JP2004079261A - Manufacturing method and device for color selecting electrode for color cathode tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing device for a color selecting electrode for a color cathode tube capable of welding a work for electrode even to a frame member having a low rigidity stably with a high accuracy, easy for maintenance and low in cost. <P>SOLUTION: The manufacturing device for the color selecting electrode for the color cathode tube includes a first controlling means to run parallel a first and a second welding electrode means 6 along welding passes 7 stretching in the first direction (X-direction) and a second controlling means to control the respective angles formed on the welding plane between the two welding electrode means and the first direction in accordance with the running positions of the two electrode means, wherein the second controlling means includes a driving means 13 to drive the first member 15 linearly and an angle changing means to rotate the second member 18 in +θ deg. in compliance with the displacement x of the first member and rotate a third member 19 in -θ deg. The first electrode means is coupled with the second member while the second electrode means is coupled with the third member. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and an apparatus for manufacturing a color selection electrode for a color cathode ray tube.
[0002]
[Prior art]
FIG. 5 shows an example of the configuration of the color selection electrode of the color cathode ray tube. In the figure, a color selection electrode 3 is formed by forming a color selection electrode element 4 made of a thin metal plate on which a number of slits 4a (FIG. 6) or holes 4b (FIG. 7) are formed into a frame 5 formed in a substantially rectangular frame shape. Are given a predetermined tension and fixed by welding. The color selection electrode element 4 is welded to a surface of the frame member 5a having a curvature in the longitudinal direction. The one having the slits 4a in the color selection electrode element body 4 is called an aperture grill system, and the one having the holes 4b is called a shadow mask system. In order to prevent the deterioration of the image quality of the color cathode ray tube and the disturbance of the image, in both the aperture grill system and the shadow mask system, the color selection electrode element 4 is distorted with respect to the pair of opposite frame members 5a of the frame 5. It is necessary to fix the electrodes by welding so that no color is generated, and to apply an appropriate tension to the color selection electrode body 4.
[0003]
The tension is applied to the color selection electrode body 4 by the following method. A plurality of load points are set on the side surfaces of a pair of opposed frame members 5a of the frame 5 formed in a substantially rectangular frame shape, and a force in a direction approaching the frame member 5a is obtained by applying a force to each of the load points. In addition, the frame 5 is bent and held by a predetermined amount. Above the frame 5, the color selection electrode body 4 is placed at a predetermined position with respect to the frame 5, and is pulled and held in two or four directions. In this state, the frame 5 is raised or the color selection electrode element 4 is lowered to press the color selection electrode element 4 against the frame member 5a. At this time, the end face of the color selection electrode element body 4 substantially coincides with the end face of the frame member 5a.
[0004]
Thereafter, the press contact portion between the color selection electrode element body 4 and the frame member 5a is welded by seam welding, laser welding, or the like. Finally, when the force applied to the frame 5 is released, a tension is applied to the color selection electrode element body 4 by the restoring force of the frame 5 to the original state. By setting various forces to be applied to the above-mentioned plurality of load points, a desired tension distribution shape can be applied to the color selection electrode element 4.
[0005]
The welding of the color selection electrode element body 4 to the pair of opposed frame members 5a will be described with reference to FIG. 8 taking seam welding as an example. In FIG. 8, reference numeral 6 denotes a roller electrode, and reference numeral 7 denotes a welding trajectory followed by the roller electrode. The color selection electrode body 4 is pressed against the frame member 5a, and the end surface of the color selection electrode body 4 is held in a state of being aligned with the end surface of the frame member 5a. The roller electrode 6 travels in the positive X-axis direction in the figure along the pressing portion by an electrode driving unit (not shown). By intermittently energizing one roller electrode 6 to the other roller electrode 6 during traveling, the color selection electrode element body 4 can be welded to the press contact surface with the frame member 5a.
[0006]
Since the roller electrode 6 is thin, if the pressing surface between the color selection electrode element body 4 and the frame member 5a is not sufficiently wide, the trajectory of the roller electrode 6 must be accurately adjusted to the shape of the frame member in order to prevent the roller electrode 6 from falling off. It needs to be controlled to match. However, when a plurality of load points are set on the frame member 5a, as the number of load points increases, the deformed shape becomes complicated, and it cannot be regarded as a curve having a single straight line or a single radius. Therefore, when there are many load points, there has been a problem that it is difficult to accurately match the trajectory of the welding electrode with the deformed shape of the frame member 5a.
