A stress test tool

Abstract

An embodiment of the utility model provides a stress test fixture, which relates to the field of stress aging inspection of plastic test strips. The stress test fixture includes a first bracket, a second bracket and a force-applying device, wherein the first bracket is provided with a first placement groove; the second bracket is spaced apart from the first bracket and parallel to each other; the second bracket is provided with a second placement groove, and the second placement groove is arranged opposite to the first placement groove; the first placement groove and the second placement groove are used together to place a plurality of plastic test strips. The force-applying device includes a moving component and a pressure strip, wherein the moving component is connected to the pressure strip, and the moving component is arranged between the first bracket and the second bracket; the moving component can drive the pressure strip to move up and down, so that the pressure strip squeezes or moves away from a plurality of plastic test strips. The placement groove can place a plurality of plastic test strips at the same time, therefore, the force-applying device can perform stress tests on a plurality of plastic test strips at the same time, simulating the aging test of the plastic test strips under different stress conditions, thereby improving the accuracy of the test.

Description

Technical Field

[0001] The utility model relates to the field of stress aging inspection of plastic test strips, in particular to a stress test tooling. Background Art

[0002] Plastics have good chemical properties, mechanical properties, electrical properties and dimensional stability. However, its biggest disadvantage is that it is not resistant to aging. There are two methods to test the aging resistance of plastics: natural aging test and artificial aging test. The natural aging test is to place the sample under natural conditions for testing, while the artificial aging test is to expose the material to specific environmental conditions to simulate the aging resistance of plastics under natural light, heat, oxygen, humidity, rain and other conditions. Both test methods require testing the stress performance of the plastic test strips before and after the test to evaluate their aging resistance.

[0003] However, the current stress test tooling can only test the stress performance of one plastic test strip at a time, and the test results are accidental. Utility Model Content

[0004] The utility model provides a stress test tool, which can perform stress aging tests on a plurality of plastic test strips at one time, can eliminate accidental situations, increase contrast, and improve the accuracy and authenticity of the test.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] The embodiment of the utility model provides a stress test tool, which includes:

[0007] A first bracket, wherein the first bracket is provided with a first placement groove;

[0008] a second bracket, the second bracket is spaced apart from the first bracket and parallel to each other; the second bracket is provided with a second placement groove, the second placement groove is arranged opposite to the first placement groove; the first placement groove and the second placement groove are used together to place a plurality of plastic test strips; and

[0009] A force-applying device, the force-applying device includes a moving component and a pressure strip, the moving component is connected to the pressure strip, and the moving component is arranged between the first bracket and the second bracket; the moving component can drive the pressure strip to move up and down so that the pressure strip squeezes or moves away from the plurality of plastic test strips.

[0010] In an optional embodiment, the length of the pressure strip is greater than or equal to the extension length of the first placement groove, and the length direction of the pressure strip is parallel to the extension direction of the first placement groove.

[0011] In an optional embodiment, the moving assembly includes a screw bracket and a screw, the screw is movably connected to the screw bracket, and the screw bracket is arranged between the first bracket and the second bracket; the screw is connected to the pressure strip; the screw can drive the pressure strip to move up and down so that the pressure strip is squeezed or moved away from the plastic test strip.

[0012] In an optional embodiment, the pressure strip is provided with a mounting through hole, the screw rod passes through the mounting through hole and is connected to the pressure strip, and the pressure strip is fixed to the screw rod by a nut.

[0013] In an optional implementation, the force testing fixture further includes a base plate, and the first bracket, the second bracket and the moving assembly are all connected to the base plate.

[0014] In an optional embodiment, the first bracket, the second bracket and the moving assembly are all detachably connected to the base plate.

[0015] In an optional embodiment, the first bracket is connected to the base plate by bolts, and / or the second bracket is connected to the base plate by bolts, and / or the moving assembly is connected to the base plate by bolts.

[0016] In an optional embodiment, the pressure strip includes a mounting surface, a first connecting surface, an extrusion surface, and a second connecting surface connected in sequence, the extrusion surface is parallel to the mounting surface, and the extrusion surface is used to extrude or move away from the plastic test strip.

[0017] In an optional embodiment, the first connecting surface includes a first rectangular surface and a first arc surface, the first rectangular surface is connected to the first arc surface, the first rectangular surface is connected to the mounting surface, and the first arc surface is connected to the extrusion surface;

[0018] The second connecting surface includes a second rectangular surface and a second arc surface, the second rectangular surface is connected to the second arc surface, the second rectangular surface is connected to the mounting surface, and the second arc surface is connected to the extrusion surface.

