KR20170012723A - Apparatus for polishing sleeve and method for manufacturing sleeve using the same - Google Patents

Apparatus for polishing sleeve and method for manufacturing sleeve using the same Download PDF

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Publication number
KR20170012723A
KR20170012723A KR1020150104102A KR20150104102A KR20170012723A KR 20170012723 A KR20170012723 A KR 20170012723A KR 1020150104102 A KR1020150104102 A KR 1020150104102A KR 20150104102 A KR20150104102 A KR 20150104102A KR 20170012723 A KR20170012723 A KR 20170012723A
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KR
South Korea
Prior art keywords
polishing
sleeve
outer circumferential
circumferential surface
film
Prior art date
Application number
KR1020150104102A
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Korean (ko)
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KR101760568B1 (en
Inventor
이재창
안춘근
조성현
권혁주
Original Assignee
주식회사 포스코
주식회사 한스코
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Priority to KR1020150104102A priority Critical patent/KR101760568B1/en
Publication of KR20170012723A publication Critical patent/KR20170012723A/en
Application granted granted Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
    • B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
    • B24B29/04—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces for rotationally symmetrical workpieces, e.g. ball-, cylinder- or cone-shaped workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/003—Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
    • B24B5/047—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally of workpieces turning about a vertical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Abstract

The present invention relates to a sleeve polishing apparatus, which is able to grind and polish a mirror surface in the same polishing apparatus to secure an improved roughness on an outer circumferential surface of a sleeve. According to an embodiment of the present invention, the sleeve polishing apparatus is an apparatus which polishes an outer circumferential surface of a sleeve which makes an oil film bearing which is placed in a backup roll choke of a rolling apparatus, and which comprises: a bottom base which provides a space for polishing an outer circumferential surface of a cylindrical sleeve; a settling means which is placed on the bottom base and on which the sleeve is settled to rotate; a top base which is placed on top of the bottom base with a distance and which has a RAM which is vertically moved; a first polishing means which is replaceably installed on the RAM of the top base and which has a polishing grindstone, which comes in contact with an outer circumferential surface of the sleeve, to polish the outer circumferential surface of the sleeve; and a second polishing means which is replaceably placed on the RAM of the top base and is installed in turn with the first polishing means and which polishes the outer circumferential surface of the sleeve into a mirror surface by using a polishing film which is continuously supplied to come in contact with the outer circumferential surface of the sleeve.

Description

[0001] DESCRIPTION [0002] APPARATUS FOR POLISHING SLEEVE AND METHOD FOR MANUFACTURING SLEEVE USING THE SAME [0003]

The present invention relates to a sleeve polishing apparatus and a method of manufacturing a sleeve using the sleeve polishing apparatus. More particularly, the present invention relates to a sleeve polishing apparatus and a sleeve polishing apparatus which can grind and polish a mirror surface in the same polishing apparatus to secure an improved outer circumferential surface And a method of manufacturing a sleeve using the same.

In general, the steel process consists of a steelmaking process, a steelmaking process, a casting process, and a rolling process. Molten steel, from which impurities have been removed from iron ore as a raw material, is injected into a mold of a continuous casting process, , BLOOM or billet, and then subject to a suitable rolling process according to the final products such as wire rod, coil, thin plate, and heavy plate which are finally produced.

In general, a rolling mill provided in a rolling process includes a work roll which is directly contacted with a rolled material and rolled, and a work roll which is supported by the work roll to prevent a bending phenomenon due to a load during rolling. A support roll for supporting upper and lower support rolls for smooth rotation of the upper and lower support rolls under severe rolling conditions in which high load and impact are required, And upper and lower support roll chocks provided at both ends of the lower support roll, and work roll chocks provided at both ends of the work roll to support and operate the work roll.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a configuration diagram showing an assembling structure of a support roll and a support roll choke.

As shown in FIG. 1, the support roll chock 20 surrounds and supports the end of the support roll 10. At this time, the oil film bearing 30 is assembled to the inner diameter of the support roll chock 20 so as to maintain a constant thickness of the rolled material with high load and impact at the time of rolling.

