A method of processing a backup roll

Abstract

The application discloses a supporting roller processing method, which solves the technical problem of low roller type precision of the existing supporting roller reprocessing. The supporting roller processing method comprises the following steps: step one, marking a bearing seat with a limit damage of a positioning surface damage; step two, obtaining a height difference value between a height value of a lower arc-shaped base plate of the marked bearing seat and a groove depth value of a groove of a center frame of a grinding machine; step three, providing a gasket according to the obtained height difference value, and fixing and arranging the gasket at a groove bottom of the groove; and step four, re-installing the bearing seat on the center frame, wherein the lower arc-shaped base plate of the bearing seat is in contact with a top surface of the gasket, so that the lower arc-shaped base plate forms a new positioning surface. The supporting roller processing method has high roller type precision of the reprocessed supporting roller and reduces the reprocessing cost.

Description

Technical Field

[0001] This application belongs to the field of support roller processing technology, and specifically relates to a support roller processing method. Background Technology

[0002] As a crucial component of the steel rolling production line, the support rolls need to maintain high roll profile accuracy to ensure the yield of finished products.

[0003] Please see Figure 1 During the production or maintenance of the support roll, the support roll needs to be ground on the grinding machine with the bearing housing. However, the bearing housing is in harsh working conditions and has a long service cycle. The positioning surface of the bearing housing that is used to mate with the center frame of the grinding machine is prone to severe corrosion, which leads to inaccurate positioning of the positioning surface. After the roll is ground, the roll shape accuracy cannot meet the tolerance requirements, so it can only be re-ground. Occasionally, the requirements still cannot be met after re-grinding, which affects the turnover of the roll. Summary of the Invention

[0004] To address the technical problem of low roll profile accuracy in current reprocessed support rolls, this application provides a support roll processing method.

[0005] In a first aspect of this application, a method for processing a support roller is provided, comprising:

[0006] Step 1: Mark the bearing housing where the damage to the positioning surface has reached the limit of damage;

[0007] Step 2: Obtain the height difference between the height of the lower arc-shaped pad of the marked bearing housing relative to the positioning surface and the groove depth of the center rest of the grinding machine.

[0008] Step 3: Provide a shim based on the obtained height difference value, and fix the shim at the bottom of the groove;

[0009] Step 4: Reinstall the bearing housing onto the center frame, wherein the lower arc-shaped pad of the bearing housing contacts the top surface of the plate, so that the lower arc-shaped pad forms a new positioning surface.

[0010] In some implementations, step one includes:

[0011] Obtain the roll profile accuracy of the support roll processed by the grinding machine;

[0012] If the obtained roller profile accuracy does not meet the processing requirements, check whether the positioning surfaces of the bearing seats at both ends of the support roller are damaged to the limit of damage.

[0013] In some embodiments, step two includes grinding the marked positioning surface of the bearing housing to remove the wear surface, and after removing the wear surface, obtaining the height difference value.

[0014] In some embodiments, step three includes providing two gaskets at the bottom of each groove, with the bottom surface of the lower arc-shaped pad contacting the top surfaces of both gaskets.

[0015] In some embodiments, step three includes obtaining the groove width of the groove and providing the gasket according to the obtained groove width, wherein the width of the gasket is smaller than the groove width of the groove.

[0016] In some embodiments, step three includes fixing the gasket at the bottom of the groove, such that the sidewall of the gasket is spaced apart from the groove wall.

[0017] In some embodiments, step three includes obtaining the hardness of the lower arc-shaped pad of the bearing housing, and providing the gasket according to the obtained hardness of the lower arc-shaped pad, wherein the hardness of the gasket is less than the hardness of the lower arc-shaped pad of the bearing housing.

[0018] In some embodiments, the recycling method further includes,

[0019] Step 5: Start the grinding machine to perform test grinding on the support roller;

[0020] Step 6: Obtain the roll profile accuracy of the support roller after the test grinding operation;

[0021] Step 7: If the roll profile accuracy of the support roller does not meet the processing requirements, adjust the contact state between the lower arc-shaped pad and the pad until the roll profile accuracy of the support roller obtained by the test grinding operation meets the processing requirements.

[0022] In some embodiments, the recycling method further includes,

[0023] Step 8: Obtain the real-time thickness of the gasket. Replace the gasket after the difference between the real-time thickness of the gasket and the initial thickness of the gasket exceeds the limit difference.

