CN215034467U - Protective gas hood for laser welding - Google Patents
Protective gas hood for laser welding Download PDFInfo
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- CN215034467U CN215034467U CN202121449078.3U CN202121449078U CN215034467U CN 215034467 U CN215034467 U CN 215034467U CN 202121449078 U CN202121449078 U CN 202121449078U CN 215034467 U CN215034467 U CN 215034467U
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- protective gas
- laser welding
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- gas hood
- gas
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Abstract
The utility model discloses a protective gas hood for laser welding, which comprises a laser welding head, a groove and a protective gas hood, wherein the protective gas hood comprises a fixing device and a through hole; the ball plunger is arranged in the fixing device; the air outlet is welded on the fixing device and is in a sharp-mouth shape, a straight cylinder shape or a horn shape; the air inlet is arranged at one end of the air outlet; the flow control valve is arranged on the air inlet; the air inlet pipe is installed on the flow control valve. When laser welding, by welded work piece appear quick oxidation, generate gas pocket scheduling problem after the welding easily, the emergence of these problems of preventing that gas protection can be fine, but no matter directly blow or side-blown, the protective gas outlet is sharp mouth form, leads to effective protection area little, when the welding seam still needs protective gas, protective gas has left, the utility model discloses a protective gas cover can enlarge gaseous effectual protection area for the welding seam is more even pleasing to the eye.
Description
Technical Field
The utility model belongs to the technical field of relate to a protection gas cover for laser welding belongs to laser beam machining.
Background
In laser welding, the protective gas can affect the weld forming, the weld quality, the weld penetration, the weld width and the like, and the correct blowing of the protective gas can effectively protect a weld pool to reduce oxidation and even avoid oxidation; the spatter generated in the welding process is effectively reduced, and the function of protecting the focusing lens or the protecting lens is achieved; the welding seam is uniformly spread when the welding seam molten pool is solidified, so that the welding seam is uniformly and beautifully formed; the shielding effect of the metal steam plume or the plasma cloud on the laser is effectively reduced, the energy of the laser reaching the surface of the workpiece is increased, and the effective utilization rate of the laser is increased; effectively reducing weld pores.
Chinese patent publication No. CN201720542279.5 discloses a structure of coaxial blowing shielding gas of laser welding machine, it advances the pipe including encircleing coil pipe and shielding gas, encircle the coil pipe and wind in the outside of the same axle sleeve of laser, the one end connection shielding gas air inlet of encircleing the coil pipe, the shielding gas advances the pipe and is equipped with three, all set up the lower extreme that encircles the coil pipe, go up the ring around the same axle sleeve of coil pipe and laser, the shielding gas advances the pipe and is the acute angle with the contained angle between the axle sleeve of laser, the coaxial junction of advancing the pipe with the shielding gas of sheatheeing in of laser is equipped with coaxial cover shielding gas air inlet.
Chinese patent publication No. CN201620259948.3 discloses a secondary shielding gas hood for a welding head, which is disposed on a gun body housing of the welding head, the secondary shielding gas hood is a hollow shell, on which a secondary shielding gas inlet and a secondary shielding gas outlet are disposed, a rail groove is disposed on the gun body housing, and a positioning block embedded in the rail groove is disposed on one side of the secondary shielding gas hood, which is close to the gun body housing.
No matter blow directly among the prior art or blow side, the protective gas outlet is sharp mouth form, leads to effective protection area little, and when the welding seam still needed protective gas, protective gas had nevertheless left for the inhomogeneous problem of oxidation degree of welding seam.
SUMMERY OF THE UTILITY MODEL
In view of the above problems in the prior art, the present invention is directed to a shielding gas hood for laser welding.
The utility model provides a following technical scheme:
a shielding gas hood for laser welding comprises a laser welding head, wherein a groove is formed in the laser welding head, and the shielding gas hood is installed on the laser welding head and comprises a fixing device, a through hole is formed in the axis of the fixing device, the laser welding head penetrates through the through hole, and sealing rings are installed at two ends of the through hole; the ball plunger is arranged in the fixing device; the air outlet is welded on the fixing device and is in a sharp-mouth shape, a straight cylinder shape or a horn shape; the air inlet is arranged at one end of the air outlet; the flow control valve is arranged on the air inlet; the air inlet pipe is installed on the flow control valve.
Specifically, the ball plunger is installed in a threaded groove formed in the fixing device in a threaded manner, and the other end of the ball plunger is installed in the groove.
Specifically, the ball plungers are uniformly installed in the fixing device around the axis of the fixing device, and the number of the ball plungers is four.
Specifically, the other end of the air inlet pipe is arranged on the inert gas tank.
The utility model has the advantages that:
1. when laser welding, by welded work piece appear quick oxidation, generate gas pocket scheduling problem after the welding easily, the emergence of these problems of preventing that gas protection can be fine, but no matter directly blow or side-blown, the protective gas outlet is sharp mouth form, leads to effective protection area little, when the welding seam still needs protective gas, protective gas has left, the utility model discloses a protective gas cover can enlarge gaseous effectual protection area for the welding seam is more even pleasing to the eye.
