CN110911232A - Binding post assembly and brazing method and brazing tool thereof - Google Patents
Binding post assembly and brazing method and brazing tool thereof Download PDFInfo
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- CN110911232A CN110911232A CN201911082906.1A CN201911082906A CN110911232A CN 110911232 A CN110911232 A CN 110911232A CN 201911082906 A CN201911082906 A CN 201911082906A CN 110911232 A CN110911232 A CN 110911232A
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- brazing
- terminal
- ceramic
- binding post
- assembly according
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/14—Terminal arrangements
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
-
- 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
-
- 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
- B23K3/087—Soldering or brazing jigs, fixtures or clamping means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H49/00—Apparatus or processes specially adapted to the manufacture of relays or parts thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Abstract
The invention provides a wiring terminal assembly which comprises a wiring terminal and a ceramic piece, wherein a step is arranged in the middle of the wiring terminal, threads are arranged at two ends of the wiring terminal, the wiring terminal is made of dispersion strengthened copper, a through inner hole is formed in the middle of the ceramic piece, the wiring terminal is inserted into the inner hole of the ceramic piece, the step of the wiring terminal is attached to the ceramic piece, and the attachment surface of the wiring terminal and the attachment surface of the ceramic piece are fixedly connected through brazing. According to the invention, the binding post is processed by selecting the dispersion strengthened copper material, so that the mechanical property of the binding post is improved, and the binding post has better conductivity. The binding force between the ceramic and the metal is improved and strengthened by carrying out surface modification on the brazing surfaces of the binding post and the ceramic piece, the brazing quality is improved, and a special brazing tool is designed by adopting a furnace brazing process, so that the brazing quality is further improved, the mechanical strength of the brazing surface is improved, and the sealing requirement is met.
Description
Technical Field
The invention belongs to the field of contactors, and particularly relates to a terminal assembly for a sealed contactor, a brazing method and a brazing tool for the terminal assembly.
Background
The contactor is widely applied to electric power, power distribution and power utilization occasions due to the large load current (5A-1000A). Along with the development of demand, sealed requirement has appeared in the contactor, and the terminal subassembly is formed through brazing connection to the ceramic that prior art often adopted and terminal, and the ceramic plays insulating effect, brazes to form sealed, and the terminal transmits current. Wherein the mechanical strength of the binding post and the quality of the brazing welding seam at the joint between the ceramic and the binding post directly influence the service performance and reliability of the product.
The wiring terminal is required to ensure good conductivity, and is usually processed by copper materials. When pure copper materials are selected, the conductivity is good, but the mechanical strength of the pure copper materials is poor, and when the torque borne by the binding post is too large, the leakage and the failure of the product can be caused; when brass or beryllium bronze is selected, the material has high resistivity, and the contactor has high load current, so that the product has high temperature rise, is easy to burn and has poor reliability. The above-mentioned reasons restrict the further development of the sealing contactor.
Disclosure of Invention
In order to solve the technical problem, the invention provides the wiring post assembly, the wiring post is processed by selecting the dispersion strengthened copper material, the mechanical property of the wiring post is improved, and meanwhile, the wiring post assembly has better conductivity.
The invention is realized by the following technical scheme:
the utility model provides a terminal subassembly, including terminal and ceramic member, the terminal is the cylinder, the terminal middle part is provided with the step, the both ends of terminal are provided with the screw thread, the terminal material is dispersion strengthening copper, can guarantee mechanical strength, can guarantee load strength again, open at the ceramic member middle part has the hole that link up, the terminal inserts in the hole of ceramic member, the step and the ceramic member laminating of terminal, pottery plays insulating effect, the binding face of terminal and ceramic member is through the fixed connection of brazing, it is sealed to braze the formation, and the operation requirement is satisfied.
One end of the ceramic piece is provided with a step, so that the ceramic piece is convenient to install and position.
