KR100543807B1 - Measurement system of panel for cathode ray tube - Google Patents

Abstract

The present invention relates to a measurement system for a panel for a cathode ray tube. The present invention is equipped with a base, the positioner is installed on the upper surface of the base to enable the lifting, lowering movement to provide a measuring position by determining the position of the panel. The reference gauge is installed to enable the up and down movement to provide a reference plane of measurement on the upper surface of the base, and the robot moves the probe of the first touch sensor detecting the panel up, down, left and right, and the discharge device It is installed so as to be movable along the discharge panel at the measurement position, the measurement process of this panel is computer controlled. Therefore, the three-dimensional measurement of the panel can be automatically performed by computer control, so that not only can the judgment of the result of the measurement be passed quickly and accurately, but also if the panel measurement results are abnormal. Measures can be taken to minimize losses in the manufacturing process. In addition, precision 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.

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 and shape of the cathode ray tube panel by three-dimensional measurement.

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 out bevel, and the like.

However, the measurement of the panel as described above is usually made individually by the operator's manual and three-dimensional measuring machine. For example, the height of the panel and the center thickness of the face are measured manually by vernier calipers, dial gauges, height gauges, and the like. There is a problem that the measurement process is complicated and cumbersome because a three-dimensional measuring instrument is used. In addition, when the thickness of the panel is measured by the operator's manual work, there is a high possibility that a measurement error may occur due to a mistake of the operator. In addition, in order to measure the thickness and shape of the panel, it is necessary to take a sample of approximately 24 cuts of the panel, so that it takes an excessive amount of 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 thickness and dimension of the panel are measured by about eight samples, but the situation is insufficient for the simplification of the measurement process.

On the other hand, in order to determine the passability by comparing the measurement results of the panel with the criterion for determination, it is necessary to collect the measurement results for the dimensions and shapes of the individually measured panels and make them into data, and then compare them with the criterion for determination of acceptance. 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.

Features of the present invention for achieving this object, the base; On the upper surface of the base, the cathode ray tube panel is installed to enable the lifting and lowering movement to provide the measurement position, and a number of cylinders installed to have a rod on the lower surface of the base, and the panel's hayss on the rod of the cylinder. A positioner having a support pin installed to support the vacuum pin and a vacuum pad mounted to absorb a face of the panel; The cylinder can be moved up and down by the positioner's cylinder to provide a reference plane of measurement on the upper surface of the base, and a gauge pin is provided at the center of the upper surface to support the center of the panel's face to provide a measuring support point. A reference gauge; A robot configured to vertically and horizontally rotate the probe of the first touch sensor detecting the panel; A discharging device comprising a carrier unit having a plurality of support bars on which the panel is mounted to move along the base and discharging the panel at the measurement position, and a rodless cylinder for moving the carrier unit; 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 12 are views for explaining the measurement system of the cathode ray tube panel 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, 3 and 4, the panel 10 is supplied to the measurement position of the measurement system 20 which performs three-dimensional measurement. The measuring system 20 measures the dimensions of the panel 10 and the thickness of the seal edge 16, the inner and outer diagrams, and the central thickness of the face 12, overall height, wedges and pins by three-dimensional measurements. Approximately nine items can be measured: a pin plane edge roll, a pin clearance, and a mold match outside diagram.

On the other hand, the measurement system 20 has a surface plate 22 which can maintain the accuracy of measurement, and a base 24 is provided on one side of the upper surface of the surface plate 22, and a plurality of guide holes are provided on the rear upper surface of the base 24. (26) are formed side by side along the longitudinal direction. On the upper surface of the base 24, a positioner 30 is provided to provide a measurement position so that the position of the panel 10 can be determined and measured.

