JP3481153B2 - Weld fume collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] [0001] The present invention relates to a laser welding machine,
To collect welding fume generated by the laser welding machine
Fume collector to which a wet dust collector is connected
You. [0002] 2. Description of the Related Art Conventionally, such an apparatus is disclosed in, for example,
It is already known from -292970 and the like. [0003] In the above-mentioned conventional apparatus,
Guiding gas containing welding fume generated by laser welding machine
A conduit is connected to the treatment tank and introduced into the treatment tank from the conduit
Gas flows under the processing solution in the processing tank,
We are trying to remove welding fume from. By the way, the hue generated by a laser welding machine is
Fumes generated by YAG laser welding machines
Laser welding of ferrous materials
In the case of nautical, fumes are highly ignitable, so wet dust collection
It is necessary to pay attention to ignition on the machine side. However, the above
The conventional one focuses on the ignitability of such fumes.
The welding fume is attached to the inner surface of the conduit.
May ignite on wearing, especially light weight and cost
The conduit is made of synthetic resin for reasons such as reduction.
If so, the conduits may burn.
You. In the conventional wet dust collector, the inside of the
Compressed air is blown from below into the processing liquid stored in the
Weld gas containing welding fume into the processing solution
The fume collection efficiency is to be increased. Properly
The fume that settles in the processing solution is installed in the lower part of the processing tank.
So that it descends along the inclined net plate and accumulates in the tank.
Compressed air from below passes through the inclined mesh plate
Of the welding fume that has become granular
Sedimentation is impeded and the welding fumes are dispersed and lifted.
We will collect the welding fume with the treated liquid
It is difficult to say that the collection efficiency is high. [0006] The present invention has been made in view of such circumstances.
The fumes generated by the laser welding machine
To prevent ignition on the wet dust collector side
Welding fume that can increase the fume collection efficiency
It is an object to provide a collecting device. [0007] [MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
The present invention relates to a laser welding machine,
Wet dust collector for collecting welding fume
Welded dust collectors are used in
Inclined pipe part that becomes lower as it separates from theDuring ~
In the middleThe upstream end is connected to the laser welding machine
Conduit and a plurality of sprays provided in the inclined tube portion
Vessels,Guides the processing liquid sprayed from each sprayerOf said conduit
The downstream end is connected and gas from the conduit dives
Tank in which the processing liquid is stored as described above, and the processing liquid
Of processing liquid toward the gas flow flowing upward from the liquid level
In this way, a plurality of nozzles fixedly arranged in the treatment tank
And the processing liquid sucked from the bottom of the processing tank.
A circulation pump for supplying the atomizer and the nozzle, and the circulation pump
Between the pump and the atomizer and nozzle and the circulation
Provided between the ring pump and the processing tank.
And a filter having the following characteristics. According to such a configuration, a laser welding machine can be used.
A conduit that guides gas containing generated welding fumes to the treatment tank
Inclined section of the middleThat multiple sprayers are provided inside
As a result, some of the welding fume in the gas flowing through the conduit
The processing liquid sprayed from each sprayer is removed and theInside
It will flow to the treatment tank side, and welding fumes will be
Avoid sticking as much as possible, and make sure that the conduit is made of synthetic resin.
If possible, prevent fires from occurring as much as possible.
it can. In addition, gas is generated by contact with the processing liquid in the processing tank.
Welding fumes that have been removed from the
In addition, the welding heat contained in the processing liquid flowing from the conduit side
Volume is filtered by the filter during the circulation of the processing solution by the circulation pump.
In the treatment liquid that comes into contact with the welding fume
It is extremely important that the particulate welding fume
Force can be avoided, increasing the fume collection efficiency
Can be [0009] Embodiments of the present invention will be described below.
A description will be given based on one embodiment of the present invention shown in the accompanying drawings. 1 to 10 show one embodiment of the present invention.
Fig. 1 shows the overall structure of a laser welding machine and a wet dust collector.
Side view, FIG. 2 is a schematic vertical sectional view of a main part of the wet dust collector, and FIG.
FIG. 4 is an enlarged longitudinal sectional view showing a part of the first dust collecting portion, and FIG.
FIG. 5 is an enlarged vertical sectional view of the vessel, FIG.
Is a flow chart showing the processing procedure in the welding machine control unit.
FIG. 7 shows an abnormality processing procedure in the welding machine control unit.
Flow chart, FIG. 8 shows the processing procedure in the dust collector control unit.
FIG. 9 shows a dust collector control unit.
10 is a flowchart showing an abnormality processing procedure, and FIG. 10 is a dust collector.
5 is a flowchart showing a stop processing procedure in the control unit.
is there. First, in FIG. 1, a laser welding machine 1 includes:
The welding fume generated by the laser welding machine 1 is collected.
The wet dust collector 2 is connected to the
Is composed of first, second and third dust collecting sections 3, 4, 5
You. In the laser welding machine 1, a nitrogen gas atmosphere is used.
Laser welding is performed in an atmosphere.
Nitrogen gas containing welding fumes generated by the machine 1
It is discharged to the outside through the dust collector 2, but the first of the wet dust collector 2
-The wet dust collection process is executed in each of the third dust collection units 3, 4, and 5
Is done. In FIG. 2, a second dust collecting section 4 includes a processing tank 6.
The processing tank 6 has both ends closed, for example, a circle.
It is formed in a tubular shape, and stands upright on a floor surface 7 (see FIG. 1).
A support box 8 opening downward is fixed to the upper part of the processing tank 6.
The center of the upper surface of the support box 8 is provided with a turbo fan 9.
Is fixed. In the support box 8, as it goes downward,
A tapered mechanical filter 10 with a small diameter is attached.
The mesh of the mechanical filter 10
The diameter is set to, for example, 1.0 μm. Support box 8
Between the mechanical filter 10 and the mechanical filter.
A purification chamber 11 facing the upper surface of the filter 10 is formed.
This purification chamber 11 communicates with the suction port of the turbo fan 9.
It is. In the purifying chamber 11, a turbo fan 9 is sucked.
A water jet nozzle 12 for jetting water toward the mouth is fixedly arranged.
It is. The water jet nozzle 12 is connected to the outside of the treatment tank 6.
