Rubber material high-temperature tension-torsion fatigue comprehensive testing machine

Abstract

The invention provides a rubber material high-temperature tension-torsion fatigue comprehensive testing machine. The rubber material high-temperature tension-torsion fatigue comprehensive testing machine comprises a rack, a stretching mechanism, a torsion mechanism, a clamp, a sensor and a temperature control box, the stretching mechanism and the twisting mechanism are oppositely arranged on the rack, the opposite ends of the stretching mechanism and the twisting mechanism clamp the rubber product through the clamp, and stretching and twisting of the rubber product are achieved respectively. And a sensor is used for monitoring the load applied to the rubber product in the test process in real time. The temperature control box enables the clamping end of the clamp, the movable end of the stretching mechanism connected with the clamping end and the output shaft of the torsion mechanism to extend into the temperature control box. After the rubber product is clamped, the whole effective test section of the rubber product is completely located in the inner cavity of the temperature control box, and the temperature adjusting device in the temperature control box is adjusted, so that the temperature in the box quickly reaches and is stabilized at a preset value, and the requirement of carrying out tension-torsion fatigue test on the rubber product in different temperature environments is met; finally, the test purposes of tension-torsion combined loading and high-temperature environment simulation are achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of testing machines, and particularly relates to a high-temperature tensile-torsional fatigue comprehensive testing machine for rubber materials. BACKGROUND

[0002] As one of the most widely used high polymer materials, rubber has been increasingly valued in performance research under the background of the continuous development of industrial economy. Fatigue performance is an important basis for evaluating the service life of rubber products, and therefore, it is of great significance to accurately test the fatigue performance of rubber materials. At present, higher requirements are put forward for testing machines in the market, which not only need to have tensile-torsional fatigue testing functions, but also should be able to simulate the high-temperature environment commonly encountered by rubber in actual work, so as to more truly reflect the comprehensive fatigue performance and provide more accurate and meaningful data support for research and analysis.

[0003] However, the fatigue testing machines on the current market generally cannot meet the above requirements. The existing domestic devices are mostly single-function fatigue testing machines with relatively simple functions, while foreign multi-function tensile-torsional fatigue testing machines are mostly driven by hydraulic systems. Since the tensile-torsional load required by rubber materials during testing is not large, the hydraulic system has problems such as response lag and insufficient control accuracy, and is not suitable for the testing conditions of such materials, resulting in obvious limitations of the existing testing machines in simulating actual working conditions and testing accuracy.

[0004] Therefore, how to develop a new type of fatigue testing machine suitable for rubber materials, which can realize tensile-torsional composite loading and simulate high-temperature environment, is a problem to be solved by those skilled in the art. SUMMARY

[0005] The purpose of the present application is to provide a high-temperature tensile-torsional fatigue comprehensive testing machine for rubber materials, which can realize tensile-torsional composite loading and simulate high-temperature environment.

[0006] To solve the above technical problems, the present application provides a high-temperature tensile-torsional fatigue comprehensive testing machine for rubber materials, comprising: a rack, a tensile mechanism, a torsional mechanism, a clamp, a sensor and a temperature control box.

[0007] The fixed end of the tensile mechanism is arranged at one end of the rack, the torsional mechanism is arranged at the other end of the rack, the movable end of the tensile mechanism and the movable end of the torsional mechanism are respectively provided with the clamp, the clamp is used for clamping a rubber product, the movable end of the tensile mechanism moves relative to the fixed end in the tensile test direction to realize the stretching of the rubber product, and the torsional mechanism is used for realizing the torsion of the rubber product.

[0008] The sensor is arranged between the movable end of the tensile mechanism and the clamp, and / or the sensor is arranged between the torsional mechanism and the clamp.

[0009] The temperature control chamber has a door for rubber products to pass through and a temperature control device. Both ends of the temperature control chamber are provided with clearance holes to avoid the fixing end of the clamp. The interior of the temperature control chamber is used to cover the rubber products in order to control the temperature of the rubber products during tensile and torsion tests.

[0010] Optionally, in the above-mentioned high-temperature tensile-torsional fatigue comprehensive testing machine for rubber materials, the clamps on the tensile mechanism are multiple;

[0011] And / or, the clamps on the torsion mechanism are multiple.

