JP3509527B2 - Laser welding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTIONFor metal catalyst carrier
That form a honeycomb cylinder of the honeycomb
Lined in the axial direction of the metal plate and corrugated plateMultiple locations
To weld the welds simultaneously,theseLaser beam on the welded part
Multiple welding torches that irradiate the
The inclination angles of the parts to be welded are different from each other.
The present invention relates to a laser welding apparatus. In the present invention, the welding torch is welded.
The tilt angle with respect to the weld is the axis of the welding torch and the welded part
The angle formed by the perpendicular to the surface. [0003] [0002] As shown in FIG.
A plurality of welded parts a to d are arranged close to each other.
Multiple welding torches Ta to Td are narrower than each other
For the welded part of the outer welding torch Ta, Td
Tilt angle θ₁Is the welding of inner welding torches Tb and Tc
Tilt angle θ₂Must be set larger
Absent. At that time, with conventional laser welding equipment,
The focal lengths f of the channels Ta to Td were set to be the same. [0004] By the way, the above-mentioned conventional ones.
Welding multiple parts to be welded with laser welding equipment
As a result, poor welding occurs in the welded part outside the inner welded part.
There is a tendency to produce easily. The inventors have investigated the cause and
As a result, the focal length of each welding torch was set the same, and the same
A laser beam is emitted from each welding torch with one output.
However, the inclination angle of each welding torch with respect to the welded part is large.
The deeper the penetration depth of the welded part
It became clear that this was caused. The present invention has been made in view of the above points.
Thus, a plurality of welding torches are inclined with respect to these welds.
Even if they are arranged at different angles, they will irradiate
Accurately welds multiple welds with a laser beam
An object of the present invention is to provide a laser welding apparatus.
The [0006] [Means for Solving the Problems] To achieve the above object
In addition, the present inventionConstructs honeycomb tube for metal catalyst carrier
Metal plates and metal wound spirally on top of each other
Line up in the axial direction of the corrugated plateWeld multiple parts at the same time
Therefore,theseMultiple laser beams that irradiate the welded part with a laser beam
Inclining the welding torch with respect to the welded part of these welding torches
Laser welding equipment arranged with different angles
The focal length of the welding torch with a large tilt angle
Is smaller than the focal length of the welding torch with a small tilt angle.
Set upParallel to the axial direction of the metal plate and the corrugated plate.
Penetration depth and spot area of welded parts at multiple locations
Was made evenIt is characterized by that. According to this feature, the tilt angle is large.
A welding torch has a focal length that is less
Each welding torch is set smaller than the welding torch.
Penetration depth of each welded part by laser beam
And the spot area can be equalized
The [0008] DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the accompanying drawings.
This will be described below based on the embodiment of the present invention shown in FIG. 1 to 13 show an embodiment of the present invention.
1 is a front view of a metal catalyst carrier, and FIG.
Fig. 3 is a cross-sectional view taken along line 2-2, Fig. 3 shows a metal plate and gold before winding.
4 is a side view of the corrugated plate, and FIG. 4 is equipped with the laser welding apparatus of the present invention.
FIG. 5 is a plan view of the honeycomb tubular body manufacturing apparatus shown in FIG.
6 is a cross-sectional view taken along line 6-6 of FIG. 4, and FIG.
FIG. 8 is an enlarged sectional view taken along line 8-8 in FIG.
9 is a cross-sectional view taken along line 9-9 of FIG. 4, and FIG. 10 is an enlarged view of the main part of FIG.
Fig. 11 is a view taken in the direction of arrow 11 in Fig. 10, and Fig. 12 is a diagram of Fig. 11.
Fig. 13 is an enlarged view of a metal plate and a corrugated metal plate.
FIG. First, in FIGS. 1 and 2, a metal catalyst carrier is used.
The body 1 is a spiral formed by superimposing a metal flat plate 2 and a metal corrugated plate 3.
Wrap it closely in the shape and weld the contact parts of both plates 2 and 3.
Honeycomb cylinder 4 and housing and holding the honeycomb cylinder 4
Therefore, a cylindrical housing that is welded to the outer peripheral surface is welded.
