CN116100379A

CN116100379A - Method, system and equipment for controlling roller roughness

Info

Publication number: CN116100379A
Application number: CN202310022880.1A
Authority: CN
Inventors: 张延杰; 林悦; 张文亮; 何智邦; 李真杰
Original assignee: Shougang Jingtang United Iron and Steel Co Ltd
Current assignee: Shougang Jingtang United Iron and Steel Co Ltd
Priority date: 2023-01-08
Filing date: 2023-01-08
Publication date: 2023-05-12

Abstract

The invention discloses a method, a system and equipment for controlling roller roughness, which comprises coarse grinding, middle grinding, first fine grinding, second fine grinding, third fine grinding and measuring roller shape and roundness; based on preset grinding parameters, when the roughness of the ground roller is larger than the target roughness; grinding a first preset number of passes while grinding is in progress; performing a finish grinding pass, returning the middle grinding to perform the rest grinding pass; and adjusting the finish grinding pass based on a preset strategy according to the measured roughness when the third finish grinding step executes the second preset number of passes. And establishing a reference grinding parameter, and adjusting based on the reference grinding parameter, so that the grinding efficiency is improved under the condition of no defect.

Description

Method, system and equipment for controlling roller roughness

Technical Field

The invention relates to the technical field of roller grinding, in particular to a method, a system and equipment for controlling roller roughness.

Background

In the 0.4um roughness grinding process of the roller of the grinding continuous annealing and cover annealing leveling machine, a 5SG120 type grinding wheel is mainly used, the effective diameter range of the grinding wheel is 480-750 mm, the roller shape of the roller is a CVC curve, the effective diameter of the roller is 400-450 mm, and the grinding process of the grinding wheel is mainly divided into the steps of rough grinding, middle grinding, first fine grinding, second fine grinding, third fine grinding, roller shape measurement and roundness. In the prior art, the roughness is reduced or improved only by theoretically reducing or increasing the rotation speed of the grinding wheel or changing the grinding pass and the grinding pressure; however, the existing grinding method has the defects of unobvious effect of precisely controlling roughness and easiness in generating cutter lines, vibration lines, twills and the like; on the other hand, no standard data is used as reference for adjusting the grinding parameters, repeated regrinding can occur, and the grinding efficiency is greatly affected. There is thus a great need for a method, system and apparatus for controlling roll roughness.

Disclosure of Invention

According to the method, the system and the equipment for controlling the roller roughness, the technical problem that the grinding efficiency is greatly affected due to the fact that repeated regrinding does not occur in reference data in the prior art during adjustment of grinding parameters is at least partially solved, and the technical effect of improving the grinding efficiency under the condition that defects are not generated is achieved.

In order to solve the above technical problems, the embodiment of the present invention provides the following technical solutions:

a method of controlling roll roughness comprising rough grinding, intermediate grinding, first refining, second refining, third refining and measuring roll shape and roundness, said method further comprising:

based on preset grinding parameters, when the roughness of the ground roller is larger than the target roughness;

grinding a first preset number of passes when the intermediate grinding is performed;

performing a fine grinding pass, and returning to the rest pass of the middle grinding;

and when the third fine grinding step executes the second preset number of passes, the fine grinding passes are adjusted based on a preset strategy according to the measured roughness.

Optionally, the method further comprises:

based on preset grinding parameters, when the roughness of the ground roller is smaller than the target roughness;

the traversing speed is increased by a preset percentage, and the grinding wheel is trimmed;

during rough grinding, the grinding pressure is adjusted according to the corresponding relation between the diameter of the grinding wheel and the grinding pressure;

in the fine grinding, a constant current gain value is increased to a preset range;

and when the third fine grinding step executes a third preset number of passes, the fine grinding passes are adjusted based on a preset strategy according to the measured roughness.

Optionally, the step of adjusting the grinding pressure according to the corresponding relationship between the diameter of the grinding wheel and the grinding pressure further includes:

during rough grinding, grinding pressure of a fourth preset number of passes positioned in front is adjusted according to the sequence, and the corresponding relation between the diameter of the grinding wheel and the grinding pressure is adjusted;

and (3) adjusting the grinding pressure of the rest grinding pass to a normal value, and increasing the preset traversing speed and the grinding wheel feeding amount.

