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The basic principle of virtual forming of SMT solder joints The principle of SMT solder joint virtual forming technology based on solder joint morphology theory can be expressed as shown in Figure 6.7. The input is the preliminary parameters of the solder joint shape and the PCB, soldering solder, SMC/SMD and its pin types related […]

The construction target and structure design of the quality management system The construction of SMT product assembly quality management system will eventually achieve the following goals: (1) Establish a reliable and complete quality assurance system; (2) Use computer and network database, expert system and other technologies to complete quality data collection, statistics, analysis and feedback; […]

About the functions and performance requirements of the SMT quality management system Function description of quality management system The functions of SMT product assembly quality management system mainly include the following: (1) Product design quality verification Including product design and assembly process standards, specification verification and product technical index verification, etc. (2) Quality inspection and […]

SMT quality management system establishment procedures The process of establishing a quality management system can be divided into three stages: preparation stage, program design stage, and organization implementation stage. (1) Preparation stage The preliminary preparations for establishing a quality management system mainly include unifying guiding ideology, implementing organizational structures, and training technical backbones. The establishment […]

Principles and standards of modern quality management On the basis of summarizing and absorbing the essence of quality management theories from all over the world, the relevant working group of the International Organization for Standardization put forward eight principles of modern quality management: (1) The principle of focusing on customers; (2) Principles of leadership; (3) […]

Structure and Module Design of Solder Joint Quality System Based on Neural Network The structure of the SMT solder joint quality analysis and evaluation expert system based on neural network is composed of the actual needs to solve the problem of SMT solder joint quality analysis and evaluation. The structure of the traditional expert system […]

Basic Principles of the Expert System for Solder Joint Quality Analysis and Evaluation There is an inevitable relationship between SMT solder joint shape and solder joint quality, solder joint structure and process parameters. The quality of solder joints can be compared, analyzed and evaluated through the design expert system. In the analysis and evaluation expert […]

Basic principles of detection and control technology 1. Basic principles of real-time detection and control The solder joint shape and the solder joint quality have a corresponding relationship. Through the observation and analysis of the solder joint shape, the quality of the solder joint and the solder joint assembly failure can be distinguished. The real-time […]

Software design of virtual forming technology of SMT solder joint The first part is the SMT solder joint forming software. Its function is based on the principle of minimum energy in the solder joint system, using Surface Evolver fluid forming software, using finite element methods, and with the help of various established and stored initial […]

What are the main steps of the SMT solder joint stress analysis method Establish material stress-deformation relational database The material stress-deformation relational database is an important content of the input data for stress analysis design, which is directly related to the accuracy of stress analysis. The establishment of a material stress-deformation relational database is a […]