The brazing method of the lug assembly comprises the following steps of:
step 1: placing a binding post on a ceramic part, placing brazing solder on a welding seam between the binding post and the ceramic part, forming a binding post assembly by the binding post, the ceramic part and the brazing solder, and placing the brazing solder on a brazing interface in advance so as to perform furnace brazing;
step 2: placing the wiring terminal assembly in the first step into a brazing tool, and ensuring the positioning of the wiring terminal and the ceramic piece through the brazing tool so as to ensure the brazing quality;
and step 3: putting the wiring column assembly and the brazing tool into a furnace brazing device together, introducing protective gas, then electrifying for heating, keeping the temperature for a period of time after reaching the brazing temperature, melting brazing solder and spreading along the interface of a brazing joint, ensuring the sealing property between the wiring column and the ceramic piece after brazing after the liquid brazing filler metal completely fills the whole brazing seam, and discharging the brazing filler metal after the power is off for cooling and the liquid brazing filler metal is solidified to the room temperature.
The pretreatment before the binding post is inserted into the ceramic piece in the step 1 comprises the following steps:
step 11: the brazing surface of the binding post is plated with nickel, the thickness of the nickel layer is 3 mu-5 mu, the surface is modified, and the brazing quality is improved.
The pretreatment before the binding post is inserted into the ceramic piece in the step 1 comprises the following steps:
step 12: the brazing surface of the ceramic piece is plated with nickel, the thickness of the nickel layer is 3 mu-5 mu, the surface is modified, the bonding force between the ceramic and the metal is improved and strengthened, the brazing quality is improved, and the sealing requirement is met.
The pretreatment before nickel plating of the brazing surface of the ceramic piece in the step 12 comprises the following steps:
step 13: the brazing surface of the ceramic piece is metallized and surface modified, so that the binding force of the ceramic piece and the nickel plating layer is improved, and the brazing quality is improved.
The grade of brazing solder in the step 1 is HLAgCu 28.
And 3, the brazing temperature of the furnace brazing process parameter in the step 3 is 790 +/-5 ℃, and brazing solder is ensured to be melted in the furnace and spread along the interface of the brazing joint so as to complete brazing.
And 3, the heat preservation time of the brazing process parameters in the furnace in the step 3 is 8-12 min, so that the liquid brazing filler metal can completely fill the whole welding line after the brazing solder is melted, and the brazing quality is ensured.
A brazing tool for a terminal assembly comprises a pressing block, a positioning block and a supporting block, wherein the positioning block is sleeved on threads at the upper end of a terminal, the terminal assembly is positioned in the brazing process, the pressing block is arranged on the positioning block, the pressing block uniformly applies pressure to the positioning block by means of self weight, the positioning block transmits the pressure to the terminal assembly and uniformly applies pressure to the terminal assembly, stable and proper pressure is applied to the terminal assembly, the terminal, a ceramic assembly and brazing welding fluxes are kept in tight contact, meanwhile, gaps between the brazing welding seams of the ceramic and the terminal are uniform, the brazing welding fluxes are favorably distributed and filled uniformly, the brazing quality is improved, and further the mechanical strength of a brazing surface is improved; the supporting shoe cover is on terminal lower extreme screw thread, can provide stable support to terminal subassembly in the brazing process, guarantees the quality of brazing.
In conclusion, the mechanical strength of the binding post and the mechanical strength of the brazing surface of the binding post and the ceramic part are improved, and the torque borne by the binding post assembly is finally improved, so that the service performance and the reliability of the sealed contactor product are improved, and the further development of the product is promoted.
The invention has the beneficial effects that:
compared with the prior art, the wiring terminal is processed by selecting the dispersion strengthened copper material, so that the mechanical property of the wiring terminal is improved, and the wiring terminal has better conductivity. Through carrying out surface modification to the brazing face of terminal and ceramic part, improve and strengthen the cohesion between pottery and the metal, improved the quality of brazing, and adopt the stove technology of brazing, design special frock of brazing, the brazing welding seam clearance of pottery and terminal is even, further improved the quality of brazing, the mechanical strength of the face of brazing has been improved, not only satisfy sealed requirement, the moment of torsion that still improves the terminal subassembly and bore, thereby improve the performance and the reliability of sealed contactor product, promote the further development of this type of product.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the present invention when it is installed in a brazing tool.
