design guide 01 - design for assembly

It is very important for a machine designer to consider a lot of things when building a component. Whether it's able to be processed (design for manufacture); able to assembled easily (design for assembly); and even sometimes whether our machine can be repaired easily (design for maintenance).
Manufacturing process done in the machining workshop, the assembly would be done by assembly workshop. It is very important for a design engineer to know what's happening on the process. At least little by little information we gather will certainly help a lot for the next possible project.

What does it means to use "design for assembly" consideration? It means that every part is designed and modified well to ease the assembly process. As we all know, assembly is very important process that must be done correctly in order to obtain the desired shape (and often, includes obtaining functionality too)
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weldment design 04 - product design rules

Welding may be imperfect and there's a million ways to overcome the distortion, but the best thing to do is considering the product's design carefully so that the effort on manufacturing is kept minimum
Just like plastic molding and sand casting, each welded product must be designed thoroughly according to the process they had to undergo. There is still some chance the distortion would happen, but on a straight line of procedures and a wise design, it wouldn't spend too much energy compared to a harshly designed ones.
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casting design 04 - product design rules

The most important aims in designing aluminum castings are to plan components for ease of casting production and to improve casting soundness. Planning arrangements of sections so that progressive solidification is toward the heavier sections helps reach these objectives.

This principle should be adhered to when designing for joining and changing sections. Sharp corners should be filleted because fillets prevent cracks, tears and shrinkage at re-entry angles. Additionally, make corners more moldable, and reduce stress concentration in the casting when in service. Fillets should be large enough to meet engineering stress requirements and reduce stress concentration, but not so large that they cause shrinkage.
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