Plane circumferential fabric, plane fabric and production method

Abstract

The production method comprises the following steps that the plane circumferential fabric to be woven and formed and the plane fabric to be woven and formed are pre-folded into n fan-shaped and rectangular fabrics to be woven and formed, the angles of the n fan-shaped fabrics to be woven and formed are a1, a2... an, and a1 + a2 +... + a n = 360 degrees, or the angles of the n fan-shaped fabrics to be woven and formed are a1, a2..., an, a1 + a2 +... + a n = 360 degrees; the length sizes of the n rectangular fabrics to be woven and formed are the same or different, n is an integer greater than or equal to 2, and m is an integer greater than or equal to 1; presetting and arranging warp yarns; weft insertion is conducted in sequence according to the designed weft insertion mode, and the weft yarn and the preset warp yarn are interwoven to complete weaving; the n pieces of woven fan-shaped fabric and rectangular fabric are subjected to plane unfolding, the plane annular fabric and the plane fabric meeting the requirements are woven, compared with the prior art, the plane annular fabric and the plane fabric are rapidly woven, the diversity of fabric patterns is increased, and meanwhile the problem that the equipment capacity is limited is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of textiles, and in particular to a planar circumferential fabric, a planar fabric and a production method thereof. Background Art

[0002] A planar circumferential fabric is a circular fabric woven based on planar polar coordinates. Its radially woven yarns are arranged in polar coordinates, and the circumferentially woven yarns are wound along the circumferential direction. The structure of this fabric can be plain weave, twill weave or satin weave. Compared with traditional rectangular coordinate woven fabrics, planar circumferential fabrics do not require cutting of load-bearing fibers, can better maintain the integrity of the fibers, thereby improving the dimensional stability and mechanical properties of the fabric. Planar circumferential fabrics are often used as reinforcements for high-performance composite materials, such as ceramic matrix composites, carbon fiber reinforced silicon carbide matrix composites and resin matrix composites, etc. Their excellent mechanical properties make them have important application values in high-tech fields such as aerospace and national defense.

[0003] A planar fabric refers to a two-dimensional structured fabric formed by the interweaving of warp yarns and weft yarns, and its surface is basically in the same plane, forming a flat fabric surface structure.

[0004] In the prior art, it is possible to weave planar fabrics or planar circumferential fabrics with smaller sizes. However, when it comes to planar fabrics or planar circumferential fabrics with larger sizes, there are the following problems. Firstly, the weaving process occupies a large amount of space, which will cause the problem of limited equipment capacity. Secondly, the patterns formed by weaving are single, and the weaving process is also slower.

[0005] Based on this, a planar circumferential fabric, a planar fabric and a production method are designed. Summary of the Invention

[0006] The present invention is to overcome the above-mentioned defects in the prior art, and provides a planar circumferential fabric, a planar fabric and a production method thereof. On the one hand, while quickly weaving the planar circumferential fabric and the planar fabric, it increases the diversity of the patterns of the planar fabric and the planar circumferential fabric. On the other hand, it avoids the problem of limited capacity of the weaving equipment.

[0007] In order to achieve the above purpose, the technical solution adopted by the present invention is: a production method of a planar circumferential fabric, including the following steps, Step 1: Pre-fold the planar circumferential fabric to be woven and formed into n fan-shaped fabrics to be woven and formed. Each fan-shaped fabric to be woven and formed is a laminated fabric with m layers. The angles of the n fan-shaped fabrics to be woven and formed are a1, a2... an respectively, and a1 + a2 +... + an = 360°. n is an integer greater than or equal to 2, and m is an integer greater than or equal to 1; Step 2: Preset the arrangement of warp yarns. First, designate a main warp yarn as A. The main warp yarn A divides the fan-shaped fabric into two symmetric and equal-area sectors S1 and S2. Other warp yarns B1, B2,..., Bn are woven into the fabric at an angle along the length direction of the main warp yarn A in sequence. Step 3: Weave the weft yarns in sequence according to the designed weft insertion method. The weft yarns are interwoven with the preset warp yarns to complete the weaving. Step 4: Determine whether operations such as adding or subtracting yarns and adding or subtracting layers are required at the corresponding positions according to the size requirements of the fabric profiling plane. If required, perform the corresponding operations. Step 5: Repeat Step 3 and Step 4 until the required weaving length is reached. Step 6: Unfold the n woven fan-shaped fabrics in a plane to weave a planar circumferential fabric composed of n fan-shaped fabrics.

