CN111926454B - Three-dimensional weaving ribbed pipe process and ribbed pipe - Google Patents
Three-dimensional weaving ribbed pipe process and ribbed pipe Download PDFInfo
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- CN111926454B CN111926454B CN202010695787.3A CN202010695787A CN111926454B CN 111926454 B CN111926454 B CN 111926454B CN 202010695787 A CN202010695787 A CN 202010695787A CN 111926454 B CN111926454 B CN 111926454B
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- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
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- D04C1/00—Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof
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Abstract
The invention discloses a process for three-dimensional knitting of a ribbed tube and the ribbed tube, wherein the process is completed on a three-dimensional knitting machine, the three-dimensional knitting machine comprises yarn carriers, and a plurality of yarn carriers corresponding to a plurality of main knitting yarns are distributed on the circumferences of concentric circles with different diameters and are continuously distributed on the circumferences; a part of the plurality of yarn carriers corresponding to the plurality of rib knitting yarns is distributed on the same circumference as the main body knitting yarns, and the other part of the plurality of yarn carriers is distributed on the circumference which is arranged in/outside the innermost/outer ring circumference of the main body knitting yarns and is concentric with the innermost/outer ring circumference; the yarn carrying device moves in the radial direction and the circumferential direction to drive the main body weaving yarns and the rib weaving yarns to weave to form the ribbed tube with the reinforcing ribs axially arranged on the outer/inner peripheral side wall. The ribbed tube with the axially arranged reinforcing ribs on the outer/inner peripheral side wall is formed by radial and circumferential movement of the main body weaving yarns and the rib weaving yarns, the weaving process is simple, continuous production is easy to realize, and the obtained ribbed tube has good mechanical property.
Description
Technical Field
The invention belongs to the field of weaving processes, and particularly relates to a three-dimensional weaving ribbed tube process and a ribbed tube.
Background
The three-dimensional braided fabric has the greatest characteristic of no layer structure and can be integrally formed, so that the three-dimensional braided composite material is a complete integral structure, has high specific strength and specific modulus and excellent mechanical property, and can be widely applied to the fields of aerospace, aviation, medical treatment and the like. At present, researchers have done a lot of work on three-dimensional braided composite tubing, but most of the research is focused on variable cross-section tubing. The knitting process of the variable cross-section pipe is to knit the variable cross-section pipe by a yarn increasing or decreasing method in the knitting process, the knitting process is complex, the knitting process is difficult, and the mechanical property of the obtained pipe product is poor.
The Chinese patent with the application number of CN103437064A discloses a yarn-reducing and yarn-adding weaving method of a three-dimensional variable-cross-section woven prefabricated member developed by an active yarn carrier, which is based on a three-dimensional vertical and horizontal weaving process of a four-step method, and carries out corresponding movement on the active yarn carrier arranged on a weaving chassis consisting of fixed vertical and horizontal row rails in the three-dimensional weaving process of the prefabricated member according to the change of the cross section of the three-dimensional woven prefabricated member; if the sectional area of the three-dimensional knitted prefabricated member is reduced, the number of active yarn carriers is reduced along a closed curve at the edge of a sectional area change plane; if the sectional area of the three-dimensional woven prefabricated member is increased, the corresponding number of active yarn carriers is increased along the closed curve of the edge of the sectional area change plane. According to the method, the variable cross-section prefabricated part is woven by a yarn reducing and yarn adding method, the weaving process is complex, the operation steps are complex, and the bending strength and the compression strength of the obtained variable cross-section prefabricated part are small.