And the ging 5. In manufacturing the honeycomb tubular body 4,
Corresponds to one honeycomb tube 4 as shown in FIG.
A metal flat plate 2 and a metal corrugated plate 3 having a predetermined length are prepared.
The These materials are, for example, stainless steel plates. Money
The length of the metal plate 2 is set longer than that of the metal corrugated plate 3.
The The starting end of the corrugated metal plate 3 along the winding direction
The wave amplitude h gradually decreases on the terminal side.
Formed as follows. Furthermore, the peak a of the corrugated metal plate 3 and
The bottom b of the valley is formed flat. Now, an apparatus for manufacturing the honeycomb tubular body 4
This will be described with reference to FIGS. 4 to 8, a plurality of support columns.
On a rectangular machine base 8 supported horizontally by 7, 7 ...
Is a pair of rails 9, 9 extending in the long side direction.
In addition, relative to the rails 9 and 9,
A pair of left and right support walls 10₁, 10₂Is established.
The support wall 10 is also provided on the lower surface of the machine base 8.₁, 10₂Vs.
Corresponding pair of left and right small support walls 11₁, 11₂Is fixed
The On the rails 9 and 9, a movable table 12 is mounted on the right side.
Sliding through notch-shaped entrance / exit 13 provided on the retaining wall
Can be placed freely. On the bottom of the machine base 8
Piston rod of attached moving air cylinder 14
14a penetrates the long hole opening 8a at the center of the machine base 8
It is connected via an arm member 16. Thus, Air Siri
The movable table 12 is supported to the left by the contraction and extension of the
Wall 10₁Winding position A close to the wall and the supporting wall 10₁
Can be moved to the payout position B which is separated from
The This moving table 12 is positioned directly above the opening 8a of the machine base 8.
It has the opening part 12a to put. A first bearing stand 17 fixed on the machine base 8.₁But
Left support wall 10₁Arranged adjacent to the outside surface,
The first spindle 18 parallel to the rails 9 and 9₁Is supported
The This first spindle 18₁Is the left support wall 10₁
A chuck 19 is provided at the end that passes through the
The left end of the narrow winding shaft 30 is held firmly. This volume
The scraping shaft 30 winds the metal flat plate 2 and the metal corrugated plate 3.
To form the honeycomb tube 4 and close to its left end
Has slit 30a starting from the side and opening to the right end face
In this, the winding start end of the metal flat plate 2 is inserted.
It is like that. On the other hand, the movable base 12 has a right support wall 10.
₂1st bearing stand 17 located outside ₂Is fixed, this
1st spindle 18₁2nd spindle 1 lined up coaxially with
8₂Is supported. This second spindle 18₂Is that
One end of the support wall 1 on the right side at the winding position A of the movable table 12
0₂It faces the entrance and exit 13 of the
Is the right of the take-up shaft 30 at the take-up position A of the movable table 12.
A collet chuck 20 is provided that can hold the end releasably.
It is done. As shown in FIG. 8, the collet chuck 20
The outer cylinder 21 has a second spin through a plurality of guide shafts 22.
Dollar 18₂Is attached to the end face of the
In the meantime, the outer cylinder 21 is attached to the first spindle 18.₁Constant load to the side
The spring 23 that is urged by is inserted. In the outer cylinder 21
The collet claw 24 has a second spindle 18.₂The center of
An operating shaft 25 slidably penetrating is connected, which is the second
Spindle 18₂Towing air cylinder 2 attached to
6 pistons 27 are connected. Thus, collet claw 2
4 releases the winding shaft 30 by the left movement of the piston 27
The winding shaft 30 is held by the right movement.
It becomes a closed state. Furthermore, the piston 27 is moved to the right.
And the collet chuck in the tightened state while compressing the spring 23
You can apply tension to the take-up shaft 30 by moving the handle 20 to the right.
It has become. At the tip of the outer cylinder 21 of the collet chuck 20
Guides the approach to the collet claw 24 of the take-up shaft 30
A guide cylinder 29 having a tapered hole 28 is fixed. As shown in FIG. 5, the machine base 8 and the movable base 12.