[0012] Optionally, in the above-mentioned high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials, the tensile mechanism includes a tensile motor, at least two sets of ball screw assemblies and a crossbeam. At least one set of the ball screw assemblies is respectively provided on both sides of the frame along the tensile test direction. The tensile motor is used to drive the screws of at least one set of the ball screw assemblies to rotate. The screw nuts of all the ball screw assemblies are connected through the crossbeam and move synchronously. The crossbeam is connected to the corresponding fixture.

[0013] Optionally, in the above-mentioned high-temperature tensile-torsional fatigue comprehensive testing machine for rubber materials, the tensile mechanism further includes multiple stroke control blocks for limiting the travel of the crossbeam.

[0014] Optionally, in the above-mentioned high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials, the torsion mechanism includes a torsion motor, a crank-slider assembly, a rack, a gear, a shaft, a bushing, and a clamping link. The rotating shaft of the torsion motor is connected to the crank disc of the crank-slider assembly, the slider of the crank-slider assembly is connected to the rack, the bushing is fixed on the frame, the shaft is rotatably disposed in the bushing and one end is connected to the gear, and the other end is connected to one end of the clamping link. The gear is driven by the rack, and the other end of the clamping link is connected to the corresponding clamp.

[0015] Optionally, in the above-mentioned high-temperature tensile-torsional fatigue testing machine for rubber materials, the clamps on the torsion mechanism are multiple.

[0016] The torsion motor and crank-slider assembly of the torsion mechanism are a set. The number of racks, gears, shafts, bushings and clamping rods of the torsion mechanism are the same as the number of clamps on the torsion mechanism and are multiple sets in a one-to-one correspondence. The slider of the crank-slider assembly is connected to each set of racks through a linkage transmission component.

[0017] Optionally, in the above-mentioned high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials, the linkage transmission component is located at the center of multiple fixtures corresponding to the torsion mechanism.

[0018] Optionally, in the above-mentioned high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials, the fixture includes an operating rod, a connecting rod, a pair of clamping plates, and a connecting frame. The pair of clamping plates are movably mounted on the connecting rod, forming a clamping position between the pair of clamping plates. The two ends of the connecting rod are locked into the connecting frame by nuts. The end of the operating rod is threaded and threaded to both sides of the connecting frame. By adjusting the depth to which the operating rod is screwed into the connecting frame, the clamping degree of the pair of clamping plates is achieved.

[0019] Optionally, in the above-mentioned high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials, the frame includes an upper frame and a lower frame, the power equipment of the tensile mechanism and the torsion mechanism are both located on the lower frame, and the movable ends of the tensile mechanism and the torsion mechanism are both located on the upper frame.

[0020] Optionally, in the above-mentioned high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials, the power equipment of the tensile mechanism and the torsion mechanism is horizontally installed, and the power equipment of the tensile mechanism and the torsion mechanism is connected to the moving ends of the tensile mechanism and the torsion mechanism respectively through a bevel gear set.

[0021] This invention provides a high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials, the advantages of which are:

[0022] The tensile and torsion mechanisms are mounted opposite each other on the frame. The opposing ends of the tensile and torsion mechanisms clamp the rubber product through fixtures, achieving tensile and torsional stresses respectively. Sensors monitor the load applied to the rubber product in real time during the test. The temperature control chamber allows the clamping ends of the fixtures, the movable end of the connected tensile mechanism, and the output shaft of the torsion mechanism to extend into the chamber. Once the rubber product is clamped, its entire effective test section is located within the internal cavity of the temperature control chamber. Adjusting the temperature control device within the chamber allows the temperature to quickly reach and stabilize at the preset value, thus fulfilling the requirements for tensile and torsional fatigue testing of rubber products under different temperature environments. Ultimately, this achieves the test objective of combined tensile and torsional loading and simulating high-temperature environments. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials provided in an embodiment of the present invention from another angle;

[0026] Figure 3 A functional principle diagram of a high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials provided in an embodiment of the present invention;

[0027] Figure 4 A bottom view of a portion of the torsion mechanism provided in an embodiment of the present invention;

[0028] Figure 5 A schematic diagram of the rack and pinion portion of the torsion mechanism provided in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the fixture provided in an embodiment of the present invention.

