Thick-walled multi-angle fiber composite material roller forming device and forming method thereof

Abstract

The present invention proposes a forming device and a forming method for a thick-walled multi-angle fiber composite material roller, which belongs to the field of fiber composite material manufacturing. Two yarn sheet positioning rings are respectively installed at the matching positions at both ends of the core mold, and act as cutting pads when the thick-walled roller is wound. The core mold with the yarn sheet positioning ring installed is connected and positioned through the front end positioning hole and the rear end top hole and the front end chuck and the rear end top of the winding machine, and the rotation of the core mold and the winding of the yarn sheet are realized through the multi-axis control of the winding machine. The forming method realizes the continuous fiber geodesic winding forming of the headless straight fiber composite material roller, solves the problem of the accumulation of thickness at both ends when the roller with large thickness is wound and formed, and realizes the one-time forming of the fiber composite material roller. The forming device is simple to install and position, the yarn sheet positioning ring can be reused, the overrunning stroke is short during small angle winding, and a large thickness roller can be formed, the stress deformation is small, raw materials are saved, and efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the field of fiber composite material design and manufacturing, and particularly relates to a forming device and a forming method of a thick-wall multi-angle fiber composite material roller. Background Art

[0002] Fiber composite materials are increasingly used in various industries due to their excellent properties of light weight and high strength. In the textile field, compared with the metal working rolls used in traditional textile cross-lapping machines, fiber composite rolls have the advantages of low deflection, light weight, low rotational inertia, and high rotation speed. This puts forward requirements for the forming design of fiber composite textile rolls of different thicknesses, sizes, models and specifications.

[0003] However, there are no caps at both ends of the fiber composite textile roller. During the molding process, how to carry out continuous fiber winding on the straight tube section, especially how to achieve geodesic continuous winding during the molding of the composite roller with small angle winding, is a problem. When the thickness is large, how to solve the relatively fast accumulation of thickness at both ends during the continuous winding process to avoid affecting the winding line shape of the product section, and how to use multiple balls of yarn and wide yarn sheets to achieve large forward volume one-time molding are also problems to be solved. Summary of the invention

[0004] In view of this, the present invention aims to propose a forming device and a forming method for a thick-walled multi-angle fiber composite material roller, which realizes the continuous fiber geodesic winding forming of a headless straight fiber composite material roller, solves the problem of thickness accumulation at both ends during the winding forming of a roller with a large thickness, and realizes the one-time forming of a fiber composite material roller. The forming method is simple to install and position, the yarn sheet positioning ring can be reused, the overrunning stroke is short during small-angle winding, and a large-thickness roller can be formed, with small stress deformation, saving raw materials, reducing costs, and improving efficiency.

[0005] To achieve the above object, the present invention adopts the following technical solution: a method for forming a thick-walled multi-angle fiber composite material roller, specifically comprising the following steps:

[0006] (1) First, install the front yarn sheet positioning ring and the rear yarn sheet positioning ring at the matching positions at the front and rear ends of the core mold respectively.

[0007] (2) The core mold with the yarn sheet positioning ring installed is clamped through the front end positioning hole and the front end of the winding machine, and is connected and positioned through the rear end top hole and the rear end top of the winding machine, ensuring that the central axis of the core mold is at the same height, and the core mold and the winding machine are stably clamped, and the rotation of the core mold and the winding of the yarn sheet are realized through the multi-axis control of the winding machine;

[0008] (3) After molding is completed, the product is rotated and solidified by connecting and installing the front positioning hole and the rotation assembly of the curing furnace.

[0009] Furthermore, in step (1), a release agent is evenly applied to the core mold, the front yarn sheet positioning ring and the rear yarn sheet positioning ring, and winding molding is performed after the release agent is dry.

[0010] Furthermore, in step (2), during the winding process, the starting point and the dropping point of the longitudinal winding are respectively located on the outside of the yarn sheet positioning ring, ensuring that the inner dropping position of the yarn sheet is 50 mm away from the positioning needle, so as to realize geodesic winding of different winding angles on the headless straight tube section.

[0011] Furthermore, in step (2), when winding the thick-walled roller, for every time the thickness exceeds 10 mm, the yarn sheet positioning rings at both ends are fixed after the annular winding is completed, and the fibers at both ends are cut axially at the fiber cutting area 20 mm close to the positioning needle to form an incomplete wall thickness semi-finished fiber composite material. After the fibers in the fiber area after the cutting at both ends are cleaned up, the winding molding is continued. When the winding is completed, the fibers are fixed and the rotational curing molding is carried out.