[0024] The support roller processing method provided according to one or more embodiments of this application provides a shim to the center rest of the grinding machine, so that the shim on the center rest can contact the lower arc-shaped pad of the bearing housing. This makes the surface of the lower arc-shaped pad in contact with the shim a new positioning surface with high precision. As a new positioning surface for processing support rollers, it can effectively improve the roller shape accuracy of recycled support rollers after reprocessing on the grinding machine. Moreover, it makes reasonable use of the existing structure of the bearing housing, improves the accuracy of the positioning surface without replacing the bearing housing, and reduces the cost of recycling and reprocessing support rollers. Attached Figure Description

[0025] Figure 1A schematic diagram of the structure of the bearing housing and the center frame in the prior art is shown.

[0026] Figure 2 A schematic flowchart of the support roller processing method in one or more embodiments of this application.

[0027] Figure 3 A schematic diagram of the structure of a portion of the bearing housing and the center frame in one or more embodiments of this application is shown.

[0028] Figure 4 It shows Figure 3 Schematic diagram of the cross-sectional structure along the AA direction.

[0029] Explanation of reference numerals in the attached drawings: 1-bearing housing, 11-lower arc-shaped pad, 12-positioning surface, 13-new positioning surface, 2-center frame, 21-groove, 22-groove bottom, 23-groove wall, 3-shim. Detailed Implementation

[0030] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0031] Please see Figure 1 For existing support roller processing, the positioning surface 12 of the bearing housing 1 is part of the bottom surface of the bearing housing 1, and the bottom surface of the bearing housing 1 is provided with a lower arc-shaped pad 11, which generally serves as a limit. That is, the lower arc-shaped pad 11 is not easily worn during the use or processing of the support roller. The lower arc-shaped pad 11 protrudes from the bottom surface of the bearing housing 1. The structure used to connect with the bearing housing 1 on the grinding machine is a center frame 2. The center frame 2 has a receiving surface that matches the positioning surface 12. The receiving surface is provided with a groove 21 to accommodate the lower arc-shaped pad 11 of the bearing housing 1, and the width of the groove 21 is greater than the width of the lower arc-shaped pad 11. At this time, the lower arc-shaped pad 11 does not contact the bottom 22 of the groove 21 of the center frame 2.

[0032] Please see Figures 2-4 According to a first aspect of this application, a method for processing a support roller includes the following steps.

[0033] Step S100: Mark the bearing housing 1 where the damage on the positioning surface 12 has reached the limit of damage.

[0034] Step S200: Obtain the height difference between the height of the lower arc-shaped pad 11 of the marked bearing housing 1 relative to the positioning surface 12 and the groove depth of the groove 21 of the center frame 2 of the grinding machine.

[0035] Step S300: Provide a shim 3 according to the obtained height difference, and fix the shim 3 at the bottom 22 of the groove 21.

[0036] Step S400: Reinstall the bearing housing 1 onto the center frame 2, wherein the lower arc-shaped pad 11 of the bearing housing 1 contacts the top surface of the pad 3, so that the lower arc-shaped pad 11 forms a new positioning surface 13.

[0037] During the grinding process of support rollers, the working time of different support rollers varies, resulting in different degrees of corrosion or other types of wear on the bearing seats 1 at both ends of the support roller. When the wear or corrosion on the positioning surface 12 of the bearing seat 1 exceeds the limit damage, the misalignment of the positioning surface 12 will cause the roller profile accuracy of the support roller to be lower than the processing requirements. Therefore, bearing seats 1 with damage exceeding the limit damage are marked to make the processing method more targeted and reduce processing costs. The bearing seat 1 can be marked by making easily observable marks on the surface of the bearing seat 1 by scratching or drawing; the standard for the limit damage can be selected as the flatness or roughness of the positioning surface 12.

[0038] After obtaining the marked bearing housing 1 through step S100, considering that the height difference between the damaged positioning surface 12 and the lower arc-shaped pad 11 is very easy to increase, the height difference between the lower arc-shaped pad 11 of the bearing housing 1 and the positioning surface 12 and the groove depth of the groove 21 of the center frame 2 of the grinding machine is obtained to obtain a more accurate gap between the groove bottom 22 of the groove 21 and the lower arc-shaped pad 11, thereby providing a shim 3 with a thickness matching the marked bearing housing 1, ensuring that the lower arc-shaped pad 11 can contact the shim 3 installed at the groove bottom 22 of the groove 21.

[0039] Understandably, by providing a shim 3 to the center rest 2 of the grinding machine, the shim 3 on the center rest 2 can contact the lower arc-shaped shim 11 of the bearing housing 1. This makes the contact surface between the lower arc-shaped shim 11 and the shim 3 the new positioning surface 13. The lower arc-shaped shim 11 is not easily deformed or worn during use. Naturally, the distance between the bottom surface of the lower arc-shaped shim 11 and the support roller on the bearing housing 1 remains unchanged. Therefore, using the part of the lower arc-shaped shim 11 that contacts the shim 3 as the new positioning surface 13 has high precision. The arc surface of the lower arc-shaped shim 11 is coaxial with the axis of the bearing housing 1. Using it as a new positioning surface 12 for processing the support roller can effectively improve the roller shape accuracy of the recycled support roller after reprocessing by the grinding machine. Moreover, by making reasonable use of the existing structure of the bearing housing 1, the accuracy of the positioning surface 12 is improved without replacing the bearing housing 1, and the cost of recycling and reprocessing the support roller is reduced.

