阅读说明：本技术 钎焊焊丝、钎焊焊丝成型方法及钎焊焊丝成型模具 (Brazing welding wire, brazing welding wire forming method and brazing welding wire forming die ) 是由 钟素娟 龙伟民 裴夤崟 张雷 李秀朋 沈元勋 李云月 王路乙 于 2021-04-25 设计创作，主要内容包括：本发明涉及钎焊焊丝、钎焊焊丝成型方法及钎焊焊丝成型模具。钎焊焊丝,包括：钎料管,具有内腔；钎剂,填充在钎料管的内腔中；所述钎料管的外周面上设有沟槽,沟槽沿钎料管轴线延伸,或者绕钎料管轴线螺旋延伸。钎焊焊丝成型模具,包括模体,模体内设有成型腔；所述成型腔的内壁上设有凸起,在钎焊焊丝从成型模具中通过时,凸起用于在钎料管的外周面上形成沟槽。钎焊焊丝成型方法,包括以下步骤：使钎料管从成型模具中通过,依靠成型模具的成型腔内壁上设置的凸起使钎料管外周面上形成沟槽,沟槽沿钎料管轴线延伸,或者绕钎料管轴线螺旋延伸。上述方案能够提高钎焊焊丝的钎剂熔化速率,减少钎焊流铺时间,提高焊接质量。(The invention relates to a brazing welding wire, a brazing welding wire forming method and a brazing welding wire forming die. A brazing wire, comprising: the brazing pipe is provided with an inner cavity; the brazing flux is filled in the inner cavity of the brazing filler metal pipe; the peripheral surface of the brazing filler metal pipe is provided with a groove, and the groove extends along the axis of the brazing filler metal pipe or extends spirally around the axis of the brazing filler metal pipe. The brazing welding wire forming die comprises a die body, wherein a forming cavity is arranged in the die body; the inner wall of the forming cavity is provided with a bulge, and when the brazing welding wire passes through the forming die, the bulge is used for forming a groove on the peripheral surface of the brazing filler metal pipe. The brazing welding wire forming method comprises the following steps: the brazing filler metal pipe passes through the forming die, a groove is formed on the outer peripheral surface of the brazing filler metal pipe by virtue of a bulge arranged on the inner wall of a forming cavity of the forming die, and the groove extends along the axis of the brazing filler metal pipe or spirally extends around the axis of the brazing filler metal pipe. The scheme can improve the flux melting rate of the brazing welding wire, reduce the brazing flow laying time and improve the welding quality.)

1. A brazing wire, comprising:

a brazing pipe (11) having an inner cavity;

the brazing flux (12) is filled in the inner cavity of the brazing material pipe (11);

it is characterized in that the preparation method is characterized in that,

the outer circumferential surface of the brazing material pipe (11) is provided with a groove (13), and the groove (13) extends along the axis of the brazing material pipe (11) or extends spirally around the axis of the brazing material pipe (11).

2. Brazing wire according to claim 1, wherein said groove (13) is V-shaped in cross-section.

3. The brazing wire as claimed in claim 2, wherein the depth of the groove (13) is 1/4 to 3/5 of the wall thickness of the brazing tube (11).

4. The brazing wire according to claim 1, 2 or 3, wherein said groove (13) is provided with more than 3 passages.

5. The brazing wire according to claim 1, 2 or 3, wherein each of said grooves (13) is circumferentially equispaced.

6. The brazing welding wire forming die is characterized by comprising a die body (21), wherein a forming cavity (22) is arranged in the die body (21);

and the inner wall of the forming cavity (22) is provided with a bulge (23), and when the brazing welding wire passes through the forming die, the bulge (23) is used for forming a groove (13) on the outer peripheral surface of the brazing filler metal pipe (11).

7. The brazing wire forming die of claim 6, wherein the cross-sectional shape of the projection (23) is V-shaped with the tip facing the center of the forming die.

8. The brazing wire forming die according to claim 6 or 7, wherein the projection (23) is provided with 3 or more.

9. The brazing welding wire forming method is characterized by comprising the following steps of:

the solder pipe (11) is made to pass through a forming die, a groove (13) is formed on the outer peripheral surface of the solder pipe (11) by virtue of a bulge (23) arranged on the inner wall of a forming cavity (22) of the forming die, and the groove (13) extends along the axis of the solder pipe (11) or spirally extends around the axis of the solder pipe (11).

10. The brazing wire forming method of claim 9, further comprising the steps of:

after the grooves (13) are formed in the brazing material pipe (11), the brazing material pipe (11) passes through a circular section forming die, and the opening of the groove (13) on the outer peripheral surface of the brazing material pipe (11) is narrowed, wherein the circular section forming die is a forming die with a circular forming cavity in cross section.

