Test clamp applied to non-metallic material test and high-low temperature stretcher
By adding an extension rod and a temperature chamber to the non-metallic material testing fixture, the problems of limited clamping space and temperature transfer deviation were solved, thus achieving test applicability and data accuracy for different materials and temperatures.
Patent Information
- Application Number
- CN202422502901.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-10-16
AI Technical Summary
Existing non-metallic material testing fixtures have problems such as limited clamping space, weak clamping of soft materials, and inaccurate data during temperature transfer.
A test fixture with an extension rod was designed to increase the clamping width and integrate with a temperature chamber. The clamping blocks can be adjusted to have multiple protrusions or teeth. The fixture is connected to a tensile testing machine via the extension rod to achieve high and low temperature testing.
The clamping mechanism has wide applicability and high temperature stability, which improves the accuracy and efficiency of test data.
Smart Images
Figure CN223461359U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of non-metallic material testing, and in particular relates to a test fixture and a high and low temperature stretching machine used for non-metallic material testing. Background Art
[0002] Mechanical testing of non-metallic materials is crucial for evaluating their performance in practical applications, particularly in engineering fields such as aerospace and automotive manufacturing. The rapid development of these fields has placed higher demands on the mechanical properties of non-metallic materials. Therefore, understanding the technical background and problem analysis of non-metallic mechanical testing is particularly important. The variety and application range of non-metallic materials are constantly expanding, including plastics, rubber, and composites. The application of these materials in simulation experiments provides an important means for studying the mechanical properties of non-metallic materials.
[0003] At present, non-metallic material tests are carried out by tensile testing machines to perform tensile, compression, bending and other tests on non-metallic materials in order to obtain the indicators of mechanical properties. Figure 1 As shown, the present invention comprises a base 1, two upright posts 2 are provided on the left and right sides of the top of the base 1, upper crossbeams 3 are provided on the tops of the upright posts 2 on both sides, and sliding crossbeams 4 are provided below the upper crossbeams 3 and can be slidably connected relative to the upright posts 2. The sliding crossbeams 4 form two working areas of the tensile machine, namely, working area A and working area B. Test fixtures 5 are installed on the opposite sides of the upper crossbeams 3 and the sliding crossbeams 4, and test fixtures 5 are also installed on the opposite sides of the sliding crossbeams 4 and the base 1. If the test fixture 5 installed in the working area A is a tensile fixture 6 and the test fixture 5 installed in the working area B is a compression fixture 7, then when performing a tensile or compression test on a non-metallic material, the tensile test or compression test is completed by controlling the sliding crossbeams 4 to drive the test fixture 5 thereon to move up and down. However, the existing test fixtures have the following problems:
[0004] 1. Existing tensile fixture 6 Figure 2 As shown, the handle 61 needs to be manually swung up and down to drive the clamping arms 62 on both sides to move laterally relative to the fixed body 63 to clamp or release the non-metallic material. However, the space for the existing clamping arms 62 to move laterally is limited, resulting in a relatively narrow distance between the clamping blocks 64. In the fully opened state, the width of the clamping opening 65 is only about 1 cm, so only relatively thin materials can be clamped.
[0005] 2. The existing clamping block 64 is limited by the clamping mouth 65. The working surface of the clamping block 64 can only have multiple protrusions to increase the friction during clamping. Therefore, it is only suitable for non-metallic materials with relatively hard materials, such as plastic, rubber, etc., while non-metallic materials with relatively soft materials, such as foam, leather, etc., cannot be clamped firmly due to the low friction force.
[0006] 3. Existing test fixtures are all connected to the stretching machine through the connecting shaft 66 at the end. Therefore, due to the limitation of the test fixture 5, the temperature box cannot be combined with the stretching machine and can only be stored separately. Before conducting the test, the non-metallic material needs to be placed in the temperature box. When the required temperature and time are reached, the non-metallic material is transferred to the stretching machine for testing. During the transfer process, the temperature of the non-metallic material will deviate, thus affecting the accuracy of the data. Utility Model Content
[0007] The purpose of the present utility model is to solve the above-mentioned problems and to provide a test fixture and a high and low temperature stretching machine for non-metallic material testing. The test fixture adds an extension rod at the connection with the stretching machine, so that the connection between the test fixture and the stretching machine has a certain distance, leaving space for the installation of a temperature box. Through the combination of the temperature box and the stretching machine, the problem of temperature deviation of non-metallic materials during the transfer process is solved, and the accuracy of the data is improved. At the same time, the present application innovates the structure of the stretching fixture, and increases the distance of the clamps by changing the structure, so that the working surface of the clamping block is not restricted by the clamps, and the applicability is wider.
