Device for centering plate-shaped tensile sample clamped by universal electronic testing machine

Abstract

The utility model relates to a device for clamping a plate-shaped tensile sample for centering by a universal electronic testing machine, and belongs to the field of centering equipment of testing machines. The structure comprises a supporting rod (1) and a sliding rod (3), the supporting rod (1) can be erected on a main machine of the tensile testing machine, the lower end of the sliding rod (3) is arranged on the supporting rod (1) in a sleeving mode and can be fixed to the supporting rod (1), at least two positioning rulers (5) are arranged on the upper portion of the sliding rod (3) in a penetrating mode, and the positioning rulers (5) can be fixed to the sliding rod (3). According to the structure, the positioning ruler (5) is adjusted to directly act on the middle parallel part of the sample (6) for positioning, the coaxiality error caused by the machining precision of the clamping end and the middle parallel part is reduced, the applicability is extremely high, and the requirement for the accuracy of test data in the test process is met. The problems that when an existing plate-shaped sample is stretched, deviation of parallelism and coaxiality between the clamped sample and the axial direction of a testing machine is prone to occurring, and errors are caused to a test result are solved.

Description

Technical Field

[0001] This utility model relates to a device for centering a plate-shaped tensile specimen in a universal electronic testing machine, belonging to the field of centering equipment for testing machines. Background Technology

[0002] Electronic universal testing machines are devices used to test the strength of metallic materials and are widely used in scientific research and new material development in research institutions. This type of testing equipment is used very frequently. Currently, when performing tensile testing on plate-shaped specimens, electronic universal testing machines often lack corresponding alignment devices. This can lead to deviations in the parallelism and coaxiality of the specimens with the machine's axis, resulting in errors in the test results. Utility Model Content

[0003] The technical problem to be solved by this invention is that when existing plate-shaped specimens are stretched, the clamped specimens are prone to deviations in parallelism and coaxiality with the axis of the testing machine, which leads to errors in the test results.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a device for centering a plate-shaped tensile specimen in a universal electronic testing machine, including a support rod and a sliding rod. The support rod can be mounted on the main body of the tensile testing machine. The lower end of the sliding rod is sleeved on the support rod and can be fixed to the support rod. At least two positioning rulers are passed through the upper part of the sliding rod and can be fixed to the sliding rod.

[0005] In the above structure, a collar is provided at the lower end of the slide rod, and a locking screw is radially provided on the collar.

[0006] The support rod in the above structure is provided with scale lines.

[0007] In the above structure, the support rod is provided with bases at both ends, and the support rod is connected to the tensile testing machine main unit through the bases.

[0008] Furthermore, the support rod and the base in the above structure are connected by threads, and the base has a structure that is smaller at the top and larger at the bottom, and a connecting through hole is provided on the base.

[0009] In the above structure, the positioning end of the positioning ruler is a wedge-shaped structure.

[0010] Furthermore, the sliding end of the positioning ruler in the above structure is provided with a sliding ring, the positioning ruler is sleeved on the slide rod through the sliding ring, and a hand-tightening screw is provided on the sliding ring.

[0011] Furthermore, the positioning ruler in the above structure consists of two pieces, and the wedge-shaped structures at the positioning ends are arranged back to back.

[0012] Furthermore, the upper part of the base in the above structure is circular, and the lower part is trapezoidal, and the upper and lower parts are integrally formed.

[0013] Furthermore, the upper part of the base in the above structure is provided with a threaded hole, and both ends of the slide rod are provided with matching external threads, and the slide rod is threadedly connected to the base.

[0014] The beneficial effects of this invention are as follows: This structure, through a sliding rod device to adjust the position of the positioning ruler, ensures the parallelism and coaxiality of plate-shaped specimens of different specifications and sizes with the testing machine axis during clamping. This avoids differences in test data caused by specimen installation errors. Furthermore, the device has a simple structure, is easy to operate, has low manufacturing cost, and a long service life. During specimen clamping, the structure ensures the coaxiality and parallelism of the specimen during tensile testing through the positioning of the working surface. Simultaneously, the structure also provides a certain degree of safety protection, meeting the dual requirements of accurate test results and protection for personnel during the testing process, increasing the safety of the test, and preventing accidents. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is the right view of this utility model.

