Detection tool for bonding strength of bimetal plate

Abstract

The utility model relates to the technical field of performance testing of bimetal plates, in particular to a detection tool for bonding strength of bimetal plates, which comprises a U-shaped seat and an upper template, a weighing sensor and a zigzag pressing plate are sequentially mounted at the bottom of the upper template, a plate sample block is placed on the inner side of the zigzag pressing plate, and a boss is arranged on one side of the plate sample block; the top of one side of the opening end of the U-shaped seat is a right-angle side, the boss is placed on the top of the opening end of the U-shaped seat, one side of the bottom of the boss is attached to the right-angle side, and the outer side of the zigzag pressing plate is movably connected with a limiting piece. During use, the boss is placed on the right-angle side, the position of the limiting piece is adjusted, the limiting piece is attached to the outer side of the zigzag-form pressing plate, the upper die plate drives the zigzag-form pressing plate to downwards extrude a plate sample block, the boss and the right-angle side are matched, the plate sample block is fixed, overall operation is simple, and follow-up detection operation is not affected; when multiple groups of experiments are carried out, the plate sample blocks can be quickly replaced, and meanwhile, other structures do not need to be additionally arranged for fixing the plate sample blocks.

Description

Technical Field

[0001] This utility model relates to the field of bimetallic sheet performance testing technology, specifically, to a testing fixture for the bonding strength of bimetallic sheets. Background Technology

[0002] Bimetallic sheets are composite materials made of two or more layers of metals with different properties, bonded together through precise processes such as hot rolling, cold rolling, fusion casting, or explosive welding. This layered structure allows bimetallic sheets to combine the superior properties of each component metal, such as extremely high hardness and excellent toughness, thus exhibiting exceptional adaptability and durability in harsh working environments.

[0003] There are many existing technologies for performance testing of bimetallic sheets, such as:

[0004] Chinese Patent Publication No. CN214066891U discloses a testing device for the bonding strength of bimetallic plates, comprising: an intermediate ball bearing mold frame, a sample clamping assembly, and a cutting tool. The intermediate ball bearing mold frame includes a horizontally arranged upper template and a lower template, which are movably connected by a movable connector, and the upper template can move up and down relative to the lower template. The upper end face of the lower template is provided with a positioning and fixing block, and the sample clamping assembly is installed on the positioning and fixing block for clamping the sample. The lower end face of the upper template is provided with a cutting tool fixing block, and the cutting tool is installed on the cutting tool fixing block for shearing the sample.

[0005] Therefore, most bimetallic sheet bonding strength testing devices include an upper template and a lower template. The sample is clamped between the upper and lower templates by a sample clamping assembly. A precision pressure testing machine is then used to push the upper template, thereby driving a cutting tool to cut the sample and measure the applied force. However, in order to ensure the accuracy of the experiment, multiple sets of test experiments are usually performed to eliminate errors. Each time this test experiment is performed, the sample clamping assembly must be fixed, which is quite troublesome. At the same time, although the sample needs to be fixed during cutting, there is no need to specially design a sample clamping assembly to achieve the fixation of the sample, which complicates the overall structure and increases the cost.

[0006] In view of this, we propose a testing fixture for the bonding strength of bimetallic sheets. Utility Model Content

[0007] The purpose of this invention is to provide a testing fixture for the bonding strength of bimetallic plates, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A fixture for testing the bonding strength of bimetallic sheets includes a U-shaped base and an upper template. A weighing sensor and a folded pressure plate are sequentially installed from top to bottom on the bottom of the upper template. A sheet sample to be tested is placed inside the folded pressure plate, and a protrusion is provided on one side of the sheet sample. The top of the side opposite the opening end of the U-shaped base is a right-angled edge. The protrusion is placed on the top of the opening end of the U-shaped base, and one side of the bottom of the protrusion is in contact with the right-angled edge. A limiting member is movably connected to the outside of the folded pressure plate, wherein the limiting member is in contact with the folded pressure plate. The upper template drives the folded pressure plate to vertically press the sheet sample until the protrusion is cut off by the right-angled edge.

[0010] As a further embodiment of this utility model: the limiting member includes an adjusting plate disposed in the recess of the U-shaped seat; the U-shaped seat is provided with a threaded hole on the side away from the folded pressure plate, and a limiting bolt is threadedly connected to the threaded hole, the limiting bolt passing through the threaded hole to one end face of the adjusting plate.

[0011] As a further embodiment of this utility model: the adjusting plate is provided with a positioning hole, and the U-shaped seat is also provided with a guide hole on the side away from the folded pressure plate, and a positioning pin is inserted into the positioning hole and the guide hole.

[0012] As a further embodiment of this utility model: a guide block is fixed on the outer side of the folded pressure plate, and a guide groove is provided on one side of the adjusting plate, with the guide block slidably connected in the guide groove.

[0013] As a further embodiment of this utility model, a transition plate is provided between the weighing sensor and the folded pressure plate.

