Method for repairing flat head of working roll

Abstract

The invention discloses a method for repairing a flat head of a working roller, and solves the technical problems that the working roller is stopped after the flat head of the working roller is abraded and the use cost is high at present. The working roll flat head repairing method comprises the steps that at least one plane of a flat head is machined to remove a wear face on the plane; providing a gasket matched with the plane according to the plane of which the wear surface is removed; and the gasket is connected with the corresponding machined plane to form a new flat head, and the thickness of the new flat head is the target thickness. According to the method for rapidly repairing the flat head, the service life of the working roller can be prolonged.

Description

Technical Field

[0001] The present application belongs to the technical field of working roll processing, and specifically relates to a working roll flat head repair method. Background Art

[0002] The rough rolling work roll is a key part of the entire steel rolling production line. The rough rolling work roll flat head is installed in the main shaft sleeve of the rolling mill, and the rotation of the main shaft drives the roll to rotate. The rough rolling process requires reciprocating rolling, so higher requirements are placed on the matching clearance between the flat head of the roll and the sleeve. However, with the long-term use of the roll, the flat head will inevitably wear out. At the same time, with the increase of the matching clearance and the reciprocating rolling, the wear of the flat head will become more serious. Rollers with severe and abnormal wear on the flat head can only be deactivated at this time, which will increase the cost of the rolls. In addition, the rolls with defects have serious accident risks, which can easily cause the rolled pieces to slip and be unable to enter the rolling mill, and other serious accidents, posing a great safety risk. Summary of the invention

[0003] In order to solve the current technical problem that the working roll flat head is out of service due to wear and tear, and the use cost is high, the present application provides a working roll flat head repair method.

[0004] In a first aspect of the present application, a method for repairing a flat head of a working roll is provided, comprising:

[0005] Step 1: machining at least one plane of the flat head to remove the wear surface on the plane;

[0006] Step 2: providing a gasket matching the plane according to the plane from which the wear surface is removed;

[0007] Step three: Connect the gasket to the corresponding processed plane to form a new flat head, wherein the thickness of the new flat head is the target thickness.

[0008] In some embodiments, the working roll flat head repair method further includes:

[0009] Processing the end surface of the flat head to form a first connecting portion, wherein each of the gaskets is matched with one first connecting portion;

[0010] The provided gasket is provided with a second connection portion matching the first connection portion;

[0011] Connect the second connection portion of the gasket to the corresponding first connection portion.

[0012] In some embodiments, the first connecting portion includes at least one first screw hole, and the second connecting portion is a protrusion provided at one end of the gasket, and the protrusion is provided with a through hole or a screw hole matching the first screw hole.

[0013] In some embodiments, a mounting groove is processed on the end surface of the flat head, the first screw hole is arranged at the bottom of the mounting groove, and the protrusion of the gasket is provided to be snap-fitted with the mounting groove.

[0014] In some embodiments, the step 1 further includes: after removing the wear surface on the plane, processing the plane so that the plane has a first positioning portion;

[0015] The step 2 further includes: the provided gasket is provided with a second positioning portion that slidably cooperates with the first positioning portion.

[0016] In some embodiments, the first positioning portion is a strip groove, the length direction of which is parallel to the axial direction of the working roll; and the second positioning portion is a strip protrusion.

[0017] In some embodiments, the step one further comprises: chamfering the portion between the wear surfaces on the two planes and the journal of the working roll.

[0018] In some embodiments, the step 1 further includes: obtaining a thickness difference between the plane after the wear surface is removed and the initial plane of the flat head;

[0019] The step 2 also includes providing the gasket based on obtaining the thickness difference, wherein the thickness of the gasket is equal to the thickness difference.

[0020] In some embodiments, the working roll flat head repair method further includes step 4, detecting whether the thickness of the flat head after the repair is completed is the target thickness.

[0021] In some embodiments, if the entire surface of the processed surface is processed, one of the spacers is provided to cover the surface;

[0022] If only two sides of the processed plane are processed, two gaskets are provided to cover the processed parts of the plane.

[0023] According to the method for repairing the flat head of a working roll provided in one or more embodiments of the present application, the flat head of the working roll is repaired by removing the worn surface of the flat head and then connecting a gasket on the plane of the flat head. The worn surface can be effectively removed to ensure the connection effect of the gasket, and the repaired flat head can be close to the initial specifications of the working roll, thereby adapting to the corresponding position on the entire steel rolling production line. The service life of the working roll will be greatly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic flow chart of a working roll flat head repair method in one or more embodiments of the present application is shown.

