Electromagnetic positioning device for vacuum infusion forming of composite material structure

Abstract

The utility model relates to an electromagnetic positioning device for vacuum infusion forming of a composite material structure, which is characterized in that a plurality of detachable electromagnetic generators are arranged on a composite material forming die, and magnetic conductive blocks matched with the electromagnetic generators are embedded in the composite material forming die, so that the electromagnetic generators and the magnetic conductive blocks form a magnetic circuit; each electromagnetic generator comprises a shell and a wire, an electromagnetic coil is arranged in the shell, the wire penetrates through the shell and then is connected with the electromagnetic coil, and a forming insert matched with the magnetic conductive block is arranged at one end of the shell; the shell is of a hollow structure, a coil fixing rod is arranged in the middle of the shell, guide positioning strips are symmetrically arranged on the two sides of the coil fixing rod and used for guiding the electromagnetic coil to be fixedly wound on the coil fixing rod, and a silica gel protection layer is arranged at one end of the coil fixing rod.

Description

Technical Field

[0001] The utility model relates to the technical field of composite material forming processes, specifically an electromagnetic positioning device for vacuum infusion molding of composite structures, and particularly an electromagnetic positioning device for a composite material forming mold with a porous groove structure, which is used to solve the sealing and demolding problems of hole groove forming. Background Art

[0002] In the forming of composite material structures, there are often many dense hole groove structures. For example, when the end of a cylindrical structure is butted with other structures, sometimes several bolt holes are arranged on the end face. To ensure the structural strength and facilitate connection, the bolt holes need to extend to the circumferential direction of the cylinder body, forming a large number of hole grooves. When using the vacuum infusion molding process, it is necessary to install protruding hole groove forming inserts at all hole groove parts on the forming mold so that the fibers are laid along the inserts. After resin infusion and curing, the hole groove shape is formed at the insert parts. Currently, these hole groove forming inserts are generally connected to the mold body by bolts.

[0003] Since the vacuum infusion molding has high requirements for the sealing of the mold, it is very difficult to ensure airtightness during vacuum pumping for the screw holes opened on a large number of inserts, and rework is often required. Moreover, since the inserts need to be disassembled and assembled frequently, it not only increases a lot of workload, but also causes deformation and misalignment, affecting the product quality and demolding effect.

[0004] Therefore, there is an urgent need in the market for a device for vacuum infusion molding of composite structures to solve the problems of sealing and difficult demolding. Summary of the Invention

[0005] The purpose of the utility model is to provide an improved electromagnetic positioning device for vacuum infusion molding of composite structures. Through the improvement of the structure, the problems of air leakage of the forming mold, inconvenient disassembly and assembly of the forming inserts, and difficult demolding are solved, and the production efficiency and product quality are significantly improved.

[0006] To achieve the above purpose, the technical solution of the utility model is: an electromagnetic positioning device for vacuum infusion molding of composite structures, mainly including a composite material forming mold, characterized in that: several detachable electromagnetic generators are arranged on the composite material forming mold, and a magnetic conduction block is embedded in the composite material forming mold and cooperates with the electromagnetic generator, so that a magnetic circuit is formed between the electromagnetic generator and the magnetic conduction block; each electromagnetic generator includes a housing and a wire. An electromagnetic coil is arranged in the housing, and the wire passes through the housing and is connected to the electromagnetic coil. One end of the housing is provided with a forming insert that cooperates with the magnetic conduction block; the housing is a hollow structure, a coil fixing rod is arranged in the middle of the housing, and symmetric guiding positioning strips are arranged on both sides of the coil fixing rod to guide the electromagnetic coil to be fixedly wound around the coil fixing rod, and a silica gel protective layer is arranged at one end of the coil fixing rod.

[0007] Preferably, one end of the coil fixing rod is fixedly connected to the bottom of the housing, and the other end is the fixed end of the silica gel protective layer, and the fixed end of the silica gel protective layer is conical.

[0008] Furthermore, the silica gel protective layer cooperates with the housing to seal the electromagnetic coil in the housing.

[0009] Furthermore, the composite material forming die is provided with 2-5 slot holes matching the shape of the housing. The slot holes are provided with magnetic conduction blocks, and the magnetic conduction blocks are provided with positioning convex blocks. The bottom of the housing is provided with positioning grooves matching the positioning convex blocks.

[0010] Furthermore, one end of the coil fixing rod passes through the silica gel protective layer, and 2-5 mm of the fixed end of the silica gel protective layer is exposed for fixing the forming insert. One side of the forming insert is provided with a positioning slot hole matching the coil fixing rod.