Chinese patent application No. CN200510016207.9 discloses a three-dimensional knitting method of a variable cross-section preformed part and a part technology thereof, the three-dimensional knitting method is based on a four-step three-dimensional multidirectional knitting process, in the knitting process, one end face of the preformed part is used as a reference, and according to the change of the cross-section size of the preformed part and the motion rule of knitting yarns, the number of yarn reducing points or yarn increasing points in the cross-section is designed, and the yarn reducing points or the yarn increasing points are uniformly distributed in the cross-section; and determining the thickness of the knitting yarns at the yarn receiving point or the yarn shrinking point according to the requirement of the fiber volume content, and completing the three-dimensional multi-directional integral knitting of the variable cross-section pre-forming part by the methods of moving, doubling, re-thinning or yarn increasing, segmenting and re-moving the knitting yarns. The patent weaves the workpiece by gradually increasing or decreasing the quantity of the weaving yarns, the weaving process of the weaving process is complex, and the obtained woven workpiece has poor mechanical property.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to solve the problems that the existing tubular product weaving process is complex and the obtained tubular product has poor mechanical property, and provides a three-dimensional weaving reinforced pipe process, so that the three-dimensional weaving reinforced pipe process is simple and easy to operate, and the reinforced pipe produced by the three-dimensional weaving reinforced pipe process has a compact structure and good mechanical property.
In order to solve the technical problems, the invention adopts the technical scheme that:
a plurality of yarn carriers corresponding to the plurality of main body knitting yarns are distributed on the circumferences of concentric circles with different diameters and are continuously distributed on the circumferences;
a part of the plurality of yarn carriers corresponding to the plurality of rib knitting yarns is distributed on the same circumference as the main body knitting yarns, and the other part of the plurality of yarn carriers is distributed on the circumference which is arranged in/outside the innermost/outer ring circumference of the main body knitting yarns and is concentric with the innermost/outer ring circumference;
the yarn carrying device moves in the radial direction and the circumferential direction to drive the main body weaving yarns and the rib weaving yarns to weave to form the ribbed tube with the reinforcing ribs axially arranged on the outer/inner peripheral side wall.
Furthermore, the number of the yarn carriers corresponding to the main body knitting yarn arranged on each circle of circumference is m, the yarn carriers on different circumferences are aligned in the radial direction to form a radial array, and the number of the yarn carriers arranged on the radial array is n;
the number of the yarn carriers corresponding to the rib knitting yarns arranged on each circle of circumference is r, the yarn carriers on different circumferences are aligned in the radial direction to form a radial array, and the number of the yarn carriers arranged on the radial array is s;
the number of the reinforcing ribs is t, m is more than or equal to 3, n is more than or equal to 3, r is more than or equal to 1, s is more than or equal to 3, t is more than or equal to 1, m is more than or equal to txr + t, and m, n, r, s and t are positive integers.
Further, add muscle pipe main part and strengthening rib that muscle pipe includes the tubulose structure, the yarn is woven to the main part and radially and the dislocation motion of circumference forms and adds muscle pipe main part under the drive of carrying the yarn ware, the yarn is woven to the rib is radially and the dislocation motion of circumference forms under the drive of carrying the yarn ware the strengthening rib.
Furthermore, the concentric circles sequentially form the 1 st circle to the s th circle from outside to inside, and radial rows on the concentric circles sequentially form the 1 st row to the m + r th row;
when in the initial position, the yarn carriers corresponding to the main body knitting yarns are distributed from the (s-n) th circle to the (s-1) th circle and from the (r + 1) th row to the (r + m) th row;
yarn ware that carries that yarn is knitted to the rib distributes at the 1 st circle to the s circle, and the 1 st is listed as to the r row, and the yarn ware that carries that yarn corresponds is knitted yarn through the main part and is done radial and circumferential dislocation motion and form the muscle pipe that adds that has the axial strengthening rib on the periphery lateral wall with the rib.