[0012] A forming device for a thick-walled multi-angle fiber composite material roller comprises a core mold, a front end yarn sheet positioning ring, a front end positioning hole, a rear end top hole and a rear end yarn sheet positioning ring. The front end yarn sheet positioning ring and the rear end yarn sheet positioning ring are respectively installed at matching positions at the front and rear ends of the core mold. The front end of the core mold is provided with a front end positioning hole, and the rear end is provided with a rear end top hole.

[0013] Furthermore, the front end positioning hole is clamped with the front end of the winding machine, and the rear end top hole is connected and positioned with the rear end top of the winding machine.

[0014] Furthermore, the front yarn piece positioning ring and the rear yarn piece positioning ring have the same structure, both of which are composed of a positioning ring base and positioning needles, and a plurality of positioning needles are evenly distributed around the circumference of the positioning ring base.

[0015] Furthermore, the length of the positioning needle can be adjusted according to the wall thickness of the fiber composite material roller.

[0016] Furthermore, the positioning needle is connected and fixed by an adhesive and a pinhole of the positioning ring, and the tip portion is a rounded transition to avoid damaging the fiber.

[0017] Furthermore, positioning pins with a spacing of 8 mm are evenly distributed on the circumference of the positioning ring base.

[0018] Compared with the prior art, the forming device and forming method of a thick-walled multi-angle fiber composite material roller described in the present invention have the following beneficial effects:

[0019] (1) The forming device and forming method of a thick-walled multi-angle fiber composite material roller described in the present invention realize the continuous fiber geodesic winding forming of a headless straight fiber composite material roller, and solve the problem of thickness accumulation at both ends during winding forming of a roller with a large thickness, thereby realizing the one-time forming of the fiber composite material roller.

[0020] (2) The present invention designs a detachable yarn sheet positioning ring, on which detachable positioning pins are installed. The yarn sheet positioning ring is installed at both ends of a straight cylindrical mold without a head. During the winding molding process, after the continuous fibers are dropped at both ends, the fibers are fixed at the ends by the positioning pins, ensuring that the fibers are spread and dropped on the core mold along the geodesic line during the Y-axis movement of the winding machine through the X-axis rotation of the core mold, ensuring that the linear shape of the fibers continuously dropped on the core mold is stable during the Y-axis movement. Especially for winding at a small angle, the use of the hanging ring does not need to consider the overrunning stroke, which reduces the requirements for the mold length and deflection and saves raw materials.

[0021] (3) For thick-walled fiber composite material rollers of the present invention, when longitudinally forming, the wrap angles and turning angles at both ends will cause the thickness of the two end heads to increase faster than the thickness of the tube body. When a certain number of layers are wound, the stability of the product fiber near the thick area and the porosity and glue content of the product will be affected. The present invention solves the problem of rapid thickness increase during longitudinal forming of thick-walled rollers by designing a cutting process at the wire hanging ring after fixing the end heads, and the process design can be performed multiple times according to the thickness, thereby realizing the one-time forming of the fiber composite material roller.

[0022] (4) The forming device of the thick-walled multi-angle fiber composite material roller described in the present invention is simple to install and position. The positioning wire hanging ring is designed by the steps at both ends of the core mold, and the positioning wire hanging ring can be inserted from both ends to the steps.

[0023] (5) The yarn sheet positioning ring of the present invention can be reused, especially when winding at a small angle, the hanging nail fixes the fiber at the end, which greatly shortens the overrun stroke of small-angle winding, can form a large thickness roller, has little stress deformation, saves raw materials, reduces costs, and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a front view of a forming device for a thick-walled multi-angle fiber composite material roller according to the present invention;

[0026] Figure 2 It is a structural schematic diagram of the positioning ring base of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the yarn sheet positioning ring of the present invention;

[0028] Figure 4 It is a schematic diagram of the core mold end portion of a forming device for a thick-walled multi-angle fiber composite material roller according to the present invention;

[0029] Figure 5 It is a partial schematic diagram of a forming device for a thick-walled multi-angle fiber composite material roller according to the present invention;