[0008] As a preferred embodiment of the present invention, in Step 1, the folding method of the m-layer laminated fabric is forward symmetric folding, reverse symmetric folding, or a combination of both.

[0009] As a preferred embodiment of the present invention, in Step 2, the warp yarns are arranged in a grouped and parallel form, that is, the warp yarns are divided into x groups, where x≥2, and the x groups of warp yarns are arranged in an up-and-down parallel form, and the number of layers of each group of warp yarns is y layers, where y≥1.

[0010] As a preferred embodiment of the present invention, the warp yarns B1, B2,..., Bn woven into the sector S1 and the warp yarns B1, B2,..., Bn woven into the sector S2 are in opposite directions.

[0011] As a preferred embodiment of the present invention, in Step 3, the weft yarns are introduced in a reciprocating continuous weft insertion method. The weft yarns are introduced layer by layer in each group of warp yarns in the order of warp yarn grouping. The weft insertion method is to first insert the weft yarns from the inner layer of the fabric to the outer layer, and then from the outer layer of the fabric to the inner layer to ensure the continuity of the weft yarns.

[0012] As a preferred embodiment of the present invention, in Step 3, for each circle of weaving, a new weft yarn is introduced, and the weft yarns are woven with the warp yarns from the inside to the outside in sequence.

[0013] A planar circumferential fabric is woven by using the described production method and is used as a turbine disk or a flange disk in the aerospace field, or as a generator blade in the energy field.

[0014] As a preferred embodiment of the present invention, it includes fan-shaped fabrics woven from n partitions. Adjacent fan-shaped fabrics have a demarcation line due to partition weaving. The angles of the n fan-shaped fabrics are a1, a2,..., an respectively, and a1 + a2 +... + an = 360°.

[0015] A method for producing a flat fabric, Step 1: pre-folding the planar fabric to be woven into n rectangular fabrics to be woven, each rectangular fabric to be woven is a sheet fabric with m layers, the n rectangular fabrics to be woven have the same or different lengths, n is an integer greater than or equal to 2, and m is an integer greater than or equal to 1; Step 2: Preset the warp yarn arrangement. First, mark a main warp yarn as A. The main warp yarn A divides the rectangular fabric into two symmetrical rectangles S1 and S2 with the same area. Other warp yarns B1, B2...Bn are woven in sequence along the length direction of the main warp yarn A. Step 3: Insert the weft in sequence according to the designed weft insertion method, and the weft yarn is interwoven with the preset warp yarn to complete the weaving; Step 4: Determine whether it is necessary to add or subtract yarn or add or subtract layers at the corresponding position according to the size requirements of the fabric profiling plane, and perform corresponding operations if necessary; Step 5: Repeat steps 3 and 4 until the desired length is reached; Step 6: Spread out the woven n rectangular fabrics in a plane to weave a planar fabric having n rectangular fabrics.

[0016] As a preferred embodiment of the present invention, the warp yarns in step 2 are arranged in groups and in parallel, that is, the warp yarns are divided into x groups, x≥2, and the x groups of warp yarns are arranged in parallel up and down, and each group of warp yarns has y layers, y≥1.

[0017] As a preferred embodiment of the present invention, the weft yarn is introduced in step 3 by a reciprocating continuous weft insertion method, and the weft yarn is reciprocatingly introduced into each group of warp yarns layer by layer according to the order of the warp yarn grouping. The weft insertion method is to first insert the weft from the inner layer of the fabric to the outer layer of the fabric, and then insert the weft from the outer layer of the fabric to the inner layer of the fabric, so as to ensure the continuity of the weft yarn.

[0018] A planar fabric is woven by adopting the production method, and comprises a rectangular fabric woven by n partitions.

[0019] The beneficial effects of the present invention are: 1. The present invention meets the molding requirements of two-dimensional planar hoop fabrics, can realize the diversification of fabric structures, and improve the designability of fabric structures to better meet the needs of different composite materials. The equipment can be used for fixed-length weaving as well as continuous weaving.

