Special testing fixture for fatigue test of hot-melting self-tapping screw

Abstract

The utility model discloses a special detection tool for fatigue test of a hot-melting self-tapping screw, and belongs to the field of detection equipment of hot-melting self-tapping screw products. According to the special gauge, a fixed assembly and a movable assembly are arranged on a workbench of a rack, and a first connector is arranged on the fixed assembly; the movable assembly is provided with a second connector, and the second connector is also connected with a fatigue test unit; the testing assembly comprises a third connector and a fourth connector, the third connector is connected with the first connector in a matched mode, and the fourth connector is connected with the second connector in a matched mode; the third connector and the fourth connector are respectively provided with a clamping unit, each clamping unit is connected with a test board, and the two test boards are connected through a hot melting self-tapping screw to be tested. Through the ingenious design, the shearing force and the axial force are detected by one set of equipment, the qualification judgment is carried out, the stability of a product is improved, and a reliable guarantee is provided for subsequent installation.

Description

TECHNICAL FIELD

[0001] The utility model relates to the processing detection equipment field of hot melt self tapping screw, especially relates to a special gauge for hot melt self tapping screw fatigue test. BACKGROUND

[0002] With the sustained growth of new energy vehicles, the sealing performance requirements of new energy vehicle battery packs are more and more strict, and the sealing performance requirements of fasteners connected after connecting the battery pack are also more and more high.

[0003] Hot melt self tapping screws are widely used in the installation of battery packs. The design of new energy battery boxes needs to consider the influence of vibration on the structure, and the vibration conditions are divided into random vibration and fixed frequency vibration according to GB 38031-2020 description. The influence of vibration on hot melt self tapping screws needs to be verified through test, and whether it is qualified or not is determined.

[0004] At present, there is a lack of a simple and reliable test equipment in the test equipment. UTILITY MODEL CONTENT

[0005] In order to solve the above technical problems, the utility model provides a special gauge for hot melt self tapping screw fatigue test.

[0006] The technical scheme of the utility model is: a special gauge for hot melt self tapping screw fatigue test, comprising:

[0007] A rack, a fixed component and a movable component are arranged on the workbench of the rack,

[0008] The fixed component is fixedly arranged on the workbench, and a first connecting head is arranged on the fixed component;

[0009] The movable component is movably arranged on the workbench, and a second connecting head is arranged on the movable component, and the second connecting head is further connected with a fatigue test unit;

[0010] The test component comprises a third connecting head and a fourth connecting head, the third connecting head is connected with the first connecting head in cooperation, and the fourth connecting head is connected with the second connecting head in cooperation;

[0011] A clamping unit is arranged on the third connecting head and the fourth connecting head respectively, each clamping unit is connected with a test plate, and the two test plates are connected through the hot melt self tapping screw to be tested.

[0012] Further, the movable component comprises a moving unit, the moving unit is arranged on the workbench, and the moving unit drives the second connecting head to move. Generally, the moving unit can be single direction movement, such as linear module, air cylinder, electric cylinder, screw rod assembly and the like; it can also be set as three-dimensional movement, and the commonly used mechanical hand, linear module arranged in three axes and the like can be used.

[0013] Further, the fatigue test unit comprises a fatigue tester. That is, by setting the fatigue tester, the test can be carried out under the condition of fixed tension or adjustable tension.

[0014] Further, the fatigue test unit further comprises a timer. By the timer, the test time can be clearly known, and the stability of the test can be improved.

[0015] Further, when the hot melt self tapping screw to be tested is perpendicular to the workbench, the two test plates are arranged at an angle. In this case, the tensile capacity of the hot melt self tapping screw can be tested.

[0016] Further, the two test plates are arranged vertically. In the vertical state, the test is facilitated.

[0017] Further, the clamping unit comprises:

[0018] a clamping base plate, one side of the clamping base plate is provided with a third connecting head or a fourth connecting head; the other side of the clamping base plate is provided with a clamping groove, and the test plate is arranged in the clamping groove; and

[0019] a clamping fixed plate, which is fixed on both sides of the clamping groove by screws.

[0020] Further, the clamping fixed plate is provided with two clamping fixed plates, which are respectively located at both ends of the clamping groove. The stable existence of the test plate is ensured.

[0021] Further, the clamping groove is further provided with a clearance groove, which cooperates with the hot melt self tapping screw. That is, the protruding part of the hot melt self tapping screw can be arranged in the clearance groove, so as to realize the stability of the test.

