A device and method for positioning a reinforcing patch for a bonded-resin matrix composite test specimen

Abstract

The application belongs to the technical field of auxiliary tooling and relates to a device for positioning and bonding a resin matrix composite sample reinforcing sheet, comprising a supporting platform, a reinforcing sheet positioning clamp block, a sample positioning clamp block, a length synchronization pin shaft, a width synchronization pin shaft and a pressurizing and temperature control unit, wherein the pressurizing and temperature control unit comprises a connected screw pressurizing table, a heating and temperature control base and an adjustable supporting base; two length synchronization pin shafts are symmetrically arranged on both sides of the pressurizing and temperature control unit along the length direction; the clamp blocks on the same side are connected by the length synchronization pin shaft along the length direction of the clamped sample; the length synchronization pin shaft is slidably connected to one side of the supporting platform; two long hole sliding grooves are prefabricated on the supporting platform, and the pressurizing and temperature control unit is slidably connected in the long hole sliding grooves; the clamp blocks oppositely arranged are connected by the width synchronization pin shaft along the width direction of the clamped sample. The device solves the problem that the existing clamp cannot meet the positioning of test pieces of various specifications and has poor adjustability.

Description

Technical Field

[0001] This invention belongs to the field of auxiliary tooling technology, specifically relating to a device and method for positioning and bonding resin-based composite sample reinforcing sheets. Background Technology

[0002] For many materials, especially various sheet materials (polymer materials, fiber-reinforced composite prepregs, etc.), characterization experiments or mechanical property tests are essential for subsequent testing. However, when loading samples, due to the low surface hardness and high flexibility of these materials, reinforcing sheets need to be attached to the loading areas at the ends of the specimen for local reinforcement. Commonly used adhesives, such as two-component adhesives like AB glue, require a period of local pressure holding and heating during the bonding process to help the adhesive layer on the specimen cure more quickly and effectively.

[0003] In practice, when bonding specimens, the actual loading requirements of the specimens must be considered. Accurate and rapid positioning of the relative positions of specimens of different specifications and reinforcing sheets is crucial while continuous pressure and heating are applied. Existing positioning devices are mostly unable to meet the positioning needs of specimens of various specifications. Furthermore, the operation is complex and prone to repositioning issues, the positioning datum is often vague, and the bonding effect of the reinforcing sheets depends heavily on the operator's experience and skill. Moreover, during pressure curing of the adhesive surface, excess adhesive inevitably overflows from the surrounding gaps. Existing positioning devices, after completing the positioning operation, still maintain contact between the positioning surface and the perimeter of the adhesive surface, making it easy for reinforcing sheets of the same width as the specimen to adhere to the positioning device.

[0004] Currently, there are no specific positioning-heating and pressurizing devices for reinforcing and positioning composite and film materials. Summary of the Invention

[0005] The purpose of this invention is to provide a device and method for positioning and bonding resin-based composite sample reinforcing sheets, which solves the problem that existing fixtures cannot meet the positioning requirements of test pieces of various specifications and have poor adjustability.

[0006] This invention is achieved through the following technical solution:

[0007] A device for positioning and bonding resin-based composite sample reinforcing sheet includes a support platform, a reinforcing sheet positioning clamp, a sample positioning clamp, a length synchronous pin, a width synchronous pin, and two pressure and temperature control units. The pressure and temperature control unit includes a connected spiral pressure table, a heating and temperature control base, and an adjustable support base.

[0008] The reinforcing plate positioning clamp and the specimen positioning clamp are set on the support platform, and two length synchronization pins are provided along the length direction and are symmetrically arranged on both sides of the pressure and temperature control unit.

[0009] Along the length of the specimen, the reinforcing plate positioning clamps are symmetrically arranged on both sides of the specimen positioning clamp, and the reinforcing plate positioning clamps and the specimen positioning clamps on the same side are connected in series by a length synchronization pin; the length synchronization pin is slidably connected to one side of the support platform.

