JPS5953683B2 - Manufacturing method of electromagnetic core - Google Patents
Manufacturing method of electromagnetic coreInfo
- Publication number
- JPS5953683B2 JPS5953683B2 JP54171878A JP17187879A JPS5953683B2 JP S5953683 B2 JPS5953683 B2 JP S5953683B2 JP 54171878 A JP54171878 A JP 54171878A JP 17187879 A JP17187879 A JP 17187879A JP S5953683 B2 JPS5953683 B2 JP S5953683B2
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic
- electromagnetic core
- core
- manufacturing
- annealing
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
- B21C1/003—Drawing materials of special alloys so far as the composition of the alloy requires or permits special drawing methods or sequences
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/143—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of wires
-
- 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
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Electromagnetism (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
Description
【発明の詳細な説明】
本発明は、たとえば電磁リレー、電磁開閉器等に用いら
れる固定電磁鉄心の製作方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a fixed electromagnetic core used for example in electromagnetic relays, electromagnetic switches, etc.
電磁リレーは、固定電磁鉄心と可動接極子とからなり、
巻線が励磁されると相互に接触することにより継電され
るような構造を有する。代表的な電磁鉄心の例を第１図
及び第２図に示す。このような固定電磁鉄心を製作する
素材として、従来から、その固定電磁鉄心に要求される
特性に応じて、いわゆる電磁鉄心オオ（ＳＵＹＢ）ない
しは低炭素鋼材が使用されてきた。実用的磁気特性を維
持するためには、素材は、一般的に炭素含有量が０．０
０５重量％以下、Ｍｎが５重量％以下、Ｓが０．０３重
量％以下で冫あることが経験的に知られている。このよ
うな低炭素の軟鉄材の代表である電磁鉄心材ＳＵＹＢは
、鉄の他に約０．００５重量％程度の炭素、そして約０
．４３重量％程度のけい素、マンガン、りん、硫黄など
の不純物を含有する。従来、電磁鉄心は、一般に、熱間
圧延された前述の素材をその素線径から所定の径への伸
線工程、焼鈍工程、次いで鉄心の頭部及びボス部を形成
するための圧造工程、さらに磁気特性を維持するための
磁気焼鈍工程、そして最後に表面処理工程（例えば銅メ
ッキ、ニッケルメッキ）を経て製作されている。An electromagnetic relay consists of a fixed electromagnetic core and a movable armature.
It has a structure in which when the windings are energized, they contact each other to relay electricity. Examples of typical electromagnetic cores are shown in Figures 1 and 2. As a material for manufacturing such a fixed electromagnetic core, so-called electromagnetic iron core SUYB or low carbon steel has conventionally been used depending on the characteristics required of the fixed electromagnetic core. To maintain practical magnetic properties, the material generally has a carbon content of 0.0
It is empirically known that the content of Mn is 5% by weight or less, and the content of S is 0.03% by weight or less. Electromagnetic iron core material SUYB, which is a typical low carbon soft iron material, contains about 0.005% by weight of carbon in addition to iron, and about 0.00% by weight of carbon.
．． Contains about 43% by weight of impurities such as silicon, manganese, phosphorus, and sulfur. Conventionally, electromagnetic cores have generally been produced through a wire drawing process of the hot-rolled material described above from its strand diameter to a predetermined diameter, an annealing process, and then a forging process to form the head and boss part of the core. Furthermore, it is manufactured through a magnetic annealing process to maintain magnetic properties, and finally a surface treatment process (for example, copper plating, nickel plating).
特に、低炭素の電磁軟鉄材を用いた場合には、実用的磁
気特性を維持するためには５回又はそれ以上の焼鈍工程
を繰り返さなければならず、した’がつて電磁鉄心コス
トが高くなる欠点がある。In particular, when low-carbon electromagnetic soft iron material is used, the annealing process must be repeated five or more times to maintain practical magnetic properties, which increases the cost of the electromagnetic core. There are drawbacks.