Technical Field

The invention relates to a brazing welding wire, a brazing welding wire forming method and a brazing welding wire forming die.

Background

In the brazing process, a brazing wire and a brazing flux are often needed, and the brazing flux can be spread on the surface of a workpiece after being melted, so that an oxide film on the surface of the workpiece is removed, and the brazing quality is improved.

For example, in the eyeglass industry, a pair of metal eyeglass frames generally comprises two or thirty parts, mainly comprising eyeglass legs, an eyeglass frame, a bridge, a hinge, a locking block, a nose pad, screws and the like, and brazing is a traditional connection mode of the eyeglass frames. At present, the annual output value of the spectacle industry in China is high, and the market demands at home and abroad are large, but most of products mainly adopt brass and zinc-copper-nickel low-grade materials. With the progress of the technology, the research on the performance of the metal material for high-grade glasses and the related manufacturing process thereof, particularly the high-quality welding material and the advanced process thereof which can be used for metal spectacle frames, is an important research direction for material workers. At present, when a spectacle frame is welded, soldering flux and brazing filler metal need to be added respectively, the problems of troublesome brazing operation, difficult homogenization of the using amount of the soldering flux, pollution of an eye frame by excessive soldering flux and the like exist, and the spectacle frame is difficult to clean after welding due to the structural influence of the spectacle frame.

Chinese patent publication No. CN102513726B discloses a silver-based flux-cored wire and a manufacturing method thereof, wherein a raw material of the wire is made into a rod shape, and the rod shape is heated and extruded into a hollow tube through a die cylinder of a pressurizing device to form a brazing pipe; and melting the flux powder into liquid state, and pressing into the hollow tube to obtain the welding wire with the flux core. The process is easy to accurately control the dosage of the brazing flux, can meet the requirement of alloy welding temperature matching, and is easy to clean after welding.

However, when brazing, heat for melting the brazing flux needs to be transferred from outside to inside through the hollow pipe, the melting rate of the brazing flux is slow, the time for spreading the brazing flux on the surface of a workpiece to remove an oxide film of the workpiece is long, and the welding quality is affected.

Disclosure of Invention

The invention aims to provide a brazing welding wire which can improve the melting rate of a brazing flux, reduce the brazing flow laying time and improve the welding quality. Meanwhile, the invention also provides a brazing welding wire forming method and a brazing welding wire forming die.

The brazing welding wire adopts the following technical scheme:

a brazing wire, comprising:

the brazing pipe is provided with an inner cavity;

the brazing flux is filled in the inner cavity of the brazing filler metal pipe;

the peripheral surface of the brazing filler metal pipe is provided with a groove, and the groove extends along the axis of the brazing filler metal pipe or extends spirally around the axis of the brazing filler metal pipe.

Has the advantages that: by adopting the technical scheme, the grooves which extend along the axis of the brazing filler metal pipe or spirally extend around the axis of the brazing filler metal pipe are arranged on the peripheral surface of the brazing filler metal pipe, so that the heat transfer distance can be reduced, the heat transfer area can be increased, compared with the prior art, the melting rate of the brazing flux can be increased, the brazing flow time can be shortened, and the welding quality can be improved.

As a preferred technical scheme: the cross section of the groove is V-shaped.

Has the advantages that: by adopting the technical scheme, the structure is simple, and the processing is convenient.

As a preferred technical scheme: the depth of the groove is 1/4-3/5 of the wall thickness of the brazing filler metal pipe.

Has the advantages that: by adopting the technical scheme, the heat conducting performance and the structural strength of the brazing material pipe can be balanced.

As a preferred technical scheme: the grooves are provided with more than 3 channels.

Has the advantages that: by adopting the technical scheme, the flux melting rate can be better ensured.

As a preferred technical scheme: the grooves are uniformly distributed along the circumferential direction.

Has the advantages that: by adopting the technical scheme, the heat transfer uniformity is good.

The brazing welding wire forming die adopts the following technical scheme:

the brazing welding wire forming die comprises a die body, wherein a forming cavity is arranged in the die body;

the inner wall of the forming cavity is provided with a bulge, and when the brazing welding wire passes through the forming die, the bulge is used for forming a groove on the peripheral surface of the brazing filler metal pipe.

Has the advantages that: by adopting the technical scheme, when the brazing welding wire passes through the forming die, the protrusions can form the grooves on the peripheral surface of the brazing material pipe, the grooves can reduce the heat transfer distance and improve the heat transfer area, and compared with the prior art, the method can improve the flux melting rate of the brazing welding wire, reduce the brazing flow time and improve the welding quality.