[0007]
In recent years, a frame as shown in FIG. 9 has been proposed for the purpose of reducing manufacturing cost and weight. In this frame, the frame member 5a has a hollow structure processed by sheet metal bending or the like instead of a solid structure processed by conventional drawing or the like. However, the problem is expected to be even greater in such frames. Because the rigidity of the hollow frame member is low, the deformation when a load is applied becomes local, and when the number of load points is large, the deformed shape becomes very complicated. This is because, in the frame member 5a having low rigidity, the curvature, the position of the inflection point, and the like greatly change only by slightly changing the load condition.
[0008]
Japanese Patent Application Laid-Open No. 2001-126612 discloses an apparatus for manufacturing a color selection electrode capable of solving such a problem. FIGS. 10 and 11 show the main configuration of this manufacturing apparatus. In these figures, 6 is a roller electrode, 9 is a measuring device for measuring the shape of a frame member to determine a welding trajectory, and 10 is a rotation direction (the rotation axis of the roller electrode 6) on the XY plane in the XYZ coordinate system in the figure. Is an X-axis drive mechanism, and 11 is a Y-direction drive mechanism. The roller electrode 6, the measuring device 9, the rotation direction (angle θ) drive mechanism 10, and the Y-direction drive mechanism 11 are fixed to columns 12 movable along the longitudinal direction of the frame member 5a.
[0009]
Next, the operation of this device will be described. In FIG. 10, a pair of measuring devices 9 constituted by an optical position indirect measuring means such as a laser displacement meter moves in the X-axis positive direction together with the support 12. By moving a pair of measuring devices 9 along a predetermined path outside each frame member 5a, the measuring device 9 irradiates a laser beam to the side surface of the frame member 5a during the movement, and receives reflected light thereof. Thus, data on the deformed shape of the frame member 5a can be obtained.
[0010]
FIG. 12 shows a cross section of the measuring instrument 9 viewed from the X-axis direction. The measuring device 9 sends the measurement data to a control unit (not shown). Thus, a welding track 7 similar to the deformed shape of the frame member 5a can be obtained prior to welding. Next, the welding process will be described. After setting the color selection electrode body 4 on the frame member 5a, they are pressed against each other. Thereafter, the roller electrode 6 is slid down to the lower portion of the column 12, and the pair of columns 12 is moved in the X-axis positive direction as shown by the arrow in FIG. As a result, the roller electrode 6 runs on the welding surface, and the color selection electrode body 4 is welded to the frame member 5a. At this time, the position of the pair of roller electrodes 6 in the Y-axis direction and the angle θ on the XY plane are independently linked to the position of the roller electrodes 6 in the X-axis direction based on the data of the welding trajectory obtained earlier. Controlled.
[0011]
[Problems to be solved by the invention]
As described above, by using the manufacturing apparatus described in Japanese Patent Application Laid-Open No. 2001-126612, the color selection electrode element body can be welded to a frame having low rigidity with high accuracy. However, this manufacturing apparatus is composed of a servomotor and the like in order to independently control a total of five axes of X, Y1, Y2, θ1, θ2 (one axis in the X direction, two axes in the Y direction, two axes in the θ direction). It is necessary to provide an expensive five-axis simultaneous control device, and furthermore, sophisticated and complicated, and therefore, expensive software (control program) is also required. In addition, if a failure or the like occurs during welding, the recovery can only be performed by an engineer with advanced knowledge, and it takes a long time to recover.
[0012]
In the case of the hollow frame shown in FIG. 9, the applied load causes the frame member 5a to fall as shown in FIG. 13, whereby the welding surface 5b of the frame member 5a is inclined with respect to the Y axis. appear. Usually, in order to prevent poor welding of the color selection electrode element body 4 and to stabilize the tension distribution, the electrode roller 6 is inclined so that the electrode roller 6 as a welding means contacts the welding surface 5b at a predetermined angle α. However, when the welding surface 5b of the frame member 5a is inclined, it is necessary to adjust the inclination of the electrode roller. In the conventional manufacturing apparatus described above, in order to adjust the inclination of the electrode roller, it is necessary to change not only the mechanism but also the control parameters and the like, and there is a problem that it takes a long time to adjust because there are many adjustment locations.