[0030] In the image above:

[0031] 100-rack;

[0032] 200 - Tensioning mechanism; 210 - Tensioning motor; 220 - Lead screw; 230 - Lead screw nut; 240 - Crossbeam;

[0033] 300 - Torsion mechanism; 310 - Torsion motor; 320 - Crank-slider assembly; 330 - Rack; 340 - Gear; 350 - Shaft; 360 - Bushing; 370 - Clamping rod;

[0034] 400-Clamp;

[0035] 500-sensor;

[0036] 600-Temperature Control Box. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] The core of this invention is to provide a high-temperature tensile-torsional fatigue comprehensive testing machine for rubber materials, which can realize tensile-torsional composite loading and simulate high-temperature environment.

[0039] To enable those skilled in the art to better understand the technical solutions provided by the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] For details, please refer to Figures 1-6The present invention provides a high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials, which is used to simulate the service environment of rubber products under complex thermomechanical loads and realize the fatigue test of tensile and torsional composite. Specifically, it includes: frame 100, tensile mechanism 200, torsion mechanism 300, fixture 400, sensor 500 and temperature control box 600.

[0041] The frame 100 provides a stable support foundation for the entire testing machine. It is usually made of high-rigidity steel or cast iron to ensure the stability of the whole machine during the test.

[0042] The fixed end of the tensioning mechanism 200 is located at one end of the frame 100, and the movable end of the tensioning mechanism 200 moves relative to the fixed end along the tensile test direction to apply tensile or compressive loads to the rubber product. The torsion mechanism 300 is located at the other end of the frame 100, opposite to the tensioning mechanism 200, and is used to apply torsion to the rubber product. Both the movable ends of the tensioning mechanism 200 and the torsion mechanism 300 are equipped with clamps 400, forming a clamping space between them for holding the rubber product. The clamps 400 on the tensioning mechanism 200 and the torsion mechanism 300 reliably clamp both ends of the rubber product.

[0043] The fixture 400 can take the form of a mechanical wedge clamp, hydraulic clamp, or pneumatic clamp to accommodate samples of different shapes and sizes. To ensure the effective transmission of torsional motion, the fixture 400, connected to the torsion mechanism 300, can rotate together with the output shaft.

[0044] Sensor 500 is positioned between the movable end of the tensile mechanism 200 and the clamp 400, and / or, sensor 500 is positioned between the torsion mechanism 300 and the clamp 400. Sensor 500 is used to monitor the loads (tensile and torque) applied to the standard specimen (i.e., the rubber product) in real time during the test. As one embodiment, sensors can be positioned in two locations. For example, a tensile sensor is positioned between the movable end of the tensile mechanism 200 and the clamp 400. This tensile sensor can accurately measure the tensile or compressive force along the axial direction of the rubber product. A torque sensor is positioned between the output shaft of the torsion mechanism 300 and the clamp 400. This torque sensor can accurately measure the torque applied to the rubber product. The tensile and torque sensors transmit the acquired force / torque signals in real time to the testing machine's control system (not shown in the figure), forming a closed-loop control to precisely control the amplitude, frequency, and waveform of the load.

[0045] The temperature control chamber 600 has a door for rubber products to pass through and a temperature control device. Both ends of the temperature control chamber 600 have clearance holes to allow the clamping end of the clamp 400, the movable end of the connected tensile mechanism 200, and the output shaft of the torsion mechanism 300 to extend into the temperature control chamber 600. After the rubber product is clamped, its entire effective test section is completely located within the internal cavity of the temperature control chamber 600. The interior of the temperature control chamber 600 encloses the rubber product to control its temperature during tensile and torsion tests. Specifically, the temperature control chamber 600 can be a sealed chamber composed of insulation material and a built-in temperature control device (heating / cooling function). The temperature control chamber 600 contains a heating element (such as a quartz heating element) and is equipped with a high-precision temperature sensor (such as a thermocouple or platinum resistance thermometer). The control system uses PID regulation to adjust the temperature control device based on the set temperature value and feedback from the temperature sensor, so that the temperature inside the chamber can quickly reach and stabilize at the preset value, thereby meeting the requirements for tensile and torsional fatigue testing of rubber products under different temperature environments.

