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A rolling force energy check calculation method for high-speed hot-rolled bars

A calculation method and technology of rolling force, applied in metal rolling, metal rolling, manufacturing tools, etc., can solve problems such as high rolling speed and failure to meet the calibration of rolling force parameters

Active Publication Date: 2022-02-22
HUATIAN ENG & TECH CORP MCC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high rolling speed of high-speed bars, the maximum final rolling speed can reach 40m / s, and pure theoretical formulas or empirical methods cannot meet the requirements of multi-stand, multi-hole continuous rolling process.

Method used

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  • A rolling force energy check calculation method for high-speed hot-rolled bars
  • A rolling force energy check calculation method for high-speed hot-rolled bars
  • A rolling force energy check calculation method for high-speed hot-rolled bars

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] Taking a high-speed bar factory as an example to calculate the production of two-cut Φ10mm threaded steel bars. The plant has a total of 6 roughing mills, 6 intermediate rolling mills, 6 pre-finishing mills, 2 top-crossing 45° double-module rolling mills and 2 reducing mills. The calculation process is shown in the following three tables, where the red numbers are known data. From the calculation results of rolling mill force and energy in Table 3, it can be seen that the 24 rolling mills and motor power equipped in this factory can fully meet the production of two-segmented Φ10mm threaded steel bars.

[0121] Table 1 Basic parameter calculation table

[0122] Billet weight (kg): 2499 Specifications: Φ10mm×2 Final rolling speed (m / s): 40 Steel type: 20Mnsi

[0123]

[0124] Table 2 Calculation table of temperature of rolled piece in each pass

[0125] rack number Rack spacing E travel time t Rolled piece surface area F s

The initial temperatu...

Embodiment 2

[0129] Further, take the high-speed bar plant's two-cut Φ12mm rebar rolling production as an example to calculate. Similarly, the calculation process is shown in the following three tables, where the red numbers are known data. From the results of rolling mill force calculation Table 3, it can be seen that the 24 rolling mills and motor power equipped in this factory can fully meet the production of two-splitting Φ12mm threaded steel bars.

[0130] Table 1 Basic parameter calculation table

[0131] Billet weight (kg): 2499 Specifications: Φ12mm×2 Final rolling speed (m / s): 36.1 Steel type: 20Mnsi

[0132]

[0133] Table 2 Calculation table of temperature of rolled piece in each pass

[0134] rack number Rack spacing E travel time t Rolled piece surface area F s

The initial temperature Roll cooling water temperature drop ΔT w

Radiation temperature drop ΔT f

Convective temperature drop ΔT d

Pass deformation temperature rise ΔT b

...

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Abstract

The invention discloses a calculation method for checking and calculating the rolling force of high-speed hot-rolled bars. The method includes: 1) calculating the basic parameters; 2) calculating the temperature of the rolled piece; 3) calculating the rolling force parameters; the present invention combines the existing theoretical calculation formulas and empirical formulas, and proposes a set of simple and effective parameters through parameter correction. The calculation method of rolling energy can fully meet the needs of checking the rolling energy parameters of ordinary hot-rolled bar production lines, and can provide reference for design planning.

Description

technical field [0001] The invention relates to the field of high-speed hot-rolled bar production, in particular to a calculation method for checking and calculating the rolling force of hot-rolled threaded steel bars and round bars. [0002] technical background [0003] Traditional small-size bars are produced by uncoiling, straightening, and segmenting by using high-wire coils, but this method increases the cost of use and reduces the yield. At present, the high-speed rolling speed of the high-speed wire rod finishing mill and the fast braking system of the high-speed steel feeding system (including the tail brake and the subsequent hub) and the independent steel feeding system are used to produce high-speed bars for small-sized straight bars The production line has been actively promoted and applied, not only to meet the market demand for small-sized straight bars, but also to effectively avoid the trouble and waste caused by the use of high-wire coils, and to increase th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B38/08
CPCB21B38/08B21B2265/12B21B2201/06
Inventor 张向军张焰余延庆徐峰卢勇方实年吴诗阳
Owner HUATIAN ENG & TECH CORP MCC
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