CN112139882B - Grinding method of pinch roll - Google Patents
Grinding method of pinch roll Download PDFInfo
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- CN112139882B CN112139882B CN202010942984.0A CN202010942984A CN112139882B CN 112139882 B CN112139882 B CN 112139882B CN 202010942984 A CN202010942984 A CN 202010942984A CN 112139882 B CN112139882 B CN 112139882B
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- grinding
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- pinch roll
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/37—Single-purpose machines or devices for grinding rolls, e.g. barrel-shaped rolls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/065—Steady rests
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/006—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the speed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The invention relates to a grinding method of a pinch roll, and belongs to the technical field of roll grinding. The technical scheme of the invention is as follows: according to the shape of the used pinch roll, the surface length of the roll changes after the roll is worn off each time, the surface length of the roll is measured by using a measuring tape, the Z-axis coordinate value of the starting point of the roll is found out by using a machine tool measuring arm, and a corresponding grinding program is compiled; and then, grinding technological parameters are optimized according to the actual grinding condition, so that the grinding precision taper of the pinch roll is ensured to be less than 0.03mm, the curve error is ensured to be less than 0.02mm, and the roundness is ensured to be less than 0.01 mm. The invention has the beneficial effects that: the field grinding of the pinch roll is completed by utilizing the field owned equipment to perform process programming and center frame adjustment and replacement, the taper of the pinch roll is ensured to be less than 0.03mm, the curve error is less than 0.02mm, and the roundness is less than 0.01mm, so that the use effect of the pinch roll is improved, the cost reduction task is completed, and the production quality is ensured.
Description
Technical Field
The invention relates to a grinding method of a pinch roll, and belongs to the technical field of roll grinding.
Background
The pinch roll used by the river steel bearing steel is subjected to outsourcing machining, and mainly comprises the steps of turning after surfacing, grinding and polishing, so that the process is complex, the cost is high, and great waste is caused. In addition, the pinch roll processed by outsourcing frequently has overlarge roll taper and ultra-poor roundness in the use process, so that the production quality of the factory is seriously influenced due to the poor roll shape of the plate strip.
A universal grinder is arranged in the preparation working area, the pinch roll can be ground by replacing the center frame, but only a few grinding experiences support in the aspects of grinding procedures and process parameters, and grinding operation is not practiced. But the pinch roll grinding can be realized under the conditions of the functions of grinding machine equipment, field hardware supporting facilities and theoretical requirements.
Disclosure of Invention
The invention aims to provide a grinding method of a pinch roll, which finishes the on-site grinding of the pinch roll by utilizing equipment owned on site to carry out process programming and center frame adjustment and replacement, ensures that the taper of the pinch roll is less than 0.03mm, the curve error is less than 0.02mm and the roundness is less than 0.01mm, thereby improving the use effect of the pinch roll, finishing the cost-reducing task, ensuring the production quality and effectively solving the problems in the background technology.
The technical scheme of the invention is as follows: a method of grinding a pinch roll, comprising the steps of:
s1, replacing the center frame: replacing a headstock transmission device and a center frame used for grinding supporting rollers with a headstock transmission device and a center frame used for grinding pinch rollers;
s2, compiling a roller grinding program: firstly, according to the requirements of the length, the diameter and the curve of the roller, a roller grinding curve is compiled to be a flat roller without convexity requirement; secondly, programming a processing program, building a new program name, inserting roller centering, cutter feeding, rough grinding to grinding amount, rough grinding to error, polishing, diameter measurement, roundness measurement and program ending in the program in sequence, clamping the surface of the roller by using a measuring arm after the roller is installed, manually adjusting the edge of the roller to take a Z-axis position coordinate, and inputting the Z-axis position coordinate into a roller centering and grinding point in the grinding program; thirdly, creating a new machining program name, selecting and storing a corresponding machining program and a curve program;
s3, grinding operation: measuring the surface of the roller by using a measuring tape before grinding, inputting the actual length of the roller into the programming process parameters of the roller, and ensuring that the surface of the roller is ground each time to meet the requirements of a grinding curve; in the grinding process, because the grinding starting point is not changed, the position of the grinding wheel when the grinding wheel travels to the edge of the roller needs to be observed, grinding process parameters are optimized, and the surface of the roller is guaranteed to be normally ground; the Z-axis gain in the grinding process is optimized, so that the Z-axis is automatically slowed down to increase the grinding efficiency during high-point grinding of the surface of the roller, and the curve of the surface of the roller can be quickly ground in a range.
In the step S2, two ends and three points in the middle are taken according to the length of the roller for measurement and detection, and the offset of the roller is 50mm input in the grinding process parameters after cutting, and the offset of 50mm can ensure that the edge part of the grinding roller surface ground by the grinding wheel is fully covered because the width of the grinding wheel used on site is 100 mm.
