TAILIEUCHUNG - Recent Advances in Mechatronics - Ryszard Jabonski et al (Eds) Episode 1 Part 10

Tham khảo tài liệu 'recent advances in mechatronics - ryszard jabonski et al (eds) episode 1 part 10', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 344 J. Sitek Z. Drozd K. Bukat Fig. 4. Examples of soldering problems a the SOT23 - Sn wetability problems b the QFP64 pitch component - small pitch and pad design problems. Probably a nitrogen atmosphere and improve pads design near the QFP64 components should improve wave soldering results in this situation. The further investigations are planning in this subject. Summary Printing process is the most critical during assembly of complex PCBs in lead-free technology. The dedicated nozzles for pick and place machine are essential for assembly components sizes 0201 or smaller as also BGA and CSP. The complex PCB in lead-free technology requires soldering profile with about 250 C peak temperature and precise convection oven with 5 or more heating zones. The minimalization of thermal processes previous a wave soldering good quality of PCB finish adequate PCB pads design and more active flux are recommend for lead-free wave soldering of complex boards. Acknowledgements This work was realized as a part of the GreenRoSE - Collective Research Project - 2004-500225 funded by the EC under the 6FP. References 1 Directive 2002 95 EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment Official Journal of the European Union pp. 19-23 2 J. Klerk Large Complex Boards . ELFNET at SEMICON Conference 5-6th April 2006 Munich Germany Applying Mechatronic Strategies in Forming Technology Using the Example of Retrofitting a Cross Rolling Machine R. Neugebauer D. Klug M. Hoffmann T. Koch Fraunhofer Institute for Machine Tools and Forming Technology Reichenhainer Strabe 88 Chemnitz 09126 Germany Abstract A machine for manufacturing bulk metal forming parts a cross rolling machine with flat jaws will be used as an example to demonstrate the idea of retrofitting metal forming machines that is based on linking single mechatronic components to one overall mechatronic system. The purpose of retrofitting was boosting the machine s .

TỪ KHÓA LIÊN QUAN
TÀI LIỆU MỚI ĐĂNG
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.