[0030] Among them, 1-core mold, 2-front end yarn piece positioning ring, 3-fiber composite material roller, 4-front end positioning hole, 5-rear end top hole, 6-rear end yarn piece positioning ring, 7-positioning ring base, 8-positioning needle, 9-incomplete wall thickness of fiber composite material, 10-cutting area, 11-matching surface between core mold and positioning ring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0032] 1. Specific implementation method 1, see Figure 1-5 To illustrate the present embodiment, a thick-walled multi-angle fiber composite material roller comprises a core mold 1, a front end yarn sheet positioning ring 2, a front end positioning hole 4, a rear end top hole 5 and a rear end yarn sheet positioning ring 6, wherein the front end yarn sheet positioning ring 2 and the rear end yarn sheet positioning ring 6 are respectively installed at matching positions at the front and rear ends of the core mold 1, and the front end of the core mold 1 is provided with a front end positioning hole 4, and the rear end is provided with a rear end top hole 5.

[0033] The front end positioning hole 4 is clamped with the front end of the wrapping machine, and the rear end top hole 5 is connected and positioned with the rear end top of the wrapping machine. The front end positioning hole 4 is clamped with the front end of the wrapping machine to ensure that the core mold 1 does not rotate during the wrapping process.

[0034] The front yarn positioning ring 2 and the rear yarn positioning ring 6 have the same structure, both consisting of a positioning ring base 7 and positioning needles 8. A plurality of positioning needles 8 are evenly distributed around the positioning ring base 7. The yarn positioning ring is also called a positioning and hanging ring, which is mainly used for positioning and hanging fibers.

[0035] The length of the positioning needle 8 can be adjusted according to the wall thickness of the fiber composite material roller.

[0036] The positioning needle 8 is connected and fixed by an adhesive and a positioning ring pinhole, and the tip portion is a rounded transition to avoid damaging the fiber.

[0037] The yarn sheet positioning ring is composed of a positioning ring base 7 and a positioning needle 8 and is reusable. The positioning ring base 7 is evenly distributed with positioning needle holes with a center spacing of 8 mm in the circumferential direction. The length of the positioning needle 8 can be adjusted according to the wall thickness of the fiber composite material roller. It is connected and fixed with the positioning ring needle hole through 502 adhesive, and the tip part is a rounded transition to avoid damaging the fiber. The end face of the yarn sheet positioning ring is used in conjunction with the core mold 1 through the positioning ring matching surface 11, and the positioning ring matching surface 11 prevents the yarn sheet positioning ring from moving along the axial direction.

[0038] The yarn sheet positioning ring is a detachable yarn sheet positioning ring, and a detachable positioning pin 8 is installed on the positioning ring base 7. The yarn sheet positioning ring is installed at both ends of the headless straight cylindrical core mold 1. During the winding molding process, after the continuous fiber is dropped at both ends, the positioning pin 8 is used to fix the fiber at the end, ensuring that the fiber is spread along the geodesic line on the core mold 1 through the X-axis rotation of the core mold 1 during the Y-axis movement of the winding machine, ensuring that the linear shape of the fiber continuously spread on the core mold 1 is stable during the Y-axis movement, especially for small-angle winding, the use of the hanging ring does not need to consider the overrunning stroke, reduces the requirements for the mold length and deflection, and saves raw materials.

[0039] The forming device of the thick-walled multi-angle fiber composite material roller of the present invention is simple to install and position. The positioning wire hanging ring is designed by the steps at both ends of the core mold 1, and the positioning wire hanging ring can be inserted from both ends to the steps.

[0040] The method for forming a thick-walled multi-angle fiber composite material roller specifically comprises the following steps:

[0041] Step (1) First, install the front yarn piece positioning ring 2 and the rear yarn piece positioning ring 6 at the matching positions of the front and rear ends of the core mold 1 respectively. The core mold with the yarn piece positioning ring installed is connected and positioned with the front end positioning hole 4 and the rear end top hole 5 and the front end mounting chuck and the rear end top of the winding machine. After the front end winding machine mounting chuck is locked, a bolt is inserted into the front end positioning hole 4, and the bolt head is fixed by magnetic attraction with a directional magnet to prevent the bolt from falling out and the core mold 1 from rotating during the winding process. Ensure that the central axis of the core mold is at the same height, and the core mold 1 and the winding machine are stably clamped, and the rotation of the core mold and the winding of the yarn piece are realized through the multi-axis control of the winding machine.