[0008] In order to achieve the above-mentioned purpose, the utility model provides a test fixture for non-metallic material testing, the test fixture includes a tensile fixture, the end of the tensile fixture is provided with a first connecting shaft, the first connecting shaft is provided with a first connecting hole, the end of the connecting shaft is connected to a connecting plate, the connecting plate is provided with a scale, the connecting plate is connected to clamping arms on opposite sides of one end away from the connecting shaft, the clamping arms on both sides are provided with locking handles, the ends of the locking handles pass through the clamping arms and are detachably connected to the clamping block, and the clamping block can be driven to move laterally relative to the clamping arm through the locking handles.
[0009] As a further optimization, the opposite surfaces of the clamping blocks on both sides are provided with a plurality of protrusions or mutually meshing teeth.
[0010] As a further optimization, the test fixture also includes a compression fixture, the end of the compression fixture is provided with a second connecting shaft, the second connecting shaft is provided with a second connecting hole, and the end of the second connecting shaft is provided with a frustoconical pressure plate.
[0011] As a further optimization, the test fixture is detachably connected to one end of the extension rod through a connecting hole on the connecting shaft, and the other end of the extension rod is detachably connected to the stretching machine.
[0012] As a further optimization, the lengthening rod is a telescopic lengthening rod, comprising a stretcher connecting rod, a locking nut and a clamp connecting rod, one end of the stretcher connecting rod is provided with a third connecting hole connected with the stretcher, the other end of the stretcher connecting rod is threadedly connected with one end of the clamp connecting rod and is locked and fixed through the locking nut, and the other end of the clamp connecting rod is provided with a fourth connecting hole connected with the test clamp.
[0013] A high-low temperature stretcher applied to non-metal material test, comprising the test clamp, the test clamp is connected in the working area B of the stretcher through the lengthening rod, the upper test clamp is connected on the moving cross beam through the lengthening rod, the lower test clamp is connected on the base through the lengthening rod, the top of the base is provided with a temperature box, the upper and lower ends of the temperature box are provided with avoiding openings relative to the position of the lengthening rod, the lengthening rod and the test clamp connected with the lengthening rod are arranged in the temperature box through the avoiding openings, and the avoiding openings matched with the lengthening rod are blocked through the sliding cover.
[0014] As a further optimization, the temperature box and the base are provided with a sliding rail, the bottom of the temperature box is connected with a sliding block, the sliding block is slidably connected with the sliding rail, one end of the sliding rail is connected with the base, and the other end of the sliding rail is connected with a support behind the base.
[0015] The utility model discloses the advantages and beneficial effects
[0016] 1, the utility model discloses a simple structure, low in cost of tensile fixture, through first connecting axle and stretcher or lengthening rod are connected, and the opposite side of the one end of the connecting plate away from first connecting axle is connected with the clamping arm, and the locking handle of movable relative to the clamping arm is equipped on the clamping arm, and the opposite side of two locking handles is equipped with the clamping block, and the clamping of sample is realized through the lateral movement of the clamping block of two sides driven by the rotary handle of two sides, and the width of the clamping opening is increased after the change tensile fixture, therefore thin non -metallic material and thick non -metallic material can be applicable.
[0017] 2, the utility model discloses the clamping opening of tensile fixture is relatively wide, therefore the clamping block is not limited by the space of the clamping opening, and the working surface of two clamping blocks can be designed as a plurality of convex points or is equipped with intermeshing tooth type, when testing the non -metallic material of relatively hard, can change into the locking block of the working surface with a plurality of convex points, when testing the non -metallic material of relatively soft, can change into the locking block of the working surface of tooth type, therefore the range of adaptation is wider.
