Fatigue test device capable of loading electricity-heat-force coupling field load
By designing a fatigue testing device capable of loading electro-thermal-mechanical coupled field loads, the problem that existing devices are unable to simulate the actual service environment of solder joints in brazing is solved, and more efficient testing results are achieved.
Patent Information
- Application Number
- CN202520332208.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-02-27
AI Technical Summary
Existing fatigue testing equipment cannot easily simulate the actual service environment of brazing filler metal and its interconnecting solder joints under electro-thermal-mechanical coupled loads, resulting in biased life predictions and high costs.
A fatigue testing device capable of loading electro-thermal-mechanical coupled field loads was designed, including a temperature control chamber, fixtures, an electric load source, a mechanical load source, and a monitoring component. It can cyclically load the specimen under electro-thermal-mechanical coupled loads and monitor displacement data in real time.
It more realistically simulates the actual service environment of the solder and its interconnection joints, reducing test time costs and improving test efficiency.
Smart Images
Figure CN223664390U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to material mechanics performance testing device technical field, concretely relates to a kind of fatigue test device of electric-thermal-force coupling field load. BACKGROUND
[0002] In the use process of electronic product, temperature cycle, vibration cycle and impact load are mostly inevitable, and the damage caused by them to electronic product is also irreversible. As the interconnection material inside electronic product, the solder is also subjected to these loads for a long time, which is easy to produce cracks in the solder body and cause fracture, thereby leading to interconnection failure and electronic product unable to use normally. When designing electronic product, engineers will ensure that the mechanical properties of each component meet the requirements, but the life prediction of the interconnection part of electronic product (i.e. solder interconnection joint) is mostly based on the condition without current loading, which has not small difference with the real situation (i.e. the interconnection part of electronic product is mostly served under power on). This difference will inevitably cause not small deviation in life prediction. At the same time, the solder interconnection joint is the weakest part in the whole electronic product. Therefore, the fatigue performance of solder and its interconnection joint under coupled load is still one of the key points and difficulties of in-depth research.
[0003] At present, there are various types of fatigue testers on the market, which can basically complete fatigue tests of different mechanical loads. On this basis, there are fatigue testers that can realize thermal-mechanical coupled load, and more advanced ones have a scanning electron microscope for thermal-mechanical coupled field action fatigue tester. In addition, DMA can also realize fatigue loading of electric-thermal-mechanical coupled load on solder and its interconnection joint by externally building a platform. The maximum mechanical load that DMA can load is 500N, and the temperature range is -150~600℃. DMA is mainly used to test the dynamic mechanical properties of viscoelastic materials under different frequencies, different temperatures and different loads. By changing the force, temperature and other parameters, the mechanical properties of the material are reflected, and the force, temperature and other parameters are applied to the sample for a long time, which can also achieve the effect of fatigue treatment of the sample. However, using DMA for fatigue test of materials has the problems of small load, long test time, high test cost and inevitable consumption of wear parts due to long-term uninterrupted use.
[0004] Although the existing technology is extensive, it still cannot simply simulate the actual service environment of solder and its interconnection joint—electric-thermal-mechanical coupled load. Therefore, in order to improve the fatigue test efficiency of solder and its interconnection joint, and to more conveniently simulate the actual service environment of solder and its interconnection joint, a fatigue test device capable of loading electric-thermal-mechanical coupled field load is proposed. SUMMARY
[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a fatigue testing device capable of loading electro-thermal-mechanical coupled field loads, so as to more realistically simulate the actual service environment of brazing filler metal and its interconnecting solder joints, reduce testing time costs, and improve testing efficiency.
[0006] To achieve the above objectives, this utility model provides a fatigue testing device capable of loading an electro-thermal-mechanical coupled field load, comprising: a frame; a temperature control chamber mounted on the frame, the temperature of which can be adjusted; a clamp mounted inside the temperature control chamber for fixing the specimen; an electrical load source for applying an electrical load to the specimen inside the temperature control chamber; a force load source for applying a force load to the specimen inside the temperature control chamber; and a monitoring component mounted on the frame for monitoring and collecting displacement data of the specimen inside the temperature control chamber.
[0007] Preferably, the force load source includes a modal exciter, which is located below the temperature control box.
[0008] Preferably, the clamp includes a first clamping assembly and two second clamping assemblies, the first clamping assembly being movably disposed between the two second clamping assemblies; the first clamping assembly includes a first clamping block and a second clamping block, the second clamping block being disposed above the first clamping block, the first clamping block being provided with a connecting rod, the connecting rod extending out of the temperature control box and being connected to the modal exciter.
[0009] Preferably, the modal exciter is separately disposed from the frame.
