Testing equipment for thermoplastic composite material

Abstract

The invention is suitable for the technical field of testing devices, and provides testing equipment for a thermoplastic composite material. The testing equipment of the thermoplastic composite material is used for testing the interlayer bonding strength of the to-be-tested component; the testing equipment for the thermoplastic composite material comprises a base, a temperature adjusting part and a testing part, and the temperature adjusting part is installed on the base, used for installing a to-be-tested component and capable of adjusting the temperature of the to-be-tested component by making contact with the to-be-tested component; the testing part is installed on the base and can be close to or far away from the base in the first preset direction, the testing part can apply shearing force to the to-be-tested part to enable the to-be-tested part to be broken, and the shearing force can be detected in real time. The temperature adjusting part and the testing part which are matched for use can fully test the to-be-tested part under different temperature conditions, and the design is beneficial to comprehensive evaluation of the performance of the to-be-tested part, so that better understanding of behaviors of the material of the to-be-tested part under different temperature conditions is facilitated.

Description

Technical Field

[0001] The present application belongs to the technical field of testing devices, and more specifically, relates to a testing device for thermoplastic composite materials. Background Art

[0002] FDM (Full name: Fused Deposition Modeling, Chinese name: Fused Deposition Modeling) is an additive manufacturing technology that heats thermoplastic material to a molten state and then deposits it layer by layer to build a three-dimensional object. This technology has significant advantages in manufacturing complex parts and customized products.

[0003] Objects manufactured by FDM technology usually need to be tested for their interlayer bonding strength to evaluate the structural integrity and mechanical properties of the printed parts. In related technologies, the three-point bending test is usually used to test the interlayer bonding strength, but this method cannot fully test the interlayer bonding strength of the tested parts under extreme conditions, which greatly limits the comprehensive evaluation of the performance of the tested parts. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a testing device for thermoplastic composite materials, aiming to solve the technical problem in the related art that the performance of the component to be tested cannot be fully evaluated.

[0005] To achieve the above-mentioned purpose, according to one aspect of the present application, a testing device for thermoplastic composite materials is provided, which is used to test the interlayer bonding strength of a component to be tested; the testing device for thermoplastic composite materials comprises a base, a temperature regulating part and a testing part, wherein the temperature regulating part is installed on the base, is used to install the component to be tested, and can adjust the temperature of the component to be tested by contacting the component to be tested; the testing part is installed on the base, and can approach or move away from the base along a first preset direction, the testing part can break the component to be tested by applying a shear force to the component to be tested, and can detect the shear force in real time.

[0006] Optionally, the temperature regulating part includes a cooling element having a heat absorbing end, the heat absorbing end is used to install the component to be tested, and can adjust the temperature of the component to be tested by contacting the component to be tested; the heat absorbing end absorbs heat after the cooling element is powered on to reduce the temperature.

[0007] Optionally, the temperature regulating part further includes a temperature increasing component, which is installed on the heat absorbing end and generates heat after being powered on to increase the temperature of the heat absorbing end.

[0008] Optionally, the cooling component includes a cooling body and a first cooling body, the cooling body having a heat absorbing end and a heat dissipating end arranged opposite to each other, the heat dissipating end being installed on the first cooling body and releasing heat to the first cooling body after the cooling component is energized; the first cooling body can absorb the heat released by the heat dissipating end by contacting the heat dissipating end; the first cooling body has a cooling cavity, the cooling cavity is used to fill the cooling liquid, and the heat dissipating end blocks the cavity opening of the cooling cavity; the temperature regulating part also includes a cooling component, the cooling component includes a cooling liquid storage body and a second cooling body, the cooling liquid storage body is used to store the cooling liquid and can transport the cooling liquid into the cooling cavity; the second cooling body is connected to the cooling cavity and to the cooling liquid storage body, and the second cooling body can cool the cooling body in the second cooling body.

[0009] Optionally, the testing part includes: a test piece, which can apply a shear force to the part to be tested by directly contacting the part to be tested to cause the part to be tested to break; a force detection piece, on which the test piece is installed, and the force detection piece can detect the shear force in real time; the testing equipment for thermoplastic composite materials also includes a first driving part, which is installed on the base, and the force detection piece is installed on the output end of the first driving part, and the output end of the first driving part can drive the force detection piece to move along a first preset direction.

[0010] Optionally, the test piece can be detachably mounted on the force detection piece.

[0011] Optionally, the testing unit further includes a connecting piece, through which the force detecting piece is mounted on the output end of the first driving unit; the force detecting piece is detachably mounted on the connecting piece, and can adjust the installation position along a second preset direction, and a first preset angle is provided between the second preset direction and the first preset direction; and / or, the connecting piece is detachably mounted on the output end of the first driving unit, and can adjust the installation position along a third preset direction, and a second preset angle is provided between the third preset direction and the first preset direction.

