Forming and welding process of a closed cold-formed steel
A technology of cold-formed steel and welding process, applied in welding equipment, welding equipment, auxiliary welding equipment and other directions, can solve the problems of collapsed, piled up, and difficult to control the size and shape of profiled profiles, so as to achieve high welding stability, Accurate forming dimensions and reliable welding seam quality
Inactive Publication Date: 2011-12-14
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
When the first method is used for forming, the welding process is stable and the welding quality is easy to control, but the forming after welding is "empty bend", and the size and shape of the profile are difficult to control
When the second method is used for forming, because most of the rounded corners are formed by "solid bending", the forming quality is better, the size is easy to control, and it is suitable for forming more complex special-shaped sections; however, unlike round tubes, There are often small-radius circular arcs in the section of the profiled material. These small-radius circular arcs are the weak link of the force. In addition, there is no support inside the cavity, and the anti-deformation ability of the side legs of the profiled material is weak. It is easy to deform, causing the side legs of special-shaped materials to collapse inward, or the material to accumulate toward the fillet, so the welding process is difficult to control, which is a difficult problem in the current production of complex special-shaped sections
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[0029] The forming and welding process of a kind of closed cold-formed steel according to the present invention will be described in detail below in conjunction with the accompanying drawings:
[0030] Step 1, determine the strip blanking width of the final cross-section of the cold-formed steel as required, and determine the forming benchmark. Such as figure 2 As shown, the final section of the cold-formed steel is rectangular, thus forming a cold-formed rectangular tube. Take a strip steel plate with a thickness of t, and the width of the blank is the sum of the lengths of the four straight lines of the rectangular section, that is, (A+B)x2. The forming datum is set as follows: the horizontal datum is the lower side of the rectangular section, and the vertical datum is the center line passing through the center point of the lower side of the rectangular section and perpendicular to the lower side of the rectangular section.
[0031] Step 2, determine the bending angle aft...
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Abstract
The invention relates to a forming and welding process of closed cold-formed steel, which belongs to the technical field of cold-formed forming. The forming and welding process includes the following steps: A, the forming step of cold-bending the strip steel; B, the welding step of welding the formed strip steel to form a closed cold-formed steel; C, the welded closed cold-formed steel Carry out the shaping processing step. Wherein, the cold bending forming step of the steel strip in the step A also includes the step of performing arc bending treatment on the edge of the steel strip. This process has the characteristics of high welding stability, reliable weld quality, and precise forming dimensions. Production and processing of bent steel.
Description
technical field [0001] The invention relates to the technical field of cold-bending forming, in particular to a forming and welding process of closed cold-bending section steel. Background technique [0002] Cold roll forming (cold roll forming) refers to the use of multiple pairs of rolls with specific profiles at room temperature to make the metal strip continuously bend transversely while moving in a straight line in the longitudinal direction until it is processed into the desired shape of the user. A profile with a specific cross-sectional shape that does not change the thickness of its metal strip during processing. A sheet metal deep processing process. Cold bending forming is also called roll forming. The profiles processed by the cold-formed forming process are called cold-formed steel. According to whether its section is closed or not, cold-formed steel is divided into three different types: open cold-formed steel, semi-closed cold-formed steel and closed cold-fo...
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IPC IPC(8): B21C37/08B21C37/30B23K37/00B23K13/00
Inventor 艾正青刘继英
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY