Fixed joint for testing tensile strength of soldering paste

Abstract

The utility model discloses a fixed joint for testing the tensile strength of soldering paste, which is arranged at the to-be-welded end parts of two to-be-welded tensile test pieces, a welding gap is formed between the two to-be-welded end parts, and the fixed joint comprises a main body plate and two fixed plates. The main body plate is provided with a first hollow part; the two fixing plates are arranged on the two sides of the main body plate, and the two fixing plates are detachably fixed to the positions close to the to-be-welded ends of the two tensile test pieces respectively; and the first hollow part is constructed to expose the welding gap to the outside in a working state and is not in contact with the welding gap. According to the fixed joint for testing the tensile strength of the soldering paste, the distance of a welding gap of two tensile test pieces can be ensured and maintained, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding, and particularly relates to a fixed joint for testing the tensile strength of solder paste. Background Art

[0002] After the solder paste is made, in order to verify the strength of the solder paste after welding, it is usually necessary to weld the solder paste between two test pieces and then conduct a tensile test. To ensure the consistency of multiple tests, the welding distance between the two test pieces needs to be kept consistent. The existing fixing method between the test pieces is to fix them through a clamping mold. In order to ensure the accuracy of clamping, bolts, nuts and other accessories are required to complete the clamping of the test pieces during the clamping process. Therefore, during the test process, the clamping mold takes a lot of time to complete the clamping of the test pieces. When it is necessary to measure the solder paste multiple times, the test pieces need to be repeatedly disassembled and assembled on the clamping mold. For the welding strength test of multiple batches, the existing clamping mold is complex in operation, time-consuming and inefficient.

[0003] The information disclosed in this background art section is only for increasing the understanding of the general background of the utility model, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a fixed joint for testing the tensile strength of solder paste, which can ensure and maintain the distance of the welding gap between two tensile test pieces and improve the assembly efficiency.

[0005] To achieve the above purpose, a specific embodiment of the utility model provides a fixed joint for testing the tensile strength of solder paste, which is arranged at the to-be-welded ends of two tensile test pieces to be welded, and there is a welding gap between the two welding ends. The fixed joint includes: a main body plate and two fixing plates. The main body plate is provided with a first hollow part; the two fixing plates are arranged on both sides of the main body plate, and the two fixing plates are respectively detachably fixed near the to-be-welded ends of the two tensile test pieces; wherein, the first hollow part is configured to expose the welding gap to the outside and have no contact with the welding gap in the working state.

[0006] In one or more embodiments of the utility model, the fixing plate and the tensile test piece are connected by spot welding.

[0007] In one or more embodiments of the utility model, a plurality of pairs of fixing column pairs are sequentially arranged on the lower surface of each fixing plate along the length direction of the fixing plate. Each pair of fixing column pairs includes two fixing columns sequentially arranged along the width direction of the fixing plate, and the interval between the two fixing columns is less than or equal to the width of the corresponding area of the tensile test piece.

[0008] In one or more embodiments of the present utility model, the distance between the two fixing posts of each pair of fixing posts gradually decreases from the end of the fixing plate far from the hollowed-out part to the end close to the hollowed-out part.

[0009] In one or more embodiments of the present utility model, the fixing joint further includes an auxiliary plate, and the auxiliary plate is used to be connected to the fixing plate to clamp the tensile test piece between the auxiliary plate and the fixing plate.

[0010] In one or more embodiments of the present utility model, the auxiliary plate is provided with mating holes at positions corresponding to the fixing posts of the fixing plate, and the fixing posts can be inserted into the mating holes; and / or, the auxiliary plate and the fixing plate are correspondingly provided with connection holes for connecting the auxiliary plate and the fixing plate.

[0011] In one or more embodiments of the present utility model, the auxiliary plate is provided with a second hollowed-out part at a position corresponding to the first hollowed-out part of the main body plate, and the second hollowed-out part is configured to expose the welding gap to the outside and have no contact with the welding gap in the working state.

[0012] In one or more embodiments of the present utility model, the width of the fixing plate gradually decreases from the end of the main body plate far from the hollowed-out part to the end close to the hollowed-out part, and the narrowest part of the width of the fixing plate is smaller than the width of the main body plate.