Water extending to the water supply and connected to a water supply source (not shown)
The pipe 13 has a water supply valve which is opened by manual operation of an operator.
14, or a solenoid valve that does not rely on manual operation
Water supply valve is provided, and when the water supply valve 14 is opened,
Water is sprayed from the water spray nozzle 12 toward the turbo fan 9 side.
Will be fired. In the center of the lower part of the support box 8, the first dust collecting part 3
The gas introduction box 15 into which these gases are introduced is fixed.
Tapered guide part with a smaller diameter as it goes upward
Material 16 is located below the lower end opening of gas introduction box 15
In this way, it is fixedly disposed in the processing tank 6. On the other hand,
A processing liquid is stored in a lower part of the processing tank 6, and the processing liquid is stored in the lower part.
Around the gas introduction box 15 above the liquid level of
An unpurified chamber 17 facing the lower surface of the cull filter 10 is formed.
Is done. One end of a suction pipe 18 is in contact with the bottom of the processing tank 6.
The other end of the suction pipe 18 is a suction port of a circulation pump 19
Connected to. The discharge port of the circulation pump 19 has a pair of
Connected to one end of the discharge pipe 21 via the filters 20, 20.
The other end of the discharge pipe 21 protrudes into the processing tank 6.
You. Thus, the pair of filters 20, 20 are normally
Uses only one filter 20 and one filter 20
Use the other filter 20 during maintenance
Are connected in parallel, and both filters 20 and 2 are connected in parallel.
0 is connected to the circulation pump 19 through the switching valve 22.
The other ends of the two filters 20, 20 are connected via a switching valve 23.
It is connected to one end of the discharge pipe 21. In the processing tank 6, in the unpurified chamber 17
Is a ring-shaped distribution pipe 24 surrounding the gas introduction box 15.
And the other end of the discharge pipe 21 is connected to the distribution pipe 24.
Is connected. Moreover, the interval in the circumferential direction of the distribution pipe 24 is increased.
After immersing the processing solution in the multiple locations,
That ejects the processing liquid toward the gas flowing upward from the surface
The chirps 25, 25 ... are attached with the ejection direction facing outward.
You. These nozzles 25, 25...
The minimum mist diameter is, for example, the mesh diameter of the filter 20.
1.0 μm or less, for example, 0.5 to 1.0 μm
Is set as follows. In such a second dust collecting section 4, a gas introduction box is provided.
Gas containing welding fumes introduced into 15
Spread out from the lower end opening of the box 15 by the guide member 16
After being guided downward so as to spread to the unpurified chamber 17 side
Flows upside down toward the gas introduction box 15
Gas containing welding fume when flowing into the unpurified chamber 17
A gas that dives through the processing liquid and reverses and flows upward
The processing liquid is ejected from each nozzle 25, 25,.
You. That is, the processing liquid is dipped, and each nozzle 2
The processing liquid is ejected from 5, 25.
Welding fumes are removed by contact with the processing liquid.
You. The gas is not removed even by contact with this processing solution.
The accompanying welding fume is removed by the mechanical filter 10.
Gas removed through the mechanical filter 10
Is sucked into the turbofan 9 via the purification chamber 11. The above-mentioned processing solution contains a surfactant and a flocculant.
At least one of which is mixed with water,
When a surfactant is included, the surfactant
Fumes become easier to mix with water,
Effective bubbling will occur, and
Of the processing liquid from the nozzles 25, 25,.
Contact fumes are collected more effectively. As the coagulant, polyacrylamide is used.
System, sodium polyacrylate, polyvinylpyridine,
Use of vinyl imidaline polymer and guar gum
And zeolite, activated carbon, aluminum hydroxide
, Activated clay, kaolin clay, calcium carbonate, etc.
So-called nucleating agent, poly aluminum chloride, aluminum sulfate
, Sodium aluminate and polyaluminum chloride
It is also possible to use a so-called fixing agent such as
is there. When the flocculant is mixed with water,
In this case, the action of the flocculant causes the welding fume to
Large enough to effectively aggregate in water and sediment in the processing solution
Therefore, the granular welding fusing by the filter 20 is performed.
The removal of the system is effective. At the bottom of the processing tank 6, a sink in the processing liquid
The magnet 26 is installed detachably,
This magnet 26 is made of iron-based welding fume.
For example, relatively large particles of several μm or more are absorbed in the processing solution.
To capture and capture the welding fume in the wet dust collector 2
It works to increase the rate. Referring also to FIG. 3, the first dust collecting section 3
A gas introduction box 15 of the processing tank 6 in the second dust collecting section 4;
A conduit 28 connecting between the laser welding machines 1 and one inside the conduit 28
And a plurality of sprayers 29, 29,. The conduit 28 has a plurality of pipes flanged together.
This conduit 28 has at least
In the part on the processing tank 6 side from the middle part, the processing tank 6 side
It is inclined so that it becomes lower toward
You. That is, the conduit 28 is connected to the laser welding machine 1
A rising pipe portion 28a that rises upward, and a substantially open bottom
It is formed in a U-shape, and one end is above the rising pipe portion 28a.
A U-shaped tube portion 28b connected to the end;
One end is connected to the other end to extend to the processing tank 6 side and to be processed.
The first inclination which is inclined so as to become lower as approaching the bath 6
One end is connected to the other end of the inclined tube portion 28c and the first inclined tube portion 28c.
Then, it extends to the processing tank 6 side and approaches the processing tank 6 side.
Angle of the first inclined tube portion 28c so as to become lower as
A second inclined tube portion 28d inclined at a larger inclination angle,
One end is connected to the other end of the second inclined tube portion 28d and extends horizontally.
And the other end is connected to the gas introduction box 15 in the processing tank 6.
And a horizontal tube portion 28e. Within the first inclined pipe portion 28c of the conduit 28
Is provided with a fixedly arranged conduit 30 for guiding the treatment liquid.
One end of the conduit 30 is connected to a discharge port of the circulation pump 19 by a filter.
Branched from a discharge pipe 21 connected via 20, 20
It is connected to the branch pipe 31 and an electromagnetic on-off valve 33 is installed.