5 to 7, the positioner 30 is installed on the lower surface of the base 24 such that a plurality of cylinders 32 have rods 32a, and connecting rods 34 on both sides of the rod 32a. Is connected to protrude upward of the base 24, and the moving block 36 is mounted at the tip of the connecting rod 34. An installation groove 38 is formed in the center of the moving block 36, and a support pin 40 for supporting the face 12 of the panel 10 is installed in the installation groove 38 of the moving block 36. The tip of the support pin 40 is formed into a spherical surface 40a. In the figure, three support pins 40 are disposed to be installed to support the face 12 three points, but the number and position of the support pins 40 can be changed as appropriate.

In addition, the positioner 30 has a connecting plate 42 connected to one side of the connecting rod 34, and a post 44 is provided with an elastic force of the spring 46 on the upper surface of the connecting plate 42 to receive the base 24. It is installed to enable the upward and downward movement of the upper side, and a vacuum pad 48 for adsorbing the face 12 on the tip of the post 44 is mounted. Although the vacuum pad 48 was shown so that two may be located in the same straight line between the support pins 40, the number and position of the vacuum pad 48 can be changed suitably. The support pin 40 and the vacuum pad 48 of the positioner 30 are lifted to provide a measurement position for performing the measurement of the panel 10.

5 and 8, the upper surface of the base 24 is provided with a reference gauge 50 that intersects between the vacuum pads 48, and the reference gauge 50 includes a plurality of posts 52. The upper and lower surfaces of the connecting plate 42 are fixed together with the support pins 40 and the vacuum pads 48 so that the lifting and lowering motions are possible. The reference gauge 50 has vertical bars 50b vertically formed on both sides of the horizontal bar 50a, and inclined surfaces 50c are formed at both corners of the horizontal bar 50b, respectively. At the ends, the reference bars 50d are formed horizontally, respectively. Here, the reference gauge 50 is formed so that the width of the horizontal bar 50a is longer than the width of the base 24 so that the reference bar 50d can be located on the side of the base 24, and the reference bar 50d The upper surface of the is preferably precision processed. And, the gauge pin 54 is mounted to support the center of the face 12 in the center of the horizontal bar (50a), the tip of the gauge pin 54 is formed of a spherical surface 54a, the gauge pin 54 ) Supports the center of the face 12 to provide a measurement reference point.

Referring again to FIGS. 3 and 4, the measurement system 20 has a robot 60 installed on the upper surface of the surface plate 22, and the robot 60 has a vertical rail in a plurality of columns 62. (64) is installed, and the horizontal rail (68) is installed so that the horizontal rail (68) is linearly conveyed by driving the vertical actuator (66) along the vertical rail (64), and the upper surface of the surface plate (22) is disposed at the end of the horizontal rail (68). The legs 70 are vertically connected to support the horizontal rails 68 while being moved along. In addition, the horizontal rail 68 of the robot 60 is installed so that the carrier 80 is linearly transferred by driving the horizontal actuator 72. That is, the carrier 80 of the robot 60 moves along the rectangular coordinates by the horizontal and vertical rails 64 and 68, and the movement range of the carrier 80 by the robot 60 is approximately 1000 mm horizontally and vertically. About 700 mm is preferable. The carrier 80 of the robot 60 is installed such that the wrist 84 is vertically moved by the driving of the cylinder 82, and the wrist 84 is installed so that the hand 86 is pivoted by the driving of the actuator 88. . A first touch sensor 90 is installed on the hand 86 of the robot 60, and the first touch sensor 90 is a probe 92 that detects the panel 10 by contact with a tip thereof. Has The circular second touch sensor 94 is configured to contact the probe 96 so as to contact the mold match line 18 of the panel 10 on one side of the outer circumferential surface of the first touch sensor 90 to measure the mold match outside diagram. It is installed to have.