このような磁気焼鈍工程を省くためには、冷間引抜時の
焼鈍処理において歪の除去が必要となる。しかしながら
、この歪除去は、電磁特性の低下の他に、フェライト結
晶粒の粗大化を招き、これが圧造性の低下とメッキ性の
低下に結びつくために歪除去工程の実施は困難である。
他方、低炭素鋼材は、低コスト材であり、且つ冷間伸線
工程を短縮するものであるが、しかし磁気特性を維持す
るためには焼鈍工程での脱炭処理フが必要となる。In order to omit such a magnetic annealing step, it is necessary to remove strain in the annealing treatment during cold drawing. However, this strain removal not only deteriorates the electromagnetic properties but also causes coarsening of ferrite crystal grains, which leads to a decrease in forging performance and a decrease in plating performance, making it difficult to implement the strain removal process.
On the other hand, low-carbon steel is a low-cost material and shortens the cold drawing process, but requires decarburization in the annealing process to maintain magnetic properties.
したがつて、本発明の目的は、前記のような欠点を改善
する電磁鉄心の改良製作方法を提供することである。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an improved method for manufacturing an electromagnetic core that overcomes the above-mentioned drawbacks.
他の目的は、新規な素材の使用により製造コス５ 卜が
大幅に軽減される電磁鉄心材の改良製作方法を提供する
ことである。Another object is to provide an improved method of manufacturing electromagnetic core materials in which manufacturing costs are significantly reduced by the use of new materials.
ここに、電磁鉄心を製作するにあたり、電磁鉄心材又は
低炭素鋼材に代えて、これよりも炭素含有量が多く （
０．０１重量％程度またはそれ以下）且つ不純物が少な
い（０．３１重量％以下）低コスト材の極軟鋼を用いる
ことにより、伸線工程の大幅短縮と焼鈍工程（磁気焼鈍
）の省略が可能となり、したがつて製造コストの大幅な
改善がはかれることが見出された。Here, in manufacturing the electromagnetic core, instead of electromagnetic iron core material or low carbon steel material, a material with a higher carbon content (
By using ultra-soft steel, a low-cost material with low impurities (about 0.01% by weight or less) and low impurities (0.31% by weight or less), it is possible to significantly shorten the wire drawing process and omit the annealing process (magnetic annealing). Therefore, it has been found that manufacturing costs can be significantly improved.
また、このような極軟鋼を素材にし、所定の操作工程を
行なうことにより、従来の電磁軟鉄材から製作された電
磁鉄心に優るとも劣らない磁気特性を有する電磁鉄心が
製作できることが見出された。本発明の電磁鉄心の製作
方法は、極軟鋼素材を所定の加工度で冷間伸線し、この
伸線を焼鈍処理に付し、焼鈍された伸線を所定の加工度
で仕上伸線してなるものであり、この仕上伸線（電磁鉄
心）を所望の形状に圧造し、そして必要ならば表面処理
することによつて所望の形状の電磁鉄心に成形される。It has also been discovered that by using such extremely mild steel as a material and carrying out the prescribed operating process, it is possible to produce an electromagnetic core that has magnetic properties that are comparable to those made from conventional electromagnetic soft iron materials. . The manufacturing method of the electromagnetic core of the present invention involves cold drawing an extremely mild steel material at a predetermined working degree, subjecting the drawn wire to an annealing treatment, and finishing drawing the annealed wire at a predetermined working degree. This finished wire drawing (electromagnetic core) is forged into a desired shape, and if necessary, surface treatment is performed to form the electromagnetic core in the desired shape.
本発明の製作方法に用いられる素材は、炭素含有量が０
．０１重量％程度又はそれ以下であり、そして炭素を除
く不純物含有量が０．３１重量％程度又はそれ以下であ
る極軟鋼である。The material used in the manufacturing method of the present invention has a carbon content of 0.
