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A kind of hot-rolled J-shaped steel and its application

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 processing of rolls, increase of consumption of rolls, etc., and achieve the effect of simplifying equipment, reducing weight and prolonging service life.

Active Publication Date: 2016-08-24
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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  • A kind of hot-rolled J-shaped steel and its application
  • A kind of hot-rolled J-shaped steel and its application
  • A kind of hot-rolled J-shaped steel and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A hot-rolled J-shaped steel with a structure such as figure 1As shown, it includes the web 4 and the wing plate, the wing plate includes the first wing plate 1, the second wing plate 2 and the third wing plate 3, and the two ends of the web plate 4 are respectively connected with the first wing plate 1 and the third wing plate 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 perpendicular to the web 4, the second wing 2 and the third 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 si...

Embodiment 2

[0037] A kind of hot-rolled J-shaped steel, the structure is the same as embodiment 1, the 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 web 3 to the thickness of the web 4 is 1.3:1, and the ratio of the height of the first web 1 to the length of the web 4 is 1 :3, the height ratio of the second wing plate 2 to the length of the web 4 is 1:2.5, the height of the third wing plate 3 to the length ratio of the web 4 is 1:2.5.

Embodiment 3

[0040] A kind of hot-rolled J-shaped steel, the structure is the same as embodiment 1, the 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, and 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 plate 2 to the thickness of the web plate 4 is 1:1, the ratio of the thickness of the third wing plate 3 to the thickness of the web plate 4 is 1:1, the height of the first wing plate 1 and the web plate The length ratio of 4 is 1:2.5, the ratio of the height of the second flange 2 to the length of web 4 is 1:2.5, and the ratio of the height of the third flange 3 to the length of web 4 is 1:2.5.

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Abstract

The invention relates to a hot-rolled J-shaped steel, which includes a web and a wing plate, and the wing plate includes a first wing plate, a second wing plate and a third wing plate, and the two ends of the web plate are connected to the first wing plate respectively. The wing plate is connected to the third wing plate, the first wing plate and the third wing plate are located on the same side of the web, the two wing plates are parallel to each other and are perpendicular to the web plate, the second wing plate is connected to the first wing plate and Connected to the end of the web, the second wing is on the same vertical plane as the first wing and is also perpendicular to the web. The hot-rolled J-shaped steel of the present invention is used in the manufacture of forklift masts. During the hot-rolling production process, there is no need to make grooves on the finish rolling flat rolls, and the first wing plate and the second wing plate are on the same vertical plane. The size, position and shape are easy to control. Compared with the existing hot-rolled J-shaped steel, it reduces the difficulty of hot-rolled production, simplifies hot-rolled technical equipment, reduces investment costs, greatly improves the efficiency of hot-rolled production, and improves the structural stability Rigidity, reducing production costs.

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 Patents(China)
IPC IPC(8): B66F9/08
Inventor 王中学纪进立付常伟袁鹏举刘圣赵新华宋玉卿
Owner LAIWU IRON & STEEL GRP
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