KR20040026823A - Polishing machine for cathode ray tube panel - Google Patents

Abstract

PURPOSE: A cathode ray tube panel polishing machine is provided to prevent a polishing inferiority of a panel and to improve a maximum polishing efficiency of panel. CONSTITUTION: A cathode ray tube polishing machine comprises a frame(10), a first motion base(14) mounted on the frame to move in a straight line in the Y axis direction of a front and a rear against an indexing machine(1), a front and a rear direction motion device for reciprocating the first motion base in the Y axis direction, a motion range control device for controlling the reciprocating range of the Y axis direction of the first motion base, a tilting body(40) mounted on a tilting possibly a hinge axis(42) as a center at the first motion base, a second motion base(46) mounted on the frame to move in a straight line in the X axis direction of a left and a right against the indexing machine, a left and a right direction motion device for reciprocating the second motion base in the X axis direction, an arm(60) mounted toward the indexing machine at the second motion base, a polishing tool(62) mounted rotatably on a rotation axis as a center of X axis direction at the arm to polish a panel supported at the indexing machine, and a polishing tool motor(64) mounted to rotate a polishing tool at the second motion base.

Description

Panel Polishing Machine for Cathode Ray Tubes {POLISHING MACHINE FOR CATHODE RAY TUBE PANEL}

The present invention relates to a panel polishing machine for cathode ray tubes for polishing a panel for cathode ray tubes.

The cathode ray tube consists of a panel through which an image is projected, a conical funnel bonded to the back of the panel, and a tubular neck fused to a vertex of the funnel. These panels, funnels and necks are all made of glass. In particular, panels and funnels are manufactured by press molding a molten glass mass called a gob to a desired size and shape.

On the other hand, the panel has a face for displaying an image and a skirt extending rearward from the edge of the face. Such a panel generally has a rough surface when the molding process is completed. Appropriate grinding should remove optical defects. The polishing of the panel includes a rough polishing process using a metallic abrasive such as iron, an intermediate polishing process using an abrasive of a similar degree to glass, and a finish polishing process using an abrasive mainly composed of cerium. In other words, the face of the panel is ground to the required thickness with a relatively hard particulate abrasive and polished with a soft abrasive.

As an example of the prior art, a panel polishing machine for cathode ray tubes is proposed which performs an intermediate polishing process of a panel. Looking at this, the conventional panel polishing machine is provided with a rotatable drum polishing tool for polishing the panel on the table, it is configured to move the drum polishing tool in the left and right directions of the rotation axis. The polishing apparatus of this configuration rotates the drum polishing tool in close contact with the panel, and simultaneously polishes the face of the panel while moving in the left and right directions. On the other hand, the table for supporting the panel rotates about a vertical axis to allow the panel supported on the top to rotate relative to the drum polishing tool, thereby serving to lay the polishing efficiency of the panel.

However, such a conventional panel polishing machine has a problem that the polishing efficiency is lowered by moving the drum polishing tool only in the left and right directions of the rotation axis, and a large amount of polishing defects such as over-polishing or non-polishing any specific portion occurs. .

Accordingly, the present invention has been made to solve the problems described above, the object of which is to move the drum polishing tool not only in the left and right direction of the rotation axis but also in the front and rear direction, to maximize the polishing efficiency of the panel as well as the panel The present invention provides a panel polishing machine for cathode ray tubes that can prevent poor polishing.

In addition, another object of the present invention to provide a panel polishing machine for cathode ray tube to adjust the forward and backward movement distance of the drum polishing tool according to the size of the panel to be polished.

1 is a side view showing the configuration of a panel polishing machine for a cathode ray tube according to the present invention;

2 is a cross-sectional view taken along the line II-II of FIG. 1;

3 is a cross-sectional view taken along the line III-III of FIG. 1.

