Welding seam testing device

Abstract

The utility model discloses a weld joint testing device which is used for being matched with tension testing equipment to detect a to-be-tested piece, the to-be-tested piece comprises a first connecting section and a second connecting section which are connected with each other, and a weld joint is arranged at the joint of the first connecting section and the second connecting section; the tension test equipment is provided with a chuck for clamping the first connecting section or the second connecting section. The weld joint test device comprises a base, a first clamping piece and a second clamping piece, the first clamping piece is connected to the base, and a first clamping space is formed between the first clamping piece and the base and used for clamping and fixing the first connecting section or the second connecting section; the second clamping piece is movably connected with the first clamping piece, a second clamping space is formed in the second clamping piece and used for clamping the second connecting section or the first connecting section, and the second clamping piece or the first connecting section is suitable for being connected with a chuck of the tension test equipment so as to drive the second clamping piece to move relative to the base through the chuck; therefore, the welding performance between the first connecting section and the second connecting section is detected.

Description

Technical Field

[0001] The present application belongs to the field of battery cell technology, and specifically relates to a weld testing device. Background Art

[0002] Power batteries provide a source of power for various tools. During the power battery assembly process, the battery shell and battery cover are welded using lasers.

[0003] To verify weld reliability, prior art uses multiple rounds of testing and verification, including pressure testing and metallographic analysis, to determine whether the final laser welding process parameters meet the required parameters. However, these methods are complex and expensive to perform. Utility Model Content

[0004] The present application aims to provide a weld testing device that can solve the problems of complex weld testing operations and high testing costs in the prior art.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] An embodiment of the present application proposes a weld testing device for cooperating with a tensile testing device to detect a test piece to be tested, wherein the test piece includes a first connecting section and a second connecting section connected to each other, and a weld is provided at the connection between the first connecting section and the second connecting section; the tensile testing device has a clamp for clamping the first connecting section or the second connecting section, and the weld testing device includes: a base, a first clamping member and a second clamping member; the first clamping member is connected to the base, and a first clamping space is formed between the first clamping member and the base for clamping and fixing the first connecting section; the second clamping member is movably connected to the first clamping member, and a second clamping space is provided in the second clamping member for clamping the second connecting section, and the second clamping member is suitable for connecting to the clamp of the tensile testing device to drive the second clamping member to move relative to the base through the clamp to detect the welding performance between the first connecting section and the second connecting section.

[0007] Optionally, the first clamping member includes a first fixing plate and a first adjusting member; the first fixing plate is arranged on the base, a first clamping space is formed between the first fixing plate and the base, and the first adjusting member connects the first fixing plate and the base for adjusting the size of the first clamping space.

[0008] Optionally, the second clamping member includes a second fixing plate, a third fixing plate and a second adjusting member; the end of the second fixing plate abuts against the end of the first fixing plate, the third fixing plate is arranged on the side of the second fixing plate away from the first fixing plate, and a second clamping space is formed between the second fixing plate and the third fixing plate, and the second adjusting member connects the second fixing plate and the third fixing plate for adjusting the size of the second clamping space.

[0009] Optionally, the second fixing plate is arranged at an angle to the first fixing plate; the second fixing plate is provided with a first inclined surface at one end facing the first fixing plate, and the first fixing plate is provided with a second inclined surface at one end facing the second fixing plate, and the first inclined surface abuts against the second inclined surface.

[0010] Optionally, a first mounting hole is provided in the base, a second mounting hole is provided in the first fixing plate, and the first adjusting member passes through the second mounting hole and the first mounting hole in sequence to fix the first fixing plate to the base to adjust the size of the first clamping space.

[0011] Optionally, there are multiple first mounting holes in the base, and the multiple first mounting holes are arranged in rows at intervals; and / or, the second mounting hole is a waist-shaped hole.

[0012] Optionally, a connecting portion is provided at the end of the second fixing plate; the connecting portion is used to connect to the clamp of the tensile testing equipment.

