KR20020063723A - Apparatus for fusion-welding stud pin to crt panel - Google Patents

Abstract

PURPOSE: A pin fusing apparatus of a panel of a cathode ray tube is provided to avoid a series of pin fusing processes when a stud pin is not absorbed in a pin chuck. CONSTITUTION: A pine fusing apparatus of a panel of a cathode ray tube comprises a support frame(10), a guide element(13), a pin chuck(17), a heating device(25), a temperature measuring element(33) and a controller. The pin chuck(17) absorbs a stud pin(15). The heating device(25) heats the stud pin(15) absorbed by the pin chuck(17). The temperature measuring element(33) measures the heated temperature of the stud pin(15) heated by the heating device(25). The controller is electrically coupled to the temperature measuring element(33). The controller generates an error signal when the measured temperature from the temperature measuring element(33) exceeds a target temperature by an acceptable range.

Description

Pin welding device for panel for cathode ray tube {APPARATUS FOR FUSION-WELDING STUD PIN TO CRT PANEL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pin fusion apparatus for a cathode ray tube panel, and more particularly, to a pin chuck for adsorbing stud pins, and a fin for a cathode ray tube panel having a heating device for heating the stud pins to fuse the cathode ray tube panel. It relates to a welding device.

Generally, a cathode ray tube has a panel disposed in front of it to project an image, a funnel shaped funnel coupled to the rear of the panel, and a neck having an electron gun coupled to the nose portion of the funnel. Then, the panel and the funnel are formed by heating the raw material of the glass in the melting furnace, and then supplying the molten glass to each forming apparatus and pressurizing it.

Here, the panel has a flat face portion on which the image is projected and a skirt portion bent from each side of the face portion. Phosphors are applied to the inner surface of the face of the panel, and one stud pin is fused to each skirt so that a frame combined with a shadow mask can be mounted on the inner surface of the skirt.

4 is a side view of a fin fusion apparatus of a conventional cathode ray tube panel. As shown in this figure, the conventional pin-fusion apparatus of the cathode ray tube panel, the guide portion 113 is installed so that the linear reciprocating movement by the support frame 110, the transfer portion 112 provided on the support frame 110. ), A pin chuck 117 that sucks the stud pins 115, and a heating device 125 that heats the stud pins 115 that are attracted to the pin chucks 117.

A predetermined axis hole 118 is formed in the pinch 117 along the axial direction. In addition, an air conduit 119 is connected to one side of the axis hole 118 to generate a suction force into the receiving hole so that the stud pin 115 can be adsorbed on the other side, and the air conduit 119 is a vacuum generating a suction force. It is connected to the pump 120. A pin chuck holder 121 for fixing the pin chuck 117 is provided above the guide portion 113, and a pin chuck support block 123 for supporting the pin chuck 117 is provided at an upper end of the pin chuck holder 121.

By this configuration, when the stud pin 115 is placed in front of the pin chuck 117 through a stud pin supply device (not shown), the vacuum pump 120 is operated to suck air, and this suction force is an air conduit ( It is transmitted to the axis hole 118 of the pin chuck 117 through the 119 to allow the stud pin 115 to be adsorbed to one end of the pin chuck 117. Thereafter, the heating device 125 supplied with power from the power supply unit (not shown) induction heats the stud pin 115 adsorbed to the pin chuck 117. As such, when the stud pin 115 is heated to a predetermined temperature, the guide portion 113 is moved to the fusion position of the stud pin 115 toward the inside of the scud portion of the panel 109 by a linear cam (not shown). The stud pin 115 may be melted while being melted on the inner wall surface of the skirt 111.

By the way, in the conventional fin fusion apparatus of the cathode ray tube panel, even if the stud pin is not adsorbed to the pin chuck, a series of pin fusion processes are continuously performed, which may result in mass production of a defective panel. As such, when a defective panel occurs, the inspector goes through a process of checking whether the defective panel is defective or not, but there is a problem that the defective panel may be regarded as a good product and transferred to a later process due to the inelegance of the worker.

Accordingly, an object of the present invention is to provide a pin welding device for a cathode ray tube panel which can prevent a series of pin welding processes from being performed without a stud pin being adsorbed to the pin chuck.

1 is a side view of the pin fusion apparatus of the cathode ray tube panel according to the present invention,

2 is an enlarged perspective view of the heating apparatus of FIG. 1;

3 is a control block diagram according to the present invention;

4 is a side view of a fin fusion apparatus of a conventional cathode ray tube panel.

