A mechanism for testing the fracture toughness of a plastic article
The fracture toughness testing mechanism for plastic products, designed with multiple components in synergy, solves the problems of unstable fixation and incomplete observation, and achieves high-precision and reliable test results.
Patent Information
- Application Number
- CN202510394740.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2045-03-31
AI Technical Summary
Existing testing facilities for fracture toughness of plastic products suffer from problems such as unstable fixation and incomplete observation, resulting in poor accuracy and consistency of test results.
It adopts a multi-component collaborative design, including a pressure application component, a clamping component, an observation component, and a drive component. Through the linkage of the transmission and rotation components, it achieves stable clamping, uniform loading, and full-process observation of plastic products.
It significantly improves test accuracy and the reliability of results, ensures uniform load application, enables dynamic observation and clear visibility throughout the process, reduces operational difficulty, and improves test efficiency.
Smart Images
Figure CN120253442B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of plastic fracture toughness testing, in particular to a plastic product fracture toughness testing mechanism. BACKGROUND
[0002] As an important material in modern industry and daily life, plastic products are widely used in various fields. Since plastic materials are often subjected to external impact, stretching or bending during use, their fracture toughness (i.e. the ability of the material to resist fracture under load) is an important indicator of the quality and performance of plastic products. In order to ensure the safety and service life of plastic products, their fracture toughness must be accurately tested and evaluated. In the prior art, the main problems of the plastic product fracture toughness testing mechanism are as follows:
[0003] During the fracture toughness testing of plastic products, there are often problems of unstable fixation and incomplete observation. Since most existing clamping devices use rigid clamping structures, it is easy to cause uneven stress on the plastic product during clamping, and the sample may be damaged during testing, affecting the accuracy and consistency of the test results. In addition, the observation position of the plastic product during testing is fixed and cannot be dynamically adjusted according to changes in the testing environment, resulting in observation blind spots during testing and incomplete recording of the fracture deformation results of the sample.
[0004] Therefore, we propose a plastic product fracture toughness testing mechanism. SUMMARY
[0005] In order to overcome the shortcomings of the prior art, the present application provides a plastic product fracture toughness testing mechanism, which significantly improves the testing accuracy, operation convenience and reliability of the test results through efficient cooperation and precise control between the components.
[0006] To solve the above technical problems, the present application provides the following technical solutions:
[0007] A plastic product fracture toughness testing mechanism, comprising a base assembly for placing plastic products, a pressure applying assembly for applying fracture pressure to the plastic products is arranged on one side above the base assembly, an observation assembly for observing the plastic products is arranged on the other side above the base assembly, and an illumination assembly is arranged on the top of the base assembly.
[0008] A first clamping assembly for fixing the plastic products is arranged on the base assembly, and a second clamping assembly for secondary fixing the plastic products is arranged on the first clamping assembly.
[0009] The base assembly is provided with a transmission assembly for synchronously driving the first clamping assembly and the second clamping assembly, the transmission assembly comprising an outer cylinder, an inner ring and a first gear ring; the base assembly is provided with a rotating assembly for driving the lighting assembly to rotate around, the rotating assembly comprising a bottom cylinder and a second gear ring;
[0010] The bottom of the base assembly is provided with a driving assembly for driving the linear motion thereof, the driving assembly being used to drive the transmission assembly and the rotating assembly respectively.
[0011] As a preferred scheme of the plastic product fracture toughness testing mechanism, the base assembly comprises a bottom plate, a supporting table, a backing plate and a pressure sensor, the supporting table is located at the center of the top surface of the bottom plate, the backing plate is connected between the two side bottom surfaces of the supporting table and the top surface of the bottom plate, and the pressure sensor is embedded in the top surface of the backing plate.
[0012] As a preferred scheme of the plastic product fracture toughness testing mechanism, the pressure applying assembly comprises a fixed plate, a supporting frame and a telescopic cylinder, the bottom plate is located above the top surface of the fixed plate, the supporting frame is connected to the top of the fixed plate and covers the top surface of the supporting table, and the telescopic cylinder is installed on the top of the supporting frame.
