A bonding force testing device and method for bimetallic materials

Abstract

The present application relates to a kind of binding force testing device of bimetal material, including press, binding force measurement module and hydraulic system;Binding force measurement module is by pedestal, pressing block, shear component;Pedestal is recessed shape with opening upward, with two limiting side walls, shear limiting hole is arranged in the lower edge of the limiting side wall near left part at the bottom of recess, style installation groove is arranged in the right side of shear limiting hole, the left side of style installation groove and the right side of shear limiting hole form shear limiting edge by intersection;Pressing block is recessed shape with opening left, with installation positioning surface and shear limiting groove;Pressing block is connected and fixed with the recess of pedestal, the recess of pressing block and the limiting side wall of left part of pedestal form a containing space, shear component is installed in the containing space.It is also related to a kind of binding force testing method of bimetal material.It can be in quantitative or qualitative way to evaluate the binding state of bimetal material, provide basis for adjusting the composite process parameters of bimetal material.

Description

Technical Field

[0001] This invention relates to the characterization of composite metal materials, specifically to a device and method for testing the bonding strength of bimetallic materials. Background Technology

[0002] Bimetallic material blanks are produced by combining two alloys using a composite technology. Due to the influence of various process parameters, the bonding state of the two materials varies greatly between different batches. The bonding state directly affects the quality of products made using this bimetallic material. Therefore, it is necessary to measure the bonding force of the bimetallic material to adjust various process parameters based on the measurement results. Thus, it is necessary to develop a bonding force testing device and method for composite metallic materials.

[0003] CN110940585A discloses a method for determining the interfacial bonding force between a composite material reinforcement and a matrix, which relates to the field of composite material performance characterization technology. This method directly obtains the interfacial shear strength of the reinforcement detaching from the matrix and calculates the interfacial bonding force between the reinforcement and the matrix using a formula, thereby improving the accuracy and simplicity of composite material interfacial bonding force measurement. The method includes: S1, cutting the composite material into thin slices; S2, pre-treating the thin slices to make their surface smooth; S3, placing the thin slices in the interlayer of a sandwich worktable, using a nano-indentation indenter to press the reinforcement out of the matrix from the thin slices, while simultaneously using a sensor to measure the interfacial shear strength of the reinforcement detaching from the matrix; S4, calculating the interfacial bonding force between the composite material reinforcement and the matrix according to a formula. The provided technical solution is applicable to the process of determining the interfacial bonding force between the composite material reinforcement and the matrix.

[0004] CN212059680U discloses a "testing device for the bonding force of metallurgical composite steel pipes," comprising a base, a clamping seat, and a positioning block; a gap exists between the clamping seat and the positioning block, forming an accommodating space; one end of the clamping seat is a first arc-shaped positioning surface adapted to the outer wall of the composite steel pipe sample; one end of the positioning block is a second arc-shaped positioning surface adapted to the inner wall of the composite steel pipe sample; the positioning block also has a positioning part; when the composite steel pipe sample is installed in the accommodating space, and the bottom of the corrosion-resistant alloy layer abuts against the positioning part, the upper end of the composite steel pipe sample protrudes from the upper end face of the clamping seat. It uses the first and second arc-shaped positioning surfaces adapted to the inner and outer diameters of the metallurgical composite steel pipe for bonding force testing, without causing damage or extrusion deformation to the metallurgical composite steel pipe. The testing device is simple, reliable, and effective.

[0005] Undoubtedly, the technical solutions disclosed in the two patent documents mentioned above are beneficial attempts in their respective technical fields. Summary of the Invention

[0006] The purpose of this invention is to provide a bonding strength testing device for bimetallic materials, which can quantitatively or qualitatively evaluate the bonding state of bimetallic materials, providing a basis for adjusting the composite process parameters of bimetallic materials. This invention also provides...

[0007] This method for testing the bonding strength of bimetallic materials.