Includes a first spindle 18 and a second spindle 18. ₁, 18₂Drive
A take-up shaft driving means 31 is provided. This winding
The shaft driving means 31 is an electric motor 3 installed on the machine base 8.
2 and the output shaft 32a of the electric motor 32,
Left and right support walls 10₁, 10₂1st and 2nd through
Pindol 18₁, 18₂A drive shaft 33 extending in parallel with
Left support wall 10₁Outside of the drive shaft 33 and the first spin
Dollar 18₁1st winding transmission device 34 which connects between ₁And right
Support wall 10₂Outside of the drive shaft 33 and the second spindle
Le 18₂2nd winding transmission device 34 which connects between₂Consists of
Is done. First winding transmission 34₁Fixed to the drive shaft 33
Toothed drive pulley 35₁And the first spindle 18₁
Toothed driven pulley 36 secured to₁And these pulleys 3
5₁, 36₁Cog belt 37 wrapped around₁It consists of.
The second winding transmission device 34₂Can slide on the drive shaft 33
Toothed drive pulley 35 key-coupled to₂And the second spin
Dollar 18₂Toothed driven pulley 36 secured to₂And this
Pulley 35₂, 36₂Cog belt 37 wrapped around ₂When
Drive pulley 35₁And driven pulley 3
6₁, Drive pulley 35₂And driven pulley 36₂Each gear ratio
Are set identically. Therefore, the electric motor 32
If the drive shaft 33 is rotated by the first and second winding transmissions
Device 34₁, 34 ₂The first and second spindles 1 through
8₁, 18₂Can be driven synchronously. One end of the drive shaft 33 is fixed to the machine base 8.
Bearing stand 50₁The other end is supported by the mobile platform 12
Bearing stand 50 fixed to₂2nd winding transmission 34₂of
Drive pulley 35₂The boss 35₂It is supported via a. The movable table 12 has an axis line of the take-up shaft 30.
A pair of left and right workpiece pressing members 38, 3 facing each other along
8 is fixed so as to straddle the opening 12a. these
The distance between the work pressing members 38, 38 is the winding.
The metal flat plate 2 and the metal corrugated plate 3 wound up by the shaft 30
It is set to be able to hold both ends of. Both workpieces pressed
The support members 38 and 38 are moved by the movable table 12 to the payout position B.
When moved, the formed honeycomb cylinder 4 is wound on the winding shaft 3.
The payout starts from 0 (see Fig. 7).
A bearing that slides on the winding shaft 30 and supports the right end thereof.
The member 39 is fixed to the movable table 12. Below the machine base 8 is a moving base 12 for pushing the workpiece.
Even when the member 38 is moved to the dispensing position B together with the members 38, 38.
And the opening 8a of the machine base 8 is discharged from the take-up shaft 30.
And the honeycomb falling through the opening 12a of the movable table 12
A container 40 that houses the cylindrical body 4 is installed. As shown in FIGS. 6 and 9, the winding shaft 3
Above 0 is a metal flat plate that supplies the metal plate 2 to the shaft 30.
A plate supply device 42 is provided, which is provided on the left and right support walls 1.
0₁, 10₂Is supported by This metal plate feeder
Reference numeral 42 denotes a driving roller 4 driven by an electric motor 43.
4 and a follower roller 45 that sandwiches the metal flat plate 2 in cooperation with it.
By operating the electric motor 43, the metal
The flat plate 2 can be supplied to the winding shaft 30. Further, below the winding shaft 30, the shaft 30 is provided.
To supply the corrugated sheet 3 to the machine 8 through the opening 8a of the machine base 8
A corrugated plate feeding device 46 is provided, which is arranged on the left and right small branches.
Retaining wall 11₁, 11₂Is supported by This metal corrugated sheet
The driving device 46 is also driven by an electric motor 48.
-Lor 49 and a driven low which sandwiches the metal plate 2 in cooperation with it
49 by operating the electric motor 47.
The metal corrugated plate 3 can be supplied to the winding shaft 30.
The As shown in FIGS. 9 and 10, the winding shaft
The winding shaft 30 is separated from a vertical plane including 30 axis lines.