In step S3, the specific grinding process parameters are optimized as follows:
firstly, when the rough grinding is adjusted to the grinding amount, the rotating speed of a grinding wheel is 35M/S, the rotating speed of a roller is 32 r/min, the speed of a supporting plate is 3000MM/min, the continuous feeding is 0.03MM/min, the grinding gain amount of a Z axis is adjusted to 1%, and the requirement of 1MM for the rough grinding can be quickly met;
adjusting the rotating speed of the grinding wheel to be 32-25M/s when the rough grinding is carried out to the tolerance, reducing the rotating speed of the roller to be 30 r/min, reducing the speed of the supporting plate to be 2400 plus 800MM/min, continuously feeding, gradually reducing the speed to be 0.03-0.01MM/min, reducing the grinding gain of the Z axis to be 0.3 percent, and ensuring that the rough grinding tool mark is eliminated and the curve error requirement is within 0.02 MM;
and thirdly, controlling the grinding current in the process of polishing to be 20A, reducing the rotating speed of the grinding wheel to 25M/s after the diameter of the grinding wheel is reduced, adjusting the rotating speed of the roller to be 30 r/min, reducing the speed of the supporting plate to 800MM/min, and continuously feeding the roller at 0.005MM/min to finish grinding and ensure the surface precision of the roller.
The invention has the beneficial effects that: the field grinding of the pinch roll is completed by utilizing the field owned equipment to perform process programming and center frame adjustment and replacement, the taper of the pinch roll is ensured to be less than 0.03mm, the curve error is less than 0.02mm, and the roundness is less than 0.01mm, so that the use effect of the pinch roll is improved, the cost reduction task is completed, and the production quality is ensured.
Drawings
FIG. 1 is a schematic view of an original grinding backup roll device;
FIG. 2 is a schematic view of the grinding pinch roll apparatus of the present invention;
in the figure: the grinding support roll uses a headstock transmission device, a support roll, a center frame device of the grinding support roll, a pinch roll, a headstock transmission device for the grinding pinch roll and a center frame device of the grinding pinch roll.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the drawings of the embodiments, and it is obvious that the described embodiments are a small part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
A method of grinding a pinch roll, comprising the steps of:
s1, replacing the center frame: replacing a headstock transmission device and a center frame used for grinding supporting rollers with a headstock transmission device and a center frame used for grinding pinch rollers;
s2, compiling a roller grinding program: firstly, according to the requirements of the length, the diameter and the curve of the roller, a roller grinding curve is compiled to be a flat roller without convexity requirement; secondly, programming a processing program, building a new program name, inserting roller centering, cutter feeding, rough grinding to grinding amount, rough grinding to error, polishing, diameter measurement, roundness measurement and program ending in the program in sequence, clamping the surface of the roller by using a measuring arm after the roller is installed, manually adjusting the edge of the roller to take a Z-axis position coordinate, and inputting the Z-axis position coordinate into a roller centering and grinding point in the grinding program; thirdly, creating a new machining program name, selecting and storing a corresponding machining program and a curve program;
s3, grinding operation: measuring the surface of the roller by using a measuring tape before grinding, inputting the actual length of the roller into the programming process parameters of the roller, and ensuring that the surface of the roller is ground each time to meet the requirements of a grinding curve; in the grinding process, because the grinding starting point is not changed, the position of the grinding wheel when the grinding wheel travels to the edge of the roller needs to be observed, grinding process parameters are optimized, and the surface of the roller is guaranteed to be normally ground; the Z-axis gain in the grinding process is optimized, so that the Z-axis is automatically slowed down to increase the grinding efficiency during high-point grinding of the surface of the roller, and the curve of the surface of the roller can be quickly ground in a range.
In the step S2, two ends and three points in the middle are taken according to the length of the roller for measurement and detection, and the offset of the roller is 50mm input in the grinding process parameters after cutting, and the offset of 50mm can ensure that the edge part of the grinding roller surface ground by the grinding wheel is fully covered because the width of the grinding wheel used on site is 100 mm.
In step S3, the specific grinding process parameters are optimized as follows:
firstly, when the rough grinding is adjusted to the grinding amount, the rotating speed of a grinding wheel is 35M/S, the rotating speed of a roller is 32 r/min, the speed of a supporting plate is 3000MM/min, the continuous feeding is 0.03MM/min, the grinding gain amount of a Z axis is adjusted to 1%, and the requirement of 1MM for the rough grinding can be quickly met;
adjusting the rotating speed of the grinding wheel to be 32-25M/s when the rough grinding is carried out to the tolerance, reducing the rotating speed of the roller to be 30 r/min, reducing the speed of the supporting plate to be 2400 plus 800MM/min, continuously feeding, gradually reducing the speed to be 0.03-0.01MM/min, reducing the grinding gain of the Z axis to be 0.3 percent, and ensuring that the rough grinding tool mark is eliminated and the curve error requirement is within 0.02 MM;
and thirdly, controlling the grinding current in the process of polishing to be 20A, reducing the rotating speed of the grinding wheel to 25M/s after the diameter of the grinding wheel is reduced, adjusting the rotating speed of the roller to be 30 r/min, reducing the speed of the supporting plate to 800MM/min, and continuously feeding the roller at 0.005MM/min to finish grinding and ensure the surface precision of the roller.