[0019] In an optional embodiment, the pressure strip is detachably connected to the moving component.

[0020] The beneficial effects of the force test tooling of the embodiment of the utility model include:

[0021] The stress test fixture includes a first bracket, a second bracket and a force-applying device. The first bracket is provided with a first placement groove; the second bracket is spaced apart from the first bracket and parallel to each other; the second bracket is provided with a second placement groove, and the second placement groove is arranged opposite to the first placement groove; the first placement groove and the second placement groove are used together to place multiple plastic test strips. The force-applying device includes a moving component and a pressure strip, the moving component is connected to the pressure strip, and the moving component is arranged between the first bracket and the second bracket; the moving component can drive the pressure strip to move up and down so that the pressure strip squeezes or moves away from multiple plastic test strips. Because the first placement groove and the second placement groove can place multiple plastic test strips at the same time, the force-applying device can perform stress tests on multiple plastic test strips at the same time, simulating aging tests of plastic test strips under different stress conditions. Multiple plastic test strips can be placed in the placement groove at one time, which can eliminate accidental situations, increase contrast, and improve the authenticity and accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of a stress test tool provided in an embodiment of the utility model;

[0024] Figure 2 It is a schematic diagram of a stress test tooling provided in an embodiment of the utility model in a non-working state;

[0025] Figure 3 A schematic diagram of the working state of the stress test tooling provided in the embodiment of the utility model;

[0026] Figure 4 It is a schematic diagram of a pressure strip provided in an embodiment of the utility model.

[0027] Icon: 1000-force test fixture; 100-first bracket; 110-first placement groove; 200-second bracket; 210-second placement groove; 300-force device; 310-moving component; 311-screw bracket; 312-screw; 320-pressure strip; 321-mounting through hole; 322-mounting surface; 323-first connecting surface; 3231-first rectangular surface; 3232-first arc surface; 324-extrusion surface; 325-second connecting surface; 3251-second rectangular surface; 3252-second arc surface; 400-bottom plate; 2000-plastic test strip. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0032] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0033] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0034] Plastics have good chemical properties, mechanical properties, electrical properties and dimensional stability. However, its biggest disadvantage is that it is not resistant to aging. There are two methods to test the aging resistance of plastics: natural aging test and artificial aging test. The natural aging test is to place the sample under natural conditions for testing, and the artificial aging test is to expose the material to specific environmental conditions to simulate the aging resistance of plastics under natural light, heat, oxygen, humidity, rain and other conditions. Both test methods require testing the stress performance of the plastic test strips before and after the test to evaluate their aging resistance. However, the current stress test tooling can only test the stress performance of one plastic test strip at a time, and the test results are accidental.

[0035] Based on this, please refer to Figure 1 , Figure 2 and Figure 3 The stress test fixture 1000 provided in the utility model can effectively solve the above-mentioned technical problems. The stress test fixture 1000 can perform stress aging tests on multiple plastic test strips 2000 at one time, which can eliminate accidental situations, increase comparison, and improve the accuracy and authenticity of the test.

[0036] Figure 1 A schematic diagram of a stress test fixture 1000 provided in an embodiment of the utility model; Figure 2 It is a schematic diagram of the stress test fixture 1000 provided in the embodiment of the utility model in a non-working state;

[0037] Figure 3 FIG. 1 is a schematic diagram of the working state of the stress test fixture 1000 provided in the embodiment of the utility model, as shown in FIG. Figure 1 , Figure 2 and Figure 3 As shown, the force test fixture 1000 includes a first bracket 100, a second bracket 200 and a force applying device 300. The first bracket 100 is provided with a first placement groove 110; the second bracket 200 is arranged at a distance from the first bracket 100 and is parallel to each other; the second bracket 200 is provided with a second placement groove 210, and the second placement groove 210 is arranged opposite to the first placement groove 110; the first placement groove 110 and the second placement groove 210 are used together to place a plurality of plastic test strips 2000. The force applying device 300 includes a moving component 310 and a pressure strip 320, the moving component 310 is connected to the pressure strip 320, and the moving component 310 is arranged between the first bracket 100 and the second bracket 200; the moving component 310 can drive the pressure strip 320 to move up and down, so that the pressure strip 320 squeezes or moves away from the plurality of plastic test strips 2000. Since the first placement groove 110 and the second placement groove 210 can simultaneously place multiple plastic test strips 2000, the force applying device 300 can simultaneously perform force tests on multiple plastic test strips 2000, simulating aging tests of the plastic test strips 2000 under different force conditions. Multiple plastic test strips 2000 can be placed in the placement grooves at one time, which can eliminate accidental situations, increase comparison, and improve the authenticity and accuracy of the test.