[0008] The present invention discloses a bonding force testing device for bimetallic materials, comprising a press, a bonding force measuring module disposed on the worktable of the press and corresponding to the press head, and a hydraulic system. The bonding force measuring module comprises a base, a pressure block, and a shearing assembly. The base is a groove-shaped structure with an upward opening and has two limiting sidewalls. A long strip-shaped shearing limiting hole is provided on the lower side of the limiting sidewall near the left side of the bottom of the groove. A rectangular pattern mounting groove is provided on the right side of the shearing limiting hole, and the left side of the pattern mounting groove intersects with the right side of the shearing limiting hole to form a shearing limiting edge. The pressure block is a groove-shaped structure with a left-opening opening and has a mounting positioning surface and a shearing limiting groove. The pressure block mates with the groove of the base and is fixed by three bolts. The groove of the pressure block and the limiting sidewall on the left side of the base form a receiving space, and the shearing assembly is installed within this receiving space.

[0009] Furthermore, the shearing assembly includes a shearing block, two guide posts, a loading block, and a loading ball; the shearing block is cuboid in shape with both ends protruding downwards to form limiting surfaces, the upper part being a sensor mounting surface, and the lower part being a shearing surface; threaded holes are provided at both ends of the sensor mounting surface, and the middle part of the sensor mounting surface is used to install a pressure sensor; the guide post has a guide section in the middle, a connecting thread section at the bottom, a fastening thread section at the top, and a tightening groove at the top end; the connecting thread sections at the bottom of the two guide posts are respectively connected to the two threaded holes on the shearing block; the guide sections and fastening thread sections of the two guide posts of the loading block are connected to each other.

[0010] Furthermore, the loading block is rectangular in shape, with its lower surface corresponding to the sensor mounting surface of the shear block and in contact with the pressure sensor; both ends of the loading block are coaxially provided with countersunk holes and bearing holes that pass through the upper and lower surfaces, respectively; the upper part of the loading block is provided with a conical groove, and the loading ball is disposed in the conical groove; a linear bearing is provided in the bearing hole, and the linear bearing cooperates with the guide section of the guide post; the fastening thread section of the guide post passes through the countersunk hole on the loading block and is connected and fastened with a nut; the lower end of the bearing hole is provided with a retaining ring groove, and the upper end is provided with a washer groove; an elastic retaining ring is provided in the retaining ring groove, and a washer is provided in the washer groove.

[0011] Furthermore, the hydraulic system includes a high-pressure pump unit, a filter connected to the high-pressure pump unit via hydraulic lines, a check valve connected to the filter via hydraulic lines, a three-position four-way solenoid valve with its P-end connected to the check valve via hydraulic lines, and a loading hydraulic cylinder. The rodless chamber of the loading hydraulic cylinder is connected to the A-end of the three-position four-way solenoid valve via hydraulic lines, and the rod-side chamber of the loading hydraulic cylinder is connected to the B-end of the three-position four-way solenoid valve via hydraulic lines. A first pressure regulating valve and a first pressure gauge are provided in the hydraulic lines connecting the rodless chamber of the loading hydraulic cylinder to the A-end of the three-position four-way solenoid valve. A second pressure regulating valve and a second pressure gauge are provided in the hydraulic lines connecting the rodless chamber of the loading hydraulic cylinder to the B-end of the three-position four-way solenoid valve. A third pressure regulating valve is provided in the hydraulic lines connecting the filter and the check valve. The piston rod of the loading hydraulic cylinder is connected to a pressure head mounted on a press, and the pressure head is in corresponding contact with a loading ball mounted on a loading block.

[0012] The bonding strength testing method for bimetallic materials according to the present invention, performed in the aforementioned bonding strength testing device for bimetallic materials, includes the following steps:

[0013] The first step is to prepare the test specimens. Prepare six test specimens with dimensions of 50mm×20mm×1mm, with the 50mm side being the shear length. Among them, there are two single alloy test specimens made of softer alloy (no further calibration is required after the initial calibration) and four bi-alloy test specimens, which are test specimens composed of a combination of a harder alloy and a softer alloy.