Furthermore, the concentric circles sequentially form the 1 st circle to the s th circle from outside to inside, and radial rows on the concentric circles sequentially form the 1 st row to the m + r th row;
in the initial position, the yarn carriers corresponding to the main body knitting yarns are distributed in the 1 st to nth turns and the r +1 st to the r + m th rows;
yarn carriers corresponding to the rib knitting yarns are distributed in the 1 st circle to the s-th circle and the 1 st row to the r-th row; the main body knitting yarn and the yarn carrying device corresponding to the rib knitting yarn do radial and circumferential dislocation motion to form the ribbed tube with the axial reinforcing ribs on the inner peripheral side wall.
Further, the step of knitting the ribbed tube body includes:
(1) pushing the main body knitting yarns on the radial rows and the yarn carriers corresponding to the rib knitting yarns to do radial dislocation movement, namely pushing the 1 st row to the m + r th row to do radial dislocation movement;
(2) pushing the yarn carriers corresponding to the main body knitting yarns to move in a circumferential staggered manner;
when the yarn carriers corresponding to the main body knitting yarns are distributed from the (s-n) th circle to the (s-1) th circle, pushing the (s-n + 1) th circle to the (s-1) th circle to do circumferential dislocation motion;
when the yarn carriers corresponding to the main body knitting yarns are distributed in the 1 st circle to the nth circle, the 2 nd circle to the nth circle are pushed to do circumferential dislocation motion;
(3) and pushing the 1 st column and the r +1 st column of the radial columns to perform radial homing movement, and restoring the two columns to the initial positions.
Further, the step of weaving the reinforcing ribs comprises:
(1) when the yarn carriers corresponding to the main body knitting yarns are distributed from the s-n ring to the s-1 ring, the 1 st ring to the s-n ring of the yarn carriers corresponding to the rib knitting yarns are pushed to do circumferential dislocation motion;
when the yarn carriers corresponding to the main body knitting yarns are distributed in the 1 st circle to the nth circle, the n +1 th circle to the s-th circle of the yarn carriers corresponding to the rib knitting yarns are pushed to do circumferential dislocation motion;
(2) pushing the No. 2 to No. r lines of the yarn carriers corresponding to the rib knitting yarns to do radial dislocation motion;
(3) pushing the s-n ring of the yarn carrier corresponding to the main body knitting yarn to do circumferential motion;
(4) pushing the yarn carriers corresponding to the main body knitting yarns to do radial dislocation motion except for the other rows from the 2 nd row to the r th row;
(5) pushing other rings outside the nth ring to do circumferential dislocation motion.
Further, the step of weaving the reinforced pipe main body and the step of weaving the reinforcing ribs are circulated to obtain the reinforced pipe with the axial reinforcing ribs on the outer/inner peripheral side wall.
Further, the total number of the rib knitting yarns and the body knitting yarns is Ns ═ m × n-1+ t × (r × s-1) +2 × t. .
The invention also aims to provide the ribbed tube which is knitted by adopting the three-dimensional knitting ribbed tube process.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
according to the invention, the main body knitting yarns and the rib knitting yarns are driven by the yarn carrier to move radially and circumferentially to form the ribbed tube with the reinforcing ribs axially arranged on the outer/inner peripheral side wall, the knitting process is simple, the continuous production is easy to realize, the obtained ribbed tube has good mechanical properties, especially higher bending strength and compression strength, and the ribbed tube can be widely applied to the fields of aviation, aerospace, energy, traffic, sports and the like.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is an arrangement of body knitting yarns and rib knitting yarns according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a ribbed pipe of the present invention having axial ribs on the peripheral sidewall;
FIG. 3 is a schematic view of the construction of a ribbed pipe of the invention having axial ribs on the peripheral sidewall;
FIG. 4 is a cross-sectional view of a ribbed pipe of the present invention having axial ribs on the inner peripheral sidewall;
fig. 5 is a schematic view of the structure of the ribbed pipe with axial ribs on the inner peripheral sidewall of the present invention.
