A high-performance fiber preform loom weft selection and insertion device and method

Abstract

The present invention provides a high-performance fiber preform loom weft selection and insertion device and method, belonging to the field of textile technology, including a rotating disk, a plurality of weft yarn fixing components are arranged on the edge of the rotating disk, the weft yarn fixing component includes a clamp fixing frame, a first clamp and a second clamp, the first clamp and the second clamp are installed at intervals on the platforms at both ends of the clamp fixing frame, the center position of the clamp fixing frame is installed on the output end of the weft yarn rotating motor, and the weft yarn rotating motor is fixed on the rotating disk. According to the present invention, weft yarns of various numbers can work in sequence on the same rotating disk to realize the weft selection process; the weft yarn fixing component of the present invention includes two upper and lower clamps that cooperate with each other, which can constrain different numbers of weft yarns into one strand to avoid the problem of weft leakage during weft insertion, and the first clamp and the second clamp on the working position will exchange positions once each time the weft is inserted and cut. At the same time, the weft yarn after the cut will be clamped again to realize the weft insertion action cycle.

Description

Technical Field

[0001] The invention belongs to the field of textile technology, and in particular relates to a weft selection and insertion device and method for a high-performance fiber preform loom. Background Art

[0002] High-performance fiber preform weaving is a new type of weaving technology. It is an overall structure formed by yarn bundles distributed in two directions perpendicular to each other in the warp and weft directions in three-dimensional space and interwoven with each other. Composite components made of reinforcements have many advantages such as light weight, high strength, and excellent mechanical properties. It has been widely used in many fields such as aerospace, national defense and military industry, transportation, energy, etc., and is constantly expanding into the civilian field.

[0003] During the weaving process, the warp yarn bundles are drawn out from the warp creel, pass through the heald eyelets of the heald connected to the harness according to a certain pattern, and then pass through the reed and are clamped by the clamp; the opening device controls the lifting and lowering of the heald eyelets so that the warp yarn bundles form multiple sheds; the weft insertion device leads the weft yarn through the shed; after the weft insertion is completed, the reed pushes the weft yarn to the cloth fell; the traction mechanism leads the formed preform out, forming a manufacturing cycle.

[0004] When forming and manufacturing high-thickness three-dimensional woven preforms, the number of the introduced weft yarn bundles will change with the thickness of the fabric during the weaving process. Currently, weft yarns of different numbers are composed of different numbers of yarns. When the number of weft yarns is large, the diameter of the entire weft yarn will become larger, and ordinary weft insertion sword heads cannot meet the clamping requirements of large-diameter weft yarns. In addition, when the number of weft yarns increases, the traditional weft insertion device will have the problem of weft leakage when hooking the weft yarn for weft insertion. Summary of the Invention

[0005] The problem to be solved by the present invention is to provide a weft selection and weft insertion device and method for a high-performance fiber preform loom.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a high-performance fiber preform loom weft selection and insertion device, including a rotating disk, a plurality of weft yarn fixing components are arranged on the edge of the rotating disk, and the weft yarn fixing components include a chuck fixing frame, a first chuck and a second chuck, the first chuck and the second chuck are installed at intervals on the platforms at both ends of the chuck fixing frame, the center position of the chuck fixing frame is installed at the output end of the weft yarn rotating motor, and the weft yarn rotating motor is fixed on the rotating disk.

[0007] The first chuck and the second chuck have the same structure, and both the first chuck and the second chuck include a chuck frame, one end of the chuck frame is hinged with a single-claw clip, and the other end of the chuck frame is hinged with a double-claw clip body, the double-claw clip body extends out of the chuck frame, and the double-claw clip is hinged on the double-claw clip body, the single-claw clip and the double-claw clip are embedded in each other, the top of the single-claw clip is lower than the top of the double-claw clip, the side of the single-claw clip away from the double-claw clip is set to a convex outer arc surface, and the side of the double-claw clip facing the single-claw clip is set to a concave inner arc surface, the outer arc surface of the single-claw clip cooperates with the inner arc surface of the double-claw clip to facilitate the sliding of the yarn.

[0008] Furthermore, a rotating motor drives the rotating disk to rotate, and the rotating motor is installed on a fixed base.