．． The content of impurities other than carbon is about 0.31% by weight or less.
これは、熱間線引された素線であるのが好ましい。本発
明の方法における冷間伸線工程は、熱間線引された極軟
鋼素線を２０％以上、好ましくは４０％，以上の加工度
で冷間伸線することによつて達成される。Preferably, this is a hot drawn wire. The cold wire drawing step in the method of the present invention is achieved by cold drawing the hot drawn extremely mild steel wire at a working ratio of 20% or more, preferably 40% or more.
この冷間伸線は、その後の工程における加熱処理条件に
より影響を受けない均一なフエライト粒度を得るのに必
須な条件である。冷間伸線された伸線は、次いで焼鈍処
理に付さ５れる。This cold wire drawing is an essential condition to obtain a uniform ferrite grain size that is not affected by the heat treatment conditions in the subsequent process. The cold drawn wire is then subjected to an annealing treatment.
焼鈍は、６００〜７００℃で３〜８時間加熱し、次いで
５５０〜６５０℃から空冷することにより行なわれる。
特に好ましい焼鈍条件は、６５０℃に５時間加熱し、６
００℃まで１７℃／Ｈｒづつ３時間かかつて冷却し、次
いで６００℃から空冷することよりなる。５この焼鈍は
、冷間伸線工程で受けた歪を除去して磁壁の移動を容易
にさせるために行なわれる処理である。Annealing is performed by heating at 600-700°C for 3-8 hours and then air cooling from 550-650°C.
Particularly preferred annealing conditions are heating to 650°C for 5 hours,
It consists of cooling to 00°C at a rate of 17°C/hr for 3 hours and then air cooling from 600°C. 5 This annealing is a process performed to remove the strain received during the cold wire drawing process and facilitate the movement of domain walls.
この歪除去焼鈍に続いて仕上伸線が行なわれ、本発明に
かかる電磁鉄心が得られる。Following this strain relief annealing, finish wire drawing is performed to obtain the electromagnetic core according to the present invention.
この仕上伸４線は残留ひずみを少なくするために必要で
あり、１０％以下、好ましくは８％以下の加工度で行な
われる。１０％よりも高い加工度では歪が大きく、電磁
特性が低下する。This four-wire finish drawing is necessary to reduce residual strain, and is carried out at a processing degree of 10% or less, preferably 8% or less. If the degree of processing is higher than 10%, the strain will be large and the electromagnetic properties will deteriorate.
以上のようにして成形された電磁鉄心は、フエライト結
晶粒度番号が６程度であり、非常に安定した電磁特性を
示す。The electromagnetic core formed as described above has a ferrite grain size number of about 6 and exhibits very stable electromagnetic characteristics.
このことは、従来の電磁鉄心材に代えて極軟鋼を用いれ
ば、従来法における磁気焼鈍工程を実施しなくても、従
来法の電磁鉄心の特性に匹敵し又はそれ以上に優れた特
性を有する電磁鉄心が製作できることを示している。ま
た、本発明の方法によれば、伸線工程の大幅な短縮、及
び焼鈍（磁気焼鈍）工程の省略により大幅な製造コスト
の改善（４０％程度のコストダウン）がはかれることが
わかつた。前述の本発明にかかる電磁鉄心は通常、圧造
加工することにより第１図および第２図に示すような所
望の形状の電磁鉄心に製作される。This means that if ultra-soft steel is used in place of the conventional electromagnetic core material, the properties of the electromagnetic core can be comparable to or even better than those of the conventional method, even without the magnetic annealing process of the conventional method. This shows that an electromagnetic core can be manufactured. Furthermore, it has been found that according to the method of the present invention, the manufacturing cost can be significantly improved (about 40% cost reduction) by significantly shortening the wire drawing process and omitting the annealing (magnetic annealing) process. The above-described electromagnetic core according to the present invention is usually manufactured by forging into a desired shape as shown in FIGS. 1 and 2.
