CN101105065A - Method for preparing ellipse-like hole honeycomb web plate - Google Patents
Method for preparing ellipse-like hole honeycomb web plate Download PDFInfo
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- CN101105065A CN101105065A CNA2007100549146A CN200710054914A CN101105065A CN 101105065 A CN101105065 A CN 101105065A CN A2007100549146 A CNA2007100549146 A CN A2007100549146A CN 200710054914 A CN200710054914 A CN 200710054914A CN 101105065 A CN101105065 A CN 101105065A
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Abstract
The invention relates to the technical field of building steel structure, particularly a manufacturing method of oval-like honeycomb beam web. The manufacturing method comprises determining the size of ellipse sample, determining two boundary lines on the beam web, marking the central and the corresponding semi-elliptic curves of the ellipse sample on each of the two boundary lines (the semi-elliptic curves are crossed to each other), connecting the crossing points if the connection line of the adjacent crossing points is parallel o the boundary line to obtain two line groups in parallel to the two boundary lines and positioned at the same side of the central line; combining the semi-elliptic curves with centers being on the same boundary line with the line groups homolateral and parallel to the two boundary lines to form a cutting line and trimming line, cutting the I-shaped beam web along the cutting line to form a concave part and a rim part; trimming the rim part along the trimming line to form another concave part; performing misplaced welding of the concave parts to obtain an oval-like honeycomb beam web. The method greatly increases the production efficiency of oval-like honeycomb beam web, reduces the waste produced during perforation, saves the steel products, and reduces the production cost.
Description
(I) technical field
The invention relates to a preparation method of an elliptical hole honeycomb beam web plate in the field of building steel structures.
(II) background of the invention
A steel beam is one of the most important load-bearing members in steel structural engineering, and an i-shaped steel beam is one of the most widely used members. The upper and lower flanges of an i-shaped steel beam mainly bear bending moment, and the web plate mainly bears shearing force, and the beam is mostly a bending member, especially a large-span beam, so that the height of the beam is usually made larger in order to improve the bending moment of inertia of the beam. In this case, the web may not sufficiently function as a steel material. Therefore, the proper amount of holes are formed in the web plate, so that the steel consumption can be reduced without affecting the bearing capacity, and a better technical and economic effect is achieved. Meanwhile, the opening can be used as a passage for various pipelines to pass through, and the use efficiency of the space in the structure is improved.
At present, most of perforated I-shaped steel beams produced and used at home and abroad adopt honeycomb beams with hexagonal holes. The production process of the beam is simple, but the corner points of the hexagon are easy to generate stress concentration, and the steel cannot give full play to the material performance. Therefore, some production units begin to produce honeycomb beams with elliptical holes at present, abrupt corner points do not exist in the section form, stress concentration cannot be generated, and the stress performance is more reasonable. However, the production process of the section form is complex, and at present, a method of directly forming holes in the web is mostly adopted. The method has low production efficiency, generates more waste materials when drilling holes and wastes steel.
Disclosure of the invention
The invention aims to provide a preparation method of an elliptical hole-like honeycomb beam web, which has the advantages of high production efficiency, less generated waste, steel saving and cost reduction.
The technical scheme adopted by the invention is as follows:
a preparation method of an ellipse-like hole honeycomb beam web plate, wherein an ellipse is defined by two symmetrical ellipse arc lines, comprises the following steps:
1) Determining the length of the ellipse where the elliptic arc line is located, namely the length of the major-minor semi-axis of the lofting ellipse according to the size of the elliptical hole to be opened, wherein the formula is as follows:
wherein, a 'is the length of the major semi-axis of the ellipse-like hole, and b' is the length of the minor semi-axis of the ellipse-like hole; a. b is the length of the long semi-axis and the short semi-axis of the lofting ellipse respectively; l is the center distance between adjacent elliptical holes on the web plate to be produced;
2) Respectively determining a parallel line which is a distance b/2 from the center line on two sides of the center line on the web plate of the I-beam, and recording the parallel line as a boundary line;
3) Marking the centers of the lofting ellipses on two boundary lines respectively, wherein the distance between adjacent centers on the same boundary line is L, and the distance between adjacent centers on different boundary lines and the direction parallel to the center line is L/2;
4) Drawing a semi-elliptic curve corresponding to each center, wherein the semi-elliptic curves of the centers on different boundary lines are intersected pairwise, and connecting intersection points of connecting lines of adjacent intersection points and the boundary lines in parallel to obtain two line segment groups which are respectively parallel to the two boundary lines and are positioned on the same side of the central line;
5) Selecting any one of the boundary lines, forming a cutting line by a semi-elliptical curve with the center on the boundary line and a line segment group which is parallel to and on the same side as the boundary line, and cutting the I-beam web along the cutting line to obtain a concave hole part containing a semi-elliptical recess and a flange part containing a semi-elliptical protrusion;
6) Trimming the flange part along a trimming line consisting of a semi-elliptical curve with the center on the other boundary line and a line segment group which is parallel to the boundary line and is on the same side with the semi-elliptical curve to obtain a concave hole part containing semi-elliptical depressions;
7) And (4) welding the concave hole parts obtained in the steps (5) and (6) according to the mode that the semi-elliptical holes are opposite and the line segment groups are opposite to obtain the similar elliptical hole honeycomb beam web.
