tension adaptive yarn supply start-stop device includes a cylinder 4, a linear guide rail 3, and a slider 28 located on the linear guide rail. The output end connecting rod of the cylinder 4 is connected to the slider 28, and the slider 28 is connected to the first track unit 25. When the circumferential RGV tension adaptive yarn supply device 19 moves onto the first track unit 25, the cylinder 4 can drive the circumferential RGV tension adaptive yarn supply device 19 and the first track unit 25 to move on the linear guide rail 3.

[0035] The circumferential yarn implantation method using the circumferential yarn implantation device specifically comprises the following steps:

[0036] (1) The circumferential yarn track telescopic unit 23 extends the flexible extension guide rail (i.e., sub-track segment) 20 through the telescopic rod, and the first track segment and the second track segment are spliced, and the global structure becomes a circular track parallel to the circular chassis;

[0037] (2) The circumferential RGV tension adaptive yarn supply device 19 is started. While adaptively adjusting the yarn tension range, the device moves circumferentially along the spliced ​​circular track, carrying the yarn around the 1-5 yarn layers.

[0038] (3) After the circumferential RGV tension-adaptive yarn supply device 19 completes the whole circumferential yarn implantation work around the circular track, when it returns to the RGV tension-adaptive yarn supply start-stop control device 7, the Hall switch on the upper part of the start-stop device detects the positioning magnet at the bottom of the device. At the same time, the needle cylinder at the bottom of the supply device extends and contacts the key switch 17 at the bottom of the device, thereby stopping the operation of the tension-adaptive yarn supply device. At the same time, the yarn is picked up by relying on the densification mechanism (not shown in the present application). When the circumferential yarn reaches the core mold position, the fixed guide rod extends to fix the six-way yarn forming part, and the yarn tension adaptive control part adjusts the tension to complete the overall six-way yarn implantation work.

[0039] The circumferential yarn track telescopic unit adopts a two-stage control synchronous scheme. The upper end cylinder is used to control the flexible extension guide rail 20, and controls the telescopic rod to store the flexible extension guide rail 20 in the sleeve; the cylinder 4 also retracts the circumferential RGV tension adaptive yarn supply device 19 and the first track unit 25 toward the direction of the cylinder 4 to avoid equipment interference with the circumferential RGV tension adaptive yarn supply start and stop control device 7 when the front five-way yarn is working.

[0040] (4) Repeat steps (1)-(3) until all circumferential yarns are implanted in conjunction with the 1-5 yarns.

[0041] The method of the present invention is used to automatically implant the circumferential yarn, thereby improving the implantation efficiency and automation level of the yarn and reducing the loss caused by friction between the yarns during the implantation of the yarn.

[0042] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

[0043] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A circumferential yarn implantation device based on composite material three-dimensional braiding equipment, characterized in that: The invention comprises a circular chassis, a plurality of circumferential RGV tension adaptive yarn supply start-stop devices (7) installed on the chassis, a plurality of circumferential yarn track telescopic devices (23) installed on the chassis, and a circumferential RGV tension adaptive yarn supply device (19); the plurality of circumferential RGV tension adaptive yarn supply start-stop devices are evenly installed around the circular chassis, and a plurality of circumferential yarn track telescopic devices are arranged between two adjacent circumferential RGV tension adaptive yarn supply start-stop devices; the circumferential RGV tension adaptive yarn supply start-stop devices extend from the outside to the inside on the chassis, A plurality of circumferential yarn track telescopic devices also extend from outside to inside on the chassis, and a first track unit located on the same circumference is arranged at the inner end of the circumferential RGV tension adaptive yarn supply start-stop device, and a retractable or openable second track unit (20) is arranged at the inner end of the circumferential yarn track telescopic device; when the second track units in all the circumferential yarn track telescopic devices are opened, all the first track units and the second track units are connected end to end to form a complete circular track; the circumferential RGV tension adaptive yarn supply device is installed on the circular track and moves along the circular track; The circumferential yarn track telescopic device includes a sleeve, a telescopic rod located in the sleeve, and a second track unit installed at the front end of the telescopic rod. The second track unit includes two sub-track segments, and the same end of the two sub-track segments is hinged to the front end of the telescopic rod. When the telescopic rod is retracted, the two sub-track segments are retracted side by side in the sleeve; when the telescopic rod is extended, the two sub-track segments open outward to form an arc track, which serves as a component of the circular track.

2. The circumferential yarn implanting device according to claim 1, characterized in that: The circumferential RGV tension adaptive yarn supply device (19) comprises a pressure block, a compression spring, a micro switch, a constant tension coil spring, a guide wheel mounting rod, a U-groove pulley, a fixing ring, a yarn tube, a device drive unit, a key switch, and a micro cam follower.

3. The circumferential yarn implanting device according to claim 2, characterized in that: The circumferential RGV tension adaptive yarn supply device (19) is provided with a U-groove pulley that cooperates with the circular track, and the upper edge and lower edge of the first track unit and the second track unit are both provided with steps that cooperate with the U-groove pulley so that the adaptive yarn supply device (19) and the circular track are positioned in a centripetal direction.

4. The circumferential yarn implanting device according to claim 3, characterized in that: The circumferential RGV tension adaptive yarn supply start-stop device comprises a guide rail bracket, a charging plug assembly, a linear guide rail, a cylinder, a guide rail mounting plate, and a cylinder fixing bracket.

5. A circumferential yarn implantation method using the circumferential yarn implantation device according to claim 4, characterized in that: The steps include: (1) The circumferential yarn track telescopic device (23) extends the sub-track segment through the telescopic rod, and the first track segment and the second track segment are spliced ​​together, and the global structure becomes a circular track parallel to the circular chassis; (2) The circumferential RGV tension adaptive yarn supply device (19) is started, and while adaptively adjusting the yarn tension range, the device moves circumferentially along the spliced ​​circular track, carrying the yarn around the 1-5 yarn layers; (3) After the circumferential RGV tension-adaptive yarn supply device (19) completes the whole circumferential yarn implantation work around the circular track, when it returns to the RGV tension-adaptive yarn supply start-stop control device (7), the Hall switch on the upper part of the start-stop device detects the positioning magnet at the bottom of the device. At the same time, the needle cylinder at the bottom of the supply device extends and contacts the key switch (17) at the bottom of the device, thereby stopping the operation of the tension-adaptive yarn supply device; at the same time, the yarn is picked up by relying on the densification mechanism. When the circumferential yarn reaches the core mold position, the fixed guide rod extends to fix the six-way yarn forming part, and the yarn tension adaptive control part adjusts the tension to complete the overall six-way yarn implantation work; The circumferential yarn track retracting device adopts a two-stage control synchronous scheme, the upper end cylinder is used to control the second track unit (20), the second track unit (20) is stored in the sleeve through the spring hinge, and the cylinder (4) also retracts the circumferential RGV tension adaptive yarn supply device (19) and the first track unit (25) towards the cylinder (4), so as to avoid equipment interference with the circumferential RGV tension adaptive yarn supply start-stop control device (7) when the front five-way yarn is working; (4) Repeat steps (1) to (3) until all circumferential yarns are implanted in conjunction with the 1-5 yarns.

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