JPH04201054A - Method and device for surface polishing of panel for cathode-ray tube - Google Patents

Abstract

PURPOSE:To uniformly polish a non-spherical panel having a plurality of radii of curvature by rotating a polishing tool and panel base in the same direction and same rotation number in an eccentric state, and also, rocking with their reciprocating in the lateral difection relatively. CONSTITUTION:A polishing tool rotating shaft 14 and panel base rotating shaft 1 are supported with the specified eccentric quantity (e) being given. Then, the both rotating shafts 1, 14 are rotated by a harmonic rotation driving mechanism 7 in the same direction and same rotation number, and also, one part 14 or the both of rotating shaft 1 and 14 are, rocked with their reciprocation by a rocking imparting mechanism 6 with their being made orthogonal with the axial line while imparting a polishing pressure with the action of a cylinder 5 for moving the polishing tool vertically, and the surface of the panel 8 for Braun tube is polished by a polishing tool 15.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for polishing the surface of a cathode ray tube panel.

[Prior Art] A cathode ray tube panel is formed by placing a molten glass lump in a mold and pressing it. However, defects such as small holes, mold stains, and wrinkles occur on the outer surface of the press-formed panel, so it is difficult to remove these defects by polishing to create a high-quality panel with a smooth outer surface. is necessary.

As this type of polishing device for cathode ray tube panels, for example, Japanese Patent Publication No. 40-2875.3, Japanese Patent Application Laid-Open No. 53-8909
No. 2, JP-A No. 2-1726'67, etc. are well known.

[Problems to be Solved by the Invention] First, the polishing apparatus disclosed in Japanese Patent Publication No. 40-28753 is suitable for polishing a panel having a spherical shape with a single curvature. However, it is impossible to uniformly polish an aspherical groove having a multiplication ratio, and the polishing efficiency is also reduced.

Polishing device of JP-A-53-89092 and JP-A-2-1
The polishing apparatus of No. 72667 has problems in that it is not suitable for polishing panels with an aspherical shape having a multiplication ratio, or that the apparatus is complicated and becomes an impediment to speeding up the process.

- An object of the present invention is to provide a method and apparatus for polishing the surface of a cathode ray tube panel, which can simplify the apparatus and enable high-speed polishing.

[Means for Solving the Problems] In order to achieve the above object, the method of the present invention supports a polishing tool rotating shaft and a panel table rotating shaft with a predetermined amount of eccentricity, and also supports both rotating shafts in the same direction. Rotate at the same speed,
In addition, one or both of the rotating shafts is reciprocated perpendicular to the axis while applying polishing pressure.

Further, the device of the present invention has a panel stand on the top surface for positioning and mounting the panel, and the panel stand rotation axis is rotatably supported by the base, and the panel stand rotation axis is rotatable on the base parallel to the panel stand rotation axis. a polishing head arm supported so as to be able to swing up and down via a fulcrum shaft placed perpendicular to the swing rotation shaft at the upper end of the swing rotation shaft; A polishing tool rotating shaft is arranged facing each other with a predetermined eccentricity, has a polishing tool at its lower end, and is rotatably supported at the tip of a polishing head arm, and a polishing tool vertically moving the polishing head arm up and down about the fulcrum shaft. a rotational cylinder, a swinging mechanism that swings the polishing head arm about the swinging rotation axis, and a synchronized rotational drive mechanism that drives the panel table rotational axis and the polishing tool rotational axis in the same direction and at the same rotation speed. It consists of.

[Function] The polishing tool and the panel stand rotate eccentrically in the same direction at the same number of rotations, and by relatively swinging back and forth in the lateral direction, the aspherical panel with multiple coverage can be evenly polished. It becomes possible to polish to

In particular, since the polishing tool can be rotated eccentrically with respect to the panel and reciprocated in the lateral direction, the driving device can be simplified and high speed operation can be achieved.

[Embodiment] Figure 1 is a schematic perspective view of the main parts of an apparatus for carrying out the method of the present invention, Figure 2 is a partially vertical side view thereof, and Figure 3 is a sectional view taken along the line ■-■ in Figure 2. There, (1) is the panel stand rotation axis, (
2) is the swing rotation axis, (3) is the polishing head arm, (4)
is the abrasive tool rotation axis, (5) is the abrasive tool upper and lower cylinder, (6
) indicates the swing imparting mechanism, and (7) indicates the synchronized rotation drive mechanism.

