Clamp fixture for drilling composite test specimens

Abstract

The utility model relates to test piece clamp frock technical field, especially a kind of jig frock for composite test piece hole making.The jig frock for composite test piece hole making includes base, positioning assembly and clamping assembly. Among them, installation area and processing area are provided on base, installation area is used to be connected with machine tool equipment platform adaptation, and processing area is used to carry composite test piece.Positioning assembly is arranged in processing area, positioning assembly is set to multiple, and multiple positioning assemblies are respectively arranged along the length direction and width direction of base.Clamping assembly is arranged in processing area and is detachably connected with base, clamping assembly is set to multiple, and multiple clamping assemblies are respectively arranged along the length direction and width direction of base;The clamping end of clamping assembly is used to abut composite test piece.The jig frock for composite test piece hole making can be adapted to clamp composite test piece of different sizes, improve processing efficiency, save cost.

Description

Technical Field

[0001] This utility model relates to the field of test piece fixtures and tooling technology, and in particular to a fixture and tooling for making holes in composite material test pieces. Background Technology

[0002] To optimize the structural design of aerospace components and improve their structural safety, mechanical testing is required to determine the maximum load-bearing capacity, load limits, and failure modes of composite material mechanical connections. This testing relies on a large number of standard-compliant composite material open-pore tensile / compression test specimens.

[0003] In existing technologies, due to the diverse sizes and configurations of test pieces, the processing positioning method needs to be frequently adjusted, resulting in a cumbersome processing flow and low processing efficiency. At the same time, existing auxiliary fixtures are difficult to hold the test pieces stably, which can cause hole position deviations and unqualified processing quality, increasing production costs.

[0004] Therefore, there is an urgent need to design a fixture for drilling holes in composite material specimens to solve the above technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a fixture for making holes in composite material specimens, which can be adapted to clamp composite material specimens of different sizes and configurations, thereby improving processing efficiency and quality and saving production costs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a fixture for drilling holes in composite material specimens, including:

[0008] A base is provided with an installation area and a processing area. Along the height direction of the base, the height of the processing area is lower than the height of the installation area. The installation area is used for adaptation and connection with a machine tool platform, and the processing area is used for supporting composite material test pieces.

[0009] A positioning component is disposed in the processing area, and there are multiple positioning components, which are respectively arranged along the length and width directions of the base;

[0010] A clamping assembly is disposed in the processing area and detachably connected to the base. Multiple clamping assemblies are provided, and the multiple clamping assemblies are arranged along the length and width directions of the base, respectively. The clamping end of the clamping assembly is used to abut against the composite material specimen.

[0011] The clamping end of the clamping assembly can apply a preload force along the length direction of the base and a preload force along the height direction of the base to the composite material specimen; and / or, the clamping end of the clamping assembly can apply a preload force along the width direction of the base and a preload force along the height direction of the base to the composite material specimen.

[0012] As an optional technical solution for a fixture for making holes in composite material specimens, the fixture for making holes in composite material specimens further includes a connecting assembly. The connecting assembly includes a first bolt and a connecting block. The mounting area is provided with a mounting hole. The connecting block is provided with a first threaded hole. The connecting block is located below the base and connected to the machine tool platform. One end of the first bolt passes through the mounting hole and is threadedly connected to the first threaded hole.

[0013] As an optional technical solution for a fixture for making holes in composite material specimens, the connecting block has a boss and two slide rails, the two slide rails are located on opposite sides of the boss, the first threaded hole is provided on the boss, and the two slide rails are configured to slide in connection with a groove on the machine tool platform.

[0014] As an optional technical solution for a fixture for making holes in composite material specimens, the positioning component is a positioning pin, the processing area is provided with a positioning hole, and one end of the positioning pin is disposed in the positioning hole.

[0015] As an optional technical solution for a fixture for drilling holes in composite material specimens, the processing area is provided with a second threaded hole, and the clamping assembly includes a clamping member, an adjusting member, and an elastic member. The clamping member and the adjusting member are connected through the elastic member. The adjusting member passes through the clamping member and is threadedly connected to the second threaded hole. The clamping assembly is configured such that by rotating the adjusting member, the clamping end of the clamping member can be driven to approach or move away from the composite material specimen.

[0016] As an optional technical solution for a fixture for making holes in composite material specimens, the adjusting component includes a second bolt and a lifting block, one end of the second bolt passes through the lifting block and is threadedly connected to the second threaded hole; the clamping component includes clamping portions located on opposite sides of the lifting block; the elastic element is provided in two parts, and both clamping portions are connected to the lifting block through the elastic element.

