KR20050073270A - Grinding tool for panel grinding apparatus - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing tool for a panel polishing device that is fixed to a spindle and polishes a surface of a panel placed on a wear table. The present invention relates to a ring shape through which an abrasive flow tube fixed at a lower end of a spindle and an abrasive flows in a central region passes. A support member having a fixed portion of the support member and a boss portion extending through the abrasive flow tube and extending downwardly along an inner circumference of the fixed portion, the support member rotating integrally with the spindle; A plurality of upper leaf springs coupled to the fixed portion of the support member; A lower leaf spring that supports the upper leaf spring and is coupled to the boss portion of the support member, the lower leaf spring elastically biasing the panel together with the upper leaf spring; It is coupled to the lower surface of the lower leaf spring, characterized in that it comprises a polishing member protruding a plurality of polishing buttons for contact polishing the surface of the panel. As a result, the surface of the panel can be uniformly polished.

Description

Polishing tool for panel polishing device {GRINDING TOOL FOR PANEL GRINDING APPARATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing tool for a panel polishing device, and more particularly, to a polishing tool for a panel polishing device, which is fixed to a spindle and polishes a surface of a panel deposited 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.

6 is a front view of a general panel polishing apparatus. As shown in the drawing, the panel 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 horizontally movable and rotatable 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.

FIG. 7 is an enlarged cross-sectional view of a region of a conventional polishing tool 114 for a panel polishing device, and FIG. 8 is a view showing a state in which compressed air is injected into the airbag of FIG. As shown in these drawings, the spindle 7 has an abrasive supply path 11 formed therein along an 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 the lower end of the spindle 7 and a polishing member 121 coupled to the 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 coupled to the lower end of the spindle 7 to supply 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 the panel polishing device, when compressed air is injected into the airbag, as shown in Figure 8, the lower center area of the airbag protrudes to bend downward, the position of the polishing button when performing the polishing operation Very large deviation of the polishing button occurs. Therefore, not only uneven wear of the polishing button is generated, but there is a problem that the surface of the panel cannot be uniformly polished such that the edges and edge areas of the panel are excessively polished or excessively polished.

Accordingly, it is an object of the present invention to provide a polishing tool for a panel polishing device capable of uniformly polishing the surface of a panel.

The above object is, according to the present invention, in a polishing tool for a panel polishing device for polishing a surface of a panel mounted on a wear table fixed to a spindle, the abrasive flow tube is fixed to the lower end of the spindle and the abrasive flows in the central region A support member having a penetrating ring-shaped fixing portion and a boss portion through which the abrasive flow tube penetrates and extending downwardly along an inner circumference of the fixing portion, the support member rotating integrally with the spindle; A plurality of upper leaf springs coupled to the fixing portion of the support member; A lower leaf spring that supports the upper leaf spring and is coupled to a boss of the support member and elastically biases the panel together with the upper leaf spring; It is achieved by a polishing tool for a panel polishing apparatus, coupled to the lower surface of the lower leaf spring, comprising a polishing member protruding a plurality of polishing buttons for contact polishing the surface of the panel.

Here, the plurality of upper leaf springs are preferably arranged radially at equal intervals along the circumference of the fixing portion.

In addition, the lower leaf spring may include a plurality of wings respectively corresponding to the plurality of upper leaf springs.

In addition, the lower leaf spring is installed to be inclined upward toward the shaft center of the spindle, so that the lower leaf spring corresponds to the complex curvature of the panel surface and is elastically biased, so that each polishing button is easy to move up and down as well as almost constant. It can be pressed into contact with the panel.

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

The polishing tool for a panel polishing apparatus according to the present invention is mounted to the panel polishing apparatus described with reference to FIG. 6, and a description of the panel 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 front view of a mounting state of a polishing tool for a panel polishing apparatus according to the present invention, Figure 2 is an enlarged cross-sectional view of Figure 1, Figure 3 is a plan view of Figure 1, Figure 4 is a bottom view of Figure 1. As shown in these figures, 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. The polishing tool 20 for a panel polishing apparatus which concerns on this invention is mounted.