Among them, when selecting the i-beam, the following factors should be considered:
the height of the i-beam (i.e. the distance between the flanges of the i-beam) should be greater than the minor semi-axis length of the lofting ellipse of the elliptical hole-like shape.
The method can continuously weld concave hole parts obtained by cutting and trimming a plurality of I-shaped beams, and improves the processing speed.
Compared with the prior art, the invention has the following advantages:
the method greatly improves the production efficiency of the quasi-elliptical hole honeycomb beam web plate, particularly has less waste materials generated by punching, saves steel materials and reduces the production cost.
Description of the drawings
FIG. 1 is a schematic illustration of various markings on an embodiment of a split front I-beam;
FIG. 2 is a schematic view of an I-beam of an embodiment after cutting;
FIG. 3 is a schematic view of a flange portion and a trim line obtained by cutting in the example;
FIG. 4 is a schematic view of a notched portion obtained in step 6 of the example;
figure 5 is a schematic view of a web obtained after cross-phase welding.
(V) specific embodiment:
the technical solution of the present invention is described below by using specific examples, but the scope of the present invention is not limited thereto:
to produce the elliptical hole-like honeycomb beam, the length of a long half shaft a 'of an elliptical hole-like opening on a web is 400mm, the length of a short half shaft b' is 300mm, and the center-to-center distance L between adjacent elliptical holes is 1000mm.
The preparation method of the elliptical hole-like honeycomb beam web plate is carried out according to the following steps: 1) Determining the lengths of the major and minor semi-axes a and b of the lofting ellipse according to the formulas (1) and (2) respectively as follows: a =400.2mm, b =309.8mm;
2) Respectively determining parallel lines with a distance of b/2 from the center line at two sides of the center line on the web plate of the I-beam, and respectively marking as boundary lines 1 and 2;
3) Marking the centers of the lofting ellipses on two boundary lines respectively, wherein the distance between adjacent centers on the same boundary line is 1000mm, and the distance between adjacent centers on different boundary lines and the direction parallel to the central line is 500mm;
4) Drawing a semi-elliptic curve corresponding to each center, wherein the semi-elliptic curves of the centers on different boundary lines are intersected pairwise, connecting intersection points of connecting lines of adjacent intersection points, which are parallel to the boundary lines, to obtain two groups of line segments which are respectively parallel to the two boundary lines 1 and 2 and are positioned on the same side of the central line, wherein the group of line segments which are parallel to the boundary line 1 and are positioned on the same side of the central line is marked as a line segment group 1, the group of line segments which are parallel to the boundary line 2 and are positioned on the same side of the central line is marked as a line segment group 2, and various marks are shown in figure 1;
5) Selecting any one of the boundary lines, taking the boundary line 1 as an example, forming a cutting line by a semi-elliptical curve and a line segment group 1 with the center on the boundary line, and cutting the I-beam web along the cutting line to obtain a concave hole part containing a semi-elliptical recess and a flange part containing a semi-elliptical protrusion, as shown in fig. 2;
6) The flange portion is provided with marks of a semi-elliptic curve and a line segment group 2 centered on the boundary line 2, and the flange portion is trimmed along a trimming line (shown in fig. 3) formed by the marks to obtain a notch hole portion having a semi-elliptic depression, as shown in fig. 4;
7) And (4) welding, namely carrying out staggered welding on the concave hole parts respectively obtained in the steps (5) and (6) in a mode that the semi-elliptical depressions are opposite and the line segment groups are opposite to obtain the elliptical hole-like honeycomb beam web plate, as shown in figure 5.
