Clamp for tension test of OD type crimping terminal

Abstract

The utility model relates to the technical field of workpiece detection equipment, in particular to a clamp for tension test of an OD type crimping terminal, which comprises a clamping rod, a structural frame and a compass, the structural frame is of a U-shaped structure, the closed end of the structural frame is connected with the clamping rod, the compass is rotatably arranged in the open end of the structural frame through a rotating shaft, and the compass is connected with the clamping rod. A plurality of cylindrical pin holes with different hole diameters are formed in the compass, and cylindrical pins with corresponding sizes are arranged in the cylindrical pin holes. The cylindrical pins with different specifications are fixed through the compass, so that the clamping times of the clamp and the equipment adjusting frequency are greatly reduced, and the working time is saved; and the compass can rotate to select a proper cylindrical pin for testing the OD type crimping terminal, so that the test operation is more convenient, and the limitation of the prior art is made up.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece detection equipment, in particular to a clamp for OD type crimping terminal tension test. Background Art

[0002] OD type crimping terminals are standard parts produced in accordance with GJB2647. OD type crimping terminals have been widely used in the field of aviation cable and electrical equipment. During the final assembly of the aircraft, the electrical connections of various instruments and meters require the connection of crimping terminals, so the quality of crimping terminals directly affects the quality of the aircraft. Crimping terminals are generally mass-produced, so before the crimping terminal parts are applied to the final assembly of the aircraft, the crimping terminals need to be physically and chemically tested, and auxiliary tooling is required when testing the crimping terminals. At present, when performing tensile tests on OD type terminals, physical and chemical laboratories generally use a single fixture, and each specification of OD type terminal uses a fixture. The number of disassembly and assembly is too frequent, which is inefficient, and each clamping of the fixture will produce clamping errors, which directly affects the accuracy of the experimental data. Utility Model Content

[0003] Technical problem solved by the utility model: The utility model is to make up for the deficiencies of the prior art and improve the test accuracy, and provides a fixture that can detect OD-type crimping terminals of various specifications at one time.

[0004] The technical solution of this utility model:

[0005] A clamp for OD type crimping terminal tensile test comprises a clamping rod, a structural frame and a compass. The structural frame is a U-shaped structure. The closed end of the structural frame is connected to the clamping rod. The compass is rotatably arranged in the open end of the structural frame through a rotating shaft. The compass is provided with a plurality of cylindrical pin holes with different apertures. Cylindrical pins of corresponding sizes are arranged in the cylindrical pin holes.

[0006] Furthermore, the compass is provided with a center hole, the rotating shaft is interference-fittedly arranged in the center hole, and both ends of the rotating shaft are rotatably connected to the inner walls on both sides of the opening end of the structural frame, and can drive the compass to rotate synchronously.

[0007] Furthermore, the compass is clearance-matched with the inner wall surface of the opening end of the structural frame.

[0008] Furthermore, the matching clearance between the compass and the inner wall surface of the opening end of the structural frame is within the range of ±0.03mm.

[0009] Furthermore, the clamping rod is connected to an upper clamp of the test equipment.

[0010] Furthermore, the clamping rod is interference-connected with the closed end of the structural frame.

[0011] Furthermore, the clamping rod, the structural frame and the compass are all made by processing 30GrMnSiA.

[0012] Beneficial effects of the utility model:

[0013] Compared with the prior art, the OD type crimp terminal tensile test fixture has the following beneficial effects:

[0014] 1. The utility model fixes cylindrical pins of different specifications through a compass, which greatly reduces the number of fixture clamping times and equipment adjustment frequency, saves working time, and the compass can be rotated to select a suitable cylindrical pin for OD type crimping terminal testing, making the test operation more convenient and making up for the limitations of the existing technology.

[0015] 2. The utility model perfectly solves the problem that the OD type crimping terminal always keeps itself on the same horizontal line with the two detection devices when subjected to tension, through the strict tolerance matching relationship between the clamping rod, the structural frame, the compass and the rotating shaft, thus greatly avoiding the occurrence of cross-cutting force and ensuring the accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 Cross-sectional view along AA direction;

[0018] Figure 3 It is a schematic diagram of the use of the utility model;

[0019] Figure 4 It is a schematic diagram of the structural frame structure;

[0020] Figure 5 It is a side view of the compass;

[0021] Figure 6 It is a compass top view;

[0022] Figure 7 is a schematic diagram of the clamping rod structure;

