JP2002331381A - Welding device for parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a welding device for parts wherein the parts are mutually welded while securing the sufficient welding strength without causing a welding defect under the high productively, and also in the maintenance for a welding jig, the stopping of a welding process is not required. SOLUTION: On the both ends of a turning table 11, a magazine 31 of the welding jig is provided rotatably so that when one part is at the set position S of a welding chamber 3, the other part is at a welding position W, and the setting up of a part A, and a part B and the welding are proceeded parallely. And a spring constant of a press spring 23 on the press pin side 23 is made larger than a spring constant of a pedestal spring 47 supporting the part A and the part B, and a ring receiver 34 supporting a ring R of the part A before pressing is inserted direct below the ring R before pressing to apply pressure. And the laser welding is applied at the same time to the welding place of the part A and the part B applied with a press-contact from laser radiation terminals 61 in the four directions, then the magazine 31 is rotated to displace the welding place, and thereafter the welding is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component welding apparatus, and more particularly, to a component welding apparatus that suppresses variation in quality due to welding and improves mass productivity.

[0002]

2. Description of the Related Art When two parts are welded and assembled, it is a matter of course that the two parts are welded in a state where they are in pressure contact with each other. In some applications, the product becomes defective and reduces the product yield. When the welding target is a mass-produced component, it is desired that the tact time of the component in the welding device be reduced as much as possible.

For example, FIG. 1 shows a part constituting a part of an electron gun for a cathode ray tube. A grid member A (hereinafter, referred to as part A) having bead glass G attached to both sides and having a ring R at an upper end is shown. 1A is a front view thereof, and FIG. 1B is a side view thereof. Also, FIG.
2A and 2B are views showing a first grid B (hereinafter, referred to as a part B) welded to an upper end portion of FIG.
B is a side view. FIG. 3 is a front view showing a state in which they are combined, and a part B is inserted between two bead glasses G of the part A and combined.
At this time, the lower end of the component B is slightly fitted into the ring R of the component A.
Are press-fitted, and fillet welding is performed on a contact portion (details will be described later) indicated by a circle between the inner peripheral side of the upper surface of the ring R and the lower end of the component B.

FIG. 24 is a plan view of the conventional component welding apparatus 100 with the cover 109 removed, and FIG. 25 is a front view with the cover 109. With the cover 109 removed from the welding device 100, the parts A and B are attached to the welding jig 102 at the center and pressed against the welding jig 102. Subsequently, the cover 109 is hung to block the laser light, and laser is irradiated from the four laser irradiation ends 121 to the press-contact portions of the parts A and B, so that the parts A and B are welded at four points. FIG. 26 shows a welding jig 102 fixed to the turntable 101.
27 is a partially broken front view, and FIG. 27 is a partially broken side view.

Referring to FIGS. 26 and 27, turntable 101
, A welding jig 102 is fixed with bolts 102b,
A guide pin 103 provided on the welding jig 102
Is inserted at the lower end. The welding jig 102 is a part A,
Lower half 104 for setting component B, pressing block 11
1 and an upper half 114 for pressing parts A and B in combination with the lower half 104. Upper half 114
The two downward-pointing rods 116 are inserted into insertion holes provided in the right and left columns 105 of the lower half 104, respectively, and are combined. The positioning pin 11 hanging from the lower surface of the pressing block 111
2 is inserted through the component B until it reaches the component A, and the components A and B are positioned.

Referring to FIG. 27, when the rod 116 of the upper half 114 is inserted into the column 105 of the lower half 104, the spring 110 is compressed by the upper end of the clamp lever 118, and the lower end of the clamp lever 118 is supported by the fulcrum. 119
, The hook 117 at the lower end is locked to the locking portion of the column 105, and after being locked, the spring 110 presses the upper end of the clamp lever 118 in the opening direction, so that the upper half The part 114 is clamped to the lower half part 104, and the parts A and B are pressed against each other. That is, at the four corners of the pressing block 111 of the upper half 114 shown in FIG.
When the pressing pin 115 attached via the spring 113 presses the component B, the lower end of the component B is pressed against the ring R of the component A.

That is, the worker sets and clamps the parts A and B on the welding jig 102,
Cover the entire surface of the laser
The laser is simultaneously irradiated from 21 and the parts A and B
Are welded at four points. When performing eight-point welding, it is necessary to remove the cover 109 and manually turn the welding jig 102.