Optionally, after the increasing the preset traverse speed and the grinding wheel feeding amount, the method further includes:

and when the intermediate grinding is carried out, the preset grinding wheel feeding amount and grinding pass are increased.

Optionally, the step of increasing the constant current gain value to a preset range further includes:

and adjusting constant current gain within a preset range according to the consumption of the grinding wheel.

Optionally, the method further comprises:

when the surface color of the grinding wheel is detected to be black, the transverse moving speed, the rotating speed of the grinding wheel and the feeding amount are adjusted.

Optionally, the method further comprises:

when the roller shape is detected to be not in accordance with the preset condition;

tracking and detecting current and roll shape data in the middle grinding process in real time;

and adjusting the constant current gain value and the traversing speed gain value until the roller shape reaches the preset requirement, and recovering the current gain value and the traversing speed gain value to normal values.

In a second aspect, there is provided a system for controlling roll roughness comprising a rough mill, a medium mill, a first fine mill, a second fine mill, a third fine mill, and measuring roll shape and roundness, said system further comprising:

the middle grinding module is used for grinding the roller according to the preset grinding parameters, and when the roughness of the ground roller is larger than the target roughness; grinding a first preset number of passes when the intermediate grinding is performed;

the PC value adjusting module is used for executing a fine grinding pass and returning the rest pass of the middle grinding execution grinding;

and the first fine grinding module is used for adjusting fine grinding passes based on a preset strategy according to the measured roughness when the third fine grinding step executes the second preset number of passes.

Optionally, the system further includes:

the finishing module is used for finishing the finishing module when the roughness of the ground roller is smaller than the target roughness based on preset grinding parameters; the traversing speed is increased by a preset percentage, and the grinding wheel is trimmed;

the rough grinding module is used for adjusting the grinding pressure according to the corresponding relation between the diameter of the grinding wheel and the grinding pressure during rough grinding;

the current adjusting module is used for improving the constant current gain value to a preset range in the fine grinding;

and the second fine grinding module is used for adjusting fine grinding passes based on a preset strategy according to the measured roughness when the third fine grinding step executes a third preset number of passes.

In a third aspect, there is provided an electronic apparatus including: the computer program comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the steps corresponding to the method in the first aspect when executing the computer program.

One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:

by utilizing historical data such as daily grinding parameters and the like, large data statistics are adopted to analyze the grinding parameters with different grinding wheel diameter ranges, so that the grinding quality can be ensured, and the grinding parameters close to the target roughness can be ensured, thereby ensuring that the roughness is accurately controlled, and avoiding other defects such as cutter lines, vibration lines, twills and the like. Then, aiming at the grinding characteristics of the rollers made of different materials, the existing grinding method is provided with adjusting parameters or process sequences in a targeted manner, so that the grinding efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a method of controlling roll roughness provided herein;

FIG. 2 is another flow chart of a method of controlling roll roughness provided herein;

FIG. 3 is a schematic view of a system for controlling roll roughness according to the present disclosure;

fig. 4 is a schematic structural diagram of an electronic device provided in the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, and not limited to the technical solutions of the present application, and the technical features in the embodiments and the embodiments of the present application may be combined with each other without conflict.

According to the method, the system and the equipment for controlling the roller roughness, the technical problem that the grinding efficiency is greatly affected due to the fact that no reference data are used for repeated regrinding in the adjustment of the grinding parameters in the prior art is solved, and the technical effect of improving the grinding efficiency under the condition that defects are not generated is achieved.

The technical scheme of the embodiment of the application aims to solve the technical problems, and the overall thought is as follows:

In an embodiment of the present application, there is provided a method for controlling roughness of a roll as shown in fig. 1, including rough grinding, intermediate grinding, first fine grinding, second fine grinding, third fine grinding, and measuring roll shape and roundness, the method including steps S101 to S103:

step S101, based on preset grinding parameters, when the roughness of the ground roller is larger than the target roughness; grinding a first preset number of passes when the intermediate grinding is performed;

firstly, for preset grinding parameters, the design adopts daily grinding parameters and historical data, adopts big data statistics to obtain grinding parameters which are based on different grinding wheel diameter ranges and can ensure grinding quality requirements and approximate to a target roughness range;

wherein, table 1 shows the parameter content when the diameter D of the grinding wheel is 680-750 mm, as follows:

wherein, table 2 shows the parameter content when the diameter D of the grinding wheel is 600-680 mm, as follows:

grinding program	Coarse grinding	Middle mill	First fine grinding	Second fine grinding	Third fine grinding
						Grinding wheel rotation speed m/s	25	19	14	14	13
Rotational speed of the roll rpm	38	50	50	55	60
						Transverse movement speed mm/min	2700	2100	1050	730	400
Continuous feed mm/min	0.02	0.01
						Pass of	14	7	3	2	3
Grinding pressure M%	14	5	3.3	2.5	1.3
						Constant current gain dB	0.15	0.15	0.14	0.14	0.12
Traversing speed gain dB	0.8	0.8

