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Roll Surface Decreasing Current Grinding Technology

A current and grinding technology, applied in the field of steel grinding, can solve the problems of unstable operation, uneven hardness of grinding wheels, vibration lines, helical surface quality grinding, etc.

Active Publication Date: 2019-04-19
BENGANG STEEL PLATES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The Hercules grinding machine of Benxi Iron and Steel Works was put into use in 1996 and has been in operation for nearly 20 years. During this period, there has been no modification of the mechanical and electrical systems. The equipment is seriously aging, and the operation is extremely unstable. Vibration lines and spiral lines often appear on the surface quality. Grinding defects; the grinding wheel used in the grinding machine is localized, and the localized grinding wheel has uneven hardness and other phenomena, which increases the risk of spiral lines and vibration lines; the grinding method has been using the grinding program that comes with the H-bed for 20 years. And the process method, has been unable to meet the increasing grinding quality requirements

Method used

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  • Roll Surface Decreasing Current Grinding Technology
  • Roll Surface Decreasing Current Grinding Technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First, the grinding process is taken as the abscissa, and the grinding current is taken as the ordinate, then the traditional grinding and the improved grinding current-grinding process coordinate diagram can be drawn:

[0024] Traditionally, the grinding of rolls is completed in three steps: coarse grinding, semi-finishing, and fine grinding. The grinding process parameters of these three steps are listed as follows:

[0025]

Grinding wheel speed m / s

Roll revolution m / r

Large carriage feed mm / min

coarse grinding

33～35

30～35

Around 2500

semi-finish

25～30

35～40

Around 1500

fine grinding

20～25

40～50

around 800

[0026] The specific operation steps of the improved decreasing grinding are as follows:

[0027] (1) Coarse grinding: the grinding current is controlled at 40A, the linear speed of the grinding wheel is 35m / s, the rotation speed of the head frame is 30r / min, the speed of the large carriag...

Embodiment 2

[0037] (1) Coarse grinding: the grinding current is controlled at 50A, the linear speed of the grinding wheel is 45m / s, the rotation speed of the head frame is 40r / min, the speed of the large carriage is 3m / min, and the current is 50A;

[0038] (2) Fine grinding: 1 pass of decreasing fine grinding: the linear speed of the grinding wheel is 40m / s, the rotation speed of the head frame is 40r / min, the speed of the large carriage is 2.5m / min, and the current is 40A;

[0039] Decreasing fine grinding 2 passes: grinding wheel linear speed 35m / s, head frame rotation speed 30r / min, large carriage speed 1~2m / min, current 35A;

[0040] Decreasing fine grinding for 3 passes: the linear speed of the grinding wheel is 35m / s, the rotation speed of the head frame is 30r / min, the speed of the large carriage is 1m / min, and the current is 30A;

[0041] Decreasing fine grinding 4 passes: the linear speed of the grinding wheel is 25m / s, the rotation speed of the head frame is 30r / min, the speed o...

Embodiment 3

[0044] (1) Coarse grinding: the grinding current is controlled at 45A, the linear speed of the grinding wheel is 40m / s, the rotation speed of the headstock is 35r / min, the speed of the large carriage is 2m / min, and the current is 45A;

[0045] (2) Fine grinding: 1 pass of decreasing fine grinding: the linear speed of the grinding wheel is 30-40m / s, the rotation speed of the head frame is 30-40r / min, the speed of the large carriage is 1.5-2.5m / min, and the current is 38A;

[0046] Decreasing fine grinding with 2 passes: the linear speed of the grinding wheel is 25-35m / s, the rotation speed of the head frame is 20-30r / min, the speed of the large carriage is 1-2m / min, and the current is 33A;

[0047] Decreasing fine grinding for 3 passes: the linear speed of the grinding wheel is 25-35m / s, the rotation speed of the head frame is 20-30r / min, the speed of the large carriage is 0.5-1m / min, and the current is 28A;

[0048] Decreasing fine grinding 4 passes: the linear speed of the gr...

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Abstract

The invention belongs to the technical field of steel grinding, and in particular relates to a roll surface current decreasing grinding process; a roll surface current decreasing grinding process, which is characterized in that the process includes two steps of rough grinding and fine grinding in sequence: (1) Coarse grinding: the grinding current is controlled at 40-50A, the linear speed of the grinding wheel is 35-45m / s, the rotation speed of the head frame is 30-40r / min, the speed of the large carriage is 2-3m / min, and the current is 40-50A; Grinding: The grinding method with a gradual decrease in the grinding current is adopted, that is, the current of each grinding pass is reduced by about 5A compared with the previous pass, and it is divided into five passes in total until the grinding current reaches 15-20A , the entire grinding process is over; it solves some common defects such as spiral patterns, scratches, and vibration patterns on the rolled rolls that are prone to appear in the traditional grinding process.

Description

technical field [0001] The invention belongs to the technical field of steel grinding, and in particular relates to a roll surface current decreasing grinding process. Background technique [0002] The Hercules grinding machine of Benxi Iron and Steel Works was put into use in 1996 and has been in operation for nearly 20 years. During this period, there has been no modification of the mechanical and electrical systems. The equipment is seriously aging, and the operation is extremely unstable. Vibration lines and spiral lines often appear on the surface quality. Grinding defects; the grinding wheel used in the grinding machine is localized, and the localized grinding wheel has uneven hardness and other phenomena, which increases the risk of spiral lines and vibration lines; the grinding method has been using the grinding program that comes with the H-bed for 20 years. And the process method has been unable to meet the increasing grinding quality requirements. Contents of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B1/00
CPCB24B1/00
Inventor 朱德忠高身杰
Owner BENGANG STEEL PLATES