CN116275431A - Moving contact assembly of circuit breaker, welding device and welding method thereof - Google Patents
Moving contact assembly of circuit breaker, welding device and welding method thereof Download PDFInfo
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- CN116275431A CN116275431A CN202211558943.7A CN202211558943A CN116275431A CN 116275431 A CN116275431 A CN 116275431A CN 202211558943 A CN202211558943 A CN 202211558943A CN 116275431 A CN116275431 A CN 116275431A
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- welding
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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
- B23K11/00—Resistance welding; Severing by resistance heating
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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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—Auxiliary equipment
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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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Switches (AREA)
Abstract
The utility model provides a circuit breaker moving contact subassembly, welding set and welding method thereof, including moving support and moving contact of moving support terminal surface, the moving support is copper alloy material, the moving contact is high strength silver alloy material, the welding face bottom of moving contact is equipped with a plurality of protruding muscle of arranging along the width, the welding face infiltration of moving contact is enough to fill silver volume and is used for product welding, need not any additional solder when this moving contact subassembly product welds, utilize the silver layer of contact welding face to accomplish the welding of product with copper alloy support through resistance spot welding technology, the welding seam area that moving contact and moving support combine does not have obvious gap, the moving contact has been embedded into the inside of support, both have the chemical action of silver-copper alloying like this, have the physics combination of great plastic deformation volume again, finally obtain the joint strength of higher quality.
Description
Technical Field
The invention relates to a moving contact assembly of a circuit breaker, a welding device and a welding method thereof, and belongs to the field of welding type electric contact assembly workpieces.
Background
The molded case circuit breaker can automatically cut off the current after the current exceeds the trip setting. Plastic housing refers to the use of plastic insulators as the housing of the device to isolate the conductors from each other and from the grounded metal parts. Molded case circuit breakers typically contain a thermo-magnetic trip unit, while large sized molded case circuit breakers are equipped with solid state trip sensors. The tripping unit is divided into: thermomagnetic trip and electronic trip. The current ratings commonly used are several 63, 80, 100, 125, 160, 200, 225, 250, 315, 350, 400, 500, 630A. The plastic shell circuit breaker has the functions of leakage, short circuit and overload delay protection. The molded case circuit breaker can not only switch on, bear and switch off the current of a normal loop, but also switch on the abnormal operation or overload condition of an electric appliance; if a short circuit fault occurs, the molded case circuit breaker receives a command to automatically open the switch, thereby playing a role in protecting the circuit. The plastic shell circuit breaker is provided with a leakage protection device with ultrahigh precision and sensitivity, so that the plastic shell circuit breaker has an ultra-strong leakage protection function.
The moving contact assembly is used as an electric contact part of the inner core of the molded case circuit breaker, the quality of the moving contact assembly determines the service life of the molded case circuit breaker switch to a great extent, so that the welding quality of the moving contact assembly is particularly important, and the high-frequency induction brazing or the resistance brazing process is mainly used when the moving contact assembly of the circuit breaker is welded by enterprises at home and abroad at present.
If the high-frequency induction brazing process is adopted, the welding time is longer, the welding heat affected zone is larger, so that the bracket is seriously annealed to greatly reduce the hardness of materials, and the end part of the actuating component bracket is greatly deformed due to larger contact impact force between the movable bracket and the fixed contact during the action of the movable bracket and the fixed contact in the subsequent use process of the molded case circuit breaker, so that the movable contact and the fixed contact are in poor contact or cannot be in contact, and the service performance of the product is finally affected.