The polishing tool 20 includes a support member 21 coupled to the tool mounting portion 13 to be detachably attached to the tool mounting portion 13 with an outer diameter extending along the radial direction of the tool mounting portion 13, and a plurality of coupling members 21 to the support member 21. A lower leaf spring having an upper leaf spring 41, a lower leaf spring 51 for supporting the plurality of upper leaf springs 41, and a plurality of polishing buttons 67 for contact polishing the surface of the panel 8; 51 has an abrasive member 65 coupled to it.

The support member 21 is detachably coupled to the lower end of the spindle 7 to rotate integrally with the spindle 7. The support member 21 has a ring-shaped fixing portion 23 and a boss portion 35 extending downwardly bent along the inner circumference of the fixing portion 23.

The fixing part 23 communicates with the abrasive supply passage 11 of the spindle 7 in the center area and passes through the abrasive supply pipe 17 for supplying the abrasive toward the surface of the panel 8, and the abrasive supply pipe 17 is It is coupled to the fixing part 23 by the lock nut 19. In addition, the fixing portion 23 is formed in the upper region recessed portion 25 is recessed downward to accommodate the lower end of the tool mounting portion 13 of the spindle. In the recess 25, a plurality of first fastening holes 27 are formed so as to communicate with the bolt holes 15 formed in the tool mounting part 13, and the bolt holes 15 of the tool mounting part 13 are secured. The first fastening hole 27 of the government 23 is coupled through the fastening bolt 29. In addition, a plurality of second fastening holes 31 are formed in the outer circumferential region of the fixing part 23 to communicate with the third fastening holes 43 formed in the upper leaf spring 41 to be described later.

The abrasive supply pipe 17 is coupled to the central region of the boss portion 35, and the boss coupling portion 53 of the lower leaf spring 51, which will be described later, is supported by the lower end of the boss portion 35.

The upper leaf spring 41 has a band shape and is disposed radially at equal intervals along the outer circumference of the fixing portion 23 as shown in FIG. 3. The upper leaf spring 41 corresponds to the complex curvature of the surface of the panel 8 during polishing and is partially elastically deformed toward the lower leaf spring 51 so as to be elastically deformed flexibly so that no excessive force is applied to the panel 8. It is formed bending. In addition, a third fastening hole 43 communicating with the second fastening hole 31 of the fixing part 23 is formed in the inner circumferential region of the upper leaf spring 41, and the second fastening of the fixing part 23 is formed. The upper spring fixing bolt 45 is coupled to the third fastening hole 43 of the ball 31 and the upper leaf spring 41 through. A bolt through hole 47 is formed in the outer circumferential region of the upper leaf spring 41 to communicate with the bolt communicating hole 57 of the lower leaf spring 51 to be described later.

The lower leaf spring 51 is coupled to the boss portion 35 of the support member 21 and is installed to be inclined upwardly toward the shaft center of the spindle 7. As shown in FIG. 5, the lower leaf spring 51 is coupled to the boss portion 35 of the support member 21 and the boss coupling portion 53 to which the abrasive supply pipe 17 is coupled to the central region. Each of the upper leaf springs 41 has a plurality of wings 55 extending radially from the outer circumference of the boss coupling portion 53.

A bolt communication hole 57 is formed in the outer circumferential region of the wing portion 55 of the lower leaf spring 51 to communicate with the bolt through hole 47 of the upper leaf spring 41. The lower spring fixing bolt 59 is coupled through the bolt through hole 47 of the upper leaf spring 41 and the bolt communicating hole 57 of the lower leaf spring 51. Here, the bolt communication hole 57 corresponds to the complex curvature of the surface of the panel 8 during the polishing operation of the surface of the panel 8 so that the upper leaf spring 41 and the lower leaf spring 51 are elastically biasable. That is, when the surface of the panel 8 is polished, the lower plate spring 51 together with the upper plate spring 41 has a long hole shape formed in the longitudinal direction of the lower plate spring 51 so as to be elastically deformable in the radial direction.