[0014] As a further embodiment of this invention: the right-angled side is formed into a cutting edge through quenching treatment.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] In this bimetallic sheet bonding strength testing fixture, by placing the boss at the right-angled edge, the upper template drives the folded pressure plate to press the sheet sample downwards. With the boss and the right-angled edge, the sheet sample is fixed. The overall operation is simple and does not affect subsequent testing operations. When conducting multiple sets of experiments, the sheet sample can be quickly replaced without the need for additional structures to fix the sheet sample, thus reducing the overall equipment cost. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this scheme. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the structure of this scheme. Figure 2 ;

[0019] Figure 3This is a schematic diagram of the U-shaped seat structure in this scheme;

[0020] Figure 4 This is a schematic diagram of the adjustment block structure in this scheme;

[0021] Figure 5 This is a schematic diagram of the folded pressure plate structure of this scheme.

[0022] Figure 6 This is a schematic diagram of the sheet metal sample structure for this scheme.

[0023] The meanings of the labels in the diagram are as follows:

[0024] 1. U-shaped seat; 11. Guide hole; 12. Threaded hole; 13. Right-angled side; 2. Adjusting plate; 21. Positioning hole; 22. Guide groove; 3. Folded pressure plate; 31. Guide block; 4. Positioning pin; 5. Limit bolt; 6. Transition plate; 7. Weighing sensor; 8. Upper template; 9. Plate sample block; 91. Boss. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example

[0027] Currently, in the testing of the bonding strength of bimetallic plates, multiple sets of tests are usually conducted to eliminate errors. Each test requires fixing the sample with a sample clamping assembly, which is quite troublesome. Although the sample needs to be fixed during cutting, this does not mean that a special sample clamping assembly needs to be designed to fix the sample, which complicates the overall structure and increases the cost.

[0028] Therefore, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, the purpose of this embodiment is to provide a testing fixture for the bonding strength of bimetallic sheets. This fixture includes a U-shaped base 1 and an upper template 8. Considering the need to measure the applied force in real time, a weighing sensor 7 is installed at the bottom of the upper template 8. Since the sheet sample 9 to be tested needs to be kept in a fixed state during testing to avoid inaccurate data, a folded pressure plate 3 is installed at the bottom of the weighing sensor 7. The sheet sample 9 is placed inside the folded pressure plate 3. A boss 91 is provided on one side of the sheet sample 9. The top of the side opposite the opening end of the U-shaped base 1 is a right-angled edge 13. The boss 91 is placed at the top of the opening end of the U-shaped base 1, and one side of the bottom of the boss 91 is in contact with the right-angled edge 13. When the upper template 8 moves the folded pressure plate... When plate 3 moves downward, the top of plate sample 9 is pushed by the folded pressure plate 3, which, together with the right-angled edge 13 and the boss 91, fixes plate sample 9 in place. The overall operation is simple and does not affect subsequent testing operations. When conducting multiple sets of experiments, it is only necessary to drive the folded pressure plate 3 to lift synchronously to quickly replace plate sample 9 without adding other structures to fix plate sample 9, thus reducing the overall equipment cost. Considering that the boss 91 is too small, it is easy for the boss 91 to detach from the top of the U-shaped seat 1 during the pressing of plate sample 9. Therefore, the outer side of the folded pressure plate 3 is movably connected to a limiting component. The limiting component fits the folded pressure plate 3, so that the folded pressure plate 3 can only apply pressure to plate sample 9 from the vertical direction, thereby preventing the boss 91 from detaching from the top of the U-shaped seat 1.

[0029] Considering that the thickness of the sheet metal sample 9 may vary when conducting different bimetallic sheet bond strength tests, the relative positional relationship between the folded pressure plate 3 and the U-shaped seat 1 must also be adjusted accordingly. Therefore, please refer to... Figure 1 , Figure 3 and Figure 4 As shown, the limiting component includes an adjusting plate 2 set in the recess of the U-shaped seat 1. Threaded holes 12 are symmetrically opened on the side of the U-shaped seat 1 away from the folded pressure plate 3. The threaded holes 12 are threadedly connected to limiting bolts 5. The limiting bolts 5 pass through the threaded holes 12 to one end face of the adjusting plate 2. When the plate sample 9 is placed at the right angle side 13 through the boss 91, the adjusting plate 2 pushes the folded pressure plate 3 by rotating the limiting bolts 5, thereby making the folded pressure plate 3 close to the outside of the plate sample 9.

[0030] It should be noted that the plate sample 9 is not completely fitted with the folded pressure plate 3 and the U-shaped seat 1 to avoid the influence of lateral pressure that could cause errors in the data recorded by the weighing sensor 7. In order to save experimental time, the plate sample 9 can be manually pushed upwards for testing. When the plate sample 9 can move up and down normally when manually pushed, it can be determined that there is no influence of lateral pressure.

