Heating device for detecting thermal expansion coefficient of carbon fiber product and detection system

Abstract

The utility model discloses a heating device and a detection system for detecting the thermal expansion coefficient of a carbon fiber product, and the heating device comprises a support, an accommodating cavity for accommodating the carbon fiber product is formed in the support, and the height of the accommodating cavity is smaller than that of the carbon fiber product, so that the carbon fiber product extends out of the accommodating cavity; the supporting seat is arranged in the bracket, is used for supporting the carbon fiber product and is fixed with the bottom of the carbon fiber product, and the thermal expansion coefficient is smaller than that of the carbon fiber product; the pressing piece is arranged on and fixedly connected with the top surface of the carbon fiber product, and the thermal expansion coefficient of the pressing piece is smaller than that of the carbon fiber product; and the heating part is arranged in the accommodating cavity, surrounds the carbon fiber product arranged in the accommodating cavity and is used for heating and transferring heat to the carbon fiber product. The utility model provides the heating device for the thermal expansion coefficient of the carbon fiber product, which is more convenient and easy to operate, simple in structure and low in cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of carbon fiber product detection, and specifically relates to a heating device and a detection system for detecting thermal expansion coefficient of carbon fiber products. Background Art

[0002] The performance parameter tests of carbon fiber products are mainly concentrated on carbon fiber filament materials, and there are few testing schemes for the thermal expansion performance parameters of finished carbon fiber products.

[0003] Taking the finished carbon fiber pipe fittings as an example, their actual thermal expansion coefficient is not only related to the carbon fiber filaments used, but also to the type and content of resin, etc. Therefore, we also need to measure and evaluate the thermal expansion coefficient of a pipe fitting or a batch of pipe fittings before use, so as to avoid excessive displacement changes caused by temperature changes in certain high-precision application scenarios, which may affect the accuracy of the equipment.

[0004] The testing equipment includes a testing equipment and a heating equipment. The carbon fiber product is heated by the heating equipment, and the corresponding testing is performed by the testing equipment.

[0005] The detection equipment mainly uses optical fiber displacement sensor, micrometer or inductive micrometer, laser measurement sensor;

[0006] The heating equipment is mainly realized by a professional heating box or a variable temperature box, and the entire heating box has a complex structure and high cost.

[0007] Commonly used methods for detecting thermal expansion coefficient include optical fiber displacement sensor method, push rod test method, laser interferometry method, etc.

[0008] Fiber optic displacement sensors are mainly used in optical displacement sensor detection methods. They use fiber optic displacement sensors to measure the axial displacement changes of the two end faces of an object in a variable temperature box or a heating box. The accuracy can reach 0.25um, but it requires a large number of sensors and has a complex structure.

[0009] The ejector rod test method uses a micrometer or an inductive micrometer to measure the displacement change of a sample in a single direction. It is often not very accurate and the equipment is complex.

[0010] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0011] Aiming at the above-mentioned problems existing in the heating device for detecting the thermal expansion coefficient of carbon fiber products in the prior art, the utility model proposes a heating device for detecting the thermal expansion coefficient of carbon fiber products that is more convenient and easy to operate, and has a simple structure and low cost.

[0012] In order to achieve the above utility model / design purpose, the utility model adopts the following technical solutions:

[0013] A heating device for detecting thermal expansion coefficient of a carbon fiber product, comprising:

[0014] A bracket, wherein a receiving cavity for receiving the carbon fiber product is formed inside the bracket, and the height of the receiving cavity is smaller than the carbon fiber product so that the carbon fiber product extends out of the receiving cavity;

[0015] A support seat, arranged inside the bracket, used to support the carbon fiber product and fixed to the bottom of the carbon fiber product, and having an expansion coefficient smaller than the carbon fiber product;

[0016] A pressing part is arranged on the top surface of the carbon fiber product and fixedly connected to the top surface, and its expansion coefficient is smaller than that of the carbon fiber product;

[0017] The heating component is arranged inside the accommodating cavity and surrounds the carbon fiber product arranged in the accommodating cavity, and is used for heating and transferring heat to the carbon fiber product.

[0018] In some embodiments of the present application, it further includes: a temperature controller electrically connected to the heating component and used to adjust the heating temperature of the heating component.

[0019] In some embodiments of the present application, a heat insulating component is further provided between the heating component and the bracket.

