Composite brazing filler metal preparation equipment and composite brazing filler metal particles

Abstract

The utility model relates to the field of solder forming equipment, in particular to composite solder preparation equipment and composite solder particles. The composite brazing filler metal preparation equipment comprises a blank machining mechanism, a brazing flux feeding mechanism, a pressurizing mechanism and a conveying mechanism. The conveying mechanism comprises a mold tray and a conveying device, and a casting station, a feeding station and a pressurizing station are sequentially arranged on a conveying path of the conveying device; the blank machining mechanism is located at the casting station so as to cast brazing filler metal into the mold charging tray to form a brazing filler metal blank. The brazing flux feeding mechanism is located at the feeding station so as to feed brazing flux powder to the brazing filler metal blank in the mold charging tray; and the pressurizing mechanism is located at the pressurizing station so as to press the brazing flux powder and the brazing filler metal blank in the mold charging tray to form the composite brazing filler metal. According to the composite brazing filler metal preparation equipment, automatic production of composite brazing filler metal particles can be achieved, the material ratio is accurate, and the production efficiency is high; and the prepared composite brazing filler metal particles can be automatically fed, so that the production efficiency of an industrial chain is improved.

Description

Technical Field

[0001] This application relates to the field of solder forming equipment, and in particular to a composite solder preparation equipment and composite solder particles. Background Technology

[0002] In the traditional brazing process of cemented carbide tools such as coal cutting teeth and tunneling teeth, button-shaped filler metal and paste flux are usually added separately. This method has problems such as complex operation, high dependence on experience, and large amounts of flux residue after welding, which affect the stability of the brazed joint and the reliability of the workpiece. By coating the filler metal particles with paste flux to form a flux coating, the flux can be added synergistically to achieve the desired brazing process. This reduces the amount of filler metal and flux used, improves the traditional brazing process, and has a series of advantages such as convenient operation, high brazing efficiency, stable weld quality, and good weld reliability.

[0003] Currently, when brazing tools such as coal cutting teeth and tunneling teeth, the method of manually applying paste flux to the solder is still used. The amount of solder paste added is not fixed or accurate, which also leads to waste of flux and low efficiency. Utility Model Content

[0004] The purpose of this application is to provide a composite brazing filler metal preparation device and composite brazing filler metal particles for preparing composite brazing filler metal particles that are placed in the groove of the coal cutting tooth base. The material ratio is accurate, the production efficiency is high, and the automated feeding of composite brazing filler metal can be realized.

[0005] This application provides a composite brazing filler metal preparation device, including a blank processing mechanism, a flux feeding mechanism, a pressurizing mechanism, and a conveying mechanism;

[0006] The conveying mechanism includes a mold material tray and a conveying device. The conveying device has a casting station, a feeding station and a pressurizing station arranged sequentially on its conveying path. The conveying device is used to convey the mold material tray sequentially to the casting station, the feeding station and the pressurizing station.

[0007] The blank processing mechanism is located at the casting station to cast the brazing filler metal into the mold tray to form a brazing filler metal blank; the flux feeding mechanism is located at the feeding station to feed flux powder onto the brazing filler metal blank in the mold tray; the pressurizing mechanism is located at the pressurizing station to press the flux powder and the brazing filler metal blank in the mold tray to form a composite brazing filler metal.

[0008] In the above technical solution, the mold material tray further includes a casting material tray and a composite material tray;

[0009] The conveying device is used to convey the casting tray to the casting station. The casting tray is provided with multiple casting grooves. The bottom of the casting groove is provided with a contraction section so that the brazing filler blank forms a pointed structure at the position corresponding to the bottom of the groove.

[0010] The composite material tray is provided with multiple receiving slots, each corresponding to a casting tank. The brazing filler blank formed in the receiving slot can be flipped into the receiving slot. The conveying device is used to convey the composite material tray to the feeding station and the pressurizing station.

[0011] In the above technical solution, further, a plurality of the casting groove arrays are arranged on the casting tray; a plurality of the receiving groove arrays are arranged on the composite tray.

