JP3500688B2 - Plate welding method and plate welding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate welding method, and more particularly to a bottom surface of a pair of side members (vertical portions) of a frame to which an aperture grill used as a color selecting means in a Trinitron (trademark) type color cathode ray tube is welded. TECHNICAL FIELD The present invention relates to a plate welding method for welding a plate [STC (Self Thermal Compensator) plate] to a plate and a plate welding machine used for the execution.

[0002]

2. Description of the Related Art A Trinitron tube uses an aperture grill as a color selection electrode, and the aperture grill is subjected to several heat treatments in a state of being attached to a frame. Examples of the type of heat treatment include blackening treatment and frit seal. The aperture grill must be pulled more strongly by the frame so that the grill tape does not vibrate easily due to vibration or noise, but if the aperture grill is subjected to pulling force even when subjected to such heat treatment, the grill tape However, there is a problem of deformation, deterioration and deterioration.

Therefore, in order to prevent a tensile force from being applied to the aperture grill when it is subjected to heat treatment, left and right side members (hereinafter referred to as "B") connecting upper and lower members (hereinafter referred to as "A members") of the frame. A plate made of, for example, stainless steel (hereinafter referred to as "STC plate") having a larger thermal expansion coefficient than this member is welded to the "member".) So that the interval between the upper and lower members (A members) is narrowed during the heat treatment due to the bimetal effect. ing. By the way, conventionally, the welding of the STC plate to the STC plate welding method has been performed manually.

[0004]

Since the STC plate is welded to the B member by hand, it takes a long time for welding, and the operator is required to have a very high skill.
There is a problem in that it is difficult to position the STC plate, and the strength of the bimetal effect tends to vary. In particular, if the positional relationship of the STC plate with respect to the B member in the width direction (that is, the X direction, in other words, the horizontal scanning direction) is incorrect, the bimetal effect is strongly affected.

The present invention has been made in order to solve such problems, and an object thereof is to save labor of STC plate welding, improve efficiency, and stabilize quality.

According to the plate welding method of the first aspect, the pair of plates are simultaneously conveyed to the welding portion, and the frame is supplied to the welding portion so that the pair of side members are placed on the pair of plates. The positioning of each plate in the Y direction and the positioning of the frame in the X and Y directions are performed, and when the positioning is completed, the positioning of each plate with respect to each side member in the X direction is performed. Are simultaneously welded to the side members of the frame.

According to a second aspect of the present invention, there is provided a plate welding machine, in which each side member of a frame in which upper and lower members are connected by left and right side members is welded to the respective side members after aperture grill welding and the frame is subjected to heat treatment. A plate welding machine for welding a plate made of a metal having a thermal expansion coefficient larger than that of the frame in order to prevent a tensile force from being applied to the aperture grill, the plate welding unit supplying a pair of plate supply units and the plate supply unit. A pair of plate conveying parts for simultaneously conveying the formed plates one by one, and the pair of plates conveyed by the pair of conveying parts, and the pair of side members of the frame are mounted on the pair of plates. And a welding portion for receiving the frames, positioning them in the X direction and the Y direction, and welding the plates to the side members. And a plate / side member positioning member having a first surface for pressing the inner surface of the plate and a second surface for pressing the inner surface of the side member, and the welding member having the first surface. There is a positioning mechanism including a plate positioning member that receives the outer surface of the plate pressed in the X direction by the surface No. 1 and positions the plate in the X direction.
The plate with respect to the side member of the frame positioned in the direction, the plate receives the inner surface of the side member at the second surface and the inner surface of the plate at the first surface. -Positioning is performed in the X direction by the side member positioning member and the plate positioning member that receives the outer surface of the plate.

[0008]

According to the plate welding method of the first aspect, a pair of plates to be welded to one frame are simultaneously supplied to the pair of plate transport sections, and the pair of plate transport sections simultaneously transport the plates to the welding section. At the same time a pair of Bs in the frame
Since it is welded to the members, it is possible to improve efficiency.
Then, instead of simply positioning the frame and the plate individually, the plate is positioned and welded to the B member to which it is directly positioned so as to have a predetermined positional relationship in the X direction (width direction). Even if there is a slight variation in the size of the frame, the plate can be accurately positioned with respect to the B member so as not to be displaced in the width direction, and a desired bimetal effect can be obtained.