[0009] Furthermore, a yarn guide rod is installed adjacent to each first chuck; a plurality of yarn arrangement rods are arranged around the center of the rotating disk, and the yarn arrangement rods are evenly distributed in a ring shape and are used to arrange the weft yarns so that weft yarns of different numbers do not interfere with each other.

[0010] Furthermore, the weft yarn fixing components are evenly distributed at semicircular positions on one side of the rotating disk.

[0011] Furthermore, the clamp fixing frame is concave-shaped.

[0012] Furthermore, the position at three o'clock on the rotating disk is the working position, the chuck fixing frame at the working position is vertically arranged, the first chuck of the working position is located directly above the second chuck, and the weft yarn clamped by the first chuck and the second chuck of the working position is in the vertical direction.

[0013] Furthermore, a laterally movable weft insertion chuck is provided between the first chuck and the second chuck of the working position, the position between the first chuck and the second chuck is the clamping position of the weft insertion chuck, and the other end position of the laterally movable weft insertion chuck is the initial position of the weft insertion chuck, and the distance between the initial position and the clamping position is the fabric width.

[0014] Furthermore, a weft cutting device is provided between the working position and the initial position of the weft insertion chuck.

[0015] Furthermore, the number of weft yarn fixing assemblies to be installed depends on the type of weft yarn numbers.

[0016] Furthermore, the first chuck, the second chuck and the weft insertion chuck are all pneumatic chucks.

[0017] A high-performance fiber preform weft selection and insertion method for a loom comprises the following steps:

[0018] S1, introducing the weft yarn into the first chuck and the second chuck of the weft yarn fixing assembly, wherein the first chuck and the second chuck clamp and fix the weft yarn;

[0019] S2, the weft yarn fixing assembly for clamping the weft yarn rotates to the working position, the weft insertion chuck in the open state moves from the initial position to the clamping position between the first chuck and the second chuck and clamps the weft yarn, and then the first chuck and the second chuck are released, at this time the weft yarn is still confined in the first chuck;

[0020] S3, the weft insertion chuck retracts horizontally to the initial position, at which point the first chuck clamps the weft yarn and the weft cutting device cuts the weft yarn;

[0021] S4: After the weft yarn is cut, the first chuck is in a clamped state and the second chuck is in an open state. The weft yarn rotation motor drives the chuck fixing frame to rotate 180° toward the double-claw clamping piece. During the rotation process, the weft yarn contacts the single-claw clamping piece of the second chuck and slides into the second chuck along the outer arc surface of the single-claw clamping piece;

[0022] S5. After the rotation is completed, the second chuck is located directly above the first chuck and clamps the weft yarn, completing one weft insertion action.

[0023] Repeat steps S2 to S5 to achieve a sequential cycle of weft insertion actions.

[0024] In step S1, initially, the weft yarn is drawn out from the yarn rack and arranged into the yarn guide hole of the yarn arrangement rod through the tensioner. The weft yarn is drawn from the yarn guide hole of the yarn arrangement rod to the yarn guide hole of the corresponding yarn guide rod, and then introduced into the weft yarn fixing assembly.

[0025] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0026] The weft yarn fixing components of the present invention are all installed on the rotating disk, and the number of weft yarn fixing components can be adjusted according to the requirements of the weft yarn number type. When weft yarns of various numbers are needed and multiple weft yarn fixing components are installed, the weft yarn fixing components to be inserted can be rotated to the working position for work according to textile needs. Weft yarns of various numbers can work in sequence on the same rotating disk to realize the weft selection process, which simplifies the work process and improves work efficiency.

[0027] The weft yarn fixing assembly of the present invention comprises two upper and lower clamps that cooperate with each other, which are set as a first clamp and a second clamp, and can constrain different numbers of weft yarns into one strand, thereby avoiding the problem of weft leakage during weft insertion.

[0028] The weft yarn fixing assembly of the present invention can interchange the positions of the first clamp and the second clamp by rotating. Each time the weft is inserted and cut, the first clamp and the second clamp on the working position will interchange positions. At the same time, the weft yarn after cutting will be clamped again, thus realizing the weft insertion action cycle.