[0020] In some embodiments of the present application, the heat insulating component is a heat insulating foam filled between the bracket and the heating component;

[0021] Alternatively, the heat insulating component is a heat insulating film, which is arranged between the bracket and the heating component.

[0022] In some embodiments of the present application, the bracket includes a bracket body, and an opening portion is formed at the top of the bracket body;

[0023] and a connecting portion extending outward from the bottom of the bracket body, wherein a locking hole is provided on the connecting portion;

[0024] The cover body is arranged on the top of the support body and blocks the opening. The cover body is provided with an entrance part for the carbon fiber product to extend into or out of the accommodating cavity.

[0025] In some embodiments of the present application, the cover body includes a first cover member, and the first cover member is provided with a first adjustment slot;

[0026] and a second cover member docking with the first cover member, wherein the second cover member is provided with a second adjusting slot;

[0027] A first threaded hole and a second threaded hole are provided on the top surface of the bracket body;

[0028] A first locking screw is passed through the first adjusting slot and screwed into the first threaded hole to press and fix the first cover member;

[0029] The second locking screw passes through the second adjusting long hole and is screwed and fixed in the second threaded hole to press and fix the second cover member.

[0030] In some embodiments of the present application, the support seat is made of granite or quartz, and the pressing member is made of granite or quartz.

[0031] In some embodiments of the present application, the top surface and the bottom surface of the carbon fiber product are fixedly connected to the pressing member and the support seat respectively through epoxy resin.

[0032] A carbon fiber product thermal expansion coefficient detection system includes the heating device described in the above technical solution, and also includes:

[0033] Three-dimensional coordinate measuring machine, including:

[0034] A measuring table for fixing the bracket;

[0035] and a contact probe located above the measuring table.

[0036] In some embodiments of the present application, a control heating device is also included, and its structure is the same as that of the heating device.

[0037] Compared with the prior art, the advantages and positive effects of the utility model are:

[0038] The heating device in the utility model, whose structural components only include a bracket, a heating component, a support seat and a pressing component, when in use, it is only necessary to place the carbon fiber product in the bracket accommodating cavity, and then the carbon fiber product can be heated by the heating component to achieve the deformation of the carbon fiber product in the accommodating cavity, which is convenient for subsequent measurement. The entire heating device has a small number of structural components, a simple structure, and convenient heating operation;

[0039] In addition, the carbon fiber product is placed in the accommodating cavity, and the heating component is arranged around the carbon fiber product, which can ensure that the carbon fiber product is heated at a uniform temperature and has a good heating effect.

[0040] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 It is a three-dimensional structure of an embodiment of the heating device proposed by the utility model Figure 1 ;

[0043] Figure 2 This is a structural exploded view of an embodiment of the heating device proposed by the utility model;

[0044] Figure 3 It is a three-dimensional structure of an embodiment of the heating device proposed by the utility model Figure 2 ;

[0045] Figure 4 This is a front view of an embodiment of the heating device proposed by the utility model;

[0046] Figure 5 for Figure 4 AA section view.

[0047] In the figure, 100, bracket; 110, accommodating cavity; 120, bracket body; 121, opening; 130, connecting part; 131, locking hole; 200, supporting seat; 300, pressing part; 400, heating component; 500, cover body; 510, entrance; 520, first cover part; 521, first adjusting long hole; 550, second cover part; 551, second adjusting long hole; 530, first locking screw; 540, second locking screw; 600, carbon fiber product. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0049] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore, should not be understood as a limitation on the present invention.

[0050] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In the description of the implementation method, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0052] In the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0053] In some embodiments of the present application, a heating device for detecting the thermal expansion coefficient of a carbon fiber product is provided.

[0054] The heating device is mainly used to heat the carbon fiber product 600 to facilitate subsequent testing of the carbon fiber product 600.

[0055] In some embodiments, the heating device comprises:

[0056] The bracket 100 has a receiving cavity 110 formed therein for receiving the carbon fiber product 600. The height of the receiving cavity 110 is smaller than the carbon fiber product 600 so that the carbon fiber product 600 extends out of the receiving cavity 110.

[0057] The shape of the accommodating cavity 110 is adapted to the carbon fiber product 600 , so that the carbon fiber product 600 can be just fit into the accommodating cavity 110 .

