Novel continuous casting roller bearing seat inner hole repairing method

Abstract

The invention relates to the technical field of machining, in particular to a novel continuous casting roller bearing seat inner hole repairing method which comprises the following steps that a bearing seat stacked ring inner hole is cut, a stacked ring groove is cut off, a mounting inner hole is formed, and the stacked ring inner hole is the inner hole where the stacked ring groove in the bearing seat is located; a welding groove is formed in the outer end face where the bearing seat mounting inner hole is located; and the bushing is mounted in the mounting inner hole, and the bushing is annular. According to the embodiment of the invention, the original stacked ring groove is completely cut off and then the insert bush is embedded into the position of the original stacked ring groove, and the carrier of the original stacked ring groove is replaced by the homogeneous insert bush, so that the stacked ring groove formed after cutting can adapt to a high-strength use scene, and the new stacked ring groove is separated from the welding position, so that the welding quality is improved. The situation that a new stacked ring groove is not durable due to welding is avoided, the repaired bearing seat does not interfere with installation of the sealing clamping ring, and the using effect of the repaired bearing seat is remarkably improved.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical processing, and in particular to a novel method for repairing the inner hole of a continuous casting roller bearing seat. Background Art

[0002] After long-term use, the stacking ring groove of the continuous casting roller bearing seat will be seriously worn and deformed, which will cause the stacking ring to shift, resulting in poor bearing sealing and affecting the service life of the roller.

[0003] In the prior art, when the bearing seat stacking ring groove is severely worn and cannot be repaired and used again, it is directly scrapped and no longer used; Figure 1 As shown in the figure, when the bearing seat stacking ring groove is lightly worn, Figure 2 The stacking ring groove portion shown in the figure is then turned to repair the worn stacking ring groove portion, so as to achieve the purpose of repairing the inner hole where the stacking ring groove of the bearing seat is located.

[0004] This repair method reduces the number of scrapped bearing seats to a certain extent and saves production costs. However, this method is prone to welding defects such as pores and slag inclusions when repairing the inner hole where the stacking ring groove of the bearing seat is located. In addition, high points are prone to occur in the inner hole, which leads to jamming during the assembly of the stacking ring. Overall, the use effect is not good. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present application provides a novel method for repairing the inner hole of a continuous casting roller bearing seat. The embodiment of the present application completely cuts out the original stacking ring groove and then uses an insert sleeve to embed the original stacking ring groove at its position, replacing the carrier of the original stacking ring groove with a homogeneous insert sleeve, so that the stacking ring groove formed after cutting can adapt to high-intensity usage scenarios, and the new stacking ring groove is separated from the welding position, avoiding the situation where the new stacking ring groove is not durable due to welding, and the repaired bearing seat will not interfere with the installation of the sealing retaining ring, thereby significantly improving the use effect of the repaired bearing seat.

[0006] The above application objectives of this application are achieved through the following technical solutions: A novel method for repairing the inner hole of a continuous casting roller bearing seat comprises the following steps: Cutting the inner hole of the stacking ring of the bearing seat, cutting off the stacking ring groove, and forming a mounting inner hole, wherein the stacking ring inner hole is the inner hole where the stacking ring groove in the bearing seat is located; A welding groove is provided on the outer end surface where the inner hole of the bearing seat is installed; Installing the insert sleeve in the installation inner hole, the insert sleeve is annular, and the outer side of the insert sleeve and the welding groove form a welding area; The sleeve is welded to the bearing seat, and the molten pool during the sleeve welding process is located in the welding area; Annealing the bearing seat after welding; Cut the inner hole of the insert sleeve and open a stacking ring groove in the insert sleeve, so that the inner hole of the insert sleeve is consistent with the inner hole of the stacking ring of the original bearing seat, and the position and size of the stacking ring groove in the insert sleeve are consistent with those of the stacking ring groove of the original bearing seat; Cut the end face of the insert.

[0007] Optionally, the annealing treatment of the bearing seat after welding includes: Heat the welded bearing seat to 400°C, keep it warm for 2 hours and then cool it in the furnace.

