Detection device for rapidly detecting performance of composite prepreg and operation method

Abstract

The invention relates to the technical field of composite material performance detection, in particular to a detection device for rapidly detecting composite material prepreg performance and an operation method. The detection device comprises a heating unit arranged on a platform, the heating unit comprises a shell, a heat preservation and insulation assembly, an electromagnetic heating plate, a tool and a temperature detection mechanism, a cooling mechanism and a push-out mechanism are arranged in the tool, a prepreg sample is arranged in a groove of the tool, the heat preservation and insulation assembly is arranged in the shell, the tool is arranged in the heat preservation and insulation assembly, and the temperature detection mechanism is arranged in the shell. The electromagnetic heating plate is located at the bottom of the tool, the temperature detection mechanism is used for detecting the temperature of the tool, the cooling mechanism is used for cooling the temperature of the tool, and the push-out mechanism is used for pushing out cured resin after extrusion; the pressurizing unit is arranged on one side of the platform and comprises an adjustable spherical pressure head, and the adjustable spherical pressure head is arranged corresponding to the groove; according to the detection device, one-time prepreg sampling can be achieved, multiple properties can be rapidly and accurately detected, the detection efficiency is greatly improved, and the detection period is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of composite material performance detection, and in particular to a detection device and an operation method for quickly detecting the performance of composite material prepreg. Background Art

[0002] Prepreg is an intermediate material made of fiber or fabric impregnated with resin matrix for manufacturing composite materials after drying or prepolymerization. It can be formed in a mold at one time, and ensure the consistency and uniformity of the product, reduce the production cycle, and greatly improve production efficiency and product quality. In addition, prepreg also has good mechanical properties and corrosion resistance, is easy to combine with other materials, and has good processability.

[0003] The mass per unit area is the mass of material per unit area on the surface of the prepreg. It can be used to evaluate the surface density and thickness of the material, and is particularly important for weight control and performance improvement of composite products.

[0004] Gel time is the time required for the resin to reach the gel state under specific temperature conditions. It is an important parameter reflecting the gel process and degree. The gel time of prepreg is a dividing point where the viscosity changes drastically. It has a great influence on the molecular flow, which can affect the reaction rate, processing difficulty, etc. It is of great significance to actual scientific research and production, and can determine the operable time of prepreg after compounding.

[0005] Resin viscosity refers to the resistance and viscosity of the fluid at a certain temperature, which characterizes its flow properties and processing performance.

[0006] Resin fluidity refers to the ability of the resin of the prepreg to flow under a certain temperature and pressure. The greater the resin fluidity, the better the fluidity of the prepreg, and the easier it is to improve the molding quality. It is closely related to the surface smoothness and mechanical properties of the product.

[0007] The curing time is the time it takes for the resin to solidify at a certain temperature, and it also represents the curing time of the prepreg.

[0008] Conventional testing of prepreg properties such as mass per unit area, gel time, resin viscosity, resin fluidity, and curing time requires multiple sampling and sample preparation, which greatly reduces the consistency between parallel samples and the correlation between various properties, thereby affecting the accuracy, consistency, and repeatability of test data. Because each test of prepreg requires separate sample preparation and testing, the test cycle is long and the test efficiency is low. In addition, conventional testing equipment includes presses, large tooling, etc., and the test needs to be carried out in a fixed position, which cannot meet the rapid testing required for production process control. Summary of the invention

[0009] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that each test of prepreg requires separate sample preparation and separate testing, resulting in a long testing cycle and low testing efficiency, thereby providing a testing device and operating method for quickly testing the performance of composite material prepreg.

[0010] In order to solve the above technical problems, the present invention provides a detection device for quickly detecting the performance of composite material prepreg, comprising: a heating unit, which is arranged on a platform, the heating unit comprises a shell and a thermal insulation component, an electromagnetic heating plate, a tooling, and a temperature detection mechanism, the tooling is provided with a cooling mechanism and a pushing mechanism, the prepreg sample is arranged in a groove of the tooling, the thermal insulation component is arranged in the shell, the tooling is arranged in the thermal insulation component, and the electromagnetic heating plate is located at the bottom of the tooling, the temperature detection mechanism is used to detect the temperature of the tooling, and the The cooling mechanism is used to cool the temperature of the tooling, and the pushing mechanism is used to push out the resin that has solidified after extrusion; the pressurizing unit is arranged on one side of the platform, and the pressurizing unit includes an adjustable spherical pressure head, and the adjustable spherical pressure head is arranged corresponding to the groove; the probe unit is arranged on the other side of the platform, and the end of the probe unit is inserted into the groove; the timing unit is arranged above the platform, and is used to record the detection time interval of each performance; the power supply unit is arranged in the platform, and the power supply unit is connected to the heating unit, the pressurizing unit, and the probe unit respectively.