[0014] The second step is to install the bonding force measurement module; first check the condition of the press, then install the bonding force measurement module on the press's worktable; and align the loading ball on the bonding force measurement module with the pressure head on the press.

[0015] The third step is to place the single alloy sample; first, place the single alloy sample made of a softer alloy into the sample mounting slot of the base of the bonding force measurement module; then connect the pressure block to the base.

[0016] The fourth step is to install the shearing assembly. Place the shearing assembly into the cavity formed by the base and the pressure block, and ensure that it can move up and down so that the shearing surface of the shearing block contacts the single alloy sample. Clear the detection value of the pressure sensor connected to the industrial control computer and confirm that the loading ball has been installed in the conical groove of the loading block.

[0017] Step 5: Loading the ball; Adjust the three-position four-way solenoid valve to the A-P port connection position, start the high-pressure pump group, so that the high-pressure oil enters the rodless chamber of the loading hydraulic cylinder (84), and the piston rod extends to push the press head of the press to contact the loading ball and perform loading;

[0018] Step 6: Loading ball unloading; after the pressure sensor detects the pressure peak F01, adjust the three-position four-way solenoid valve 20 to the B-T port connection position, retract the piston rod of the loading hydraulic cylinder, and remove the softer alloy sample.

[0019] Step 7: Replace the single alloy sample; replace the tested single alloy sample with another single alloy sample, so that the joint surface of the dual alloy sample extends 0.1 to 0.3 mm beyond the shear edge; repeat steps 3 to 6 to obtain the peak value F02.

[0020] Step 8: Install the bialloy specimens; replace the tested single alloy specimens with a bialloy specimen, and repeat steps 3 to 6 until all four bialloy specimens are tested, obtaining peak values ​​F11, F12, F13, and F14 respectively.

[0021] Step 9: Calculate the test results: Base force F0 = (F01 + F02) / 2; Test force F1 = (F11 + F12 + F13 + F14) / 4; Bonding state coefficient X = (F1 / F0) × 100%, used to evaluate the bonding strength of bimetallic materials.

[0022] The beneficial effects of this invention are as follows: By using the ratio of the shear force at the joint of the bimetallic sample to the shear force of the single alloy sample to obtain the joint state coefficient X, the joint state of the bimetallic material is evaluated, thus solving the problem of evaluating the joint state of the bimetallic material and providing a reliable basis for adjusting the composite process parameters of bimetallic materials. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the bonding force measuring module of the present invention installed on a press;

[0024] Figure 2 Schematic diagram of the bonding force measurement module;

[0025] Figure 3 yes Figure 2 Top view;

[0026] Figure 4 yes Figure 3 Sectional view A-A;

[0027] Figure 5 This is a schematic diagram of the base structure of the bonding force measurement module;

[0028] Figure 6 This is a schematic diagram of the pressure block structure of the bonding force measurement module;

[0029] Figure 7 This is a schematic diagram of the shear component structure of the bonding force measurement module;

[0030] Figure 8 yes Figure 7 B-B sectional view;

[0031] Figure 9 This is a schematic diagram of the shear block structure of the shearing component;

[0032] Figure 10 This is a schematic diagram of the guide post structure of the shear assembly;

[0033] Figure 11 This is a schematic diagram of the loading block structure of the shearing component;

[0034] Figure 12 This is a schematic diagram of the hydraulic system of the present invention;

[0035] Figure 13 This is a schematic diagram of the sample structure.