[0013] As a preferred scheme of the plastic product fracture toughness testing mechanism, the observation assembly comprises a camera, the camera is installed on the top of the supporting frame, and the camera and the telescopic cylinder are separately arranged on the two sides of the top of the supporting frame.
[0014] As a preferred scheme of the plastic product fracture toughness testing mechanism, the first clamping assembly comprises an elastic plate, a clamping plate and a pressing plate, square holes are equidistantly formed in the side wall of the supporting table along the outer circumferential surface, the square holes extend to the inner bottom surface of the supporting table, the elastic plate is located inside the square hole and is fixed between the top of the elastic plate and the inner top surface of the square hole, the clamping plate is connected to the inner side top of the elastic plate, the clamping plate is arranged obliquely and the lower end of the clamping plate is located inside the supporting table, the pressing plate is connected to the outer side bottom of the elastic plate, and the pressing plate is arranged obliquely and the upper end of the pressing plate is located outside the supporting table.
[0015] As a preferred scheme of the plastic product fracture toughness testing mechanism, the second clamping assembly comprises an air cushion and an air bag, the air cushion is arranged on the inner side surface of the elastic plate and is covered by the clamping plate, the surface of the clamping plate is provided with a through hole for the air cushion to penetrate, the air bag is arranged on the outer side surface of the elastic plate and is covered by the pressing plate, and the elastic plate is provided with an air hole for the internal communication between the air bag and the air cushion.
[0016] As a preferred plastic product fracture toughness test mechanism of the application, wherein: the inner ring is sleeved on the outer circumferential surface of the support table and is connected slidingly up and down between each other, the outer cylinder is rotationally arranged on the top surface of the bottom plate and coaxially sleeves the support table, the inner circumferential surface of the outer cylinder is threadedly engaged with the outer circumferential surface of the inner ring, the first gear ring is coaxially connected to the inner side wall of the lower end of the outer cylinder, and the first gear ring is located below the inner ring.
[0017] As a preferred plastic product fracture toughness test mechanism of the application, wherein: the lighting assembly comprises a lifting lamp holder and a light supplementing lamp, the lifting lamp holder is circularly arrayed on the top surface of the bottom cylinder, the light supplementing lamp is connected to the top of the lifting lamp holder and faces the support table, the bottom cylinder is rotationally arranged on the outer circumferential surface of the bottom plate, the second gear ring is coaxially connected to the inner side wall of the lower end of the bottom cylinder, and the second gear ring is located below the bottom surface of the bottom plate.
[0018] As a preferred plastic product fracture toughness test mechanism of the application, wherein: the driving assembly comprises a lead screw, a positioning rod, a connecting sleeve, a guide cylinder and a worm, the positioning rod has two and is parallelly arranged on both sides of the lead screw, the lead screw and the positioning rod are both rotationally arranged between the bottom end of the support frame on both sides, the ends of the lead screw and the positioning rod both extend to the outside of the support frame and are connected with hand wheels, the connecting sleeve and the guide cylinder are both fixedly connected to the bottom surface of the bottom plate, the connecting sleeve is threadedly sleeved on the outer surface of the lead screw, the inside of the worm is hollow and is slidingly sleeved on the outer surface of the positioning rod, the inner circumferential surface of the worm is circumferentially engaged with the outer circumferential surface of the positioning rod, the guide cylinder is located at both ends of the worm and is movably sleeved on the outer surface of the positioning rod, and the guide cylinder is fixedly connected with the connecting sleeve.
[0019] As a preferred plastic product fracture toughness test mechanism of the application, wherein: the driving assembly further comprises two groups of gear sets, the gear sets are rotationally arranged on the bottom plate, one group of the gear sets is drivingly connected between one side worm and the first gear ring, and the other group of the gear sets is drivingly connected between the other side worm and the second gear ring.