The oil film bearing 30 is composed of a shell 31 and a sleeve 32. In particular, the shell 31 is formed in a cylindrical shape and the outer peripheral surface of the sleeve 32 reduces the rolling friction resistance during rolling , And a very smooth surface illuminance state is required to suppress the formation of carbon (carbon surface), such as a mirror surface. In order to satisfy the surface roughness Ra of 0.1 or less as in the case of the mirror surface, there is a method of polishing the sleeve 32 after the sleeve 32 is moved to the mirror polishing apparatus using a polishing film , Which is expensive to purchase equipment, and in particular, the transfer of sleeves leads to a problem of rising production costs due to the lack of productivity.

Conventionally, the sleeve is subjected to a polishing operation using finishing grinding stone after finishing in a processing machine, but when using a grinding stone for grinding, the surface roughness is as low as Ra0.4, which is a problem in rolling operation have.

In order to solve this problem, there is a need to improve an apparatus and a method for polishing the peripheral surface roughness of the sleeve to the mirror-surface level without moving the processed sleeve in the manufacture of the sleeve.

Open Patent Publication No. 10-1989-0000207 (Mar. 13, 1989)

The present invention provides a sleeve polishing apparatus capable of continuously grinding and polishing a mirror surface in the same polishing apparatus and securing the illuminance of the outer circumferential surface of a sleeve at a mirror surface level, and a method of manufacturing a sleeve using the same.

A sleeve polishing apparatus according to an embodiment of the present invention is an apparatus for polishing an outer circumferential surface of a sleeve constituting an oil film bearing provided in a support roll choke of a rolling apparatus, A lower base for providing a lower electrode; A mounting means provided on the lower base for receiving and rotating the sleeve; An upper base spaced apart from an upper portion of the lower base and having a RAM that is moved in a vertical direction; A primary polishing means provided in the upper base so as to be replaceable and provided with a polishing grindstone that contacts the outer peripheral surface of the sleeve to polish the outer peripheral surface of the sleeve; A second polishing step of polishing the outer circumferential surface of the sleeve by using a polishing film which is provided to be interchangeable with the ram of the upper base and which is provided alternately with the primary polishing means and is continuously supplied to contact the outer circumferential surface of the sleeve, And polishing means.

Wherein the mounting means comprises a turntable on which an end of either one of longitudinally opposite ends of the sleeve is seated and fixed and a rotating shaft mounted on an upper surface of the lower base and connected to a lower center of the turntable to rotate the turntable, The ram of the upper base is installed around the upper portion of the turntable, and at least one of the rotary shaft and the ram is installed to be movable in a horizontal direction.

Wherein the primary polishing means and the secondary polishing means each have a first fastening jig and a second fastening jig for engaging with the ram provided on the upper base, The first fastening jig and the second fastening jig, which are respectively provided in the car polishing unit, are installed.

Wherein the secondary polishing means comprises a film polishing unit for providing a polishing film such that the polishing film continuously contacts the outer peripheral surface of the sleeve; And a support unit installed to vary the installation angle of the film polishing unit, and the second fastening jig is connected to the support unit.

The film polishing unit comprising: a main body connected to the supporting unit; A pickup roll installed to be driven by the main body to pull out the abrasive film; A plurality of guide rollers installed on the main body and guiding a moving path of the polishing film wound on the winding roll; A tightening roller installed on the main body and closely contacting the outer circumferential surface of the sleeve for contacting the abrasive film while being guided by the guide roller; A take-up reel for taking up the abrasive film which is abraded on the outer circumferential surface of the sleeve while being in contact with the outer circumferential surface of the sleeve by the contact roller; And a cylinder for bringing the contact roller into close contact with the outer circumferential surface of the sleeve.