The abrasive member 65 is coupled to the abrasive supply pipe 17 in the center region, the outer circumference is coupled to the lower surface of the lower plate spring 51 by a lower spring fixing bolt (59). A plurality of polishing buttons 67 protrude from the plate surface of the polishing member 65. Here, the polishing member 65 is preferably made of an elastic material so as to correspond to the elastic deformation of the lower leaf spring (51). In addition, the polishing button 67 is manufactured differently according to the use, the polishing button 67 used for rough polishing, etc. is usually formed of a metal member, the polishing button 67 used in the case of polishing processing is a polishing member ( At the time of molding 65, the molded part is integrally formed with a rubber member such as the abrasive member 65.

Meanwhile, reference numeral 33 denotes an upper retainer for retaining the coupling of the upper leaf spring 41 and the support member 21, and reference numeral 61 denotes the engagement of the upper leaf spring 41 and the lower leaf spring 51. Indicates the lower retainer to hold.

By this configuration, when the panel 8 is placed on the wear table 6, the pivot arm 5 rotates downward so that the polishing button 67 is close to the surface of the panel 8, and the spindle drive motor 9 ) Starts rotation to rotate the spindle 7.

At this time, the abrasive is supplied to the panel 8 through the abrasive supply passage 11 through the abrasive supply pipe 17, and the wear table 6 moves the panel 8 in the opposite direction to the rotational direction of the spindle 7. Rotated. Then, the spindle 7 is lowered so that the polishing button 67 contacts the pressure of the panel 8, and thereby the polishing action of the panel 8 is started.

During the polishing operation of the panel 8, the polishing button 67 is in contact with the surface of the panel 8 to flow in the vertical direction as the curvature of the surface of the panel 8 changes. At this time, since it corresponds to the complex curvature of the surface of the panel 8 and elastically together with the upper leaf spring 41 and the lower leaf spring 51, each polishing button 67 of the polishing member 65 has a vertical flow Not only is it easy to come into contact with the panel 8 with a substantially constant pressing force, whereby even polishing is achieved.

As described above, by elastically supporting the polishing member on which the plurality of polishing buttons projecting and polishing the surface of the panel is protruded with a leaf spring, the sheet spring is elastically deformed and the leaf spring is elastically deformed so that the up and down flow of each polishing button is easy. In addition, it is possible to make uniform polishing by contacting the panel with a substantially constant pressing force.

As described above, according to the present invention, there is provided a polishing tool for a panel polishing apparatus that can uniformly polish the surface of a panel.

1 is a front view of the mounting state of the polishing tool for a panel polishing apparatus according to the present invention,

2 is an enlarged cross-sectional view of FIG.

3 is a plan view of FIG.

4 is a bottom view of FIG. 1,

5 is a plan view of the lower leaf spring of FIG.

6 is a front view of a general panel polishing apparatus,

7 is an enlarged cross-sectional view of a conventional polishing tool for a panel polishing device;

FIG. 8 is a view illustrating a state in which compressed air is injected into the airbag of FIG. 7.

* Explanation of symbols for the main parts of the drawings

6: weartable 7: spindle

8 panel 17 abrasive feed pipe

20: polishing tool 21: support member

23: fixed part 35: boss

41: upper leaf spring 51: lower leaf spring

53: boss coupling portion 55: wing portion

65: polishing member 67: polishing button

Claims (4)

A polishing tool for a panel polishing device, which is fixed to a spindle and polishes the surface of a panel placed on a wear table, The spindle is fixed to the lower end of the spindle and has a ring-shaped fixing portion through which the abrasive flow pipe through which the abrasive flows, the boss flows through the abrasive flow pipe and bends downwardly along the inner circumference of the fixing part, and the spindle A support member which rotates integrally with the support member; A plurality of upper leaf springs coupled to the fixing portion of the support member; A lower leaf spring that supports the upper leaf spring and is coupled to a boss of the support member and elastically biases the panel together with the upper leaf spring; And a polishing member coupled to a lower surface of the lower leaf spring, the polishing member protruding a plurality of polishing buttons for contact polishing the surface of the panel. The method of claim 1, And the plurality of upper leaf springs are disposed radially at equal intervals along the circumference of the fixing part. The method of claim 2, And the lower leaf spring includes a plurality of wings corresponding to the plurality of upper leaf springs, respectively. The method of claim 3, And the lower plate spring is installed to be inclined upwardly toward the axis of the spindle.