[0011] Furthermore, a conical groove is provided in the tooling, the conical groove is communicated with the groove, and the ejection mechanism is arranged on the groove wall of the conical groove.

[0012] Furthermore, the thermal insulation assembly includes a thermal insulation shell and a thermal insulation cover, and the tooling is located between the thermal insulation shell and the thermal insulation cover.

[0013] Furthermore, the temperature detection mechanism includes a temperature sensor and a temperature controller. There are multiple temperature sensors, and the multiple temperature sensors are arranged on both sides of the tooling, and the multiple temperature sensors are all connected to the temperature controller.

[0014] Furthermore, the cooling mechanism is a cooling water pipe arranged in a serpentine shape inside the tooling.

[0015] Furthermore, the pressurizing unit includes a servo motor and a screw, a crossbeam, and a load sensor. The servo motor is arranged in the platform and connected to the screw. The crossbeam is arranged at the end of the screw away from the servo motor and is located above the platform. The adjustable spherical pressure head is connected to the crossbeam. The load sensor is arranged on the platform and is located at the bottom of the heating unit.

[0016] Furthermore, the timing unit is arranged on the crossbeam.

[0017] Furthermore, the probe unit includes a driving member and a force measuring spring, a mechanical pointer, a telescopic rotating rod, and a disc. The driving member is connected to the force measuring spring, the force measuring spring is connected to the mechanical pointer and is arranged on the side wall of the platform, the telescopic rotating rod is connected to the mechanical pointer, the disc is arranged on the telescopic rotating rod, and the end head is arranged on the disc, and the end head is inserted into the groove.

[0018] Furthermore, the power supply unit is a storage power supply.

[0019] The present invention also provides an operating method of the detection device for rapidly detecting the properties of composite material prepreg, comprising the following steps:

[0020] Step 1: Install the heating unit onto the platform and adjust the spherical pressure head to align with the groove;

[0021] Step 2: The power supply unit starts to work, and a laminated prepreg sample with a predetermined area and number of layers is placed in the groove. The load sensor works to weigh the sample mass and detect the mass per unit area of ​​the prepreg;

[0022] Step 3: The heating unit works, the temperature controller sets the temperature, and the electromagnetic heating starts to heat the tooling;

[0023] Step 4: After the tooling reaches the set temperature, the temperature sensor transmits the signal back to the temperature controller, and the heating unit enters the insulation state;

[0024] Step 5: The timing unit starts recording time;

[0025] Step 6: Adjust the crossbeam of the pressurizing unit, and extend the adjustable spherical press head into the groove to contact the prepreg sample;

[0026] Step 7: Continue to adjust the crossbeam of the pressurizing unit to apply positive pressure to the prepreg sample. The load sensor displays the load value until the pressure reaches the test requirement and the load is maintained continuously.

[0027] Step 8: After the resin is extruded, the resin flows into the groove through the conical slope of the conical groove. A small amount of mold release agent is applied before the internal inspection of the conical groove;

[0028] Step 9: The probe unit starts to work, the end is inserted into the resin, and starts to reciprocate and rotate;

[0029] Step 10: The probe unit continues to run, the end head rotates at a constant speed, the end head is subjected to resin resistance, the force measuring spring is loaded, and the mechanical pointer displays the viscosity value of the prepreg resin at this temperature;

[0030] Step 11, observe the state of the prepreg sample through the observation port, when the resin becomes translucent, the viscosity suddenly increases, and it turns into an elastomer with a cross-linked network structure. When the end head detects that the resin is in a drawing state, the timing unit records the time point, which is the gel time of the prepreg sample at this temperature;

[0031] Step 12: The heating unit and the timing unit continue to work, the probe unit contacts the surface of the prepreg sample extruded resin and reciprocates and retracts. When the resin surface is cured and the end is in rigid contact with the resin, the timing unit records the time point, which is the curing time of the prepreg sample at this temperature;

[0032] Step 13: The pressurizing unit rises, the probe unit retracts, and the cooling mechanism starts working;

[0033] Step 14: The push-out mechanism operates to push the cured resin out of the tooling, and the load sensor works to weigh the mass of the prepreg sample. The ratio of the weight loss of the prepreg sample to the original mass is the fluidity of the prepreg resin;

[0034] Step 15: Turn off the power supply unit, take out the prepreg sample, and the operation is completed.