[0010] Two elongated slots are prefabricated on the support platform, and the pressure control unit is slidably connected in the elongated slots;

[0011] In the width direction of the specimen clamping, the oppositely arranged reinforcing plate positioning clamping blocks are connected in series by width synchronization pins, and the oppositely arranged specimen positioning clamping blocks are connected in series by width synchronization pins.

[0012] The adjustable support base is located below the support platform, while the spiral pressure table and the heating and temperature control base are located above the support platform.

[0013] Furthermore, a dovetail groove is prefabricated on one side of the support platform, and a connecting piece is slidably connected in the dovetail groove. A semi-circular groove is prefabricated on the outer side of the connecting piece; the end of the length synchronization pin is fixedly connected in the semi-circular groove.

[0014] Furthermore, the spiral pressure table includes a spiral rod, a wedge-shaped pressure block, and a piezoelectric force sensor connected in sequence;

[0015] The piezoelectric force sensor is fixed above the wedge-shaped pressure block, and the lower end of the screw rod is movably connected to the piezoelectric force sensor.

[0016] Furthermore, the heating and temperature control base includes an upper connecting plate, a support plate, and a lower heating plate. The upper connecting plate and the lower heating plate are arranged in parallel and are both vertically connected to the support plate.

[0017] The support plate is connected to the outside of the upper connecting plate and the lower heating plate. A connecting hole is opened on the upper connecting plate, and the spiral rod passes through the connecting hole and is threadedly connected to the connecting hole.

[0018] Furthermore, the lower heating plate is equipped with a heating coil with an insulating coating, and the heating coil is connected to an external current heating control box.

[0019] Furthermore, the adjustable support base has a built-in spring and telescopic rod, and the telescopic rod has locking screw holes in the direction of the annular wall;

[0020] A flat surface is pre-made on the telescopic pole, and height adjustment scale lines and length distance reference lines are pre-made on the flat surface.

[0021] Furthermore, a length adjustment scale line is pre-made next to the elongated groove, and the length adjustment scale line is vertically aligned with the length distance reference line.

[0022] Furthermore, the number of specimen positioning clamps set on the same side along the length of the specimen is adjusted according to the specimen length.

[0023] Furthermore, the reinforcing plate positioning clamps are pre-drilled with a first round hole for passing through the length synchronous pin and a second round hole for passing through the width synchronous pin. The inner surfaces of the two reinforcing plate positioning clamps are positioned opposite each other as positioning surfaces. Dovetail grooves are pre-drilled on the positioning surfaces, and positioning plates are installed in the dovetail grooves. Springs are connected to the positioning plates near the reinforcing plate positioning clamps.

[0024] This invention discloses a positioning method based on the aforementioned device, comprising the following steps:

[0025] S1. Move the adjustable support base downwards according to the thickness of the reinforcing sheet, and adjust the position of the adjustable support base at both ends according to the total length of the specimen.

[0026] The reinforcing plate positioning clamping block slides along the length synchronization pin shaft and moves to a position where it can clamp the reinforcing plate, thus satisfying the clamping and positioning of the reinforcing plate and completing the positioning in the length direction.

[0027] S2. Place the reinforcing sheet coated with adhesive upwards on the heating and temperature control base, place the test piece on top of the reinforcing sheet, and then place the reinforcing sheet coated with adhesive downwards on the test piece.

[0028] S3. Slide the length synchronization pin towards the middle along the width direction until the specimen positioning clamp contacts and positions the specimen 9 on both sides, thus completing the positioning in the width direction.

[0029] S4. Start the spiral pressurizing table to apply pressure;

[0030] S5. Set the temperature of the heating and temperature control base. The heating and temperature control base will start heating until it stabilizes at the set curing temperature. After the required curing time of the adhesive is reached, stop heating and pressurizing to complete the bonding of the reinforcing sheet.