As a preferred technical scheme: the cross section of the protrusion is V-shaped, and the tip part faces the center of the forming die.

Has the advantages that: by adopting the technical scheme, the structure is simple, and the processing is convenient.

As a preferred technical scheme: the bulges are provided with more than 3 parts.

Has the advantages that: by adopting the technical scheme, more than 3 grooves can be formed on the brazing filler metal pipe, and the melting rate of the brazing flux is better ensured.

The forming method of the brazing welding wire adopts the following technical scheme:

the brazing welding wire forming method comprises the following steps:

the brazing filler metal pipe passes through the forming die, a groove is formed on the outer peripheral surface of the brazing filler metal pipe by virtue of a bulge arranged on the inner wall of a forming cavity of the forming die, and the groove extends along the axis of the brazing filler metal pipe or spirally extends around the axis of the brazing filler metal pipe.

Has the advantages that: by adopting the technical scheme, the grooves can be formed on the peripheral surface of the brazing filler metal pipe, the heat transfer distance can be reduced, and the heat transfer area can be increased.

As a preferred technical scheme: the method further comprises the following steps:

after the groove is formed in the brazing material pipe, the brazing material pipe passes through a circular section forming die, so that the opening of the groove in the peripheral surface of the brazing material pipe is narrowed, and the circular section forming die is a forming die with a circular cross section of a forming cavity.

Has the advantages that: by adopting the technical scheme, the brazing filler metal which is approximately circular can be formed, the influence of the groove on automatic brazing is avoided, and the automatic brazing is easy to realize.

For the subject to be protected by the present patent, each preferred technical solution under the same subject may be adopted alone, and when the preferred technical solutions under the same subject can be combined, two or more preferred technical solutions under the same subject may be arbitrarily combined, and the technical solutions formed by the combination are not specifically described here, and are included in the description of the present patent in this form.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment 1 of the brazing wire of the present invention;

FIG. 2 is a schematic cross-sectional view of embodiment 2 of the brazing wire of the present invention;

FIG. 3 is a schematic cross-sectional view of embodiment 1 of the brazing wire forming die of the present invention;

FIG. 4 is a schematic view of a forming process of embodiment 1 of the brazing wire forming method of the present invention;

FIG. 5 is a graph comparing the wetting effect of a braze wire without and with a groove;

the names of the components corresponding to the corresponding reference numerals in the drawings are: 11. a material brazing pipe; 12. soldering flux; 13. a trench; 21. a mold body; 22. a molding cavity; 23. and (4) protruding.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, which may be present in the embodiments of the present invention, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises an … …" is intended to indicate that there are additional elements of the same process, method, article, or apparatus that comprise the element.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

The present invention will be described in further detail with reference to examples.

Example 1 of the brazing wire of the present invention:

as shown in fig. 1, the brazing wire is used for welding glasses, and includes a brazing tube 11 and a brazing flux 12. The brazing filler metal pipe 11 is a seamless pipe and has an inner cavity, and the brazing filler metal 12 is filled in the inner cavity of the brazing filler metal pipe 11. The manner of manufacturing the brazing material pipe 11 and the manner of filling the brazing flux 12 are conventional techniques, and will not be described in detail in the present invention. In order to prevent moisture absorption of the flux 12 from affecting the activity of the flux 12, both ends of the flux pipe 11 are closed.

The special feature of the brazing welding wire is that the outer peripheral surface of the brazing filler metal pipe 11 is provided with a groove 13, and the cross section of the groove 13 is V-shaped and extends along the axis of the brazing filler metal pipe 11. In this embodiment, the grooves 13 are uniformly distributed in the circumferential direction, and the number of the grooves is 8. The depth of the groove 13 is 1/2 of the wall thickness of the brazing filler metal pipe 11, the opening width is 0.08h, h is the depth of the groove, the heat conducting performance and the structural strength of the brazing filler metal pipe 11 can be balanced, and the cross section is close to a circle. In a preferred embodiment, the depth of the groove 13 is 1/4 to 3/5 of the wall thickness of the solder tube 11, and the width of the groove 13 after closing is 0.01h to 0.12 h.

As shown in fig. 4, the method of forming the brazing wire is as follows, and this method is also embodiment 1 of the method of forming the brazing wire of the present invention.

