KR20000032298A - Polishing tool for panel surface polisher - Google Patents

Abstract

PURPOSE: A polishing tool for a panel surface polisher is provided to equally polish by making a panel surface and a polished face equally contact each other. CONSTITUTION: A bellows member(29) is combined with a supporting member(15) and the combined body is fixed on a tool installation unit of a spindle(7). When air is inserted in an accepting space through a nipple(33), the bellows unit(29) is expanded in a length direction along with an axle direction of the spindle. When a rotary arm is rotated downward so a polishing tool(14) as to approach the surface of a panel, a spindle driving motor rotates the spindle. Herein, a polishing material is supplied the panel through a supply route(11) and a pipe(39) formed inside the spindle. Further, a wear-table rotates the panel in the opposite direction of the rotation direction of the spindle(7). Then, the spindle descends for a polishing button(22) to be contacted and pressurized on the surface of the panel, and accordingly, the polishing of the panel is started.

Description

Polishing Tools for Panel Surface Polishing Devices

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing tool for a panel surface polishing apparatus, and more particularly, to a polishing tool for a panel surface polishing apparatus for polishing a cathode ray tube panel fixed to a rotating spindle and mounted on a wear table.

Generally, a cathode ray tube has a panel on which an image is projected, a funnel-shaped funnel coupled to the rear of the panel, and a neck coupled to the funnel with an electron gun. The conventional cathode ray tube has a curved display surface, and the curved display surface, that is, the outer surface, is mirror polished by a polishing apparatus developed in various forms. In order to increase the applicability of the fluorescent material, the inner surface opposite to the display surface is provided with a stifle to have an appropriate roughness during the press molding of the panel.

In recent years, the display surface of the panel has been flattened for the purpose of increasing the visual effect, and the use of so-called aspherical panels having a complex curvature has been increased. For polishing the surface of the aspherical panel, a polishing tool using an air cushion is used.

4 is a front view of a general panel surface polishing apparatus. As shown in the drawing, the panel surface polishing apparatus includes a base member 1, a column 3 standing up on one side of the base member 1, and a rotation arm disposed to be rotatable in an upper region of the column 3. (5) and a spindle (7) disposed at one end of the pivoting arm (5) so as to be capable of horizontally lifting and rotating in the longitudinal direction of the pivoting arm (5). At the other end of the rotating arm 5, a spindle drive motor 9 for rotating the spindle 7 is installed, and the spindle drive motor 9 and the spindle 7 are connected to each other by a belt (not shown). have.

A predetermined polishing space 10 is formed on the upper side of the base member 1 corresponding to the spindle 7, and the wear table 10 supports the cathode ray tube panel 8 to be polished in the polishing space 10. 6) is installed to be rotatable.

A tool mounting portion 13 is formed at the lower end of the spindle 7, and the tool mounting portion 13 is coupled to the polishing tool 114 to be detachable.

5 is an enlarged cross-sectional view of a conventional polishing tool 114 region for surface polishing apparatus, and FIG. 6 is a view showing a state in which compressed air is injected into the airbag of FIG. As shown, the spindle 7 has an abrasive supply path 11 formed therein along the axis, and a tool mounting portion 13 is formed at the bottom thereof so that the polishing tool 114 can be mounted. The polishing tool 114 may include a fixing member 115 coupled to a lower end of the spindle 7 and a polishing member 121 coupled to a lower end of the fixing member 115 and having a plurality of polishing buttons 123 protruding from the plate surface. And an air bag 125 that receives compressed air and is interposed between the fixing member 115 and the polishing member 121 to elastically support the polishing member 121 during polishing.

The holding member 115 has a disk shape having an outer diameter that is larger than the outer diameter of the spindle 7. The fixing member 115 is downwardly opened to accommodate the airbag 125 therein, and a fixing flange 117 is formed at a lower end thereof in a circumferential direction. A plurality of bolt holes 119 are formed in the fixed flange 117 through the plate surface so that the polishing member 121 may be coupled thereto.

The airbag 125 has a circular ring shape through which a central area penetrates, and a nipple 127 is coupled to a contact area of the fixing member 115 to allow air from the outside to flow therein.

The polishing member 121 has a disc shape, and a plurality of bolt through holes 131 are formed in the contact area with the fixing flange 117 to communicate with the bolt holes 119. A plurality of polishing buttons 123 protruding from the plate surface are formed in the central region so as to contact the display surface of the panel 8, and openings are formed in the central region. The opening is coupled with an abrasive supply pipe 129 which is coupled downwardly to the lower end of the spindle 7 and supplies the abrasive toward the panel 8.

