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Hot-rolled high-precision full-thread reinforcing steel bar for building

A full-thread, high-precision technology, used in buildings, building components, building reinforcements, etc., can solve problems such as poor connection strength, poor mechanical properties, and low precision, and achieve the effects of reducing production costs, easy processing, and improving quality.

Inactive Publication Date: 2016-08-10
SHANDONG IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a hot-rolled high-precision fully threaded steel bar for construction in order to solve the defects of poor connection strength, poor mechanical properties and low precision in the connection mode of the existing ribbed steel bar. The steel bars include: a rod body and a transverse rib; the transverse ribs are evenly distributed along the length direction of the rod body, and the transverse ribs are divided into upper and lower spiral transverse ribs of equal height, that is, upper transverse ribs and lower transverse ribs; And the two constitute threads on the same helical line; a free expansion surface is distributed between the upper transverse rib and the lower transverse rib; and the free expansion surface is a straight rectangular surface; Use hollow nuts or sleeves with internal threads for connection

Method used

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  • Hot-rolled high-precision full-thread reinforcing steel bar for building
  • Hot-rolled high-precision full-thread reinforcing steel bar for building
  • Hot-rolled high-precision full-thread reinforcing steel bar for building

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, the fully threaded steel bar is a 500Mpa steel bar, and the transverse rib 2 is a unidirectional left-handed spiral. The root chamfer r1 of the transverse rib 2 is 0.9mm, and the top chamfer r2 is 0.4m.

[0025] The distance d between the transverse ribs 2 is 10mm.

[0026] Such as Figure 4 As shown, the height h of the transverse rib 2 is 1.5 mm and the bottom width b is 5.6 mm.

[0027] Such as Figure 4 As shown, the angle α between the side of the transverse rib 2 and the outer circumferential surface of the rod body 1 is 60°; as figure 1 As shown, the angle β between the transverse rib 2 and the axis of the rod body 1 is 81.8°.

[0028] Such as image 3 As shown, the distance d between the free expansion surfaces of the fully threaded steel bars is 19.0 mm.

[0029] Such as image 3 As shown, the diameter dh of the rod body 1 is Φ20.

[0030] Such as image 3 and 4 As shown, the section of the transverse rib 2 is an isosceles ...

Embodiment 2

[0032] figure 2 As shown, the fully threaded steel bars are 500Mpa grade steel bars, and the equal-height spiral transverse ribs are unidirectional right-handed spirals. The root chamfer r1 of the transverse rib 2 is 1.5 mm, and the top chamfer r2 is 0.5 mm.

[0033] The distance d between the transverse ribs 2 is 6.0mm.

[0034] Such as Figure 4 As shown, the height h of the transverse rib 2 is 1.0 mm and the bottom width b is 4.0 mm.

[0035] Such as Figure 4 As shown, the angle α between the side of the transverse rib 2 and the outer circumferential surface of the rod body 1 is 45°; as figure 2 As shown, the angle β between the transverse rib 2 and the axis of the rod body 1 is 85.9°.

[0036] Such as image 3 As shown, the distance d between the free expansion surfaces of the fully threaded steel bars is 23.4 mm.

[0037] Such as image 3 As shown, the diameter dh of the rod body 1 is Φ25.

[0038] Such as image 3 and 4 As shown, the section of the transver...

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Abstract

The invention provides a hot-rolled high-precision fully threaded steel bar for construction. The fully threaded steel bar includes: a rod body (1) and a transverse rib (2); ribs (2), the transverse ribs (2) are divided into upper and lower spiral transverse ribs of equal height, i.e. upper transverse ribs (4) and lower transverse ribs (5); and the two constitute threads on the same helical line ; A free expansion surface (3) is distributed between the upper transverse rib (4) and the lower transverse rib (5); and the free expansion surface (3) is a straight rectangular surface.

Description

technical field [0001] The invention relates to the technical field of steel bars for construction, in particular to a hot-rolled high-precision fully threaded steel bar for construction. Background technique [0002] The commonly used rebar in my country is the steel bar with ribs on the surface, that is, hot-rolled ribbed steel bar. It is a necessary steel for medium-sized and above building components, and is widely used in housing construction, roads, railways and other public facilities. At present, commonly used ribbed steel bars include: two longitudinal ribs and transverse ribs uniformly distributed along the length direction. The shape of the transverse rib is divided into three types: spiral, herringbone and crescent. [0003] Currently, in order to meet construction needs, multiple ribbed steel bars need to be connected together to meet construction standards. At present, the commonly used connection methods include: binding lap connection, welding connection an...

Claims

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Application Information

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IPC IPC(8): E04C5/02E04C5/16
CPCE04C5/02E04C5/162
Inventor 王中学马荣全孙庆亮苗冬梅李雪峰葛杰王淑华梁辉刘艳林徐尚富
Owner SHANDONG IRON & STEEL CO LTD
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