Fabric laying and positioning device for composite material sample preparation

Abstract

The utility model discloses a composite material sample preparation fabric laying and positioning device which comprises a fixing support, a fixing groove for fixing a mold is formed in the fixing support, and three sets of laser positioning mechanisms emitting positioning laser towards the fixing groove are arranged on the portion, on one side of the fixing groove, of the fixing support. The three sets of laser positioning devices are arranged in a straight line in the length direction of one side of the fixing groove, the laser positioning mechanism located in the middle is fixed to the fixing support, and the laser positioning mechanisms located on the two sides are arranged on the fixing support through moving assemblies. The device has the advantages that aiming by a ruler or naked eyes is not needed any more, errors and risks of off-axis of upper and lower layers of fabrics are reduced, and stability of mechanical properties of fiber reinforced composite materials is guaranteed.

Description

Technical Field

[0001] The utility model relates to a positioning tooling, in particular to a fabric laying and positioning device for composite material sample preparation. Background Technique

[0002] Compared with traditional materials, fiber-reinforced composites have the advantages of high axial strength and modulus, low density, high temperature resistance in non-oxidizing environments, good fatigue resistance, small thermal expansion coefficient, anisotropy, good corrosion resistance, electrical and thermal conductivity, and good electromagnetic shielding performance. They have been widely used in the fields of aerospace, rail transit, automotive and marine, wind power generation, etc. Most composite materials have obvious non-linear mechanical properties. Fiber-reinforced composites are both materials and structures. Their mechanical properties are related to the fiber structure, that is, related to the matrix, and also closely related to the fiber direction. The load direction and the off-axis angle in fiber-reinforced composites have an important impact on the mechanical properties of the material, especially on the tensile properties, bending properties, compressive properties and impact toughness. As the deviation between the off-axis angle and the load direction increases, the mechanical properties gradually decrease. During the process of testing the mechanical properties of composite materials, in order to obtain the best test data, it is particularly important to ensure that each layer can be accurately laid according to the laying requirements during sample preparation and layering. In the traditional layering method, a ruler or visual aiming is mostly used, and the fabric is involved more during the layering process, increasing the error and risk of the off-axis of the upper and lower layers of the fabric. Content of the Utility Model

[0003] The purpose of the utility model is to provide a fabric laying and positioning device for composite material sample preparation, which can effectively solve the problem that the existing fiber-reinforced composite materials are layered by using a ruler or visual aiming, increasing the error and risk of the off-axis of the upper and lower layers of the fabric.

[0004] In order to solve the above technical problems, the utility model is realized through the following technical solutions:

[0005] A fabric laying and positioning device for composite material sample preparation, including a fixed bracket, a fixed groove for a fixed mold is opened on the fixed bracket, and three laser positioning mechanisms for emitting positioning lasers towards the fixed groove are arranged on the fixed bracket on one side of the fixed groove. The three laser positioning devices are arranged in a straight line along the length direction of one side of the fixed groove. Among them, the laser positioning mechanism in the middle is fixed on the fixed bracket, and the laser positioning mechanisms on both sides are arranged on the fixed bracket through moving components.

[0006] In the above fabric laying and positioning device for composite material sample preparation, fixing plates for pressing the mold are respectively arranged at the four corners of the fixed bracket.

[0007] In the above-mentioned fabric laying and positioning device for composite material sample preparation, a clamping top block of the tooling bracket is further provided in the fixed groove. The cross-section of the clamping top block of the tooling bracket is in an inverted L shape. The lower part of the clamping top block of the tooling bracket is arranged between the side of the mold and the side of the fixed groove, and the upper part of the clamping top block of the tooling bracket abuts against the top surface of the mold.

