KR20000026180A - Measurement system of panel for cathode ray tube - Google Patents

Abstract

PURPOSE: A measurement system of a panel for a cathode ray tube is provided to rapidly and precisely determine the pass of the measurement result, to minimize the loss in manufacturing processes and to enhance reliability and preciseness. CONSTITUTION: A measurement system of a panel for a cathode ray tube comprises a base(24), a shuttle(30), a turn table(40), a positioned(50), a robot(80), a discharge unit and a computer. The shuttle is mounted on the base in order to be moved by an actuator. The turn table is rotated on the base by the actuator. The positioned is mounted on the turn table in order to present a measurement position on the base. The robot has a carrier(90) moving first and second measurement units for measuring a shape and a roughness of the panel. The discharge unit is mounted on a front side of the base to discharge the panel from the turn table.

Description

Measurement system of panel for cathode ray tube

The present invention relates to a measuring system for a cathode ray tube panel for automatically measuring the dimensions, shape and roughness of a cathode ray tube panel.

Cathode ray tubes used in the manufacture of color televisions and computer monitors are basically three components: a panel through which images are projected, a conical funnel attached to the back of the panel, and welding at the vertices of the channel. It consists of a tubular neck. The panel has a face and a skirt, and an imaging phosphor is applied to the inner surface of the face, and a shadow mask having a plurality of holes is supported by the pin. An electron gun is installed in the neck, and the electron gun generates an image by firing an electron beam through a hole of a shadow mask with a phosphor.

The panels, channels and necks of these cathode ray tubes are all made of glass. In particular, the panel and channel will produce a molten glass mass called a gob by press molding into a desired size and shape. Since the molded article produced by the molding process generally has a rough surface, it is necessary to properly polish the surface of the molded article to remove optical defects in order to improve the image quality of the cathode ray tube. If the molded article is a panel, the surface which needs to be polished is the seal edge of the face and the skirt to which the channel is to be welded.

In the meantime, the panel performs sampling inspection to maintain uniformity of quality. The measurement items of the panel by sampling inspection can be largely divided into dimensions, shapes, and roughness, and there are about 15 measurement items. For example, the measurement details include the thickness of the seal edge, the center thickness of the face, the high pin of the seal edge, the out bevel, the seal land width, and the like.

However, since the measurement of the shape and roughness of the panel as described above is usually made by the operator's manual work and the shape and roughness measuring device, there is a problem that the measurement process is complicated and cumbersome. In addition, in order to measure the shape and roughness of the panel, it is necessary to take a sample of approximately 24 cuts of the panel, and thus, it takes an excessive time to collect the sample and measure the panel. In particular, the collection and handling of the sample requires careful attention and requires skilled work, and the collection of the sample is performed in a separate collection room from the measurement room, resulting in inefficient and inefficient economic problems. In order to improve this, the shape and roughness of the panel are measured by about eight samples, but the measurement process is insufficient.

On the other hand, in order to determine the passability by comparing the measurement results of the panel with the determination criteria, the measurement results of the shape and roughness of the individually measured panels should be collected and data-formed, and then compared with the determination criteria. Too much time was spent. In addition, when the panel's measurement result is judged to fail, it is necessary to identify the cause and take corrective action at the manufacturing site, or to delay the corrective action because the measurement result cannot be delivered to the manufacturing site promptly. Furthermore, there was a problem that caused enormous obstacles in the production of the panel. In addition, when the manufacturing site is divided and installed, it is difficult to share data on the measurement results of the panel, causing problems in carrying out the panel research and development collectively.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a measuring system of a panel for a cathode ray tube to perform the measurement automatically.

Another object of the present invention is to provide a measuring system for a cathode ray tube panel that can quickly determine whether or not the result of a measurement is passed.

It is still another object of the present invention to provide a panel measurement system for cathode ray tubes in which measurement accuracy is improved.

It is still another object of the present invention to provide a measurement system for a cathode ray tube panel that can share the measurement results by data.