The panel stand rotation shaft (1) has a panel stand (9) on the top surface for positioning and mounting the panel (8), and a bearing (10) on the base (10).
11) Rotatably supported via (11).

The swing rotation shaft (2) is rotatably supported by the base (10) via bearings (12) in parallel with the panel table rotation shaft (1).

The polishing head arm (3) is supported at the upper end of the swinging rotation shaft (2) via a fulcrum shaft (13) disposed orthogonally to the swinging rotation shaft (2) so as to be swingable up and down.

The polishing tool rotating shaft (4) is arranged to face the panel table rotating shaft (1) with a predetermined eccentricity (e), and has a universal joint (
Attach the polishing tool (15) through the polishing tool (14) and insert the bearing (16) into the support (3a) at the tip of the polishing head arm (3).
It is rotatably supported via (16). The eccentricity (e) of the support (3a) and polishing head arm (3) can be changed by changing the number of shims (3b) interposed therebetween.

The polishing tool vertical cylinder (5) moves the polishing head arm (3) up and down about the fulcrum shaft (13), and connects the rear end of the polishing head arm (3) and the swinging arm (6a).
) or a part of the swing rotation shaft (2).

The rocking mechanism (6) is configured to reciprocate a rocking arm (6a) fixed to the negative part of the rocking rotation shaft (2) by a drive motor (6b) via a crank (6C). The drive motor (6a) is fixed to the base (10) and is connected to the crank (
6C) and the swinging arm (6a) are constructed by engaging the row (6d) attached to the crank (6C) with the elongated hole (6e) formed in the swinging arm (6a). A polishing head arm (3) is reciprocated about a dynamic rotation axis (2).

The synchronized rotation drive mechanism (7) is for driving the panel table rotation shaft (1) and the polishing tool rotation shaft (4) in the same direction and at the same rotation speed. The drive motor (7a) drives the output shaft (7b) of the gearbox (7b).
7C) via a toothed belt (7d). In this case, the lower end of the slotted rotary shaft (1) and the output shaft (
A toothed pulley (7e) (7C) has the same diameter as the lower end of (7C).
7f) is fixed, and the rotational force is transmitted by a toothed belt (7d).

The polishing tool rotating shaft (4) is rotationally driven from the rotating shaft (7g) of the polishing/rad arm (3) via a toothed belt (7h). In this case, a toothed pulley (7i) with the same diameter is attached to the upper end of the polishing tool rotating shaft (4) and the upper end of the rotating shaft (7g).
(7j) is fixed, and rotational force is transmitted by a toothed heald (7h). The lower end of the rotating shaft (7g) is connected to the upper end of a spline shaft (71) via a universal joint (7k), and the lower end of this spline shaft (71) is inserted into the spline cylinder shaft (7m), and this spline Cylinder shaft (7m)
is connected at its lower end to the upper end of the output shaft (7C) of the gear box (7b) via a universal joint (7n).

The spline shaft (71) and the spline cylinder shaft (7m) allow the polishing head arm (3) to swing up and down about the fulcrum shaft (13) while allowing the base (10
) is fixed to the output shaft (7C) of the Gabo Sox (7b)
) is applied to the rotating shaft (7) of the polishing head arm (3).
g).

Furthermore, the gear fixed to the base (10) is allowed to swing laterally around the swing rotation axis (2) by the universal joints (7k) (7n). The rotational force from the output shaft (7C) of the box (7b) is transmitted to the rotation shaft (7g) of the polishing head arm (3).

The rotating shaft (7g) is mounted on the polishing head arm (3) with a bearing (7g).
o) Rotatably supported via (7o).

Inside the gearbox (7g) are a manual bevel gear and an output bevel gear (
In Fig. 1, this human-powered bevel gear is driven by the output shaft of a drive motor (7a), but in Fig. 2, it is driven by a transmission mechanism (7p). It is intended to be driven.

