CN115121896A - Brazing device and method - Google Patents
Brazing device and method Download PDFInfo
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- CN115121896A CN115121896A CN202110311811.3A CN202110311811A CN115121896A CN 115121896 A CN115121896 A CN 115121896A CN 202110311811 A CN202110311811 A CN 202110311811A CN 115121896 A CN115121896 A CN 115121896A
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- electrode
- brazing
- conductive
- copper bar
- bush
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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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
Abstract
The embodiment of the invention relates to the technical field of brazing, and discloses a brazing device and a brazing method, wherein the brazing device can be used for directly carrying out high-temperature brazing on a part needing brazing without heating an integral product, the integral process time is reduced from 60 minutes to about 25 seconds, the brazing time is greatly saved, and the production efficiency is improved. Whole in-process can not put into high temperature equipment with copper bar and bush whole and heat, consequently, can not lead to the whole size of copper bar to change for its whole size satisfies automatic assembly demand. And because the whole process pushes the second electrode to apply pressure to the first electrode by the movable cylinder of the welding machine body, the pressure is stable and consistent, so that the contact resistance between the bushing and the copper bar can be stably controlled, for example, the contact resistance between the bushing and the copper bar can be stably maintained below 1 microohm.
Description
Technical Field
The embodiment of the invention relates to the technical field of brazing, in particular to a brazing device and method.
Background
In the new energy automobile electronic parts field, especially have super high electric current (the highest 3000A) circuit in battery management system BMU and battery package short circuit system BDU, need use very thick copper bar as high conducting medium, reduce the problem that generates heat that resistance arouses.
In order to realize the high-temperature welding of the copper bar and the bush in the related technology, the copper bar and the bush are required to be fixed and then put into an ammonia decomposition tunnel furnace or a vacuum heating furnace for welding, because the melting of brazing filler metal requires ultrahigh environmental temperature to heat the whole product to more than 650 ℃, and the temperature is kept for more than 30 minutes, and extra pressure is required to be applied to enable the bush and the copper bar to be better brazed together. And because the copper bar produces annealing softening under high temperature environment for a long time, both oxidation blackened influence outward appearance after annealing easily, also can't guarantee the product size and lead to the product that obtains to be difficult to satisfy the requirement of automatic assembly. In the heating process, the pressure changes due to the melting of the solder and the annealing and softening of the copper bars, so that the bushing and the copper bars cannot be in complete contact, and the contact resistance cannot be stably controlled.
Disclosure of Invention
An object of the embodiments of the present invention is to provide a soldering apparatus and method, which can overcome the disadvantages of the related art.
In order to solve the above technical problem, an embodiment of the present invention provides a brazing apparatus including: the welding machine body is used for welding the conductive bushing and the copper bar together; the welder body includes: the first electrode and the second electrode are oppositely arranged, the first electrode is used for bearing the conductive lining, the brazing filler metal and the copper bar which are to be welded and are arranged in a stacked mode, and the materials of the first electrode and the second electrode both comprise tungsten; the welder body still includes: the movable air cylinder is connected with the second electrode, and the power supply is respectively connected with the first electrode and the second electrode; the movable cylinder is used for driving the second electrode to press the copper bars on the conductive lining; the power supply is used for supplying power to the first electrode and the second electrode, so that the first electrode and the second electrode are in short circuit when the second electrode presses the copper bar on the conductive bushing.
In addition, a groove is formed in the first electrode and used for fixing the conductive lining. The concave groove is used for fixing the conductive bush in the scheme, so that the condition that the movable air cylinder pushes the second electrode to apply pressure to the first electrode and the conductive bush is displaced is avoided, and the accuracy of the welding position of the conductive bush and the copper bar is ensured.
In addition, the first electrode includes: the bearing part is used for bearing the conductive bushing, and the at least two movable clamping parts are arranged on the bearing part; at least two movable clamping parts are located bearing part top, and in first position department with the bearing part encloses and establishes the formation the recess, at least two movable clamping parts are in first position department will the electrically conductive bush is fixed in the recess. At least two movable clamping parts can form different-size grooves in the scheme, so that the conductive bushings with different sizes can be clamped and fixed.
In addition, the brazing apparatus further includes: a working water tank; the first electrode is arranged in the working water tank. According to the scheme, the welding process can be completed in water, so that annealing and softening of materials caused by overheating of the copper bar can be avoided; and because high temperature is generated in the welding process, the water is gasified to generate a local vacuum environment, so that a protective layer with extremely low oxygen content parameters is formed on the surface of the copper bar, and the conductive lining and the copper bar are prevented from being oxidized and blackened.
