PCBA Tech - Quality management in SMT production

Surface assembly technology is a systematic project. It has dense technology and knowledge in large-scale surface assembly production, with large equipment investment and high technical difficulty. Due to the high-quality and high-precision of the equipment itself, the system and high-precision are ensured, and automatic line operation is realized. Under normal circumstances, the equipment failure rate is very low, but poor system adjustment, improper operation, abnormal power supply and gas supply, poor production environment, and poor process connection will all lead to an increase in equipment failure rate. In actual production, good equipment was available in time, but due to improper technology, the product was replaced, and the soldering furnace temperature curve was not replaced in time, which often resulted in increased soldering defects and poor storage conditions for components, PCB boards, solder paste, and patch adhesives. Regulations can lead to poor solderability of components. There are many reasons for welding defects. In some SMT factories, the initial product failure rate is as high as 10% or more. Therefore, quality management in SMT production has received more and more attention from many SMT manufacturers, and SMT quality management is regarded as an integral part of SMT. This is the summary of previous experience and lessons, and it is also a re-understanding of SMT technology.

The iso9000 series of standards are international standards that are established in 1987 by the International Organization for Standardization in Geneva, Switzerland, which teaches standardization organizations from various countries. The standards are designed to further improve the quality management of manufacturers. This standard is revised every five years Once again, this standard has been recognized and valued more and more by governments, organizations, and factories all over the world over the years, regardless of national borders or industry, and has actively applied for the review of the standard. Why does the series of standards receive the attention of so many industry factories? This is because the global economic competition has intensified. Production managers need to find a single heart to be effective, a quality assurance system, to improve the quality of their products, and to gain access to the outside world. The purpose of this standard is to help managers to achieve their predetermined policy goals by determining a practical and effective quality management system.

In the iso9000 standard, the quality management system clearly puts forward the twenty elements and the standards that these elements should meet. The essence of the twenty elements is called the human-machine-material-law circle. It has practical operability, but also has the continuity of inheritance and development. The iso9000 series of standards are the result of the summary and sublimation of the experience of implementing total quality management in countries all over the world. It can be considered that there is no total quality management practice in the previous decades. It can be considered that without the practice of total quality management in the past few decades, it is impossible to have the current iso9000 series of standards, and its future will continue to be affected by the development of total quality management and become more perfect and more effective.

Many factories vividly regard the ISO9000 series standards as a passport to the world economy. They are also a bridge of sight and communication between different industries. Through this system, different manufacturers and different departments have good communication and mutual support. There is a clear division of labor in large-scale social production. When every factory in each industry provides qualified products to the society, it must also accept the qualified products provided by other factories in the society.

SMT production requires high quality and high processing difficulty, which is rare in other industries. It is closely connected with many industry factories, various components, auxiliary materials, solder paste, patch glue, and PCB process methods., Processing equipment purchased parts, and there are outsourcing parts. The product designer needs the professional knowledge and must be familiar with the SMT process specifications; the welding quality continues to be guaranteed by the equipment, and it is inseparable from the experience of the people. Will cause quality accidents, especially once welding quality problems occur, the possibility of recovery and repair is very small. How to do a good job of quality management in the SMT production process, experience and lessons tell us that iso9000 series standards are the best management methods. In the SMT production process, iso9000 series standards are used as the basis, and a complete quality management system is gradually formed. It will no longer be an empty talk to move towards the world's advanced level.