CN105290613B - Vacuum welding device and method for preventing laser seam from generating pores - Google Patents
Vacuum welding device and method for preventing laser seam from generating pores Download PDFInfo
- Publication number
- CN105290613B CN105290613B CN201510730876.6A CN201510730876A CN105290613B CN 105290613 B CN105290613 B CN 105290613B CN 201510730876 A CN201510730876 A CN 201510730876A CN 105290613 B CN105290613 B CN 105290613B
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- welding
- postwelding
- laser
- vacuum
- valve
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/1224—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to a vacuum welding method for preventing a laser seam from generating pores. A vacuum welding device for preventing the laser seam from generating the pores is designed for the method. The vacuum welding device comprises a laser, a welding chamber, a focusing head and a vacuum pump; the laser and the vacuum pump are located outside the welding chamber; one end of the focusing head is connected with the laser through a laser conducting cable; the other end of the focusing head is inserted into the welding chamber; a pre-vacuum-pumping chamber is arranged on one side of the welding chamber; a postwelding sampling chamber is arranged on the other side of the welding chamber; the welding chamber is communicated with the pre-vacuum-pumping chamber and the postwelding sampling chamber; the pre-vacuum-pumping chamber, the welding chamber and the postwelding sampling chamber are communicated with the vacuum pump. The vacuum welding device and method for preventing the laser seam from generating the pores can prevent from generating the pores when the laser seam is solidified, the process is simple, and operation is convenient.
Description
Technical field
The present invention relates to laser welding technology field, in particular to a kind of vacuum welding for preventing laser welded seam from producing stomata
Apparatus and method.
Background technology
Laser Welding is due to having the advantages that welding heat affected zone is small, weldment deformation less, without electrode and solder, be widely used in
In automobile component production.
But, Laser Welding cooling velocity is fast, and weld seam does not have safeguard measure, and molten pool metal easily produces stomata when solidifying.This
Art personnel's analysis finds, when its main cause is that nitrogen in air is involved in weld seam molten bath, if cooling rate is slower, and gas
Can float in spilling into air, and Laser Welding cooling velocity is very fast, nitrogen and other gases in molten bath often have little time emersion
And form stomata in being set in weld seam.
Stomata belongs to a kind of weld defect, and in punching press, stomata position usually turns into the fracture origin of steel plate cracking to steel plate, makes
Steel plate is scrapped because fracture cannot be used.
The content of the invention
Produced present invention aim to provide a kind of compact conformation, process is simple, the easy to operate laser welded seam that prevents
The vacuum welding device and method in angry hole.
To achieve the above object, the laser welded seam that prevents designed by the present invention produces the vacuum welding device of stomata, including
Laser, welding booth, focus head, vavuum pump；The laser and vavuum pump are respectively positioned on the welding outdoor, the focus head
One end is connected by laser conduction cable with laser, in the other end insertion welding booth of the focus head；The welding booth
Side is provided with preevacuated chamber, and the opposite side of the welding booth is provided with postwelding sampling room, the welding booth and the forvacuum
Room connects with the postwelding sampling room；The preevacuated chamber, the welding booth and the postwelding sampling room respectively with it is described
Vavuum pump is connected.
Further, the preevacuated chamber is provided with the first hatch door, between the preevacuated chamber and the welding booth
It is provided with the first valve；The postwelding sampling room is provided with the second hatch door, is provided between the postwelding sampling room and the welding booth
Second valve.
Further, the welding booth is surrounded by high-strength clear glass；The preevacuated chamber, the welding booth and described
The bottom of postwelding sampling room is provided with workbench walking track.
Further, the preevacuated chamber, the welding booth and the postwelding sampling room pass through pipeline and institute respectively
Vavuum pump connection is stated, the pipeline is provided with control valve, and the vavuum pump is provided with pressure gauge.
The present invention produces the vacuum welding method of stomata, including following operation step using the laser welded seam that prevents of said apparatus
Suddenly：
Step 1：The second hatch door, the first valve and the second valve are closed, starts vavuum pump to welding booth and postwelding sampling room
Carry out forvacuum；
Step 2：Sample to be welded is put on the welding bench in the forvacuum room, the first hatch door is closed, started
After vavuum pump is vacuumized, the first valve is opened, welding bench is moved to welding booth, and close the first valve；
Step 3：Start laser, being directed at weld seam after laser line focus head is focused on is welded, and after welding is finished, is closed
Laser；
Step 4：The second valve is opened, welding bench is moved to postwelding sampling room, close the second valve, open second
Hatch door, takes out the sample that welding is completed, and close the second hatch door.
Further, in the step 2, the welding bench is moved to the welding along workbench walking track
Room；In the step 4, the welding bench is moved to the postwelding sampling room along workbench walking track.
Further, the vavuum pump monitors house vacuum state by pressure gauge, after the vavuum pump is stopped,
The control valve closed on pipeline.
