CN115621806A - Resistor pin connection method - Google Patents
Resistor pin connection method Download PDFInfo
- Publication number
- CN115621806A CN115621806A CN202110795556.4A CN202110795556A CN115621806A CN 115621806 A CN115621806 A CN 115621806A CN 202110795556 A CN202110795556 A CN 202110795556A CN 115621806 A CN115621806 A CN 115621806A
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- China
- Prior art keywords
- pin
- pressing head
- cold pressing
- resistor
- protective sleeve
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/033—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wrapping or unwrapping wire connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/16—Resistor networks not otherwise provided for
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C13/00—Resistors not provided for elsewhere
- H01C13/02—Structural combinations of resistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
- H01R43/0235—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections for applying solder
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
- H01R43/048—Crimping apparatus or processes
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
Abstract
The invention relates to a resistor pin connection method, which is used for preprocessing a resistor pin; each two parallel resistors are twisted to form a connecting unit; the connecting ends of the two connecting units are sleeved with the cold pressing head and the protective sleeve, and the four pins are arranged together in parallel; the cold pressing head is sleeved outside the four pins for compression joint; spot welding the connecting end at the cold pressing head; and moving the protective sleeve to the outside of the cold pressing head for soldering. The invention adopts the technical scheme of the combined copper wire connection mode, fully exerts the advantages of the prior technical scheme, and achieves the reliable connection of the copper wire with the single-stranded pin of the resistor through scientific and close matching.
Description
Technical Field
The invention relates to the technical field of extra-high voltage direct current transmission, in particular to a resistor pin connection method.
Background
The direct current voltage transformer is used as an important device for metering electric energy, monitoring electric quantity and controlling and protecting an electric power system of an extra-high voltage direct current transmission system, is difficult to manufacture, mostly adopts foreign mature products, and has certain gap between the domestic manufacturing level and the world advanced level. At present, higher requirements are put on a direct current voltage transformer, the structural design is more compact, the overall weight is reduced, and a concentric resistance-capacitance voltage division structure is generally adopted for realization, for example, in a direct current resistance type voltage transformer disclosed in CN 107546019A, a resistance and a capacitance are concentrically installed to form a resistance-capacitance voltage division module, and are sequentially connected in series and fixed inside a hollow insulator.
The resistor which is one of the key components of the direct current voltage transformer plays a key role in a primary voltage division loop. The resistor is formed by connecting two non-inductive resistors in parallel into a group, and a plurality of groups of non-inductive resistors are spirally wound on an epoxy groove pipe after being connected in series, so that the reliability and stability of a product are directly influenced by the problems of large number of non-inductive resistors, difficult pin connection and the like in a single resistor product, and the problem of resistance pin connection is particularly urgent.
The resistance pin is red copper tin-plating material, and conventional connected mode has crimping and soldering and contravariant direct current formula spot welding: 1) During crimping, the resistor pin is arranged in a cold press head, and a special crimping tool is used for operation, so that the resistor pin is fixed; 2) The tin soldering refers to a new alloy layer formed on the surface of the resistor pins by the metal tin alloy which is melted into liquid at a certain temperature, so as to achieve the structural connection and the electrical conduction between the resistor pins; 3) The contravariant direct current type spot welding is a method of compressing a resistance pin between two columnar electrodes, heating the resistance pin to a melting or plastic state by using a resistance heat effect generated by current flowing through a contact surface of a copper wire of the resistance pin, and forming metal combination.
The cold pressing head crimping process is mainly applied to multi-core wire crimping, the tensile strength of a single-stranded thin copper wire of a resistor pin is low after the single-stranded thin copper wire is crimped, and the single-stranded thin copper wire is easy to loosen under stress.
The soldering process is convenient to operate, welding materials are not high in price, the soldering process is widely adopted in the power equipment industry, compared with compression welding, resistance pins need to be fixed before soldering, the difficulty is high, the operation time is long, the requirement on the skill level of workers is high, insufficient soldering or welding failure is easily caused in the welding process, meanwhile, the resistance in the text cannot bear the tensile force for a long time in the working state of soldering welding points, and therefore the process has a high risk when being applied to products of the type.
The inversion direct-current type spot welding process has the advantages of small heat affected zone, firm welding spot, relatively large contact area of the surface of a workpiece at the welding position, high welding efficiency and the like, is gradually popularized in the industrial field, the welding quality is affected by three aspects of welding current, welding time and electrode pressure, the metal at the connecting position is subjected to plastic deformation under the combined action of the electrode pressure, the welding current and the welding time, and the metal is easy to bend and break when stressed.
