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Process for producing screw-thread steel by draw-milling

A production process, the technology of spiral ribs, applied in the field of production process of spiral rib steel bars by rolling method, can solve the problems of affecting the working conditions of operators, the large internal stress of spiral rib steel bars, and the difficulty in ensuring product quality, so as to avoid acid Washing process, reduce mold loss and improve service life

Inactive Publication Date: 2005-12-28
吴英剑
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  • Summary
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AI Technical Summary

Problems solved by technology

[0006] (1) Due to the use of wire drawing dies to reduce the diameter, sizing and rib drawing, the forming resistance is very large, which not only limits the wire drawing speed, but also reduces the production efficiency; it will also cause a large internal stress on the spiral spiral rib steel bar, and even cause Break the steel bar, making it difficult to guarantee the quality of the product;
[0007] (2) After the wire rod is descaled by rollers, it is impossible to completely remove the oxide skin on the surface. During the subsequent cold drawing process into the fixed wire drawing die, the hard oxide skin debris is easy to wear during the sliding friction process. Drawing die; it is easy to embed in the steel matrix and affect the quality of the product
However, the use of pickling tanks to remove scale will bring serious environmental pollution and greatly affect the working conditions of operators.

Method used

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  • Process for producing screw-thread steel by draw-milling
  • Process for producing screw-thread steel by draw-milling
  • Process for producing screw-thread steel by draw-milling

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The process and device of the present invention are used to produce WCD-H cold-rolled spiral steel bars (ie, female threaded steel bars) with a diameter of 10 mm.

[0033] The Q235 hot-rolled circular wire rod 2 of Φ14mm is used as the raw material, the wire rod is placed on the pay-off frame 1, and the head of the wire rod is introduced into the rolling multi-roller descaling device 3. The descaling device in this embodiment is designed as three Roller group, the first group of rollers has 5 upper and lower rollers, namely 2 upper rollers and 3 lower rollers; the second group of rollers has 7 left and right rollers, namely left 3 and right 4; the third group of rollers has 3 rollers Up and down rollers, namely up 2 down 1. The wire rod passes through the impact and friction on the surface of the rollers, and moves forward in a serpentine shape, that is, the kink motion between the rollers can peel off the surface oxide scale. .

[0034] The wire rod with the surface ...

Embodiment 2

[0037] The WLR-H cold drawn spiral rib steel wire of Φ6mm is produced by the process and device of the present invention.

[0038] Using Φ10mm grade 82MnA hot-rolled wire rod 2 as the raw material, the wire rod is placed on the pay-off frame 1, and its head is introduced into the rolling multi-roller descaling device 3. The descaling device in this embodiment is designed with two sets of rollers. The first set of rollers has 7 upper and lower rollers, namely 3 upper and 4 lower rollers; the second set of rollers has 5 left and right rollers, namely left 3 and right 2. Through the impact and friction on the surface of the rollers, and the twisting movement between the rollers up and down, left and right, the oxide skin on the surface of the wire rod can be peeled off cleanly, and the peeled oxide skin is immediately washed away by the lubricating liquid sprayed by the nozzle 14. .

[0039] The descaled wire rod then enters the Y-type three-roller 4 for rolling reduction. Y-ty...

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Abstract

A technology for manufacturing the reinforcing bar with spiral ribs by rolling-drawing method includes such steps as paying-off removing oxidized surface by multiple rolling rollers, reducing diameter by Y-type three-roller rolling-drawing unit, forming ribs by dual-die spiral rib forming unit, and taking-up. It features use of a cooling-lubricating system.

Description

technical field [0001] The invention belongs to the technical field of metal rolling methods for rolling wire rods or similar small-section materials in a continuous process, and provides a new process for producing spiral rib steel bars by rolling and drawing. Background technique [0002] Spiral rib rebar, commonly known as female threaded rebar, is a high-strength rebar that is widely used in high-rise buildings, ports, bridges, highways and airports. For the iron and steel industry, it is a deep-processed product with high added value and high efficiency, so the improvement of its production process has always been paid attention to by relevant manufacturers and technicians. [0003] The existing production process of the spiral rib steel bar includes the processes of pay-off, descaling, cold drawing and take-up. After the surface is oxidized, it enters the lubricating device with dry powder lubricant; and then through the wire drawing machine, the wire drawing die carr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P13/00
Inventor 吴英剑王恩英朱为昌陈忠恩
Owner 吴英剑
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