The beneficial effects of the present invention are：Be placed in vacuum environment for welding and carry out by the present invention, it is to avoid air connects with weld seam
Touch, weld seam does not have being involved in for the gases such as nitrogen when solidifying, while a small amount of gas produced during welding can be because under vacuum environment
Low pressure and overflow rapidly, it is to avoid weld seam forms stomata because cooling is quick, so as to reach the mesh for preventing weld seam from producing gas
's；The present invention is respectively provided on two sides with reserved vacuum chamber and postwelding sampling room as transition chamber in welding booth, when sample introduction is with sampling only
The valve of the both sides of welding booth is closed, then welding booth can be kept to be constantly in vacuum state, reduce the pumpdown time；Welding is in
Carried out under close to vacuum state, weld seam molten bath is difficult to be oxidized, and weldquality is preferable；Welding booth is surrounded by high-strength clear glass,
With Real Time Observation and laser welding position can be adjusted.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the vacuum welding device for preventing laser welded seam from producing stomata；
Fig. 2 is the overlooking the structure diagram of Fig. 1；
In figure：Laser 1, welding booth 2, focus head 3, pipeline 4, sample to be welded 5, preevacuated chamber 6, welding bench 7,
Weld seam 8, workbench walking track 9, postwelding sampling room 10, vavuum pump 11, the first hatch door 12, the second hatch door 13, the first valve 14,
Second valve 15, control valve 16, pressure gauge 17.
Specific embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
A kind of vacuum welding device for preventing laser welded seam from producing stomata as shown in Figures 1 and 2, including laser 1,
Welding booth 2, focus head 3, vavuum pump 11；The laser 1 and vavuum pump 11 are respectively positioned on outside the welding booth 2, the focus head 3
One end be connected with laser 1 by laser conduction cable, in the other end of the focus head 3 insertion welding booth 2；The welding
The side of room 2 is provided with preevacuated chamber 6, and the opposite side of the welding booth 2 is provided with postwelding sampling room 10, the welding booth 2 and institute
Preevacuated chamber 6 is stated to be connected with the postwelding sampling room 10；The preevacuated chamber 6, the welding booth 2 and the postwelding take
Specimen chamber 10 is connected with the vavuum pump 11 respectively.The vavuum pump 11 is vacuumized to whole device, is made in whole device in one
The environment close to vacuum is planted, sample to be welded 5 is welded under vacuo, it is to avoid air is contacted with weld seam 8, weld seam does not have nitrogen when solidifying
The gases such as gas are involved in, while a small amount of gas produced during welding can rapidly overflow because of the low pressure under vacuum environment, it is to avoid
Weld seam 8 forms stomata because cooling is quick.
In above-mentioned technical proposal, the preevacuated chamber 6 is provided with the first hatch door 12, the preevacuated chamber 6 with it is described
The first valve 14 is provided between welding booth 2；The postwelding sampling room 10 is provided with the second hatch door 13, the postwelding sampling room 10 with
The second valve 15 is provided between the welding booth 2.When vacuumizing welding, in the case where hatch door and valve are co-operated, in sample introduction and take
Yang Shi welding booths 2 can be in the state of vacuum.
In above-mentioned technical proposal, the welding booth 2 is surrounded by high-strength clear glass, with Real Time Observation and can adjust Laser Welding
Socket part position；The bottom of the preevacuated chamber 6, the welding booth 2 and the postwelding sampling room 10 is provided with workbench walking track
9, welding bench 7 can facilitate and be sampled in preevacuated chamber 6, welding booth 2 and postwelding under the manipulation of workbench walking track 9
Move back and forth in room 10.
In above-mentioned technical proposal, the preevacuated chamber 6, the welding booth 2 and the postwelding sampling room 10 pass through respectively
Pipeline 4 is connected with the vavuum pump 11, and the pipeline 4 is provided with control valve 16, and the vavuum pump 11 is provided with pressure gauge 17.
When the vavuum pump 11 is stopped, closing control valve 16 can prevent air from entering in welding booth 2 from vavuum pump 11；
The pressure gauge 17 can monitor vavuum pump 11 in pressure to observe each house vacuum state.
The vacuum welding method of stomata, including following operating procedure are produced using the laser welded seam that prevents of said apparatus：
Step 1：The second hatch door 13, the first valve 14 and the second valve 15 are closed, starts vavuum pump 11 to welding booth 2 and weldering
Sampling room 10 carries out forvacuum afterwards, it is possible to reduce pumpdown time during welding；
Step 2：On the welding bench 7 that sample to be welded 5 is put into preevacuated chamber 6, the first hatch door 12 is closed, started
After vavuum pump 11 is vacuumized to preevacuated chamber 6, the first valve 14 is opened, makes preevacuated chamber 6 equal with the air pressure of welding booth 2,
Welding bench 7 is moved to welding booth 2, and closes the first valve 14, now close the first valve 14, can guarantee that next pre-
Welding booth 2 is still in vacuum state when evacuated chamber 6 opens the first 12 sample introduction of hatch door；
Step 3：Start laser 1, being directed at weld seam 8 after laser line focus first 3 is focused on is welded, after welding is finished,
Close laser 1；
Step 4：The second valve 15 is opened, makes welding booth 2 equal with the air pressure of postwelding sampling room 10, welding bench 7 is moved
Move to postwelding sampling room 10, close the second valve 15, now close the second valve 15, to can guarantee that and open the in postwelding sampling room 10
Welding booth 2 is still in vacuum state when two hatch door 13 is sampled；The second hatch door 13 is opened, the sample that welding is completed is taken out.