In addition, a lifting platform is arranged below the first electrode and used for driving the first electrode to extend out of or into the working water tank. In this scheme. The elevating platform can drive first electrode and stretch into or stretch out the surface of water automatically, need not the staff and fixes electrically conductive bush on first electrode in aqueous, has reduced the work degree of difficulty.
In addition, the brazing apparatus further includes: the connecting wire is connected with the first electrode and the power supply, and the power supply is arranged outside the working water tank; the working water tank is provided with a through hole, and the connecting wire penetrates through the through hole to supply power to the first electrode.
The embodiment of the invention also provides a brazing method, which is applied to the brazing device; the brazing method comprises the following steps: securing a conductive bushing to the first electrode; placing brazing filler metal at the welding position of the conductive bushing, placing the copper bar above the conductive bushing with the brazing filler metal placed, and aligning the copper bar with the conductive bushing; and pressing the copper bar on the conductive bush, and electrifying the first electrode and the second electrode to enable the first electrode and the second electrode to be in short circuit.
Additionally, the securing the conductive liner to the first electrode includes: and placing the conductive lining on the bearing part, and controlling at least two movable clamping parts to move to a first position for polymerization so as to fix the conductive lining in the groove.
In addition, the pressing the copper bar on the conductive bush and electrifying the first electrode and the second electrode to short-circuit the first electrode and the second electrode includes: extending the second electrode into the working water tank to press the copper bars on the conductive lining; energizing the first electrode and the second electrode to short the first electrode and the second electrode.
Before the conductive bush is fixed to the first electrode, the method further comprises the steps of; moving the first electrode out of the working water tank; after the fixing the conductive bush to the first electrode and before the pressing the copper bar on the conductive bush, further comprising: and extending the first electrode fixed with the conductive lining into the working water tank.
Compared with the related art, the embodiment of the invention provides a brazing device, which can directly perform high-temperature brazing on a part needing brazing, does not need to heat an integral product, reduces the integral process time from 60 minutes to about 25 seconds, greatly saves the brazing time and improves the production efficiency. Whole in-process can not put into high temperature equipment with copper bar and bush whole and heat, consequently, can not lead to the whole size of copper bar to change to satisfy the automatic assembly demand. And because the whole process pushes the second electrode to apply pressure to the first electrode by the movable cylinder of the welding machine body, the pressure is stable and consistent, so that the contact resistance between the bushing and the copper bar can be stably controlled, for example, the contact resistance between the bushing and the copper bar can be stably maintained below 1 microohm.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
FIG. 1 is a schematic structural view of a brazing apparatus according to a first embodiment of the present invention;
FIG. 2 is a schematic structural view of a brazing apparatus according to a second embodiment of the present invention;
FIG. 3 is a schematic structural view of a brazing apparatus according to a third embodiment of the present invention;
FIG. 4 is a schematic flow chart of a brazing method according to a fourth embodiment of the present invention;
FIG. 5 is a schematic flow chart of a brazing method according to a fifth embodiment of the present invention;
fig. 6 is a schematic flow chart of a brazing method according to a sixth embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
In order to realize the high-temperature welding of the copper bar and the bush in the related technology, the bush and the copper bar are fixedly placed into a chain type ammonia decomposition tunnel furnace device or a high-temperature vacuum furnace together with certain pressure, about 60 minutes is expected to be needed to fully melt brazing filler metal positioned between the bush and the copper bar and bond the copper bar and the conductive bush, because the brazing filler metal is melted, the whole product is heated to more than 650 ℃ by ultrahigh environmental temperature and is kept for more than 30 minutes, and extra pressure is needed to be applied to enable the bush and the copper bar to be better brazed together. And because the copper bar produces annealing softening under high temperature environment for a long time, both oxidation blackened influence outward appearance after annealing easily, also can't guarantee the product size and lead to the product that obtains to be difficult to satisfy the requirement of automatic assembly. And in the heating process, the pressure is changed due to the melting of the solder and the annealing and softening of the copper bar, so that the lining and the copper bar cannot be in complete contact, and the contact resistance cannot be stably controlled.
In view of this, the first embodiment of the present invention provides a soldering apparatus, as shown in fig. 1, including a welder body for soldering the conductive bush 2 and the copper bar 4 together.