[0013]
The present invention has been made in view of the above-mentioned problems, and has a low rigidity, for example, a highly accurate and stable welding of an electrode element body to a frame member having a hollow structure, and an easy-to-maintain color selection electrode. An object is to provide a manufacturing apparatus at low cost. Another object of the present invention is to make it possible to easily adjust a contact angle of a welding means such as an electrode roller with respect to a welding surface of a frame member in such a device for manufacturing a color selection electrode.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is characterized in that the upper surface and the lower surface of the frame formed in the shape of a substantially rectangular frame are welded to the upper end of the color selection electrode body made of a thin metal plate. In the method of manufacturing a color selection electrode for a color cathode ray tube by welding the lower end and each,
Controlling the first and second welding electrode means to run in parallel along respective welding trajectories extending in the first direction;
By linearly driving a first member engaged with a second member connected to the first welding electrode means and a third member connected to the second welding electrode means, Rotating the second member by an angle + θ in accordance with the displacement x of the first member, and rotating the third member by an angle -θ,
An angle formed by the first and second welding electrode means on the welding surface with the first direction is controlled in accordance with a traveling position of the first and second welding electrode means.
[0015]
In order to achieve the above object, the invention according to claim 2 is characterized in that the upper surface and the lower surface of the frame formed in the shape of a substantially rectangular frame are provided with the upper end of the color selection electrode element made of a thin metal plate. In a device for manufacturing a color selection electrode for a color cathode ray tube by welding the lower end and each,
First control means for causing the first and second welding electrode means to run in parallel along respective welding trajectories extending in the first direction;
Second control means for controlling an angle formed by the first and second welding electrode means on the welding surface with the first direction in accordance with a traveling position of the first and second welding electrode means, Has,
The second control unit includes a driving unit that linearly drives the first member, and a second member that is rotated by an angle + θ in accordance with a displacement x of the first member, and a third member that is rotated by an angle −θ. angle conversion means for rotating θ,
The first welding electrode means is connected to the second member, and the second welding electrode means is connected to the third member.
[0016]
The invention according to claim 3 is the invention according to claim 2, wherein the first and second members are moved in the first direction in accordance with the traveling positions of the first and second welding electrode means. A third control means for moving in a second vertical direction is provided.
[0017]
According to a fourth aspect of the present invention, in order to achieve the above-mentioned other object, in the second aspect of the present invention, the first and second welding electrode means and a welding surface are provided with the welding surface and the welding surface. The angle conversion means is rotatably connected to the first and second members, respectively, so that an angle formed on a plane perpendicular to the first direction can be adjusted.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 4, the same or corresponding elements as those shown in FIGS. 5 to 13 are denoted by the same reference numerals.
[0019]
Embodiment 1 FIG.
The apparatus for manufacturing a color selection electrode for a color cathode-ray tube according to the first embodiment has a configuration similar to that of the conventional manufacturing apparatus shown in FIGS. 10 and 11, but includes a pair of rotation direction (angle θ) driving mechanisms 10. Instead, a θ-axis control mechanism shown in FIG. 1 is provided.
[0020]
In FIG. 1, reference numeral 13 denotes a motor (for example, a servo motor), 14 denotes a ball screw for feeding a slider connected to the output shaft of the motor 13, and 15 denotes a slider that converts the rotational motion of the motor 13 into a linear motion. Reference numeral 17 denotes a lever which has one end pivotally supported by a fulcrum shaft 16 implanted in the slider 15 and constitutes the angle conversion mechanism 1 for converting a linear motion of the slider 15 into a rotary motion. Reference numeral 18 denotes a θ1-axis mechanism that is rotatably attached to a Y1-axis slider 27 described later and engages with a clearance hole 20 formed at the other end of the lever 17 so as to be driven to rotate by the angle conversion mechanism 1. Reference numeral 2 denotes the other angle conversion mechanism that forms a pair with the angle conversion mechanism 1, and 19 denotes a θ2-axis mechanism that is rotationally driven by the angle conversion mechanism 2.
[0021]
Reference numeral 41 denotes a Y1-axis control mechanism including a Y1-axis drive motor 25, a Y1-axis ball screw 26, and a Y1-axis slider 27, and drives the θ1-axis mechanism 18 in the Y direction. Reference numeral 42 denotes the other Y2-axis control mechanism that forms a pair with the Y1-axis control mechanism 41. The Y2-axis control mechanism 42 includes a Y2-axis drive motor 28, a Y2-axis ball screw 29, and a Y2-axis slider 30, and drives the θ2-axis mechanism 19 rotatably attached to the Y2-axis slider 30 in the Y direction. Since the structure on the θ1 axis side and the structure on the θ2 axis side are bilaterally symmetrical, in FIG. 1, reference numerals are assigned to only one side (θ1 axis side), and the other (θ2 axis side) is omitted, unless otherwise required. .