[0036] In the diagram (the markings refer to the technical features):

[0037] 1—Press machine, 11—Press head, 12—Worktable;

[0038] 2—Binding force measurement module;

[0039] 3—Bialloy specimen, 31—Harder alloy, 32—Softer alloy, 33—Matching surface;

[0040] 4—Base, 41—Shearing limiting hole, 42—Shearing limiting edge, 43—Style mounting groove, 44—Limiting sidewall;

[0041] 5—Pressure block, 51—Installation positioning surface, 52—Shearing limiting groove;

[0042] 6—Cut component;

[0043] 61—Shearing block, 611—Sensor mounting surface, 612—Threaded hole, 613—Shearing surface, 614—Limiting surface;

[0044] 62—Guide post, 621—Guide section, 622—Connecting threaded section, 623—Fastening threaded section, 624—Tightening groove;

[0045] 63—Pressure sensor;

[0046] 64—Loading block, 641—Counterpart hole, 642—Celestial groove, 643—Bearing hole, 644—Retaining ring groove, 645—Washer groove;

[0047] 65—Nut, 66—Loading ball, 67—Elastic retaining ring, 68—Linear bearing, 69—Washer;

[0048] 7— Bolt;

[0049] 8—Hydraulic system, 80—High-pressure pump set, 81—Filter, 82—Check valve, 83—Three-position four-way solenoid valve, 84—Loading hydraulic cylinder, 85—First pressure regulating valve, 86—Second pressure regulating valve, 87—Third pressure regulating valve, 88—First pressure gauge, 89—Second pressure gauge. Detailed Implementation

[0050] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0051] See Figures 1 to 12 The device for testing the bonding strength of bimetallic materials includes a press 1, a bonding strength measuring module 2 mounted on the press workbench 12 and corresponding to the press head 11, and a hydraulic system 8. The bonding strength measuring module 2 is characterized by comprising a base 4, a pressure block 5, and a shearing assembly 6. The base 4 is a groove-shaped structure with an upward opening, having two limiting sidewalls 44. A long strip-shaped shearing limiting hole 41 is provided on the lower side of the limiting sidewall 44 near the left side of the bottom of the groove. A rectangular pattern mounting groove 43 is provided on the right side of the shearing limiting hole 41, and the left side of the pattern mounting groove 43 intersects with the right side of the shearing limiting hole 41 to form a shearing limiting edge 42. The pressure block 5 is a groove-shaped structure with a left-opening opening, having a mounting positioning surface 51 and a shearing limiting groove 52. The pressure block 5 mates with the groove of the base 4 and is fixed by three bolts 7. The groove of the pressure block 5 and the limiting sidewall 44 on the left side of the base 4 form a receiving space, and the shearing assembly 6 is installed within this receiving space.

[0052] The shearing assembly 6 includes a shearing block 61, two guide posts 62, a loading block 64, and a loading ball 66. The shearing block 61 is rectangular in shape with both ends protruding downwards to form a limiting surface 614, a sensor mounting surface 611 on top, and a shearing surface 613 on the bottom. The shearing surface is surface hardened to improve its surface strength. Threaded holes 612 are provided at both ends of the sensor mounting surface 611, and a pressure sensor 63 is installed in the middle of the sensor mounting surface 611. The guide post 62 has a guide section 621 in the middle, a connecting threaded section 622 at the bottom, a fastening threaded section 623 at the top, and a tightening groove 624 at the top. The connecting threaded sections 622 at the bottom of the two guide posts 62 are respectively connected to the two threaded holes 612 on the shearing block 61. The guide section 621 and the fastening threaded section 623 of the two guide posts 62 are connected to the loading block 64.

[0053] The loading block 64 is rectangular, with its lower surface corresponding to the sensor mounting surface 611 of the shear block 61 and in contact with the pressure sensor 63. The two ends of the loading block 64 are coaxially provided with a countersunk hole 641 and a bearing hole 643, respectively, penetrating both the upper and lower surfaces. A conical groove 642 is provided in the middle of the upper part of the loading block 64, and the loading ball 66 is disposed within the conical groove 642. A linear bearing 68 is provided within the bearing hole 643, and the linear bearing 68 cooperates with the guide section 621 of the guide post 62. The fastening threaded section 623 of the guide post 62 passes through the countersunk hole 641 on the loading block 64 and is connected and fastened with a nut 65. The lower end of the bearing hole 643 is provided with a retaining ring groove 644, and the upper end is provided with a washer groove 645. An elastic retaining ring 67 is provided within the retaining ring groove 644, and a washer 69 is provided within the washer groove 645.

