By Leondes T. Cornelius
ISBN-10: 9812389792
ISBN-13: 9789812389794
This can be a useful five-volume reference at the very large and hugely major topic of machine aided and built-in production platforms. it's a set of rather titled and well-harmonized volumes via top specialists at the overseas scene. The suggestions and applied sciences utilized in laptop aided and built-in production structures have produced, and may without doubt proceed to provide, significant annual advancements in productiveness, that's outlined because the items and providers made from each one hour of labor. This ebook bargains rather with better usage of work and capital, in particular details know-how structures. jointly the 5 volumes deal with comprehensively the main recommendations and applied sciences which are concerned.
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Extra resources for Computer Aided And Integrated Manufacturing Systems, Volume 5: Manufacturing Processes
Example text
However, this is compensated by less frequent setup operations, which compensates the losses in machine speed especially in high-mix, low-volume production. There are variations of the group setup strategy, where a certain set of common or standard components are left on the machine, while the rest of the components (residual or custom) are added or removed as required for a particular board. 22 describe a group setup (GSU) method for a high-mix lowvolume production environment. The products are divided into groups, each of which is produced in two stages: set up common components and insert them to the PCBs of the whole group, and set up the residual components and insert them on each PCB separately.
20 Jouni Smed et al. problem as a three-dimensional asymmetric traveling salesman problem. The optimal assignment of the components to the feeders for a fixed insertion sequence can be formulated as a quadratic assignment problem. The overall problem can then be solved heuristically, which brings suboptimal but, in practice, satisfactory solutions. Chang and Young 23 introduce a hypothetical machine design for simultaneous mounting. The machine comprises one or more robots or a robotized pick-andplace head, a component supply device (movable or fixed), and an assembly holding device (movable or fixed).
Changes, the converter can be changed or—if a corresponding converter does not yet exist—it can be implemented in a short period of time. Because all processing is done with the generic code format and the machine configuration files are used to fine-tune the optimization algorithms, the system can be used in different machine configurations. Consequently, the system is general and can be easily tailored to suit new machine types. 6. Final Remarks We have reviewed in this paper theoretical and practical approaches to production planning in PCB assembly.