Wherein:
1. weaving the chassis; 2. weaving yarns; 3. a ribbed pipe body; 4. and (5) reinforcing ribs.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in figure 1, the invention discloses a three-dimensional weaving reinforced pipe process which is completed on a three-dimensional weaving machine. The three-dimensional knitting machine comprises a knitting chassis 1 and a yarn carrier. The knitting yarns 2 move and knit on the knitting chassis 1 to form a ribbed tube.
Specifically, the knitting yarn 2 in the present invention includes a plurality of rib knitting yarns and a plurality of body knitting yarns. The yarn carriers corresponding to the main body knitting yarns are distributed on the circumferences of concentric circles with different diameters on the knitting chassis 1 and are continuously distributed on the circumferences; some of the ware that carries that many ribs braided yarn corresponds distribute on the circumference the same with the main part braided yarn, and another part distributes inside the main part braided yarn inner circle circumference and with the concentric circumference that sets up of inner circle circumference, carry the ware and be radial and circumferential motion and drive the main part braided yarn and the rib braided yarn and weave the ribbed tube that adds that has the strengthening rib of axial setting on the lateral wall of formation inner periphery.
Or one part of the yarn carriers corresponding to the plurality of rib knitting yarns is distributed on the same circumference with the main body knitting yarns, and the other part of the yarn carriers is distributed on the circumference which is outside the outermost circle circumference of the main body knitting yarns and is concentrically arranged with the outermost circle circumference. The yarn carrying device moves in the radial direction and the circumferential direction to drive the main body weaving yarns and the rib weaving yarns to weave to form the rib adding pipe with the reinforcing ribs arranged in the axial direction on the peripheral side wall.
The main body knitting yarns and the rib knitting yarns are driven by the yarn carrier to move radially and circumferentially to form the ribbed tube with the axially arranged reinforcing ribs on the outer/inner peripheral side wall, the knitting process is simple, continuous production is easy to realize, the obtained ribbed tube is good in mechanical property, especially high in bending strength and compression strength, and the ribbed tube can be widely applied to the fields of aviation, aerospace, energy, traffic, sports and the like.
Specifically, the number of the yarn carriers corresponding to the main body knitting yarn arranged on each circle of circumference is m, the yarn carriers on different circumferences are aligned in the radial direction to form a radial column, and the number of the yarn carriers arranged on the radial column is n.
The number of the yarn carriers corresponding to the rib knitting yarns arranged on each circle of circumference is r, the yarn carriers on different circumferences are aligned in the radial direction to form a radial array, and the number of the yarn carriers arranged on the radial array is s.
The number of the reinforcing ribs is t, m is more than or equal to 3, n is more than or equal to 3, r is more than or equal to 1, s is more than or equal to 3, t is more than or equal to 1, m is more than or equal to txr + t, and m, n, r, s and t are positive integers.
As shown in fig. 2 to 5, the ribbed tube comprises a ribbed tube main body 3 with a tubular structure and reinforcing ribs 4, wherein main body knitting yarns are driven by a yarn carrier to perform radial and circumferential dislocation motion to form the ribbed tube main body 3; the rib knitting yarns are driven by the yarn carrying device to do radial and circumferential dislocation motion to form the reinforcing ribs 4.
As an embodiment of the present invention, the concentric circles sequentially from the outer to the inner are the 1 st circle to the s th circle, and the radial columns on the concentric circles sequentially are the 1 st column to the m + r th column;
when in the initial position, the yarn carriers corresponding to the main body knitting yarns are distributed from the (s-n) th circle to the (s-1) th circle and from the (r + 1) th row to the (r + m) th row;
the yarn ware that carries that the yarn was woven to the rib distributes at the 1 st circle to the s circle, and the 1 st is listed as to the r row, and the yarn ware that carries that the yarn was woven to the rib through the main part is woven yarn and the yarn is woven to the rib and is radially and the dislocation motion of circumference form as the ribbed tube that has the axial strengthening rib on the periphery lateral wall shown in figure 2 and figure 3.