Wherein the supporting unit includes a tilting bar on which the second fastening jig is installed; A tilting shaft connecting the main body to the tilting bar, the tilting shaft turning the main body so as to vary the installation angle of the tilting bar; And a tilting fixed bar extending from an end of the tilting bar to fix an end of the main body to which an installation angle is variable.

Meanwhile, a method of manufacturing a sleeve according to an embodiment of the present invention is a method of manufacturing a sleeve constituting an oil film bearing provided in a support roll choke of a rolling apparatus, comprising the steps of: forming a hollow cylindrical sleeve A body forming step of forming a body for a body; A first machining step of roughing the body; A heat treatment step of heat treating the body; A second machining step of machining at least one of an intermediate cutting and a finishing so as to form the shape of the final sleeve by machining the body; A first polishing means provided with a polishing grindstone is mounted on the machining apparatus so as not to move the body from the machining apparatus in which the second mechanical machining step has been performed so that the outer circumferential surface of the body is firstly polished, And a continuous polishing step in which the means is replaced with a secondary polishing means provided with a polishing film to continuously perform secondary polishing of the outer peripheral surface of the primary polished body.

In the continuous polishing step, it is preferable that the primary polishing is performed so that the maximum roughness of the outer circumferential surface of the sleeve becomes Ra 0.4, and the secondary polishing is performed such that the maximum roughness of the outer circumferential surface of the sleeve becomes Ra 0.1.

According to the embodiment of the present invention, since grinding and polishing of the mirror surface can be continuously performed in the same apparatus without moving the processed sleeve, the surface roughness of the sleeve outer circumferential surface can be maintained at a level lower than Ra0.1 It is possible to polish very smoothly and obtain a surface state of a mirror surface.

Further, since the installation angle of the secondary polishing means for polishing the outer circumferential surface of the sleeve to the mirror surface level can be adjusted, the sleeve can be polished even in the case of a sleeve having a taper surface shape.

It is possible to complete the polishing process from the previous machining equipment without moving the product to the special polishing equipment at the time of polishing, thereby increasing the productivity and reducing the processing cost.

By ensuring the surface roughness of the outer surface of the sleeve, the rolling friction resistance is reduced during rolling, thereby reducing the rolling equipment load and suppressing the formation of carbon in the lubricating oil, thereby improving the working efficiency by shortening the maintenance time.

Fig. 1 is a structural view showing an assembling structure of the support roll and the support roll chocks,
FIG. 2 is a view showing a sleeve polishing apparatus according to an embodiment of the present invention,
FIGS. 3 and 4 are views showing a secondary polishing means according to an embodiment of the present invention,
5A and 5B are views showing the use state of the sleeve polishing apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Wherein like reference numerals refer to like elements throughout.

First, a sleeve manufactured using the sleeve polishing apparatus according to an embodiment of the present invention is a sleeve constituting an oil film bearing provided in a support roll chock of a rolling apparatus, and the sleeve is a cylindrical shape having both ends connected to each other Respectively. Of course, the sleeve polishing apparatus proposed by the present invention is not limited to the manufacture of the sleeve constituting the oil film bearing, but may be applied to the outer circumferential surface or inner circumferential surface polishing of various products having a cylindrical shape.

FIG. 2 is a view showing a sleeve polishing apparatus according to an embodiment of the present invention, FIGS. 3 and 4 are views showing a secondary polishing means according to an embodiment of the present invention, and FIGS. 5A and 5B are cross- FIG. 5 is a view showing a state of use of a sleeve polishing apparatus according to an embodiment of the present invention. FIG.

As shown in the drawing, a sleeve polishing apparatus according to an embodiment of the present invention includes a lower base 100, a seating unit 200, an upper base 300, a primary polishing unit 400, and a secondary polishing unit 500 ).

The lower base 100 may be a plate or a frame provided parallel to the ground, as means for providing a space for polishing the outer circumferential surface of the cylindrical sleeve 32. In this embodiment, a plate type is applied.