[0012] In the above technical solution, the conveying device further includes a first conveyor belt and a second conveyor belt;

[0013] The casting station is located on the conveying path of the first conveyor belt, which is used to transport the casting material tray; the feeding station and the pressurizing station are located on the conveying path of the second conveyor belt, which is used to transport the composite material tray.

[0014] The first conveyor belt has a higher transport height than the second conveyor belt, and the tail end of the first conveyor belt is opposite to the head end of the second conveyor belt, so that the casting tray flips at the tail end of the first conveyor belt and is fastened to the composite tray located at the head end of the second conveyor belt.

[0015] In the above technical solution, the flux feeding mechanism further includes a feeding container and a recycling container;

[0016] The feeding container is used to load flux powder; the feeding container is located above the second conveyor belt, and the bottom of the feeding container is provided with a feeding port to feed the flux powder into the composite material tray;

[0017] The recycling container is located below the second conveyor belt to collect the scattered flux powder.

[0018] In the above technical solution, the billet processing mechanism further includes a melting furnace;

[0019] The smelting furnace is used to load molten brazing filler metal; the smelting furnace is located above the first conveyor belt, and the bottom of the smelting furnace is provided with a discharge port to deliver the molten brazing filler metal to the casting tray.

[0020] In the above technical solution, the billet processing mechanism further includes a gas protection chamber;

[0021] The protective gas chamber is installed at the discharge port to release protective gas during the casting process.

[0022] In the above technical solution, the pressurizing mechanism further includes a stamping machine and an injection pipe;

[0023] The press is used to press the flux powder and the filler blank in the mold tray to form a composite filler metal; the injection pipe is connected to the press hammer to inject adhesive into the mold tray.

[0024] The above technical solution further includes a pre-feeding mechanism, which is used to feed a protective agent into the empty mold tray.

[0025] This application also provides a composite solder particle, including a flux layer, a solder layer and a protective agent layer;

[0026] The solder layer is located between the flux layer and the protective agent layer, and the solder layer forms a tapered tip structure facing one side of the flux layer.

[0027] Compared with the prior art, the beneficial effects of this application are as follows:

[0028] The composite brazing filler metal preparation equipment provided in this application can realize the automated production of composite brazing filler metal particles with accurate material ratio and high production efficiency; moreover, the prepared composite brazing filler metal particles can also be automatically fed, improving the production efficiency of the industrial chain.

[0029] This application also provides composite brazing filler metal particles, which melt faster than traditional brazing filler metals and flow first compared to traditional composite brazing filler metal products. The overall melting time is shortened, which can effectively reduce oxidation and improve welding quality. Moreover, composite brazing filler metal particles do not contain toxic chemical solvents or adhesives, which can effectively reduce pollutant emissions and reduce harm to operators and the environment. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the composite solder preparation equipment provided in this application;

[0032] Figure 2 This is a first structural schematic diagram of the casting tray provided in this application;

[0033] Figure 3 A first structural schematic diagram of the composite tray provided in this application;

[0034] Figure 4 This is a schematic diagram of the second structure of the casting tray (composite tray) provided in this application;

[0035] Figure 5 This is a schematic diagram illustrating the fabrication of composite brazing filler metal granules provided in this application.

[0036] In the diagram: 101-casting tray; 102-composite tray; 103-casting trough; 104-shrinkage section; 105-brazing filler metal blank; 106-flux layer; 107-brazing filler metal layer; 108-first conveyor belt; 109-second conveyor belt; 110-feeding container; 111-recovery container; 112-flux powder; 113-melting furnace; 114-melted brazing filler metal; 115-gas-protected chamber; 116-pressing machine; 117-boron oxide layer; 118-receiving tank; 119-ejector pin. Detailed Implementation

[0037] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] Example 1

[0041] See Figures 1 to 5 As shown, the composite solder preparation equipment provided in this application includes a blank processing mechanism, a flux feeding mechanism, a pressurizing mechanism, and a conveying mechanism.

