CN109483082B - Coating welding ring and preparation method thereof - Google Patents
Coating welding ring and preparation method thereof Download PDFInfo
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- CN109483082B CN109483082B CN201811187577.2A CN201811187577A CN109483082B CN 109483082 B CN109483082 B CN 109483082B CN 201811187577 A CN201811187577 A CN 201811187577A CN 109483082 B CN109483082 B CN 109483082B
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- flux
- filler metal
- welding ring
- brazing
- brazing filler
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- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3006—Ag as the principal constituent
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The application relates to a coating welding ring and a preparation method thereof, the coating welding ring comprises brazing filler metal and brazing flux, the brazing filler metal is annular, and the brazing flux is bonded on the surface of the brazing filler metal through a binder to form a layer of uniform coating. The adhesive is a mixture of polyurethane and a diluent, the diluent is one or more of butyl acetate, acetone and dimethyl carbonate, wherein the polyurethane accounts for 80-90% of the total mass of the adhesive, and the diluent accounts for 10-20% of the total mass of the adhesive. The preparation method of the coating welding ring comprises the following steps: forming a uniform binder layer on the surface of the brazing filler metal; the brazing flux is bonded on the brazing filler metal stained with the binder to form a semi-finished product of the flux-cored welding ring; and heating, polishing, fixing and molding the semi-finished product of the flux-cored welding ring. This application structure is succinct, and the coating adhesion is strong, and the even fine and close of outward appearance after the processing of cubic unit vibrations grinding machine, thickness stability is good, and the coating welding ring is easily assembled and is used.
Description
Technical Field
The application relates to a coating welding ring with strong coating adhesion and a preparation method thereof.
Background
Brazing refers to a welding method in which brazing filler metal lower than the melting point of a weldment and the weldment are heated to the melting temperature of the brazing filler metal at the same time, and then the liquid brazing filler metal is used for filling gaps of solid workpieces to connect metals. At present, the medium-temperature brazing filler metal mainly used in the market comprises copper-based brazing filler metal, silver brazing filler metal and the like. Most of silver solder is matched with soldering flux when in use, the soldering flux can play roles of activating the surface, avoiding oxidation and the like when in welding, and better welding effect can be obtained when in use.
When most of the phosphorus-containing copper-based brazing filler metal is used, the phosphorus element has a self-brazing effect, so that the copper-based brazing filler metal can be used without being matched with a brazing flux to finish welding during welding. However, when a copper-based brazing filler metal containing phosphorus is used for carrying out narrow welding seams with high requirements on fluidity and surface quality, problems of lack of welding, insufficient penetration and the like are caused due to insufficient fluidity and wettability of the brazing filler metal, and the product reject ratio is over-high.
At present, the soldering flux is mainly used by manually smearing the soldering flux on a welding part, so that the welding process is complicated, the use rate of smearing the soldering flux is low, redundant soldering flux can cause pollution, and the environment is influenced. In addition to these problems, the uncertainty of the operation of the flux applicator can also lead to welding problems.
In order to improve the welding efficiency and stability and reduce the environmental pressure caused by welding, the prior composite brazing filler metal such as flux core, coating and the like is widely valued and developed. However, the flux coating brazing filler metal produced on the market at present has poor adhesion capability of the surface flux coating, and in the transportation process, the surface flux coating is lost due to collision, so that when the flux coating brazing filler metal is used by customers, the flux of the brazing flux coating on the surface of a welding ring is insufficient, and a large number of defective products are produced.
Disclosure of Invention
The technical problem solved by the application is to overcome the defects in the prior art, and provide the coating welding ring with strong coating adhesion and the preparation method thereof. The welding ring has strong adhesive force of the coating, small coating loss in the transportation process, good welding stability and good fluidity, and can improve the qualification rate and welding efficiency of narrow weld brazing. Is particularly suitable for high-frequency induction brazing.
The technical scheme adopted by the invention for solving the technical problems comprises the following steps:
the flux-cored welding ring comprises brazing filler metal and brazing flux, and is characterized in that the flux-cored welding ring is formed by bonding the brazing filler metal and the brazing flux.
The brazing filler metal is annular and is located the inlayer, and the surface of brazing filler metal evenly forms (soaks, coats or other modes) the binder, and the brazing flux covers and forms the outer layer (coating) of coating welding ring on the binder.