[0031] Since the adjusting plate 2 itself does not have a limit when moving, when the adjusting plate 2 is pushed by rotating the limiting bolt 5, the adjusting plate 2 may slide out of the concave part of the U-shaped seat 1. Therefore, the adjusting plate 2 is provided with a positioning hole 21, and the U-shaped seat 1 is provided with a guide hole 11 on the side away from the folded pressure plate 3. The positioning hole 21 and the guide hole 11 are connected with a positioning pin 4, which limits the moving direction of the adjusting plate 2.

[0032] To ensure uniform stress on plate sample 9, please refer to... Figure 4 and Figure 5 As shown, a guide block 31 is fixed on the outer side of the folded pressure plate 3, and a guide groove 22 is opened on one side of the adjusting plate 2. The guide block 31 is slidably connected in the guide groove 22. When the folded pressure plate 3 moves downward under external force, the sliding connection between the guide block 31 and the guide groove 22 limits the direction of movement of the folded pressure plate 3, so that the plate sample 9 is evenly stressed.

[0033] Considering the possibility that the load cell 7 and the folded pressure plate 3 may not be compatible, a transition plate 6 is provided between the load cell 7 and the folded pressure plate 3. The transition plate 6 enables the two devices to be connected smoothly. At the same time, the transition plate 6 also makes the whole device more stable, preventing the equipment from being damaged due to improper connection or vibration, thereby extending the service life of the equipment.

[0034] Considering that the right-angled edge 13 needs a certain hardness to cut the boss 91, the right-angled edge 13 is hardened to ensure its hardness, thereby forming the cutting edge.

[0035] In summary, the working principle of this solution is as follows:

[0036] Taking the bimetallic composition of plate sample 9 as steel and copper alloy as an example, the copper alloy layer in other parts of plate sample 9 is milled away by a milling machine, leaving the copper alloy layer in the middle to form a boss 91. The length L of the connection surface between the boss 91 and plate sample 9 is 15mm, and the width D is 2mm. Then, the boss 91 is placed above the right angle side 13, and the limiting bolt 5 is tightened. As the limiting bolt 5 is tightened, the adjusting plate 2 slowly approaches the folded pressure plate 3 under the limitation of the positioning pin 4 until the plate sample 9 is pressed against one side of the U-shaped seat 1, and the plate sample is pushed upward. The test is performed on block 9 to ensure that the plate sample block 9 can move up and down normally. Then, the upper template 8 is fixed to the output end of the hydraulic equipment. The output end of the hydraulic press drives the upper template 8 to move downward, so that the folded pressure plate 3 squeezes the plate sample block 9. At the same time, the display of the weighing sensor 7 begins to display data. As the pressure increases until the right-angled side 13 cuts off the boss 91 of the plate sample block 9, the display of the weighing sensor 7 will record the pressure peak F. Then, according to the formula P=F / S, S=L×D, the bonding strength between the copper alloy layer and the steel layer is calculated.

[0037] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. 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.

[0038] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A testing fixture for the bonding strength of bimetallic sheets, comprising a U-shaped base (1) and an upper template (8), characterized in that: The bottom of the upper template (8) is equipped with a weighing sensor (7) and a folded pressure plate (3) from top to bottom. The plate sample (9) to be tested is placed on the inner side of the folded pressure plate (3). A boss (91) is provided on one side of the plate sample (9). The top of the side opposite the opening end of the U-shaped seat (1) is a right angle side (13). The boss (91) is placed on the top of the opening end of the U-shaped seat (1), and the bottom side of the boss (91) is in contact with the right angle side (13). A limiting member is movably connected to the outer side of the folded pressure plate (3). The limiting member is in contact with the folded pressure plate (3). The upper template (8) drives the folded pressure plate (3) to vertically press the plate sample (9) until the boss (91) is cut off by the right angle side (13).

2. The testing fixture for the bonding strength of bimetallic plates according to claim 1, characterized in that: The limiting component includes an adjusting plate (2) disposed in the recess of the U-shaped seat (1); the U-shaped seat (1) is provided with a threaded hole (12) on the side away from the folded pressure plate (3), the threaded hole (12) is threadedly connected to a limiting bolt (5), the limiting bolt (5) passes through the threaded hole (12) to one end face of the adjusting plate (2).

3. The testing fixture for the bonding strength of bimetallic plates according to claim 2, characterized in that: The adjusting plate (2) is provided with a positioning hole (21), and the U-shaped seat (1) is also provided with a guide hole (11) on the side away from the folded pressure plate (3). The positioning hole (21) and the guide hole (11) are connected with positioning pins (4).

4. The testing fixture for the bonding strength of bimetallic plates according to claim 2, characterized in that: A guide block (31) is fixed on the outside of the folded pressure plate (3), and a guide groove (22) is provided on one side of the adjusting plate (2). The guide block (31) is slidably connected in the guide groove (22).

5. The testing fixture for the bonding strength of bimetallic plates according to claim 1, characterized in that: A transition plate (6) is provided between the weighing sensor (7) and the folded pressure plate (3).

6. The testing fixture for the bonding strength of bimetallic plates according to claim 1, characterized in that: The right-angled side (13) is formed into a cutting edge through quenching treatment.

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