Novel four-side-rib high-ductility cold-rolled ribbed steel bar

Abstract

The utility model discloses a novel four-side rib high-ductility cold-rolled ribbed steel bar, which relates to the field of steel bars and comprises a steel bar main body, four longitudinal ribs are equidistantly arranged on the outer circumference of the steel bar main body, the longitudinal ribs extend along the axial direction, two rows of inclined transverse ribs are symmetrically arranged on the outer circumference of the steel bar main body, and the inclined directions of the two rows of transverse ribs are opposite. The transverse ribs in the same row are parallel to each other, the two rows of transverse ribs are respectively separated by a longitudinal rib, the longitudinal ribs are arranged at the midpoints of the transverse ribs, and the height of the longitudinal ribs is the same as that of the midpoints of the transverse ribs; a series of parameters such as the base circle diameter of the four-side-rib high-ductility cold-rolled ribbed steel bar with the diameter phi of 6-12 mm, the height of the middle point of a transverse rib, the included angle between the transverse rib and the axis of the steel bar, the top width of the transverse rib, the included angle between the side face of the transverse rib and the surface of the steel bar, the distance between the transverse ribs and the like are optimized and adjusted by adopting parameters of a traditional two-side-rib cold-rolled ribbed steel bar. And on the premise of meeting related standards, the processing difficulty and the production cost of the four-side rib steel bar are reduced, and the strength and the extension performance of the four-side rib steel bar are improved.

Description

Technical Field

[0001] The utility model relates to the field of steel bars, in particular to a novel cold-rolled ribbed steel bar with four ribs and high ductility. Background Art

[0002] Four-sided high-ductility cold-rolled ribbed steel bars are a new type of steel bar. Their bonding strength with concrete and crack resistance are more than twice that of ordinary two-sided ribbed steel bars. They have broader application prospects and higher added value. At present, research on high-ductility cold-rolled ribbed steel bars in my country is mostly focused on two-sided rib and three-sided rib steel bars. When producing four-sided rib steel bars according to the parameter requirements in "Welded Mesh for Ballastless Track Q / CR 955-2023" issued by China State Railway Group Co., Ltd., there are problems such as complicated hole design, difficult processing of finished rollers, and high processing costs. Utility Model Content

[0003] The purpose of the utility model is to provide a new type of four-sided rib high-ductility cold-rolled ribbed steel bar. On the basis of the size parameters of traditional two-sided rib cold-rolled ribbed steel bars, four-sided rib high-ductility cold-rolled ribbed steel bars that meet the standard of "Welded Mesh for Ballastless Track Q / CR 955-2023" are produced to solve the problems mentioned in the above background technology.

[0004] A novel four-sided high-ductility cold-rolled ribbed steel bar comprises a steel bar body, wherein four longitudinal ribs are equidistantly arranged on the outer circumference of the steel bar body, and the longitudinal ribs extend along the axial direction; the outer circumference of the steel bar body is also symmetrically provided with two rows of inclined transverse ribs, and the inclination directions of the two rows of transverse ribs are opposite, and the transverse ribs in the same row are parallel to each other, the two rows of transverse ribs are respectively separated by a longitudinal rib, and the longitudinal ribs are arranged at the midpoint of the transverse ribs, and the height of the longitudinal ribs is the same as the height of the midpoint of the transverse ribs.

[0005] Preferably, the base circle diameter of the steel bar body = nominal diameter - (0.2-0.6) mm;

[0006] The angle between the transverse rib and the steel bar axis is 45° to 70°;

[0007] The width of the top of the transverse rib is 1-1.5 mm;

[0008] The transverse rib angle is 45°-70°;

[0009] Transverse rib spacing = (0.9~1.1) standard value mm.

[0010] Preferably, the standard value is the standard value of the two-sided ribbed steel bar size parameter in "Cold-rolled ribbed steel bars 13788-2017".

[0011] Preferably, the roots of the longitudinal ribs and the transverse ribs and the surface of the steel bars are provided with rounded corners, and the radius of the rounded corners is 0.45-0.8 mm.