[0040] In some embodiments, step S100 includes:

[0041] S110: Obtain the roll profile accuracy of the support roll after grinding.

[0042] S120: If the obtained roller profile accuracy does not meet the processing requirements, check whether the positioning surface 12 of the bearing seat 1 at both ends of the support roller is damaged to the limit of damage.

[0043] Generally, operators can visually inspect whether there is severe wear on the positioning surfaces 12 of the bearing housings 1 at both ends of the support roller. However, this type of estimation is limited by the operator's experience, and different operators have different standards for judging the damage of the positioning surfaces 12. Therefore, by obtaining whether the roller profile accuracy of the recycled and processed support roller meets the processing requirements, it can be determined whether there is severe wear on the positioning surfaces 12 of the bearing housings 1. Furthermore, the surface of the positioning surfaces 12 can be inspected using appropriate equipment to determine whether the damage of the positioning surfaces 12 exceeds the limit damage value. Specifically, if the flatness of the positioning surfaces 12 is greater than the set value and / or the roughness of the positioning surfaces 12 is greater than the set value, it can be considered that the damage of the positioning surfaces 12 exceeds the limit damage value.

[0044] For bearing housing 1 whose damage to positioning surface 12 does not exceed the limit damage value, the operator can check whether the failure of other parts of the grinding machine has caused the roll profile accuracy of the finished support roller to not meet the processing requirements.

[0045] In some embodiments, step S200 includes grinding the positioning surface 12 of the marked bearing housing 1 to remove the wear surface, and after removing the wear surface, obtaining the height difference value.

[0046] By removing the worn surface, the accuracy of the height difference can be improved. Specifically, the worn surface is the damaged surface on the positioning surface 12. The damage to the positioning surface 12 causes changes in the flatness of the positioning surface 12. Directly measuring the height difference may result in a value that is too large or too small. Furthermore, the rust-related damage will change as the bearing housing 1 is used. Therefore, after removing the worn surface, the height difference between the positioning surface 12 and the lower arc-shaped pad 11 will not easily change during the use of the bearing, thus not having a significant impact on the positioning effect of the new positioning surface 13, which is beneficial for the reprocessing of the support roller.

[0047] Please see Figure 3 In some embodiments, step S300 includes providing two gaskets 3 at the bottom 22 of each groove 21, with the bottom surface of the lower arc-shaped pad 11 in contact with the top surfaces of the two gaskets 3.

[0048] The gasket 3 can be installed in the groove 21 by welding or screwing. The groove 21 of some center frame 2 is relatively long. By setting two gaskets 3 and setting the two gaskets 3 at intervals, the consumption of gaskets 3 can be reduced and the use cost can be reduced.

[0049] In some embodiments, step S300 includes obtaining the groove width of the groove 21 and providing a gasket 3 according to the obtained groove width of the groove 21, wherein the width of the gasket 3 is smaller than the groove width of the groove 21.

[0050] Considering the heavy weight of the support roller and its bearing housing 1, and the thinness of the shim 3, the width of the shim 3 is made smaller than the opening of the groove 21 to leave a gap. During the load-bearing process, even if the shim 3 deforms, it can extend towards the gap between the shim 3 and the groove wall 23 of the groove 21. The top surface of the shim 3 is not prone to unevenness due to the restriction of the groove 21. Moreover, the top surface of the shim 3, which is deformed by the pressure of the lower arc-shaped pad 11, will fit the shape of the lower arc-shaped pad 11 more closely. The contact area between the shim 3 and the lower arc-shaped pad 11 is increased, and the lower arc-shaped pad 11 is not easily deformed. That is, the new positioning surface 13 can maintain a good positioning effect.

[0051] Please see Figure 3 and Figure 4 In some embodiments, step S300 includes fixing a gasket 3 to the bottom 22 of the groove 21, and making the sidewall of the gasket 3 spaced apart from the groove wall 23 of the groove 21.

[0052] That is, the gasket 3 does not contact the groove wall 23 of the groove 21 around its perimeter, so as to leave a gap for the deformation of the gasket 3. It should be noted that in this embodiment, the groove wall 23 of the groove 21 refers to the side wall of the groove 21, not the bottom wall.