The seating means 200 is provided on the lower base 100 and rotates to rotate the sleeve 32 while the sleeve 32 is seated and fixed. The seating means 200 includes a turntable 210 And a rotating shaft 220 installed on the upper surface of the lower base 100 and connected to the lower center of the turntable 210 to rotate the turntable 210. At this time, the sleeve 32 is seated so that the end of either one of the longitudinally opposite ends is disposed on the upper surface of the turntable 210. The turntable 210 may be provided with clamping means (not shown) for fixing the sleeve 32 to the upper surface of the turntable 210. A driving unit (not shown) such as a driving motor that rotates the turntable 210 by driving the rotating shaft 220 may be connected to the rotating shaft 220.

The upper base 300 is spaced apart from the upper portion of the lower base 100 and includes a RAM 310 which is moved in the vertical direction. At this time, the holder 320 is installed to replace the various processing or polishing means.

At this time, the ram 310 of the upper base 300 is installed near the upper portion of the turntable 210, and at least one of the rotating shaft 220 and the ram 310 is installed to be movable in the horizontal direction, Even if the outer diameter of the sleeve 32 seated on the sleeve 32 changes, the polishing can be performed. In this embodiment, it is preferable that the ram 310 provided on the upper base 300 is installed to be movable in the horizontal direction.

The configuration of the CNC Turning Machine that processes the cylindrical base product while rotating the lower base 100, the seating means 200, the upper base 300, and the RAM 310 may be applied.

The primary polishing means 400 is provided to be replaceable in the ram 310 of the upper base 300 and is a means for grinding the outer circumferential surface of the sleeve 32 in a primary order. In this embodiment, The first grinding means 400 is constructed by applying the grinding stone 410. The primary polishing means 400 includes a polishing grindstone 410 and a first fastening jig 420 capable of mounting the polishing grindstone 410 to the holder 320 provided in the ram 310 do.

The shape of the first fastening jig 420 is not limited to a specific shape, but may be changed and applied in various ways corresponding to the shape of the holder 320 provided on the ram 310.

The secondary polishing means 500 is provided to be replaceable in the ram 310 of the upper base 300. The secondary polishing means 500 is disposed on the outer peripheral surface of the sleeve 32 which is alternately provided with the primary polishing means 400, In this embodiment, the secondary polishing means 500 is constructed by applying the polishing film 519. In this case, Thus, the secondary polishing means 500 includes a film polishing unit 510 for providing the polishing film 519 such that the polishing film 519 continuously contacts the outer peripheral surface of the sleeve 32; And a support unit 530 installed so that the installation angle of the film polishing unit 510 is variable.

The film polishing unit 510 is a unit for continuously supplying an abrasive film 519 for abrading the outer circumferential surface of the sleeve 32 to the outer circumferential surface of the sleeve 32 in contact with the outer circumferential surface of the sleeve 32, A main body 511 connected to the unit 530; A pickup roll 512 which is installed to be driven by the main body 511 and to pull the polishing film 519; A plurality of guide rollers 514 installed on the main body 511 and guiding a moving path of the polishing film 519 wound by the take-up roll 512; A contact roller 515 installed on the main body 511 and contacting the abrasive film 519 while being guided by the guide roller 514 in contact with the outer circumferential surface of the sleeve 32; And a take-up reel 513 for winding the abrasive film 519 which is brought into contact with the outer circumferential surface of the sleeve 32 by the contact roller 515 while polishing the outer circumferential surface of the sleeve 32.

3, the main body 511 includes a take-up reel 512, a plurality of guide rollers 514, a contact roller 515 and a take-up reel 513 which are spaced apart from each other. A drive means (not shown) such as a separate drive motor for driving the take-up reel 512 and the take-up reel 513 will be provided. The take-up reel 512 is driven in the direction to unwind the abrasive film 519 and the take-up reel 513 is driven in the direction to wind the abrasive film 519, The film 519 is moved while being guided by the plurality of guide rollers 514 and the contact rollers 515 and brought into close contact with the outer circumferential surface of the sleeve 32 to be wound on the take-up reel 513.

