Welding tension testing tool

Abstract

The utility model relates to the technical field of power battery module welding structure testing devices, and discloses a welding tension testing tool which is used for testing the tension of a welding seam between a middle side plate and an end plate and comprises a base, a cover plate, a mounting piece and a tension mechanism, according to the welding tension testing tool, the cover plate and the base can clamp and fix the end plate through the mounting piece, and the avoiding groove is formed in the base, so that when the end plate is clamped, the part, protruding out of the end plate, of a welding seam is located in the avoiding groove, and it is guaranteed that the top face and the bottom face of the end plate are evenly stressed; therefore, breakage of the end plate earlier than breakage of the weld joint due to uneven stress is avoided, accuracy of data obtained by testing is guaranteed, and the device is simple in structure and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of welding structure testing devices for power battery modules, and particularly relates to a welding tensile force testing tooling. Background Art

[0002] At present, the existing battery housing is usually formed by combining side plates and end plates. In order to ensure that the strength of the battery housing meets the standard, a middle side plate is usually provided in the battery housing to improve the overall strength of the battery housing. Therefore, when testing the strength of the battery housing, in addition to testing the connection strength between the end plate and the side plate, it is also necessary to test the welding tensile force of the weld between the middle side plate and the end plate.

[0003] For the existing welding tensile force testing tooling, the middle side plate is mainly stretched after clamping and fixing the end plate to detect the weld. However, since there is a reinforcement height on the weld between the middle side plate and the end plate, that is, the weld protrudes from the end plate, the weld starts to be stressed when clamping and fixing the end plate. During the tensile force test, due to uneven stress on the end plate, the end plate will crack before the weld, and the measured tensile force data is smaller than the actual tensile force. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a welding tensile force testing tooling that can accurately measure the tensile force data of the weld.

[0005] To achieve the above purpose, the utility model provides a welding tensile force testing tooling for testing the tensile force of the weld between the middle side plate and the end plate, including: a base having an avoidance groove on one side in the first direction, the avoidance groove extending in the second direction, the avoidance groove being used to accommodate the weld protruding from the end plate, the first direction intersecting with the second direction; a cover plate having a through communication port extending in the first direction, the communication port being used for the middle side plate to extend out, the communication port and the avoidance groove being correspondingly arranged in the first direction; a mounting member for mounting the cover plate on the base, and the space between the cover plate and the base being a clamping space for clamping the end plate; a tensile force mechanism for stretching the middle side plate.

[0006] Optionally, the length of the weld protruding from the end plate in the second direction is L1, the length of the avoidance groove in the second direction is L2, and L2 - L1 ≥ 5 mm.

[0007] Optionally, the length of the weld protruding from the end plate in the third direction is L3, the first direction, the second direction and the third direction intersect pairwise, the length of the avoidance groove in the third direction is L4, and L4 - L3 ≥ 3 mm.

[0008] Optionally, the height of the weld seam protruding from the end plate in the first direction is H1, and the height of the avoidance groove in the first direction is H2, where H2 - H1 ≥ 5 mm.

[0009] Optionally, one side of the base in the first direction has a mounting groove, the mounting groove has a bottom surface in the first direction and side surfaces enclosing the bottom surface, the avoidance groove is located on the bottom surface, the cover plate covers the mounting groove, and the cover plate and the mounting groove jointly enclose to form the clamping space.

[0010] Optionally, the height of the end plate in the first direction is H3, and the height of the mounting groove in the first direction is H4, where H4 - H3 ≥ 0.5 mm.

[0011] Optionally, the side of the cover plate facing the mounting groove further has a limiting groove, the limiting groove and the mounting groove are correspondingly arranged, and the limiting groove and the mounting groove jointly enclose to form the clamping space.

[0012] Optionally, the flatness of the surface of the cover plate facing the base is F1, and the flatness of the surface of the base facing the cover plate is F2, where F1 ≤ 0.05 mm and F2 ≤ 0.05 mm.