If the traditional metal electrode resistance brazing process is adopted, silver-based solder is usually added to finish the welding of the support and the contact, four Zhou Huiyou obvious solders overflow after the movable contact welding to ensure the welding strength of the product, so that the welding shearing force of the movable assembly can reach 100N/mm generally 2 Above, for the molded case circuit breaker switch products with double breaking points, even if the moving contact assembly has good welding strength, the moving contact assembly can not meet the severe electrical life or breaking test requirements of ultra-large current (such as 36KA and 72 KA) and the like, and the problem that the moving contact assembly with double breaking points falls off contacts in the use of the molded case circuit breaker switch or in the electrical performance test process becomes a pain point problem which puzzles a plurality of piezoelectric device complete machine enterprises. How to solve the final use of the welding strength of the moving contact assembly and the molded case circuit breaker switch productThe matching relation of the performance is a key technical problem which needs to be solved by industry technicians.
The brazing process (resistance brazing or induction brazing) wets the welding surfaces of the contact and the bracket through melting of brazing filler metal, and finally forms a ternary alloy structure in the welding seam area of the contact and the bracket to realize welding of products, and the brazing process can meet the static performance of the products only by judging from strength indexes such as welding shearing force, metallography and the like of the products, but the problem that the movable contact falls off often occurs in the electrical performance or heavy current breaking test of the molded case circuit breaker. The morphology analysis of the contact and the welding line area of the support after the contact is separated can obtain that the solder runs off from the welding line area after reaching the melting point under the high temperature effect of the electric arc, the contact slowly floats on the welding surface of the support, and the serious failure problem of the separation of the movable contact finally occurs under the continuous effect of the high temperature of the electric arc.
Disclosure of Invention
The invention aims to overcome the defects and the shortcomings of the prior art and provides a moving contact assembly of a circuit breaker and a welding method thereof.
The utility model provides a circuit breaker moving contact subassembly, includes the moving support and moves the movable contact of support terminal surface, the moving support is copper alloy material, the movable contact is high strength silver alloy material, the welding face bottom of movable contact is equipped with a plurality of protruding muscle along width range, the movable contact welding face infiltration is enough to fill silver volume and is used for the product welding.
Preferably, the protruding ribs of the welding surface of the movable contact are semicircular or grid-shaped, and the number of the protruding ribs is at least two.
The utility model provides a welding set of circuit breaker moving contact subassembly, welding set is used for welding foretell moving contact subassembly, welding set includes upper electrode, moving support supporting seat and two bottom electrodes, moving support supporting seat be used for supporting moving support, be equipped with the support piece that is used for supporting moving support on the moving support supporting seat, the support piece terminal surface is the laminating design with moving support, the upper electrode compress tightly the moving contact in moving support.
Further, the device also comprises an assembly alignment device, the assembly alignment device comprises a positioning clamp, a positioning clamp opening and closing cylinder, a positioning clamp moving cylinder and a compression rod cylinder for driving the upper electrode to lift, a clamping cavity with a shape matched with that of the movable contact is formed when the positioning clamp is closed, the positioning clamp opening and closing cylinder drives the positioning clamp to open or close, and the positioning clamp moving cylinder drives the positioning clamp to move above the movable support and outside the movable support.
Further, the lower electrode is respectively provided with electrode holders for fixing the electrodes, and one of the electrode holders is provided with an electrode cylinder for driving the electrode holder to approach or depart from the other electrode holder.
Further, a supporting base is arranged below the moving contact supporting seat and used for fixing the moving support supporting seat.