[0008] Optionally, the insert sleeve is interference fit with the mounting inner hole.

[0009] Optionally, the cutting insert inner hole comprises: Align the inner hole of the bearing of the inner support bearing seat; A stacking ring groove is provided in the insert sleeve; Cut the inner side of the sleeve to make the inner hole of the sleeve consistent with the inner hole diameter of the original bearing seat stack ring.

[0010] Optionally, installing the insert sleeve in the installation inner hole includes: Insert the first end of the insert sleeve into the installation inner hole until the first end of the insert sleeve passes through the plane where the bearing seat oil seal is located, and the second end of the insert sleeve does not enter the installation inner hole.

[0011] Optionally, the end face of the cutting insert comprises: Align the inner hole of the bearing of the inner support bearing seat; Cutting the second end surface of the insert; Turn the bearing seat around, insert the inner support into the inner hole and align it; The first end surface of the insert sleeve is cut so that the portion of the first end of the insert sleeve that passes through the plane where the bearing seat oil seal is located is cut off.

[0012] Optionally, the welding area between the insert sleeve and the bearing seat does not extend into the stacking ring groove.

[0013] In summary, this application has the following beneficial technical effects: The embodiment of the present application completely cuts out the original stacking ring groove and then uses an insert sleeve to embed the original stacking ring groove in its position, replacing the carrier of the original stacking ring groove with a homogeneous insert sleeve, so that the stacking ring groove formed after cutting can adapt to high-intensity usage scenarios, and the new stacking ring groove is separated from the welding position, avoiding the situation where the new stacking ring groove is not durable due to welding, and also ensuring that the repaired bearing seat will not interfere with the installation of the sealing retaining ring, thereby significantly improving the use effect of the repaired bearing seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of damage to the stacking ring groove of the bearing seat in the prior art; Figure 2 It is a schematic diagram of the prior art bearing seat stacking ring groove repair welding; Figure 3 This is a schematic diagram of damage to the stacking ring groove of a bearing seat according to an embodiment of the present application; Figure 4 This is a schematic diagram of cutting the inner hole of the stacked ring of the bearing seat in one embodiment of the present application; Figure 5 This is a schematic diagram of the installation of the insert sleeve in one embodiment of the present application; Figure 6 This is a schematic diagram of welding of a sleeve in one embodiment of the present application; Figure 7 It is a schematic diagram of the position of the insert sleeve in one embodiment of the present application. DETAILED DESCRIPTION

[0015] The following is combined with Figure 3 -Attached Figure 6 This application is described in further detail.

[0016] The embodiment of the present application provides a novel method for repairing the inner hole of a continuous casting roller bearing seat, comprising the following steps: S101, cutting the inner hole where the stacking ring groove of the bearing seat is located, removing the stacking ring groove, increasing the inner diameter of the inner hole where the stacking ring groove of the bearing seat is located to form a mounting inner hole, and the inner hole where the stacking ring groove of the bearing seat is located is also the inner hole of the skeleton oil seal marked in the attached figure; S102, chamfering an end face of the bearing seat away from the bearing inner hole for mounting the bearing, that is, chamfering the outer end face of the bearing seat where the mounting inner hole is located, wherein the plane where the chamfered outer end is located is located at the junction of the outer end face of the bearing seat and the mounting inner hole, and the chamfer extends toward the mounting inner hole to form a welding groove, and the diameter of the virtual circle where the side of the chamfer away from the mounting inner hole is located is greater than the inner diameter of the mounting inner hole; S103, installing a metal insert sleeve into the installation inner hole, wherein in the installed state, the outer side of the insert sleeve is in contact with the inner side surface of the installation inner hole, the insert sleeve is in the shape of a circular ring column, and the outer side surface of the insert sleeve and the surface where the chamfer is located form a semi-open welding area, and the opening of the welding area faces away from the inner hole of the bearing seat; S104, welding the sleeve to the bearing seat, wherein the molten pool during the sleeve welding process is located in the welding area, and the welding area is polished after the welding is completed; S105, heating and keeping the bearing seat and the sleeve after welding, and cooling them with the furnace; S106, cutting the inner hole of the insert sleeve and opening a stacking ring groove in the insert sleeve, so that the inner hole of the insert sleeve is consistent with the inner hole of the stacking ring of the original bearing seat, and the position and size of the stacking ring groove in the insert sleeve are consistent with those of the stacking ring groove of the original bearing seat; S107, cutting the end face of the insert to complete the repair.