As another embodiment of the present invention, the concentric circles sequentially from the outer to the inner are the 1 st circle to the s th circle, and the radial columns on the concentric circles sequentially from the 1 st column to the m + r th column;
in the initial position, the yarn carriers corresponding to the main body knitting yarns are distributed in the 1 st to nth turns and the r +1 st to the r + m th rows;
yarn carriers corresponding to the rib knitting yarns are distributed in the 1 st circle to the s-th circle and the 1 st row to the r-th row; the ribbed tube with axial reinforcing ribs on the inner peripheral side wall as shown in fig. 4 and 5 is formed by the dislocation motion of the yarn carriers corresponding to the main body knitting yarns and the rib knitting yarns in the radial direction and the circumferential direction.
The weaving step of the reinforced pipe main body 3 comprises the following steps:
(1) pushing the main body knitting yarns on the radial rows and the yarn carriers corresponding to the rib knitting yarns to do radial dislocation movement, namely pushing the 1 st row to the m + r th row to do radial dislocation movement;
(2) pushing the yarn carriers corresponding to the main body knitting yarns to move in a circumferential staggered manner;
when the yarn carriers corresponding to the main body knitting yarns are distributed from the (s-n) th circle to the (s-1) th circle, pushing the (s-n + 1) th circle to the (s-1) th circle to do circumferential dislocation motion;
when the yarn carriers corresponding to the main body knitting yarns are distributed in the 1 st circle to the nth circle, the 2 nd circle to the nth circle are pushed to do circumferential dislocation motion;
(3) and pushing the 1 st column and the r +1 st column of the radial columns to perform radial homing movement, and restoring the two columns to the initial positions.
The weaving step of the reinforcing ribs 4 comprises the following steps:
(1) when the yarn carriers corresponding to the main body knitting yarns are distributed from the s-n ring to the s-1 ring, the 1 st ring to the s-n ring of the yarn carriers corresponding to the rib knitting yarns are pushed to do circumferential dislocation motion;
when the yarn carriers corresponding to the main body knitting yarns are distributed in the 1 st circle to the nth circle, the n +1 th circle to the s-th circle of the yarn carriers corresponding to the rib knitting yarns are pushed to do circumferential dislocation motion;
(2) pushing the No. 2 to No. r lines of the yarn carriers corresponding to the rib knitting yarns to do radial dislocation motion;
(3) pushing the s-n ring of the yarn carrier corresponding to the main body knitting yarn to do circumferential motion;
(4) pushing the yarn carriers corresponding to the main body knitting yarns to do radial dislocation motion except for the other rows from the 2 nd row to the r th row;
(5) pushing other rings outside the nth ring to do circumferential dislocation motion.
And circulating the weaving step of the reinforced pipe main body 3 and the weaving step of the reinforcing ribs 4 to obtain the reinforced pipe with the axial reinforcing ribs 4 on the outer/inner peripheral side wall.
The total number of the rib knitting yarns and the main body knitting yarns is Ns (m multiplied by n-1+ t multiplied by (r multiplied by s-1) +2 multiplied by t.
As shown in fig. 1, as another embodiment of the present invention, there is provided a main body knitting yarn corresponding to the yarn carriers arranged in 8 number per one turn of circumference, the yarn carriers on different circumferences are aligned in radial direction to form radial columns, and the number of the yarn carriers arranged in the radial columns is 4.
The number of the yarn carriers corresponding to the rib knitting yarns arranged on each circle of circumference is 4, the yarn carriers on different circumferences are aligned in the radial direction to form a radial array, and the number of the yarn carriers arranged on the radial array is 7; the peripheral side wall of the reinforcing ribs with the number of 1 is provided with a reinforcing rib pipe with axial reinforcing ribs 4.
The concentric circles of this embodiment are sequentially from the 1 st circle to the 7 th circle from the outside to the inside, and the radial rows on the concentric circles are sequentially from the 1 st row to the 12 th row.