[0020] 2. The present invention adopts a grouped parallel warp yarn arrangement method and a reciprocating weft insertion method. By folding large-sized flat hoop fabrics and flat fabrics into smaller-sized fan-shaped fabrics and rectangular fabrics, it can achieve contour weaving of large-sized and large-diameter fabrics, solving the problem of equipment capacity limitation.

[0021] 3. In the present invention, the weft way also includes introducing a new weft every time a circle is woven. Any point on the weft insertion path is used as the weft yarn insertion point, and it is woven with the warp yarn layer by layer from the inside to the outside or from the outside to the inside, which is beneficial to weaving different tissues and wefts of different materials in the planar circumferential fabric, increasing the diversity of the fabric pattern and the strength of the fabric.

[0022] 4. The planar circumferential fabric and the planar fabric of the present invention are woven during the folding process. Therefore, after the warp and weft are woven, the excess warp yarn can be quickly trimmed along the fan-shaped boundary, improving the weaving efficiency of the planar circumferential fabric.

[0023] 5. Compared with the prior art, the present invention divides the planar fabric into several rectangular fabrics, which can realize the rapid weaving of several rectangular fabrics and improve the weaving speed and efficiency of the planar fabric.

[0024] 6. Compared with the prior art, the present invention divides the planar circumferential fabric into several fan-shaped fabrics, which can realize the rapid weaving of several fan-shaped fabrics and improve the weaving speed and efficiency of the planar circumferential fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the prior art; Figure 2 is a schematic structural diagram of Embodiment 1 of the planar circumferential fabric of the present invention; Figure 3 is one weft insertion way of Embodiment 1 of the planar circumferential fabric of the present invention; Figure 4 is the other weft insertion way of Embodiment 1 of the planar circumferential fabric of the present invention; Figure 5 is a folding schematic diagram of Embodiment 2 of the planar circumferential fabric of the present invention; Figure 6 is a schematic structural diagram of Embodiment 2 of the planar circumferential fabric of the present invention; Figure 7 is a folding schematic diagram of Embodiment 3 of the planar circumferential fabric of the present invention; Figure 8 is a schematic structural diagram of Embodiment 3 of the planar circumferential fabric of the present invention; Figure 9 is a schematic structural diagram of the planar fabric of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] The prior art is as Figure 1As shown, the planar hoop fabric has no clear partitions, and the fabric in each area cannot be woven in a partitioned manner, which results in a single pattern of the planar hoop fabric, increases the weaving space of the planar hoop fabric, and reduces the weaving efficiency of the planar hoop fabric.

[0028] Embodiment 1: A method for producing a planar hoop fabric, characterized in that it comprises the following steps: Step 1: pre-folding the planar hoop fabric to be woven into n fan-shaped fabrics to be woven, each fan-shaped fabric to be woven is a sheet fabric with m layers, and the angles of the n fan-shaped fabrics to be woven are a1, a2...an, a1+a2+...+an=360°, and n is an integer greater than or equal to 2; Step 2: Pre-arrange the warp yarns; Step 3: Insert the weft in sequence according to the designed weft insertion path, and the weft yarn is interwoven with the preset warp yarn to complete the weaving; Step 4: Determine whether it is necessary to add or subtract yarn or add or subtract layers at the corresponding position according to the size requirements of the fabric profiling plane, and perform corresponding operations if necessary; Step 5: Repeat steps 3 and 4 until the desired length is reached; Step 6: Spread out the woven n fan-shaped fabrics in a plane to weave a planar hoop fabric having n fan-shaped fabrics.

[0029] like Figure 2 As shown, m=1, and the angles of n fan-shaped fabrics are the same or different, for example but not limited to a1=a2=an, or a1≠a2≠an.

[0030] Since m=1, the planar hoop fabric in the first embodiment is a single layer.

[0031] The plane hoop fabric is subdivided into fan-shaped fabrics with 4 angles of 90° (a1=a2=a3=an), n=4, and then the boundary of each fan of the plane hoop fabric is determined. A main warp yarn is first marked as A in the center of each fan-shaped fabric. The main warp yarn A divides the fan into two symmetrical sectors S1 and S2 with the same area. The other warp yarns B1, B2...Bn are woven in sequence at an angle to the main warp yarn A along the length direction of the main warp yarn A. When encountering the boundary of the sector, the other warp yarns B1, B2...Bn are no longer woven with the weft yarns. At the same time, the warp lines B1, B2...Bn woven into S1 and S2 are in opposite directions, which makes it easy to distinguish the fan-shaped fabrics in different positions while increasing the diversity of the plane hoop fabric patterns. When there is a problem in the weaving of the plane hoop fabric, it is also conducive to visual identification and correction.