[0017] The markings in the diagram are: 1. Support rod; 11. Scale line; 2. Base; 3. Slide rod; 31. Collar; 4. Hand screw; 5. Positioning ruler; 51. Sliding ring; 6. Sample; 7. Locking screw. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figure 1 and Figure 2As shown, this utility model discloses a device for centering a plate-shaped tensile specimen in a universal electronic testing machine. The device includes a support rod 1 and a sliding rod 3. The support rod 1 can be mounted on the main body of the tensile testing machine. The lower end of the sliding rod 3 is sleeved on the support rod 1 and can be fixed to it. At least two positioning rulers 5 are inserted through the upper part of the sliding rod 3, and the positioning rulers 5 can be fixed to the sliding rod 3. Those skilled in the art will understand that in this structure, the support rod 1 is actually mounted on the main body of the tensile testing machine, and the position is determined according to the actual clamping requirements. Preferably, the support rod 1 is a hollow structure with an outer diameter of 40-50 mm, a wall thickness of 5-10 mm, and a length of 160-180 mm. The sliding rod 3 is sleeved on the support rod 1, allowing it to slide on the support rod 1 or be fixed at any position on it. Preferably, the sliding rod 3 is a hollow structure with an outer diameter of 20-30 mm, a wall thickness of 4-6 mm, and a length of 200-220 mm. The slide rod 3 is kept perpendicular to the support rod 1, allowing the slide rod 3 to slide smoothly on the support rod 1. A positioning ruler 5 is fitted onto the upper part of the slide rod 3; the positioning ruler 5 is 20–30 mm wide, 5–8 mm thick, and 150–180 mm long. This structural arrangement, through the adjustment of the position of the slide rod 3, ensures the parallelism and coaxiality of the plate-shaped specimens 6 of different sizes with the testing machine axis during clamping.

[0020] Preferably, in the above structure, the lower end of the slide rod 3 is provided with a collar 31, and a locking screw 7 is radially provided on the collar 31. Those skilled in the art will understand that, to facilitate the sliding connection between the slide rod 3 and the support rod 1, this structure preferably provides a collar 31 at the lower end of the slide rod 3, and a locking screw 7 is radially provided on the collar 31. After the slide rod 3 slides to a suitable position, tightening the locking screw 7 will fix the slide rod 3 to a suitable position on the support rod 1. The number of locking screws 7 is preferably two to ensure uniform tightening force. To guide and ensure that the slide rod 3 is perpendicular to the support rod 1 during sliding, the support rod 1 is preferably polygonal in cross-section, such as triangular, quadrilateral, pentagonal, hexagonal, octagonal, or dodecagonal, and the cross-section of the collar 31 is adapted to the cross-section of the support rod 1.

[0021] Preferably, the support rod 1 in the above structure is provided with scale lines 11. Those skilled in the art will understand that, for ease of quick installation, this structure preferably provides scale lines 11 on the support rod 1 for marking positions. In practice, a zero position, denoted as 0mm, can be set on the scale lines 11 of the support rod 1, with each smallest scale unit being 1mm and a measuring range of 40mm.

[0022] Preferably, in the above structure, the support rod 1 is provided with bases 2 at both ends, and the support rod 1 is connected to the tensile testing machine main unit through the bases 2. Those skilled in the art will understand that, for the convenience of fixing the support rod 1, this structure preferably provides bases 2 at both ends of the support rod 1, and the support rod 1 is connected to the tensile testing machine main unit through the bases 2.

[0023] Preferably, in the above structure, the support rod 1 and the base 2 are connected by a thread, and the base 2 has a structure that is smaller at the top and larger at the bottom, with a connecting through hole provided on the base 2. Those skilled in the art will understand that, in order to facilitate connection and ensure support fixation, this structure preferably uses a threaded connection between the support rod 1 and the base 2, and the base 2 has a structure that is smaller at the top and larger at the bottom, with a connecting through hole provided on the base 2, so that the base 2 is connected and fixed to the tensile testing machine main unit by bolts.

[0024] Preferably, the positioning end of the positioning ruler 5 in the above structure is a wedge-shaped structure. Those skilled in the art will understand that, for convenient and accurate positioning, the positioning end of the positioning ruler 5 is preferably a wedge-shaped structure, that is, the left end of the positioning ruler 5 or the end in contact with the sample 6 is a wedge-shaped structure.

[0025] Preferably, in the above structure, the sliding end of the positioning ruler 5 is provided with a sliding ring 51, and the positioning ruler 5 is sleeved on the slide rod 3 through the sliding ring 51, and a hand-tightening screw 4 is provided on the sliding ring 51. Those skilled in the art will understand that, for the convenience of adjusting the position of the positioning ruler 5, this structure preferably provides a sliding ring 51 at the sliding end of the positioning ruler 5, and the positioning ruler 5 is sleeved on the slide rod 3 through the sliding ring 51, and a hand-tightening screw 4 is provided on the sliding ring 51. To guide and ensure that the positioning ruler 5 is perpendicular to the slide rod 3 during sliding, the cross-section of the slide rod 3 is preferably a polygonal structure, such as a triangle, quadrilateral, pentagon, hexagon, octagon, or dodecagon, and the cross-section of the sliding ring 51 is adapted to the cross-section of the slide rod 3.