[0008] In the above-mentioned fabric laying and positioning device for composite material sample preparation, the moving assembly includes a fixed seat, a guide rod, a lead screw and a moving table. The fixed seat is fixed on the fixed bracket. The guide rod and the lead screw are arranged in parallel. The guide rod is fixed on the fixed seat. The lead screw is rotatably connected to the fixed seat. The moving table is slidably connected to the guide rod and threadedly connected to the lead screw. The laser positioning mechanism is fixed on the moving table.

[0009] In the above-mentioned fabric laying and positioning device for composite material sample preparation, there are two guide rods, which are respectively located on both sides of the lead screw.

[0010] In the above-mentioned fabric laying and positioning device for composite material sample preparation, the end of the lead screw extends out of the fixed seat and is connected with a rotating handle.

[0011] In the above-mentioned fabric laying and positioning device for composite material sample preparation, the laser positioning mechanism includes a base, a support column, a cross-shaped fixing frame and a laser head. The support column is arranged vertically and the bottom is fixed on the base. The cross-shaped fixing frame is slidably arranged on the support column. The laser head is rotatably arranged on the cross-shaped fixing frame in the horizontal plane.

[0012] Compared with the prior art, the advantages of the present utility model are:

[0013] Positioning is carried out through the laser positioning mechanism, solving the problem that when laying layers of fiber-reinforced composite materials by using a straightedge or visual aiming, the error and risk of off-axis of the upper and lower layers of the fabric are increased. The mold can be fixed through the fixed bracket. With the use of three groups of laser positioning mechanisms, the laying layers on the mold can be positioned. Among the three groups of laser positioning mechanisms, one group of laser positioning mechanisms at a fixed position can fix the middle of the laying layer, and the two groups of movable laser positioning mechanisms can position the edges of the laying layer. When laying the next layer, there will be a clear alignment position mark, so there is no need to rely on a straightedge or visual aiming, reducing the error and risk of off-axis of the upper and lower layers of the fabric and ensuring the stability of the mechanical properties of the fiber-reinforced composite material.

[0014] Furthermore, fixing plates for pressing the mold are respectively provided at the four corners of the fixed bracket. Through the fixing plates, the mold can be positioned in the vertical direction, and in cooperation with the fixed bracket to position the four sides of the mold, ensuring that the relative position between the mold and the fixed bracket will not change.

[0015] Furthermore, a clamping top block for the tooling bracket is also provided in the fixing groove. The cross-section of the clamping top block for the tooling bracket is in an inverted L shape. The lower part of the clamping top block for the tooling bracket is arranged between the side of the mold and the side of the fixing groove, and the upper part of the clamping top block for the tooling bracket abuts against the top surface of the mold. The clamping top block for the tooling bracket can make the fixing bracket adapt to various different models of molds, eliminate the gap between the mold and the side wall of the fixing groove, and play a pre-tightening role when installing the mold.

[0016] Furthermore, the moving assembly includes a fixed seat, guide rods, a lead screw and a moving table. The fixed seat is fixed on the fixing bracket. The guide rods and the lead screw are arranged in parallel. The guide rods are fixed on the fixed seat. The lead screw is rotatably connected to the fixed seat. The moving table is slidably connected to the guide rods and threadedly connected to the lead screw. The laser positioning mechanism is fixed on the moving table. The guide rods can ensure the stability of the moving table when it moves and keep the moving table moving in a straight line, while the lead screw can accurately control the moving distance of the moving table.

[0017] Furthermore, there are two guide rods, which are respectively located on both sides of the lead screw. The two guide rods respectively located on both sides of the lead screw can prevent the moving table from deflecting and jamming when sliding along the guide rods, and ensure the smooth sliding of the moving table.

[0018] Furthermore, the end of the lead screw extends out of the fixed seat and is connected with a rotating handle. The user can conveniently rotate the lead screw by using the handle to adjust the relative position of the moving table.