It is another object of the present invention to provide a measuring system for a cathode ray tube panel capable of efficient and economical operation.

It is still another object of the present invention to provide a measuring system for a cathode ray tube that enables measurement without taking a sample.

1 is a cross-sectional view showing a panel for a typical cathode ray tube,

2 is a front view schematically showing a measuring system of a panel for a cathode ray tube according to the present invention;

3 is a plan view showing a measuring system according to the present invention;

4 is a front view showing a measurement system according to the present invention,

5 is a side view showing a measurement system according to the present invention;

6 is a perspective view of a positioner of the measuring system according to the present invention;

7 is a plan view showing a positioner of the measuring system according to the present invention;

8 is a front view showing a positioner of the measuring system according to the present invention;

9 is an operating state diagram of FIG. 8, FIG.

10 is a side view of the discharge unit in the measurement system according to the invention.

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

10: Panel 20: Measuring system

24: base 30: shuttle

40: turntable 50: positioner

60: support pin 68: vacuum pad

80: robot 90: carrier

100: first measuring unit 120: second measuring unit

140: discharge unit 160: computer

Features of the present invention for achieving this object, the base; A shuttle installed on the upper surface of the base to be movable by driving of an actuator; A turntable rotatably installed on an upper surface of the shuttle by driving of an actuator; A positioner installed on an upper surface of the turntable to determine a position of the panel and provide a measurement position; A robot having a carrier for linearly moving the first and second measuring means for measuring the shape and roughness of the panel; A discharge unit installed at the front of the base to discharge the panel from the turntable; A measurement system for a cathode ray tube panel that includes a computer controlling the measurement process of the panel.

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

1 to 10 are diagrams for explaining the measurement system of the panel for cathode ray tubes according to the present invention.

First, as shown in FIG. 1, the panel 10 of the cathode ray tube includes a face 12 and a skirt 14 formed rearward from the edge of the face 12. The skirt 14 has a seal edge 16, and a mold match line 18, which is a press molding mark, is left on the side of the skirt 14. The panel 10 is formed into a substantially rectangular shape having a long axis and a short axis, and the dimensions of the panel 10 are divided using an inch unit according to the diagonal length.

As shown in Figs. 2 to 5, the panel 10 is supplied to a supply position of the measuring system 20 for measuring shape and roughness. Detailed measurement items for the shape of the seal edge 16 of the measurement system 20 include high pins, out bevels, seal land widths, and the like. The measuring system 20 has a bed 22 and a base 24 is installed on the upper surface of the bed 22. A plurality of guide holes 26 are formed side by side in the longitudinal direction on the upper surface of the base 24, the shuttle (30) is installed on the upper surface of the base 24 to move along the guide hole 26. . A plurality of transfer nuts 32 are mounted on the lower surface of the shuttle 30, and the transfer nuts 32 of the shuttle 30 are installed to be movable along the transfer screw shaft 36 by driving the actuator 34. On both sides of the feed screw shaft 36, a plurality of guide bars 38 for guiding the linear movement of the shuttle 30 are provided side by side. At this time, the shuttle 30 is moved from the supply position capable of supplying the panel 10 by the driving of the actuator 34 to the measurement position or to the discharge position capable of discharging the panel 10 from the measurement position. The turntable 40, on which the panel 10 is placed, is placed on the upper surface of the shuttle 30, the turntable 40 is rotated by the driving of the actuator 42, and the turntable 40 is driven by the actuator 42. Rotate 90 degrees. Here, the actuator 42 may use a step motor.

6 to 8, a positioner 50 for determining the position of the panel 10 is provided on the top surface of the turntable 40. The positioner 50 is installed on the lower surface of the tentable 50 such that a plurality of cylinders 52 have rods 52a, and connecting rods 54 protrude upward of the turntable 40 on both sides of the rods 52a. The moving block 56 is mounted at the tip of the connecting rod 54. An installation groove 58 is formed in the center of the moving block 56, and a support pin 60 supporting the face 12 of the panel 10 is installed in the installation groove 58 of the moving block 56. The tip of the support pin 60 is formed into a spherical surface 60a. In the figure, three support pins 60 are disposed to be installed to support the face 12 three points, but the number and position of the support pins 60 can be changed as appropriate.

