CN211839564U - Butterfly type hole structure of front hole of large-specification flat bulb steel finished product - Google Patents
Butterfly type hole structure of front hole of large-specification flat bulb steel finished product Download PDFInfo
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- CN211839564U CN211839564U CN202020266260.4U CN202020266260U CN211839564U CN 211839564 U CN211839564 U CN 211839564U CN 202020266260 U CN202020266260 U CN 202020266260U CN 211839564 U CN211839564 U CN 211839564U
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Abstract
The utility model relates to a butterfly pass structure in big specification flat bulb steel finished product front opening, it includes: a bulb portion; the web part comprises an inclined section, an arc transition section and a horizontal section, the ball head part is connected with the outer end of the inclined section, and an acute angle a is formed between the inclined section and the horizontal plane. Because the ball head part is connected with the outer end of the inclined section, and an acute angle a is formed between the inclined section and the horizontal plane, the grooving depth of the roller is reduced, the strength and the wear resistance of the roller are improved, and the economic benefit is improved.
Description
Technical Field
The utility model belongs to the steel rolling field relates to a butterfly pass structure of big specification flat bulb steel finished product front opening.
Background
The flat bulb steel is structural section steel commonly used in shipbuilding industry, is mainly used for strengthening a ship plate and is equivalent to a human rib. Because the flat-bulb steel has a special shape and is a typical asymmetric section, the rolling difficulty is very high all the time, and only a small number of steel mills can roll and produce the flat-bulb steel in China.
The traditional flat bulb steel production adopts a groove pass system for rolling, a bulb is used as one side of a groove pass, a web plate is bent for one section to form the other side of the groove pass, and when a large scale (larger than 300mm in width) is rolled, because the height of the bulb is larger, the grooving of a roller is deeper, the wear resistance of the roller is poor, the strength of the roller is poor, the roller is easy to break, and huge economic loss is caused. Therefore, a new hole pattern design is needed to solve the production problem of the large-specification flat bulb steel.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a butterfly pass structure in big specification flat bulb steel finished product front opening has improved the intensity and the wearability of roll.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
the utility model provides a butterfly pass structure of big specification flat bulb steel finished product front opening, it includes:
a bulb portion;
the web part comprises an inclined section, an arc transition section and a horizontal section, the ball head part is connected with the outer end of the inclined section, and an acute angle a is formed between the inclined section and the horizontal plane.
Optionally, the acute angle a has a size of 20 ° to 25 °.
Optionally, the inclined section occupies 0.5-0.6 of the total length of the center line of the web part.
Optionally, the circular arc transition section accounts for 0.10-0.15 of the total length of the center line of the web part.
Optionally, the horizontal section occupies 0.30-0.35 of the total length of the center line of the web part.
Optionally, the inclined section is the same thickness as the horizontal section.
Optionally, an outer surface of the ball portion forms an acute angle b with a vertical line.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the utility model discloses a butterfly pass structure in big specification bulb band steel finished product front opening because bulb portion is connected with the outer end of slope section, and forms acute angle an between slope section and the horizontal plane, has consequently reduced the grooving degree of depth of roll to a certain extent to improve the intensity and the wearability of roll, improved economic benefits.
Drawings
Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic structural view of a butterfly hole pattern of a front hole of a large-specification flat bulb steel finished product according to the preferred embodiment of the invention;
FIG. 2 is a parameter map of FIG. 1, i.e., the corresponding parameters are mapped on the basis of FIG. 1;
wherein the reference numerals are as follows:
1. a bulb portion;
2. a web portion; 21. an inclined section; 22. a circular arc transition section; 23. a horizontal segment.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
As shown in figure 1, the butterfly hole type structure of the front hole of the large-size flat bulb steel finished product comprises a ball head part 1 and a web part 2.
Wherein the web portion 2 comprises an inclined section 21, a circular arc transition section 22 and a horizontal section 23. Wherein the ball head portion is connected to the outer end of the inclined section 21.
As shown in fig. 2, the relevant hole pattern parameters include:
angles of butterfly type a1, a2, A3, a 4;
the web width (namely the length of a wire center in the web part in the hole type) of the flat bulb steel is formed by the length L1 of an inclined section, the length L2 of an arc transition section and the length L3 of a horizontal section of the butterfly hole type;
the web thickness of the flat bulb steel is composed of T1 and T2 of butterfly hole type;
the web weld edge slope of the bulb steel S1.
Wherein, A1 is 90 degrees, A2 is 30 degrees, A3 is 20 degrees to 25 degrees, and the angle of A4 is constantly equal to A3.
L1+ L2+ L3 is equal to the preset value of the width of the web of the flat bulb steel (considering the thermal expansion, the width, the tolerance control level and other factors of the red steel), specifically, the center length of L1 is about 0.55 of the nominal width of the web of the flat bulb steel (in other embodiments, any value between 0.5 and 0.6, inclusive), the center arc length of L2 is 0.10 to 0.15 (any value between 0.10 and 0.15, inclusive), and the center length of the horizontal segment L3 is 0.30 to 0.35 (any value between 0.30 and 0.35, inclusive), of 0.30 and 0.35, of the nominal width of the web of the flat bulb steel.
The thickness of T1 is constantly equal to T2.
The S1 value is 6-10%.