According to the plate welding machine of the second aspect, by setting a large number of plates in the pair of plate supply units, a pair of plates are automatically provided from each plate supply unit to each plate transport unit. Supplied. Then, when the pair of plate transfer parts receive the plates from the respective plate supply parts, they are automatically transferred to the welding part, and when the welding parts receive the pair of plates from the pair of plate transfer parts, they are positioned in the Y direction. Also, the frame can be received on the pair of plates to position the frame in the X and Y directions, and the positioning in the X direction with respect to the side member of the frame can be automatically performed, and then the welding can be automatically performed. . Therefore, the plates can be automatically welded, and automation, labor saving, and high efficiency can be achieved. Then, instead of simply positioning the frame and the plate individually, the positioning mechanism positions and welds the plate to a side member directly mounted on the plate so as to have a predetermined positional relationship in the X direction (width direction). Therefore, even if there is a slight variation in the size of the frame, the plate can be accurately positioned with respect to the side member so as not to be displaced in the width direction, and a desired bimetal effect can be obtained.

[0010]

EXAMPLES The STC plate welding method and ST of the present invention are described below.
The C-plate welder will be described in detail with reference to the illustrated embodiment. FIG. 1 is a plan view showing the overall outline of one embodiment of the STC plate welding method and STC plate welding machine of the present invention. In the drawing, reference numerals 1 and 1 denote STC plate supply units, which are provided on both left and right sides and are stacked on a chain, for example, 1
00 STC plates can be transported in the directions indicated by arrows a and a.

Reference numerals 2 and 2 denote a pair of STC plate transfer units,
The stacked STC plates (not shown in FIG. 1) conveyed by the STC plate supply units 1 and 1 are conveyed one by one in the directions indicated by arrows b and b. Reference numerals 3 and 3 are guides for the STC plate transport units 2 and 2. The STC
The plate transfer units 2 and 2 are connected to the suction pads 12 and 12 at ST.
The C plate is adsorbed and conveyed to the welding part 4. Reference numeral 5 is a frame before welding the aperture grille, and 6, 6 are a pair of B members thereof.

The STC plate welding machine welds the STC plate to the B members 6, 6 of the frame 5 as follows. For example, if 100 STC plates are stacked and set on the chains of the STC plate supply units 1 and 1, when the STC plates at the set portion are all exhausted, the chain is moved in the direction of arrows a and a.
Pitch transport. Then, the topmost stacked STC plate is positioned below the STC plate transport units 1 and 1. ST
The C plate transport units 1 and 1 are the most stacked STCs at the top.
The top STC plate among the plates is adsorbed, conveyed to the welding portion 4, and placed at a predetermined position. The placed STC plate is positioned in the Y direction (vertical scanning direction, in other words, the longitudinal direction).

After that, the frame 5 is automatically supplied onto the welded portion 4. As a result, B member 6 of frame 5,
6 is located on the positioned STC plate. Therefore, the frame 5 is positioned in the X direction and the Y direction,
Further, after the positioning is completed, each STC plate is positioned with respect to the B members 4 and 4 in a predetermined positional relationship in the X direction (horizontal scanning direction). This is because even if the STC plate itself and the frame itself are positioned, a slight variation occurs in the dimensions of the frame, so that the position of the STC plate in the X direction (that is, the width direction) with respect to the B members 4 and 4 is predetermined. This is not always possible, and what is important for obtaining the predetermined bimetal effect is the positional relationship in the X direction (width direction) with respect to the B members 4 and 4 of the STC plate.

2 and 3 show an STC plate supply unit and an S
2 is a front view showing the TC plate transport unit, FIG.
FIG. 3 is a side view. Reference numeral 7 denotes a chain, and a pair of L-shaped members 7a and 7a whose bottom portions are directed inward and a pair of L-shaped members 7b and 7b whose bottom portions are directed outward are alternately arranged along the longitudinal direction of the chain 7. Each L-shaped member 7
For example, 100 STC plates 8 are stacked between a and 7a and set. The L-shaped members 7b and 7b exist between the adjacent STC plates and define the position of each STC plate 8 in the width direction.

