KR100355567B1 - Flat grinding device for flat panel for cathode ray tube - Google Patents

Abstract

The present invention provides a planar grinding apparatus for a flat panel for cathode ray tube, comprising: a support frame; A turntable rotatably mounted on the support frame to be rotatable with respect to the support frame; Two or more grinding units disposed along the circumferential direction of the turntable and sequentially grinding the surface of the flat panel pivoting on the turntable; A rotating shaft spaced apart from and parallel to the rotational axis of the turntable, a pair of arms extending from the rotational axis on the turntable and arranged at right angles, and provided at the free end region of each of the arms to adsorb the flat panel; The flat panel provided with at least one suction pick-up member for picking up is placed on the turntable, and the flat panel ground by the grinding unit disposed at a final position along the rotational direction of the turntable. It characterized in that it comprises a loader for taking out from. As a result, the flat surface of the flat panel can be rapidly ground stepwise.

Description

Flat grinding device for flat panel for cathode ray tube

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planar grinding device for a cathode ray tube flat panel, and more particularly, to a planar grinding device for a cathode ray tube flat panel so as to improve the productivity by speeding up the surface processing of the cathode ray panel flat panel.

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 panel has a face portion on which an image is projected, and a skirt portion bent from the edge of the face portion along the circumferential direction, and is joined to the funnel by pleat sealing through the bonding end face of the skirt portion.

The conventional cathode ray tube panel has a disadvantage that the front face portion is formed to be bent toward the front to increase the overall installation space, and the edge region has an inclination angle with respect to vision, so that image recognition is not easy. Therefore, in recent years, flat panel which planarized the front face part of a panel is devised and used. However, if the curvature radius of the face portion is simply increased to planarize, the mechanical strength of the glass tube of the cathode ray tube may drop, and damage may occur to the pleat sealing portion between the panel and the funnel during the vacuum treatment in the manufacturing process. In view of such a problem and the like, recently, a flat panel having a skirt portion removed is used.

The flat panel is formed by heating a glass raw material in a glass melting furnace to a predetermined molten state, and pressing the molten glass gob provided from the glass melting furnace by a press molding apparatus. In the molded flat panel, a depression is formed along the contact edge region of the plunger by a so-called leafless phenomenon when the plunger presses the glass gob.

However, conventionally, a means for processing the flat surface of such a flat panel is not provided, and by using a polishing apparatus using a lapping tool or the like to remove depressions or the like formed on the flat surface of the flat panel, a lot of abrasives are required. In addition to the increase in manufacturing cost, the polishing takes a lot of time, there is a problem that inhibits productivity.

Accordingly, an object of the present invention is to provide a planar grinding device for a flat panel for cathode ray tube that can quickly grind a flat surface of a flat panel.

1 is a front view of a plane grinding device of a flat panel for a cathode ray tube according to the present invention,

2 is a plan view of the planar grinding device of FIG.

3 is an enlarged cross-sectional view of the spindle unit of FIG. 1;

4 is an enlarged plan view of the turntable of FIG. 2;

5 is an enlarged view of the fixing holding means of FIG.

6 is a side view of the fixing holding means of FIG.

7 is a plan view schematically showing the grinding state of the flat panel of the planar grinding device of FIG.

8 is an enlarged plan view of the loader of FIG. 2;

FIG. 9 is an enlarged side view of the arm of FIG. 8. FIG.

* Explanation of symbols for the main parts of the drawings

1: main conveyor 3: flat panel

5: support frame 10: turntable

12: turntable driving motor 13: fixed holding means

15: point projection 17: adsorption member

19: support member 27: toggle link

29: support member driving means 31, 33, 35, 37: grinding part

41: Shore 45: Spindle

47: spindle drive motor 48: cylinder mechanism

51: spindle 53: grinding fluid supply passage

59: grinding wheel 70: loader

71: pivot axis 73: first arm

75: second arm 77: suction pick-up member

The above object is, according to the present invention, a planar grinding device for a cathode ray tube flat panel, comprising: a support frame; A turntable rotatably mounted on the support frame to be rotatable with respect to the support frame; Two or more grinding units disposed along the circumferential direction of the turntable and sequentially grinding the surface of the flat panel pivoting on the turntable; A rotating shaft spaced apart from and parallel to the rotational axis of the turntable, a pair of arms extending from the rotational axis on the turntable and arranged at right angles, and provided at the free end region of each of the arms to adsorb the flat panel; The flat panel provided from the previous process is provided with at least one suction pick-up member for picking up on the turntable, and the flat panel ground by the grinding unit disposed at the final position along the rotational direction of the turntable is removed from the turntable. It is achieved by the planar grinding apparatus of the panel for cathode ray tubes characterized by including the loader for taking out.