[0013] Optionally, the weld testing device further includes a calibration component; the calibration component is detachably connected to the first fixing plate and the second fixing plate, respectively, and the calibration component is used to calibrate the initial positions of the first fixing plate and the second fixing plate.

[0014] Optionally, the calibration member includes a first calibration part and a second calibration part; the first calibration part and the second calibration part are connected to each other, the first calibration part and the first fixing plate are detachably connected, and the second calibration part and the second fixing plate are detachably connected.

[0015] Optionally, a preset angle is formed between the first calibration portion and the second calibration portion, and the preset angle is equal to an angle between the first connecting section and the second connecting section.

[0016] In an embodiment of the present application, a first clamping member is connected to a base, a first connecting section is disposed in a first clamping space formed between the first clamping member and the base, a second clamping member is movably connected to the first clamping member, a second connecting section is disposed in a second clamping space in the second clamping member, and the second clamping member is connected to a clamp head of a tensile testing device. Thus, the clamp head of the tensile testing device drives the second clamping member to move relative to the first holding member, causing displacement between the second connecting section and the first connecting section, thereby testing the welding performance of the weld between the first and second connecting sections. The operation is simple, convenient, fast, and low-cost.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of an installation state of a weld testing device according to an embodiment of the present application;

[0020] Figure 2 Schematic diagram of a weld testing device in a clamping state according to an embodiment of the present application;

[0021] Figure 3 is a schematic diagram of a test piece according to an embodiment of the present application;

[0022] Figure 4 is a schematic diagram of a base according to an embodiment of the present application;

[0023] Figure 5 is a schematic diagram of a first fixing plate according to an embodiment of the present application;

[0024] Figure 6 is a schematic diagram of a second fixing plate according to an embodiment of the present application;

[0025] Figure 7 Schematic diagram of the third fixing plate of the embodiment of the present application.

[0026] Reference numerals:

[0027] 1-base; 2-first clamping member; 3-first clamping space; 4-test piece; 5-second clamping member; 6-second clamping space; 7-first mounting hole; 8-second mounting hole; 9-calibration member; 10-first calibration part; 11-second calibration part; 12-top cover; 13-housing; 21-first fixing plate; 22-first adjusting member; 23-first inclined surface; 41-first connecting section; 42-second connecting section; 43-weld; 51-second fixing plate; 52-third fixing plate; 53-second adjusting member; 54-second inclined surface; 55-connecting part. DETAILED DESCRIPTION

[0028] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0032] The weld testing device provided in the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0033] like Figures 1 to 7 As shown, according to some embodiments of the present application, a weld testing device is used to cooperate with a tensile testing device to detect a test piece 4, where the test piece 4 includes a first connecting section 41 and a second connecting section 42 connected to each other, and a weld 43 is provided at the connection between the first connecting section 41 and the second connecting section 42; the tensile testing device has a chuck for clamping the first connecting section 41 or the second connecting section 42, and the weld testing device includes: a base 1, a first clamping member 2 and a second clamping member 5; the first clamping member 2 is connected to the base 1, and a first clamping space 3 is formed between the first clamping member 2 and the base 1 for clamping and fixing the first connecting section 41; the second clamping member 5 is movably connected to the first clamping member 2, and a second clamping space 6 is provided in the second clamping member 5 for clamping the second connecting section 42, and the second clamping member 5 is suitable for connecting to the chuck of the tensile testing device to drive the second clamping member 5 to move relative to the base 1 through the chuck to detect the welding performance between the first connecting section 41 and the second connecting section 42.

[0034] In the embodiment of the present application, the first clamping member 2 is connected to the base 1, the first connecting section 41 is disposed in the first clamping space 3 formed between the first clamping member 2 and the base 1, the second clamping member 5 is movably connected to the first clamping member 2, the second connecting section 42 is disposed in the second clamping space 6 of the second clamping member 5, and the second clamping member 5 is connected to the clamp of the tensile testing device. In this way, the clamp of the tensile testing device drives the second clamping member 5 to move relative to the first clamping member 2, so that the second connecting section 42 and the first connecting section 41 are displaced, thereby detecting the welding performance of the weld between the first connecting section 41 and the second connecting section 42. The operation is simple, convenient, fast, and low-cost.