The welding method for the moving contact assembly of the circuit breaker uses any welding device to weld the moving contact assembly, and no welding flux is needed to be added in the whole welding process of the product, and the welding method comprises the following steps:
(1) Placing the movable support, namely placing the movable support to be welded on a movable support supporting seat, and mutually sticking the movable support, the movable support supporting seat and fixed electrodes in the lower electrode group; the movable support is made of copper alloy;
(2) The movable contact is placed, the positioning clamp opening and closing cylinder and the positioning clamp moving cylinder are started, the width dimension between the positioning clamps is slightly larger than the width dimension of the movable contact, the gap between the positioning clamps and the movable contact is generally 0.3-0.5mm, and the contact is just fallen on the welding surface of the bracket; the movable contact is made of high-strength silver alloy materials, such as AgW, agWC and the like, the contact specification is designed into a required size according to a specific product current level, a welding surface of the movable contact is provided with a plurality of raised tooth shapes when the movable contact is designed, and the tooth shapes and the number of raised ribs of the welding surface of the movable contact can be adjusted according to the specification of the movable contact;
(3) Positioning the movable support and the contact, starting the positioning clamp opening and closing cylinder again, closing the positioning clamp, and clamping the movable contact and the support to enable the movable contact and the movable support to be positioned completely in the front-back left-right direction; then starting a compression bar cylinder to enable the upper electrode to vertically move downwards until the upper electrode is tightly attached to the movable contact, starting a positioning clamp opening and closing cylinder again, and separating the positioning clamp;
(4) After all the steps are finished, namely all preparation works before the welding are finished, starting a power supply of the resistance welding equipment, and electrifying and heating a workpiece under the set technological parameters such as welding current, welding time, welding pressure and the like to finish the welding of a single movable contact of a movable contact assembly;
(5) Discharging the product, starting a compression bar cylinder to enable the upper electrode to move upwards, starting an electrode cylinder to enable the lower electrode to move outwards, and taking away the semi-finished product from the support seat of the driven bracket;
(6) And (3) welding a finished product, repeating the steps (1) - (4), finally finishing the welding of the finished product of the double-breakpoint movable contact assembly, and then repeating the step (5) to remove the finished product. The steps are aimed at welding the double-breakpoint movable contact assembly, and if the steps (1) - (4) are completed for the single-breakpoint movable contact assembly, welding of finished products can be completed.
The beneficial effects of the invention are as follows: the bottom of the movable contact is arranged into a convex rib shape, the silver filling amount of a contact welding surface is increased, no solder is required to be additionally added when the movable contact component is welded, the product can be welded by utilizing a silver layer of the contact welding surface and a copper alloy movable support through a resistance spot welding process, a welding seam area where the movable contact is combined with the movable support is free from obvious gaps, and the movable contact is embedded into the movable support, so that the movable contact and the movable support have the chemical effect of silver-copper alloying and the physical combination of larger plastic deformation amount, and finally the joint strength with higher quality is obtained.
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 main body block diagram of a middle moving contact assembly of the present invention;
fig. 2 is a main body structure diagram of the movable contact in the present invention;
FIG. 3 is a main structure diagram of a welding device according to the present invention;
FIG. 4 is an enlarged view of the structure at C in FIG. 3;
FIG. 5 is a simplified diagram of the kinematic mount being positioned;
FIG. 6 is a main block diagram of an assembled alignment device of the present invention;
in the figure, 1, a movable bracket; 2. a movable contact; 21. convex ribs; 3. an upper electrode; 4. a movable support bracket; 41. a support; 42. a support end face; 5. a lower electrode; 6. assembling an alignment device; 61. a positioning clamp; 62. a positioning clamp moving cylinder; 63. a positioning clamp opening and closing cylinder; 7. a compression bar cylinder; 8. a clamping cavity; 9. an electrode base; 10. an electrode cylinder; 11. and a support base.
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.
As shown in fig. 1-6, an embodiment of a movable contact assembly of a circuit breaker according to the present invention includes a movable support 1 and a movable contact 2 on an end surface of the movable support 1, wherein the movable support 1 is made of a copper alloy material, the movable contact 2 is made of a high-strength silver alloy material (such as AgW, agWC, etc.), a plurality of ribs 21 arranged along a width are provided at a bottom of a welding surface of the movable contact 2, and a sufficient silver filling amount is infiltrated into the welding surface of the movable contact 2 for product welding. The bottom of the movable contact 2 is set to be in the shape of a convex rib 21, the silver filling amount of a contact welding surface is increased, no solder is required to be additionally added when the movable contact component is welded, the product can be welded by utilizing a silver layer of the contact welding surface and the copper alloy movable support 1 through a resistance spot welding process, no obvious gap exists in a welding seam area where the movable contact 2 is combined with the movable support 1, the movable contact 2 is embedded into the movable support 1, so that the two components have the chemical effect of silver-copper alloying and the physical combination of larger plastic deformation amount, and the joint strength with higher quality is finally obtained.
