CN117259940A - Welding process for welding lug of circuit breaker contact assembly - Google Patents
Welding process for welding lug of circuit breaker contact assembly Download PDFInfo
- Publication number
- CN117259940A CN117259940A CN202311155880.5A CN202311155880A CN117259940A CN 117259940 A CN117259940 A CN 117259940A CN 202311155880 A CN202311155880 A CN 202311155880A CN 117259940 A CN117259940 A CN 117259940A
- Authority
- CN
- China
- Prior art keywords
- welding
- lug
- contact support
- contact
- lug belt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 211
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000003825 pressing Methods 0.000 claims description 26
- 238000005476 soldering Methods 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000004907 flux Effects 0.000 abstract description 3
- 229910001325 element alloy Inorganic materials 0.000 abstract description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 230000003068 static effect Effects 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/002—Resistance welding; Severing by resistance heating 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/02—Pressure butt welding
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—Auxiliary equipment
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
Abstract
The invention provides a welding process of a welding lug of a circuit breaker contact assembly, which comprises a welding device and a welding method, wherein the welding process is used for completing automatic welding of the welding lug on a contact support through the cooperation of an upper electrode, a lower electrode, a contact support moving and positioning device and a welding lug belt moving and positioning device, the contact support and the manual welding are not required to be manually placed, and the welding quality of the contact assembly is ensured by filling a welding surface of a contact and the support after the welding flux is melted and forming a multi-element alloy, so that the joint strength with higher quality is obtained; the invention can improve the production efficiency, reduce the production cost and improve the welding quality.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a welding process of a miniature circuit breaker contact assembly soldering lug.
Background
The miniature circuit breaker (English name: micro Circuit Breaker) is also called miniature circuit breaker (Miniature Circuit Breaker), is suitable for overload and short-circuit protection of the line from the rated voltage of 230/400V to the rated current of 63A at the alternating current of 50/60Hz, and can also be used as the infrequent operation conversion of the line under normal conditions. Miniature circuit breakers are used in a wide variety of locations including industrial, commercial, high-rise and residential homes.
The contact assembly is one of key contact parts of the electrical switch, the main performance and the service life of the electrical switch are greatly dependent on the welding quality of the contact assembly, and the welding process and the welding method play a very important role besides the quality of raw materials. The contact of the miniature circuit breaker generally adopts a traditional metal electrode resistance welding process due to relatively complex shape and smaller size, a support of a contact static component generally adopts a copper alloy material or a copper plated steel strip material according to different application requirements of products, and the contact adopts an AgC material.
Conventional methods for adding soldering lugs to AgC contacts generally employ a manual placing or soldering lug coating process on the contacts. The automation can not be realized in manual placement, production efficiency is low, and simultaneously the placement position precision is relatively poor, and the stability of the welding quality of products is affected. AgC contact covers the lug and carries out the heating after also putting the lug through the manual and makes the lug bond on the contact, manufacturing cost is higher, and the lug often appears closed cavity, leads to the welding in the lug gas to be unable to discharge completely, causes the fine cavity of welding face, influences welding quality stability.
Disclosure of Invention
The invention aims to overcome the defects and the shortcomings in the prior art and provides a welding process of a miniature circuit breaker assembly soldering lug, which specifically comprises a welding method and a welding device, and the technical scheme adopted by the invention is as follows:
the miniature circuit breaker contact assembly comprises a contact support and a soldering lug belt, wherein the soldering lug belt is made of Ag-based or other alloy materials with the width of 3-10 mm, the thickness of 0.03-0.2 mm and the length of more than 200mm, such as Ag 15 CuP，AgCu 28 Etc.;
in a first aspect, the welding process of the present invention includes a welding apparatus having the structure:
the upper electrode is used for pressing the welding lug belt on the welding surface of the contact support to be welded and welding the welding lug belt and the welding surface of the contact support to be welded;
the lower electrode comprises a contact support base and is used for supporting and welding the contact support;
the contact support moving and positioning device comprises a positioning clamp and a first driving cylinder for controlling the opening, closing and moving of the positioning clamp, wherein a clamping cavity matched with the shape of the contact support is formed in the positioning clamp;
the welding strip moving and positioning device comprises a welding strip moving device and a welding strip clamping device, wherein the welding strip moving device comprises a second driving cylinder which is used for driving the welding strip clamping device to displace (front and back);
the welding lug belt clamping device comprises a welding lug belt supporting rail for supporting and orienting the welding lug belt, and further comprises a pressing block and a pressing cylinder, wherein one end of the welding lug belt is pressed on the welding lug belt supporting rail by the pressing block under the driving of the pressing cylinder.