The technical solution adopted by the present invention to solve the above technical problems further includes:
a preparation method of a coating welding ring is characterized by comprising the following steps:
forming a uniform binder layer on the surface of the brazing filler metal ring;
the brazing flux is attached to the brazing filler metal ring stained with the binder to form a semi-finished product of a flux-coated welding ring;
the semi-finished product of the flux-cored welding ring (the brazing filler metal ring dipped with the brazing flux and the binder) is heated, polished, fixed and molded.
The binder is uniformly distributed on the surface of the brazing filler metal ring, so that the brazing flux bonded on the brazing filler metal ring through the binder has better adhesion performance compared with the brazing flux directly coated on the brazing filler metal ring through the surface, the falling of the brazing flux can be reduced in the product transportation process, the uniform brazing flux is still arranged on the surface of the welding ring during welding, and the welding stability is ensured.
Through heating polishing fixed shaping to the brazing filler metal ring of bonding brazing flux, can guarantee that the binder is complete dry to further improve the stability of coating welding ring size, and weld the ring size influence and weld ring welding assembly, the stable-in-size can reduce the snap ring, and reduce the fit-up gap, improve welding effect, reduce the welding defective rate.
And (3) forming a uniform binder layer on the surface of the brazing filler metal ring: covering the prepared binder on the solder ring to form a uniform binder layer on the surface of the solder ring.
The adhesive is a mixture of polyurethane and a diluent, the diluent is one or more of butyl acetate, acetone and dimethyl carbonate, wherein the polyurethane accounts for 80-90% of the total mass of the mixture, and the diluent accounts for 10-20% of the total mass of the mixture.
After the binder is prepared, the binder can be used after being uniformly stirred. In order to make the binder more uniform, the binder may be heated to 80 degrees celsius and mixed uniformly.
The solder ring can be sprayed or dipped to form a binder layer on the surface of the solder ring. The spraying mode can be as follows: and flatly paving the brazing filler metal ring with a clean surface on a flat plate, and spraying the binder on the brazing filler metal ring by using an atomizing spray gun, or placing the brazing filler metal ring in a vibrating machine, and spraying the binder on the vibrating brazing filler metal ring.
The dipping method comprises the following specific steps: completely immersing the brazing filler metal ring with a clean surface into the prepared binder, taking out the brazing filler metal ring from the binder until the binder does not drip, wherein the soaking time of the brazing filler metal ring is required to ensure that the binder is uniformly distributed on the surface of the taken brazing filler metal ring, generally 1-10 minutes, and the two modes can ensure that the binder is uniformly adhered to the surface of the brazing filler metal ring and prepare for the adhesion of a brazing flux.
The flux adheres to the binder impregnated solder ring: and rolling and contacting the brazing filler metal ring with the binder on the surface in the brazing filler metal powder, and attaching the brazing filler metal to the brazing filler metal ring to obtain a semi-finished product with the brazing filler metal.
The brazing flux is FB105 brazing flux corresponding to the silver-based brazing filler metal. The optimized brazing flux needs to be subjected to refining treatment, and the refining treatment can be carried out by ball milling for 24 hours by adopting a planetary ball mill and sieving by a 200-mesh sieve.
The rolling contact of the brazing filler metal ring and the brazing filler metal can be realized by mixing the brazing filler metal ring and the brazing filler metal and putting the mixture into a centrifugal machine for rotation. Preferably, the drill rod ring and the brazing flux are mixed and then rotated by using a low-speed centrifuge, and the rotating speed is not higher than 500 revolutions per minute. The surface of each brazing filler metal ring can be fully contacted with the brazing flux by adopting rolling contact, so that the brazing flux is uniformly adhered to the surface, the surface brazing flux layer is firmer by utilizing rolling and beating of the brazing filler metal rings, and the adhesiveness of the brazing flux is further improved.
Fixing and forming a coating welding ring: in order to ensure the adhesion performance of the coating welding ring and manufacture the coating welding ring with stable size to adapt to the assembly of customers. The surface of the semi-finished product of the flux-cored welding ring needs to be polished. In order to make the soldering flux have better adhesive property, the semi-finished product of the flux-cored welding ring can be heated, and the heating temperature is 40-100 ℃.