[0035] In some embodiments, welding performance includes: tensile strength of the weld, shear strength of the weld, and fatigue strength of the weld. A method for testing the tensile strength of the weld includes: clamping the first connecting section 41 in the first clamping space 3, the second connecting section 42 is arranged in the second clamping space 6, and a tensile testing device applies a linear force to the second clamping member 5, thereby detecting the tensile strength of the weld 43. A method for testing the shear strength of the weld includes: the second connecting section 42 is arranged in the first clamping space 3, the first connecting section 41 is arranged in the second clamping space 6, and a tensile testing device applies a linear force to the second clamping member 5, thereby detecting the shear strength of the weld 43. A method for testing the fatigue strength of the weld includes: the first connecting section 41 is arranged in the first clamping space 3, the second connecting section 42 is arranged in the second clamping space 6, and a tensile testing device applies a cyclically varying force to the second clamping member 5, thereby detecting the fatigue strength of the weld 43.

[0036] Alternatively, as Figure 1 、 Figure 2 、 Figure 5 As shown, the first clamping member 2 includes a first fixing plate 21 and a first adjusting member 22; the first fixing plate 21 is arranged on the base 1, and a first clamping space 3 is formed between the first fixing plate 21 and the base 1, and the first adjusting member 22 connects the first fixing plate 21 and the base 1, and is used to adjust the size of the first clamping space 3.

[0037] In the embodiment of the present application, the first fixing plate 21 is disposed on the base 1, forming a first clamping space 3 between the first fixing plate 21 and the base 1, and the first adjusting member 22 connects the first fixing plate 21 and the base 1. In this way, the size of the first clamping space 3 can be adjusted by the first adjusting member 22, so that test pieces 4 of different sizes can be fixed in the first clamping space 3, thereby being compatible with test pieces 4 of different sizes.

[0038] In some embodiments, the size of the first fixing plate 21 can be selected according to the size of the first connecting section 41 , as long as the first fixing plate 21 can completely cover the first connecting section 41 .

[0039] Alternatively, as Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 As shown, the second clamping member 5 includes a second fixing plate 51, a third fixing plate 52 and a second adjusting member 53; the end of the second fixing plate 51 abuts against the end of the first fixing plate 21, and the third fixing plate 52 is arranged on the side of the second fixing plate 51 away from the first fixing plate 21. A second clamping space 6 is formed between the second fixing plate 51 and the third fixing plate 52, and the second adjusting member 53 connects the second fixing plate 51 and the third fixing plate 52 for adjusting the size of the second clamping space 6.

[0040] In the embodiment of the present application, the end of the second fixing plate 51 is brought into contact with the end of the first fixing plate 21, and the third fixing plate 52 is positioned on a side of the second fixing plate 51 away from the first fixing plate 21. A second clamping space 6 is formed between the second fixing plate 51 and the third fixing plate 52, and a second adjusting member 53 connects the second fixing plate 51 and the third fixing plate 52. Thus, the size of the second clamping space 6 can be adjusted by the second adjusting member 53, so that test pieces 4 of different sizes can be fixed in the second clamping space 6, thereby being compatible with test pieces 4 of different sizes.

[0041] In some embodiments, the second adjusting member 53 includes a bolt and a nut, and the bolt passes through the mounting holes set in the second fixing plate 51 and the third fixing plate 52 in turn. The nut cooperates with the bolt to adjust the size of the second clamping space 6 and fix the second connecting section 42 at the same time.

[0042] Alternatively, as Figure 1 、 Figure 5 、 Figure 6 As shown, the second fixing plate 51 is set at an angle to the first fixing plate 21; a first inclined surface 23 is provided at one end of the second fixing plate 51 facing the first fixing plate 21, and a second inclined surface 54 is provided at one end of the first fixing plate 21 facing the second fixing plate 51, and the first inclined surface 23 abuts against the second inclined surface 54.