[0017] As an optional technical solution for a fixture for making holes in composite material specimens, the lifting block is provided with a first receiving groove on both sides, and the two clamping parts are provided with a second receiving groove. The first receiving groove and the second receiving groove are provided in a one-to-one correspondence, and the elastic element is accommodated in the first receiving groove and the second receiving groove.

[0018] As an optional technical solution for a fixture for making holes in composite material specimens, the lifting block has an inverted trapezoidal structure, the lifting block has an upper bottom surface and a lower bottom surface, the area of ​​the upper bottom surface is larger than the area of ​​the lower bottom surface, and one end of the second bolt passes through the upper bottom surface and the lower bottom surface in sequence and is threadedly connected to the second threaded hole.

[0019] As an optional technical solution for a fixture for drilling holes in composite material specimens, the clamping part is provided with an elastic buffer layer on the side facing the composite material specimen. The elastic buffer layer is used to avoid damage to the composite material specimen during clamping.

[0020] As an optional technical solution for a fixture for making holes in composite material specimens, multiple second threaded holes are provided, and each second threaded hole corresponds to a clamping assembly. The multiple second threaded holes are arranged along the length and width directions of the base, respectively.

[0021] Furthermore, the distances between the second threaded holes arranged along the length of the base and the composite material specimens are all different, and the distances between the second threaded holes arranged along the width of the base and the composite material specimens are all different, so that the clamping assembly can be adapted to clamp composite material specimens of different sizes.

[0022] The beneficial effects of this utility model include at least the following:

[0023] This utility model provides a fixture for drilling holes in composite material specimens. The fixture includes a base, a positioning component, and a clamping component. The base has an installation area and a processing area. Along the height direction of the base, the height of the processing area is lower than the height of the installation area. The installation area is used for connection and adaptation to a machine tool platform, and the processing area is used to support the composite material specimen. Multiple positioning components are disposed in the processing area, arranged along the length and width directions of the base. Multiple clamping components are disposed in the processing area and detachably connected to the base, arranged along the length and width directions of the base. The clamping end of the clamping component abuts against the composite material specimen. The clamping end of the clamping component can apply a preload force along the length direction and a preload force along the height direction of the base to the composite material specimen; and / or, the clamping end of the clamping component can apply a preload force along the width direction and a preload force along the height direction of the base to the composite material specimen.

[0024] As described above, multiple positioning components are arranged along the length and width directions of the base, enabling multi-directional positioning and fixation of the composite material specimen, ensuring its stability during processing. Specifically, the length side of the composite material specimen abuts against the positioning component in the length direction, and the width side abuts against the positioning component in the width direction, forming a right-angle reference. This restricts the translational freedom of the composite material specimen within the base plane, solving the problem of insufficient positioning accuracy caused by single-direction positioning. Furthermore, the arrangement of the positioning components in the width and length directions can accommodate composite material specimens of different sizes, meeting diverse positioning needs without requiring replacement of the positioning components and improving processing efficiency.

[0025] The clamping assembly can apply preload forces along the length and width directions (lateral clamping force) and a preload force along the height direction (holding force). The height preload prevents the composite material specimen from warping upwards, while the length and width preloads restrict the specimen's displacement within the processing area. These three forces work together to fix the specimen in the processing area, preventing any displacement during hole drilling and significantly improving hole position accuracy and perpendicularity. Furthermore, the clamping assembly is detachably connected to the base, allowing the number and position of the clamping components to be adjusted according to the size of the composite material specimen. This enables the clamping of composite material specimens of different sizes and configurations, improving flexibility and cost-effectiveness. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the fixture for making holes in composite material specimens provided in this embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the connecting component provided in an embodiment of the present utility model;

[0029] Figure 3 This is a schematic diagram of the clamping assembly provided in an embodiment of the present invention;

[0030] Figure 4 This is a top view of the fixture for making holes in composite material specimens provided in this embodiment of the utility model.

[0031] Figure Labels

[0032] 100. Composite material specimens;

[0033] 10. Base; 11. Mounting area; 12. Machining area; 13. Second threaded hole;

[0034] 20. Positioning components;

[0035] 30. Clamping assembly; 31. Clamping part; 32. Second bolt; 33. Lifting block;

[0036] 40. Connecting component; 41. First bolt; 42. Connecting block; 421. First threaded hole; 422. Boss; 423. Slide rail. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0044] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0045] This embodiment provides a fixture for drilling holes in composite material specimens, which can be adapted to clamp composite material specimens of different sizes and configurations, thereby improving processing efficiency and quality and saving production costs.