[0025] Figure 2 A schematic structural diagram of a flat head being repaired in a working roll flat head in one or more embodiments of the present application is shown.

[0026] Figure 3 A schematic structural diagram of a flat head of a working roll after the flat head is repaired in one or more embodiments of the present application is shown.

[0027] Figure 4 Shows Figure 3 Schematic diagram of the structure from another perspective.

[0028] Figure 5 Shows Figure 3 Schematic diagram of the cross-sectional structure along the AA direction.

[0029] Figure 6 Shows Figure 3 Schematic diagram of the cross-sectional structure along the BB direction.

[0030] Figure 7 A schematic structural diagram of a flat head of a working roll after the flat head is repaired in one or more embodiments of the present application is shown.

[0031] Explanation of the reference numerals: 1-flat head, 11-mounting groove, 12-first positioning portion, 2-gasket, 21-protrusion, 22-second positioning portion, 3-working roller, 4-screw. DETAILED DESCRIPTION

[0032] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0033] See also Figure 1-Figure 6 The first aspect of the present application provides a method for repairing a flat head of a working roll, comprising the following steps.

[0034] Step S100: processing at least one plane of the flat head 1 to remove the wear surface on the plane;

[0035] Step S200: providing a gasket 2 matching the plane according to the plane from which the wear surface is removed;

[0036] Step S300: Connect the gasket 2 to the corresponding processed plane to form a new flat head, wherein the sum of the thicknesses of the new flat head is the target thickness.

[0037] There is inconsistency in the wear of the two planes on the flat head 1, that is, the different planes of the flat head 1 at both ends of the same working roller 3 have different degrees of wear and the way of wear. It can be understood that if the entire surface of one of the planes of the flat head 1 is worn or deformed, then the entire surface of the plane is a wear surface; if the entire surface of one of the planes of the flat head 1 is not worn or deformed, then there is no wear surface on the plane; if only two sides of one of the planes of the flat head 1 are deformed due to torsion, then the areas on both sides of the plane that are deformed or worn are wear surfaces. That is, in the process of repairing the flat head 1 in the present application, it is selected whether to process the plane according to the different degrees of wear of different planes, and a gasket is provided for the plane after the wear surface is removed by processing to reduce the loss of the flat head 1. Among them, the method of removing the wear surface may include milling or grinding, and the part after the wear surface is removed is polished after preliminary milling or grinding to ensure that the plane of the flat head 1 is smooth and easy to connect with the gasket 2. The connection method between the gasket 2 and the flat head 1 can be bonding, welding, or other connection methods that can stably set the gasket 2 on the flat head 1.

[0038] After grinding the wear surfaces of different surfaces, the thickness lost on different planes of the flat head 1 may be different. Therefore, for different planes of the flat head 1 with removed wear surfaces, the corresponding gasket 2 is matched, and the thickness of the new flat head obtained after connecting the gasket 2 with the processed flat head 1 is the target thickness. The target thickness is the thickness of the flat head 1 that can be used in the production line. Of course, the value of the target thickness can be a numerical range.

[0039] The flat head 1 of the working roll 3 is repaired by removing the worn surface of the flat head 1 and then connecting the gasket 2 on the plane of the flat head 1. This can effectively remove the worn surface, ensure the connection effect of the gasket 2, and make the repaired flat head 1 close to the initial specifications of the working roll 3, and then adapt to the corresponding position on the entire steel rolling production line. The service life of the working roll 3 will be greatly increased.

[0040] In some embodiments, step S300 further includes: bonding the gasket 2 to the flat surface of the flat head 1 by glue.

[0041] It can be understood that connecting the gasket 2 to the flat head 1 by gluing is fast and easy to operate, which can greatly improve the repair efficiency. In addition, the thickness of the glue is thin, which has little effect on the thickness of the repaired flat head 1.

[0042] In some embodiments, the method for repairing the flat head 1 of the working roll 3 further includes step S400: detecting whether the thickness of the flat head 1 after the repair is the target thickness, so as to confirm whether the repaired working roll 3 can be put into use in the production line.

[0043] Of course, in some embodiments, step S410 is also included: after the gasket 2 is installed on the corresponding plane, the parallelism of the two planes of the repaired flat head 1 is checked. When the parallelism deviation between the two planes of the flat head 1 is less than the set value, the repair effect is considered to be qualified, and the working roller 3 can be put into use on the production line, wherein the set value can be set according to the required accuracy of the production line where the working roller 3 is located.