[0058] For the convenience of description, in this embodiment, the carbon fiber product 600 is taken as a carbon fiber tube as an example for explanation, and the corresponding accommodating cavity 110 is an annular cavity.

[0059] In order to prevent the inner wall of the accommodating cavity 110 from directly contacting the carbon fiber product 600 , the accommodating cavity 110 is configured to have an inner diameter greater than an outer diameter of the carbon fiber tube.

[0060] In order to facilitate the measurement of the carbon fiber tube, the height of the accommodating cavity 110 is set to be smaller than the carbon fiber tube, so that the carbon fiber tube can be extended from the accommodating cavity 110 for measurement.

[0061] The support seat 200 is arranged inside the bracket 100 and is used to support the carbon fiber product 600 and be fixed to the bottom of the carbon fiber product 600. Its thermal expansion coefficient is smaller than that of the carbon fiber product 600.

[0062] The support seat 200 is arranged at the bottom position of the accommodating cavity 110. The outer diameter of the support seat 200 is smaller than the inner diameter of the accommodating cavity 110, and a distance is maintained between the support seat 200 and the inner wall of the accommodating cavity 110 to avoid contact and heat transfer between the support seat 200 and the bracket 100, which affects the measurement accuracy of the carbon fiber product 600.

[0063] The support base 200 is made of a material with a thermal expansion coefficient smaller than that of the carbon fiber product 600, mainly to avoid the influence of the thermal expansion coefficient of the support base 200 on the thermal expansion coefficient detection of the carbon fiber tube and the influence of the detection accuracy of the carbon fiber tube.

[0064] In some embodiments, the support seat 200 is made of granite or quartz. The thermal expansion coefficient of granite or quartz is much smaller than that of the carbon fiber tube, which has little effect on the detection of the carbon fiber tube and can ensure the accuracy of the carbon fiber tube detection.

[0065] In some embodiments, when the carbon fiber tube is inserted into the accommodating cavity 110 , its bottom is in contact with the top surface of the support seat 200 , and at the same time, the contact surfaces of the two are fixed together by epoxy resin bonding.

[0066] The thermal expansion coefficient of epoxy resin is also less than 600 of that of carbon fiber products. Therefore, when the carbon fiber tube is heated, the impact on the thermal expansion coefficient detection of the carbon fiber tube is very small, and the accuracy of the carbon fiber tube detection can be guaranteed.

[0067] The pressing member 300 is disposed on the top surface of the carbon fiber product 600 and fixedly connected to the top surface thereof, and its expansion coefficient is smaller than that of the carbon fiber product 600.

[0068] In some embodiments, the pressing member 300 is a quartz plate or a granite plate.

[0069] The thermal expansion coefficient of granite or quartz materials is much smaller than that of carbon fiber tubes, and has little effect on the detection of carbon fiber tubes, thus ensuring the accuracy of carbon fiber tube detection.

[0070] The contact and matching positions of the pressing piece 300 and the top surface of the carbon fiber tube are bonded and fixed by epoxy resin.

[0071] When the carbon fiber tube is heated, the epoxy resin has little effect on the thermal expansion coefficient detection of the carbon fiber tube, which can ensure the accuracy of the carbon fiber tube detection.

[0072] A heating component 400 is arranged inside the accommodating cavity 110 and surrounds the carbon fiber product 600 arranged in the accommodating cavity 110, and is used to heat and transfer heat to the carbon fiber product 600;

[0073] The heating component 400 can generate heat after being powered on and transfer the heat to the carbon fiber tube in the accommodating cavity 110 to heat the carbon fiber tube.

[0074] In order to ensure that the heating component 400 can heat the carbon fiber tube evenly, the heating component 400 is arranged around the carbon fiber tube for heat exchange to evenly transfer heat to the carbon fiber tube.

[0075] In some embodiments, the heating component 400 is an annular heating jacket, which is sleeved around the circumference of the carbon fiber tube and has the same height as the carbon fiber tube to improve the heating effect on the carbon fiber tube.

[0076] The heating device in this embodiment has structural components including only a bracket 100, a heating component 400, a support seat 200 and a pressing component 300. When in use, the carbon fiber product 600 only needs to be placed in the accommodating cavity 110 of the bracket 100, and then the carbon fiber product 600 can be heated by the heating component 400 to achieve deformation of the carbon fiber product 600 in the accommodating cavity 110, which is convenient for subsequent measurement. The entire heating device has a small number of structural components, a simple structure, and convenient heating operation.