[0046] like Figures 1-4 As shown, the fixture for drilling holes in composite material specimens mainly includes a base 10, a positioning assembly 20, and a clamping assembly 30. The base 10 has an installation area 11 and a processing area 12, which are located along the height direction of the base 10. Figure 1 (In the Z-axis direction), the height of the machining area 12 is lower than the height of the mounting area 11; the mounting area 11 is used for adaptation and connection with the machine tool platform, and the machining area 12 is used to support the composite material specimen 100. Positioning components 20 are provided in the machining area 12, and multiple positioning components 20 are provided, with each positioning component 20 extending along the length direction of the base 10 (…). Figure 1 (in the X-axis direction) and the width direction ( Figure 1(In the Y-axis direction). Clamping components 30 are disposed in the processing area 12 and detachably connected to the base 10. Multiple clamping components 30 are provided, and the multiple clamping components 30 are arranged along the length and width directions of the base 10, respectively. The clamping end of the clamping component 30 is used to abut against the composite material specimen 100. The clamping end of the clamping component 30 can apply a preload force along the length direction of the base 10 and a preload force along the height direction of the base 10 to the composite material specimen 100; and / or, the clamping end of the clamping component 30 can apply a preload force along the width direction of the base 10 and a preload force along the height direction of the base 10 to the composite material specimen 100.

[0047] Based on the above design, in this embodiment, the base 10 is divided into an installation area 11 and a processing area 12, with the processing area 12 being lower than the installation area 11. This design enables a more stable connection between the base 10 and the machine tool platform, while providing a low processing platform for supporting the composite material specimen 100, reducing the risk of displacement of the composite material specimen 100 in the height direction, thereby improving processing accuracy.

[0048] Multiple positioning components 20 are arranged along the length and width directions of the base 10, enabling multi-directional positioning and fixation of the composite material specimen 100, ensuring its stability during processing. Specifically, the length side of the composite material specimen 100 abuts against the positioning component 20 in the length direction, and the width side abuts against the positioning component 20 in the width direction, forming a right-angle reference. This restricts the translational freedom of the composite material specimen 100 within the plane of the base 10, solving the problem of insufficient positioning accuracy caused by single-direction positioning. Furthermore, the arrangement of the positioning components 20 in the width and length directions can accommodate composite material specimens 100 of different sizes, meeting diverse positioning needs without requiring replacement of the positioning components 20, thus improving processing efficiency.

[0049] The clamping end of the clamping assembly 30 can apply pre-tightening force along the length and width directions (i.e., lateral clamping force) and a pre-tightening force along the height direction (i.e., holding force). The pre-tightening force along the height direction prevents the composite material specimen 100 from warping upwards, while the pre-tightening forces along the length and width directions restrict the displacement of the composite material specimen 100 within the plane of the processing area 12. The three forces work together to fix the composite material specimen 100 in the processing area 12, avoiding any displacement of the composite material specimen 100 during the hole-making process, and significantly improving the hole position accuracy and hole perpendicularity. At the same time, the clamping assembly 30 is detachably connected to the base 10, and the number and position of the clamping assembly 30 can be adjusted according to the size of the composite material specimen 100, thereby adapting to clamp composite material specimens 100 of different sizes and configurations, improving flexibility and applicability, and saving costs.

[0050] In some alternative embodiments, the base 10 is made of aluminum alloy profile, the mounting area 11 and the processing area 12 are integrally formed, and the height of the processing area 12 is 2cm-5cm lower than the height of the mounting area 11.

[0051] In some alternative embodiments, five positioning components 20 are provided along the length of the base 10; and two positioning components 20 are provided along the width of the base 10.

[0052] Optionally, the composite material specimen 100 in this embodiment may be one of carbon fiber reinforced resin matrix composite, glass fiber reinforced resin matrix composite, or aramid fiber reinforced resin matrix composite.

[0053] like Figures 1-2 As shown, in this embodiment, the fixture for making holes in composite material specimens also includes a connecting component 40. The connecting component 40 includes a first bolt 41 and a connecting block 42. The mounting area 11 is provided with a mounting hole, and the connecting block 42 is provided with a first threaded hole 421. The connecting block 42 is located below the base 10 and connected to the machine tool platform. One end of the first bolt 41 passes through the mounting hole and is threadedly connected to the first threaded hole 421.