The utility model provides a welding set of circuit breaker moving contact subassembly, welding set is used for welding foretell moving contact subassembly, welding set includes upper electrode 3, moves movable support supporting seat 4 and two lower electrodes 5, and movable support supporting seat 4 is used for supporting movable support 1, is equipped with 1 support piece 41 that is used for supporting movable support on the movable support supporting seat 4, and support piece terminal surface 42 is the laminating design with movable support 1, and upper electrode 3 compresses tightly movable contact 2 in movable support 1. The electrode structure adopts traditional upper electrode 3, the electrically conductive mode of bottom electrode 5 vertical structure, designs into upper electrode 3 and bilateral symmetry structure and constitutes with two bottom electrodes 5 that move support 1 offset, realizes product resistance spot welding technology, during the welding, with moving support 1, moving contact 2 assembly in proper order, need not to add any solder and can accomplish the welding of moving contact subassembly, and the fuse-element all around of moving contact 2 spills over evenly after the product welds, and welding rate, metallography and intensity performance index such as shearing force are good, and product welding quality uniformity is good, and welding efficiency is high, can realize the stable production in batches of product.
The welding device further comprises an assembly alignment device 6, wherein the assembly alignment device 6 comprises a positioning clamp 61, a positioning clamp 61 opening and closing cylinder, a positioning clamp 61 moving cylinder and a pressing rod cylinder 7 for driving the upper electrode 3 to lift, when the positioning clamp 61 is closed, a clamping cavity 8 with the shape of the movable contact 2 being matched with that of the movable contact is formed, the positioning clamp 61 opening and closing cylinder drives the positioning clamp 61 to open or close, and the positioning clamp 61 moving cylinder drives the positioning clamp 61 to move above the movable support 1 and outside the movable support 1. The movable contact 2 is accurately placed on the movable support 1 by the aid of the arranged assembly alignment device 6, the movable contact 2 is pressed by the upper electrode 3 before the positioning clamp 61 is opened, and welding requirements of movable contact assemblies of different specifications can be met by the aid of the shape of the clamping cavity 8.
The lower electrodes 5 are respectively provided with electrode holders 9 for fixing electrodes, and one of the electrode holders 9 is provided with an electrode cylinder 10 for driving the electrode holder 9 to approach or separate from the other electrode holder 9. One lower electrode 5 serves as a stationary electrode, and the other lower electrode 5 serves as a movable electrode, so that the driving structure can be simplified. Sufficient assembly space of the movable support 1 can be provided before welding, and the movable support is convenient for manual or machine assembly to carry out rapid assembly. A supporting base 11 is arranged below the movable support supporting seat 4 and is used for fixing the movable support supporting seat 4.
The welding method for the moving contact assembly of the circuit breaker uses any welding device to weld the moving contact assembly, and the welding method comprises the following steps: for a molded case circuit breaker, a single-breakpoint product is 1 movable contact 2, and a double-end product is 2 movable contacts 2; the number of moving contacts 2 is 1 for a frame circuit breaker.