Wherein, table 3 shows the parameter content of the grinding wheel diameter D at 480-600 mm, as follows:

grinding program	Coarse grinding	Middle mill	First fine grinding	Second fine grinding	Third fine grinding
						Grinding wheel rotation speed m/s	25	20	15	14	13
Rotational speed of the roll rpm	38	50	55	60	65
						Transverse movement speed mm/min	2700	2100	1000	700	400
Continuous feed mm/min	0.02	0.01
						Pass of	14	8	3	3	3
Grinding pressure M%	10	4.5	2.5	1.8	0.8
						Constant current gain dB	0.1	0.1	0.12	0.11	0.11
Traversing speed gain dB	1	0.8

After table 1, table 2 and table 3 above are taken as reference data, there is still a different effect on the rolls of different materials, and most of the materials used for the rolls are Cr3 wrought steel, cr5 wrought steel and Cr6 wrought steel (wherein Cr3, cr5 and Cr6 wrought steel respectively represent wrought steel with different contents of chromium metal Cr); when grinding a Cr5 forged steel roller, the roller roughness ground by the same grinding parameters is higher, namely the roller roughness ground is larger than the target roughness, at the moment, 4 to 5 (first preset number) passes are firstly ground in the grinding process, and then the next fine grinding step is directly skipped.

Step S102, performing a fine grinding pass and returning to the pass left by the middle grinding;

it should be noted that, by inserting a fine grinding pass during the middle grinding process, the PC value (the number of roughness peaks in unit cm) of the roller surface is reduced, so that the roughness is instantaneously reduced during the subsequent fine grinding, and the cutting lines in the previous step can be covered, thereby avoiding defects. Wherein the remaining passes are typically set to 2 to 3 passes.

Step S103, when the third fine grinding step executes the second preset number of passes, fine grinding passes are adjusted based on a preset strategy according to the measured roughness.

It should be noted that, finally, after the last second pass of the third finish grinding step is completed, a pause is taken, the roughness is measured, and whether the finish grinding pass needs to be increased or decreased is determined according to the measured roughness. The preset strategy is selected according to the grinding degree of each pass of the third fine grinding, for example, an average value of the influence of a plurality of passes on the roughness is calculated, then a difference value between the roughness of the roller to be processed and the target roughness is calculated, and the difference value is divided by the average value to obtain the required pass.

Further, the method further comprises the steps of:

step S201, based on preset grinding parameters, when the roughness of the ground roller is smaller than the target roughness; the traversing speed is increased by a preset percentage, and the grinding wheel is trimmed;

it should be noted that, when the material of the roller is changed from the Cr5 forged steel material to the Cr5 forged steel material, the roughness of the roller is relatively low when the roller made of the Cr6 forged steel material is ground, i.e. the roughness of the roller is smaller than the target roughness; compared with Cr5 forged steel, the transverse moving speed is improved by 10% -15%, wherein the transverse moving speed of the Cr5 forged steel is generally 200mm/min. At the same time, when the grinding wheel is dressed, the rotating speed of the grinding wheel is reduced, so that the surface roughness of the grinding wheel is relatively increased during dressing, and thus, larger initial roughness is obtained during grinding.

Step S202, during rough grinding, the grinding pressure is adjusted according to the corresponding relation between the diameter of the grinding wheel and the grinding pressure;

it should be noted that, when grinding the roller made of Cr6 forged steel, in the rough grinding step, the specific adjustment mode is to adopt corresponding increase of grinding pressure according to different grinding wheel diameters in the previous 5 to 7 passes, the principle of the increase is that the larger the grinding wheel diameter is, the larger the pressure is, and the detailed increase data refer to table 1, table 2 and table 3; the purpose is to rapidly increase the PC value of the roller.