In above-mentioned technical proposal, in the step 2, the welding bench 7 is walked under the manipulation of outside along workbench
Track 9 is moved to the welding booth 2；In the step 4, the welding bench 7 is walked under the manipulation of outside along workbench
Track 9 is moved to the postwelding sampling room 10.
In above-mentioned technical proposal, the vavuum pump 11 monitors house vacuum state, the vavuum pump 11 by pressure gauge 17
After being stopped, the control valve 16 closed on pipeline 4.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some changes and retouching are can be devised by, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of vacuum welding device for preventing laser welded seam from producing stomata, including laser (1), welding booth (2), focus head
(3), one end of the focus head (3) is connected by laser conduction cable with laser (1), the other end of the focus head (3)
In insertion welding booth (2), it is characterised in that：Also include vavuum pump (11), the laser (1) and vavuum pump (11) are respectively positioned on institute
State welding booth (2) outward, the side of the welding booth (2) is provided with preevacuated chamber (6), and the opposite side of the welding booth (2) is provided with
Postwelding sampling room (10), the welding booth (2) connects with the preevacuated chamber (6) and the postwelding sampling room (10)；Institute
Preevacuated chamber (6), the welding booth (2) and the postwelding sampling room (10) is stated to be connected with the vavuum pump (11) respectively.
2. it is according to claim 1 prevent laser welded seam produce stomata vacuum welding device, it is characterised in that：It is described pre-
Evacuated chamber (6) is provided with the first hatch door (12), and the first valve is provided between the preevacuated chamber (6) and the welding booth (2)
Door (14)；The postwelding sampling room (10) is provided with the second hatch door (13), the postwelding sampling room (10) and the welding booth (2)
Between be provided with the second valve (15).
3. it is according to claim 2 prevent laser welded seam produce stomata vacuum welding device, it is characterised in that：The weldering
Room (2) is connect to be surrounded by high-strength clear glass；The preevacuated chamber (6), the welding booth (2) and the postwelding sampling room (10)
Bottom be provided with workbench walk track (9).
4. it is according to claim 3 prevent laser welded seam produce stomata vacuum welding device, it is characterised in that：It is described pre-
Evacuated chamber (6), the welding booth (2) and the postwelding sampling room (10) pass through pipeline (4) and the vavuum pump (11) respectively
Connection, the pipeline (4) is provided with control valve (16), and the vavuum pump (11) is provided with pressure gauge (17).
5. it is a kind of prevent laser welded seam produce stomata vacuum welding method, it is characterised in that：The method uses claim 4 institute
The device stated, including following operating procedure：
Step 1：The second hatch door (13), the first valve (14) and the second valve (15) are closed, starts vavuum pump (11) to welding booth
And postwelding sampling room (10) carry out forvacuum (2)；
Step 2：On the welding bench (7) that sample to be welded (5) is put into the preevacuated chamber (6), the first hatch door is closed
(12) after, startup vavuum pump (11) is vacuumized, the first valve (14) is opened, welding bench (7) is moved to welding booth (2),
And close the first valve (14)；
Step 3：Start laser (1), being directed at weld seam (8) after laser line focus head (3) is focused on is welded, and welding is finished
Afterwards, laser (1) is closed；
Step 4：The second valve (15) is opened, welding bench (7) is moved to postwelding sampling room (10), close the second valve
(15) the second hatch door (13), is opened, the sample that welding is completed is taken out, and close the second hatch door (13).
6. it is according to claim 5 prevent laser welded seam produce stomata vacuum welding method, it is characterised in that：The step
In rapid 2, the welding bench (7) is moved to the welding booth (2) along workbench walking track (9)；In the step 4,
The welding bench (7) is moved to the postwelding sampling room (10) along workbench walking track (9).
7. it is according to claim 5 prevent laser welded seam produce stomata vacuum welding method, it is characterised in that：It is described true
Empty pump (11) monitors house vacuum state by pressure gauge (17), after the vavuum pump (11) is stopped, closes on pipeline (4)
Control valve (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510730876.6A CN105290613B (en) | 2015-10-30 | 2015-10-30 | Vacuum welding device and method for preventing laser seam from generating pores |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510730876.6A CN105290613B (en) | 2015-10-30 | 2015-10-30 | Vacuum welding device and method for preventing laser seam from generating pores |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105290613A CN105290613A (en) | 2016-02-03 |
| CN105290613B true CN105290613B (en) | 2017-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510730876.6A Expired - Fee Related CN105290613B (en) | 2015-10-30 | 2015-10-30 | Vacuum welding device and method for preventing laser seam from generating pores |
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| CN (1) | CN105290613B (en) |
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| CN105290613A (en) | 2016-02-03 |
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Effective date of registration: 20170713 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Patentee after: WUHAN IRON AND STEEL Co.,Ltd. Address before: 430080 Wuchang, Hubei Friendship Road, No. A, block, floor 999, 15 Patentee before: WUHAN IRON AND STEEL (GROUP) Corp. |
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