[0013] In one or more embodiments of the present utility model, arc-shaped walls extending downward are provided at both edges of the lower surface of each fixing plate along the width direction of the fixing plate.

[0014] In one or more embodiments of the present utility model, a horizontal supporting section is provided at the lower edge of the arc-shaped wall and abuts against the lower surface of the tensile test piece.

[0015] Compared with the prior art, for the fixing joint for solder paste tensile strength testing of the present utility model, the fixing plate can be detachably fixed to the tensile test piece, making it easier to determine and maintain the distance between the welding gaps of the two tensile test pieces. The first hollowed-out part on the main body plate provides a welding window and avoids the influence of the fixing joint on the tensile test. In addition, fixing post pairs or arc-shaped walls can be provided on the fixing plate, which can improve the assembly rate of the tensile test piece and the fixing joint while ensuring and maintaining the consistency of the distance between the welding gaps of the two tensile test pieces. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of a fixed joint for solder paste tensile strength test in an embodiment of the present invention;

[0018] Figure 2 Assembly drawing of the fixed joint and the tensile test piece for solder paste tensile strength test in an embodiment of the present invention;

[0019] Figure 3 Assembly drawing of the fixed joint and the tensile test piece for solder paste tensile strength test in another embodiment of the present invention;

[0020] Figure 4 Exploded view of the fixed joint and the tensile test piece for solder paste tensile strength test in another embodiment of the present invention;

[0021] Figure 5 Assembly drawing of the fixed joint and the tensile test piece for solder paste tensile strength test in yet another embodiment of the present invention;

[0022] Figure 6 Schematic diagram of a fixed joint for solder paste tensile strength test in yet another embodiment of the present invention;

[0023] Figure 7 Schematic diagram of a fixed joint for solder paste tensile strength test in another embodiment of the present invention.

[0024] Main reference numeral description:

[0025] 1 - main body plate, 11 - first hollow portion, 2 - fixing plate, 21A - fixing column, 21B - arc-shaped wall, 22 - horizontal supporting section, 3 - auxiliary plate, 31 - mating hole, 32 - second hollow portion, 4 - tensile test piece, 41 - welding gap, 5 - connecting hole. Detailed implementation manners

[0026] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] As Figure 1 and Figure 2 shown, a fixed joint for solder paste tensile strength testing in an embodiment of the present utility model is disposed near the welding ends of two tensile test pieces 4 to be welded, and there is a welding gap 41 between the two welding ends, so as to be filled with solder paste during the welding operation to weld the two tensile test pieces 4 together. The fixed joint includes: a main body plate 1 and two fixing plates 2. The main body plate 1 is provided with a first hollow portion 11. The two fixing plates 2 are disposed on both sides of the main body plate 1 and are respectively used to detachably fix to the vicinity of the welding ends of the two tensile test pieces 4. Among them, the first hollow portion 11 is configured to expose the welding gap 41 to the outside and have no contact with the welding gap 41 in the working state.

[0028] In the solder paste tensile test, a welding gap 41 needs to be left between the two tensile test pieces 4 for welding. In order to maintain the consistency of the test results, the welding gap 41 between the two tensile test pieces 4 needs to be kept consistent each time the test is carried out. In the existing test process, a clamping mold is usually used to keep the gap 41 consistent. However, the clamping mold is troublesome to use and has low efficiency. In the above embodiment, when the distance between the two tensile test pieces 4 is determined by a measuring tool, the fixed joint is placed at the joint of the two tensile test pieces 4, and the tensile test pieces 4 can be fixed by using the fixing plates 2 to ensure that the welding gap 41 between the two tensile test pieces 4 remains unchanged. The main body plate 1 is provided with a first hollow portion 11 providing a welding window, and the operator can weld the two tensile test pieces 4 through the hollow portion with solder paste. In addition, the first hollow portion 11 is configured to have no contact with the welding gap 41 for welding, so that during the welding process, the fixed joint will not be welded to the tensile test pieces 4 at the welding gap 41, avoiding the influence of the fixed joint on the solder paste tensile strength test.

[0029] In an embodiment, the fixing plate 2 and the tensile test piece 4 can be connected by spot welding. The solder joints between the fixing plate 2 and the tensile test piece 4 are easy to remove and will not affect the tensile strength test. The fixed joint after the solder joints are removed can be reused.