[0019] Furthermore, the laser positioning mechanism includes a base, a support column, a cross-shaped fixing frame and a laser head. The support column is vertically arranged and its bottom is fixed on the base. The cross-shaped fixing frame is slidably arranged on the support column. The laser head is rotatably arranged in the horizontal plane on the cross-shaped fixing frame. The support column can adjust the vertical height position of the laser head, and the rotatably arranged laser head can make the laser head aim at the mold to emit laser and make marks. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of a device for positioning the laying of a composite material sample fabric in cooperation with a mold according to the present invention;

[0021] Figure 2 is a schematic structural diagram of a device for positioning the laying of a composite material sample fabric according to the present invention;

[0022] Figure 3 is a schematic structural diagram of the combination of the moving assembly and the laser positioning mechanism in the present invention.

[0023] The reference signs are:

[0024] Fixing bracket 10, fixing groove 11, fixing plate 12, clamping top block 13 of tooling bracket;

[0025] Laser positioning mechanism 20, base 21, support column 22, cross fixing frame 23, laser head 24;

[0026] Mold 30;

[0027] Moving component 40, fixed seat 41, guide rod 42, lead screw 43, moving table 44, rotating handle 45. Specific implementation manner

[0028] A fabric laying and positioning device for composite material sample preparation, comprising a fixing bracket 10, a fixing groove 11 for fixing a mold 30 is formed on the fixing bracket 10, and three laser positioning mechanisms 20 for emitting positioning lasers towards the fixing groove 11 are arranged on the fixing bracket 10 on one side of the fixing groove 11. The three laser positioning devices are arranged in a straight line along the length direction of one side of the fixing groove 11. Among them, the laser positioning mechanism 20 in the middle is fixed on the fixing bracket 10, and the laser positioning mechanisms 20 on both sides are arranged on the fixing bracket 10 through a moving component 40.

[0029] Positioning is carried out through the laser positioning mechanism 20, which solves the problem that when laying layers of fiber-reinforced composite materials by using a ruler or visual aiming method at present, the error and risk of off-axis of the upper and lower layers of the fabric are increased. The mold 30 can be fixed through the fixing bracket 10. By using the three laser positioning mechanisms 20, the laying layers on the mold 30 can be positioned. Among the three laser positioning mechanisms 20, one laser positioning mechanism 20 with a fixed position can fix the middle of the laying layer, and the two movable laser positioning mechanisms 20 can position the edges of the laying layer. When laying the next laying layer, there is a clear alignment position mark, so there is no need to rely on a ruler or visual aiming, reducing the error and risk of off-axis of the upper and lower layers of the fabric, and ensuring the stability of the mechanical properties of the fiber-reinforced composite material.

[0030] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0033] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] Refer to Figures 1 to 3This is an embodiment of a fabric laying and positioning device for composite material sample preparation of the present utility model. A fabric laying and positioning device for composite material sample preparation includes a fixed bracket 10. The fixed bracket 10 has a frame structure. A fixing groove 11 for the fixed mold 30 is formed on the fixed bracket 10. The fixing groove 11 can have a bottom surface or use the tabletop as the bottom surface. Generally, the fixed bracket 10 is in a rectangular frame shape, and the fixing groove 11 is also in a rectangular frame shape, which is more suitable for the rectangular mold 30. On the fixed bracket 10 on one side of the fixing groove 11, there are three groups of laser positioning mechanisms 20 that emit positioning lasers towards the fixing groove 11. That is, the three groups of laser positioning mechanisms 20 are arranged on the fixed bracket 10 on the same side, and the three groups of laser positioning mechanisms 20 are arranged in a straight line along the length direction of this side of the fixed bracket 10. The three groups of laser positioning mechanisms 20 will position the center and both sides of the ply laid on the mold 30. Therefore, the laser positioning device in the middle of the three groups of laser positioning devices is fixed on the fixed bracket 10, and the laser positioning devices on both sides are arranged on the fixed bracket 10 through the moving component 40. Through the laser positioning mechanism 20, the center and both sides of the ply can be accurately positioned, so that there is no need for operators to rely on the naked eye or a ruler for comparison and positioning, and its positioning accuracy is greatly improved, thereby reducing the off-axis error between the upper and lower layers of the fabric and ensuring the stable mechanical properties of the composite material.