[0032] It should be noted that after each sector fabric is woven to form the above-mentioned planar circumferential fabric, the excess warp yarns need to be subtracted to form a beautiful finished product.

[0033] Moreover, the planar circumferential fabric can also be subdivided into sector fabrics with an angle of 72° (a1 = a2 = a3 = a4 = an) for each angle, where n = 5, and then the above weaving process is repeated. That is to say, the planar circumferential fabric can be divided into symmetric sectors or asymmetric sectors.

[0034] Moreover, the planar circumferential fabric can also be subdivided into sectors with different angles (a1 = a2 = 30, a3 = a4 = 150, or a1 = a2 = 30, a3 = 90, a4 = 60), and then the above weaving process is repeated. Generally speaking, the planar circumferential fabric can be divided into sector fabrics with the same angle or sector fabrics with different angles and woven.

[0035] Such as Figure 3 - Figure 4 As shown, the weft insertion method is specified. Figure 3 The weft in [reference] is continuous. The weft yarn goes from the bottommost layer to the topmost layer to form a closed-loop weft insertion path. It weaves with the warp layer by layer from the inside out or from the outside in, which improves the weaving efficiency of the planar circumferential fabric. Figure 4 In [reference], a new weft is introduced every time a circle is woven. The weft also weaves with the warp layer by layer from the inside out or from the outside in. Figure 4 The non - continuous weft in [reference] is beneficial to weaving different tissues and weft yarns of different materials into the planar circumferential fabric, increasing the diversity of the patterns and the strength of the planar circumferential fabric.

[0036] In the first embodiment, a single - layer planar circumferential fabric is folded and divided into n sector fabrics. The divided weaving of the n sector fabrics increases the diversity of the patterns of the planar circumferential fabric. Secondly, since the planar circumferential fabric is woven in a divided manner, it is also easy to identify problems in the weaving process of each area, which is convenient for timely correction and improves the weaving efficiency of the planar circumferential fabric.

[0037] In the second and third embodiments, m > 1. Therefore, the planar circumferential fabrics in the second and third embodiments are multi - layer.

[0038] Embodiment 2: A production method of a planar circumferential fabric, characterized by comprising the following steps: Step 1: Pre-fold the planar circumferential fabric to be woven and formed into n fan-shaped fabrics to be woven and formed. Each fan-shaped fabric to be woven and formed is a laminated fabric with m layers. The angles of the n fan-shaped fabrics to be woven and formed are a1, a2,..., an respectively, and a1 + a2 +... + an = 360°. n is an integer greater than or equal to 2; Step 2: Predetermine the arrangement of warp yarns; Step 3: Insert weft yarns successively according to the designed weft insertion path to ensure the continuity of the weft yarns and complete the weaving by interlacing with the pre-arranged warp yarns; Step 4: Determine whether operations such as adding or subtracting yarns and adding or subtracting layers are required at corresponding positions according to the dimensional requirements of the fabric profiling plane. If required, perform the corresponding operations; Step 5: Repeat Step 3 and Step 4 until the required weaving length is reached; Step 6: Unfold the n woven fan-shaped fabrics in a plane to weave a planar circumferential fabric with n fan-shaped fabrics.

[0039] In Step 1, the folding method of the m-layer laminated fabric is forward symmetric folding, reverse symmetric folding, or a combination of both.

[0040] In Step 2, the warp yarns are arranged in a grouped and parallel form, that is, the warp yarns are divided into x groups, x ≥ 2. The x groups of warp yarns are arranged in an up-and-down parallel form, and the number of layers of each group of warp yarns is y layers, y ≥ 1.

[0041] In Step 3, the weft yarns are introduced in a reciprocating continuous weft insertion method. The weft yarns are introduced layer by layer in each group of warp yarns in the order of warp yarn grouping. The weft insertion method is to first insert the weft yarns from the inner layer of the fabric to the outer layer of the fabric, and then from the outer layer of the fabric to the inner layer of the fabric to ensure the continuity of the weft yarns.