[0054] Hydraulic system 8 includes a high-pressure pump assembly 80, a filter 81 connected to the high-pressure pump assembly via hydraulic lines, a check valve 82 connected to the filter via hydraulic lines, a three-position four-way solenoid valve 83 with its P-end connected to the check valve via hydraulic lines, and a loading hydraulic cylinder 84. The rodless chamber of the loading hydraulic cylinder 84 is connected to the A-end of the three-position four-way solenoid valve 83 via hydraulic lines, and the rod chamber of the loading hydraulic cylinder 84 is connected to the B-end of the three-position four-way solenoid valve 83 via hydraulic lines. A first pressure regulating valve 85 and a first pressure gauge 88 are provided in the hydraulic pipeline connected to the A end of the solenoid valve 83. A second pressure regulating valve 86 and a second pressure gauge 89 are provided in the hydraulic pipeline connected to the rodless chamber of the loading hydraulic cylinder 84 and the B end of the three-position four-way solenoid valve 83. A third pressure regulating valve 87 is provided in the hydraulic pipeline between the filter 81 and the check valve 82. The piston rod of the loading hydraulic cylinder 84 is connected to the pressure head 11 mounted on the press 1. The pressure head 11 is in corresponding contact with the loading ball 66 mounted on the loading block 64.

[0055] The present invention discloses a method for testing the bonding strength of bimetallic materials, characterized in that the test is performed on a bimetallic material bonding strength testing device as described above, and includes the following steps:

[0056] See Figure 13 The first step is to prepare the test specimens. Prepare six test specimens with dimensions of 50mm×20mm×1mm, with the 50mm side being the shear length. Among them, two single alloy test specimens made of softer alloy 32 are calibrated once and will not be calibrated again. There are four bi-alloy test specimens, which are test specimens composed of a combination of harder alloy 31 and softer alloy 32.

[0057] The second step is to install the bonding force measurement module; first check the status of the press 1, then install the bonding force measurement module 2 on the worktable 12 of the press 1; and align the loading ball 66 on the bonding force measurement module 2 with the pressure head 11 on the press 1.

[0058] The third step is to place the single alloy sample. First, place the single alloy sample made of the softer alloy 32 into the sample mounting slot 43 of the base 4 of the bonding force measurement module 2. Then connect the pressure block 5 to the base 4. First, pre-tighten the bolts on both sides of the softer alloy 32 sample, and then tighten the remaining bolt.

[0059] The fourth step is to install the shearing assembly. Place the shearing assembly 6 into the cavity formed by the base 4 and the pressure block 5, and allow it to move up and down so that the shearing surface 613 of the shearing block 61 contacts the single alloy sample. Clear the detection value of the pressure sensor 63 connected to the industrial control computer and confirm that the loading ball 66 has been installed in the conical groove 642 of the loading block 64.

[0060] See Figure 12 Fifth step, loading ball loading; adjust the three-position four-way solenoid valve 83 to the A-P port connection position, start the high pressure pump group 80, so that high pressure oil enters the rodless chamber of the loading hydraulic cylinder 84, the piston rod extends to push the pressure head 11 of the press machine 1 to contact the loading ball 66 and perform loading;

[0061] Step 6: Loading ball unloading; after the pressure sensor 63 detects the pressure peak F01, adjust the three-position four-way solenoid valve 20 to the B-T port connection position, retract the piston rod of the loading hydraulic cylinder 84, and remove the softer alloy sample.

[0062] Step 7: Replace the single alloy sample; replace the tested single alloy sample with another single alloy sample, so that the joint surface 33 of the double alloy sample extends 0.1 to 0.3 mm beyond the shear edge; repeat steps 3 to 6 to obtain the peak value F02.

