CN113936886A - 1553B bus isolation transformer packaging structure and method - Google Patents
1553B bus isolation transformer packaging structure and method Download PDFInfo
- Publication number
- CN113936886A CN113936886A CN202111267124.2A CN202111267124A CN113936886A CN 113936886 A CN113936886 A CN 113936886A CN 202111267124 A CN202111267124 A CN 202111267124A CN 113936886 A CN113936886 A CN 113936886A
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- base
- upper cover
- transformer
- isolation transformer
- bus isolation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/022—Encapsulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/005—Impregnating or encapsulating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/10—Connecting leads to windings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
- H01F2027/065—Mounting on printed circuit boards
Abstract
The invention discloses a 1553B bus isolation transformer packaging structure and a method, which comprises the following steps: an upper cover and a base; the base is provided with a plurality of glue injection holes, and a plurality of guide pins are arranged on two sides of the base in an inserting manner; the inside chamber that holds that is used for placing transformer coil that is equipped with of upper cover, upper cover and base pass through fixed part and connect. The problem of 1553B bus isolation transformer encapsulation operation difficult, difficult clearance is solved, encapsulation efficiency and product percent of pass are improved.
Description
Technical Field
The invention belongs to the technical field of manufacturing and application of electric element products, and relates to a 1553B bus isolation transformer packaging structure and a method.
Background
With the rapid development of the aviation and aerospace electronics industries, the isolation transformer used in the 1553B high-speed bus controller is in greater and greater demand. A schematic diagram of a 1553B high-speed bus isolation transformer packaging shell is shown in fig. 1. The isolation transformer packaging shell is a pentahedral cavity without a sealing cover, and a circular concave area is arranged in the center of the interior of the cavity and used for placing a 1553B bus isolation transformer coil. Inside the packaging shell, 8 leading pins are pre-buried, the two sides are placed in parallel, 3 on one side and 5 on one side, and the leading pins are used for electrically conducting the transformer coil and the packaging shell.
However, the prior art package has the following problems during the packaging process: (1) the tin coating operation is difficult and the efficiency is low. The lead needle in the packaging shell can be enameled with tin with the height of only 3mm, the enameled tin can not exceed the packaging shell body, the operation space is narrow, only the electric iron can be used for manually enameled with tin, a tin pot can not be used for enameled with tin, and the efficiency is low. The plastic body of the transformer packaging shell is arranged outside the lead pin at the tin-coating position, and the packaging shell is easily scalded and unqualified products are caused because a soldering iron easily touches the plastic body in the tin-coating process. (2) The difficulty of the wire-wrapping operation is high, and the efficiency is low. The lead wire in the packaging shell has the winding welding height of only 3mm, the winding welding cannot exceed the packaging shell body, the operation space is narrow, and the efficiency is low; the plastic body of the transformer packaging shell is arranged on the outer side of the lead pin at the welding position, and the soldering iron easily touches the plastic body in the welding process to cause scalding of the packaging shell. (3) The excess materials can easily enter the packaging shell and are not easy to clean. The existing packaging shell is a five-surface cavity, and in the processes of girdling, testing and encapsulating, excess materials enter the cavity, particularly the bottom of a coil, and are difficult to clean, so that the short circuit of a transformer winding is easily caused. (4) The encapsulating operation difficulty is large, and the encapsulating percent of pass is low. The conventional packaging shell is a five-sided cavity without a sealing cover, a coil is not fixed in the packaging shell, when glue is injected and encapsulated, the coil easily exceeds the outer edge of the packaging shell under the buoyancy action of the pouring sealant to cause the problem of encapsulation superelevation, and the pouring sealant easily stains non-encapsulation and welding areas of a guide pin under the capillary action to cause reworking or unqualified products.
Therefore, when the 1553B bus isolation transformer is packaged by using the prior art, the packaging operation difficulty is high, the cleaning is not easy, and unqualified products are easy to cause.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a 1553B bus isolation transformer packaging structure and a method, which solve the problems that the 1553B bus isolation transformer is difficult to package and clean and improve the packaging efficiency and the product percent of pass.
The invention is realized by the following technical scheme:
a 1553B bus isolation transformer packaging structure, comprising: an upper cover 1 and a base 2; the base 2 is provided with a plurality of glue injection holes 4, and a plurality of guide pins 5 are inserted into two sides of the base 2; the upper cover is internally provided with an accommodating cavity for accommodating a transformer coil 9, and the upper cover 1 is connected with the base 2 through a fixing part.