Here, it is arranged on the turntable at substantially equal intervals along the circumferential direction to hold the flat panel mounted on the turntable by the loader, and to project toward the bottom of the flat panel and spaced apart from each other to have a triangular shape. A pair of three point protrusions disposed, one or more adsorption members supporting and adsorbing the lower end of the flat panel, and a pair of both ends of the flat panel supported and supported by the adsorption member along the plate surface direction of the flat panel. It is preferable to further include a fixing holding means having a support member.

In addition, it may be more preferable to further include a support member driving means for driving the pair of support members to be mutually accessible.

And, each of the grinding portion, the support which is installed standing up with respect to the support frame, the spindle unit is installed to be rotatable and rotatable with respect to the support, and the coupled to one end of the spindle portion is conveyed by the turntable It is preferable to include a grinding wheel for grinding the surface of the flat panel.

In addition, it is effective that some of the grinding parts have a pair of spindle parts spaced apart in parallel to each other, and the grinding parts include a drive motor for rotating driving of each spindle part.

It further comprises a lift drive motor for the lift drive of the spindle, the grinding wheel is effective to use a diamond grindstone.

The grinding unit may further include grinding liquid supply means for supplying grinding liquid toward the grinding area when grinding the flat panel of the grinding wheel, and further comprising tilting driving means for tilting the spindle unit with respect to the support. Can be.

The rotation driving means may include a cylinder mechanism having one end pivoted to the support frame, and may further include a turntable driving motor for rotating the turntable.

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

1 is a front view of a planar grinding device for a cathode ray tube flat panel according to the present invention, and FIG. 2 is a plan view of the planar grinding device of FIG. As shown in these drawings, the planar grinding device (hereinafter referred to as a grinding device) of the flat panel for cathode ray tube according to the present invention is installed on one side of the main conveyor 1 provided to transport the flat panel 3, Taking the flat panel 3, which is placed and transported on the main conveyor 1, grinding the surface of the flat panel 3 step by step, and then loading it on the main conveyor 1 to be transferred to the subsequent process.

The grinding device includes a support frame 5 installed on one side of the main conveyor 1, and a fixed holding means 13 having a disc shape and arranged at equal intervals along the circumferential direction to hold the flat panel 3 fixed. Is formed on the turntable 10 and the turntable 10 so that the surface of the flat panel 3 which is fixedly held by the fixed holding means 13 and rotated in accordance with the rotation of the turntable 10 can be ground stepwise. A plurality of grinding parts 30 which are spaced apart from each other, and the main panel 1 and the flat panel 3 to be installed so as to be rotatable on the turntable 10 are transferred to the turntable 10, and the finished plane It has a loader 70 for conveying the panel 3 onto the main conveyor 1.

The grinding part 30 is disposed in the circumferential region of the turntable 10 in the circumferential direction of the turntable 10 so as to be spaced apart from each other and fixedly held on the turntable 10 to rotate the surface of the flat panel 3 stepwise. Fourth grinding to finish grinding the first, second and third grinding portions 31, 33 and 35 and the flat panel 3 ground by the first to third grinding portions 31, 33 and 35. It has a portion 37.

Each grinding part has a support 41 which is installed in the circumferential region of the turntable 10 with respect to the support frame 5, and a support arm which is rotatably installed in the upper region of the support 41 with respect to the support 41 ( 43, the spindle portion 45 which is installed in the end region of the turntable 10 side of the support arm 43 substantially in parallel with the support 41, and the support 41 in the other end region of the support arm 43; It has a spindle drive motor 47 for driving each spindle portion 45 with the axis of rotation arranged side by side.

Here, the first to third grinding portions 31, 33, 35 have a pair of spindle portions 45 arranged in parallel with each other, the fourth grinding portion 37 has a single spindle portion 45. . Rotating arm 49 is formed in one side end area of the rotational axis of the support arm 43 so as to be rotatable integrally with the rotational axis, and one side of the support frame 5 is formed in the free end area of the rotational arm 49. A cylinder mechanism 48 is pivoted so as to be rotatable and tilts the spindle 45 apart from the turntable 10.