[0053] In some embodiments, step S300 includes obtaining the hardness of the lower arc-shaped pad 11 of the bearing housing 1, and providing a shim 3 according to the obtained hardness of the lower arc-shaped pad 11, wherein the hardness of the shim 3 is less than the hardness of the lower arc-shaped pad 11 of the bearing housing 1.

[0054] By making the hardness of the gasket 3 lower than that of the lower arc-shaped pad 11, the gasket 3 is more easily deformed than the lower arc-shaped pad 11 after bearing the bearing seat 1 and the support roller. On the one hand, this can improve the fit of the gasket 3, and on the other hand, the lower arc-shaped pad 11 is less likely to deform due to the gasket 3. The new positioning surface 13 can maintain a good positioning effect.

[0055] Since the bearing housings 1 of the support rollers on the same production line have the same specifications, the gaskets 3 set in the grooves 21 can be adapted to multiple support rollers. Therefore, in some embodiments, the recycling method further includes step S500: starting a grinding machine to perform test grinding operations on the support rollers.

[0056] Step S600: Obtain the roll profile accuracy of the support roller after the test grinding operation.

[0057] Step S700: If the roll profile accuracy of the support roller does not meet the processing requirements, adjust the contact state between the lower arc-shaped pad 11 and the pad 3 until the roll profile accuracy of the support roller obtained by the test grinding operation meets the processing requirements.

[0058] That is, after installing the gasket 3 in the groove 21 of the center frame 2 and using the lower arc-shaped gasket 11 of the bearing seat 1 as the new positioning surface 13, the support roller is reprocessed to determine whether the specifications or installation position of the gasket 3 can meet the requirements, thereby ensuring that the gasket 3 can be used by multiple support rollers.

[0059] In some embodiments, the recycling method further includes step S300: obtaining the real-time thickness of the gasket 3, and replacing the gasket 3 after the difference between the real-time thickness of the gasket 3 and the initial thickness of the gasket 3 is greater than the limit difference.

[0060] By replacing the shim 3 in a timely manner, the accuracy of the new positioning surface 13 can be maintained within a certain range, thereby ensuring the roll profile accuracy of the support roller processed by the grinding machine.

[0061] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0062] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0063] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0064] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0065] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A method of processing a backup roll, characterized by, include, Step 1: Mark the bearing housing where the damage to the positioning surface has reached the limit of damage; Step 2: Obtain the height difference between the height of the lower arc-shaped pad of the marked bearing housing relative to the positioning surface and the groove depth of the center rest of the grinding machine. Step 3: Provide a shim based on the obtained height difference value, and fix the shim at the bottom of the groove; Step 4: Reinstall the bearing housing onto the center frame, wherein the lower arc-shaped pad of the bearing housing contacts the top surface of the gasket, so that the lower arc-shaped pad forms a new positioning surface.

2. The method of claim 1, wherein Step one includes: Obtain the roll profile accuracy of the support roll processed by the grinding machine; If the obtained roller profile accuracy does not meet the processing requirements, check whether the positioning surfaces of the bearing seats at both ends of the support roller are damaged to the limit of damage.

3. The method of claim 1 wherein, Step two includes grinding the marked positioning surface of the bearing housing to remove the worn surface, and after removing the worn surface, obtaining the height difference value.

4. The method of claim 1 wherein, Step three includes providing two gaskets at the bottom of each groove, with the bottom surface of the lower arc-shaped pad in contact with the top surfaces of both gaskets.

5. The method of claim 1 wherein, Step three includes obtaining the groove width of the groove and providing the gasket according to the obtained groove width, wherein the width of the gasket is smaller than the groove width of the groove.

6. The method of claim 5 wherein, Step three includes fixing the gasket at the bottom of the groove, such that the sidewall of the gasket is spaced apart from the groove wall.

7. The method of claim 1 wherein, Step three includes obtaining the hardness of the lower arc-shaped pad of the bearing housing, and providing the gasket according to the obtained hardness of the lower arc-shaped pad, wherein the hardness of the gasket is less than the hardness of the lower arc-shaped pad of the bearing housing.

8. The method of claim 1 wherein, The method also includes, Step 5: Start the grinding machine to perform test grinding on the support roller; Step 6: Obtain the roll profile accuracy of the support roller after the test grinding operation; Step 7: If the roll profile accuracy of the support roller does not meet the processing requirements, adjust the contact state between the lower arc-shaped pad and the pad until the roll profile accuracy of the support roller obtained by the test grinding operation meets the processing requirements.

9. The method of claim 1 wherein, The method also includes, Step 8: Obtain the real-time thickness of the gasket. Replace the gasket after the difference between the real-time thickness of the gasket and the initial thickness of the gasket exceeds the limit difference.

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