[0010] Preferably, the second clamping assembly includes a third clamping block and a fourth clamping block, the third clamping block being disposed on the frame and the fourth clamping block being disposed above the third clamping block.
[0011] Preferably, the temperature control box is provided with a heat insulation layer and a temperature control plate.
[0012] Preferably, the temperature control box includes an upper box and a lower box that can be snapped together, and the lower box is mounted on the frame.
[0013] Preferably, the monitoring component includes a laser displacement sensor and a mounting block, the laser displacement sensor being mounted on the mounting block, and the mounting block being mounted on the frame; the temperature control box is provided with a monitoring hole through which the laser displacement sensor beam can pass.
[0014] Preferably, the frame is provided with a first support plate and a second support plate, the second support plate is located above the first support plate, the temperature control box is located on the first support plate, and the mounting block is located on the second support plate.
[0015] Preferably, the electrical load source includes a power source and two electrical clamps, the power source being connected to the two electrical clamps, and the electrical clamps being used to hold the sample inside the temperature control chamber.
[0016] The beneficial effects of this utility model are:
[0017] This invention discloses a fatigue testing device capable of applying electro-thermal-mechanical coupled loads. By designing the fixture within a temperature-controlled chamber, and with the cooperation of an electrical load source and a mechanical load source, it can cyclically apply electro-thermal-mechanical coupled loads to the specimen. Simultaneously, monitoring components enable real-time monitoring and acquisition of specimen displacement data, thus achieving the acquisition of specimen deformation data during the electro-thermal-mechanical coupled load cycle. By processing and quantitatively analyzing the acquired data, the structural fatigue performance of the specimen under electro-thermal-mechanical coupled load cyclic loading can be evaluated. Compared to conventional fatigue testing instruments with single loads or binary coupled loads, this fatigue testing device can more realistically simulate the actual service environment of brazing filler metal and its interconnecting solder joints, reducing testing time costs and improving testing efficiency. Attached Figure Description
[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0019] Figure 1 A schematic diagram of the structure of a fatigue testing device capable of loading electro-thermal-mechanical coupled field loads according to an embodiment of the present invention;
[0020] Figure 2 This is a schematic diagram of the structure after the rack is hidden;
[0021] Figure 3 for Figure 2 Front view in the current state;
[0022] Figure 4 This is a schematic diagram of the frame structure;
[0023] Figure 5 This is a schematic diagram of the temperature control box mounted on the first support plate.
[0024] Figure 6 This is a schematic diagram of the internal structure of the temperature control box;
[0025] Figure 7 This is a schematic diagram of the fixture's structure;
[0026] Figure 8This is a schematic diagram of the second clamping component;
[0027] Figure 9 This is a schematic diagram of the structure of the first clamping component;
[0028] Figure 10 A schematic diagram of a laser displacement sensor fixed on a mounting block;
[0029] Figure label:
[0030] 10. Frame; 11. Base; 111. Clearance hole; 12. First support plate; 13. Second support plate; 14. Second support column; 15. Third support column; 20. Temperature control box; 21. Insulation layer; 22. Temperature control plate; 23. Upper box; 24. Lower box; 25. Monitoring hole; 31. First clamping block; 32. Second clamping block; 33. Connecting rod; 34. Third clamping block; 35. Fourth clamping block; 36. First support column; 40. Electrical load source; 41. Electrical clamp; 50. Modal exciter; 60. Monitoring component; 61. Laser displacement sensor; 62. Mounting block. Detailed Implementation
[0031] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.
[0032] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.
[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0034] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.
[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0037] like Figures 1-10 As shown, in one embodiment of this utility model, a fatigue testing device capable of loading electro-thermal-mechanical coupled field loads is provided, including a frame 10, a temperature control chamber 20, a clamp, an electrical load source 40, a force load source, and a monitoring component 60. The temperature control chamber 20 is mounted on the frame 10, and the temperature of its internal cavity can be adjusted. The clamp is installed inside the temperature control chamber 20 and is used to fix the specimen. The electrical load source 40 is used to apply an electrical load to the specimen inside the temperature control chamber 20, and the force load source is used to apply a force load to the specimen inside the temperature control chamber 20. The monitoring component 60 is mounted on the frame 10 and is used to monitor and collect displacement data of the specimen inside the temperature control chamber 20.
[0038] This embodiment discloses a fatigue testing apparatus capable of loading electro-thermal-mechanical coupled loads. By designing the fixture within a temperature-controlled chamber 20, and with the cooperation of an electrical load source 40 and a force load source, it can cyclically load the specimen with electro-thermal-mechanical coupled loads. Simultaneously, a monitoring component 60 can monitor and collect the specimen's displacement data in real time, thereby achieving the acquisition of specimen deformation data during the electro-thermal-mechanical coupled load cycle. By processing and quantitatively analyzing the collected data, the structural fatigue performance of the specimen under electro-thermal-mechanical coupled load cyclic loading can be evaluated. Compared to conventional fatigue testing instruments with single loads or binary coupled loads, this fatigue testing apparatus can more realistically simulate the actual service environment of the brazing filler metal and its interconnecting solder joints, reducing testing time costs and improving testing efficiency.
