Do you have to mark the length of a part in mechanical drawing? I also can be the mechanical cartography, really did not listen to the teacher said to the chief, in the book have not seen this sentence. Just listen to the teacher said, in the assembly plan to mark the total length, height, width. That's for the convenience of packing boxes. For example, I do not want to guarantee a part of its length, but in the middle of each size, I marked the total length is not wrong, and closed ring can also be the length of the ah. Now I work units that must mark the total length, and they compete for profit. I also don't know the basic knowledge of mechanical drawing. I wonder if there is a requirement for this rule
General standard length do you think if you are processing personnel or material you must know it is you can also let people go well, a principle to remember is to consider on you do not affect the case of others. You can mark the height of the label you want as the associated size
The total length has no size, it seems that the painting is not standard, the general box has a total length, even if it is not the processing surface, you have to give a total length of nominal size
A total length of a certain truth, such as easy cutting, easy processing (such as the big machine, easy to heat treatment), ease of assembly, so that people see, you should take control of size is not important for the free length to form a closed size.Mechanical drawing dimensioning can improve product quality and improve production efficiency, which is not necessarily inconsistent with mechanical drawing standards, which has a lot to do with practical experience, especially the choice of benchmark.