[0008]

A conventional parts welding apparatus 1
In 00, the parts A and A are set up at the position shown in FIGS. 24 and 25, that is, the position shown in FIG. 27 rotated 90 degrees from the position shown in FIG. There is a problem as described. 1. In addition to the 90-degree rotation of the welding jig 102, all operations other than welding with a laser, such as pressurization and depressurization of the parts A and B by the clamp lever 116, are performed manually. Both columns 105 of the welding jig 102
In some cases, the interval between the welding steps is slightly narrow, and the above welding process is a complicated operation. 2. All of the pressing force of the pressing block 111 is applied to the ring R of the component A. When the pressing force is increased, the ring R is deformed and the welding quality is easily deteriorated. Conversely, when the pressing force is reduced, the components A and B are reduced. Floats between them and causes poor welding. 3. The manual turning of the welding jig 102 for the above-described eight-point welding has a low rotation angle accuracy and a low reproducibility of the welding location. 4. The welding jig 102 is attached to the rotary table 101 with the bolt 10
Since it is fixed at 2b, if maintenance is required for the welding jig 102, the welding process must be stopped and removed.

The present invention has been made in view of the above-mentioned problems, and the first part and the second part are welded with high reproducibility and high mass productivity as much as possible without human intervention, so that the welding strength is sufficiently high. It is another object of the present invention to provide a component welding apparatus which is ensured and does not need to stop the welding process even when maintaining a welding jig. Japanese Patent Application Laid-Open No. 7-220649 discloses an electron gun for a cathode ray tube electron gun in which parts to be welded are specified in order to suppress a dimensional change between parts due to thermal deformation. There is no mention of the device. Japanese Patent Application Laid-Open No. 7-78556 discloses an assembling method in which a pin of a first micro component is inserted into a hole of a second micro component to determine a relative position. There is no. Also, JP-A-10-188
Japanese Patent Application Laid-Open No. 799 discloses an assembly method of an electron gun using a jig for positioning an electrode material with reduced frictional resistance, but similarly does not describe a component welding apparatus.

[0010]

Means for Solving the Problems The above-mentioned problems can be solved by the structure of claim 1. The means for solving the problems will be described as follows.

According to a first aspect of the present invention, there is provided a component welding apparatus for welding an end portion of a first component and an end portion of a second component under pressure welding, wherein the first component and the second component are set and welded. A plurality of magazines as jigs are arranged on the rotary table at equal angular intervals, and when one magazine stops at the set position, the other magazine stops at the welding position, and the magazine rotates. This device is easily attached to and detached from the table. Such parts welding equipment is
At the time when the first part and the second part are set to the magazine at the set position, the first part and the second part already set to the magazine at the welding position can be welded, and the maintenance of the magazine is performed. In this case, it is not necessary to stop the welding process only by replacing the spare magazine, and the productivity of the welding process is increased.

According to a second aspect of the present invention, the rotary table is rotated, the magazine is moved from the set position to the welding position, the first component and the second component are pressed, and the press-contact portion is formed. Is a device that irradiates a laser simultaneously to a plurality of locations around the device to perform welding. In such a component welding apparatus, since the periphery of the press-contact portion of the first component and the second component is welded at the same time, the distortion deformation seen when sequentially welding the periphery is not generated.

According to a third aspect of the present invention, there is provided the component welding apparatus according to the third aspect, wherein an annular portion protruding in a flange shape at an upper end of the first component, and a lower end portion of the second component pressed against an inner peripheral portion of the annular portion. The pressurizing mechanism in the case of welding the first part and the second part on the magazine, a set seat plate on which the first part and the second part are set via the first spring, and a second spring having a larger spring constant than the first spring. A pressurizing pin attached to the upper end of the second part, the pressing spring being superimposed on the upper end of the second part with almost no compression, and pressed from above by a pressurizing source; An interposition member and an annular member of which the first spring is compressed by pressurization and then lowered to a height position after being inserted directly below the annular portion of the first component before being pressurized and placed on the magazine and supported With an annular part It is a device.

In such a component welding apparatus, the annular portion receiver is easily inserted immediately below the annular portion of the first component before pressing, and the annular portion support supports the annular portion of the first component during pressing. Because, the annular part of the first part is not deformed by pressure,
In addition, the pressure is always applied with a constant force by the pressure pin via the second spring, so that welding can be performed in a pressure-contact state without variation and stable welding quality is provided.

According to a fourth aspect of the present invention, there is provided a component welding apparatus according to a fourth aspect of the present invention, wherein the pressing interposition member is provided with a positioning pin inserted from the second component to the first component.
Such a component welding device enables positioning of the first component and the second component before pressing. According to a second aspect of the present invention, the magazine is rotatably mounted on the rotary table, and the magazine is rotated in a state where the rotary table is stopped after welding, so that the welding position is shifted. This is a device where post welding is performed. Such a component welding apparatus prevents a trouble due to insufficient welding strength by increasing the welding strength and raising the minimum strength.