♣ Explanation of symbols for the main parts of the drawing ♣

10: frame 12: table

14: 1st motion base 16: guide

20: drive motor 22: worm jack mechanism

30: fixed detection sensor 32: movable detection sensor

34: controller 36: detection dog

38: guide rail 38a: measuring ruler

40: tilting body 46: second motion base

50: drive motor 52: crank arm

54: Link 60: Arm

62: grinding wheel 64: grinding wheel motor

In order to achieve the above object, the present invention provides a panel polishing machine for supporting a panel and constituting a panel polishing system for cathode ray tubes together with a supported rotating indexing machine, comprising: a frame; A first motion base installed on the frame to linearly move in the Y-axis direction before and after the indexing machine; Forward and backward movement means for reciprocating the first motion base in the Y axis direction; Movement distance adjusting means for adjusting the reciprocating movement distance in the Y-axis direction of the first motion base; A tilting body mounted to the first motion base to be tiltable about a hinge axis; A second motion base installed on the tilting body to linearly move in the left and right X-axis directions with respect to the indexing machine; Left and right movement means for reciprocating the second motion base in the X-axis direction; An arm installed on the indexing machine in the second motion base; A polishing tool rotatably installed on the arm about an axis of rotation in the X-axis direction to polish the panel supported by the indexing machine; And a polishing tool motor installed in the second motion base to rotate the polishing tool.

Hereinafter, a preferred embodiment of a panel polishing machine for a cathode ray tube according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a side view showing the configuration of a panel polishing machine for a cathode ray tube according to the present invention, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line III-III of FIG. First, referring to FIG. 1, it can be seen that the polishing machine of the present invention is installed together with the indexing machine 1 to constitute a panel polishing system. The indexing machine 1 has a support table 3 on which the panel P is mounted, which is configured to be rotatable about a vertical axis.

On the other hand, the polishing machine of the present invention has a frame 10. The frame 10 is provided with a table 12, on which the first motion base 14 is mounted. The first motion base 14 is installed so as to be able to move forward and backward with respect to the indexing machine 1 in the front and rearwards. For this purpose, the table 12 has the first motion base 14 before and after the " Y " A guide 16 for guiding in the "direction is provided. The guide 16 is installed in pairs on both sides as shown in FIG. 2, and is configured as, for example, a linear motion guide so as to smoothly move the first motion base 14.

And the polishing machine of the present invention is provided with a forward and backward movement means for linearly moving the first motion base 14 in the "Y" direction before and after. As shown in FIG. 2, the forward and backward movement means includes a drive motor 20 capable of forward and reverse rotation, and a worm jack mechanism for linearly moving the first motion base 14 back and forth according to the power of the drive motor 20. (Worm Jack Assembly: 22). The worm jack mechanism 22 has an actuating rod 24 connected to the rear end of the first motion base 14. The worm jack mechanism 22 forwards or backwards the first motion base 14 according to the driving direction of the driving motor 20. It is configured to linearly move. Since the worm jack mechanism 22 is well known, a detailed description thereof will be omitted. Here, the bellows 24a is wrapped around the outer surface of the actuating rod 24 of the worm jack mechanism 22. The bellows 24a prevents foreign matter such as dust from being adsorbed onto the actuating rod 24.

On the other hand, the polishing machine of the present invention is equipped with a movement distance adjusting means for adjusting the forward and backward movement distance (L) of the first motion base (14). As shown in FIG. 2, the movement distance adjusting means includes a fixed detection sensor 30 which detects the rear position “A” of the first motion base 14, and a front position “” of the first motion base 14. Controller 34 for controlling the rotational direction of the drive motor 20 according to the movable sensing sensor 32 for detecting B ″) and the signals output from the fixed sensing sensor 30 and the movable sensing sensor 32. It consists of.