Polishing can be realized by putting the semi-finished product of the flux-cored welding ring and ball-milling beads (polished beads) into a three-dimensional vibration grinding machine for vibration grinding, wherein the mass ratio of the ball-milling beads to the semi-finished product of the flux-cored welding ring is 1: 2 to 1: 1. In order to ensure that the surface of the welding ring of the coating is uniform and compact, hot air can be blown in during grinding, and the temperature of the hot air is controlled to be 40-100 ℃.
Preferably, the ball milling beads are zirconia balls, the diameter of each ball milling bead is one half of the inner diameter of the flux-cored welding ring, and the ball milling beads can penetrate through the inner ring of the flux-cored welding ring and can synchronously realize the polishing effect on the surfaces of the inner ring and the outer ring of the flux-cored welding ring. In the vibration process of the ball grinding ball and the flux coating welding ring, the ball grinding ball collides with the flux coating layer on the surface of the flux coating welding ring, so that the brazing flux is further compacted, the adhesiveness of the brazing flux is improved, and the loss rate is reduced.
The coating welding ring and the preparation method thereof provided by the invention have the advantages of simple structure, strong coating binding power, uniform and compact appearance after being processed by a three-dimensional vibration grinding machine, good adhesion and thickness stability, and easy assembly and use.
Detailed Description
Example 1:
1) polyurethane, butyl acetate 3, acetone 3, dimethyl carbonate in a ratio of 85%: 3%: 3%: 9 percent of the mixture is mixed according to the mass ratio, heated to 80 ℃ and stirred to form a binder;
2) soaking the brazing filler metal ring in the binder for 5 minutes and then taking out;
3) pouring the brazing flux ring and FB105 brazing flux into a low-speed centrifuge, wherein the mass of the brazing flux is one tenth of that of the brazing flux, and the centrifuge runs for 3 minutes at the rotating speed of 500 revolutions per minute;
4) and (3) putting the semi-finished product (the semi-finished product of the coating welding ring, the same below) into a three-dimensional vibration grinding machine, adding zirconia ball grinding beads, blowing hot air into the ball grinding beads, and taking out the ball grinding beads after 5 minutes, wherein the mass of the ball grinding beads is one half of that of the brazing filler metal.
Example 2:
1) the polyurethane and acetone were mixed in a 90%: synthesizing 10% of the binder by mass and uniformly stirring;
2) placing the brazing filler metal ring in a vibrating machine, starting the vibrating machine, spraying the prepared binder, and taking out after 5 minutes;
3) pouring the brazing flux ring and FB105 brazing flux into a low-speed centrifuge, wherein the mass of the brazing flux is one tenth of that of the brazing flux, and the centrifuge runs for 3 minutes at the rotating speed of 500 revolutions per minute;
4) and (3) putting the semi-finished product into a three-dimensional vibration grinder, adding zirconia ball grinding beads, blowing hot air into the ball grinding beads, and taking out the semi-finished product after 5 minutes, wherein the mass of the ball grinding beads is one half of that of the brazing filler metal ring.
Example 3:
1) the polyurethane and dimethyl carbonate were mixed in a ratio of 85%: 15 percent of the raw materials are synthesized into a binder;
2) soaking the brazing filler metal ring in the binder for 5 minutes and then taking out;
3) pouring the brazing filler metal ring and FB105 brazing flux into a low-speed centrifuge, wherein the mass of the brazing filler metal is one fifth of that of the brazing filler metal, and the centrifuge runs for 3 minutes at the rotating speed of 500 revolutions per minute;
4) and (3) putting the semi-finished product into a three-dimensional vibration grinder, adding zirconia ball grinding beads, blowing hot air into the ball grinding beads with the same mass as that of the brazing filler metal, and taking out the semi-finished product after 5 minutes.
All simple variations and combinations of the technical features and technical solutions of the present application are considered to fall within the scope of the present application.
Claims (11)
1. The utility model provides a coating welding ring, includes brazing filler metal and brazing flux, the brazing filler metal is cyclic annular, and the brazing flux bonds on the brazing filler metal by the binder on brazing filler metal surface, forms the even coating of one deck, characterized by on brazing filler metal surface: the adhesive is a mixture of polyurethane and a diluent, the diluent is one or more of butyl acetate, acetone and dimethyl carbonate, wherein the polyurethane accounts for 80-90% of the total mass of the adhesive, and the diluent accounts for 10-20% of the total mass of the adhesive.