[0035] The technical solution of the present invention has the following advantages:

[0036] 1. The detection device for rapid detection of composite material prepreg performance provided by the present invention comprises: a heating unit, which is arranged on a platform, the heating unit comprises a shell and a thermal insulation component, an electromagnetic heating plate, a tooling, and a temperature detection mechanism, the tooling is provided with a cooling mechanism and a pushing mechanism, the prepreg sample is arranged in a groove of the tooling, the thermal insulation component is arranged in the shell, the tooling is arranged in the thermal insulation component, and the electromagnetic heating plate is located at the bottom of the tooling, the temperature detection mechanism is used to detect the temperature of the tooling, the cooling mechanism is used to cool the temperature of the tooling, and the pushing mechanism is used to push out the resin cured after extrusion; a pressurizing unit, which is arranged on one side of the platform, the pressurizing unit comprises an adjustable spherical pressure head, and the adjustable spherical pressure head is arranged corresponding to the groove; a probe unit, which is arranged on the other side of the platform, and the end of the probe unit is inserted into the groove; a timing unit, which is arranged above the platform, and is used to record the detection time interval of each performance; a power supply unit, which is arranged in the platform, and the power supply unit is connected to the heating unit, the pressurizing unit, and the probe unit respectively.

[0037] The heating unit is set on the platform, that is, the platform provides an installation position for the heating unit; at the same time, the electromagnetic heating plate on the heating unit heats the tooling, and the shell and thermal insulation components can provide insulation for the tooling to avoid temperature loss. The temperature is detected in real time by a temperature detection mechanism, and the temperature is controlled in real time; wherein, a prepreg sample is set on the tooling, that is, the various properties of the prepreg sample are tested. At the same time, the cooling mechanism is used to cool the tooling to avoid excessive temperature affecting the overall performance test, and then the ejection mechanism is used to push out the resin that has been solidified after extrusion. In the actual testing process, the prepreg sample needs to be pressurized by the adjustable spherical pressure head of the pressurizing unit, and then the extruded resin is tested by the probe unit, and the timing unit records the test time interval of each performance.

[0038] The detection device for quickly detecting the performance of composite material prepreg can realize one-time prepreg sampling and quickly and accurately detect multiple properties, greatly improving the detection efficiency and shortening the detection cycle; the device is small in size and can be adapted to detection at any site; the device is easy to operate and can accurately control the load and detection temperature; the design of the shell and the thermal insulation component belt effectively eliminates the influence of the external temperature difference on the detection; the timing unit works in coordination with other units to accurately record the gel time, curing time, etc.; the probe unit can more objectively determine the sample state and greatly reduce the influence of manual operation factors.

[0039] 2. The detection device for rapid detection of composite material prepreg performance provided by the present invention, the pressurizing unit includes a servo motor and a lead screw, a crossbeam, and a load sensor, the servo motor is arranged in the platform and connected to the lead screw, the crossbeam is arranged at one end of the lead screw away from the servo motor and located above the platform, the adjustable spherical pressure head is connected to the crossbeam, and the load sensor is arranged on the platform and located at the bottom of the heating unit. The pressurizing unit uses a servo motor and a lead screw to drive, and the adjustable crossbeam realizes up and down displacement to apply the required load to the prepreg sample; and the load sensor multi-window is used to respectively display the extrusion positive pressure, the mass of the prepreg sample and the mass of the prepreg sample after weightlessness; and the adjustable spherical pressure head is designed as a universal spherical structure, so that the contact angle between the adjustable spherical pressure head and the prepreg sample can be adjusted, and the extrusion angle can be adjusted according to the actual situation of the upper surface of the prepreg sample to ensure that the prepreg sample is evenly loaded.