The welding machine body includes: the welding device comprises a first electrode 11 and a second electrode 12 which are oppositely arranged, wherein the first electrode 11 is used for bearing a conductive lining 2, a brazing filler metal 3 and a copper bar 4 which are to be welded and are arranged in a stacked mode, and the materials of the first electrode 11 and the second electrode 12 both comprise tungsten. The welding machine body still includes: a movable cylinder 5 connected to the second electrode 12, and a power source connected to the first electrode 11 and the second electrode 12, respectively.
The movable cylinder 5 is used for driving the second electrode 12 to press the copper bar 4 on the conductive lining 2, and the power supply is used for supplying power to the first electrode 11 and the second electrode 12, so that the first electrode 11 and the second electrode 12 are short-circuited when the second electrode 12 presses the copper bar 4 on the conductive lining 2. The first electrode 11 and the second electrode 12 which are made of tungsten are electrified and short-circuited to generate instantaneous high temperature of 800-1000 ℃ during welding, and then the high temperature is transmitted to the brazing filler metal 3 through the copper bar 4 and the conductive lining 2; since the copper bar 4 and the conductive bush 2 themselves generate high heat when the first electrode 11 and the second electrode 12 are short-circuited, the brazing filler metal 3 is heated to the melting point at an accelerated speed. Reuse the activity cylinder 5 of welding machine body and promote second electrode 12 and make 3 even extrusions and overflows of brazing filler metal to 11 applied pressure of first electrode, so make between brazing filler metal 3, conductive bush 2 and the copper bar 4 evenly adhere to the laminating, be the combination between the molecule between the three, guaranteed electric conductive property and cohesion, for example: the torque of the brazing device in the embodiment can reach 45N/m after the conductive bushing 2 and the copper bar 4 are welded.
The brazing device in the embodiment can directly perform high-temperature brazing on the part needing brazing, the whole product does not need to be heated, the whole process time is reduced from 60 minutes to about 25 seconds, the brazing time is greatly saved, and the production efficiency is improved. Whole in-process can not put into high temperature equipment copper bar 4 and bush whole heating, consequently, can not lead to the whole size of copper bar 4 to change to satisfy the automatic assembly demand. And because the whole process is pushed by the movable cylinder 5 of the welding machine body to apply pressure to the first electrode 11 by the second electrode 12, the pressure is stable and consistent, so that the contact resistance between the bush and the copper bar 4 can be stably controlled, for example: the brazing device in the embodiment can stably control the contact resistance of the bushing and the copper bar 4 to be below 1 micro ohm after welding and combination.
Specifically, the working temperature during welding is also related to the magnitude of the short-circuit current, and the larger the short-circuit current is, the higher the working temperature is. Therefore, in actual operation, the magnitude of the short-circuit current can be set according to actual needs to meet different operating temperature requirements, and the embodiment is not particularly limited.
Optionally, the chain type ammonia decomposition tunnel furnace equipment or high-temperature vacuum furnace equipment adopted in the related technology has large floor area, expensive equipment, long working procedure and high cost. In the embodiment, the medium-frequency inverter resistance welding machine can be used as the welding machine body, and compared with the welding machine, the welding machine has the advantages of small occupied area of equipment, cheap equipment, short process and low cost.
It should be noted that the conductive bush 2 and the copper bar 4 shown in the present embodiment are only for illustration, and do not limit the structure of the conductive bush 2 or the copper bar 4.
The welding of the welding bush and the copper bar 4 by the brazing device in the embodiment has the following advantages:
(1) the brazing device can directly perform high-temperature brazing on the part needing brazing, the whole product does not need to be heated, the brazing time is greatly saved, and the production efficiency is improved.
(2) The copper bar 4 has good outward appearance after the welding, and the whole size of copper bar 4 can not change and satisfy automatic assembly demand.
(3) The contact resistance between the bush and the copper bar 4 can be stably controlled, for example: the brazing device in the embodiment can stably control the contact resistance of the bushing and the copper bar 4 to be below 1 micro ohm after welding and combination.
(4) The equipment has small floor area, cheap equipment, short process and low cost.
The second embodiment of the present invention relates to a brazing device, as shown in fig. 2, the second embodiment is a modification of the first embodiment, and is characterized in that a groove 10 is formed in the first electrode 11, and the groove 10 is used for fixing the conductive bush 2, so as to avoid the displacement of the conductive bush 2 in the process that the movable cylinder 5 pushes the second electrode 12 to apply pressure to the first electrode 11, and ensure that the welding position of the conductive bush 2 and the copper bar 4 is accurate.
