A corrosion-resistant IGBT aluminum wire tensile test device

Abstract

The invention relates to an aluminum wire tensile test device for corrosion-resistant IGBT, and to the technical field of tensile tests; it comprises an aluminum wire for corrosion-resistant IGBT, and also comprises an aluminum wire tensile test device, which comprises a tensile platform, a limiter is arranged on the surface of the tensile platform, and a tensile detector for controlling the aluminum wire on the limiter to be stretched is arranged in the tensile platform; firstly, the limiter can effectively improve the clamping stability of the aluminum wire, effectively reduce the damage rate of its deformation, and can also ensure the performance of the aluminum wire during the tensile test, and avoid the situation that the aluminum wire always breaks in the clamping area during the stretching process; secondly, the tensile detector can effectively ensure the diversity and applicability of the aluminum wire tensile test when the aluminum wire is subjected to the tensile test, and avoid the randomness of the aluminum wire tensile test result; it can not only realize the tensile performance of the aluminum wire tensile test, but also ensure the tensile performance of the aluminum wire under different tensile speeds.

Description

Technical Field

[0001] The invention relates to the technical field of tensile testing, and in particular to an aluminum wire tensile testing device for corrosion-resistant IGBT. Background Art

[0002] IGBT is a three-terminal semiconductor switching device that is widely used in high voltage and high current applications, such as in industry, consumer electronics and automobiles. Corrosion-resistant IGBT aluminum wire is an aluminum wire commonly used in IGBT packaging, which has good corrosion resistance.

[0003] When corrosion-resistant aluminum wire is used in IGBT, certain performance requirements are imposed on it. Therefore, a tensile test device is usually required to test the performance of the aluminum wire. It is mainly used to measure the tensile strength, tensile strength, breaking force, elongation and other parameters of the aluminum wire.

[0004] For example, a Chinese patent with publication number CN219657380U discloses a stretching tool for aluminum wire tensile testing, which relates to the field of wire drawing stretching clamping technology, including a test base plate, a clamping guide ring is clamped and installed on the upper side of the test base plate, a sealing guide plate is slidably connected to the inner side of the clamping guide ring, an external sliding rod is clamped and installed on the surface of the sealing guide plate, and one end of the external sliding rod away from the sealing guide plate is slidably connected to the inner side of the clamping guide ring. In the stretching tool for aluminum wire tensile testing, the sealing guide plate is reset under the push of the elastic performance of the compressed first spring, so the sealing guide plate forms a blocking limit to the docking groove, which makes it easy to clamp and install the aluminum wire before the tensile test, and also ensures the efficiency of the installation operation when the aluminum wire is tensile tested, reducing the need to tie knots and bind on the stretching tool during traditional aluminum wire stretching, as well as the cumbersomeness of untying the stretched aluminum wire after the test.

[0005] However, the above tensile test device still has some shortcomings in actual use:

[0006] 1. In the above-mentioned prior art, when the aluminum wire is stretched, the clamping stability of the stretching tooling is poor. The aluminum wire is easily deformed during the clamping process, resulting in the tensile performance of the clamped area of ​​the aluminum wire being significantly weaker than that of other areas of the aluminum wire. As a result, when the aluminum wire is stretched, the aluminum wire often breaks in the clamping area; further, during the tensile test of the aluminum wire, the accuracy of the test results is affected.

[0007] 2. Secondly, in the prior art, when aluminum wire is subjected to a tensile test, the ultimate tensile strength of the aluminum wire is usually tested. The tensile test has a certain degree of singleness, and there is a lack of a control group when the aluminum wire is subjected to a tensile test, which easily leads to a certain degree of randomness in the test results.

[0008] Therefore, based on the above-stated viewpoints, there is still room for improvement in the existing tensile testing devices. Summary of the invention

[0009] In order to solve the above problems, the present invention provides a tensile test device for aluminum wire for corrosion-resistant IGBT, which adopts the following technical solution:

[0010] A corrosion-resistant IGBT aluminum wire tensile testing device comprises an aluminum wire, wherein the aluminum wire is provided with a substrate layer and a protective layer in sequence from the inside to the outside. The corrosion-resistant IGBT aluminum wire tensile testing device comprises a stationary tensile platform, a surface of the tensile platform is provided with a limit piece for clamping and limiting the aluminum wire protective layer, and the interior of the tensile platform is provided with a tensile detector for controlling the stretching of the aluminum wire substrate layer on the limit piece.

[0011] Preferably, the limiting member includes a clamping plate and three movable plates arranged along the length direction of the stretching platform, and the three movable plates are evenly spaced along the length direction of the stretching platform. Winding rollers for winding the aluminum wire are evenly installed on the clamping plate, and the three movable plates are also respectively provided with winding rollers for winding the aluminum wire, and the winding rollers on the clamping plate correspond one by one to the winding rollers on the three groups of movable plates.