[0042] The conveying mechanism includes a mold material tray and a conveying device. The conveying path of the device is sequentially arranged with a casting station, a feeding station, and a pressurizing station. The conveying device is used to sequentially transport the mold material tray to the casting station, the feeding station, and the pressurizing station. The billet processing mechanism is located at the casting station, the flux feeding mechanism is located at the feeding station, and the pressurizing mechanism is located at the pressurizing station.

[0043] In actual operation, the composite brazing filler metal preparation equipment first transports the mold tray to the casting station. At the casting station, the blank processing mechanism uses bottom-sink casting to cast button-shaped brazing filler metal blanks 105 into the mold tray. Then, the conveying device transports the mold tray to the feeding station. At the feeding station, the flux feeding mechanism adds a fixed amount of flux powder 112 to the brazing filler metal blanks 105 in the mold tray. Finally, the conveying device transports the mold tray to the pressurizing station. At the pressurizing station, the pressurizing mechanism applies pressure to the flux powder 112 in the mold tray to press the flux powder 112 and the brazing filler metal blanks 105 together, forming two layers of button-shaped composite brazing filler metal particles. When brazing tools such as coal cutting teeth and tunneling teeth, the flux layer 106 of the composite brazing filler metal particles can be placed downwards in the base groove of the coal cutting tooth for heating and brazing, achieving the purpose of direct welding with a single feeding.

[0044] The composite brazing filler metal preparation equipment provided in this application can realize the automated production of composite brazing filler metal particles with accurate material ratio and high production efficiency; moreover, the prepared composite brazing filler metal particles can also be automatically fed, improving the production efficiency of the industrial chain.

[0045] In this optional embodiment, the mold material tray includes a casting material tray 101 and a composite material tray 102; the conveying device is used to convey the casting material tray 101 to the casting station. The casting material tray 101 is provided with a plurality of casting grooves 103. A contraction portion 104 is provided at the bottom of the casting groove 103 so that the brazing filler blank 105 forms a pointed structure at the position corresponding to the bottom of the groove; the composite material tray 102 is provided with a plurality of receiving grooves 118, which correspond one-to-one with the casting grooves 103. The brazing filler blank 105 formed in the receiving groove 118 can be flipped into the receiving groove 118; the conveying device is used to convey the composite material tray 102 to the feeding station and the pressurizing station.

[0046] In this embodiment, such as Figure 2As shown in the figure, the bottom of the casting tank 103 is conical, so that one end of the cast solder blank 105 forms a conical tip structure. When the flux feeding mechanism feeds the flux, the flux powder 112 is fed to the conical end of the solder blank 105. During the subsequent stamping process, the flux powder 112 needs to combine with the conical end of the solder blank 105 to form composite solder particles. Therefore, the solder blank 105 needs to be flipped when the flux powder 112 is fed. Specifically, the solder blank 105 is cast using the casting pan 101, and then the casting pan 101 is flipped so that the conical end that was located at the bottom during casting is flipped to the top. The solder blank 105 can enter the composite pan 102 during the flipping process to facilitate subsequent feeding and stamping.

[0047] When used, the composite brazing filler metal particles formed in the above preparation process are placed in the groove of the coal cutting tooth base, with the flux layer 106 at the bottom and the brazing filler metal layer 107 at the top. During the heating process, the flux layers 106 of the composite brazing filler metal particles have different temperature gradients according to the melting temperatures of different components. After the lower low-temperature flux layer 106 melts, the brazing filler metal layer 107 at the conical tip structure "piercing" the flux layer 106 can melt faster, flowing and spreading earlier than traditional composite brazing filler metal products. The overall product melting time is shortened, which can effectively reduce the degree of oxidation and improve the welding quality.