[0020] Compared with the prior art, the application has the following beneficial effects:
[0021] Through the reasonable configuration and efficient linkage of each component, the test precision, operation convenience and reliability of the test results are significantly improved, and the deficiencies of the traditional fracture toughness test device in precision, stability, synchronous control and observation recording are successfully solved;
[0022] The cooperation design of the pressure applying assembly and the pressure sensor can apply constant and accurate fracture load to the plastic product, the load can be dynamically adjusted through the real-time feedback of the pressure sensor, the load can be uniformly applied, and the precision and consistency of the test are significantly improved;
[0023] The double clamping design of the first clamping assembly and the second clamping assembly utilizes the first clamping assembly to provide preliminary elastic support, the second clamping assembly realizes flexible clamping through the air cushion, and finally the transmission assembly controls the synchronous action of the clamping assembly to ensure the stability of the plastic product fixation;
[0024] The observation assembly is used in cooperation with the lighting assembly, can comprehensively observe the plastic product under different light angles, and through the flexible adjustment of the rotating assembly, the lighting assembly can change the position following the test environment, realizes dynamic adjustment, and ensures the whole process clear and visible in the test process;
[0025] The linkage design of the driving assembly, the transmission assembly and the rotating assembly makes the device realize synchronous control, reduces the operation difficulty, the precise cooperation of the gear set and the worm structure makes the rotating, clamping and loading actions of the device more stable and accurate, and improves the test efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 It is a structural schematic diagram of a plastic product fracture toughness test mechanism.
[0027] Figure 2 It is a support frame schematic diagram of a plastic product fracture toughness test mechanism.
[0028] Figure 3 It is a bottom cylinder schematic diagram of a plastic product fracture toughness test mechanism.
[0029] Figure 4 It is a supporting table schematic diagram of a plastic product fracture toughness test mechanism.
[0030] Figure 5 It is a bottom plate schematic diagram of a plastic product fracture toughness test mechanism.
[0031] Figure 6 It is an inner ring schematic diagram of a plastic product fracture toughness test mechanism.
[0032] Figure 7 It is an elastic plate schematic diagram of a plastic product fracture toughness test mechanism.
[0033] Figure 8 It is a worm schematic diagram of a plastic product fracture toughness test mechanism.
[0034] Wherein: 1, fixed plate; 2, support frame; 3, telescopic cylinder; 4, camera; 5, outer cylinder; 6, bottom cylinder; 7, screw rod; 8, second ring gear; 9, positioning rod; 10, hand wheel; 11, connecting sleeve; 12, worm; 13, gear set; 14, lifting lamp holder; 15, light supplementing lamp; 16, supporting table; 17, clamping plate; 18, through hole; 19, first ring gear; 20, inner ring; 21, pressing plate; 22, air bag; 23, backing plate; 24, pressure sensor; 25, bottom plate; 26, elastic plate; 27, square hole; 28, air cushion; 29, air hole; 30, guide cylinder. DETAILED DESCRIPTION
[0035] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0036] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the concept of the present application, therefore the present application is not limited to the specific embodiments disclosed below.
[0037] Secondly, "one embodiment" or "embodiment" referred to herein means that specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is separate or alternative to other embodiments.
[0038] Embodiment
[0039] Please refer to Figures 1 to 8 The present application provides a kind of plastic product fracture toughness test mechanism, including the base station component for placing plastic product, base station component includes bottom plate 25, supporting table 16, backing plate 23 and pressure sensor 24, supporting table 16 is located at the top surface center of bottom plate 25, backing plate 23 is connected between the bottom surface of the two sides of supporting table 16 and the top surface of bottom plate 25, pressure sensor 24 is embedded in the top surface of backing plate 23, the upper side of base station component is provided with the pressure applying assembly for applying fracture pressure to plastic product, the upper side of base station component is provided with the observation assembly for viewing plastic product, the top of base station component is provided with illumination assembly;
[0040] The supporting table 16 serves as a sample bearing platform to ensure the stability of the sample position during the test. The base plate 23 connects the supporting table 16 and the bottom plate 25 to enhance the stability of the overall structure. The pressure sensor 24 is embedded in the top surface of the base plate 23 to monitor the load applied to the sample in real time and ensure that the applied load is accurately controllable. The telescopic cylinder 3 is supported by the fixed plate 1 and the support frame 2 and can accurately apply pressure in the vertical direction. Under the feedback action of the pressure sensor 24, the pressure can be controlled to ensure stable and consistent test conditions.