[0022] Further, when the hot melt self tapping screw to be tested is parallel to the workbench, the two test plates are arranged in parallel or along the vertical direction. At this time, the shear resistance of the hot melt self tapping screw can be tested, that is, whether the hot melt self tapping screw will be cut off when there is a tension perpendicular to the hot melt self tapping screw, and whether it is qualified is determined; It should be noted that when the shear force is large enough, any screw or test will be cut off, and the standard of qualified test will be different according to the application scene of the screw. This tooling can determine whether it is qualified after a certain tension and a certain time.

[0023] Further, the clamping unit further comprises:

[0024] a clamping connecting plate, one side of the clamping connecting plate is provided with a third connecting head or a fourth connecting head, and the other side of the clamping connecting plate is provided with a clamping vertical plate; and

[0025] The clamping vertical plate is provided with clamping connection holes, and clamping connection pins are installed in the clamping connection holes. A test plate along the vertical direction is installed on the clamping connection pins. At this time, the shear resistance of the hot-melt self-tapping screws along the vertical direction can be tested.

[0026] Furthermore, at least two clamping connecting pins are provided. The use of multiple clamping connecting pins ensures the stability of the connection. Moreover, they can be arranged horizontally or vertically, depending on actual needs.

[0027] Furthermore, it also includes a clamping auxiliary plate, which is arranged parallel to the clamping vertical plate, with the test plate located between the clamping auxiliary plate and the clamping vertical plate. The clamping connecting pin passes through both the clamping auxiliary plate and the clamping vertical plate, thus ensuring the stability of the test plate.

[0028] Furthermore, the clamping connecting plate is provided with an oblong hole, and a screw is used to connect it to the clamping vertical plate within the oblong hole. The oblong hole allows for adjustment of the test plate's position, facilitating more stable testing.

[0029] Furthermore, two oblong holes are provided to ensure a stable connection.

[0030] The beneficial technical effects of this utility model are: through ingenious design, a set of equipment is realized to detect shear force and axial force and make a qualification judgment, which improves the stability of the product and provides a reliable guarantee for subsequent installation. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of a special fixture for fatigue testing of hot melt self-tapping screws.

[0032] Figure 2 This is a three-dimensional schematic diagram for testing shear force.

[0033] Figure 3 yes Figure 2 A magnified view of a portion of the image.

[0034] Figure 4 This is a schematic diagram of the clamping connection hole.

[0035] Figure 5 This is a schematic diagram for testing shear force.

[0036] Figure 6 This is a schematic diagram for testing axial force.

[0037] Figure 7 yes Figure 6 A sectional view.

[0038] Figure 8 This is a diagram illustrating the clamping of the substrate.

[0039] in:

[0040] 1, rack, 2, fixed assembly, 3, movable assembly, 4, first connecting head, 5, second connecting head, 6, third connecting head, 7, fourth connecting head,

[0041] 8, clamping unit, 811, clamping base plate, 812, clamping groove, 813, clamping fixed plate, 814, clearance groove, 821, clamping connecting plate, 822, clamping vertical plate, 823, clamping connecting hole, 824, clamping connecting pin, 825, clamping auxiliary plate, 826, waist type hole,

[0042] 9, fatigue test unit, 10, test plate. DETAILED DESCRIPTION

[0043] In order to make the technical means of the utility model more clearly understood, and can be implemented according to the content of the specification, the specific embodiments of the utility model are further described in detail below, the following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0044] Referring to the special gauge for hot melt self tapping screw fatigue test shown in the drawings, Figures 1-8 The special gauge for hot melt self tapping screw fatigue test comprises:

[0045] Rack 1, the workbench of rack 1 is provided with fixed assembly 2 and movable assembly 3,

[0046] The fixed assembly 2 is fixedly arranged on the workbench, and the first connecting head 4 is arranged on the fixed assembly 2;

[0047] The movable assembly 3 is movably arranged on the workbench, and the second connecting head 5 is arranged on the movable assembly 3, and the fatigue test unit 9 is further connected to the second connecting head 5;

[0048] The test assembly comprises third connecting head 6 and fourth connecting head 7, the third connecting head 6 is connected with the first connecting head 4 in cooperation, and the fourth connecting head 7 is connected with the second connecting head 5 in cooperation;

[0049] The clamping unit 8 is arranged on the third connecting head 6 and the fourth connecting head 7 respectively, each clamping unit 8 is connected with one test plate 10, and the hot melt self tapping screw to be tested is connected between the two test plates.