[0042] The core mold 1, the front yarn piece positioning ring 2 and the rear yarn piece positioning ring 6 are evenly coated with a release agent, and winding molding is performed after the release agent is dry.

[0043] Step (2) The core mold 1 with the yarn sheet positioning ring installed is clamped through the front end positioning hole 4 and the front end of the winding machine, and is connected and positioned through the rear end top hole 5 and the rear end top of the winding machine, ensuring that the central axis of the core mold 1 is at the same height, and the core mold 1 and the winding machine are stably clamped, and the rotation of the core mold and the winding of the yarn sheet are realized through the multi-axis control of the winding machine;

[0044] During the winding process, the starting point and the dropping point of the longitudinal winding are respectively located on the outside of the yarn sheet positioning ring, ensuring that the inner dropping position of the yarn sheet is 50 mm away from the positioning needle 8, so as to realize geodesic winding at different winding angles on the straight section without a head. The fiber composite roller mainly bears a uniformly distributed radial load, requiring the roller to have a very high rigidity. The winding process involves a combination design of different angles of 5°-90°. When winding at a small longitudinal winding angle, the positive pressure acting on the roller will be significantly reduced, and the rubber content will increase accordingly. The fiber content of the roller of the same volume is significantly reduced, which affects the rigidity of the roller body. It is necessary to design a certain circumferential winding layer to increase the positive pressure acting on the roller and reduce the rubber content of the roller.

[0045] During winding and forming, the evenly distributed arrangement of the positioning needles 8 on the yarn sheet positioning ring can realize the positioning function of the yarn comb and the end of the product, and further inherit the yarn width of the winding machine on the core mold. In conjunction with the rotation of the core mold and the turning angle of the winding machine winding nozzle, the yarn width of the winding machine is kept unchanged through the positioning needles, avoiding the accumulation of multiple fiber bundles at different winding angles, especially at small angles.

[0046] In step (2), when winding a thick-walled roller, for every time the thickness exceeds 10 mm, the yarn sheet positioning rings at both ends must be fixed after the annular winding is completed, and the fibers at both ends must be cut axially at the fiber cutting area 10 20 mm away from the positioning needle 8 to form a fiber composite material with incomplete wall thickness semi-finished product 9. After cleaning up the fibers in the fiber area after the cutting at both ends, continue winding and forming. When the winding is completed, fix the fibers and perform rotational curing and forming.

[0047] At the same time, the positioning and yarn separation function of the positioning needle 8 greatly shortens the overrunning stroke during small-angle winding, and can quickly stabilize the fiber position under the action of the positioning needle 8 to achieve geodesic stable production. When the wall thickness of the fiber composite material roller is not more than 10mm, the winding layer is continuously wound and formed according to the designed winding layer until the end.

[0048] When winding thick-walled rollers, as the longitudinal winding progresses, the thickness of the fibers at the starting and dropping points at both ends accumulates when they are wrapped around the wrap angle. The thickness at both ends increases relatively quickly, and a gradual thickening area is formed near the two ends. The resin content is relatively large, and it is easy to form fiber overhead, resulting in more gaps, which affects the performance.

[0049] Therefore, for every 10mm thickness increase, a 50mm wide high temperature resistant tape should be used to wrap 3 turns inward from the positioning pin 8 after the circumferential winding is completed to fix the fibers at the positioning rings of the yarn sheets at both ends. After fixing, the fibers are cut circumferentially with a wallpaper knife 20mm inward near the positioning pin. After cleaning the fibers at both ends, the winding molding is continued. When the longitudinal and circumferential directions of the fiber composite material roller are molded on this basis, the problems of local accumulation and high resin content are avoided, and the one-time molding of the thick-walled fiber composite material roller can be achieved, and the performance uniformity of the thick-walled roller and the linear consistency of the same diameter in the circumferential direction are guaranteed. At the end of the winding, the fibers are fixed with tape to complete the molding of the fiber composite material roller. The front end positioning hole 4 and the hole on the curing rotary joint are connected to realize rotary high temperature curing molding.

[0050] After the molding of step (3) is completed, the product is rotated and solidified by connecting and installing the front positioning hole 4 and the rotation assembly of the curing furnace.