[0041] The pressure applying assembly includes the fixed plate 1, the support frame 2, and the telescopic cylinder 3. The bottom plate 25 is located above the top surface of the fixed plate 1. The support frame 2 is connected to the top of the fixed plate 1 and covers the top surface of the supporting table 16. The telescopic cylinder 3 is installed on the top of the support frame 2. The observation assembly includes the camera 4, which is installed on the top of the support frame 2. The camera 4 and the telescopic cylinder 3 are separately located on both sides of the top of the support frame 2.
[0042] The camera 4 is installed on the top of the support frame 2, which is accurately positioned and can monitor the deformation and fracture of the sample in real time during the test. The camera 4 and the pressure applying assembly are not interfered with each other, ensuring a clear shooting angle. The lighting assembly realizes light compensation and visual enhancement. The fill light 15 is installed on the lifting lamp stand 14, and the illumination direction can be adjusted to ensure uniform light on the sample surface. The cooperation of the bottom cylinder 6 and the second gear ring 8 allows the light to rotate and change position to surround the lighting, avoiding the observation blind area caused by insufficient light.
[0043] The first clamping assembly for fixing the plastic product is arranged on the base assembly. The first clamping assembly includes the elastic plate 26, the clamping plate 17, and the pressing plate 21. The side wall of the supporting table 16 is equally spaced apart along the outer circumferential surface to form the square hole 27, which extends to the inner bottom surface of the supporting table 16. The elastic plate 26 is located inside the square hole 27, and the top of the elastic plate 26 is connected and fixed with the inner top surface of the square hole 27. The clamping plate 17 is connected to the inner side top of the elastic plate 26 and is arranged obliquely with the lower end inside the supporting table 16. The pressing plate 21 is connected to the outer side bottom of the elastic plate 26 and is arranged obliquely with the upper end outside the supporting table 16.
[0044] The second clamping assembly for secondary fixing the plastic product is arranged on the first clamping assembly. The second clamping assembly includes the air cushion 28 and the air bag 22. The air cushion 28 is arranged on the inner side surface of the elastic plate 26 and is covered by the clamping plate 17. The surface of the clamping plate 17 is provided with the through hole 18 for the air cushion 28 to penetrate. The air bag 22 is arranged on the outer side surface of the elastic plate 26 and is covered by the pressing plate 21. The elastic plate 26 is provided with the air hole 29 for internal communication between the air bag 22 and the air cushion 28.