[0046] The high-temperature tensile and torsional fatigue testing machine for rubber materials provided in this solution has a tensile mechanism 200 and a torsional mechanism 300 mounted opposite each other on a frame 100. The opposite ends of the tensile mechanism 200 and the torsional mechanism 300 are clamped by a fixture 400 to hold the rubber product, achieving tensile and torsional stresses respectively. A sensor 500 monitors the load applied to the rubber product in real time during the test. The temperature control chamber 600 allows the clamping end of the fixture 400, the movable end of the tensile mechanism 200, and the output shaft of the torsional mechanism 300 to extend into the chamber. When the rubber product is clamped, its entire effective test section is located within the internal cavity of the temperature control chamber 600. Adjusting the temperature control device within the chamber allows the temperature to quickly reach and stabilize at a preset value, thus fulfilling the requirements for tensile and torsional fatigue testing of rubber products under different temperature environments, ultimately achieving the test objective of combined tensile and torsional loading and simulating high-temperature environments.

[0047] In a specific embodiment, the tensioning mechanism 200 includes a tensioning motor 210, at least two sets of ball screw assemblies, and a crossbeam. At least one set of ball screw assemblies with screws 220 is respectively arranged on both sides of the frame 100 along the tensile test direction. The tensioning motor 210 drives the screws 220 of the at least one set of ball screw assemblies to rotate. The screw nuts 230 of all ball screw assemblies are connected through the crossbeam 240 and move synchronously. The crossbeam 240 is connected to the corresponding clamp 400. The crossbeam 240 is slidably connected to the tensioning mechanism guide rails arranged on the frame 100.

[0048] like Figure 1 and Figure 2As shown, the tensioning mechanism 200 uses a tensioning motor 210 as its power source. The torque generated by the tensioning motor 210 acts on the lead screw 220 through a synchronous belt / coupling, causing the lead screw 220 to rotate, which in turn drives the lead screw nut 230 to move in the height direction. The lead screw nut 230 is connected to components such as the nut fixing block and the crossbeam 240, and the crossbeam 240 simultaneously restricts the degrees of freedom of multiple clamps 400, ensuring that the movements of the multiple clamps 400 are synchronized. When the tensioning motor 210 rotates, the tensioning mechanism 200 can operate.

[0049] To limit the travel of the crossbeam 240, the frame 100 is equipped with multiple travel control blocks in the direction of travel of the crossbeam 240 to limit the travel of the lead screw and the crossbeam, avoid kinematic interference in the structure, and ensure the safety and reliability of the overall structure.

[0050] The tensioning mechanism 200 reduces the excessive requirements on the lead screw 220 through the mid-section design. This design can shorten the length of the lead screw 220, avoiding the difficulties that may arise during the manufacturing process due to an excessively long lead screw 220. On the other hand, while shortening the lead screw 220, it can not only enhance the strength of the lead screw 220 and give it a stronger bending resistance, but also improve the overall stability of the tensioning mechanism.

[0051] In a specific embodiment, such as Figure 4 and Figure 5 As shown, the torsion mechanism 300 includes a torsion motor 310, a crank-slider assembly 320, a rack 330, a gear 340, a shaft 350, a bushing 360, and a clamping link 370. The rotating shaft of the torsion motor 310 is connected to the crank disc of the crank-slider assembly 320. The slider of the crank-slider assembly 320 is connected to the rack 330. The bushing 360 is fixed on the frame 100. The shaft 350 is rotatably disposed in the bushing 360 and one end is connected to the gear 340, and the other end is connected to one end of the clamping link 370. The gear 340 is connected to the rack 330 in a transmission connection. The other end of the clamping link 370 is connected to the corresponding clamp 400.

[0052] It should be noted that the crank-slider assembly 320 mainly includes a crank disc, connecting rod, slider, guide rail, and pin. The crank disc, connecting rod, and slider are connected by the pin to achieve axial fixation, and finally, the guide rail is fixed to the frame with bolts. It can convert the rotational motion of the crank disc into the reciprocating linear motion of the slider, and the motion frequency is relatively high. This crank-slider assembly 320 is a conventional design and will not be described in detail here.

[0053] A torsion motor 310 drives the crank disk of a crank-slider assembly 320, and the slider of the crank-slider assembly 320 drives a rack 330 to achieve precise linear reciprocating motion. The rack 330 meshes with a gear 340, converting linear motion into rotational motion. The gear 340 is fixedly connected to a shaft 350, which is supported by a bushing 360 fixed to a base plate to ensure rotational accuracy and stability. The end of the shaft 350 is connected to a clamping rod 370 via a bushing, ultimately outputting a torsional motion of ±45 degrees to the clamp 400.

[0054] The use of bushing 360 in the above scheme can, on the one hand, ensure good perpendicularity between shaft 350 and base plate on frame 100, and alleviate the stability of shaft 350 to shaft center under high frequency tension and torsion. On the other hand, the use of bushing 360 increases the contact area between torsion mechanism 300 and base plate, and alleviates the impact force of load on base plate.