First and second support plates 51 on both sides₁, 51₂Is a reverse letter
It is arranged. These support plates 51₁, 51₂What
The left and right support walls 10₁, 10₂Two horizontally
It is fixed to the mounting shafts 52, 52. First and second support plates
51₁, 51₂Above, the first and second moving plates 53₁, 5
3₂Slides in the forward and backward direction with respect to the take-up shaft 30
Mounted freely. The first moving plate 53₁The take-up shaft 3
Press the center in the width direction of the outer peripheral surface of the metal corrugated sheet 3 wound up to zero.
Narrow first pressing roller 54 that can be pressed₁And outside of corrugated metal plate 3
First auxiliary pressing roller 55 capable of pressing the circumferential surface over the entire width
₁And welding the contact portion between the valley of the metal corrugated plate 3 and the metal flat plate 2
The first laser welding apparatus 56 according to the present invention₁And provided
And the first moving plate 53₁The first attachment to move the machine forward and backward
Air cylinder 57 ₁Is the first support plate 51.₁Mounted on
It is. As shown in FIGS. 10 and 12, the first press
Roller 54₁Is a metal wave wound around the winding shaft 30
It has teeth on the outer periphery that mesh with the valleys and peaks of the plate 3
First moving plate 53₁Bracket 59 standing up from₁In
It is pivotally supported. First auxiliary pressing roller 55₁Well, that bracket
59₁The first pressing roller 54 is supported by the shaft.₁Gold
The outer peripheral surface of the metal corrugated sheet 3 immediately before the direction of winding the corrugated sheet 3
It is arranged to press. First laser welding apparatus 56₁Is the first moving plate
53₁The fixed holder 60 of₁Multiple pieces held in
Welding torch 61₁, 61₁... (4 in the example shown)
These welding torches 61₁, 61₁... irradiation
The beam is the first pressing roller 54₁Multiple welds on both sides
a to d (as shown in FIG. 12, a total of four locations in the illustrated example)
Focusing on the contact part between the valley of the metal corrugated plate 3 and the metal flat plate 2
And spot welding. These welds
-61₁, 61₁... indicates the laser irradiation direction line L₁But
Winding shaft 30 and first pressing roller 54₁Including both axes
Arranged so as to pass on a flat surface. The distance between the four welded parts a to d
Is smaller than the distance between the four welding torches 61a to 61d.
For this reason, the outer welding torch 61a,
Tilt angle θ with respect to the welded part of 61d₂The inner weld
Inclination angle θ with respect to the welded portion of the torches 61b and 61c₁
It is set larger. For example, θ₁= 5 °, θ₂= 2
Set to 5 °. At the same time, the outer welding torch 6
Focal length f of 1a and 61d₂The inner welding torch 61
b, 61c focal length f₁Set smaller. example
F₁= 100 mm, f₂= 70 mm is set. Also, the second moving plate 53₂The take-up shaft
30 in the width direction central portion of the outer peripheral surface of the metal flat plate 2 wound up by 30
A narrow second pressing roller 54 that can be pressed.₂And metal plate 2
Second auxiliary pressing roller 5 capable of pressing the outer peripheral surface over the entire width
5₂And the contact portion between the crest of the metal corrugated plate 3 and the metal flat plate 2 is melted.
The second laser welding apparatus 56 according to the present invention in contact with₂And set
And the second moving plate 53₂Second to move forward and backward
Energizing air cylinder 57₂Is the second support plate 51.₂Mounted on
It is done. Second pressing roller 54₂The second moving plate 53
₂Bracket 59 standing up from₂Is pivotally supported. Second supplement
Auxiliary pressing roller 55₂The bracket 59₂Pivoted on
The second pressing roller 54₂How to wind up two flat metal plates
Immediately before the direction, the metal plate 2 is arranged so as to press the outer peripheral surface.
Placed. Second laser welding apparatus 56₂The second moving plate
53₂The fixed holder 60 of₂Multiple pieces held in
With welding torches 61a to 61d (four in the illustrated example)
These irradiation torches 61a to 61d are irradiated with laser beams.
