Method of grinding an intermediate roll

Abstract

The application discloses a grinding method of an intermediate roller. The method is suitable for the field of steel rolling technology, and comprises the following steps: coarsely grinding the intermediate roller to obtain a coarsely ground roller; semi-finely grinding the coarsely ground roller to obtain a semi-finely ground roller; finely grinding the semi-finely ground roller to obtain a finely ground roller; and chamfering the finely ground roller to complete the grinding of the intermediate roller. The grinding efficiency can be ensured, the grinding wheel does not need to be trimmed during the grinding process of the intermediate roller, and the part of the grinding wheel surface in contact with the intermediate roller can be kept flat during the grinding process of the intermediate roller, so that the grinding quality of the intermediate roller is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of rolling steel, and particularly relates to a grinding method of an intermediate roll. BACKGROUND

[0002] When grinding the intermediate roll of the existing acid-rolling mill set, the grinding process includes leveling, tool setting, rough grinding, semi-fine grinding, chamfering semi-fine grinding, fine grinding, roll shape measurement, roundness measurement, and eddy current flaw detection, etc. After chamfering semi-fine grinding of the intermediate roll, the surface of the grinding wheel is uneven, which affects the grinding quality of the subsequent steps and leads to low grinding quality. SUMMARY

[0003] The application aims to at least solve the technical problem of low grinding quality caused by the grinding method of the intermediate roll in the prior art. To this end, the application provides a grinding method of an intermediate roll.

[0004] The technical scheme of the application is as follows:

[0005] The application provides a grinding method of an intermediate roll, which comprises the following steps:

[0006] Rough grinding the intermediate roll to obtain a rough ground roll;

[0007] Semi-fine grinding the rough ground roll to obtain a semi-fine ground roll;

[0008] Fine grinding the semi-fine ground roll to obtain a fine ground roll;

[0009] Chamfering semi-fine grinding the fine ground roll to complete the grinding of the intermediate roll.

[0010] Further, in the chamfering semi-fine grinding, the Z-axis moving speed of the grinding machine is 300 mm / min to 320 mm / min, the rotating speed of the grinding wheel of the grinding machine is 26 m / s to 30 m / s, the rotating speed of the intermediate roll is 50 rpm to 55 rpm, and the grinding current of the grinding machine is 5 A to 6 A.

[0011] Further, in the rough grinding, the Z-axis moving speed of the grinding machine is 2500 mm / min to 3000 mm / min, the rotating speed of the grinding wheel is 24 m / s to 30 m / s, the rotating speed of the intermediate roll is 38 rpm to 40 rpm, the feeding amount of the grinding wheel is 0.02 mm / min to 0.04 mm / min, and the grinding current of the grinding machine is 25 A to 30 A.

[0012] Further, the semi-fine grinding process comprises first semi-fine grinding sub-process, second semi-fine grinding sub-process and third semi-fine grinding sub-process performed in sequence, and the fine grinding process comprises first fine grinding sub-process and second fine grinding sub-process performed in sequence.

[0013] Further, in the first semi-finishing grinding sub-process, the Z-axis moving speed of the grinding machine is 1800mm / min-2000mm / min, the rotating speed of the grinding wheel is 18m / s-20m / s, the rotating speed of the intermediate roller is 40rpm-44rpm, the feeding amount of the grinding wheel is 0.007mm / min-0.008mm / min, and the grinding current of the grinding machine is 18A-25A.

[0014] Further, in the second semi-finishing grinding sub-process, the Z-axis moving speed of the grinding machine is 1400mm / min-1600mm / min, the rotating speed of the grinding wheel is 16m / s-18m / s, the rotating speed of the intermediate roller is 44rpm-48rpm, the feeding amount of the grinding wheel is 0.004mm / min-0.006mm / min, and the grinding current of the grinding machine is 14A-18A.