* Explanation of symbols for the main parts of the drawings

9 panel 15 stud pin

17: pin chuck 25: heating device

33: temperature measuring member 35: control unit

40: heating time measuring unit

In the pin fusion apparatus of the cathode ray tube panel provided with the pin chuck which adsorb | sucks a stud pin, and the heating apparatus which heats the said stud pin and fuses it to the panel for cathode ray tubes according to this invention, it is provided in the said pin chuck, The said heating is provided. A temperature measuring member for measuring a heating temperature of the stud pin heated by the apparatus; And a control unit for generating an error signal when the measured temperature value from the temperature measuring member is out of a predetermined allowable range from a target temperature value.

Here, the pin chuck has a predetermined axis hole therein along the longitudinal direction, it is advantageous that the temperature measuring member is disposed in the axis hole. It is preferable to further include a display means for displaying the signal by the controller to the outside, it may be provided as a display unit, an alarm generator or the like.

On the other hand, it further comprises a heating time measuring unit for measuring the time until the stud pin is heated to the target temperature value, the control unit when the heating time measured by the heating time measuring unit is out of a predetermined reference time You can also generate an error signal.

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

Pin fusion apparatus of the cathode ray tube panel according to the present invention, as shown in Figure 1, the guide portion is installed so that the linear reciprocating motion by the support frame 10, the transfer portion 12 provided on the support frame 10 (13), the pin chuck 17 which adsorbs the stud pin 15, and the heater 25 which heats the stud pin 15 adsorb | sucked by the pin chuck 17 are provided.

The pin chuck 17 is formed of a ceramic material, and an axis hole 18 is formed inside the pin chuck 17 so as to suck the stud pin 15 of a metal material. In the axis hole 18, a temperature measuring member 33 for measuring the heating temperature of the stud pin 15 heated by the heating device 25 to be described later is provided, and the temperature measuring member 33 is a predetermined control unit. It is electrically connected to (35).

An air conduit 19 is connected between the axis hole 18 and the vacuum pump 20. Accordingly, when the suction force of the vacuum pump 20 is operated, the stud pin 15 may be adsorbed to the distal end of the pin chuck 17 through the air conduit 19. In addition, the pin chuck holder 21 fixing the pin chuck 17 is erected on the upper side of the guide portion 13 so that the pin chuck 17 can be linearly reciprocated integrally with the guide portion 13. A pin chuck support block 23 is provided above 21.

As shown in FIG. 2, the heating device 25 has a heat generating housing 27 having a coil therein and a conductive portion 30 extending upward from the heat generating housing 27 and adjacent to the pin chuck 17. The heat generating housing 27 has a rectangular cylinder shape, and an induction coil for forming an electromagnetic field in response to the supply of power is arranged in a ring in the heat generating housing 27.

The conductive portion 30 extends upwardly from one end of the heat generating housing 27 to contact the pin chuck 17, and is sucked to the pin chuck 17 by transferring an induced current from the heat generating housing 27 to the pin chuck 17. The stud pin 15 generates heat by alternating magnetic flux. The through-hole 31 formed larger than the maximum diameter of the stud pin 15 is formed in the plate surface of the one end part of the conductive part 30 which contacts the pin chuck 17. On the other hand, the heat generating housing 27 and the conductive portion 30 is formed of different materials is very advantageous to increase the efficiency of the electron induction action. That is, it is also suitable for the boundary condition of the so-called magnetic field. Therefore, in order to minimize the loss of induced electromotive force, for example, the heat generating housing 27 may be formed of bronze and the conductive portion 30 may be formed of a pure copper material.

On the other hand, as shown in FIG. 3, the control unit 35 generates an error signal when the measured temperature value from the temperature measuring member 33 is out of a predetermined allowable range from a predetermined target temperature value. Therefore, the control part 35 includes both the memory part which memorize | stores a reference value initially, and the comparison part which compares a reference value and the measured result value within a predetermined | prescribed tolerance range. Here, the allowable range of the reference value generally indicates approximately ± 0.05% at a temperature at which the heating device 25 heats the stud pin 15 adsorbed to the pin chuck 17.

In addition, the form which produces the error signal in the control part 35 uses the alarm generator 38 which mainly produces an audio signal by a sound sound. However, in some cases, not only the display unit 39 which generates a visual signal by using a flashing light can be replaced, but also when the error signal is generated, it can be used to stop the operation of the pin welding device. do.

