In the field of automotive engineering, as long as there are three parts of the place, will be engineers called the death triangle. The most typical area is the triangle between the A-pillar and the sill line. So, then we use this area to explain why the most difficult design.
To illustrate this problem, we must first know a thing called tolerance, the manufacture and installation of any part there is a reasonable range of tolerance for a single part, the zero tolerance of a few millimeters tolerance is considered reasonable. However, when several parts at the same time in a narrow area to achieve matching, the tolerance fluctuation will be in the area of tolerance accumulation of the situation. That is, the part size is within a few tenths of a millimeter of the normal range, and the other part is within a few tenths of a millimeter of the normal range, but when they match together, these normal tolerance values Reflected as an error value, and then cause the appearance of quality and even performance defects. To the door triangle, for example, in the region of the parts include outside the rearview mirror cover, door seals, window frames, glass guide slot, window frames to strengthen the window frame bright bar and several other parts. This is almost the entire vehicle parts on the most densely overlapping areas, it is also the most prone to tolerance accumulation of the location. Therefore, after the end of the design, this position also needs to be on the gap between the number of match, the same is also touch the whole body design.
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August 2017
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