According to a second aspect of the invention, the laser welding shutter is inserted between the set position and the welding position before welding is started, and when the welding is completed, the laser interrupting shutter is closed. Is the device to be pulled back. Such a component welding apparatus protects an operator at the set position from obstacles caused by the laser beam, and can simultaneously proceed with set-up and welding of the first component and the second component.

According to a seventh aspect of the present invention, there is provided a component welding apparatus according to the first aspect, wherein the first component and the second component are components constituting a grid portion of the electron gun. Such a component welding apparatus stabilizes the quality of the parts of the electron gun that are welded together and greatly improves mass productivity.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, a component welding apparatus according to the present invention provides a component welding machine for welding an end of a first component and an end of a second component under pressure welding. Two or more magazines as jigs for setting and welding two parts,
It is arranged on the rotary table at equal angular intervals, and when one magazine stops at the set position, the other magazine stops at the welding position.In addition, the magazine is rotatable on the rotary table and can be attached and detached. It is easily installed.

Two or more magazines are arranged at equal angular intervals on the rotary table. The time required for setting the first part and the second part to the magazine at the set position, the time required for welding at the welding position, and Are substantially equal to each other, the set position and the welding position are each set to one location, and two magazines are provided on the rotary table, so that welding can be smoothly advanced. Further, the rotation of the rotary table may be 360 degrees clockwise or counterclockwise, or may be 180 degrees reciprocation on one side depending on the relation to the case where the wiring to the magazine or the air piping is twisted. Good. If necessary, the set position and the welding position may each be two or more.

It is desirable that the magazine be mounted on the rotary table in an easily removable manner such that an upward insertion pin provided on the rotary table is inserted from above into the insertion hole of the magazine. Of course, you may make it attach with a clamp. If the magazine requires maintenance by facilitating attachment / detachment, replace it with a spare magazine that has already been maintained.
The welding process can proceed without delay.

In a parts welding apparatus in which two magazines are provided at symmetrical positions on a rotary table, and one magazine is at a set position, the other magazine is at a set position. The first component and the second component are set in a magazine, and a pressure interposition member provided with a pressure pin with a pressure spring can be overlaid. It is desirable that the pressure interposition member be provided with, in addition to the pressure pin, a positioning pin inserted from the second component to the first component when being placed on the upper end of the second component. By using such a pressure interposed member, the positioning of the first component and the second component can be performed simultaneously.

When the setting of the first part and the second part in the magazine is completed, the rotary table is rotated, the magazine is moved from the set position to the welding position, and the magazine is pressed through the pressurizing member to perform welding. Will be The pressurizing source may be a pneumatic cylinder or a mechanically tightened clamp, and the type of the pressurizing source is not limited.

When welding the annular portion protruding sideways like a flange at the upper end of the first component and the lower end portion of the second component pressed against the inner peripheral edge portion of the annular portion, the annular portion is deformed by the pressure welding. Although the quality of the obtained electron gun tends to deteriorate, in such a case, it is important to support the annular portion of the first part on the lower side and to press it with a necessary and sufficient pressure. To do so, the first and second parts are set on the set seat plate provided on the magazine via the first spring, and a pressure pin is attached to the upper end of the second part via the second spring. The pressurized intervening members are overlapped,
The pressurizing member is pressed from above by a pressurizing source.
The spring constant of the second spring is larger than that of the first spring. Then, at the time when the pressurized interposition member before the pressurization by the pressurization source is overlapped, the first spring is hardly compressed by the weight of the pressurized interposition member,
The spring constant of the first spring is set so that the height position of the annular portion of the first component hardly decreases.

In the above-mentioned state, the annular portion receiver movably provided on the magazine is inserted directly below the annular portion of the first component from, for example, both sides. At this time, since the height of the annular portion receiver is set so that the annular portion does not contact the annular portion receiver, the annular portion receiver is inserted without any problem. Thereafter, when the pressure interposition member is pressurized by the pressure source, the second spring is hardly compressed and the first spring is compressed, so that the height of the set seat plate is reduced and the annular portion of the first part is formed. Also, the height position is lowered so that it comes into contact with the annular portion receiver and is supported. Then, thereafter, the annular portion of the first component and the lower end of the second component are pressed against each other by a constant pressing force determined by the spring constant of the second spring, and are not pressed by an excessive force. No deformation occurs, and good welding quality is always obtained. Of course, the spring constant of the second spring can be appropriately selected.

