CN116000098A - Method for improving anti-slip performance of R2 high-speed steel roller - Google Patents

Abstract

The invention relates to the technical field of anti-slip of high-speed steel rollers, and discloses a method for improving the working anti-slip performance of an R2 high-speed steel roller, which comprises the following steps: s1, gradually adjusting the rotating speed of the grinding wheel from 10m/sec to 8m/sec and 7m/sec, verifying the minimum limiting rotating speed of the grinding wheel, and testing corresponding to 3.1um, 3.5um and 3.7um as the rotating speed of the grinding wheel is reduced and the roughness is larger and larger; s2, the number of times of final grinding of the finishing cutter is adjusted from 1 time to 2 times, the roller surface grinding roughness is more uniform, and the grinding degree is more thorough; s3, continuously feeding the cutter to be 0.060mm from 0.048mm, and finally, gradually lifting the thickness of the roller surface of the smooth cutter section to be more than 4.1um corresponding to 3.7um of the whole roller surface. According to the invention, the rotational speed of the grinding wheel, continuous feeding and grinding pass are debugged, the roughness successfully breaks through more than 3.7um, and the roughness is stably more than 4.0um, so that the problem of R2 working slip is effectively improved through verification on-machine test, and the R2 high-speed steel roller rolling is stably controlled.

Description

Method for improving anti-slip performance of R2 high-speed steel roller

Technical Field

The invention relates to the technical field of anti-slip of high-speed steel rollers, in particular to a method for improving the working anti-slip of an R2 high-speed steel roller.

Background

Because of the grinding process, the roughness of the working rolls of the traditional hot rolling production line R2 is controlled within 3.1 um. Through experiments, when the roughness of the R2 high-speed steel roller is less than 3.1um, the phenomenon of roller surface skidding (the rolling tonnage is 3500-6500 tons is serious) can occur after the roller is on machine, and the rolling stability is seriously influenced as shown by the central line deviation of the 3 rd pass of the R2.

Few steel factories such as 1880 hot rolling and armed steel stock in the research country use R2 high-speed steel rolls, the roughness of the new R2 high-speed steel rolls is controlled to be 2.5-3.0 mu m, and slipping and deviation generally occur when the rolling is carried out at the first 8000 tons, so that the rolling stability is affected. The next 2 uses use the old roller to grind locally, i.e. the rough roller surface of the center of the last roller is reserved to control the slip. However, when the roller is used for the 3 rd time, all roller surfaces are required to be ground, when the new roller adopts the roughness of 2.5-3.0um, the risk of skidding is faced, and at the moment, skidding is generally controlled by means of planning, rough rolling water reducing and speed reducing and the like, so that certain risk influence is brought to rolling stability and finished product quality.

Disclosure of Invention

(one) solving the technical problems

Aiming at the defects of the prior art, the invention provides a method for improving the working anti-slip performance of an R2 high-speed steel roller, and solves the problems in the prior art.

(II) technical scheme

In order to achieve the above purpose, the present invention provides the following technical solutions: a method for improving the anti-slip performance of R2 high-speed steel rolls comprises the following steps:

s1, gradually adjusting the rotating speed of the grinding wheel from 10m/sec to 8m/sec and 7m/sec, verifying the minimum limiting rotating speed of the grinding wheel, and testing corresponding to 3.1um, 3.5um and 3.7um as the rotating speed of the grinding wheel is reduced and the roughness is larger and larger;

s2, the number of times of final grinding of the finishing cutter is adjusted from 1 time to 2 times, the roller surface grinding roughness is more uniform, and the grinding degree is more thorough;

s3, continuously feeding the cutter to be 0.060mm from 0.048mm, and finally, gradually lifting the thickness of the roller surface of the smooth cutter section to be more than 4.1um corresponding to 3.7um of the whole roller surface.

(III) beneficial effects

The invention provides a method for improving the anti-slip performance of an R2 high-speed steel roller, which has the following beneficial effects:

according to the invention, the rotational speed of the grinding wheel, continuous feeding and grinding pass are debugged, the roughness successfully breaks through more than 3.7um, and the roughness is stably more than 4.0um, so that the problem of R2 working slip is effectively improved through verification on-machine test, and the R2 high-speed steel roller rolling is stably controlled.

Drawings

FIG. 1 is a plot of the center deviation of pass 3 of R2 versus the rolling weight of R2;

fig. 2 is a schematic view of the roll shape of an R2 high steel roll.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention provides a technical scheme that: a method for improving the anti-slip performance of R2 high-speed steel rolls comprises the following steps:

the rotation speed of the grinding wheel is gradually adjusted to 7m/sec, the number of times of grinding finishing cutters is 2, the continuous feeding is adjusted to 0.060mm from 0.048mm, and the R2 height steel roller surface is stabilized to be more than 4.0um.

The tracking slip condition is controlled, the deviation of the center line of the strip steel is basically controlled within 50mm, and the rolling process is stable, as shown in figure 1.

The R2 high speed steel roll surface was ground to a concave roll surface as shown in fig. 2.

The roll body is set to have a certain length Bmm in the middle during grinding, and the total length of the roll body is Amm. The two ends are ground by a flat roller procedure, specifically:

the length of the middle concave roll surface B can be determined according to the widths of the strip steel of different production lines, so that the width of the B is larger than the width of the strip steel, and the strip steel is controlled to be in the concave roll surface in the width direction, thereby preventing deviation and slipping.

Meanwhile, the rolling plan is combined, the slip period of a high-speed steel roll is usually within 1.2 ten thousand tons, and the width of the strip steel is planned by combining the rolling time.

The general arrangement is: concave roll surface width = strip average width + (100-200) mm

And controlling most of strip steel rolling: the width of the concave roller surface is larger than the width of the strip steel. At this time, the rolling stability of the strip steel is ensured in the rolling process.

If the width of the strip steel in the slip period is mainly concentrated on 1250mm on average, the width of the concave roll surface can be 1350-1450mm to control the slip.

The roll concavity can be adjusted according to actual conditions: the roll is generally adjusted in 100-200um, the larger the concave radius is, the better the slip is controlled in the actual process, but the roll is required to be tracked and used safely, and whether the roll body has cracks or not is judged.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (1)

1. A method for improving the anti-slip performance of an R2 high-speed steel roll, comprising the steps of:

s1, gradually adjusting the rotating speed of the grinding wheel from 10m/sec to 8m/sec and 7m/sec, verifying the minimum limiting rotating speed of the grinding wheel, and testing corresponding to 3.1um, 3.5um and 3.7um as the rotating speed of the grinding wheel is reduced and the roughness is larger and larger;

s2, adjusting the number of times of final grinding of the optical cutter from 1 time to 2 times;

s3, continuously feeding the cutter to be 0.060mm from 0.048mm, and finally, gradually lifting the thickness of the roller surface of the smooth cutter section to be more than 4.1um corresponding to 3.7um of the whole roller surface.

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