第１図及び第２図は直流２４用電磁鉄心である。このよ
うな直流２４Ｖ用電磁鉄心の場合には、軸部３を０．５
％以下の加工度で圧造し、頭部２及びボス部４を形成す
る。これ以上の加工度では、軸部に歪を生じさせ、電磁
特性に影響を与えることになるので、望ましくない。所
望の形状に圧造された電磁鉄心は、必要に応じて表面処
理される。Figures 1 and 2 show an electromagnetic core for DC 24. In the case of such a DC 24V electromagnetic core, the shaft portion 3 is
The head part 2 and the boss part 4 are formed by forging with a processing degree of less than 20%. A processing degree higher than this is not desirable because it causes distortion in the shaft portion and affects the electromagnetic characteristics. The electromagnetic core that has been forged into a desired shape is subjected to surface treatment as necessary.
この種の処理としては、通常、銅メツキ、次いでニツケ
ルメツキが施される。本発明を例示するために以下に実
施例を示す。This type of treatment usually involves copper plating followed by nickel plating. Examples are provided below to illustrate the invention.
実施例第１図及び第２図に示すような直流２４Ｖ用電磁
鉄心の製作を例示する。EXAMPLE The production of a 24 V DC electromagnetic core as shown in FIGS. 1 and 2 will be exemplified.
この電磁鉄心１は、頭部２、軸部３、ボス部４からなり
、その表層部には銅メツキ５及びニツケルメツキ６が施
されている。第３図に示すように、極軟鋼素線（φ７）
７を４８％の加工度で冷間伸線８し、次いで焼鈍処理（
６５０℃で５時間加熱後３時間で６００℃まで冷却し、
次いで６００℃で空冷）９に付した。This electromagnetic core 1 consists of a head part 2, a shaft part 3, and a boss part 4, and the surface layer thereof is plated with copper 5 and nickel plating 6. As shown in Figure 3, a very mild steel wire (φ7)
7 was subjected to cold wire drawing 8 at a working degree of 48%, and then annealing treatment (
After heating at 650°C for 5 hours, cooling to 600°C for 3 hours,
Then, it was air-cooled at 600°C).
次いで８％の加工度で仕上伸線１０を行ない、本発明に
かかる電磁鉄心を得た。得られた電磁鉄心を０．５％の
加工度で圧造加工１１して頭部２とボス部４を形成させ
た。次いで、形成された鉄心に表面処理］２ （５μの
銅メツキ、６μのニツケルメツキ）を施し、製品を得た
。下記の第１表に素材の種類、化学成分、冷間伸線加工
度、製作された電磁鉄心の特性を要約する。Next, finishing wire drawing 10 was carried out at a processing rate of 8% to obtain an electromagnetic core according to the present invention. The obtained electromagnetic core was subjected to a forging process 11 at a processing rate of 0.5% to form a head part 2 and a boss part 4. Next, the formed iron core was subjected to surface treatment]2 (5μ copper plating, 6μ nickel plating) to obtain a product. Table 1 below summarizes the type of material, chemical composition, degree of cold wire drawing, and characteristics of the manufactured electromagnetic core.
また、比較のために、電磁鉄心材（ＳＵＹＢ）から従来
の方法により製造された電磁鉄心の特性も示す。本発明
の電磁鉄心を用いて成形された製品にかかる頭部２、軸
部３及びボス部４の金属組織の顕微鏡写真（Ｘｌ２Ｏ）
をそれぞれ第４図、第５図及び第６図として示す。For comparison, the characteristics of an electromagnetic core manufactured from electromagnetic iron core material (SUYB) by a conventional method are also shown. Micrograph (Xl2O) of the metal structure of the head 2, shaft 3, and boss 4 of a product molded using the electromagnetic core of the present invention
are shown in FIGS. 4, 5, and 6, respectively.