[0077] Furthermore, the carbon fiber product 600 is placed in the accommodating cavity 110, and the heating component 400 is arranged around the carbon fiber product 600, which can ensure that the carbon fiber product 600 is heated at a uniform temperature and has a good heating effect.

[0078] In some embodiments of the present application, the device further includes: a temperature controller electrically connected to the heating component 400 and used to adjust the heating temperature of the heating component 400 .

[0079] The thermostat may directly adopt an existing thermostat mechanism, and the thermostat may be connected to the heating component 400 to control the temperature of the heating component 400 .

[0080] For example, during heating, the heating component 400 can be controlled to heat to 50 degrees or 60 degrees according to actual heating requirements, thereby achieving constant temperature control of the heating component 400.

[0081] In some embodiments of the present application, a heat insulating component is further provided between the heating component 400 and the bracket 100, and the heat insulating component can be used to achieve isolation and prevent interference from large fluctuations in external ambient temperature on the interior.

[0082] In some embodiments of the present application, the heat insulating component is a heat insulating foam filled between the bracket 100 and the heating component 400;

[0083] Alternatively, the heat insulating component is a heat insulating film, which is arranged between the bracket 100 and the heating component 400 .

[0084] By providing the heat insulating component, it is possible to isolate the heat generated by the heating component 400, avoid heat loss, and ensure the heating effect on the carbon fiber tube.

[0085] In some embodiments of the present application, the bracket 100 includes a bracket body 120 , and an opening 121 is formed at the top of the bracket body 120 ;

[0086] and a connecting portion 130 extending outward from the bottom of the bracket body 120, wherein a locking hole 131 is provided on the connecting portion 130;

[0087] The connecting portion 130 is a connecting flange around the bottom of the bracket body 120 . When connected, the locking screw passes through the locking hole 131 and is locked and fixed on the measuring table of the three-dimensional coordinate measuring machine to be fixedly connected to the three-dimensional coordinate measuring machine.

[0088] The cover body 500 is disposed on the top of the bracket body 120 and blocks the opening 121 . The cover body 500 is provided with an entrance 510 for the carbon fiber product 600 to extend into or out of the accommodating cavity 110 .

[0089] The inlet 510 is an inlet, and its inner diameter is smaller than the opening 121, so that the carbon fiber tube can be extended or inserted easily. Its inner diameter is adapted to the carbon fiber tube to reduce heat loss during the heating process.

[0090] In some embodiments of the present application, the cover body 500 includes a first cover member 520, and the first cover member 520 is provided with a first adjustment slot 521;

[0091] and a second cover member 550 docking with the first cover member 520, the second cover member 550 being provided with a second adjustment slot 551;

[0092] A first threaded hole and a second threaded hole are provided on the top surface of the bracket body 120;

[0093] The first locking screw 530 passes through the first adjusting slot 521 and is screwed into the first threaded hole to press and fix the first cover member 520;

[0094] The second locking screw 540 passes through the second adjusting long hole 551 and is screwed into the second threaded hole to press and fix the second covering member 550 .

[0095] The cover body 500 is provided in a structure in which two first cover parts 520 and second cover parts 550 are matched with each other, so that the installation can be facilitated.

[0096] Furthermore, the first cover member 520 and the second cover member 550 are respectively provided with a first adjustment long hole 521 and a second adjustment long hole 551, so that the positions of the first cover member 520 and the second cover member 550 can be finely adjusted so that they can adapt to carbon fiber tubes of different outer diameters, thereby improving the versatility of the entire heating device.

[0097] When adjusting, loosen the first locking screw 530 or the second locking screw 540, move the first cover member 520 or the second cover member 550, and after adjusting to the right position, tighten the first locking screw 530 or the second locking screw 540 to fix it.

[0098] In some embodiments of the present application, a carbon fiber product 600 expansion coefficient detection system is provided, comprising: a heating device;

[0099] And a three-coordinate measuring machine, which is mainly used to measure the three-coordinate dimensional parameters of multiple points on the upper surface of the pressed part 300 before and after heating, and the three-coordinate dimensions of an edge of the pressed part 300 before and after heating, and obtain the thermal expansion coefficient of the carbon fiber tube through the measured dimensions.

