Resin strip tensile test stress change observation device

Abstract

本实用新型公开了树脂样条拉伸试验应力变化观察装置，其中包括拉伸机构和光学检测装置，光学检测装置位于拉伸机构内部两侧，光学检测装置包括第一反射镜，第一反射镜底部固定有转轴一，转轴一底部轴承连接有滑块一，滑块一底部固定有第二电机，第二电机的输出轴贯穿滑块一与转轴一键连接，使得第一反射镜可以沿转轴一的轴线旋转一定角度，光学检测装置包括第一升降板，第一升降板顶部开设有滑槽一，滑槽一内部与滑块一滑动连接，滑块一呈“干”字型，起到一个支撑的作用，第一升降板顶部固定有LED灯和起偏器，第一升降板两端开设有螺纹孔一，该装置解决了当前不可调整反光镜角度和高度的问题。

Description

Technical Field

[0001] The utility model belongs to the technical field of material mechanical property testing, and particularly relates to a stress change observation device for a resin spline tensile test. Background Art

[0002] Resin materials have excellent properties and are widely used in aerospace, automobile, electronics and other fields. Tensile test is one of the important methods to evaluate the mechanical properties of resin materials, and important performance indexes such as yield strength, tensile strength and elongation at break of resin materials can be obtained through tensile test. In the field of photomechanics, photoelasticity is a classical stress visualization observation method. Its basic principle is that a transparent resin spline with temporary birefringence effect is placed in a polarized light field composed of a polarizer and an analyzer. When the spline is stressed, the internal stress will appear in the form of interference fringes of alternating light and dark or color.

[0003] However, such prior art still has obvious defects: the fixed optical path design cannot adapt to splines of different sizes and shapes. When replacing splines or fixtures of different specifications, the height of the effective observation area may change, and the reflector with fixed angle cannot adjust the penetration position of the optical path accordingly, resulting in decreased or even invalid observation effect. This phenomenon has become an urgent problem to be solved by those skilled in the art. Content of Utility Model

[0004] The purpose of the utility model is to address the problems raised in the above background art aiming at the existing stress change observation device for resin spline tensile test.

[0005] In order to solve the above technical problem, the utility model provides the following technical solutions: a stress change observation device for a resin spline tensile test, comprising a stretching mechanism and an optical detection device, wherein the optical detection device is located on both sides inside the stretching mechanism, the optical detection device comprises a first reflector, a first rotating shaft is fixed at the bottom of the first reflector, a first slider is bearing-connected at the bottom of the first rotating shaft, a second motor is fixed at the bottom of the first slider, and an output shaft of the second motor penetrates the first slider and is connected with the first rotating shaft by a key, so that the first reflector can rotate a certain angle along the axis of the first rotating shaft.

[0006] The utility model further illustrates that the optical detection device comprises a first lifting plate, a first chute is opened at the top of the first lifting plate, the interior of the first chute is slidably connected with the first slider, the first slider is in a "gan-shaped" structure and plays a supporting role, an LED lamp and a polarizer are fixed at the top of the first lifting plate, and first threaded holes are opened at both ends of the first lifting plate.

[0007] The utility model further illustrates that the optical detection device comprises a second lifting plate, the first lifting plate and the second lifting plate are symmetrically arranged, an analyzer is fixed on the top of the second lifting plate, a second sliding groove is formed on the top of the second lifting plate, a second sliding block is slidably connected inside the second sliding groove, the second sliding block is in a "dry" shape, a second rotating shaft is bearing-connected to the top of the second sliding block, and a second reflecting mirror is fixed on the top of the second rotating shaft.

[0008] The utility model further illustrates that a third motor is fixedly connected to the bottom of the second sliding block, an output shaft of the third motor penetrates through the second sliding block and is in key connection with the second rotating shaft, a second threaded hole is formed at one end of the second lifting plate, the second threaded hole is in threaded connection with a threaded rod, and a telescopic rod is fixedly fixed at the bottom of the other end of the second lifting plate.

[0009] The utility model further illustrates that the stretching mechanism comprises a base and a stand column, three groups of lifting mechanisms are bolted to the top of the base, each lifting mechanism comprises a U-shaped frame, threaded rods are bearing-connected to two ends of the U-shaped frame, a first bevel gear is fixedly connected to the top of the threaded rod, a support frame is fixed at one end of the U-shaped frame and is collinear with the support frame, a first motor is fixed in the middle of the support frame, an output shaft of the first motor is in key connection with a second bevel gear, the second bevel gear meshes with the first bevel gear, and the threaded rod is in threaded connection with the insides of two first threaded holes.

[0010] The utility model further illustrates that the tops of two ends of the base are bolted to the stand column, a driving mechanism is slidably connected to the stand column, the driving mechanism can be driven by an air cylinder, an upper clamping block is fixed at the bottom of the driving mechanism, a lower clamping block is fixed at the top of the base, the upper clamping block 101 and the lower clamping block 102 are pneumatic clamping jaws, and a resin sample strip is in contact connection with the insides of the upper clamping block and the lower clamping block.