[0055] Based on the above specific embodiments, the clamps 400 on the stretching mechanism 200 are multiple.

[0056] When there are multiple clamps 400 on the tensioning mechanism 200, the multiple clamps 400 are respectively set on the crossbeam 240. For example Figure 2 As shown, the tensioning mechanism 200 corresponds to four clamps 400. Therefore, four sensors 500 are required, each placed above the crossbeam 240, to measure the force applied by the testing machine to the rubber product on the clamps 400. This transmission method enables simultaneous measurement at the four clamp stations, improving measurement efficiency and accuracy. It makes the measurement method more suitable for actual material usage in processes, which is of great practical significance.

[0057] Similarly, the clamps 400 on the torsion mechanism 300 can also be designed as multiple.

[0058] The torsion motor 310 and the crank-slider assembly 320 of the torsion mechanism 300 are a group. The number of racks 330, gears 340, shafts 350, bushings 360 and clamping rods 370 of the torsion mechanism 300 are the same as the number of clamps 400 on the torsion mechanism 300 and are multiple groups that correspond one-to-one. The slider of the crank-slider assembly 320 is connected to each group of racks 330 through a linkage transmission component.

[0059] The aforementioned linkage transmission assembly connects multiple stations of the torsion mechanism 300 simultaneously, serving as an intermediate device between input and output. When the power input from the torsion motor 310 passes through the linkage transmission assembly, the power is divided into multiple parts, causing the clamps 400 at multiple output stations to move simultaneously.

[0060] The linkage transmission assembly is located at the center of the multiple clamps 400 corresponding to the torsion mechanism 300, making the transmission smoother. At the same time, in the direction of movement, the racks 330 on the same side move in the same direction, avoiding interference during movement and reducing the overall size of the mechanism. This design makes the structure more rational.

[0061] Because fatigue testing machines need to perform torsional tests at a frequency of 10Hz and an angle of ±45°, switching back and forth 10 times per second is a function that ordinary motors cannot achieve. Therefore, a specific mechanism is required. This design uses the aforementioned crank-slider and gear-rack combination to first convert rotary motion into repetitive linear motion, and then convert the repetitive linear motion into repetitive torsional motion. This allows rotary motion to be converted into repetitive torsional motion, achieving a function that ordinary motors cannot.

[0062] In a specific embodiment, such as Figure 6 As shown, the clamp 400 includes an operating rod, a connecting rod, a pair of clamping plates, and a connecting frame. The pair of clamping plates are movably mounted on the connecting rod, forming a clamping position between them. The clamping plates can move freely along the direction of the connecting rod. Both ends of the connecting rod are locked into the connecting frame by nuts. The end of the operating rod is threaded and threaded to both sides of the connecting frame. The clamping load is applied by pressing the clamping plates against the head end of the operating rod. The clamping degree of the pair of clamping plates is adjusted by changing the depth to which the operating rod is screwed into the connecting frame.

[0063] The connecting frame is also provided with connecting pin holes for fixing the clamp to the corresponding tension mechanism 200 or torsion mechanism 300.

[0064] Of course, the clamp 400 can also use electric grippers and other equipment, which will not be elaborated here.

[0065] In a specific embodiment, the frame 100 includes an upper frame and a lower frame. The power equipment for the tensioning mechanism 200 and the torsion mechanism 300 is located on the lower frame, and the movable ends of the tensioning mechanism 200 and the torsion mechanism 300 are located on the upper frame.

[0066] The fixed end of the tensioning mechanism 200 (e.g., its drive motor or cylinder) is fixed to one side of the lower frame by bolt connection or integral casting. The movable end of the tensioning mechanism 200 (i.e., the ball screw assembly and crossbeam) is located on the upper frame and can perform precise reciprocating motion along the tensioning direction of the testing machine under the control of the servo motor, thereby applying tensile or compressive loads to the rubber product.

[0067] The fixed end of the torsion mechanism 300 is mounted on the other side of the lower frame, opposite to the fixed end of the tensioning mechanism 200. The fixed end of the torsion mechanism 300, i.e., the power equipment end, preferably includes a servo motor and a high-precision reducer. The servo motor receives commands from the controller, increases the output torque through the reducer, and drives its output shaft to perform precise rotational motion. The torsion mechanism 300 transmits power to the shaft 350, bushing 360, and clamping link 370 mounted on the upper frame via the crank-slider assembly 320, rack 330, and gear 340, all also arranged on the lower frame.

