Clamp for measuring tensile sample

Abstract

The utility model relates to the technical field of measuring clamps, in particular to a clamp for measuring a tensile sample, which comprises a die base and a measuring mechanism, the die base is formed by matching a male die and a female die in a sliding manner, and the upper surfaces of the male die and the female die are respectively connected with a supporting plate in a sliding manner; one end of the upper surface of the male die and one end of the upper surface of the female die are each slidably connected with a supporting plate, the supporting plates and the supporting plates are located on the same central axis, and the two sets of measuring mechanisms are slidably installed on one side of the upper surface of the male die and one side of the upper surface of the female die respectively. The distance between the male die and the female die can be adjusted according to the length of a material sample, the material sample is supported through the supporting plate and the supporting plate, the clamping stability of the material sample is improved, the material sample is prevented from shaking in the measurement process, and the accuracy of a measurement result is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to measuring fixture technical field especially relates to a kind of fixture for tensile specimen measurement. BACKGROUND

[0002] Tensile specimen measurement refers to the material under axial tensile load to determine the material properties of a test method, the data obtained by using tensile material specimen experiment can be used to determine the elongation of material and various performance indicators.

[0003] Tension testing machine is a kind of equipment for measuring material mechanical properties, mainly used for measuring the mechanical behavior of material in tensile or compression state. Its working principle is: the material sample is vertically placed in the working space area, then the double-column load frame is used, with the help of two fixture devices on the frame, the first and last ends of the material sample are clamped in turn, with the help of computer control processing system, a certain tension is applied at uniform speed between the two clamps, and the whole process continues until the material sample is broken.

[0004] When measuring the material sample, first use vernier caliper to measure the original gauge length (i.e. the length of the sample before stretching), and then use vernier caliper to measure the total length of the sample after breaking. When testing, the material sample needs to be held by hand, which causes poor stability and inaccurate measurement data. SUMMARY

[0005] The utility model aims at providing a kind of fixture for tensile specimen measurement, can adapt to different length of material sample, it is fixed conveniently, solve the problem of poor stability when measuring, easy to produce measurement error.

[0006] In order to solve the above technical problem, the utility model adopts the technical scheme: a kind of fixture for tensile specimen measurement, including mould base and measuring mechanism, the mould base is formed by the sliding fit of male die and female die, the upper surface of the male die and female die is slidably connected with the supporting plate, the upper surface of the male die and female die is slidably connected with the supporting plate, the supporting plate and the supporting plate are on the same central axis, the measuring mechanism is provided with two groups, two groups of measuring mechanism are slidably installed on the upper surface of the male die and female die.

[0007] Preferably, the measuring mechanism includes a sliding block and a measuring rod, the upper surface of the male die and female die is provided with dovetail groove two, the lower surface of the sliding block is provided with dovetail block two matched with the dovetail groove two, the upper surface of the sliding block is provided with a vertical rod, the vertical rod is slidably connected with a rectangular block, one end of the measuring rod is rotatably connected with the rectangular block, and the other end of the measuring rod is provided with a tapered tip.

[0008] Preferably, one end of the rectangular block is provided with a ball socket, and one end of the measuring rod is provided with a ball head matching the ball socket, and the ball head is embedded in the ball socket.

[0009] Preferably, the upper surfaces of the male mold and the female mold are both provided with a dovetail groove one, and the lower surface of the supporting plate is provided with a dovetail block one matching the dovetail groove one.

[0010] Preferably, the upper surfaces of the male mold and the female mold are both provided with two groups of grooves, and the two groups of grooves are arranged on the two sides of the dovetail groove one, the two sides of the lower surface of the supporting plate are provided with vertical plates, the vertical plates are embedded in the corresponding grooves, and the two sides of the female mold are provided with threaded holes communicating with the grooves, and the threaded holes are screwed with bolts abutting against the vertical plates.