[0015] Further, in the third semi-finishing grinding sub-process, the Z-axis moving speed of the grinding machine is 1000mm / min-1200mm / min, the rotating speed of the grinding wheel is 14m / s-16m / s, the rotating speed of the intermediate roller is 48rpm-52rpm, the feeding amount of the grinding wheel is 0.002mm / min-0.004mm / min, and the grinding current of the grinding machine is 10A-14A.

[0016] Further, in the first semi-finishing grinding sub-process, the Z-axis moving speed of the grinding machine is 1800mm / min-2000mm / min, the rotating speed of the grinding wheel is 18m / s-20m / s, the rotating speed of the intermediate roller is 40rpm-44rpm, the feeding amount of the grinding wheel is 0.007mm / min-0.008mm / min, and the grinding current of the grinding machine is 18A-25A.

[0017] Further, in the second semi-finishing grinding sub-process, the Z-axis moving speed of the grinding machine is 1400mm / min-1600mm / min, the rotating speed of the grinding wheel is 16m / s-18m / s, the rotating speed of the intermediate roller is 44rpm-48rpm, the feeding amount of the grinding wheel is 0.004mm / min-0.006mm / min, and the grinding current of the grinding machine is 14A-18A.

[0018] Further, the grinding wheel is a resin grinding wheel with a particle size of 46#.

[0019] The embodiments of the present application have at least the following beneficial effects:

[0020] The grinding method of the intermediate roller provided in the application is used for sequentially performing rough grinding, semi-fine grinding, fine grinding and chamfer semi-fine grinding on the intermediate roller, so as to complete the grinding of the intermediate roller. When the intermediate roller is sequentially subjected to rough grinding, semi-fine grinding and fine grinding, the entire wheel surface of the grinding wheel is in contact with the intermediate roller. When the intermediate roller is subjected to chamfer semi-fine grinding, part of the wheel surface of the grinding wheel is in contact with the intermediate roller. After the chamfer semi-fine grinding is completed, the wheel surface of the grinding wheel is uneven. When the method is applied to the grinding process of the intermediate roller, on the one hand, the grinding efficiency can be ensured, and the grinding wheel does not need to be trimmed in the grinding process of the intermediate roller. On the other hand, the part of the wheel surface of the grinding wheel in contact with the intermediate roller can always remain flat in the grinding process of the intermediate roller, so that the grinding quality of the intermediate roller is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings described in the following are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 The flowchart of the grinding method of the intermediate roller of the embodiment of the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] In addition, the reference numbers and / or reference letters can be repeated in different examples in the present application. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0025] The present application will be described in the following with reference to the drawings and specific embodiments:

[0026] Figure 1 The flowchart of the grinding method of the intermediate roller of the embodiment of the present application. The present application provides a grinding method of an intermediate roller, which is combined with Figure 1 The method comprises the following steps:

[0027] S1: rough grinding is performed on the intermediate roller to obtain a rough ground roller;

[0028] As an embodiment of the present application, in the rough grinding in step S1: the Z-axis moving speed of the grinding machine is 2500mm / min-3000mm / min, the rotating speed of the grinding wheel is 24m / s-30m / s, the rotating speed of the intermediate roller is 38rpm-40rpm, the feeding amount of the grinding wheel is 0.02m / min-0.04mm / min, and the grinding current of the grinding machine is 25A-30A.

[0029] The parameters of the rough grinding in the prior art are: the Z-axis moving speed of the grinding machine is 3000mm / min-3300mm / min, the rotating speed of the grinding wheel is 24m / s-30m / s, the rotating speed of the intermediate roller is 38rpm-40rpm, the feeding amount of the grinding wheel is 0.02m / min-0.04mm / min, and the grinding current of the grinding machine is 30A-35A.

[0030] In the rough grinding, the purpose of controlling the Z-axis moving speed of the grinding machine is to reduce the interval width of the spiral lines generated in the rough grinding process. If the Z-axis moving speed of the grinding machine is too high, the interval of the spiral lines will be too wide, thereby affecting the grinding quality of the subsequent semi-finishing and finishing. The purpose of controlling the grinding current of the grinding machine is to control the roughness after the rough grinding. If the current is too large, the roughness of the intermediate roller after the grinding will be too high. If the current is too small, the roughness of the intermediate roller after the grinding will be too low.