[0017] The following is a further introduction based on specific usage scenarios.

[0018] The bearing seat has a bearing inner hole for installing the bearing and a stacking ring inner hole with a stacking ring groove. The stacking ring inner hole is also the skeleton oil seal inner hole marked in the attached figure. The bearing inner hole and the stacking ring inner hole are respectively located at the two ends of the bearing seat. The two inner holes are connected. The stacking ring groove is opened on the inner wall of the stacking ring inner hole. The stacking ring groove has two parallel side walls, an opening located on the inner side of the stacking ring inner hole, and an annular bottom surface that is coaxial with the inner wall of the stacking ring inner hole and has a diameter greater than the inner diameter of the stacking ring inner hole. When any part of the stacking ring groove is damaged and needs to be repaired: First, step S101 is performed to turn the inner hole of the stacking ring of the bearing seat so that the damaged stacking ring groove is completely removed, and an installation inner hole is formed in the original inner hole of the stacking ring of the bearing seat. The installation inner hole replaces the position of the original inner hole of the stacking ring of the bearing seat, and the inner diameter of the installation inner hole is larger than the inner diameter of the annular bottom surface of the stacking ring groove. After the inner hole of the stacking ring of the bearing seat is cut, the inner wall of the installation inner hole is smooth; Then, step S102 is performed to chamfer one end of the bearing seat away from the bearing inner hole for mounting the bearing, the chamfered area is annular, the chamfer extends in the direction of the mounting inner hole and the bearing inner hole, and when the direction from the mounting inner hole to the bearing inner hole is taken as the positive direction, the inner diameter of the chamfer gradually decreases along the positive direction, and the diameter of the chamfer on the end face of the bearing seat is larger than the diameter of the mounting inner hole; In step S103, a cylindrical sleeve is installed in the installation inner hole, and the outer side surface of one end of the sleeve away from the bearing inner hole and the chamfered surface of the bearing seat end face form a semi-open welding area; Then, step S104 is performed to weld the sleeve to the bearing seat. The molten pool during the sleeve welding process is located in the welding area. After the welding step is completed, grinding is performed so that the sleeve and the bearing seat form a whole. Then, step S105 is performed to anneal the entire bearing seat after welding to eliminate stress caused by welding; In step S106, the inner hole of the sleeve is cut, including forming a stacking ring groove inside the sleeve and cutting the inner side of the sleeve, so that the inner hole of the sleeve is consistent with the inner hole of the stacking ring of the original bearing seat, and the position and size of the stacking ring groove of the sleeve are consistent with those of the stacking ring groove of the original bearing seat; S107, cutting the end face of the sleeve to complete the repair of the bearing seat.

[0019] The repair of the bearing seat is completed through the above steps. From the perspective of the stability of the stacking ring groove, in the embodiment of the present application, the damaged stacking ring groove of the bearing seat is removed as a whole, and then a sleeve is embedded in the original position of the stacking ring groove. After the sleeve is welded, its inner hole is cut to form a new stacking ring groove and inner surface. In this way, the formed new stacking ring groove is completely in the sleeve, the carrier of the new stacking ring groove is a homogeneous material, and there are no inclusions and transition areas on the stacking ring groove. When in use, the new stacking ring groove can adapt to a sealing environment with variable stress, and the inner surface of the sleeve that has been turned will not produce high points or other blocking parts that hinder the installation of the sealing retaining ring, thereby improving the practicality of the bearing seat.