The second pressing roller 54₂Metal waves in place on both sides of the
Focus on the contact between the peak of the plate 3 and the metal plate 2
Welding. These welding torches 61
a to 61d are laser irradiation direction lines L₂Winding shaft
30 and the second pressing roller 54₂On a plane containing both axes
It is arranged to pass. These welding torches 61a to 61
The arrangement of d and the focal length are determined by the first laser welding device 56.₁of
The same as the welding torches 61a to 61d. Thus, the first laser welding apparatus 56₁And the second
2 laser welding equipment 56₂Is the above laser irradiation
Direction line L₁, L₂Around the take-up shaft 30
It arrange | positions so that the V shape which opens mutually may be made | formed. Up
Laser irradiation direction line L₁, L ₂The depression angle α of
In this case, it is set to approximately 120 °. In FIG. 10, the first moving plate 53 is shown.₁In
Gear type first pressing roller 54₁Detect peaks and valleys
A position sensor 63 is attached. This sensor 63 is the first
Press roller 54₁Is piled up on the take-up shaft 30
When engaged with the valley of the corrugated metal plate 3, the first pressing roller 5
4₁Welding control unit 6 by detecting other valleys or peaks
4 outputs the welding signal. The welding control unit 64 is
The first laser immediately upon receiving the welding signal from the position sensor 63
Welding device 56₁When the welding signal is received
When the take-up shaft 30 is rotated by the following predetermined angle β
Second laser welding device 56₂Is supposed to work
The Β = α + γ (1) α: Laser irradiation direction line L₁, L₂Horn of γ: between two adjacent signals output by the position sensor 63
The angle of half of the rotation angle of the corresponding winding shaft 30 The rotation angle of the take-up shaft 30 is determined by the first bearing stand 17.₁
It is detected by the encoder 65 provided in. Next, the operation of this embodiment will be described.
The First, when the moving air cylinder 14 is actuated.
The movable table 12 is held at the winding position A. At this time,
The right end of the take-up shaft 30 enters the collet claw 24.
Therefore, the piston 27 of the traction air cylinder 26 is moved to the right.
Then, the collet claw 24 is closed by towing the operating rod 25
The right end portion of the winding shaft 30 is held. Piss
When the ton 27 is moved to the right, the collet chuck 20 is moved to the spring 2
3 is pulled to the right while compressing 3 and
Apply constant tension. As a result, the thin winding shaft 30
However, since it will have a large flexural rigidity during rotation,
Demonstrate core deflection by exerting great drag against lateral load
Winding of the metal flat plate 2 and the metal corrugated plate 3 to be described later
It will be possible to take accurately. After this, first, the flat metal plate supply device 4
The metal flat plate 2 is sent to the take-up shaft 30 by 2 and FIG.
Inserted into the slit 30a of the shaft 30 as shown in (1)
To do. At that time, the starting end of the metal flat plate 2 is outside the slit 30a.
A predetermined length, for example, a length corresponding to a substantially half circumference of the winding shaft 30
Make it protrude. Next, the winding shaft drive means 31 is electrically operated.
By operating the motor 32, the first and second spindles 1
8₁, 18₂The entire take-up shaft 30 by rotating synchronously.
Rotate 1.5 to several times, and out of the slit 30a
The metal flat plate 2 is wound together with the protruding portion 2a of FIG.
(See (3)). Next, as shown in FIG.
2 Energizing air cylinder 57₁, 57 ₂The predetermined air pressure
Accordingly, the first and second moving plates 53 are extended.₁, 53₂
The first and second pressing rollers 54₁, 54₂The
The metal plate 2 is brought into pressure contact with the outer peripheral surface, and the second
The welding device 56₂Is manually operated, welding torch 61a ~
The metal plate 2 is brought into contact with each other by the 61d irradiation laser beam.
Spot weld the contact parts at appropriate intervals. Its welding
Point p₁It shows with. The winding shaft 30 is rotated approximately 1.5 times or several times.
After rolling, this time the metal corrugated sheet is fed by the metal corrugated sheet feeder 46.