The annular portion receiver is inserted just below the annular portion of the first component before pressurizing, and supports the annular portion during pressurization to withstand the pressure contact between the first component and the second component. As long as it can be of any shape, it is fixed to a movable column provided reciprocally in the horizontal direction on the magazine,
At the time of pressurization, it is preferable that the first and second parts set up on the set seat plate be moved so as to sandwich them from both sides. That is, when the first part and the second part are set on the set seat plate, since the movable column is at the standby position, there is an advantage that there is no obstacle around the set seat plate and the setting operation is facilitated. When a pressurizing mechanism using such an annular receiver is used, the welding position is based on the upper surface of the annular receiver, and even if the height of the first part and the second part fluctuates, the height of the weld is changed. Since the position does not change, for example, when welding with a laser, there is an advantage that adjustment of the focal position of the laser is not required.

For welding the first part and the second part at the welding position, general welding methods such as arc welding, gas welding, resistance welding and the like can be adopted. If it is a part, especially when it is necessary to weld so as not to cause distortion deformation due to welding, it is necessary to simultaneously weld a plurality of symmetrical points around the press-contact part,
For this purpose, it is desirable to perform welding by using a laser irradiated from the irradiation ends of a plurality of optical fibers branched from the optical fibers of the same oscillator. Usually YAG
Lasers and CO2 lasers are used. In addition, it is preferable that the magazine be rotated at the welding position in a state where the rotary table is stopped so as to increase the welding strength between the first component and the second component, and welding be performed at different welding locations. The rotation for changing the welding location may be performed a plurality of times.

Further, before welding is started on the first and second parts moved to the welding position together with the magazine,
It is desirable to insert a laser cut-off shutter between the welding position and the set position, and to provide a laser light cut-off mechanism that can be removed when welding is completed. By isolating the worker at the setting position from the laser beam, the setting and welding of the first and second parts can be simultaneously advanced, and the productivity of the welding process can be improved. The method of inserting the laser cut-off shutter is preferably a method of descending from above in terms of small space restrictions, but it may be moved horizontally from the side and may be inserted, and the method of insertion and pullback is not limited. . An iron plate or the like is used for the laser cutoff shutter.

[0028]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a component welding apparatus according to the present invention.

(Embodiment) FIG. 4 shows a component welding apparatus 1 according to an embodiment.
5 is a front view thereof, and FIG. 6 is a plan view of a cross section taken along line [6]-[6] in FIG. That is, in the component welding apparatus 1, a welding chamber 3 is provided on a gantry 2 having a built-in drive mechanism and control mechanism, and a work table 4 and a work window 5 are provided on the worker M side. In the welding chamber 3, two magazines 3 as welding jigs are provided.
1 is provided, and one magazine 31 is at a set position S on the worker M side,
This shows a state where the other magazine 31 is at the welding position W. In the welding chamber 3, laser irradiation ends 61 for welding are provided on all sides around the welding position W, as described later. Then, the setup of the components A and B at the set position S and the welding of the components A and B at the welding position W are performed simultaneously and in parallel. Hereinafter, these will be described in detail.

7 to 9 are enlarged views of the welding chamber 3, FIG. 7 is a side view, FIG. 8 is a front view, and FIG. 9 is a plan view from a ceiling surface. As shown in FIGS. 7 and 9, a rectangular rotary table 11 is installed in the welding chamber 3, and two magazines 31 are provided at both ends of the rotary table 11.
Is attached. 7 and 9, the position of the left magazine 31 on the worker M side is the set position S of the parts A and B, and the position of the magazine 31 on the right, that is, the back side from the worker is the welding position W. It is. In addition,
In FIG. 9, the illustration of the magazine 31 at the welding position W is omitted to show the irradiation ends 61 of the four lasers. FIG. 10 is a cross-sectional view taken along the line [10]-[10] in FIG. 7 and 8
In FIG. 7, only the center line of laser irradiation is indicated by a thin line L.

Further, as shown in FIGS. 7 to 10, an air cylinder 6 is hung from the ceiling of the welding chamber 3, and this air cylinder 6 is attached to the magazine 31 which has been moved to the welding position W. It is a pressurizing source for pressurizing the set components A and B via a pressurizing pad 21 and a pad holder 25 which will be described later as pressurizing interposed members. Further, a laser shut-off shutter 9 is provided so as to be able to move up and down by an air cylinder 7 installed on the ceiling surface of the welding chamber 3. It is lowered during.

