CN113500350A - Repairing structure and repairing method for bushing on flat square of working roll - Google Patents
Repairing structure and repairing method for bushing on flat square of working roll Download PDFInfo
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- CN113500350A CN113500350A CN202110785599.4A CN202110785599A CN113500350A CN 113500350 A CN113500350 A CN 113500350A CN 202110785599 A CN202110785599 A CN 202110785599A CN 113500350 A CN113500350 A CN 113500350A
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- bushing
- screws
- mounting holes
- hole
- repairing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
The invention provides a repairing structure and a repairing method for a bushing on a flat side of a working roll, wherein the repairing structure for the bushing on the flat side of the working roll comprises mounting holes formed in the connecting position of the flat side and the bushing, the diameter of each mounting hole is larger than the fit clearance between the flat side and the bushing, the mounting holes are uniformly distributed around the bushing, and the mounting holes are threaded holes; and screws are arranged in the mounting holes, the depth of the mounting holes is greater than the length of the screws, and when the bushing is repaired, the screws are completely arranged in the mounting holes and then subjected to end face spot welding. The repair structure of flat side is simple in this scheme, and repair operation steps are few, and the realization bush that can be quick restores with being connected of flat side, returns the factory to restore and compares, and required cost is low, the effectual repair efficiency that has improved for the equipment after restoreing comes into use fast.
Description
Technical Field
The invention belongs to the field of equipment repair, and particularly relates to a repair structure and a repair method for a bush on a flat square of a working roll.
Background
When equipment is purchased, the flat square inner bushing of the hot continuous rolling working roll is in interference fit with the flat square inner hole, so that the flat square and the bushing are fixed, and in the using process, the bushing in the flat square is often loosened and falls off due to the vibration of the equipment, the abrasion of the bushing and the like, and if the equipment accident cannot be found in time, the equipment accident is caused. If the problem of liner falling occurs, the existing method can only be used for factory restoration, and a new liner is re-processed according to the flat square size after the liner is returned to the factory for installation, so that the time consumption is long, the transportation cost is high, and the quantity of the on-site normal backup rollers is influenced.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a structure and a method for repairing a work roll squarely upper bush, which can repair the bush without returning to the factory.
In order to achieve the above and other related objects, the present invention provides a repair structure for a bushing on a flat side of a work roll, comprising mounting holes formed at the connecting position of the flat side and the bushing, wherein the diameter of the mounting holes is larger than the fit clearance between the flat side and the bushing, the mounting holes are uniformly distributed around the bushing, and the mounting holes are threaded holes; and screws are arranged in the mounting holes, the depth of the mounting holes is greater than the length of the screws, and when the bushing is repaired, the screws are completely arranged in the mounting holes and then the end face spot welding is carried out.
Further, when the fit clearance between the bush and the flat square is larger than 0.1mm, a circle of bulges used for compensating the fit clearance between the bush and the flat square are arranged on the cylindrical surface of the bush.
Further, the mounting holes are provided with four in total.
In order to achieve the above objects and other related objects, the present invention provides a method for repairing a work roll edgewise upper bushing, comprising the steps of:
s1, measuring the fit clearance between the flat square and the bushing, and placing the bushing into the flat square;
s2, when the fit clearance between the flat square and the bushing is smaller than 0.1mm, drilling a hole between the flat square inner hole and the bushing, uniformly drilling the hole around the circumference of the bushing, and then tapping the drilled hole to form a mounting hole for mounting a screw;
s3, pre-installing screws in the installation holes, and screwing out the screws after the screws are completely installed;
and S4, coating thread sealing glue on the screws, reloading the screws into the mounting holes and screwing the screws tightly.
Further, after step S4 is performed, mounting hole spot welding is performed and the spot protruding portion is ground so that the welding surface is flush with the end surface of the bush.
Further, after step S1, if the fit clearance between the flat square and the bushing is greater than 0.1mm, a circle of protrusions are formed on the outer cylindrical surface of the bushing, and then the hole is tapped after the hole is drilled between the flat square and the bushing, and then the above step S3 is performed.
Further, when the outer cylindrical surface of the bushing is provided with the protrusions, the circular protrusions are formed on the cylindrical surface of the bushing by obliquely knocking the chisel.
As described above, the repair structure and repair method for the flat upper bushing of the work roll according to the present invention have the following advantageous effects:
and the spot welding of the mounting hole enables the bushing and the flat square to be stably mounted.
Because the mounting hole is the screw hole, can effectual assurance flat square and the installation stability between the bush.
The repair structure of flat side is simple in this scheme, and repair operation steps are few, and the realization bush that can be quick restores with being connected of flat side, returns the factory to restore and compares, and required cost is low, the effectual repair efficiency that has improved for the equipment after restoreing comes into use fast.
Drawings
FIG. 1 is a schematic cross-sectional view of a repair arrangement for a liner on a work roll flats in an embodiment of the present invention.
FIG. 2 is a schematic view of a repaired structure of a liner on a working roll flat side in an embodiment of the invention.
Detailed Description
Reference numerals in the drawings of the specification include: flat square 1, bush 2, mounting hole 3.