[0043] In the embodiment of the present application, a first inclined surface 23 is provided on one end of the second fixing plate 51 facing the first fixing plate 21, and a second inclined surface 54 is provided on one end of the first fixing plate 21 facing the second fixing plate 51, so that the first inclined surface 23 abuts the second inclined surface 54. Thus, by providing the first inclined surface 23 and the second inclined surface 54 abutting against each other, the second fixing plate 51 and the first fixing plate 21 are extended as far as possible to the weld 43 of the test piece 4, so that the test piece 4 cooperates with the second fixing plate 51 and the first fixing plate 21, respectively.

[0044] In some embodiments, the sum of the angles of the first inclined surface 23 and the second inclined surface 54 can be 15°, 30°, 45°, 60°, 75°, 90°, etc., wherein Figure 5 As shown, the angle of the first inclined surface 23 is the slope angle of the first inclined surface 23; similarly, Figure 6 As shown, the angle of the second inclined surface 54 is the slope angle of the second inclined surface 54 .

[0045] Preferably, the sum of the slope angles of the first bevel 23 and the second bevel 54 is 90°; for example, the first bevel 23 is set to 45°, and the second bevel 54 is also set to 45°; or the first bevel 23 is set to 30°, and the second bevel 54 is set to 60°. This embodiment of the present application is not limited here.

[0046] Alternatively, as Figure 1 、 Figure 4 and Figure 5 As shown, a first mounting hole 7 is provided in the base 1, a second mounting hole 8 is provided in the first fixing plate 21, and the first adjusting member 22 passes through the second mounting hole 8 and the first mounting hole 7 in sequence to fix the first fixing plate 21 to the base 1 to adjust the size of the first clamping space 3.

[0047] In the embodiment of the present application, a first mounting hole 7 is provided in the base 1, a second mounting hole 8 is provided in the first fixing plate 21, and the first adjusting member 22 is sequentially passed through the second mounting hole 8 and the first mounting hole 7 to fix the first fixing plate 21 to the base 1. In this way, the size of the first clamping space 3 can be adjusted by passing the first adjusting member 22 through the second mounting hole 8 and the first mounting hole 7, thereby facilitating the installation and fixation of the test piece 4.

[0048] In some embodiments, as Figure 1 As shown, the second mounting holes 8 can be provided on both sides of the first fixing plate 21. In this way, the first adjusting member 22 can more firmly fix the first fixing plate 21 on the base 1.

[0049] Alternatively, as Figure 1 and Figure 4 As shown, there are multiple first mounting holes 7 in the base 1, and the multiple first mounting holes 7 are arranged in rows at intervals.

[0050] In the embodiment of the present application, a plurality of first mounting holes 7 are provided in the base 1, and the plurality of first mounting holes 7 are arranged in rows at intervals. In this way, the first adjusting member 22 can be connected to different first mounting holes 7, thereby facilitating adjustment of the relative position between the first adjusting member 22 and the base 1.

[0051] In some embodiments, the first mounting hole 7 can be a mounting hole with threads, and the first adjusting member 22 is fixed to the first mounting hole 7 through a threaded connection; of course, the first mounting hole 7 can be a mounting hole without threads, and the first adjusting member 22 is connected to the nut after passing through the first mounting hole 7.

[0052] Alternatively, as Figure 1 、 Figure 5 As shown, the second mounting hole 8 is a waist-shaped hole.

[0053] In the embodiment of the present application, the second mounting hole 8 is configured as a waist-shaped hole. In this way, the relative position between the first adjusting member 22 and the base 1 can be further adjusted, so that the center line of the second fixing plate 51 and the center line of the clamp of the tensile testing device are aligned.

