A continuous fiber reinforced cross rib metal plate forming device and method

Abstract

The present invention belongs to the technical field of metal matrix composite materials, and specifically relates to a continuous fiber reinforced cross-ribbed metal plate forming equipment and method, the purpose of which is to solve the problem that the prior art can only prepare ribbed structural plates reinforced with longitudinal unidirectional fibers, the structural plates have mechanical anisotropy, are prone to premature failure and damage in the transverse direction, and cannot fully exert the reinforcing effect of reinforcing fibers and ribs. The present invention adopts a cross-wound fiber duct mechanism to synchronously lay reinforcing fibers, and directly prepares cross-rib reinforced metal structural plates using a casting and rolling process, so that reinforcing fibers with excellent tensile properties are arranged on the reinforcing ribs of the structural plates, and the tensile capacity of the reinforcing fibers is fully exerted, and the equipment has the advantages of compact structure, simple preparation process, and strong performance of the structural plate.

Description

Technical Field

[0001] The invention belongs to the technical field of metal matrix composite materials, and in particular relates to a continuous fiber reinforced cross-rib metal plate forming device and method. Background Art

[0002] Continuous fiber reinforced metal matrix composite material is a composite material prepared with continuous fiber (such as carbon fiber, glass fiber, etc.) as the reinforcement phase and aluminum alloy, magnesium alloy and other metals as the matrix phase. It has the advantages of high specific strength, specific stiffness, axial tensile strength and wear resistance, excellent high temperature resistance and low thermal expansion coefficient, good electrical conductivity, thermal conductivity, fatigue resistance, and good dimensional stability in humid or radiation environments. It is an ideal lightweight and high-strength material. For example, the density of carbon fiber reinforced aluminum matrix composite material is lower than that of aluminum alloy, but the modulus is 2 to 4 times higher than that of aluminum alloy. At 250°C, its tensile strength can still maintain 81% of the room temperature tensile strength, and its fatigue strength is 38% higher than that of aluminum alloy. The manufactured components have light weight, good rigidity, small wall thickness, and high stability, which can greatly improve the equipment capacity and loading capacity. In particular, the tensile strength of carbon fiber can reach 3 to 5GPa. Arranging high-strength carbon fiber in the tensile part of the structural plate can greatly improve the supporting capacity of the support plate.

[0003] After searching the literature of the prior art, it was found that the Chinese invention patent "A continuous carbon fiber reinforced aluminum-based structural plate casting and rolling forming equipment and method" (application number 201811566178.7) disclosed a device and method for preparing a continuous carbon fiber reinforced aluminum-based structural plate with reinforced ribs by casting and rolling, using the pouring front box to lay the continuous carbon fiber in the annular groove opened on the lower roller. However, due to technical limitations, only ribbed structural plates with longitudinal unidirectional fiber reinforcement can be produced, and there is no reinforcement of reinforcing fibers and ribs in the transverse direction, resulting in the mechanical anisotropy of the structural plate, which is prone to premature failure and damage in the transverse direction, and cannot give full play to the reinforcing effect of reinforcing fibers and ribs. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a continuous fiber reinforced cross-rib metal plate forming device and method to solve the problem that the prior art can only prepare ribbed structural plates reinforced with fibers in a longitudinal unidirectional direction, the structural plates have mechanical anisotropy, are prone to premature failure and damage in the transverse direction, and cannot fully exert the strengthening effect of the reinforcing fibers and ribs.

[0005] To achieve the above-mentioned purpose, the present invention provides a continuous fiber reinforced cross-rib metal plate forming equipment, including: a frame, a lower roller, an upper roller, a fiber roller, a fiber duct, a guide rail, a guide rail bracket, and a casting front box, characterized in that the lower roller, the upper roller, and the fiber roller are all installed on the frame; the upper roller surface is provided with cross-connected grooves for forming reinforcing ribs of the structural plate; the guide rail is fixed on the guide rail bracket, and is composed of two long strips of rails parallel to the axis of the upper roller; the fiber duct is installed on the guide rail, and during the production process, as the upper roller rotates, the fiber duct is synchronously moved on the guide rail along the axis direction of the upper roller Reciprocating sliding ensures that the wire outlet at the lower end of the fiber duct is always inserted into the groove of the upper roller, so that the fiber is laid in the groove of the upper roller; the guide rail bracket is installed on the frame, and the height can be adjusted up and down along the frame to adjust the height of the fiber duct; the fibers on the fiber roller pass through the fiber duct, pass out from the wire outlet at the lower end of the fiber duct, and are laid in the groove of the upper roller; the upper and lower surfaces of the pouring front box are arc-shaped, respectively abutting the roller surfaces of the upper and lower rollers to prevent leakage of molten metal, and the pointed side wings on both sides of the pouring gate are inserted into the roller gap and abutting the roller surfaces of the upper and lower rollers to prevent lateral leakage of the molten metal.

[0006] Furthermore, the fiber guide tube is equipped with a stepping motor for moving and controlling the position of the fiber guide tube.

[0007] Furthermore, the guide rail has a track in the form of a rack structure, which is engaged with a stepping motor on the fiber guide tube and is used for moving and controlling the position of the fiber guide tube.

