Forming processing method for large-scale loop-forming element
A technology for forming and processing annular parts, which is applied in the field of manufacturing large annular parts, can solve the problems of difficulty in guaranteeing the flatness of annular parts, and achieves the effects of good flatness after processing, small amount of machining, and low manufacturing cost.
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specific Embodiment approach 1
[0018] Specific Embodiment 1: In this embodiment, the special-shaped cross-section ring is bent and formed through the following scheme: segmental forging into a square billet or cutting a straight billet from a steel plate → processing a reference plane → machining a cross-sectional shape → pressing forming → drawing a line Removing the end→processing the welding groove→tailor welding into a ring part→finishing on site, the specific process is as follows:
[0019] 1. Divide it into n subsections according to the diameter of the preformed ring, and the blank size of each subsection is determined as follows: each ring is composed of n sections, and the length L of each section blank is: L=2πR / n+(1~ 2) *H, L size or the number of segments n should consider the length of the steel plate and ensure the transportation requirements after being pressed into an arc segment. Since there are straight segments at both ends of the ring when it is bent, it cannot meet the curvature requirem...
specific Embodiment approach 2
[0027] Specific implementation mode two: In this implementation mode, φ8.5m, cross-sectional net size such as figure 1 The ring part shown in the press forming is taken as an example, and it is formed through the following schemes: segmental forging into a square billet or cutting a straight billet from a steel plate → processing the reference plane → machining each side and cross-sectional shape → vertical or Horizontal press forming→drawing the line to remove the end→processing the welding groove→tailor welding to form a ring part→finishing on site, the specific process is as follows:
[0028] (1) First divide it into 6 sub-sections according to the diameter size 8.5m of the preformed ring, and the blank size of each sub-section is determined as follows: each ring is composed of 6 sections, and the length L of each section blank is: L=2πR / 6+(1~2)*H=5.2m, since there are straight sections at both ends when the ring parts are pressed, which cannot meet the curvature requireme...
specific Embodiment approach 3
[0032] Specific implementation mode three: this implementation mode takes the tailor welding of a circular piece with a diameter of φ8.5m composed of six petals as an example. The circular piece is welded by manual arc welding, and the welding groove adopts a symmetrical double U-shaped groove. When starting welding, Some plastic plates are uniformly placed between the ring member and the rigid platform to reduce the friction between the two, so as to eliminate the residual stress due to frictional resistance to the greatest extent. The welding sequence of ring parts is as follows:
[0033] a) When welding the first layer of welds, 6 welders are distributed on both sides of the 3 vertical welds, and weld symmetrically at the same time. For each weld, one person welds the upper part of the counterpart, and the other welds the lower part of the counterpart. After welding, clean the root of the other party's weld, and then weld the remaining half of the weld.
[0034] b) Welding...
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