[0031] Compared with the prior art, the present invention has the following beneficial technical effects:

[0032] This invention discloses a device for positioning and bonding reinforcing sheets of resin-based composite samples, comprising a support platform, reinforcing sheet positioning clamps, specimen positioning clamps, length synchronization pins, width synchronization pins, a spiral pressure table, a heating and temperature control base, and an adjustable support base. The clamps are connected in series along their length and width directions by the length synchronization pins, ensuring accurate relative positioning. Compared to existing reinforcing sheet positioning and auxiliary bonding devices, this device can adapt to a wider range of specimen sizes. The pressure and temperature control unit is slidably connected in the elongated groove of the support platform, adjusting its position according to the specimen length, and simultaneously providing heating and temperature control and accurate pressure application, ensuring the stability of the bonded surface quality. After positioning, the adjustable support base supports the reinforcing sheet and specimen. At this point, the reinforcing sheet and specimen positioning clamps are no longer needed; the clamps on both sides can be moved apart by the length synchronization pins, preventing adhesive overflow from flowing onto the positioning blocks during pressure application. Each functional module of this device is highly independent, easy to disassemble and assemble, and facilitates the matching and replacement of accessories for test pieces of larger specifications and sizes. Specific components can be disassembled and their models changed to meet specific needs without affecting the operation of other components, thus exhibiting good expandability.

[0033] Furthermore, a dovetail groove is designed on one side of the support platform, and a connecting piece is slidably connected in the dovetail groove. The dovetail groove and the connecting piece cooperate to position and restrict the rotation and some movement freedom of the length synchronization pin, while retaining the sliding freedom parallel to the dovetail groove. At the same time, the design of the dovetail groove can prevent the connecting piece from coming out of the dovetail groove when sliding.

[0034] Furthermore, when the handle of the spiral pressure table is rotated, the height of the pressure surface can be adjusted by the thread, and the sensor below and the pressure surface do not rotate with the rotation of the handle; the pressure table is designed with a trapezoidal draft shape to ensure stable and uniform pressure, while contacting the side wall of the temperature control base to restrict the degree of rotation.

[0035] Furthermore, a length reference line is pre-drilled on the plane of the telescopic rod, and a length adjustment scale line is pre-drilled next to the elongated groove. When the adjustable support base slides in the length direction, the length reference line always aligns with the length adjustment scale line, making it easy to know the distance in the length direction. This allows for precise adjustment of the distance between the two pressure and temperature control units according to specimens of different lengths.

[0036] Furthermore, due to processing precision requirements, it is necessary to consider that the width of the reinforcing sheet is slightly larger than the width of the specimen, ensuring the relative position of the specimen and the wider reinforcing sheet during bonding. Therefore, a sliding positioning piece is designed on the positioning surface of the reinforcing sheet positioning clamp. The positioning piece adopts an elastic clamping design to accommodate the positioning of the reinforcing sheet, which is wider than the specimen. Attached Figure Description

[0037] Figure 1This is an assembly diagram of the present invention;

[0038] Figure 2 This is a schematic diagram of the supporting platform structure;

[0039] Figure 3 This is a scale diagram of the elongated groove;

[0040] Figure 4 A schematic diagram of the structure supporting the side of the platform;

[0041] Figure 5 A schematic diagram showing the connection between the support platform and the length synchronization pin.

[0042] Figure 6 A schematic diagram of the structure of the reinforcement plate positioning clamp;

[0043] Figure 7 for Figure 6 A sectional view;

[0044] Figure 8 This is a schematic diagram of the pressure-controlled temperature unit.

[0045] Figure 9 A schematic diagram showing the assembly of the reinforcing sheet and the specimen after the reinforcing sheet and the specimen are positioned by the reinforcing sheet positioning clamp and the specimen positioning clamp;

[0046] Figure 10 This is a diagram of a standard test specimen.

[0047] The components include: 1. Support platform; 2. Reinforcing plate positioning clamp; 3. Specimen positioning clamp; 4. Length synchronization pin; 5. Width synchronization pin; 6. Spiral pressure table; 7. Heating and temperature control base; 8. Adjustable support base; 9. Specimen; 10. Reinforcing plate.

