Forming method for asymmetric pentagonal thin-wall cold-bent steel pipe with sharp corner
A forming method and asymmetric technology, applied in the field of cold forming, can solve the problems of high defective rate, difficult finishing forming, unstable welding quality, etc., and achieve the effect of easy export, stable extrusion welding, and ensuring smoothness and smoothness.
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[0033]In order to better understand the present invention, the invention will be described in detail below in conjunction with specific examples.
[0034]In this example, the molding tube (with tipless non-symmetric pentagonal thin-walled crescent steel tube) is formed by the bottom side 1, the outer waist 2, the outer welded edge 3, the inner weld side 4, and the inner waist 5. The symmetric heterogeneous shape, and its bottom side 1 and the outer waist 2 angle α1 is 90 °, the bottom side 1 and the inner waist side 5 angle α2 is 90 °, the angle of the outer waist 2 and the outer welded edge 3 α3 is 116.7 ° and the angle α4 of the inner waist 5 and the inner weld side 4 is 135.7 °, the outer welding edge 3 and the inner welding edge 4 are welded to form a sharp corner 6, the centerline OO of the molding tube is a sharp angle 6 And the line segment perpendicular to the bottom side of the molded tube.
[0035]A molding method of a tape angle non-symmetric pentagon thin-walled steel tube, in...
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