[0026] Preferably, the positioning ruler 5 in the above structure consists of two pieces, with the wedge-shaped structures at the positioning ends facing away from each other. Those skilled in the art will understand that, to ensure accurate positioning, this structure preferably consists of two positioning rulers 5, with the wedge-shaped structures at the positioning ends facing away from each other.

[0027] Preferably, in the above structure, the upper part of the base 2 is circular and the lower part is trapezoidal, and the upper and lower parts are integrally formed. Those skilled in the art will understand that, in order to ensure the supporting strength of the base 2, this structure preferably has the upper part of the base 2 being circular and the lower part being trapezoidal, and the upper and lower parts being integrally formed, while the large end face of the lower part is directly fixed to the tensile testing machine host.

[0028] Preferably, in the above structure, the upper part of the base 2 is provided with a threaded hole, and both ends of the slide rod 3 are provided with matching external threads, and the slide rod 3 is threadedly connected to the base 2. Those skilled in the art will understand that, in order to facilitate the mounting of the support rod 1 on the tensile testing machine main unit, this structure preferably has threaded holes designed on the base 2, preferably four in number, and the base 2 can be fixed to the tensile testing machine main unit using corresponding bolts and screw holes.

[0029] Operation procedure for this structure:

[0030] The base 2 is fixed to the main body of the tensile testing machine. The support rod 1 is threaded onto the base 2 through the threaded hole on the base 2, and the support rod 1 is marked with a numerical scale line 11.

[0031] Taking a plate-shaped sample 6 with a clamping width of 20mm as an example, first slide the slide bar 3 to the appropriate scale line 11 position of the support rod 1. The scale line 11 indicates different sample 6 sizes to meet the positioning of sample 6 with different widths. After pushing the slide bar 3 into place, fix the position by locking the screw 7.

[0032] Based on the parallel section length of the 20mm sample 6, adjust the two positioning rulers 5 to a spacing of 50mm, and tighten the hand-tightened screw 4 to complete the fixation.

[0033] Each time you clamp the sample, simply place the sample 6 directly against the positioning ruler 5 and click the clamping button on the device to easily complete the clamping of the sample 6.

Claims

1. An apparatus for centering a plate-like tensile specimen in a universal electronic testing machine gripper, characterized by: It includes a support rod (1) and a slide rod (3). The support rod (1) can be mounted on the main body of the tensile testing machine. The lower end of the slide rod (3) is sleeved on the support rod (1) and can be fixed to the support rod (1). At least two positioning rulers (5) are passed through the upper part of the slide rod (3) and the positioning rulers (5) can be fixed to the slide rod (3).

2. A device for centering a plate-like tensile specimen held by a universal electronic testing machine clamping plate according to claim 1, characterized in that: The lower end of the slide bar (3) is provided with a collar (31), and a locking screw (7) is radially provided on the collar (31).

3. A device for centering a plate-like tensile specimen held by a universal electronic testing machine clamping according to claim 1, characterized in that: The support rod (1) is provided with scale lines (11).

4. A device for centering a plate-like tensile specimen held by a universal electronic testing machine clamping according to claim 1, characterized in that: The support rod (1) is provided with bases (2) at both ends, and the support rod (1) is connected to the main body of the tensile testing machine through the bases (2).

5. A device for centering a plate-like tensile specimen held by a universal electronic testing machine clamping plate according to claim 4, characterized in that: The support rod (1) and the base (2) are connected by threads, and the base (2) has a structure that is smaller at the top and larger at the bottom, and a connecting through hole is provided on the base (2).

6. The device for clamping and centering a plate-shaped tensile specimen in a universal electronic testing machine according to claim 1, characterized in that: The positioning end of the positioning ruler (5) is a wedge-shaped structure.

7. A device for centering a plate-like tensile specimen held by a universal electronic testing machine clamping plate according to claim 6, characterized in that: The sliding end of the positioning ruler (5) is provided with a sliding ring (51), and the positioning ruler (5) is sleeved on the slide rod (3) through the sliding ring (51), and a hand-tightening screw (4) is provided on the sliding ring (51).

8. A device for centering a plate-like tensile specimen held by a universal electronic testing machine clamping plate according to claim 6, characterized in that: The positioning ruler (5) consists of two pieces, with the wedge-shaped structures at the positioning ends facing each other.

9. A device for centering a plate-like tensile specimen held by a universal electronic testing machine clamping plate as defined in claim 4, characterized in that: The base (2) has a circular upper part and a trapezoidal lower part, and the upper and lower parts are integrally formed.

10. A device for centering a plate-like tensile specimen held by a universal electronic testing machine clamping plate as defined in claim 4, characterized in that: The connecting through hole on the base (2) is a threaded hole, and the slide rod (3) is provided with matching external threads at both ends, and the slide rod (3) is threadedly connected to the base (2).

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