The first electrode 11 includes: a bearing part 111 for bearing the conductive bush 2 and at least two movable clamping parts 112; the at least two movable holding portions 112 are located above the bearing portion 111, and form a groove 10 with the bearing portion 111 at the first position, and the at least two movable holding portions 112 fix the conductive lining 2 in the groove 10 at the first position.
That is to say, the first electrode 11 includes a bearing portion 111 and at least two movable clamping portions 112 located above the bearing portion 111, the conductive bush 2 can be placed at a first position of the bearing portion 111, the at least two movable clamping portions 112 converge from the periphery to the first position to clamp and fix the conductive bush 2, at this time, the clamping portions 112 converge at the first position and form a groove 10, and the conductive bush 2 is located in the groove 10. In this embodiment, at least two movable clamping portions 112 can form the grooves 10 with different sizes, so as to clamp and fix the conductive bushings 2 with different sizes.
A third embodiment of the present invention relates to a brazing apparatus, and is a modification of the first embodiment, as shown in fig. 3, and is different in that the brazing apparatus further includes: a working water tank 6; the first electrode 11 is arranged in the working water tank 6, so that the welding process can be completed in water, and the annealing and softening of materials caused by overheating of the copper bar 4 can be avoided; and because high temperature is generated in the welding process, the water is gasified to generate a local vacuum environment, so that protective layers with extremely low oxygen content parameters are formed on the surfaces of the copper bars 4 and the conductive bushings 2, the conductive bushings 2 and the copper bars 4 are prevented from being oxidized and blackened, and therefore additional gas protection is not needed.
Optionally, a lifting platform 7 is disposed below the first electrode 11, and the lifting platform 7 is configured to drive the first electrode 11 to extend out of or into the working water tank 6. Therefore, when the lifting platform 7 drives the first electrode 11 to rise and extend out of the water tank, the conductive bush 2 can be fixed on the first electrode 11, and then the lifting platform 7 drives the first electrode 11 to fall and extend into the water tank, and then welding can be started. First electrode 11 can stretch into automatically or stretch out the surface of water, need not the staff and fixes electrically conductive bush 2 on first electrode 11 in aqueous, has reduced the work degree of difficulty.
Optionally, the brazing apparatus further comprises: a connecting wire 9 for connecting the first electrode 11 and the power supply 8, wherein the power supply 8 is arranged outside the working water tank 6; the working water tank 6 is provided with a through hole, and the connecting wire 9 passes through the through hole to supply power to the first electrode 11. In the embodiment, a connection mode of the power supply 8 and the first electrode 11 is provided, and optionally, the connection wire 9 can be connected with the first electrode 11 by penetrating through the inside of the lifting platform 7.
A fourth embodiment of the present invention relates to a brazing method applied to the brazing apparatus according to any one of the above embodiments. Fig. 4 shows a schematic flow chart of the brazing method in the present embodiment:
step 101: the conductive liner is secured to the first electrode.
Step 102: and placing brazing filler metal at the welding part of the conductive bushing, placing the copper bar above the conductive bushing with the brazing filler metal, and aligning the copper bar with the conductive bushing.
Step 103: the copper bar is pressed on the conductive bush and the first electrode and the second electrode are electrified to short circuit the first electrode and the second electrode.
Specifically, in the above steps 101 to 103, the movable cylinder is used to drive the second electrode to press and hold the copper bar on the conductive bushing, and the power supply supplies power to the first electrode and the second electrode, so that the first electrode and the second electrode are short-circuited when the copper bar is pressed and covered on the conductive bushing by the second electrode. The first electrode and the second electrode which are made of tungsten are electrified and short-circuited to generate instant high temperature which can reach 800-1000 ℃ during welding, and then the high temperature is transmitted to the brazing filler metal through the copper bar and the conductive bush; because copper bar and conductive lining self also can produce the high fever when first electrode and second electrode short circuit, consequently can make the brazing filler metal be heated and reach the melting point with higher speed. Reuse the activity cylinder of welding machine body and promote the second electrode and exert pressure to first electrode and make the even extrusion of brazing filler metal spill over, so make between brazing filler metal, bush and the copper bar evenly adhere to the laminating, for the combination between the molecule between the three, guaranteed electric conductive property and cohesion, for example: the torque of the brazing device in the embodiment can reach 45N/m after the conductive bushing and the copper bar are welded.