In practical application, 1, replacing the center frame:
and (3) operating the crown block to lift the supporting roll in the figure 1 away, lifting the grinding supporting roll away by using a headstock transmission device, replacing the grinding pinch roll in the figure 2 by using a headstock transmission device, lifting a central frame device of the grinding supporting roll in the figure 1 away, replacing the central frame device of the grinding pinch roll in the figure 2 by using a central frame device of the grinding pinch roll in the figure 2, and lifting the pinch roll in the figure 2 to a machine tool.
2. Compiling a roller grinding program:
firstly, according to the requirements of the length, the diameter and the curve of the roller, the grinding curve of the roller is compiled to be a flat roller without convexity requirement.
And secondly, programming a processing program, building a new program name, inserting roller centering, cutter feeding, rough grinding to grinding amount, rough grinding to error, polishing, diameter measurement, roundness measurement and program termination into the program in sequence. After the roller is installed, the surface of the roller is clamped by a measuring arm, the Z-axis position coordinate of the edge of the roller is manually adjusted, and the roller is input to a centering grinding point in a grinding program. Measuring and detecting two ends and the middle three points according to the length of the roller, inputting the offset of the roller into grinding process parameters after cutting, wherein the width of a grinding wheel used on site is 100mm, so that the 50mm offset can ensure that the grinding wheel can fully cover the surface edge of the roller ground by the grinding wheel.
And thirdly, creating a new machining program name, selecting and storing the corresponding machining program and curve program.
3. Grinding operation skill:
before grinding, the surface of the roller is measured by using a measuring tape, the actual length of the roller is obtained and input into the programming process parameters of the roller, and the condition that the surface of the roller is ground every time meets the requirements of a grinding curve is ensured.
Since the grinding starting point is not changed during grinding, the position of the grinding wheel when the grinding wheel travels to the edge of the roll is observed during grinding, for example: when the grinding wheel is not ground by 20mm in difference during grinding walking to the side of the grinding head frame, the grinding process parameters are optimized to reduce the deviation of the side of the grinding head frame by 20 to 30mm, so that the surface of the roller is guaranteed to be normally ground.
The Z-axis gain in the grinding process is optimized, so that the Z-axis is automatically slowed down to increase the grinding efficiency during high-point grinding of the surface of the roller, and the curve of the surface of the roller can be quickly ground in a range.
The specific grinding process parameters are optimized as follows:
firstly, when the rough grinding is adjusted to the grinding amount, the rotating speed of a grinding wheel is 35M/S, the rotating speed of a roller is 32 r/min, the speed of a supporting plate is 3000MM/min, the continuous feeding is 0.03MM/min, the grinding gain amount of a Z axis is adjusted to 1%, and the requirement of 1MM can be met quickly by the rough grinding.
Adjusting the rotating speed of the grinding wheel to be 32-25M/s when the rough grinding is carried out to the tolerance, reducing the rotating speed of the roller to be 30 r/min, reducing the speed of the supporting plate to be 2400 plus 800MM/min, continuously feeding, gradually reducing the speed to be 0.03-0.01MM/min, reducing the grinding gain of the Z axis to be 0.3 percent, and ensuring that the rough grinding tool mark is eliminated and the curve error requirement is met within 0.02MM
And thirdly, controlling the grinding current in the polishing process to be 20A, reducing the rotating speed of the grinding wheel to 25M/s after the diameter of the grinding wheel is reduced, adjusting the rotating speed of the roller to be 30 r/min, reducing the speed of the supporting plate to 800MM/min, and continuously feeding the roller at 0.005MM/min, thereby finishing grinding and ensuring the surface precision of the roller.
The grinding method of the pinch roll has good effect in the successful application of the preparation of steel rolling on a river steel bearing steel 1780 production line, can be popularized to other roll grinding units in the same industry, ensures the grinding precision of the pinch roll, improves the use effect of the pinch roll and ensures the normal shape of a strip steel coil.