Air conduit 32 which is connected to the
Connected to compressed air source not shown. That is, the pipe 3
0, the operation of the circulation pump 19 and the solenoid on-off valve 33
Process liquid and compressed air are introduced when the valve is opened
At a plurality of locations spaced apart in the longitudinal direction of the pipeline 30
With the compressed air from the attached sprayers 29, 29 ...
The processing liquid will be sprayed. Moreover, the first inclined pipe section 2
8c indicates whether the spray state from each of the sprayers 29, 29.
For example, a transparent polyvinyl chloride
It is desirable to be made of a simple pipe. In FIG. 4, the distance in the longitudinal direction of the pipeline 30 is shown.
Connection pipes 34 are screwed into the lower part of the
One end of a bent tube 35 is fitted into each connection tube 34.
If they are, they are fixed. These bent tubes 35 are a first inclined tube.
The other end is located on the downstream side along the gas flow direction 36 in the portion 28c.
Each bent tube is bent in a substantially L-shape so as to be arranged.
One end of a support ring 37 is fitted and fixed to the other end of 35.
It is. The atomizers 29 are used to process compressed air.
Spraying the liquid toward the downstream side along the flow direction 36
It is detachably attached to each support ring 37.
And a body 38 screwed to the support ring 37.
Attached to 38 with adjustable axial advance / retreat position
A support rod 39 and a movable body supported by the support rod 39
And a body 40. The inner surface of the other end of the support ring 37 has a female screw 4
1 is provided, and the body 38 is screwed into the female screw 41.
Cylindrical portion 38a having an external thread 42 on its outer surface;
38a and coaxially connected to one end of the support ring 37.
The bottomed cylindrical portion 38b protruding into the
From the other end of the cylindrical portion 38a so as to face the end face
With integral flange portion 38c extending radially outward
And the bottomed cylindrical portion 38b includes a bent tube 35 and a connecting tube.
An annular chamber 43 communicating with the pipe line 30 via the
Outer diameter of the cylindrical portion 38a to be formed between the inner surface of the
It is formed so as to have a smaller outer diameter. And yes
The front cylindrical portion 38b is provided with a plurality of portions spaced apart in the circumferential direction.
There are provided communication holes 44, 44 ... which communicate with the annular chamber 43.
You. The support rod 39 has a male at one end in the axial direction.
It has a screw portion 39a, and the male screw portion 39a
Is the central portion of the closed end of the bottomed cylindrical portion 38b of the vessel 38.
Of the male screw portion 39a from the bottomed cylindrical portion 38b.
A nut 45 and a lock nut 46 are screwed into the protrusion.
It is. The other end of the support rod 39 has an enlarged diameter head 39b.
Are provided, and a container body in the axial direction of the support rod 39 is provided.
The position of the enlarged diameter head 39b with respect to 38 is
Change the screwing position of nut 45 and lock nut 46
It is adjustable by making The movable body 40 is connected to the other end of the support rod 39.
The body 38 can be inserted while allowing relative displacement in the axial direction.
The cylindrical part 40a inserted into the cylindrical part 38a and the body 38
The circle so as to face the outer end surface of the flange portion 38c in the circle.
A flange portion 40b extending from the outer end of the cylindrical portion 40a;
The movable body 40 is an outer end of the cylindrical portion 40a.
Is in contact with the enlarged head 39b of the support rod 39,
Between the position where the flange 40b abuts against the flange 38c of the body 38.
It is possible to move axially between them. In such a sprayer 29, compressed air is mixed.
The treated liquid flows from the pipe 30 to the connecting pipe 34 and the bent pipe 3.
5, through the annular chamber 43 and the respective communication holes 44, 44,.
When supplied into the body 38, the movable body 40
Moves axially outward until it comes into contact with the enlarged diameter head 39b of
Processing from the gap formed between the container 38 and the movable body 40
The liquid is sprayed over the entire circumference, and the body 38 and the
The spray amount determined by the gap formed between the movable body 40 and
A nut 45 to the external thread portion 39a of the support rod 39;
It can be adjusted by the screwing position of the lock nut 46. Moreover, each of the sprayers 29 ...
The strike diameter is set to, for example, 1.0 μm or more.
ing. According to the first dust collecting section 3, the laser
Gas containing welding fumes generated by the welding machine 1
While passing through the inside and being sent to the processing tank 6, the plurality of sprayers 2
Processing liquid will be sprayed from 9, 29 ...
Part of the welding fume is removed from the gas before reaching
Will be. As a result, the gas introduced into the processing tank 6
Wet collection of only the second dust collecting part 4
Reduced welding fumes as a whole
Entrapment efficiency can be improved. Moreover, each of the sprayers 29, 29,.
First inclined tube portion inclined so as to become lower toward the side
28c, the sprayers 29, 29 ...
The atomized treatment liquid removes the welding fume removed from the gas.
While including the first inclined tube portion 28c, the second inclined tube portion 28d and
And flows along the inner surface of the horizontal pipe portion 28e to the processing tank 6 side.
That is, it does not flow to the laser welding machine 1. Ma
The processing liquid sprayed from each of the sprayers 29, 29.
It collides with the inner surface of the inclined tube part 28c and scatters, but laser welding
The rising pipe 28a rising from the machine 1 is opened downward.
Through the substantially U-shaped U-shaped pipe portion 28b,
Connected to the upstream end of the first inclined tube portion 28c
Of the processing liquid generated in the first inclined pipe portion 28c.
Spray does not enter the laser welding machine 1 side. Referring again to FIG. 2, the third dust collecting section 5
An exhaust pipe 48 having one end connected to the discharge port of the bofan 9;
An exhaust processing box 49 for projecting the other end of the exhaust pipe 48,
Spray water toward the other end of the exhaust pipe 48 in the exhaust processing box 49
Are provided. The exhaust processing box 49 is provided in the second dust collecting section 4.
It is fixedly arranged on the side of the processing tank 6,
Between the exhaust processing boxes 49, the processing liquid in the processing tank 6 is equal to or less than a predetermined amount.
A part of the processing liquid is put into the exhaust processing box 49 as it accumulates on the top.
An overflow pipe 51 for overflowing is provided. Each of the nozzles 50 is pressurized (not shown).