[0063] Step 8: Install the bialloy specimens; replace the tested single alloy specimens with a bialloy specimen, and repeat steps 3 to 6 until all four bialloy specimens 3 are tested, obtaining peak values ​​F11, F12, F13, and F14 respectively.

[0064] Step 9: Calculate the test results: Base force F0 = (F01 + F02) / 2; Test force F1 = (F11 + F12 + F13 + F14) / 4; Bonding state coefficient X = (F1 / F0) × 100%, used to evaluate the bonding strength of bimetallic materials.

[0065] The bonding state coefficient X, obtained by comparing the shear force at the joint of bialloy specimens with that of single-alloy specimens, is used to evaluate the bonding state of the joint in bialloy materials. This solves the problem of evaluating the bonding state of joints in bialloy materials.

Claims

1. A method for testing the bonding strength of bimetallic materials, characterized in that, The bonding force testing method for bimetallic materials is implemented using a bonding force testing device for bimetallic materials. The bonding force testing device for bimetallic materials includes a press (1), a bonding force measuring module (2) set on the worktable (12) of the press and corresponding to the press head (11), and a hydraulic system (8). The bonding force measuring module (2) is characterized by being composed of a base (4), a pressure block (5), and a shearing assembly (6). The base (4) is a groove with an upward opening and has two limiting sidewalls (44). A long strip shearing assembly is provided on the lower side of the limiting sidewall (44) near the left side of the bottom of the groove. A shearing limiting hole (41) is provided on the right side of the shearing limiting hole (41), and a rectangular pattern mounting groove (43) is provided on the right side of the pattern mounting groove (43). The left side of the pattern mounting groove (43) intersects with the right side of the shearing limiting hole (41) to form a shearing limiting edge (42). The pressure block (5) is a groove shape with an opening to the left, and has a mounting positioning surface (51) and a shearing limiting groove (52). The pressure block (5) is fitted with the groove of the base (4) and is connected and fixed by three bolts (7). The groove of the pressure block (5) and the limiting side wall (44) on the left side of the base (4) form a receiving space. The shearing assembly (6) is installed in this receiving space. The shearing assembly (6) includes a shearing block (61), two guide posts (62), a loading block (64), and a loading ball (66); the shearing block (61) is rectangular in shape with both ends protruding downwards to form limiting surfaces (614), the upper part is a sensor mounting surface (611), and the lower part is a shearing surface (613); threaded holes (612) are provided at both ends of the sensor mounting surface (611), and the middle part of the sensor mounting surface (611) is used to install a pressure sensor ( 63); the guide post (62) has a guide section (621) in the middle, a connecting thread section (622) at the bottom, a fastening thread section (623) at the top, and a tightening groove (624) at the top end; the connecting thread sections (622) at the bottom of the two guide posts (62) are respectively connected to the two threaded holes (612) on the shear block (61); the loading block (64) is connected to the guide sections (621) and fastening thread sections (623) of the two guide posts (62); The loading block (64) is rectangular, with its lower surface corresponding to the sensor mounting surface (611) of the shear block (61) and in contact with the pressure sensor (63). The two ends of the loading block (64) are coaxially provided with countersunk holes (641) and bearing holes (643) that penetrate the upper and lower surfaces, respectively. A conical groove (642) is provided in the middle of the upper part of the loading block (64), and the loading ball (66) is located within the conical groove (642). A linear bearing (68) is provided within the bearing hole (643), and the linear bearing (68) is connected to the guide post (…). The guide section (621) of the guide post (62) is engaged, and the fastening thread section (623) of the guide post (62) passes through the countersunk hole (641) on the loading block (64) and is engaged with the nut (65) for fastening; the lower end of the bearing hole (643) is provided with a retaining ring groove (644) and the upper end is provided with a washer groove (645). An elastic retaining ring (67) is provided in the retaining ring groove (644), and a washer (69) is