By such a configuration, the airbag 125 is accommodated and coupled between the fixing member 115 and the polishing member 121, and the bolt is fastened to each bolt hole 119 of the fixing member 115 and the polishing member 121. To be fixed to each other. Next, the fixing member 115 is coupled to the tool mounting portion 13 formed at the lower end of the spindle 7. Compressed air is injected into the airbag 125 through the nipple 127 protruding outward from the fixing member 115.

When the cathode ray tube panel 8 to be processed on the wear table 6 is loaded, the pivot arm 5 starts lowering such that the polishing button 123 is close to the surface of the panel 8. At this time, when the spindle drive motor 9 starts to rotate in one direction, slurry-like abrasives are provided to the display surface of the panel 8 along the axial center of the spindle 7 through the abrasive supply pipe 129. Then, the wear table 6 is rotated together with the panel 8 in a direction opposite to the rotational direction of the spindle 7, and the spindle 7 has a polishing button 123 of the polishing tool 114 on the panel surface. The contact pressure is lowered to a pressure of to perform the polishing operation of the panel 8.

By the way, in the conventional polishing tool for surface polishing apparatus, as shown in FIG. 6, when compressed air is injected into the airbag, the center lower region of the airbag protrudes downwardly, thus performing a polishing operation. The variation of the polishing button for each position of the polishing button is greatly generated. Therefore, not only uneven wear of the polishing button is generated, but there is a problem in that a uniform polishing surface is not obtained, such as excessively polished or excessively polished edges and edge regions of the panel.

It is therefore an object of the present invention to provide a polishing tool for a panel surface polishing apparatus capable of performing uniform polishing by bringing the panel surface and the polishing surface into relatively uniform contact.

1 is a cross-sectional view of the mounting state of the polishing tool for panel surface polishing apparatus according to the present invention,

Figure 2 is a bottom view of the polishing tool of Figure 1,

3 is a cross-sectional view taken along line III-III of FIG. 2;

4 is a front view of a general panel surface polishing apparatus,

5 is an enlarged cross-sectional view of a polishing tool region for a conventional panel surface polishing apparatus;

FIG. 6 is a view illustrating a state in which compressed air is injected into the airbag of FIG. 5.

* Explanation of symbols for the main parts of the drawings

7 spindle 13 tool mounting part

15: support member 21: bellows member

23: fixing plate portion 29: bellows portion

31: lower flat surface 33: nipple

35 inner wall 37 outer wall

According to the present invention, in the polishing tool for a surface polishing apparatus for polishing a cathode ray tube panel fixed to a rotating spindle and mounted on a wear table, the disk-shaped is integrally rotatably fixed to a lower end of the rotating spindle. A support member; A bellows member having an almost flat lower surface and defining an air receiving space therein for receiving compressed air therein and being extensible along the axial direction of the rotating spindles; Protruding from the lower surface of the bellows member is achieved by a polishing tool for a panel surface polishing apparatus comprising a plurality of polishing buttons for contact polishing the surface of the panel.

Here, it is preferable that the abrasive supply path through which the abrasive from the spindle passes is formed in the central region of the support member and the bellows member.

The bellows member includes a fixed plate portion fixed to the support member, a lower flat surface spaced apart from the fixed plate portion by a predetermined distance, and the fixed plate portion and the lower flat surface between the fixed plate portion and the lower flat surface. It is effective to form a bellows portion that is integrally formed with each other and extendable along the axial direction of the rotary spindles.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

The polishing tool for the panel surface polishing apparatus according to the present invention is mounted on the panel surface polishing apparatus for the cathode ray tube described with reference to FIG. 4, and the description of the panel surface polishing apparatus will be omitted. The same reference numerals are given to the same and equivalent components as in the prior art.

1 is a cross-sectional view of a mounting state of a polishing tool for a panel surface polishing apparatus according to the present invention. As shown, a tool mounting portion 13 extending in the radial direction is formed at the lower end of the hollow spindle 7 in which the abrasive supply passage 11 is formed therein, and the tool mounting portion 13 according to the present invention. A polishing tool 14 for panel surface polishing apparatus is mounted. The grinding tool 14 is coupled to the lower end of the support member 15 and the support member 15 which is detachably coupled to the tool mount 13 with an outer diameter extending along the radial direction of the tool mount 13. It has a bellows member 21 and a plurality of polishing buttons 22 protruding from the lower end of the bellows member 21 to contact and polish the surface of the panel. A plurality of bosses 17 protrude along the circumferential direction on the plate surface of the spindle 7 side of the support member 15, and each boss 17 has a bolt accommodation hole to allow bolts to pass along the shaft center. 19) is formed.