In the embodiment, high-temperature brazing can be directly carried out on the part needing brazing, the whole product does not need to be heated, the whole process time is reduced from 60 minutes to about 25 seconds, the brazing time is greatly saved, and the production efficiency is improved. Whole in-process can not put into high temperature equipment with copper bar and bush whole and heat, consequently, can not lead to the whole size of copper bar to change to satisfy the automatic assembly demand. And because whole process promotes the second electrode by the activity cylinder of welding machine body and applys pressure to first electrode, the pressure stability is unanimous, therefore the contact resistance between bush and the copper bar can obtain stable control, for example: the brazing device in the embodiment can stably control the contact resistance of the bushing and the copper bar 4 to be below 1 micro ohm after welding and combination.
A fifth embodiment of the present invention relates to a brazing method applied to the brazing apparatus of the second embodiment. The fifth embodiment is substantially the same as the fourth embodiment, except that in this embodiment, the at least two movable clamping portions are controlled to move to the first position to converge to fix the conductive bush in the groove, so that the at least two movable clamping portions can form grooves with different sizes, thereby clamping and fixing the conductive bushes with different sizes.
Fig. 5 shows a schematic flow chart of the brazing method in the present embodiment, which specifically includes:
step 201: and placing the conductive bush on the bearing part, and controlling the at least two movable clamping parts to move to the first position for polymerization so as to fix the conductive bush in the groove.
In this embodiment, the first electrode includes a carrying portion and at least two movable clamping portions located above the carrying portion, the conductive bushing can be placed at a first position of the carrying portion, the at least two movable clamping portions converge from the periphery to the first position to clamp and fix the conductive bushing, at this time, the clamping portions converge at the first position to form a groove, and the conductive bushing is located in the groove. In this embodiment, at least two movable clamping portions can form different sizes of grooves, so that the conductive bushings with different sizes can be clamped and fixed.
Step 202: and solder is placed at the welding part of the conductive bush, the copper bar is placed above the conductive bush with the solder, and the copper bar is aligned with the conductive bush.
Step 203: and pressing the copper bar on the conductive bush, and electrifying the first electrode and the second electrode to short circuit the first electrode and the second electrode.
Step 202 and step 203 in this embodiment are substantially the same as step 102 and step 103 in the first embodiment, and are not described again in this embodiment to avoid repetition.
A sixth embodiment of the present invention relates to a brazing method applied to the brazing apparatus in the third embodiment. The fifth embodiment is substantially the same as the fourth embodiment, except that the welding process is completed in water, so that the material annealing and softening caused by overheating of the copper bar can be avoided; and a protective layer with extremely low oxygen content parameters can be formed on the surface of the copper bar, so that the welding part of the conductive lining and the copper bar is prevented from being oxidized and blackened.
Fig. 6 shows a schematic flow chart of the brazing method in the present embodiment, which specifically includes:
step 301: the conductive liner is secured to the first electrode.
Step 302: and solder is placed at the welding part of the conductive bush, the copper bar is placed above the conductive bush with the solder, and the copper bar is aligned with the conductive bush.
Step 301 and step 302 in this embodiment are substantially the same as step 101 and step 102 in the first embodiment, and are not repeated in this embodiment to avoid repetition.
Step 303: and extending the second electrode into the working water tank to press the copper bar on the conductive lining.
Step 304: the first electrode and the second electrode are energized to short-circuit the first electrode and the second electrode.
Specifically, the second electrode is stretched into the working water tank to press the copper bar on the conductive lining, namely, the welding process is completed in water, so that the material annealing and softening caused by overheating of the copper bar can be avoided; and because high temperature is generated in the welding process, the water is gasified to generate a local vacuum environment, so that a protective layer with extremely low oxygen content parameters is formed on the surface of the copper bar, and the welding part of the conductive bushing and the copper bar is prevented from being oxidized and blackened.