[0012] The winding roller is symmetrically provided with limit clamps for clamping the aluminum wire protective layer on both sides, and the bottoms of the two limit clamps are hinged with connecting rods, and the end of the connecting rod away from the limit clamps is arranged on the connecting block, and the connecting block is slidably arranged in the clamping plate and the movable plate, and the clamping plate and the movable plate are rotatably provided with locking screws corresponding to the position of the connecting block, and the connecting block is threadedly connected with the locking screw.

[0013] Preferably, the stretching detector includes three groups of rotating parts corresponding to the winding rollers arranged at the bottom of the stretching platform, each group of rotating parts includes two symmetrically distributed stretching shafts, and the two stretching shafts are sleeved with stretching belts. The three stretching belts on the stretching platform are connected to the three movable plates one by one through synchronization blocks, and a strip stretching groove for the movement of the synchronization block is opened on the stretching platform.

[0014] A driving column is rotatably provided on one side of the stretching platform, and a driving motor is connected to one side of the driving column. The driving motor is arranged on one side of the stretching platform through a motor seat, and the driving column rotatably passes through two stretching shafts on the same side and is connected to the driving column in the middle of the stretching platform.

[0015] Preferably, a speed control mechanism is also provided on the driving column, and the speed control mechanism includes a No. 1 main gear symmetrically distributed along the length direction of the driving column, and the No. 1 main gear is connected to the driving column, and a No. 2 main gear identical to the No. 1 main gear is symmetrically and slidably provided in the width direction of the stretching platform, a buffer spring is connected between the No. 2 main gear and the side wall of the stretching platform, and a linkage belt is sleeved and connected between the No. 1 main gear and the No. 2 main gear on the same side of the stretching platform.

[0016] A gear set is symmetrically arranged at one end of the side wall of the stretching platform away from the No. 1 main gear, and a cross shaft is connected to the side of the gear set that is close to each other. A linkage column is slidably installed at one end of the cross shaft away from the gear set, and the linkage column is respectively connected to the stretching shafts on both sides of the stretching platform.

[0017] Preferably, the gear set includes a plurality of speed control gears with gradually increasing diameters extending outwardly along the length direction of the cross shaft, and execution circular plates alternately distributed with the speed control gears are provided between the plurality of speed control gears.

[0018] Preferably, a tensioning wheel is provided on the linkage belt, a tensioning spring is provided on the tensioning wheel, and the tensioning spring is installed on the side wall of the stretching platform.

[0019] Preferably, the stretching platform is also provided with an adjustment mechanism for adjusting the gear group for translation, the adjustment mechanism includes an L-shaped adjustment rod, one side of the L-shaped adjustment rod is slidably arranged on the stretching platform, and an adjustment groove for the L-shaped adjustment rod to slide is provided on the stretching platform, and the other side of the L-shaped adjustment rod is connected to the gear group; the stretching platform is also provided with scale markings.

[0020] Preferably, a linkage gear sleeve is slidably provided on the driving column of the stretching platform, and a limiting slide groove for sliding movement of the linkage gear sleeve is provided on the driving column, and a plug-in slide groove for plugging the linkage gear sleeve is provided on the stretching shaft.

[0021] Preferably, an annular groove is provided on one side of the linkage gear sleeve, a square block is slidably arranged in the annular groove, a linkage rod is installed on the square block, the end of the linkage rod away from the square block is a slope structure, and a reset spring is connected between the linkage rod and the stretching platform.

[0022] A T-shaped rod is provided on one side of the stretching platform along the height direction, and the T-shaped rod and the inclined surface of the linkage rod are in conflict with each other.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The present invention can effectively improve the stability of aluminum wire clamping through the limiter, which can not only ensure that the aluminum wire can effectively reduce its deformation damage rate during the clamping and fixing process, but also effectively ensure the performance of the aluminum wire during the tensile test, and avoid the situation that the aluminum wire always breaks in the clamping area during the tensile test, which affects the accuracy of the aluminum wire tensile test.

[0025] 2. The tensile detector of the present invention can effectively ensure the diversity of the tensile test of aluminum wire when performing tensile test on aluminum wire. It can not only realize the ultimate tensile test of the tensile test of aluminum wire, but also can perform tensile test on aluminum wire at different speeds.

[0026] 3. The present invention is provided with three groups of stretching detectors, which can perform a control group test on the stretching of the aluminum wire. The control group can effectively reduce the accuracy of the aluminum wire test results and avoid the occurrence of randomness in the aluminum wire stretching test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0029] Figure 2 It is a schematic structural diagram of the aluminum wire substrate layer and the protective layer of the present invention.

[0030] Figure 3 It is a schematic structural diagram of the limiting member of the present invention from a first viewing angle.

[0031] Figure 4 It is a schematic structural diagram of the limiting member of the present invention from a second viewing angle.