[0048] 11. Dovetail groove; 12. Connecting piece; 13. Long hole slide groove;

[0049] 21. First circular hole; 22. Second circular hole; 23. Positioning piece; 24. Spring;

[0050] 61. Helical rod; 62. Wedge-shaped pressure block; 63. Piezoelectric force sensor;

[0051] 71. Upper connecting plate; 72. Support plate; 73. Lower heating plate;

[0052] 81. Telescopic pole. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the present invention clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention; that is, the described embodiments are only a part of the embodiments of the present invention, and not all of them.

[0054] The components described and shown in the accompanying drawings and embodiments of this invention can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the invention provided in the following drawings is not intended to limit the scope of the claimed invention, but merely to illustrate one selected embodiment of the invention. All other embodiments obtained by those skilled in the art based on the accompanying drawings and embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0055] It should be noted that the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, element, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to the process, element, method, article, or apparatus. Furthermore, the terms "horizontal" and "vertical" are based on the orientation and positional relationship of the devices or components shown in the accompanying drawings and are used only for better description of the invention, not to require that the shown devices, components, or apparatus must have that specific orientation, and therefore should not be construed as limiting the invention.

[0056] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0057] like Figure 1 As shown, the device includes: a support platform 1, a reinforcing plate positioning clamp 2, a specimen positioning clamp 3, a length synchronous pin 4, a width synchronous pin 5, and a pressure and temperature control unit. The pressure and temperature control unit includes a spiral pressure table 6, a heating and temperature control base 7, and an adjustable support base 8. The spiral pressure table 6, the heating and temperature control base 7, and the adjustable support base 8 are connected together.

[0058] like Figure 1 As shown, both the reinforcing plate positioning clamp 2 and the specimen positioning clamp 3 consist of two pairs of symmetrical parts, and all clamps have synchronous positioning holes. The reinforcing plate positioning clamp 2 and the specimen positioning clamp 3 are placed on the support platform 1. The length direction of the clamps is synchronized by a length synchronization pin 4, and the width direction is synchronized by a width synchronization pin 5, ensuring the accuracy of their relative positions. The length synchronization pin 4 is connected to one side of the support platform 1 and can be slidably adjusted.

[0059] Specifically, such as Figure 4 and Figure 5As shown, a dovetail groove 11 is prefabricated on one side of the support platform 1, and a connecting piece 12 is installed in the dovetail groove 11. A semi-circular groove is prefabricated on the outer side of the connecting piece 12. The length synchronization pin 4 includes a straight rod section and a bent section. The straight rod section is used to connect the reinforcing plate positioning clamp 2 and the specimen positioning clamp 3 in series. The end of the bent section is fixedly connected in the semi-circular groove. When it is necessary to move the length synchronization pin 4 to both sides in the width direction, the connecting piece 12 slides in the dovetail groove 11, driving the length synchronization pin 4 to move synchronously.

[0060] The dovetail groove and the connecting piece work together to position and restrict the rotation and some movement freedom of the length synchronization pin 4, while retaining the sliding freedom parallel to the dovetail groove; at the same time, the design of the dovetail groove can prevent the connecting piece from coming out of the dovetail groove when sliding.

[0061] like Figure 2 and Figure 3 As shown, the support platform 1 has two elongated slots 13 symmetrically distributed in the middle. The adjustable support base 8 extends into the elongated slots 13. The elongated slots 13 are pre-made with length adjustment scale lines, which are used to adjust the distance between the two pressure and temperature control units according to different specimen lengths.

