CN112276289A

CN112276289A - Brazing structure

Info

Publication number: CN112276289A
Application number: CN202011133663.2A
Authority: CN
Inventors: 林祥龙; 胡为纬; 黄静夷; 王建; 张艳吉; 李玉娟
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-01-29

Abstract

The present invention provides a brazing structure comprising: a guide rod having a first channel; the guide nozzle is at least partially made of ceramic materials and provided with a second channel; wherein the guide rod is connected with the guide nozzle so that the welding wire sequentially passes through the first channel and the second channel. The brazing structure solves the problem that the welding flux is easy to adhere to the welding wire nozzle during brazing operation in the prior art.

Description

Brazing structure

Technical Field

The invention relates to the field of welding, in particular to a brazing structure.

Background

At present, in the copper pipe fitting brazing equipment in the refrigeration industry, the technology of automatically adding welding wires is widely applied, in the process of adding welding flux, the welding wires are added to a welding position according to a preset position through a welding wire guide nozzle, and the welding wires are diffused into a welding seam through capillary action after being melted by base metal.

Because the welding wire guide nozzle is generally processed by adopting metal materials, in the process of adding the welding flux, the welding wire guide nozzle is also heated together with the workpiece, and the head of the welding wire is heated and melted, so that the welding wire is easily adhered to the welding wire guide nozzle made of the metal materials.

Disclosure of Invention

The invention mainly aims to provide a brazing structure to solve the problem that a solder and a welding wire guide nozzle are easy to adhere during brazing operation in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a brazing structure including: a guide rod having a first channel; the guide nozzle is at least partially made of ceramic materials and provided with a second channel; wherein the guide rod is connected with the guide nozzle so that the welding wire sequentially passes through the first channel and the second channel.

Further, at least a portion of the tip is made of an oxide ceramic material.

Further, the ceramic material contains: alumina, or titania, or zirconia.

Further, the guide nozzle comprises a main body part and a nozzle body part, the main body part is detachably connected with the nozzle body part, the main body part is connected with the guide rod, and the nozzle body part is used for extending out a welding wire; wherein the mouth body part is made of ceramic material.

Further, the guide nozzle is of an integrally formed structure.

Further, one end of the guide rod, which is used for being connected with the guide nozzle, is provided with a connecting plug, one end of the guide nozzle, which is used for being connected with the guide rod, is provided with a connecting groove, and at least part of the connecting plug is inserted into the connecting groove so as to connect the guide rod and the guide nozzle.

Furthermore, the outer side of the connecting plug is provided with external threads, the inner wall of the connecting groove is provided with internal threads matched with the external threads, and the connecting plug and the connecting groove are in threaded connection through the external threads and the internal threads.

Furthermore, one end of the connecting plug, which is far away from the guide nozzle, is provided with a limiting step, and the limiting step protrudes out of the peripheral surface of the connecting plug; and a locking nut matched with the external thread is installed on the outer side of the connecting plug, and the locking nut is installed between the limiting step and the end part of the guide nozzle.

Furthermore, one end of the connecting groove, which is far away from the guide rod, is provided with a transition hole, and the connecting groove is communicated with the second channel through the transition hole; the inner wall surface of the transition hole is a conical surface and is gradually reduced along the sliding-out direction of the welding wire.

Further, an arc chamfer is arranged at the joint of the transition hole and the second channel.

The technical scheme of the invention comprises the following steps: a guide rod having a first channel; the guide nozzle is at least partially made of ceramic materials and provided with a second channel; wherein, the guide arm is connected with the guide nozzle to make the welding wire pass through first passageway and second passageway in proper order, solved among the prior art when carrying out the brazing operation the easy adhesion problem of solder and welding wire guide nozzle.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a schematic structural view of an embodiment of a brazed structure according to the present invention;

FIG. 2 shows a cross-sectional view A-A of the brazed structure of the invention of FIG. 1;

FIG. 3 shows a schematic view of an embodiment of a delivery nozzle of the brazing structure of the present invention;

FIG. 4 shows a cross-sectional view B-B of the brazed structure of the present invention in FIG. 3;

FIG. 5 shows a structural schematic view of the brazing structure of the invention of FIG. 1 in another orientation; and

fig. 6 shows a partially enlarged view of a portion I of the brazing structure of the invention in fig. 1.

