阅读说明：本技术 一种镀锌钢板的生产方法及装置 (Production method and device of galvanized steel sheet ) 是由 李研 蒋光锐 滕华湘 齐达 张�浩 胡燕慧 任新意 徐海卫 于 2020-05-12 设计创作，主要内容包括：本发明提供了一种镀锌钢板的生产方法及装置,方法包括：在镀锌过程中,控制带钢运行速度为100～120m/min,控制带钢表面与气刀之间的距离为6～7mm；对光整机轧辊进行磨削,磨削方式为粗磨、半精磨及精磨；在粗磨中,控制砂轮转速为26～30r/min,控制轧辊转速为42～48r/min；在半精磨及精磨中,控制砂轮转速小于30r/min,轧辊转速大于42r/min；轧辊的粗糙度为1.5～2μm；对带钢进行光整,控制轧辊的单位轧制力为2200～3400KN；如此,通过控制轧辊的粗糙度,降低轧辊表面波纹度水平；通过对镀锌参数的控制以及轧制力控制,可以降低锌层起伏对波纹度的影响,进而满足涂装需要。(The invention provides a production method and a device of a galvanized steel sheet, wherein the method comprises the following steps: in the galvanizing process, the running speed of the strip steel is controlled to be 100-120 m/min, and the distance between the surface of the strip steel and the air knife is controlled to be 6-7 mm; grinding the roller of the polishing machine in a mode of coarse grinding, semi-fine grinding and fine grinding; in the coarse grinding, the rotating speed of a grinding wheel is controlled to be 26-30 r/min, and the rotating speed of a roller is controlled to be 42-48 r/min; in the semi-finish grinding and finish grinding, the rotating speed of the grinding wheel is controlled to be less than 30r/min, and the rotating speed of the roller is controlled to be greater than 42 r/min; the roughness of the roller is 1.5-2 mu m; finishing the strip steel, and controlling the unit rolling force of a roller to be 2200-3400 KN; thus, the level of the waviness of the surface of the roller is reduced by controlling the roughness of the roller; through the control of galvanizing parameters and rolling force control, the influence of the fluctuation of a zinc layer on the waviness can be reduced, and the coating requirement is further met.)

1. A method for producing a galvanized steel sheet, characterized by comprising:

in the galvanizing process, the running speed of the strip steel is controlled to be 100-120 m/min, and the distance between the surface of the strip steel and the air knife is controlled to be 6-7 mm;

grinding the roller of the finishing machine, wherein the grinding mode is controlled to be two times of coarse grinding, two times of semi-fine grinding and two times of fine grinding; wherein, in the coarse grinding process, the rotating speed of the grinding wheel is controlled to be 26-30 r/min, and the rotating speed of the roller is controlled to be 42-48 r/min; in the semi-finish grinding and finish grinding processes, the rotating speed of a grinding wheel is controlled to be less than 30r/min, and the rotating speed of a roller of the finishing machine is controlled to be greater than 42 r/min;

after the roller is ground, controlling the roughness of the roller to be 1.5-2 mu m;

and finishing the galvanized strip steel by using a finishing machine, and controlling the unit rolling force of the roller to be 2200-3400 KN.

2. The method of claim 1, wherein after the grinding of the roll, controlling the roughness of the roll to be 1.5 to 2 μm comprises:

roughening the ground roller, and controlling the surface roughness of the roughened roller to be 1.5-2 mu m; wherein the surface roughness of the ground roller is 0.3-0.4 μm.

3. The method according to claim 1, wherein the rotational speed of the grinding wheel is controlled to be 16 to 30r/min and the rotational speed of the roll of the finisher is controlled to be 42 to 50r/min during the finish grinding and semi-finish grinding.