In the figure: 1-binding post, 2-ceramic piece, 3-brazing solder, 4-briquetting, 5-positioning block and 6-supporting block.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in figure 1, a terminal subassembly, including terminal 1 and ceramic part 2, terminal 1 is the cylinder, terminal 1 middle part is provided with the step, terminal 1's both ends are provided with the screw thread, terminal 1 material is dispersion strengthening copper, mechanical strength can be guaranteed, can guarantee load strength again, open at 2 middle parts of ceramic part has the hole that link up, terminal 1 inserts in the hole of ceramic part 2, terminal 1's step and the laminating of ceramic part 2, ceramic part 2 has insulating effect, terminal 1 is through brazing fixed connection with the binding face of ceramic part 2, it is sealed to braze the formation, and the service requirement is satisfied.
The step is arranged at one end of the ceramic part 2, so that the installation and the positioning are convenient.
The brazing method of the lug post assembly comprises the following steps of:
step 1: placing a binding post 1 on a ceramic part 2, placing brazing solder 3 on a welding seam between the binding post 1 and the ceramic part 2, forming a binding post assembly by the binding post 1, the ceramic part 2 and the brazing solder 3, and placing the solder on a brazing interface in advance so as to perform furnace brazing;
step 2: placing the binding post assembly in the first step into a brazing tool, and ensuring the positioning of the binding post 1 and the ceramic part 2 through the brazing tool so as to ensure the brazing quality;
and step 3: putting the wiring column assembly and the brazing tool into a furnace brazing device together, introducing protective gas, then electrifying for heating, keeping the temperature for a period of time after reaching the brazing temperature, melting brazing solder 3 and spreading along the interface of a brazing joint, ensuring the sealing property between the wiring column 1 and the ceramic part 2 after brazing after the liquid brazing filler metal completely fills the whole brazing seam, and discharging the brazing filler metal after power-off cooling and the liquid brazing filler metal is solidified to the room temperature.
When the wiring terminal 1 is processed by using dispersion strengthened copper, although the mechanical strength is improved, the load strength can be ensured, the soldering performance is poor because the wiring terminal contains nano-scale alumina particles, the soldering quality of the product is poor, the leakage failure is caused, and meanwhile, the wiring terminal is applied to ceramic soldering, and the soldering difficulty is high. It is therefore necessary to pretreat the stud 1 and the ceramic piece 2 to improve the brazing quality.
The pretreatment before the binding post 1 is inserted into the ceramic piece 2 in the step 1 comprises the following steps:
step 11: the brazing surface of the binding post 1 is plated with nickel, the thickness of the nickel layer is 3 mu-5 mu, the surface is modified, and the brazing quality is improved.
The pretreatment before the binding post 1 is inserted into the ceramic piece 2 in the step 1 comprises the following steps:
step 12: the brazing surface of the ceramic piece 2 is plated with nickel, the thickness of the nickel layer is 3 mu-5 mu, the surface is modified, the bonding force between the ceramic and the metal is improved and strengthened, the brazing quality is improved, and the sealing requirement is met.
The pretreatment before nickel plating of the brazing surface of the ceramic piece 2 in the step 12 comprises the following steps:
step 13: the brazing surface of the ceramic piece 2 is metallized and surface modified, so that the binding force of the ceramic piece 2 and the nickel plating layer is improved, and the brazing quality is improved.
The grade of the brazing solder 3 in the step 1 is HLAgCu 28.
The brazing temperature of the furnace brazing process parameters in the step 3 is 790 +/-5 ℃, and the brazing solder 3 is ensured to be melted in the furnace and spread along the interface of the brazing joint so as to complete brazing.