[0051] For the thick-walled fiber composite material roller of the present invention, when longitudinally forming, the wrap angles and turning angles at both ends will cause the thickness of the two end heads to increase faster than the thickness of the barrel body. When winding to a certain number of layers, it will affect the stability of the product fiber near the thick area and the porosity and glue content of the product. The present invention solves the problem of rapid thickness increase of thick-walled rollers during longitudinal forming by designing a cutting process at the wire hanging ring after fixing the end heads, and the process design can be performed multiple times according to the thickness, thereby realizing the one-time forming of the fiber composite material roller.

[0052] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A method for forming a thick-walled multi-angle fiber composite material roller, characterized in that: The specific steps include: (1) First, the front yarn sheet positioning ring (2) and the rear yarn sheet positioning ring (6) are respectively installed at the matching positions at the front and rear ends of the core mold (1). (2) The core mold (1) with the yarn sheet positioning ring installed is clamped with the front end of the winding machine through the front end positioning hole (4), and is connected and positioned with the rear end of the winding machine through the rear end top hole (5), so as to ensure that the central axis of the core mold (1) is located at the same height, and the core mold (1) and the winding machine are stably clamped, and the rotation of the core mold and the winding of the yarn sheet are realized through the multi-axis control of the winding machine; (3) After the molding is completed, the product is rotated and solidified by connecting and installing the front positioning hole (4) and the rotation assembly of the curing furnace; The molding device used in the molding method of a thick-walled multi-angle fiber composite material roller comprises a core mold (1), a front end yarn sheet positioning ring (2), a front end positioning hole (4), a rear end top hole (5) and a rear end yarn sheet positioning ring (6), wherein the front end yarn sheet positioning ring (2) and the rear end yarn sheet positioning ring (6) are respectively installed at matching positions at the front and rear ends of the core mold (1), and the front end of the core mold (1) is provided with a front end positioning hole (4) and the rear end is provided with a rear end top hole (5); The front yarn piece positioning ring (2) and the rear yarn piece positioning ring (6) have the same structure, both consisting of a positioning ring base (7) and positioning needles (8), and a plurality of positioning needles (8) are evenly distributed around the circumference of the positioning ring base (7); The yarn sheet positioning ring is a detachable yarn sheet positioning ring, and a detachable positioning pin (8) is installed on the positioning ring base (7). The yarn sheet positioning ring is installed at both ends of a straight cylindrical core mold (1) without a head. After the continuous fiber is dropped at both ends during the winding process, the positioning pin (8) fixes the fiber at the end, ensuring that the fiber is spread and dropped on the core mold (1) along the geodesic line through the X-axis rotation of the core mold (1) during the Y-axis movement of the winding machine, ensuring that the linear shape of the fiber continuously dropped on the core mold (1) is stable during the Y-axis movement; When winding a thick-walled roller, for every 10 mm thickness increase, the yarn pieces at both ends are fixed at the positioning rings after the annular winding is completed, and the fibers at both ends are axially cut at the fiber cutting area (10) 20 mm away from the positioning needle (8) to form a fiber composite material with an incomplete wall thickness semi-finished product (9). After cleaning the fibers at the rear area after the fibers are cut at both ends, the winding is continued until the winding is completed, the fibers are fixed, and the rotational curing is performed.

2. The method for forming a thick-walled multi-angle fiber composite material roller according to claim 1, characterized in that: In step (1), a release agent is evenly applied to the core mold (1), the front yarn sheet positioning ring (2) and the rear yarn sheet positioning ring (6), and winding molding is performed after the release agent is dry.

3. The method for forming a thick-walled multi-angle fiber composite material roller according to claim 1, characterized in that: In step (2), during the winding process, the starting point and the dropping point of the longitudinal winding are respectively located on the outside of the yarn sheet positioning ring, ensuring that the inner side of the yarn sheet The yarn dropping position is 50mm away from the positioning needle (8) to achieve geodesic winding at different winding angles on the headless straight tube section.

4. The method for forming a thick-walled multi-angle fiber composite material roller according to claim 1, characterized in that: The length of the positioning needle (8) is adjusted according to the wall thickness of the fiber composite material roller.

5. The method for forming a thick-walled multi-angle fiber composite material roller according to claim 1, characterized in that: The positioning needle (8) is connected and fixed by means of an adhesive and a positioning ring pinhole, and the tip portion is a rounded transition to avoid damaging the fiber.

6. The method for forming a thick-walled multi-angle fiber composite material roller according to claim 1, characterized in that: Positioning pins (8) with a spacing of 8 mm are evenly distributed in the circumference of the positioning ring base (7).

Images