Numerals 9 and 9 are chain pressers, which play a role of pressing the side end portions of the chain 7 to eliminate variations in the height of the STC plate 8. Numerals 10 and 10 are push-up members that push up by the action of the cylinder 11. When this push-up operation is performed, the chain pressers 9 and 9 descend and the chain 7
The side end of the STC plate 8 is pressed to eliminate variations in the height of the STC plate 8. This prevents the chain 7 from bending and twisting, and the STC caused by this bending and twisting.
The STC plate adsorption error by the plate transport unit 2 is less likely to occur. When the chain 7 is transported, the pressers 9 and 9 are not pressed.

Reference numerals 11 and 11 denote STC plate suction tools 12,
With the stopper attached to the lift plate 13 together with 12, the lift plate 13 is designed to move down until the stoppers 11, 11 hit the uppermost STC plate 8, and at that time, by the STC plate suction tools 12, 12. Stoppers 11, 1 and ST for best adsorption
The positional relationship between the C plate suction tools 12, 12 is adjusted. When the suction is completed, the lift plate 13 automatically rises to a predetermined height, and then moves to the welded portion 4.

When the STC plate 8 at the adsorption position of the chain 7 is exhausted, this is detected by a sensor (not shown), and the chain 7 is automatically fed by one pitch, for example, 100 STC plates 8, The part where 8 and so on are brought to the suction position. Next, the positioning of the frame 5 and the STC plates 8, 8 of the welded portion 4 will be described.

FIG. 4 is a schematic plan view of a positioning mechanism (positioning mechanism for positioning the frame in the X and Y directions and the STC plate in the Y direction). The STC plates 8 and 8 are transported by the STC plate transporting units 2 and 2 to the shaded portions in FIG. Then, the positioning in the Y direction is performed. Next, the positioning of the STC plates 8, 8 in the Y direction is performed by positioning the Y direction positioning cylinder 20, so that the pair of reference receivers 19, 19 serving as a reference for positioning in the X direction receive one end surface of the STC plates 8, 8. This is performed by pressing the other end surface of the STC plate 8 in the Y direction with a pair of pressing tools 21, 21 driven by 20. The frame 5 is placed by the automatic supply so that the B members 6, 6 are placed on the STC plates 8, 8 (supported by a frame receiver (not shown)).

Then, the frame 5 is positioned in the X and Y directions. Positioning in the X direction is performed by centering in the X direction by pushing the B members 6, 6 from the inside in the X direction by the pair of pressing members 15, 15 by the X direction distribution mechanism 14. Further, for positioning in the Y direction, one A member 5a is received by a pair of reference receivers 16, 16 serving as a reference for positioning in the Y direction, and a pair of pressing tools 18 driven by a Y direction positioning cylinder 17, Frame 5 at 18, the other A member 5
It is performed by pushing in the Y direction with a.

Positioning of the STC plates 8, 8 in the Y direction is performed by a pair of reference receivers 1 serving as a reference for positioning in the Y direction.
By pushing the other end surface of the STC plate 8 in the Y direction with a pair of pressing tools 21, 21 driven by the Y direction positioning cylinders 20, 20 so that the reference numerals 9 and 19 receive the one end surface of the STC plates 8 and 8. To do. Next, the STC plates 8 and 8 are positioned in the X direction. This positioning is performed by pushing the frames 8 and 8 on the other side surface in the X direction so that the reference receiver existing at a specific position receives and positions one side surface of the STC plates 8 and 8. No, only B members 6 of frames 5 and 5,
The relative positional relationship of the STC plates 8, 8 with respect to 6 in the X direction is set to be a specific relationship.

This is because even if the frames 5 and 5 are of the same standard, there are subtle variations in the dimensions.
Positioning the C plates 8, 8 in the X direction
If the positioning is performed at the absolute reference position in the same way as the positioning in the Y-direction and the Y-direction, a slight variation occurs in the relative positional relationship of the STC plates 8 and 8 with respect to the B members 6 and 6 in the X direction. This is because there is a possibility that the effect may vary and the desired bimetal effect may not be obtained.