[0068] The overall frame of the frame 100 adopts a vertical four-column support scheme to ensure the overall stability of the testing machine. For the rationality of the structural dimensions, the four stations are arranged in a double symmetrical manner, with sufficient space to facilitate the installation of the temperature control box 600 and to facilitate the future expansion of other functions of the fatigue testing machine.

[0069] Furthermore, by adopting the above-mentioned segmented design scheme, the skeleton structure of the tensile-torsional fatigue testing machine can be optimized, the structural strength of the testing machine can be strengthened, and the overall weight of the testing machine can be reduced, thus achieving a more practical effect.

[0070] Furthermore, the power units for the tensile mechanism 200 and the torsion mechanism 300 are horizontally mounted, and are connected to the moving ends of the tensile mechanism 200 and the torsion mechanism 300 respectively via bevel gear sets. The horizontal mounting of the motors, utilizing a set of bevel gears to change the direction of rotation, lowers the overall height and center of gravity of the testing machine.

[0071] By placing all the heavier components of the aforementioned tensile-torsional fatigue testing machine at the bottom, the center of gravity of the equipment is lowered, ensuring structural stability. This design results in a compact structure, with a base plate positioned between the upper and lower frames. The front of the base plate secures components such as bushings, while the back secures components such as guide rails, utilizing both sides to enhance structural compactness.

[0072] The working process of the high-temperature tensile-torsional fatigue comprehensive testing machine for rubber materials of the present invention is as follows:

[0073] 1. Sample clamping: Open the door of the temperature control chamber 600 and clamp both ends of the rubber product onto the clamps 400 on the side of the stretching mechanism 200 and the side of the torsion mechanism 300, respectively.

[0074] 2. Setting parameters: Set the test temperature of the temperature control chamber 600, the amplitude / frequency / waveform of the tensile load of the tensile mechanism 200, the amplitude / frequency / waveform of the torsion load of the torsion mechanism 300, and the total number of cycles, etc.

[0075] 3. Start the test: The temperature control chamber 600 is started, allowing its internal temperature to quickly reach and stabilize at the set value. The rubber product being tested is stretched using the tensile mechanism 200 (the elongation of the test sample can be measured using an extensometer). Then, at a certain elongation, a torsion fatigue test is performed using the torsion mechanism 300 at a frequency of 10Hz and a rotation angle of ±45 degrees. The rubber material is sinusoidally loaded using the torsion mechanism 300, and the force generated during torsion is measured using a tension-torsion sensor. The measured force is input into a computer for processing, and the computer controls the number of torsion cycles. After a certain number of torsion cycles or even after the rubber material breaks, the damage, cracking, and other deformation mechanisms of the rubber test specimen are studied in depth through microscopic observation.

[0076] In addition, rubber products may experience excessively high temperatures due to repeated loading of various axial forces during actual operation. To better simulate the temperature of rubber products under actual working conditions, the testing machine can also be equipped with a temperature control chamber 600 to change the test temperature and achieve a more realistic test effect. The temperature control range is room temperature to 80°C.

[0077] 4. Data Acquisition: Throughout the test, the tension sensor and torque sensor continuously collect load data and feed it back to the control system for real-time display, recording and monitoring.

[0078] When the test reaches the preset number of cycles, the testing machine will automatically stop running and save all test data.

[0079] The beneficial effects of the technical solution provided by this invention include:

[0080] 1. The test temperature is changed by using a temperature control chamber (600°C) to simulate the actual working conditions of rubber materials. This allows for the simulation of different operating temperatures of rubber materials, enabling the testing of their tensile and torsional fatigue properties at various temperatures.

[0081] 2. The independent tensile mechanism 200 and torsion mechanism 300 are combined into one device, so that the device can meet the needs of both testing the tensile or torsional properties of rubber materials and measuring their comprehensive properties.