[0012] Optionally, the testing equipment for thermoplastic composite materials further comprises a second driving unit, the second driving unit is mounted on the base, and the cooling element is mounted on the output end of the second driving unit; the output end of the second driving unit can drive the cooling element to move along a third preset direction, and a second preset angle is formed between the third preset direction and the first preset direction; the cooling element is detachably mounted on the output end of the second driving unit, and the mounting position can be adjusted along the first preset direction.

[0013] Optionally, the testing equipment for thermoplastic composite materials further includes a control unit, and the force detection component is electrically connected to the control unit; the cooling component is electrically connected to the control unit, and the temperature regulating unit further includes a temperature detection component, which is installed on the heat absorbing end and is used to detect the temperature of the heat absorbing end, and the temperature detection component is electrically connected to the control unit.

[0014] Optionally, the testing equipment for thermoplastic composite materials further comprises a connecting portion, and the temperature regulating portion is detachably mounted with the component to be tested via the connecting portion.

[0015] The beneficial effect of the thermoplastic composite material testing device provided by the present application is that when the thermoplastic composite material testing device of the present application is used to test the interlayer bonding strength of the component to be tested, the component to be tested is first mounted on the temperature regulating part, and the temperature regulating part is kept at room temperature. At this time, the component to be tested will also be kept at room temperature. Then, the testing part is moved along a first preset direction toward the direction close to the base until the testing part applies a shear force to the component to be tested to cause the component to be tested to break and then stops moving. At this time, the interlayer bonding strength of the component to be tested at room temperature can be obtained by knowing the area of ​​the cross section where the component to be tested breaks and the maximum shear force applied by the testing part. Then, the temperature of the component to be tested is changed by the temperature regulating part, and then the component to be tested at different temperatures is tested again by the testing part, so as to know the interlayer bonding strength of the component to be tested at different temperatures. The temperature control unit and the testing unit used in combination in this application can fully test the components to be tested under different temperature conditions. This design helps to comprehensively evaluate the performance of the components to be tested, thereby helping to better understand the behavior of the materials of the components to be tested under different temperature conditions, which in turn not only helps to provide a basis for material selection and printing parameter optimization, improve the quality and reliability of products printed using FDM technology, but also helps to provide a scientific basis for the development of new materials and process improvements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of the structure of a testing device for a thermoplastic composite material provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the structure of the testing device for the thermoplastic composite material provided in an embodiment of the present application with the testing part hidden;

[0019] Figure 3 A schematic diagram of the structure of the testing equipment for the thermoplastic composite material provided in an embodiment of the present application after the temperature adjustment part and the testing part are hidden;

[0020] Figure 4 A circuit system diagram of a testing device for a thermoplastic composite material provided in an embodiment of the present application;

[0021] The reference numerals in the above drawings are as follows:

[0022] 100. Base;

[0023] 200, temperature adjustment part; 210, cooling element; 211, cooling body; 211a, heat absorption end; 211b, heat dissipation end; 212, first cooling body; 220, heating element; 230, cooling element; 231, cooling liquid storage body; 232, second cooling body; 240, temperature detection element;

[0024] 300, testing part; 310, testing piece; 320, force detection piece; 330, connecting piece; 340, stud;

[0025] 400, first driving part; 410, first base; 420, first screw rod; 430, first polished rod; 440, first slider; 441, first groove; 450, first driving wheel;

[0026] 500, second driving part; 510, second base; 520, second screw rod; 530, second polished rod; 540, second slider; 541, second groove; 550, second driving wheel;

[0027] 600, control unit; 610, computer; 620, digital-to-analog transmitter;

[0028] 700, connecting part;

[0029] 800. Parts to be tested. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element. In the absence of conflict, the embodiments in this application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] It should be understood that the terms "length", "width", "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 drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 application.

[0033] In addition, 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0034] As described in the background technology, FDM (full name: Fused Deposition Modeling, Chinese name: Fused Deposition Modeling) is an additive manufacturing technology that heats thermoplastic materials to a molten state and then deposits them layer by layer to build three-dimensional objects. This technology has significant advantages in manufacturing complex parts and customized products. Objects manufactured using FDM technology usually need to test their interlayer bonding strength to evaluate the structural integrity and mechanical properties of the prints. In related technologies, a three-point bending test is usually used to test the interlayer bonding strength, but this method cannot fully test the interlayer bonding strength of the components to be tested under extreme conditions, which greatly limits the comprehensive evaluation of the performance of the components to be tested.