FIG. 5 is a view showing an X-direction positioning mechanism for positioning the STC plate in the X-direction. Reference numeral 22 is a base, 23 is a rail formed on the surface of the base 22 so as to extend in the X direction, 24 is a moving member guided by the rail 23 to move freely in the X direction, and 25 is fixed to the moving member 24. It is a stand that has an ST
A pressing piece 26 for pressing the outer surface of the C plate 8 is formed,
A positioning cylinder 27 is fixed to the inner end portion. Two
6a is an inner side surface of the pressing piece 26, which presses the outer side surface of the STC plate 8.

The positioning cylinder 27 has an X rod.
It is attached to the base 25 so as to face outward along the direction, and a positioning block 28 is fixed to the tip of the rod. A substantially upper half of the tip end surface of the positioning block 28 is a surface 28b that contacts the inner surface of the B member 6 of the frame 5, and a surface 28a that contacts the inner surface of the STC plate 8 is located below the surface 28b. When the surface 28b of the positioning block 28 is properly in contact with the inner surface of the B member 6 and the surface 28a is properly in the STC plate 8, the STC plate 8 is positioned with respect to the B member 6 in the X direction. So that the side of block 28
8b and 28a are formed.

Reference numeral 29 is a base fixed to the base 22, and 30 is a cylinder fixed to the base 29, and the rods are mounted so as to face outward along the X direction. The cylinder 30 plays a role of pushing the positioning cylinder 27 when the rod advances and locking the positioning state by the entire X-direction positioning portion composed of 24 to 28 parts. Next, the operation of the X-direction positioning mechanism shown in FIG. 5 will be described. When the positioning in the X direction is started, the frame 5 is positioned in the X and Y directions as described above, and the position is fixed.
The C plate 8 is only positioned in the Y direction.

Before the positioning in the X direction is started, the rod of the cylinder 27 is retracted, the positioning block 28 is appropriately displaced to the inside of the B member 6 and the STC plate 8, and the moving member 24 has the pressing piece 26 of the STC plate. Where it is located closer to the outside than 8
To position. Then, the cylinder 27 is caused to move the rod forward. Then, the surface 28b of the positioning member 28 immediately hits the B member 6. After that, when the rod advances, the moving member 24, the base 25, and the cylinder 27 main body retract together.

The position of the positioning block 728 of the B member 6 when the surface 28b of the positioning block 728 hits the B member.
When the cylinder 27 continues to move the rod forward, the B-member 6 causes the positioning block 2 to move.
The moving member 24, the base 25, and the main body of the cylinder 27 are integrally retracted by the amount of advance of the rod of the cylinder 27 after the advance of 8 is blocked. Then, due to the retreat, the STC plate 8 is sandwiched by the surface 28a of the positioning block 28 and the inner surface 26a of the pressing piece 26 from both sides, and then the advance of the rod of the cylinder 27 is completed. At this time,
The STC plate 8 is relatively positioned in the X direction with respect to the B member 6 by the surfaces 28b and 28a of the positioning block 28.

Then, the cylinder 30 is operated to push the cylinder 27 to the B member side by the rod to lock the positioned state. This completes the positioning of the STC plate 8 and enables welding. Needless to say, there is a pair of such X-direction positioning mechanisms, and only one positioning mechanism is shown in FIG.

FIG. 7 is a front view showing the welding gun mechanism.
In this welding gun mechanism, the frame 5 is set by the lifter and the frame 5 is lifted up by the lifter after the welding is completed. Therefore, when the setting is performed, the welding gun swings outward and escapes from the positioning portion. And an escaping fulcrum, 31 is an oscillating fulcrum, 32 is an oscillating cylinder,
c is an arrow indicating the swing direction. 33 is the upper electrode, 34
Is a lower electrode, and 35 is a pressurizing cylinder, which plays a role of sandwiching and pressing the B member 6 and the STC plate 8 by the upper electrode 33 and the lower electrode 34.

Specifically, the mechanism for pushing the lower electrode 34 upward by the pressurizing cylinder 35 and the upper electrode 33 are integrally formed, and these are integrally formed to form the linear guide 3.
It is movably attached to a support member 37 by 6, 36. The swing in the direction indicated by the arrow c is performed by swinging the support member 37 around the fulcrum 31 as the swing cylinder 32.
It is performed by rotating with.

