CX-TOP as a precision machining business for many years, I have to answer this question. It is a concept frequently used in machining. From design to machining a part must pay attention to the economy, because the economic benefits are based on the factory to exist. Precision grade level is determined according to the requirement, on the aviation aerospace parts requires high precision, and parts of the tractor may require relatively low.
The parts cost is closely related with the precision, accuracy 7 should be relatively high accuracy, and further on, such as six, five, four is higher accuracy, each additional level of accuracy, difficulty processing It will exponentially increase, for machine tools and tool requirements will be higher, but also require workers to have a higher level of processing. For example, seven precision machines and tools used in general can be achieved, but we must use the grinder, and 5 will use CNC machine tools and grinding, and even hand-polished, four six harder. Each additional level of accuracy, a few more steps may be, the use of several sets of better tools, the use of a lot of skilled workers, which will increase the cost of a lot of parts.
So, it raises the question of economic precision machining, that is part of this precision and economical use of both combined in one occasion. For example, a part of the tractor, 11 precision has been good enough, of course, be processed into 5 precision is better, but the cost of 11 dollars may be only 10, but five is likely to be 100 or higher , the factory is unfavorable.
So-called economic precision that has satisfied the requirements under conditions of minimum accuracy, the lowest cost, so as to achieve the purpose of seeking to maximize the benefits. After my analysis, you should be able to feel it with the machine relationship process planning, process planning should be developed based on economic accuracy. I hope my answer useful to you.
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