[0008] The present invention also provides a method for forming a continuous fiber reinforced cross-rib metal plate, comprising the following steps:

[0009] ① Adjust the gap between the upper and lower rollers according to the process requirements;

[0010] ② Place the fiber roll on the fiber roller, guide the fibers on the fiber roll through the fiber guide tube, pass through the outlet and fix them on the upper roller;

[0011] ③ By adjusting the height of the guide rail bracket and the position of the fiber guide tube on the guide rail, the outlet at the lower end of the fiber guide tube is inserted into the groove of the upper roller;

[0012] ④ Install the pouring front box so that the upper and lower arc surfaces of the pouring front box gate are respectively in contact with the roller surfaces of the upper and lower rollers, and the pointed side wings on both sides of the gate are inserted into the roller gap to prevent the molten metal from leaking;

[0013] ⑤Heat and melt the metal to a predetermined temperature;

[0014] ⑥ Turn on the casting and rolling mill, and make the upper and lower rollers start to rotate at the set speed. At the same time, make the fiber guide tube slide back and forth synchronously on the guide rail to ensure that the outlet of the lower end of the fiber guide tube is always inserted into the groove of the upper roller, and lay the fiber in the groove of the upper roller;

[0015] ⑦ Pour the molten metal into the front pouring box to start the casting and rolling of the continuous fiber reinforced cross rib metal plate.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: the present invention adopts a cross-wire fiber duct mechanism to synchronously lay reinforcing fibers, and utilizes a casting and rolling process to directly prepare a metal structural plate reinforced with cross ribs, so that reinforcing fibers with excellent tensile properties are arranged on the reinforcing ribs of the structural plate, and the tensile capacity of the reinforcing fibers is fully exerted. It has the advantages of compact structure and simple process, and solves the problem that the prior art can only prepare ribbed structural plates reinforced with longitudinal unidirectional fibers, and the structural plates have mechanical anisotropy, are prone to premature failure and damage in the lateral direction, and cannot fully exert the role of the reinforcing fibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram (cross-sectional view) of the continuous fiber reinforced cross-rib metal plate forming equipment of the present invention.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the pouring front box of the present invention.

[0019] Figure 3 It is a schematic diagram of the assembly structure of the upper roller, the fiber guide tube and the guide rail of the present invention.

[0020] Figure 4 The figure is a structural diagram of a continuous fiber reinforced cross-ribbed metal plate prepared according to the present invention. DETAILED DESCRIPTION

[0021] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description in conjunction with the accompanying drawings. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of protection of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a continuous fiber reinforced cross-rib metal plate forming equipment includes: a frame 1, a lower roller 2, an upper roller 3, a fiber roller 4, a fiber duct 5, a guide rail 6, a guide rail bracket 7, and a casting front box 8, characterized in that the lower roller 2, the upper roller 3, and the fiber roller 4 are all installed on the frame 1; the upper roller 3 is provided with a cross-connected groove 31 on the surface for forming the reinforcing ribs 91 of the structural plate 9; the guide rail 6 is fixed on the guide rail bracket 7, and is composed of two long strips of rails parallel to the axis of the upper roller 3; the fiber duct 5 is installed on the guide rail 6, and during the production process, as the upper roller 3 rotates, the fiber duct 5 slides synchronously back and forth on the guide rail 6 along the axis direction of the upper roller 3 to ensure The wire outlet at the lower end of the fiber duct 5 is always inserted into the groove 31 of the upper roller 3, so that the carbon fiber 10 is laid in the groove 31 of the upper roller 3; the guide rail bracket 7 is installed on the frame 1, and the height can be adjusted up and down along the frame 1 to achieve the adjustment of the height of the fiber duct 5; the carbon fiber 10 on the fiber roller 4 passes through the fiber duct 5, passes out from the wire outlet at the lower end of the fiber duct 5, and is laid in the groove 31 of the upper roller 3; the upper and lower surfaces of the pouring front box 8 are arc-shaped, respectively abutting against the roller surfaces of the upper roller 3 and the lower roller 2 to prevent leakage of the molten metal, and the pointed side wings 81 on both sides of the pouring gate are inserted into the roller gap and abut against the roller surfaces of the upper roller 3 and the lower roller 2 to prevent lateral leakage of the molten metal.

[0023] The fiber guide tube 5 is equipped with a stepping motor for moving and controlling the position of the fiber guide tube 5 .

[0024] The guide rail 6 has a track in the form of a rack structure, which is engaged with a stepping motor on the fiber guide tube 5 and is used for moving and controlling the position of the fiber guide tube 5 .

[0025] The groove 31 has a width of 9 mm, a depth of 13 mm, and a draft angle of 5°.

[0026] The carbon fiber 10 is T700 carbon fiber.