Provided in a water conduit 52 connected to a water source,
The water conduit 52 is provided with an electromagnetic on-off valve 53. I
Each nozzle 50, 50 ... is the smallest mist of sprayed water
The diameter is determined by the nozzles 25, 25,.
Smaller than the minimum mist diameter, for example 0.5 μm
It is set as follows. The exhaust processing box 49 includes the exhaust processing box 4.
As water accumulates in a certain amount or more inside 9, some water is
Is provided with a drain pipe 54 for discharging water to the drain. Further exhaust box
At the top of 49, one or more exhaust ports 55, 55 are provided.
The exhaust ports 55, 55 have filters 56,
56 are filled. According to such a third dust collecting section 5, the second dust collecting section
Gas containing welding fumes that could not be removed by the dust part 4 is exhausted.
Each of the nozzles 50, 50,.
Weld fumes are collected due to water shower effect
And the gas further purified by the filters 56, 56
The air is exhausted from the exhaust ports 55 and 55 to the outside. In FIG. 5, a laser welding machine 1 and a wet type
Control panels 58 and 59 are provided near the dust collector 2, respectively.
The control panel 58 of the laser welding machine 1 has a laser
A welding machine control unit 61 for controlling the operation of the welding machine 1 is provided inside.
The switch is stored by the
Switch 62, stop switch for changing the switching mode
63 and a reset switch 64 are provided.
The signals from the switches 62, 63 and 64 are transmitted to the welding machine control unit 6
1 is input. The control panel 59 on the wet dust collector 2 side includes a wet dust collector.
Dust collector control unit 65 for controlling the operation of dust collector 2
The dust collector control unit 65 is provided with an electromagnetic
The opening and closing operation of the on-off valves 33 and 53 is controlled and the circulation port is controlled.
Invert so that the pump 19 rotates at a constant speed.
Control the turbo fan 9 and change its rotation speed.
To control the inverter. Also alarm
60 is connected to the dust collector control unit 65,
The alarm 60 is activated by an alarm signal from the machine control unit 65.
Activate alarm. The dust collector control unit 65 includes a circulation pump
19 and the switching valve 22 are out of the predetermined range.
The value detected by the hydraulic pressure sensor 66 for detecting whether
A solenoid on-off valve for detecting whether the closing valve 33 has opened.
33, a stroke sensor for detecting the valve body stroke.
The detection value of the sensor 67 and whether or not the solenoid on-off valve 53 has opened
Valve stroke in the solenoid on-off valve 53 to detect
The value detected by the stroke sensor 68 for detecting the
Liquid level sensor 6 for detecting the liquid level in processing tank 6 in section 4
Exhaust pipe for guiding the gas from the turbo fan 9 with the detected value of 9
48, the detected value of the temperature sensor 70 for detecting the temperature in the
Flow rate of gas sucked from wet welder 1 to wet dust collector 2
In the conduit 28, for example, in order to detect
Flow velocity sensor attached to the part near the gas introduction box 15 of 4
The detection value of 71 is input. Each of the sensors 66 to 71 is a wet type dust collector 2
Function as an abnormality detector to detect abnormalities
Yes, the dust collector control unit 65
An abnormality is determined based on the detection values of ~ 71. That is, the hydraulic pressure sensor 66 is
19 and between the two filters 20 and 20
Although it is to be detected, the inverter of the circulation pump 19
If the fluid pressure becomes too low due to an abnormality, etc., the circulation pump
19 can be determined to be abnormal,
If the pressure becomes too high, both filters 20
The filter 20 in use is clogged.
It is possible to judge. That is, the hydraulic pressure sensor 66
The dust collector control unit 65 sets the circulation pump 1
9 and the filter 20 can be detected. The stroke sensors 67 and 68 are electromagnetically opened and closed.
This is for detecting the valve stroke of the valves 33 and 53.
However, the signal to open the solenoid on-off valves 33 and 53 is controlled by the dust collector.
When output from the unit 65, each of the on-off valves 33, 53
Make sure that the valve has not stroked to the open position.
The dust sensors are detected by the roak sensors 67 and 68.
In the control unit 65, the electromagnetic on-off valves 33 and 53 are abnormal.
Will be determined. The liquid level sensor 69 detects the processing liquid in the processing tank 6.
The liquid surface is set in four stages of "HH", "H", "L", "LL"
It can be detected by the liquid level sensor 69.
When the output value is "HH", the dust collector control unit
65 is a blockage of the overflow pipe 51 and a liquid level sensor.
69 will be judged to be abnormal,
When the detection value of the sensor 69 is “LL”,
The machine control unit 65 detects an abnormality of a water supply valve (not shown),
The water source is closed or the liquid level sensor 69 itself is abnormal.
Will be determined. The detection value "H" of the liquid level sensor 69,
"L" is for controlling water supply into the processing tank 6.
When the detection value of the liquid level sensor 69 is “L”.
The dust control unit 65 is provided for supplying water into the processing tank 6.
The water supply valve is opened, and the detected value of the liquid level sensor 69 is
When it is “H”, the dust collector control unit 65
The water valve will be closed.
The liquid level in the tank 6 is in a range between “L” and “H”. The temperature sensor 70 detects the temperature inside the exhaust pipe 48.
The dust collector control unit 65
When the temperature detected by the temperature sensor 70 is abnormally high, the wet collection
If a fire occurs in the dust machine 2 or there is a possibility of a fire
You can judge. At this time, manual operation by workers
Or automatically open the water supply valve 14 from the water injection nozzle 12
By injecting water toward the turbo fan 9, the fire
It is possible to prevent disasters from occurring and to extinguish fires.
You. The flow rate sensor 71 determines the gas flow rate in the conduit 28.
However, the dust collector control unit 65 includes:
Based on the detection value of the flow velocity sensor 71, the turbo fan 9
Control and determine whether the turbo fan 9 is abnormal.
You. That is, the dust collector control unit 65 includes the flow rate sensor 7
1 so that the detection value of 1 is within the preset range.
The fan 9 is controlled by an inverter.
The lower limit is that welding fume adheres and accumulates on the inner surface of the conduit 28.
This is set as a value to prevent
In the embodiment, the speed is 20 m / sec.