As shown in FIGS. 11 and 12, the panel 10 whose measurement is completed by the driving of the measuring system 20 is discharged by the driving of the discharging device 100 from the measuring position of the measuring system 20, and the discharging device 100 is equipped with a carrier unit 110 that carries a panel 10. The carrier unit 110 has brackets 114 mounted on both sides of the upper surface of the moving block 112 so as to protrude to the upper surface of the base 24 through the guide holes 26 of the base 24. A plurality of support bars 116 are mounted in parallel with each other. Here, the height of the support bar 116 is mounted lower than the measurement position of the panel 10 so as not to interfere with the face 12 of the panel 10. In addition, the outer circumferential surface of the support bar 116 is covered with a plurality of covers 120 to protect the panel 10, the cover 120 is preferably made of a resin material. The moving block 112 is moved from the measurement position to the discharge position along the rail 140 by the driving of a rodless cylinder 130. In addition, a sensor 150 for detecting a state in which the carrier unit 110 is moved to the discharge position is installed in front of the base 24.

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 stores and outputs the measurement results obtained by the driving of the measurement system 20 in accordance with information on a predetermined order, condition, position, and the like, and stores them in data. 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 It may be operated in conjunction with the transfer device 180 to transfer, and the shape and roughness measuring device 190 to measure the shape and roughness of the panel 10 before and after polishing.

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.

3 to 5 and 7, the panel 10 is centered by the driving of the centering device 170 and then moved to the measurement position of the measuring system 20 by the driving of the transfer device 180. Supplied. Positioner 30 in a state in which the support pin 40, the vacuum pad 48 and the reference gauge 50 of the positioner 30 are raised and lowered by driving the cylinder 32 before the panel 10 is supplied to the measurement position. The panel 10 is supplied to the top of the panel.

When the panel 10 is supplied in this way, the center of the paste 12 is supported by the spherical surface 54a of the gauge pin 54, whereby the lowering of the panel 10 is stopped and the measurement position is determined. Then, the spherical surface 40a of the support pin 40 supports the face 12 three points to stably support the panel 10, and the vacuum pad 48 adsorbs the face 12 to the panel 10. This prevents the flow of, thereby determining the measurement position of the panel 10. On the other hand, when the vacuum pad 48 adsorbs the face 12, the post 44 is moved up and down by the elastic deformation of the spring 46 to absorb the shock, so that the adsorption is made stable.

9A to 9E and 10, after the measurement position of the panel 10 is determined by the positioner 30 of the measurement system 20, the panel 10 is driven by the robot 60. Perform three-dimensional measurements. The robot 60 moves the carrier 80 along the orthogonal coordinates of the longitudinal and transverse rails 64, 68 by the driving of the longitudinal and transverse actuators 66, 72, and at the same time as the movement of the carrier 80, the cylinder The wrist 84 is raised and lowered by the driving of 82 to move the probe 92 of the first touch sensor 90 to a predetermined position, and the measurement is performed. For example, in the case of three-dimensional measurement, if the probe 92 of the first touch sensor 90 is first brought into contact with the reference bar 50d of the reference gauge 50 and then contacted with the inner center of the face 12, the reference The distance from the bar 50d to the center of the inner surface of the face 12 can be measured, and the center thickness of the face 12 can be measured by this measurement. Further, by sequentially contacting the probe 92 to each of the inner and outer surfaces of the skirt 14, the dimensions of the panel 10, the thickness of the seal edge 16, the inner and outer diagrams can be measured.

On the other hand, when measuring items such as pin clearance, pin plane edge roll, etc. of the panel 10, the first touch sensor is prevented from contacting the panel 10 with the second touch sensor 94 driven by the actuator 88. The measurement is performed by turning 90 at a predetermined angle. The mold match outside diagram can be measured by sequentially contacting the probe 96 of the second touch sensor 94 with the mold match line 18 of the panel 10.