3 is an enlarged cross-sectional view of the spindle unit of FIG. 1. As shown, the spindle portion 45 is coupled to the spindle 51 is disposed substantially parallel to the support 41, the grinding surface is disposed parallel to the plate surface of the turntable 10 at the lower end of the spindle 51 And a grinding wheel 59 and a spindle housing 61 fixedly coupled to the support arm 43 to rotatably support the spindle 51. The spindle 51 has a grinding liquid supply path 53 formed therein so that the grinding liquid can be supplied along the axis, and at the lower end of the spindle 51, the spray nozzle 55 sprays the grinding liquid toward the flat panel 3. ) Is combined.

A rotary joint 57 is coupled to the upper region of the spindle 51 so as to supply grinding fluid from the outside into the spindle 51, and the spindle 51 is vertically arranged along the axial direction at the upper end of the spindle housing 61. Spindle drive motor 63 for moving is coupled. A pulley 65 is coupled to the lower side of the rotary joint 57 along the axial direction of each spindle 51 so as to be connected to the spindle drive motor 47 by mutual belts so as to receive a driving force.

4 is an enlarged plan view of the turntable of FIG. 2, FIG. 5 is an enlarged view of the fixing holding means of FIG. 4, and FIG. 6 is a side view of the fixing holding means of FIG. 5. As shown in these figures, the turntable 10 has a substantially disk shape, and the lower side of the turntable 10 is installed so as to stand on the support frame 5 to rotate the support 11 for rotating the turntable 10 It is installed. The turntable 10 maintains the flatness within 2 / 100mm so that the stacked flat panel 3 can be flattened, and there should be no shaking during rotation.

The turntable driving motor 12 for rotating the turntable 10 is installed at one side of the rotation supporting part 11, and the turntable driving motor 12 is fixed to the fixed holding means 13 to rotate the flat panel ( 3) It is preferable to drive the turntable 10 at a predetermined rotational speed so as to have an appropriate feed speed with respect to the grinding wheel 59 of the spindle portion 45, and an inverter motor capable of adjusting the rotational speed.

On the upper surface of the turntable 10, fixed holding means 13 are arranged at equal intervals along the circumferential direction to hold the flat panel 3 fixed. The fixed holding means 13 has a substantially rectangular shape so as to support the rectangular flat panel 3. The fixed holding means 13 has three point protrusions 15 protruding a predetermined height toward the lower end of the flat panel 3 and having a triangular shape to support the flat panel 3, and the flat panel 3. Three adsorption members 17 arranged to form an inverted triangle with respect to the point protrusions 15, and a flat panel 3 supported from below by the adsorption member 17 and the point protrusions 15. It has a support member 19 for pressing and supporting both ends of the.

The supporting member 19 is disposed to be parallel to the short side of the fixed holding means 13 so as to be slidable along the long axis direction of the fixed holding means 13. A pair of guide members 21 are provided between the support members 19 to be parallel to the support member 19, and inside each guide member 21, the guide members 21 are arranged to be parallel to the support member 19. A driving member 23 for slidingly driving 19 is provided. The driving member 23 and the supporting member 19 are connected to each other by a pair of guide rods 25 coupled to penetrate the guide member 21, and a toggle link (in the center region of each driving member 23) is provided. 27 are each connected. Each toggle link 27 is connected to the support member driving means 29 installed to be stretchable toward the center of the turntable 10, so as to press each drive member 23 when the support member driving means 29 is extended. The support members 19 are spaced apart from each other, and when the support member driving means 29 shrinks, the drive members 23 approach each other so that the support members 19 press and support both ends of the flat panel 3.

7 is a plan view schematically showing a grinding state of the flat panel of the grinding apparatus of FIG. As shown, on the support frame 5, the first to fourth grinding portions are arranged along the circumferential direction of the turntable 10 so that the flat panel 3 fixed on the turntable 10 can be ground stepwise while turning. It is. A pair of spindle part 45 is arrange | positioned at the 1st-3rd grinding part 31, 33, 35, The 4th grinding part 37 is provided with the single spindle part 45. As shown in FIG.