[0035] Reference Figures 1 to 4 In order to solve the above problems, according to one aspect of the present application, an embodiment of the present application provides a testing device for a thermoplastic composite material, wherein the testing device for a thermoplastic composite material is used to test the interlayer bonding strength of a component to be tested 800; the testing device for a thermoplastic composite material comprises a base 100, a temperature regulating portion 200 and a testing portion 300, wherein the temperature regulating portion 200 is installed on the base 100, and is used to install the component to be tested 800, and can adjust the temperature of the component to be tested 800 by contacting the component to be tested 800; the testing portion 300 is installed on the base 100, and can approach or move away from the base 100 along a first preset direction, and the testing portion 300 can break the component to be tested 800 by applying a shear force to the component to be tested 800, and can detect the shear force in real time.

[0036] In the embodiment of the present application, the component to be tested 800 is made of thermoplastic composite materials, such as acrylonitrile-butadiene-styrene plastic (ABS), polylactic acid (PLA), polyamide (PA), polyetheretherketone (PEEK), and polyurethane (TPU). The component to be tested 800 in the present application is manufactured by FDM technology and is widely used in industrial manufacturing, medical, aerospace, automotive, education and research, new material development, quality monitoring and control, and personalized customized products.

[0037] The interlayer bonding strength of the component under test 800 is The formula is used for calculation, where τ represents the shear strength, i.e., the interlayer bonding strength, F represents the shear force applied by the test section 300 to the component to be tested 800, and A represents the area of ​​the cross section where the component to be tested 800 is broken. The temperature regulating section 200 may include a heating component such as a heating plate and / or a cooling component such as a heat exchanger. The first preset direction is set horizontally, and the test section 300 applies a shear force to the component to be tested 800 by directly contacting the component to be tested 800 to cause the component to be tested 800 to break. In other embodiments, the test section 300 may also apply a shear force to the component to be tested 800 by indirectly contacting the component to be tested 800.

[0038] When the testing device for thermoplastic composite materials of the present application is used to test the interlayer bonding strength of the component to be tested 800, the component to be tested 800 is first mounted on the temperature regulating part 200, and the temperature regulating part 200 is kept at room temperature. At this time, the component to be tested 800 is also kept at room temperature. Then, the testing part 300 is moved along the first preset direction toward the direction close to the base 100 until the testing part 300 applies a shear force to the component to be tested 800 to cause the component to be tested 800 to break and then stops moving. At this time, the interlayer bonding strength of the component to be tested 800 at room temperature can be obtained by knowing the area of ​​the cross section where the component to be tested 800 is broken and the maximum shear force applied by the testing part 300. Then, the temperature of the component to be tested 800 is changed by the temperature regulating part 200, and then the component to be tested 800 at different temperatures is tested again by the testing part 300, so as to know the interlayer bonding strength of the component to be tested 800 at different temperatures. The temperature regulating section 200 and the testing section 300 used together in the present application can fully test the component 800 to be tested under different temperature conditions. This design helps to comprehensively evaluate the performance of the component 800 to be tested, thereby helping to better understand the behavior of the material of the component 800 to be tested under different temperature conditions, which in turn not only helps to provide a basis for material selection and printing parameter optimization, improve the quality and reliability of products printed using FDM technology, but also helps to provide a scientific basis for the development of new materials and process improvements.

[0039] Reference Figures 1 to 4 In one embodiment, the temperature adjustment part 200 includes a cooling element 210, and the cooling element 210 has a heat absorption end 211a. The heat absorption end 211a is used to install the component to be tested 800, and can adjust the temperature of the component to be tested 800 by contacting the component to be tested 800; the heat absorption end 211a absorbs heat after the cooling element 210 is powered on to reduce the temperature.

[0040] In this embodiment, the cooling element 210 may be a semiconductor refrigeration sheet, and the component to be tested 800 is installed on the heat absorption end 211a and keeps in contact with the heat absorption end 211a to ensure the cooling efficiency and effect of the cooling element 210. At the same time, the cooling element 210 in the present application can reduce the temperature of the component to be tested 800 to -20°C. In other embodiments, the cooling element 210 may also be a device that can cool the component to be tested 800, such as a thermoelectric cooler, a circulating water cooling system, or an air cooling system. The cooling element 210 is configured to actively reduce the temperature of the component to be tested 800, making the test operation simpler and more efficient, reducing the dependence of the component to be tested 800 on the external ambient temperature, and improving the convenience of the test operation.

[0041] Reference Figures 1 to 4 In one embodiment, the temperature regulating unit 200 further includes a temperature increasing member 220, which is installed on the heat absorbing end 211a and generates heat after being powered on to increase the temperature of the heat absorbing end 211a.