[0048] In this embodiment, in an optional configuration, multiple casting troughs 103 are arranged in an array on the casting tray 101; multiple receiving troughs 118 are arranged in an array on the composite tray 102. Specifically, the casting tray 101 can be rectangular, with multiple casting troughs 103 arranged in a rectangular row on the casting tray 101, allowing multiple brazing filler metal blanks 105 of the same specification to be produced in a single casting process. Similarly, the composite tray 102 is also rectangular, with multiple receiving troughs 118 arranged in a rectangular row on the composite tray 102. In this way, after the casting tray 101 is flipped, the brazing filler metal blanks 105 in the multiple casting troughs 103 can fall one by one into the receiving troughs 118 of the composite tray 102, realizing the transfer and flipping of the brazing filler metal blanks 105. This enables multi-trough feeding in the subsequent feeding process and multi-trough stamping in the subsequent stamping process, improving production efficiency and producing multiple composite brazing filler metal particles of the same specification.

[0049] In an optional embodiment, the conveying device includes a first conveyor belt 108 and a second conveyor belt 109. The casting station is located on the conveying path of the first conveyor belt 108, which is used to transport the casting tray 101. The feeding station and the pressurizing station are located on the conveying path of the second conveyor belt 109, which is used to transport the composite tray 102. The conveying height of the first conveyor belt 108 is higher than that of the second conveyor belt 109, and the tail end of the first conveyor belt 108 is opposite to the head end of the second conveyor belt 109, so that the casting tray 101 is flipped at the tail end of the first conveyor belt 108 and latched onto the composite tray 102 located at the head end of the second conveyor belt 109.

[0050] In this embodiment, the first end of the first conveyor belt 108 can be the loading end of the casting tray 101. After the casting tray 101 is loaded onto the first conveyor belt 108, the first conveyor belt 108 can transport the casting tray 101 to the casting station to prepare the brazing filler metal blank 105. Then, the first conveyor belt 108 transports the casting tray 101 loaded with the brazing filler metal blank 105 to the tail end of the first conveyor belt 108. Since the transport height of the first conveyor belt 108 is higher than that of the second conveyor belt 109, when the first conveyor belt 108 transports the casting tray 101 to the tail end, the casting tray 101 falls onto the second conveyor belt 109 below under the action of gravity, and the casting tray 101 flips synchronously during the falling process, so that the brazing filler metal blank 105 flips and is transferred to the composite tray 102.

[0051] In an optional embodiment, the flux feeding mechanism includes a feeding container 110 and a recovery container 111. The feeding container 110 is used to load a large amount of flux powder 112. Specifically, the feeding container 110 is located above the second conveyor belt 109, and a feeding port is provided at the bottom of the feeding container 110 to feed the flux powder 112 into the composite material tray 102. Optionally, the feeding container 110 is equipped with a weight sensor, which can adjust the feeding weight of the flux powder 112 as needed. During the feeding process of the flux powder 112, some of the flux powder 112 will scatter outside the receiving tank 118. To avoid wasting the scattered flux powder 112, a recovery container 111 is provided below the second conveyor belt 109 to collect and collect the scattered flux powder 112, thereby realizing the recycling of the flux powder 112.

[0052] In an optional embodiment, the billet processing mechanism includes a melting furnace 113, which is used to load a large amount of molten brazing filler metal 114. The melting furnace 113 is located above the first conveyor belt 108, and a discharge port is provided at the bottom of the melting furnace 113. The molten brazing filler metal 114 can form a molten flow that enters the casting tray 101 through the discharge port. The molten flow entering the casting tray 101 can be cooled in the casting tank 103 to form a brazing filler metal billet 105. Optionally, the melting furnace 113 is equipped with a weight sensor, which can adjust the feeding weight of the molten brazing filler metal 114 as needed.

[0053] Furthermore, the billet processing mechanism includes a gas protection chamber 115; the gas protection chamber 115 is installed at the discharge port to release protective gas during the casting process, so as to prevent the molten flow from being oxidized by air during the casting process and affecting the quality of subsequent composite brazing filler metal particles.