Cylinders 517 and 518 are connected to the contact roller 515 to operate the contact roller 515 in close contact with the outer peripheral surface of the sleeve 32. The cylinders 517 and 518 are constituted by a cylinder body 517 and a cylinder rod 518 which are operated by pneumatic pressure and a roller support 516 provided with a contact roller 515 is connected to the cylinder rod 518. When the cylinder main body 511 is supplied with air pressure, the cylinder rod 518 advances to move the roller support 516 in the direction of the outer peripheral surface of the sleeve 32, 515 are in contact with the outer circumferential surface of the sleeve 32 while being in close contact with each other.

Meanwhile, in this embodiment, the angle of installation of the film polishing unit 510 can be varied by the support unit 530, so that even when the outer peripheral surface of the sleeve 32 is inclined, the outer peripheral surface of the sleeve 32 can be polished have.

The support unit 530 is a unit for varying the installation angle of the film polishing unit 510, and includes a tilting bar 531; A tilting shaft 532 connecting the main body 511 to the tilting bar 531 and rotating the main body 511 so as to vary an installation angle with respect to the tilting bar 531; And a tilting fixture 533 extending from an end of the tilting bar 531 to fix an end of the main body 511 whose installation angle is variable.

The tilting bar 531 is formed with a second fastening jig 520 capable of mounting the tilting bar 531 on the holder 320 of the ram 310. Like the first fastening jig 420, the shape of the second fastening jig 520 is not limited to a specific shape, but may be changed and applied in various ways corresponding to the shape of the holder 320 provided on the ram 310 It will be possible.

The tilting shaft 532 is a means for connecting the main body 511 of the film polishing unit 510 to the tilting bar 531 so as to be rotatable. The tilting shaft 532 may be implemented by applying a fastening method such as a hinge connection.

The tilting stand 533 may be applied in various manners as means for rotating the body 511 of the film polishing unit 510 on the tilting bar 531 to vary the angle of installation and maintaining the state. For example, in the present embodiment, the connection shaft may serve as an intermediary for maintaining the interval between the main body 511 and the tilting rest 533. At this time, since the connecting shaft is operated by a cylinder or the like whose operation is controlled by the control unit, the tilting angle of the main body 511 can be controlled by the control of the control unit.

The state of use of the sleeve polishing apparatus according to an embodiment of the present invention and the method of manufacturing the sleeve using the same will now be described.

First, in order to form a sleeve, a base material is forged to manufacture a cylindrical sleeve-forming body having a hollow interior. (Body forming step)

Then, the forged body is subjected to a heat treatment (normalizing), followed by roughing so as to have a working margin of 3 to 5 mm on one side (first mechanical processing step).

Then, the rough-machined body is subjected to quenching and tempering (heat treatment step)

The body subjected to the heat treatment is mounted on the machining apparatus, and at least one of the machining and the finishing machining is performed so as to form the shape of the final sleeve (second mechanical machining step). At this time, It is preferable to apply a machining tip for machining or finishing to the ram of the polishing apparatus.

Then, the body subjected to the secondary machining is firstly subjected to primary grinding using the primary grinding means provided with the grinding stone, without moving the body subjected to the second machining step (in this embodiment, the grinding apparatus) In the same apparatus, the outer circumferential surface of the primary-polished body is successively subjected to secondary polishing using secondary polishing means provided with an abrasive film (continuous polishing step).

In this case, the outer circumferential surface of the sleeve is first polished by grinding the outer circumferential surface of the sleeve using a grinding grindstone so that the maximum roughness of the outer circumferential surface of the sleeve becomes Ra 0.4.

The outer circumferential surface of the sleeve is secondarily polished using a polishing film to polish the outer circumferential surface of the sleeve in a state where the primary polished surface is polished with a polishing grindstone so that the maximum roughness becomes Ra 0.1, do.

On the other hand, the operating relationship of the sleeve polishing apparatus used in the continuous polishing step will be described.