[0062] like Figure 8 As shown, the spiral pressurizing table 6 consists of three parts: a spiral rod 61, a piezoelectric force sensor 63, and a wedge-shaped pressurizing block 62. The piezoelectric force sensor 63 is fixed above the wedge-shaped pressurizing block 62, and the spiral rod 61 is movably connected to the piezoelectric force sensor below. This ensures that the relative rotation between the wedge-shaped pressurizing block 62 and the spiral rod 61 is not affected while the pressure is applied. The piezoelectric force sensor 63 is connected to an external display to show the pressure reading and monitors the real-time changes in pressure during the pressurization process in order to control the pressure.

[0063] The pressure table adopts a wedge-shaped design to ensure uniform pressure. The pressure surface of the wedge-shaped pressure block 62 is consistent with the heating surface of the heating and temperature control base 7, ensuring that the end of the wedge-shaped pressure block 62 contacts the side wall of the heating and temperature control base 7, while restricting its rotational freedom to ensure stable pressure.

[0064] like Figure 8 As shown, the heating and temperature control base 7 includes an upper connecting plate 71, a support plate 72, and a lower heating plate 73. The upper connecting plate 71 and the lower heating plate 73 are arranged in parallel and are both vertically connected to the support plate 72. The support plate 72 is connected to the outside of the upper connecting plate 71 and the lower heating plate 73. A connection hole is opened on the upper connecting plate 71, and the spiral rod 61 is threadedly connected to the connection hole. Two connectors are led out from the outside of the heating and temperature control base 7 to connect to an external heating temperature controller for displaying the temperature.

[0065] like Figure 8 As shown, the adjustable support base 8 has a built-in spring and telescopic rod 81, and the spring... Figure 8Not shown, there are locking screw holes in the ring wall direction for supporting and adjusting the height of the heating and temperature control base 7; the spring, due to its supporting force, provides elastic support when adjusting the height by pressing down, facilitating adjustment. Additionally, a flat surface is pre-fabricated on the telescopic rod 81, with a height adjustment scale line A and a length distance reference line B pre-fabricated on the flat surface. The length distance reference line B is a vertical reference line parallel to the rod axis, used to align with the length adjustment reference line on the elongated slot 13 for length positioning.

[0066] The positioning of both ends of the specimen 9 is limited in length by the support plate 72 of the heating and temperature control base 7. Each heating and temperature control base 7 has two planes on both sides of the telescopic rod 81 below it that cooperate with the elongated slot 13 of the support platform 1 to control the two rotational degrees of freedom and one translational degree of freedom of the base. The plane has long engravings that, together with the engravings of the elongated slot 13, assist in the limiting of the heating and temperature control base 7. There are height markings to assist in the height positioning of the heating and temperature control base 7. The height is supported and adjusted by the adjustable support base 8 with built-in springs. After adjustment, it is locked with screw holes around the perimeter to control the last rotational degree of freedom of the heating and temperature control base 7.

[0067] The heating and temperature control base 7 contains a heating coil with an insulating coating for heating operation and to prevent leakage. It is connected to a small current heating control box for heating, curing and temperature control of epoxy resin or resin film (the common curing temperature is around 100℃). After setting the heating temperature, it can heat and keep warm continuously.

[0068] like Figure 9 As shown, the reinforcing plate positioning clamp 2 and the specimen positioning clamp 3 are used to ensure relative positioning in the width and length directions. The reinforcing plate positioning clamp 2 positions the reinforcing plate 10, and the specimen positioning clamp 3 supports and positions the gauge length section of the specimen 9. The thick black area in the figure represents the specimen 9, and the dashed box represents the reinforcing plate 10. When the clamped specimen 9 has high flexibility, the specimen positioning clamp 3 provides support for the lower surface of the specimen 9 to prevent excessive deflection deformation.

[0069] The clamping end of specimen 9 is pressurized and pressure controlled by the spiral pressure tables 6 at both ends, while the heating and temperature control base 7 is responsible for support and heating and temperature control. The adjustable support bases 8 at both ends are used to adjust and fix the height of the heating and temperature control base 7.