In addition, the positioner 50 has a connecting plate 62 connected to one side of the connecting rod 54, and a post 64 is provided with an elastic force of the spring 66 on the upper surface of the connecting plate 62 to turntable 40. It is installed to enable the upward and downward movement of the upper side, and a vacuum pad 68 for adsorbing the face 12 on the tip of the post 64 is mounted. Although the vacuum pad 68 was shown so that two may be located in the same straight line between the support pins 60, the number and position of the vacuum pad 68 can be changed suitably. A pad 70 is mounted between the vacuum pads 68 to protect the panel 10 from falling. The support pin 60 and the vacuum pad 68 of the positioner 50 are lifted to provide a measurement position for performing the measurement of the panel 10.

Referring again to FIGS. 2 and 4, the measurement system 20 has a robot 80, and the robot 80 has a plurality of columns 82 installed on the upper surface of the bed 22, and the columns 82. Horizontal rails 84 are installed at the top of the. The carrier 90 is installed to be linearly moved by driving the actuator 86 along the horizontal rail 84 of the robot 80. A moving plate 92 is provided to the carrier 90 to drive the cylinder 94. It is installed to enable the lifting and lowering movement.

On the other hand, one side of the moving plate 92 is provided with a first measuring unit 100 for measuring the shape of the panel 10. The first measuring unit 100 has a measuring block 104 which is moved up and down by driving the cylinder 102, and the measuring block 104 has a minimeter 110 on the surface of the panel 10. It is mounted to have a stylus 112 that moves in contact with it. The minimeter 110 of the first measuring unit 100 measures the shape of the seal edge 16 of the panel 10 before polishing.

In addition, a second measuring unit 120 is installed on one side of the moving plate 182 to be adjacent to the first measuring unit 100. The second measuring unit 120 is mounted such that the measuring block 124 moves up and down by driving the cylinder 122, and the measuring block 124 is equipped with a minimeter 130 and the minimeter 130. Is configured to have a stylus 134 that moves in contact with the surface of panel 10 on one side of pick up 132. The minimeter 130 of the second measurement unit 120 measures the roughness of the panel 10 after polishing.

As shown in FIG. 10, a discharge unit 140 is installed in the base 24 of the measurement system 20 so as to discharge the panel 10 from the turntable 40. The discharge unit 140 has a bracket 142 mounted on one side of the base 24, and a plurality of support bars 144 are mounted on the upper surface of the bracket 142 in parallel with each other. Here, the height of the support bar 144 is mounted lower than the measuring position of the measuring system 20 so as not to interfere with the face 12 of the panel 10. The outer circumferential surface of the support bar 144 is covered with a plurality of covers 146 to protect the panel 10, the cover 146 is preferably made of a resin material. In front of the base 24, a sensor 150 for detecting a state in which the shuttle 30 is moved to the discharge position is installed.

As shown in FIG. 2, the present invention includes a computer 160 that controls a series of measurement processes. The computer 160 has a microprocessor, input devices such as a keyboard and a mouse, and output devices such as a monitor and a printer. The computer 160 includes a control console 162 which can be moved freely. Connected by). The operation of the computer 160 can be controlled by manual operation of the control console 162, and the operator can easily check the abnormal state of the measurement process by using the control console 162, thereby increasing the flexibility of the operation. On the other hand, the computer 160 sequentially controls the driving of the measurement system 20 according to information, such as a preset order, condition, position, and the like, and stores and outputs the measurement result obtained by driving the measurement system 20. Make data and save. In addition, the computer 160 can be easily connected to another computer to implement a local area network. On the other hand, the measuring system 20 of the present invention, the centering device 170 centering the panel 10, and the panel 10 centered in the centering device 170 to the measuring position of the measuring system 20 The transfer can be operated in conjunction with the transfer device 180 and the three-dimensional measuring device 190 for measuring dimensions, overall height, wedges, etc. by three-dimensional measurement of the panel 10.