[0029] The first chuck and the second chuck of the present invention have the same structure, both including a single-claw clamp and a double-claw clamp that are embedded in each other. Since the top of the single-claw clamp is lower than the top of the double-claw clamp, and the side of the single-claw clamp away from the double-claw clamp is set as a convex outer arc surface, and the side of the double-claw clamp facing the single-claw clamp is set as a concave inner arc surface, therefore, the outer arc surface of the single-claw clamp cooperates with the inner arc surface of the double-claw clamp, so that the yarn can easily slide into the chuck when the weft yarn fixing component rotates, and then be clamped again, realizing a fully automatic weft insertion cycle.

[0030] The invention no longer uses ordinary weft insertion rapiers and chucks, but adopts pneumatic chucks to clamp the weft yarn, thereby ensuring the success rate of weft insertion. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be described in detail below with reference to the accompanying drawings and in combination with examples, and the advantages and implementation modes of the present invention will become more apparent. The contents shown in the accompanying drawings are only used to illustrate the present invention and do not constitute any limitation to the present invention. In the accompanying drawings:

[0032] Figure 1 It is a structural schematic diagram of the present invention;

[0033] Figure 2 It is a structural schematic diagram of the rotating disk of the present invention;

[0034] Figure 3 is a side view of the rotating disk of the present invention;

[0035] Figure 4 2 is a schematic structural diagram of the weft yarn fixing assembly of the present invention;

[0036] Figure 5 It is a structural schematic diagram of the first chuck of the present invention.

[0037] In the picture:

[0038] 1. Fixed base; 2. Rotating motor; 3. Rotating disk; 4. Weft fixing assembly; 5. Yarn guide rod; 6. Yarn arrangement rod; 7. Weft insertion chuck; 8. Weft cutting device;

[0039] 40. First chuck; 41. Second chuck; 42. Chuck fixing bracket; 43. Flange; 44. Weft yarn rotating motor;

[0040] 401, single-claw clamp; 402, double-claw clamp; 403, chuck frame; 404, double-claw clamp body. DETAILED DESCRIPTION

[0041] The following embodiments are only used to more clearly illustrate the technical solutions of the present invention so that those skilled in the art can better understand and utilize the present invention, but are not intended to limit the scope of protection of the present invention.

[0042] like Figures 1 to 5 As shown, the present invention provides a high-performance fiber preform loom weft selection and insertion device, comprising a fixed base 1, a rotating motor 2, a rotating disk 3, a weft yarn fixing assembly 4, a yarn guide rod 5, a yarn arrangement rod 6, a weft insertion chuck 7 and a weft cutting device 8.

[0043] The rotating motor 2 is installed on the fixed base 1, and the rotating motor 2 drives the rotating disk 3 to rotate. Several weft yarn fixing components 4 are provided on the edge of the rotating disk 3. The weft yarn fixing components 4 include a first chuck 40 and a second chuck 41. The first chuck 40 and the second chuck 41 are installed at intervals on the platforms at both ends of the chuck fixing frame 42. The center position of the chuck fixing frame 42 is installed on the flange 43 at the output end of the weft yarn rotating motor 44, and the weft yarn rotating motor 44 is fixed on the rotating disk 3.

[0044] The first chuck 40 and the second chuck 41 have the same structure. The first chuck 40 and the second chuck 41 both include a chuck frame 403, one end of the chuck frame 403 is hinged with a single-claw clip 401, and the other end of the chuck frame 403 is hinged with a double-claw clamp body 404, the double-claw clamp body 404 extends out of the chuck frame 403, and the double-claw clamp body 404 is hinged with a double-claw clamp 402. The single-claw clamp 401 and the double-claw clamp 402 are interlocked with each other, and the top of the single-claw clamp 401 is lower than the top of the double-claw clamp 402. The side of the single-claw clamp 401 away from the double-claw clamp 402 is set to a convex outer arc surface, and the side of the double-claw clamp 402 facing the single-claw clamp 401 is set to a concave inner arc surface. The outer arc surface of the single-claw clamp 401 cooperates with the inner arc surface of the double-claw clamp 402 to facilitate the sliding of the yarn.

