Split type clamp for testing double shear strength of standard component

Abstract

The invention discloses a split type standard component double-shear strength test clamp, belongs to the technical field of standard component mechanical property test equipment, and solves the problems that in the shearing test process of a traditional bolt type standard component, a lower shear of a double-shear test clamp is integrally designed, a bolt is pressed into the lower shear in the mechanical test process, and the mechanical property of the bolt is influenced. The problems that the lower scissors bear internal pressure, the scissors are prone to splitting, and the damaged bolt is clamped into the lower scissors are solved. The scissors comprise a base, a lower scissor I, a lower scissor II and an upper scissor, wherein the lower scissor I and the lower scissor II are split; the lower scissors are installed in the base through the limiting groove, and a limiting opening of the limiting groove can prevent the lower scissors from shifting. The lower scissors are provided with a first shearing hole, and the upper scissors are provided with a second shearing hole coaxially corresponding to the first shearing hole. The device has the advantages that clamping is reliable, operation is convenient, no standard part is clamped after standard part detection is completed, the situation that integrated lower scissors are broken is avoided, operation is efficient, and the detection cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of standard part mechanical property testing equipment, and particularly relates to a split type standard part double shear strength testing clamp. BACKGROUND

[0002] In the production and quality inspection process of standard parts, double shear strength testing is a key link for evaluating the shear resistance performance, and needs to be completed through a special clamp in cooperation with a mechanical property testing machine. In the conventional shear testing process of bolt type standard parts, the lower shear cutter of the double shear testing clamp is designed in an integrated manner. In the mechanical testing process, the bolt is pressed into the lower shear cutter, so that the lower shear cutter bears internal pressure, the shear cutter is prone to splitting, and the damaged bolt is difficult to take out, which affects subsequent detection. SUMMARY

[0003] In view of one or more of the above defects or improvement needs of the prior art, the present application provides a split type standard part double shear strength testing clamp, which has the advantages of reliable clamping, convenient operation, no standard part jamming after standard part detection, avoidance of the splitting of the integrated lower shear cutter, efficient operation, reduced detection cost and the like.

[0004] To achieve the above-mentioned purpose, the present application provides a split type standard part double shear strength testing clamp, which comprises a base, a lower shear cutter one, a lower shear cutter two and an upper shear cutter. The lower shear cutter one and the lower shear cutter two are installed in the base through a limiting groove, and the lower shear cutter one and the lower shear cutter two are split type structures, which are used to avoid splitting of the lower shear cutter due to internal stress concentration in the testing process of the standard part to be tested.

[0005] As a preferred technical solution, the limiting groove comprises a slot opening through the middle part of the base, and limiting openings are respectively arranged on both sides of the base and communicated with the slot.

[0006] As a preferred technical solution, the shape of the limiting opening is matched with the shape of the bottom of the lower shear cutter one and the lower shear cutter two, the limiting opening limits the bottom of the lower shear cutter one and the lower shear cutter two, and prevents position deviation in the testing process.

[0007] As a preferred technical solution, the lower shear cutter one and the lower shear cutter two are completely identical in structure and size, and are symmetrically distributed in the limiting groove of the base.

[0008] Preferably, the diameters of the shear holes one and two match the diameter of the standard part to be tested, so as to precisely hold the standard part to be tested.

[0009] Preferably, the top of the base is further provided with an arc-shaped groove located on one side or both sides of the limiting groove, for placing the standard part to be tested.

[0010] Compared with the prior art, the above technical solutions of the present application have the following beneficial effects: The split standard part double-shear strength test fixture effectively disperses the force generated by the standard part to be tested on the lower shear during the test, solves the problem of easy splitting of the traditional integrated lower shear due to internal stress concentration, prolongs the service life of the fixture and reduces the replacement cost. Meanwhile, the coaxial shear hole one and shear hole two cooperate with the positioning effect of the limiting groove, realize precise and stable holding of the standard part to be tested, avoid position deviation during the test, and significantly improve the accuracy of the double-shear strength test result. In addition, after the installation of the standard part to be tested, no adjustment is required, the operation is simple, no other auxiliary action is required, and after the detection is completed, the part is directly removed to realize the replacement of the sample to be tested, thereby improving the efficiency and operation convenience of the standard part double-shear strength test. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a schematic view of the overall structure of the present application; Figure 2 is a front view of the present application; Figure 3 is a schematic view of the lower shear after installation; Figure 4 is a schematic view of the assembly of each component of the present application.

[0012] The meanings of the labels in the drawings are as follows: 1, base; 2, lower shear one; 3, lower shear two; 4, upper shear; 5, limiting groove; 501, slot; 502, limiting port; 6, shear hole one; 7, shear hole two; 8, arc-shaped groove DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0014] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the terms "comprises", "comprising", "includes", "including" and the like are specifically intended to be open-ended and to mean that other features can be added thereto.

[0015] All terms used herein, including technical and scientific terms, have the meanings commonly understood by one of ordinary skill in the art, unless otherwise defined. It should be noted that the terms used herein are defined as having meanings that are consistent with the context of the specification, and should not be interpreted in an idealized or overly formal way.