[0031] In the embodiment of the present application, before the rough grinding of the intermediate roller, the intermediate roller can be leveled and the grinding wheel can be indexed. The intermediate roller is leveled so that the central axis of the intermediate roller is collinear with the center line of the grinding machine. As an embodiment of the present application, the U1 shaft can be used to adjust the height of the towa of the tailstock side tile to automatically level the intermediate roller, so that the central axis of the intermediate roller is collinear with the center line of the grinding machine, thereby reducing the vibration of the intermediate roller in the grinding process. The grinding wheel is indexed so that the indexing point is coincident with the tool position point. As an embodiment of the present application, the automatic indexing method of the grinding wheel can be used to index the grinding wheel according to the set indexing position and indexing current value, so that the indexing point is coincident with the tool position point.

[0032] S2: semi-finishing the rough grinding roller to obtain a semi-finishing roller;

[0033] As an embodiment of the present application, the semi-finishing includes sequentially performed first, second and third semi-finishing sub-processes. The sub-processes are used to better control the spiral lines and roughness of the intermediate roller. Compared with the prior art, the prior art uses twice semi-finishing, and the chamfer is located between the twice semi-finishing. The semi-finishing after the chamfer includes three semi-finishing sub-processes.

[0034] In the first half-precision grinding sub-process, the Z-axis moving speed of the grinder is 1800mm / min-2000mm / min, the rotating speed of the grinding wheel is 18m / s-20m / s, the rotating speed of the intermediate roller is 40rpm-44rpm, the feeding amount of the grinding wheel is 0.007mm / min-0.008mm / min, and the grinding current of the grinder is 18A-25A.

[0035] In the second half-precision grinding sub-process, the Z-axis moving speed of the grinder is 1400mm / min-1600mm / min, the rotating speed of the grinding wheel is 16m / s-18m / s, the rotating speed of the intermediate roller is 44rpm-48rpm, the feeding amount of the grinding wheel is 0.004mm / min-0.006mm / min, and the grinding current of the grinder is 14A-18A.

[0036] In the third half-precision grinding sub-process, the Z-axis moving speed of the grinder is 1000mm / min-1200mm / min, the rotating speed of the grinding wheel is 14m / s-16m / s, the rotating speed of the intermediate roller is 48rpm-52rpm, the feeding amount of the grinding wheel is 0.002mm / min-0.004mm / min, and the grinding current of the grinder is 10A-14A.

[0037] The parameters of the third half-precision grinding sub-process after chamfering in the prior art are basically the same as the parameters of the first half-precision grinding sub-process, the second half-precision grinding sub-process and the third half-precision grinding sub-process in the present application.

[0038] In the embodiment of the present application, the grinding amount of the rough grinding roller can be measured between the step S1 and the step S2. As an embodiment of the present application, the measuring arm can be used to measure the grinding amount of the intermediate roller after rough grinding, so that the diameter difference of the rollers can be within the pairing range when the rollers are paired.

[0039] S3: precision grinding the half-precision grinding roller to obtain a precision grinding roller;

[0040] As an embodiment of the present application, the precision grinding includes a first precision grinding sub-process and a second precision grinding sub-process in sequence, so that the roughness of the intermediate roller can be better controlled by the sub-processes, and the precision grinding in the prior art also includes twice precision grinding sub-processes.

[0041] In the first precision grinding sub-process, the Z-axis moving speed of the grinder is 800mm / min-900mm / min, the rotating speed of the grinding wheel is 12m / s-14m / s, the rotating speed of the intermediate roller is 50rpm-55rpm, the feeding amount of the grinding wheel is 0mm / min, and the grinding current of the grinder is 7A-8A.