[0100] Specifically, the three-dimensional coordinate measuring machine includes: a measuring table, which is used to fix the bracket 100 .

[0101] And the detection probe is located above the measuring table, and the detection probe can directly adopt the existing contact probe of the three-coordinate measuring machine.

[0102] The dimension measurement of the press-fit part 300 by the three-dimensional coordinate measuring machine is mainly achieved by detecting the contact between the probe and the press-fit part 300 .

[0103] The three-dimensional coordinate measuring machine can automatically analyze and obtain the thermal expansion coefficient of the carbon fiber product 600 according to the size parameters of the press-fit component 300 provided by the detection probe.

[0104] It is an existing technology that a detection probe measures the three-coordinate dimensions of a surface or point by contacting a surface or edge at multiple points.

[0105] The three-coordinate measuring machine can automatically analyze the axial variation, the curvature and the torsion of the carbon fiber product 600 according to the dimensional parameters of the detection probe. This is also an existing technical means that can be implemented by the three-coordinate measuring machine, which will not be elaborated here.

[0106] The thermal expansion coefficient of the carbon fiber product 600 mainly includes three parameters, namely: the axial displacement of the carbon fiber tube, which can be obtained through the displacement change of the upper surface of the pressing part 300 before and after heating.

[0107] The curvature of the carbon fiber tube can be obtained by measuring the angle change of the upper surface of the pressing member 300 before and after heating.

[0108] If the carbon fiber tube bends before and after heating, it will cause the upper surface of the pressing member 300 fixedly connected to its top surface to tilt, and there is an angle between the upper surface before heating and the upper surface after heating, and the angle is the angle change.

[0109] The twisting degree of the carbon fiber tube can be obtained by the angle change of one edge of the pressing member 300 before and after heating.

[0110] If the carbon fiber tube is not twisted, the position of the edge on the pressing member 300 does not change before and after heating, the angle between the edge before heating and the edge after heating is 0 degrees, and there is no twisting.

[0111] If the carbon fiber tube is twisted, the edge will be twisted, and the position of the edge after heating will change relative to the edge before heating. There will be a twist angle between the edge before heating and the edge after heating, and the twist angle corresponds to the twist degree.

[0112] When measuring the axial displacement, the detection probe may be brought into contact with the upper surface of the pressing member 300 before heating to detect the coordinates of multiple contact points on the upper surface. The number of contact points may be 4 or 5.

[0113] After heating, the coordinates of the above-mentioned contact points on the upper surface of the pressing member 300 are measured by a detection probe, and the three-dimensional coordinate measuring machine can obtain the axial displacement change through the coordinate difference. This is an existing technical means that can be realized by the three-dimensional coordinate measuring machine.

[0114] When testing the curvature of the carbon fiber tube, the three-dimensional coordinate dimensions of the multiple contact points of the probe contacting the upper surface are measured and obtained. The above analysis can also be achieved through the existing three-dimensional coordinate measuring machine, which will not be described in detail here.

[0115] When testing the torsion of the carbon fiber tube, before heating, the three-dimensional coordinates of the multiple contact points are obtained by detecting the contact between the probe and a plurality of contact points on an edge of the pressing member 300 .

[0116] After heating, the three-coordinate dimensions of multiple contact points after heating are obtained by detecting the contact points on the edge of the side head and the pressing part 300. The three-coordinate measuring machine calculates the change in the torsional angle of the edge before and after heating through the front and back three-dimensional coordinate dimensions, which is an existing technical means that can be realized by existing three-coordinate measuring machines.

[0117] In order to realize the detection of this measuring device, a high-precision carbon fiber pipe is selected. The pipe diameter is 50mm and the length is 270mm. The thermal expansion coefficient requirement is: when the temperature rises by 50℃, the axial displacement is required to be no more than 7μm and the end face angle change is no more than 0.04°.

[0118] The carbon fiber tube is placed in the accommodating cavity 110 and heated for measurement. After measurement, it is found that the displacement of the pressing member 300 on the end face is 4 μm, and the end face angle changes by 0.02°, which meets the use requirements.

[0119] In some embodiments of the present application, a control heating device is also included, and its structure is the same as that of the heating device.

