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Manufacturing method of hot-rolled checkered plate

A manufacturing method and checkered plate technology, applied in the direction of metal rolling, etc., can solve the problems of deteriorating plate shape quality, inability to stably produce thin or extremely thin checkered plates in batches, and insufficient height of checkered plates, etc., to solve the problem of checkered plate The conflict between plate shape and pattern height, good marketing value and application prospect, and the effect of solving wave shape defects that are difficult to control

Active Publication Date: 2020-08-14
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The embossing of the checkered plate is realized at the end stand of the finished product. In order to ensure the height of the pattern, a large reduction in the end stand is usually used, and a large reduction will inevitably increase the rolling load, and the increase in the rolling load will deteriorate The quality of the plate shape. In order to ensure that the rolling of the checkered plate will not affect the quality of other strip steel rolling in the traditional production process of the checkered plate, the checkered plate is selected to be rolled at the end of the service of the back-up roll of the finishing rolling unit. Replace the back-up rolls after the strip, and at the end of the service of the back-up rolls, the strip shape is more difficult to control, mainly manifested as bilateral wave-shaped defects or uneven pattern height in the width direction of the strip; therefore, the strip shape of the checkered plate under the traditional production mode There is a contradiction between the control and the control of the height of the pattern, which also reflects that the poor shape of the pattern plate or the insufficient height of the pattern have become the main and most prominent quality objections during the use of the pattern plate, especially for thin and extremely thin pattern plates. If the contradiction between plate shape and pattern height control is not resolved, it will never be possible to stably produce high-quality thin or extremely thin pattern plates in batches

Method used

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  • Manufacturing method of hot-rolled checkered plate
  • Manufacturing method of hot-rolled checkered plate
  • Manufacturing method of hot-rolled checkered plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this example, 1,200 tons of checkered plates are rolled, and 67 rolls are produced at one time. The rolling specifications: thickness is 1.8-5.75mm, width is 1080-1280mm, and the specific production steps are as follows:

[0025] (1) The rolling of patterned coils is arranged after the 683km service period after the replacement of the finish rolling backup rolls;

[0026] (2) In the patterned plate rolling process, the total rolling kilometers is 71km, and the embossing frame work rolls are replaced once during the rolling cycle;

[0027] (3) The rolling specification of checkered plate transitions from wide to narrow: 5.75×1280mm→4.5×1250mm→2.750×1180mm→replace patterned roll→3.5×1250mm (12 rolls)→2.30×1150(6 rolls)→1.8×1100mm( 20 rolls) → 2.5×1080mm (8 rolls);

[0028] (4) The embossing rolls for rolling thin-gauge rolls are used for the second time on the machine;

[0029] (5) After the patterned coil rolling is completed, two kinds of steel coils are rolled at ...

Embodiment 2

[0035] In this embodiment, 1,750 tons of checkered plates are rolled, and 92 rolls are produced at one time. The rolling specifications: thickness is 1.5-6.0mm, width is 1050-1250mm, and the specific production steps are as follows:

[0036] (1) The rolling of patterned coils is arranged after the 800km service period after the replacement of the finish rolling backup rolls;

[0037] (2) In the rolling process of the checkered plate, the total rolling mileage is 92km, and the working rolls of the embossing stand are replaced twice during the rolling cycle;

[0038] (3) Checkered plate rolling specifications transition from wide to narrow: 3.0×1250mm (5 rolls)→2.5×1190mm (3 rolls)→2.0×1100mm (5 rolls)→1.8×1080mm (12 rolls)→1.5×1050mm ( 7 rolls)→replace pattern roller→5.0×1250mm→6.0×1150mm→7.6×1100mm→6.5×1080mm→replace pattern roller→5.0×1250mm→5.75×1230mm→5.0×1200mm→4.0×1180mm;

[0039] (4) The embossing rolls for rolling thin-gauge rolls are used for the second time on the ma...

Embodiment 3

[0046] In this embodiment, rolling of 1520 tons of checkered plates is carried out, and 84 rolls are produced at one time. The rolling specifications: the thickness is 1.5-10.0 mm, and the width is 1050-1280 mm. The specific production steps are as follows:

[0047] (1) The rolling of patterned coils is arranged after the 731km service period after the replacement of the finish rolling backup rolls;

[0048] (2) In the rolling process of the checkered plate, the total rolling mileage is 92km, and the working rolls of the embossing stand are replaced twice during the rolling cycle;

[0049](3) Checkered plate rolling specifications transition from wide to narrow: 4.5×1250mm (7 rolls)→3.0×1250mm (5 rolls)→2.5×1200mm (3 rolls)→1.8×1150mm (15 rolls)→2.0×1080mm ( 4 rolls)→1.5×1050mm (5 rolls)→replace pattern roller→4.5×1250mm→5.0×1150mm→4.5×1100mm→3.5×1080mm→replace pattern roller→6.0×1250mm→7.5×1230mm→8.0×1200mm→10.0× 1200mm, in the thin-gauge checkered plate rolling process, in ...

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Abstract

The invention discloses a manufacturing method of a hot-rolled checkered plate. Rolling of the checkered plate is arranged at the early stage of service of a finish rolling supporting roller of a hotcontinuous rolling unit. According to the manufacturing method of the hot-rolled checkered plate, by improving a rolling process of the hot-rolled checkered plate, the rolling process of the checkeredplate is arranged at the earlier stage of the service of the finish rolling supporting roller of the hot continuous rolling unit, the checkered plate is rolled by using a strip steel rolling production line on the premise of not increasing the production cost, the rolling quality of the checkered plate is guaranteed, the subsequent strip steel production is not influenced as well, the method notonly solves the conflict between the checkered plate shape and the pattern height in a traditional rolling process, but also solves the problem that the wave-shaped defect of the flat strip steel rolled in the middle and early stages of the finish rolling supporting roller of the finishing rolling unit is difficult to control, realizes batch rolling of the thin-specification and ultra-thin-specification high-quality checkered plate, and has good market popularization value and application prospect.

Description

technical field [0001] The invention relates to the technical field of hot continuous rolling, in particular to a method for manufacturing a hot-rolled checkered plate. Background technique [0002] Hot-rolled patterned steel plate (referred to as patterned plate) is widely used in construction, machinery manufacturing, bridges, transportation, shipbuilding and other fields because of its beautiful appearance, good anti-skid effect, and easy cleaning. Continuous hot rolling is the main process of checkered plate production. Lentil-shaped checkered plate has become the main bean shape of checkered plate because of its wear resistance, appearance, non-slip and no oil and water storage. Checkered plates usually have no special requirements on product composition and performance, but the market demand is large and the price is high. Therefore, checkered plates are usually a profitable variety for hot rolling companies, and major steel mills are competing to develop and produce t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/26
CPCB21B1/26
Inventor 刘勇刘富贵郭宏郭韬李海波付芹朱自军张友银
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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