[0013] Optionally, it further includes a fixing seat and a fixing member. The fixing seat is provided with a first fixing hole, the base is provided with a second fixing hole, and the fixing member passes through the second fixing hole and the first fixing hole to mount the base on the fixing seat.

[0014] Optionally, the base has a first threaded mounting hole extending in the first direction, the cover plate has a second mounting hole extending in the first direction, the first threaded mounting hole and the second mounting hole are correspondingly arranged, and the mounting member passes through the second mounting hole into the first threaded mounting hole to mount the cover plate on the base.

[0015] Compared with the prior art, the welding tensile test tooling in an embodiment of the present invention has the beneficial effects that: through the mounting member, the cover plate and the base can clamp and fix the end plate, and since an avoidance groove is provided on the base, when the end plate is clamped, the part of the weld seam protruding from the end plate will be located in the avoidance groove to ensure uniform stress on the top and bottom surfaces of the end plate, thereby avoiding the fracture of the end plate prior to the fracture of the weld seam due to uneven stress, further ensuring the accuracy of the test data, and the device has a simple structure and is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the main structure of the welding tensile test tooling in an embodiment of the present invention;

[0017] Figure 2 It is the assembly drawing of the welding tensile test tooling in the embodiment of the present utility model;

[0018] Figure 3 It is the schematic diagram of the main structure of the base in the embodiment of the present utility model;

[0019] Figure 4 It is the schematic diagram of the main structure of the cover plate in the embodiment of the present utility model;

[0020] Figure 5 It is the schematic diagram of the connection structure between the middle side plate and the end plate in the embodiment of the present utility model;

[0021] Figure 6 It is the cross-sectional view of the weld seam in the second direction in the embodiment of the present utility model;

[0022] Figure 7 It is the top view of the base in the embodiment of the present utility model;

[0023] Figure 8 It is in the embodiment of the present utility model Figure 7 The cross-sectional view in the A-A direction;

[0024] Figure 9 It is the cross-sectional view of the weld seam in the third direction in the embodiment of the present utility model;

[0025] Figure 10 It is the side view of the welding tensile test tooling in the embodiment of the present utility model.

[0026] In the figure, 1, base; 11, installation groove; 111, avoidance groove; 12, second fixing hole; 13, first installation hole; 2, cover plate; 21, communication port; 22, limiting groove; 23, second installation hole; 3, installation part; 4, clamping space; 5, tensile mechanism; 51, clamping part; 511, first clamping plate; 512, second clamping plate; 6, fixed seat; 61, first fixing hole; 7, fixing part; 8, middle side plate; 9, end plate; 10, weld seam; X, first direction; Y, second direction; Z, third direction. Detailed implementation manners

[0027] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0028] In the description of the present utility model, it should be understood that the terms "first" and "second" used in the present utility model are only for descriptive purposes to distinguish technical features of the same type, and cannot be construed as indicating or implying the relative importance, order, and quantity of these technical features. That is, the "first" technical feature can be called the "second" technical feature, and the "second" technical feature can also be called the "first" technical feature. Moreover, the technical features defined with "first" and "second" can explicitly or implicitly include one or more of such technical features. Additionally, unless otherwise specified, the meaning of "a plurality" is two or more.

[0029] It should be emphasized that in the description of the present application, unless otherwise clearly specified and defined, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to specific circumstances.

[0030] As Figures 1-5 shown, a welding tensile force testing tooling of a preferred embodiment of the present utility model for testing the tensile force of the weld seam 10 between the middle side plate 8 and the end plate 9 includes: a base 1 having an avoidance groove 111 on one side in the first direction X, the avoidance groove 111 approximately extending along the second direction Y, the avoidance groove 111 being used to accommodate the weld seam 10 protruding from the end plate 9, and the first direction X intersecting with the second direction Y; a cover plate 2 having a communication port 21 approximately extending along the first direction X and penetrating through, the communication port 21 being used for the middle side plate 8 to extend out, and the communication port 21 and the avoidance groove 111 being correspondingly arranged in the first direction X; a mounting member 3 for mounting the cover plate 2 on the base 1, and the space between the cover plate 2 and the base 1 being a clamping space 4, the clamping space 4 being used to clamp the end plate 9; and a tensile force mechanism 5 for stretching the middle side plate 8.

