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Hot-rolled J-type steel and application of hot-rolled J-type steel

A technology of section steel and wing plate, applied in the direction of lifting device, etc., can solve the problems of difficult control of dimensional accuracy and shape, difficult roll processing, increased roll consumption, etc., and achieve the effect of simplifying equipment, reducing weight and improving efficiency.

Active Publication Date: 2014-03-26
LAIWU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structural rigidity of the section steel is increased, and the bearing capacity of the door frame is improved. Since the section steel is provided with protruding flanges parallel to the sides on the outer bottom surface of the channel steel and the side near the side, it needs to be placed in the hot rolling production process. The middle part of the roll is re-grooved, and the dimensional accuracy and shape are difficult to control. In order to ensure the grooving accuracy, not only will the consumption of the roll be increased, but also the processing of the roll is difficult and the investment cost is high

Method used

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  • Hot-rolled J-type steel and application of hot-rolled J-type steel

Examples

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Effect test

Embodiment 1

[0032] A hot-rolled J-shaped steel with a structure such as figure 1 Shown, comprise web 4, wing plate, wing plate comprises first wing plate 1, second wing plate 2 and the 3rd wing plate 3, the two ends of web plate 4 are connected with first wing plate 1 and the 3rd wing plate respectively 3 connected, the first wing 1 and the third wing 3 are located on the same side of the web 4, the first wing 1 and the third wing 3 are parallel to each other and are perpendicular to the web 4, the second wing 2 and the second One wing 1 is connected to the end of the web 4 , and the second wing 2 is on the same vertical plane as the first wing 1 and also perpendicular to the web 4 . The connection between the inner side 12 of the third wing plate and the bottom side 7 of the web is a smooth curve transition, the connection between the outer side 13 of the third wing plate and the upper side 6 of the web is a smooth curve transition, and the inner side 10 of the second wing plate and The c...

Embodiment 2

[0037] A kind of hot-rolled J section steel, structure is the same as embodiment 1, difference is:

[0038] The shape and height of the second wing plate 2 and the third wing plate 3 are the same. The cross sections of the second wing plate 2 and the third wing plate 3 are both rectangular, and the four corners of the rectangle are rounded. The ratio of the thickness of the first wing plate 1 to the thickness of the web 4 is 1:1, and the second wing plate The ratio of the thickness of 2 to the thickness of the web 4 is 1.2:1, the ratio of the thickness of the third wing 3 to the thickness of the web 4 is 1.3:1, and the ratio of the height of the first wing 1 to the length of the web 4 is 1 :3, the height of the second wing plate 2 and the length ratio of the web 4 are 1:2.5, and the height of the third wing plate 3 and the length ratio of the web 4 are 1:2.5.

Embodiment 3

[0040] A kind of hot-rolled J section steel, structure is the same as embodiment 1, difference is:

[0041] The shape, thickness and height of the first wing plate 1 , the second wing plate 2 and the third wing plate 3 are the same. The cross sections of the first wing plate 1, the second wing plate 2, and the third wing plate 3 are all rectangular, the four corners of the rectangle are rounded, and the ratio of the thickness of the first wing plate 1 to the thickness of the web 4 is 1: 1. The ratio of the thickness of the second wing 2 to the thickness of the web 4 is 1:1, the ratio of the thickness of the third wing 3 to the thickness of the web 4 is 1:1, the height of the first wing 1 and the web The length ratio of 4 is 1:2.5, the ratio of the height of the second flange 2 to the length of the web 4 is 1:2.5, and the ratio of the height of the third flange 3 to the length of the web 4 is 1:2.5.

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Abstract

The invention relates to hot-rolled J-type steel which comprises a web plate and wing plates. The wing plates include the first wing plate, the second wing plate and the third wing plate. The two ends of the web plate are connected with the first wing plate and the third wing plate respectively, the first wing plate and the third wing plate are located on the same side of the web plate, are mutually parallel and are perpendicular to the web plate, the second wing plate is connected with the first wing plate and connected with the end portion of the web plate, and the second wing plate and the first wing plate are located on the same vertical plane and also perpendicular to the web plate. The hot-rolled J-type steel is used for manufacturing forklift portals, in the hot-rolling production process, a groove is not required to be formed in a finish-rolling plain roller, the first wing plate and the second wing plate are located on the same vertical plane, and therefore the size, the position and the appearance of the formed groove are easily controlled; compared with existing hot-rolled J-type steel, the hot-rolling production difficulty is reduced, a hot-rolling technical device is simplified, the investment cost is reduced, the hot-rolling production efficiency is greatly improved, the rigidity of a formed-steel structure is improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to a special-shaped steel, in particular to a hot-rolled J-shaped steel, which belongs to the technical field of hot-rolled shaped steel. Background technique [0002] As an industrial transport vehicle, forklift trucks are mainly composed of inner and outer portal frames. When the portal frame is carrying out forklifting and lifting operations, the front axle is the center of gravity to generate a large overturning moment. Therefore, the forklift portal frame is the The most important force-bearing member in the work, the forklift mast section steel is cut and welded by the plate, and the welded section steel is welded by the wing plate and the web. Since the forklift lifting system needs to bear large and periodic loads during use, it has high requirements on the strength, cross-sectional size, shape straightness, flatness, etc. of the section steel. Therefore, the existing forklift mast section steel in the welding process The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66F9/08
Inventor 付常伟赵新华袁鹏举纪进立霍喜伟
Owner LAIWU IRON & STEEL GRP
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