[0042] In the second fine grinding sub-process, the Z-axis moving speed of the grinding machine is 800mm / min-900mm / min, the speed of the grinding wheel is 10m / s-12m / s, the speed of the intermediate roller is 55rpm-60rpm, the feeding amount of the grinding wheel is 0mm / min, and the grinding current of the grinding machine is 6A-7A.

[0043] The parameters of the twice fine grinding sub-process in the prior art are basically the same as the parameters of the first fine grinding sub-process and the second fine grinding sub-process in the present application.

[0044] S4: chamfering semi-fine grinding is performed on the fine grinding roller to complete the grinding of the intermediate roller;

[0045] As an embodiment of the present application, when the intermediate roller is chamfered and semi-finely ground by the grinding machine, the Z-axis moving speed of the grinding machine is 300mm / min-320mm / min, the speed of the grinding wheel is 26m / s-30m / s, the speed of the intermediate roller is 50rpm-55rpm, the feeding amount of the grinding wheel is 0mm / min, and the grinding current of the grinding machine is 5A-6A. In this way, the roughness of the chamfered intermediate roller can reach 0.85μm-0.95μm, which meets the requirement that the roughness of the chamfered intermediate roller is close to the roughness of the surface of the intermediate roller (0.8μm-1.0μm).

[0046] In the prior art, the parameters of the chamfering semi-fine grinding are as follows: the Z-axis moving speed of the grinding machine is 200mm / min-250mm / min, the speed of the grinding wheel is 20m / s-24m / s, the speed of the intermediate roller is 60rpm-68rpm, the feeding amount of the grinding wheel is 0mm / min, and the grinding current of the grinding machine is 10A-15A. In this way, the roughness of the chamfered intermediate roller can reach 0.7μm-0.9μm, which also meets the requirement that the roughness of the chamfered intermediate roller is close to the roughness of the surface of the intermediate roller (0.8μm-1.0μm).

[0047] In the present application and the prior art, although different processing procedures are adopted, the roughness of the surface of the intermediate roller in the present application and the roughness of the surface of the intermediate roller in the prior art can both meet the requirements. In addition, the grinding time interval in the present application is 40min-50min, the grinding time interval in the prior art is 50min-60min, and the present application has a shorter grinding time. Furthermore, in the prior art, after the intermediate roller is chamfered and semi-finely ground, the surface of the grinding wheel becomes uneven, which affects the grinding quality of the subsequent steps and leads to a low grinding quality. In order to solve this problem, the grinding wheel is currently repaired, and the subsequent steps are performed after the grinding wheel is repaired, which increases the grinding time.

[0048] But the moving speed of the pallet will affect the overall grinding time of the intermediate roller, the moving speed of the pallet in the embodiment of the application is higher than that in the prior art, which can shorten the overall grinding time of the intermediate roller. Moreover, the speed ratio of the grinding wheel and the intermediate roller in the prior art will cause diagonal lines in the transition area between the chamfer and the surface of the intermediate roller. Compared with the prior art, the speed ratio of the grinding wheel and the intermediate roller in the embodiment of the application can reduce the diagonal lines in the transition area between the chamfer and the surface of the intermediate roller. Furthermore, the grinding current in the prior art is too high, which will cause the roughness of the intermediate roller after grinding to be too high. Compared with the prior art, the grinding current in the embodiment of the application is lower, which can reduce the roughness of the chamfer.

[0049] In the chamfer semi-finishing grinding, the purpose of controlling the Z-axis moving speed of the grinding machine is to control the chamfer roughness and the grinding time. If the Z-axis moving speed of the grinding machine is too high, the chamfer roughness will be too high. If the speed is too low, the grinding time will be too long. The purpose of controlling the speed of the grinding wheel is to control the chamfer roughness. If the speed of the grinding wheel is too high, diagonal lines will be formed in the transition area between the surface of the intermediate roller and the chamfer. The purpose of controlling the speed of the intermediate roller is also to control the chamfer roughness. If the speed of the intermediate roller is too high, diagonal lines will also be formed in the transition area between the surface of the intermediate roller and the chamfer. The purpose of controlling the grinding current of the grinding machine is still to control the chamfer roughness. If the current is too large, the roughness of the chamfer of the intermediate roller after grinding will be too high. If the current is too small, the roughness of the chamfer of the intermediate roller after grinding will be too low.