[0040] This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the disclosure, nor is it intended to limit the scope of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0042] Figure 1 A schematic diagram of the structure of a detection device for quickly detecting the properties of composite material prepreg provided by the present invention;

[0043] Figure 2 A schematic diagram of the structure of a pressurizing unit of a detection device for rapidly detecting the properties of composite material prepreg provided by the present invention;

[0044] Figure 3 A schematic diagram of the structure of a tooling for a detection device for quickly detecting the properties of composite material prepreg provided by the present invention;

[0045] Figure 4 A cross-sectional view of a tooling of a detection device for quickly detecting the properties of composite material prepreg provided by the present invention;

[0046] Figure 5 A schematic diagram of the structure of the housing of the detection device for quickly detecting the properties of composite material prepreg provided by the present invention;

[0047] Figure 6 A schematic structural diagram of an upper cover of a detection device for rapidly detecting composite material prepreg properties provided by the present invention;

[0048] Figure 7 A schematic diagram of the structure of a pressurizing unit of a detection device for rapidly detecting the properties of composite material prepreg provided by the present invention;

[0049] Figure 8 A schematic structural diagram of a probe unit of a detection device for rapidly detecting composite material prepreg properties provided by the present invention.

[0050] Description of reference numerals:

[0051] 1-heating unit; 101-platform; 102-shell; 103-thermal insulation assembly; 104-electromagnetic heating plate; 105-tooling; 106-temperature detection mechanism; 107-cooling mechanism; 108-pushing mechanism; 109-prepreg sample; 110-groove; 111-conical groove; 112-upper cover; 113-lower trough; 114-insulation shell; 115-insulation cover; 116-temperature sensor; 117-temperature controller; 118-observation port;

[0052] 2-pressurizing unit; 201-adjustable spherical pressure head; 202-servo motor; 203-screw; 204-crossbeam; 205-load sensor;

[0053] 3-probe unit; 301-end; 302-force measuring spring; 303-mechanical pointer; 304-telescopic rotating rod; 305-disc;

[0054] 4- Timing unit;

[0055] 5- Power supply unit. DETAILED DESCRIPTION

[0056] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present disclosure. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0057] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present disclosure 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 cannot be understood as a limitation of the present disclosure. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0058] In the description of the present disclosure, 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; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0059] In the present disclosure, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] The disclosure below provides many different embodiments or examples to realize different structures of the present disclosure. In order to simplify the disclosure of the present disclosure, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present disclosure. In addition, the present disclosure can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present disclosure provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0061] The preferred embodiments of the present disclosure are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0062] See also Figures 1 to 8As shown, the present invention provides a detection device for quickly detecting the performance of composite material prepreg, comprising: a heating unit 1, which is arranged on a platform 101, the heating unit 1 comprises a shell 102 and a thermal insulation component 103, an electromagnetic heating plate 104, a tool 105, and a temperature detection mechanism 106, the tool 105 is provided with a cooling mechanism 107 and a pushing mechanism 108, a prepreg sample 109 is arranged in a groove 110 of the tool 105, the thermal insulation component 103 is arranged in the shell 102, the tool 105 is arranged in the thermal insulation component 103, and the electromagnetic heating plate 104 is located at the bottom of the tool 105, and the temperature detection mechanism 106 is used to detect the temperature of the tool 105. Temperature, the cooling mechanism 107 is used to cool the temperature of the tooling 105, and the pushing mechanism 108 is used to push out the resin that has solidified after extrusion; the pressurizing unit 2 is arranged on one side of the platform 101, and the pressurizing unit 2 includes an adjustable spherical pressure head 201, and the adjustable spherical pressure head 201 is arranged corresponding to the groove 110; the probe unit 3 is arranged on the other side of the platform 101, and the end 301 of the probe unit 3 is inserted into the groove 110; the timing unit 4 is arranged above the platform 101, and is used to record the detection time interval of each performance; the power supply unit 5 is arranged in the platform 101, and the power supply unit 5 is connected to the heating unit 1, the pressurizing unit 2, and the probe unit 3 respectively.

[0063] By setting the heating unit 1 on the platform 101, that is, the platform 101 provides an installation position for the heating unit 1; at the same time, the electromagnetic heating plate 104 on the heating unit 1 heats the tooling 105, and then the shell 102 and the thermal insulation component 103 can provide insulation for the tooling 105 to avoid temperature loss. The temperature is detected in real time by the temperature detection mechanism 106, and the temperature is controlled in real time; wherein, the prepreg sample 109 is set on the tooling 105, that is, the prepreg sample is tested for various properties. At the same time, the cooling mechanism 107 is used to cool the tooling 105 to avoid the temperature being too high and affecting the overall performance test, and then the ejection mechanism 108 is used to push out the resin that is solidified after extrusion. In the actual detection process, the prepreg sample 109 needs to be pressurized by the adjustable spherical pressure head 201 of the pressurizing unit 2, and then the extruded resin is detected by the probe unit 3, and the timing unit 4 records the detection time interval of each performance.