The grinding wheel 59 coupled to the lower end of each spindle 51 preferably uses diamond as an abrasive grain, and the grinding wheel 59 of the first to third grinding parts 31, 33, and 35 arranged in pairs. ) Is 200mm in diameter and 60 ~ ## is suitable for particle size. And the grinding wheel 59 of the 4th grinding part 37 which has the single spindle part 45 is 400 mm in diameter, and about 100-120 # of a particle size is preferable.

On the other hand, the grinding amount of each grinding portion (31, 33, 35, 37) is preferably to be reduced step by step, and specifically described, for example, the first grinding portion 31 is roughly 1.5 mm in the roughing process The second grinding portion 33 is 0.5 mm by roughing, and the third grinding portion 35 is 0.3 mm by grinding. The fourth grinding portion 37 is preferably about 0.1 mm in grinding depth by finishing for finishing.

The rotation speed of the spindle 51 of the first to third grinding parts 31, 33, and 35 is 1500 to 1800 R.PM, and the rotation speed of the spindle 51 of the fourth grinding part 37 is 1000. ~ 1500 R.PM is effective.

8 is an enlarged plan view of the loader of FIG. 2, and FIG. 9 is an enlarged side view of the first arm of FIG. 8. As shown in these figures, the loader 70 has a rotational shaft 71 which is erected on the path of the main conveyor 1 and an axial direction of the rotational shaft 71 in the upper region of the rotational shaft 71. A suction pick-up member coupled to the pair of first arms 73 and second arms 75 which are installed horizontally on the free end portions of the arms 73 and 75 to pick up the flat panel 3 by suction; 77).

The first arm 73 and the second arm 75 are disposed on the rotational shaft 71 such that mutual angles of about 85 degrees are obtained in consideration of the rotational speed of the turntable 10. The suction pick-up member 77 has a linear reciprocating motion with respect to the cylinder 79 and the cylinder 79 which are horizontally installed in the longitudinal direction of each arm 73 and 75 at the free end regions of each arm 73 and 75. It has a cylinder rod 81, a support bracket 83 coupled to the free end region of the cylinder rod 81, and three adsorption pads 85 arranged in a substantially triangular shape at the lower end of the support bracket 83.

By this configuration, when the flat panel 3 provided from the previous process is placed on the main conveyor 1 and reaches a predetermined pick-up position, the pivot shaft 71 has the first arm 73 at the main conveyor 1. It is rotated to be located at the pick-up position of the image. At this time, as the cylinder rod 81 of the first arm 73 moves to extend from the cylinder 79, the suction pad 85 is lowered. When the suction pad 85 adsorbs the surface of the flat panel 3, the cylinder rod 81 moves in the contracting direction so that the flat panel 3 is picked up.

Almost at the same time as the pickup of the flat panel 3 of the first arm 73, the second arm 75 picks up the finished flat panel 3 on the turntable 10 by suction. When the first and second arms 73 and 75 respectively pick up the flat panel 3, the pivot shaft 71 has the first arm 73 facing the turntable 10 and the second arm 75 the main conveyor. It is rotated to be located at the unloading position on (1). When the first arm 73 is positioned on the fixed holding means 13 on the turntable 10, the cylinder rod 81 is lowered to unload the flat panel 3 to be processed onto the fixed holding means 13. At the same time, the cylinder rod 81 of the second arm 75 is also lowered so that the flat panel 3 can be unloaded so that the finished flat panel 3 is placed on the main conveyor 1.

On the other hand, when the flat panel 3 to be processed on the fixed holding means 13 is unloaded by the first arm 73, the adsorption member 17 vacuum-adsorbs the lower surface of the flat panel 3 to lower it. do. At this time, the flat panel 3 is kept horizontal with respect to the turntable 10 by the point protrusions 15 arranged to have a triangular shape. The extended support member driving means 29 drives the toggle link 27 coupled to the end while being contracted, and the support member 19 presses the end of the flat panel 3 by driving the toggle link 27. To fix the flat panel 3. Then, the loader 70 rotates and waits for the first arm 73 to be positioned on the main conveyor 1.