[0011] Furthermore, 2-5 wires are combined into a wire group. The wire group is connected to a power supply through a switch, and the power supply is provided with a leakage protection device.

[0012] Compared with the prior art, the technical solution of the present utility model includes not only the improvement of the overall technical solution, but also many improvements in details. Specifically, it has the following beneficial effects:

[0013] In the improvement scheme of the present utility model, the composite material forming die is provided with a plurality of detachable electromagnetic generators, and the composite material forming die is internally provided with magnetic conduction blocks matching the electromagnetic generators; each electromagnetic generator includes a housing and a wire. An electromagnetic coil is arranged in the housing. The wire passes through the housing and is connected to the electromagnetic coil. One end of the housing is provided with a forming insert matching the magnetic conduction block; the magnetic conduction block is used to attract and position the forming insert, avoiding drilling and tapping on the forming insert and the mold surface, canceling the bolt connection, directly and quickly placing and positioning the forming insert, and only cutting off the electromagnetic power supply during demolding and disassembly. The more holes and grooves in the composite material structure, the more beneficial it is to use this device, so as to achieve the purpose of improving the mold vacuum degree, rapid installation and improving efficiency;

[0014] In the technical solution of the present utility model, the housing is of a hollow structure. A coil fixing rod is arranged in the middle of the housing. Symmetrically arranged guiding and positioning strips are arranged on both sides of the coil fixing rod to guide the electromagnetic coil to be fixedly wound around the coil fixing rod. One end of the coil fixing rod is provided with a silica gel protective layer, which can better protect the electromagnetic generator, enable the electromagnetic generator and the magnetic conduction block to form an effective magnetic path, ensure the magnetic adsorption effect with the subsequent forming insert, solve the problems of inconvenient disassembly and assembly of the forming insert with holes and grooves and difficult demolding, and significantly improve the production efficiency and product quality;

[0015] In the structure of the present utility model, the composite material forming die is provided with 2 - 5 slot holes matching the shape of the shell. Magnetic conduction blocks are arranged in the slot holes, and positioning bumps are provided on the magnetic conduction blocks. The bottom of the shell is provided with positioning grooves matching the positioning bumps. The forming inserts of the present utility model can be disassembled and assembled repeatedly for multiple times, which can effectively improve the quality of products, improve the stability of the vacuum degree and the production efficiency during the vacuum infusion molding of the composite material structure with hole slots;

[0016] The structure of the present utility model is simple, rationally arranged and convenient to use. The electromagnetic positioning device assembled by using the electromagnetic generation principle effectively avoids air leakage of the forming die, which is convenient for popularization and use. Brief Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model.

[0018] Figure 2 It is a schematic structural diagram of the electromagnetic generator of the present utility model.

[0019] Figure 3 It is a reference schematic diagram of the usage state of the present utility model.

[0020] Figure 4 It is another reference schematic diagram of the usage state of the present utility model.

[0021] Reference Signs:

[0022] 1 wire, 2 electromagnetic coil, 3 shell, 4 silicone protective layer, 5 forming insert, 6 composite material forming die, 7 electromagnetic generator;

[0023] 31 coil fixing rod, 32 guiding positioning strip. Detailed Embodiments

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] The present utility model provides an electromagnetic positioning device for the vacuum infusion molding of a composite material structure, mainly including a composite material forming die 6. Specifically, refer to Figure 1 , and the difference from the prior art is that: the composite material forming die 6 is provided with a plurality of detachable electromagnetic generators 7, and a magnetic conduction block matching the electromagnetic generator is embedded in the composite material forming die 6. Here, the magnetic conduction block can be pre - embedded inside the composite material forming die, corresponding one by one to the electromagnetic generators to be loaded subsequently, so that the electromagnetic generator and the magnetic conduction block form a magnetic circuit.

[0026] Specifically, each electromagnetic generator 7 includes a housing 3 and a wire 1. An electromagnetic coil 2 is provided inside the housing. The wire 1 passes through the housing 3 and is connected to the electromagnetic coil 2. One end of the housing 3 is provided with a forming insert 5 that cooperates with a magnetic conduction block. Here, the forming insert 5 and the housing 3 have a conveniently detachable cooperation relationship; the housing 3 is a hollow structure. A coil fixing rod 31 is provided in the middle of the housing. Symmetrically arranged guiding and positioning strips 32 are provided on both sides of the coil fixing rod 31 for guiding the electromagnetic coil 2 to be fixedly wound around the coil fixing rod 31. One end of the coil fixing rod 31 is provided with a silica gel protective layer 4.