[0054] In some embodiments, the base 1 is fixed to a fixed base of a tensile testing device because, during the performance test of the weld 43, the second fixing plate 51 needs to be aligned with the chuck of the tensile testing device. The specific setting process includes: first, moving the first fixing plate 21 on the base 1 so that the first fixing plate 21 is approximately located below the chuck of the tensile testing device; then, inserting the first adjustment member 22 through the first fixing plate 21 and the first mounting hole 7 on the base 1 for preliminary fixing; then, slightly moving the first fixing plate 21 so that the first fixing plate 21 moves within the waist-shaped hole, and then adjusting the position of the second fixing plate 51 so that the centerline of the second fixing plate 51 is aligned with the centerline of the chuck of the tensile testing device.

[0055] Alternatively, as Figures 1 to 2 As shown, a connecting portion 55 is provided at the end of the second fixing plate 51; the connecting portion 55 is used to connect to the clamp of the tensile testing equipment.

[0056] In the embodiment of the present application, a connecting portion 55 is provided at the end of the second fixed plate 51, so that the chuck of the tensile testing device can conveniently clamp the second fixed plate 51; in addition, the chuck of the tensile testing device is connected to the second fixed plate 51 through the connecting portion 55, thereby avoiding direct connection between the chuck of the tensile testing device and the second fixed plate 51, thereby avoiding damage to the second fixed plate 51.

[0057] In some embodiments, as Figures 1 to 2 As shown, the connecting portion 55 is provided at one end of the second fixing plate 51 away from the base 1 , and the connecting portion 55 is provided in a flat shape so as to increase the force-bearing area and ensure a firm connection between the clamp of the tensile testing equipment and the connecting portion 55 .

[0058] Alternatively, as Figure 1 As shown, the weld testing device further includes a calibration member 9 ; the calibration member 9 is detachably connected to the first fixing plate 21 and the second fixing plate 51 , respectively, and the calibration member 9 is used to calibrate the initial positions of the first fixing plate 21 and the second fixing plate 51 .

[0059] In the embodiment of the present application, the calibration member 9 is detachably connected to the first fixing plate 21 and the second fixing plate 51. In this way, the calibration member 9 can calibrate the initial positions of the first fixing plate 21 and the second fixing plate 51, so that the initial positions of the first fixing plate 21 and the second fixing plate 51 are the same as the initial positions of the first connecting section 41 and the second connecting section 42, so as to facilitate more accurate testing.

[0060] In some embodiments, the calibration piece 9 may be Figure 1 The L-shaped structural member shown may also be a triangular, rectangular, or other structural member, and the embodiment of the present application does not limit this.

[0061] Alternatively, as Figure 1As shown, the calibration member 9 includes a first calibration portion 10 and a second calibration portion 11; the first calibration portion 10 and the second calibration portion 11 are connected to each other, the first calibration portion 10 and the first fixing plate 21 are detachably connected, and the second calibration portion 11 and the second fixing plate 51 are detachably connected.

[0062] In the embodiment of the present application, the first calibration portion 10 and the second calibration portion 11 are connected to each other, the first calibration portion 10 and the first fixing plate 21 are detachably connected, and the second calibration portion 11 and the second fixing plate 51 are detachably connected. In this way, by providing the first calibration portion 10 and the first fixing plate 21 with a detachable connection, and the second calibration portion 11 and the second fixing plate 51 with a detachable connection, it is simple and convenient to install the calibration member 9.

[0063] In some embodiments, as Figure 1 As shown, waist-shaped holes are provided in the first calibration part 10 and the second calibration part 11 , and fasteners pass through the waist-shaped holes and are connected to the first fixing plate 21 and the second fixing plate 51 respectively, so that the calibration part 9 is fixed on the first fixing plate 21 and the second fixing plate 51 .

[0064] Optionally, a preset angle is formed between the first calibration portion 10 and the second calibration portion 11 , and the preset angle is equal to the angle between the first connecting section 41 and the second connecting section 42 .