[0045] The first clamping assembly and the second clamping assembly are double clamped, the elastic plate 26, the clamping plate 17 and the pressing plate 21 of the first clamping assembly are matched to provide primary elastic fixing effect, and accurate positioning of the sample is ensured, the second clamping assembly realizes flexible wrapping and fixing of the sample through the combined action of the air cushion 28 and the air bag 22, and sliding or loosening of the sample in the test process is prevented to prevent inaccurate test results caused by the sliding or loosening of the sample; the outer cylinder 5 and the inner ring 20 are screwed to realize synchronous driving, ensure synchronous movement of the first clamping assembly and the second clamping assembly, and keep uniform stress;
[0046] The base assembly is provided with a transmission assembly for synchronously driving the first clamping assembly and the second clamping assembly, the transmission assembly comprises the outer cylinder 5, the inner ring 20 and the first gear ring 19, the inner ring 20 is sleeved on the outer circumferential surface of the supporting table 16 and is connected in sliding mode, the outer cylinder 5 is rotationally arranged on the top surface of the bottom plate 25 and coaxially sleeves the supporting table 16, the inner circumferential surface of the outer cylinder 5 is screwed with the outer circumferential surface of the inner ring 20, and the first gear ring 19 is coaxially connected to the inner side wall of the lower end of the outer cylinder 5 and is located below the inner ring 20;
[0047] The base assembly is provided with a rotating assembly for driving the lighting assembly to rotate around, the rotating assembly comprises the bottom cylinder 6 and the second gear ring 8, the lighting assembly comprises the lifting lamp stand 14 and the supplementary light 15, the lifting lamp stand 14 is arranged in an annular array on the top surface of the bottom cylinder 6, the supplementary light 15 is connected to the top of the lifting lamp stand 14 and faces the supporting table 16, the bottom cylinder 6 is rotationally arranged on the outer circumferential surface of the bottom plate 25, and the second gear ring 8 is coaxially connected to the inner side wall of the lower end of the bottom cylinder 6 and is located below the bottom surface of the bottom plate 25;
[0048] The bottom of the base assembly is provided with a driving assembly for driving linear movement, the transmission assembly and the rotating assembly are respectively driven through the driving assembly, the driving assembly comprises the lead screw 7, the positioning rod 9, the connecting sleeve 11, the guide cylinder 30 and the worm 12, the positioning rod 9 has two rods and is arranged in parallel on the two sides of the lead screw 7, the lead screw 7 and the positioning rod 9 are rotationally arranged between the two sides of the bottom end of the support frame 2, the ends of the lead screw 7 and the positioning rod 9 extend to the outside of the support frame 2 and are connected with the hand wheel 10, the connecting sleeve 11 and the guide cylinder 30 are both connected and fixed to the bottom surface of the bottom plate 25, the connecting sleeve 11 is screwed on the outer surface of the lead screw 7, the worm 12 is hollow in the inside and is slidably sleeved on the outer surface of the positioning rod 9, the inner circumferential surface of the worm 12 is circumferentially engaged with the outer circumferential surface of the positioning rod 9, the guide cylinder 30 is located at the two ends of the worm 12 and is movably sleeved on the outer surface of the positioning rod 9, and the guide cylinder 30 is connected and fixed between the connecting sleeve 11, the driving assembly further comprises two sets of gear sets 13, the gear sets 13 are rotationally arranged on the bottom plate 25, one set of gear sets 13 is transmissionally connected between one side of the worm 12 and the first gear ring 19, and the other set of gear sets 13 is transmissionally connected between the other side of the worm 12 and the second gear ring 8;
[0049] The driving assembly drives the first clamping assembly, the second clamping assembly, the transmission assembly and the rotating assembly through the linkage of the lead screw 7 and the positioning rod 9.
[0050] It should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.