[0020] From the perspective of connection reliability, the carrier of the stacking ring groove in the embodiment of the present application is a sleeve, which is connected to the bearing seat by welding. The area where the stacking ring groove is located does not contact the welding part, that is, the stacking ring groove and the welding part are separated inside the sleeve, thereby preventing the sealing ring from contacting the welding part in the stacking ring groove, and significantly improving the reliability of the bearing seat after repair; In general, the embodiment of the present application completely cuts out the original stacking ring groove and then uses an insert sleeve to embed the original stacking ring groove in its position, replacing the carrier of the original stacking ring groove with a homogeneous insert sleeve, so that the stacking ring groove formed after cutting can adapt to high-intensity usage scenarios, and the new stacking ring groove is separated from the welding position, avoiding the situation where the new stacking ring groove is not durable due to welding, and also ensuring that the repaired bearing seat will not interfere with the installation of the sealing retaining ring, thereby significantly improving the use effect of the repaired bearing seat.

[0021] In some possible implementations of the embodiments of the present application, the welding area between the sleeve and the bearing seat does not extend into the stacking ring groove. In this way, the new stacking ring groove can be suitable for stacking rings whose stress constantly changes during use, which significantly improves the use effect of the repaired bearing seat.

[0022] The insert is used to fill the installation inner hole and serve as a carrier of the stacking ring groove. In a feasible implementation method of the embodiment of the present application, the outer side surface of the seamless steel pipe is cut so that the outer side surface diameter of the seamless steel pipe can meet the requirement that after being inserted into the installation inner hole, the outer side surface of the seamless steel pipe is tightly attached to the inner wall of the installation inner hole. After the outer circle of the seamless steel pipe is cut, the processed seamless steel pipe is cut to form the insert in the embodiment of the present application.

[0023] When the insert sleeve is installed in the mounting inner hole, the insert sleeve is inserted into the mounting inner hole by plugging. In some possible implementation methods of the embodiments of the present application, the insert sleeve and the mounting inner hole are interference fit. In this way, when the welding is completed and used, in addition to the force on the welding point between the insert sleeve and the bearing seat, the outer side surface of the insert sleeve and the inner side surface of the mounting inner hole of the bearing seat are tightly attached to generate friction, which disperses the force at the welding point between the insert sleeve and the bearing seat, so that the overall force of the bearing seat embedded with the insert sleeve is more uniform and stable, thereby improving the use effect.

[0024] In step S103, refer to Figure 7 , insert the sleeve into the installation inner hole. In some possible implementation methods of the embodiments of the present application, the first end of the sleeve is inserted into the installation inner hole until the first end of the sleeve passes through the plane where the bearing seat oil seal is located, and the second end of the sleeve does not enter the installation inner hole. In this way, the two ends of the sleeve are respectively outside the two ends of the inner hole of the original bearing seat stacking ring, which provides a processing allowance for the subsequent cutting end face, so that the position of the two ends of the sleeve can be more closely matched to the size of the original bearing seat, significantly improving the use effect of the repaired bearing seat.

[0025] In step S105, the bearing seat and the sleeve are annealed as a whole in order to eliminate the internal stress caused by welding between the sleeve and the bearing seat. In a feasible implementation method of the embodiment of the present application, the bearing seat after welding can be heated to 400°C, kept warm for 2 hours, and then cooled with the furnace to eliminate the internal stress.

[0026] In step S106, the inner hole of the sleeve is cut. The cutting includes forming a stacking ring groove on the inner hole of the sleeve and turning the inner circle of the inner hole of the sleeve. In the embodiment of the present application, the specific steps may be: Step S601, using the inner hole of the bearing used to install the bearing in the bearing seat as a reference, using an inner support to support the inner hole of the bearing, installing the bearing seat on a lathe, and aligning it; Step S602, using a tool to open a stacking ring groove in the insert; Step S603, after the stacking ring groove is formed, the inner side surface of the sleeve is cut to make the inner hole of the sleeve consistent with the inner hole diameter of the original bearing seat stacking ring, remove part of the burrs generated by the stacking ring groove, and make the inner wall of the sleeve inner hole smooth.