The fixed detection sensor 30 is fixed to the rear end of the table 12 and is configured to detect the rear position "A" of the first motion base 14. And the movable detection sensor 32 detects the front position ("B") of the first motion base 14, it is possible to move forward or rearward with respect to the fixed detection sensor 30 can adjust the gap. It is configured to be. The controller 34 moves the first motion base 14 forward by rotating the driving motor 20 in the forward direction according to the signal output from the fixed detection sensor 30. In addition, by rotating the drive motor 20 in the reverse direction according to the signal output from the movable detecting sensor 32 serves to move the first motion base 14 to the rear. That is, the controller 34 rotates the drive motor 20 forward or reverse according to the signals output from the fixed detection sensor 30 and the movable detection sensor 32 so that the fixed detection sensor 30 and the movable detection sensor ( Between 32) serves to reciprocate the first motion base (14). Here, a sensing dog (sensing dog) 36 may be formed at one side of the first motion base 14 to detect the fixed sensor 30 and the movable sensor 32. In addition, the first motion base 14 is formed with a guide rail 38 for guiding the movement of the movable sensing sensor 32, and measuring the movement distance of the movable sensing sensor 32 on one side of the guide rail 38. A measurement ruler 38a is formed.

The movement distance adjusting means of this configuration is in a state in which the position of the movable detecting sensor 32 relative to the fixed detecting sensor 30 is adjusted according to the size of the panel P to be polished, that is, the fixed detecting sensor 30 and In the state where the distance between the movable detecting sensor 32 is adjusted, the fixed detecting sensor 30 and the movable detecting sensor 32 cause the front position ("B") and the rear position (") of the first motion base 14. A ″) and by controlling the rotational direction of the driving motor 20 according to the detected signal, it is possible to adjust the forward and backward movement distance ℓ of the first motion base 14.

Referring back to FIG. 1, the polishing machine of the present invention has a tilting body 40 installed in the first motion base 14. The tilting body 40 is rotatably installed around the hinge shaft 42 and is configured to be tiltable by the tilt cylinder 44 installed on the first motion base 14.

The tilting body 40 is provided with a second motion base 46. As shown in FIG. 3, the second motion base 46 is movably installed in the left and right "X" directions with respect to the front indexing machine 1. For this purpose, the second motion base is mounted on the tilting body 40. A pair of guides 48 for guiding the 46 in the left and right "X" directions are provided.

On the other hand, the polishing machine of the present invention includes a left and right movement means for linearly moving the second motion base 46 in the left and right "X" directions. The lateral movement means is such that the rotational movement of the crank arm 52 and the crank arm 52 which are fixed and rotated to the drive motor 50, the output shaft 50a of the drive motor 50 can be changed to reciprocating motion. One end is composed of a link 54 which is connected to the crank arm 52 and the other end is connected to the second motion base 46. The lateral movement means rotates the crank arm 52 as the drive motor 50, converts the rotational movement of the crank arm 52 as the reciprocating motion to the reciprocating motion, and then converts the converted reciprocating motion into the second motion. To the motion base 46. As a result, the second motion base 46 moves along the guide 48 of the tilting body 40 in the left and right "X" directions.

Referring again to FIG. 1, an arm 60 is installed at the second motion base 46, and an abrasive tool 62 is installed at the end of the arm 60. As shown in FIG. 3, the polishing tool 62 is supported by the rotating shaft 62a parallel to the “X” axial direction, which is the movement direction of the second motion base 46, and is installed on the second motion base 46. It is rotated by the polishing tool motor 64. This polishing tool 62 is configured to contact the panel P supported by the support table 3 of the indexing machine 1 to polish the face P1 of the panel P as shown in FIG. 1. . Here, the polishing tool 62 is moved forward and backward by the first motion base 14 moving in the "Y" direction before and after, and the second motion base 46 moving in the "X" direction of left and right, The face P1 of the panel P is polished while moving in the left and right directions.

Next, look at the operation of the present invention having such a configuration as follows. First, as shown in FIG. 1, while the panel P is supported on the table 3 of the indexing machine 1, as shown in FIG. 2, the movable sensor 32 is adapted to the size of the panel P. FIG. Adjust the position to adjust the forward and backward movement distance (ℓ) of the first motion base (14).