[0045] A corresponding yarn guide rod 5 is installed adjacent to each first chuck 40; a plurality of yarn arrangement rods 6 are arranged around the center of the rotating disk 3, and the yarn arrangement rods 6 are evenly distributed in a ring shape, and are used to arrange the weft yarns so that weft yarns of different numbers do not interfere with each other.

[0046] The weft yarn fixing components 4 are evenly distributed on the semicircular position of one side of the rotating disk 3 , that is, a plurality of weft yarn fixing components 4 are evenly distributed on the semicircular position of the rotating disk 3 .

[0047] The clamp fixing frame 42 is in a concave shape.

[0048] The weft yarns clamped by the first clamp 40 and the second clamp 41 are arranged along the tangential position direction of the rotating disk 3 .

[0049] Among them, the position at three o'clock on the rotating disk 3 is the working position, and the chuck fixing frame 42 at the working position is vertically arranged. At this time, the first chuck 40 of the working position is located directly above the second chuck 41. At this time, the weft yarn clamped by the first chuck 40 and the second chuck 41 of the working position is in the vertical direction.

[0050] Among them, a laterally movable weft insertion chuck 7 is arranged between the first chuck 40 and the second chuck 41 of the working position. The position between the first chuck 40 and the second chuck 41 is the clamping position of the weft insertion chuck 7, and the other end position of the laterally moving is the initial position of the weft insertion chuck 7. The distance between the initial position and the clamping position is the fabric width.

[0051] A weft cutting device 8 is provided between the working position and the initial position of the weft insertion chuck 7 .

[0052] Wherein, the installation quantity of weft yarn fixing assembly 4 depends on the kind of weft yarn number.Just several weft yarn fixing assemblies 4 are installed according to the weft yarn of several numbers.

[0053] The first chuck 40, the second chuck 41 and the weft insertion chuck 7 are all pneumatic chucks.

[0054] A high-performance fiber preform weft selection and insertion method for a loom comprises the following steps:

[0055] S1. Initially, the weft yarn is drawn out from the creel and arranged into the yarn guide hole of the yarn arrangement rod 6 through the tensioner. The weft yarn is then drawn from the yarn guide hole of the yarn arrangement rod 6 to the yarn guide hole of the corresponding yarn guide rod 5, and then sequentially introduced into the first clamp 40 and the second clamp 41 of the weft yarn fixing assembly 4. The first clamp 40 and the second clamp 41 clamp the weft yarn;

[0056] S2, the weft fixing assembly 4 that clamps the weft yarn rotates to the working position, and the weft insertion chuck 7 in the open state moves from the initial position to the clamping position between the first chuck 40 and the second chuck 41 and clamps the weft yarn, and then the first chuck 40 and the second chuck 41 are released. At this time, the weft yarn is still confined in the first chuck 40;

[0057] S3, the weft insertion chuck 7 retracts laterally to the initial position, at which point the first chuck 40 clamps the weft yarn, and the weft cutting device 8 operates to cut the weft yarn;

[0058] S4, after the weft yarn is cut, the first chuck 40 is in the clamping state, the second chuck 41 is in the open state, and the weft yarn rotating motor 44 drives the chuck fixing frame 42 to rotate 180 degrees toward the double-claw clamping piece 402 ( Figure 1 The middle chuck fixing frame 42 rotates 180° toward the double-claw clamping piece 402 (i.e., rotates 180° clockwise). During the rotation, the weft yarn contacts the single-claw clamping piece 401 of the second chuck 41 and slides into the second chuck 41 along the outer arc surface.

[0059] S5. After the rotation is completed, the second clamping head 41 is located directly above the first clamping head 40 and clamps the weft yarn, completing one weft insertion operation.

[0060] Repeat steps S2 to S5 to realize the sequential cycle of the weft insertion action of the same weft yarn fixing assembly 4.

[0061] The next weft insertion operation is similar, except that the weft rotation motor 44 in the weft fixing assembly 4 still drives the chuck fixing frame 42 to rotate 180° toward the double-claw clamp 402. Since the second chuck 41 is already above the first chuck 40, and the positions of the double-claw clamp 402 and the single-claw clamp 401 have been swapped in the previous 180° rotation, the chuck fixing frame 42 rotates 180° toward the double-claw clamp 402 in this rotation, which is a counterclockwise rotation of 180°.

