1.1 Current status of SMT workshop

 

SMT (Surface Mount Technology) is a classic production method of PCBA (Printed Circuit Norad Assembly), the core component of electronic products. The classic process is: upper board → printing → patch → reflow soldering → AOI inspection → lower board. Compared with the traditional THT (Through-hole Technology) electronic assembly process, the SMT process can achieve features such as miniaturization, high-density assembly, and high automation. SMT has become the most widely used assembly method in the electronics industry. The SMT workshop, as a workshop born with the application of SMT technology, uses many types of production materials and most of them are roll materials with similar shapes. The production materials have temperature and humidity requirements and anti-static requirements for the environment, and need to rely on Feeder ) Focusing on placement on the placement machine and other characteristics that are different from traditional workshops.

 

 

The SMT workshop mainly manages the following aspects:

 

(1) Workshop temperature and humidity management: The main method for the management of workshop temperature and humidity is to rely on air conditioners and other equipment to adjust temperature and humidity, use a calibrated thermometer and hygrometer for secondary confirmation and regular manual recording.

 

(2) Material supply management: Due to the special process of SMT production, the required materials must be supplied to the production line at one time. Otherwise, it will cause a waste of time for the second adjustment of the machine or a waste of man-hours for manual repair welding after the empty paste, which will cause a big change in the production cost. Although most companies borrowed information management systems for auxiliary management, the actual sorting, handling, and material handover work is still done manually, which is relatively time-consuming and labor-intensive, and can easily lead to secondary human injuries.

 

(3) Material error prevention management: Because most of the materials in the SMT workshop have the same shape, the electrical performance parameters of the products are quite different. For example, the chip capacitors CC0402JRNPO9BN101 and CC0402KRX7R8BB104, although the package size is the same, but the capacitance value, withstand voltage and material , Accuracy is not the same, and there is no silk-screen logo on the surface, after mounting, only the relevant instruments can be used to measure the capacitance value. It will have a non-negligible impact on the production of products. Therefore, in order to cause misposting in production, the management method adopted is to install the feeder loaded with the product on the corresponding position of the placement machine after the quality personnel and the production personnel jointly check the error beforehand, and then perform the repetition on the first piece. Measure some measurable parameters to confirm that the placement is correct. To reduce the probability of error by consuming a lot of manpower and time, this method reduces the error rate to a relatively low point, but there is no such guarantee when replacing materials, which increases the probability of wrong materials.

 

1.2 Intelligent analysis of workshop

 

Since the implementation of reform and opening up in 1978, my country's manufacturing industry has achieved world-renowned achievements from being poor and white to the world's second largest economy in the past 40 years, which has also enabled my country to become a major manufacturing country. At the same time, there are many difficulties in the process of development, which restrict the manufacturing industry from moving forward. Mainly reflected in the following three aspects:

 

(1) Demographic factors: my country is a populous country. In the early stage of reform and opening up, relying on the huge labor force and cheap labor price factors, it attracted a large amount of foreign capital to invest and build factories in China. The huge demographic dividend has laid a solid foundation for the development of my country's manufacturing industry. With the development of society, our country has gradually entered an aging society, which has led to a huge reduction in the number of people of working age in our country by millions. Accompanied by the fading of the demographic dividend and the rise of the cost of population factors, the advantage of demographic dividend will never return. .

 

(2) Manufacturing value-added: According to the definition of the smiling curve, manufacturing is the lowest value-added part of the industry chain, and can only rely on continuous expansion of production capacity to maintain profits. In the early stage of reform and opening up, in view of the domestic and international situation in which the supply of my country was in short supply, relying on factors such as cheap labor and government policy support, my country's manufacturing industry began to set sail and blossom everywhere. Facing the current demographic dividend fading, oversupply of production capacity and the rapid development of the Internet, the product chain has been made transparent. In the case of certain manufacturing problems, the way for each manufacturing workshop to expand production capacity is greatly restricted.

 

(3) Workshop information management system: According to incomplete statistics, only 10% to 20% have successfully implemented ERP integration. About 30% to 40% did not achieve integration or partial integration, while about 50% failed. A consensus has been formed that "going to ERP to find death but not going to ERP is to wait for death". ERP is an advanced and mature enterprise resource management system based on information technology that integrates corporate management concepts, business processes, basic data, human resources, and computer software and hardware. It can make our management more accurate and efficient, but The domestic implementation and application status and application effects are not satisfactory.