3 is sent to the take-up shaft 30, and the starting end of the metal plate 2
On the outer circumferential surface of the portion wound around the winding shaft 30
Wet welding (welding point p in FIG. 13 (4)₂reference). this
The first laser welding device 56 is used for welding.₁By manual operation of
Lined by the irradiated laser beam of the contact torch 61a-61d
Yeah. In this way, the progress of the rotation of the take-up shaft 30 in the future.
Along the line, the starting end of the metal corrugated plate 3 is wound up by the metal flat plate 2.
The portion wound around the rotary shaft 30 and the portion to be wound from now on
Can be securely sandwiched between parts
The As the winding shaft 30 rotates, the metal corrugated plate 2
The first pressing roller 54 in the first valley of ₁The mountain part of engaged
The first and second angles from the stage are the welding device 56.₁, 56₂The
The welding control unit 64 is put into an operating state for automatic control.
The Thus, the position sensor 63 is connected to the metal corrugated plate 3.
Each time the valley contacts the metal flat plate 2, the state is first pressed.
Roller 54₁The welding signal is detected via the welding control unit.
The unit 64 outputs the first angle to the first angle.
Welding device 56₁, Welding torches 61a to 61
The trough of the corrugated metal plate 3 and the metal flat surface are irradiated by the irradiation laser beam d.
The contact part with the plate 2 is p₂Spot weld as shown in. The position sensor 63 outputs a welding signal.
When the winding shaft 30 rotates by the angle β from the point
According to equation (1), the crest of the metal corrugated plate 3 is in contact with the metal flat plate 2.
You will reach a point. At this time, the welding control unit
64 calculates this from the signal from the encoder 65.
Second laser welding device 56₂The welding torch 6
The corrugated metal plate 3 is irradiated with the irradiation laser beams 1a to 61d.
The contact portion between the peak and the metal flat plate 2 is shown in FIG._ThreeIndicated by
Spot welding is performed. Moreover, in this case, as described above, the metal wave
The top a and the bottom b of the valley are formed flat on the top of the plate 3.
Therefore, the top part a and the bottom part b are relatively wide with the metal flat plate 2.
Contact with a large area, each welding torch 61a-6
Even if there is a slight shift in the laser beam irradiation point of 1d,
The welding of the top part a and the bottom part b of the metal plate 2 and the metal flat plate 2 is performed reliably.
be able to. Thus, the trough of the metal corrugated plate 3 becomes the metal flat plate 2.
One position sensor 63 for detecting contact with the winding, and winding
One encoder for detecting the rotation angle of the scraping shaft 30 is also an encoder 65.
Thus, the first and second laser welding apparatuses 56₁, 56₂
Of the corrugated portion of the metal corrugated plate 3 and the metal flat plate 2
Contact portion and contact between metal corrugated plate 3 and metal flat plate 2
The part can be easily and accurately welded. Moreover, the first and second moving plates 53₁, 53
₂The first and second auxiliary pressing rollers 54 provided in the₁, 5
4₂The first and second pressing rollers 54₁, 54₂Of the volume
Just before the direction of rotation R of the scraping shaft 30, that is, immediately before the welding point
Each outer peripheral surface of the corrugated plate 3 and the metal plate 2 is spread over its entire width.
The metal corrugated sheet 3 and the gold at each welding point.
Ensure good adhesion of the metal plates and their laser melting.
The contact can be ensured. In addition, a pair of left and right workpieces on the movable table 12 are pressed.
Even the members 38, 38 were wound on the winding shaft 30.
Always hold both ends of the corrugated metal plate 3 and the metal flat plate 2
So that their side edges can be neatly aligned and flushed,
The finishing process after molding can be omitted. With winding
If the rotation of the take-up shaft 30 is continued, the metal flat plate 2 and the metal wave
To wind up densely in a spiral manner
it can. Metal corrugated plate 3 and metal by winding shaft 30
As winding of the flat plate 2 progresses, each diameter
Although increasing, the first and second pressing rollers 54₁, 54
₂Is a constant pressure on the outer peripheral surface of the metal corrugated plate 3 and the metal flat plate 2.