Then, when the front and rear movement distance (l) adjustment of the first motion base 14 is completed, the polishing machine of the present invention is operated. Then, as shown in FIG. 1, the polishing tool motor 64 is operated to rotate the polishing tool 62, and then the tilt cylinder 44 is operated to tilt the tilting body 40 forward. On the other hand, as the tilting body 40 is gradually tilted forward, the grinding | polishing tool 62 provided in the arm 60 also descends, and comes close to panel P. FIG. And the grinding | polishing tool 62 which descends further to the bottom starts to polish the face P1 of the panel P, contacting panel P. FIG.

Meanwhile, in the process of the polishing tool 62 polishing the panel P, the forward and backward movement means causes the first motion base 14 to linearly move forward and backward in the "Y" direction, and thus, the first motion base. The tilting body 40 provided on the 14, the second motion base 46 provided on the tilting body 40, and the arm 50 move in the "Y" direction before and after the arm ( As the 50 moves back and forth, the polishing tool 62 installed thereon also polishes the lower panel P while moving in the front and rear (“Y”) directions. Here, the first motion base 14 is a linear reciprocating movement between the fixed detection sensor 30 and the movable detection sensor 32 previously adjusted to the size of the panel (P).

In addition, while the polishing tool 52 polishes the panel P, the horizontal movement means moves the second motion base 46 linearly in the left and right "X" directions as shown in FIG. Accordingly, the arm 50 installed in the second motion base 46 moves in the left and right "X" directions, and as the arm 50 moves left and right, the abrasive tool 62 installed in the left and right "X" also moves. "While moving in the direction to polish the lower panel (P). As a result, the polishing tool 62 rotates about the rotation axis 62a and simultaneously moves the panel P while moving forward, backward, left and right with respect to the panel P.

As described above, the polishing machine of the present invention further increases the polishing efficiency of the panel P by moving the polishing tool 62 for polishing the panel P not only in the left and right directions of the rotation axis but also in the front and rear directions. Promotes In particular, the polishing machine of the present invention allows the polishing tool 62 to be moved forward and backward, and by controlling the movement distance, it is possible to evenly polish panels of various sizes regardless of the size of the panel.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope of the claims.

As described above, the cathode ray tube panel polishing machine according to the present invention further improves the polishing efficiency of the panel by moving the drum polishing tool for polishing the panel not only in the left and right directions of the rotation axis but also in the forward and backward directions. Has an effect. In particular, the drum polishing tool is moved in the front and rear directions, and thus the movement distance can be adjusted, thereby having the effect of evenly polishing panels of various sizes regardless of the size of the panel.

Claims (4)

A panel polishing machine for supporting a panel and constituting a panel polishing system for cathode ray tubes with a supported rotating indexing machine, A frame; A first motion base installed on the frame to linearly move in the Y-axis direction before and after the indexing machine; Forward and backward movement means for reciprocating the first motion base in the Y axis direction; Movement distance adjusting means for adjusting the reciprocating movement distance in the Y-axis direction of the first motion base; A tilting body mounted to the first motion base to be tiltable about a hinge axis; A second motion base installed on the tilting body to linearly move in the left and right X-axis directions with respect to the indexing machine; Left and right movement means for reciprocating the second motion base in the X-axis direction; An arm installed on the indexing machine in the second motion base; A polishing tool rotatably installed on the arm about an axis of rotation in the X-axis direction to polish the panel supported by the indexing machine; And a polishing tool motor installed on the second motion base to rotate the polishing tool. The method of claim 1, wherein the forward and backward movement means comprises a drive motor capable of forward and reverse rotation, and a worm jack mechanism for linearly reciprocating the motion base in the forward and backward directions according to the rotational direction of the drive motor. Panel polishing machine for cathode ray tube. According to claim 1 or 2, wherein the movement distance adjusting means is a fixed detection sensor for detecting the rear position of the motion base, and a movable detection sensor that detects the front position of the motion base, but movable relative to the fixed detection sensor And a controller configured to control a rotational direction of the drive motor of the forward and backward movement means according to the signal output from the fixed detection sensor and the movable detection sensor. The panel polishing machine for cathode ray tube according to claim 3, further comprising a measuring ruler capable of measuring a moving distance of the movable detecting sensor.