[0038] The first placement groove 110 in this embodiment is a through groove on the first bracket 100 extending perpendicular to the direction in which the first bracket 100 and the second bracket 200 are arranged in parallel, and the second placement groove 210 is also a through groove on the second bracket 200. One end of the plastic test strip 2000 is placed in the first placement groove 110, and the other end of the plastic test strip 2000 is placed in the second placement groove 210, and the first placement groove 110 and the second placement groove 210 jointly fix the plastic test strip 2000. The first placement groove 110 and the second placement groove 210 are located at the same horizontal height. The extension length of the first placement groove 110 and the second placement groove 210 is greater than the width of at least two plastic test strips 2000, so that a plurality of plastic test strips 2000 can be subjected to force tests at the same time. The width of the plastic test strip 2000 refers to the length of the plastic test strip 2000 located in the first placement groove 110 or the second placement groove 210.

[0039] In addition, in order to facilitate fixing the position of each plastic test strip 2000, the first placement groove 110 in the present embodiment includes a plurality of first grooves arranged at intervals, and / or the second placement groove 210 includes a plurality of second grooves arranged at intervals, the plurality of first grooves and the plurality of second grooves correspond one to one, and a group of first grooves and second grooves are used together to clamp and place a plastic test strip 2000 (not shown in the figure).

[0040] In order to better exert force on multiple plastic test strips 2000, the length of the bead 320 in this embodiment is greater than or equal to the extension length of the first placement groove 110, and the length direction of the bead 320 is parallel to the extension direction of the first placement groove 110. Of course, when fewer plastic test strips 2000 are placed, the length of the bead 320 can also be less than the extension length of the first placement groove 110. As long as the bead 320 can apply pressure to multiple plastic test strips 2000 at the same time, the length of the bead 320 only needs to be longer than the arrangement width of all plastic test strips 2000. The specific length of the bead 320 can be determined according to actual test requirements and is not limited here.

[0041] To simplify the tooling structure and reduce costs, please refer to Figure 1-Figure 3The moving assembly 310 in this embodiment includes a screw support 311 and a screw 312. The screw 312 is movably connected to the screw support 311. The screw support 311 is arranged between the first support 100 and the second support 200. The screw 312 is connected to the pressure strip 320. The screw 312 can drive the pressure strip 320 to move up and down, so that the pressure strip 320 squeezes or moves away from the plastic test strip 2000. The operator rotates the screw 312 to move the screw 312 up and down relative to the screw support 311, so that the screw 312 drives the pressure strip 320 to move up and down. Rotating the screw 312 moves the pressure strip 320 in a direction close to the plastic test strip 2000, so that the pressure strip 320 contacts the plastic test strip 2000. By controlling the downward height of the pressure strip 320, the magnitude of the force applied to the plastic test strip 2000 can be controlled. By adjusting the height of the screw 312, the aging test of the plastic test strip 2000 under different stress conditions can be realized.

[0042] In addition, the movable component 310 can also be a hydraulic cylinder and a hydraulic rod, or other driving parts and connecting parts. As long as the movable component 310 can realize that the pressure strip 320 can squeeze or move away from the plastic test strip 2000, the specific structure adopted can be selected according to the requirements of cost, test accuracy, etc. Different movable components 310 can be selected, and there is no limitation here.

[0043] In order to facilitate recording the magnitude of each applied force and analyzing the data, a pressure sensor or other sensing device may be provided on the pressure strip 320. The pressure sensor may be electrically connected to a display controller such as a display screen or a computer, so that the operator can record and analyze the test data (not shown in the figure).