[0042] In this embodiment, the heating element 220 is installed on the heat absorbing end 211a to contact the heat absorbing end 211a, and conducts heat to the heat absorbing end 211a by contacting the heat absorbing end 211a. The heating element 220 is a heating plate, preferably a polyimide heating plate; the heating element 220 is attached to the heat absorbing end 211a to ensure the heating efficiency and effect of the heating element 220. At the same time, the heating element 220 in the present application can increase the temperature of the component to be tested 800 to 150°C. In other embodiments, the heating element 220 can also be a heating wire or a heating pad. The set heating element 220 can actively increase the temperature of the component to be tested 800. The use of the heating element 220 in conjunction with the cooling element 210 can quickly switch the temperature of the component to be tested 800 between high temperature and low temperature, further making the test operation simpler and more efficient, effectively reducing the dependence on the external ambient temperature, and effectively improving the convenience of the test operation.

[0043] Reference Figures 1 to 4In one embodiment, the cooling element 210 includes a cooling body 211 and a first cooling body 212. The cooling body 211 has a heat absorbing end 211a and a heat dissipating end 211b that are relatively arranged. The heat dissipating end 211b is installed on the first cooling body 212 and releases heat to the first cooling body 212 after the cooling element 210 is powered on; the first cooling body 212 can absorb the heat released by the heat dissipating end 211b by contacting the heat dissipating end 211b.

[0044] In this embodiment, the cooling element 210 is a semiconductor refrigerator; the heat dissipation end 211b is located below the heat absorption end 211a. In other embodiments, the first cooling body 212 may also be a cooling fan or a cooling tower. The first cooling body 212 is provided to cool the heat dissipation end 211b. The first cooling body 212 is used together with the heat dissipation end 211b to effectively discharge the heat on the heat dissipation end 211b, thereby improving the heat dissipation efficiency of the heat dissipation end 211b. This design can not only make the temperature of the heat absorption end 211a lower, thereby enhancing the cooling performance of the cooling element 210, but also reduce the working current required by the cooling element 210 and reduce energy consumption; in addition, this design also helps to extend the service life of the cooling element 210.

[0045] Reference Figures 1 to 4 In one embodiment, the first cooling body 212 has a cooling cavity, which is used to be filled with cooling liquid, and the heat dissipation end 211b blocks the cavity opening of the cooling cavity.

[0046] In this embodiment, the coolant is water, and in other embodiments, the coolant may also be ethylene glycol or propylene glycol. The heat dissipation end 211b blocks and covers the opening of the cooling cavity to contact the first cooling body 212. The first cooling body 212 not only cools the heat dissipation end 211b, but also installs and supports the cooling body 211.

[0047] Reference Figures 1 to 4 In one embodiment, the temperature regulating part 200 also includes a cooling element 230, and the cooling element 230 includes a cooling liquid storage body 231 and a second cooling body 232. The cooling liquid storage body 231 is used to store the cooling liquid and can transport the cooling liquid to the cooling chamber; the second cooling body 232 is connected to the cooling chamber and to the cooling liquid storage body 231. The second cooling body 232 can cool the cooling body in the second cooling body 232.

[0048] In this embodiment, the cooling member 230 is located below the cooling cavity so that the coolant in the cooling cavity can actively flow into the cooling member 230 by its own gravity. The coolant storage body 231 is a cooling storage tank with a suction pump and is fixedly mounted on the base 100. The second cooling body 232 is a cooling seat and is fixedly mounted on the base 100. The second cooling body 232 has a cooling space connected to the cooling cavity and the coolant storage body 231. The cooling space is used to receive the coolant flowing from the cooling cavity to the cooling space by its own gravity, and is used to transport the coolant to the coolant storage body 231. In addition, a cooling fan for cooling the cooling space is installed on the second cooling body 232 to enhance the cooling effect of the coolant. The cooling member 230 in this application is used in conjunction with the first cooling body 212, which not only enables the coolant to circulate, but also effectively cools the coolant, thereby improving the heat dissipation efficiency of the heat dissipation end 211b. The coolant storage body 231 is provided to provide coolant for the cooling member 230 and the first cooling body 212.

[0049] Reference Figures 1 to 4 In one embodiment, the test section 300 includes a test piece 310 and a force detection piece 320, wherein the test piece 310 can apply a shear force to the component 800 to be tested by directly contacting the component 800 to break the component 800; the test piece 310 is mounted on the force detection piece 320, and the force detection piece 320 can detect the shear force in real time. The test equipment for thermoplastic composite materials also includes a first driving unit 400, which is mounted on the base 100, and the force detection piece 320 is mounted on the output end of the first driving unit 400, and the output end of the first driving unit 400 can drive the force detection piece 320 to move along a first preset direction.

