Forming method of flange ring for automobile tail gas recycling device
A vehicle exhaust, consistent technology, applied in the field of material processing, can solve the problems of low material utilization, low mechanical properties, easy to rust, etc., and achieve the effect of ensuring forming accuracy and surface quality, high material utilization, and good application prospects.
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[0028] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the following examples.
[0029] see Figure 1 ~ Figure 3 , a method for forming a flange ring for an automobile exhaust gas recycling device, which uses a combination of reduced-diameter spinning and shrinking-mouth spinning to directly form a tube blank into a flange ring for an automobile exhaust gas recycling device. The forming method includes the following steps:
[0030] Reduced-diameter spinning step: Considering the symmetry of spinning and improving production efficiency, two parts are formed by one-time reduced-diameter spinning. The shrinking spinning process is divided into two steps, figure 2 Shown is a schematic diagram of the two-pass spinning reduction process. The outer diameter of the initial tube blank is 114mm, the wall thickness is 5mm, ...
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