[0027] The present invention also provides a method for forming a continuous fiber reinforced cross-rib metal plate, comprising the following steps:

[0028] ① According to the process requirements, adjust the gap between the rollers to 0.8mm, that is, adjust the gap between the upper roller 3 and the lower roller 2 to 0.8mm;

[0029] ② Place the T700 carbon fiber roll on the fiber roller 4, guide the carbon fiber 10 on the fiber roll through the fiber guide tube 5, pass through the outlet and fix it on the upper roller 3;

[0030] ③ Adjust the height of the guide rail bracket 7 and the position of the fiber guide tube 5 on the guide rail 6 so that the outlet of the fiber guide tube 5 at the lower end is inserted into the groove 31 of the upper roller 3;

[0031] ④ Install the pouring front box 8 so that the upper and lower arc surfaces of the pouring gate of the pouring front box 8 are respectively in contact with the roller surfaces of the upper roller 3 and the lower roller 2, and the pointed side wings 81 on both sides of the pouring gate are inserted into the roller gap to prevent the molten metal from leaking;

[0032] ⑤Heat and melt the 5052 aluminum alloy to 690℃;

[0033] ⑥ Turn on the casting and rolling mill, rotate the upper roller 3 and the lower roller 2 at a speed of 1 revolution per minute, and at the same time, make the fiber guide tube 5 slide back and forth synchronously on the guide rail 6 at a speed of one cycle of 30 seconds, ensure that the outlet of the lower end of the fiber guide tube 5 is always inserted into the groove 31 of the upper roller 3, and lay the carbon fiber 10 in the groove 31 of the upper roller 3;

[0034] ⑦ Pour the molten 5052 aluminum alloy metal into the front pouring box 8 to start the casting and rolling of the continuous fiber reinforced cross rib metal plate.

[0035] The structure of the continuous fiber reinforced cross rib metal plate prepared in this embodiment is shown in FIG. Figure 4 shown.

[0036] The present invention can be embodied in various forms without departing from the spirit or essence of the invention, so it should be understood that the above embodiments are not limited to the foregoing details, but should be broadly interpreted within the scope defined by the claims, and therefore changes and modifications that fall within the scope of the claims or their equivalents should be covered by the claims.

Claims

1. A method for forming a continuous fiber reinforced cross-ribbed metal plate, using a continuous fiber reinforced cross-ribbed metal plate forming device, comprising: A frame (1), a lower roller (2), an upper roller (3), a fiber roller (4), a fiber guide tube (5), a guide rail (6), a guide rail bracket (7), and a casting front box (8), wherein the lower roller (2), the upper roller (3), and the fiber roller (4) are all mounted on the frame (1); a cross-connected groove (31) is provided on the surface of the upper roller (3) for forming a reinforcing rib (91) of a structural plate (9); the guide rail (6) is fixed on the guide rail bracket (7) and is composed of two long strips of rails parallel to the axis of the upper roller (3); the fiber guide tube (5) is mounted on the guide rail (6), and during the production process, as the upper roller (3) rotates, the fiber guide tube (5) synchronously reciprocates on the guide rail (6) along the axis direction of the upper roller (3), ensuring that the outlet at the lower end of the fiber guide tube (5) is always inserted in the The fiber (10) is placed in the groove (31) of the upper roller (3); the guide rail bracket (7) is installed on the frame (1) and can be adjusted up and down along the frame (1) to adjust the height of the fiber guide tube (5); the fiber (10) on the fiber roller (4) passes through the fiber guide tube (5), passes out from the outlet at the lower end of the fiber guide tube (5), and is placed in the groove (31) of the upper roller (3); the upper and lower surfaces of the pouring front box (8) are arc-shaped, respectively abutting against the roller surfaces of the upper roller (3) and the lower roller (2) to prevent the metal liquid from leaking, and the pointed side wings (81) on both sides of the pouring gate are inserted into the roller gap and abutting against the roller surfaces of the upper roller (3) and the lower roller (2) to prevent the metal liquid from leaking laterally, characterized in that it includes the following steps: ① adjusting the gap between the rollers according to the process requirements, that is, adjusting the gap size between the upper roller (3) and the lower roller (2); ② placing the fiber roll on the fiber roller (4), guiding the fiber (10) through the fiber guide tube (5), passing through the fiber outlet and fixing it on the upper roller (3); ③ By adjusting the height of the guide rail bracket (7) and the position of the fiber guide tube (5) on the guide rail (6), the outlet of the fiber guide tube (5) at the lower end is inserted into the groove (31) of the upper roller (3); ④ Install the pouring front box (8) so that the upper and lower arc surfaces of the pouring gate of the pouring front box (8) are respectively in contact with the roller surfaces of the upper roller (3) and the lower roller (2), and the pointed side wings (81) on both sides of the pouring gate are inserted into the roller gap to prevent the metal liquid from leaking; ⑤Heat and melt the metal to a predetermined temperature; ⑥ The casting and rolling mill is turned on, and the upper roller (3) and the lower roller (2) begin to rotate at a set speed. At the same time, the fiber guide tube (5) is synchronously reciprocated on the guide rail (6) to ensure that the outlet of the lower end of the fiber guide tube (5) is always inserted into the groove (31) of the upper roller (3), and the fiber (10) is laid in the groove (31) of the upper roller (3); ⑦ Pour molten metal into the front pouring box (8) to start the casting and rolling of the continuous fiber reinforced cross rib metal plate.

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