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Cold-rolling triangle helical reinforcing steel bar and the production for the special rolling machine

A technology of spiral steel bars and triangles, which is applied in metal rolling and other directions, can solve the problems of large deformation, low plastic index, and plastic index decline, and achieve the effects of improving anchorage, reducing weight, and saving steel

Inactive Publication Date: 2004-06-02
刘宝珩 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because it undergoes two plastic deformations of flattening and torsion, and the deformation of the flat edge is the largest, its plasticity index δ = ~ 4%, and its performance is unstable [2],
[0006] After cold rolling, the strength of hot-rolled steel increases with the degree of deformation, but its plasticity index decreases.
Existing cold-rolled steel bars have low plasticity index δ% due to excessive deformation

Method used

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  • Cold-rolling triangle helical reinforcing steel bar and the production for the special rolling machine
  • Cold-rolling triangle helical reinforcing steel bar and the production for the special rolling machine
  • Cold-rolling triangle helical reinforcing steel bar and the production for the special rolling machine

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Experimental program
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Embodiment Construction

[0015] (1) Simulate the manufacture of a small model to verify the feasibility - the author of this experiment has completed it and rolled out a small sample.

[0016] (2) Design and manufacture of special rolling mills for experiments, and at the same time contact relevant units to declare scientific research projects and apply for funds.

[0017] The φ10~φ16 steel samples can be rolled on this rolling mill, and after rolling, the shape will be tested by the authoritative organization, and it is required to solve the performance and shape in this stage to meet the requirements of the construction industry. Product performance should be better than market products.

[0018] (3) Cooperate with the construction industry to determine product specifications, production scale and other issues according to market requirements, and carry out small-scale trial production.

[0019] References: [1] Standard Compilation of Iron and Steel Materials for Construction

[0020] ...

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PUM

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Abstract

The present invention provides serial developed cold rolled steel bar product of 10-50 mm diameter provides cold rolled spiral triangular steel bar capable of replacing hot rolled spiral steel bar, and this is significant for building industry. The specially designed rolling machine for producing cold rolled spiral triangular steel bar can complete the plastic deformation of extending and torsion of circular blank in the identical deformation area, and the deformation amount may be controlled to realize the optimal combination of strength and plastic deformation. The plastic index delta may reach 6-8 % to raise the safety of cold rolled steel bar, and the spiral form has higher anchoring strength of combining with concrete.

Description

technical field [0001] The invention relates to a novel cold-rolled steel bar in building steel products. Background technique [0002] After the hot-rolled steel is cold-rolled, its strength is significantly improved. The application of cold-rolled steel bars for this purpose can save steel, and may also reduce the weight and cost of building components. In modern high-rise buildings, highways and bridges, and residential buildings, cold-rolled steel bars are used instead of hot-rolled steel bars. [0003] The application history of cold-rolled steel bars is not long. In foreign countries, Austria and some European countries have used "Tor" steel bars since 1935. It is a hot-rolled round bar with two longitudinal symmetrical ribs on the surface that is cold-torsed to make it Form a helical cold-worked steel bar. The "Drillwulst" steel bar in Germany is made by hot rolling 4 round bars together and then cold twisting them. The French "Caron" steel bar is made of section ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/18
Inventor 刘宝珩
Owner 刘宝珩