[0062] When weft yarns of various sizes are required and multiple weft yarn fixing assemblies 4 are installed, the weft yarn fixing assembly 4 to be inserted is rotated to the working position for operation according to the textile needs.

[0063] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of this patent.

Claims

1. A method for weft selection and insertion of a high-performance fiber preform loom, characterized by: The invention also provides a plurality of weft fixing components, and the plurality of weft fixing components are connected to the chuck fixing frame, wherein the plurality of weft fixing components are connected to the chuck fixing frame by the first and second chucks. The plurality of weft fixing components are connected to the chuck fixing frame by the first and second chucks. The plurality of weft fixing components are connected to the chuck fixing frame by the second and second chucks. The plurality of weft fixing components are connected to the chuck fixing frame by the first and second chucks. The plurality of weft fixing components are connected to the chuck fixing frame by the first and second chucks. The plurality of weft fixing components are connected to the chuck fixing frame by the second and second chucks. The plurality of weft fixing components are connected to the chuck fixing frame by the first and second chucks. At the top of the piece, the single-claw clamp is set to a convex outer arc surface on the side away from the double-claw clamp, and the double-claw clamp is set to a concave inner arc surface on the side facing the single-claw clamp; the position at three o'clock on the rotating disk is the working position, and the clamp fixing frame located at the working position is vertically arranged, the first clamp of the working position is located directly above the second clamp, and the weft yarn clamped by the first clamp and the second clamp of the working position is in a vertical direction; a transversely movable weft insertion clamp is provided between the first clamp and the second clamp of the working position, the position between the first clamp and the second clamp is the clamping position of the weft insertion clamp, and the weft insertion clamp moves transversely from the initial position to the clamping position, and the distance between the initial position and the clamping position is the fabric width; a weft cutting device is provided between the working position and the initial position of the weft insertion clamp; The specific steps include: S1, introducing the weft yarn into the first chuck and the second chuck of the weft yarn fixing assembly, wherein the first chuck and the second chuck clamp and fix the weft yarn; S2, the weft yarn fixing assembly for clamping the weft yarn rotates to the working position, the weft insertion chuck in the open state moves from the initial position to the clamping position between the first chuck and the second chuck and clamps the weft yarn, and then the first chuck and the second chuck are released, at this time the weft yarn is still confined in the first chuck; S3, the weft insertion chuck retracts horizontally to the initial position, at which point the first chuck clamps the weft yarn and the weft cutting device cuts the weft yarn; S4: After the weft yarn is cut, the first chuck is in a clamped state and the second chuck is in an open state. The weft yarn rotation motor drives the chuck fixing frame to rotate 180° toward the double-claw clamping piece. During the rotation process, the weft yarn contacts the single-claw clamping piece of the second chuck and slides into the second chuck along the outer arc surface of the single-claw clamping piece; S5. After the rotation is completed, the second chuck is located directly above the first chuck and clamps the weft yarn, completing the weft insertion action.

2. The weft selection and insertion method for a high-performance fiber preform loom according to claim 1, characterized in that: The rotary disk is driven to rotate by a rotary motor, which is mounted on a fixed base. A yarn guide rod is mounted adjacent to each of the first chucks. A plurality of yarn guide rods are arranged around the center of the rotary disk.

3. The weft selection and insertion method for a high-performance fiber preform loom according to claim 1, characterized in that: The weft yarn fixing components are evenly distributed at semicircular positions on one side of the rotating disk.

4. The weft selection and insertion method for a high-performance fiber preform loom according to claim 1, characterized in that: The first chuck, the second chuck and the weft insertion chuck are all pneumatic chucks.

5. The weft selection and insertion method for a high-performance fiber preform loom according to claim 1, characterized in that: In step S1, initially, the weft yarn is drawn out from the yarn rack and arranged into the yarn guide hole of the yarn arrangement rod through the tensioner. The weft yarn is drawn from the yarn guide hole of the yarn arrangement rod to the yarn guide hole of the corresponding yarn guide rod, and then introduced into the weft yarn fixing assembly.

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