CN216706393U - Laser resistance welding structure for eutectic brazing of copper and stainless steel part silver and copper - Google Patents
Laser resistance welding structure for eutectic brazing of copper and stainless steel part silver and copper Download PDFInfo
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- CN216706393U CN216706393U CN202123389644.9U CN202123389644U CN216706393U CN 216706393 U CN216706393 U CN 216706393U CN 202123389644 U CN202123389644 U CN 202123389644U CN 216706393 U CN216706393 U CN 216706393U
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Abstract
The utility model discloses a laser solder mask structure for silver-copper eutectic brazing of copper and stainless steel parts, which comprises a stainless steel part, a nickel-plating welding-assistant layer, a solder mask strip, a first solder welding seam, a second solder welding seam and oxygen-free copper, wherein the nickel-plating welding-assistant layer is arranged on the surface of the outer wall of the stainless steel part, two through holes are formed in the surface of the outer wall of the stainless steel part, the oxygen-free copper is welded in the through holes and forms the first solder welding seam with the inner wall of the through holes, meanwhile, the oxygen-free copper and the outer wall of the stainless steel part form the second solder welding seam, and the solder mask strip is laser-marked on the outer sides of the first solder welding seam and the second solder welding seam. The laser solder mask structure for eutectic brazing of copper and stainless steel parts and silver and copper adopts laser to make the parts with nickel plated form a solder mask zone with the thickness of 0.2-0.5mm at the outer edge of a welding seam before brazing, so that the brazing filler metal in high temperature cannot flow to other places, thereby achieving the purposes of beautifying the welding seam and saving the brazing filler metal.
Description
Technical Field
The utility model relates to the technical field of brazing, in particular to a laser resistance welding structure for eutectic brazing of copper and stainless steel parts.
Background
The silver-copper eutectic solder is also called as Ag72Cu28 solder, has a melting point of 779 ℃, has good solderability and good conductivity, does not contain volatile elements, and is suitable for soldering of electric vacuum devices;
the welding parts of the copper and stainless steel parts used on the electric vacuum device can adopt silver-copper eutectic brazing. Generally, the copper part is heated to be above the melting point of the brazing filler metal in the hydrogen protective atmosphere for brazing, the lower surface of the copper part is protected from oxidation in the hydrogen reducing atmosphere, but the stainless steel part material is still oxidized and is not infiltrated by the brazing filler metal in the hydrogen protective atmosphere, so a nickel layer with the thickness of 5-20um is electroplated on the outer surface of the stainless steel part material before brazing, and the nickel layer is ensured not to be oxidized in a hydrogen furnace at high temperature;
in actual production, because the nickel layer is very good to the infiltration nature of silver-copper brazing filler metal when high temperature, so during the welding, the brazing filler metal can flow the region beyond the welding seam, influences the outward appearance of brazing firstly, and secondly also makes the brazing filler metal demand increase, causes the waste.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a laser solder mask structure for eutectic brazing of copper and stainless steel parts, which aims to solve the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a structure is hindered with brazed laser of stainless steel part silver-copper eutectic solder to copper, includes stainless steel part, nickel plating helps the layer, hinders solder strip, solder welding seam one, solder welding seam two and anaerobic copper, the outer wall surface of stainless steel part is provided with the nickel plating and helps the layer, two through-holes have been seted up on the outer wall surface of stainless steel part, anaerobic copper welding is in the through-hole to form solder welding seam one with the inner wall of through-hole, anaerobic copper forms solder welding seam two with the outer wall of stainless steel part simultaneously solder welding seam one and solder welding seam two's outside laser marking hinders solder strip.
Preferably, the first brazing filler metal welding seam and the second brazing filler metal welding seam are arc-shaped.
Preferably, the width of the solder mask strip is 0.2-0.5 mm.
Preferably, one of the through holes is located at the center of the upper surface of the stainless steel part, and the other through hole is located at the corner of the stainless steel part.
Compared with the prior art, the utility model has the beneficial effects that: the laser solder mask structure for eutectic brazing of copper and stainless steel parts and silver and copper adopts laser to make parts with nickel plated have solder mask zones (nickel-free zones) of 0.2-0.5mm formed at the outer edges of the welding seams before brazing, so that the brazing filler metal at high temperature cannot flow to other places, thereby achieving the purposes of beautifying the welding seams and saving the brazing filler metal.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of a stainless steel part of the present invention;
FIG. 3 is a top view of a stainless steel part of the present invention;
FIG. 4 is a schematic view of an uncontrolled spreading structure of silver-copper solder in the prior art of the present invention
Fig. 5 is a top view of the uncontrolled propagation of silver-copper solder in the prior art of the present invention.