First, for the primary polishing in the continuous polishing step, the primary polishing means 400 is mounted on the ram 310 while the sleeve 32 is seated on the turntable 210 as shown in FIG. 5A. At this time, if the tip for the machining or finishing is mounted on the ram 310, it is detached and then the primary polishing means 400 is replaced and mounted. In this state, the ram 310 is moved so that the grinding wheel 410 of the primary grinding means 400 is brought into contact with the outer peripheral surface of the sleeve 32, and then the turntable 210 is rotated. The outer circumferential surface of the sleeve 32 is ground while the outer circumferential surface of the sleeve 32 is in contact with the grinding wheel 410.

If the outer peripheral surface of the sleeve 32 is ground to a desired level, the sleeve 32 is mounted on the turntable 210 without moving the sleeve 32 as shown in FIG. 5B, The means 400 is removed and then the secondary polishing means 500 is mounted. Then, the contact roller 515 of the secondary polishing means 500 is brought into close contact with the outer peripheral surface of the sleeve 32 by using the ram 310. So that the abrasive film 519 guided by the contact roller 515 is brought into close contact with the outer peripheral surface of the sleeve 32.

In this state, air is supplied to the cylinders 517 and 518 which press the contact roller 515 against the outer peripheral surface of the sleeve 32 while the turntable 210 is rotated so that the contact roller 515 closely contacts the outer peripheral surface of the sleeve 32 . Then, the outer circumferential surface of the sleeve 32 is polished to the mirror surface level while the outer circumferential surface of the sleeve 32 is in contact with the polishing film 519.

The abrasive film 519 pressed by the contact roller 515 and brought into contact with the sleeve 32 is wound around a take-up reel 513 and recovered.

Although the present invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the present invention is not limited thereto but is limited by the following claims. Accordingly, those skilled in the art will appreciate that various modifications and changes may be made thereto without departing from the spirit of the following claims.

32: Sleeve 100: Lower base
200: seating means 210: turntable
220: rotating shaft 300: upper base
310: Ram 320: Holder
400 primary polishing means 410 polishing wheel
420: first fastening jig 500: secondary grinding means
510: film polishing unit 511:
512: Release 513: Take-up reel
514: guide roller 515: close roller
516: roller support member 517: cylinder body
518: Cylinder rod 519: Polishing film
520: second fastening jig 530: support unit
531: Tilting bar 532: Tilting shaft
533: tilting fixture

Claims (9)