[0050] In the embodiment of the application, the grinding processing curve of the chamfer of the intermediate roller can be divided into a plurality of grinding sections along one end to the other end of the intermediate axis, for example: sequentially divided into a first grinding section to a thirteenth grinding section, a total of 13 grinding sections, wherein the first grinding section to the twelfth grinding section each accounts for one fifteenth, and the thirteenth grinding section accounts for three fifteenths. The moving speed of the grinding wheel in the first grinding section to the eleventh grinding section is 7% of the Z-axis speed, and the moving speed of the grinding wheel in the twelfth grinding section to the thirteenth grinding section is 100% of the Z-axis speed. In the prior art, the grinding processing curve of the chamfer of the intermediate roller is divided into three grinding sections: a first grinding section, a second grinding section, and a third grinding section, wherein the first grinding section, the second grinding section, and the third grinding section each account for one third. The moving speed of the grinding wheel in the first grinding section and the second grinding section is 5% of the Z-axis speed, and the moving speed of the grinding wheel in the third grinding section is 100% of the Z-axis speed. The different reasons for the segmentation method (13 sections) in the application and the segmentation method (3 sections) in the prior art are to better control the chamfer grinding curve and improve the grinding quality. Moreover, the chamfer speed can be improved by the setting method of the application compared with the prior art, which is to better control the grinding time and reduce the chamfer grinding time.

[0051] In the embodiment of the present application, after step S4, the grinding amount and roundness of the intermediate roller after grinding can be measured, and the intermediate roller after grinding can be eddy current tested. As an embodiment of the present application, the grinding amount of the intermediate roller after grinding and the roundness of the intermediate roller can be measured by a measuring arm, and the intermediate roller can be eddy current tested.

[0052] In summary, in the intermediate roller grinding method of the embodiment of the present application, the intermediate roller is sequentially subjected to rough grinding, semi-finish grinding, finish grinding and chamfer semi-finish grinding by the method, so as to complete the grinding of the intermediate roller. When the intermediate roller is sequentially subjected to rough grinding, semi-finish grinding and finish grinding, the entire wheel surface of the grinding wheel is in contact with the intermediate roller, and when the intermediate roller is subjected to chamfer semi-finish grinding, part of the wheel surface of the grinding wheel is in contact with the intermediate roller. After the chamfer semi-finish grinding is completed, the wheel surface of the grinding wheel is uneven. Therefore, when the method is applied to the grinding process of the intermediate roller, on the one hand, the grinding efficiency can be ensured, and the grinding wheel does not need to be trimmed during the grinding process of the intermediate roller, and on the other hand, the part of the wheel surface of the grinding wheel in contact with the intermediate roller during the grinding process of the intermediate roller is always kept flat, so as to improve the grinding quality of the intermediate roller.

[0053] In the embodiment of the present application, the grinding wheel is a resin grinding wheel with a particle size of 46#. The grinding wheel with such material and particle size parameters can ensure that the overall roughness of the intermediate roller meets the requirements.

[0054] Overall, the intermediate roller processing method provided by the embodiment of the present application can shorten the grinding time, improve the grinding efficiency and improve the grinding quality difference, thereby shortening the roller preparation period and ensuring the normal operation of the production line.

[0055] The intermediate roller grinding method provided by the present application will be further described below in combination with specific examples and comparative examples.

[0056] Example 1-3 and Comparative Example 1

[0057] Example 1-3 provides an intermediate roller grinding method, which specifically includes the following steps:

[0058] 1. Rough grinding the intermediate roller to obtain a rough ground roller;

[0059] 2. Semi-finish grinding the rough ground roller to obtain a semi-finish ground roller;

[0060] 3. Finish grinding the semi-finish ground roller to obtain a finish ground roller;

[0061] 4. Chamfer semi-finish grinding the finish ground roller to complete the grinding of the intermediate roller.

