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CIMS Technology In PCB Assembly
Sep 14, 2017

PCB Online:

In the domestic PCB board assembly industry is rapidly using surface mount technology (SMT), the domestic STM production line has reached more than 10,000 articles. PCBA industry in the important processing equipment are computer-controlled automated production equipment. These automated processing equipment in the production of a printed circuit board (PCB) before the need for programmers to spend a long time for data preparation and programming, and the vast majority of electronic products manufacturers, especially with independent development and design capabilities of high-tech enterprises with products Update fast, multi-species, small batch production characteristics, which requires processing equipment production preparation time is short, effective production time, to meet the characteristics of the production requirements and shorten the product research and development - into the market cycle. How to establish organic information integration and sharing between CAD design systems and automated production equipment, namely the design of automation and production automation of these "automated island" for the flow of information on the connection, removal of product design and product manufacturing between the "wall" , It is the computer integrated manufacturing system (CIMS) technology to solve the problem.

In the PCBA industry, the entity of the CIMS system is built on the plant computer network and database, and is a paperless manufacturing information system that improves the quality, capacity and yield of circuit assembly. The system can control and monitor the assembly line equipment such as silk screen machine, dispenser, placement machine, plug-in machine, test equipment and so on. In the event of a problem, CIMS can feed the information back to the operator or process engineer and indicate the exact location where the problem occurred. A more complete CIMS system should have the following four elements:

First of all, the system to achieve CAD and computer-aided manufacturing (CAM) information integration, which is the most basic part of the CIMS system. Automated design and automated manufacturing subsystems between the information integration, can help to achieve CAD data to the production equipment required for the automatic conversion of manufacturing data, that is, to achieve automatic programming. This feature makes it easy to convert products on the production line. Once the products on the line have the requirements of conversion, they can be automatically reflected in the machine program, test data and documents through the CIMS system, without the need for each device to be individually programmed or modified, which means that the past few hours even A few days to achieve the product conversion, now a few minutes can be achieved. This article will focus on how to implement CAD / CAM integration in the following sections.

Second, CIMS should provide tools for manufacturability analysis and testability analysis. Through the analysis of the manufacturability of the CAD files from the design department, the problem of violation of the placement rules is fed back into the design system, which can promote the parallel engineering of the design and manufacturing system, improve the design success rate, and the testability analysis The tool provides the designer with a complete measurable rate analysis report to properly and efficiently schedule and test resources and to help the design engineer improve the testability of the product.

Third, CIMS can provide a reference for the production schedule, through a comprehensive analysis to consider the product to be assembled, the machine occupancy rate, delivery cycle requirements and other parameters, the system will maximize the production assembly efficiency. CIMS can be used for direct short-term scheduling, but also for long-term strategic consideration of plant capacity.

Finally, CIMS will contribute to the balance of the production line and process optimization. A major feature of CIMS is the optimization of assembly by automatically balancing the loading and sorting of components, the distribution and placement of components, and the speed of the equipment. At the same time, the system should also be able to reasonably choose between allocating parts to the right machine or by manual assembly.

With the help of the relevant state institutions, China has established a number of CIMS typical application projects in the machinery manufacturing industry. There have been Beijing Machine Tool Works, Huazhong University of Science and Technology, which has won the International CIMS Promotion and Application Award, which indicates that China has been promoted in CIMS research and development Into the international leading level. But in the electronics manufacturing industry is very few factories really implement CIMS project.

Recently, SMT technology in the domestic PBCA industry is rapidly being used in recent years has introduced tens of thousands of advanced SMT automated production lines, these production lines are basically computer-controlled automation equipment for the PCBA industry to create a favorable CIMS project condition.

For the current situation of China's PCBA industry, in recent years to accept the implementation of CIMS machinery industry experience in the PCBA industry, the implementation of CIMS project, not necessarily exhaustive, the key is the application of CIM. PCBA industry application CIM technology, so that enterprises with multi-species, small batch production characteristics, improve the ability of enterprises to respond quickly to market changes, thereby enhancing the competitiveness of enterprises in the global production of large.

From the PCB design to the assembly is completed, CIMS for the PCBA manufacturers to provide a powerful tool, regardless of the types of components, the type of substrate, PCB board size, the use of different technology, CIMS can provide a complete solution, At the same time, CIMS is also the integration of heterogeneous equipment, for the rapid conversion of products, quality and yield to provide protection.