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Straightening method for flat-bulb steel and straightening roll

A technology of flat bulb steel and straightening rolls, applied in the field of straightening of bulb flat steel, can solve the problems of backward production technology, high consumption of tooling, poor surface quality, etc., achieve high versatility, reduce labor intensity, and improve roll utilization rate effect

Inactive Publication Date: 2018-07-20
ANGANG STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the production technology of domestic spherical flat steel is relatively backward, the yield is low, the consumption of tooling is high, and the surface quality is poor

Method used

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  • Straightening method for flat-bulb steel and straightening roll
  • Straightening method for flat-bulb steel and straightening roll
  • Straightening method for flat-bulb steel and straightening roll

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Experimental program
Comparison scheme
Effect test

Embodiment

[0029] A kind of straightening method of bulb flat steel, concrete steps are as follows:

[0030] 1) The straightening method of marine bulb flat steel adopts the "oblique straightening method", that is, the bulb flat steel enters the 900 straightening machine at an angle of 18°; the pass position is adjusted at the center of the roller table;

[0031] 2) The passes of the upper and lower straightening rollers are straightened and bent up and down, and the side walls of the pass are adjusted horizontally.

[0032] 3) The straightening pressure decreases sequentially from the entrance direction, the pressure of 1 roll is 15mm, and the pressure of each roll is reduced by 1-3mm, the up and down bending is adjusted according to the pressure, and the horizontal bending is adjusted according to the axial force;

[0033] 4) When the main roller and the upper roller are directly assembled, the model 180 rail head is produced. When producing larger-sized spherical flat steel, a gasket ...

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Abstract

The invention relates to a straightening method for flat-bulb steel. The method comprises the steps that 1) 'oblique straightening method' is adopted as the straightening method for the flat-bulb steel for shipbuilding, that is, the flat-bulb steel obliquely enters into a straightening machine at an angle of 16 degrees to 25 degrees; 2) upper and lower straightening rolls of a hole pattern adjustsvertical bending, the side wall of the end face of the hole pattern adjusts horizontal bending, the upper straightening roll is a two-piece combination type, and the lower straightening roll is an integral type; 3) straightening pressures are sequentially decreased from an entrance direction of the straightening machine, and a depressed stroke is adjusted within a range of 4 millimeters to 15 millimeters. The straightening method for the flat-bulb steel has the advantages that the flat-bulb steel is straightened by a roll type straightening machine, a cross-sectional shape is rolled by combining with an oblique rolling method, and the straightening positions are a flat-bulb steel web plane and the outer side of a bulb. The combined upper straightening roll can effectively solve the problem that the side wall is broken due to excessive axial force, and thereby roll scrap is produced, the straightening roll consumption is greatly reduced, the straightening quality and output are remarkably improved, the oblique straightening method reduces the amount of vehicle repair and improves the utilization rate of the rolls.

Description

technical field [0001] The invention relates to a profile rolling process, in particular to a method for straightening bulb flat steel. Background technique [0002] Bulb flat steel is the key structural steel used in shipbuilding. With the development of national shipbuilding enterprises, the demand continues to increase, and the requirements for finished product rate are also getting higher and higher. At present, the production technology of domestic bulb flat steel is relatively backward, the yield rate is low, the consumption of tooling is high, and the surface quality is poor. It has become an important goal of domestic rolling mills to develop a new form of straightening process for shipbuilding flat bulbs. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a straightening method for flat bulbs, so as to realize low-consumption mass production of flat bulbs for shipbuilding of model 180 and above, and reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D3/04B21D37/00
CPCB21D3/04B21D37/00
Inventor 王忠强孙景惠孙占林黄永阔
Owner ANGANG STEEL CO LTD
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