(1) Placing the movable support 1, placing the movable support 1 to be welded on the movable support supporting seat 4, and mutually attaching the movable support 1, the movable support supporting seat 4 and fixed electrodes in the lower electrode 5 group; the movable support 1 is made of copper alloy;
(2) The movable contact 2 is placed, the positioning clamp 61 is started to open and close the air cylinder and the positioning clamp 61 is started to move the air cylinder, the width dimension between the positioning clamps 61 is slightly larger than the width dimension of the movable contact 2, the gap between the two is generally 0.3-0.5mm, and the contact is just on the welding surface of the bracket; the movable contact 2 is made of high-strength silver alloy materials, such as AgW, agWC and the like, the contact specification is designed into a required size according to a specific product current level, a welding surface of the movable contact is provided with a plurality of raised tooth shapes when the contact is designed, and the tooth shape and the number of the raised ribs 21 of the welding surface of the contact can be adjusted according to the specification of the contact;
(3) Positioning the movable support 1 and the contact, starting the positioning clamp 61 again to open and close the cylinder, closing the positioning clamp 61, and clamping the movable contact 2 and the support to completely position the movable contact 2 and the movable support 1 in the front-back left-right direction; then starting a compression bar cylinder 7 to enable the upper electrode 3 to vertically move downwards until the upper electrode is tightly attached to the movable contact 2, starting the positioning clamp 61 again to open and close the cylinder, and separating the positioning clamp 61;
(4) After all the steps are finished, namely all preparation works before the welding are finished, starting a power supply of the resistance welding equipment, and electrifying and heating a workpiece under the set technological parameters such as welding current, welding time, welding pressure and the like to finish the welding of a single movable contact 2 of the movable contact assembly;
(5) Discharging the product, starting a compression bar cylinder 7 to enable the upper electrode 3 to move upwards, starting an electrode cylinder 10 to enable the lower electrode 5 to move outwards, and taking the semi-finished product from the driven bracket support seat 4;
(6) And (3) welding a finished product, repeating the steps (1) - (4), finally finishing the welding of the finished product of the double-breakpoint movable contact assembly, and then repeating the step (5) to remove the finished product. The steps are aimed at welding the double-breakpoint movable contact assembly, and if the steps (1) - (4) are completed for the single-breakpoint movable contact assembly, welding of finished products can be completed.
Through the technical scheme, the welding method related by the invention adopts a resistance spot welding process, high-quality welding with the movable support 1 can be realized without adding any solder, the melt on the periphery of the welded movable contact 2 is uniformly oozed, meanwhile, the contact is deeply embedded into the support, good physical and chemical combination is formed, the welding performance indexes of a contact assembly such as shearing force and metallography are good, meanwhile, various performance indexes of a circuit breaker switch product can be well met, the problem of the pain point of contact falling off in the using process of the movable contact assembly is solved, and the device and the method can be used for mass stable production, and have the advantages of convenient operation, low cost, high welding efficiency and good welding quality consistency. The products produced in batches by adopting the welding method provided by the invention are fully used and verified at the client, and can meet the harsh electrical life and performance requirements of high-current breaking test of high-end client high-current level breaker switch products.
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.
While the invention has been described with reference to several particular embodiments, it should be understood that the invention is not limited to the particular embodiments disclosed. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (7)
1. A circuit breaker moving contact assembly is characterized in that: the movable contact comprises a movable support and a movable contact on the end face of the movable support, wherein the movable support is made of copper alloy materials, the movable contact is made of high-strength silver alloy materials, a plurality of convex ribs arranged along the width are arranged at the bottom of a welding surface of the movable contact, and the welding surface of the movable contact is infiltrated with enough silver filling amount for product welding.
2. The circuit breaker moving contact assembly of claim 1, wherein: the convex ribs of the welding surface of the movable contact are semicircular or grid-shaped, and the number of the convex ribs is at least two.
3. The utility model provides a welding set of circuit breaker moving contact subassembly which characterized in that: the welding device is used for welding the movable contact assembly according to the claims 1-2, the welding device comprises an upper electrode, a movable support supporting seat and two lower electrodes, the movable support supporting seat is used for supporting a movable support, a supporting piece used for supporting the movable support is arranged on the movable support supporting seat, the end face of the supporting piece is in fit design with the movable support, and the upper electrode compresses the movable contact on the movable support.
4. A welding apparatus for a moving contact assembly of a circuit breaker as claimed in claim 3, wherein: the assembly alignment device comprises a positioning clamp, a positioning clamp opening and closing cylinder, a positioning clamp moving cylinder and a compression rod cylinder for driving the upper electrode to lift, wherein a clamping cavity with a shape matched with that of the movable contact is formed when the positioning clamp is closed, the positioning clamp opening and closing cylinder drives the positioning clamp to open or close, and the positioning clamp moving cylinder drives the positioning clamp to move above the movable support and outside the movable support.