[0011] Preferably, the upper surface of the supporting plate is provided with a V-shaped groove one, the upper surface of the supporting plate is provided with a V-shaped groove two, and the V-shaped groove two is on the same central axis as the V-shaped groove one.

[0012] Preferably, one end of the male mold facing the female mold is provided with a guide rod, and one end of the female mold is provided with a guide hole, and the guide rod is embedded in the guide hole.

[0013] After the above technical scheme is adopted, the beneficial effects of the present application are as follows:

[0014] The present application can adjust the distance between the male mold and the female mold according to the length of the material sample, the material sample is held by the supporting plate and the supporting plate, the stability of clamping the material sample is increased, the material sample is prevented from shaking during the measurement process, and the accuracy of the measurement result is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 It is a structural schematic view of the present application;

[0017] Figure 2 It is a structural schematic view of the male mold;

[0018] Figure 3 It is a structural schematic view of the female mold;

[0019] Figure 4 It is a structural schematic view of the measuring mechanism;

[0020] Figure 5Fig. 2 is a partial enlarged view of the measuring mechanism.

[0021] BRIEF DESCRIPTION OF DRAWINGS 1 - male die, 2 - guide rod, 3 - female die, 4 - support plate, 5 - support plate, 6 - measuring mechanism, 7 - groove, 8 - threaded hole, 9 - bolt, 10 - vertical plate, 11 - V-shaped groove I, 12 - V-shaped groove II, 13 - dovetail groove I, 14 - dovetail groove II, 15 - guide hole, 16 - dovetail block I, 17 - dovetail block II, 18 - sliding block, 19 - vertical rod, 20 - rectangular block, 21 - measuring rod, 22 - ball head, 23 - ball socket. DETAILED DESCRIPTION

[0022] The features and exemplary embodiments of each aspect of the present application will be described in detail below, in order to make the purpose, technical scheme and advantages of the present application more clear and apparent, the present application will be described in further detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are configured only to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

[0023] The orientation words appearing in the following description are the directions shown in the drawings, and are not limited to the specific structure of the present application. In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected or integrally connected; it can be directly connected, or it can be indirectly connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] As shown in the accompanying Figures 1-5 The embodiment of the present application provides a clamp for tensile specimen measurement, which comprises a mold base, a support plate 4, a support plate 5 and a measuring mechanism 6. The clamp can adjust the clamping distance according to the length of the material sample, increase the stability of clamping the material sample, prevent the material sample from shaking during measurement, and ensure the accuracy of the measurement result.

[0025] The mold base is formed by the mutual engagement of a male mold 1 and a female mold 3. A guide rod 2 is fixed to the end of the male mold 1 facing the female mold 3, and a guide hole 15 is provided on the female mold 3. The position and size of the guide hole 15 match the guide rod 2, allowing the guide rod 2 to smoothly embed into the guide hole 15, thereby achieving a stable sliding connection. Both the guide rod 2 and the guide hole 15 are centrally located, and the guide hole 15 penetrates through the mold body of the female mold 3 to ensure that the guide rod 2 can be fully embedded within it. To ensure the tightness of the connection between the male mold 1 and the female mold 3, an internal threaded hole communicating with the guide hole 15 is provided on one side of the female mold 3, and an adjusting bolt is screwed into the internal threaded hole. By rotating the adjusting bolt, the degree of pressure on the guide rod 2 can be adjusted, thereby achieving the position adjustment of the male mold 1.

[0026] Because the male mold 1 and the female mold 3 are slidably connected by the guide rod 2 and the guide hole 15, the user can flexibly adjust the clamping distance between them according to the length of the material sample to be tested. This design greatly improves the versatility and adaptability of the fixture, allowing the same fixture to be used for measuring samples of different lengths. The guide rod 2 and the guide hole 15 constitute a guiding system, effectively reducing the swaying and offset of the male mold 1 and the female mold 3 during relative movement, thereby improving the clamping stability of the material sample.