An apparatus for polishing an outer circumferential surface of a sleeve constituting an oil film bearing provided in a choke of a roll facility,
A lower base for providing a space for polishing;
A mounting means provided on the lower base for receiving and rotating the sleeve;
An upper base spaced apart from an upper portion of the lower base and having a RAM that is moved in a vertical direction;
A primary polishing means provided in the upper base so as to be replaceable and provided with a polishing grindstone that contacts the outer peripheral surface of the sleeve to polish the outer peripheral surface of the sleeve;
A second polishing step of polishing the outer circumferential surface of the sleeve in a mirror-finished state by using a polishing film which is provided to be interchangeable with the ram of the upper base and is provided alternately with the primary polishing means and continuously supplied to contact the outer circumferential surface of the sleeve, A polishing apparatus for a sleeve including a polishing means.
The method according to claim 1,
Wherein the mounting means comprises a turntable on which an end of either one of longitudinally opposite ends of the sleeve is seated and fixed and a rotating shaft mounted on an upper surface of the lower base and connected to a lower center of the turntable to rotate the turntable,
The ram of the upper base is installed near the upper portion of the turntable,
Wherein at least one of the rotating shaft and the ram is movably installed in a horizontal direction.
The method according to claim 1,
The primary polishing means and the secondary polishing means each include a first fastening jig and a second fastening jig for coupling with the ram provided on the upper base,
Wherein the ram of the upper base is provided with a first fastening jig provided to each of the primary and secondary polishing means, and a holder to which the second fastening jig is attached and detached.
The polishing apparatus according to claim 3, wherein the secondary polishing means
A film polishing unit for providing a polishing film such that the polishing film continuously contacts the outer peripheral surface of the sleeve;
And a support unit installed to vary the installation angle of the film polishing unit,
And the second fastening jig is connected to the support unit.
5. The film polishing apparatus according to claim 4,
A body coupled to the support unit;
A pickup roll installed to be driven by the main body to pull out the abrasive film;
A plurality of guide rollers installed on the main body and guiding a moving path of the polishing film wound on the winding roll;
A tightening roller installed on the main body and closely contacting the outer circumferential surface of the sleeve for contacting the abrasive film while being guided by the guide roller;
A take-up reel for taking up the abrasive film which is abraded on the outer circumferential surface of the sleeve while being in contact with the outer circumferential surface of the sleeve by the contact roller;
And a cylinder for bringing the contact roller into close contact with the outer peripheral surface of the sleeve.
6. The apparatus of claim 5,
A tilting bar on which the second fastening jig is installed;
A tilting shaft connecting the main body to the tilting bar, the tilting shaft turning the main body so as to vary the installation angle of the tilting bar;
And a tilting retainer extending from an end of the tilting bar to fix an end of the main body to which an installation angle is variable.
1. A method for manufacturing a sleeve constituting an oil film bearing provided in a choke of a roll facility,
A body forming step of manufacturing a cylindrical sleeve-forming body having a hollow interior by forging;
A first machining step of roughing the body;
A heat treatment step of heat treating the body;
A second machining step of machining at least one of an intermediate cutting and a finishing so as to form the shape of the final sleeve by machining the body;
A first polishing means provided with a polishing grindstone is mounted on the machining apparatus so as not to move the body from the machining apparatus in which the second mechanical machining step has been performed so that the outer circumferential surface of the body is firstly polished, And a continuous polishing step for continuously polishing the outer circumferential surface of the primary polished body by replacing the means with a secondary polishing means provided with a polishing film.
The method of claim 7,
Wherein the primary polishing in the continuous polishing step is performed such that the maximum roughness of the outer circumferential surface of the sleeve is Ra 0.4 and the secondary polishing is performed such that the maximum roughness of the outer circumferential surface of the sleeve is Ra 0.1.
The method according to claim 7 or 8,
Wherein the continuous polishing step uses the sleeve polishing apparatus of any one of claims 1 to 6.
KR1020150104102A 2015-07-23 2015-07-23 Apparatus for polishing sleeve KR101760568B1 (en)

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KR1020150104102A KR101760568B1 (en) 2015-07-23 2015-07-23 Apparatus for polishing sleeve

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Application Number Priority Date Filing Date Title
KR1020150104102A KR101760568B1 (en) 2015-07-23 2015-07-23 Apparatus for polishing sleeve

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN113561038A (en) * 2021-09-27 2021-10-29 江苏万力机械股份有限公司 Be used for mechanical manufacturing panel beating polishing thickness detection device

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KR890000207A (en) 1987-06-22 1989-03-13 박홍기 Ultra Precision Grinding Machine

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KR100795470B1 (en) * 2007-03-15 2008-01-16 최욱현 Turning processing apparatus and control method having high-speed grinding function
JP2009016759A (en) * 2007-07-09 2009-01-22 Nihon Micro Coating Co Ltd Device for polishing semiconductor wafer end face and polishing head used for the same
KR100936395B1 (en) * 2009-04-07 2010-01-12 주식회사 한스코 Manufacturing method shell

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KR890000207A (en) 1987-06-22 1989-03-13 박홍기 Ultra Precision Grinding Machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113561038A (en) * 2021-09-27 2021-10-29 江苏万力机械股份有限公司 Be used for mechanical manufacturing panel beating polishing thickness detection device
CN113561038B (en) * 2021-09-27 2021-11-30 江苏万力机械股份有限公司 Be used for mechanical manufacturing panel beating polishing thickness detection device

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