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Production method and device for galvanized steel plate

A technology of galvanized steel sheet and production method, which is applied in hot-dip plating process, machine tool designed for grinding the rotating surface of workpiece, coating, etc. to guarantee and other issues

Inactive Publication Date: 2020-09-15
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a method and device for producing galvanized steel sheets, which are used to solve the problem that the corrugation on the surface of galvanized steel sheets in the prior art is too high, resulting in the poor reflection of the automobile sheet after painting. Technical issues where sex is not guaranteed

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  • Production method and device for galvanized steel plate
  • Production method and device for galvanized steel plate

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Experimental program
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Embodiment 1

[0030] The present embodiment provides a kind of production method of galvanized steel sheet, as figure 1 As shown, the methods include:

[0031] S110, during the galvanizing process, control the running speed of the strip to 100-120m / min, and control the distance between the surface of the strip and the air knife to 6-7mm;

[0032] Generally, the steel strip can be used as an automobile plate after galvanizing and finishing. During the galvanizing process, an air knife is used to blow away the excess zinc liquid on the surface of the strip steel. In order to avoid the undulation of the zinc layer on the surface of the strip steel, resulting The surface corrugation of the strip is too large. During the galvanizing process, the running speed of the strip is controlled to be 100-120m / min, and the distance between the surface of the strip and the air knife is controlled to be 6-7mm. Among them, the strip thickness is 0.65-0.7mm.

[0033] S111, grinding the roll of the skin pass...

Embodiment 2

[0047] This embodiment provides a production device for galvanized steel sheets, such as figure 2 As shown, the device includes: a first control unit 21, a second control unit 22, a third control unit 23 and a fourth control unit 24; wherein,

[0048] The first control unit 21 is used to control the running speed of the strip steel to be 100-120m / min during the galvanizing process, and to control the distance between the surface of the strip steel and the air knife to be 6-7mm;

[0049] The second control unit 22 is used for grinding the rolls of the skin pass mill, and the control grinding method is two passes of rough grinding, two passes of semi-fine grinding and two passes of fine grinding; wherein, during the rough grinding process , the control grinding wheel speed is 26~30r / min, the control roll speed is 42~48r / min; in the process of semi-finishing and fine grinding, control the speed of the grinding wheel to be less than 30r / min, control the roll speed of the skin pas...

Embodiment 3

[0063] In practical application, when using the method and device provided in Embodiment 1 to produce galvanized automobile outer panels with a thickness of 0.7 mm and a width of 1700 mm, the specific implementation is as follows:

[0064] During the galvanizing process, the running speed of the strip is controlled to be 100m / min, and the distance between the surface of the strip and the air knife is controlled to be 6.5mm.

[0065] After galvanizing, the strip steel after galvanizing needs to be skinned. In order to avoid the roughness of the rolls of the skin pass machine from affecting the waviness of the strip surface, the rolls of the skin pass machine should be ground before skin skinning. cut.

[0066] During the grinding process, the controlled grinding method is coarse grinding, two semi-finishing passes and two fine grindings (that is, two semi-finishing followed by two fine grindings); during the rough grinding process, the grinding wheel speed is controlled It is ...

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Abstract

The invention provides a production method and device for a galvanized steel plate. The method comprises the steps that in the galvanizing process, operation speed of strip steel is controlled to be 100-120 m / min, and the distance between the surface of the strip steel and an air cutter is controlled to be 6-7 mm; a finishing lathe rolling roller is grinded, and coarse grinding, semi-finishing grinding and finishing grinding are adopted in the grinding manner; in the coarse grinding process, the rotating speed of a grinding wheel is controlled to be 26-30 r / min, and the rotating speed of the rolling roller is controlled to be 42-48 r / min; in the semi-finishing grinding process and the finishing grinding process, the rotating speed of the grinding wheel is controlled to be smaller than 30 r / min, and the rotating speed of the rolling roller is larger than 42 r / min; the roughness degree of the rolling roller is 1.5-2 micrometers; finishing is carried out on the strip steel, and the unit rolling force of the rolling roller is controlled to be 2200-3400 KN. Therefore, by controlling the roughness degree of the rolling roller, the surface waviness level of the rolling roller is reduced.By controlling galvanizing parameters and rolling force, the influence on the waviness degree from fluctuation of a zinc layer can be reduced, and then the requirement for coating can be met.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a production method and device for galvanized steel sheets. Background technique [0002] In recent years, with the gradual improvement of the appearance quality requirements of the automobile industry, the requirements for the surface quality of cold-rolled galvanized automobile outer panels have been further improved. In response to increasingly stringent environmental protection requirements, auto OEMs are gradually adopting zirconium treatment instead of phosphating and medium-free coating instead of traditional coating. The sharpness of image after painting is not only related to the painting process of the car factory, but also directly related to the surface structure of the car plate. [0003] Generally speaking, galvanized steel sheets are used for automobile sheets. The key factor for optimal control of the steel sheet surface structure is the wavines...

Claims

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Application Information

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IPC IPC(8): B24B5/37B24B27/00C23C2/00C23C2/06C23C2/20C23C2/26C23C2/40B21B1/22
CPCB24B5/37B24B27/0023B24B27/0076C23C2/06C23C2/20C23C2/40C23C2/003C23C2/26B21B1/22B21B2001/228B21B2265/12
Inventor 李研蒋光锐滕华湘齐达张浩胡燕慧任新意徐海卫
Owner SHOUGANG CORPORATION
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