As the turntable 10 rotates at a predetermined rotational speed, when the flat panel 3 stacked on the fixed holding means 13 reaches the first grinding portion 31, the spindle lift drive motor 63 The cutting depth of the grinding wheel 59 with respect to the flat panel 3 is adjusted by elevating the spindle 51 to fit the position of the flat panel 3 sensed by a sensor (not shown).

When cutting is started while a pair of grinding wheels 59 arranged in parallel with the turning flat panel 3 are contacted, grinding fluid is externally supplied through a rotary joint 57 coupled to the upper portion of each spindle 51. Will be supplied. The grinding fluid flows along the axis of the spindle 51 and is injected toward the flat panel 3 through the injection nozzle 55 coupled to the axis of the grinding wheel 59. The flat panel 3 roughly processed in the first grinding portion 31 is processed stepwise while passing through the second grinding portion 33, the third grinding portion 35, and the fourth grinding portion 37 to be loaded at the first loading position. When it reaches to be transported back onto the main conveyor (1) by the loader (70).

As described above, according to the present invention, the flat panel to be processed is transported by a single turntable, so that the flatness required for transporting the flat panel can be easily maintained. In addition, a plurality of grinding parts are disposed along the circumferential direction of the turntable to simultaneously grind other flat panels, thereby rapidly grinding the flat surfaces of the flat panels step by step, unlike conventional grinding methods using a lapping machine or the like. A planar grinding device for a cathode ray tube flat panel is provided.

Claims (11)

In the flat grinding device of the flat panel for cathode ray tube, A support frame; A rotating shaft spaced apart from and parallel to the rotational axis of the turntable, a pair of arms extending from the rotational axis on the turntable and arranged at right angles, and provided at the free end region of each of the arms to adsorb the flat panel; A turntable having one or more suction pick-up members for picking up and rotating the flat panel mounted to be rotatable with respect to the support frame; Two or more grinding units disposed along the circumferential direction of the turntable and sequentially grinding the surface of the flat panel pivoting on the turntable; A rotating shaft spaced apart from and parallel to the rotational axis of the turntable, a pair of arms extending from the rotational axis on the turntable and arranged at right angles, and provided at the free end region of each of the arms to adsorb the flat panel; A flat panel provided by at least one suction pick-up member for picking up the flat panel provided from the previous process on the turntable, and the flat panel ground by the grinding unit disposed at a final position along the rotational direction of the turntable; And a loader for taking out from the planar grinding apparatus of a panel for a cathode ray tube. The method of claim 1, Disposed at substantially equal intervals along the circumferential direction on the turntable to hold the flat panel mounted on the turntable by the loader, and to be projected toward the bottom of the flat panel and spaced apart from each other to have a triangular shape. Three point protrusions, one or more adsorption members for adsorption supporting the lower end of the flat panel, and a pair of support members for pressing and supporting both ends of the flat panel supported by the adsorption member along the plate surface direction of the flat panel. Planar grinding device for a cathode ray tube flat panel further comprising a fixing holding means having. The method of claim 1, And a support member driving means for driving the pair of support members such that the pair of support members are accessible to each other. The method of claim 1, Each grinding part, Grinding the surface of the flat panel conveyed by the turntable coupled to one end of the spindle and the spindle portion is installed so as to move up and down with respect to the support, and to be rotatable at the same time to the support frame; Planar grinding device for a flat panel for cathode ray tubes comprising a grinding wheel to. The method of claim 4, wherein Some of the grinding parts have a pair of spindle parts spaced apart in parallel to each other, the grinding part plane grinding apparatus of a flat panel for cathode ray tubes, characterized in that it comprises a drive motor for rotational drive of each spindle part. The method of claim 5, And a lifting drive motor for lifting and lowering the spindle unit. The method of claim 4, wherein The grinding wheel is a flat grinding device for a flat panel for cathode ray tubes, characterized in that using a diamond grinding wheel. The method of claim 4, wherein The grinding unit further comprises a grinding fluid supply means for supplying a grinding fluid toward the grinding area when the grinding of the flat panel of the grinding wheel flat panel grinding apparatus for cathode ray tubes. The method of claim 4, wherein And a tilting driving means for tilting the spindle portion with respect to the strut. The method of claim 9, And said rotational driving means is a cylinder mechanism whose one end is pivotally supported by said support frame. The method of claim 1, Planar grinding device for a flat panel for cathode ray tube, characterized in that it comprises a turntable driving motor for rotating the turntable.