Claims (1)
1. A preparation method of an ellipse-like hole honeycomb beam web plate is characterized in that the method comprises the following steps:
1) Determining the length of the ellipse where the elliptical arc line is located, namely the major and minor semi-axes of the lofting ellipse according to the size of the elliptical hole to be opened, wherein the formula is as follows:
wherein, a 'is the length of the major semi-axis of the ellipse-like hole, and b' is the length of the minor semi-axis of the ellipse-like hole; a. b is the length of the long half shaft and the short half shaft of the lofting ellipse respectively; l is the center distance between adjacent elliptical holes on the web plate to be produced;
2) Respectively determining a parallel line which is a distance b/2 from the center line on two sides of the center line on the web plate of the I-beam, and recording the parallel line as a boundary line;
3) Marking the centers of the lofting ellipses on two boundary lines respectively, wherein the distance between adjacent centers on the same boundary line is L, and the distance between adjacent centers on different boundary lines and the direction parallel to the center line is L/2;
4) Drawing a semi-elliptic curve corresponding to each center, wherein the semi-elliptic curves of the centers on different boundary lines are intersected pairwise, and connecting intersection points of connecting lines of adjacent intersection points and the boundary lines in parallel to obtain two line segment groups which are respectively parallel to the two boundary lines and are positioned on the same side of the central line;
5) Selecting any one of the boundary lines, forming a cutting line by a semi-elliptical curve with the center on the boundary line and a line segment group which is parallel to and on the same side as the boundary line, and cutting the I-beam web along the cutting line to obtain a concave hole part containing a semi-elliptical recess and a flange part containing a semi-elliptical protrusion;
6) Trimming the flange part along a trimming line consisting of a semi-elliptical curve with the center on the other boundary line and a line segment group which is parallel to the boundary line and is on the same side with the semi-elliptical curve to obtain a concave hole part containing semi-elliptical depressions;
7) And (4) welding the concave hole parts respectively obtained in the steps (5) and (6) according to the mode that the semi-elliptical depressions are opposite and the line segment groups are opposite, and obtaining the similar elliptical hole honeycomb beam web.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100549146A CN101105065A (en) | 2007-08-08 | 2007-08-08 | Method for preparing ellipse-like hole honeycomb web plate |
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| CNA2007100549146A CN101105065A (en) | 2007-08-08 | 2007-08-08 | Method for preparing ellipse-like hole honeycomb web plate |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628265A (en) * | 2012-04-24 | 2012-08-08 | 天津二十冶建设有限公司 | Latticed steel sheet pile used in foundation pit support and manufacturing method for the same |
| CN102648322A (en) * | 2009-10-01 | 2012-08-22 | 普罗泰科特工厂弗洛伦兹迈施有限两合公司 | Profile element and method for manufacturing a profile element |
| CN102704619A (en) * | 2012-06-13 | 2012-10-03 | 江苏建筑职业技术学院 | Manufacture method of regular hexagon castellated beam |
| CN102704620A (en) * | 2012-06-28 | 2012-10-03 | 山东大学 | Solid-web H-shaped honeycomb steel beam for polygonal hole |
| CN106193449A (en) * | 2016-07-20 | 2016-12-07 | 沈阳建筑大学 | A kind of preparation method of variable cross-section Honeycomb Beam web |
| CN106383979A (en) * | 2016-11-25 | 2017-02-08 | 天津中际装备制造有限公司 | Concentric oval hole forming method of multilayer overlapping different-curvature circular arc web plate |
| CN107012984A (en) * | 2017-04-11 | 2017-08-04 | 山东大学 | A kind of bolted honeycomb H girder steels and preparation method |
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2007
- 2007-08-08 CN CNA2007100549146A patent/CN101105065A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102648322A (en) * | 2009-10-01 | 2012-08-22 | 普罗泰科特工厂弗洛伦兹迈施有限两合公司 | Profile element and method for manufacturing a profile element |
| CN102628265A (en) * | 2012-04-24 | 2012-08-08 | 天津二十冶建设有限公司 | Latticed steel sheet pile used in foundation pit support and manufacturing method for the same |
| CN102704619A (en) * | 2012-06-13 | 2012-10-03 | 江苏建筑职业技术学院 | Manufacture method of regular hexagon castellated beam |
| CN102704620A (en) * | 2012-06-28 | 2012-10-03 | 山东大学 | Solid-web H-shaped honeycomb steel beam for polygonal hole |
| CN102704620B (en) * | 2012-06-28 | 2015-04-08 | 山东大学 | Solid-web H-shaped honeycomb steel beam for polygonal hole |
| CN106193449A (en) * | 2016-07-20 | 2016-12-07 | 沈阳建筑大学 | A kind of preparation method of variable cross-section Honeycomb Beam web |
| CN106383979A (en) * | 2016-11-25 | 2017-02-08 | 天津中际装备制造有限公司 | Concentric oval hole forming method of multilayer overlapping different-curvature circular arc web plate |
| CN106383979B (en) * | 2016-11-25 | 2019-08-09 | 天津中际装备制造有限公司 | The concentration ellipse hole boring method of the different curvature circular arc web of multiple-layer stacked |
| CN107012984A (en) * | 2017-04-11 | 2017-08-04 | 山东大学 | A kind of bolted honeycomb H girder steels and preparation method |
| CN107012984B (en) * | 2017-04-11 | 2024-02-02 | 山东大学 | Bolt connected honeycomb H-shaped steel beam and manufacturing method thereof |
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