[0054] The connecting block 42 of the connecting component 40 is located below the base 10. The first bolt 41 passes through the mounting hole of the mounting area 11 from above the base 10 and connects with the first threaded hole 421 of the connecting block 42 below. The connecting block 42, as an intermediate connecting part, can increase the contact area between the base 10 and the machine tool platform, improve the stability of the base 10 installation, and prevent the base 10 from being displaced due to vibration during hole making.

[0055] The first bolt 41 and the connecting block 42 are threaded together. When disassembling, only the first bolt 41 needs to be loosened to separate the base 10 and the connecting block 42, thereby adjusting the position of the base 10 on the machine tool platform (such as moving along the X-axis and Y-axis of the machine tool), improving the installation and adjustment efficiency of the fixture for making holes in composite material specimens.

[0056] like Figure 2As shown, the connecting block 42 in this embodiment has a boss 422 and two slide rails 423. The two slide rails 423 are located on opposite sides of the boss 422 and connected to the boss 422. A first threaded hole 421 is provided on the boss 422. The two slide rails 423 are configured to slide in connection with the slide groove on the machine tool platform. The two slide rails 423 of the connecting block 42 are slidably connected to the machine tool slide groove to form a guide sliding. The cooperation between the slide rail 423 and the slide groove can limit the sliding direction of the connecting block 42 to slide only along the extension direction of the slide groove, avoiding the displacement of the connecting block 42. At the same time, the contact area between the slide rail 423 and the slide groove is small, the sliding friction is smaller, the adjustment of the position of the base 10 is easier, and impurities are less likely to enter the cooperation gap between the slide rail 423 and the slide groove, reducing the risk of sliding jamming.

[0057] The boss 422 of the connecting block 42 is used to set the first threaded hole 421, and the two slide rails 423 are located on opposite sides of the boss 422, forming a symmetrical support structure. The height of the boss 422 is higher than that of the slide rails 423, so that the first threaded hole 421 is far away from the machine tool platform, avoiding interference between the first bolt 41 and the machine tool platform. At the same time, the slide rails 423 are symmetrically distributed on both sides of the boss 422. The axial force generated when the first bolt 41 is tightened can be transmitted through the boss 422 to the slide rails 423 on both sides, and then evenly transmitted to the machine tool platform by the slide rails 423 on both sides, avoiding local deformation of the connecting block 42 and improving the connection stability and service life.

[0058] In some optional embodiments, the positioning component 20 is a positioning pin, the processing area 12 is provided with a positioning hole, one end of the positioning pin is set in the positioning hole, and the height of the other end exceeds the height of the installation area 11, thereby facilitating the positioning of the composite material specimen 100 and reducing or avoiding the phenomenon of displacement.

[0059] The locating pin enables rapid initial positioning of the composite material specimen 100, shortening clamping time. The locating pin is a high-precision cylindrical pin made of hardened steel with high surface hardness and good wear resistance.

[0060] like Figure 1 and Figure 3 As shown, the processing area 12 has a second threaded hole 13. The clamping assembly 30 includes a clamping member, an adjusting member and an elastic member. The clamping member and the adjusting member are connected by the elastic member. The adjusting member passes through the clamping member and is threadedly connected to the second threaded hole 13. The clamping assembly 30 is configured to drive the clamping end of the clamping member to approach or move away from the composite material specimen 100 by rotating the adjusting member.

[0061] Specifically, the adjusting component includes a second bolt 32 and a lifting block 33. One end of the second bolt 32 passes through the lifting block 33 and is threadedly connected to the second threaded hole 13. The clamping component includes clamping portions 31 located on opposite sides of the lifting block 33. Two elastic elements are provided, and both clamping portions 31 are connected to the lifting block 33 through the elastic elements.

[0062] The specific working process of the clamping assembly 30 is as follows: The operator rotates the second bolt 32 clockwise, which causes the lifting block 33 to descend, making it abut against the end face of the processing area 12. That is, the second bolt 32 moves downward, pushing the lifting block 33 connected to it to move downward together. The lifting block 33 transmits the downward force to the two clamping parts 31 through the elastic elements (such as compression springs) on both sides. After receiving the downward force, the clamping parts 31 begin to move downward and outward at the same time. When the clamping end of the clamping part 31 contacts the composite material specimen 100, as the second bolt 32 continues to rotate, the clamping part 31, guided by the inclined surface of the lifting block 33, continuously applies vertical downward pressure and horizontal component force (pre-tightening force along the length or width direction of the base 10), thereby pushing the composite material specimen 100 tightly towards the positioning assembly 20, so that the composite material specimen 100 can be stably fixed by the clamping assembly 30.

[0063] In this embodiment, the lifting block 33 is provided with a first receiving groove on both sides of the lifting block 33, and a second receiving groove is provided on both clamping parts 31. The first receiving groove and the second receiving groove are provided in a one-to-one correspondence, and the elastic element is received in the first receiving groove and the second receiving groove.

[0064] The first receiving groove of the lifting block 33 mates with the second receiving groove of the clamping part 31 to form an elastic element positioning cavity. The elastic element is a cylindrical spring, and the elastic element positioning cavity is cylindrical, which can limit the lateral displacement of the elastic element and ensure that the elastic element is always located in the target position. At the same time, the elastic element positioning cavity can prevent the elastic element from tilting during compression or rebound (such as the spring bending), ensuring that the elastic force is transmitted in a preset direction, and further ensuring that the clamping force of the clamping parts 31 on both sides is uniform.

[0065] like Figure 3 As shown, the lifting block 33 in this embodiment has an inverted trapezoidal structure. The lifting block 33 has an upper base and a lower base, with the area of ​​the upper base being larger than that of the lower base. One end of the second bolt 32 passes through the upper base and the lower base in sequence and is threadedly connected to the second threaded hole 13. The lifting block 33 has an inverted trapezoidal structure with a large upper base and a small lower base, forming a "wide at the top and narrow at the bottom" spatial layout. In this way, when the second bolt 32 is rotated, the clamping parts 31 on both sides can move away from the lifting block 33 under the guidance of the inclined surface of the lifting block 33, thereby clamping the composite material specimen 100.

[0066] In some optional embodiments, the clamping part 31 is provided with an elastic buffer layer on the side facing the composite material specimen 100. The elastic buffer layer is used to avoid damage to the composite material specimen 100 during clamping.

[0067] An elastic buffer layer is provided on the side of the clamping part 31 facing the composite material specimen 100 to form a soft contact. The hardness of the elastic buffer layer is much lower than that of the composite material specimen 100, which can avoid direct contact between the metal and the composite material specimen 100 and avoid the risk of indentation and scratches.

[0068] Optionally, in this embodiment, the elastic buffer layer is made of food-grade silicone rubber, and the surface of the buffer layer is provided with diamond-shaped anti-slip texture.

[0069] In some alternative embodiments, the clamping component 30 in this embodiment can also be configured as the OK clamp disclosed in CN217914842U.

[0070] like Figure 1 and Figure 4 As shown, in this embodiment, multiple second threaded holes 13 are provided, and each second threaded hole 13 corresponds to a clamping assembly 30. The multiple second threaded holes 13 are arranged along the length and width directions of the base 10, respectively. Furthermore, the distances between the second threaded holes 13 arranged along the length direction of the base 10 and the composite material specimen 100 are all different, and the distances between the second threaded holes 13 arranged along the width direction of the base 10 and the composite material specimen 100 are also different, so that the clamping assembly 30 can adapt to clamp composite material specimens 100 of different sizes.

[0071] Multiple second threaded holes 13 are arranged along the length and width directions of the base 10, and the distance between the second threaded holes 13 in the same direction and the composite material specimen 100 is different, forming a multi-position adaptation. The second threaded holes 13 along the length direction can adapt to composite material specimens 100 of different widths, and the second threaded holes 13 along the width direction can adapt to composite material specimens 100 of different lengths. Therefore, when processing composite material specimens 100 of different sizes, it is not necessary to change the base 10; only the corresponding second threaded hole 13 needs to be selected to install the clamping assembly 30. This improves the versatility of the fixture tooling used for making holes in composite material specimens and reduces procurement costs.