[0030] In an embodiment, the two fixing plates 2 and the main body plate 1 can be integrally provided.

[0031] In one embodiment, as Figure 4 shown, on the lower surface of each fixing plate 2, a plurality of pairs of fixing posts are sequentially arranged along the length direction of the fixing plate 2. Each pair of fixing posts includes two fixing posts 21A sequentially arranged along the width direction of the fixing plate 2. There is a gap for the tensile test piece 4 to pass through between the two fixing posts 21A, and this gap is less than or equal to the width of the corresponding area of the tensile test piece 4. The tensile test piece 4 can be clamped between the plurality of pairs of fixing posts, and it is difficult to move relative to the fixing plate 2, making it easier to assemble the fixing plate 2 and the tensile test piece 4.

[0032] As Figure 4 shown, the distance between the two fixing posts 21A of each pair of fixing posts gradually decreases from the end of the fixing plate 2 away from the hollow part to the end close to the hollow part, roughly forming a trumpet-shaped structure. Since the distance between the two fixing posts 21A gradually decreases, when the tensile test piece 4 is inserted between the plurality of pairs of fixing posts along the length direction of the fixing plate 2, its movable distance is limited and the tensile test piece 4 is blocked at the position where the distance between the two fixing posts 21A is the smallest, so that the movable distance of each tensile test piece 4 is equal. With this setting, the welding gap 41 between the two tensile test pieces 4 can be kept consistent even without measuring tools, reducing the assembly steps and improving the assembly efficiency.

[0033] Furthermore, as Figure 4 shown, the fixed joint further includes an auxiliary plate 3. The auxiliary plate 3 can be used to connect with the fixing plate 2 to clamp the tensile test piece 4 between the auxiliary plate 3 and the fixing plate 2. With this setting, not only can the tensile test piece 4 be fixed in the width direction of the fixing plate 2, but also the tensile test piece 4 can be fixed in the height direction of the fixing plate 2, so that the tensile test piece 4 can only move in the length direction of the fixing plate 2. The auxiliary plate 3 is provided with a mating hole 31 at a position corresponding to the fixing post 21A of the fixing plate 2. The fixing post 21A can be inserted into the mating hole 31 for the auxiliary plate 3 and the fixing plate 2 to be fixedly connected. After the tensile test piece 4 and the fixed joint are assembled, due to the function of the auxiliary plate 3, it is not easy to fall off or shift during the movement. In addition, the auxiliary plate 3 and the fixing plate 2 are correspondingly provided with connection holes 5, and the auxiliary plate 3 and the fixing plate 2 can be bolted through the connection holes 5 to further ensure the connection between the two. In this embodiment, the fixing plate 2 can be fixed to the tensile test piece 4 only by the auxiliary plate 3 and the pairs of fixing posts, or can be fixed in cooperation with spot welding.

[0034] A second hollow portion 32 is provided at a position on the auxiliary plate 3 corresponding to the first hollow portion 11 of the main body plate 1. The second hollow portion 32 exposes the welding gap 41 to the outside in the working state and has no contact with the welding gap 41. The setting of the second hollow portion 32 can also provide a welding window for the welding of the tensile test piece 4. At the same time, there is no contact between the second hollow portion 32 and the welding gap 41, which also avoids the main body plate 1 and the tensile test piece 4 being welded together and affecting the tensile test.

[0035] In another embodiment, as Figure 5 shown, the width of the fixing plate 2 gradually decreases from the end of the main body plate 1 away from the first hollow portion 11 to the end close to the first hollow portion 11, and the narrowest width of the fixing plate 2 is smaller than the width of the main body plate 1. As Figure 6 shown, arc-shaped walls 21B extending downward are provided on both edges of the lower surface of the fixing plate 2 along the width direction of the fixing plate 2.

[0036] The width between the two arc-shaped walls 21B gradually decreases from the end of the fixing plate 2 away from the first hollow portion 11 to the end close to the hollow portion, and also roughly forms a trumpet-shaped structure. Thus, when the tensile test piece 4 is arranged between the two fixing walls along the length direction of the fixing plate 2, its movable distance is limited and it is blocked by the arc-shaped walls 21B at the narrowest width between the two arc-shaped walls 21B of the tensile test piece 4 to control the movable distance of the tensile test piece 4. With such a setting, the welding gap 41 between the two tensile test pieces 4 in multiple tests can be made consistent without a measuring tool, reducing the assembly steps and improving the assembly efficiency.

