Numerical modeling and optimization of laser soldering for Micro‐USB electric connector

Zeng, Zhi; Li, Xunbo; Wang, Rui; Li, Miao

doi:10.1002/jnm.1995

Cited by 5 publications

(3 citation statements)

References 18 publications

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“…Due to thermal cycling or mechanical stress, the solder joint may weaken or fail over time. On the other hand, if the temperature of the solder joint exceeds the target temperature, the electronic components being soldered may overheat, leading to oxidation, deformation, or even melting, which could also result in a decline in the quality of the solder joint [ 28 ]. Therefore, controlling the temperature of the solder joint is critically important in the laser soldering process.…”

Section: Methodsmentioning

confidence: 99%

Variable-Structure Proportional–Integral–Derivative Laser Solder Joint Temperature Intelligent Control Method with Adjustable Power Upper Limit

Li,

Cao,

Zhang

et al. 2023

Micromachines

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Laser soldering is a crucial soldering technique in the realm of electronic assembly. The temperature of the solder joint is intimately connected with the quality of the solder. This paper introduces an adjustable power upper limit variable-structure Proportional–Integral–Derivative (PID) intelligent control method for regulating the temperature of the solder joint during laser soldering. Distinct laser power limits are employed for workpieces with varying heat capacities. The solder joint temperature is monitored through an infrared thermometer, which enables closed-loop temperature control via a variable-structure PID algorithm. Residual neural network (ResNet) models are utilized to predict key soldering process parameters. This method has been executed and validated on a practical testing platform. Compared to other laser soldering control techniques, the proposed method demonstrates a low overshoot, rapid dynamic response, and swift adjustment capabilities, effectively enhancing the soldering quality and production efficiency.

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Section: Methodsmentioning

confidence: 99%

Variable-Structure Proportional–Integral–Derivative Laser Solder Joint Temperature Intelligent Control Method with Adjustable Power Upper Limit

Li,

Cao,

Zhang

et al. 2023

Micromachines

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“…Compared with traditional hand-soldering [1]- [3], HBS has several advantages, such as simple operation, simultaneous welding of multiple solder joints, good welding consistency, excellent welding quality, and easy automation. It is widely used for solder welding of printed circuit boards, flexible circuit boards, tinned flat copper wires, and coaxial cables [2], [4]- [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Servo-Pressurized Mode on Soldering Process Characteristics of Micro-Parts

Zhang

Yang

et al. 2022

IEEE Access

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To solve the problems of high pressure fluctuations and uncontrollable process pressure in the traditional pneumatic pressurized hot-bar solder welding process, a servo-pressurized system with high dynamic pressure and displacement responses was designed during this study using a servo motor. Focusing on the connection requirements between narrow-gap coaxial cables and printed circuit boards, the overall scheme of the system was designed, the dynamic characteristics of the mechanical structure of the system were analyzed, the hardware and software design processes for the control system were described, and a stage-type pressure-following motion control scheme for the hot bar suitable for solder-forming control was proposed. By conducting solder welding tests on narrow-gap coaxial cables with and without the control scheme, the welding process characteristics and joint qualities after welding were analyzed. The results show that when using the control scheme for solder welding, the welding pressure changes during the solder welding process trended first from a rapid increase to a slow decrease, then to a rapid decrease, to a slow decrease, and finally to a near zero value. "Soft contact" pressurization between the hot bar and the welded workpieces was achieved, the pressure fluctuations were reduced, and better surface and higher strengths were obtained for the welded joints.INDEX TERMS Hot-bar soldering, servo-pressurized system, stage-type pressure-following, solder welding, process characteristics analysis.

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“…21 The collaborative optimization (CO) method minimizes the deviations between target value from system level and response value from sub-system level using compatibility constraints. [22][23][24][25][26][27][28][29] In this study, a coupling relationship coordination algorithm (CRCA) is integrated into the framework of MDO based on large-scale systems control and coordination strategy. In CRCA, whole system is divided into several sub-systems (disciplines) along discipline boundaries.…”

Section: Introductionmentioning

confidence: 99%

A multidisciplinary coupling relationship coordination algorithm using the hierarchical control methods of complex systems and its application in multidisciplinary design optimization

Yuan

2017

Advances in Mechanical Engineering

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Because of the increasing complexity in engineering systems, multidisciplinary design optimization has attracted increasing attention. High computational expense and organizational complexity are two main challenges of multidisciplinary design optimization. To address these challenges, the hierarchical control method of complex systems is developed in this study. Hierarchical control method is a powerful way which has been utilized widely in the control and coordination of large-scale complex systems. Here, a hierarchical control method-based coupling relationship coordination algorithm is proposed to solve multidisciplinary design optimization problems. Coupling relationship coordination algorithm decouples the involved disciplines of a complex system and then optimizes each discipline objective at subsystem level. Coupling relationship coordination algorithm can maintain the consistency of interaction information (or in other words, sharing design variables and coupling design variables) in different disciplines by introducing control parameters. The control parameters are assigned by the coordinator at system level. A mechanical structure multidisciplinary design optimization problem is solved to illustrate the details of the proposed approach.

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Numerical modeling and optimization of laser soldering for Micro‐USB electric connector

Cited by 5 publications

References 18 publications

Variable-Structure Proportional–Integral–Derivative Laser Solder Joint Temperature Intelligent Control Method with Adjustable Power Upper Limit

Variable-Structure Proportional–Integral–Derivative Laser Solder Joint Temperature Intelligent Control Method with Adjustable Power Upper Limit

Effect of Servo-Pressurized Mode on Soldering Process Characteristics of Micro-Parts

A multidisciplinary coupling relationship coordination algorithm using the hierarchical control methods of complex systems and its application in multidisciplinary design optimization

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