Further, before the conductive bush is fixed to the first electrode, the method further comprises the steps of; moving the first electrode out of the working water tank; after the conductive bush is fixed on the first electrode and before the copper bar is pressed on the conductive bush, the method further comprises the following steps: and extending the first electrode fixed with the conductive lining into a working water tank. Therefore, when the first electrode rises and extends out of the water tank, the conductive lining can be fixed on the first electrode, and then the first electrode descends and extends into the water tank, so that welding can be started. That is to say, first electrode can stretch into automatically or stretch out the surface of water, need not the staff and fixes electrically conductive bush on first electrode in aqueous, has reduced the work degree of difficulty.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. A brazing apparatus, comprising: the welding machine body is used for welding the conductive bushing and the copper bar together;
the welder body includes: the first electrode and the second electrode are oppositely arranged, the first electrode is used for bearing the conductive lining, the brazing filler metal and the copper bar which are to be welded and are arranged in a stacked mode, and the materials of the first electrode and the second electrode both comprise tungsten;
the welding machine body further comprises: the movable air cylinder is connected with the second electrode, and the power supply is respectively connected with the first electrode and the second electrode;
the movable cylinder is used for driving the second electrode to press the copper bars on the conductive lining;
the power supply is used for supplying power to the first electrode and the second electrode, so that the first electrode and the second electrode are in short circuit when the second electrode presses the copper bar on the conductive bushing.
2. The brazing apparatus according to claim 1, wherein the first electrode is formed with a groove for fixing the conductive bushing.
3. The brazing apparatus of claim 2, wherein the first electrode comprises: the bearing part is used for bearing the conductive bushing, and the at least two movable clamping parts;
at least two movable clamping parts are located bearing part top, and in first position department with the bearing part encloses and establishes the formation the recess, at least two movable clamping parts are in first position department will the electrically conductive bush is fixed in the recess.
4. The brazing apparatus of claim 1, further comprising: a working water tank; the first electrode is arranged in the working water tank.
5. The brazing device according to claim 4, wherein a lifting platform is arranged below the first electrode and used for driving the first electrode to extend out of or into the working water tank.
6. The brazing apparatus of claim 4, further comprising: the connecting wire is used for connecting the first electrode and the power supply, and the power supply is arranged outside the working water tank;
the working water tank is provided with a through hole, and the connecting wire penetrates through the through hole to supply power to the first electrode.
7. A brazing method characterized by being applied to the brazing apparatus of any one of the preceding claims 1 to 6;
the brazing method comprises the following steps:
securing the conductive bushing to the first electrode;
placing brazing filler metal at the welding position of the conductive bushing, placing the copper bar above the conductive bushing with the brazing filler metal placed, and aligning the copper bar with the conductive bushing;
and pressing the copper bar on the conductive bush, and electrifying the first electrode and the second electrode to enable the first electrode and the second electrode to be in short circuit.
8. The brazing method according to claim 7, wherein when the brazing apparatus is the brazing apparatus according to claim 3;
the securing the conductive bushing to the first electrode comprises:
and placing the conductive lining on the bearing part, and controlling at least two movable clamping parts to move to a first position for polymerization so as to fix the conductive lining in the groove.
9. The brazing method according to claim 7, wherein when the brazing apparatus is the brazing apparatus according to claim 4;
said pressing said copper bar against said conductive bushing and energizing said first and second electrodes to short circuit said first and second electrodes, comprising:
extending the second electrode into the working water tank to press the copper bar on the conductive lining;
energizing the first electrode and the second electrode to short the first electrode and the second electrode.
10. The brazing method according to claim 7, wherein when the brazing apparatus is the brazing apparatus according to claim 5;
before the step of fixing the conductive bush to the first electrode, the method further comprises the following steps;
moving the first electrode out of the working water tank;
after the fixing the conductive bush to the first electrode and before the pressing the copper bar on the conductive bush, further comprising: and extending the first electrode fixed with the conductive lining into the working water tank.
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| CN202110311811.3A CN115121896A (en) | 2021-03-24 | 2021-03-24 | Brazing device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1085746A (en) * | 1965-04-22 | 1967-10-04 | Ford Motor Co | Resistance brazing process |
| CN201960236U (en) * | 2011-02-24 | 2011-09-07 | 苏州市艾西依钣金制造有限公司 | Copper brazing graphite electrode |
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| CN108994409A (en) * | 2018-08-30 | 2018-12-14 | 张洪涛 | A kind of radiant heating and energization resistance heating composite welding device |
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| GB1085746A (en) * | 1965-04-22 | 1967-10-04 | Ford Motor Co | Resistance brazing process |
| CN201960236U (en) * | 2011-02-24 | 2011-09-07 | 苏州市艾西依钣金制造有限公司 | Copper brazing graphite electrode |
| CN102825372A (en) * | 2011-06-14 | 2012-12-19 | 深圳市鹏煜威科技有限公司 | Copper-aluminum column resistance welder and welding control method thereof |
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| CN108994409A (en) * | 2018-08-30 | 2018-12-14 | 张洪涛 | A kind of radiant heating and energization resistance heating composite welding device |
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