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Examples
As shown in fig. 1 and 2, the present embodiment provides a repair structure for a work roll edgewise upper liner, including: the mounting hole 3 is arranged at the connecting position of the flat square 1 and the lining 2, the mounting hole 3 is uniformly distributed along the circumference of the lining 2, the mounting hole 3 is a threaded hole, the diameter of the mounting hole 3 is larger than the fit clearance between the flat square 1 and the lining 2, a screw is arranged in the mounting hole 3, the length of the mounting hole 3 is larger than the length of the screw, and when the lining 2 is repaired, the screw is completely arranged in the mounting hole 3 and then is subjected to end face spot welding. This scheme simple structure can make and fix between flat side 1 and the bush 2 firmly.
When the fit clearance between the flat square 1 and the lining 2 is too large, a circle of bulges can be arranged on the outer cylindrical surface of the lining 2 to make up the fit clearance between the flat square 1 and the lining 2. In this embodiment, four mounting holes 3 are formed.
In addition, the embodiment also provides a method for repairing the bush on the flat side of the working roll, which comprises the following steps:
and S1, measuring the fit clearance between the flat square 1 and the bush 2, and installing the bush 2 into the flat square 1. When the fit clearance between the flat square 1 and the lining 2 is measured, the inner diameter of the flat square 1 and the outer diameter of the lining 2 are separately measured, and then the fit clearance between the flat square 1 and the lining 2 is calculated according to the difference between the inner diameter of the flat square 1 and the outer diameter of the lining 2.
S2, when the fit clearance between the flat square 1 and the bush 2 is larger than 0.1mm, a circle of bulge is arranged on the outer cylindrical surface of the bush 2. The chisel can be knocked by a hammer in the mode of arranging the protrusions, the chisel is obliquely aligned to the cylindrical surface of the bushing 2, and the protrusions similar to the fish scale shape in a circle are arranged on the cylindrical surface of the bushing 2.
And S3, drilling a hole between the inner hole of the flat square 1 and the bushing 2, and tapping after drilling to form a mounting hole 3 for mounting a screw.
And S4, inserting the four screws into the mounting holes 3, and screwing out the screws after the screws are completely installed. The screw adopts a slotted flat-end fastening screw. This step is to perform pre-installation of the screw to determine whether the aperture of the installation hole 3 is proper.
And S5, coating thread sealing glue on the screws, reloading the screws into the mounting holes 3 and screwing the screws tightly.
And S6, carrying out spot welding of the mounting hole 3 and grinding the protruding part of the welding point, so that the welding surface is flush with the end surface of the bushing 2.
If the fit clearance between the flat square 1 and the sleeve is less than 0.1mm, the step S3 is executed directly after the step S1 is executed.
The method for repairing the bush 2 has the advantages of simple repairing process and low required cost, can enable the working roll to be quickly put into use after the bush 2 is repaired, and can effectively reduce the repairing cost compared with the repair of the bush when the working roll is returned to a factory.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. The repairing structure of the bushing on the flat side of the working roller is characterized by comprising mounting holes formed in the connecting positions of the flat side and the bushing, wherein the diameter of each mounting hole is larger than the fit clearance between the flat side and the bushing, the mounting holes are uniformly distributed around the bushing, and the mounting holes are threaded holes; and screws are arranged in the mounting holes, the depth of the mounting holes is greater than the length of the screws, and when the bushing is repaired, the screws are completely arranged in the mounting holes and then the end face spot welding is carried out.
2. The repair structure of the bushing on the edgewise of the work roll according to claim 1, wherein when the fit clearance between the bushing and the edgewise is greater than 0.1mm, a circle of protrusions for making up the fit clearance between the bushing and the edgewise is provided on the cylindrical surface of the bushing.
3. The work roll edgewise bushing repair construction according to claim 1, wherein said mounting holes are provided in total of four.
4. A method of repairing a work roll edgewise liner, applied to the repair construction of a work roll edgewise liner according to any one of claims 1-3, comprising the steps of:
s1, measuring the fit clearance between the flat square and the bushing, and placing the bushing into the flat square;
s2, when the fit clearance between the flat square and the bushing is smaller than 0.1mm, drilling a hole between the flat square inner hole and the bushing, uniformly drilling the hole around the circumference of the bushing, and then tapping the drilled hole to form a mounting hole for mounting a screw;
s3, pre-installing screws in the installation holes, and screwing out the screws after the screws are completely installed;
and S4, coating thread sealing glue on the screws, reloading the screws into the mounting holes and screwing the screws tightly.
5. The method for repairing a work roll edgewise bushing according to claim 4, wherein after performing step S4, the mounting hole spot welding is performed and the spot weld bead protrusion is ground so that the weld face is flush with the bushing end face.
6. The method of claim 4, wherein after step S1, if the fit clearance between the flat and the bushing is greater than 0.1mm, the step S3 is performed after a circle of protrusions are formed on the outer cylindrical surface of the bushing, and the hole is tapped after the hole is drilled between the flat and the bushing.
7. The method for repairing the bushing on the blade of the work roll according to claim 6, wherein when the protrusion is formed on the outer cylindrical surface of the bushing, a circle of protrusion is formed on the cylindrical surface of the bushing by obliquely striking the chisel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110785599.4A CN113500350B (en) | 2021-07-12 | 2021-07-12 | Repair structure and repair method for bushing on flat square of working roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110785599.4A CN113500350B (en) | 2021-07-12 | 2021-07-12 | Repair structure and repair method for bushing on flat square of working roll |
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| CN113500350A true CN113500350A (en) | 2021-10-15 |
| CN113500350B CN113500350B (en) | 2022-08-19 |
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