[0031] Based on the above solution, the welding tensile force testing tooling enables the cover plate 2 and the base 1 to clamp and fix the end plate 9 through the mounting member 3. And since the avoidance groove 111 is provided on the base 1, when clamping the end plate 9, the part of the weld seam 10 protruding from the end plate 9 will be located in the avoidance groove 111, so as to ensure uniform stress on the top and bottom surfaces of the end plate 9, thereby avoiding the fracture of the end plate 9 due to uneven stress prior to the fracture of the weld seam 10, and further ensuring the accuracy of the measured data. The measured data is the actual tensile force required when the weld seam 10 fractures, and this device has a simple structure and is convenient to use.

[0032] As Figure 6 and Figure 7As shown, in order to facilitate the placement of the weld 10 in the avoidance groove 111, the length of the weld 10 protruding from the end plate 9 in the second direction Y is L1, and the length of the avoidance groove 111 in the second direction Y is L2, L2-L1≥5mm. Since the weld 10 is usually an irregular shape, a margin of the avoidance groove 111 is set to facilitate the placement of the weld 10.

[0033] It is particularly noted that the length L1 of the weld 10 protruding from the end plate 9 in the second direction Y can be measured by a vernier caliper, and the two ends of the weld 10 that are farthest from each other in the second direction Y are selected during the measurement. The length L2 of the avoidance groove 111 in the second direction Y can also be measured by a vernier caliper.

[0034] like Figure 7 and Figure 9 As shown, in order to facilitate the placement of the weld 10 in the avoidance groove 111, the length of the weld 10 protruding from the end plate 9 in the third direction Z is L3, the first direction X, the second direction Y and the third direction Z intersect each other, and the length of the avoidance groove 111 in the third direction Z is L4, L4-L3≥3mm, and since the weld 10 is usually an irregular shape, a margin of the avoidance groove 111 is set to facilitate the placement of the weld 10.

[0035] It is particularly noted that the length L3 of the weld 10 protruding from the end plate 9 in the third direction Z can be measured by a vernier caliper, and the two ends of the weld 10 farthest from each other in the third direction Z are selected during measurement. The length L4 of the avoidance groove 111 in the third direction Z can also be measured by a vernier caliper.

[0036] like Figure 8 and Figure 9 As shown, in order to facilitate the placement of the weld 10 in the avoidance groove 111, the height of the weld 10 protruding from the end plate 9 in the first direction X is H1, and the height of the avoidance groove 111 in the first direction X is H2, H2-H1≥5mm. Since the weld 10 is usually an irregular shape, a margin of the avoidance groove 111 is set to facilitate the placement of the weld 10.

[0037] It is particularly noted that the height H1 of the weld 10 protruding from the end plate 9 in the first direction X can be measured by a vernier caliper, and when measuring, the height H1 in the first direction X is obtained by measuring the distance from the end of the weld 10 away from the end plate 9 to the end plate 9, and the height H2 of the avoidance groove 111 in the first direction X can also be measured by a vernier caliper.

[0038] like Figure 3As shown, in order to limit the end plate 9 and prevent the end plate 9 from shifting when the cover plate 2 and the base 1 clamp the end plate 9, the base 1 has an installation groove 11 on one side in the first direction X. The installation groove 11 has a bottom surface in the first direction X and side surfaces surrounding the bottom surface. The avoidance groove 111 is located on the bottom surface. The cover plate 2 covers the installation groove 11, and the cover plate 2 and the installation groove 11 jointly enclose a clamping space 4.

[0039] As Figure 10 shown, in order to prevent the end plate 9 from being crushed by the cover plate 2 and the base 1 during limiting, the height of the end plate 9 in the first direction X is H3, and the height of the installation groove 11 in the first direction X is H4, where H4 - H3 ≥ 0.5 mm. This allows the cover plate 2 and the base 1 to provide a margin for the end plate 9, preventing the end plate 9 from being damaged when being limited.