By this configuration, when the panel 9 is disposed at a predetermined position of the pin welding apparatus and the stud pin 15 is supplied in front of the pin chuck 17, the suction force is generated in the vacuum pump 20 and the suction force is air. The stud pin 15 can be adsorbed to the pin chuck 17 by being transferred to the axis hole 18 inside the pin chuck 17 through the conduit 19. When the stud pin 15 is adsorbed on the pin chuck 17, the heating device 25 according to the present invention is operated to heat the stud pin 15. The operation process is as follows.

First, when power is supplied to the heating device 25 by a power supply unit (not shown), an electromagnetic field is generated in an induction coil arranged in a ring in the heat generating housing 27, and after that, the electromagnetic field is generated in the heat generating housing 27. It is transferred to the conductive portion 30 disposed up to the pin chuck 17 through. As such, when an electromagnetic field is generated in the conductive part 30, alternating magnetic flux is generated in the metal stud pin 15 adsorbed to the pin chuck 17.

In more detail, when all conductive materials are put into a phase change magnetic field, an eddy current (EDDY CURRENT) is generated. That is, when alternating magnetic flux is generated in the conductor, an induced electromotive force is generated in the conductor, and an eddy current is generated by the induced electromotive force. At this time, when an eddy current flows in a conductor having an arbitrary resistance, heat is generated in the conductor. That is, the eddy current loss (EDDY CURRENT LOSS) is generated.

As such, when the alternating magnetic flux is generated on the stud pin 15, the stud pin 15 generates heat due to induced electromotive force, that is, an eddy current loss (EDDY CURRENT LOSS) is generated and the stud pin 15 is heated. . At this time, the temperature measuring member 33 measures the temperature of the stud pin 15 heated by the heating device 25 and transmits it to the control unit 35. The control part 35 determines that the stud pin 15 was correctly adsorb | sucked to the pin chuck 17, when the measured value from the temperature measuring member 33 is accommodated in a predetermined tolerance range. Then, the guide part 13 moves to the fusion position of the stud pin 15 toward the inner wall of the skirt part 11 of the panel 9 by the linear cam which is not shown in conjunction with this. Accordingly, the heated stud pin 15 can be fused while melting the inner wall surface of the skirt portion 11.

On the other hand, when the measured value by the temperature measuring member 33 is out of a predetermined allowable range, the control part 35 operates the alarm generator 38 or the display part 39 based on this signal, and receives an error signal. By transmitting to the outside, the defective panel is detected. Thus, what is regarded as a defective panel by the measurement result value of the temperature measuring member 33 is discarded so that it can no longer be transferred to the post process.

Meanwhile, in addition to the temperature measuring member 33, a heating time measuring unit 40 is further provided to measure a time for heating the stud pin 15 to a predetermined target temperature, and then the heating time measuring unit 40 is controlled by the control unit 35. If the heating time measured by) is outside the predetermined reference time can be configured to generate an error signal, more effectively the error in the control unit 35 by measuring both the time and temperature of the stud pin 15 is heated It is most effective to let the signal be judged.

As described above, in the present invention, the stud pin is provided on the pin chuck 17 by providing the controller 35 which generates an error signal when the measured temperature value from the temperature measuring member 33 is outside the predetermined allowable range from the target temperature value. It is possible to prevent the series of pin fusion processes from being carried out without (15) being adsorbed.

As described above, according to the present invention, there is provided a pin welding device for a cathode ray tube panel which can prevent a series of pin welding processes from being performed without a stud pin being adsorbed to the pin chuck.

Claims (6)

In the pin fusion apparatus of the cathode ray tube panel having a pin chuck for adsorbing stud pins and a heating device for heating the stud pins and fusion to the cathode ray tube panel, A temperature measuring member provided on the pin chuck to measure a heating temperature of the stud pin heated by the heating apparatus; And a control unit for generating an error signal when the measured temperature value from the temperature measuring member is out of a predetermined allowable range from a target temperature value. The method of claim 1, The pin chuck has a predetermined axis hole therein along the longitudinal direction, The temperature measuring member is a pin welding device of the cathode ray tube panel, characterized in that disposed in the axis hole. The method of claim 1, Pin fusion apparatus of the cathode ray tube panel further comprises a display means for displaying the signal by the control unit to the outside. The method of claim 3, The display means is a pin welding device of the cathode ray tube panel, characterized in that the display unit. The method of claim 3, The display means is a pin welding device of the cathode ray tube panel, characterized in that the alarm generator. The method according to any one of claims 1 to 5, Further comprising a heating time measuring unit for measuring the time until the stud pin is heated to the target temperature value, And the control unit generates an error signal when the heating time measured by the heating time measuring unit is out of a predetermined reference time.