1st and 2nd movements while maintaining pressure contact
Board 53₁, 53₂With the first and second energizing air
A cylinder 57₁, 57₂Shrink. The first
And the second moving plate 53₁, 53₂The first and second lasers
Welding device 56₁, 56₂Is provided, so
The first laser welding device 56 also depends on the increase in the diameter of the plate 2.₁
Of the irradiation laser beam from the welding torches 61a to 61d
The focal point is a specified contact portion between the valley of the metal corrugated plate 3 and the metal flat plate 2.
In addition, the second laser welding apparatus 56₂Welding torch 61a
The focus of the irradiation laser beam from ˜61d
Continue to hold each at the specified contact between the ridge and the flat metal plate 2
Therefore, the welds of these contacts are welded.
I can. The inclination of the welding torch with respect to the welded part
The relationship between the welding angle and focal length and the welded state of the welded part
This will be described with reference to FIGS. FIG. 14 shows the focal length of the welding torch as 70 m.
welding torch when set to m and 100 mm
Tilt angle of weld to welded part and penetration depth of welded part
FIG. 15 shows the focal length of the welding torch as 7
When set to 0 mm and 100 mm,
Inclination angle of weld to welded part and spot of welded part
It shows the relationship with the area. As is clear from these, melting of the welded part
The depth of penetration depends on the inclination angle of the welding torch to the welded part.
Decreases with increase, and focal length of welding torch increases
It decreases as you do. On the other hand, the spot area is the welding torch.
As the tilt angle of the welded part increases,
It increases as the focal length of the welding torch increases. There
The focal length of the welding torch is 70mm and 100mm.
If set, the weld penetration depth and spot area
Investigate the tilt angle of each welding torch with equal
For example, 5 ° for a welding torch with a focal length of 100 mm,
For a welding torch with a focal length of 70 mm, the angle is 25 °. this
Based on the first and second laser welding devices 56₁, 5
6₂Is constructed, that is, the inner two welding torches
61b and 61c are focal lengths f₁Is 100mm, covered
Tilt angle θ with respect to welds b and c₁Is set to 5 °
The On the other hand, the outer two welding torches 61a and 61d are
Focal length f₂Is 70mm, inclined with respect to welded parts a and d
Angle θ₂It is set to 25 °. Thus, a plurality of welding torches 61a to 61d.
A laser beam is irradiated to a plurality of welded parts a to d corresponding to
If so, the penetration depth and spot of these welded parts a to d
To achieve good welding in each case
be able to. Thus, it approximates a cylinder on the take-up shaft 30.
The formed honeycomb cylinder 4 is formed, and after forming, the first and second
Energizing air cylinder 57₁, 57₂The contraction is activated and the second
1 and second pressing roller 54₁, 54₂The honeycomb cylinder 4
The piston of the traction air cylinder 26
27 to the left to open the collet chuck 20
The right end portion of the winding shaft 30 is made free. Then move
Moves as shown in Fig. 7 by the operation of the air cylinder 14
If the table 12 is moved to the payout position B, the moving table 12
The left work pressing member 38 provided in the
Slide the body 4 to the right along the take-up shaft 30 and its right end
Pay out from the department. Honeycomb paid out from the take-up shaft 30
The cylindrical body 4 has a pair of work pressing members 38, 3 by its own weight.
It falls from between 8 and is accommodated in the container 40. like this
In addition, the formed honeycomb tubular body 4 is separated from the winding position A.
From the take-up shaft 30 at a specially provided dispensing position B
Since it is paid out, it is arranged around the winding position A.
Metal corrugated plate supply device 46, metal flat plate supply device 42, first,
Second laser welding device 56₁, 56₂Interference with various devices such as
The honeycomb tubular body 4 can be discharged without being
The The first and second laser welding apparatuses 5
6₁, 56₂Are the welding torches 61a to 61d;
Laser irradiation direction line L of ~ 61d₁, L₂Facing upward
Since they are arranged so as to open in a V shape, each welding toe
The laser beams from 61a to 61d are always under the eyes of the operator.
The operator's eyes from the irradiation laser
Can be protected. Also, the winding shaft 30 is welded
If there is no object, the first and second laser welding equipment will be mistaken
56₁, 56₂Even if one or both of them are activated, the laser
The beam will not irradiate the other welding torch.