In the figure: 1. stainless steel parts, 2, a nickel plating welding-assistant layer, 3, a welding-resistant belt, 4, a first brazing filler metal welding line, 5, a second brazing filler metal welding line, 6 and oxygen-free copper.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a laser resistance welding structure for silver-copper eutectic brazing of copper and stainless steel parts comprises a stainless steel part 1, a nickel-plating welding-assisting layer 2, a resistance welding belt 3, a first brazing filler metal welding line 4, a second brazing filler metal welding line 5 and oxygen-free copper 6, wherein the nickel-plating welding-assisting layer 2 is arranged on the surface of the outer wall of the stainless steel part 1, two through holes are formed in the surface of the outer wall of the stainless steel part 1, one through hole is located in the center of the upper surface of the stainless steel part 1, the other through hole is located at the edge of the stainless steel part 1, the oxygen-free copper 6 is welded in the through holes and forms the first brazing filler metal welding line 4 together with the inner wall of the through holes, the oxygen-free copper 6 and the outer wall of the stainless steel part 1 form the second brazing filler metal welding line 5, the first brazing filler metal welding line 4 and the second brazing filler metal welding line 5 are arc-shaped, the laser resistance welding belt is marked outside the first brazing filler metal welding line 4 and the second brazing filler metal welding line 5, and the width of the resistance welding belt 3 is 0.2-0.5 mm.
The detailed connection means is a technique known in the art, and the following mainly describes the working principle and process, and the specific operation is as follows.
After the stainless steel part 1 is plated with nickel, a solder mask strip 3 (a nickel-free layer strip) with the width of 0.2-0.5mm is marked by laser on the outer ring of the hole on the two sides and then is brazed, and the silver-copper brazing filler metal prevents the brazing filler metal from flowing outwards due to the existence of the solder mask strip 3 on the nickel-plating welding-assistant layer 2, so that the problem of appearance is well solved, the demand of the brazing filler metal is reduced at the same time, and the production cost is saved.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "two ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated; also, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," "fixedly mounted," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a structure is welded to laser of copper and stainless steel part silver-copper eutectic brazing which characterized in that: include stainless steel part (1), nickel plating help weld layer (2), hinder and weld area (3), brazing filler metal welding seam (4), brazing filler metal welding seam two (5) and anaerobic copper (6), the outer wall surface of stainless steel part (1) is provided with nickel plating and helps weld layer (2), two through-holes have been seted up on the outer wall surface of stainless steel part (1), anaerobic copper (6) welding is in the through-hole to form brazing filler metal welding seam one (4) with the inner wall of through-hole, anaerobic copper (6) and the outer wall of stainless steel part (1) form brazing filler metal welding seam two (5) simultaneously brazing filler metal welding seam one (4) and the outside laser marking of brazing filler metal welding seam two (5) hinder and weld the area.
2. The laser solder mask structure for eutectic brazing of copper and stainless steel parts and silver and copper according to claim 1, wherein the laser solder mask structure comprises: the first brazing filler metal welding line (4) and the second brazing filler metal welding line (5) are arc-shaped.
3. The laser solder mask structure for eutectic brazing of copper and stainless steel parts and silver and copper according to claim 1, wherein the laser solder mask structure comprises: the width of the solder strip (3) is 0.2-0.5 mm.
4. The laser solder mask structure for eutectic brazing of copper and stainless steel parts and silver and copper according to claim 1, wherein the laser solder mask structure comprises: one through hole is located at the center of the upper surface of the stainless steel part (1), and the other through hole is located at the corner of the stainless steel part (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123389644.9U CN216706393U (en) | 2021-12-29 | 2021-12-29 | Laser resistance welding structure for eutectic brazing of copper and stainless steel part silver and copper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123389644.9U CN216706393U (en) | 2021-12-29 | 2021-12-29 | Laser resistance welding structure for eutectic brazing of copper and stainless steel part silver and copper |
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| CN216706393U true CN216706393U (en) | 2022-06-10 |
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| CN202123389644.9U Active CN216706393U (en) | 2021-12-29 | 2021-12-29 | Laser resistance welding structure for eutectic brazing of copper and stainless steel part silver and copper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117066627A (en) * | 2023-09-26 | 2023-11-17 | 俐玛精密测量技术(苏州)有限公司 | Method for directly brazing stainless steel by silver-copper 28 solder |
-
2021
- 2021-12-29 CN CN202123389644.9U patent/CN216706393U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117066627A (en) * | 2023-09-26 | 2023-11-17 | 俐玛精密测量技术(苏州)有限公司 | Method for directly brazing stainless steel by silver-copper 28 solder |
| CN117066627B (en) * | 2023-09-26 | 2024-04-26 | 俐玛精密测量技术(苏州)有限公司 | Method for directly brazing stainless steel by silver-copper 28 solder |
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