[0120] Although the thermal expansion coefficients of epoxy resin, quartz sheets and granite bases are much lower than those of carbon fiber pipes, in order to eliminate the result differences caused by variables as much as possible, this system is equipped with a reference heating device, which has the same structure as the heating device, but the test pieces are replaced with quartz rods or quartz tiles of the same size. The changes measured by the reference heating device can be regarded as the error of the heating device itself.

[0121] When testing the thermal expansion coefficient, the actual thermal expansion coefficient value can be obtained by subtracting the error value of the heating device itself from the value detected by the heating device. The accuracy of the measured thermal expansion coefficient is ensured by comparing the setting of the heating device.

[0122] The carbon fiber product 600 expansion coefficient detection system in this embodiment is coordinated with the existing three-coordinate measuring machine and the heating device, and is measured by the detection probe of the three-coordinate measuring machine, with high measurement accuracy, good measurement effect and more convenient and quick measurement;

[0123] By adopting a heating device with a simple structure for heating, the use of a professional temperature-changing box and complex optical equipment is avoided, making the structure of the entire detection system simpler and reducing costs.

[0124] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A heating device for detecting thermal expansion coefficient of carbon fiber products, characterized in that: A bracket, wherein a receiving cavity for receiving the carbon fiber product is formed inside the bracket, and the height of the receiving cavity is smaller than the carbon fiber product so that the carbon fiber product extends out of the receiving cavity; A support seat, arranged inside the bracket, used to support the carbon fiber product and fixed to the bottom of the carbon fiber product, and having a thermal expansion coefficient smaller than the carbon fiber product; A pressing part is arranged on the top surface of the carbon fiber product and fixedly connected to the top surface, and has a thermal expansion coefficient smaller than that of the carbon fiber product; The heating component is arranged inside the accommodating cavity and surrounds the carbon fiber product arranged in the accommodating cavity, and is used for heating and transferring heat to the carbon fiber product.

2. The heating device for detecting thermal expansion coefficient of carbon fiber products according to claim 1, characterized in that: It also includes: a temperature controller electrically connected to the heating component and used for adjusting the heating temperature of the heating component.

3. The heating device for detecting thermal expansion coefficient of carbon fiber products according to claim 1, characterized in that: A heat insulating component is also arranged between the heating component and the bracket.

4. The heating device for detecting thermal expansion coefficient of carbon fiber products according to claim 3, characterized in that: The heat insulation component is heat insulation foam, which is filled between the bracket and the heating component; Alternatively, the heat insulating component is a heat insulating film, which is arranged between the bracket and the heating component.

5. The heating device for detecting thermal expansion coefficient of carbon fiber products according to claim 1, characterized in that: The bracket includes a bracket body, and an opening is formed at the top of the bracket body; and a connecting portion extending outward from the bottom of the bracket body, wherein a locking hole is provided on the connecting portion; The cover body is arranged on the top of the support body and blocks the opening. The cover body is provided with an entrance part for the carbon fiber product to extend into or out of the accommodating cavity.

6. The heating device for detecting thermal expansion coefficient of carbon fiber products according to claim 5, characterized in that: The cover body comprises a first cover member, and the first cover member is provided with a first adjustment slot; and a second cover member docking with the first cover member, wherein the second cover member is provided with a second adjusting slot; A first threaded hole and a second threaded hole are provided on the top surface of the bracket body; A first locking screw is passed through the first adjusting slot and screwed into the first threaded hole to press and fix the first cover member; The second locking screw passes through the second adjusting long hole and is screwed and fixed in the second threaded hole to press and fix the second cover member.

7. The heating device for detecting thermal expansion coefficient of carbon fiber products according to claim 1, characterized in that: The support seat is made of granite or quartz sheet, and the pressing piece is made of granite or quartz sheet.

8. The heating device for detecting thermal expansion coefficient of carbon fiber products according to claim 1, characterized in that: The top surface and the bottom surface of the carbon fiber product are fixedly connected to the pressing member and the support seat respectively through epoxy resin.

9. A carbon fiber product thermal expansion coefficient detection system, characterized in that: The heating device comprises: a heating device according to any one of claims 1 to 8, and further comprising: Three-dimensional coordinate measuring machine, including: A measuring table for fixing the bracket; and a contact probe located above the measuring table.

10. The carbon fiber product thermal expansion coefficient detection system according to claim 9, characterized in that: Also included is a control heating device, which has the same structure as the heating device.

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