And (3) the heat preservation time of the brazing process parameters in the furnace in the step (3) is 8-12 min, so that the liquid brazing filler metal can completely fill the whole welding line after the brazing solder 3 is melted, and the brazing quality is ensured.
The brazing tool for the lug assembly comprises a pressing block 4, a positioning block 5 and a supporting block 6, wherein the positioning block 5 is sleeved on the upper end thread of the lug 1 and used for positioning the lug assembly in the brazing process, as shown in fig. 2; the pressing block 4 is arranged on the positioning block 5, the pressing block 4 uniformly applies pressure to the positioning block 5 by means of self weight, the positioning block 5 transmits the pressure to the wiring terminal assembly and uniformly applies pressure to the wiring terminal assembly, stable and proper pressure is applied to the wiring terminal assembly, the wiring terminal 1, the ceramic part 2 and the brazing solder 3 are kept in close contact, meanwhile, gaps between brazing welds of the ceramic part 2 and the wiring terminal 1 are uniform, uniform flow distribution and gap filling of the brazing solder 3 are facilitated, brazing quality is improved, and mechanical strength of a brazing surface is further improved; the supporting block 6 is sleeved on the lower end thread of the binding post 1, so that stable support can be provided for the binding post assembly in the brazing process, and the brazing quality is ensured.
In conclusion, the mechanical strength of the wiring terminal 1 and the mechanical strength of the brazing surface of the wiring terminal 1 and the ceramic part 2 are improved, and the torque borne by the wiring terminal assembly is finally improved, so that the service performance and the reliability of a sealed contactor product are improved, and the further development of the product is promoted.
According to the wiring terminal assembly provided by the invention, the wiring terminal is processed by selecting the dispersion strengthened copper material, so that the mechanical property of the wiring terminal is improved, and meanwhile, the wiring terminal assembly has better conductivity. Through carrying out surface modification to the brazing face of terminal and ceramic part, improve and strengthen the cohesion between pottery and the metal, improved the quality of brazing, and adopt the stove technology of brazing, design special frock of brazing, the brazing welding seam clearance of pottery and terminal is even, further improved the quality of brazing, the mechanical strength of the face of brazing has been improved, not only satisfy sealed requirement, the moment of torsion that still improves the terminal subassembly and bore, thereby improve the performance and the reliability of sealed contactor product, promote the further development of this type of product.
Claims (10)
1. A terminal assembly comprising a terminal (1) and a ceramic part (2), characterized in that: terminal (1) is the cylinder, and terminal (1) middle part is provided with the step, and the both ends of terminal (1) are provided with the screw thread, and terminal (1) material is dispersion strengthening copper, open ceramic member (2) middle part has the hole that link up, and in terminal (1) inserted the hole of ceramic member (2), the step and the laminating of ceramic member (2) of terminal (1), terminal (1) and the binding face of ceramic member (2) are through brazing fixed connection.
2. The terminal assembly of claim 1, wherein: one end of the ceramic piece (2) is provided with a step.
3. A method of brazing a lug assembly according to any of claims 1 or 2, produced by the steps of:
step 1: placing a binding post (1) on a ceramic part (2), placing brazing solder (3) on a welding line between the binding post (1) and the ceramic part (2), and forming a binding post assembly by the binding post (1), the ceramic part (2) and the brazing solder (3);
step 2: putting the wiring terminal assembly in the first step into a brazing tool;
and step 3: putting the terminal post assembly and the brazing tool into a furnace brazing device together, introducing protective gas, then electrifying for heating, keeping the temperature for a period of time after the brazing temperature is reached, melting brazing solder (3) and spreading along the interface of a brazing joint, and after the liquid brazing filler metal completely fills the whole brazing seam, powering off for cooling, and discharging the liquid brazing filler metal after the liquid brazing filler metal is solidified to the room temperature.