Disclosure of Invention
The invention provides a resistor pin connecting method, which aims at solving the problems that in the manufacturing process of a high-voltage resistor for a direct-current voltage transformer, after two non-inductive resistors are connected in parallel, a multi-stage series connection mode is unreliable by adopting a single copper wire connection mode, the surface contact area of a resistor pin to be connected is relatively small, and the processing efficiency is low.
In order to achieve the above object, the present invention provides a resistor pin connection method, including:
preprocessing a resistor pin;
each two parallel resistors are twisted to form a connecting unit; the cold pressing head and the protective sleeve are sleeved at the connecting ends of the two connecting units, and the four pins are arranged together in parallel;
the cold pressing head is sleeved outside the four pins for compression joint;
spot welding the connecting end at the cold pressing head;
and moving the protective sleeve outside the cold pressing head for soldering.
Further, the resistor pin is preprocessed, and the preprocessing comprises the following steps: and removing the oxide layer on the surface of the resistance pin, arranging a protection part at the root part, and keeping the wire outlet direction of the resistance pin.
Further, the protection part is an insulating support.
Furthermore, the cold pressing head and the protecting sleeve are made of tinned copper pipes; the cold pressing head is in clearance fit with four pins inside; the diameter of the protective sleeve is 1.5 mm-2.5 mm larger than that of the cold pressure head.
Further, the surface contact area of the pin to be connected is increased during the spot welding.
Further, the spot welding process parameters are as follows: welding current was 4200A, welding time 120CYC.
Furthermore, the tin is soldered to the end of the protective sleeve to be round and full without sharp corners and burrs.
Furthermore, the length of the protective sleeve is greater than that of the cold pressing head, and the length of the protective sleeve is 4-5 mm.
The technical scheme of the invention has the following beneficial technical effects:
(1) The invention adopts the technical scheme of a combined copper conductor connecting mode, and the structure comprises a resistor pin, a cold pressing head and a protective sleeve. The root parts of the resistor pins are provided with protective parts, and the double-twisting treatment is carried out at the same time, so that the two pins are in the same stress direction when the resistor string is subjected to tension, and the tensile strength is increased; the cold pressing head is used for fixing 4 resistance pins, so that the surface contact area of the resistance pins to be connected is increased, meanwhile, the cold pressing head enhances the structural reliability of a welding part, and convenience is provided for the operation of an inversion direct-current type spot welding process; the protective sleeve moves to the welding spot position, and is filled with soldering tin, and the protective sleeve tip is mellow, and no closed angle, burr improve welding spot position partial discharge electrical property.
(2) The existing copper wire connection mode of the invention is as follows: the cold-pressing head crimping process, the tin soldering process and the inversion direct-current type spot welding process can not completely meet the requirement of the high-voltage resistor on manufacturing reliability. The invention adopts the technical scheme of the combined pin connection mode, fully exerts the advantages of the prior technical scheme and achieves the reliable connection of the copper conductor with the single-stranded pin of the resistor through scientific and close matching.
Drawings
FIG. 1 is a schematic view of a cold press head and a sheath tube;
FIG. 2 is a schematic view of the cold press head after crimping;
FIG. 3 is a schematic view of the connection after spot welding;
FIG. 4 is a schematic view after welding;
fig. 5 is a connection flow chart.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The invention provides a resistor pin connection method, which is suitable for connection among resistor pins in the manufacturing process of an ultra-high voltage transmission resistor string, and the specific operation steps are as follows in combination with a figure 5:
(1) And preprocessing the resistor pins.
The resistance pin is the copper wire, and the line footpath is about 0.3mm, and the connection degree of difficulty between the resistance is great. Firstly, preprocessing is carried out, an oxide layer on the surface of a resistor pin is removed, a protection part is arranged at the root of the resistor pin, and the wire outlet direction is kept. The protective part is, for example, an insulating support.
(2) Every two parallel resistors are twisted to form a connecting unit, the connecting ends of the two connecting units are arranged together in parallel and sleeved with the cold pressing head and the protective sleeve.
When guaranteeing that the resistance cluster receives the pulling force, two pin atress directions are the same, and increase tensile strength carries out two hank treatments, reserves the position of cold pressure head, protecting pipe, and the material of cold pressure head, protecting pipe is tinned tube, and the protecting pipe internal diameter should be greater than the cold pressure head external diameter.
The four wires of the two connecting units are sleeved into the protective sleeve and the cold pressing head, then the four wires are arranged together in parallel, and the cold pressing head moves to the parallel position.
The diameter of the cold pressing head is required to meet the requirement that the four wires form a combined body which can be smoothly inserted into the cold pressing head.
(3) The cold pressing head sleeve is arranged at the connecting end for crimping and fixing the resistor pin.