[0018] 3, the utility model discloses that the tensile fixture is equipped with a scale on the connecting plate, therefore the centring of non -metallic material can be adjusted on the tensile fixture.
[0019] 4、The utility model discloses can select different test fixtures according to the type of non -metal material test, such as tensile fixture, compression fixture or bending fixture, the test fixture is added elongated bar between tensile machine, therefore increases the height of test fixture relative tensile machine, to satisfy the installation requirement of temperature case, and the tensile machine after combining with temperature case can satisfy the test requirement of non -metal material under different temperature, under the room temperature condition, tensile machine and temperature case can be used alone, when carrying out high and low temperature test, tensile machine can also be combined with temperature case, avoid the temperature deviation of non -metal material in the process of shifting from temperature case, improve the accuracy of test data and the work efficiency of test. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be briefly introduced the drawing needed to be used in the embodiment description, obviously, the drawing in the following description only is the embodiment of the utility model, for the ordinary skilled person in the art, under the premise of not paying the creative labor, can also obtain other drawings according to the provided drawing.
[0021] Figure 1 It is the schematic diagram of tensile machine and existing test fixture installation after;
[0022] Figure 2 It is the structural schematic diagram of existing test fixture;
[0023] Figure 3 It is the exploded schematic diagram of elongated rod and test fixture provided by the utility model;
[0024] Figure 4 It is the structural schematic diagram of elongated rod provided by the utility model;
[0025] Figure 5 It is the schematic diagram of tensile fixture provided by the utility model;
[0026] Figure 6 It is the schematic diagram of compression fixture provided by the utility model;
[0027] Figure 7 It is the structural schematic diagram of temperature case provided by the utility model.
[0028] Reference numerals of prior art: Base 1, stand 2, upper crossbeam 3, sliding crossbeam 4, work area A, work area B, test fixture 5, tensile fixture 6, handle 61, clamping arm 62, fixed body 63, clamping block 64, clamping mouth 65, connecting shaft 66 and compression fixture 7.
[0029] Reference numerals of the present application:Test fixture 1, tensile clamp 11, first connecting shaft 111, first connecting hole 112, connecting plate 113, scale 114, clamp arm 115, locking handle 116, clamping block 117, compression clamp 12, second connecting shaft 121, second connecting hole 122, compression disc 123, extension rod 2, tensile machine connecting rod 21, third connecting hole 211, locking nut 22, clamp connecting rod 23, fourth connecting hole 231, temperature box 3, escape 31 and sliding cover 32. DETAILED DESCRIPTION
[0030] The terms "first", "second", "third", "fourth" and the like in the description and in the claims of the present application and in the above DETAILED DESCRIPTION are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of these terms herein is merely for distinguishing between the similar objects and the use of these terms herein cannot be construed as implying a specific order or sequence.
[0031] The specific embodiments of the present application will be described below in detail with reference to the drawings. It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer", "front", "back", etc. indicate the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0032] A test fixture applied to non-metal material test, the test fixture plays a role in fixing samples, ensures the stability and accuracy of non-metal materials during the test process, the test fixture 1 includes a tensile clamp 11, the structure of the tensile clamp 11 is as Figure 5As shown, the end of the stretching clamp 11 is provided with a first connecting shaft 111, the first connecting shaft 111 is provided with a first connecting hole 112, the upper stretching clamp and the lower stretching clamp are connected with the stretching machine by inserting a pin shaft into the first connecting hole 112, and after being connected, locking nuts are used for locking and fixing, the end of the connecting shaft 111 is connected with a connecting plate 113, the connecting plate 113 is provided with a scale 114, the scale 114 can ensure that the sample is centered and clamped, the left and right sides of the end of the connecting plate 113 away from the connecting shaft 111 are connected with clamping arms 115, the connecting plate 113 and the clamping arms 115 can be integrally connected or fixedly connected, the clamping arms 115 on the two sides are threadedly connected with locking handles 116, the ends of the locking handles 116 are threadedly connected with clamping blocks 117 through the clamping arms 115, by rotating the locking handles 116 on the two sides, the locking blocks 117 on the two sides can be driven to move inward or outward relative to the clamping arms 115, so as to clamp the sample or release the sample, due to the change of the structure, the gap between the two clamping blocks 117 is larger, so that different thickness samples can be clamped through the gap, meanwhile, the working surface of the clamping block 117 is not limited by the size of the gap, the working surface can be made into a working surface with multiple convex points or a working surface with a tooth type, when the stretching clamp is used for clamping and fixing, different clamping blocks 117 with different clamping forces can be replaced according to the different sample materials, the clamping block 117 with the working surface with multiple convex points is suitable for clamping samples with a hard material, and the clamping block 117 with the working surface with a tooth type is suitable for clamping samples with a soft material, so the adaptability is wider.