[0012] The advantages of the utility model are:

[0013] The parameters of traditional two-sided ribbed cold-rolled ribbed steel bars are used to optimize and adjust a series of parameters such as the base circle diameter, transverse rib midpoint height, angle between transverse rib and steel bar axis, transverse rib top width, angle between the side of transverse rib and steel bar surface, and transverse rib spacing of Φ6-12mm four-sided rib high ductility cold-rolled ribbed steel bars. Under the premise of ensuring that it meets the relevant standards, the processing difficulty and production cost of four-sided ribbed steel bars are reduced, and the strength and elongation performance of four-sided ribbed steel bars are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a new type of four-sided high-ductility cold-rolled ribbed steel bar structure;

[0015] Figure 2 for Figure 1 Structural schematic diagram of the cross section of the transverse rib at A in the middle;

[0016] Figure 3 This is a schematic diagram of the steel bar groove hole type;

[0017] Figure 4 This is the standard value table of dimension parameters of two-sided ribbed steel bars in "Cold-rolled ribbed steel bars 13788-2017".

[0018] In the figure: 1. Base circle diameter; 2. Height of midpoint of transverse rib; 3. Angle between transverse rib and steel bar axis; 4. Top width of transverse rib; 5. Bevel angle of transverse rib; 6. Spacing between transverse ribs; 7. Longitudinal ribs; 8. Chamfered corners. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0020] like Figures 1 to 3 As shown, a novel four-sided high-ductility cold-rolled ribbed steel bar comprises a steel bar body, four longitudinal ribs 7 are equidistantly arranged on the outer circumference of the steel bar body, the longitudinal ribs 7 extend along the axial direction, and two rows of inclined transverse ribs are symmetrically arranged on the outer circumference of the steel bar body, and the inclination directions of the two rows of transverse ribs are opposite to each other, so as to improve the bonding strength with concrete, and the transverse ribs in the same row are parallel to each other, and the two rows of transverse ribs are respectively separated by a longitudinal rib 7, and the longitudinal rib 7 is arranged at the midpoint of the transverse ribs, and the height of the longitudinal rib 7 is the same as the height 2 of the midpoint of the transverse ribs.

[0021] In this embodiment, if Figure 3 As shown, the base circle diameter 1 of the steel bar body = nominal diameter - (0.2 to 0.6) mm;

[0022] like Figures 1 to 2As shown, the included angle 3 between the transverse rib and the steel bar axis is 45° to 70°;

[0023] The transverse rib top width 4 is 1-1.5 mm; the transverse rib top width 4 is the width of the top of the transverse rib.

[0024] The transverse rib angle 5 is 45°-70°; the transverse rib angle 5 is the angle between the side of the transverse rib and the surface of the steel bar;

[0025] Transverse rib spacing 6 = (0.9 ~ 1.1) standard value mm.

[0026] In this embodiment, if Figure 4 As shown, it is the standard value table of dimension parameters of two-sided ribbed steel bars in the existing "Cold-rolled ribbed steel bars 13788-2017". The standard values ​​of some parameters in the utility model are optimized with reference to this table.

[0027] In this embodiment, the longitudinal ribs 7 and the roots of the transverse ribs and the surface of the steel bars are provided with rounded corners 8, and the radius of the rounded corners 8 is 0.45-0.8 mm.

[0028] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A new type of four-sided high-ductility cold-rolled ribbed steel bar, characterized in that: The invention comprises a steel bar body, wherein four longitudinal ribs (7) are equidistantly arranged on the outer circumference of the steel bar body, wherein the longitudinal ribs (7) extend in the axial direction, and two rows of inclined transverse ribs are symmetrically arranged on the outer circumference of the steel bar body, wherein the inclination directions of the two rows of transverse ribs are opposite, and the transverse ribs in the same row are parallel to each other, and the two rows of transverse ribs are respectively separated by a longitudinal rib (7), and the longitudinal ribs (7) are arranged at the midpoint of the transverse ribs, and the height of the longitudinal ribs (7) is the same as the height (2) of the midpoint of the transverse ribs.

2. The novel four-sided high-ductility cold-rolled ribbed steel bar according to claim 1 is characterized in that: The base circle diameter (1) of the steel bar body is equal to the nominal diameter - (0.2-0.6) mm; the angle (3) between the transverse rib and the steel bar axis is 45°-70°; the transverse rib top width (4) is 1-1.5 mm; the transverse rib oblique angle (5) is 45°-70°; and the transverse rib spacing (6) is equal to (0.9-1.1) standard value mm.

3. The novel four-sided high-ductility cold-rolled ribbed steel bar according to claim 1, characterized in that: The roots of the longitudinal ribs (7) and the transverse ribs and the surface of the steel bars are provided with rounded corners (8), and the radius of the rounded corners (8) is 0.45-0.8 mm.

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