In the initial position, the yarn carriers corresponding to the main body knitting yarns are distributed in 3 rd to 6 th circles and 5 th to 12 th lines;
yarn carriers corresponding to the rib knitting yarns are distributed in the 1 st to 7 th circles and the 1 st to 4 th rows;
the yarn carrying device corresponding to the main body weaving yarns and the rib weaving yarns carries out radial and circumferential dislocation motion to drive the main body weaving yarns and the rib weaving yarns to weave to form the rib adding pipe with the axial reinforcing ribs 4 on the peripheral side wall.
The knitting step of the reinforced pipe main body 3 in this embodiment includes:
(1) pushing the main body knitting yarns on the radial rows and the yarn carriers corresponding to the rib knitting yarns to do radial dislocation movement, namely pushing the 1 st row to the 12 th row to do radial dislocation movement;
(2) pushing the yarn carriers corresponding to the main body knitting yarns to do circumferential dislocation motion; namely, the 4 th circle to the 6 th circle are pushed to do circumferential dislocation motion;
(3) and pushing the 1 st column and the 5 th column of the radial columns to perform radial homing movement, and restoring the two columns to the initial positions.
In this embodiment, the step of knitting the reinforcement ribs 4 includes:
(1) pushing the 1 st circle to the 3 rd circle of the yarn carrier corresponding to the rib knitting yarns to do circumferential dislocation motion;
(2) pushing the 2 nd to 4 th rows of yarn carriers corresponding to the rib knitting yarns to do radial dislocation motion;
(3) pushing the 3 rd circle of the yarn carrier corresponding to the main body knitting yarn to do circumferential motion;
(4) pushing other lines except the 2 nd line to the 4 th line of the yarn carrier corresponding to the main body knitting yarn to do radial dislocation motion;
(5) pushing the other rings except the 4 th ring to do circumferential dislocation motion.
And circulating the weaving step of the reinforced pipe main body 3 and the weaving step of the reinforcing ribs 4 to obtain the reinforced pipe with the axial reinforcing ribs on the peripheral side wall. In this embodiment, the total number Ns of the main knitting yarns and rib knitting yarns is 8 × 4-1+1 × (4 × 7-1) +2 × 1 is 60.
As another embodiment of the present invention, the concentric circles of the present embodiment sequentially include the 1 st circle to the 7 th circle from the outside to the inside, and the radial rows on the concentric circles sequentially include the 1 st row to the 12 th row.
In the initial position, yarn carriers corresponding to the main body knitting yarns are distributed in the 1 st to 4 th circles and the 5 th to 12 th rows;
yarn carriers corresponding to the rib knitting yarns are distributed in the 1 st to 7 th circles and the 1 st to 4 th rows;
the yarn carrying device corresponding to the main weaving yarn and the rib weaving yarn carries out radial and circumferential dislocation motion to drive the main weaving yarn and the rib weaving yarn to weave to form the ribbed tube with the axial reinforcing ribs 4 on the inner peripheral side wall.
The knitting step of the reinforced pipe main body 3 in this embodiment includes:
(1) pushing the main body knitting yarns on the radial rows and the yarn carriers corresponding to the rib knitting yarns to do radial dislocation movement, namely pushing the 1 st row to the 12 th row to do radial dislocation movement;
(2) pushing the yarn carriers corresponding to the main body knitting yarns to do circumferential dislocation motion; namely, the 2 nd to 4 th circles are pushed to do the circumferential dislocation motion;
(3) and pushing the 1 st column and the 5 th column of the radial columns to perform radial homing movement, and restoring the two columns to the initial positions.