[0033] As shown in the drawings, Figure 6 As shown, the test clamp 1 further comprises a compression clamp 12, the end of the compression clamp 12 is provided with a second connecting shaft 121, the second connecting shaft 121 is provided with a second connecting hole 122, the upper compression clamp and the lower compression clamp are connected with the stretching machine by inserting a pin shaft into the second connecting hole 122, and after being connected, locking nuts are used for locking and fixing, the end of the second connecting shaft 121 is provided with a circular truncated cone type compression plate 123, by moving the horizontal beam upward or downward, the compression plate 123 on the moving horizontal beam is driven to move upward or downward, so as to cooperate with the compression plate 123 on the opposite side to complete the compression test of the sample.
[0034] In order to make the stretching machine cooperate with the temperature box, the lengthening rod 2 is arranged between the stretching machine and the test fixture 1, so that the distance between the test fixture 1 and the stretching machine is increased, and when the temperature box is installed on the stretching machine, the test fixture 1 can be located in the temperature box. The lengthening rod 2 can be a fixed lengthening rod or a telescopic lengthening rod. When the lengthening rod 2 is a fixed lengthening rod, the two ends of the lengthening rod 2 are provided with a third connecting hole 211 and a fourth connecting hole 231. One end of the lengthening rod 2 is detachably connected to the stretching machine by inserting a pin into the third connecting hole 211, and after connection, the locking nut is used for locking and fixing. The other end of the lengthening rod 2 is detachably connected to the first connecting hole 112 on the test fixture 1 by inserting a pin into the fourth connecting hole 231, and after connection, the locking nut is used for locking and fixing.
[0035] Due to the internal space of the temperature box, the test type, the size of the sample and other factors, it is necessary to adjust the test fixture 1 to the corresponding position, so the lengthening rod is designed as a telescopic lengthening rod, as shown in Figure 3 and Figure 4 The lengthening rod 2 includes a stretching machine connecting rod 21, a locking nut 22 and a fixture connecting rod 23. One end of the stretching machine connecting rod 21 is provided with a third connecting hole 211 connected to the stretching machine. The other end of the stretching machine connecting rod 21 is threadedly connected to one end of the fixture connecting rod 23. By rotating the fixture connecting rod 23, the overall length of the lengthening rod 2 can be adjusted. When the required length is reached, the locking nut 22 is used for locking and fixing. The other end of the fixture connecting rod 23 is provided with a fourth connecting hole 231 connected to the test fixture 1. The fixture connecting rod 23 is connected by inserting a pin into the fourth connecting hole 231 and the first connecting hole 112 on the test fixture 1. After connection, the locking nut is used for locking and fixing. The test fixture 1 can be selected according to different test types. For example, when the tensile test is performed, the tensile fixture 11 can be selected for connection. When the compression test is performed, the compression fixture 12 can be selected for connection. When the bending test is performed, the bending fixture can be selected for connection.
[0036] A high-low temperature stretching machine applied to non-metal material test, comprising any one of the test fixtures 1 described above, the test fixture 1 is connected in the working area B of the stretching machine through the lengthening rod 2, that is, the test fixture 1 above is connected on the moving cross beam through the lengthening rod 2, and the test fixture 1 below is connected on the base through the lengthening rod 2. The top of the base is provided with a temperature box 3. The structure of the temperature box is shown in Figure 7 The positions of the temperature box 3 on the upper and lower ends relative to the lengthening rod 2 are provided with an avoiding opening 31. The lengthening rod 2 and the test fixture 1 connected with the lengthening rod 2 are inserted into the avoiding opening 31 from the front of the temperature box 3, so that the test fixture 1 is located in the inside of the temperature box 3. Then the avoiding opening 31 matched with the lengthening rod 2 is plugged by the sliding cover 32.