[0011] Compared with the prior art, the beneficial effects achieved by the utility model are as follows: the utility model is provided with a rotatable and movable reflecting mirror, which can adjust the center according to the position of the resin sample strip to ensure that light passes through the center of the resin sample strip; by arranging the reflecting mirror to fold the optical path, the optical path system that traditionally requires a long horizontal space is compressed into a smaller cubic space, which greatly reduces the overall volume and floor area of the equipment, and is convenient to place and use on a laboratory bench. Description of Drawings

[0012] The drawings are used to provide a further understanding of the utility model, constitute a part of the description, and are used to explain the utility model together with the embodiments of the utility model, and do not constitute a limitation to the utility model. In the drawings: Figure 1 is a schematic diagram of the overall structure of the utility model; Figure 2 is a schematic diagram of the optical detection device of the utility model; Figure 3 is a schematic connection diagram of the first reflecting mirror of the utility model; Figure 4 is a schematic connection diagram of the second reflector of the present utility model; Figure 5 is a schematic diagram of the lifting mechanism of the present utility model; In the figures: 1, stretching mechanism; 101, upper clamping block; 102, lower clamping block; 103, resin sample strip; 104, base; 105, upright column; 106, driving mechanism; 2, optical detection device; 201, LED lamp; 202, polarizer; 203, first reflector; 204, second reflector; 205, analyzer; 206, first lifting plate; 2061, first chute; 2062, first threaded hole; 207, second lifting plate; 2071, second chute; 2072, second threaded hole; 3, lifting mechanism; 301, first motor; 302, first bevel gear; 303, second bevel gear; 304, threaded rod; 305, U-shaped frame; 306, support frame; 4, first slider; 401, second motor; 402, first rotating shaft; 5, second slider; 501, third motor; 502, second rotating shaft 6, telescopic rod. DETAILED DESCRIPTION OF EMBODIMENTS

[0013] The technical solution of the present utility model will be further described in detail in a non-limiting manner below with reference to preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0014] Please refer to Figure 1-5 , the present utility model provides a technical solution: an apparatus for observing stress change in a resin sample strip stretching test, comprising a stretching mechanism 1 and an optical detection device 2, wherein the optical detection device 2 is located on two inner sides of the stretching mechanism 1, the optical detection device 2 comprises a first reflector 203, a rotating shaft 402 is fixed at the bottom of the first reflector 203, a first slider 4 is connected to a bearing at the bottom of the first rotating shaft 402, a second motor 401 is fixed at the bottom of the first slider 4, an output shaft of the second motor 401 penetrates the first slider 4 and is in key connection with the first rotating shaft 402, so that the first reflector 203 can rotate by a certain angle along the axis of the first rotating shaft 402; the optical detection device 2 comprises a first lifting plate 206, a first chute 2061 is opened at the top of the first lifting plate 206, the interior of the first chute 2061 is in sliding connection with the first slider 4, the first slider 4 is in a "gan"-shaped configuration, which plays a supporting role, an LED lamp 201 and a polarizer 202 are fixed at the top of the first lifting plate 206, first threaded holes 2062 are opened at two ends of the first lifting plate 206; The optical detection device 2 comprises a second lifting plate 207, the first lifting plate 206 and the second lifting plate 207 are arranged symmetrically, an analyzer 205 is fixed on the top of the second lifting plate 207, a second chute 2071 is opened on the top of the second lifting plate 207, a second slider 5 is slidably connected inside the second chute 2071, the second slider 5 is in a "gan" shape, a second rotating shaft 502 is bearing-connected to the top of the second slider 5, and a second reflecting mirror 204 is fixed on the top of the second rotating shaft 502; A third motor 501 is fixedly connected to the bottom of the second slider 5, an output shaft of the third motor 501 penetrates the second slider 5 and is in key connection with the second rotating shaft 502, a second threaded hole 2072 is opened at one end of the second lifting plate 207, the second threaded hole 2072 is in threaded connection with a threaded rod 304, a telescopic rod 6 is fixed at the bottom of the other end of the second lifting plate 207, the telescopic rod 6 is in the prior art, and no further description is given herein; The stretching mechanism 1 comprises a base 104 and a stand column 105, three groups of lifting mechanisms 3 are bolted to the top of the base 104, the lifting mechanism 3 comprises a U-shaped frame 305, the threaded rod 304 is bearing-connected to two ends of the U-shaped frame 305, a first bevel gear 302 is fixedly connected to the top of the threaded rod 304, a support frame 306 is fixed at one end of the U-shaped frame 305 and is collinear with the support frame 306, a first motor 301 is fixed in the middle of the support frame 306, an output shaft of the first motor 301 is in key connection with a second bevel gear 303, the second bevel gear 303 meshes with the first bevel gear 302, and the threaded rod 304 is in threaded connection with the interiors of two first threaded holes 2062; The top of two ends of the base 104 is bolted to the stand column 105, a driving mechanism 106 is slidably connected to the stand column 105, the driving mechanism 106 can be driven by an air cylinder, which is in the prior art, and no further description is given herein, an upper clamping block 101 is fixed at the bottom of the driving mechanism 106, a lower clamping block 102 is fixed at the top of the base 104, the upper clamping block 101 and the lower clamping block 102 are pneumatic clamping jaws, which are in the prior art, and no further description is given herein, and a resin sample strip 103 is in contact connection inside the upper clamping block 101 and the lower clamping block 102.