[0032] Figure 5 It is a schematic diagram of the structure of the stretching detector of the present invention from a first viewing angle.

[0033] Figure 6 It is a schematic diagram of the structure of the stretching detector of the present invention from a second viewing angle.

[0034] Figure 7 It is a schematic structural diagram of the stretching detector of the present invention from a third viewing angle.

[0035] Figure 8 It is a schematic structural diagram of the speed control mechanism of the present invention from a first viewing angle.

[0036] Fig. 9 It is a schematic structural diagram of the speed control mechanism of the present invention from a second viewing angle.

[0037] Fig.10 It is a schematic structural diagram of the speed control mechanism of the present invention from a third viewing angle.

[0038] Fig.11 It is a schematic diagram of the structure of the gear set of the present invention.

[0039] Fig.12 It is a structural schematic diagram of the regulating mechanism of the present invention.

[0040] Fig.13 It is a schematic diagram of the structure among the linkage gear sleeve, the limiting slide groove, the linkage rod, the reset tension spring and the T-shaped rod of the present invention.

[0041] Fig.14 It is a schematic diagram of the structure among the linkage gear sleeve, the limiting sliding groove, the annular groove, the square block and the linkage rod of the present invention.

[0042] Description of reference numerals: 1, aluminum wire; 10, base material layer; 11, protective layer; 2, stretching platform; 3, limiter; 4, stretching detector; 30, clamping plate; 31, moving plate; 32, winding roller; 33, limiter; 34, connecting rod; 35, connecting block; 36, locking screw; 40, rotating part; 400, stretching shaft; 41, stretching belt; 42, synchronization block; 43, strip stretching groove; 44, driving column; 45, driving motor; 5, speed control mechanism; 50, No. 1 main gear; 51. Main gear No. 2; 52. Buffer spring; 53. Linkage belt; 54. Gear set; 55. Cross shaft; 56. Linkage column; 540. Speed ​​control gear; 541. Executive circular plate; 530. Tensioning wheel; 531. Tensioning spring; 6. Adjustment mechanism; 60. L-shaped adjustment rod; 61. Scale mark; 70. Linkage gear sleeve; 71. Limiting slide groove; 72. Plug-in slide groove; 73. Annular groove; 74. Square block; 75. Linkage rod; 76. Reset spring; 77. T-shaped rod. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-Figure 14 This application is described in further detail.

[0044] The embodiment of the present application discloses a tensile testing device for an aluminum wire for use in corrosion-resistant IGBTs. It should be noted that the aluminum wire 1 for use in corrosion-resistant IGBTs is mainly used in the process of stretching the aluminum wire 1 .

[0045] When the aluminum wire 1 is stretched, the clamping stability of the existing stretching tooling is poor. The aluminum wire 1 is easily deformed during the clamping process, resulting in the tensile performance of the clamped area of ​​the aluminum wire 1 being significantly weaker than that of other areas of the aluminum wire 1. Furthermore, during the tensile test of the aluminum wire 1, the accuracy of the test results is affected.

[0046] Secondly, in the prior art, when the aluminum wire 1 is subjected to a tensile test, the ultimate tensile strength of the aluminum wire 1 is usually tested, and the tensile test has a certain singleness, and there is a lack of a control group when the aluminum wire 1 is subjected to a tensile test, which easily leads to a certain randomness in the test result.

[0047] Embodiment 1:

[0048] See also Figure 2 As shown, the present application relates to an anti-corrosion aluminum wire for IGBT, the chemical composition of the aluminum wire 1 is: by weight percentage, aluminum: 91.669%, silicon: 0.1%, iron: 0.211%, manganese: 2.46%, magnesium: 5.1% and cobalt: 0.46%;

[0049] The aluminum wire 1 is provided with a base material layer 10 and a protective layer 11 in sequence from the inside to the outside.

[0050] The aluminum wire 1 is mainly composed of aluminum, silicon, iron, manganese, magnesium and cobalt. The magnesium element can significantly improve the strength of the aluminum wire 1, especially under high temperature conditions. The increase in magnesium content will lead to an increase in the strength of the aluminum wire 1. The magnesium element can promote the grain refinement of the aluminum alloy in the aluminum wire 1, thereby increasing the strength and hardness of the material; it can improve the corrosion resistance and welding performance of the aluminum alloy.

[0051] The role of different manganese is to supplement the strengthening; manganese can supplement the strengthening effect of magnesium, reduce the magnesium content and reduce the tendency of hot cracking. Manganese can make Mg5Al8 compounds precipitate evenly, further improving the corrosion resistance and welding performance of aluminum alloys; the addition of manganese can significantly increase the yield strength and ultimate tensile strength of aluminum alloys without reducing ductility.

[0052] Thereby greatly improving its corrosion resistance.