[0082] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0083] In the description of this application, "multiple" means two or more. If "first" or "second" is mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0084] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0085] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0086] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0087] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0088] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials, characterized in that, include: The frame (100), tensioning mechanism (200), torsion mechanism (300), clamp (400), sensor (510) and temperature control box (600); The fixed end of the stretching mechanism (200) is located at one end of the frame (100), and the torsion mechanism (300) is located at the other end of the frame (100). The movable end of the stretching mechanism (200) and the movable end of the torsion mechanism (300) are respectively provided with clamps (400). The clamps (400) are used to clamp the rubber product. The movable end of the stretching mechanism (200) moves relative to the fixed end along the stretching test direction to achieve the stretching of the rubber product. The torsion mechanism (300) is used to achieve the torsion of the rubber product. The sensor (500) is disposed between the movable end of the tensioning mechanism (200) and the clamp (400), and / or the sensor (500) is disposed between the torsion mechanism (300) and the clamp (400); The temperature control chamber (600) has a door for passing rubber products and a temperature control device. Both ends of the temperature control chamber (600) are provided with clearance holes for avoiding the fixed end of the clamp (400). The interior of the temperature control chamber (600) is used to cover the rubber products in order to control the temperature of the rubber products during the tensile and torsion test.

2. The high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials according to claim 1, characterized in that, The tensioning mechanism (200) has multiple clamps (400); And / or, the clamps (400) on the torsion mechanism (300) are multiple.

3. The high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials according to claim 1 or 2, characterized in that, The tensioning mechanism (200) includes a tensioning motor (210), at least two sets of ball screw assemblies and a crossbeam. The frame (100) is provided with at least one set of ball screw assemblies with screws (220) on both sides along the tensile test direction. The tensioning motor (210) is used to drive the screws (220) of at least one set of ball screw assemblies to rotate. The screw nuts (230) of all the ball screw assemblies are connected through the crossbeam (240) and move synchronously. The crossbeam (240) is connected to the corresponding clamp (400).

4. The high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials according to claim 3, characterized in that, The tensioning mechanism (200) also includes a plurality of travel control blocks for limiting the travel of the crossbeam (240).

5. The high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials according to claim 1 or 2, characterized in that, The torsion mechanism (300) includes a torsion motor (310), a crank-slider assembly (320), a rack (330), a gear (340), a shaft (350), a bushing (360), and a clamping link (370). The rotating shaft of the torsion motor (310) is connected to the crank disk of the crank-slider assembly (320). The slider of the crank-slider assembly (320) is connected to the rack (330). The bushing (360) is fixed on the frame (100). The shaft (350) is rotatably disposed in the bushing (360) and one end is connected to the gear (340), and the other end is connected to one end of the clamping link (370). The gear (340) is driven by the rack (330). The other end of the clamping link (370) is connected to the corresponding clamp (400).

6. The high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials according to claim 5, characterized in that, The torsion mechanism (300) has multiple clamps (400). The torsion motor (310) and crank-slider assembly (320) of the torsion mechanism (300) are a group. The number of racks (330), gears (340), shafts (350), bushings (360) and clamping rods (370) of the torsion mechanism (300) are the same as the number of clamps (400) on the torsion mechanism (300) and are multiple groups that correspond one-to-one. The slider of the crank-slider assembly (320) is connected to each group of racks (330) through a linkage transmission component.

7. The high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials according to claim 6, characterized in that, The linkage transmission assembly is located at the center of the multiple clamps (400) corresponding to the torsion mechanism (300).

8. The high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials according to claim 1, characterized in that, The clamp (400) includes an operating rod, a connecting rod, a pair of clamping plates, and a connecting frame. The pair of clamping plates are movably mounted on the connecting rod, forming a clamping position between the pair of clamping plates. The two ends of the connecting rod are locked into the connecting frame by nuts. The end of the operating rod is threaded and threaded to both sides of the connecting frame. The clamping degree of the pair of clamping plates is achieved by adjusting the depth to which the operating rod is screwed into the connecting frame.

9. The high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials according to claim 1, characterized in that, The frame (100) includes an upper frame and a lower frame. The power equipment of the tensioning mechanism (200) and the torsion mechanism (300) are both located on the lower frame, and the movable ends of the tensioning mechanism (200) and the torsion mechanism (300) are both located on the upper frame.

10. The high-temperature tensile and torsional fatigue comprehensive testing machine for rubber materials according to claim 9, characterized in that, The power equipment of the stretching mechanism (200) and the torsion mechanism (300) is installed horizontally, and the power equipment of the stretching mechanism (200) and the torsion mechanism (300) are respectively connected to the moving ends of the stretching mechanism (200) and the torsion mechanism (300) through bevel gear sets.

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