Reference numeral 38 is a cylinder for pushing up the pressurizing cylinder 35 by the pushing-up member 39 when starting the frame 5 from the electrodes 33, 34. Incidentally, 40 is a stopper, and when the gun mechanism rocks for welding, the rocking stops when the B member 6 hits the stopper 40. There are three such mechanisms on the left and right sides of the frame 5, and each of the STC plates 8 and 8 is spot-welded at three points simultaneously.

Next, the operation will be described. Frame 5 and ST
Cylinder 3 when C plate 8 is not set
The pressurizing cylinder 35 is pushed up by 8 (hence the upper electrode 33 is also located on the upper side) and tilts outward. At this time, the pressurizing cylinder 35 does not perform the forward movement of pushing the lower electrode 34 to the upper side.
Between 34 is fully open.

When the STC plates 8 and 8 and the frame 5 are set and positioned, the swing cylinder 3
2, the supporting member 37 swings so as to be in the vertical direction and stops when the stopper 40 hits the B member 6. At this time, the upper electrode 33 is located at a position appropriately separated from the B member 6 to the upper side, and the lower electrode 34 is located at a position appropriately separated from the STC plate 8 to the lower side.

Next, in the cylinder 38, the rod is retracted so that the push-up member 39 is lowered. Then, the pressurizing cylinder 35 and the upper electrode 33 are integrally lowered, and eventually, the upper electrode 33 hits the B member 6, and thereafter, even if the pushing-up member 39 is lowered, the upper electrode 33 stops lowering. Then, the push-up member 39 separates from the pressure cylinder 35. Next, the lower electrode 34 is pushed up by the pressurizing cylinder 35, and this lower electrode 34 eventually contacts the lower surface of the STC plate 8, and the force of the pressurizing cylinder 35 causes the STC plate 8 and the lower electrode 34 to be separated between the upper electrode 33 and the lower electrode 34. The B member 6 is pressurized and energized in a pressurized state to perform spot welding.

When the welding is completed, the pressurizing cylinder 35 retracts (lowers) the lot having the lower electrode 34 at its tip, and the cylinder 38 raises the lifting member 39 to push up the cylinder 35 to lift the upper electrode 35. Raise. As a result, the STC plate 8 and the B member 6
Are released from the electrodes 33, 34. Next, the gun mechanism is rocked by the rocking cylinder 32 so that the frame 5 can be taken out. Then, the frame is lifted by a lifter (not shown).

[0035]

According to the plate welding method of the first aspect of the present invention, the pair of plates are simultaneously conveyed to the welding portion, and the frame is mounted on the welding portion so that the pair of side members are placed on the pair of plates. Supply, positioning of each plate in the Y direction and positioning of the frame in the X and Y directions,
When the positioning is completed, the plates are positioned with respect to the side members in the X direction, and then the plates are simultaneously welded to the side members of the frame. Therefore, according to the plate welding method of the first aspect, the pair of plates to be welded to one frame are simultaneously supplied to the pair of plate transport units, and the pair of plate transport units simultaneously transport the pair of plates to the welding unit. Since it is welded to the pair of side members of the frame, high efficiency can be achieved.

Then, not only the frame and the STC plate are individually positioned, but also the STC
Since the plate is positioned and welded to the B member to which it is directly attached so as to have a predetermined positional relationship in the X direction (width direction), even if there are subtle variations in the size of the frame, Thus, the STC plate can be accurately positioned so as not to be displaced in the width direction, and a desired bimetal effect can be obtained.

According to a second aspect of the present invention, in the plate welding machine, when the upper and lower members are connected to the left and right side members by a side member, the side members are subjected to heat treatment after the aperture grill welding and the frame is subjected to heat treatment. A plate welding machine for welding a plate made of a metal having a thermal expansion coefficient larger than that of the frame in order to prevent a tensile force from being applied to the aperture grill, the plate welding unit supplying a pair of plate supply units and the plate supply unit. A pair of plate conveying parts for simultaneously conveying the formed plates one by one, and the pair of plates conveyed by the pair of conveying parts, and the pair of side members of the frame are mounted on the pair of plates. And a welding portion for receiving the frames, positioning them in the X direction and the Y direction, and welding the plates to the side members. And a plate / side member positioning member having a first surface for pressing the inner surface of the plate and a second surface for pressing the inner surface of the side member, and the welding member having the first surface. There is a positioning mechanism including a plate positioning member that receives the outer surface of the plate pressed in the X direction by the surface No. 1 and positions the plate in the X direction.
The plate with respect to the side member of the frame positioned in the direction, the plate receives the inner surface of the side member at the second surface and the inner surface of the plate at the first surface. -Positioning is performed in the X direction by the side member positioning member and the plate positioning member that receives the outer surface of the plate. Therefore, according to the plate welding machine of claim 2, by setting a large number of plates in the pair of plate supply units, the pair of plates is automatically supplied from each plate supply unit to each plate transport unit. It