The details of the magazine 31 are shown in the front view of FIG. 11, the plan view of FIG. 12, and the side view of FIG. 13, together with the parts A and B set up. FIG. 13 does not show the components A and B. FIG. 14 shows FIG.
FIG. 2 is a partial cross-sectional view taken along line [14]-[14] of FIG. Referring to FIG. 11, a magazine 31 is easily fixed to a turntable 13 attached to a turntable 11 via a bearing 12. That is, as shown in the plan view of FIG. 12, two upward pedestal pins 13p provided on the rotating table 13 are inserted into the base plate 32 of the magazine 31, the magazine 31 is positioned, and easily fixed and detached. Have been. Therefore, when maintenance of the magazine is required, it is only necessary to replace the magazine with a spare which has been prepared in advance. Also, parts having different sizes depending on the type of the electron gun can be dealt with by simply changing the magazine 31. On the base plate 32, two movable columns 33 are provided with forward and backward air pipes 35 and 35 '.
The movable column 33 is opened and closed between the position indicated by the solid line and the position indicated by the dashed line by the air cylinder 36 provided with A ring receiver 34 for receiving and supporting the R is attached. The L wrench 39 in the figure is used for adjusting a stopper position for determining a forward end position of the movable column 33.

FIG. 15 shows a state in which the movable column 33 shown in FIG. In this state, the part M and the part B are set by the worker M. The distance between both ring receivers 34 is approximately 170 mm, and the distance between both movable columns 33 is a sufficient distance for worker M to set parts A and B. The setting of the parts A and B is performed as follows. 14, a pedestal 45 is fixed to the center of the base plate 32 by bolts 37 and positioning pins 38, and an upward insertion pin 46 is implanted on the pedestal 45. Further, a pedestal spring 47 is provided between the insertion pin 46 and the pedestal 45.
The set seat plate 48 is inserted up and down freely through
The insertion pins 46 are inserted into the lower holes of the components A, and the components A and B are set. On the components, the pressure pad 21 is stacked together with the pad holder 25 as shown in FIG. Is completed.

The pressure pad 21 and the pad holder 25 will be described in detail with reference to FIGS.
5, two fixed columns 53 are fixed on the pedestal 45 on the front side and the back side of the worker M by inserting lower ends thereof, and insertion holes provided in the fixed columns 53 respectively. 56, the downward insertion rod 26 of the pad holder 25 to which the pressure pad 21 is fixed is inserted.
On top of The reason why the two insertion rods 26 of the pad holder 25 have different lengths and thicknesses is to prevent an insertion error by the worker M.
The insertion hole 5 of the fixed column 53 corresponding to the insertion rod 26
6 is provided with a ball bush 57 for facilitating insertion. At this time, the positioning pin 22 hanging from the lower surface of the pressure pad 21 is inserted until the positioning pin 22 penetrates the component B and reaches the component A to position the component A and the component B. A pressure pin 24 attached to the pad 21 via a pressure spring 23 and protruding downward contacts the upper end of the component B. Thereafter, when the worker M switches on, the air cylinder 36 is driven and the movable column 33 is closed from both sides. All subsequent steps are performed automatically.

FIG. 16 shows parts A and B before the movable column 33 is closed, the ring receiver 34 attached to the movable column 33, the pressure pad 21, and the pad holder 2.
It is a figure which expands and shows the relationship with 5. A set seat plate 48 is vertically inserted into an upward insertion pin 46 of the pedestal 45 via a pedestal spring 47.
6 is inserted into the lower hole of the component A, and the components A and B are placed and set on the set seat plate 48. The spring constant K ₂₃ of the pressure spring 23 on the pressure pad 21 side and the pedestal 4
A spring constant K ₄₇ 5 side of the base spring 47 is chosen so that the relationship shown below is. Spring constant K ₂₃ > Spring constant K ₄₇ Then, as described above, the pressing pad 21 is superimposed on the component B together with the pad holder 25. At this time, the pedestal spring 47 connects the pressing pad 21 to the pad holder 25. It is hardly compressed depending on the weight.
Does not change, the height position of the ring R at the upper end of the component A hardly changes. Therefore, about 2 m from the ring R
The ring receiver 34 of the movable column 33 provided below m has no obstruction due to the closing of the movable column 33,
As shown by the alternate long and short dash line, it is inserted just below the ring R.

When the movable column 33 is closed and the ring receiver 34 is inserted just below the ring R as described above, the turntable 11 is rotated clockwise by 180 degrees, and the magazine 31 at the set position S is removed. It is moved to the welding position W. The rotation of the rotary table 11 with respect to the set position S and the welding position W is performed using an absolute type direct drive motor with a repeatability of ± 5 seconds.
Extremely high positional accuracy is obtained.