[0027] A vertical plate is welded to the end of the male mold 1 furthest from the female mold 3. A dovetail groove 13 is cut into the middle of the upper surface of the male mold 1, extending from the inside of the vertical plate to the other end of the male mold 1. A dovetail block 16 is provided in the middle of the lower surface of the support plate 4, and the dovetail block 16 is embedded in the dovetail groove 13 to achieve a sliding connection. The design of the female mold 3 in this part is consistent with that of the male mold 1, and they are arranged symmetrically.

[0028] The upper surface of the male mold 1 has rectangular grooves 7 on both sides. The grooves 7 do not completely penetrate the male mold 1 and are located on both sides of the dovetail groove 13. The lower surface of the support plate 5 has two sets of symmetrically arranged vertical plates 10. The vertical plates 10 are embedded in the corresponding grooves 7 to realize the vertical and horizontal movement adjustment of the support plate 5. The length of the groove 7 is greater than the length of the vertical plate 10, ensuring that the vertical plate 10 has sufficient horizontal movement space within the groove 7. The width of the groove 7 is consistent with the thickness of the vertical plate 10, ensuring that the vertical plate 10 can be tightly and stably embedded in the groove 7. The depth of the groove 7 is greater than the height of the vertical plate 10, ensuring that the vertical plate 10 has sufficient vertical movement space within the groove 7. Both sides of the male mold 1 have threaded holes 8 that connect to the grooves 7. Bolts 9 are screwed into the threaded holes 8 to abut against the vertical plates 10. When the vertical plate 10 is embedded in the groove 7 and moved to the desired position, the bolts 9 can be rotated to abut against the vertical plate 10, thereby locking the position of the support plate 5. The design of the female mold 3 is the same as that of the male mold 1 in the above-mentioned parts, and they are arranged symmetrically.

[0029] The upper surface of the support plate 5 is provided with a V-shaped groove 11, and the joint between the V-shaped groove 11 and the upper surface of the support plate 5 is chamfered. The upper surface of the tray 4 is provided with a V-shaped groove 12, and the joint between the V-shaped groove 12 and the upper surface of the tray 4 is chamfered. The design of the V-shaped grooves provides a stable support surface for the cylindrical sample, reducing the shaking and displacement of the sample during the test. The V-shaped groove 12 and the V-shaped groove 11 are on the same central axis, ensuring the consistency of the sample test position.

[0030] The measuring mechanism 6 consists of two sets, which are slidably mounted on one side of the upper surface of the male mold 1 and the female mold 3, respectively. A dovetail groove 14 is formed on one side of the upper surface of the male mold 1, extending from the inside of the vertical plate to the other end of the male mold 1. The design of the female mold 3 in this part is consistent with that of the male mold 1, and the two are arranged symmetrically. The measuring mechanism 6 includes a slider 18 and a measuring rod 21. A dovetail block 17 is provided on the lower surface of the slider 18, and the dovetail block 17 is embedded in the dovetail groove 14 to achieve a sliding connection. A vertical rod 19 is provided on the upper surface of the slider 18, and a rectangular block 20 is slidably connected to the vertical rod 19. A locking bolt is screwed onto one side of the rectangular block 20 to abut against the vertical rod 19, thereby adjusting the position of the rectangular block 20. One end of the rectangular block 20 is provided with a ball socket 23, and one end of the measuring rod 21 is provided with a ball head 22 that is adapted to the ball socket 23. The ball head 22 is embedded in the ball socket 23 to achieve a rotatable connection, and the other end of the measuring rod 21 is provided with a conical tip.

[0031] The specific operating steps of this fixture are as follows (indicated by...). Figure 1 (Taking the cylindrical sample shown as an example)

[0032] 1. Insert the guide rod 2 on the male mold 1 into the guide hole 15 of the female mold 3 so that the two are in a closed state;

[0033] 2. According to the length of the material sample, move the support plate 4 on the male mold 1 and female mold 3 to the position with the larger diameter at the tail end of the material sample in sequence, and use the V-shaped groove 12 of the support plate 4 to support the material sample.