Preferably, the fixing part comprises a positioning protrusion 6 arranged on the upper cover 1 and a positioning groove 7 arranged on the base 2, and the base 2 and the upper cover 1 are connected in a matching way through the positioning groove 7 and the positioning protrusion 6.
Preferably, the base 2 is further provided with a positioning column 3 for positioning the transformer coil 9.
Preferably, the outer edge of the base 2 is symmetrically provided with height limiting platforms 8, and the height limiting platforms 8 are arranged at the outer sides of the glue injection holes 4.
Preferably, the edges of the cover 1 and the base 2 are provided with alignment marks.
Preferably, the bottom of the receiving cavity is provided with a circular groove for fixing the transformer coil 9.
Preferably, several needles 5 are arranged in parallel.
Preferably, the lead needle 5 is made of an alloy material, and the surface of the lead needle 5 is plated with a conductive metal layer.
Preferably, the base 2 and the upper cover 1 are both formed by processing thermoplastic resin materials.
A1553B bus isolation transformer packaging method specifically comprises the following steps:
step 1, carrying out tin-soaking on a welding area of a lead pin 5, and placing a transformer coil on a base;
and 3, performing electrical test on the structure assembled in the step 2, and after various test requirements are met, pouring glue through the glue injection holes 4 for curing, and completing packaging.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the 1553B bus isolation transformer packaging structure and method provided by the invention, the transformer packaging shell is designed into the upper cover and the base which are detachably combined, so that the region of a lead pin of the packaging shell for tin coating and wire-wrap welding is exposed, the periphery is not shielded, the tin coating and wire-wrap welding operation is simple, the efficiency is high, the tin coating treatment can be directly carried out in a tin pot, and the probability that the shell is scalded by an iron in the wire-wrap welding process is greatly reduced. In addition, the glue injection hole is formed in the base of the packaging shell, so that the residues such as splashed soldering tin and residual enameled wires are not easy to hide in the processes of tin coating and wire wrapping, the cleaning is convenient, and the residues in the transformer can be greatly reduced.
Furthermore, a positioning column is arranged on the base of the packaging shell, a circular groove is formed in the bottom of the upper cover and used for fixing the transformer coil, and the circular groove is combined with the positioning column, so that the transformer coil is fixed more stably. After the packaging shells are combined, the transformer coil is fixed in the transformer shell, pouring sealant is injected through the designed potting hole, the problem of ultrahigh potting caused by the fact that the transformer coil floats in the potting sealant is solved, and the rate of unqualified products is reduced.
Furthermore, height limiting platforms are arranged on two sides of the base, so that the finished transformer can be supported when being welded on a printed board, and non-airtight installation is guaranteed.
Furthermore, the encapsulation shell base isolates the non-encapsulation area and the encapsulation area of the guide pin, and the problem that the encapsulation glue pollutes the guide pin outside the transformer shell is solved.
Drawings
FIG. 1 is a prior art transformer package;
FIG. 2 is an assembled perspective view of the transformer package of the present invention;
FIG. 3 is an exploded perspective view of the transformer package of the present invention;
FIG. 4 is a perspective view of the transformer base of the present invention;
FIG. 5(a) is a top view of the upper cover of the transformer of the present invention;
fig. 5(b) is a sectional view of the upper cover of the transformer of the present invention;
FIG. 6 is a top view of the glue injection hole of the transformer of the present invention;
in the figure: the transformer coil comprises an upper cover 1, a base 2, a positioning column 3, a glue injection hole 4, a guide pin 5, a positioning salient point 6, a positioning groove 7, a height limiting table 8 and a transformer coil 9.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The 1553B bus is an MIL-STD-1553 bus for short, the MIL-STD-1553B bus is a standard bus of the networking of American air force electronic subsystems and is a central weight-collecting serial bus, the bus adopts an instruction response mode to realize system communication, and redundant channels, odd check and corresponding error processing are adopted to improve the reliability of the system communication. Because the 1553B bus has extremely high reliability, the 1553B bus is widely applied to electronic products in the fields of aviation, aerospace, military and the like, and the demand of isolation transformers used in a 1553B bus controller is increasing.