[0042] As Figure 5 shown, the planar circumferential fabric is folded forward symmetrically or reverse symmetrically 2 times, m = 4, and the angles of the n fan-shaped fabrics are the same, a1 = a2 =... = an.

[0043] Further, taking Figure 6 as an example, after 2 folds, the size of each layer of the fan is the same. First, mark a main warp yarn as A at the center position of each fan-shaped fabric. The main warp yarn A divides the fan into two symmetric and equal-area fans S1 and S2. Other warp yarns B1, B2,..., Bn are woven into the fan along the length direction of the main warp yarn A at an angle with the main warp yarn A in turn. The warp yarns B1, B2,..., Bn woven into the fan S1 and the warp yarns B1, B2,..., Bn woven into the fan S2 are in opposite directions. Since Figure 5 the planar circumferential fabric in

[0044] Figure 6 The warp yarns are arranged in groups and in parallel. The warp yarns are divided into 4 groups, C1, C2, C3, and C4. The 4 groups of warp yarns are arranged in parallel up and down. The number of layers of each group of warp yarns is y layers, y ≥ 1. Figure 6 For the sake of convenience, the number of warp yarn layers is simply shown as 5. Figure 6 The shape of the fan-shaped fabric is determined by the warp yarn direction shown in the figure. The weft yarn introduced into the warp yarn is introduced in a reciprocating continuous weft insertion method. The weft yarn is introduced in each group of warp yarns layer by layer according to the order of warp yarn grouping. The weft insertion method is to insert the weft from the inner layer of the fabric to the outer layer of the fabric, and then insert the weft from the outer layer of the fabric to the inner layer of the fabric, or to insert the weft from the outer layer of the fabric to the inner layer of the fabric, and then insert the weft from the inner layer of the fabric to the outer layer of the fabric. Figure 6 As shown by the middle arrow, the continuity of the weft yarn is ensured; of course, the weft yarn can also be a discontinuous weft yarn, which is conducive to weaving weft yarns of different tissues and different materials into the plane hoop fabric, thereby increasing the diversity of the plane hoop fabric pattern.

[0045] Embodiment three: Step 1: pre-folding the planar hoop fabric to be woven into n fan-shaped fabrics to be woven, each fan-shaped fabric to be woven is a sheet fabric with m layers, and the angles of the n fan-shaped fabrics to be woven are a1, a2...an, a1+a2+...+an=360°, and n is an integer greater than or equal to 2; Step 2: Pre-arrange the warp yarns; Step 3: Insert the weft in sequence according to the designed weft insertion path to ensure the continuity of the weft yarn and interweave it with the preset warp yarn to complete the weaving; Step 4: Determine whether it is necessary to add or subtract yarn or add or subtract layers at the corresponding position according to the size requirements of the fabric profiling plane, and perform corresponding operations if necessary; Step 5: Repeat steps 3 and 4 until the desired length is reached; Step 6: Spread out the woven n fan-shaped fabrics in a plane to weave a planar hoop fabric having n fan-shaped fabrics.

[0046] In step 1, the folding method of the m-layer fabric is forward symmetrical folding or reverse symmetrical folding or a combination of the two.

[0047] In step 2, the warp yarns are arranged in groups and in parallel, that is, the warp yarns are divided into x groups, x≥2, and the x groups of warp yarns are arranged in parallel up and down, and each group of warp yarns has y layers, y≥1.

[0048] In Step 3, the weft insertion adopts a reciprocating continuous weft insertion method. The weft yarns are reciprocally inserted layer by layer in each group of warp yarns in the order of warp yarn grouping. The weft insertion method is to insert the weft yarn from the inner layer of the fabric to the outer layer of the fabric first, and then from the outer layer of the fabric to the inner layer of the fabric, ensuring the continuity of the weft yarns.

[0049] As Figure 7 shown, the planar circumferential fabric is symmetrically folded forward and reversely symmetrically folded 4 times. m = 8, and the angles of n fan-shaped fabrics are the same, a1 = a2 =... = an.