A1 is the angle between the outside surface of the bulb portion 1 and the upper surface of the angled section 21 of the web portion 2.
A2 is the angle between the inside surface (on the lower roll) and the outside surface (on the upper roll) of bulb section 1.
A3 is the angle formed between the outside surface of the ball nose portion 1 and the vertical line, and is an acute angle, which may be referred to as an acute angle b.
A4 is the angle formed between the inclined section 21 and the horizontal plane, and is an acute angle, which may be referred to as an acute angle a.
Since a1 is 90 °, the angle of a4 is constantly equal to A3.
Due to the arrangement of the inclined section 21 and the connection of the bulb part 1 and the outer end of the inclined section 21, the grooving depth of the roller is obviously reduced, the strength and the wear resistance of the roller are improved, and the economic benefit is further improved.
Because an acute angle b (namely A3 in figure 2) is formed between the outer side surface of the ball head part 1 and the plumb line, the value of the angle A3 can be any value (including two end points) between 20 and 25 degrees, the contact area of the ball head and the guide and guard device is reduced, and the surface quality of the ball head is improved. The inclination S1 of the welding edge of the horizontal section 23 of the flat-bulb steel web plate is controllable, a straight web plate welding edge is easy to roll, and welding wire consumption is reduced. In addition, the pass adopts a closed structure, and the rolling stability is strong.
The hole pattern scheme is further described in the following by combining the actual design example of the finished front hole of the HP 370X 13 large-size flat bulb steel.
Table 1: finished product front hole size (unit: mm) of HP 370X 13 large-size flat-bulb steel
In this example, a1 is 90 °, a2 is 30 °, A3 is 20 °, and the angle of a4 is equal to A3, i.e. 20 °.
L1+ L2+ L3 is equal to the preset value of the width of the front hole of the finished bulb flat steel web (after considering the factors of thermal expansion, width expansion, tolerance control level and the like of red steel, the preset value is about 371.5 mm), specifically, the center length of L1 is 0.55, namely 203.5mm, the center arc length of L2 is 0.115, namely 42.55mm, and the center length of the horizontal section L3 is 0.34, namely 125.8mm, of the nominal web width of the bulb flat steel. And 8% of S1. The thickness of T1 and T2 is 15mm, the thickness of the finished product is 13mm, the rolling reduction is 2mm, the width coefficient of the finished product is 1.0, the width is about 2mm, the width of the final finished web plate is 373.8mm, and the width after cooling is 369mm (negative tolerance rolling). The rolled flat bulb steel has accurate width, and the product completely meets the requirements of GB/T9945-2012 standard.
To sum up, the utility model discloses a butterfly pass, the beneficial part of production is: 1. the grooving depth of the roller is reduced, the strength and the wear resistance of the roller are improved, and the economical efficiency is better; 2. the bulb part A3 of the flat bulb steel adopts the design of an angle of 20-25 degrees, so that the contact area between the bulb and the guide device is reduced, and the surface quality of the bulb is improved; 3. the inclination of the welding edge of the horizontal section of the flat-bulb steel web is controllable, a straight web welding edge is easy to roll, and the consumption of welding wires is reduced; 4. the pass adopts a closed structure, and the rolling stability is strong.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (7)
1. The utility model provides a butterfly pass structure of big specification bulb band steel finished product front opening which characterized in that, it includes:
a bulb portion (1);
the web part (2), web part (2) are including slope section (21), circular arc changeover portion (22) and horizontal segment (23), bulb portion (1) with the outer end of slope section (21) is connected, form acute angle a between slope section (21) and the horizontal plane.
2. The large format flat bulb steel finished product front hole butterfly hole type structure of claim 1, wherein: the size of the acute angle a is 20-25 degrees.
3. The large format flat bulb steel finished product front hole butterfly hole type structure of claim 1, wherein: the inclined section (21) occupies 0.5-0.6 of the total length of the center line of the web part (2).
4. The large format flat bulb steel finished product front hole butterfly hole type structure of claim 1, wherein: the arc transition section (22) occupies 0.10-0.15 of the total length of the center line of the web part (2).
5. The large format flat bulb steel finished product front hole butterfly hole type structure of claim 1, wherein: the horizontal section (23) occupies 0.30-0.35 of the total length of the center line of the web part (2).
6. The large format flat bulb steel finished product front hole butterfly hole type structure of claim 1, wherein: the inclined section (21) and the horizontal section (23) have the same thickness.
7. The large format flat bulb steel finished product front hole butterfly hole type structure of claim 1, wherein: an acute angle b is formed between the outer side surface of the ball head part (1) and a plumb line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020266260.4U CN211839564U (en) | 2020-03-06 | 2020-03-06 | Butterfly type hole structure of front hole of large-specification flat bulb steel finished product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020266260.4U CN211839564U (en) | 2020-03-06 | 2020-03-06 | Butterfly type hole structure of front hole of large-specification flat bulb steel finished product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211839564U true CN211839564U (en) | 2020-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020266260.4U Active CN211839564U (en) | 2020-03-06 | 2020-03-06 | Butterfly type hole structure of front hole of large-specification flat bulb steel finished product |
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| CN (1) | CN211839564U (en) |
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2020
- 2020-03-06 CN CN202020266260.4U patent/CN211839564U/en active Active
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