Dust collector system when the inverter of turbo fan 9 is abnormal
The control unit 65 will determine. Also within the above range
The upper limit value is set, for example, for laser welding with the laser welding machine 1.
To be performed in a nitrogen gas atmosphere with a temperature of 99.7% or more
This is a value for guarantee. In this embodiment, for example, 27
m / sec. FIG. 6 and FIG.
The operation of the laser welding machine 1 is controlled according to the procedure indicated by 7
First, in step S1 of FIG. 6, the flag FR
Is "1". This flag FR
In the first processing cycle, it is set to “1” and reset.
Set to "1" by operation of the set switch 64
Since FR = 1 in the first processing cycle,
The process proceeds from step S1 to step S2. In step S2, if the flag FS is "1"
Check if there is. This flag FS is used for the first processing.
Although set to “0” in the cycle, the dust collector control
In response to the start permission signal being input from the knit 65
It becomes “1”, and when FS = 0,
From step S2 to step S3, FS = 1
Sometimes, the process proceeds from step S2 to step S8. In step S3, the start switch 62 is operated.
The start switch 62 is operated after confirming that the
When it is confirmed that the start signal is
This start signal is given to the dust collector control unit 65
Will be done. In step S5, the dust collector control unit 6
5. Check if an abnormal signal is input from 5
If no is input, step from step S5
Proceed to S6, and if an abnormal signal is input,
The process proceeds from step S5 to step S13. In step S5, an abnormal signal is input.
If it is confirmed that no operation has been performed,
The start permission signal is input from the dust collector control unit 65
The start permission signal was input.
Sometimes, the flag FS is set to "1" in step S7.
Later, in step S8, the automatic operation of the laser welding machine 1 is performed.
So that In the next step S9, the dust collector control unit
Check whether an abnormal signal is input from the port 65,
When it is confirmed that no abnormal signal is input,
Proceed from step S9 to step S10 to input an abnormal signal.
Is confirmed from step S9 to step S14
move on. In step S10, the stop switch 63 is turned on.
Confirm that the switch has been operated, and confirm that the stop switch 63 has been operated.
If it is recognized, the laser welding machine 1
Dynamic operation is stopped, and a stop signal is output.
The stop signal is given to the dust collector control unit 65. further
After the end of the processing in step S11, the flow proceeds to step S12.
The lag FS is set to “0”. After the start switch 62 is operated, a start permission signal
Until the dust is input from the dust collector control unit 65.
When the input of the abnormal signal is confirmed in step S5, the laser
Before the start of the contactor 1, the dust collector control unit 65
A flag FA indicating that a normal signal has been input is set to step S
After setting to "1" in step 13, an error
Execute the process. Also, when the start permission signal is input, the laser
After the automatic operation of the welding machine 1 is started, the dust collector control unit
In step S9, the fact that an abnormal signal has been input from
If confirmed, an abnormal process is executed in step S14.
You. The abnormality processing in step S14 is shown in FIG.
It is executed according to a subroutine, and
In S15, it is confirmed whether or not the flag FA is "1".
When it is confirmed that FA = 1,
Abnormality from the dust collector control unit 65 before starting the welding machine 1
When a signal is input, laser melting is performed in step S16.
The stop signal is sent to the dust collector control unit while the machine 1 is stopped.
65 and output the flag FA in step S17.
Is set to “0”. Also, in step S15, FA = 0
Is confirmed, that is, the laser welding machine 1
After the automatic operation is started, from the dust collector control unit 65
When an abnormal signal is input, the process proceeds to step S18.
And stop the laser welding machine 1 and perform welding with the laser welding machine 1
Ejects workpieces for which processing has not been completed, and outputs a stop signal.
Is output to the dust collector control unit 65. Steps S17 and S18
After the completion of the processing, the flag FS is set in step S19.
After setting to “0”, the dust collector control unit is
Check whether the error release signal is input from the
When the input of the error release signal is confirmed,
Whether the reset switch 64 has been operated in step S21.
Check the operation of the reset switch 64
Sets the flag FR to "1" in step S22. In step S20, the dust collector control unit
When the input of the error release signal from 65 is not confirmed,
And operation of the reset switch 64 in step S21
Is not confirmed, the flag F is set in step S23.
Set R to "0". With such a welding machine control unit 61,
Summarizing the control procedure, the welding machine control unit 61 starts
In response to the operation of the switch 62, the start signal is transmitted to the dust collector control unit.
To the stop switch 63
In response, a stop signal is given to the dust collector control unit 65 to start the operation.
Start permission from dust collector control unit 65 after output of motion signal
Start the laser welding machine 1 in response to a signal input
With the operation of the stop switch 63 together with the laser welding machine
1 to stop the operation of the laser welding machine 1
Control. Before and after starting the laser welding machine 1
Regardless, an abnormal signal is input from the dust collector control unit 65.
When pressed, the welding machine control unit 61
Stop the operation of the contactor 1 and send a stop signal to the dust collector control unit
65 with the abnormal release operation on the wet dust collector 2 side
And an abnormality clearing signal is input from the dust collector control unit 65.
Start in response to the operation of the reset switch 64
The signal will be given to the dust collector control unit 65. On the other hand, the dust collector control unit 65
The operation of the wet dust collector 2 is controlled according to the procedure shown in FIG.
First, in step S31 of FIG.
Check whether FE is “1”. This flag FE
Is "1" when the operation of the wet dust collector 2 is stopped.
Yes, it is "0" in the first processing cycle. In step S31, it is confirmed that FE = 0.
If it is recognized, the welding machine control unit
Check if a stop signal is input from 61
When it is confirmed that the stop signal is not input,
In step S33, a start signal is sent from the welding machine control unit 61.
Check whether the input has been made and check the start signal input.
If it has, the process proceeds from step S33 to step S34.
No. In step S34, the welding machine control unit
Based on the input of the start signal from the
And the circulation pump 19 are activated,
The valves 33 and 53 are opened, and in step S35, each sensor
After reading the detection values of 66 to 71, the process proceeds to step S36.
And in the wet dust collector 2 according to the subroutine shown in FIG.
Determine whether an abnormality has occurred. In step S31, when FE = 1
In step S37 when it is confirmed that there is
It is determined whether or not FF is “1”. This flag FF
Is "1" when an abnormality occurs in the wet dust collector 2.