5. A welding apparatus for a moving contact assembly of a circuit breaker as claimed in claim 3, wherein: the lower electrode is respectively provided with electrode holders for fixing electrodes, and one electrode holder is provided with an electrode cylinder for driving the electrode holder to approach or depart from the other electrode holder.
6. A welding apparatus for a moving contact assembly of a circuit breaker as claimed in claim 3, wherein: and a supporting base is arranged below the movable support supporting seat and used for fixing the movable support supporting seat.
7. A welding method of a moving contact assembly of a circuit breaker is characterized by comprising the following steps of: the movable contact assembly is welded by using the welding device of any one of the claims 3-6, no solder is added in the whole welding process of the product, and the welding method comprises the following steps:
(1) Placing the movable support, namely placing the movable support to be welded on a movable support supporting seat, and mutually sticking the movable support, the movable support supporting seat and fixed electrodes in the lower electrode group; the movable support is made of copper alloy;
(2) The movable contact is placed, the positioning clamp opening and closing cylinder and the positioning clamp moving cylinder are started, the width dimension between the positioning clamps is slightly larger than the width dimension of the movable contact, the gap between the positioning clamps and the movable contact is generally 0.3-0.5mm, and the contact is just fallen on the welding surface of the bracket; the movable contact is made of high-strength silver alloy materials, such as AgW, agWC and the like, the contact specification is designed into a required size according to a specific product current level, a welding surface of the movable contact is provided with a plurality of raised tooth shapes when the movable contact is designed, and the tooth shapes and the number of raised ribs of the welding surface of the movable contact can be adjusted according to the specification of the movable contact;
(3) Positioning the movable support and the contact, starting the positioning clamp opening and closing cylinder again, closing the positioning clamp, and clamping the movable contact and the support to enable the movable contact and the movable support to be positioned completely in the front-back left-right direction; then starting a compression bar cylinder to enable the upper electrode to vertically move downwards until the upper electrode is tightly attached to the movable contact, starting a positioning clamp opening and closing cylinder again, and separating the positioning clamp;
(4) After all the steps are finished, namely all preparation works before the welding are finished, starting a power supply of the resistance welding equipment, and electrifying and heating a workpiece under the set technological parameters such as welding current, welding time, welding pressure and the like to finish the welding of a single movable contact of a movable contact assembly;
(5) Discharging the product, starting a compression bar cylinder to enable the upper electrode to move upwards, starting an electrode cylinder to enable the lower electrode to move outwards, and taking away the semi-finished product from the support seat of the driven bracket;
(6) And (3) welding a finished product, repeating the steps (1) - (4), finally finishing the welding of the finished product of the double-breakpoint movable contact assembly, and then repeating the step (5) to remove the finished product. The steps are aimed at welding the double-breakpoint movable contact assembly, and if the steps (1) - (4) are completed for the single-breakpoint movable contact assembly, welding of finished products can be completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211558943.7A CN116275431A (en) | 2022-12-06 | 2022-12-06 | Moving contact assembly of circuit breaker, welding device and welding method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211558943.7A CN116275431A (en) | 2022-12-06 | 2022-12-06 | Moving contact assembly of circuit breaker, welding device and welding method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116275431A true CN116275431A (en) | 2023-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211558943.7A Pending CN116275431A (en) | 2022-12-06 | 2022-12-06 | Moving contact assembly of circuit breaker, welding device and welding method thereof |
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| CN (1) | CN116275431A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117840633A (en) * | 2023-12-05 | 2024-04-09 | 浙江正泰零部件有限公司 | Contact assembly and welding method and application thereof |
-
2022
- 2022-12-06 CN CN202211558943.7A patent/CN116275431A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117840633A (en) * | 2023-12-05 | 2024-04-09 | 浙江正泰零部件有限公司 | Contact assembly and welding method and application thereof |
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