Rubber strip deformation testing device

Abstract

This utility model relates to the technical field of material mechanical property testing equipment, specifically a test device for simultaneous continuous traction and controllable deformation testing of rubber strip products; a rubber strip deformation test device includes a base; at least two upright plates erected on the base; a cover plate connecting the top of the upright plates to form a frame structure; a traction assembly including a shaft horizontally placed between the upright plates, a motor driving the shaft to rotate, and at least two bevel gears installed in the middle of the shaft for engaging the traction of the rubber strip, with a rubber strip traction channel formed between the two bevel gears; a pressure strip assembly including a support block that can be lifted and lowered below the cover plate, a pressure roller installed inside the support block, and a spring providing preload to the pressure roller; and a liftable support plate symmetrically arranged on both sides of the upright plates and located below the traction channel; wherein, the lowest point of the pressure roller is lower than the highest point of the support plate, the traction channel cooperates with the support plate to achieve continuous traction of the rubber strip, and the pressure roller cooperates with the support plate to achieve vertical pressure deformation testing of the rubber strip.

Description

Technical Field

[0001] This utility model relates to the technical field of material mechanical property testing equipment, specifically a test device for simultaneous testing of continuous traction and controllable deformation of rubber strip products. Background Technology

[0002] In the production quality control of strip-shaped elastomer products such as rubber sealing strips and conveyor belts, it is necessary to test their deformation recovery performance under continuous traction. Existing technologies mainly have the following shortcomings:

[0003] 1. Separation of traction and deformation testing: Traditional equipment requires stretching the rubber strip through a traction mechanism first, and then moving it into a pressure testing machine to test the deformation separately. The testing process is discontinuous and cannot simulate the real-time deformation behavior of the rubber strip under dynamic traction conditions.

[0004] 2. Insufficient pressure control accuracy: Devices that use cylinders or counterweights to apply pressure suffer from large pressure fluctuations and slow response, making it impossible to achieve continuous constant pressure with an accuracy of ±1N, resulting in high dispersion of deformation test data.

[0005] 3. Poor structural compatibility: The distance between the tray and the pressure roller of the existing pressure roller test device is fixed, which cannot be adapted to rubber strips of different thicknesses. When changing test specifications, the entire module needs to be disassembled and reassembled, which is inefficient.

[0006] The aforementioned defects prevent the test results from accurately reflecting the mechanical properties of the rubber strip under complex working conditions. Utility Model Content

[0007] To overcome the problems of asynchronous dynamic traction and deformation testing of rubber strips, low pressure control accuracy, and poor structural compatibility, this utility model provides a rubber strip deformation testing device. Through the coordination of bevel gear traction channel, spring pre-compression roller, and liftable extension plate, it realizes the synchronous testing of continuous traction and vertical pressure deformation of rubber strips, and is compatible with the rapid replacement of rubber strips with thicknesses of 3-15mm.

[0008] The technical solution adopted by this utility model to solve its technical problem is as follows: a rubber strip deformation testing device, including a base; at least two upright plates erected on the base; a cover plate connecting the top of the upright plates to form a frame structure; a traction assembly including a shaft horizontally placed between the upright plates, a motor driving the shaft to rotate, and at least two bevel gears installed in the middle of the shaft for engaging and traction of the rubber strip, with a rubber strip traction channel formed between the two bevel gears; a pressure strip assembly including a support block that can be lifted and lowered below the cover plate, a pressure roller installed inside the support block, and a spring providing preload to the pressure roller; and a liftable support plate symmetrically arranged on both sides of the upright plates and located below the traction channel; wherein, the lowest point of the pressure roller is lower than the highest point of the support plate, the traction channel cooperates with the support plate to achieve continuous traction of the rubber strip, and the pressure roller cooperates with the support plate to achieve vertical pressure deformation testing of the rubber strip.

[0009] The aforementioned rubber strip deformation testing device has a base fixed by expansion bolts, an upright plate welded to the upper surface of the base, a cover plate rigidly connected to the upright plate by bolts, and an anti-loosening thread adhesive applied to the connection surface.

[0010] In the aforementioned rubber strip deformation testing device, the two ends of the shaft are supported by bearing seats and the coaxiality error does not exceed 0.02 mm. The motor drives the shaft through a flexible coupling, and the motor speed is adjusted by a programmable controller.

[0011] In the aforementioned rubber strip deformation testing device, the support block is slidably connected to the cover plate via a guide rod, a spring is sleeved on the outside of the guide rod to provide preload, and the surface of the guide rod is plated with hard chrome.

[0012] In the aforementioned rubber strip deformation testing device, the support plate and the support block are respectively provided with liftable extension plates with arc-shaped grooves. The extension plates are triangular stainless steel plates at a 45-degree angle to the horizontal plane.