4. A method of brazing a lug assembly according to claim 3, wherein the pretreatment before the terminal is inserted into the ceramic member (2) in step 1 comprises the steps of:
step 11: the soldering surface of the binding post (1) is plated with nickel, and the thickness of the nickel layer is 3 mu-5 mu.
5. A method of brazing a lug assembly according to claim 3, wherein the pretreatment before the terminal is inserted into the ceramic member (2) in step 1 comprises the steps of:
step 12: the brazing surface of the ceramic piece (2) is plated with nickel, and the thickness of the nickel layer is 3 mu-5 mu.
6. The method for soldering a stud assembly according to claim 5, wherein the pretreatment before plating the soldering surface of the ceramic member (2) with nickel in step 12 comprises the steps of:
step 13: the brazing surface of the ceramic piece (2) is metallized.
7. A method of brazing a lug assembly according to claim 3, wherein: the grade of the brazing solder (3) in the step 1 is HLAgCu 28.
8. A method of brazing a lug assembly according to claim 3, wherein: the brazing temperature of the furnace brazing process parameters in the step 3 is 790 +/-5 ℃.
9. A method of brazing a lug assembly according to claim 3, wherein: and the heat preservation time of the brazing process parameters in the furnace in the step 3 is 8-12 min.
10. A brazing tool for a stud assembly according to any one of claims 1 or 2, wherein: including briquetting (4), locating piece (5) and supporting shoe (6), locating piece (5) cover is on terminal (1) upper end screw thread, and briquetting (4) set up on locating piece (5), and supporting shoe (6) cover is on terminal (1) lower extreme screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911082906.1A CN110911232A (en) | 2019-11-07 | 2019-11-07 | Binding post assembly and brazing method and brazing tool thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911082906.1A CN110911232A (en) | 2019-11-07 | 2019-11-07 | Binding post assembly and brazing method and brazing tool thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110911232A true CN110911232A (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911082906.1A Pending CN110911232A (en) | 2019-11-07 | 2019-11-07 | Binding post assembly and brazing method and brazing tool thereof |
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| CN (1) | CN110911232A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114083240A (en) * | 2021-11-29 | 2022-02-25 | 贵州天义电器有限责任公司 | Welding method for two-body conductive block |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201985295U (en) * | 2011-01-24 | 2011-09-21 | 吕宝林 | Thermal injection-molding formed ceramic wiring terminal |
| CN108314459A (en) * | 2017-01-16 | 2018-07-24 | 贵州天义电器有限责任公司 | Ceramics and binding post soldering connection process in a kind of sealing high voltage connector |
| CN109516830A (en) * | 2018-11-15 | 2019-03-26 | 贵州天义电器有限责任公司 | Ceramics and seat board, binding post soldering connection technique in a kind of high pressure sealing contactor |
| CN109859990A (en) * | 2019-02-21 | 2019-06-07 | 厦门宏发电力电器有限公司 | A kind of face terminals of high voltage direct current relay |
-
2019
- 2019-11-07 CN CN201911082906.1A patent/CN110911232A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201985295U (en) * | 2011-01-24 | 2011-09-21 | 吕宝林 | Thermal injection-molding formed ceramic wiring terminal |
| CN108314459A (en) * | 2017-01-16 | 2018-07-24 | 贵州天义电器有限责任公司 | Ceramics and binding post soldering connection process in a kind of sealing high voltage connector |
| CN109516830A (en) * | 2018-11-15 | 2019-03-26 | 贵州天义电器有限责任公司 | Ceramics and seat board, binding post soldering connection technique in a kind of high pressure sealing contactor |
| CN109859990A (en) * | 2019-02-21 | 2019-06-07 | 厦门宏发电力电器有限公司 | A kind of face terminals of high voltage direct current relay |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114083240A (en) * | 2021-11-29 | 2022-02-25 | 贵州天义电器有限责任公司 | Welding method for two-body conductive block |
| CN114083240B (en) * | 2021-11-29 | 2024-03-01 | 贵州天义电器有限责任公司 | Welding method for two-body conductive block |
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