FIG. 17 shows the parts A and B on the magazine 31 moved to the welding position W, the pressure pad 21 and the pad holder 25 superposed on the part B, and the welding chamber 3 shown in FIG. The rod of the air cylinder 6 is lowered,
Press down the pressure pad 21 together with the pad holder 25,
Pressure pin 2 provided via pressure spring 23
FIG. 4 is a diagram illustrating a state in which a part B is pressurized by 4; That is, the pressure spring 23 is hardly compressed,
When the pedestal spring 47 is compressed, the component A
The height of the ring R is reduced, and the movable pillar 33 comes into contact with and is supported by the ring receiver 34. Thereafter, parts A, component B are welded are held in pressure contact state with a constant force based on the spring constant K ₂₃ of the pressure spring 23. Therefore, there is no possibility that the pressing force is too large to deform the ring R, or that the pressing force is too small to cause poor welding. FIG. 18 shows the ring R and the ring receiver 3 in FIG.
FIG. 4 is a plan view showing a positional relationship with the position No. 4;

When the above pressed state is obtained, FIG.
9 is lowered, and at the welding position W, the four laser irradiation ends 6 shown in FIG.
From 1 the laser is applied to the welding point between parts A and B. FIG. 19 is an enlarged plan view showing the part A with the ring R and the part B partially omitted. First, there are four parts of the inner peripheral edge of the ring R and the outer peripheral surface of the lower end of the part B indicated by a dashed line. Laser irradiation for 9.0 milliseconds is simultaneously performed on the welding point P, and the parts A and B are welded. Note that FIG.
The four * marks indicated by the symbol T indicate the pressure points by the pressure pins 24.

After the above-mentioned welding, the magazine 31 is rotated on the rotary table 11 by a small angle, the welding point is shifted, and the welding is performed again. FIG. 20 is a plan view showing the rotation of the magazine 31 at the welding position W on the turntable 11. On the stationary rotary table 11, the turntable 13 to which the magazine 31 at the welding position is fixed is turned by a predetermined angle from the position indicated by the solid line to the position indicated by the dashed line,
The laser is again irradiated, and the four welding points Q shown in FIG. 19 are simultaneously welded. That is, the parts A and B are welded at a total of eight points.

The rotation of the magazine 31 shown in FIG.
1. This is performed by a rotating mechanism shown in FIG. FIG. 21 shows the turntable 1 of the turntable 11, the bearing 12, and the magazine 31.
FIG. 3 is a side view showing an air cylinder 8 serving as a driving source of rotation, and a bearing 1 fixed to a turntable 11.
The turntable 13 is rotatably supported by the base 2. As shown in FIG. 22, which is a corresponding back view, the center of the turn lever 14 is fixed to the axis of the turn table 13 on the back side, and the air cylinder 8 is attached to one end of the turn lever 14. The return cam 17 is attached to the other end of the rotary table 11 between the locking cam 16 and the locking portion 16 on the back side of the rotary table 11 in the pulling direction. An adjusting screw 19s is provided so as to clamp the tip of a side lever 18 attached to the center of the rotating lever 14.
Attached two stoppers 19 are attached to the back side of the turntable 11, and usually rotate in an angle range of 6 to 7 degrees depending on the interval between the adjustment screws 19s.

That is, when the first welding is completed, the rod of the air cylinder 8 is extended and the rotating cam 15 is pushed for a required time, whereby the rotating lever 14 is moved to the stopper 19.
The rotation is restricted by the rotation angle. As shown in FIG. 20, the magazine 31 is rotated and the welding points are shifted to perform welding at the four welding points Q shown in FIG.
The welding strength is increased and the minimum strength is raised. When the welding at the welding point Q is completed, the rod of the air cylinder 8 is pulled back, so that the return spring 17 operates to return the turntable 13 and the magazine 31 to the original positions, and then the laser cutoff shutter 9 is raised. Then, the rotary table 11 is rotated 180 degrees counterclockwise, and the two magazines 31 change positions. Then, after the movable column 33 is opened at the set position S, the pressure pad 21 and the pad holder 25 are removed from the parts A and B that have been welded by the worker M, and the parts A and B are moved to the set position S. , And then unwelded parts A and B are set. On the other hand, at the welding position W, the parts A and B on the magazine 31 rotated from the set position S are welded as described above.

As described above, the component welding apparatus 1 of the embodiment
Since the configuration is greatly streamlined and the steps are automated as much as possible in comparison with the conventional parts welding apparatus 100, the time required for welding parts A and B is greatly reduced, and mass production is possible. It has become possible and the obtained welding quality has been significantly improved. FIG. 23 is a chart showing a time analysis of an operation flow by the component welding apparatus 1. As shown in FIG.
After the parts A and B are set, the magazine 31 is rotated to the welding position W and the welding is performed, and the magazine 31 is returned to the setting position S again and the parts A and the welding are completed. The time required for one cycle until the part B is taken out of the welding chamber 3 is 15 to 17 seconds, which is much shorter than the time required for the conventional part welding apparatus 100 of about one minute. ing. The above table shows one cycle time required for welding one set of parts A and B. The welding of parts A and B is performed continuously, and the operator prepares the next parts A and B. Since the welding is automatically performed within the time required for the above, the substantial tact time is about 9 to 11 seconds required for the operator to prepare the part and to take out the completed part.