[0065] In the embodiment of the present application, a preset angle is set between the first calibration portion 10 and the second calibration portion 11, and the preset angle is equal to the angle between the first connecting section 41 and the second connecting section 42. In this way, by setting the preset angle equal to the angle between the first connecting section 41 and the second connecting section 42, the second connecting section 42 and the first connecting section 41 are no longer subject to interference from any external forces other than the force applied by the chuck of the tensile test, thereby ensuring the accuracy of the test.

[0066] Preferably, the preset angle is 90°; generally speaking, the angle between the first connecting section 41 and the second connecting section 42 of the test piece 4 is 90°. Thus, the first calibration section 10 and the second calibration section 11 are parallel to the first fixing plate 21 and the second fixing plate 51, respectively, while the first connecting section 41 and the second connecting section 42 are parallel to the first fixing plate 21 and the second fixing plate 51, respectively. This ensures that the angle between the first calibration section 10 and the second calibration section 11 is the same as the angle between the first connecting section 41 and the second connecting section 42. This ensures that the force acting on the second connecting section 42 and the force acting on the second fixing plate 51 during testing is the same, eliminating interference from other external forces and thus ensuring test accuracy.

[0067] See also Figure 1In one embodiment, since the first calibration part 10 and the second calibration part 11 are respectively connected to the first fixing plate 21 and the second fixing plate 51 by bolts, it is necessary to loosen the bolts or remove the calibration part 9 before testing to avoid the fixation of the calibration part 9 affecting the test results.

[0068] The test process of the tensile strength of the weld 43 of this application includes:

[0069] 1. If Figure 3 As shown, the battery pack is cut and sampled to obtain an L-shaped test piece 4, wherein the first connecting section 41 of the test piece 4 is partially removed from the top cover 12, and the second connecting section 42 of the test piece 4 is partially removed from the shell 13;

[0070] 2. If Figure 1 and Figure 2 As shown, the included angle between the first calibration portion 10 and the second calibration portion 11 of the calibration member 9 is adjusted to be equal to the included angle between the two connecting sections of the test piece 4, so that the first calibration portion 10 is connected to the first fixing plate 21, and the second calibration portion 11 of the calibration member 9 is connected to the second fixing plate 51, so as to calibrate the relative position between the first fixing plate 21 and the second fixing plate 51;

[0071] 3. If Figure 1 and Figure 2 As shown, the base 1 is fixed to the fixing base of the tensile testing device through the mounting holes around the base 1 and the fasteners. The second connecting section 42 is arranged in the second clamping space 6 formed between the second fixing plate 51 and the third fixing plate 52 and fixed by the second adjusting member 53. After the second connecting section 42 is fixed, the connecting portion 55 is connected to the clamp of the tensile testing device so that the second clamping member 5 is suspended on the clamp.

[0072] 4. If Figure 2 As shown, the relative position between the chuck of the tensile testing device and the base 1 is adjusted so that the centerline of the second fixing plate 51 and the centerline of the chuck of the tensile testing device are aligned. The specific process is as described in the above embodiment and will not be repeated here. In this process, after slightly moving the first fixing plate 21 so that the first fixing plate 21 moves within the waist-shaped hole, the first connecting section 41 is positioned within the first clamping space 3 formed between the base 1 and the first clamping member 2 and secured by the first adjusting member 22.

[0073] 5. After fixing, remove the calibration member 9; or loosen the fasteners between the first calibration portion 10 and the first fixing plate 21, and the fasteners between the second calibration portion 11 and the second fixing plate 51;

[0074] 6. The clamp of the tensile testing equipment applies an axial force to the second clamping member 5 , thereby measuring the tensile strength of the weld 43 .

[0075] It should be noted that, in the test process of the shear strength of the weld 43, it is only necessary to set the second connecting section 42 in the first clamping space 3 and the first connecting section 41 in the second clamping space 6. The rest of the test process is the same as the test process of the tensile strength of the weld 43; in the test process of the fatigue strength of the weld 43, the linear force applied by the tensile testing equipment to the second clamping part 5 is changed to a cyclically changing force, so that the fatigue strength of the weld 43 can be detected.