Wherein the figures include the following reference numerals:

1. a guide bar; 11. a guide surface; 12. a first channel; 13. a connecting plug; 14. a limiting step; 16. a first plane; 2. a guide nozzle; 21. a second channel; 23. a connecting groove; 24. a transition hole; 25. chamfering with an arc; 26. a second plane; 3. locking the nut; 4. and (4) welding wires.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 6, the brazing structure of the present embodiment includes: a guide rod 1, the guide rod 1 having a first channel 12; a nozzle 2, at least part of the nozzle 2 being made of a ceramic material, the nozzle 2 having a second channel 21; wherein the guide rod 1 and the guide mouth 2 are connected such that the welding wire 4 passes through the first passage 12 and the second passage 21 in sequence. The guide nozzle 2 made of ceramic materials is not easy to be heated by induction in the brazing operation, so that the welding wire is sent out to the brazing position through the guide nozzle 2 made of ceramic materials, and the problem that the brazing structure is heated and the welding wire is mutually permeated to be adhered to the welding wire is avoided.

Specifically, in the present embodiment, the brazing structure is composed of the guide bar 1 and the guide nozzle 2, the brazing structure is a workpiece that feeds a welding wire to a welding position, the welding wire 4 passes through the brazing structure to reach the welding position, and then is melted by heat and penetrates into the welding workpiece to complete a brazing operation. Specifically, guide rod 1 has a first passage 12 inside, guide tip 2 has a second passage 21 inside, and welding wire 4 passes through first passage 12 and second passage 21 in order to reach the welding position. During the brazing operation, the induction heat source heats the welding wire 4 and the weldment, so that the welding wire is melted into liquid brazing filler metal after the welding wire and the weldment reach the melting temperature of the welding wire 4, and the liquid brazing filler metal fills gaps of the weldment to complete the brazing operation. The existing brazing structure is usually made of metal, and during induction heating, the metal brazing structure is very easy to be heated so as to react with a welding wire and adhere with the welding wire, so that brazing operation is influenced. In the process of induction heating, the closer the brazing structure is to the position where the welding wire works (i.e. the position where the welding wire is fed out from the brazing structure), the higher the degree of heating, in this embodiment, the brazing structure comprises a guide rod 1 and a guide nozzle 2, and the guide nozzle 2 is the closest part to the induction heating area and is more easily heated to be adhered to the welding wire.

In this embodiment, at least a portion of the nozzle 2 is made of a ceramic material, which is an inorganic non-metallic material formed from a natural or synthetic compound by molding and sintering at a high temperature. It has the advantages of high melting point, high hardness, high wear resistance, oxidation resistance, etc. Compared with metal materials, the ceramic material is not easy to be heated when contacting the induction heating area, and is not easy to react with brazing filler metal, the part of the guide nozzle 2 close to the induction heating area is made of the ceramic material, and the problem that the guide nozzle 2 is adhered to the welding wire 4 in the brazing process can be solved by utilizing the special performance of the ceramic material.

In the brazing structure of the present embodiment, at least a part of the delivery nozzle 2 is made of an oxide ceramic material.

The oxide ceramic material has the characteristics of excellent strength, hardness, insulativity, heat conduction, high temperature resistance, oxidation resistance, corrosion resistance, wear resistance, high temperature strength and the like, has good high-temperature stability and mechanical property under severe environmental conditions, is widely applied to industrial production, has low cost, is prepared by adopting the oxide ceramic material at the part of the guide nozzle 2 close to the induction heating area, and can avoid the problem of adhesion between the guide nozzle 2 and a welding wire 4 in the brazing process by utilizing the specific property of the oxide ceramic material.

In this embodiment, the ceramic material in the brazing structure contains: alumina, or titania, or zirconia.

Alumina is an inorganic substance, of the formula Al2O 3. Is a high-hardness compound, has a melting point of 2054 ℃ and a boiling point of 2980 ℃, can be used for preparing an ionizable ion crystal at a high temperature, and is commonly used for manufacturing refractory materials.

Titanium oxide is an inorganic substance which has a high melting point and is also used for the manufacture of refractory glass, glazes, enamels, china clay, high temperature resistant laboratory ware and the like.

Zirconia is chemically inert, has the properties of high melting point, high resistivity, high refractive index and low thermal expansion coefficient, and is an important high-temperature resistant material and ceramic insulating material.

In the brazing structure of the embodiment, at least part of the guide nozzle 2 is made of alumina, titania or zirconia, which can prevent the guide nozzle from adhering to the welding wire during brazing, and can reduce production cost and facilitate machining and forming.

In the present embodiment, the ceramic material containing alumina, titania, or zirconia includes, for example: alumina ceramics, zirconia ceramics, zirconium titanate ceramics, aluminum titanate ceramics, and the like. Wherein, the alumina ceramic has good mechanical property and heat insulation property, and is widely applied in industry; the zirconia ceramics have excellent heat resistance; the main raw materials of the zirconium titanate ceramic are titanium dioxide and zirconium dioxide; aluminum titanate ceramics are made of titanium oxide and aluminum oxide.