[0053] Embodiment 2:

[0054] On the basis of the first embodiment, the present application further proposes a tensile test device for an aluminum wire for corrosion-resistant IGBT for performing a tensile test on the aluminum wire 1 in the first embodiment, as shown below:

[0055] Reference Figure 1 As shown, the tensile test device for the corrosion-resistant IGBT aluminum wire 1 includes a stationary tensile platform 2, the surface of the tensile platform 2 is provided with a limit member 3 for clamping and limiting the protective layer 11 of the aluminum wire 1, and the interior of the tensile platform 2 is provided with a tensile detector 4 for controlling the aluminum wire 1 on the limit member 3 to perform a tensile test.

[0056] It should be noted that the stopper 3 is mainly used to clamp the aluminum wire 1, so that the aluminum wire 1 can be stably and quickly clamped on the stretching platform 2 through the stopper 3; and the stretching detector 4 performs a stretching test on the aluminum wire 1 clamped by the stopper 3, which can perform two different stretching methods. First, the ultimate tensile strength of the aluminum wire 1 is tested at the same speed. Second, the stretching degree of the aluminum wire 1 is tested at different speeds.

[0057] The present invention can effectively improve the stability of clamping the aluminum wire 1 through the limiter 3, which can not only ensure that the aluminum wire 1 is effectively reduced in the process of clamping and fixing, but also effectively ensure the performance of the aluminum wire 1 during the tensile test, and avoid the situation that the aluminum wire 1 always breaks in the clamping area during the tensile test, which affects the accuracy of the tensile test of the aluminum wire 1.

[0058] When performing a tensile test on the aluminum wire 1, firstly, aluminum wires 1 at different positions are cut from the aluminum wires 1 of the same batch produced in advance, and then a tensile test is performed on them, as shown below.

[0059] Reference Figure 3 and Figure 4 As shown, it is a schematic diagram of the structure of the limit member 3 for clamping and limiting the aluminum wire 1 in the present application. Specifically, the limit member 3 includes a clamping plate 30 and three movable plates 31 arranged along the length direction of the stretching platform 2. The three movable plates 31 are evenly spaced along the length direction of the stretching platform 2. Winding rollers 32 are evenly spaced installed on the clamping plate 30, and winding rollers 32 are also respectively arranged on the three movable plates 31. The winding rollers 32 on the clamping plate 30 correspond one by one to the winding rollers 32 on the three groups of movable plates 31.

[0060] Limiting clamps 33 are symmetrically provided on both sides of the winding roller 32, and connecting rods 34 are hingedly installed at the bottom of the two limiting clamps 33. The end of the connecting rod 34 away from the limiting clamp 33 is provided on the connecting block 35, and the connecting block 35 is slidably provided on the clamping plate 30 and the movable plate 31. The clamping plate 30 and the movable plate 31 are rotatably provided with locking screws 36 corresponding to the position of the connecting block 35, and the connecting block 35 and the locking screw 36 are screwed together.

[0061] It should be noted that the clamping plate 30 is clamped on one side of the stretching platform 2, and the three movable plates 31 are slidably set on the stretching platform 2, and the three movable plates 31 are horizontally distributed. Secondly, a rubber block with an uneven surface is set at the position where the limit clamp 33 contacts the aluminum wire 1.

[0062] During the specific implementation process, first, one end of the intercepted aluminum wire 1 is wound around the winding roller 32 located in the middle of the clamping plate 30 by a winding technique, and then the locking screw 36 is rotated. At this time, the locking screw 36 drives the movable plate 31 to move away from the winding roller 32, and then the connecting rod 34 on the movable plate 31 controls the two limit clamps 33 to move in the direction of the winding roller 32 until the rubber block on the limit clamp 33 contacts the winding roller 32 and the aluminum wire 1 wound around the winding roller 32. At this time, the clamping of one end of the aluminum wire 1 is completed, and the other end of the aluminum wire 1 is clamped on the winding roller 32 of the movable plate 31 on the same horizontal line as the clamping plate 30 using the same steps as above, that is, the clamping of the aluminum wire 1 is completed.

[0063] The aluminum wire 1 is clamped by winding, which not only prevents the aluminum wire 1 from being deformed, but also as the number of winding turns increases, the pulling force is greater due to friction, thereby preventing the aluminum wire 1 from slipping during the stretching process. In addition, under the clamping of the limit clamp 33, the aluminum wire 1 is squeezed by the rubber block, which can ensure the stability of the aluminum wire 1 to the greatest extent.

[0064] When the aluminum wire 1 is clamped and the entire device is checked to ensure that it can operate completely, the fixed aluminum wire 1 can be subjected to a tensile test.

[0065] See also Figure 5 , Figure 6 and Figure 7 As shown, the stretching detector 4 includes three groups of rotating parts 40 corresponding to the winding rollers 32 arranged at the bottom of the stretching platform 2, each group of rotating parts 40 includes two symmetrically distributed stretching shafts 400, and the two stretching shafts 400 are sleeved with stretching belts 41. The stretching belts 41 are connected to the movable plate 31 one by one through synchronization blocks 42, and a strip stretching groove 43 is opened on the stretching platform 2 for the synchronization blocks 42 to move.