In this embodiment, the step of knitting the reinforcement ribs 4 includes:
(1) pushing the 5 th circle to the 7 th circle of the yarn carrier corresponding to the rib knitting yarns to do dislocation motion in the circumferential direction;
(2) pushing the 2 nd to 4 th rows of yarn carrying corresponding to the rib knitting yarns to do radial dislocation motion;
(3) pushing the 3 rd circle of the yarn carrier corresponding to the main body knitting yarn to do circumferential motion;
(4) pushing the other rows except the 2 nd row to the 4 th row of the yarn carrier corresponding to the main body knitting yarn to do dislocation motion in the diameter direction;
(5) pushing the other rings except the 4 th ring to do circumferential dislocation motion.
And circulating the weaving step of the reinforced pipe main body 3 and the weaving step of the reinforcing ribs 4 to obtain the reinforced pipe with the axial reinforcing ribs on the inner peripheral side wall. The total number of the main knitting yarns and rib knitting yarns in this example is Ns 8 × 4-1+1 × (4 × 7-1) +2 × 1 ═ 60.
In addition, the invention also provides a reinforced pipe which is woven by adopting the three-dimensional weaving reinforced pipe process. Wherein, the reinforcing ribs 4 of the reinforced pipe are axially arranged on the inner peripheral side wall or the outer peripheral side wall of the reinforced pipe main body 3. The ribbed pipe has simple weaving process and good mechanical property, and can be widely applied to the fields of aviation, aerospace, energy, traffic, sports and the like.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A process for three-dimensional knitting of ribbed tubes, said process being carried out on a three-dimensional knitting machine comprising a yarn carrier, characterized in that: a plurality of yarn carriers corresponding to the plurality of main body knitting yarns are continuously distributed on the circumferences of concentric circles with different diameters;
one part of a plurality of yarn carriers corresponding to the plurality of rib knitting yarns is distributed on the circumference same as the main body knitting yarns, the other part of the plurality of yarn carriers is distributed inside the innermost circumference of the main body knitting yarns and on the circumference concentrically arranged with the innermost circumference, and the yarn carriers do radial and circumferential motion to drive the main body knitting yarns and the rib knitting yarns to be knitted to form a ribbed tube with axially arranged reinforcing ribs on the inner circumferential side wall;
or the other part is distributed outside the outermost circle and on the circumference concentrically arranged with the outermost circle, and the yarn carrier moves in the radial direction and the circumferential direction to drive the main body knitting yarns and the rib knitting yarns to knit to form the ribbed tube with the reinforcing ribs axially arranged on the peripheral side wall.
2. The three-dimensional weaving reinforced pipe process according to claim 1, characterized in that: the number of the yarn carriers corresponding to the main body knitting yarn arranged on each circle of circumference is m, the yarn carriers on different circumferences are aligned in the radial direction to form a radial array, and the number of the yarn carriers arranged on the radial array is n;
the number of the yarn carriers corresponding to the rib knitting yarns arranged on each circle of circumference is r, the yarn carriers on different circumferences are aligned in the radial direction to form a radial array, and the number of the yarn carriers arranged on the radial array is s;
the number of the reinforcing ribs is t, m is more than or equal to 3, n is more than or equal to 3, r is more than or equal to 1, s is more than or equal to 3, t is more than or equal to 1, m is more than or equal to txr + t, and m, n, r, s and t are positive integers.
3. The three-dimensional weaving reinforced pipe process according to claim 2, characterized in that: the ribbed tube comprises a ribbed tube main body and reinforcing ribs of a tubular structure, the main body is woven with yarns under the drive of a yarn carrying device to form a ribbed tube main body in a radial and circumferential dislocation motion mode, and the ribs are woven with yarns under the drive of the yarn carrying device to form a radial and circumferential dislocation motion mode.