Further, the welding lug belt moving device further comprises a welding lug belt clamping device for supporting the sliding table and a welding lug belt clamping device for supporting the sliding table cylinder; and the welding lug belt clamping device supporting sliding table drives the welding lug belt clamping device to move up and down relative to the contact support base under the driving of the welding lug belt clamping device supporting sliding table cylinder.
In a second aspect, the present invention provides a welding apparatus for welding, the welding method comprising:
step one, placing a contact support: starting a contact support moving and positioning device, enabling a positioning clamp to clamp a contact support by a first driving cylinder, and then enabling the positioning clamp to move the contact support to be welded to a contact support supporting seat on a lower electrode and to be positioned at a welding position;
placing a welding sheet belt on a welding sheet belt supporting rail, enabling one end of the welding sheet belt to be arranged below a pressing block and to be spaced a certain distance from the pressing block, wherein the distance between the welding sheet belt and the pressing block is about 0.1mm, the welding sheet belt with the reserved contact length is arranged in front of the pressing block, starting a pressing cylinder to enable the pressing block to press the welding sheet belt, and enabling a second driving cylinder to drive a welding sheet belt clamping device to move one end of the welding sheet belt to a position to be welded to the surface of a contact support;
reserving the length of the welding lug, driving the upper electrode to press down through a motor, separating the pressing block from the welding lug belt when the upper electrode presses the position to be welded of the welding lug belt and the contact support, and driving the welding lug belt clamping device to move backwards along the contact support base through the second driving cylinder, wherein the upper electrode presses the position to be welded of the welding lug belt, so that the welding lug belt exposes the length of the welding lug required by the second welding;
fourthly, welding the welding lug, pressing the welding lug belt again by the welding lug belt clamping device, resetting the contact support moving and positioning device, electrifying the upper electrode and the lower electrode to weld according to preset welding parameters such as welding time, current, pressure and the like, softening the position of the welding lug to be welded on the welding lug belt, and when the physical tensile strength of the welding lug belt is reduced to be smaller than the tensile force of the welding lug belt moving device, breaking the welding lug belt (the tensile force generated in the resetting process of the welding lug belt clamping device), thereby completing the welding;
and then resetting the welding lug belt clamping device, and moving the upper electrode upwards for resetting, thereby completing the whole welding process.
The first step to the fourth step are circulated, so that the circular welding of the welding plate of the contact assembly is realized;
preferably, the method further comprises the step five: the welding device comprises at least two contact support moving and positioning devices, when a group of circulation is completed in the first to fourth steps, one contact support moving and positioning device transfers a new contact support to a welding position, and the other contact support moving and positioning device moves the contact support welded with the welding lug to the next station for contact welding.
Repeating the first step to the fifth step, and finally realizing full-automatic welding production.
The beneficial effects of the invention are as follows:
the welding process provided by the invention can finish automatic welding of the welding lug on the contact support without manually placing the contact support and manually welding, and the welding quality of the contact assembly is ensured by filling the welding surfaces of the contact and the support and forming multi-element alloy after the welding flux is melted and the welding flux has a relatively low melting point, so that the joint strength with higher quality is obtained; the invention can improve the production efficiency, reduce the production cost and improve the welding quality.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that it is within the scope of the invention to one skilled in the art to obtain other drawings from these drawings without inventive faculty.
FIG. 1 is a schematic diagram of a main structure of a welding device according to the present invention;
FIG. 2 is a schematic view of a part of a welding device according to the present invention;
FIG. 3 is a schematic diagram of the cooperation of the moving positioning device, the positioning clamp and the contact support base of the soldering lug belt;
FIG. 4 is a schematic view of the assembly of the moving positioning device for the tab belt, the tab belt and the contact support base of the present invention;
FIG. 5 is a schematic view of the positioning fixture and contact holder support of the present invention;
FIG. 6 is an enlarged view of FIG. 5 at A;
in the figure, the electrode 1-lower electrode, the electrode 2-upper electrode, the 3-positioning clamp, the 4-welding strip, the 41-welding strip supporting rail, the 5-pressing block, the 6-pressing cylinder, the 61-second driving cylinder, the 62-welding strip moving device, the 7-contact support (copper), the 71-contact support supporting seat, the 8-welding strip clamping device, the 9-welding strip clamping device supporting the sliding table, the 91-welding strip clamping device supporting block and the 10-welding strip clamping device supporting the sliding table cylinder.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.
