Method for manufacturing a preform for a pipe rack

Abstract

The present application relates to the technical field of three-dimensional weaving, and specifically relates to a preparation method of a through-pipe support preform, which overcomes the problems of poor connection strength between a through pipe and a bottom plate and poor preform form caused by the existing process. The preparation process comprises the following steps: a. horizontally arranging a three-dimensional weaving machine and setting it as a bottom plate weaving machine, arranging another three-dimensional weaving machine as a through pipe weaving machine, making the included angle between the through pipe weaving machine and the horizontal plane consistent with the included angle between the through pipe on the preform and the bottom plate; manufacturing a preform mold; b. calculating weaving parameters according to the size of the bottom plate and the through pipe; c. hanging yarns from the mold to the bottom plate weaving machine according to the bottom plate weaving parameters; d. weaving the flat plate area of the bottom plate to the starting position of the upper half edge of the through pipe; e. gradually moving the yarns in the through pipe area of the bottom plate weaving machine to the through pipe weaving machine, starting to weave the through pipe, and continuously weaving the bottom plate in the non-through pipe area; f. when weaving to the starting position of the lower half edge of the through pipe, gradually moving the yarns in the through pipe area of the through pipe weaving machine to the bottom plate weaving machine; and g. weaving the remaining flat plate area of the bottom plate to the end of weaving.

Description

Technical Field

[0001] This invention relates to the field of three-dimensional braiding technology, specifically a method for preparing a prefabricated tube rack. Background Technology

[0002] A composite material component, with a structure similar to an attached Figure 1 Or attached Figure 2 The structure shown has a base plate and a through pipe, with attachments Figure 1 It is a single-pass pipe, with... Figure 2 As a multi-port pipe, and as a composite material component, it has an internal pipe frame prefabricated body made of carbon fiber yarn or glass fiber yarn in three dimensions, and a resin or ceramic wrapping the prefabricated body. The composite material component meets people's requirements for the mechanical strength, temperature resistance and corrosion resistance of the product, and overcomes the problem that single material components may be insufficient in a certain performance.

[0003] The existing method for manufacturing precast pipe supports involves first weaving the base plate and the pipes separately in three dimensions. The woven base plate has through holes, and then the perimeter of one end of the pipe is sewn to the through holes on the base plate. Because the pipes and the base plate are only connected by stitches on a local surface, and the pipes and the base plate are not woven as a whole, the connection strength between the pipes and the base plate is poor, and the overall shape of the precast body is also poor. Both of these defects have an adverse effect on the subsequent component production and the final component quality. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a precast pipe support structure, which overcomes the problems of poor connection strength between the pipe and the base plate and poor overall shape of the existing precast structure.

[0005] The technical solution adopted by this invention to solve its technical problem is: a method for preparing a prefabricated tube support, wherein the prefabricated body has a base plate and a tube, both of which are made of yarn through three-dimensional weaving, and the prefabricated body has the following preparation process:

[0006] a. Horizontally set one three-dimensional braiding machine with spindles arranged in a square ring and designate it as a base plate braiding machine. Set another three-dimensional braiding machine with spindles arranged in a circular ring as a tube braiding machine, so that the angle between the spindle table of the tube braiding machine and the horizontal plane is consistent with the angle between the tube on the preform and the base plate. Make a mold for the preform and place the mold on the mold frame.

[0007] b. Calculate the weaving parameters of the base plate and the through pipe according to their dimensions, and fix the excess spindles on the three-dimensional weaving machine according to the weaving parameters of the base plate and the through pipe;

[0008] c. Hang the yarn from the mold onto the base plate weaving machine according to the base plate weaving parameters;

[0009] d. From the braided base plate flat area to the starting position of the upper half edge of the conduit;

[0010] e. Gradually move the yarn from the tube-through area on the base plate braiding machine to the tube-through braiding machine and begin braiding the tube-through area; continue braiding the base plate in the non-tube-through area.

[0011] f. Once the yarn has been braided to the starting position of the lower half edge of the tube, gradually move the yarn in the tube braiding area on the tube braiding machine to the base plate braiding machine;

[0012] g. Continue weaving the remaining flat area of ​​the base plate until the weaving is finished.

[0013] The aforementioned upper and lower halves of the tube refer to the arched upper half and lower half of the cylindrical tube, which are divided by a virtual plane containing the axis of the tube.

[0014] Specifically, if the preform has two or more tubes, repeating steps c to f once before step g completes the weaving of one tube.

[0015] Specifically, if the angle of inclination of the next tube on the base plate is different from that of the previous tube on the base plate, the position of the tube braiding machine needs to be changed before repeating steps c to f so that the angle between the tube braiding machine and the base plate braiding machine is consistent with the angle between the tube and the base plate. The tube refers to the next tube.

[0016] Specifically, if the total number of yarns required for the tube is greater than the number of yarns in the tube-passing area on the base plate braiding machine, then step c also includes the process of transferring the excess yarns from the mold to the tube-passing braiding machine.

[0017] The beneficial effects of the present invention are as follows: The method for preparing the prefabricated tube frame of the present invention makes the yarn of the tube originate from the base plate, and the tube and the base plate are integrated into a whole by a three-dimensional weaving method. The base plate part and the tube part are woven by two three-dimensional weaving machines with the spindle tables set at an angle. The prefabricated tube and the base plate have good connection strength, and the whole prefabricated body has stable shape and high dimensional accuracy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the shape of a conduit rack with a conduit.