[0070] When positioning and bonding the reinforcing sheet 10 to specimen 9, first adjust the spiral pressure tables 6 at both ends to the length of specimen 9 according to the scale line of the elongated groove 13 in the middle of the support platform 1. Place the reinforcing sheet 10 against the heating and temperature control bases 7 at both ends, and place specimen 9 on the specimen positioning clamps 3. Make fine adjustments to the height of the adjustable support bases 8 at both ends. If necessary, select positioning clamps and positioning sheets of appropriate specifications according to the thickness range of the specimen. Adjust the above shape and position parameters to ensure that the reinforcing sheet 10 and the two ends of specimen 9 are in contact under natural conditions. At the same time, control the length synchronization pin 4 to tighten the positioning clamps 2 of the reinforcing sheet on both sides towards the middle to ensure that the clamps on both sides are in contact with and positioned on the reinforcing sheet 10. After the adjustment is completed, the corresponding model of reinforcing sheet 10 can be bonded and fixed.

[0071] like Figure 6 and Figure 7 As shown, the reinforcing plate positioning clamp 2 has a first round hole 21 for passing through the length synchronous pin 4 and a second round hole 22 for passing through the width synchronous pin 5. The inner surfaces of the two reinforcing plate positioning clamps 2 are positioned opposite each other as positioning surfaces. Dovetail grooves are pre-made on the positioning surfaces, and positioning plates 23 are installed in the dovetail grooves.

[0072] To accommodate the positioning of the reinforcing piece 10, which is wider than the test piece 9, the positioning surfaces on both sides of the reinforcing piece positioning clamp 2 are separated from the corresponding clamps. Positioning is achieved through the positioning piece 23 connected by a dovetail groove, such as... Figure 7 As shown, a dovetail groove is pre-made on the positioning surface of the reinforcing plate positioning clamp 2, and a positioning piece 23 is provided in the dovetail groove. A spring 24 is connected to the inner side of the positioning piece 23 to achieve elastic positioning. After being pressed, the positioning piece 23 can slide along a direction parallel to the width synchronous pin 5.

[0073] The positioning plate 23 is replaceable to accommodate the positioning requirements of specimens 9 of different models and thicknesses. The positioning clamps on both sides are connected by two width-synchronous pins 5 perpendicular to the positioning surface, ensuring that the clamping width adjustment direction is perpendicular to the positioning surface.

[0074] The operation steps are as follows:

[0075] Step 1, follow as follows Figure 8 Adjust the height and length of the displayed scale. Figure 8 The left part shows the assembly diagram of the heating and temperature control base 7, and the right part shows the scale diagram. The bottom scale is the 0 scale line. The reference plane is the upper plane of the adjustable support base 8. After adjusting the height scale according to the thickness specification of the reinforcing plate 10, tighten the screw. The default clamping thickness is set to 1mm, so the downward adjustment height = the thickness of the reinforcing plate 10 - 1mm.

[0076] Slide the adjustable support bases 8 at both ends to align with the length and distance reference line until the reference line is aligned with half the total length of the specimen 9.

[0077] Move the positioning clamps 2 of the two end reinforcing plates to a suitable position to clamp the reinforcing plate 10 to satisfy the clamping and positioning of the reinforcing plate 10 (e.g., align the end of the clamp with the side wall of the heating and temperature control base 7).

[0078] Step 2: Place the reinforcing sheet 10 with the adhesive or adhesive film evenly applied, adhesive side up, on the heating and temperature control base 7 at both ends, and press it against the inner wall of the heating and temperature control base 7. Then place the test piece 9 on top of it. Finally, place the upper reinforcing sheet 10 with the adhesive side down on the topmost layer.

[0079] Step 3: Slide the length synchronization pin 4 towards the center and move it until the specimen positioning clamp 3 contacts and positions the two sides of the specimen 9 to complete the positioning of the reinforcing plate 10 in the width direction. Then move the two length synchronization pins 4 apart to prepare for the next step of pressurization.