In the brazing structure of the embodiment, the guide nozzle 2 comprises a main body part and a nozzle body part, the main body part is detachably connected with the nozzle body part, the main body part is connected with the guide rod, and the nozzle body part is used for extending out a welding wire; wherein the mouth body part is made of ceramic material.

The guide nozzle 2 of the present embodiment is provided with a main body portion and a nozzle body portion, the main body portion is detachably connected with the nozzle body portion, the main body portion is connected with the guide rod, and the nozzle body portion is used for extending a welding wire. Therefore, the easily heated part of the guide nozzle 2 can be independently set to be a structure made of ceramic materials, and other connecting parts can be made of other materials with better strength, so that the brazing structure can meet the operation requirement.

In the brazing structure of the present embodiment, as shown in fig. 4 and 5, the nozzle 2 is formed integrally. The guide nozzle 2 is arranged to be of an integrally formed structure, so that the machining procedures of the guide nozzle 2 can be reduced, and the cost is saved.

As shown in fig. 2, in the brazing structure of the present embodiment, one end of the guide bar 1 for connection with the guide beak 2 has a connection plug 13, one end of the guide beak 2 for connection with the guide bar 1 has a connection groove 23, and at least a portion of the connection plug 13 is inserted in the connection groove 23 to connect the guide bar 1 and the guide beak 2.

In this embodiment, guide arm 1 is used for having connecting plug 13 with the one end that leads mouth 2 and is connected, lead mouth 2 and be used for having connecting groove 23 with the one end that guide arm 1 is connected, at least part of connecting plug 13 is inserted and is established in connecting groove 23, thereby realize guide arm 1 and the connection of leading mouth 2, when using, the heat in the induction heating district that ceramic material made leads mouth 2 can completely cut off the induction heating district that receives, when making self not take place the adhesion with the welding wire, the heat that also can completely cut off the heating district transmits guide arm 1 department through leading mouth 2, make operating personnel more convenient and safety when carrying out the operation of brazing.

In the brazing structure of the present embodiment, as shown in fig. 2, an external thread is disposed on an outer side of the connection plug 13, an internal thread matched with the external thread is disposed on an inner wall of the connection groove 23, and the connection plug 13 and the connection groove 23 are screwed together through the external thread and the internal thread.

The guide rod 1 and the guide nozzle 2 are connected through threads, specifically, external threads are arranged on the outer side of the connecting plug 13, internal threads matched with the external threads are arranged on the inner wall of the connecting groove 23, and the connecting plug 13 and the connecting groove 23 are connected through the external threads and the internal threads in a threaded mode. The arrangement is simple and easy to realize, the guide nozzle 2 is convenient to replace when damaged, and the service life of the brazing structure is prolonged.

In the brazing structure of the present embodiment, as shown in fig. 1 and fig. 2, one end of the connection plug 13 away from the nozzle 2 is provided with a limiting step 14, and the limiting step 14 protrudes out of the outer peripheral surface of the connection plug 13; the outside of connecting plug 13 is installed with lock nut 3 with external screw thread matched with, and lock nut 3 is installed between spacing step 14 and the tip of spigot 2.

In the brazing structure of this embodiment, since the nozzle 2 is made of a ceramic material, the strength of the ceramic material is not as high as that of a metal material, in order to firmly connect the nozzle 2 and the guide rod 1, a limit step 14 is provided at one end of the connection plug 13 away from the nozzle 2, the limit step 14 protrudes out of the outer peripheral surface of the connection plug 13, as shown in fig. 1 and 2, a lock nut 3 matched with the external thread is installed at the outer side of the connection plug 13, and the lock nut 3 is installed between the limit step 14 and the end of the nozzle 2. Therefore, after the guide nozzle 2 is connected with the guide rod 1 through the threads, the locking nut 3 is screwed down reversely, so that the threaded connection between the guide nozzle 2 and the guide rod 1 is tighter, and looseness is not easily generated.

In the brazing structure of the embodiment, as shown in fig. 2 and 4, a transition hole 24 is formed at one end of the connecting groove 23 away from the guide rod 1, and the connecting groove 23 is communicated with the second channel 21 through the transition hole 24; the inner wall surface of the transition hole 24 is a tapered surface and gradually decreases in the direction in which the welding wire 4 slides out.

In order to enable the welding wire to more smoothly pass through the second channel 21 to reach the welding position, one end of the connecting groove 23, which is far away from the guide rod 1, is provided with a transition hole 24, and the connecting groove 23 is communicated with the second channel 21 through the transition hole 24; the inner wall surface of the transition hole 24 is a tapered surface and gradually decreases in the direction in which the welding wire 4 slides out. The transition hole 24 may guide the welding wire 4 more smoothly into the second passage 21 as the welding wire 4 passes out of the first passage 12, thereby allowing the welding wire 4 to move more smoothly in the brazing configuration.