The invention discloses a 1553B bus isolation transformer packaging structure which comprises an upper cover 1, a base 2, a positioning column 3, a glue injection hole 4, a lead needle 5, a positioning bulge 6, a positioning groove 7, a height limiting table 8 and a transformer coil 9, wherein the upper cover is provided with a plurality of through holes;
the transformer packaging shell consists of an upper cover 1 and a base 2, a plurality of glue injection holes 4 are formed in the base 2, and guide pins 5 are arranged on two sides of the base 2; an accommodating cavity is formed inside the upper cover 1, and the upper cover 1 and the base 2 are respectively provided with a fixing part. The fixing part comprises a positioning bulge 6 and a positioning groove 7, the positioning bulge 6 and the positioning groove 7 are respectively arranged on the inner side of the base 2 and the outer side of the upper cover 1, and the positioning bulge 6 and the positioning groove 7 are matched to fixedly connect the base body 2 and the upper cover 1.
The upper cover 1 and the base 2 are respectively formed by hot-pressing and injection molding of a thermoplastic resin material, such as one or a mixture of epoxy resin, phenolic resin, polyethylene resin, polypropylene resin, polymethyl methacrylate resin, polybutylene succinate resin and the like, through a mold.
Further, the outer edge of the base 2 is symmetrically provided with limited height platforms 8 which are arranged on the outer side of the glue injection hole 4. And the transformer for finished products is supported by the height limiting table 8 when being welded on the printed board so as to ensure non-airtight installation.
As shown in fig. 3, which is an exploded perspective view of the transformer package, the pins 5 are disposed in parallel on two sides of the base 2, preferably, 5 pins are disposed on one side of the two sides of the base, and 3 pins are disposed on the other side of the two sides of the base. Further, the lead pin 5 is made of an alloy material, and a conductive metal layer is plated on the surface thereof. Preferably, the lead 5 is injection molded into the base 2, the lead is machined from a tin bronze alloy material, and then plated with metallic nickel and gold.
As shown in fig. 4, which is a perspective view of a transformer base, a positioning column 3 is disposed at a central position of the base 2, and is matched with an inner diameter of a transformer coil 9 to fix the transformer coil 9;
as shown in fig. 5, which is a top view and a cross-sectional view of the transformer upper cover, a circular groove is formed at the bottom of the upper cover 1, and is matched with the transformer coil 9 for fixing the transformer coil 9, and is combined with the positioning column 3, so that the transformer coil 9 is more stably fixed.
As shown in fig. 6, which is a top view of the transformer glue injection hole, two sides of the positioning column 3 are respectively provided with 2 glue injection holes for injecting a pouring sealant into the package casing during packaging.
Furthermore, the corresponding corners of the upper cover 1 and the base 2 are respectively provided with a chamfer angle for designing a bevel edge mark of '1 foot', so that the upper cover 1 and the base 2 can be accurately coordinated conveniently.
The 1553B bus isolation transformer packaging process mainly comprises the following steps: wind welding (hereinafter referred to as "wire-wrap welding") → test → potting. And (3) a wire-wrapping welding procedure: and placing the transformer coil in a circular concave area inside the packaging shell, and then welding the coil lead-out wire on a lead pin inside the packaging shell in a winding manner. And (3) a testing procedure: and (3) carrying out electrical performance test on the 1553B bus isolation transformer subjected to the coil welding, wherein the test requirements of the 1553B bus isolation transformer are met. And (3) encapsulating: and pouring the pouring sealant into the transformer packaging shell which is qualified in the test, and completing the packaging of the transformer after the sizing material is solidified.
A1553B bus isolation transformer packaging method comprises the following steps:
step 1, carrying out tin-soaking on a welding area of a lead pin 5, and placing a transformer coil on a base;
and 3, performing electrical test on the structure assembled in the step 2, and after various test requirements are met, pouring glue through the glue injection holes 4 for curing, and completing packaging.
Preferably, for transformer packaging, the specific packaging process steps are as follows:
as shown in fig. 2, firstly, the base 2 is inverted, the part of the inner part of the lead needle 5 on the base 2, which is subjected to the wire-wrap welding region, is directly placed in a tin-coating pot for tin-coating treatment, then a hole in the middle of a 1553B bus isolation transformer coil to be wire-wrapped is directly inserted into a positioning column 3 in the center position of the base 2, a transformer coil 9 and the base 2 are flatly placed, each winding of the coil is wound on each lead needle 5 according to the technical requirements, and then the winding position is welded by using an electric soldering iron, so that the tin-coating treatment can be directly carried out in the tin pot, the tin-coating and wire-wrap welding operation process is simple and efficient, the produced residual excess is greatly reduced in the tin-coating and wire-wrap welding processes, the cleaning is easy, the lead needle welding region of the packaging shell is exposed, and the packaging shell is not easy to scald.