Claims
1. A plastic article fracture toughness testing mechanism comprising a base assembly for placing a plastic article, characterized by: The upper side of the base assembly is provided with a pressure applying assembly for applying breaking pressure to the plastic product, the other upper side of the base assembly is provided with an observation assembly for observing the plastic product, and the top of the base assembly is provided with an illumination assembly; The pressure applying assembly comprises a fixed plate, a support frame and a telescopic cylinder; The base assembly is provided with a first clamping assembly for fixing the plastic product, and the first clamping assembly is provided with a second clamping assembly for secondarily fixing the plastic product; The base assembly comprises a bottom plate, a supporting table, a cushion plate and a pressure sensor; The first clamping assembly comprises an elastic plate, a clamping plate and a pressing plate, the side wall of the supporting table is provided with square holes equidistantly along the outer circumferential surface, the square holes extend to the inner bottom surface of the supporting table, the elastic plate is located inside the square hole and is fixed between the top of the elastic plate and the inner top surface of the square hole, the clamping plate is connected to the inner top of the elastic plate, the clamping plate is arranged obliquely and the lower end is located inside the supporting table, the pressing plate is connected to the outer bottom of the elastic plate, and the pressing plate is arranged obliquely and the upper end is located outside the supporting table; The second clamping assembly comprises an air cushion and an air bag, the air cushion is arranged on the inner side of the elastic plate and is covered by the clamping plate, the surface of the clamping plate is provided with a through hole for the air cushion to penetrate, and the air bag is arranged on the outer side of the elastic plate and is covered by the pressing plate, the elastic plate is provided with an air hole for internal communication between the air bag and the air cushion; The base assembly is provided with a transmission assembly for synchronously driving the first clamping assembly and the second clamping assembly, the transmission assembly comprises an outer cylinder, an inner ring and a first gear ring, the base assembly is provided with a rotating assembly for driving the illumination assembly to rotate around, and the rotating assembly comprises a bottom cylinder and a second gear ring; The inner ring is sleeved on the outer circumferential surface of the supporting table and is connected in sliding relationship between each other, the outer cylinder is rotatably arranged on the top surface of the bottom plate and coaxially sleeves the supporting table, the inner circumferential surface of the outer cylinder is threadedly engaged with the outer circumferential surface of the inner ring, the first gear ring is coaxially connected to the inner side wall of the lower end of the outer cylinder, and the first gear ring is located below the inner ring; The bottom of the base assembly is provided with a driving assembly for driving the linear motion thereof, the transmission assembly and the rotating assembly are respectively driven through the driving assembly; The driving assembly comprises a lead screw, a positioning rod, a connecting sleeve, a guide cylinder and a worm, the positioning rod has two roots and is distributed in parallel on both sides of the lead screw, the lead screw and the positioning rod are rotatably arranged between the bottom ends of both sides of the support frame, the ends of the lead screw and the positioning rod extend to the outside of the support frame and are connected with hand wheels, the connecting sleeve and the guide cylinder are fixedly connected to the bottom surface of the bottom plate, the connecting sleeve is threadedly sleeved on the outer surface of the lead screw, the inside of the worm is hollow and is sleeved on the outer surface of the positioning rod in sliding relationship, the inner circumferential surface of the worm is circumferentially engaged with the outer circumferential surface of the positioning rod, the guide cylinder is located at both ends of the worm and is movably sleeved on the outer surface of the positioning rod, and the guide cylinder is fixedly connected with the connecting sleeve.
2. The apparatus of claim 1, wherein: The supporting table is located at the center of the top surface of the bottom plate, the cushion plate is connected between the bottom surfaces of both sides of the supporting table and the top surface of the bottom plate, and the pressure sensor is embedded in the top surface of the cushion plate.
3. The apparatus of claim 1, wherein: The bottom plate is above the top surface of the fixed plate, the support frame is connected to the top of the fixed plate and covers the top surface of the supporting table, and the telescopic cylinder is installed on the top of the support frame.
4. The apparatus of claim 1, wherein: The observation assembly comprises a camera, which is installed on the top of the support frame and is separately arranged on both sides of the top of the support frame from the telescopic cylinder.
5. The apparatus of claim 1, wherein: The lighting assembly comprises a lifting lamp holder and a light supplement lamp, the lifting lamp holder is arranged in a circular array on the top surface of the bottom cylinder, the light supplement lamp is connected to the top of the lifting lamp holder and faces the supporting table, the bottom cylinder is rotationally arranged on the outer circumferential surface of the bottom plate, the second gear ring is coaxially connected to the inner side wall of the lower end of the bottom cylinder, and the second gear ring is below the bottom surface of the bottom plate.
6. The apparatus of claim 1, wherein: The driving assembly further comprises two groups of gear sets, which are rotationally arranged on the bottom plate, one group of the gear sets is drivingly connected between one side of the worm and the first gear ring, and the other group of the gear sets is drivingly connected between the other side of the worm and the second gear ring.
Citation Information
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