The first processing cycle and the abnormal release status
Is "0". Thus, in step S37, FF = 0
If it is confirmed that there is, step S37 starts.
Proceeds to step S32 and confirms that FF = 1.
Otherwise, the process proceeds from step 37 to step S38. In step S38, an abnormality in the wet dust collector 2
Check whether has been canceled. Ie turbo fan
9 is detected, the value detected by the flow velocity sensor 71
Whether the abnormality of the turbo fan 9 has been released based on the
Check that the circulating pump 19 has an abnormality
An abnormality of the circulation pump 19 based on the detection value of the pressure sensor 66
Check whether or not the filter 20 has been released.
If clogging has occurred, turn off the filters 20 and 20.
Check whether the clogging condition has been cleared by changing
Confirmed based on the detection value of the sensor 66,
When an abnormality occurs in the solenoid valves 33 and 53,
The stroke setting is used to determine whether the abnormality has been
Check based on the detection values of sensors 67 and 68,
When the detection value of 70 is too high, the water injection nozzle 12
Temperature to determine whether the temperature has dropped sufficiently
Is confirmed on the basis of the detection value of the
If there is an abnormality in the liquid level of the
It is checked whether the abnormality has been cleared based on the output value. In step S38, the wet type dust collector 2
When it is confirmed that the abnormality has been released,
FF is set to "0", and in the subsequent step S40,
Outputs the abnormality release signal to be given to the welding machine control unit 61
I do. In step S32, a stop signal is output.
If it is confirmed that the input has been made, step S4
1, a stop process according to a subroutine shown in FIG.
Will be executed. In FIG. 9, in step S42,
Check whether the FT is “1”. This flag F
T is for judging an abnormality when starting the wet dust collector 2.
It becomes "1" when the set time elapses
FT = 0 in the first processing cycle. In step S42, it is confirmed that FT = 0.
If the answer is YES, in step S43, the timer tS
And the count time tS is equal to or longer than the set time T1.
It is determined in the next step S44 whether or not it is above. Like this
The set time T1 is the time when the turbo fan
9 and the circulation pump 19 are started, and the electromagnetic
Detection of each sensor 66 to 71 from the time when the valves 33 and 53 are opened
It is set as the time required for the value to stabilize. It is determined in step S42 that tS ≧ T1.
If confirmed, the timer tS is reset in step S45.
After that, in step S46, the wet dust collector 2
Check whether the status is abnormal. This first abnormal state
Indicates that the circulation pump 19 is abnormal, the filter 20 is clogged,
Abnormality of the solenoid on-off valves 33 and 53, abnormal liquid level in the processing tank 6,
And at least one of the abnormalities of the turbo fan 9 has occurred.
The hydraulic pressure sensor 66 and the stroke sensor 6
7, 68, detection of liquid level sensor 69 and flow rate sensor 71
A first abnormal state is determined based on the value. In step S46, the wet type dust collector 2 detects the first abnormality.
If it is determined that the state is not normal, the process proceeds to step S47.
The start permission signal given to the welding machine control unit 61
And outputs the flag FT in step S48.
Set to “1”. In step S46, the wet dust collector 2
When it is determined that the vehicle is in the abnormal state of No. 1, step S4
Outputs an abnormal signal to be given to the welding machine control unit 61 at 9
Then, the flag FF is set to “1” in step S50. At step S42, it is determined that FT = 1.
If it is confirmed, the process proceeds from step S42 to step S51.
The filter 20 is clogged in step S51.
Is determined based on the detection value of the hydraulic pressure sensor 66.
Check that clogging has occurred.
To the welding machine control unit 61 in step S52
After outputting an abnormal signal indicating that the flag F
F is set to "1", and the routine proceeds to step S54. Again
Check that the filter 20 is not clogged in Step S51.
Is confirmed, the steps S52 and S53 are bypassed.
To step S54. In step S54, the wet dust collector 2
Check if there is an abnormal condition. This second condition
The state is as follows: The abnormality of the circulation pump 19, the electromagnetic on / off valves 33, 53
Abnormality, abnormal liquid level in the processing tank 6, abnormal temperature of the exhaust pipe 48, etc.
And at least one of the abnormalities of the turbo fan 9 has occurred.
The hydraulic pressure sensor 66 and the stroke sensor 6
7, 68, liquid level sensor 69, temperature sensor 70, and flow rate
Determine the second abnormal state based on the detection value of the sensor 71
I do. In step S54, the wet dust collector 2
If it is confirmed that the state is abnormal, step S5
At 5, an alarm signal is output to be given to the alarm device 60.
You. Based on this alarm signal, the alarm 60 emits a sound and
An alarm is activated by a display or the like. In FIG. 10, in step S56,
The count of imE is executed, and the count time tE becomes
It is determined in the next step whether the set time T2 is, for example, 1 minute or more.
In step S57, it was confirmed that tE ≧ T2.
Sometimes, in step S58, the count time tE
Is set time T3 longer than the set time T2, for example,
Check whether it is 1 minute 30 seconds or more. It is determined in step S58 that tE <T3.
When it is confirmed, that is, when T2 ≦ tE <T3
Starts the operation of the circulation pump 19 in step S59.
Stop and supply water to nozzles 50
Valve 53 is closed. In step S58, tE ≧ T3 is satisfied.
Is determined in step S60,
Time tE is longer than the set time T3.
T4 Check whether it is longer than 2 minutes or not. It is determined in step S58 that tE <T4.
When confirmed, that is, when T3 ≦ tE <T4
In step S61, each spray of the first dust collection unit 3
For supplying compressed air for spraying to the devices 29, 29 ...
The on-off valve 33 is closed. Further, in step S60, tE ≧ T4
If it is confirmed that the turbo
The operation of the fan 9 is stopped, and the timer tE is set in step S63.
After the reset, the flag FE is set to "1" in step S64.
Set to. The dust collector control unit 65 as described above
To summarize the control procedure, the dust collector control unit 65
Wet collection according to the start signal input from the machine control unit 61
When the operation of the dust generator 2 is started,
When the set time has elapsed, the detection of each of the sensors 66 to 71 is performed.