[0054] In an optional embodiment, the pressurizing mechanism includes a press 116 and an injection pipe. The press hammer of the press 116 applies pressure to the flux powder 112, so that the flux powder 112 and the filler blank 105 in the mold tray are pressed to form a composite filler metal. The injection pipe is connected to the press hammer of the press 116 to inject adhesive into the mold tray.

[0055] In this embodiment, the adhesive is specifically sodium silicate (commonly known as water glass) or other solvents such as hexanediol cellulose solution or glycerol cellulose solution. Adding sodium silicate during the stamping of the flux powder 112 and the solder blank 105 can, on the one hand, increase the density of the flux layer 106, and on the other hand, provide a binding effect, making the flux powder 112 less likely to disperse.

[0056] In addition, since the composite brazing filler metal formed under pressure is not easy to demold, an ejector pin 119 is provided at the end of the second conveyor belt 109 to push the finished composite brazing filler metal out of the mold tray.

[0057] Example 2

[0058] The composite solder preparation equipment in this second embodiment is an improvement on the above embodiments. The technical content disclosed in the above embodiments will not be described again, and the content disclosed in the above embodiments also belongs to the content disclosed in this second embodiment.

[0059] In an optional embodiment, the composite solder preparation equipment further includes a pre-feeding mechanism, which is used to add a protective agent into an empty mold tray.

[0060] In this embodiment, the protective agent is specifically boron oxide or boric acid, etc. After the molten solder enters the mold through the bottom drain, the boron oxide or boric acid is melted. Because the density of the molten boron oxide or boric acid (H3BO3 generates boron oxide upon heating) is low, it floats upwards, while the molten solder sinks. Before casting to form the solder blank 105, the pre-feeding mechanism first adds boron oxide to the mold tray. When casting the solder blank 105, the molten solder 114 entering the mold tray has a higher density than boron oxide, thus sinking to the bottom of the casting tank 103, thereby forming a solder blank 105 with a pointed end and a flat glass shell protective layer at the other end. Then, the solder blank 105 is fed and pressurized to finally form a composite solder particle with a three-layer structure of flux layer 106, solder layer 107, and boron oxide layer 117. This composite solder particle contains no toxic chemical solvents, adhesives, etc., which can effectively reduce pollutant emissions and reduce harm to operators and the environment.

[0061] When using composite brazing filler metal particles, they are placed in the groove of the coal cutting tooth base, with the flux layer 106 at the bottom and the brazing filler metal layer 107 on top. During heating, the upper glassy boron oxide layer 117 has a high viscosity and can better protect the inner surface. After the lower low-temperature flux layer 106 melts, the brazing filler metal layer 107, which "pierces" the conical tip structure of the flux layer 106, can melt faster, flowing and spreading earlier than traditional composite brazing filler metal products. The overall product melting time is shortened, which can effectively reduce the degree of oxidation and improve the welding quality.

[0062] Example 3

[0063] Embodiment 3 of this application provides a composite solder particle, which is prepared by the composite solder preparation equipment of any of the above embodiments. The composite solder particle includes a flux layer 106, a solder layer 107 and a protective agent layer; the solder layer 107 is located between the flux layer 106 and the protective agent layer, and the side of the solder layer 107 facing the flux layer 106 forms a conical tip structure.

[0064] In this embodiment, the composite brazing filler metal particles are placed directly into the coal cutting tooth base groove for single-pass feeding. The flux layer 106 is positioned below and the brazing filler metal layer 107 is positioned above. During heating, after the lower low-temperature flux layer 106 melts, the brazing filler metal layer 107, which "pierces" the conical tip structure of the flux layer 106, melts faster than traditional brazing filler metals due to its smaller heated surface area. It also flows and spreads earlier than traditional composite brazing filler metal products, shortening the overall melting time and effectively reducing oxidation and improving welding quality (see the table below for details). Furthermore, the composite brazing filler metal particles contain no toxic chemical solvents or adhesives, effectively reducing pollutant emissions and minimizing harm to operators and the environment.