[0022]
Since the θ-axis control mechanism shown in FIG. 1 has a symmetrical structure, the details of the operation will be described below taking the θ1-axis side as an example. When the slider feed ball screw 14 is rotated by the motor 13, the slider 15 moves in the X direction, and the lever fulcrum shaft 16 implanted in the slider 15 also moves in the X direction. As a result, the lever 17 makes a rotational movement about the θ1-axis mechanism 18. At this time, the distance L2 between the center 21 of the lever fulcrum shaft 16 and the center 22 of the θ1 axis mechanism changes by a value corresponding to the rotation angle θ of the lever 17, but the escape hole 20 in the Y direction is formed. Therefore, the change in the distance L2 can be absorbed.
[0023]
Also, when the Y1 axis ball screw 26 is rotated by the Y1 axis drive motor 25 of the Y1 axis control mechanism 41 and the Y1 axis slider 27 moves y1 in the Y direction, the θ1 axis mechanism 18 is displaced y1 in the Y direction. Can also be absorbed by the escape hole 20 extending in the Y direction.
[0024]
The displacement x of the slider 15 required to rotate the θ1-axis rotation mechanism 18 by the angle θ can be calculated from the following equation.
x = L1 · tan θ
Here, L1 is the distance in the Y direction between the center 21 of the lever fulcrum shaft 16 and the center 22 of the θ1-axis mechanism 18.
[0025]
The control on the θ2 axis side is the same as the control on the θ1 axis side. When welding the color selection electrode body to the frame, the Y1-axis control mechanism and the Y2-axis control mechanism 42 execute control operations independently of each other. Although the frame is substantially symmetrical (substantially symmetrical with respect to the X axis), there are some asymmetric components depending on the load conditions on the frame members and the like. Therefore, depending on the situation, the distance L3 in the Y direction between the center 23 of the lever fulcrum axis on the θ2-axis side and the center 24 of the θ2-axis mechanism 19, and the center 21 of the lever fulcrum axis and the center 22 of the θ1-axis mechanism 18 on the θ1-axis side A slight difference L4 = | L1−L3 | occurs between the distance L1 in the Y direction and the distance L1 in the Y direction, but since the pair of frame members are substantially symmetrical, this L4 is extremely much smaller than L1 and L3. The effect of L4 on θ is negligible.
[0026]
The conventional color selection electrode manufacturing apparatus controls the rotation of the θ1 axis mechanism and the rotation of the θ2 axis mechanism in response to the individual movements of the Y1 axis and the Y2 axis, and therefore requires a drive unit for each of the θ1 axis and the θ2 axis. Structure. That is, conventionally, the θ-axis control mechanism had to be provided with two drive units including the servomotor. However, according to the first embodiment, the θ-axis control mechanism can be constituted by one drive unit. . Therefore, the device becomes inexpensive and maintenance becomes easy.
[0027]
FIG. 3 shows an example of the first embodiment. In FIG. 3, reference numeral 6 denotes a seam electrode roller serving as a welding means, 8 denotes an air cylinder for lifting and lowering the electrode roller, 31 denotes a spline shaft, 32 denotes a housing, 33 denotes a bearing for rotatably holding the housing 32, and 34 denotes an electrode base. , 15 is a slider, 16 is a lever fulcrum, 17 is a lever, 36 is a linear bush, 14 is a ball screw for feeding the slider, and 38 is a bearing for holding the lever fulcrum 16 in a freely rotatable manner.
[0028]
In this embodiment, the lever 17 is rod-shaped, and does not have the escape hole 20 and the θ1-axis mechanism 18. However, the housing 32 is connected to the lever 17 via the linear bush 36 so as to perform the same function as these, and the electrode base is formed. 34 is connected to the housing 17 via a bearing 33. Incidentally, a Y1-axis control mechanism (not shown) drives the electrode base 34 in the Y direction.
[0029]
In the present embodiment, the θ-axis control mechanism simultaneously controls the θ1 axis and the θ2 axis. However, since the mechanism is bilaterally symmetric, only one side (θ1 axis side) is shown in FIG. 3 and the other side (θ2 axis side). Is not shown. According to the embodiment as shown in FIG. 3, a mechanism for simultaneously controlling the θ1 axis and the θ2 axis by one drive unit is realized as described above.
[0030]
Embodiment 2 FIG.
