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Rolling force energy checking and calculating method for high-speed hot-rolled bar

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

Active Publication Date: 2020-05-05
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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  • Rolling force energy checking and calculating method for high-speed hot-rolled bar
  • Rolling force energy checking and calculating method for high-speed hot-rolled bar
  • Rolling force energy checking and calculating method for high-speed hot-rolled bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] Take the production of two-cut Φ10mm rebar in a high-speed bar factory as an example to calculate. The plant has a total of 6 roughing mills, 6 intermediate rolling mills, 6 pre-finishing mills, 2 sets of top-cross 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. It can be seen from the results in Table 3 of rolling mill capacity calculation that the power of the 24 rolling mills and motors equipped by the factory can fully meet the production of two-cut Φ10mm threaded steel bars.

[0121] Table 1 Basic parameter calculation table

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

[0123]

[0124] Table 2 Calculation table of temperature of each pass rolling

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

The initial temperature Roll cooling water...

Embodiment 2

[0129] Further, the calculation is carried out by taking the rolling production of two-cut Φ12mm threaded steel bars in this high-speed bar factory as an example. Similarly, the calculation process is shown in the following three tables, where the red numbers are known data. It can be seen from the results in Table 3 of the capacity calculation of the rolling mill that the power of the 24 rolling mills and the motors equipped by the factory can fully meet the production of two-cut Φ12mm threaded steel bars.

[0130] Table 1 Basic parameter calculation table

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

[0132]

[0133] Table 2 Calculation table of temperature of each pass rolling

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

The initial temperature Roll cooling water temperature drop ΔT w

Radiation temperature drop ΔT f

Convective temperature d...

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Abstract

The invention discloses a rolling force energy checking and calculating method for a high-speed hot-rolled bar. The method comprises the following steps of 1) calculating basic parameters; 2) calculating the temperature of a rolled piece; and 3) calculating rolling force energy parameters. According to the method, an existing theoretical calculation formula and an empirical formula are combined, and through parameter correction, a simple, convenient and effective rolling force energy calculation method is provided, the calculation result completely meets the requirement of rolling force energyparameter checking of a common hot-rolled bar production line, and reference can be provided 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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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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