Referring to the operating state of the measurement system of the cathode ray tube panel according to the present invention as described above are as follows.

As shown in FIGS. 4 and 5, the panel 10 is centered by the driving of the centering device 170 and then supplied to the measuring position of the measuring system 20 by the driving of the conveying device 180. Before the panel 10 is supplied to the measurement position, the panel 10 is placed on the upper portion of the positioner 50 in a state in which the support pin 60 and the vacuum pad 68 of the positioner 50 are raised and lowered by driving the cylinder 52. ). When the panel 10 is supplied in this way, the spherical surface 60a of the support pin 60 supports the face 12 three points to stably support the panel 10, and the vacuum pad 68 has a face 12. ) To prevent the flow of the panel 10, thereby determining the measurement position of the panel 10. When the vacuum pad 68 adsorbs the face 12, the post 64 moves up and down by the elastic deformation of the spring 66 to absorb the shock, thereby making the adsorption stable.

After the measurement position of the panel 10 is determined by the positioner 50 of the measurement system 20, the shuttle 30 is moved to the measurement position of the measurement system 20 by driving the actuator 34. When the actuator 86 of the robot 80 is driven, the carrier 90 moves along the horizontal rail 84. At the same time, the moving plate 92 is lowered by driving the cylinder 94 to reach the measurement positions of the first and second measuring units 100 and 120, and then the first and the first 2 The measurement units 100 and 120 are driven to measure the shape and roughness of the panel 10.

The first measuring unit 100 measures the shape of the seal edge 16 before polishing, and the measuring block 104 of the first measuring unit 100 moves linearly by the driving of the robot 80 and the cylinder The drive of the 102 causes the movement of up and down. By the linear movement of the measurement block 104 and the movement of the up and down movements, the stylus 112 of the minimeter 130 moves on the surface of the seal edge 16 while corresponding to the unevenness of the seal edge 16. Will exercise. By inputting the mechanical motion of the stylus 112 as an electrical signal to the computer 160, it is possible to measure the high pin, the out bevel, the seal land width, and the like of the seal edge 16 before polishing.

Meanwhile, the second measuring unit 120 measures the roughness of the panel 10 after polishing, and the measuring block 124 of the second measuring unit 120 moves linearly by driving the robot 80. The cylinder 122 is moved up and down by driving. The stylus 134 of the minimeter 130 moves the surface of the panel 10, for example, the surface of the face 12 by the linear motion and the up / down motion of the measurement block 124. Mechanical motion corresponding to the unevenness of), and corresponding to the mechanical motion of the stylus 134, the pickup 132 is dynamic. By inputting the dynamic motion of the pickup 132 as an electrical signal to the computer 160, it is possible to measure the roughness of the panel 10 after polishing. As such, the shape and roughness of the panel 10 before and after polishing can be performed by the first and second measuring units 100 and 120 of the measuring system 20 in one measuring position, thereby continuity and efficiency of work. This is improved.

In addition, it is not necessary to take a sample of the panel 10, the measurement work is simplified, not only does not require a professional and a lot of manpower for the measurement work, it is also possible to significantly reduce the measurement time. Then, the measurement result of the measurement system 20 is input to the computer 160, and the computer 160 converts the measurement result input from the measurement system 20 into data and compares it with the determination criteria, and determines whether or not the result is passed. .