A device in which the configuration of the θ-axis control mechanism of the above embodiment is partially changed so that the contact angle of the electrode roller to the welding surface can be adjusted will be described below as a second embodiment. FIG. 4 shows the configuration of the θ-axis control mechanism of the device according to the second embodiment. As shown in the drawing, this embodiment is different from the embodiment shown in FIG. 3 in that the lever 17 is connected to the lever fulcrum shaft 16 by a connecting pin 35, and the linear bush 36 and the housing 32 are connected via a bearing 37. Configuration.
[0031]
Next, a case where the electrode roller 6 is inclined at a predetermined angle α when the electrode roller 6 is brought into contact with the welding surface 3c of the frame member 5a will be described by taking seam welding as an example. In this embodiment, the electrode roller 34, the electrode roller lifting air cylinder 8, the spline shaft 31, the housing 32, and the bearing 33 for rotatably holding the housing 32 are mounted on the electrode base 34. The electrode roller 6 can be inclined by the angle α by tilting the mounting angle of the electrode roller 6 by the predetermined angle α.
[0032]
In FIG. 4, when the electrode base 34 is inclined at an angle α from the vertical direction (Z-axis direction), a twist occurs in the connection portion between the lever 17 and the housing 32. However, since the bearing 37 is provided, the twist is absorbed. .
[0033]
If the center of rotation 39 when the electrode base 34 is tilted does not coincide with the center 40 of the connecting portion between the housing 32 and the lever 17, the height of the center 40 changes by z1 by tilting the angle α. When the lever 17 is tilted from the horizontal position by z1, when the Y-axis driving mechanism (not shown) drives the electrode base 34 in the Y-axis direction, the lever 17 and the linear bush 36 do not move. In the present embodiment, the lever 17 and the lever fulcrum shaft 16 are rotatably connected by a connecting pin 35 so that the lever 17 can rotate around an axis extending in the X direction. Therefore, when the electrode base 34 is driven in the Y direction in a state where the lever 17 is tilted from the horizontal, the lever 17 rotates about the connecting pin 35, so that no twisting occurs.
[0034]
In the second embodiment, as in the first embodiment, since two axes θ1 and θ2 can be simultaneously controlled by one drive unit, there is an advantage that a commercially available four-axis simultaneous control unit can realize an apparatus for manufacturing a color selection electrode. In addition, in such a manufacturing apparatus, there is an advantage that the contact angle of the roller electrode 6 with respect to the welding surface 5b of the roller electrode 6 and the frame member can be arbitrarily changed. In the present embodiment, seam welding has been described as an example. However, in the case where a non-contact type welding means such as a laser welding method is used, similarly, the setting of the contact angle of the welding means with respect to the welding surface 5b is arbitrarily changed. Is possible.
[0035]
In each of the above-described embodiments, the shape of the frame is measured in advance by measuring means 9 such as a laser displacement meter, and the following is performed in order to make the trajectory of the seam electrode roller 6 coincide with the welding trajectory 7 obtained thereby. Control. That is, a Y-axis control mechanism (Y1-axis control mechanism, Y2-axis control mechanism), a θ-axis control mechanism (θ1, θ2), and a seam electrode unit are incorporated in the slider-feeding ball screw 14 traveling in the frame X-axis direction. By the control operation of the Y1, Y2 axis control mechanism and the θ (θ1, θ2) control mechanism, the X-axis traveling system is fed at a predetermined speed while the electrode rollers are moved along the welding track 7 corresponding to the shape of the frame. Thereby, the color selection electrode body 4 can be seam-welded to the frame member 5a.
[0036]
【The invention's effect】
According to the first, second and third aspects of the present invention, the color selection electrode body can be stably welded to a frame member having a low rigidity, for example, a frame member having a hollow structure with high accuracy and maintenance. It is possible to provide an easy color selection electrode manufacturing apparatus at low cost.
[0037]
According to the invention set forth in claim 4, in addition to the effects of the inventions set forth in claims 1 to 3, the contact angle of the welding means such as an electrode roller with respect to the welding surface of the frame member can be easily adjusted. .
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a main part of a θ-axis control mechanism provided in a manufacturing apparatus of a color selection electrode for a color cathode-ray tube according to a first embodiment of the present invention.
FIG. 2 is a diagram illustrating a method of obtaining a slider displacement amount x required to rotate a θ1-axis rotation mechanism by an angle θ in the apparatus according to the first embodiment.
FIG. 3 is a diagram illustrating a structure of an example of a θ-axis control mechanism of the manufacturing apparatus according to the first embodiment.