[0019] Figure 2 This is a schematic diagram of the shape of a conduit rack with two conduits;

[0020] Figure 3 This is a schematic diagram of the weaving process of the present invention;

[0021] Figure 4 This is a schematic diagram of yarn movement when braiding the upper half of the tube;

[0022] Figure 5 This is a schematic diagram of yarn transfer when braiding the lower half of the tube according to the present invention.

[0023] In the diagram: 1. Base plate, 2. Through pipe. Detailed Implementation

[0024] The technical features of this invention are further illustrated by the following embodiments, but the scope of protection of this invention is not limited to the following embodiments.

[0025] Appendix Figure 1 It is a pipe rack with a through pipe, attached Figure 3 , 4 Figure 5 shows the schematic diagram of the manufacturing process of this single-pipe support.

[0026] A method for preparing a prefabricated pipe support structure, the prefabricated structure having a base plate 1 and a pipe 2, both the base plate 1 and the pipe 2 being three-dimensionally woven from yarn, which can be plant fiber yarn, carbon fiber yarn or glass fiber yarn, and the prefabricated structure having the following preparation process:

[0027] a. Horizontally set one three-dimensional braiding machine with spindles arranged in a square ring and designate it as a base plate braiding machine. Set another three-dimensional braiding machine with spindles arranged in a circular ring as a tube braiding machine. Make the angle between the spindle table of the tube braiding machine and the horizontal plane consistent with the angle between the tube 2 on the preform and the base plate 1. Make a mold for the preform and place the mold on the mold frame.

[0028] b. Calculate the weaving parameters of base plate 1 and through pipe 2 based on their dimensions, and fix the excess spindles on the three-dimensional weaving machine based on the weaving parameters of base plate 1 and through pipe 2.

[0029] c. According to the weaving parameters of base plate 1, the yarn is hung from the mold onto the base plate weaving machine. If the total number of yarns required for tube 2 is greater than the number of yarns in the tube area on the base plate weaving machine, the excess yarn is hung from the mold onto the tube weaving machine.

[0030] d. From the flat area of ​​the braided base plate 1 to the starting position of the upper half of the pipe 2, the starting position of the upper half of the pipe 2 is the junction point between the uppermost part of the outer wall of the root and the base plate 1, as shown in the attached diagram. Figure 3 As shown;

[0031] e. Gradually transfer the yarn from the tube-through area 2 on the base plate braiding machine to the tube-through braiding machine to begin braiding the tube. Continue braiding the base plate 1 in the non-tube-through areas, as shown in the attached diagram. Figure 4 As shown;

[0032] f. Once the weaving reaches the starting position of the lower half of tube 2, gradually transfer the yarn from the tube 2 area on the tube braiding machine to the base plate braiding machine, as shown in the attached diagram. Figure 5 As shown;

[0033] g. Weave the remaining flat area of ​​base plate 1 until the weaving is finished. After weaving, cut the yarn and remove the fabric from the mold.

[0034] If it is woven, see attached. Figure 2 For the two-way pipe support, repeat steps c to f once before step g, that is, add a braid for pipe 2. Furthermore, due to the attached... Figure 2 If the two tubes 2 in the process have different inclination angles from the base plate 1, then the position of the tube braiding machine needs to be changed before repeating steps c to f so that the angle between the tube braiding machine and the base plate braiding machine and the angle between the tube 2 and the base plate 1 are consistent.

[0035] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A method for preparing a prefabricated pipe support, the prefabricated body having a base plate and a pipe, wherein both the base plate and the pipe are three-dimensionally woven from yarn, characterized in that: The preform has the following preparation process: a. Horizontally set one three-dimensional braiding machine with spindles arranged in a square ring and designate it as a base plate braiding machine. Set another three-dimensional braiding machine with spindles arranged in a circular ring as a tube braiding machine, so that the angle between the spindle table of the tube braiding machine and the horizontal plane is consistent with the angle between the tube on the preform and the base plate. Make a mold for the preform and place the mold on the mold frame. b. Calculate the braiding parameters of the base plate and the through pipe based on their dimensions; c. Hang the yarn from the mold onto the base plate weaving machine according to the base plate weaving parameters; d. From the braided base plate flat area to the starting position of the upper half edge of the conduit; e. Gradually move the yarn from the tube-through area on the base plate braiding machine to the tube-through braiding machine and begin braiding the tube-through area; continue braiding the base plate in the non-tube-through area. f. Once the yarn has been braided to the starting position of the lower half edge of the tube, gradually move the yarn in the tube braiding area on the tube braiding machine to the base plate braiding machine; g. Continue weaving the remaining flat area of ​​the base plate until the weaving is finished; If the preform has two or more tubes, repeat steps c to f once before step g to complete the weaving of one tube; If the angle of inclination of the next braided tube on the base plate is different from that of the previous braided tube on the base plate, the position of the tube braiding machine needs to be changed before repeating steps c to f so that the angle between the tube braiding machine and the base plate braiding machine is consistent with the angle between the tube and the base plate.

2. The method for preparing the prefabricated pipe rack according to claim 1, characterized in that: Step b also includes a process of fixing excess spindles on the three-dimensional braiding machine according to the braiding parameters of the base plate and the through tube.

3. The method for preparing the prefabricated pipe rack according to claim 1, characterized in that: If the total number of yarns required for the tube is greater than the number of yarns in the tube-passing area on the base plate braiding machine, then step c also includes the process of transferring the excess yarns from the mold to the tube-passing braiding machine.

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