[0064] The detection device for quickly detecting the properties of composite material prepregs can realize one-time prepreg sampling and quickly and accurately detect multiple properties, greatly improving the detection efficiency and shortening the detection cycle; the device is small in size and can be adapted to detection at any site; the device is easy to operate and can accurately control the load and detection temperature; the design of the shell 102 and the thermal insulation component 103 effectively eliminates the influence of the external temperature difference on the detection; the timing unit 4 works in coordination with other units to accurately record the gel time, curing time, etc.; the probe unit 3 can more objectively determine the sample state and greatly reduce the influence of manual operation factors.

[0065] In this embodiment, the heating part adopts an electromagnetic heating plate 104. Compared with conventional heating methods, the thermal efficiency of electromagnetic heating is more than 90%, the thermal retardation is small, the thermal inertia is low, accurate temperature control, high efficiency and energy saving can be achieved, and the insulation is good. The electromagnetic heating acts on the tooling 105 where the prepreg sample 109 is placed.

[0066] After the test, the cooling mechanism 107 works to achieve rapid cooling of the tooling 105, greatly improving the detection efficiency, and the ejection mechanism 108 ejects the cooled and solidified resin. The tooling 105 is made of titanium alloy Ti6Al4V, which has low density, light weight, good toughness, plasticity and high-temperature deformation ability, high high-temperature strength, and can work for a long time at high temperatures. In this embodiment, the appearance size of the tooling 105 is 200mm×150mm×40mm.

[0067] In some optional embodiments, a conical groove 111 is provided in the tooling 105, the conical groove 111 is connected to the groove 110, and the ejection mechanism 108 is provided on the groove wall of the conical groove 111. The conical surface design of the conical groove 111 is more conducive to collecting the extruded resin;

[0068] The ejection mechanism 108 uses pneumatic means to push the extruded resin; and the ejection mechanism 108 uses a step design, which is convenient for observing the state of the sample. Among them, the ejection mechanism 108 is a prior art and will not be described in detail here.

[0069] The material of the shell 102 is a resin-based fiber-reinforced composite material, the reinforcement phase is a woven fabric or a non-woven fabric, and the resin matrix is ​​an epoxy resin. Its main advantages are light weight and high strength, and good corrosion resistance, aging resistance, high temperature resistance, insulation, flame retardancy and other properties.

[0070] The shell 102 includes an upper cover 112 and a lower trough 113 , which are connected by bolts. A rectangular notch is cut on one side of the upper cover 112 to place the prepreg sample 109 , and cooperate with the tooling 105 and the adjustable spherical press head 201 to extrude the required resin.

[0071] In some optional embodiments, the thermal insulation assembly 103 includes a thermal insulation shell 114 and a thermal insulation cover 115 , and the tooling 105 is located between the thermal insulation shell 114 and the thermal insulation cover 115 .

[0072] A heat preservation and insulation component 103 is disposed inside the shell 102 , and the heat preservation and insulation component 103 is closely attached to the inner wall of the shell 102 to avoid the influence of external temperature difference on the detection.

[0073] The thermal insulation assembly 103 also includes a thermal insulation shell 114 and a thermal insulation cover 115 , and the thermal insulation shell 114 and the thermal insulation cover 115 wrap the heating part and the tooling 105 for placing the prepreg sample 109 .

[0074] In some optional embodiments, the temperature detection mechanism 106 includes a temperature sensor 116 and a temperature controller 117 . There are multiple temperature sensors 116 , and the multiple temperature sensors 116 are arranged on both sides of the tooling 105 , and the multiple temperature sensors 116 are all connected to the temperature controller 117 .

[0075] Among them, four temperature sensors 116 are evenly distributed on the upper and lower sides of the tooling 105, and the four temperature sensors 116 are connected to a temperature controller 117. After reaching the set temperature, they are automatically kept warm to achieve real-time and accurate monitoring of the test temperature.

[0076] Specifically, the number of the temperature sensors 116 can be set according to actual conditions.

[0077] In this embodiment, the cooling mechanism 107 is a cooling water pipe arranged in a serpentine shape inside the tooling 105 .