Although the component welding apparatus of the present invention has been described in detail with reference to the embodiments, it is needless to say that the present invention is not limited to this, and various modifications can be made based on the technical concept of the present invention. .

For example, in the present embodiment, a component welding apparatus for setting and welding parts A and B in the vertical direction has been described. It is good also as a device which sets in a direction and welds.

Also, in this embodiment, there is provided a component welding apparatus in which welding points are shifted in the same horizontal plane to perform two weldings of four welding points P and four welding points Q. Although illustrated, depending on the type and shape of the component, the component welding device of the present invention may be a device that performs welding only once without shifting the welding point, or performs welding three or more times by shifting the welding point. It may be a device that performs the operation. Conversely, a device for welding only one point may be used. Further, the welding point may be shifted in the vertical direction to perform welding. Further, a device for seam welding may be used.

In this embodiment, a component welding apparatus in which two magazines are mounted on a rotary table has been exemplified. However, when one magazine is at the set position, the other is at the welding position. As long as there are three or more magazines attached to the rotary table of the component welding apparatus of the present invention, three or more magazines may be used.

In this embodiment, the parts A and B
The parts welding apparatus in which the set position and the welding position are respectively provided in one place is illustrated. However, depending on the type and shape of the part, the parts welding apparatus of the present invention may be configured such that different parts are provided for one set position. The apparatus may be provided with two or more welding positions for welding. Further, an apparatus having two or more set positions may be provided depending on the type and shape of the component.

In this embodiment, the rotary table 1
1 is a reciprocating rotation of 180 degrees on one side, but this is for avoiding the entanglement of the air pipe 35 of the air cylinder 36 for the magazine 31. If there is no such fear, 1 is set.
The rotation may be 360 degrees every 80 degrees.

In this embodiment, the case where the components of the electron gun for a cathode ray tube are welded is exemplified. However, the component welding apparatus of the present invention is applicable to welding of components in a wide field other than the components of the electron gun. Needless to say, it provides stable welding quality under high mass productivity.

[0050]

The component welding apparatus according to the present invention is implemented in the form described above, and has the following effects.

According to the first aspect of the present invention, when one magazine is at the set position, the other magazine is at the welding position, and the first part and the second part are set up and welded simultaneously in parallel. In addition, even when the maintenance of the magazine is required, it is only necessary to replace the magazine with a separately prepared one, and it is not necessary to stop the welding process, so that the productivity of the welding process is greatly improved. In addition, it is possible to cope with a model change of a part by a simple modification of a magazine.

According to the component welding apparatus of the second aspect, since a plurality of locations around the contact portion between the first component and the second component are simultaneously welded, deformation due to welding distortion does not occur.

According to the component welding apparatus of the third aspect, before pressurizing the first component and the second component, the annular portion receiver can be easily inserted directly below the annular portion of the first component, At the time of pressurization, the first spring supporting the first part and the second part is compressed, and the annular part descending in height position comes into contact with the annular part receiver and is supported. The pressurizing pad is pressurized with a constant force by the second spring, so that the annular part is not deformed by excessive force, and welding failure is not caused by too small force, always good welding Can be performed reliably. In addition, since the welding position is determined based on the upper surface of the annular part receiver, even if there is a variation in the height of the parts, if the height of the annular part is the same, the welding height position does not change, for example, when welding with laser To
No laser focus adjustment is required.

According to the component welding apparatus of the fourth aspect, since the positioning pins provided on the pressure pad are inserted through the second component to the first component, the first component and the second component are pressed before pressing. Parts can be easily positioned.

According to the component welding apparatus of the fifth aspect, after the first component and the second component are welded, the welding location is shifted and post-welding is performed, so that the welding strength is increased, the minimum strength is raised, and the welding is performed. The first and second parts do not cause trouble due to insufficient welding strength. According to the parts welding apparatus of claim 6, since the laser cutoff shutter is lowered between the set position and the welding position during welding, the setup by the operator at the set position and the welding at the welding position are performed in parallel. Can greatly increase the throughput of the welding process.

According to the part welding apparatus of the seventh aspect, the first part and the second part are parts constituting the grid portion of the electron gun, and the productivity of the electron gun is remarkably improved, and the production cost is dramatically reduced. Lower.

[Brief description of the drawings]

FIG. 1 is a view showing a part A, where A is a front view and B is a side view.

FIG. 2 is a view showing a part B, wherein A is a front view and B is a side view.