[0076] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0077] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and purpose of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A weld testing device, used for cooperating with a tensile testing device to detect a test piece (4), wherein the test piece (4) comprises a first connecting section (41) and a second connecting section (42) connected to each other, and a weld is provided at the connection between the first connecting section (41) and the second connecting section (42); the tensile testing device comprises a clamping head for clamping the first connecting section (41) or the second connecting section (42), and is characterized in that: The weld testing device comprises: a base (1), a first clamping member (2) and a second clamping member (5); The first clamping member (2) is connected to the base (1), and a first clamping space (3) is formed between the first clamping member (2) and the base (1) for clamping and fixing the first connecting section (41); The second clamping member (5) is movably connected to the first clamping member (2), and a second clamping space (6) is provided in the second clamping member (5) for clamping the second connecting section (42). The second clamping member (5) is suitable for being connected to the clamp of the tensile testing device so as to drive the second clamping member (5) to move relative to the base (1) through the clamp to detect the welding performance between the first connecting section (41) and the second connecting section (42).

2. The weld testing device according to claim 1, characterized in that: The first clamping member (2) comprises a first fixing plate (21) and a first adjusting member (22); The first fixing plate (21) is arranged on the base (1), a first clamping space (3) is formed between the first fixing plate (21) and the base (1), and the first adjusting member (22) connects the first fixing plate (21) and the base (1) and is used to adjust the size of the first clamping space (3).

3. The weld testing device according to claim 2, characterized in that: The second clamping member (5) comprises a second fixing plate (51), a third fixing plate (52) and a second adjusting member (53); The end of the second fixing plate (51) abuts against the end of the first fixing plate (21), and the third fixing plate (52) is arranged on a side of the second fixing plate (51) away from the first fixing plate (21). A second clamping space (6) is formed between the second fixing plate (51) and the third fixing plate (52), and the second adjusting member (53) connects the second fixing plate (51) and the third fixing plate (52) and is used to adjust the size of the second clamping space (6).

4. The weld testing device according to claim 3, characterized in that: The second fixing plate (51) and the first fixing plate (21) are arranged at an angle; a first inclined surface (23) is provided on one end of the second fixing plate (51) facing the first fixing plate (21); a second inclined surface (54) is provided on one end of the first fixing plate (21) facing the second fixing plate (51); the first inclined surface (23) abuts against the second inclined surface (54).

5. The weld testing device according to claim 2, characterized in that: A first mounting hole (7) is provided in the base (1), a second mounting hole (8) is provided in the first fixing plate (21), and the first adjusting member (22) passes through the second mounting hole (8) and the first mounting hole (7) in sequence to fix the first fixing plate (21) to the base (1), thereby adjusting the size of the first clamping space (3).

6. The weld testing device according to claim 5, characterized in that: There are a plurality of first mounting holes (7) in the base (1), and the plurality of first mounting holes (7) are arranged in rows at intervals; and / or the second mounting holes (8) are waist-shaped holes.

7. The weld testing device according to claim 3 or 4, characterized in that: A connecting portion (55) is provided at the end of the second fixing plate (51); the connecting portion (55) is used to connect to the clamp of the tensile testing equipment.

8. The weld testing device according to claim 4, characterized in that: The weld testing device further comprises a calibration piece (9); The calibration member (9) is detachably connected to the first fixing plate (21) and the second fixing plate (51), respectively, and the calibration member (9) is used to calibrate the initial positions of the first fixing plate (21) and the second fixing plate (51).

9. The weld testing device according to claim 8, characterized in that: The calibration member (9) comprises a first calibration portion (10) and a second calibration portion (11); The first calibration part (10) and the second calibration part (11) are connected to each other, the first calibration part (10) and the first fixing plate (21) are detachably connected, and the second calibration part (11) and the second fixing plate (51) are detachably connected.

10. The weld testing device according to claim 9, characterized in that: There is a preset angle between the first calibration portion (10) and the second calibration portion (11), and the preset angle is equal to the angle between the first connecting section (41) and the second connecting section (42).

Images