As such, since the measurement of the panel 10 is automatically performed by driving the measurement system 20, the continuity and efficiency of the work are improved. In addition, since the center thickness of the face 12 can be measured without taking a sample, the measurement work is simplified, and the measurement work is not only professional and requires much manpower, but also the measurement time can be greatly shortened. 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. 11 and 12, when the measurement of the panel 10 is completed by the driving of the measuring system 20, the measuring device 20 is moved from the measuring position to the discharge position by driving the discharging device 100. Drain the panel 10. The discharging device 100 supports the support bar 116 when the moving block 112 of the carrier unit 110 is moved from the discharging position to the measuring position along the rail 140 by the drive of the rodless cylinder 130. It is located below (10). In this state, the rod 32a is retracted by the driving of the cylinder 32 to return the support pin 40, the vacuum pad 48, and the reference gauge 50 of the positioner 30 to the initial position. In the process of returning the support pin 40 and the vacuum pad 48 to the initial position, the face 12 of the panel 10 is supported by the support bar 116 of the carrier unit 110. At this time, the shortening of the panel 10 is placed along the longitudinal direction of the support bar 116, the cover 120 to protect the panel 10 from impact to prevent scratches and the like. When the panel 10 is placed on the support bar 116 in this way, the moving block 112 of the carrier unit 110 is moved from the measurement position to the discharge position by the drive of the rodless cylinder 130. 110 is moved to the discharge position. This state is detected by the operation of the sensor 150 and the discharge is completed is input to the computer 160.

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 measurement system of the cathode ray tube panel according to the present invention, since the three-dimensional measurement of the panel can be automatically performed under the control of the computer, 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 and the like can 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.

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

Figure 2 is a front view schematically showing the state of use of the measuring system of the cathode ray tube panel 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 perspective view showing a positioner of the measuring system according to the present invention;

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

7 is an operating state diagram of FIG.

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

9a to 9e are front views showing the measurement state by the measurement system according to the present invention,

10 is a perspective view showing a measurement state by the measurement system according to the present invention;

11 is a front view showing the discharge device in the measuring system according to the present invention,

12 is a side view showing a discharge device according to the present invention.

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

10: Panel 20: Measuring system

24: base 30: positioner

32: cylinder 40: support pin

48: vacuum pad 50: reference gauge

54: gauge pin 60: robot

80: carrier 90: first touch sensor

94: second touch sensor 100: discharge device

130: rodless cylinder 140: rail

150: sensor 160: computer

Claims (6)

A base; In order to determine the position of the cathode ray tube panel on the upper surface of the base and to move up and down to provide a measurement position, and a plurality of cylinders installed to have a rod on the lower surface of the base and the rod of the cylinder A positioner having a support pin installed to support a face of the panel, and a vacuum pad mounted to absorb the face of the panel; Gauge pins are provided to enable the lifting and lowering movement by the cylinder of the positioner so as to provide a reference plane of measurement on the upper surface of the base, and to support the center of the face of the panel on the upper surface to provide a measuring support point. A reference gauge mounted; A robot configured to vertically and horizontally rotate the probe of the first touch sensor detecting the panel; A discharge unit configured to be movable along the base to discharge the panel at the measurement position, the carrier unit having a plurality of support bars on which the panel is placed, and a rodless cylinder to move the carrier unit; 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, Connecting rods connected to both sides of each of the rods to protrude upwardly of the base; A moving block mounted at the front end of the connecting rod and having the support pin at the center thereof; A connecting plate connected to one side of the connecting rod; The upper surface of the connecting plate is applied to the elastic force of the spring is installed to enable the up and down movement, the measurement system of the cathode ray tube panel further comprises a plurality of posts that the vacuum pad is mounted. The method of claim 1, wherein the reference gauge has a horizontal bar in which the gauge pin is mounted in the center, vertical bars are formed on both sides of the horizontal bar, respectively, and both edges of the horizontal bar to prevent interference of the probe And a sloped surface is formed, respectively, and a reference bar having a reference surface at the end of the vertical bar is formed horizontally, respectively. The panel for cathode ray tubes according to claim 1, further comprising a circular second touch sensor having a probe on one side of the outer circumferential surface of the first touch sensor so as to be in contact with the mold match line of the panel to measure a mold match outside diagram. Measurement system. The method of claim 1, wherein the discharge device, A rail for guiding the movement of the carrier unit; And a sensor for sensing a state in which the carrier unit is moved 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.