[0062] Comparative Example 1 provides an intermediate roller grinding method, which specifically includes the following steps:

[0063] 1. Rough grinding the intermediate roller to obtain a rough ground roller;

[0064] 2. The rough grinding roller is once semi-finished grinding to obtain a once semi-finished grinding roller;

[0065] 3. The once semi-finished grinding roller is chamfered semi-finished grinding to obtain a chamfered semi-finished grinding roller;

[0066] 4. The chamfered semi-finished grinding roller is twice semi-finished grinding to obtain a twice semi-finished grinding roller;

[0067] 5. The twice semi-finished grinding roller is finished grinding to complete the grinding of the intermediate roller.

[0068] Table 1

[0069]

[0070] Table 2

[0071]

[0072] Table 3

[0073]

[0074] Table 1 is a comparison of the parameters of the rough grinding of Examples 1-3 and Comparative Example 1. Analysis shows that the rough grinding in the application has a higher Z-axis movement speed and a smaller grinding current, so as to reduce the interval width and roughness of the spiral pattern.

[0075] Table 2 is a comparison of the parameters of the chamfered semi-finished grinding of Examples 1-3 and Comparative Example 1. Table 3 is a comparison of the effect parameters after the grinding of the intermediate roller of Examples 1-3 and Comparative Example 1. In combination with Table 2 and Table 3, the Z-axis movement speed of Examples 1-3 is higher than that of Comparative Example 1, which can shorten the overall grinding time of the intermediate roller. In Comparative Example 1, the overall grinding time of the intermediate roller is about 55 minutes, while in Examples 1-3, the overall grinding time of the intermediate roller is about 45 minutes.

[0076] In combination with Table 2 and Table 3, the grinding current of Examples 1-3 is lower than that of Comparative Example 1. Since the larger the grinding current of the grinding machine, the larger the roughness of the intermediate roller after grinding, it is necessary to reduce the grinding current of the grinding machine on the basis of meeting the grinding quality requirements, so that the roughness after grinding of Examples 1-3 can be reduced compared with Comparative Example 1.

[0077] In addition, in combination with Table 2, the ratio of the speed of the grinding wheel to the speed of the intermediate roller of Examples 1-3 is better than that of Comparative Example 1. Among them, Example 1 is 0.6, Example 2 is 0.53, Example 3 is 0.47, and Comparative Example 1 is 0.34. Examples 1-3 are all higher than Comparative Example 1, so as to reduce the diagonal lines of the transition area between the chamfered intermediate roller and the roller surface.

[0078] In summary, the grinding method of the intermediate roller can shorten the grinding time, improve the grinding efficiency and grinding quality, thereby shortening the standby roller cycle and ensuring the normal operation of the production line.

[0079] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature therebetween. Moreover, the first feature "on", "above" and "over" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0080] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0081] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative positional relationship, movement condition and the like between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0082] In the present application, unless specifically defined and limited otherwise, the terms "connection", "fixing" and the like should be broadly understood, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless specifically defined otherwise. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0083] In addition, the terms "first", "second", and the like, as used in the description of the application, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the descriptive terms "first", "second", etc., are to be interpreted, by those skilled in the art, as a structural or positional description and not by their reference

[0084] In the description of the application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" are intended to indicate that the described implementation, implementation, example, specific example, or some examples are included in at least one of the embodiments or examples of the present application. In the description of the present application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate different embodiments or examples described in the specification.

[0085] In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appear contradictory or can not be realized, it should be considered that the combination of technical solutions does not exist, also not within the scope of protection claimed by the present application.

[0086] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, the scope of the present application is defined by the claims and their equivalents.