[0050] Further, the movable assembly 3 comprises a moving unit, the moving unit is arranged on the workbench, and the moving unit drives the second connecting head 5 to move. Generally, the moving unit can be single direction movement, such as linear module, air cylinder, electric cylinder, screw assembly, etc. can be set as three-dimensional movement, the commonly used mechanical hand, linear module arranged in three axes, etc. can be used.

[0051] Further, the fatigue test unit 9 comprises a fatigue tester. That is, by setting the fatigue tester, the test can be carried out under the condition of fixed tension or adjustable tension.

[0052] Further, the fatigue test unit 9 further comprises a timer. Through the timer, the test time can be clearly known, and the stability of the test can be improved.

[0053] Further, when the hot melt self tapping screw to be tested is perpendicular to the workbench, the two test plates are arranged at an angle. In this case, the tensile capacity of the hot melt self tapping screw can be tested.

[0054] Further, the two test plates are arranged vertically. In the vertical state, the test is facilitated.

[0055] Further, the clamping unit 8 comprises:

[0056] The clamping base plate 811 is provided with the third connecting head 6 or the fourth connecting head 7 on one side; the clamping base plate 811 is provided with a clamping groove 812 on the other side, and the test plate is arranged in the clamping groove 812; and

[0057] The clamping fixed plate 813 is fixed on both sides of the clamping groove 812 by screws.

[0058] Further, the clamping fixed plate 813 is provided with two clamping fixed plates 813, which are respectively located at both ends of the clamping groove 812. The stable existence of the test plate is ensured.

[0059] Further, the clamping groove 812 is further provided with a clearance groove 814, and the clearance groove 814 cooperates with the hot melt self tapping screw. That is, the protruding part of the hot melt self tapping screw can be arranged in the clearance groove 814, so as to realize the stability of the test.

[0060] Further, when the hot melt self tapping screw to be tested is parallel to the workbench, the two test plates are arranged in parallel or along the vertical direction. At this time, the shear resistance of the hot melt self tapping screw can be tested, that is, whether the hot melt self tapping screw will be cut off when there is a pulling force perpendicular to the hot melt self tapping screw, and whether it is qualified is determined; It should be noted that when the shear force is large enough, any screw or test will be cut off, and the qualified test standard will be different according to the application scene of the screw. The tool can determine whether it is qualified after a certain tension and a certain time.

[0061] Further, the clamping unit 8 further comprises:

[0062] The clamping connecting plate 821 is provided with the third connecting head 6 or the fourth connecting head 7 on one side, and the clamping vertical plate 822 is arranged on the other side of the clamping connecting plate 821; and

[0063] The clamping vertical plate 822 is provided with a clamping connecting hole 823, a clamping connecting pin 824 is arranged in the clamping connecting hole 823, and a test plate in the vertical direction is arranged on the clamping connecting pin 824. At this time, the shear resistance of the hot melt self-tapping screw in the vertical direction can be tested.

[0064] Further, the clamping connecting pin 824 is provided with at least two. Through the arrangement of multiple clamping connecting pins 824, the stability of the connection can be ensured. Moreover, it can be arranged in the horizontal or vertical direction, and the arrangement can be made according to actual needs.

[0065] Further, it further includes a clamping auxiliary plate 825, the clamping auxiliary plate 825 is arranged in parallel with the clamping vertical plate 822, and the test plate 10 is located between the clamping auxiliary plate 825 and the clamping vertical plate 822, and the clamping connecting pin 824 penetrates the clamping auxiliary plate 825 and the clamping vertical plate 822. That is, the stability of the test plate 10 is ensured.

[0066] Further, the clamping connecting plate 821 is provided with a waist-shaped hole 826, and the waist-shaped hole 826 is connected with the clamping vertical plate 822 through a screw. Through the arrangement of the waist-shaped hole 826, the position of the test plate 10 can be adjusted, and more stable testing can be realized.

[0067] Further, the waist-shaped hole 826 is provided with two. That is, the stability of the connection is ensured.

[0068] Through ingenious design, a set of equipment for detecting shear force and axial force and making qualified judgment is realized, the stability of the product is improved, and reliable guarantee is provided for subsequent installation.

[0069] Unqualified judgment: After fatigue vibration test, the screw is broken or broken, the screw is loose, and the phenomenon of elongation deformation. A large number of studies can be found on the influence of vibration on the structure of the battery box, but the number of studies on the influence of vibration on the connection of the battery box is limited, especially the influence of vibration on the air tightness is rarely found. The application of hot melt self-tapping screws on the battery box is more and more, and the air tightness under static load can be verified by test, and the actual working condition of the battery box is definitely subjected to dynamic load, and the air tightness under dynamic load needs to be verified. The vibration test is verified by high-frequency fatigue test equipment, and it needs to be considered how to convert the transverse shear force of the nail connection into the axial force of the fatigue equipment. The design of the fatigue tooling of the hot melt self-tapping screw after dynamic load is a problem to be solved.