[0044] In some embodiments, the method for repairing the flat head 1 of the working roll 3 further includes:

[0045] Step S110: processing the end surface of the flat head 1 to form a first connecting portion, wherein each gasket is matched with a first connecting portion;

[0046] The gasket 2 provided in step S200 is provided with a second connection portion matching the first connection portion;

[0047] Step S310: Connect the second connection portion of the gasket 2 to the corresponding first connection portion.

[0048] Specifically, while processing the plane of the flat head 1 to remove the wear surface, a first connection portion is processed on the end face of the flat head 1. In order to ensure the correct operation of the working roll 3 on the production line, the length of the flat head 1 in the axial direction of the working roll 3 cannot be changed, so the first connection portion is a structure such as a groove or a blind hole that is concave compared to the end face of the flat head 1. A second connection portion that matches the first connection portion is processed at one end of the gasket 2. The second connection portion matches the first connection portion, which can increase the tightness of the connection between the gasket 2 and the flat head 1.

[0049] In some embodiments, the first connection portion includes at least one first screw hole, and the second connection portion is a protrusion 21 disposed at one end of the gasket 2, and the protrusion 21 is provided with a through hole or a screw hole matching the first screw hole.

[0050] Specifically, through the first screw holes of the two sections of the screw 4 and the through holes or screw holes on the raised portion 21 that match the first screw holes, the gasket 2 can be tightly connected to the end face of the flat head 1 and can be detachable. It can be understood that when the gasket 2 and the plane of the flat head 1 are not welded, the gasket 2 can be easily removed from the plane of the flat head 1. After the gasket 2 is worn, the gasket 2 can be replaced with a new one by removing the screw 4 and then removing the gasket 2, so as to further improve the service life of the working roller 3.

[0051] Of course, in order not to increase the length of the flat head 1 in the axial direction of the working roll 3, in some embodiments, a mounting groove 11 is processed on the end face of the flat head 1, and a first screw hole is set at the bottom of the mounting groove 11, and the protrusion 21 of the provided gasket 2 can be engaged with the mounting groove 11. Among them, the mounting groove 11 can have only one groove wall, or the mounting groove 11 has two groove walls but the height of the groove wall close to the plane of the two groove walls is lower than the height of the other groove wall, and the depth of the mounting groove 11 is not less than the thickness of the protrusion 21 of the gasket 2, that is, when the gasket 2 is installed on the flat head 1, the length of the flat head 1 will not change; at the same time, the cooperation between the mounting groove 11 and the protrusion 21 can also increase the speed of installing the gasket 2 and improve the efficiency of repairing the flat head 1.

[0052] In some embodiments, step S100 further includes step S120 : after removing the worn surface on the plane, processing the plane so that the plane has a first positioning portion 12 .

[0053] The gasket 2 provided in step S200 is provided with a second positioning portion 22 that is slidably matched with the first positioning portion 12 .

[0054] The first positioning portion 12 is machined on a plane, so it can be understood that the first positioning portion 12 is a groove structure, and the first positioning portion 12 and the second positioning portion 22 are slidably matched, that is, the second positioning portion 22 can slide inside the first positioning portion 12, that is, through the cooperation of the first positioning portion 12 and the second positioning portion 22, on the one hand, the connection area between the gasket 2 and the flat head 1 is increased, and on the other hand, the first positioning portion 12 and the second positioning portion 22 limit each other, so that the flat head 1 can limit the position of the gasket 2, thereby reducing the risk of the gasket 2 falling off the flat head 1 and improving the safety performance of the repaired working roller 3.

[0055] In some embodiments, the first positioning portion 12 is a strip groove, and the length direction of the strip groove is parallel to the axial direction of the working roller 3; the second positioning portion 22 is a strip protrusion. Specifically, the plane where the groove wall of the strip groove is located is parallel to the axial direction of the working roller 3, and the direction in which the strip groove limits the pad is perpendicular to the axial direction of the working roller 3. During the rotation of the working roller 3, the force borne by the flat head 1 is mostly perpendicular to the plane, and there is torque. Therefore, through the mutual cooperation of the first positioning portion 12 and the second positioning portion 22, the torque resistance of the gasket 2 can be improved, so that the gasket 2 is not easy to fall off from the flat head 1.

[0056] Among them, each plane is provided with two first positioning portions 12, and the two first positioning portions 12 are arranged in parallel, so as to further increase the connection area between the gasket 2 and the flat head 1, and the area of ​​the surface capable of limiting the gasket 2 is also further increased.

[0057] In some embodiments, step S100 further includes step S130: chamfering the portion between the removed wear surfaces on the two planes and the journal of the working roll 3. Correspondingly, the gasket 2 provided in step S200 also has a portion matching the chamfer.