4. The method of claim 1, wherein the strip has a thickness of 0.65 to 0.7 mm.

5. An apparatus for producing a galvanized steel sheet, characterized in that the apparatus comprises:

the first control unit is used for controlling the running speed of the strip steel to be 100-120 m/min and controlling the distance between the surface of the strip steel and the air knife to be 6-7 mm in the galvanizing process;

the second control unit is used for controlling the grinding mode to be two-time coarse grinding, two-time semi-fine grinding and two-time fine grinding when the roller of the finishing machine is ground; wherein, in the coarse grinding process, the rotating speed of the grinding wheel is controlled to be 26-30 r/min, and the rotating speed of the roller is controlled to be 42-48 r/min; in the semi-finish grinding and finish grinding processes, the rotating speed of the grinding wheel is controlled to be less than 30r/min, and the rotating speed of a roller of the finishing machine is controlled to be greater than 42 r/min;

the third control unit is used for controlling the roughness of the roller to be 1.5-2 mu m after the roller is ground;

and the fourth control unit is used for controlling the unit rolling force of the roller to be 2200-3400 KN when the finishing machine is used for finishing the galvanized strip steel.

6. The apparatus of claim 5, wherein the third control unit is specifically configured to:

when the ground roller is roughened, controlling the surface roughness of the roughened roller to be 1.5-2 mu m; wherein the surface roughness of the ground roller is 0.3-0.4 μm.

7. The apparatus of claim 5, wherein the second control unit is specifically configured to:

in the fine grinding and semi-fine grinding processes, the rotating speed of the grinding wheel is controlled to be 16-30 r/min, and the rotating speed of a roller of the finishing machine is controlled to be 42-50 r/min.

8. The apparatus of claim 5, wherein the strip has a thickness of 0.65 to 0.7 mm.

Technical Field

The invention belongs to the technical field of steel rolling, and particularly relates to a production method and a device of a galvanized steel sheet.

Background

In recent years, with the gradual improvement of the appearance quality requirement of the automobile industry, the surface quality requirement of the cold-rolled galvanized automobile outer plate is further improved. In order to meet the increasingly strict environmental requirements, automobile main engine plants gradually adopt a zirconium process to replace a phosphating process and adopt a floating coat-free process to replace the traditional coating process. The distinctness of image after automobile coating is not only related to the coating process of automobile factories, but also directly related to the surface structure of the automobile plates.

Generally, galvanized steel sheets are used for automobile plates, the key factor for optimally controlling the surface structure of the steel sheets is the waviness of the surfaces of the steel sheets, and the control of the level of the waviness has a great influence on the distinctness of image of the automobile plates after coating.

Disclosure of Invention

Aiming at the problems in the prior art, the embodiment of the invention provides a production method and a production device of a galvanized steel sheet, which are used for solving the technical problem that the brightness of an automobile sheet after coating cannot be guaranteed due to the fact that the waviness of the surface of the galvanized steel sheet is too high in the prior art.

The invention provides a production method of a galvanized steel sheet, which comprises the following steps:

in the galvanizing process, the running speed of the strip steel is controlled to be 100-120 m/min, and the distance between the surface of the strip steel and the air knife is controlled to be 6-7 mm;

grinding the roller of the finishing machine, wherein the grinding mode is controlled to be two times of coarse grinding, two times of semi-fine grinding and two times of fine grinding; wherein, in the coarse grinding process, the rotating speed of the grinding wheel is controlled to be 26-30 r/min, and the rotating speed of the roller is controlled to be 42-48 r/min; in the semi-finish grinding and finish grinding processes, the rotating speed of a grinding wheel is controlled to be less than 30r/min, and the rotating speed of a roller of the finishing machine is controlled to be greater than 42 r/min;

after the roller is ground, controlling the roughness of the roller to be 1.5-2 mu m;

and finishing the galvanized strip steel by using a finishing machine, and controlling the unit rolling force of the roller to be 2200-3400 KN.

Optionally, after the roller is ground, controlling the roughness of the roller to be 1.5-2 μm, including:

roughening the ground roller, and controlling the surface roughness of the roughened roller to be 1.5-2 mu m; wherein the surface roughness of the ground roller is 0.3-0.4 μm.

Optionally, in the fine grinding and semi-fine grinding processes, the rotating speed of the grinding wheel is controlled to be 16-30 r/min, and the rotating speed of the roller of the finishing machine is controlled to be 42-50 r/min.

Optionally, the thickness of the strip steel is 0.65-0.7 mm.

