Preface:
In the complex PCB design and manufacturing process DFM manufacturing analysis is particularly important. DFM Design for Manufacturing, Design for manufacturability (DFM) DFM role is to improve the manufacturing process of the product. Today’s DFM is the core technology of parallel engineering, because design and manufacturing are the two most important links in the product life cycle, parallel engineering is the beginning of the design should be considered when the product manufacturability and assemblability and other factors. Therefore, DFM is the most important support tool in parallel engineering. The key of DFM is to analyze the processability of the design information, evaluate the manufacturing rationality and suggest the improvement of the design. DFM combines with CAX, PDM, DFX, etc. to form the Design for Life Cycle (DFLC) technology. DFX refers to DFA (Design for Assembly), DFD (Design for Disassembly), DFQ (Design for Quality), DFI (Design for Inspection), and DFE (Design for Environment).
1 .Starting the DFM model
●In the traditional serial engineering product development model, product design and process design are two independent and sequential processes. In the traditional serial engineering product development model, product design and process design are two independent and sequential processes. This model easily leads to a disconnection between the product design process and the processing and manufacturing process, which makes the manufacturability, assemblability and maintainability of the product poor, and thus leads to the difficulty of design modification, long product development cycle, high cost, and difficult to guarantee the quality, and even a large number of designs cannot be put into production.
It is difficult to change the design, the product development cycle is long, the cost is high, and the quality is difficult to guarantee, and even a large number of designs can not be put into production, thus resulting in a huge waste of manpower and material resources.
● The concept of DFM has challenged the traditional product development mode, which breaks the sequence of traditional design methods and develops product design and process design in parallel. DFM takes into full consideration of various manufacturing constraints, processing conditions, clamping solutions, tooling design and parts standardization, etc., reviews and decides on the design solutions, and timely feedback of the review results to the designer, proposes modifications and provides guidance on product design. This is a new, simpler and more effective product
2 . DFM Design Assistance
● DFM assists in the design of principles:
The principles of DFM design assistance are:
1. Reduce costs and improve product competitiveness
2. Optimize production process, improve production efficiency
3. Technology transfer, strengthen the company’s collaboration
4. The basis for new product development and testing
5. Suitable for electronic assembly process new technology
●Because of the different processing technologies, the corresponding method also has a big difference, so the specific design for different processing must have different specific design principles.PCB bare board DFM design and PCB assembly DFM design need to consider the principle of manufacturability design, and also need to consider the correctness of the procurement of electronic components. However, the purpose is to enable the product to be manufactured quickly and economically, to improve the one-time success rate of product design and manufacturing, so as to reduce costs and shorten the product development cycle.
3. DFM Industry Applications
The most mature technology development in the industry, the integration of design and manufacturing and platform has been integrated into the software and rule base and is sufficiently detailed and enforceable.
The integration and platformization of design and manufacturing have been integrated into the software and rule base, and are sufficiently detailed and executable. Many internationally famous enterprises have maturely applied DFM technology tools in development and design and have “tasted the sweetness” from them, such as Dell and Intel in the computer industry, Ford and BMW in the automobile industry, and Boeing in the aeroplane manufacturing field.
● Take PCB design as an example, in the development trend of electronic products to miniaturization, high density and high speed, the complexity of PCB design has increased greatly, how to effectively carry out comprehensive quality control of complex PCB design has become a difficult problem in this field.
● DFM can realize the manufacturing and design process in parallel, simulating the entire production process from design, and manufacturing to assembly of selected PCB products, BOM table organization, component matching, bare board analysis and assembly analysis of the four blocks
BOM list sorting, component matching, bare board analysis and assembly analysis of four blocks are interlinked and work together to complete a DFM analysis. The whole software operation process: DFM parses the PCB file, ODB file or Gerber file, imports the BOM table and then matches the component libraries, matches the components through the created component libraries, and finally conducts a series of inspections on the files by invoking the rules in DFM. The whole process is equivalent to incorporating manufacturing rules into the design phase, establishing a new PCB design process to minimize the cycle time extension caused by design changes and to ensure production quality and efficiency. All possible quality hazards are solved or discovered in the premanufacturing phase, minimizing the number of product development generations, reducing costs, and improving product competitiveness in the market.
4 、 DFM Future Prospect
In China, the application of DFM technology in manufacturing enterprises started late, and the scale has not yet been established. 2001, BDI’s DFMA analysis software entered China. Huawei Technology Co., Ltd. requires DFMA as a design concept and tool that every structural engineer must master. However, not many domestic enterprises are using DFM-related technologies for product development. However, not many domestic enterprises are using DFM related technology for product development, and many of them are still using traditional serial methods for product design. It is obvious that domestic enterprises still have a long way to go in applying advanced development tools and methods, and product design is the source, and China’s manufacturing industry should make better use of these advanced design tools and methods in order to enhance the international competitiveness of its own products.