[0078] In some optional embodiments, the pressurizing unit 2 includes a servo motor 202 and a screw 203, a crossbeam 204, and a load sensor 205. The servo motor 202 is disposed in the platform 101 and connected to the screw 203. The crossbeam 204 is disposed at one end of the screw 203 away from the servo motor 202 and is located above the platform 101. The adjustable spherical pressure head 201 is connected to the crossbeam 204. The load sensor 205 is disposed on the platform 101 and is located at the bottom of the heating unit 1.

[0079] The pressurizing unit 2 uses a servo motor 202 and a lead screw 203 to drive the adjustable crossbeam 204 to achieve up and down displacement, thereby applying a required load to the prepreg sample 109; and uses a load sensor 205 to display the extrusion positive pressure, the mass of the prepreg sample 109, and the mass of the prepreg sample 109 after weight loss in multiple windows;

[0080] In addition, the adjustable spherical pressure head 201 is designed as a universal spherical structure, so that the contact angle between the adjustable spherical pressure head 201 and the prepreg sample 109 can be adjusted. The extrusion angle can be adjusted according to the actual situation of the upper surface of the prepreg sample 109 to ensure that the prepreg sample 109 is evenly loaded.

[0081] The timing unit 4 is disposed on the crossbeam 204. The timing unit 4 can record the time interval of each performance test in multiple windows according to the test requirements.

[0082] The main function of the probe unit 3 is to detect the state of the resin to determine the performance parameters of the sample. The probe unit 3 includes a driving member (not shown in the figure) and a force measuring spring 302, a mechanical pointer 303, a telescopic rotating rod 304, and a disc 305. The driving member is connected to the force measuring spring 302, the force measuring spring 302 is connected to the mechanical pointer 303, and is arranged on the side wall of the platform 101, the telescopic rotating rod 304 is connected to the mechanical pointer 303, the disc 305 is arranged on the telescopic rotating rod 304, and the end 301 is arranged on the disc 305, and the end 301 is inserted into the groove 110.

[0083] The driving member is disposed on one side of the platform 101 , and the driving member is connected to the force measuring spring 302 , and can drive the force measuring spring 302 to move.

[0084] The end 301 of the probe unit 3 is designed to be conical, with an S-shaped thread serrated surface, connected to the disc 305 rotor, and can withstand the resistance of the resin. The telescopic rotating rod 304 of the probe unit 3 can be reciprocated and rotated, and can be adaptively adjusted according to actual conditions, so as to match the resin with different extrusion degrees and detect the resin. The probe unit 3 works at a constant speed, and the resin gives a certain resistance to the end 301, which acts on the force measuring spring 302, and the mechanical pointer 303 displays the converted viscosity scale.

[0085] In this embodiment, the power supply unit 5 is a storage power supply. The power supply unit 5 is arranged inside the platform 101, and the power supply unit 5 is connected to the heating unit 1, the pressurizing unit 2, and the probe unit 3 respectively, that is, it provides a power source for the heating unit 1, the pressurizing unit 2, and the probe unit 3, thereby ensuring the normal operation of the heating unit 1, the pressurizing unit 2, and the probe unit 3.

[0086] The present invention also provides an operating method of the detection device for rapidly detecting the properties of composite material prepreg, comprising the following steps:

[0087] Step 1: Install the heating unit 1 on the platform 101, and adjust the spherical pressure head 201 to align with the groove 110;

[0088] Step 2: The power supply unit 5 starts to work, and the laminated prepreg sample 109 with a predetermined area and number of layers is placed in the groove 110, and the load sensor 205 works to weigh the sample mass and detect the mass per unit area of ​​the prepreg;

[0089] Step 3: The heating unit 1 works, the temperature controller 117 sets the temperature, and electromagnetic heating starts to heat the tooling 105;

[0090] Step 4: After the tooling 105 reaches the set temperature, the temperature sensor 116 transmits a signal back to the temperature controller 117, and the heating unit 1 enters the heat preservation state;

[0091] Step 5, the timing unit 4 starts recording time;

[0092] Step 6: adjust the crossbeam 204 of the pressurizing unit 2, and extend the adjustable spherical press head 201 into the groove 110 to contact the prepreg sample 109;

[0093] Step 7: Continue to adjust the crossbeam 204 of the pressurizing unit 2 to apply positive pressure to the prepreg sample 109, and the load sensor 205 displays the load value until the pressure reaches the detection requirement, and continue to maintain the load;