It should be noted that, in the embodiments of the present invention, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present invention, and the following embodiments are not described one by one.
The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the invention and are not intended to limit the scope of the invention.
Example 1
A welding process of a circuit breaker contact assembly, which uses a welding device to weld a fixed contact assembly, comprises the following steps:
firstly, placing a contact support, namely placing a static contact support to be welded on a contact support supporting seat 71 through a vibration disc or a mechanical arm, wherein the contact support supporting seat 71 can be profiled according to the shape and the size of the support, so that the contact support 7 can stably move on the supporting seat, and the static contact support is made of copper alloy; and starting the positioning clamp 3 to clamp the fixed contact support, and moving the fixed contact support to the welding position of the lower electrode 1 through a positioning clamp moving cylinder.
Step two, placing the soldering lug belt, namely placing the soldering lug belt 4 on a soldering lug belt supporting rail 41, placing a solder lug compacting block 5 in a loosening state and placing the soldering lug belt 4 below the compacting block 5 at a distance of about 0.1mm, reserving the soldering lug belt with the contact length in front of the compacting block 5, starting a soldering lug belt moving cylinder (a second driving cylinder) 61, and conveying the soldering lug belt to the position above the positioned contact support 7 through a soldering lug belt moving device 62;
starting a welding strip clamping device to support a sliding table cylinder 10, enabling the welding strip clamping device to support a sliding table 9 to move downwards, enabling the welding strip clamping device 8 to move, and placing the welding strip 4 on the surface of a contact support; the tab tape being of Ag-based or other alloy material, e.g. Ag 15 CuP，AgCu 28 Etc.
Step three, reserving the length of the welding lug, starting a driving cylinder of the upper electrode, driving the upper electrode 2 to press down, starting a welding lug belt moving cylinder (a second driving cylinder) 61 to enable the welding lug belt compacting block 5 and the welding lug belt moving device 62 to move backwards and reset when the upper electrode 2 presses the welding lug belt and the copper contact support, and pulling out the welding lug required by the second welding because the upper electrode 2 presses one end of the welding lug belt, wherein the pulled-out size adjusts a limit screw of the moving cylinder in the welding lug belt moving device 62 according to the size of a contact, so that the second welding requirement is met.
Fourthly, welding the welding lug, starting a welding lug belt compressing cylinder 6 to drive a compressing block to compress the welding lug belt 4 again, starting a welding lug belt clamping device supporting sliding table cylinder 10 again, enabling a welding lug belt clamping device supporting sliding table 9 to drive a welding lug belt clamping device supporting block 91 to move upwards for resetting, further driving a welding lug belt clamping device 8 to move upwards for resetting, starting a resistance welding equipment power supply, electrifying according to preset welding parameters (welding time, current, pressure and the like), and welding; wherein the time interval between the upward moving and resetting of the welding strip clamping device 8 and the starting of the power supply of the resistance welding equipment is 0.1 second, the temperature rises in the welding process, the welding strip is softened, when the physical tensile strength of the welding strip 4 is reduced to be smaller than the tensile force of the cylinder, the welding strip 4 is broken, the upward moving of the welding strip clamping device 8 completes the resetting, the upward moving and resetting of the upper electrode 2 is completed, and the whole welding process is completed.
And fifthly, moving the product, starting the copper contact support moving clamp 3 again, and moving the copper contact support welded with the soldering lug to the next station for contact welding.
And repeating the first step to the fifth step, and finally realizing the welding production of the full-automatic static contact assembly.