2 is a bottom view of the bellows member of FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2. As shown in these figures, the bellows member 21 is formed to protrude on one side of the fixed plate portion 23 and the fixed plate portion 23 which is supported in contact with the lower end of the support member 15, the receiving space of compressed air And a bellows portion 29 which is formed and stretchable along the axial direction of the spindle 7, and a lower flat surface 31 which is formed to block the lower end of the bellows portion 29.

A bolt through hole 25 is formed in the circumferential region of the fixed plate portion 23 to correspond to the boss portion 17 of the support member 15. Through-holes are formed in the central region of the fixed plate portion 23, and the through-holes are provided with an abrasive supply pipe 39 which is coupled to communicate with the abrasive supply path 11 of the spindle 7 and supplies the abrasive toward the panel. It is. The nipple 33 is coupled upwardly to the upper surface of the fixing plate 23 so as to supply air into the accommodation space, and the upper end of the nipple 33 passes through the support member 15 to support the 15 of the support member 15. It protrudes from the upper surface. An air supply pipe 41 coupled to the exposed end of the nipple 33 is connected to an air supply path formed at the spindle 7.

The bellows portion 29 is stretchable along the axial direction of the spindle 7 and has an inner wall 35 and an inner wall 35 protruding from the plate surface of the fixed plate portion 23 to form a receiving space for compressed air therein. Have outer walls 37 concentrically spaced apart from each other along the radial direction.

The lower flat surface 31 is integrally formed at the lower end of the bellows portion 29 so as to form a receiving space for compressed air in cooperation with the fixed plate portion 23 and the bellows portion 29. A plurality of polishing buttons 22 are formed at 31 to press and press the surface of the panel to polish the panel surface. Here, the fixing plate portion 23, the bellows portion 29 and the lower flat surface 31 is formed integrally with rubber having elasticity, and the polishing button 22 used for rough grinding or the like has a metal member in the shape of a button. Molded to have, then heated to be inserted into the lower flat surface 31 to a predetermined depth. In addition, the polishing button 22 may be formed of a rubber member integrally with the lower flat surface 31 when used for a polishing process or the like. In addition, the inner wall 35 and the outer wall 37 have a thickness dimension smaller than that of the lower planar surface 31 to facilitate elastic deformation compared to the lower planar surface 31.

By this configuration, the bellows member 29 is bolted to the support member 15 and the combination thereof is bolted to the tool mounting portion 13 of the spindle 7. When air is injected into the accommodation space through the nipple 33, the bellows 29 expands in the extending direction along the axial direction of the spindle 7.

On the other hand, when the rotating arm 5 is rotated downward so that the polishing tool 14 approaches the surface of the panel 8, the spindle drive motor 9 starts to rotate and drives the spindle 7 to rotate. At this time, the abrasive is supplied toward the panel 8 through the abrasive feed passage 11 and the abrasive feed pipe 39 formed in the spindle 7, and the wear table 6 is opposite to the rotational direction of the spindle 7. To rotate the panel (8). Then, the spindle 7 is lowered so that the polishing button 22 is pressed against the surface of the panel 8, whereby the polishing action of the panel 8 is started.

When performing the polishing operation, the polishing button 22 moves relative to the curved surface of the panel 8 and flows up and down according to the change in the curvature of the panel 8. At this time, the bellows portion 29 formed to be extensible along the axial direction of the spindle 7 facilitates the up and down movement of the polishing button 22 in response to the curvature change of the panel 8, thereby polishing the polishing button on the panel surface. Ensure that (22) comes in contact with a nearly constant pressure.

As described above, according to the present invention, the panel surface is uniformly polished by forming an elastic bellows portion along the axial direction of the spindle between the polishing button and the supporting member so that the panel surface and the polishing button are brought into contact with an appropriate pressing force. A polishing tool for a panel surface polishing apparatus is provided.

Claims (3)

A polishing tool for a surface polishing apparatus for polishing a cathode ray tube panel fixed to a rotating spindle and mounted on a wear table, A support member fixedly rotatably fixed to the lower ends of the rotary spindles; A bellows member having an almost flat lower surface and defining an air receiving space therein for receiving compressed air therein and being extensible along the axial direction of the rotating spindles; And a plurality of polishing buttons protruding from the lower surface of the bellows member and polishing the surface of the panel in contact with each other. The method of claim 1, And an abrasive feed path through which abrasive from the spindle passes in a central region of the support member and the bellows member. The method according to claim 1 or 2, The bellows member is integral with the fixing plate portion and the lower flat surface between the fixing plate portion fixed to the support member, the lower flat surface spaced apart from the fixing plate portion, and the fixing plate portion and the lower flat surface. And a bellows portion which is formed to be stretchable along the axial direction of the rotary spins.