[0040] Specifically, the height H3 of the end plate 9 in the first direction X can be measured with a vernier caliper, and the height H4 of the installation groove 11 in the first direction X can be measured with a depth gauge.

[0041] As Figure 4 shown, in order to further limit the end plate 9, the cover plate 2 also has a limiting groove 22 on the side facing the installation groove 11. The limiting groove 22 and the installation groove 11 are correspondingly arranged, and the limiting groove 22 and the installation groove 11 jointly enclose the clamping space 4 to clamp the end plate 9 through the clamping space 4.

[0042] Optionally, in order to ensure uniform force on the cover plate 2, the flatness of the surface of the cover plate 2 facing the base 1 is F1, and the flatness of the surface of the base 1 facing the cover plate 2 is F2, where F1 ≤ 0.05 mm and F2 ≤ 0.05 mm.

[0043] Specifically, the flatness F1 of the surface of the cover plate 2 facing the base 1 and the flatness F2 of the surface of the base 1 facing the cover plate 2 can both be measured with a yaw meter or a data acquisition instrument.

[0044] As Figure 1 and Figure 2 shown, for ease of use and to prevent the base 1 from shifting during the welding tensile test, which may affect the test results, it further includes a fixing base 6 and a fixing member 7. The fixing base 6 is provided with a first fixing hole 61, and the base 1 is provided with a second fixing hole 12. The fixing member 7 passes through the second fixing hole 12 and the first fixing hole 61 to install the base 1 on the fixing base 6.

[0045] In some embodiments, in order to improve adaptability, the fixing base 6 has multiple first fixing holes 61. The fixing member 7 passes through the second fixing hole and one of the first fixing holes 61 to install the base 1 on the fixing base 6. By providing multiple first fixing holes 61, the fixing base 6 can be adapted to bases 1 of different specifications.

[0046] like Figures 1-4 As shown, in order to ensure the clamping effect of the cover plate 2 and the base 1, the base 1 has a first threaded mounting hole 13 extending approximately along the first direction X, and the cover plate 2 has a second mounting hole 23 extending approximately along the first direction X. The first threaded mounting hole 13 and the second mounting hole 23 are correspondingly arranged, and the mounting member 3 passes through the second mounting hole 23 to the first threaded mounting hole 13, and the end of the mounting member 3 facing away from the base 1 is received in the second mounting hole 23, and the cover plate 2 and the base 1 are tightened by screwing the mounting member 3.

[0047] In some embodiments, the mounting member 3 is a bolt, the first threaded mounting hole 13 is a threaded hole, and the second mounting hole 23 is a countersunk through hole.

[0048] like Figure 3 As shown, in some embodiments, in order to facilitate observation of the fracture conditions of the weld 10 and the cover plate 2, the mounting groove 11 extends approximately along the second direction Y, and the mounting groove 11 passes through one side of the base 1 in the second direction Y, so as to facilitate observation of specific conditions during the test process.

[0049] like Figure 2 As shown, in some embodiments, the pulling mechanism 5 includes a clamping portion 51, which is used to clamp the portion of the middle side plate 8 protruding from the cover plate 2. The clamping portion 51 includes a first clamping plate 511 and a second clamping plate 512. The first clamping plate 511 and the second clamping plate 512 are respectively clamped on both sides of the middle side plate 8 in the third direction Z.