The present invention also provides a production apparatus for a galvanized steel sheet, the apparatus comprising:

the first control unit is used for controlling the running speed of the strip steel to be 100-120 m/min and controlling the distance between the surface of the strip steel and the air knife to be 6-7 mm in the galvanizing process;

the second control unit is used for controlling the grinding mode to be two-time coarse grinding, two-time semi-fine grinding and two-time fine grinding when the roller of the finishing machine is ground; wherein, in the coarse grinding process, the rotating speed of the grinding wheel is controlled to be 26-30 r/min, and the rotating speed of the roller is controlled to be 42-48 r/min; in the semi-finish grinding and finish grinding processes, the rotating speed of the grinding wheel is controlled to be less than 30r/min, and the rotating speed of a roller of the finishing machine is controlled to be greater than 42 r/min;

the third control unit is used for controlling the roughness of the roller to be 1.5-2 mu m after the roller is ground;

and the fourth control unit is used for controlling the unit rolling force of the roller to be 2200-3400 KN when the finishing machine is used for finishing the galvanized strip steel.

Optionally, the third control unit is specifically configured to:

when the ground roller is roughened, controlling the surface roughness of the roughened roller to be 1.5-2 mu m; wherein the surface roughness of the ground roller is 0.3-0.4 μm.

Optionally, the second control unit is specifically configured to:

in the fine grinding and semi-fine grinding processes, the rotating speed of the grinding wheel is controlled to be 16-30 r/min, and the rotating speed of a roller of the finishing machine is controlled to be 42-50 r/min.

Optionally, the thickness of the strip steel is 0.65-0.7 mm.

The invention provides a production method and a device of a galvanized steel sheet, wherein the method comprises the following steps: in the galvanizing process, the running speed of the strip steel is controlled to be 100-120 m/min, and the distance between the surface of the strip steel and the air knife is controlled to be 6-7 mm; grinding the roller of the finishing machine, wherein the grinding mode is controlled to be two times of coarse grinding, two times of semi-fine grinding and two times of fine grinding; wherein, in the coarse grinding process, the rotating speed of the grinding wheel is controlled to be 26-30 r/min, and the rotating speed of the roller is controlled to be 42-48 r/min; in the semi-finish grinding and finish grinding processes, the rotating speed of the grinding wheel is controlled to be less than 30r/min, and the rotating speed of a roller of the finishing machine is controlled to be greater than 42 r/min; after the roller is ground, controlling the roughness of the roller to be 1.5-2 mu m; finishing the galvanized strip steel by using a finishing machine, and controlling the unit rolling force of the roller to be 2200-3400 KN; therefore, through optimization of the roll grinding process parameters, the vibration of the grinding machine in the roll grinding process is reduced, and the adverse effect of the vibration of the grinding machine on the surface of the roll is reduced; the roughness after grinding and the roughness after texturing of the roller are controlled, so that the level of the waviness of the surface of the roller is reduced; by controlling the galvanizing parameters and the rolling force, the influence of the fluctuation of the zinc layer on the waviness can be reduced, the waviness of the surface of the strip steel can meet the coating requirement, and the distinctness of image of the coated automobile plate is further ensured.

Drawings

FIG. 1 is a schematic flow chart of a method for producing a galvanized steel sheet according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a production apparatus for a galvanized steel sheet according to a second embodiment of the present invention.

Detailed Description

In order to solve the technical problem that the surface waviness of a galvanized steel sheet in the prior art is too high, so that the distinctness of image of an automobile sheet after coating cannot be guaranteed, the invention provides a production method and a device of the galvanized steel sheet, wherein the method comprises the following steps: in the galvanizing process, the running speed of the strip steel is controlled to be 100-120 m/min, and the distance between the surface of the strip steel and the air knife is controlled to be 6-7 mm; grinding the roller of the finishing machine, wherein the grinding mode is controlled to be two times of coarse grinding, two times of semi-fine grinding and two times of fine grinding; wherein, in the coarse grinding process, the rotating speed of the grinding wheel is controlled to be 26-30 r/min, and the rotating speed of the roller is controlled to be 42-48 r/min; in the semi-finish grinding and finish grinding processes, the rotating speed of the grinding wheel is controlled to be less than 30r/min, and the rotating speed of a roller of the finishing machine is controlled to be greater than 42 r/min; after the roller is ground, controlling the roughness of the roller to be 1.5-2 mu m; and finishing the galvanized strip steel by using a finishing machine, and controlling the unit rolling force of the roller to be 2200-3400 KN.

The technical solution of the present invention is further described in detail by the accompanying drawings and the specific embodiments.