[0050] When the test part 300 in the present application is used to test the component to be tested 800, the output end of the first driving part 400 is first used to drive the force detection member 320 and the test member 310 to move in the direction close to the base 100 along the first preset direction. During this process, the test member 310 will be in direct contact with the component to be tested 800; with the continuous movement of the output end of the first driving part 400, the test member 310 will apply a gradually increasing shear force to the component to be tested 800 until the component to be tested 800 breaks, at which time the output end of the first driving part 400 can be stopped from moving; then, by knowing the area of ​​the cross section where the component to be tested 800 breaks and the maximum shear force detected by the force detection member 320, the interlayer bonding strength of the component to be tested 800 can be known. The set test member 310 avoids direct contact between the force detection member 320 and the component to be tested 800, ensures the integrity of the force detection member 320, and extends the service life of the force detection member 320. The first driving unit 400 is provided to drive the force detecting member 320 and the testing member 310 to move.

[0051] Reference Figures 1 to 4 In one embodiment, the test piece 310 is detachably mounted on the force detection piece 320. In this embodiment, the test piece 310 is a stud, and the force detection piece 320 is a force sensor. To ensure the accuracy of the test, a threaded hole is provided on the surface of the force sensor, and the test piece 310 is detachably mounted in the threaded hole by threaded fitting. The above design enables the force sensor to be installed with test pieces 310 of different sizes, so that the test section 300 can test components 800 of different sizes to be tested, thereby broadening the test range. In other embodiments, the test piece 310 can also be detachably mounted on the force detection piece 320 using connecting screws.

[0052] In addition, in order to reduce the friction between the test piece 310 and the component to be tested 800 and reduce the test error, the test piece 310 is a polytetrafluoroethylene stud.

[0053] Reference Figures 1 to 4 In one embodiment, the testing unit 300 further includes a connecting member 330, and the force detecting member 320 is mounted on the output end of the first driving unit 400 through the connecting member 330; the force detecting member 320 is detachably mounted on the connecting member 330, and the mounting position can be adjusted along a second preset direction, and there is a first preset angle between the second preset direction and the first preset direction.

[0054] In this embodiment, the second preset direction is a vertical direction, and the first preset angle is 90°. In other embodiments, the first preset angle may also be an acute angle. The connector 330 is an angle code, and the connector 330 is mounted on the output end of the first drive unit 400. At the same time, the connector 330 is provided with a connecting through hole arranged along the second preset direction. The force detection member 320 is detachably mounted on the connector 330 through a stud 340 and two connecting nuts used in conjunction, and the installation position can be adjusted along the second preset direction. Specifically, a connecting threaded hole is provided on the force detection member 320, and the stud 340 is inserted into the connecting threaded hole and is threadedly matched with the hole wall of the connecting threaded hole. At the same time, the stud 340 is inserted into the connecting through hole and is fixedly mounted on the connector 330 through two connecting nuts. The provided connector 330 plays the role of connecting the force detection member 320 and the output end of the first drive unit 400. The force detection member 320 is detachably mounted on the connection member 330, and the design that the mounting position can be adjusted along the second preset direction helps to adjust the height of the test member 310, thereby helping the test member 310 to test components 800 of different sizes, thereby broadening the test range. The stud 340 ensures the accuracy of force transmission.

[0055] Reference Figures 1 to 4In one embodiment, the first driving unit 400 includes a first base 410, a first screw rod 420, a first light rod 430, a first slider 440 and a first driving wheel 450, wherein the first base 410 is arranged along a first preset direction and is fixedly mounted on the base 100; the first screw rod 420 is arranged along a first preset direction and can rotate on the first base 410; the number of the first light rods 430 is two, and the two first light rods 430 are respectively located on opposite sides of the first screw rod 420, and the two first light rods 430 The first slider 440 is threadedly matched with the first screw rod 420, and the first slider 440 is installed on the two first light rods 430, and can slide on the two first light rods 430 along the first preset direction. The connecting member 330 is installed on the first slider 440, and the first slider 440 forms the output end of the first driving part 400; the first driving wheel 450 is installed on the first screw rod 420, and can drive the first screw rod 420 to rotate on the first base 410. The first driving part 400 can drive the connecting member 330 to approach or move away from the base 100 along the first preset direction, so as to realize the test operation of the component 800 to be tested.

[0056] Reference Figures 1 to 4 In one embodiment, the connecting member 330 is detachably mounted on the output end of the first driving unit 400, and the mounting position can be adjusted along a third preset direction, and a second preset angle is formed between the third preset direction and the first preset direction.