[0058] In some embodiments, step S100 further includes step S140: obtaining a thickness difference between the plane after the wear surface is removed and the initial plane of the flat head 1;

[0059] Step S200 further includes step S210: providing a gasket 2 based on the obtained thickness difference, wherein the thickness of the gasket 2 is equal to the thickness difference.

[0060] Generally speaking, the plane of the flat head 1 processed in step S100 is parallel to the initial plane to reduce the difficulty of processing the gasket 2. Of course, the plane of the flat head 1 after removing the wear surface can also be an inclined plane compared to the initial plane, and a gasket 2 with the same inclination can be provided. By providing a suitable gasket 2, the plane of the new flat head 1 obtained after the gasket 2 is installed on the flat head 1 can be flush with the initial plane of the flat head 1. Of course, when considering the connection method between the gasket 2 and the flat head 1, the thickness of the gasket 2 can be slightly less than the thickness difference.

[0061] In this embodiment, if the entire surface of the machined plane is machined, a gasket is provided to cover the plane, see Figure 5 At this time, the gasket 2 can cover the entire plane, and the gasket 2 can be provided with two second positioning parts to improve the connection tightness between the gasket and the flat head 1.

[0062] If the surface being machined is machined on only two sides, provide two shims to cover the machined portion of the surface. Figure 7 Generally speaking, the two sides of a single plane of the flat head are worn or deformed more seriously. Therefore, in some cases, only the two sides of the plane of the flat head 1 can be processed. Since the middle part of the flat head 1 is not deformed at this time, the thickness of the middle part of the flat head 1 is still the initial thickness of the flat head, that is, the target thickness. At this time, the gasket 2 only matches the corresponding processing surface, and the surface of the installed gasket 2 is flush with the unprocessed surface of the plane of the flat head 1. Among them, the two sides of the plane of the flat head 1 can be processed into a groove shape, so that the opposite side walls of the groove can limit the two side walls of the gasket 2.

[0063] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0064] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0065] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two elements, or interaction between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0066] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0067] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A method for repairing a flat head of a working roll, characterized in that: include: Step 1: machining at least one plane of the flat head to remove the wear surface on the plane; Step 2: providing a gasket matching the plane according to the plane from which the wear surface is removed; Step three: Connect the gasket to the corresponding processed plane to form a new flat head, wherein the thickness of the new flat head is the target thickness.

2. The working roll flat head repair method according to claim 1, characterized in that: The working roll flat head repairing method also includes: Processing the end surface of the flat head to form a first connecting portion, wherein each of the gaskets is matched with one first connecting portion; The provided gasket is provided with a second connection portion matching the first connection portion; Connect the second connection portion of the gasket to the corresponding first connection portion.

3. The working roll flat head repair method according to claim 2, characterized in that: The first connection portion includes at least one first screw hole, and the second connection portion is a protrusion disposed at one end of the gasket, and the protrusion is provided with a through hole or a screw hole matching the first screw hole.

4. The working roll flat head repair method according to claim 3, characterized in that: A mounting groove is processed on the end surface of the flat head, the first screw hole is arranged at the bottom of the mounting groove, and the protruding portion of the gasket can be engaged with the mounting groove.

5. The working roll flat head repairing method according to claim 1, characterized in that: The step 1 further includes: after removing the wear surface on the plane, processing the plane so that the plane has a first positioning portion; The step 2 further includes: the provided gasket is provided with a second positioning portion that slidably cooperates with the first positioning portion.

6. The working roll flat head repair method according to claim 5, characterized in that: The first positioning portion is a strip groove, the length direction of which is parallel to the axial direction of the working roll; and the second positioning portion is a strip protrusion.

7. The working roll flat head repair method according to claim 1, characterized in that: The step one also includes: chamfering the portion between the wear surfaces on the two planes and the journal of the working roll.

8. The method for repairing the flat head of a working roll according to claim 1, characterized in that: The step 1 further includes: obtaining a thickness difference between the plane after the wear surface is removed and the initial plane of the flat head; The step 2 also includes providing the gasket based on obtaining the thickness difference, wherein the thickness of the gasket is equal to the thickness difference.

9. The working roll flat head repairing method according to claim 1, characterized in that: The working roll flat head repair method further includes step 4, detecting whether the thickness of the flat head after the repair is completed is the target thickness.

10. The working roll flat head repairing method according to any one of claims 1 to 9, characterized in that: If the entire surface of the surface to be processed is processed, one of the spacers is provided to cover the surface; If only two sides of the processed plane are processed, two gaskets are provided to cover the processed parts of the plane.

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