[0050] Furthermore, taking Figure 8 as an example, after 4 folds, the sizes of each layer of fan-shaped fabrics are the same. First, a main warp yarn A is marked in the center of each fan. The main warp yarn A divides the fan into two symmetric and equal-area fans S1 and S2. Other warp yarns B1, B2,..., Bn are woven into the main warp yarn A at an angle along the length direction of the main warp yarn A. The warp yarns B1, B2,..., Bn woven into the fan S1 and the warp yarns B1, B2,..., Bn woven into the fan S2 are in opposite directions. Figure 8 In Figure 8 , the warp yarn arrangement adopts a grouped and parallel form. The warp yarns are divided into 8 groups, C1 - C8. The 8 groups of warp yarns are arranged in an up-and-down parallel form. The number of layers of each group of warp yarns is y layers, y ≥ 1.

[0051] The planar circumferential fabrics woven and formed in Embodiment 1 to Embodiment 3 are symmetric or asymmetric special-shaped.

[0052] In Embodiment 2 and Embodiment 3, the fan-shaped fabrics can be woven simultaneously according to the above weaving method. When each fan-shaped fabric is woven and formed into the above planar circumferential fabric, the excess warp yarns are subtracted, and the weaving of the planar circumferential fabric is completed, improving the weaving efficiency of the planar circumferential fabric.

[0053] In Example 2 and Example 3, the planar hoop fabric is folded to form n fan-shaped fabrics, which reduces the area occupied by the planar hoop fabric when it is flatly woven and solves the problem of equipment capacity limitation; secondly, the warp yarns of the fan-shaped fabric in each partition can be arranged in advance, which improves the weaving efficiency of the planar hoop fabric.

[0054] A planar annular fabric comprises a fan-shaped fabric woven from n partitions, adjacent fans have a dividing line due to the partition weaving, the angles of the n fan-shaped fabrics are respectively a1, a2...an, a1+a2+...+an=360°, the fabric has high strength, controllable area and special shape, and is used as turbine disks and flanges in the aerospace field, or as generator blades and other equipment in the energy field.

[0055] A method for producing a flat fabric, Step 1: pre-folding the planar fabric to be woven into n rectangular fabrics to be woven, each rectangular fabric to be woven is a sheet fabric with m layers, the n rectangular fabrics to be woven have the same or different lengths, n is an integer greater than or equal to 2, and m is an integer greater than or equal to 1; Step 2: Pre-arrange the warp yarns; Step 3: Insert the weft in sequence according to the designed weft insertion method, and the weft yarn is interwoven with the preset warp yarn to complete the weaving; Step 4: Determine whether it is necessary to add or subtract yarn or add or subtract layers at the corresponding position according to the size requirements of the fabric profiling plane, and perform corresponding operations if necessary; Step 5: Repeat steps 3 and 4 until the desired length is reached; Step 6: Spread out the woven n rectangular fabrics in a plane to weave a planar fabric having n rectangular fabrics.

[0056] In step 2, the warp yarns are arranged in groups and in parallel, that is, the warp yarns are divided into x groups, x≥2, and the x groups of warp yarns are arranged in parallel up and down, and each group of warp yarns has y layers, y≥1.

[0057] In step 3, the weft yarn is introduced by a reciprocating continuous weft insertion method, and the weft yarn is reciprocatingly introduced layer by layer in each group of warp yarns according to the order of warp yarn grouping. The weft insertion method is to first insert the weft from the inner layer of the fabric to the outer layer of the fabric, and then insert the weft from the outer layer of the fabric to the inner layer of the fabric, or to insert the weft from the outer layer of the fabric to the inner layer of the fabric, and then insert the weft from the inner layer of the fabric to the outer layer of the fabric, to ensure the continuity of the weft yarn.

[0058] The folding weaving method is applied to flat fabrics, such as folding 800cm wide fabric in 8 layers continuously to form a 100cm wide fabric.

[0059] like Figure 9As shown, after folding the planar fabric multiple times, n rectangular fabrics of the same size are formed.

[0060] At the center position of each rectangle, a main warp yarn A is first marked. This main warp yarn A divides the rectangular fabric into two symmetrical and equal-area S1 and S2. Other warp yarns B1, B2... Bn are woven in sequence along the length direction of the main warp yarn A. Since the planar fabric is woven during the folding process, after the warp and weft yarns are woven, the excess warp yarns can be quickly trimmed along the boundary.