[0066] A driving column 44 is rotatably provided on one side of the stretching platform 2, and a driving motor 45 is connected to one side of the driving column 44. The driving motor 45 is arranged on one side of the stretching platform 2 through a motor seat, and the driving column 44 rotatably passes through two stretching shafts 400 on the same side and is connected to the driving column 44 in the middle of the stretching platform 2.

[0067] It should be noted that, the stretching platform 2 in the present application is provided with three groups of rotating parts 40 and stretching belts 41 corresponding to the rotating parts 40, and the three groups of rotating parts 40 correspond to the winding rollers 32 on the stretching platform 2. Therefore, the present application can perform stretching tests on three groups of aluminum wires 1 at the same time, which can serve as a reference to ensure the accuracy of the stretching test of the aluminum wire 1 and avoid contingency.

[0068] However, it should be noted that the present application is not limited to performing tensile tests on three groups of aluminum wires 1, but can perform tensile tests on multiple groups of different aluminum wires 1, and the tensile conditions of the aluminum wires 1 can be monitored at different speeds when the aluminum wires 1 are stretched.

[0069] During the specific implementation process, the drive motor 45 is started, and the drive motor 45 drives the stretching shaft 400 to rotate through the drive column 44, and then the stretching belt 41 starts to rotate clockwise, and the synchronization block 42 on the stretching belt 41 drives the movable plate 31 on the stretching platform 2 with the aluminum wire 1 wrapped thereon to move along the strip stretching groove 43 of the stretching platform 2 in a direction away from the clamping plate 30, until the aluminum wire 1 gradually straightens after being loosened, and the straightened aluminum wire is gradually stretched and breaks at its limit state, and the stretching state of the aluminum wire in the whole process is recorded.

[0070] See also Figure 8 , Fig. 9 and Fig.10 As shown, it is a structural schematic diagram of the speed control mechanism 5 in the present application, which enables the performance of the aluminum wire 1 to be tested at different stretching speeds.

[0071] A speed control mechanism 5 is also provided on the driving column 44, and the speed control mechanism 5 includes a No. 1 main gear 50 symmetrically distributed along the length direction of the driving column 44, and the No. 1 main gear 50 is connected to the driving column 44, and a No. 2 main gear 51 identical to the No. 1 main gear 50 is symmetrically and slidably provided in the width direction of the stretching platform 2, a buffer spring 52 is connected between the No. 2 main gear 51 and the side wall of the stretching platform 2, and a linkage belt 53 is sleeved and connected between the No. 1 main gear 50 and the No. 2 main gear 51 on the same side of the stretching platform 2.

[0072] A gear set 54 is symmetrically arranged at one end of the side wall of the stretching platform 2 away from the No. 1 main gear 50, and a cross shaft 55 is connected to the side where the gear sets 54 are close to each other. A linkage column 56 is slidably installed at one end of the cross shaft 55 away from the gear set 54, and the linkage columns 56 are respectively connected to the stretching shafts 400 on the stretching platform 2.

[0073] It should be noted that the driving motor 45 mainly drives the first main gear 50 to rotate, and the first main gear 50 controls the second main gear 51 to rotate synchronously through the linkage belt 53, so that the rotation speeds of the two are always the same.

[0074] The function of the linkage column 56 and the cross shaft 55 is to ensure that the gear set 54 can still control the corresponding stretching shaft 400 to rotate after the position is adjusted.

[0075] See also Fig.12 As shown, the stretching platform 2 is also provided with an adjusting mechanism 6 for adjusting the gear set 54 to move and realize speed regulation. The adjusting mechanism 6 includes an L-shaped adjusting rod 60. One side of the L-shaped adjusting rod 60 is slidably set on the stretching platform 2, and an adjusting groove for the L-shaped adjusting rod 60 to slide is opened on the stretching platform 2. The other side of the L-shaped adjusting rod 60 is connected to the gear set 54.

[0076] The stretching platform 2 is also provided with scale marks 61 .

[0077] The scale mark 61 corresponds to each speed control gear 540 on the gear set 54. When the moving plate 31 needs to move at a specified speed, the scale mark 61 can be used to control the moving distance of the L-shaped adjustment rod 60 to ensure that after the L-shaped adjustment rod 60 moves to the specified position of the scale mark 61, the specified speed control gear 540 is meshed with the second main gear 51.

[0078] The L-shaped adjusting rod 60 can control the speed control gears 540 of different diameters on the gear set 54 to mesh with the second main gear 51 , and the L-shaped adjusting rod 60 will not affect the rotation of the gear set 54 .