It is determined that the wet dust collector 2 is operating normally based on the output value.
The start permission signal is transmitted to the welding machine control unit 6 in response to the disconnection.
1 and a stop signal is input from the welding machine control unit 61.
After a predetermined delay time (1 minute in this embodiment) after being pressed
After that, the operation of stopping the operation of the wet dust collector 2 is executed.
To control the operation of the wet dust collector 2. Moreover, the dust collector control unit
The knit 65 constantly monitors the wet type dust collector 2 for abnormalities.
When it is determined that an abnormality has occurred, an
The control signal is given to the control unit 61, and an abnormal signal
Signal from the welder control unit 61
When input, the operation of the wet dust collector 2 must be stopped.
And Next, the operation of this embodiment will be described.
And the welding fume generated by the laser welding machine 1
Along with the wet dust collector 2 and the wet dust collector 2
Each of the first to third dust collecting sections 3, 4 and 5 performs wet dust collection processing.
They will be executed sequentially. At this time, the first to third dust collecting units
In the case of 3 to 5, the spray mist diameter decreases gradually. I.e.
1 The minimum mist diameter due to the atomizers 29 in the dust collecting section 3
For example, it is not less than 1.0 μm.
5 is, for example, 0.5 to 1.0 μm
And the filter 20 in the second dust collecting section 4
The brush diameter is set to, for example, 1.0 μm. did
Therefore, the welding fumes will be removed sequentially from the largest one.
Fumes are efficiently captured by the filter 20 and
1.0 µm or less for gas passing through
Avoid the fumes above. In addition, the third dust collector
5 has a minimum mist diameter of 0.5 μm
Yes, fine particles that could not be captured by the mechanical filter 10
Fumes are effectively captured, and the first to third dust collection
The wet dust collection efficiency in the parts 3 to 5 is, for example, 99.8% or more.
Can be increased. In the first dust collecting section 3, the conduit 28 is,
placeThe first is inclined so as to become lower as it goes to the treatment tank 6 side.
A plurality of inclined tube portions 28c for spraying the processing liquid are provided.
Are provided in the first inclined pipe portion 28c.
ing. For this reason, it was sprayed from the sprayers 29, 29 ...
The treatment liquid removes some welding fumes from the gas.
The processing liquid containing the welding fumes removed and
Pipe section 28c, second inclined pipe section 28d, and horizontal pipe section 28e
And flows to the processing tank 6 side through the inner surface of the
It does not flow to the welding machine 1. Therefore, the conduit 28
The inner surface is wet with the processing liquid sprayed from the sprayers 29, 29 ...
Since this processing solution flows to the processing tank 6 side, the conduit 2
8 to prevent welding fume from adhering to the inner surface
Fire even if the conduit 28 is made of synthetic resin.
There is no danger. The second dust collecting section 4 circulates from the bottom of the processing tank 6.
The processing liquid sucked by the ring pump 19 is supplied to the processing tank 6 by a plurality of processing liquids.
Circulates as if ejected from nozzles 25, 25 ...
The gas is removed from the gas in the processing tank 6 by contact with the processing liquid.
Weld fume granulated in treatment liquid and conduit 2
Welding contained in the processing liquid flowing into processing tank 6 from inside 8
During the circulation of the processing solution by the circulation pump 19, the fumes
It is removed by the filter 20. Therefore, the welding hue
Welding fumes in the treatment liquid in contact with gas containing
And the second and the second dust collection
It is possible to increase the welding fume collection efficiency in parts 3 and 4.
Wear. Further, the pair of filters 20 and 20 are
2 and connected to the circulation pump 19
Are connected to the nozzles 25 through a valve 23.
By switching the switching valves 22 and 23, a pair of
Filters 20 and 20 can be used alternatively and sequentially.
is there. Therefore, the operation of the wet dust collector 2 should not be stopped.
Weld fume collected from clogged filter 20
To eliminate clogging. In addition, a processing solution comprising a coagulant mixed in water
Is used in the first and second dust collecting sections 3 and 4,
The welding fumes in the treatment liquid aggregate and increase in diameter.
The welding fume quickly drops from near the level of the treatment liquid.
The gas containing welding fumes will sink
Where the welding fumes are dispersed and suspended in the treatment liquid
Can be avoided as much as possible. In addition, circulation port
The processing liquid circulated by the pump 19 passes through the filter 20.
Therefore, the welding fume that has agglomerated due to agglomeration
0 effectively removes the welding fume.
Effective collection is possible. Further, a surfactant is mixed into the treatment liquid.
The welding hull in the processing tank 6 of the second dust collecting section 4
The surface action of the surfactant when the
And the foam is formed on the surface of the processing solution.
Is effective, and its bubbling and multiple
By spraying the processing liquid from the nozzles 25, 25,.
Is more effectively collected. Further, a magnet is provided on the bottom of the processing tank 6.
26 is installed, so that the iron-based welding
Relatively large particles of several μm or more
It is effectively absorbed and captured by the magnet 26 in the
The efficiency of trapping welding fumes in the dust collector 2 is further improved.
It is. By the way, the operation of the laser welding machine 1 is
While controlled by the control unit 61, the wet dust collector 2
Is controlled by the dust collector control unit 65.
You. Thus, the welding machine control unit 61 is provided with a start switch.
The start signal and the
Output after the start signal is output.
Starting the laser welding machine 1 in response to the operation permission signal being input.
The laser moves in response to the operation of the stop switch 63.
The operation of the welding machine 1 is stopped. Dust collector control unit 6
5 corresponds to a start signal input from the welding machine control unit 61.
The operation of the wet dust collector 2 is started and
Of the wet dust collector 2
Based on the detection values of the sensors 66 to 71 that detect the
When it is determined that the dust collector 2 is operating normally
A start permission signal is given to the welding machine control unit 61 to perform welding.
Predetermined after the stop signal is input from the machine control unit 61
Of the wet dust collector 2 after the delay time elapses
I am trying to do it. Therefore, when the laser welding machine 1 starts,
, The wet type dust collector 2 is always in a normal operating state,
After the laser welding machine 1 stops, a predetermined delay time elapses.