[0039] In one embodiment, the frame 10 includes a base 11, a first support plate 12 and a second support plate 13. The first support plate 12 is mounted above the base 11 by four first support columns 36, and the second support plate 13 is mounted above the first support plate 12 by multiple second support columns 14. The temperature control box 20 is mounted on the first support plate 12.
[0040] In one embodiment, the force load source includes a modal exciter 50, a signal generator, and a power amplifier (not shown in the figures). The modal exciter 50 is located below the temperature control chamber 20 and is connected to a fixture to apply a force load to the sample. The signal generator is connected to the power amplifier via wires, and the power amplifier is also connected to the modal exciter 50 via wires. The signal transmission direction is from the signal generator to the power amplifier, and then to the modal exciter 50. The modal exciter 50 converts the electrical signal into a mechanical signal and outputs a mechanical signal.
[0041] In one embodiment, the fixture includes a first clamping assembly and two second clamping assemblies, with the first clamping assembly movably disposed between the two second clamping assemblies. The first clamping assembly includes a first clamping block 31 and a second clamping block 32, with the second clamping block 32 positioned above the first clamping block 31. A connecting rod 33 is provided on the first clamping block 31, extending out of the temperature control chamber 20 and passing through the first support plate 12 before connecting to the modal exciter 50. Further, the second clamping assembly includes a third clamping block 34 and a fourth clamping block 35. The third clamping block 34 is fixed to the frame 10 by a third support column 15, and the fourth clamping block 35 is positioned above the third clamping block 34. The first clamping block 31 and the second clamping block 32, as well as the third clamping block 34 and the fourth clamping block 35, are all clamped to secure the sample by bolts and nuts.
[0042] Since the sample is held by two second clamping components, and the first clamping component is located between the two second clamping components, when the modal exciter 50 is working, it will drive the first clamping block 31 and the second clamping block 32 through the connecting rod 33 to move the sample, thereby realizing the loading of force load on the sample.
[0043] In one embodiment, the modal exciter 50 is separately disposed from the frame 10. Specifically, the base 11 is provided with a clearance hole 111, and the modal exciter 50 is installed in the clearance hole 111. This structural design can avoid the displacement of the modal exciter 50 during long-term fatigue loading, thereby eliminating the impact on the test accuracy.
[0044] In one embodiment, the temperature control chamber 20 is provided with a heat insulation layer 21 and a temperature control plate 22. Further, the temperature control chamber 20 includes an upper chamber 23 and a lower chamber 24 that can be snapped together. The lower chamber 24 is mounted on the first support plate 12. The temperature control chamber 20 can provide a relatively closed environment for the test. At the same time, the structural design of the temperature control chamber 20 also facilitates the placement and removal of samples.
[0045] In one embodiment, the monitoring component 60 includes a laser displacement sensor 61 and a mounting block 62. The laser displacement sensor 61 is mounted on the mounting block 62, which is fixed to the second support plate 13. The top of the upper housing 23 is provided with a monitoring hole 25 through which the laser beam of the laser displacement sensor 61 can pass.
[0046] In one embodiment, the electrical load source 40 includes a power source (not shown in the figures) and two electrical clamps 41. The power source is connected to the two electrical clamps 41, which are used to clamp the sample inside the temperature control chamber 20. The wires of the electrical clamps 41 extend outside the temperature control chamber 20.
[0047] In this embodiment, the fixture is made of high-strength insulating material. The DC current source can apply DC current within the range of 0–80A with a current loading accuracy of ±0.001A. The AC power source can apply AC current within the range of 0–20V with a current loading accuracy of ±0.1A. The temperature control box 20 can control a temperature range of -150–500℃ with a temperature control accuracy of ±0.1℃. The modal exciter 50 can apply a force within the range of 0–1000N with a force loading accuracy of ±0.01N and a maximum amplitude of 12.5mm. The signal generator outputs a frequency range of 0.01Hz–2MHz, and the waveform types include sine wave, square wave, triangle wave, and sawtooth wave. In this embodiment, a frequency of 1Hz and a square wave waveform are selected. The laser displacement sensor 61 has a measurement center distance of 85mm, a measurement range of ±20mm, a measurement accuracy of 2.5μm, and a sampling frequency of 5000Hz.