[0079] After the three groups of aluminum wires 1 are installed on the winding roller 32, when the three groups of aluminum wires 1 need to be subjected to tensile tests at three different speeds, the L-shaped adjustment rod 60 on one side is moved to control the corresponding gear set 54 to move through the L-shaped adjustment rod 60, so that the speed control gear 540 in the corresponding gear set 54 is engaged with the second main gear 51.

[0080] It should be noted that the stretching belt 41 in the middle of the stretching platform 2 rotates at a constant speed, and its rotation speed is the reference speed, while the stretching belt 41 on one side of the stretching platform 2 rotates at a uniform speed under the adjustment of the speed control mechanism 5. Then the drive motor 45 is started, and the three groups of movable plates 31 on the stretching platform 2 move outward at different speeds until the aluminum wire 1 is stretched to a breaking state. At this time, the state of the aluminum wire 1 of the three groups of movable plates 31 during the entire stretching process is recorded, thereby recording the stretching properties of the aluminum wire 1 at different speeds.

[0081] The tensile detector 4 of the present invention can effectively ensure the diversity of the tensile test of the aluminum wire 1 when performing a tensile test on the aluminum wire 1. It can not only realize the ultimate tensile test of the tensile test of the aluminum wire 1, but also perform tensile tests on the aluminum wire 1 at different speeds.

[0082] The present invention is provided with three groups of stretching detectors 4, which can perform a control group test on the stretching of the aluminum wire 1. The control group can effectively reduce the accuracy of the test result of the aluminum wire 1, and avoid the occurrence of randomness in the tensile test result of the aluminum wire 1.

[0083] See also Fig.11 As shown, the gear set 54 includes a plurality of speed control gears 540 with gradually increasing diameters extending outward along the length direction of the cross shaft 55 , and execution circular plates 541 alternately distributed with the speed control gears 540 are arranged between the plurality of speed control gears 540 .

[0084] The function of the gear set 54 is described above. The gear set 54 is mainly composed of several groups of speed control gears 540. The diameter of the speed control gears 540 gradually decreases from the inside to the outside. When it is necessary to adjust the stretching speed of the movable plate 31 on one side of the stretching platform 2, pushing and pulling the L-shaped adjustment rod 60 can control the several groups of speed control gears 540 to mesh with the second main gear 51.

[0085] When the speed control gear 540, which has a smaller diameter than the second main gear 51, is meshed with the second main gear 51, the moving plate 31 corresponding to the speed control gear 540 will move faster; when the speed control gear 540, which has a larger diameter than the second main gear 51, is meshed with the second main gear 51, the moving plate 31 corresponding to the speed control gear 540 will move slower.

[0086] Replay Fig. 9 and Fig.10 As shown, a tensioning wheel 530 is provided on the linkage belt 53 , and a tensioning spring 531 is provided on the tensioning wheel 530 . The tensioning spring 531 is installed on the side wall of the stretching platform 2 .

[0087] When the gear set 54 adjusts the position of the speed control gear 540, the position of the second main gear 51 needs to be fine-tuned to ensure that the second main gear 51 can mesh with the speed control gear 540 of different diameters. Therefore, a tensioning wheel 530 and a tensioning spring 531 are provided on the linkage belt 53 between the second main gear 51 and the first main gear 50 to ensure that the linkage belt 53 always controls the meshing of the second main gear 51 and the first main gear 50, and the two always maintain a synchronous rotation speed.

[0088] Embodiment three:

[0089] Reference Fig.13 and Fig.14 As shown, on the basis of Example 2, in order to further ensure the diversity of the tensile test of the aluminum wire 1, the present application also proposes a linkage gear sleeve 70 for controlling the three groups of moving plates 31 to move at the same speed; in the above, the speed control gear 540 of different diameters on the gear set 54 can be adjusted to mesh with the second main gear 51 to control the moving speed of the moving plate 31, but in order to move the three moving plates 31 synchronously, it is necessary to ensure that the speed control gear 540 with the same diameter as the second main gear 51 in the gear set 54 is meshed with the second main gear 51, and the present application designs a portable operation procedure, which can make the three groups of moving plates 31 quickly realize synchronous movement without adjusting the gear set 54, so as to control the synchronous movement of the three moving plates 31 to form a control group, and thus proposes a linkage gear sleeve 70 to achieve the above-mentioned problem, as shown below.

[0090] Specifically, a linkage gear sleeve 70 is slidably provided on the driving column 44 of the stretching platform 2, and a limiting slide groove 71 for the linkage gear sleeve 70 to slide is provided on the driving column 44, and a plug-in slide groove 72 for the linkage gear sleeve 70 to be plugged in is provided on the stretching shaft 400.

[0091] An annular groove 73 is provided on one side of the linkage gear sleeve 70, and a square block 74 is slidably arranged in the annular groove 73. A linkage rod 75 is installed on the square block 74. The end of the linkage rod 75 away from the square block 74 is a slope structure. A reset spring 76 is connected between the linkage rod 75 and the stretching platform 2.