Step one, pouring soldering flux 12 into a seamless brazing pipe 11;

and step two, the brazing filler metal pipe 11 filled with the brazing flux 12 passes through a wire drawing die shown in fig. 3, a continuous groove 13 is formed on the brazing filler metal pipe 11, the cross section of the groove 13 is V-shaped, the processing is convenient, and the subsequent diameter reduction is facilitated. The invention relates to a wire rod forming process by using a wire drawing die, which is a prior art and is characterized in that a bulge 23 is arranged on the inner wall of a forming cavity 22 of the wire drawing die, when a brazing welding wire passes through the wire drawing die, the bulge 23 enables a groove 13 to be formed on the outer peripheral surface of a brazing filler metal pipe 11 of the brazing welding wire, and the groove 13 extends along the axis of the brazing filler metal pipe 11;

and step three, after the groove 13 is formed in the brazing welding wire, the brazing welding wire passes through a circular section forming die, the diameter of the brazing filler metal pipe 11 is reduced, and the opening of the groove 13 on the outer peripheral surface of the brazing filler metal pipe 11 is narrowed. The circular section forming die is a common wire drawing die, and the cross section of the forming cavity 22 is circular.

The principle of the traditional brazing process is that a brazing flux is firstly melted to remove an oxide film of a base metal, then a brazing filler metal is melted to wet the base metal, and the melting temperature of the brazing flux is generally about 30 ℃ lower than that of the brazing filler metal. The activity of the brazing flux directly influences the flow and spreading of the brazing filler metal, and further influences the brazing effect. The heat transfer mode to the soldering wire in the soldering process has three modes of heat conduction, convection and radiation, and no matter which heating mode is adopted, the heat is transferred to the soldering flux through the brazing filler metal on the surface. In the case that the melting temperatures of the brazing filler metal and the soldering flux are different by about 30 ℃, there is a possibility that the brazing filler metal is melted first or the brazing filler metal and the soldering flux are melted simultaneously, and the soldering flux has no time to remove the oxide film of the base metal at this time, which affects the spreading of the soldering flux, as shown in fig. 5 a. In the glasses welding wire with the groove, the groove is formed in the surface of the brazing filler metal, the thickness of the brazing filler metal skin at the groove is reduced, heat can be quickly transferred to the brazing flux during brazing heating, the brazing flux is melted faster than the brazing filler metal, the base metal oxide film is quickly removed by the brazing flux, and the flowing and laying effect is good after the brazing filler metal is melted, as shown in figure 5 b. Wetting conditions of fig. 5: the brazing wire is Ag40Cu19Zn21Cd, the weight is 0.2g, the temperature is 700 ℃, and the time is 5 min.

The soldering wire not only facilitates the automatic welding of the glasses, but also can realize soldering connection with the least soldering flux, and can accurately control the dosage of the soldering flux to achieve the purpose of protecting the environment.

Example 2 of the brazing wire of the present invention:

the difference from example 1 is that in this example, as shown in fig. 2, the groove 13 on the outer peripheral surface of the brazing filler metal pipe 11 is wide, and the diameter reduction treatment in the third step is not performed.

Example 1 of the brazing wire forming die of the present invention:

as shown in FIG. 3, the forming mold for the brazing wire has a protrusion 23 on the inner wall of the forming cavity 22, and the protrusion 23 is used to form a groove 13 on the outer circumferential surface of the brazing wire tube 11 when the brazing wire passes through the forming mold.

Example 2 of the brazing wire forming method of the present invention:

the difference from embodiment 1 is that this embodiment includes only steps one and two of embodiment 1, and does not include the reducing process of step three.

Example 3 of the brazing wire forming method of the present invention:

the difference from embodiment 1 or 2 is that in this embodiment, the brazing material pipe 11 is first treated separately in the first and second steps, and finally the brazing flux 12 is poured.

In the above-mentioned embodiment of the brazing wire, the cross section of the groove 13 is V-shaped, and in other embodiments of the brazing wire, the cross section of the groove 13 may be other shapes, such as U-shaped, circular arc, trapezoid, etc. Correspondingly, in other embodiments of the brazing wire forming mold, the protrusion 23 on the inner wall of the forming cavity 22 may have other shapes, such as U-shape, circular arc shape, trapezoid shape, etc.

In other embodiments of the brazing wire, the number of the grooves 13 may be increased or decreased, for example, 3, 4, 5, 6, 7, 9, or 10 grooves may be provided, or only 1 or 2 grooves may be provided. Correspondingly, in other embodiments of the brazing wire forming mold, the protrusions 23 on the inner wall of the forming cavity 22 may be provided at 3, 4, 5, 6, 7, 9, 10, etc., or only at 1 or 2.

The above description is only a preferred embodiment of the present application, and not intended to limit the present application, the scope of the present application is defined by the appended claims, and all changes in equivalent structure made by using the contents of the specification and the drawings of the present application should be considered as being included in the scope of the present application.