[0070] After the hot melt self-tapping screw is detected by the tooling, the qualified one is subjected to air tightness test, and whether the hot melt self-tapping screw still has good air tightness after long-term use can be tested, which provides data reference for the service life of the automobile.

[0071] The above merely is preferred implementation manner of the present application, and is not used for limiting the present application, it should be pointed out, for ordinary skilled person in the technical field, on the premise of not departing from the technical principle of the present application, can also make several improvements and variations, these improvements and variations also should be regarded as the protection scope of the present application.

Claims

1. A special gauge for hot melt self-piercing rivet fatigue test, characterized in that, Include: Rack (1), the workbench of rack (1) is provided with fixed assembly (2) and movable assembly (3), The fixed assembly (2) is fixedly arranged on the workbench, and a first connecting head (4) is arranged on the fixed assembly (2); The movable assembly (3) is movably arranged on the workbench, and a second connecting head (5) is arranged on the movable assembly (3), and the second connecting head (5) is further connected with a fatigue test unit (9); The test assembly comprises a third connecting head (6) and a fourth connecting head (7), the third connecting head (6) is connected with the first connecting head (4), and the fourth connecting head (7) is connected with the second connecting head (5); A clamping unit (8) is arranged on the third connecting head (6) and the fourth connecting head (7) respectively, each clamping unit (8) is connected with a test plate (10), and the two test plates (10) are connected by the hot melt self tapping screw to be tested.

2. The special purpose gauge for hot melt self-piercing rivet fatigue testing of claim 1, wherein: The movable assembly (3) comprises a moving unit, the moving unit is arranged on the workbench, and the moving unit drives the second connecting head (5) to move.

3. The special purpose gauge for hot melt self-piercing rivet fatigue testing of claim 1, wherein: The fatigue test unit (9) comprises a fatigue tester.

4. The special purpose gauge for hot melt self-piercing rivet fatigue testing of claim 1, wherein: When the hot melt self tapping screw to be tested is perpendicular to the workbench, the two test plates (10) are arranged at an angle.

5. The special purpose gauge for hot melt self-piercing rivet fatigue testing of claim 1, wherein: The clamping unit (8) comprises: A clamping base plate (811) is arranged on one side of the clamping base plate (811), and a third connecting head (6) or a fourth connecting head (7) is arranged on the other side of the clamping base plate (811); a clamping groove (812) is arranged on the other side of the clamping base plate (811), and a test plate (10) is arranged in the clamping groove (812); and A clamping fixed plate (813) is fixed on both sides of the clamping groove (812) by screws.

6. The special purpose gauge for hot melt self-piercing rivet fatigue testing of claim 5, wherein: The clamping groove (812) is further provided with a clearance groove (814), and the clearance groove (814) is matched with the hot melt self tapping screw.

7. The special purpose gauge for hot melt self-piercing rivet fatigue testing of claim 1, wherein: When the hot melt self tapping screw to be tested is parallel to the workbench, the two test plates are arranged in the vertical direction.

8. The special purpose gauge for hot melt self-piercing rivet fatigue testing of claim 1, wherein: The clamping unit (8) further comprises: A clamping connecting plate (821) is arranged on one side of the clamping connecting plate (821), and a third connecting head (6) or a fourth connecting head (7) is arranged on the other side of the clamping connecting plate (821); and A clamping connecting hole (823) is arranged on the clamping vertical plate (822), a clamping connecting pin (824) is arranged in the clamping connecting hole (823), and a test plate in the vertical direction is arranged on the clamping connecting pin (824).

9. The special purpose gauge for hot melt self-piercing rivet fatigue testing of claim 8, wherein: Further comprising a clamping auxiliary plate (825), the clamping auxiliary plate (825) is arranged in parallel with the clamping vertical plate (822), and the test plate is located between the clamping auxiliary plate (825) and the clamping vertical plate (822), and the clamping connecting pin (824) penetrates the clamping auxiliary plate (825) and the clamping vertical plate (822).

10. The special purpose gauge for hot melt self-piercing rivet fatigue testing of claim 8, wherein: A waist-shaped hole (826) is arranged on the clamping connecting plate (821), and the clamping vertical plate (822) is connected by screws in the waist-shaped hole (826).

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