[0061] The warp yarns are arranged in a grouped and parallel form. The warp yarns are divided into 8 groups, C1, C2, C3, C4, C5, C6, C7, C8. The 8 groups of warp yarns are arranged in a vertically parallel form, and the number of layers of each group of warp yarns is y layers, y≥1, which is set to 5 groups here. The weft yarns introduced for weaving with the warp yarns adopt a reciprocating continuous weft insertion method. The weft yarns are reciprocally introduced layer by layer in each group of warp yarns in the order of warp yarn grouping. The weft insertion method is from the inner layer of the fabric to the outer layer of the fabric, and then from the outer layer of the fabric to the inner layer of the fabric, or from the outer layer of the fabric to the inner layer of the fabric, and then from the inner layer of the fabric to the outer layer of the fabric to ensure the continuity of the weft yarns; of course, the weft yarns among them can also be non-continuous weft yarns, which is beneficial to weaving different tissues and weft yarns of different materials into the planar circumferential fabric, increasing the diversity of the patterns of the planar circumferential fabric.

[0062] A planar fabric is woven by using the described production method and includes n rectangular fabrics woven in partitions.

[0063] In the embodiments of the present invention, both fixed-length weaving or continuous weaving can be adopted. Fixed-length weaving means that the warp yarns are designed within a certain length range, connected to the tension line, and woven with a fixed-length weaving device; continuous weaving means that the warp yarns are designed with a longer length, continuously stored in the yarn storage device, and woven with a continuous weaving device.

[0064] The yarn distribution method of the laminated fabric can also adopt a gradient type. Gradient yarn distribution means that during the weaving process of the fabric, by changing the arrangement, diameter, density or other parameters of the yarns, a structure with gradient changes is formed in the thickness direction or the planar direction of the fabric. This gradient change can be a gradual decrease in the yarn diameter, a change in the porosity, or an adjustment of the yarn arrangement density.

[0065] In the embodiments of the present invention, the planar circumferential fabric, laminated fabric, and fan-shaped fabric involved in step 1 are all the conceived shapes before weaving, not the entities after weaving.

[0066] Compared with the prior art, some advantages of the present invention are: First, compared with the prior art, by dividing the planar circumferential fabric into several fan-shaped fabrics, the present invention can realize the rapid weaving of several fan-shaped fabrics, improving the weaving efficiency of the planar circumferential fabric.

[0067] Second, the present invention meets the forming requirements of two-dimensional planar circumferential fabrics, can achieve diversified fabric structures, improve the designability of fabric structures, and better meet the needs of different composite materials. The equipment can be used for fixed-length weaving and is also suitable for continuous weaving.

[0068] Third, the present invention adopts a grouped and parallel warp arrangement method and a reciprocating weft insertion method, which can achieve profiling weaving of large-size and large-diameter fabrics and solve the problem of equipment capacity limitation.

[0069] Fourth, the weft insertion method in the present invention also includes introducing a new weft every time a circle is woven. The weft is woven with the warp layer by layer from the inside to the outside, which is beneficial to weaving different patterns in the planar circumferential fabric.

[0070] Fifth, the fabric of the present invention is woven during the folding process. Therefore, after the warp and weft are woven, the excess warp can be quickly trimmed along the fan-shaped boundary, improving the weaving efficiency of the planar circumferential fabric.

[0071] Sixth, compared with the prior art, the present invention can achieve rapid weaving of several rectangular fabrics by dividing the planar fabric into several rectangular fabrics, improving the weaving speed and efficiency of the planar fabric.

[0072] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0073] Although reference numerals in the drawings are used more herein, the possibility of using other terms is not excluded; these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A production method of a planar circumferential fabric, characterized in that, The following steps are included: Step 1: pre-folding the planar hoop fabric to be woven into n fan-shaped fabrics to be woven, each fan-shaped fabric to be woven is a sheet fabric with m layers, and the angles of the n fan-shaped fabrics to be woven are a1, a2...an, a1+a2+...+an=360°, n is an integer greater than or equal to 2, and m is an integer greater than or equal to 1; Step 2: pre-arrange the warp yarns, first mark a main warp yarn as A, the main warp yarn A divides the fan-shaped fabric into two symmetrical fans S1 and S2 with the same area, and the other warp yarns B1, B2...Bn are woven in sequence along the length direction of the main warp yarn A at an angle to the main warp yarn A; Step 3: Insert the weft in sequence according to the designed weft insertion method, and the weft yarn is interwoven with the preset warp yarn to complete the weaving; Step 4: Determine whether it is necessary to add or subtract yarn or add or subtract layers at the corresponding position according to the size requirements of the fabric profiling plane, and perform corresponding operations if necessary; Step 5: Repeat steps 3 and 4 until the desired length is reached; Step 6: Spread out the woven n fan-shaped fabrics in a plane to weave a planar hoop fabric having n fan-shaped fabrics.