As shown in FIGS. 3 and 10, when measurement of the shape and roughness of the panel 10 is completed by driving the measurement system 20, the turntable 40 is rotated by driving the actuator 42 to cause the panel 10 to be rotated. ) Is positioned so that the long axis of the base plate 24 faces the longitudinal direction of the base 24. The shuttle 30 is then moved from the measurement position of the measurement system 20 to the discharge position along the feed screw shaft 36 by the drive of the actuator 34. When the shuttle 30 reaches the discharge position, the movement of the shuttle 30 is sensed by the operation of the sensor 150, and according to the signal input from the sensor 150, the computer 160 of the shuttle 30 After the movement is stopped, the rod 52a is retracted by the driving of the cylinder 52 to return the support pin 60 and the vacuum pad 68 to the initial position. In the process of returning the support pin 60 and the vacuum pad 68 to the initial position, the face 12 of the panel 10 is placed on the support bar 144 of the discharge unit 140. In this case, the cover 146 protects the panel 10 from impact to prevent scratches and the like. The long axis of the panel 10 is placed along the longitudinal direction of the support bar 144 to be easily discharged by the operator, the pad 70 from the impact when the panel 10 is inadvertently dropped by the panel ( 10) to prevent damage. After discharging the panel 10 from the support bar 144 of the discharging unit 140, the shuttle 30 is returned from the discharging position to the measuring position by driving the actuator 34.

On the other hand, the above embodiment is only a description of the preferred embodiment of the present invention, the scope of application of the present invention is not limited to this, and can be changed as appropriate within the scope of the same idea. For example, the shape and structure of each component shown in the embodiment of the present invention can be modified. In addition, the present invention can be widely used for the measurement of various boards, plates and the like in addition to the measurement of the panel.

As described above, according to the measuring system of the cathode ray tube panel according to the present invention, since the shape and roughness of the panel can be automatically measured by computer control, it is possible to quickly and accurately determine whether the measurement result is passed. In addition, even if there is an abnormality in the measurement results of the panel can be quickly taken to the manufacturing site, etc. to minimize the loss of the manufacturing process. In addition, accuracy and reliability are improved due to the automation of the measurement, and the measurement results can be efficiently managed by data. In addition, since computer data can be easily shared by building a local network, panel research and development can be performed collectively, and efficient and economical operation is possible. In addition, the sample collection operation is unnecessary, which simplifies the measurement operation and reduces unnecessary manpower and waste of time.

Claims (6)

A base; A shuttle installed on an upper surface of the base to be movable by an actuator; A turntable rotatably installed on an upper surface of the shuttle by driving an actuator; A positioner installed on an upper surface of the turntable to determine a position of the panel to provide a measurement position; A robot having a carrier for linearly moving first and second measuring means for measuring the shape and roughness of the panel; A discharge unit installed in front of the base to discharge the panel from the turntable; A system for measuring a cathode ray tube panel comprising a computer for controlling the measuring process of the panel. The method of claim 1, wherein the positioner, A plurality of cylinders installed to have a rod on a lower surface of the tentable; Connecting rods connected to both sides of each of the rods to protrude upward of the turntable; A moving block mounted at a tip of the connecting rod; A support pin installed at the center of the moving block to support a three-point face of the panel; A connecting plate connected to one side of the connecting rod; A plurality of posts installed on the upper surface of the connecting plate to allow the spring plate to move upward and downward by receiving an elastic force of a spring; A system for measuring a cathode ray tube panel, comprising a vacuum pad mounted to a front end of the post to absorb a face of the panel. The method of claim 1, wherein the first measuring means, A measurement block which is moved up and down by driving a cylinder; And a minimeter having a stylus mounted on the measuring block and moving in contact with the surface of the panel. The method of claim 1, wherein the first measuring means, A measurement block which is moved up and down by driving a cylinder; And a minimeter mounted to the measuring block and having a stylus mounted on one side of the pickup so as to be moved in contact with the surface of the panel. According to claim 1, wherein the discharge unit is a bracket is mounted on one side of the base, a plurality of support bars on which the panel is placed on the upper surface of the bracket is mounted in parallel with each other, respectively, the panel on one side of the bracket Measurement system for a cathode ray tube panel equipped with a sensor that detects the movement to the discharge position. The system of claim 5, wherein the height of the support bar is mounted lower than the measurement position so as not to interfere with the face of the panel.