[0072] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0073] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A fixture for drilling holes in composite material specimens, characterized in that, include: The base (10) is provided with an installation area (11) and a processing area (12). Along the height direction of the base (10), the height of the processing area (12) is lower than the height of the installation area (11). The installation area (11) is used to be adapted and connected to the machine tool equipment platform, and the processing area (12) is used to support the composite material test piece (100). Positioning component (20), the positioning component (20) is disposed in the processing area (12), the positioning component (20) is configured in multiple ways, and the multiple positioning components (20) are respectively arranged along the length direction and the width direction of the base (10); A clamping assembly (30) is disposed in the processing area (12) and detachably connected to the base (10). Multiple clamping assemblies (30) are provided, and the multiple clamping assemblies (30) are arranged along the length and width directions of the base (10), respectively. The clamping end of the clamping assembly (30) is used to abut against the composite material test piece (100). The clamping end of the clamping assembly (30) can apply a preload force along the length direction of the base (10) and a preload force along the height direction of the base (10) to the composite material specimen (100); and / or, the clamping end of the clamping assembly (30) can apply a preload force along the width direction of the base (10) and a preload force along the height direction of the base (10) to the composite material specimen (100).

2. The fixture for making holes in composite material specimens according to claim 1, characterized in that, The fixture for making holes in composite material specimens also includes a connecting assembly (40), which includes a first bolt (41) and a connecting block (42). The mounting area (11) is provided with a mounting hole, and the connecting block (42) is provided with a first threaded hole (421). The connecting block (42) is located below the base (10) and connected to the machine tool platform. One end of the first bolt (41) passes through the mounting hole and is threadedly connected to the first threaded hole (421).

3. The fixture for making holes in composite material specimens according to claim 2, characterized in that, The connecting block (42) has a boss (422) and two slide rails (423), the two slide rails (423) are located on opposite sides of the boss (422), the first threaded hole (421) is provided on the boss (422), and the two slide rails (423) are configured to slide in connection with the slide groove on the machine tool platform.

4. The fixture for making holes in composite material specimens according to claim 1, characterized in that, The positioning component (20) is a positioning pin, and the processing area (12) has a positioning hole, with one end of the positioning pin set in the positioning hole.

5. The fixture for making holes in composite material specimens according to claim 1, characterized in that, The processing area (12) is provided with a second threaded hole (13). The clamping assembly (30) includes a clamping member, an adjusting member and an elastic member. The clamping member and the adjusting member are connected through the elastic member. The adjusting member passes through the clamping member and is threadedly connected to the second threaded hole (13). The clamping assembly (30) is configured to drive the clamping end of the clamping member to approach or move away from the composite material specimen (100) by rotating the adjusting member.

6. The fixture for making holes in composite material specimens according to claim 5, characterized in that, The adjusting component includes a second bolt (32) and a lifting block (33). One end of the second bolt (32) passes through the lifting block (33) and is threadedly connected to the second threaded hole (13). The clamping component includes clamping portions (31) located on opposite sides of the lifting block (33). The elastic element is provided in two parts, and both clamping portions (31) are connected to the lifting block (33) through the elastic element.

7. The fixture for drilling holes in composite material specimens according to claim 6, characterized in that, The lifting block (33) is provided with a first receiving groove on both sides, and the two clamping parts (31) are provided with a second receiving groove. The first receiving groove and the second receiving groove are provided in a one-to-one correspondence. The elastic element is accommodated in the first receiving groove and the second receiving groove.

8. The fixture for making holes in composite material specimens according to claim 6, characterized in that, The lifting block (33) has an inverted trapezoidal structure. The lifting block (33) has an upper bottom surface and a lower bottom surface. The area of ​​the upper bottom surface is larger than the area of ​​the lower bottom surface. One end of the second bolt (32) passes through the upper bottom surface and the lower bottom surface in sequence and is threadedly connected to the second threaded hole (13).

9. The fixture for making holes in composite material specimens according to claim 6, characterized in that, The clamping part (31) is provided with an elastic buffer layer on the side facing the composite material specimen (100), and the elastic buffer layer is used to avoid damage to the composite material specimen (100) during clamping.

10. The fixture for making holes in composite material specimens according to claim 6, characterized in that, The second threaded hole (13) is provided in multiple ways, and the second threaded hole (13) is provided in a one-to-one correspondence with the clamping assembly (30). The multiple second threaded holes (13) are arranged along the length direction and width direction of the base (10); Furthermore, the distances between the second threaded holes (13) arranged along the length direction of the base (10) and the composite material test piece (100) are all different, and the distances between the second threaded holes (13) arranged along the width direction of the base (10) and the composite material test piece (100) are all different, so that the clamping assembly (30) can be adapted to clamp the composite material test pieces (100) of different sizes.

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