Steel used for non-cold-working connection

A technology of cold working and steel billet, which is applied in the direction of connecting components, threaded fasteners, screws, etc., which can solve the problems of difficult threaded connections, reduced cross-sectional area of ​​turning parts, bottlenecks in the overall performance of rebar, etc., and achieves stable self-locking performance Reliable, small thread pitch, and the effect of avoiding metal fiber breakage

A technology of cold working and steel billet, which is applied in the direction of connecting components, threaded fasteners, screws, etc., which can solve the problems of difficult threaded connections, reduced cross-sectional area of ​​turning parts, bottlenecks in the overall performance of rebar, etc., and achieves stable self-locking performance Reliable, small thread pitch, and the effect of avoiding metal fiber breakage

CN102352884AActive Publication Date: 2012-02-15山东焱鑫矿用材料加工有限公司
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  • Steel used for non-cold-working connection
  • Steel used for non-cold-working connection
  • Steel used for non-cold-working connection

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Embodiment Construction

[0024] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0025] like figure 1 As shown, the transverse rib on the rod body of the steel cleaning rod for non-cold working connection of the present invention forms a helix on the same helical surface, and any position of the rod body can be screwed with a matching nut without secondary cold working.

[0026] like figure 2 It shows the thread structure of the steel for non-cold working connection of the present invention, wherein L is the thread pitch, L=4±2mm; preferably, the thread pitch L is 3mm, 4mm, 5mm, 6mm.

[0027] like image 3 It shows the cross-section of the steel for non-cold working connection of the present invention, wherein H is the thread height, 1.0mm≤H≤1.7mm; preferably, the thread height H is 1.0mm, 1.2mm, 1.4mm, 1.5mm.

[0028] like Figure 4 It shows the longitudinal section of the steel for non-cold working connection of the present inve...

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Abstract

The invention discloses steel used for a non-cold-working connection, and the steel has the characteristics of small screw pitch, small lead angle and high thread height; and the steel is matched with a fastening constructional element so as to be convenient to be reliably anchored with an end part, thereby solving the problems that the existing steel bar end is difficult to connect and anchor. The steel not only maintains the advantages of a hot rolling product that the tenacity is good, the intensity is high and the production efficiency is high, thereby avoiding the defects that the performance of a secondary cold working product is decreased, the secondary cold working product is brittle and easy to break, a threaded section is short and the processing cost is high; and meanwhile, thesteel has the advantages that the steel is closely matched with the fastening constructional element, and the product self-locking performance is good, the resource waste is effectively avoided in use, thereby saving the used steel quantity.

Description

technical field [0001] The invention relates to geotechnical anchoring and construction engineering technology, in particular to a steel for non-cold working connection. Background technique [0002] In social infrastructure construction, construction projects such as roads, railways, bridges, tunnels, mines, dams, etc. are inseparable from steel, among which various bar steels are indispensable in these infrastructure constructions. Taking mine engineering as an example, the mine roadway is located in a certain geological environment, and the underground rock mass forms various structural surfaces during the long and complex geological movement, which is easy to crack, especially in the middle and late stages of engineering excavation, due to the load change near the working face The redistribution of the stress field is caused, and the structural plane or weak part in the rock mass is moved by the stress, and the small creep evolves into the macroscopic fracture of the roc...

Claims

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Application Information

Patent Timeline
15 Feb 2012
Publication
CN102352884A
IPC
F16B35/00
Inventors
张德平; 程增仁