[0027] During use, the present utility model does not use any traditional fixing parts or connecting parts (such as screws, bolts, etc.) to achieve an effective connection between the electromagnetic generator 7 and the forming insert 5. Instead, the forming insert is tightly adsorbed on the surface of the composite material forming mold 6 by the effective magnetic force after power-on, so as to achieve the purpose that no fasteners are required for the installation and demolding of the forming insert 5. At the same time, there are no bolt holes on the mold surface, so no air leakage will occur during vacuum pumping; during demolding, the power is cut off, and the forming insert 6 automatically falls off, thereby achieving the purposes of improving the mold vacuum degree, rapid production, and improving the forming quality. Embodiment 1

[0028] The electromagnetic positioning device described in this embodiment mainly includes a composite material forming mold 6. A plurality of detachable electromagnetic generators 7 are provided on the composite material forming mold 6. A magnetic conduction block that cooperates with the electromagnetic generator 7 is embedded in the composite material forming mold 6, so that an effective magnetic circuit can be formed between the electromagnetic generator 7 and the magnetic conduction block after power-on; at the same time, each electromagnetic generator 7 includes a housing 3 and a wire 1. An electromagnetic coil 2 is provided inside the housing. The wire 1 passes through the housing 3 and is connected to the electromagnetic coil 2. One end of the housing 3 is provided with a forming insert 5 that cooperates with the magnetic conduction block, so that the forming insert 5 is arranged on the magnetic path after conduction, and the forming insert 5 can be tightly adsorbed on the surface of the composite material forming mold by magnetic lines of force.

[0029] Specifically, the housing 3 is a hollow structure. A coil fixing rod 31 is provided in the middle of the housing 3. Symmetrically arranged guiding and positioning strips 32 are provided on both sides of the coil fixing rod 31. The surface of the guiding and positioning strips 32 is arc-shaped for guiding the electromagnetic coil 2 to be fixedly wound around the coil fixing rod 32 and relatively fixed. Adjacent coils do not touch or wind around each other. One end of the coil fixing rod is provided with a silica gel protective layer. The silica gel protective layer 4 is used to protect the electromagnetic coil. One end of the coil fixing rod 31 is fixedly connected to the bottom of the housing, and the other end is a silica gel protective layer fixing end. The silica gel protective layer fixing end is conical. The coil fixing rod passes through the silica gel protective layer, and the exposed part is 2 - 5 cm, which can ensure the relative fixation of the silica gel protective layer.

[0030] Further, the silica gel protective layer 4 cooperates with the housing 3 to enclose the electromagnetic coil 2 within the housing 3. The composite material forming die 6 is provided with 2 - 5 slot holes that match the shape of the housing. The slot holes are provided with magnetic conduction blocks, and the magnetic conduction blocks are provided with positioning bumps. The bottom of the housing is provided with positioning grooves that match the positioning bumps. One end of the coil fixing rod passes through the silica gel protective layer, and a fixing end with a height of 2 - 5 mm is exposed for fixing the forming insert. One side of the forming insert 5 is provided with a positioning slot hole that matches the coil fixing rod. 2 - 5 wires 1 are combined into a wire group, and the wire group is connected to a power source through a switch. The power source is equipped with a leakage protection device.

[0031] During use, several groups of energized wires are connected in parallel to the switch according to the number of hole slots, and several magnetic conduction blocks are embedded into the composite material forming die 6 at specified positions. After the switch is turned on to connect the power source, the electromagnetic generator generates a magnetic field, and the electromagnetic generator 7 and the magnetic conduction blocks form a magnetic circuit; the forming insert 5 is directly placed at the corresponding position of the embedded magnetic conduction block, and the forming insert 5 is tightly adsorbed on the die surface by electromagnetic force. In this way, there are no bolt holes on the die surface, and no air leakage will occur during vacuum pumping. Moreover, the forming insert can be directly placed in place without being fastened by bolts; during demolding, the power is cut off, and the forming insert 5 automatically falls off, thereby achieving the purpose of improving the vacuum degree, rapid production, and improving the forming quality. Embodiment 2

[0032] The electromagnetic positioning device in this embodiment mainly includes a composite material forming die 6. The composite material forming die 6 is provided with several detachable electromagnetic generators 7. The composite material forming die is embedded with magnetic conduction blocks that cooperate with the electromagnetic generators 7, so that the electromagnetic generators 7 and the magnetic conduction blocks can form an effective magnetic circuit after being energized; at the same time, each electromagnetic generator 7 includes a housing 3 and a wire 1. An electromagnetic coil 2 is arranged within the housing 3, and the wire 1 passes through the housing 1 and is connected to the electromagnetic coil 2. One end of the housing is provided with a forming insert 5 that cooperates with the magnetic conduction block, so that the forming insert 5 is arranged on the magnetic path after conduction, and the forming insert 5 can be tightly adsorbed on the surface of the composite material forming die by magnetic lines of force.