[0013] In the aforementioned rubber strip deformation test device, the highest point of the extension plate of the support plate is 2 mm lower than the lowest point of the traction channel, and the lowest point of the pressure roller is 1 mm lower than the lowest point of the extension plate of the support plate.

[0014] The aforementioned rubber strip deformation testing device includes a pressure strip assembly comprising a force sensor for real-time monitoring of the pressure roller pressure.

[0015] In the aforementioned rubber strip deformation testing device, the bevel gear has a module of 2 and a number of teeth of 20, the distance between the two bevel gears is 50 mm, and the lowest point of the traction channel is 12 mm away from the center line of the shaft.

[0016] The aforementioned rubber strip deformation testing device has a guide rod diameter of 12 mm, a spring outer diameter of 8 mm, a free length of 50 mm, and a stiffness coefficient of 5 N per millimeter.

[0017] The beneficial effects of this utility model are:

[0018] 1. Through the synergistic effect of the bevel gear traction channel and the pressure roller / support plate pressurization structure, the continuous traction-pressurization deformation synchronous test of the rubber strip is realized, which truly simulates the dynamic working condition;

[0019] 2. The spring preload, in conjunction with the force sensor, ensures that the pressure roller's pressure application accuracy reaches ±1N, guaranteeing consistent deformation detection.

[0020] 3. The adjustable extension plate and pressure plate provide a vertical adjustment range of ±20mm, which is suitable for testing of 3-15mm thick rubber strips and improves replacement efficiency by 80%. Attached Figure Description

[0021] The present invention will be further described below with reference to the embodiments and examples.

[0022] Figure 1This is a schematic diagram of the overall structure of an embodiment.

[0023] Figure 2 This is a schematic diagram of the traction assembly.

[0024] Figure 3 This is a schematic diagram of the pressure strip assembly.

[0025] In the diagram: 1. Base; 2. Vertical plate; 3. Cover plate; 4. Traction assembly; 41. Motor; 42. Shaft; 43. Bevel gear; 44. Support plate; 5. Pressure bar assembly; 51. Support block; 52. Guide rod; 53. Spring; 54. Pressure roller; 55. Pressure plate. Detailed Implementation

[0026] The adhesive strip deformation testing device in this embodiment achieves continuous traction and controllable deformation testing of the adhesive strip through the coordinated action of the traction component 4 and the pressure strip component 5. The assembly relationship and working process of each component are described in detail below with reference to the accompanying drawings. Figure 1-3 As shown, the test device includes a base 1, upright plates 2, cover plates 3, traction components 4, and pressure strip components 5. The base 1 is horizontally arranged and has four M8 bolt holes around its perimeter. It is fixed to the ground or workbench by expansion bolts. Two upright plates 2 are welded at intervals along the length of the upper surface of the base 1, with a spacing of 300mm between the upright plates 2. The top of the upright plates 2 is rigidly connected to the cover plate 3 by M6 bolts to form a frame structure. The connection surfaces of the upright plates 2 with the base 1 and the cover plate 3 are coated with anti-loosening thread adhesive to ensure the connection stability under vibration conditions.

[0027] The traction assembly 4 includes a motor 41, a shaft 42, a bevel gear 43, and a support plate 44. The shaft 42 (20mm diameter, 45# steel, heat-treated) is horizontally positioned between the vertical plates 2. It is fixed on the left side by a UCP205 bearing seat, and on the right side by a UC205 seated bearing. The coaxiality of both ends of the shaft 42 is calibrated using a dial indicator, with the error controlled within 0.02mm. The motor 41 (model 57BYGH50-401A, rated torque 1.2N·m) is bolted to the right vertical plate 2 through surrounding screw holes. The shaft of the motor 41 is connected to the shaft 42 via a flexible coupling. The speed of the motor 41 is adjusted by a PLC controller, ranging from 0- At 300 rpm, two bevel gears 43 (module 2, number of teeth 20) are symmetrically installed in the middle of the shaft 42, with a distance of 50 mm between the two gears, forming a rubber strip traction channel. The lowest point of the channel is 12 mm away from the center line of the shaft 42, ensuring that the rubber strip (section size 10 mm × 5 mm) can pass smoothly. Liftable support plates 44 are installed on both sides of the upright plate 2. The support plates 44 are connected to the upright plate 2 by M5 bolts. The arc-shaped groove (radius 10 mm) allows for a vertical adjustment range of ±15 mm. The triangular extension plate (304 stainless steel, thickness 2 mm) forms a 45° angle with the horizontal plane, and its highest point is 2 mm lower than the lowest point of the traction channel, forming an interference-free support surface.

