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Method for processing open-web sharp-angled rhomboid tube

A processing method and rhomboid technology are applied in the processing field of hollow sharp-angle rhomboid pipes, which can solve problems such as the processing of the corners of pipes, and achieve the effect of ensuring welding quality.

Inactive Publication Date: 2010-05-19
上海佳冷冷弯科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Neither of the above two methods can make the corner of the pipe into a sharp corner with R≤2mm

Method used

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  • Method for processing open-web sharp-angled rhomboid tube
  • Method for processing open-web sharp-angled rhomboid tube
  • Method for processing open-web sharp-angled rhomboid tube

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Embodiment Construction

[0027] Such as figure 1 As shown, the four sides 1, 2, 3, and 4 of a sharp-edged rhomboid tube on an empty stomach are all planes, one corner 5 of which is a sharp corner, and the remaining three corners are rounded corners, and the butt welding seam is located on the sharp corner 5 .

[0028] The processing method of the present invention will be described in detail below by taking a fasting sharp-angled rhomboid tube in which the included angles between the four sides are all 90° as an example.

[0029] Using steel strips as raw materials, placed horizontally, first processed with a horizontal rolling mill.

[0030] Such as figure 2 As shown, in the first pass D1, rolls are used to roll the areas corresponding to the first side 1 and the fourth side 4 on both sides of the steel strip, so that the areas near the outside of the first side and the fourth side become arc-shaped surfaces. The width of the shape does not exceed the length of a single side of the product. The ...

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Abstract

The invention discloses a method for processing an open-web sharp-angled rhomboid tube. The open-web sharp-angled rhomboid tube comprises a first side, a second side, a third side and a fourth side which are sequentially connected, wherein the fourth side and the first side are in butt joint to form a sharp angle. The processing method comprises the following steps of: A, rolling areas corresponding to the first side and the fourth side on two sides of a steel band by a roller to enable partial areas of the first side and the fourth side to become arc faces; B, rolling and bending the junction of the first side and the second side and the junction of the fourth side and the third side; C, rolling and bending the junction of the second side and the third side by the roller to enable an inclined angle of the second side and the third side to be gradually reduced until the first side and the fourth side are nearly closed; D, carrying out stitch welding to completely close and weld the first side and the fourth side together; E, scraping a vertex angle at the welded part into a sharp angle by a scraper; and F, reshaping the first side and the fourth side into a plane and simultaneously reshaping the sizes and inclined angles of various sides to the final requirements.

Description

technical field [0001] The invention relates to a method for manufacturing a shaped steel pipe, in particular to a method for processing an empty stomach sharp-angled diamond-shaped pipe. Background technique [0002] In some specific occasions, it is necessary to use a fasting sharp-angle rhomboid tube. One corner of this fasting sharp-angle rhomboid tube is a sharp corner, and the remaining three corners are rounded. [0003] At present, there are mainly two ways to manufacture closed cold-formed steel pipes. One method is to weld the steel strip into a round pipe with a certain diameter, and then extrude it into the required square, rectangular, and special-shaped sections. Most of the welds are designed. On a certain plane, not at the corner, it is easy to crack, and the corners are also arcs with a certain curvature (the conventional minimum R=0.5-3t, t is the thickness of the raw material); another method is that the steel strip passes through the roll The tube blanks...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/15B21C37/08
Inventor 姜春民张静江岩
Owner 上海佳冷冷弯科技股份有限公司
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