[0094] Step 8: After the resin is extruded, the resin flows into the groove through the conical slope of the conical groove 111, and a small amount of mold release agent is applied before the inside of the conical groove 111 is inspected;

[0095] Step 9: The probe unit 3 starts to work, the end 301 is inserted into the resin, and starts to reciprocate and rotate;

[0096] Step 10: The probe unit 3 continues to operate, the end head 301 rotates at a constant speed, the end head 301 is subjected to the resistance of the resin, the force measuring spring 302 is loaded, and the mechanical pointer 303 displays the viscosity value of the prepreg resin at this temperature;

[0097] Step 11, observe the state of the prepreg sample 109 through the observation port 118, when the resin becomes translucent, the viscosity suddenly increases, and it turns into an elastic body with a cross-linked network structure. When the end 301 detects that the resin is in a drawing state, the timing unit 4 records the time point, that is, the gel time of the prepreg sample 109 at this temperature;

[0098] Step 12, the heating unit 1 and the timing unit 4 continue to work, the probe unit 3 contacts the resin surface of the prepreg sample 109 and reciprocates and retracts, and when the resin surface is cured and the end 301 is in rigid contact with the resin, the timing unit 4 records the time point, that is, the curing time of the prepreg sample 109 at this temperature;

[0099] Step 13: the pressurizing unit 2 is raised, the probe unit 3 is retracted, and the cooling mechanism 107 starts to work;

[0100] Step 14: The push-out mechanism 108 operates to push the cured resin out of the tooling 105, and the load sensor 205 operates to weigh the mass of the prepreg sample 109. The ratio of the weight loss of the prepreg sample 109 to the original mass is the fluidity of the prepreg resin.

[0101] Step 15: turn off the power supply unit 5, take out the prepreg sample 109, and the operation is finished.

[0102] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A detection device for quickly detecting the performance of composite material prepreg, characterized in that: include: A heating unit (1) is arranged on a platform (101), the heating unit (1) comprises a shell (102), a heat preservation and heat insulation component (103), an electromagnetic heating plate (104), a tooling (105), and a temperature detection mechanism (106); a cooling mechanism (107) and a pushing mechanism (108) are arranged in the tooling (105); a prepreg sample (109) is arranged in a groove (110) of the tooling (105); the heat preservation and heat insulation component (103) is arranged in the shell (102); the tooling (105) is arranged in the heat preservation and heat insulation component (103), and the electromagnetic heating plate (104) is located at the bottom of the tooling (105); the temperature detection mechanism (106) is used to detect the temperature of the tooling (105); the cooling mechanism (107) is used to cool the temperature of the tooling (105); and the pushing mechanism (108) is used to push out the resin that is solidified after extrusion; A pressurizing unit (2) is arranged on one side of the platform (101), and the pressurizing unit (2) comprises an adjustable spherical pressure head (201), and the adjustable spherical pressure head (201) is arranged corresponding to the groove (110); A probe unit (3) is disposed on the other side of the platform (101), and an end (301) of the probe unit (3) is inserted into the groove (110); A timing unit (4), arranged above the platform (101), is used to record the detection time interval of each performance; The power supply unit (5) is arranged in the platform (101), and the power supply unit (5) is respectively connected to the heating unit (1), the pressurizing unit (2), and the probe unit (3).

2. A detection device for rapidly detecting the properties of composite material prepreg according to claim 1, characterized in that: A conical groove (111) is arranged in the tooling (105), the conical groove (111) is communicated with the groove (110), and the ejection mechanism (108) is arranged on the groove wall of the conical groove (111).

3. A detection device for rapidly detecting the properties of composite material prepreg according to claim 2, characterized in that: The thermal insulation component (103) comprises a thermal insulation shell (114) and a thermal insulation cover (115), and the tooling (105) is located between the thermal insulation shell (114) and the thermal insulation cover (115).

4. A detection device for quickly detecting the properties of composite material prepreg according to any one of claims 1 to 3, characterized in that: The temperature detection mechanism (106) comprises a temperature sensor (116) and a temperature controller (117). There are multiple temperature sensors (116). The multiple temperature sensors (116) are arranged on both sides of the tooling (105), and the multiple temperature sensors (116) are all connected to the temperature controller (117).

5. A detection device for rapidly detecting composite material prepreg properties according to claim 4, characterized in that: The cooling mechanism (107) is a cooling water pipe arranged in a serpentine shape inside the tooling (105).

6. A detection device for rapidly detecting composite material prepreg properties according to claim 5, characterized in that: The pressurizing unit (2) comprises a servo motor (202), a lead screw (203), a crossbeam (204), and a load sensor (205); the servo motor (202) is arranged in the platform (101) and connected to the lead screw (203); the crossbeam (204) is arranged at one end of the lead screw (203) away from the servo motor (202) and located above the platform (101); the adjustable spherical pressure head (201) is connected to the crossbeam (204); and the load sensor (205) is arranged on the platform (101) and located at the bottom of the heating unit (1).

7. A detection device for rapidly detecting composite material prepreg properties according to claim 6, characterized in that: The timing unit (4) is arranged on the crossbeam (204).

8. A detection device for rapidly detecting the properties of composite material prepreg according to claim 7, characterized in that: The probe unit (3) comprises a driving member and a force measuring spring (302), a mechanical pointer (303), a telescopic rotating rod (304), and a disc (305); the driving member is connected to the force measuring spring (302); the force measuring spring (302) is connected to the mechanical pointer (303) and is arranged on the side wall of the platform (101); the telescopic rotating rod (304) is connected to the mechanical pointer (303); the disc (305) is arranged on the telescopic rotating rod (304); and the end head (301) is arranged on the disc (305); and the end head (301) is inserted into the groove (110).

9. A detection device for rapidly detecting composite material prepreg properties according to claim 8, characterized in that: The power supply unit (5) is a storage power source.

10. An operating method of the detection device for rapid detection of composite material prepreg properties according to claim 8, characterized in that: The following steps are involved: Step 1: Install the heating unit (1) onto the platform (101), and adjust the spherical pressure head (201) to align with the groove (110); Step 2: The power supply unit (5) starts to work, and a laminated prepreg sample (109) of a predetermined area and number of layers is placed in the groove (110), and the load sensor (205) works to weigh the sample mass and detect the mass per unit area of ​​the prepreg; Step 3: The heating unit (1) works, the temperature controller (117) sets the temperature, and electromagnetic heating starts to heat the tooling (105); Step 4: After the tooling (105) reaches the set temperature, the temperature sensor (116) transmits a signal back to the temperature controller (117), and the heating unit (1) enters a heat preservation state; Step 5, the timing unit (4) starts recording time; Step 6: Adjust the crossbeam (204) of the pressurizing unit (2) to extend the adjustable spherical pressure head (201) into the groove (110) to contact the prepreg sample (109); Step 7: Continue to adjust the crossbeam (204) of the pressurizing unit (2) to apply positive pressure to the prepreg sample (109), and the load sensor (205) displays the load value until the pressure reaches the detection requirement, and continue to maintain the load; Step 8: After the resin is extruded, the resin flows into the groove through the conical slope of the conical groove (111), and a small amount of mold release agent is applied before the inside of the conical groove (111) is inspected; Step 9: The probe unit (3) starts to work, the end (301) is inserted into the resin, and starts to reciprocate and rotate. Step 10: The probe unit (3) continues to operate, the end head (301) rotates at a constant speed, the end head (301) is subjected to the resistance of the resin, the force measuring spring (302) is loaded, and the mechanical pointer (303) displays the viscosity value of the prepreg resin at this temperature; Step 11, observe the state of the prepreg sample (109) through the observation port (118), wait until the resin becomes translucent, at which time the viscosity suddenly increases, and it is transformed into an elastic body with a cross-linked network structure, and when the end (301) detects that the resin is in a wire drawing state, the timing unit (4) records the time point, which is the gel time of the prepreg sample (109) at this temperature; Step 12, the heating unit (1) and the timing unit (4) continue to work, the probe unit (3) contacts the surface of the prepreg sample (109) extruded from the resin and reciprocates and retracts, and when the resin surface is cured and the end (301) is in rigid contact with the resin, the timing unit (4) records the time point, which is the curing time of the prepreg sample (109) at this temperature; Step 13: the pressurizing unit (2) is raised, the probe unit (3) is retracted, and the cooling mechanism (107) starts to work; Step 14: The push-out mechanism (108) operates to push the cured resin out of the tooling (105), and the load sensor (205) operates to weigh the mass of the prepreg sample (109). The ratio of the weight loss of the prepreg sample (109) to the original mass is the fluidity of the prepreg resin; Step 15: Turn off the power supply unit (5), take out the prepreg sample (109), and the operation is completed.

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