Until the normal operation of the wet dust collector 2 is continued
You. As a result, the wet dust collector 2 is not operating normally.
In the state, the fume generated by the laser welding machine 1 is wet dust collection
It did not flow to the welding machine 2 side and occurred in the laser welding machine 1
The fume is always cooled by the processing liquid in the wet dust collector 2.
It is collected while being spilled, and a fume fire occurs
Can be prevented as much as possible. The dust collector control unit 65 is provided with a laser melting unit.
Automatic operation by the welding machine control unit 61 of the machine 1 starts
After that, based on the detection values of the sensors 66 to 71,
The wet dust collector 2 is monitored for abnormalities.
From the dust collector control unit 65 in response to
When an abnormal signal is given to the machine control unit 61
, The welding machine control unit 61 operates the laser welding machine 1
And the stop signal is sent to the dust collector control unit 65.
And the dust collector control unit 65 receives the stop signal
Accordingly, the stop processing of the wet dust collector 2 is executed.
Further, when an abnormality occurs in the wet dust collector 2, the wet dust collector 2
Operation of the laser welding machine 1 before welding of the welding machine 2 is stopped
Of the wet-type dust collector 2
When the abnormality is cleared, the dust collector control unit 645
Switch 6 after an error release signal is output from the
In accordance with the operation of 4, the dust collector control unit 65 is a wet dust collector.
Start of operation 2 and control start permission signal by welding machine
It is input to the unit 61 and melted according to the start permission signal input.
The machine control unit 61 starts the operation of the laser welding machine 1.
You. As a result, the welding fume generated by the laser welding machine 1
Flows toward the wet dust collector 2 when the wet dust collector 2 is stopped.
No, the wet fume collector 2 side by welding fume
Ignition will be prevented as much as possible. Further, the turbo fan 9 is provided with a dust collector control unit.
The inverter 65 is controlled by the
The air volume is not adjusted by the pa. others
Possibility of ignition due to adhesion of welding fume to damper
Can be eliminated. In other words, air volume control by damper
Control, many hue over time
Will adhere to the damper, and eventually peel off at once.
Because it increases the possibility of ignition
However, by performing inverter control,
The possibility of ignition due to the adhesion of fumes is eliminated.
You. For air volume control by damper, install damper
Need to secure enough space for the
To perform inverter control.
Can solve such problems.
You. The embodiment of the present invention has been described in detail above.
The description is not limited to the above embodiment, but
Various designs without departing from the invention described in the scope
Changes can be made. For example, in the above embodiment, the wet type dust collector 2
The air for spraying is supplied only to the first dust collecting section 3
However, the air for spraying is also applied to the second and third dust collecting sections 4 and 5.
It may be introduced. Dust collection for turbo fan 9
Control by the machine control unit 65
However, the turbo fan 9 is manually operated by the operator.
Inverter control may be performed. Further interface
Activator or flocculant mixed into water for treatment
A liquid may be created. The filters 20, 20 are provided in the processing tank 6 and
It may be provided between the circulation pumps 19. [0097] As described above, according to the present invention, the inside of the conduit is
Part of the welding fume in the flowing gas is sprayed from each sprayer
Removed by the treatment liquidJurisdictionFlows to the processing tank side
As a result, welding fumes are prevented from adhering to the conduit as much as possible.
Even if the conduit is made of synthetic resin, a fire
It is possible to prevent kinking as much as possible. And inside the processing tank
Is removed from the gas by contact with the processing solution
Granulated welding fume and flowing from the conduit side
Weld fumes contained in the treated liquid are circulated by a circulation pump.
Is removed by the filter during the circulation of
Particulate welding fumes in the treatment liquid that comes in contact with the contact fumes
Dispersion, floating state can be avoided as much as possible,
The collection efficiency of welding fume can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall side view of a laser welding machine and a wet dust collector. FIG. 2 is a schematic vertical sectional view of a main part of the wet dust collector. FIG. 3 is an enlarged longitudinal sectional view showing a part of a first dust collecting part. FIG. 4 is an enlarged vertical sectional view of the sprayer. FIG. 5 is a diagram illustrating a configuration of a control system. FIG. 6 is a flowchart showing a processing procedure in a welding machine control unit. FIG. 7 is a flowchart showing an abnormality processing procedure in the welding machine control unit. FIG. 8 is a flowchart showing a processing procedure in the dust collector control unit. FIG. 9 is a flowchart showing an abnormality processing procedure in the dust collector control unit. FIG. 10 is a flowchart showing a stop processing procedure in the dust collector control unit. [Description of Signs] 1 laser welder 2 wet dust collector 6 treatment tank 19 circulating pump 20 filter 25 nozzle 28 conduit 28c inclined Tube part 29: sprayer

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hiroaki Yokoyama 3700 Wadayama, Shimonaka-machi, Sadohara-cho, Miyazaki-gun, Miyazaki Prefecture Honda Rock Co., Ltd. (56) References JP-A-10-156544 (JP, A) JP-A-6-55026 (JP, A) JP-A-9-857 (JP, A) JP-A-6-292970 (JP, A) JP-A-3-262510 (JP, A) (58) Int.Cl. ⁷ , DB name) B01D 47/02 B23K 26/16

Claims (1)

(1) Welding in which a wet dust collector (2) for collecting welding fume generated by the laser welding machine (1) is connected to the laser welding machine (1). In the fume collecting apparatus, the wet type dust collector (2) has an inclined pipe portion (28c) which becomes lower as it separates from the laser welding machine (1) at an intermediate portion.
A conduit (28) upstream end is connected to the laser welder (1) as well as, the inclined pipe portion and a plurality of atomizers provided in (28c) (29), from the atomizer (29)
A processing tank (6) to which a downstream end of the conduit (28) for introducing the sprayed processing liquid is connected and in which a processing liquid is stored so as to allow gas from the conduit (28) to dive; A plurality of nozzles (25) fixedly disposed in the processing tank (6) so as to eject a processing liquid toward a gas flow flowing upward from the liquid surface of the processing tank (6); A circulating pump (19) for supplying the sucked processing liquid to the sprayer (29) and the nozzle (25); a circulating pump (19); the sprayer (29);
A filter (20) provided between the circulating pump (19) and the processing tank (6).