Claims (1)
1. A method for grinding a pinch roll is characterized by comprising the following steps:
s1, replacing the center frame: replacing a headstock transmission device and a center frame used for grinding supporting rollers with a headstock transmission device and a center frame used for grinding pinch rollers;
s2, compiling a roller grinding program: firstly, according to the requirements of the length, the diameter and the curve of the roller, a roller grinding curve is compiled to be a flat roller without convexity requirement; secondly, programming a processing program, building a new program name, inserting roller centering, cutter feeding, rough grinding to grinding amount, rough grinding to error, polishing, diameter measurement, roundness measurement and program ending in the program in sequence, clamping the surface of the roller by using a measuring arm after the roller is installed, manually adjusting the edge of the roller to take a Z-axis position coordinate, and inputting the Z-axis position coordinate into a roller centering and grinding point in the grinding program; thirdly, creating a new machining program name, selecting and storing a corresponding machining program and a curve program;
s3, grinding operation: measuring the surface of the roller by using a measuring tape before grinding, inputting the actual length of the roller into the programming process parameters of the roller, and ensuring that the surface of the roller is ground each time to meet the requirements of a grinding curve; in the grinding process, because the grinding starting point is not changed, the position of the grinding wheel when the grinding wheel travels to the edge of the roller needs to be observed, grinding process parameters are optimized, and the surface of the roller is guaranteed to be normally ground; the Z-axis gain in the grinding process is optimized, so that the Z-axis is automatically slowed down to increase the grinding efficiency during high-point grinding of the surface of the roller, and the curve of the surface of the roller can be quickly ground in a range;
in the step S2, two ends and three points in the middle are taken according to the length of the roller for measurement and detection, and the offset of the roller is input into grinding process parameters after cutting, and the offset of 50mm can ensure that the edge part of the grinding roller surface of the grinding wheel is completely covered because the width of the grinding wheel used on site is 100 mm;
in step S3, the specific grinding process parameters are optimized as follows:
firstly, when the rough grinding is adjusted to the grinding amount, the rotating speed of a grinding wheel is 35M/S, the rotating speed of a roller is 32 r/min, the speed of a supporting plate is 3000MM/min, the continuous feeding is 0.03MM/min, the grinding gain amount of a Z axis is adjusted to 1%, and the requirement of 1MM for the rough grinding can be quickly met;
adjusting the rotating speed of the grinding wheel to be 32-25M/s when the rough grinding is carried out to the tolerance, reducing the rotating speed of the roller to be 30 r/min, reducing the speed of the supporting plate to be 2400 plus 800MM/min, continuously feeding, gradually reducing the speed to be 0.03-0.01MM/min, reducing the grinding gain of the Z axis to be 0.3 percent, and ensuring that the rough grinding tool mark is eliminated and the curve error requirement is within 0.02 MM;
and thirdly, controlling the grinding current in the process of polishing to be 20A, reducing the rotating speed of the grinding wheel to 25M/s after the diameter of the grinding wheel is reduced, adjusting the rotating speed of the roller to be 30 r/min, reducing the speed of the supporting plate to 800MM/min, and continuously feeding the roller at 0.005MM/min to finish grinding and ensure the surface precision of the roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010942984.0A CN112139882B (en) | 2020-09-09 | 2020-09-09 | Grinding method of pinch roll |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010942984.0A CN112139882B (en) | 2020-09-09 | 2020-09-09 | Grinding method of pinch roll |
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| CN112139882A CN112139882A (en) | 2020-12-29 |
| CN112139882B true CN112139882B (en) | 2022-03-01 |
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| CN113732844A (en) * | 2021-08-09 | 2021-12-03 | 武汉钢铁有限公司 | Method and device for grinding work roll |
| CN114130827B (en) * | 2021-10-27 | 2024-02-13 | 江苏沙钢集团有限公司 | Method for preventing periodic knots from being generated on surface of high-speed wire rod |
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| CN110340149A (en) * | 2019-07-19 | 2019-10-18 | 首钢京唐钢铁联合有限责任公司 | Roll and its method for grinding |
| CN209551468U (en) * | 2018-12-24 | 2019-10-29 | 鞍钢股份有限公司 | It is a kind of for being ground the bracket of pinch roller |
| CN108788941B (en) * | 2018-07-06 | 2020-10-02 | 攀钢集团西昌钢钒有限公司 | Grinding method of CVC roller |
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2020
- 2020-09-09 CN CN202010942984.0A patent/CN112139882B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102390035A (en) * | 2011-12-06 | 2012-03-28 | 上海理工大学 | Workpiece center supporting frame of numerical control tool grinder |
| CN102581712A (en) * | 2012-03-27 | 2012-07-18 | 首钢总公司 | Method for grinding plain roll from plain profile into CVC (continuous variable crown) profile |
| CN102689243A (en) * | 2012-06-13 | 2012-09-26 | 鞍钢股份有限公司 | Method for grinding furnace roller |
| CN103231289A (en) * | 2013-05-21 | 2013-08-07 | 唐山瑞丰钢铁（集团）有限公司 | Grinding method for controlling roughness of surfaces of different rollers |
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