[0050] In summary, the embodiment of the utility model provides a welding tensile test fixture, which enables the cover plate 2 and the base 1 to clamp and fix the end plate 9 through the mounting member 3, and because the avoidance groove 111 is provided on the base 1, when the end plate 9 is clamped, the portion of the weld 10 protruding from the end plate 9 will be located in the avoidance groove 111, so as to ensure that the top and bottom surfaces of the end plate 9 are evenly stressed, thereby avoiding the fracture of the end plate 9 before the fracture of the weld 10 due to uneven stress, thereby ensuring the accuracy of the test data, and the measured data is the actual tensile force required when the weld 10 breaks, and the device has a simple structure and is easy to use.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A welding tensile test tool, used for testing the tensile force of a weld (10) between a middle side plate (8) and an end plate (9), characterized in that: include: A base (1) having an avoidance groove (111) on one side in a first direction (X), the avoidance groove (111) extending along a second direction (Y), the avoidance groove (111) being used to accommodate the weld (10) protruding from the end plate (9), the first direction (X) intersecting with the second direction (Y); The cover plate (2) has a communication opening (21) extending along the first direction (X) and penetrating therethrough, the communication opening (21) being used for allowing the middle side plate (8) to extend out, and the communication opening (21) and the avoidance groove (111) being arranged correspondingly in the first direction (X); A mounting member (3) for mounting the cover plate (2) on the base (1), wherein the space between the cover plate (2) and the base (1) is a clamping space (4), and the clamping space (4) is used for clamping the end plate (9); The tension mechanism (5) is used to stretch the middle side plate (8).

2. The welding tensile test fixture according to claim 1, wherein the length of the weld (10) protruding from the end plate (9) in the second direction (Y) is L1, characterized in that: The length of the avoidance groove (111) in the second direction (Y) is L2, L2-L1≥5mm.

3. According to the welding tensile test fixture of claim 1, the length of the weld (10) protruding from the end plate (9) in the third direction (Z) is L3, and the first direction (X), the second direction (Y) and the third direction (Z) intersect each other, characterized in that: The length of the avoidance groove (111) in the third direction (Z) is L4, and L4-L3≥3 mm.

4. The welding tensile test fixture according to claim 1, wherein the height of the weld (10) protruding from the end plate (9) in the first direction (X) is H1, characterized in that: The height of the avoidance groove (111) in the first direction (X) is H2, and H2-H1≥5mm.

5. The welding tensile test tool according to any one of claims 1 to 4, characterized in that: The base (1) has a mounting groove (11) on one side in the first direction (X), the mounting groove (11) having a bottom surface in the first direction (X) and a side surface enclosed by the bottom surface, the avoidance groove (111) is located on the bottom surface, the cover plate (2) covers the mounting groove (11), and the cover plate (2) and the mounting groove (11) together enclose to form the clamping space (4).

6. The welding tensile test fixture according to claim 5, wherein the height of the end plate (9) in the first direction (X) is H3, characterized in that: The height of the installation groove (11) in the first direction (X) is H4, and H4-H3≥0.5 mm.

7. The welding tensile test tool according to claim 5, characterized in that: The cover plate (2) further comprises a limiting groove (22) on one side facing the mounting groove (11); the limiting groove (22) and the mounting groove (11) are arranged correspondingly, and the limiting groove (22) and the mounting groove (11) together enclose the clamping space (4).

8. The welding tensile test tool according to claim 1, characterized in that: The flatness of the side of the cover plate (2) facing the base (1) is F1, and the flatness of the side of the base (1) facing the cover plate (2) is F2, F1≤0.05mm, F2≤0.05mm.

9. The welding tensile test tool according to claim 1, characterized in that: It also comprises a fixing seat (6) and a fixing member (7), wherein the fixing seat (6) is provided with a first fixing hole (61), the base (1) is provided with a second fixing hole (12), and the fixing member (7) passes through the second fixing hole (12) and the first fixing hole (61) so as to mount the base (1) on the fixing seat (6).

10. The welding tensile test tool according to claim 1, characterized in that: The base (1) has a first threaded mounting hole (13) extending along the first direction (X), and the cover plate (2) has a second mounting hole (23) extending along the first direction (X). The first threaded mounting hole (13) and the second mounting hole (23) are arranged correspondingly, and the mounting member (3) passes through the second mounting hole (23) to the first threaded mounting hole (13) so as to mount the cover plate (2) on the base (1).

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