[0034] 3. Adjust the support plates 5 on the male mold 1 and female mold 3 in sequence. Adjust the two support plates 5 to a suitable height according to the diameter of the middle part of the material sample. Then tighten the bolts 9 on the sides of the two support plates 5 in sequence to adjust the overall posture of the material sample to a suitable state.

[0035] 4. Push the male mold 1 closer to the female mold 3 to clamp the material sample;

[0036] 5. After the material sample is in place, adjust the position of the slider 18, and use the conical tip of the measuring rod 21 to scribble a line on the surface of the material sample. The original length of the sample is obtained by measuring the distance between the two scribbles.

[0037] 6. After the material sample is tensilely fractured, repeat steps 2 and 3 to place the two fractured pieces of the sample into the male mold 1 and the female mold 3 respectively, push the male mold 1 closer to the female mold 3 until the two pieces of the sample are close together and spliced ​​into one piece, and measure the distance between the two scribing lines again to obtain the length of the fractured sample.

[0038] The embodiments described above are not exhaustive, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, enabling those skilled in the art to effectively utilize the invention and its modifications. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A fixture for measuring tensile specimens, characterized in that: The mold base includes a mold base and a measuring mechanism (6). The mold base is formed by slidingly engaging a male mold (1) and a female mold (3). The upper surfaces of the male mold (1) and the female mold (3) are slidably connected to a support plate (4). One end of the upper surface of the male mold (1) and the female mold (3) is slidably connected to a support plate (5). The support plate (5) and the support plate (4) are on the same central axis. The measuring mechanism (6) is provided in two sets. The two sets of measuring mechanisms (6) are slidably installed on one side of the upper surface of the male mold (1) and the female mold (3).

2. The fixture for measuring tensile specimens according to claim 1, characterized in that: The measuring mechanism (6) includes a slider (18) and a measuring rod (21). The upper surface of the male mold (1) and the female mold (3) are provided with a dovetail groove (14) on one side. The lower surface of the slider (18) is provided with a dovetail block (17) that is adapted to the dovetail groove (14). The upper surface of the slider (18) is provided with a vertical rod (19). A rectangular block (20) is slidably connected to the vertical rod (19). One end of the measuring rod (21) is rotatably connected to the rectangular block (20). The other end of the measuring rod (21) is provided with a conical tip.

3. The fixture for measuring tensile specimens according to claim 2, characterized in that: One end of the rectangular block (20) is provided with a ball socket (23), and one end of the measuring rod (21) is provided with a ball head (22) adapted to the ball socket (23), and the ball head (22) is embedded in the ball socket (23).

4. The fixture for measuring tensile specimens according to claim 1, characterized in that: The upper surface of both the male mold (1) and the female mold (3) is provided with a dovetail groove (13), and the lower surface of the support plate (4) is provided with a dovetail block (16) that is adapted to the dovetail groove (13).

5. The fixture for measuring tensile specimens according to claim 4, characterized in that: The upper surfaces of the male mold (1) and the female mold (3) are provided with two sets of grooves (7), which are respectively placed on both sides of the dovetail groove (13). The lower surfaces of the support plate (5) are provided with vertical plates (10), which are embedded in the corresponding grooves (7). The female mold (3) is provided with threaded holes (8) that connect the grooves (7) on both sides, and bolts (9) that abut against the vertical plates (10) are screwed into the threaded holes (8).

6. The fixture for measuring tensile specimens according to claim 4 or 5, characterized in that: The upper surface of the support plate (5) is provided with a V-shaped groove one (11), and the upper surface of the tray (4) is provided with a V-shaped groove two (12). The V-shaped groove two (12) and the V-shaped groove one (11) are on the same central axis.

7. The fixture for measuring tensile specimens according to claim 1, characterized in that: The male mold (1) is provided with a guide rod (2) at one end facing the female mold (3), and the female mold (3) is provided with a guide hole (15) at one end, and the guide rod (2) is embedded in the guide hole (15).

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