Method for reducing rough rolling wrinkles of rods and wires

A technology of rough rolling of rods and wires, which is applied in the direction of instruments, electrical digital data processing, computer-aided design, etc., can solve the problems of uncertainty, restriction of product quality, time-consuming and labor-consuming, etc., to reduce the damage rate and improve the surface quality , the effect of reducing production costs

Pending Publication Date: 2020-05-15
TANGSHAN DELONG STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual operation, the process parameters are generally adjusted by trial and error, but this is highly dependent on the experience level of the manual, has great uncertainty, and is time-consuming and labor-intensive, which seriously restricts the improvement of product quality.

Method used

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  • Method for reducing rough rolling wrinkles of rods and wires
  • Method for reducing rough rolling wrinkles of rods and wires
  • Method for reducing rough rolling wrinkles of rods and wires

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0048] 1. The test material is welding wire steel ER70S-6, and the compression test is carried out on a Gleeble 3500 thermal simulation testing machine. The specific steps are as follows: first, heat to 1200°C for 3 minutes at a heating rate of 10°C / s to complete austenitization, then at a cooling rate of 10°C / s to the deformation temperature and hold for 1min. The deformation temperatures are 900°C and 1000°C respectively. ℃, 1100℃, 1200℃; the strain rate is 0.01S respectively -1 , 0.1S -1 , 1S -1 , 10S -1 . Therefore, the true stress-true strain curves of the material at different temperatures and strain rates are obtained, and the Johnson-Cook constitutive model is used to fit it, and finally its constitutive parameters are determined, which can be expressed as:

[0049]

[0050] in, is the equivalent strain rate; is the equivalent stress; T is the temperature;

[0051] 2. Use Abaqus / Explicit finite element software to establish a three-dimensional thermal-mecha...

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PUM

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Abstract

The invention relates to a method for reducing rough rolling wrinkles of rods and wires. According to the method, finite element simulation and an actual rolling process are organically combined, a toughness damage criterion is proposed to serve as a wrinkle generation judgment criterion, the wrinkle change trend is analyzed according to the number of damage units, and then wrinkle defects are inhibited by optimizing process parameters such as pass width, pass fillet, friction coefficient and rolling temperature. The method has the advantages of improving the surface quality and the productionefficiency of rolled pieces, reducing the production cost and the like.

Description

technical field [0001] The invention relates to the technical field of plastic processing, in particular to a method for reducing rough rolling wrinkles of rods and wires. Background technique [0002] Bars and wires are produced by hot continuous rolling process and are widely used in machining, construction, home appliances and other industries. The pass system often used in rough rolling is box-box-ellipse-circle-ellipse-circle. In order to improve production efficiency, save roll and rolling energy consumption, some steel mills have improved the pass system, and only changed the pass of the first two rolling mills to flat rolls for rolling. However, it was found that surface wrinkle defects appeared after rough rolling. Today's fierce market competition puts forward higher requirements on the surface quality of rods and wires, so it is necessary to improve the surface quality of rolled products. [0003] Wrinkle is a common surface defect, hidden under the iron oxide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F119/14G06F119/08
Inventor 张治广刘倩翟进坡田亚强陈连生田路宋进英史秉华梁鹏郑小平陈志国李红斌张荣华马劲红
Owner TANGSHAN DELONG STEEL CO LTD
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