[0033] The housing 3 is a hollow structure, and the electromagnetic coil 2 is installed into the housing 3. The space between it and the housing 3 is filled with silica gel for protection. One end of the switch is connected to the wire, and the other end is connected to a power source with a leakage protection function. Generally, one switch controls 5 or fewer electromagnetic generators 7 to avoid excessive electrical load. The electromagnetic force generated by the coil in the electromagnetic generator is calculated to be sufficient to ensure the reliable connection of the forming insert.

[0034] In implementation, an electromagnetic positioning device is installed at each hole and groove part of the composite material forming die, and the magnetic conductive block is previously buried in the die at the hole and groove part (not protruding from the die surface so that the forming insert can closely adhere to the die surface). Then the wires are connected to the switches. Generally, each switch controls no more than 5 electromagnetic positioning devices, and then each switch is connected to a power supply box with protection functions. By controlling the switches, the power supply is turned on and off, thereby affecting the generation of the electromagnetic field. The advantage of the present invention lies in using the electromagnetic positioning device to tightly connect the forming insert, avoiding drilling and tapping on the forming insert and the die surface, canceling the bolt connection, directly and quickly placing and positioning the forming insert. When demolding and disassembling, as long as the electromagnetic power supply is cut off. The more hole and groove structures there are in the composite material structure, the more beneficial the structure of this device is, so as to achieve the purpose of improving the vacuum degree of the die, rapid installation, and improving efficiency.

[0035] The above content is a further detailed description of the present utility model in combination with specific preferred implementation manners, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or replacements can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. An electromagnetic positioning device for vacuum infusion molding of composite structures, mainly comprising a composite molding die, characterized in that: The composite material forming die (6) is provided with a plurality of detachable electromagnetic generators (7), and a magnetic conduction block matched with the electromagnetic generator (7) is embedded in the composite material forming die, so that a magnetic circuit is formed between the electromagnetic generator (7) and the magnetic conduction block; Each electromagnetic generator (7) includes a housing (3) and a wire (1). An electromagnetic coil (2) is arranged in the housing (3). The wire (1) passes through the housing (3) and is connected to the electromagnetic coil (2). A forming insert (5) matched with the magnetic conduction block is arranged at one end of the housing (3); The housing (3) is of a hollow structure. A coil fixing rod (31) is arranged in the middle of the housing. Guide positioning strips (32) are symmetrically arranged on both sides of the coil fixing rod (31) for guiding the electromagnetic coil to be fixedly wound around the coil fixing rod (31). A silica gel protective layer (4) is arranged at one end of the coil fixing rod (31).

2. The electromagnetic positioning device for vacuum infusion molding of composite material structures according to claim 1, wherein: One end of the coil fixing rod (31) is fixedly connected to the bottom of the housing, and the other end is a silica gel protective layer fixing end, and the silica gel protective layer fixing end is conical.

3. The electromagnetic positioning device for vacuum infusion molding of composite material structures according to claim 1, characterized in that: The silica gel protective layer (4) cooperates with the housing (3) to seal the electromagnetic coil (2) in the housing (3).

4. An electromagnetic positioning device for vacuum infusion molding of composite material structures according to claim 1, characterized in that: The composite material forming die (6) is provided with 2-5 slot holes matched with the shape of the housing. The bottom of the slot holes is provided with magnetic conduction blocks. The magnetic conduction blocks are provided with positioning bumps, and the bottom of the housing is provided with positioning grooves matched with the positioning bumps.

5. The electromagnetic positioning device for vacuum infusion molding of composite material structures according to claim 2, wherein: One end of the coil fixing rod (31) passes through the silica gel protective layer (4), and 2-5 mm of the silica gel protective layer fixing end is exposed for fixing the forming insert (5). A positioning slot hole matched with the coil fixing rod is arranged on one side of the forming insert (5).

6. The electromagnetic positioning device for vacuum infusion molding of composite material structures according to claim 1, characterized in that: 2-5 wires (1) are combined into a wire group. The wire group is connected to a power supply through a switch, and the power supply is provided with a leakage protection device.

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