[0037] In order to make the temperature box not occupy the space of the working area B of the stretching machine when not in use, the embodiment is provided with a sliding rail between the temperature box 3 and the base, the bottom of the temperature box 3 is connected with a sliding block, the sliding block is in sliding connection with the sliding rail, one end of the sliding rail is connected with the base, the other end of the sliding rail is connected with a support behind the base, when high and low temperature test is needed, the temperature box above the support is slid into the working area B of the stretching machine, so that the sample can be tested in the temperature box, and the sample does not need to be transferred after reaching the specified temperature, when room temperature test is needed, the temperature box in the working area B can be slid to the support behind the base, and the remaining avoiding opening is blocked by a blocking cover, so that the stretching machine and the temperature box can be used separately.
[0038] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, and not to limit them; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the embodiments of the present application.
Claims
1. A test fixture for non-metallic material testing, characterized by: The test fixture (1) comprises a tensile fixture (11), the end of the tensile fixture (11) is provided with a first connecting shaft (111), the first connecting shaft (111) is provided with a first connecting hole (112), the end of the connecting shaft (111) is connected with a connecting plate (113), the connecting plate (113) is provided with a scale (114), the opposite sides of the end of the connecting plate (113) away from the connecting shaft (111) are connected with clamping arms (115), the clamping arms (115) are provided with locking handles (116), the ends of the locking handles (116) are detachably connected with clamping blocks (117) through the clamping arms (115), and the clamping blocks (117) can be driven to move transversely relative to the clamping arms (115) through the locking handles (116).
2. The test fixture of claim 1, wherein: The opposite sides of the clamping blocks (117) are provided with a plurality of convex points or teeth.
3. The test fixture of claim 1, wherein: The test fixture (1) further comprises a compression fixture (12), the end of the compression fixture (12) is provided with a second connecting shaft (121), the second connecting shaft (121) is provided with a second connecting hole (122), and the end of the second connecting shaft (121) is provided with a circular truncated cone-shaped compression disc (123).
4. The test fixture of any one of claims 1 to 3, wherein: the non-metallic material is a composite material; and the non-metallic material is a fiber reinforced polymer material. The test fixture (1) is detachably connected with one end of an extension rod (2) through the connecting hole in the connecting shaft, and the other end of the extension rod (2) is detachably connected with a stretching machine.
5. The test fixture of claim 4, wherein: The extension rod (2) is a telescopic extension rod, which comprises a stretching machine connecting rod (21), a locking nut (22) and a fixture connecting rod (23), one end of the stretching machine connecting rod (21) is provided with a third connecting hole (211) connected with the stretching machine, the other end of the stretching machine connecting rod (21) is threadedly connected with one end of the fixture connecting rod (23) and is locked and fixed through the locking nut (22), and the other end of the fixture connecting rod (23) is provided with a fourth connecting hole (231) connected with the test fixture (1).
6. A high-low temperature tensile testing machine for testing non-metallic materials, characterized in that: The test fixture (1) is connected in the working area B of the stretching machine through the extension rod (2), the upper test fixture (1) is connected on the moving cross beam through the extension rod (2), the lower test fixture (1) is connected on the base, the top of the base is provided with a temperature box (3), the upper and lower ends of the temperature box (3) are provided with avoiding openings (31) relative to the positions of the extension rod (2), the extension rod (2) and the test fixture (1) connected with the extension rod (2) are arranged in the temperature box (3) through the avoiding openings (31), and the avoiding openings (31) matched with the extension rod (2) are sealed through the sliding cover (32).
7. The high-low temperature tensile testing machine for non-metallic materials according to claim 6, characterized in that: The temperature box (3) and the base are provided with sliding rails, the bottom of the temperature box (3) is connected with a sliding block, the sliding block is slidably connected with the sliding rails, one end of the sliding rails is connected with the base, and the other end of the sliding rails is connected with a support behind the base.