[0092] A T-shaped rod 77 is provided on one side of the stretching platform 2 along the height direction, and the T-shaped rod 77 and the inclined surface of the linkage rod 75 are in conflict with each other.

[0093] During the specific implementation process, when the three groups of movable plates 31 need to maintain a synchronous moving speed, the T-shaped rod 77 is pressed downward. At this time, the T-shaped rod 77 presses down the linkage rod 75. After being squeezed by the external force, the inclined surface of the linkage rod 75 controls the linkage gear sleeve 70 to move into the plug-in slot 72 of the stretching shaft 400. At this time, the plug-in slot 72 connects the stretching shaft 400 with the driving column 44. When the driving column 44 rotates, the three stretching shafts 400 at its upper end can be controlled to rotate synchronously, and then the corresponding stretching belt 41 controls the three movable plates 31 to move synchronously through the synchronization block 42. As the movable plate 31 moves, the aluminum wire 1 wrapped around its upper end is controlled to perform a tensile test.

[0094] During operation: In the first step, when performing a tensile test on the aluminum wire 1, the aluminum wire 1 at different positions is firstly cut from the aluminum wire 1 in the same batch produced in advance.

[0095] Step 2: Wrap one end of the cut aluminum wire 1 around the winding roller 32 on the clamping plate 30 by winding technique, then rotate the locking screw 36 to control the two limit clamps 33 to move toward the winding roller 32 until the rubber block on the limit clamp 33 contacts the winding roller 32 and the aluminum wire 1 wound around the winding roller 32. At this time, the clamping of one end of the aluminum wire 1 is completed, and the other end of the aluminum wire 1 is clamped on the winding roller 32 of the moving plate 31 on the same horizontal line as the clamping plate 30 using the same steps as above.

[0096] Step 3: When the aluminum wire 1 is clamped, start the drive motor 45. The drive motor 45 drives the stretching shaft 400 to rotate through the drive column 44. Then the stretching belt 41 starts to rotate clockwise. The synchronization block 42 on the stretching belt 41 drives the moving plate 31 on the stretching platform 2 to move along the strip stretching groove 43 of the stretching platform 2 away from the clamping plate 30 until the aluminum wire 1 wrapped on the moving plate 31 gradually straightens after being relaxed. The straightened aluminum wire is gradually stretched until it breaks when stretched to the limit state, and the overall state of the aluminum wire in the whole process is recorded.

[0097] Step 4: The aluminum wire 1 can also be subjected to a tensile test at different speeds. When it is necessary to adjust the tensile speed of the movable plate 31 on one side of the tensile platform 2, the L-shaped adjusting rod 60 is pushed and pulled, and several groups of speed control gears 540 can be controlled to mesh with the second main gear 51 according to the scale mark 61 on the tensile platform 2; when the speed control gear 540 with a smaller diameter than the second main gear 51 meshes with the second main gear 51, the moving plate 31 corresponding to the speed control gear 540 will move faster; when the speed control gear 540 with a larger diameter than the second main gear 51 meshes with the second main gear 51, the moving plate 31 corresponding to the speed control gear 540 will move slower.

[0098] Step 5: When the three groups of moving plates 31 need to maintain a synchronous moving speed, press the T-shaped rod 77 downward to control the linkage gear sleeve 70 to move into the plug-in slot 72 of the stretching shaft 400 at the bottom of the stretching platform 2 until the two plug-in slots 72 are inserted into the stretching shaft 400. At this time, when the driving column 44 rotates, the three stretching shafts 400 at its upper end can be controlled to rotate synchronously, and then the stretching shaft 400 controls the aluminum wire 1 wrapped around the upper end of the moving plate 31 to perform a stretching test.