[0044] The pressure strip 320 can be welded to the screw rod 312, and the pressure strip 320 can also be detachably connected to the screw rod 312. However, the pressure strip 320 may have some usage problems after long-term use, and may need to be replaced. In order to facilitate the replacement of the pressure strip 320, the pressure strip 320 in this embodiment is detachably connected to the moving component 310, such as threaded connection, flange connection, etc. Specifically, in this embodiment, the pressure strip 320 is provided with a mounting through hole 321, the screw rod 312 is connected to the pressure strip 320 through the mounting through hole 321, and the pressure strip 320 is fixed to the screw rod 312 by a nut. In order to facilitate the replacement of the pressure strip 320, the pressure strip 320 in this embodiment is threadedly connected to the screw rod 312. Specifically, the pressure strip 320 in this embodiment is provided with a mounting through hole 321, the screw rod 312 is connected to the pressure strip 320 through the mounting through hole 321, and the pressure strip 320 is fixed to the screw rod 312 by a nut.

[0045] Please continue reading Figure 1-Figure 3, the stress test fixture 1000 in this embodiment also includes a base plate 400, and the first bracket 100, the second bracket 200 and the moving assembly 310 are all connected to the base plate 400. In order to facilitate the assembly, disassembly and handling of the fixture, the first bracket 100, the second bracket 200 and the moving assembly 310 in this embodiment are all detachably connected to the base plate 400. Specifically, the first bracket 100 in this embodiment is connected to the base plate 400 by bolts, and / or, the second bracket 200 is connected to the base plate 400 by bolts, and / or, the moving assembly 310 is connected to the base plate 400 by bolts. Of course, the first bracket 100, the second bracket 200 and the moving assembly 310 can also be welded to the base plate 400. The first bracket 100, the second bracket 200 and the base plate 400 can also be designed as an integral structural member, which is not limited here.

[0046] Figure 4 This is a schematic diagram of the pressure strip 320 provided in the embodiment of the present utility model, please refer to Figure 4 The pressure strip 320 in this embodiment is a rectangular parallelepiped, and includes a mounting surface 322, a first connecting surface 323, an extrusion surface 324, and a second connecting surface 325 connected in sequence. The extrusion surface 324 is parallel to the mounting surface 322, and the extrusion surface 324 is used to press or move away from the plastic test strip 2000. Of course, the pressure strip 320 can also be designed as a cylindrical shape or other shapes, as long as the pressure strip 320 can perform force tests on multiple plastic test strips 2000 at the same time, and the specific shape and structure of the pressure strip 320 is not limited here.

[0047] In order to prevent the pressure strip 320 from damaging the plastic test strip 2000, the first connection surface 323 in this embodiment includes a first rectangular surface 3231 and a first arc surface 3232, the first rectangular surface 3231 and the first arc surface 3232 are connected, the first rectangular surface 3231 is connected to the mounting surface 322, and the first arc surface 3232 is connected to the extrusion surface 324. The second connection surface 325 includes a second rectangular surface 3251 and a second arc surface 3252, the second rectangular surface 3251 and the second arc surface 3252 are connected, the second rectangular surface 3251 is connected to the mounting surface 322, and the second arc surface 3252 is connected to the extrusion surface 324. The extrusion surface 324 and the first connection surface 323 and the second connection surface 325 are all transitioned by arc surfaces, and the contact surface between the layer 320 and the plastic test strip 2000 is smooth, so that the transition between the extrusion surface 324 and the first connection surface 323 and the second connection surface 325 can prevent the plastic test strip 2000 from being damaged, thereby affecting the accuracy of the stress aging test of the plastic test strip 2000. The use of arc surfaces for transition can reduce stress concentration, increase the compression and tensile properties of the layer 320, reduce stress concentration at the toughness angle and the occurrence of fatigue cracks, and thus increase the service life of the layer 320.

[0048] According to a stress test tool 1000 provided in this embodiment, its working principle is as follows:

[0049] Multiple plastic test strips 2000 are placed in the first placement groove 110 and the second placement groove 210 at intervals, and the moving assembly 310 drives the pressure strip 320 to approach the direction of the plastic test strip 2000, and squeezes the multiple plastic test strips 2000 at the same time, so that the plastic test strips 2000 are deformed until they are broken, and the load when the plastic test strips 2000 are broken is recorded. In this embodiment, the pressure strip 320 is driven to squeeze or move away from the plastic test strip 2000 by rotating the screw 312. Testing multiple plastic test strips 2000 at the same time can eliminate accidental situations, increase comparison, and improve the authenticity and accuracy of the test.