The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (5)
1. The welding process of the welding lug of the circuit breaker contact assembly is characterized by comprising a welding device, wherein the welding device comprises the following structures:
the upper electrode (2) is used for pressing the welding lug belt (4) on the welding surface of the contact support (7) to be welded and welding the welding lug belt and the contact support;
the lower electrode (1) comprises a contact support base (71), and the lower electrode (1) is used for supporting and welding a contact support (7);
the contact support moving and positioning device comprises a positioning clamp (3) and a first driving cylinder for controlling the opening, closing and moving of the positioning clamp (3), wherein a clamping cavity matched with the shape of a contact support (7) is formed in the positioning clamp (3);
the welding strip moving and positioning device comprises a welding strip moving device (62) and a welding strip clamping device (8), wherein the welding strip moving device (62) comprises a second driving cylinder (61), and the second driving cylinder (61) is used for driving the welding strip clamping device (8) to move; the welding lug belt clamping device (8) comprises a welding lug belt supporting rail (41) for supporting and orienting the welding lug belt (4), and further comprises a pressing block (5) and a pressing cylinder (6), wherein one end of the welding lug belt (4) is pressed on the welding lug belt supporting rail (41) by the pressing block (5) under the driving of the pressing cylinder (6).
2. A welding process for a lug of a circuit breaker contact assembly according to claim 1, characterized in that the lug belt moving means (62) further comprises a lug belt clamping means supporting a slipway (9) and a lug belt clamping means supporting a slipway cylinder (10); the welding strip clamping device supporting sliding table (9) drives the welding strip clamping device (8) to move up and down relative to the contact support supporting seat (71) under the driving of the welding strip clamping device supporting sliding table cylinder (10).
3. A welding process for a contact assembly lug of a circuit breaker according to claim 1 or 2, characterized in that the welding is carried out by means of the welding device, the welding method comprising:
step one, placing a contact support: starting a contact support moving and positioning device, enabling the positioning clamp (3) to clamp the contact support by a first driving cylinder, and then enabling the positioning clamp (3) to move the contact support (7) to be welded onto a contact support supporting seat (71) on the lower electrode (1) and positioning the contact support on a welding position;
placing the welding strip, namely placing the welding strip (4) on a welding strip supporting rail (41), enabling one end of the welding strip (4) to be arranged below a pressing block (5) and to be spaced from the pressing block (5) by a certain distance, reserving the welding strip (4) with the contact length in front of the pressing block (5), starting a pressing cylinder (6) to enable the pressing block (5) to press the welding strip (4), and enabling a second driving cylinder (61) to drive a welding strip clamping device (8) to move one end of the welding strip (4) to the surface of a contact support;
step three, reserving the length of a soldering lug, driving the upper electrode (1) to press down through a motor, separating the pressing block (5) from the soldering lug belt (4) when the upper electrode (1) presses the position to be welded of the soldering lug belt (4) and the contact support (7), and driving the soldering lug belt clamping device (8) to move backwards along the contact support seat (71) through a second driving cylinder (61), wherein the upper electrode (2) presses the position to be welded of the soldering lug belt (4) at the moment, so that the soldering lug belt (4) exposes the length of the soldering lug required by the second welding;
fourthly, welding the welding lug, wherein the welding lug belt clamping device (8) compresses the welding lug belt (4) again, the contact support moving and positioning device resets, the upper electrode and the lower electrode are electrified for welding according to preset welding parameters, the position of the welding lug to be welded on the welding lug belt is softened, and when the physical tensile strength of the welding lug belt is reduced to be smaller than the tensile force of the welding lug belt moving device (62), the welding lug belt (4) is pulled off, and the welding is completed;
the welding lug belt clamping device (8) is reset, the upper electrode (2) moves upwards for resetting, and the whole welding process is completed.
4. A process for welding a contact assembly lug of a circuit breaker as recited in claim 3 wherein: and the first step to the fourth step are circulated, so that the circular welding of the contact assembly is realized.
5. A process for welding a contact assembly lug of a circuit breaker as recited in claim 3 wherein: the method also comprises the following steps: the welding device comprises at least two contact support moving and positioning devices, when one group of circulation from the first step to the fourth step is completed, one contact support moving and positioning device transfers a new contact support to a welding position, and the other contact support moving and positioning device moves the contact support welded with the welding lug to the next station for contact welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311155880.5A CN117259940A (en) | 2023-09-07 | 2023-09-07 | Welding process for welding lug of circuit breaker contact assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311155880.5A CN117259940A (en) | 2023-09-07 | 2023-09-07 | Welding process for welding lug of circuit breaker contact assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117259940A true CN117259940A (en) | 2023-12-22 |
Family
ID=89209633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311155880.5A Pending CN117259940A (en) | 2023-09-07 | 2023-09-07 | Welding process for welding lug of circuit breaker contact assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117259940A (en) |
-
2023
- 2023-09-07 CN CN202311155880.5A patent/CN117259940A/en active Pending
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