The device of the present invention has the above configuration, and its operation will be explained next.

First, the cylinder for raising and lowering the polishing tool is contracted to raise the tip of the polishing head arm (3) about the fulcrum shaft (13), and in this state, the panel (8) is placed on the panel stand (9).
) is positioned and placed. The supply of panels (8) is carried out automatically by a robot controller or the like from a supply container. Next, the polishing tool upper and lower cylinders (5) are extended and pressed against the polishing tool (15) panel (8). An air cylinder is used for the polishing tool upper and lower cylinders (5), which also have the function of applying polishing pressure. In this state, the drive motor (6b) of the swing imparting mechanism (6) and the drive motor (7a) of the synchronous rotation drive mechanism (7) are driven at appropriate predetermined rotational speeds. As a result, the polishing tool (15) and the panel stand (9) rotate eccentrically in the same direction at the same rotation speed, and relatively swing back and forth in the lateral direction. Therefore,
It becomes possible to uniformly polish the surface of the aspherical panel (8) having a multiplication ratio. The polished panel (8) is automatically carried out by a carrying robot or the like.

In the above embodiment, the polishing tool (15) is swung back and forth, but the panel stand (9) may be swung back and forth.

Also, the amount of eccentricity (e) between the polishing tool (15) and the panel stand (9) is
) is appropriately selected depending on the relative dimensional relationship between the polishing tool (15) and the panel (8), and the same applies to the swing range. It should be noted that the present invention is particularly suitable for polishing a panel (8) having an aspherical shape with a double stroke ratio, or when polishing a panel (8) consisting of a spherical surface of a single curvature with the same configuration as described above. It can also be applied to

U Effect of the invention] According to the method of the invention, it is possible to uniformly polish the surface of the panel, whether it is spherical or aspherical.

In particular, the polishing tool and panel stand are eccentrically rotated in the same direction at the same number of rotations, and are simply reciprocated in the horizontal direction, so the driving device is simple and high speed is possible. Become.

Further, according to the device of the present invention, it is only necessary to drive the drive motor of the swing imparting mechanism and the drive motor of the synchronized rotation drive mechanism, which simplifies the entire device. can be polished uniformly.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a main part of an apparatus for carrying out the method of the present invention, FIG. 2 is a partially longitudinal side view thereof, and FIG. 3 is a sectional view taken along line mm in FIG. 2. (1)... Panel stand rotation axis, (2)... Swing rotation axis, (
3)...polishing head arm, (4)...polishing tool rotation axis, (5)...polishing tool up and down cylinder, (6)...oscillation imparting mechanism, (7)...synchronization Rotation drive mechanism, (8)... Panel, (9)... Panel stand, (10)... Base, (13)... Fulcrum shaft, (15)... Polishing tool. Patent applicant Nippon Electric Glass Co., Ltd.
Figure 2, Figure 3

Claims (2)

[Claims] (1) Support the polishing tool rotating shaft and the panel stand rotating shaft with a predetermined eccentricity, rotate both rotating shafts in the same direction at the same number of rotations, and polish one or both of the rotating shafts. A method for polishing the surface of a cathode ray tube panel, characterized in that the panel is reciprocated orthogonally to the axis under pressure. (2) It has a panel stand on the top surface for positioning and mounting the panel, a panel stand rotation axis rotatably supported by the base, and a oscillator rotatably supported by the base parallel to the panel stand rotation axis. A polishing head arm supported to be able to swing up and down via a fulcrum shaft arranged orthogonal to the swing rotation axis at the upper end of the swing rotation axis, and a predetermined eccentricity between the panel table rotation axis and are placed opposite each other,
a polishing tool rotating shaft that has a polishing tool at its lower end and is rotatably supported at the tip of the polishing head arm; a polishing tool vertical cylinder that moves the polishing head arm up and down about the fulcrum shaft; and the swinging rotation shaft. for a cathode ray tube, comprising: a swing imparting mechanism that swings a polishing head arm around the center; and a synchronized rotational drive mechanism that drives the panel table rotating shaft and the polishing tool rotating shaft in the same direction and at the same rotation speed. Panel surface polishing equipment.