[0057] In this embodiment, the third preset direction is a horizontal direction, the second preset angle is 90°, and the angle between the third preset direction and the second preset direction is also 90°. In other embodiments, the second preset angle may be an acute angle, and the angle between the third preset direction and the second preset direction may also be an acute angle.

[0058] The output end of the first driving part 400 is provided with a plurality of first grooves 441 in sequence along the third preset direction. The first grooves 441 are stepped grooves in the shape of a "convex" character. The connecting member 330 is detachably mounted on the output end of the first driving part 400 through a connecting bolt with a head and a connecting nut used in conjunction. Specifically, the connecting member 330 is provided with a first connecting through hole. The head of the connecting bolt with a head is inserted into one of the plurality of first grooves 441. The groove wall of the first groove 441 restricts the head of the connecting bolt with a head from being separated from the first groove 441 along the second preset direction. Meanwhile, the remaining portion of the connecting bolt with a head sequentially passes through the first groove 441 and the first connecting through hole and is fixedly mounted on the connecting member 330 through the connecting nut, so that the connecting member 330 can be detachably mounted on the output end of the first driving part 400. Meanwhile, by installing the head of the connecting bolt with a head into other first grooves 441, the installation position of the connecting member 330 can be adjusted along the third preset direction. By adopting the above design, the position of the test part 300 can be adjusted, so as to help the test part 300 adapt to different test environments and improve the adaptability of the test equipment for thermoplastic composite materials. In other embodiments, the output end of the first drive part 400 can also be provided with a plurality of spaced connection threaded holes along the third preset direction, and the connecting member 330 can be detachably mounted on the output end of the first drive part 400 by means of a connection bolt and a threaded fit with some of the plurality of connection threaded holes, and the position adjustment can be achieved.

[0059] Reference Figures 1 to 4 In one embodiment, the testing equipment for thermoplastic composite materials further includes a second driving unit 500, which is mounted on the base 100, and the cooling element 210 is mounted on the output end of the second driving unit 500; the output end of the second driving unit 500 can drive the cooling element 210 to move along a third preset direction, and the third preset direction has a second preset angle with the first preset direction.

[0060] In this embodiment, the third preset direction is a horizontal direction, the second preset angle is 90°, and the angle between the third preset direction and the second preset direction is also 90°. In other embodiments, the second preset angle may be an acute angle, and the angle between the third preset direction and the second preset direction may also be an acute angle. The second driving unit 500 is configured to drive the cooling element 210 to move along the third preset direction, so that the testing unit 300 can test the components 800 to be tested at different positions respectively, thereby improving the testing efficiency.

[0061] Reference Figures 1 to 4In one embodiment, the second driving unit 500 includes a second base 510, a second screw rod 520, a second polished rod 530, a second slider 540 and a second driving wheel 550, wherein the second base 510 is arranged along a third preset direction and is fixedly mounted on the base 100; the second screw rod 520 is arranged along the third preset direction and can rotate on the second base 510; the number of the second polished rods 530 is two, and the two second polished rods 530 are respectively located on opposite sides of the second screw rod 520, and the two second polished rods 530 The second slider 540 is threadedly matched with the second screw rod 520, and the second slider 540 is installed on the two second light rods 530 and can slide on the two second light rods 530 along the third preset direction. The connecting member 330 is installed on the second slider 540, and the second slider 540 forms the output end of the second driving part 500; the second driving wheel 550 is installed on the second screw rod 520 and can drive the second screw rod 520 to rotate on the second base 510. The set second driving part 500 can drive the cooling part 210 to move along the third preset direction, so that the testing part 300 can test the components 800 to be tested at different positions respectively.

[0062] Reference Figures 1 to 4 In one embodiment, the cooling element 210 is detachably mounted on the output end of the second driving unit 500, and the mounting position can be adjusted along a first preset direction.

[0063] In this embodiment, a plurality of second grooves 541 are sequentially provided on the output end of the second driving part 500 along the first preset direction, and the second grooves 541 are stepped grooves in the shape of a "convex" character. The cooling element 210 is detachably mounted on the output end of the second driving part 500 through a connecting bolt with a head and a connecting nut used in conjunction. Specifically, a second connecting through hole is provided on the cooling element 210, and the head of the connecting bolt with a head is inserted into one of the plurality of second grooves 541. The groove wall of the second groove 541 restricts the head of the connecting bolt with a head from being separated from the second groove 541 along the second preset direction. At the same time, the remaining part of the connecting bolt with a head sequentially passes through the second groove 541 and the second connecting through hole and is fixedly mounted on the cooling element 210 through the connecting nut, so that the cooling element 210 can be detachably mounted on the output end of the second driving part 500. At the same time, by installing the head of the connecting bolt with a head into other second grooves 541, the installation position of the cooling element 210 can be adjusted along the first preset direction. By adopting the above design, the position of the cooling element 210 can be adjusted, so as to help the cooling element 210 adapt to different test environments and improve the adaptability of the test equipment for thermoplastic composite materials. In other embodiments, the output end of the second driving part 500 can also be provided with a plurality of spaced connection threaded holes along the first preset direction, and the cooling element 210 can be detachably mounted on the output end of the second driving part 500 by means of a connection bolt and a part of the plurality of connection threaded holes in threaded engagement, and the position adjustment can be achieved.