Step S203, in the fine grinding, the constant current gain value is increased to a preset range;

in the fine grinding step, the constant current gain value (default value is 0.1) is increased, and the three fine grinding constant current gain values are set to 0.18 to 0.2 when the grinding wheel is newly replaced.

Step S204, when the third preset number of passes is performed in the third finish grinding step, adjusting the finish grinding passes based on a preset strategy according to the measured roughness.

It should be noted that, the material of the ground Cr6 forged steel in the final stage is the same as that of the Cr5 forged steel, and the finish grinding process is stopped after the last pass in the third finish grinding step is completed, the roughness is measured, and whether the finish grinding process needs to be increased or decreased is determined according to the measured roughness. The preset strategy is selected according to the grinding degree of each pass of the third fine grinding, for example, an average value of the influence of a plurality of passes on the roughness is calculated, then a difference value between the roughness of the roller to be processed and the target roughness is calculated, and the difference value is divided by the average value to obtain the required pass.

The traverse speed is the traverse speed of the carriage (or carriage) of the grinding machine, i.e., the Z-axis traverse speed.

Further, the step of adjusting the grinding pressure according to the corresponding relation between the diameter of the grinding wheel and the grinding pressure further includes:

It should be noted that, during the first 5 to 7 passes, the grinding pressure is correspondingly increased according to different grinding wheel diameters, meanwhile, in order to avoid the occurrence of tool marks in the subsequent steps, the rough grinding pressure cannot exceed 22m%, the grinding pressure is adjusted to a normal value (about 17 m%) during the rest of the rough grinding passes, and meanwhile, the transverse moving speed and the feeding amount of the rough grinding are increased because the Cr5 material is required to be relatively reduced. It should be noted that the grinding pressure is theoretically a percentage of the grinding current and the grinding wheel load during grinding, and the unit is expressed by M%, that is, a percentage of the output torque of the grinding wheel motor during grinding, for example, the maximum torque of the motor is 100n×m, and when the grinding pressure parameter is set to 20, the unit represented by 20M% is twenty percent of the output torque.

Further, after the increasing the preset traverse speed and the grinding wheel feeding amount, the method further comprises:

In order to avoid the cutting lines in the subsequent step, the feeding amount and the grinding passes (less than or equal to 7 passes) are required to be increased in the step from rough grinding to grinding amount, so that the grinding quality can be ensured, and the roughness can be ensured not to be reduced beyond the requirement.

Further, the step of increasing the constant current gain value to a preset range further includes:

It should be noted that, when the targeted adjustment is made according to the consumption of the grinding wheel, the preset range is set to not lower than 0.14.

Further, the method further comprises the steps of:

It should be noted that, for the problem of uneven roughness, if the roughness occurs on the grinding wheel, the roughness is caused by uneven surface of the grinding wheel and dulled grinding wheel, and the color of the surface of the grinding wheel can be detected for judgment, and the specific adjustment mode is as follows: when finishing, according to the principle of 'two fast and one less and one slow', namely the transverse moving speed and the rotating speed of the grinding wheel are increased by a preset speed when the first few passes are compared with the original value, the feeding amount is reduced according to preset data when the last few passes are reduced, and the transverse moving speed is reduced, so that the effect of flattening and sharpness of the surface of the grinding wheel is achieved. Meanwhile, when the roughness of a roller ground after the grinding wheel is finished is relatively low, the rotating speed of the grinding wheel can be increased through the first several passes during rough grinding, abrasive particles can be quickly dropped off to ensure the self-sharpening property of the grinding wheel, and the same effect can be achieved, but if the air holes on the surface of the grinding wheel are seriously blocked, the surface flatness is obviously poor, and the grinding wheel is finished.

Further, the method further comprises the steps of:

and adjusting the constant current gain value and the Z-axis traversing speed gain value until the roll shape reaches the preset requirement, and recovering the current gain value and the traversing speed gain value to normal values.

