CN-122016455-A - Welding spot mechanical behavior research test device considering boundary condition influence

CN122016455ACN 122016455 ACN122016455 ACN 122016455ACN-122016455-A

Abstract

The invention provides a welding spot mechanical behavior research test device considering boundary condition influence, which comprises a welding spot welding structure test piece, a mechanical load actuator and an environmental load test box, wherein the welding spot welding structure test piece is used for simulating the installation boundary of a welding spot in electronic equipment, the mechanical load actuator is used for applying mechanical load to the welding spot welding structure test piece, and the environmental load test box is used for carrying the welding spot welding structure test piece and providing a specific temperature and humidity environment for the welding spot welding structure test piece.

Inventors

HE TIANYU
YANG CAN
CHEN JINHU
HU YANPING
MA SIPENG
GE GUANGYA
LI YANZHE
CHE YUJIAO
Gao Kuiken
ZHANG QUN

Assignees

北京强度环境研究所

Dates

Publication Date: 20260512
Application Date: 20260319

Claims (8)

1. The invention provides a welding spot mechanical behavior research test device considering boundary condition influence, which comprises: the welding spot welding structure test piece is used for simulating the real installation state of the welding spot in the electronic equipment; the mechanical load actuator is used for applying mechanical load to the welding spot welding structure test piece; the environment load test box is used for carrying the welding spot welding structure test piece and providing a specific temperature and humidity environment for the welding spot welding structure test piece.
2. The device for research and test of mechanical behavior of welding spots considering influence of boundary conditions according to claim 1, the welding spot welding structure test piece is characterized by comprising: The first substrate is used for simulating an electronic component connecting surface and an electric load loading interface which are connected with the welding spots; the second substrate is used for simulating an electronic equipment connecting surface and an electric load loading interface which are connected with the welding spots; And the welding spots are respectively connected with the welding end surfaces of the first substrate and the second substrate in a welding mode.
3. The device for research and testing of mechanical behavior of a welding spot considering influence of boundary conditions according to claim 2, wherein the mechanical load actuator comprises: the clamping head is used for clamping the first substrate and the second substrate; the force sensor is used for detecting the mechanical load applied by the welding spot welding structure test piece; the actuating rod is directly connected with the mechanical load loading device and used for transmitting mechanical load; and the two ends of the switching disc are respectively connected with the force sensor and the actuating rod and are used for adapting to the force sensors and the actuating rods with different specifications.
4. The device for researching and testing the mechanical behaviors of welding spots by considering the influence of boundary conditions according to claim 3, wherein the environmental load test box is of a box body structure, the opposite side end face is provided with a through hole, the actuating rod passes through the through hole, and the welding spot welding structure test piece is arranged in the environmental load test box.
5. The device for researching and testing the mechanical behaviors of welding spots by considering the influence of boundary conditions according to claim 1 or 4, wherein the environmental load test box is provided with a box door and a visual observation window, the visual observation window is used for observing the state of the test piece of the welding structure of the welding spots, and the mechanical behaviors of the tested test piece can be monitored and measured by a non-contact measurement means.
6. The welding spot mechanical behavior research test device considering the influence of boundary conditions according to claim 4, wherein a closing-in flexible seal is arranged at the through hole, and the flexible actuating rod passes through and seals the internal environment of the environmental load test box.
7. The device for research and testing of mechanical behavior of solder joint in consideration of influence of boundary conditions according to claim 2, wherein the first substrate and the second substrate are integrally formed in a plate-type structure.
8. The device for research and test of mechanical behavior of a solder joint considering influence of boundary conditions according to claim 7, wherein the first substrate and the second substrate are provided with electrical ports on the surfaces thereof for connecting with an external circuit, and a current load is applied to the test piece of the solder joint welding structure by a closed circuit.

Description

Welding spot mechanical behavior research test device considering boundary condition influence Technical Field The invention belongs to the technical field of electronic equipment welding spot mechanical property test, and particularly relates to a welding spot mechanical behavior research test device considering influence of boundary conditions. Background With the rapid development of electronic packaging technology, the integration degree of electronic equipment is higher and higher, welding spots are used as connection nodes among electronic components in the electronic equipment, and play key roles in structural connection, electric signal energy transmission and the like in the use process, and the change rule and reliability of the mechanical properties of the welding spots in the use process also directly influence the integral structural design, service life and reliability evaluation of the electronic equipment. In the actual use process, the welding spots are subjected to mechanical loads consisting of external structural vibration, impact and the like under the action of complex environmental loads influenced by mutual coupling of mechanical environmental loads, climatic environmental loads and electric loads for a long time, thermal effects generated in the conduction process of current and thermal stresses generated between the welding spots and boundaries on the basis of thermal matching distinction, so that the positions of the welding spots are extremely easy to generate fatigue fracture, interface destruction, electromigration failure and other problems, and the problems of restricting the reliability of high-end electronic equipment are solved. In the research of the mechanical behaviors of welding spots of the current electronic equipment, most researches only can realize the loading and testing of single-material-level test piece single environment load or stable composite environment load due to the limitation of a test device, and the capability of loading the test piece time-varying composite environment for a long time is lacking. More importantly, the single-material-level test piece cannot show the remarkable influence of boundary conditions on the mechanical behavior rule of the welding spot in a long-time complex environment, so that the rule obtained by the test deviates from the actual use condition, and the direct reference value of the test result is greatly reduced. In conclusion, the existing test equipment and test method cannot accurately realize the long-time complex environment load loading and the mechanical behavior rule acquisition of the welding spot in the real installation state. It is needed to design a research and test device for the mechanical behavior of a welding spot considering the influence of boundary conditions so as to obtain the mechanical behavior rule of the welding spot position of electronic equipment in a long-time complex environment. Disclosure of Invention The invention aims to overcome one of the problems in the prior art, and provides a welding spot mechanical behavior research test device considering the influence of boundary conditions, and meanwhile, the test piece can be synchronously or sequentially loaded with various composite loads such as temperature, humidity, vibration, impact, electrifying and the like, and the mechanical performance parameters of the test piece in the test process are acquired in real time to analyze the change rule of the mechanical behavior of the test piece. The invention provides a welding spot mechanical behavior research test device considering boundary condition influence, which comprises: the welding spot welding structure test piece is used for simulating the installation boundary of a welding spot in electronic equipment; the mechanical load actuator is used for applying mechanical load to the welding spot welding structure test piece; the environment load test box is used for carrying the welding spot welding structure test piece and providing a specific temperature and humidity environment for the welding spot welding structure test piece. Further, the solder joint welding structure test piece includes: the first substrate is used for simulating the connection surface of the electronic component connected with the welding spot; The second substrate is used for simulating the connection surface of the electronic equipment connected with the welding spots; And the welding spots are respectively connected with the welding end surfaces of the first substrate and the second substrate in a welding mode. Further, the mechanical load actuator includes: the clamping head is used for clamping the first substrate and the second substrate; the force sensor is used for detecting the mechanical load applied by the welding spot welding structure test piece; the actuating rod is directly connected with the mechanical load loading device and used for transmitting mechanical load; and the two ends of the switching di