[0035] Further, in order to better fix the mold 30 on the fixed bracket 10, fixing plates 12 that press the mold 30 are respectively provided at the four corners of the fixed bracket 10. That is, the fixing plates 12 limit the mold 30 in the vertical direction. In cooperation with the side wall of the fixing groove 11, the relative position of the mold 30 and the fixed bracket 10 is ensured to be fixed. The fixing plates 12 need to extend towards the center of the fixing groove 11 to abut against the mold 30. That is, the projection of the fixing plates 12 on the horizontal plane is partially located within the fixing groove 11. The fixing plates 12 can be fixedly connected to the fixed bracket 10 by bolts or clamping.

[0036] Since the size of the mold 30 is not fixed, in order to make this device adaptable to more different sizes of molds 30, a tooling bracket clamping top block 13 is also provided in the fixing groove 11. Different sizes of tooling bracket clamping top blocks 13 can be selected according to different molds 30. Moreover, after installing the mold 30, inserting the tooling bracket clamping top block 13 between the mold 30 and the side wall of the fixing groove 11 can play a pre-tightening role and fix the relative position of the mold 30 and the fixed bracket 10. The cross-section of the tooling bracket clamping top block 13 is an inverted L shape. The lower part of the tooling bracket clamping top block 13 is inserted between the mold 30 and the side wall of the fixing groove 11, and the upper part of the tooling bracket clamping top block 13 extends towards the center of the fixing groove 11 and abuts against the top surface of the mold 30.

[0037] Based on the above embodiments, the moving component 40 includes a fixed seat 41, a guide rod 42, a lead screw 43 and a moving table 44. A groove is formed on the top surface of the fixed seat 41. Both the guide rod 42 and the lead screw 43 are arranged in the groove. The moving table 44 is slidably connected to the guide rod 42 and threadedly connected to the lead screw 43. That is, through the groove, both ends of the guide rod 42 and the lead screw 43 have fixed positions. The guide rod 42 is fixedly connected to the fixed seat 41, and the lead screw 43 is rotatably connected to the fixed seat 41. In this way, by rotating the lead screw 43, the movement of the moving table 44 along the guide rod 42 can be controlled. Therefore, the axes of the guide rod 42 and the lead screw 43 are arranged in parallel. And the laser positioning mechanism 20 is fixed on the moving table 44.

[0038] In order to ensure that the moving table 44 can slide smoothly along the axis direction of the guide rod 42 when the lead screw 43 rotates, a guide rod 42 is provided on each side of the lead screw 43. In this embodiment, the axial directions of the guide rod 42 and the lead screw 43 are both parallel to the length direction of the side of the fixed bracket 10 where the moving component 40 is located. And the lead screw 43 and the two guide rods 42 are also in the same horizontal plane. In this way, when the lead screw 43 rotates, the moving table 44 can be prevented from jamming with the guide rod 42, and the laser positioning mechanism 20 located on the moving component 40 can be controlled to approach or separate from the centrally fixed laser positioning mechanism 20 along the length direction of the side of the fixed bracket 10.

[0039] Furthermore, in order to facilitate the control of the rotation of the lead screw 43, the end of the lead screw 43 extends out of the fixed seat 41 and is connected with a rotating handle 45. The rotating handle 45 is located at the end of the lead screw 43 away from the fixed laser positioning mechanism 20. This makes the operation more convenient. The operator can easily control the rotation of the lead screw 43 by rotating the rotating handle 45, thereby adjusting the position of the laser positioning mechanism 20.