[0080] Step 4: Set the pressure by rotating the screw rods 61 at both ends to apply pressure. When the pressure surface contacts the upper reinforcing plate 10, slow down the rotation speed and rotate until the pressure reading meets the pressure requirements.

[0081] Step 5: Set the temperature of the heating and temperature control base 7 at both ends. The heating and temperature control base 7 starts heating until it stabilizes at the specified curing temperature. After the required curing time of the adhesive is reached, stop heating and pressurizing to complete the bonding of the reinforcing sheet 10.

[0082] For accurate description, the operation method is explained in detail below with reference to the embodiments.

[0083] like Figure 10 As shown, referring to standard ASTM D3039, the total length of specimen 9 is 250 mm, the width of specimen 9 is 15 mm, and the clamping area of ​​reinforcing sheet 10 is 55 mm long. Reinforcing sheet 10 is 2 mm thick and 1 mm wider than specimen 9 to prevent processing errors. A certain epoxy resin adhesive is used, and its curing conditions are: temperature 80℃, pressure 0.01 MPa, curing for 2 hours.

[0084] First, adjust the height according to step 1. Since the thickness of the reinforcing plate 10 is 2mm, adjust the heating and temperature control bases 7 at both ends downwards by 1mm relative to the zero height mark, and then lock them. The total length of the specimen 9 is 250mm, so align the length distance reference lines at both ends with the 125mm mark. Align the ends of the clamping blocks with the side walls of the heating and temperature control bases 7.

[0085] Place the lower reinforcing sheet 10, specimen 9, and upper reinforcing sheet 10 sequentially, following step 2, and place them against the inner wall of the heating and temperature control base 7. Slide the length synchronization pin 4 towards the center until the specimen positioning clamp 3 contacts both sides of the specimen 9. At this point, the reinforcing sheet 10 contacts the elastic positioning pieces 23 of the reinforcing sheet positioning clamps 2 on both sides, with the relative positions as follows: Figure 9 As shown.

[0086] Set the pressure and temperature. Based on the required pressure of 0.01 MPa, the calculated pressure is 8.25 N. Rotate the screw rods 61 at both ends to apply pressure until the pressure readings on both sides reach 8.25 N. Set the heating temperature to 80℃. The curing and bonding of the reinforcing sheet 10 will be completed after two hours.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A device for positioning and bonding reinforcing sheets of resin-based composite material samples, characterized in that, It includes a support platform (1), a reinforcing plate positioning clamp (2), a specimen positioning clamp (3), a length synchronous pin (4), a width synchronous pin (5), and two pressure and temperature control units. The pressure and temperature control unit includes a connected spiral pressure table (6), a heating and temperature control base (7), and an adjustable support base (8). The reinforcing plate positioning clamp (2) and the specimen positioning clamp (3) are set on the support platform (1), and two length synchronization pins (4) are provided along the length direction and are symmetrically arranged on both sides of the pressure and temperature control unit; Along the length of the specimen (9), the reinforcing plate positioning clamp (2) is symmetrically arranged on both sides of the specimen positioning clamp (3), and the reinforcing plate positioning clamp (2) and the specimen positioning clamp (3) on the same side are connected in series by a length synchronization pin (4); the length synchronization pin (4) is slidably connected to one side of the support platform (1); Two elongated slots (13) are prefabricated on the support platform (1), and the pressure control unit is slidably connected in the elongated slots (13); In the width direction of the clamping specimen (9), the oppositely arranged reinforcing plate positioning clamping blocks (2) are connected in series by width synchronization pins (5), and the oppositely arranged specimen positioning clamping blocks (3) are connected in series by width synchronization pins (5). An adjustable support base (8) is set below the support platform (1), and a spiral pressure table (6) and a heating and temperature control base (7) are set above the support platform (1).

2. The device for positioning and bonding a resin-based composite sample reinforcing sheet according to claim 1, characterized in that, A dovetail groove (11) is prefabricated on one side of the support platform (1), and a connecting piece (12) is slidably connected in the dovetail groove (11). A semi-circular groove is prefabricated on the outer side of the connecting piece (12); the end of the length synchronization pin (4) is fixedly connected in the semi-circular groove.