Claims

1. A grinding method of an intermediate roll characterized by, The method comprises: coarsely grinding the intermediate roller to obtain a coarsely ground roller; semi-finely grinding the coarsely ground roller to obtain a semi-finely ground roller; finely grinding the semi-finely ground roller to obtain a finely ground roller; chamfering the semi-finely ground roller to complete the grinding of the intermediate roller; In the chamfering semi-fine grinding, the Z-axis movement speed of the grinding machine is 300-320 mm / min, the speed of the grinding wheel of the grinding machine is 26-30 m / s, the speed of the intermediate roller is 50-55 rpm, and the grinding current of the grinding machine is 5-6 A. The grinding curve of the chamfering of the intermediate roller can be divided into a plurality of grinding sections from one end of the intermediate axis to the other end, and the grinding curve of the chamfering semi-fine grinding is divided into 13 grinding sections from one end of the intermediate roller to the other end, wherein the grinding wheel movement speed of the first to eleventh grinding sections is 7% of the Z-axis speed, and the grinding wheel movement speed of the twelfth to thirteenth grinding sections is 100% of the Z-axis speed.

2. The grinding method of the intermediate roll according to claim 1, characterized by, In the coarse grinding, the Z-axis movement speed of the grinding machine is 2500-3000 mm / min, the speed of the grinding wheel of the grinding machine is 24-30 m / s, the speed of the intermediate roller is 38-40 rpm, the feed amount of the grinding wheel is 0.02-0.04 mm / min, and the grinding current of the grinding machine is 25-30 A.

3. The grinding method of the intermediate roll according to claim 1, characterized by, The semi-fine grinding comprises a first semi-fine grinding sub-process, a second semi-fine grinding sub-process, and a third semi-fine grinding sub-process performed in sequence, and the fine grinding comprises a first fine grinding sub-process and a second fine grinding sub-process performed in sequence.

4. The grinding method of the intermediate roll according to claim 3, characterized by, In the first semi-fine grinding sub-process, the Z-axis movement speed of the grinding machine is 1800-2000 mm / min, the speed of the grinding wheel of the grinding machine is 18-20 m / s, the speed of the intermediate roller is 40-44 rpm, the feed amount of the grinding wheel is 0.007-0.008 mm / min, and the grinding current of the grinding machine is 18-25 A.

5. The grinding method of the intermediate roll according to claim 3, characterized by, In the second semi-fine grinding sub-process, the Z-axis movement speed of the grinding machine is 1400-1600 mm / min, the speed of the grinding wheel of the grinding machine is 16-18 m / s, the speed of the intermediate roller is 44-48 rpm, the feed amount of the grinding wheel is 0.004-0.006 mm / min, and the grinding current of the grinding machine is 14-18 A.

6. The grinding method of the intermediate roll according to claim 3, characterized by, In the third semi-fine grinding sub-process, the Z-axis movement speed of the grinding machine is 1000-1200 mm / min, the speed of the grinding wheel of the grinding machine is 14-16 m / s, the speed of the intermediate roller is 48-52 rpm, the feed amount of the grinding wheel is 0.002-0.004 mm / min, and the grinding current of the grinding machine is 10-14 A.

7. The grinding method of the intermediate roll according to claim 3, characterized by, In the first fine grinding sub-process, the Z-axis moving speed of the grinder is 800mm / min~900mm / min, the rotating speed of the grinding wheel of the grinder is 12m / s~14m / s, the rotating speed of the intermediate roller is 50rpm~55rpm, the feeding amount of the grinding wheel is 0mm / min, and the grinding current of the grinder is 7A~8A.

8. The grinding method of the intermediate roll according to claim 3, characterized by, In the second fine grinding sub-process, the Z-axis moving speed of the grinder is 800mm / min~900mm / min, the rotating speed of the grinding wheel of the grinder is 10m / s~12m / s, the rotating speed of the intermediate roller is 55rpm~60rpm, the feeding amount of the grinding wheel is 0mm / min, and the grinding current of the grinder is 6A~7A.

9. The grinding method of the intermediate roll according to any one of claims 2 to 8, characterized in that, The grinding wheel is a resin grinding wheel with a particle size of 46#.

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