provided in the washer groove (645); the hydraulic system (8) includes a high-pressure pump group (80) and a filter connected to the high-pressure pump group through a hydraulic pipeline ( 81) A check valve (82) connected to the filter via a hydraulic line, and a three-position four-way solenoid valve (83) whose P end is connected to the check valve via a hydraulic line, also including a loading hydraulic cylinder (84). The rodless chamber of the loading hydraulic cylinder (84) is connected to the A end of the three-position four-way solenoid valve (83) via a hydraulic line, and the rod chamber of the loading hydraulic cylinder (84) is connected to the B end of the three-position four-way solenoid valve (83) via a hydraulic line. A hydraulic line connecting the rodless chamber of the loading hydraulic cylinder (84) to the A end of the three-position four-way solenoid valve (83) is provided with... A first pressure regulating valve (85) and a first pressure gauge (88) are provided. A second pressure regulating valve (86) and a second pressure gauge (89) are provided in the hydraulic pipeline connecting the rod chamber of the loading hydraulic cylinder (84) to the B end of the three-position four-way solenoid valve (83). A third pressure regulating valve (87) is provided in the hydraulic pipeline connecting the filter (81) and the check valve (82). The piston rod of the loading hydraulic cylinder (84) is connected to the pressure head (11) installed on the press (1). The pressure head (11) is in corresponding contact with the loading ball (66) installed on the loading block (64). The bonding strength test method for the bimetallic material includes the following steps: The first step is to prepare the test specimens. Six test specimens are prepared according to the size of 50mm×20mm×t1mm, with the 50mm side being the shear length. Among them, there are two single alloy test specimens made of softer alloy (32) and four double alloy test specimens (3), which are test specimens composed of a combination of harder alloy (31) and softer alloy (32). The second step is to install the bonding force measurement module; first check the status of the press (1), then install the bonding force measurement module (2) on the worktable (12) of the press (1); and align the loading ball (66) on the bonding force measurement module (2) with the pressure head (11) on the press (1); The third step is to place the single alloy sample; first, place the single alloy sample made of a softer alloy (32) into the sample mounting slot (43) of the base (4) of the bonding force measurement module (2); then connect the pressure block (5) to the base (4). Fourth step, install the shearing assembly; place the shearing assembly (6) into the cavity formed by the base (4) and the pressure block (5), and move it up and down so that the shearing surface (613) of the shearing block (61) contacts the single alloy sample, clear the detection value of the pressure sensor (63) connected to the industrial control computer, and confirm that the loading ball (66) has been installed in the conical groove (642) of the loading block (64); Fifth step, loading ball loading; adjust the three-position four-way solenoid valve (83) to the A-P port connection position, start the high pressure pump group (80) to make high pressure oil enter the rodless chamber of the loading hydraulic cylinder (84), the piston rod extends to push the pressure head (11) of the press (1) to contact the loading ball (66) and load it; Step 6, unload the loading ball; after the pressure sensor (63) detects the pressure peak F01, adjust the three-position four-way solenoid valve (83) to the B-T port connection position, retract the piston rod of the loading hydraulic cylinder (84), and take out the softer alloy sample; Step 7: Replace the single alloy sample; replace the tested single alloy sample with another single alloy sample so that the joint surface (33) of the double alloy sample extends 0.1 to 0.3 mm beyond the shear edge; repeat steps 3 to 6 to obtain the peak value F02. Step 8: Install the bialloy specimen; replace the tested single alloy specimen with a bialloy specimen, repeat steps 3 to 6 until all four bialloy specimens (3) are completed, and obtain peak values ​​F11, F12, F13 and F14 respectively. Step 9: Calculate the test results: Base force F0 = (F01 + F02) / 2; Test force F1 = (F11 + F12 + F13 + F14) / 4; Bonding state coefficient X = (F1 / F0) × 100%, used to evaluate the bonding strength of bimetallic materials.

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