[0015] Working principle: The resin sample 103 is clamped and fixed between the upper clamping block 101 and the lower clamping block 102. The LED light 201 is turned on. The light path is as follows: the light passes through the polarizer 202 and reaches the first reflecting mirror 203. The first reflecting mirror 203 reflects the light perpendicularly onto the resin sample 103. The light passes through the resin sample 103 and reaches the second reflecting mirror 204. The second reflecting mirror 204 reflects the light perpendicularly onto the analyzer 205. According to the reflection diagram, the first lifting plate 206 and the second lifting plate 205 are adjusted. At a height of 7, sliders 4 and 5 can drive the first reflector 203 and the second reflector 204 to move along the slide groove 2061 and slide groove 2071, driving the second motor 401 and the third motor 501, which can rotate the first reflector 203 and the second reflector 204 to a suitable angle, so that light passes through the central area of ​​the resin strip 103, opening the drive mechanism 106, so that the resin strip 103 is stretched, and the stress change can be observed by the naked eye on the analyzer 205.

[0016] Depending on the size of the resin sample 103, the height of the lifting mechanism 3, the angle and horizontal position of the first reflector 203 and the second reflector 204 can be adjusted to ensure that light passes through the center of the resin sample 103.

[0017] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for observing stress changes in a resin specimen tensile test, comprising a tensile mechanism (1) and an optical detection device (2), characterized in that: The optical detection device (2) is located on both inner sides of the stretching mechanism (1), the optical detection device (2) comprises a first reflecting mirror (203), a first rotating shaft (402) is fixed at the bottom of the first reflecting mirror (203), a first sliding block (4) is connected to the bottom of the first rotating shaft (402) through a bearing, a second motor (401) is fixed at the bottom of the first sliding block (4), and an output shaft of the second motor (401) penetrates through the first sliding block (4) and is in key connection with the first rotating shaft (402).

2. The apparatus for observing stress changes in resin strip tensile tests according to claim 1, characterized in that: The optical detection device (2) comprises a first lifting plate (206), a first sliding chute (2061) is formed in the top of the first lifting plate (206), the interior of the first sliding chute (2061) is in sliding connection with the first sliding block (4), the first sliding block (4) is in a shape of Chinese character '干', an LED lamp (201) and a polarizer (202) are fixed at the top of the first lifting plate (206), and first threaded holes (2062) are formed at two ends of the first lifting plate (206).

3. The apparatus for observing stress changes in resin strip tensile tests according to claim 2, characterized in that: The optical detection device (2) comprises a second lifting plate (207), the first lifting plate (206) and the second lifting plate (207) are symmetrically arranged, an analyzer (205) is fixed at the top of the second lifting plate (207), a second sliding chute (2071) is formed in the top of the second lifting plate (207), a second sliding block (5) is slidably connected inside the second sliding chute (2071), the second sliding block (5) is in a shape of Chinese character '干', a second rotating shaft (502) is connected to the top of the second sliding block (5) through a bearing, and a second reflecting mirror (204) is fixed at the top of the second rotating shaft (502).

4. The apparatus for observing stress changes in resin strip tensile tests according to claim 3, characterized in that: A third motor (501) is fixedly connected to the bottom of the second sliding block (5), an output shaft of the third motor (501) penetrates through the second sliding block (5) and is in key connection with the second rotating shaft (502), a second threaded hole (2072) is formed at one end of the second lifting plate (207), the second threaded hole (2072) is in threaded connection with a threaded rod (304), and a telescopic rod (6) is fixed at the bottom of the other end of the second lifting plate (207).

5. The apparatus for observing stress changes in resin strip tensile tests according to claim 4, characterized in that: The stretching mechanism (1) comprises a base (104) and a stand column (105), three groups of lifting mechanisms (3) are connected to the top of the base (104) through bolts, each lifting mechanism (3) comprises a U-shaped frame (305), the threaded rod (304) is connected to two ends of the U-shaped frame (305) through bearings, a first bevel gear (302) is fixedly connected to the top of the threaded rod (304), a support frame (306) is fixed at one end of the U-shaped frame (305) and is on the same straight line as the support frame (306), a first motor (301) is fixed in the middle of the support frame (306), an output shaft of the first motor (301) is in key connection with a second bevel gear (303), the second bevel gear (303) is meshed with the first bevel gear (302), and the threaded rod (304) is in threaded connection with the interiors of the two first threaded holes (2062).

6. The apparatus for observing stress changes in resin strip tensile tests according to claim 5, characterized in that: The top of both ends of the base (104) are bolted to the column (105). The column (105) is slidably connected to the drive mechanism (106). The bottom of the drive mechanism (106) is fixed with an upper clamping block (101). The top of the base (104) is fixed with a lower clamping block (102). The upper clamping block (101) and the lower clamping block (102) are internally connected with resin strips (103).

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