[0050] In summary, the force test fixture 1000 includes a first bracket 100, a second bracket 200 and a force applying device 300. The first bracket 100 is provided with a first placement groove 110; the second bracket 200 is spaced apart from the first bracket 100 and is parallel to each other; the second bracket 200 is provided with a second placement groove 210, and the second placement groove 210 is arranged opposite to the first placement groove 110; the first placement groove 110 and the second placement groove 210 are used together to place a plurality of plastic test strips 2000. The force applying device 300 includes a moving component 310 and a pressure strip 320, the moving component 310 is connected to the pressure strip 320, and the moving component 310 is arranged between the first bracket 100 and the second bracket 200; the moving component 310 can drive the pressure strip 320 to move up and down, so that the pressure strip 320 squeezes or moves away from the plurality of plastic test strips 2000. Since the first placement groove 110 and the second placement groove 210 can simultaneously place multiple plastic test strips 2000, the force applying device 300 can simultaneously perform force tests on multiple plastic test strips 2000, simulating aging tests of the plastic test strips 2000 under different force conditions. Multiple plastic test strips 2000 can be placed in the placement grooves at one time, which can eliminate accidental situations, increase comparison, and improve the authenticity and accuracy of the test.

[0051] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A stress test tool, characterized in that: include: A first bracket (100), wherein the first bracket (100) is provided with a first placement groove (110); a second bracket (200), the second bracket (200) and the first bracket (100) being arranged at an interval and parallel to each other; the second bracket (200) is provided with a second placement groove (210), the second placement groove (210) being arranged opposite to the first placement groove (110); the first placement groove (110) and the second placement groove (210) are used together to place a plurality of plastic test strips (2000); and A force applying device (300), the force applying device (300) comprising a moving component (310) and a pressure strip (320), the moving component (310) being connected to the pressure strip (320), the moving component (310) being arranged between the first bracket (100) and the second bracket (200); the moving component (310) can drive the pressure strip (320) to move up and down, so that the pressure strip (320) squeezes or moves away from the plurality of plastic test strips (2000).

2. The stress test fixture according to claim 1, characterized in that: The length of the pressure strip (320) is greater than or equal to the extension length of the first placement groove (110), and the length direction of the pressure strip (320) is parallel to the extension direction of the first placement groove (110).

3. The stress test fixture according to claim 1, characterized in that: The moving assembly (310) comprises a screw support (311) and a screw (312), wherein the screw (312) is movably connected to the screw support (311), and the screw support (311) is arranged between the first support (100) and the second support (200); the screw (312) is connected to the pressure strip (320); the screw (312) can drive the pressure strip (320) to move up and down, so that the pressure strip (320) squeezes or moves away from the plurality of plastic test strips (2000).

4. The stress test fixture according to claim 3, characterized in that: The pressure strip (320) is provided with a mounting through hole (321), the screw rod (312) passes through the mounting through hole (321) and is connected to the pressure strip (320), and the pressure strip (320) is fixed to the screw rod (312) via a nut.

5. The stress test fixture according to claim 1, characterized in that: The force testing fixture (1000) further comprises a bottom plate (400), and the first bracket (100), the second bracket (200) and the moving assembly (310) are all connected to the bottom plate (400).

6. The stress test fixture according to claim 5, characterized in that: The first bracket (100), the second bracket (200) and the moving assembly (310) are all detachably connected to the base plate (400).

7. The stress test fixture according to claim 6, characterized in that: The first bracket (100) is connected to the base plate (400) by bolts, and / or the second bracket (200) is connected to the base plate (400) by bolts, and / or the moving component (310) is connected to the base plate (400) by bolts.

8. The stress test fixture according to claim 1, characterized in that: The pressure strip (320) comprises a mounting surface (322), a first connecting surface (323), an extrusion surface (324) and a second connecting surface (325) which are connected in sequence, the extrusion surface (324) and the mounting surface (322) are parallel to each other, and the extrusion surface (324) is used to extrude or move away from the plastic test strip (2000).

9. The stress test fixture according to claim 8, characterized in that: The first connecting surface (323) comprises a first rectangular surface (3231) and a first arc surface (3232), the first rectangular surface (3231) and the first arc surface (3232) are connected, the first rectangular surface (3231) is connected to the mounting surface (322), and the first arc surface (3232) is connected to the extrusion surface (324); The second connecting surface (325) includes a second rectangular surface (3251) and a second arc surface (3252), the second rectangular surface (3251) and the second arc surface (3252) are connected, the second rectangular surface (3251) is connected to the mounting surface (322), and the second arc surface (3252) is connected to the extrusion surface (324).

10. The stress test fixture according to claim 1, characterized in that: The pressure strip (320) is detachably connected to the moving assembly (310).

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