[0037] In one embodiment, as Figure 7 shown, a horizontal supporting section 22 is provided at the lower edge of the arc-shaped wall 21B, which abuts against the lower surface of the tensile test piece 4, so as to be able to provide a supporting effect on the tensile test piece 4 arranged between the arc-shaped walls 21B. Thus, after the tensile test piece 4 and the fixing plate 2 are assembled, they can also be moved. In this embodiment, the fixing plate 2 can be fixed to the tensile test piece 4 only by the arc-shaped walls 21B and the horizontal supporting section 22, or can be further fixed by spot welding.

[0038] In summary, for the fixed joint for solder paste tensile strength testing of the present utility model, the fixing plate 2 can be detachably fixed to the tensile test piece 4, making the distance of the welding gap 41 between the two tensile test pieces 4 easier to determine and maintain. The first hollow portion 11 on the main body plate 1 provides a welding window and avoids the fixed joint affecting the tensile test. In addition, fixing columns or arc-shaped walls 21B can be provided on the fixing plate 2, which can improve the assembly rate of the tensile test piece 4 and the fixed joint and at the same time ensure that the distance of the welding gap 41 between the two tensile test pieces 4 remains consistent.

[0039] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0040] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fixed joint for solder paste tensile strength test, arranged at the ends to be welded of two tensile test pieces to be welded, and having a welding gap between the two ends to be welded, characterized in that: The fixed joint comprises: The main body plate is provided with a first hollow portion; Two fixing plates are arranged on both sides of the main body plate, and the two fixing plates are respectively detachably fixed to the vicinity of the ends to be welded of the two tensile test pieces; Wherein, the first hollow portion is configured to expose the welding gap to the outside world and has no contact with the welding gap in a working state.

2. The fixed joint for solder paste tensile strength testing according to claim 1, characterized in that: The fixing plate and the tensile test piece are connected by spot welding.

3. The fixed joint for solder paste tensile strength testing according to claim 1, characterized in that: A plurality of pairs of fixing columns are sequentially arranged on the lower surface of each fixing plate along the length direction of the fixing plate, each pair of fixing columns includes two fixing columns sequentially arranged along the width direction of the fixing plate, and the interval between the two fixing columns is less than or equal to the width of the corresponding area of ​​the tensile test piece.

4. The fixed joint for solder paste tensile strength testing according to claim 3, characterized in that: The distance between the two fixing columns of each fixing column pair gradually decreases from an end of the fixing plate away from the hollow portion to an end close to the hollow portion.

5. The fixed joint for solder paste tensile strength testing according to claim 3, characterized in that: The fixing joint further comprises an auxiliary plate, wherein the auxiliary plate is used to be connected to the fixing plate, and the tensile test piece is clamped between the auxiliary plate and the fixing plate.

6. The fixed joint for solder paste tensile strength testing according to claim 5, characterized in that: The auxiliary plate and the fixed plate are provided with matching holes at positions corresponding to the fixing columns of the fixed plate, and the fixing columns can be inserted into the matching holes; and / or, the auxiliary plate and the fixed plate are provided with connecting holes corresponding to each other for connecting the auxiliary plate and the fixed plate.

7. The fixed joint for solder paste tensile strength testing according to claim 5, characterized in that: A second hollow portion is provided on the auxiliary plate at a position corresponding to the first hollow portion of the main plate, and the second hollow portion is configured to expose the welding gap to the outside and have no contact with the welding gap in a working state.

8. The fixed joint for solder paste tensile strength testing according to claim 1, characterized in that: The width of the fixing plate gradually decreases from one end of the main body plate away from the hollow portion to one end close to the hollow portion, and the narrowest part of the width of the fixing plate is smaller than the width of the main body plate.

9. The fixed joint for solder paste tensile strength testing according to claim 8, characterized in that: Each fixing plate has two edges on the lower surface along the width direction of the fixing plate provided with arc-shaped walls extending downward.

10. The fixed joint for solder paste tensile strength testing according to claim 9, characterized in that: The lower edge of the arc-shaped wall is provided with a horizontal supporting section which abuts against the lower surface of the tensile test piece.

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