2. The utility model discloses a protection gas cover simple to operate, and fixed firm, simple structure is applicable to among the welding operation.
3. The utility model discloses all available in the laser welding of direct-blow or side-blown, usable range is wide, just the utility model discloses adjustable gas flow, because wrong gas blows in the flow and can lead to the welding seam oxidation more serious (no matter be the flow too big or undersize), also can lead to welding seam molten bath metal to be caused the welding seam seriously by external force interference and sink or the shaping is inhomogeneous, adjustable gas flow can effectively protect the welding seam molten bath to reduce the oxidation, avoids even by the oxidation.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of the internal structure of embodiment 1 of the present invention;
fig. 2 is a schematic view of the internal structure of embodiment 2 of the present invention;
fig. 3 is a schematic view of the internal structure of embodiment 3 of the present invention;
fig. 4 is a schematic structural diagram of embodiment 4 of the present invention;
fig. 5 is a schematic structural diagram of embodiment 5 of the present invention;
fig. 6 is a schematic structural diagram of embodiment 6 of the present invention;
labeled as: 1. a protective gas hood; 2. a flow control valve; 3. an air inlet pipe; 4. a laser welding head; 5. an air outlet; 6. a laser welding head fixing seat; 7. a protective gas hood support frame; 8. a side-blown protective gas hood; 101. a fixing device; 102. an air inlet; 103. a ball plunger; 104. a through hole; 401. a groove; 501. a sharp-nose shape; 502. a straight cylinder shape; 503. a horn shape.
Detailed Description
Example 1
As shown in fig. 1, the shielding gas hood for laser welding comprises a laser welding head 4, a groove 401 is arranged on the laser welding head 4, and a shielding gas hood 1 is arranged on the laser welding head 4, wherein the shielding gas hood 1 comprises a fixing device 101, a through hole 104 is arranged at the axis of the fixing device 101, and sealing rings 105 are arranged at two ends of the through hole 104. The sealing ring 105 plays a role in preventing gas from leaking during operation, and waste of gas is avoided.
The laser welding head 4 passes through the through hole 104; the ball plunger 103 is installed in a threaded groove formed in the fixing device 101 in a threaded manner, the other end of the ball plunger 103 is installed in the groove 401, the ball plungers 103 are uniformly installed in the fixing device 101 around the axis of the fixing device 101, and the number of the ball plungers 103 is four; an air outlet 5 is welded on the fixing device 101, and the air outlet 5 is in a sharp-nose shape 501; the air inlet 102 is arranged at one end of the air outlet 5; the flow control valve 2 is mounted on the gas inlet 102; an intake pipe 3 is mounted on the flow control valve 2. The other end of the air inlet pipe 3 is arranged on an inert gas tank.
The ball plunger is a product which is provided with a spring inside a thread, enables the beads and the pin inside the ball plunger to set pre-pressure and can move up and down under the action of a certain force. And a proper pre-pressure is selected to clamp the workpiece or the die. The ball plunger is used as an element capable of providing pressure and accurately positioning, and the fixing mode of the ball plunger is various, such as a press-in type and a thread locking type.
The wrong selection of the gas blowing flow rate can cause the weld to be more oxidized (whether the flow rate is too large or too small), and can also cause the weld pool metal to be seriously disturbed by external force to cause the collapse or uneven forming of the weld. So the utility model discloses install flow control valve and come control gas to blow in the flow.
The wrong gas blowing mode is selected, so that the welding seam can not achieve the protection effect and even basically has no protection effect or has negative influence on the welding seam forming; the straight weld seam is blown by side and the plane closed figure is blown by direct blow. The embodiment adopts a direct blow welding mode.
The utility model discloses embodiment 1's theory of operation does:
manually inserting the laser welding head 4 into the through hole 104 in the protective gas hood 1 to push the protective gas hood 1, and when the ball plunger 103 is clamped in the groove 401, loosening the protective gas hood, wherein the heavy-load spring is selected for the ball plunger 103, and the positioning bead in the ball plunger 103 is clamped in the groove 401, so that the protective gas hood 1 is fixed on the laser welding head 4. When the laser welding head 4 is required to weld, the flow control valve 2 is opened, and the gas with proper opening is selected to blow in the flow.
For example, when oxygen protection is adopted in CO2 laser welding, the requirement on the design of the nozzle is high so as to ensure good airflow geometry, and a sharp-mouth-shaped outlet 5 can be selected; argon obtains higher flow velocity to improve the generation of liquid metal inhibition plasma, but the excessive flow velocity of argon can blow a molten pool to deviate a welding line; the nitrogen has low requirements on the structural design of the nozzle and the geometric shape of the air flow.