[0027] The above steps complete the turning of the inside of the sleeve, so that the position of the newly formed stacking ring groove is suitable for use, and the inside of the sleeve becomes smooth after cutting, so that the sealing ring can be easily installed in the stacking ring groove, which significantly improves the use effect of the repaired bearing seat.

[0028] Step S107 is to cut both ends of the insert so that the end surfaces of both ends of the insert are adapted to the shape and size of the original bearing seat. In some possible implementations of the embodiment of the present application, cutting the end surface of the insert may specifically include: Step S701, using the inner hole of the bearing seat as a reference, using an inner support fixture, the inner hole of the bearing seat is supported, the bearing seat is installed on a lathe, and alignment is performed; Step S702, using a tool to cut the second end face of the insert, the second end face of the insert being the end that does not enter the mounting inner hole; Step S703, turn the bearing seat around, use the inner hole of the sleeve as a reference, support the inner hole of the sleeve and align it; Step S704, cutting the first end face of the insert sleeve, the first end face of the insert sleeve being the end that enters the installation inner hole, so that the portion of the first end of the insert sleeve that passes through the plane where the bearing seat oil seal is located is cut off.

[0029] Through the above steps, both ends of the insert are cut, so that the repaired bearing seat can restore its original shape and size, which significantly improves the use effect of the repaired bearing seat.

[0030] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A novel method for repairing the inner hole of a continuous casting roller bearing seat, characterized in that: The steps include: Cutting the inner hole of the stacking ring of the bearing seat, cutting off the stacking ring groove, and forming a mounting inner hole, wherein the stacking ring inner hole is the inner hole where the stacking ring groove in the bearing seat is located; A welding groove is provided on the outer end surface where the inner hole of the bearing seat is installed; Installing the insert sleeve in the installation inner hole, the insert sleeve is annular, and the outer side of the insert sleeve and the welding groove form a welding area; The sleeve is welded to the bearing seat, and the molten pool during the sleeve welding process is located in the welding area; Annealing the bearing seat after welding; Cut the inner hole of the insert sleeve and open a stacking ring groove in the insert sleeve, so that the inner hole of the insert sleeve is consistent with the inner hole of the stacking ring of the original bearing seat, and the position and size of the stacking ring groove in the insert sleeve are consistent with those of the stacking ring groove of the original bearing seat; Cut the end face of the insert.

2. A novel method for repairing the inner hole of a continuous casting roller bearing seat according to claim 1, characterized in that: The insert sleeve is interference fit with the installation inner hole.

3. A novel method for repairing the inner hole of a continuous casting roller bearing seat according to claim 1, characterized in that: The annealing treatment of the bearing seat after welding comprises: Heat the welded bearing seat to 400°C, keep it warm for 2 hours and then cool it in the furnace.

4. A novel method for repairing the inner hole of a continuous casting roller bearing seat according to claim 1, characterized in that: The inner hole of the cutting sleeve comprises: Align the inner hole of the bearing of the inner support bearing seat; A stacking ring groove is provided in the insert sleeve; Cut the inner side of the sleeve to make the inner hole of the sleeve consistent with the inner hole diameter of the original bearing seat stack ring.

5. A novel method for repairing the inner hole of a continuous casting roller bearing seat according to claim 4, characterized in that: The step of installing the insert sleeve in the installation inner hole comprises: Insert the first end of the insert sleeve into the installation inner hole until the first end of the insert sleeve passes through the plane where the bearing seat oil seal is located, and the second end of the insert sleeve does not enter the installation inner hole.

6. A novel method for repairing the inner hole of a continuous casting roller bearing seat according to claim 5, characterized in that: The end face of the cutting insert comprises: Align the inner hole of the bearing of the inner support bearing seat; Cutting the second end surface of the insert; Turn the bearing seat around, insert the inner support into the inner hole and align it; The first end surface of the insert sleeve is cut so that the portion of the first end of the insert sleeve that passes through the plane where the bearing seat oil seal is located is cut off.

7. A novel method for repairing the inner hole of a continuous casting roller bearing seat according to claim 6, characterized in that: The welding area between the sleeve and the bearing seat does not extend into the stacking ring groove.

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