[0028] The pressure strip assembly 5 includes a support block 51, a guide rod 52, a spring 53, a pressure roller 54, and a pressure plate 55. The support block 51 (n-shaped structure, 80mm high) is slidably connected to the cover plate 3 via a Φ12mm guide rod 52. The guide rod 52 has a hard chrome plated surface (0.03mm thick). The spring 53 (Φ8×50mm, stiffness coefficient 5N / mm) is sleeved on the outside of the guide rod 52 to provide initial preload. The pressure roller 54 (outer diameter 50mm, rubber coating hardness 60±5Shore)... A) The support block 51 is installed inside the support block 51 via a UCF205 bearing seat. Its lowest point is 1mm lower than the lowest point of the extension plate to ensure continuous pressure on the rubber strip. The pressure value is monitored in real time by a force sensor (range 0-50N, not shown in the figure). The support block 51 is equipped with liftable pressure plates 55 on both sides. Its structure is the same as that of the support plate 44. The triangular extension plate (size as above) and the pressure roller 54 form a double anti-winding structure. The vertical adjustment range of the pressure plate 55 is ±20mm to adapt to the testing requirements of rubber strips of different thicknesses.

[0029] Working process: The end of the rubber strip is passed through the traction channel and placed on the extension plate of the support plate 44. The motor 41 is started and runs at low speed (50 rpm) to make the rubber strip initially mesh with the bevel gear 43. Then, the spring 53 drives the pressure roller 54 to press the rubber strip with a pressure of 15N. At this time, the rubber strip is simultaneously subjected to the frictional traction force of the bevel gear 43 (F=μN, μ is 0.3) and the vertical deformation pressure. The compression of the rubber strip under the action of the pressure roller 54 is measured by a laser displacement sensor (accuracy 0.001mm, not shown in the figure). The torque and speed data of the motor 41 are recorded simultaneously. The stress-strain relationship of the rubber strip is analyzed. After running continuously for 2 hours, the deformation recovery of the rubber strip surface is checked to confirm that the rubber strip meets the production standards.

Claims

1. A gum strip deformation test apparatus, characterized by: include Base; At least two upright plates erected on the base; The cover plate at the top of the vertical panel forms a frame structure; The traction assembly includes a shaft horizontally placed between the upright plates, a motor that drives the shaft to rotate, and at least two bevel gears installed in the middle of the shaft for engaging the traction strip, with a traction channel for the strip formed between the two bevel gears; The pressure strip assembly includes a support block that can be lifted and lowered below the cover plate, a pressure roller installed inside the support block, and a spring that provides preload to the pressure roller; The liftable pallets are symmetrically arranged on both sides of the upright plate and located below the traction channel; The lowest point of the pressure roller is lower than the highest point of the support plate. The traction channel works with the support plate to achieve continuous traction of the rubber strip. The pressure roller works with the support plate to achieve vertical pressure deformation testing of the rubber strip.

2. The strip test device of claim 1, wherein: The base is fixed by expansion bolts, the upright plate is welded to the upper surface of the base, and the cover plate is rigidly connected to the upright plate by bolts, with the connecting surface coated with anti-loosening thread adhesive.

3. The strip test device of claim 1, wherein: The shaft is supported at both ends by bearing seats with a coaxiality error of no more than 0.02 mm. The motor drives the shaft through a flexible coupling, and the motor speed is adjusted by a programmable controller.

4. The strip test device of claim 1, wherein: The support block is slidably connected to the cover plate via a guide rod, and a spring is sleeved on the outside of the guide rod to provide preload. The surface of the guide rod is plated with hard chrome.

5. The strip test device of claim 1, wherein: The support plate and the support block are respectively provided with liftable extension plates with arc-shaped grooves. The extension plates are triangular stainless steel plates at a 45-degree angle to the horizontal plane.

6. The strip test device of claim 5, wherein: The highest point of the pallet extension is 2 mm lower than the lowest point of the traction channel, and the lowest point of the pressure roller is 1 mm lower than the lowest point of the pallet extension.

7. The strip test device of claim 1, wherein: The pressure bar assembly includes a force sensor that monitors the pressure of the pressure roller in real time.

8. The strip test device of claim 1, wherein: The bevel gear has a module of 2 and 20 teeth, the distance between the two bevel gears is 50 mm, and the lowest point of the traction channel is 12 mm from the center line of the shaft.

9. The adhesive strip deformation testing device according to claim 4, characterized in that: The guide rod has a diameter of 12 mm, the spring has an outer diameter of 8 mm, a free length of 50 mm, and a stiffness coefficient of 5 Newtons per millimeter.

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