And (4) starting welding after selecting proper gas flow, and closing the flow control valve 2 after welding.
Example 2
As shown in fig. 2, the present embodiment is the same as embodiment 1 except that a straight cylindrical air outlet 5 is used, and the structure and the installation manner are the same.
The working principle of the embodiment 2 of the utility model is the same as that of the embodiment 1.
Example 3
As shown in fig. 3, this embodiment is the same as embodiment 1 except that the trumpet-shaped air outlet 5 is selected as the air outlet 503, and the other components are the same in structure and installation manner.
The protection gas hood 1 disclosed by the embodiment can enlarge the effective protection area of gas, so that the oxidation degree of a welding seam is uniform, and the welding seam is uniform and attractive in forming.
The working principle of the embodiment 3 of the utility model is the same as that of the embodiment 1.
Example 4
As shown in fig. 4, since the laser welding is divided into a protective gas direct blowing type and a protective gas side blowing type. Examples 1, 2 and 3 are of a protective gas direct blowing type, and examples 4, 5 and 6 are of a protective gas side blowing type.
This embodiment 4 contains laser welder head 4, installs laser welder head fixing base 6 on the laser welder head 4 installs the protection gas cover support frame 8 of laser welder head fixing base 6 both sides, the protection gas cover support frame 8 of both sides installation is for expanding the effectual protection area of gas, side-blown protection gas cover 8 is installed to protection gas cover support frame 8 one end, side-blown protection gas cover 8 one end is equipped with the gas outlet of sharp mouth form 501, and flow control valve 2 is installed to the other end, intake pipe 3 is installed to the 2 other ends of flow control valve.
The utility model discloses embodiment 4's theory of operation does:
when welding is started, the flow control valves 2 on both sides are opened, and the gas with proper opening is selected to blow in the flow. After the welding is finished, the flow control valves 2 on the two sides are closed.
Example 5
As shown in fig. 5, this embodiment is the same as embodiment 4 except that the side-blow protection cover 8 is provided with a straight cylindrical outlet 502 at the other end, and the other structures and installation manners are the same.
The working principle of the embodiment 5 of the utility model is the same as that of the embodiment 4.
Example 6
As shown in fig. 6, this embodiment is the same as embodiment 4 except that the outlet of the trumpet 503 provided at the other end of the side-blow protection cover 8 is different, and the other configurations and installation manners are the same.
The side-blown protective gas hood 8 disclosed in the embodiment can enlarge the effective protective area of gas more, so that the oxidation degree of the welding seam is uniform, and the welding seam is formed uniformly and beautifully.
The working principle of the embodiment 6 of the utility model is the same as that of the embodiment 4.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A protective gas hood for laser welding comprises a laser welding head (4), a groove (401) is arranged on the laser welding head (4), a protective gas hood (1) is arranged on the laser welding head (4),
characterized in that the protective gas hood (1) comprises
The device comprises a fixing device (101), wherein a through hole (104) is formed in the axis of the fixing device (101), the laser welding head (4) penetrates through the through hole (104), and sealing rings (105) are installed at two ends of the through hole (104);
the ball plunger (103) is installed in the fixing device (101), and the other end of the ball plunger (103) is installed in the groove (401);
the air outlet (5) is welded on the fixing device (101), and the air outlet (5) is in a sharp-mouth shape (501), a straight-tube shape (502) or a horn shape (503);
an air inlet (102) arranged at one end of the air outlet (5);
a flow control valve (2) mounted on the gas inlet (102);
and the air inlet pipe (3) is arranged on the flow control valve (2).
2. The shielding gas hood for laser welding as set forth in claim 1, wherein said ball plunger (103) is screw-fitted into a screw groove provided in said fixture (101).
3. The shielding gas hood for laser welding as set forth in claim 2, wherein said ball plungers (103) are uniformly installed in said fixture (101) around the axial center of said fixture (101), and the number of said ball plungers (103) is four.
4. A shielding gas hood for laser welding according to claim 1, characterized in that the other end of the gas inlet pipe (3) is mounted on an inert gas tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121449078.3U CN215034467U (en) | 2021-06-28 | 2021-06-28 | Protective gas hood for laser welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121449078.3U CN215034467U (en) | 2021-06-28 | 2021-06-28 | Protective gas hood for laser welding |
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| Publication Number | Publication Date |
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| CN215034467U true CN215034467U (en) | 2021-12-07 |
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| CN202121449078.3U Active CN215034467U (en) | 2021-06-28 | 2021-06-28 | Protective gas hood for laser welding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114833477A (en) * | 2022-04-01 | 2022-08-02 | 洛阳航辉新材料有限公司 | Laser welding gas protection device |
-
2021
- 2021-06-28 CN CN202121449078.3U patent/CN215034467U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114833477A (en) * | 2022-04-01 | 2022-08-02 | 洛阳航辉新材料有限公司 | Laser welding gas protection device |
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