FIG. 3 is a front view showing a state where components A and B are combined.

FIG. 4 is a side view of the component welding apparatus according to the embodiment.

FIG. 5 is a front view of the same.

FIG. 6 is a sectional view taken along line [6]-[6] in FIG.

FIG. 7 is a side view of the welding chamber.

FIG. 8 is a front view of the same.

9 is a sectional view taken along the line [9]-[9] in FIG.

10 is a sectional view taken along the line [10]-[10] in FIG.

FIG. 11 is a front view of the magazine.

FIG. 12 is a plan view of the same.

FIG. 13 is a side view of the same.

14 is a sectional view taken along the line [14]-[14] in FIG.

FIG. 15 shows a state where the movable column in FIG. 11 is open.

FIG. 16 shows a movable column and a part A in a state where the movable column is closed.
It is a side view which shows the component B, and the difference of the height of a ring receiver and a ring is shown.

FIG. 17 is a side view showing a state where the part B is pressed after the state shown in FIG. 16, and shows a state where the ring is supported by the ring receiver.

FIG. 18 is a plan view showing a positional relationship between a ring receiver and a ring.

FIG. 19 is a plan view showing welding points between the inner peripheral edge of the ring of the component A and the outer peripheral surface of the component B.

FIG. 20 is a plan view showing rotation of a magazine on a rotary table.

FIG. 21 is a side view showing a rotating mechanism of the magazine.

FIG. 22 is a rear view of the same.

FIG. 23 is a diagram showing a flow of operation in the component welding apparatus according to the embodiment.

FIG. 24 is a plan view of a conventional component welding apparatus.

FIG. 25 is a front view showing a state where parts A and B are attached to a welding jig of a conventional parts welding apparatus and are welded by a laser.

FIG. 26 is an enlarged front view showing parts A and B attached to the welding jig.

FIG. 27 is a side view of the same.

[Explanation of symbols]

1 ... parts welding equipment, 6, 7, 8 ... air cylinder,
9 ... Laser shut-off shutter, 11 ... Rotating table, 17 ... Return spring, 21 ... Pressing pad, 23 ...
Pressing spring, 24 ... Pressing pin, 25 ... Pad holder, 31 ... Magazine, 33 ... Movable column, 34 ...
Ring receiver, 45 pedestal, 46 insertion pin, 47
... pedestal spring, 48 ... set seat plate, 53 ... fixed column, 61 ... laser irradiation end, A ... parts, B ... parts, L ... laser irradiation center line, R ... ... Ring, S ...
... Set position, W ... Weld position.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) B23K 101: 36 B23K 101: 36

Claims (7)

[Claims] 1. A component welding apparatus for welding an end of a first component and an end of a second component under pressure welding, wherein a plurality of jigs are used as a jig for setting and welding the first component and the second component. The base magazines are arranged at equal angular intervals on the rotary table, and further, when one magazine stops at the set position, the other magazine stops at the welding position, and in addition, the magazine is mounted on the rotary table. A parts welding apparatus characterized by being easily attached and detached. 2. The rotating table is rotated, the magazine is moved from the set position to the welding position, and the first part and the second part are pressurized, and laser is applied to a plurality of locations around a press-contact part. The parts welding apparatus according to claim 1, wherein the parts are irradiated simultaneously to perform welding. 3. A pressing mechanism for welding an annular portion projecting in a flange shape at an upper end of the first component and a lower end of the second component pressed against an inner peripheral edge portion of the annular portion, A set seat plate on which the first component and the second component are set via a first spring on the magazine; and a second component attached via a second spring having a larger spring constant than the first spring. Having a pressure pin applied to the upper end of the first part, the first spring is superimposed on the upper end of the second part with almost no compression,
A pressurized intervening member pressurized from above by a pressurized source, installed on the magazine, inserted immediately below the annular portion of the first component before pressurized, and then pressurized to the first part 2. The component welding apparatus according to claim 1, further comprising an annular portion receiver that receives and supports the annular portion whose height is lowered when a spring is compressed. 4. The component welding apparatus according to claim 3, wherein a positioning pin inserted from the second component to the first component is provided on the pressure interposition member. 5. The magazine is rotatably mounted on the rotary table, and the magazine is rotated in a state where the rotary table is stopped after the welding, and post welding is performed by shifting a welding position. 3. The method according to claim 2, wherein
4. The parts welding apparatus according to claim 1. 6. The laser cut-off shutter is inserted between the set position and the welding position before welding is started, and the laser cut-off shutter is pulled back when welding is completed. 3. The component welding apparatus according to item 2. 7. The component welding apparatus according to claim 1, wherein the first component and the second component are components constituting a grid portion of an electron gun.