[0040] The laser positioning mechanism 20 includes a base 21, a support column 22, a cross fixing frame 23 and a laser head 24. The base 21 is used for fixedly connecting with the moving table 44 or the fixed frame. The support column 22 is vertically fixed on the base 21. The cross fixing frame 23 is arranged on the support column 22 with adjustable height in the vertical direction. That is, the height of the cross fixing frame 23 can be adjusted in the vertical direction. The laser head 24 is rotatably connected to the cross fixing frame 23 in the horizontal plane. In this way, it is convenient to adjust the length of the laser beam irradiated on the mold 30.

[0041] During use, place the mold 30 into the fixing groove 11, insert the clamping top block 13 of the tooling bracket for pre-tightening, and then fix the mold 30 by using the fixing plate 12 to prevent relative displacement between the mold 30 and the fixing bracket 10, and keep the horizontal plane of the fixing bracket 10 parallel to the upper surface of the mold 30; turn on the laser positioning device, adjust the laser beam emitted by the laser head 24, and keep the three laser beams parallel. Place the fabric to be laminated flat at the central position of the mold 30, align the 0° fabric line of the fabric with the laser emitted by the middle laser positioning mechanism 20, and fix the position of the fabric with adhesive tape; by adjusting the lead screw 43, align the lasers emitted by the left and right laser positioning mechanisms 20 with the 0° fabric lines on the left and right sides of the fabric; then lay the second layer of fabric on the next layer of fabric, align the fabric lines of the second layer of fabric with all three laser beams, and so on. Keep laying the fabric until the laying is completed. Remove the mold 30 together with the fabric, perform mold closing, vacuum pumping, pressure holding, and resin infusion to complete the preparation of the laminate.

[0042] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the patent scope of the present invention.

Claims

1. A composite material sample fabric laying and positioning device, characterized in that: It includes a fixed bracket, which has a fixed groove for fixing the mold, and the fixed bracket on one side of the fixed groove is provided with three groups of laser positioning mechanisms for emitting positioning lasers toward the fixed groove, and the three groups of laser positioning devices are arranged in a straight line along the length direction of one side of the fixed groove, wherein the laser positioning mechanism located in the middle is fixed on the fixed bracket, and the laser positioning mechanisms located on both sides are arranged on the fixed bracket through movable components.

2. A composite material sample fabric laying and positioning device as claimed in claim 1, characterized in that: The four corners of the fixed bracket are respectively provided with fixing plates for pressing the mold.

3. A composite material sample fabric laying and positioning device as claimed in claim 1, characterized in that: A tooling bracket clamping top block is also provided in the fixing groove, and the cross-section of the tooling bracket clamping top block is an inverted L-shape, the lower part of the tooling bracket clamping top block is provided between the side of the mold and the side of the fixing groove, and the upper part of the tooling bracket clamping top block abuts against the top surface of the mold.

4. A composite material sample fabric laying and positioning device as claimed in claim 1, characterized in that: The moving assembly includes a fixed seat, a guide rod, a screw rod and a moving platform. The fixed seat is fixed on a fixed bracket. The guide rod and the screw rod are arranged in parallel. The guide rod is fixed on the fixed seat. The screw rod is rotatably connected to the fixed seat. The moving platform is slidably connected to the guide rod and threadedly connected to the screw rod. The laser positioning mechanism is fixed on the moving platform.

5. A composite material sample fabric laying and positioning device as claimed in claim 4, characterized in that: There are two guide rods, which are respectively located on both sides of the screw rod.

6. A composite material sample fabric laying and positioning device as claimed in claim 4, characterized in that: The end of the screw rod extends out of the fixing seat and is connected with a rotating handle.

7. A composite material sample fabric laying and positioning device as claimed in claim 1, characterized in that: The laser positioning mechanism includes a base, a support column, a cross fixing frame and a laser head. The support column is vertically arranged and the bottom is fixed on the base. The cross fixing frame is slidably arranged on the support column. The laser head is rotatably arranged on the cross fixing frame in a horizontal plane.

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