Upon receiving the plates from the respective plate supply units, the pair of plate transport units automatically transports the plates to the welding unit. The welding unit has the positioning mechanism described above, and the plate transport units pair the plate transport units. When the plate is received, the plate is positioned in the Y direction, then the frame is received on the pair of plates to position the frame in the X direction and the Y direction, and further the positioning in the X direction with respect to the side member of the frame is performed by the positioning mechanism. It can be done automatically and then automatically. Therefore, the plates can be automatically welded, and automation, labor saving, and high efficiency can be achieved.

Then, instead of simply positioning the frame and the plate independently of each other, the positioning mechanism causes the plate to have a predetermined positional relationship with the side member directly mounted on the plate in the X direction (width direction). Since it is positioned and welded in such a way, even if there is a slight variation in the size of the frame, the plate is accurately positioned with respect to the side member so that there is no positional deviation in the width direction, and the desired bimetal effect is obtained. You can

[Brief description of drawings]

FIG. 1 is a plan view showing an overall outline of one embodiment of an STC plate welding machine of the present invention.

FIG. 2 is a STC plate supply unit and STC of the above embodiment.
It is a front view which shows a plate conveyance part.

FIG. 3 is a STC plate supply unit and STC of the above embodiment.
It is a side view which shows a plate conveyance part.

FIG. 4 is a schematic plan view showing a positioning mechanism for the frame and STC plate of the above embodiment.

FIG. 5 is a view showing a positioning mechanism in the X direction of the STC plate of the above embodiment.

FIG. 6 is a front view of the welding gun mechanism portion of the above embodiment.

[Explanation of symbols]

1 STC plate supply section 2 STC plate transfer section 4 welds 5 frames 6 B members 8 STC plate

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01J 9/14

Claims (2)

(57) [Claims] 1. The upper and lower members are connected by the left and right side members.
Aperture grille on each side of the frame
After welding, when the frame is subjected to heat treatment, the
To prevent tension from being applied to the perch grill
Is made of a metal that has a larger coefficient of thermal expansion than the frame.
In a plate welding method for welding a plate, a pair of the plates are simultaneously conveyed to a welding portion, and the frame is supplied to the welding portion so that the pair of side members are placed on the pair of plates. Positioning of the plate in the Y direction and X of the frame
Direction and Y direction, and after the positioning is completed, the plates are positioned with respect to the side members in the X direction, and then the plates are simultaneously welded to the side members of the frame. Plate welding method characterized in that 2. A tensile force is applied to the aperture grills after the aperture grilles are welded to the respective side members of the frame in which the upper and lower members are connected to each other by the left and right side members. A plate welding machine for welding a plate made of a metal having a thermal expansion coefficient larger than that of the frame so as not to be added, wherein a pair of plate supply units and one plate supplied by the plate supply unit are provided. A pair of plate conveying parts that convey simultaneously with each other, the pair of plates conveyed by the pair of conveying parts are received, and the frame is received so that the pair of side members of the frame is placed on the pair of plates. and a weld part for welding the plates to the respective side members as well as positioned in the X and Y directions, consist, on the weld A plate / side member positioning member having a first surface for pressing the inner side surface of the plate and a second surface for pressing the inner side surface of the side member, and pressing in the X direction by the first surface of the positioning member. There is a positioning mechanism including a plate positioning member that receives the outer surface of the plate and positions the plate in the X direction. The positioning mechanism positions in the X direction and the Y direction.
To the side member of the frame
The inner surface of the side member by the second surface
The plate which receives the inner surface of the plate at the surface 1
The side member positioning member and the outer surface of the plate are received.
By the plate positioning member, to a position in the X direction
Plate welding machine, characterized in that formed by such that