After welding is finished, checking and confirming that each winding of a 1553B isolation transformer coil is welded to a packaging shell lead pin correctly and a welding spot is qualified, assembling the upper cover 1 and the base 2, firstly, matching and stabilizing the groove of the upper cover 1 with the transformer coil 9, then, according to the '1 pin' bevel edge mark of the upper cover 1 and the '1 pin' bevel edge mark of the base 2, mutually matching the positioning bulge 6 on the outer side of the base and the positioning groove 7 on the inner side of the upper cover, and ensuring that the upper cover 1 and the base 2 are accurately assembled in place.
And secondly, performing an electrical performance test on the assembled 1553B bus isolation transformer to meet various test requirements of the 1553B bus isolation transformer. And finally, pouring the pouring sealant into the transformer packaging shell through the sealant pouring hole 4 on the base 2, wherein the height of the pouring sealant is flush with the outer surface of the base 2, and after the pouring sealant is cured, the 1553B bus isolation transformer packaging is completed. Therefore, the transformer coil is not overhigh in the filling and sealing process, the external guide needle of the transformer shell is not polluted, and the product percent of pass is improved.
Claims (10)
1. A1553B bus isolation transformer packaging structure is characterized by comprising: an upper cover (1) and a base (2); the base (2) is provided with a plurality of glue injection holes (4), and a plurality of guide pins (5) are inserted into two sides of the base (2); the transformer coil fixing device is characterized in that an accommodating cavity for accommodating a transformer coil (9) is formed in the upper cover, and the upper cover (1) is connected with the base (2) through a fixing part.
2. The packaging structure of a 1553B bus isolation transformer, according to the claim 1, characterized in that the fixing component comprises a positioning protrusion (6) arranged on the upper cover (1) and a positioning groove (7) arranged on the base (2), and the base (2) and the upper cover (1) are connected in a matching way through the positioning groove (7) and the positioning protrusion (6).
3. The packaging structure of a 1553B bus isolation transformer as claimed in claim 1, wherein the base (2) is further provided with a positioning column (3) for positioning the transformer coil (9).
4. The packaging structure of a 1553B bus isolation transformer according to claim 1, wherein the outer edge of the base (2) is symmetrically provided with height limiting platforms (8), and the height limiting platforms (8) are arranged outside the glue injection holes (4).
5. The packaging structure of a 1553B bus isolation transformer according to claim 1, wherein the edges of the upper cover (1) and the base (2) are provided with alignment marks.
6. The packaging structure of a 1553B bus isolation transformer as claimed in claim 1, wherein the bottom of the accommodating cavity is provided with a circular groove for fixing a transformer coil (9).
7. A 1553B bus isolation transformer packaging structure according to claim 1, characterized in that the pins (5) are arranged in parallel.
8. The packaging structure of a 1553B bus isolation transformer as claimed in claim 1, wherein the lead pins (5) are made of alloy material, and the surfaces of the lead pins (5) are plated with conductive metal layers.
9. The packaging structure of a 1553B bus isolation transformer according to claim 1, wherein the base (2) and the upper cover (1) are both formed by processing thermoplastic resin materials.
10. A packaging method of a 1553B bus isolation transformer, which is based on the packaging structure of any one of claims 1-9, is characterized by comprising the following steps,
step 1, carrying out tin-soaking on a welding area of a lead pin (5), and placing a transformer coil on a base;
step 2, winding each winding of the transformer coil (9) on each guide pin (5) according to the technical requirements, and welding; after the welding is finished, assembling the upper cover (1) and the base (2);
and 3, performing electrical test on the structure assembled in the step 2, and after various test requirements are met, pouring glue through the glue injection holes (4) for curing, and completing packaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111267124.2A CN113936886B (en) | 2021-10-28 | 2021-10-28 | 1553B bus isolation transformer packaging structure and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111267124.2A CN113936886B (en) | 2021-10-28 | 2021-10-28 | 1553B bus isolation transformer packaging structure and method |
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| CN113936886A true CN113936886A (en) | 2022-01-14 |
| CN113936886B CN113936886B (en) | 2023-06-06 |
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