[0099] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A corrosion-resistant IGBT aluminum wire tensile test device, comprising an aluminum wire (1), wherein the aluminum wire (1) is provided with a base material layer (10) and a protective layer (11) in sequence from the inside to the outside, characterized in that: The corrosion-resistant IGBT aluminum wire tensile test device comprises a stationary tensile platform (2), a surface of the tensile platform (2) is provided with a limiter (3) for clamping and limiting the protective layer (11) of the aluminum wire (1), and the interior of the tensile platform (2) is provided with a tensile detector (4) for controlling the limiter (3) to stretch the aluminum wire (1) substrate layer (10); The stretching detector (4) comprises three groups of rotating parts (40) corresponding to the winding rollers (32) arranged at the bottom of the stretching platform (2), each group of rotating parts (40) comprises two symmetrically distributed stretching shafts (400), the two stretching shafts (400) are sleeved with stretching belts (41), the three stretching belts (41) on the stretching platform (2) and the three moving plates (31) are connected one by one via synchronization blocks (42), and the stretching platform (2) is provided with a strip-shaped stretching groove (43) for the synchronization blocks (42) to move; a driving column (44) is rotatably provided on one side of the stretching platform (2), a driving motor (45) is connected to one side of the driving column (44), the driving motor (45) is arranged on one side of the stretching platform (2) via a motor seat, and the driving column (44) rotatably passes through the two stretching shafts (400) on the same side and is connected to the driving column (44) in the middle of the stretching platform (2); The driving column (44) is also provided with a speed control mechanism (5), the speed control mechanism (5) comprising a first main gear (50) symmetrically distributed along the length direction of the driving column (44), and the first main gear (50) is connected to the driving column (44), and a second main gear (51) identical to the first main gear (50) is symmetrically slidably provided in the width direction of the stretching platform (2), and a buffer spring (52) is connected between the second main gear (51) and the side wall of the stretching platform (2), and the stretching platform (2) is on the same side. A linkage belt (53) is sleeved and connected between the first main gear (50) and the second main gear (51); a gear set (54) is symmetrically arranged at one end of the side wall of the stretching platform (2) away from the first main gear (50); a cross shaft (55) is connected to the sides of the gear sets (54) close to each other; a linkage column (56) is slidably mounted at one end of the cross shaft (55) away from the gear set (54); and the linkage column (56) is respectively connected to the stretching shafts (400) on both sides of the stretching platform (2).

2. The corrosion-resistant IGBT aluminum wire tensile test device according to claim 1, characterized in that: The limiting member (3) comprises a clamping plate (30) and three movable plates (31) arranged along the length direction of the stretching platform (2); the three movable plates (31) are evenly spaced along the length direction of the stretching platform (2); winding rollers (32) for winding the aluminum wire (1) are evenly spacedly installed on the clamping plate (30); the three movable plates (31) are also respectively provided with winding rollers (32) for winding the aluminum wire (1); and the winding rollers (32) on the clamping plate (30) correspond one to one with the winding rollers (32) on the three groups of movable plates (31); Limiting clamps (33) for clamping the protective layer (11) of the aluminum wire (1) are symmetrically arranged on both sides of the winding roller (32); a connecting rod (34) is hinged at the bottom of the two limiting clamps (33); one end of the connecting rod (34) away from the limiting clamps (33) is arranged on a connecting block (35); the connecting block (35) is slidably arranged in the clamping plate (30) and the movable plate (31); the clamping plate (30) and the movable plate (31) are rotatably provided with locking screws (36) corresponding to the position of the connecting block (35); the connecting block (35) and the locking screw (36) are screwed together.

3. The corrosion-resistant IGBT aluminum wire tensile test device according to claim 1, characterized in that: The gear set (54) comprises a plurality of speed control gears (540) with gradually increasing diameters extending outwardly along the length direction of the cross shaft (55), and execution circular plates (541) arranged alternately with the speed control gears (540) are provided between the plurality of speed control gears (540).

4. The corrosion-resistant IGBT aluminum wire tensile test device according to claim 1, characterized in that: The linkage belt (53) is provided with a tensioning wheel (530), the tensioning wheel (530) is provided with a tensioning spring (531), and the tensioning spring (531) is installed on the side wall of the stretching platform (2).

5. The corrosion-resistant IGBT aluminum wire tensile test device according to claim 1, characterized in that: The stretching platform (2) is also provided with an adjustment mechanism (6) for adjusting the gear set (54) to translate, the adjustment mechanism (6) comprising an L-shaped adjustment rod (60), one side of the L-shaped adjustment rod (60) being slidably disposed on the stretching platform (2), and an adjustment groove for the L-shaped adjustment rod (60) to slide is provided on the stretching platform (2), and the other side of the L-shaped adjustment rod (60) is connected to the gear set (54); the stretching platform (2) is also provided with a scale mark (61).

6. The corrosion-resistant IGBT aluminum wire tensile test device according to claim 1, characterized in that: A linkage gear sleeve (70) is slidably provided on the driving column (44) of the stretching platform (2), and a limiting sliding groove (71) for the linkage gear sleeve (70) to slide is provided on the driving column (44), and a plug-in sliding groove (72) for the linkage gear sleeve (70) to be plugged in is provided on the stretching shaft (400).

7. The corrosion-resistant IGBT aluminum wire tensile test device according to claim 6, characterized in that: An annular groove (73) is provided on one side of the linkage gear sleeve (70), a square block (74) is slidably arranged in the annular groove (73), a linkage rod (75) is mounted on the square block (74), one end of the linkage rod (75) away from the square block (74) is an inclined surface structure, and a reset tension spring (76) is connected between the linkage rod (75) and the stretching platform (2); a T-shaped rod (77) is penetrated along the height direction of one side of the stretching platform (2), and the inclined surfaces of the T-shaped rod (77) and the linkage rod (75) are in conflict with each other.

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