FIG. 4 is a diagram showing a structure of a θ-axis control mechanism provided in the apparatus for manufacturing a color selection electrode for a color cathode-ray tube according to Embodiment 2 of the present invention.
FIG. 5 is a diagram illustrating a configuration example of a color selection electrode.
FIG. 6 is a diagram showing a color selection electrode body (aperture grill system).
FIG. 7 is a diagram showing a color selection electrode element body (shadow mask method).
FIG. 8 is a diagram for explaining seam welding between the color selection electrode body and the frame.
FIG. 9 is a perspective view of a frame having a hollow structure.
FIG. 10 is a diagram showing a configuration of a conventional apparatus for manufacturing a color selection electrode for a color cathode ray tube.
FIG. 11 is a diagram illustrating a welding operation of a conventional apparatus for manufacturing a color selection electrode for a color cathode-ray tube.
12 is a view of the measuring device of the manufacturing apparatus of FIG. 10 as viewed along a side surface of a frame.
FIG. 13 is a diagram illustrating that a frame member falls down due to a load.
[Explanation of symbols]
1 Angle conversion mechanism (θ1 axis side), 2 Angle conversion mechanism (θ2 axis side), 3 color selection electrode, 4 color selection electrode body, 4a slit, 4b hole, 5 frame, 5a frame member, 5b welding surface, 6 Roller electrode, 7 welding track, 8 electrode roller lifting cylinder, 9 measuring device, 10 rotation (θ) direction driving mechanism, 11 Y direction driving mechanism, 12 columns, 13 motor, 14 ball screw for slider feed, 15 slider, 16 lever fulcrum Shaft, 17 lever, 18 θ1 axis mechanism, 19θ2 axis mechanism, 20 Y direction escape hole, 21 Center of lever drive shaft (θ1 axis side), 22 Center of θ1 axis, 23 Center of lever drive shaft (θ2 axis side) 24 Y2 axis center, 25 Y1 axis drive motor, 26 Y1 axis ball screw, 27 Y1 axis slider, 28 Y2 axis drive motor, 29 Y2 axis Ball screw, 30 Y2 axis slider, 31 spline shaft, 32 housing, 33 bearing, 34 electrode base, 35 connecting pin, 36 linear bush, 37 bearing, 38 bearing, 39 center of rotation of electrode base, 40 center of connection between lever and housing, 41 Y1 axis control mechanism, 42 Y2 axis control mechanism.

Claims (4)

A color selection electrode for a color cathode ray tube is welded by welding the upper and lower ends of a color selection electrode element body made of a thin metal plate to opposite upper and lower sides of a frame formed into a substantially square frame shape, respectively. In the manufacturing method,
Controlling the first and second welding electrode means to run in parallel along respective welding trajectories extending in the first direction;
By linearly driving a first member engaged with a second member connected to the first welding electrode means and a third member connected to the second welding electrode means, Rotating the second member by an angle + θ in accordance with the displacement x of the first member, and rotating the third member by an angle -θ,
A collar, wherein the angle formed by the first and second welding electrode means on the welding surface with the first direction is controlled according to the running position of the first and second welding electrode means. A method for producing a color selection electrode for a cathode ray tube. A color selection electrode for a color cathode ray tube is welded by welding the upper and lower ends of a color selection electrode element body made of a thin metal plate to opposite upper and lower sides of a frame formed into a substantially square frame shape, respectively. In the manufacturing equipment,
First control means for causing the first and second welding electrode means to run in parallel along respective welding trajectories extending in the first direction;
Second control means for controlling an angle formed by the first and second welding electrode means on the welding surface with the first direction in accordance with a traveling position of the first and second welding electrode means, Has,
The second control unit includes a driving unit that linearly drives the first member, and a second member that is rotated by an angle + θ in accordance with a displacement x of the first member, and a third member that is rotated by an angle −θ. angle conversion means for rotating θ,
An apparatus for manufacturing a color selection electrode for a color cathode-ray tube, wherein the first welding electrode means is connected to the second member, and the second welding electrode means is connected to the third member. A third control unit that moves the first and second members in a second direction perpendicular to the first direction in accordance with a traveling position of the first and second welding electrode units. 3. The apparatus for producing a color selection electrode for a color cathode ray tube according to claim 2, wherein: The angle conversion means is configured to adjust the angle formed between the first and second welding electrode means and the welding surface on a plane perpendicular to the welding surface and the first direction. The apparatus for manufacturing a color selection electrode for a color cathode-ray tube according to claim 2 or 3, wherein the members are rotatably connected to the respective members.

Images