4. The three-dimensional weaving reinforced pipe process according to claim 3, characterized in that: the concentric circles sequentially form the 1 st circle to the s th circle from outside to inside, and radial columns on the concentric circles sequentially form the 1 st row to the m + r th row;
when in the initial position, the yarn carriers corresponding to the main body knitting yarns are distributed from the (s-n) th circle to the (s-1) th circle and from the (r + 1) th row to the (r + m) th row;
yarn carriers corresponding to the rib knitting yarns are distributed in the 1 st circle to the s-th circle and the 1 st row to the r-th row;
the yarn carrying devices corresponding to the main weaving yarns and the rib weaving yarns do radial and circumferential malposition motion to form the rib adding pipe with axial reinforcing ribs on the peripheral side wall.
5. The three-dimensional weaving reinforced pipe process according to claim 3, characterized in that: the concentric circles sequentially form the 1 st circle to the s th circle from outside to inside, and radial columns on the concentric circles sequentially form the 1 st row to the m + r th row;
in the initial position, the yarn carriers corresponding to the main body knitting yarns are distributed in the 1 st to nth turns and the r +1 st to the r + m th rows;
yarn carriers corresponding to the rib knitting yarns are distributed in the 1 st circle to the s-th circle and the 1 st row to the r-th row;
the yarn carrying devices corresponding to the main weaving yarns and the rib weaving yarns do radial and circumferential malposition motion to form the ribbed tube with the axial reinforcing ribs on the inner peripheral side wall.
6. A process of three-dimensional weaving of ribbed tubes according to claim 4 or 5, characterized in that:
the step of weaving the reinforced pipe main body comprises the following steps:
(1) pushing the main body knitting yarns on the radial rows and the yarn carriers corresponding to the rib knitting yarns to do radial dislocation movement, namely pushing the 1 st row to the m + r th row to do radial dislocation movement;
(2) pushing the yarn carriers corresponding to the main body knitting yarns to move in a circumferential staggered manner;
when the yarn carriers corresponding to the main body knitting yarns are distributed from the (s-n) th circle to the (s-1) th circle, pushing the (s-n + 1) th circle to the (s-1) th circle to do circumferential dislocation motion;
when the yarn carriers corresponding to the main body knitting yarns are distributed in the 1 st circle to the nth circle, the 2 nd circle to the nth circle are pushed to do circumferential dislocation motion;
(3) and pushing the 1 st column and the r +1 st column of the radial columns to perform radial homing movement, and restoring the two columns to the initial positions.
7. The process of claim 6 for producing a three-dimensional braided reinforced pipe, comprising:
the step of weaving the reinforcing ribs comprises:
(1) when the yarn carriers corresponding to the main body knitting yarns are distributed from the s-n ring to the s-1 ring, the 1 st ring to the s-n ring of the yarn carriers corresponding to the rib knitting yarns are pushed to do circumferential dislocation motion;
when the yarn carriers corresponding to the main body knitting yarns are distributed in the 1 st circle to the nth circle, the n +1 th circle to the s-th circle of the yarn carriers corresponding to the rib knitting yarns are pushed to do circumferential dislocation motion;
(2) pushing the No. 2 to No. r lines of the yarn carriers corresponding to the rib knitting yarns to do radial dislocation motion;
(3) pushing the s-n ring of the yarn carrier corresponding to the main body knitting yarn to do circumferential motion;
(4) pushing the yarn carriers corresponding to the main body knitting yarns to do radial dislocation motion except for the other rows from the 2 nd row to the r th row;
(5) pushing other rings outside the nth ring to do circumferential dislocation motion.
8. The process of claim 7 for producing a three-dimensional braided reinforced pipe, comprising: and circulating the step of weaving the reinforced pipe main body and the step of weaving the reinforcing ribs to obtain the reinforced pipe with the axial reinforcing ribs on the outer/inner peripheral side wall.
9. The three-dimensional weaving reinforced pipe process according to claim 2, characterized in that: the total number of the rib knitting yarns and the main body knitting yarns is Ns (m multiplied by n-1+ t multiplied by (r multiplied by s-1) +2 multiplied by t.
10. A ribbed tube knitted using the three dimensional knit ribbed tube process of any one of claims 1-9.
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