In the welded structure of the present embodiment, as shown in fig. 4, a rounded chamfer 25 is provided at the junction of the transition hole 24 and the second passage 21.

As shown in fig. 4, in the brazing structure of the present embodiment, a rounded chamfer 25 is provided at the junction of the transition hole 24 and the second passage 21. So set up, make the removal of welding wire 4 in welded structure more be difficult to appear the jamming, make the transport of welding wire smooth and easy more.

Preferably, in the brazing structure of the present embodiment, the first channel 12 and the second channel 21 are circular channels, and the axes of the first channel 12 and the second channel 21 are on the same straight line, so that the feeding of the welding wire can be smoother.

Alternatively, in the present embodiment, as shown in fig. 3 and 5, the guide rod 1 and the guide nozzle 2 are provided as a cylindrical structure, the outer side of the guide rod 1 has at least two first planes 16, and the first planes 16 are arranged at intervals along the outer circumferential surface of the guide rod 1, so that the guide rod 1 and the guide nozzle 2 are screwed together through the first planes 16; at least two second planes 26 are opened at the outer side of the nozzle 2, and the second planes 26 are arranged at intervals along the outer circumferential surface of the nozzle 2 so as to screw the nozzle 2 and the guide rod 1 through the second planes 26. The guide surface 11 is arranged at the inlet of the welding wire 4 entering the guide rod 1, so that the welding wire can enter the brazing structure more smoothly.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

by providing a guide rod 1 and a guide tip 2, the guide rod 1 having a first channel 12, at least part of the guide tip 2 being made of a ceramic material, the guide tip 2 having a second channel 21; wherein the guide rod 1 and the guide mouth 2 are connected such that the welding wire 4 passes through the first passage 12 and the second passage 21 in sequence. The guide nozzle 2 made of ceramic materials (zirconia, alumina, titanium oxide and other materials can resist the high temperature of more than 1000 ℃, is not easy to be heated by induction in the brazing operation, so that the welding wire is sent to the brazing position through the guide nozzle 2, and the welding wire and the ceramic materials can not mutually permeate and adhere together due to the high temperature.

The inner structure of the wire guide nozzle adopts a conical design, so that the wire is prevented from being clamped, the wire feeding process is smooth, and the influence on the welding quality caused by insufficient wire filling amount in the welding process is avoided.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A brazed structure, comprising:

a guide bar (1), the guide bar (1) having a first channel (12);

a nozzle (2), at least part of said nozzle (2) being made of a ceramic material, said nozzle (2) having a second channel (21);

wherein the guide rod (1) is connected with the guide nozzle (2) so that the welding wire (4) sequentially passes through the first channel (12) and the second channel (21).

2. Brazing structure according to claim 1, wherein at least part of said snout (2) is made of an oxide ceramic material.

3. The brazing structure according to claim 1, wherein the ceramic material contains: alumina, or titania, or zirconia.

4. The brazing structure according to claim 1, wherein the nozzle (2) comprises a main body portion and a nozzle body portion, the main body portion is detachably connected with the nozzle body portion, the main body portion is connected with the guide rod, and the nozzle body portion is used for extending the welding wire; wherein the nozzle body is made of the ceramic material.

5. The brazing structure according to claim 1, wherein the snout (2) is of one-piece construction.

6. The brazing structure according to claim 1, wherein an end of the guide bar (1) for connecting with the guide tip (2) has a connection plug (13), an end of the guide tip (2) for connecting with the guide bar (1) has a connection groove (23), and at least a portion of the connection plug (13) is inserted in the connection groove (23) to connect the guide bar (1) and the guide tip (2).

7. The brazing structure according to claim 6, wherein an outer side of the connection plug (13) is provided with an external thread, an inner wall of the connection groove (23) is provided with an internal thread which is matched with the external thread, and the connection plug (13) and the connection groove (23) are screwed through the external thread and the internal thread.

8. The brazing structure according to claim 7, wherein the end of the connecting plug (13) far away from the nozzle (2) is provided with a limiting step (14), and the limiting step (14) protrudes out of the outer peripheral surface of the connecting plug (13); and a locking nut (3) matched with the external thread is installed on the outer side of the connecting plug (13), and the locking nut (3) is installed between the limiting step (14) and the end part of the guide nozzle (2).

9. The brazing structure according to claim 6, wherein: one end, far away from the guide rod (1), of the connecting groove (23) is provided with a transition hole (24), and the connecting groove (23) is communicated with the second channel (21) through the transition hole (24); the inner wall surface of the transition hole (24) is a conical surface and is gradually reduced along the sliding-out direction of the welding wire (4).

10. Brazing structure according to claim 9, wherein the junction of the transition hole (24) and the second channel (21) is provided with a rounded chamfer (25).