[0064] Reference Figures 1 to 4 In one embodiment, the testing device for thermoplastic composite materials further includes a control unit 600 , and the force detection component 320 is electrically connected to the control unit 600 .

[0065] In this embodiment, the control unit 600 includes a computer 610 and a digital-to-analog transmitter 620. The digital-to-analog transmitter 620 is installed on the base 100. The digital-to-analog transmitter 620 is electrically connected to the force detection member 320 to convert the analog signal detected by the force detection member 320 into a digital signal. The computer 610 is electrically connected to the digital-to-analog transmitter 620 and is responsible for reading, displaying, recording and analyzing data. The control unit 600 is provided to help the various electronic components in the test equipment of the thermoplastic composite material to achieve linkage. In addition, the computer 610 has an intuitive user interface, which enables the operator to easily set test parameters, start the test process and view test results. The user interface can be a touch screen or computer-based software, providing graphical operation guidance and result display.

[0066] Reference Figures 1 to 4In one embodiment, the cooling component 210 is electrically connected to the control unit 600, and the heating component 220 is electrically connected to the control unit 600; the temperature regulating unit 200 also includes a temperature detecting component 240, which is installed on the heat absorbing end 211a and is used to detect the temperature of the heat absorbing end 211a, and the temperature detecting component 240 is electrically connected to the control unit 600.

[0067] In this embodiment, the cooling body 211 is electrically connected to the computer 610, and the heating element 220 is electrically connected to the computer 610; the temperature detection element 240 includes a thermocouple and a temperature display, the thermocouple is fixedly mounted on the heat absorbing end 211a and is electrically connected to the temperature display, and the thermocouple detects the temperature of the heat absorbing end 211a by contacting the heat absorbing end 211a; the temperature display is electrically connected to the computer 610. The temperature detection element 240 can detect the temperature of the heat absorbing end 211a in real time, so that the real-time temperature of the component to be tested 800 can be detected in real time, which is helpful to accurately control the temperature of the component to be tested 800.

[0068] Reference Figures 1 to 4 In one embodiment, the testing device for thermoplastic composite materials further includes a connecting portion 700 , and the temperature regulating portion 200 is detachably mounted with a component to be tested 800 via the connecting portion 700 .

[0069] In this embodiment, the connecting portion 700 is a connecting bolt or a connecting stud with a head, the temperature reducing member 210 is provided with a connecting threaded hole for the connecting portion 700 to pass through, and the component to be tested 800 is provided with a connecting through hole for the connecting portion 700 to pass through, and the connecting portion 700 passes through the connecting through hole and the connecting threaded hole in sequence, and is threadedly matched with the connecting threaded hole so that the component to be tested 800 can be detachably installed on the temperature regulating portion 200. The provided connecting portion 700 helps to install different components to be tested 800 on the temperature regulating portion 200, so that the testing portion 300 can test different components to be tested 800, thereby broadening the testing range of the testing equipment for thermoplastic composite materials.

[0070] In summary, the testing device for thermoplastic composite materials provided in this embodiment has at least the following beneficial technical effects: when the testing device for thermoplastic composite materials of the present application is used to test the interlayer bonding strength of the component to be tested 800, the component to be tested 800 is first installed on the temperature adjustment part 200, and the temperature adjustment part 200 is kept at room temperature. At this time, the component to be tested 800 is also kept at room temperature. Then, the testing part 300 is moved in the first preset direction toward the base 100 until the testing part 300 applies a shear force to the component to be tested 800 to break the component to be tested 800 and then stops moving. At this time, the interlayer bonding strength of the component to be tested 800 at room temperature can be obtained by knowing the area of ​​the cross section where the component to be tested 800 is broken and the maximum shear force applied by the testing part 300. Then, the temperature of the component to be tested 800 is changed by the temperature adjustment part 200, and then the component to be tested 800 at different temperatures is tested again by the testing part 300, so as to know the interlayer bonding strength of the component to be tested 800 at different temperatures. The temperature regulating section 200 and the testing section 300 used together in the present application can fully test the component 800 to be tested under different temperature conditions. This design helps to comprehensively evaluate the performance of the component 800 to be tested, thereby helping to better understand the behavior of the material of the component 800 to be tested under different temperature conditions, which in turn not only helps to provide a basis for material selection and printing parameter optimization, improve the quality and reliability of products printed using FDM technology, but also helps to provide a scientific basis for the development of new materials and process improvements.