2. The method for preparing a flux cored welding ring as set forth in claim 1, comprising the steps of:
forming a uniform binder layer on the surface of the brazing filler metal;
the brazing flux is bonded on the brazing filler metal stained with the binder to form a semi-finished product of the flux-cored welding ring;
and heating, polishing, fixing and molding the semi-finished product of the flux-cored welding ring.
3. The method for preparing a flux-cored welding ring as set forth in claim 2, wherein: the uniform binder layer on the surface of the brazing filler metal is formed by spraying or dipping.
4. The method for preparing a flux cored welding ring as set forth in claim 3, wherein: the spraying mode is as follows: the binder is sprayed onto the solder ring in a static or vibrating state using an atomizing spray gun.
5. The method for preparing a flux cored welding ring as set forth in claim 3, wherein: the dipping mode is as follows: and completely immersing the brazing filler metal ring with a clean surface into the binder, wherein the immersion time of the brazing filler metal ring is 1-10 minutes.
6. The method of making a flux cored welding ring as recited in claim 2, wherein said step of adhering said flux to said binder-impregnated filler metal comprises the steps of: and placing the brazing filler metal with the surface adhered with the binder in the brazing flux powder to be in rolling contact, so that the brazing flux is attached to the brazing filler metal.
7. The method for preparing a flux-cored welding ring as set forth in claim 6, wherein: the step of rolling and contacting the brazing filler metal with the surface adhered with the binder in the brazing flux is realized by mixing the brazing filler metal with the surface adhered with the binder and brazing flux powder and putting the mixture into a centrifuge for rotation.
8. The method for preparing a flux-cored welding ring as set forth in claim 2, wherein: the heating, polishing, fixing and forming step of the semi-finished product of the flux-cored welding ring comprises the following steps: putting the semi-finished product of the flux-cored welding ring and the ball-milling beads into a vibration grinding machine for vibration grinding; blowing hot air while vibrating and grinding, wherein the temperature of the hot air is controlled to be 40-100 ℃.
9. The method for preparing a flux cored welding ring as set forth in claim 8, wherein: the mass ratio of the ball grinding bead to the semi-finished product of the coating welding ring is 1: 2 to 1: 1.
10. The method for preparing a flux cored welding ring as set forth in claim 8, wherein: the ball milling beads are zirconia ball milling beads.
11. The method for preparing a flux cored welding ring as set forth in claim 8, wherein: the diameter of the ball milling bead is one half of the inner diameter of the flux-cored welding ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811187577.2A CN109483082B (en) | 2018-10-12 | 2018-10-12 | Coating welding ring and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811187577.2A CN109483082B (en) | 2018-10-12 | 2018-10-12 | Coating welding ring and preparation method thereof |
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| CN109483082A CN109483082A (en) | 2019-03-19 |
| CN109483082B true CN109483082B (en) | 2021-08-06 |
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| CN111230359A (en) * | 2020-03-09 | 2020-06-05 | 浙江新锐焊接科技股份有限公司 | Bonding system for brazing flux and application thereof |
| CN114799617B (en) * | 2022-05-20 | 2023-09-12 | 南京航空航天大学 | Smokeless skin brazing filler metal and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6070789A (en) * | 1997-11-18 | 2000-06-06 | S. A. Day Mfg. Co., Inc. | Method for soldering aluminum and soldering rod therefor |
| CN102191006A (en) * | 2010-03-15 | 2011-09-21 | 张耀华 | Production method of polyurethane adhesive |
| CN202804495U (en) * | 2012-10-25 | 2013-03-20 | 浙江机电职业技术学院 | Brazing filler metal coated with coating |
| CN106031962A (en) * | 2015-03-10 | 2016-10-19 | 孙韶 | A braze welding ring coated with a brazing flux coating |
| CN104907721B (en) * | 2015-05-25 | 2017-11-28 | 郑州机械研究所 | Efficient flux coated brazingrod with strong adhesive force |
| CN108145341B (en) * | 2017-12-29 | 2021-08-24 | 江苏九洲新材料科技有限公司 | Heat-resistant welding rod with excellent crack resistance |
| CN108212583B (en) * | 2018-02-07 | 2023-09-26 | 郑州机械研究所有限公司 | Special spraying device for coating brazing filler metal rings and preparation method |
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