These damages can be avoided. The present invention is not limited to the above embodiment.
There are various design changes without departing from the scope of the invention.
Is possible. For example, each laser welding device 56₁, 56₂
The number of welding torches is limited to 4RanaYes. [0056] As described above, according to the present invention,Metal touch
Make up the honeycomb cylinder for the medium carrier, spiral on top of each other
Lined in the axial direction of metal flat plate and corrugated metal plateMultiple
In order to weld the welded parts at the same time,theseFor welded parts
Multiple welding torches that irradiate laser beams
Different angles of inclination of the welding torch with respect to the welded part
In the laser welding apparatus arranged by
The focal length of a welding torch with large
Smaller than the focal length of the welding torchThe metal
Of welded parts at multiple locations in the axial direction of flat plate and corrugated metal sheet
Made the penetration depth and spot area uniform.
ByLighting of multiple welding torches with different inclination angles
Metal plates and corrugated plates depending on the laser beam
ofThe penetration depth and spot area of the welded part
Evenly, each welded part can be welded accurately.
Therefore, it can greatly contribute to the reduction of welding defects.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a metal catalyst carrier. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is a side view of a metal flat plate and a metal corrugated plate before winding. FIG. 4 is a plan view of a honeycomb tube manufacturing apparatus provided with the laser welding apparatus of the present invention. 5 is a plan view of the main part of FIG. 4; 6 is a cross-sectional view taken along line 6-6 in FIG. 4; FIG. 7 is an operation explanatory diagram corresponding to FIG. 6; 8 is an enlarged sectional view taken along line 8-8 in FIG. 6; 9 is a sectional view taken along line 9-9 of FIG. 10 is an enlarged view of the main part of FIG. 9; 11 is a view taken in the direction of arrow 11 in FIG. 10; 12 is an enlarged view of a main part of FIG. FIG. 13 is an explanatory diagram of a winding action of a metal flat plate and a metal corrugated plate. FIG. 14 is a diagram showing the relationship between the inclination angle of the welding torch with respect to the welded portion and the penetration depth of the welded portion. FIG. 15 is a diagram illustrating a relationship between an inclination angle of a welding torch with respect to a welded portion and a spot area of the welded portion. FIG. 16 is a schematic diagram of a conventional laser welding apparatus. [Description of Symbols] 1 ... Metal catalyst carrier 2 ... Metal flat plate 3 ... Metal corrugated plate 4 ... Honeycomb cylindrical bodies 56 ₁ , 56 ₂ ... Laser welding device 61a, 61d · · · tilt angle is large welding torch 61b, 61c · · · inclination angle is smaller welding torch to d · · · welded portion f ₁ · · · larger focal length f ₂ · · · small focal distance

─────────────────────────────────────────────────── ─── Continuation of front page (56) References Japanese Patent Laid-Open No. 2-175071 (JP, A) Japanese Patent Publication No. Sho 53-41104 (JP, B2) Actual Public Heisei 2-331256 (JP, Y2) (58) Field (Int.Cl. ⁷ , DB name) B01J 35/04 B23K 26/00-26/42 F01N 3/28

Claims (1)

(57) [Claims] [Claim 1] Honeycomb cylinder for metal catalyst carrier (1)
(4), metal wound spirally on top of each other
In order to weld the flat plate (2) and the weld of the plurality of positions arranged in the axial direction of the metal corrugated sheet (3) (to d) at the same time, a plurality of irradiating a laser beam thereto welded portion (to d) Welding torches (61a to 61d) are connected to these welding torches (61a
In the laser welding apparatus in which the inclination angles of the welding torches (ad) to 61d) are different from each other, the focal length (f ₂ ) of the welding torch (61a, 61d) having the large inclination angle is: The axial direction of the metal flat plate (2) and the metal corrugated plate (3) is set smaller than the focal length (f ₁ ) of the welding torch (61b, 61c) having a small inclination angle.
Penetration depth of welded parts (a to d) at a plurality of locations in a row
Laser welding equipment characterized by uniform spot area .