[0071] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A testing device for thermoplastic composite materials, characterized in that: Used to test the interlayer bonding strength of the component to be tested; the testing equipment for the thermoplastic composite material comprises a base, a temperature regulating part and a testing part, wherein the temperature regulating part is installed on the base, used to install the component to be tested, and can adjust the temperature of the component to be tested by contacting with the component to be tested; The testing part is installed on the base and can approach or move away from the base along a first preset direction. The testing part can break the component to be tested by applying a shear force to the component to be tested, and can detect the shear force in real time.

2. The thermoplastic composite material testing device according to claim 1, characterized in that: The temperature regulating part comprises a cooling element, which has a heat absorbing end. The heat absorbing end is used to install the component to be tested and can adjust the temperature of the component to be tested by contacting the component to be tested. The heat absorbing end absorbs heat after the cooling element is powered on to reduce the temperature.

3. The testing device for thermoplastic composite materials according to claim 2, characterized in that: The temperature regulating part further comprises a temperature increasing component, which is installed on the heat absorbing end and generates heat after being powered on to increase the temperature of the heat absorbing end.

4. The testing device for thermoplastic composite materials according to claim 3, characterized in that: The cooling element comprises a cooling body and a first cooling body, the cooling body has the heat absorbing end and the heat dissipating end arranged opposite to each other, the heat dissipating end is installed on the first cooling body and releases heat to the first cooling body after the cooling element is powered on; the first cooling body can absorb the heat released by the heat dissipating end by contacting with the heat dissipating end; The first cooling body has a cooling cavity, the cooling cavity is used to be filled with cooling liquid, and the heat dissipation end blocks the cavity opening of the cooling cavity; The temperature regulating part also includes a cooling element, which includes a cooling liquid storage body and a second cooling body. The cooling liquid storage body is used to store the cooling liquid and can transport the cooling liquid to the cooling cavity; the second cooling body is connected to the cooling cavity and to the cooling liquid storage body, and the second cooling body can cool the cooling body in the second cooling body.

5. The testing device for thermoplastic composite materials according to any one of claims 2 to 4, characterized in that: The testing part comprises: a testing piece capable of applying the shear force to the component to be tested by directly contacting the component to be tested, so as to cause the component to be tested to break; A force detection member, on which the test member is mounted, and the force detection member is capable of detecting the shear force in real time; The testing equipment for the thermoplastic composite material further comprises a first driving unit, which is mounted on the base, and the force detection component is mounted on an output end of the first driving unit, and the output end of the first driving unit can drive the force detection component to move along the first preset direction.

6. The testing device for thermoplastic composite materials according to claim 5, characterized in that: The test piece is detachably mounted on the force detection piece.

7. The testing device for thermoplastic composite materials according to claim 5, characterized in that: The testing part further comprises a connecting member, and the force detecting member is mounted on the output end of the first driving part through the connecting member; The force detection member is detachably mounted on the connection member, and the mounting position can be adjusted along a second preset direction, wherein a first preset angle exists between the second preset direction and the first preset direction; and / or, The connecting member is detachably mounted on the output end of the first driving unit, and the mounting position can be adjusted along a third preset direction, wherein a second preset angle is formed between the third preset direction and the first preset direction.

8. The testing device for thermoplastic composite materials according to claim 5, characterized in that: The testing device for the thermoplastic composite material further comprises a second driving unit, the second driving unit is mounted on the base, and the cooling element is mounted on an output end of the second driving unit; the output end of the second driving unit can drive the cooling element to move along a third preset direction, and a second preset angle is formed between the third preset direction and the first preset direction; The cooling element is detachably mounted on the output end of the second driving unit, and its mounting position can be adjusted along the first preset direction.

9. The thermoplastic composite material testing device according to claim 5, characterized in that: The testing device for the thermoplastic composite material further comprises a control unit, and the force detection member is electrically connected to the control unit; The temperature-reducing component is electrically connected to the control unit. The temperature-regulating unit further includes a temperature-detecting component, which is mounted on the heat-absorbing end and is used to detect the temperature of the heat-absorbing end. The temperature-detecting component is electrically connected to the control unit.

10. The testing device for thermoplastic composite materials according to any one of claims 1 to 4, characterized in that: The testing equipment for the thermoplastic composite material further comprises a connecting portion, and the temperature regulating portion is detachably mounted with the component to be tested via the connecting portion.

Images