Adopt the head crimping technology of colding pressing, install 4 resistance pins in the cold pressure head during the crimping, use special crimping instrument to operate, combine fig. 2, realize two liang of contacts of resistance pin and reliably fixed after colding pressing, the subsequent handling operation of being convenient for.
(4) Spot welding reinforcement of the resistance pin is realized, and the spot welding technological parameters are as follows: welding current 4200A, welding time 120CYC.
The inversion direct-current spot welding process is adopted, spot welding is carried out outside the cold pressing head, the contact area of the surface of the pin of the resistance to be connected is increased under the combined action of electrode pressure, welding current and welding time on the copper wire at the contact position of the pin, the connecting structure shown in the figure 3 is formed, and meanwhile, the cold pressing head enhances the structural reliability of the welding position.
(5) And moving the protective sleeve to the outside of the cold pressing head for soldering.
And moving the protective sleeve to the welding spot position, and ensuring that the protective sleeve is filled with soldering tin by adopting a soldering process. The end part of the protective sleeve is round and full, and has no sharp corner or burr, and the partial discharge electrical performance of the welding spot position is improved.
The inner diameter of the protective sleeve is about 2mm larger than the outer diameter of the cold pressing head so as to ensure that soldering tin can enter the protective sleeve.
Further, the length of the sheath tube is slightly greater than the length of the cold pressure head to ensure that the cold pressure head can be completely covered. In one embodiment, the length of the protective sleeve is 4 mm-5 mm, and the soldering tin flows in from one end of the protective sleeve and flows out from the other end of the protective sleeve after being melted during soldering.
The invention relates to a resistor pin connection method, which is used for preprocessing a resistor pin; each two parallel resistors are twisted to form a connecting unit; the cold pressing head and the protective sleeve are sleeved at the connecting ends of the two connecting units, and the four pins are arranged together in parallel; the cold pressing head is sleeved outside the four pins for compression joint; spot welding the connecting end at the cold pressing head; and moving the protective sleeve outside the cold pressing head for soldering. The invention adopts the technical scheme of a combined copper conductor connecting mode, fully exerts the advantages of the prior technical scheme, and achieves the reliable connection of the copper conductor with the single-stranded pin of the resistor through scientific and close matching.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundary of the appended claims, or the equivalents of such scope and boundary.
Claims (8)
1. A method of resistive pin connection, comprising:
preprocessing a resistor pin;
each two parallel resistors are twisted to form a connecting unit; the cold pressing head and the protective sleeve are sleeved at the connecting ends of the two connecting units, and the four pins are arranged together in parallel;
the cold pressing head is sleeved outside the four pins for compression joint;
spot welding the connecting end at the cold pressing head;
and moving the protective sleeve outside the cold pressing head for soldering.
2. The resistive pin connection method of claim 1, wherein pre-processing the resistive pin comprises: and removing an oxide layer on the surface of the resistor pin, and arranging a protection part at the root part to keep the wire outlet direction of the resistor pin.
3. The method of claim 2, wherein the protective component is an insulating support.
4. The resistance pin connecting method according to claim 1 or 2, wherein the cold pressing head and the sheath tube are made of tinned copper tubes; the cold pressing head is in clearance fit with the four pins inside; the diameter of the protective sleeve is 1.5-2.5 mm larger than that of the cold pressure head.
5. The resistance pin connection method according to claim 1 or 2, wherein the surface contact area of the pin to be connected is increased during the spot welding.
6. The resistance pin connection method according to claim 1 or 2, wherein the spot welding process parameters are: welding current was 4200A, welding time 120CYC.
7. The resistance pin connecting method according to claim 1 or 2, wherein the ends of the sheath tubes soldered thereto are rounded and full, and have no sharp corners and no burrs.
8. The resistance pin connecting method according to claim 1 or 2, wherein the length of the sheath tube is greater than that of the cold press head, and the length of the sheath tube is 4mm to 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110795556.4A CN115621806A (en) | 2021-07-14 | 2021-07-14 | Resistor pin connection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110795556.4A CN115621806A (en) | 2021-07-14 | 2021-07-14 | Resistor pin connection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115621806A true CN115621806A (en) | 2023-01-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110795556.4A Pending CN115621806A (en) | 2021-07-14 | 2021-07-14 | Resistor pin connection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115621806A (en) |
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2021
- 2021-07-14 CN CN202110795556.4A patent/CN115621806A/en active Pending
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| TA01 | Transfer of patent application right |
Effective date of registration: 20230821 Address after: No. 1298 Xuchang City, Henan province 461000 XJ Avenue Applicant after: XJ Group Corp. Applicant after: XJ ELECTRIC Co.,Ltd. Address before: No. 1298 Xuchang City, Henan province 461000 XJ Avenue Applicant before: XJ Group Corp. |
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| TA01 | Transfer of patent application right |