[0048] Before the test, the sample is first fixed in the fixture, and two electric clamps 41 are used to clamp both ends of the sample. The wires of the two electric clamps 41 are then connected to the positive and negative terminals of the power supply, respectively. Next, the slots of the upper housing 23 and the lower housing 24 are aligned to place the sample in a relatively sealed environment. Then, the position of the laser displacement sensor 61 is adjusted so that it is above the monitoring hole 25 of the upper housing 23 and can measure the protruding surface of the second clamping block 32, completing the initial setting of the laser displacement sensor 61.
[0049] During the experiment, the temperature control plate 22 is first set to the target temperature, then the signal generator is started, and the excitation signal is set. The excitation signal is input to the modal exciter 50 through the power amplifier. The modal exciter 50 outputs power to the connecting rod 33, which drives the first clamping block 31 and the second clamping block 32 to make the sample move in accordance with the excitation signal. The power is turned on at the same time as the modal exciter 50 starts working, so as to ensure that the sample is subjected to electro-mechanical coupling load at the same time.
[0050] The laser displacement sensor 61 measures the displacement of the sample by observing the displacement change of the protruding surface of the second clamp 32. The cable of the laser displacement sensor 61 is connected to a computer via an RS-485 cable. The computer displays and records the measured displacement signal using HL-G1SM1 software, which enables data acquisition, real-time data display, and acquisition rate setting. By analyzing the acquired data, the deformation of the sample during electro-mechanical coupled cyclic loading can be determined, thereby evaluating the structural fatigue behavior of the sample.
[0051] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.
[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.
Claims
1. A fatigue testing device capable of loading electro-thermal-mechanical coupled field loads, characterized in that, include: Rack (10); A temperature control box (20) is installed on the frame (10), and the temperature control box (20) can adjust the temperature of its internal cavity; A clamp is provided inside the temperature control box (20), and the clamp is used to fix the sample; An electric load source (40) is used to apply an electric load to the sample inside the temperature control chamber (20); A force load source for applying a force load to the sample inside the temperature control chamber (20); and A monitoring component (60) is mounted on the frame (10) and is used to monitor and collect displacement data of the sample inside the temperature control chamber (20).
2. The fatigue testing device capable of loading electro-thermal-mechanical coupled field loads according to claim 1, characterized in that, The force load source includes a modal exciter (50), which is located below the temperature control box (20).
3. The fatigue testing device capable of loading electro-thermal-mechanical coupled field loads according to claim 2, characterized in that, The clamp includes a first clamping component and two second clamping components, wherein the first clamping component is movably disposed between the two second clamping components; The first clamping assembly includes a first clamping block (31) and a second clamping block (32). The second clamping block (32) is located above the first clamping block (31). The first clamping block (31) is provided with a connecting rod (33), which extends out of the temperature control box (20) and is connected to the modal exciter (50).
4. The fatigue testing device capable of loading electro-thermal-mechanical coupled field loads according to claim 2, characterized in that, The modal exciter (50) is separately disposed from the frame (10).
5. The fatigue testing device capable of loading electro-thermal-mechanical coupled field loads according to claim 3, characterized in that, The second clamping assembly includes a third clamping block (34) and a fourth clamping block (35), the third clamping block (34) being disposed on the frame (10) and the fourth clamping block (35) being disposed above the third clamping block (34).
6. The fatigue testing device capable of loading electro-thermal-mechanical coupled field loads according to claim 1, characterized in that, The temperature control box (20) is equipped with a heat insulation layer (21) and a temperature control plate (22).
7. The fatigue testing device capable of loading electro-thermal-mechanical coupled field loads according to claim 6, characterized in that, The temperature control box (20) includes an upper box (23) and a lower box (24) that can be snapped together, and the lower box (24) is mounted on the frame (10).
8. The fatigue testing device capable of loading electro-thermal-mechanical coupled field loads according to claim 1, characterized in that, The monitoring component (60) includes a laser displacement sensor (61) and a mounting block (62). The laser displacement sensor (61) is mounted on the mounting block (62), and the mounting block (62) is mounted on the frame (10). The temperature control box (20) is provided with a monitoring hole (25) through which the laser displacement sensor (61) beam can pass.
9. The fatigue testing device capable of loading electro-thermal-mechanical coupled field loads according to claim 8, characterized in that, The frame (10) is provided with a first support plate (12) and a second support plate (13), the second support plate (13) is located above the first support plate (12), the temperature control box (20) is located on the first support plate (12), and the mounting block (62) is located on the second support plate (13).
10. The fatigue testing device capable of loading electro-thermal-mechanical coupled field loads according to claim 1, characterized in that, The electrical load source (40) includes a power source and two electrical clamps (41), the power source being connected to the two electrical clamps (41), the electrical clamps (41) being used to hold the sample inside the temperature control chamber (20).