It should be noted that, after the factors of the grinding wheel are discharged, if the roller shape of the grinding wheel still cannot meet the preset requirement, the roller shape has obvious wave crests and wave troughs (namely, the wave crests and wave troughs exceed the requirement), and when the accurate grinding procedure is operated, the grinding current is suddenly high and suddenly low, and finally the roughness is uneven. Thus the present embodiment adopts

Detecting the change of the current and the roller shape in the step from rough grinding to grinding, and increasing the constant current gain value and the traversing speed gain to achieve the purposes of reducing the traversing speed at the crest of the roller shape, increasing the current, increasing the traversing speed at the trough of the roller shape and reducing the current. The roll shape can be corrected only after a few passes (the correction mode can be used for detecting once after one pass is finished, and the subsequent steps are continued after the requirements are met), then the two values are adjusted back to normal values, the intermediate grinding step is continued, and then the step of measuring the roll shape and the roundness is carried out. Therefore, the roughness is ensured to be uniform, and the problem of chromatic aberration after chromium plating caused by non-uniformity of the roughness is avoided.

It should be noted that, for other rollers made of common materials (mainly Cr 3), since the grinding wheels are 5SG120 type and CXY120 type, the two grinding wheels are made of ceramic bond, the abrasive is white corundum, and the roughness of the type grinding wheel is low in variation range under different grinding wheel diameters when the roller made of the material is ground, the required grinding effect can be realized only by properly reducing the traversing speed and improving the rotating speed of the grinding wheel.

Based on the same inventive concept, an embodiment of the present application provides a system for controlling roughness of a roll, as shown in fig. 3, including rough grinding, intermediate grinding, first fine grinding, second fine grinding, third fine grinding, and measuring roll shape and roundness, where the system further includes:

the middle grinding module 301, based on preset grinding parameters, when the roughness of the ground roller is larger than the target roughness; grinding a first preset number of passes when the intermediate grinding is performed;

the PC value adjusting module 302 is configured to perform a fine grinding pass and return to the pass left by the middle grinding;

the first refining module 303 is configured to adjust the finish grinding pass based on a preset strategy according to the measured roughness when the second preset number of passes is performed in the third refining step.

Further, as shown in fig. 3, the above system further includes:

the dressing module 401, based on preset grinding parameters, when the roughness of the ground roller is smaller than the target roughness; the traversing speed is increased by a preset percentage, and the grinding wheel is trimmed;

a rough grinding module 402, configured to adjust a grinding pressure according to a correspondence between a grinding wheel diameter and the grinding pressure during rough grinding;

a current adjustment module 403, configured to increase the constant current gain value to a preset range during the fine grinding;

a second refining module 404 for adjusting the refined grinding pass based on a preset strategy according to the measured roughness when performing a third preset number of passes in the third refining step.

Based on the same inventive concept, as shown in fig. 4, the present embodiment provides an electronic device, including: the roll roughness control device comprises a memory 502, a processor 501 and a computer program stored in the memory 502 and capable of running on the processor 501, wherein the processor 501 realizes a roll roughness control method when executing the computer program.

It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A method of controlling roll roughness comprising rough grinding, intermediate grinding, first refining, second refining, third refining and measuring roll shape and roundness, the method further comprising:

grinding a first preset number of passes while the intermediate grinding is performed;

performing a fine grinding pass and returning to the pass left by the middle grinding;

and when the third fine grinding step executes the second preset number of passes, adjusting fine grinding passes based on a preset strategy according to the measured roughness.

2. The method of claim 1, wherein the method further comprises:

and when the third fine grinding step executes a third preset number of passes, adjusting fine grinding passes based on a preset strategy according to the measured roughness.

3. The method of claim 2, wherein the step of adjusting the grinding pressure according to the correspondence between the grinding wheel diameter and the grinding pressure further comprises:

4. The method of claim 3, further comprising, after said increasing the preset traverse speed and wheel feed:

5. The method of claim 3, wherein the step of increasing the constant current gain value to a predetermined range further comprises:

6. The method of any one of claims 1-5, wherein the method further comprises:

7. The method of any one of claims 1-5, wherein the method further comprises:

current and roll shape data in the middle grinding process are tracked and detected in real time;

8. A system for controlling roll roughness comprising a rough mill, a medium mill, a first fine mill, a second fine mill, a third fine mill, and measuring roll shape and roundness, the system further comprising:

the middle grinding module is used for grinding the roller according to the preset grinding parameters, and when the roughness of the ground roller is larger than the target roughness; grinding a first preset number of passes while the intermediate grinding is performed;

the PC value adjusting module is used for executing a fine grinding pass and returning to the pass left by the middle grinding execution grinding;

9. The system of claim 8, wherein the system further comprises:

10. An electronic device, the electronic device comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method steps of any one of claims 1 to 5 when the computer program is executed.