[0023] Figure 8 This is a schematic diagram of an OD type crimp terminal;

[0024] Among them, 1. clamping rod, 2. structural frame, 3. compass. DETAILED DESCRIPTION

[0025] In order to more clearly understand the purpose, technical solutions and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] The utility model provides a clamp for OD type crimping terminal tensile test, comprising a clamping rod 1, a structural frame 2, a compass 3, a rotating shaft, and 8 cylindrical pins of different specifications; wherein 8 refined holes are evenly distributed on the edge 3 of the compass for pressing the cylindrical pins of 8 specifications; the 8 cylindrical pins are connected with the connecting holes of OD type crimping terminals of different specifications, such as Figure 8 The D hole shown is fixed on the outer circle of the cylindrical pin. The hole bored in the center of the compass 3 is used to penetrate and connect the structural frame 2 and the compass 3. The compass 3 is processed as a whole and rotates with a rotating shaft. The matching clearance between the upper and lower surfaces and the inner walls of the two sides of the structural frame 2 is within ±0.03mm, so as to avoid up and down deviations as much as possible during rotation. The structural frame 2 adopts a U-shaped structure, firstly to protect the compass 3 from tilting and deviation, and secondly to ensure that no resistance is generated when the compass 3 rotates.

[0027] When conducting a tensile test on an OD-type crimping terminal, first adjust the test equipment to a horizontal state, then quickly install the clamping rod 1 of the crimping fixture on the upper fixture of the test equipment, select the corresponding cylindrical pin for the OD-type crimping terminal and fix it on the compass 3, fix the other end of the OD-type crimping terminal on the lower fixture of the test equipment, adjust the upper and lower fixtures of the test equipment to the same vertical state, adjust the stroke, and then start the test. Due to the rotation of the compass 3 and the gravity of the OD-type crimping terminal itself, the OD-type crimping terminal will be in a vertical state after being stressed, eliminating external forces in other directions, and ensuring the accuracy of the test to a great extent. At the same time, the structural frame 2 will protect the compass 3 from a skew greater than 0.03 mm when the crimping terminal is subjected to uneven stress, thereby compensating for the long-term uneven stress state of the crimping terminal and damaging the test equipment and personnel safety.

[0028] After testing a crimping terminal of one specification, it is necessary to switch to another specification of crimping terminal, find the corresponding cylindrical pin, and then fix the crimping terminal on the compass 3 through the corresponding cylindrical pin; the above test steps can be implemented without going through the complicated fixture disassembly and assembly process, and without going through the upper and lower fixture alignment and adjustment process of the test equipment. The cylindrical pin on the fixture compass 3 basically meets the clamping requirements of all OD type crimping terminals.

[0029] When not in operation, the crimping terminal only needs to be taken down, and then the clamping rod 1 is quickly removed from the test equipment. The clamp has simple assembly and disassembly steps and high operating efficiency.

Claims

1. A clamp for OD type crimp terminal tensile test, characterized in that: It includes a clamping rod, a structural frame, and a compass. The structural frame is a U-shaped structure. The closed end of the structural frame is connected to the clamping rod. The compass is rotatably arranged in the open end of the structural frame through a rotating shaft. The compass is provided with a plurality of cylindrical pin holes with different apertures, and cylindrical pins of corresponding sizes are arranged in the cylindrical pin holes.

2. A clamp for tensile testing of OD type crimp terminals according to claim 1, characterized in that: The compass is provided with a central hole, the rotating shaft is interference-set in the central hole, and both ends of the rotating shaft are rotatably connected to the inner walls on both sides of the opening end of the structural frame, and can drive the compass to rotate synchronously.

3. A clamp for tensile testing of OD type crimp terminals according to claim 1, characterized in that: The compass is clearance-matched with the inner wall surface of the opening end of the structural frame.

4. A clamp for tensile testing of OD type crimp terminals according to claim 3, characterized in that: The matching clearance between the compass and the inner wall surface of the opening end of the structural frame is within the range of ±0.03mm.

5. The OD type crimp terminal tensile test fixture according to claim 1, characterized in that: The clamping rod is connected to the upper clamp of the test equipment.

6. A clamp for tensile testing of OD type crimp terminals according to claim 1, characterized in that: The clamping rod is interference connected with the closed end of the structural frame.

7. A clamp for tensile testing of OD type crimp terminals according to claim 1, characterized in that: The clamping rod, structural frame and compass are all made by processing 30GrMnSiA.

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