3. The device for positioning and bonding a resin-based composite sample reinforcing sheet according to claim 1, characterized in that, The spiral pressure table (6) includes a spiral rod (61), a wedge-shaped pressure block (62), and a piezoelectric force sensor (63) connected in sequence; The piezoelectric force sensor (63) is fixed above the wedge-shaped pressure block (62), and the lower end of the spiral rod (61) is movably connected to the piezoelectric force sensor (63).

4. The device for positioning and bonding a resin-based composite sample reinforcing sheet according to claim 1, characterized in that, The heating and temperature control base (7) includes an upper connecting plate (71), a support plate (72) and a lower heating plate (73). The upper connecting plate (71) and the lower heating plate (73) are arranged in parallel and are both vertically connected to the support plate (72). The support plate (72) is connected to the outside of the upper connecting plate (71) and the lower heating plate (73). A connecting hole is opened on the upper connecting plate (71), and the spiral rod (61) passes through the connecting hole and is threadedly connected to the connecting hole.

5. The device for positioning and bonding a resin-based composite sample reinforcing sheet according to claim 4, characterized in that, The lower heating plate (73) is equipped with a heating coil with an insulating coating, and the heating coil is connected to an external current heating control box.

6. The device for positioning and bonding a resin-based composite sample reinforcing sheet according to claim 1, characterized in that, The adjustable support base (8) has a built-in spring (24) and a telescopic rod (81), and the telescopic rod (81) has a locking screw hole in the direction of the annular wall; A flat surface is pre-made on the telescopic rod (81), and height adjustment scale lines and length distance reference lines are pre-made on the flat surface.

7. The device for positioning and bonding a resin-based composite sample reinforcing sheet according to claim 6, characterized in that, The elongated groove (13) has a pre-made length adjustment scale line, which is vertically aligned with the length distance reference line.

8. The device for positioning and bonding a resin-based composite sample reinforcing sheet according to claim 1, characterized in that, The number of specimen positioning clamps (3) set on the same side along the length of the specimen (9) is adjusted according to the length of the specimen (9).

9. The device for positioning and bonding a resin-based composite sample reinforcing sheet according to claim 1, characterized in that, The reinforcing plate positioning clamp (2) has a first round hole (21) for passing through the length synchronous pin (4) and a second round hole (22) for passing through the width synchronous pin (5). The inner surfaces of the two reinforcing plate positioning clamps (2) are positioned opposite each other as positioning surfaces. Dovetail grooves are pre-made on the positioning surfaces. Positioning plates (23) are installed in the dovetail grooves. A spring (24) is connected to the positioning plate (23) near the reinforcing plate positioning clamp (2).

10. A positioning method based on the device according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Move the adjustable support base (8) downward according to the thickness of the reinforcing sheet (10), and adjust the position of the adjustable support base (8) at both ends according to the total length of the specimen (9). The reinforcing plate positioning clamp (2) slides along the length synchronization pin (4) and moves to a position that can clamp the reinforcing plate (10), satisfying the clamping and positioning of the reinforcing plate (10) and completing the positioning in the length direction; S2. Place the reinforcing sheet (10) coated with adhesive upward on the heating and temperature control base (7), place the test piece (9) above the reinforcing sheet (10), and then place the reinforcing sheet (10) coated with adhesive downward on the test piece (9). S3. Slide the length synchronization pin (4) towards the middle along the width direction until the specimen positioning clamp (3) contacts and positions the specimen (9) on both sides, thus completing the positioning in the width direction. S4. Start the spiral pressurizing table (6) to pressurize; S5. Set the temperature of the heating and temperature control base (7). The heating and temperature control base (7) starts heating until it stabilizes at the set curing temperature. After the required curing time of the adhesive is reached, stop heating and pressurizing to complete the bonding of the reinforcing sheet (10).

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