[0016] In the embodiments, the lower shear scissors one and the lower shear scissors two are Figures 1-4 The application provides a split standard double-shear strength test clamp, which comprises a base 1, a lower shear scissors one 2, a lower shear scissors two 3 and an upper shear scissors 4; the lower shear scissors one 2 and the lower shear scissors two 3 are installed in the base 1 through limiting grooves 5, and the lower shear scissors one 2 and the lower shear scissors two 3 are split structures, which are used for avoiding splitting of the lower shear scissors due to internal stress concentration in a standard test process. The lower shear scissors one 2 and the lower shear scissors two 3 are provided with shear holes one 6 for placing a standard to be tested, the upper shear scissors 4 is provided with shear holes two 7 coaxially corresponding to the shear holes one 6, and the shear holes one 6 and the shear holes two 7 cooperate to form a clamping space, so that the standard to be tested is stably positioned, and a mechanical property testing machine is used to complete double-shear strength test.

[0017] The limiting groove 5 comprises a slot opening 501 provided in the middle of the base 1, and limiting openings 502 are provided in the bottoms on both sides of the slot opening 501 and in communication with the slot opening 501, so as to limit the lower shear scissors one 2 and the lower shear scissors two 3.

[0018] The limiting openings 502 are adapted to the shapes of the bottoms of the lower shear scissors one 2 and the lower shear scissors two 3, and the limiting openings 502 limit the bottoms of the lower shear scissors one 2 and the lower shear scissors two 3, so as to prevent position deviation in the test process.

[0019] The lower shear scissors one 2 and the lower shear scissors two 3 are completely the same in structure and size and are symmetrically distributed in the limiting groove 5 of the base 1.

[0020] The diameters of the shear holes one 6 and the shear holes two 7 are matched with the diameter of the standard to be tested, so as to realize accurate clamping of the standard to be tested.

[0021] The base 1 is further provided with an arc-shaped groove 8 on the top, and the arc-shaped groove 8 is located on one side or both sides of the limiting groove 5 and is used for placing the standard to be tested.

[0022] The use method of the application is as follows: In use of the split type standard piece double shear strength test fixture, firstly, the lower shear one 2 and the lower shear two 3 are respectively embedded into the two side limiting openings 502 of the limiting groove 5, to ensure that the two lower shear bottoms are tightly fitted with the limiting openings 502, and the fixture basic assembly is completed; then, the standard piece to be tested is placed on the shear hole one 6 on the lower shear one 2 and the lower shear two 3, the two ends of the standard piece to be tested are placed on the arc-shaped groove 8, the shear hole two 7 of the upper shear 4 is aligned with the top of the standard piece to be tested and fitted, to ensure that the shear hole one 6 and the shear hole two 7 are coaxial, and the stable and accurate clamping of the standard piece to be tested is realized; then, the assembled whole fixture is fixed on the workbench of the mechanical property testing machine, the testing machine is started, the upper shear 4 is pressed downward under the driving force of the testing machine, the double shear strength test of the standard piece to be tested is carried out, until the standard piece is sheared and broken, at this time, the test data fed back by the testing machine is recorded, and after the test is completed, the broken standard piece is taken off.

[0023] In summary, the split type standard piece double shear strength test fixture effectively disperses the force generated by the standard piece to be tested on the lower shear during the test, solves the problem that the traditional integrated lower shear is easily split due to internal stress concentration, prolongs the service life of the fixture and reduces the replacement cost; at the same time, the coaxial shear hole one and the shear hole two cooperate with the positioning effect of the limiting groove, realize the accurate and stable clamping of the standard piece to be tested, avoid the position deviation during the test, and significantly improve the accuracy of the double shear strength test result; in addition, after the standard piece to be tested is installed, it does not need to be adjusted, the operation is simple, there is no other auxiliary action, after the detection is completed, the part is directly taken off to realize the replacement of the sample to be tested, and the efficiency and operation convenience of the standard piece double shear strength test are improved as a whole.

[0024] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A split standard double shear strength test fixture, comprising: Including base (1), lower scissors one (2), lower scissors two (3) and upper scissors (4);The lower scissors one (2), lower scissors two (3) are installed in the base (1) through the limiting groove (5), and the lower scissors one (2), lower scissors two (3) are split type structure, to avoid the lower scissors in the process of testing the standard piece to be measured and the internal stress concentration produce splitting; The lower scissors one (2), lower scissors two (3) are all provided with the shearing hole one (6) for placing the standard piece to be measured, the upper scissors (4) is provided with the shearing hole two (7) corresponding with the shearing hole one (6), the shearing hole one (6) and shearing hole two (7) form the clamping space, so that the standard piece to be measured is stably positioned, and the mechanical property testing machine is completed double shear strength test.

2. The split standard double shear strength test fixture of claim 1, wherein, The limiting groove (5) includes the slot (501) through the opening in the middle part of the base (1), and the slot (501) is provided with the limiting opening (502) on both sides of the bottom and communicated with the slot (501).

3. A split standard double shear strength test fixture as claimed in claim 2, wherein, The shape of the limiting opening (502) is matched with the shape of the bottom of the lower scissors one (2) and the lower scissors two (3), the limiting opening (502) is limited to the bottom of the lower scissors one (2) and the lower scissors two (3), to prevent the position deviation in the testing process.

4. The split standard double shear strength test fixture of claim 1, wherein, The structure and size of the lower scissors one (2) and the lower scissors two (3) are completely same, and symmetrically distributed in the limiting groove (5) of the base (1).

5. The split standard double shear strength test fixture of claim 1, wherein, The diameter of the shearing hole one (6) and the shearing hole two (7) is matched with the diameter of the standard piece to be measured, to realize the accurate clamping of the standard piece to be measured.

6. The split standard double shear strength test fixture of claim 1, wherein, The top of the base (1) is also provided with an arc-shaped groove (8), and the arc-shaped groove (8) is located on one side or both sides of the limiting groove (5), for placing the standard piece to be tested.

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