[0065] Brazing filler metal type size weight Melting time Traditional granular brazing filler metal φ12mm 2.394g 12s New composite brazing filler metal φ12mm 2.389g 9s

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In addition, those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are meant to be within the scope of this application and form different embodiments.

Claims

1. A composite solder preparation apparatus, characterized in that, It includes a billet processing mechanism, a flux feeding mechanism, a pressurizing mechanism, and a conveying mechanism; The conveying mechanism includes a mold material tray and a conveying device. The conveying device has a casting station, a feeding station and a pressurizing station arranged sequentially on its conveying path. The conveying device is used to convey the mold material tray sequentially to the casting station, the feeding station and the pressurizing station. The blank processing mechanism is located at the casting station to cast the brazing filler metal into the mold tray to form a brazing filler metal blank; the flux feeding mechanism is located at the feeding station to feed flux powder onto the brazing filler metal blank in the mold tray; the pressurizing mechanism is located at the pressurizing station to press the flux powder and the brazing filler metal blank in the mold tray to form a composite brazing filler metal.

2. The composite solder preparation equipment according to claim 1, characterized in that, The mold material tray includes a casting material tray and a composite material tray; The conveying device is used to convey the casting tray to the casting station. The casting tray is provided with multiple casting grooves. The bottom of the casting groove is provided with a contraction section so that the brazing filler blank forms a pointed structure at the position corresponding to the bottom of the groove. The composite material tray is provided with multiple receiving slots, each corresponding to a casting tank. The brazing filler blank formed in the receiving slot can be flipped into the receiving slot. The conveying device is used to convey the composite material tray to the feeding station and the pressurizing station.

3. The composite solder preparation equipment according to claim 2, characterized in that, Multiple casting troughs are arranged in an array on the casting tray; multiple receiving troughs are arranged in an array on the composite tray.

4. The composite solder preparation equipment according to claim 2, characterized in that, The conveying device includes a first conveyor belt and a second conveyor belt; The casting station is located on the conveying path of the first conveyor belt, which is used to transport the casting material tray; the feeding station and the pressurizing station are located on the conveying path of the second conveyor belt, which is used to transport the composite material tray. The first conveyor belt has a higher transport height than the second conveyor belt, and the tail end of the first conveyor belt is opposite to the head end of the second conveyor belt, so that the casting tray flips at the tail end of the first conveyor belt and is fastened to the composite tray located at the head end of the second conveyor belt.

5. The composite solder preparation equipment according to claim 4, characterized in that, The flux feeding mechanism includes a feeding container and a recovery container; The feeding container is used to load flux powder; the feeding container is located above the second conveyor belt, and the bottom of the feeding container is provided with a feeding port to feed the flux powder into the composite material tray; The recycling container is located below the second conveyor belt to collect the scattered flux powder.

6. The composite brazing filler metal preparation equipment according to claim 4, characterized in that, The billet processing mechanism includes a smelting furnace; The smelting furnace is used to load molten brazing filler metal; the smelting furnace is located above the first conveyor belt, and the bottom of the smelting furnace is provided with a discharge port to deliver the molten brazing filler metal to the casting tray.

7. The composite brazing filler metal preparation equipment according to claim 6, characterized in that, The billet processing mechanism includes a gas protection chamber; The protective gas chamber is installed at the discharge port to release protective gas during the casting process.

8. The composite solder preparation equipment according to claim 1, characterized in that, The pressurizing mechanism includes a stamping machine and an injection pipe; The press is used to press the flux powder and the filler blank in the mold tray to form a composite filler metal; the injection pipe is connected to the press hammer to inject adhesive into the mold tray.

9. The composite solder preparation equipment according to claim 1, characterized in that, It also includes a pre-feeding mechanism for dispensing a protective agent into an empty mold tray.

10. A composite brazing filler metal particle, characterized in that, It includes a flux layer, a solder layer, and a protective layer; The solder layer is located between the flux layer and the protective agent layer, and the solder layer forms a tapered tip structure facing one side of the flux layer.

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