2. A method for producing a planar hoop fabric according to claim 1, characterized in that: In step 1, the m-layer fabric is folded in a forward symmetrical manner or a reverse symmetrical manner or a combination of the two.

3. A method for producing a planar hoop fabric according to claim 1, characterized in that: In step 2, the warp yarns are arranged in groups and in parallel, that is, the warp yarns are divided into x groups, x≥2, and the x groups of warp yarns are arranged in parallel up and down, and each group of warp yarns has y layers, y≥1.

4. A production method of a planar circumferential fabric according to claim 1, characterized in that, The warp yarns B1, B2, ... Bn woven into the fan-shaped S1 and the warp yarns B1, B2, ... Bn woven into the fan-shaped S2 are in opposite directions.

5. The method for producing a planar hoop fabric according to claim 1, characterized in that: In step 3, the weft yarn is introduced by a reciprocating continuous weft insertion method, and the weft yarn is reciprocated and introduced layer by layer in each group of warp yarns according to the order of warp yarn grouping. The weft insertion method is to first insert the weft from the inner layer of the fabric to the outer layer of the fabric, and then insert the weft from the outer layer of the fabric to the inner layer of the fabric, so as to ensure the continuity of the weft yarn.

6. A method for producing a planar hoop fabric according to claim 1, characterized in that: In step 3, each time the weft yarn is woven into a circle, a new weft thread is introduced, and the weft threads are woven with the warp threads in sequence from the inside to the outside.

7. A planar circumferential fabric, characterized in that, The material is woven by the production method described in any one of claims 1 to 6 and is used as a turbine disk or flange in the aerospace field, or as a generator blade in the energy field.

8. A planar circumferential fabric according to claim 7, wherein, The invention comprises a fan-shaped fabric woven by n partitions, adjacent fan-shaped fabrics have a dividing line due to the partition weaving, and the angles of the n fan-shaped fabrics are respectively a1, a2...an, a1+a2+...+an=360°.

9. A method for producing a flat fabric, characterized in that: Step 1: pre-folding the planar fabric to be woven into n rectangular fabrics to be woven, each rectangular fabric to be woven is a sheet fabric with m layers, the n rectangular fabrics to be woven have the same or different lengths, n is an integer greater than or equal to 2, and m is an integer greater than or equal to 1; Step 2: Preset the warp yarn arrangement. First, mark a main warp yarn as A. The main warp yarn A divides the rectangular fabric into two symmetrical rectangles S1 and S2 with the same area. Other warp yarns B1, B2...Bn are woven in sequence along the length direction of the main warp yarn A. Step 3: Insert the weft in sequence according to the designed weft insertion method, and the weft yarn is interwoven with the preset warp yarn to complete the weaving; Step 4: Determine whether it is necessary to add or subtract yarn or add or subtract layers at the corresponding position according to the size requirements of the fabric profiling plane, and perform corresponding operations if necessary; Step 5: Repeat steps 3 and 4 until the desired length is reached; Step 6: Spread out the woven n rectangular fabrics in a plane to weave a planar fabric having n rectangular fabrics.

10. A method for producing a flat fabric according to claim 9, characterized in that: In step 2, the warp yarns are arranged in groups and in parallel, that is, the warp yarns are divided into x groups, x≥2, and the x groups of warp yarns are arranged in a vertically parallel manner, and each group of warp yarns has y layers, y≥1.

11. The method for producing a flat fabric according to claim 9, characterized in that: In step 3, the weft yarn is introduced by a reciprocating continuous weft insertion method, and the weft yarn is reciprocated and introduced layer by layer in each group of warp yarns according to the order of warp yarn grouping. The weft insertion method is to first insert the weft from the inner layer of the fabric to the outer layer of the fabric, and then insert the weft from the outer layer of the fabric to the inner layer of the fabric, so as to ensure the continuity of the weft yarn.

12. A planar fabric, characterized in that, The rectangular fabric is woven by the production method according to any one of claims 9 to 11 and is woven from n partitions.

Images