頭部及びボス部には明瞭な材料流れが認められた（第４
及び６図）が、軸部３には塑性歪の少ない均一なフエラ
イト粒子（粒度番号６）の存在が認められた（第５図）
。また、上記で製作された電磁鉄心Ａ及びＢ並びに従来
法の電磁鉄心ＳＵＹＢの磁化試験を行なつた。試験は、
市販の直流磁化測定装置で行なつた。結果を第７図に示
す。本発明の電磁鉄心Ａは、ＳＵＹＢからの鉄心に相当
する磁化力を持つていることがわかる。また、冷間伸線
の加工度が小さい鉄心Ｂは磁化力が小さい。Clear material flow was observed in the head and boss parts (No. 4)
and Fig. 6), but the presence of uniform ferrite particles (particle size number 6) with little plastic strain was observed in the shaft portion 3 (Fig. 5).
. In addition, magnetization tests were conducted on the electromagnetic cores A and B produced above and the conventional electromagnetic core SUYB. The exam is
The measurement was carried out using a commercially available DC magnetization measuring device. The results are shown in FIG. It can be seen that the electromagnetic core A of the present invention has a magnetizing force equivalent to that of the core from SUYB. Moreover, the iron core B, which has a small degree of cold wire drawing, has a small magnetizing force.
第１図及び第２図は、本発明にかかる電磁鉄心を用て成
形された標準的な電磁鉄心の平面図であり、第３図は、
本発明の電磁鉄心の製作法の工程図であり、第４図、第
５図及び第６図は、第１図および第２図に示す電磁鉄心
の金属組織の顕微鏡写真（Ｘｌ２Ｏ）であり、第７図は
、電磁鉄心の磁化特性を示すグラフである。
１・・・・・・電磁鉄心、２・・・・・・頭部、３・・
・・・・軸部、４・・・・・・ボス部、５・・・・・・
銅メツキ、６・・・・・・ニツケルメツキ、７・・・・
・・極軟鋼素線、８・・・・・・冷間伸線、９・・・・
・・焼鈍処理、１０・・・・・・仕上伸線、１１・・・
・・・圧造加工。1 and 2 are plan views of a standard electromagnetic core formed using the electromagnetic core according to the present invention, and FIG.
4, 5 and 6 are micrographs (Xl2O) of the metal structure of the electromagnetic core shown in FIGS. 1 and 2, FIG. 7 is a graph showing the magnetization characteristics of the electromagnetic core. 1... Electromagnetic core, 2... Head, 3...
...Shaft part, 4...Boss part, 5...
Copper plating, 6... Nickel plating, 7...
・・Extremely mild steel wire, 8・・・・Cold wire drawing, 9・・・・
...Annealing treatment, 10...Final wire drawing, 11...
...Heading processing.
Claims (1)
し、次いで焼鈍処理された伸線を仕上げ伸線することを
特徴とし、前記極軟鋼素線は０．０１重量％またはそれ
以下の炭素含有量および０．３１重量％以下のその他の
不純物含有量を有することを特徴とする極軟鋼による電
磁鉄心の製作方法。 ２ 特許請求の範囲第１項に記載の方法において、冷間
伸線が２０％以上の加工度で行なわれ仕上げ伸線が１０
％以下の加工度で行なわれることを特徴とする方法。 ３ 特許請求の範囲第１項に記載の方法において、焼鈍
処理が６００〜７００℃で３〜８時間、次いで５５０〜
６５０℃から空冷することにより行なわれることを特徴
とする方法。[Scope of Claims] 1. A very mild steel strand is cold drawn, the drawn wire is subjected to an annealing treatment, and the annealed wire is then finished drawn, 1. A method for manufacturing an electromagnetic core using extremely mild steel, characterized in that the content is 0.01% by weight or less of carbon and the content of other impurities is 0.31% by weight or less. 2. In the method according to claim 1, the cold wire drawing is performed at a working ratio of 20% or more, and the finishing wire drawing is performed at a working ratio of 10% or more.
% or less. 3. In the method according to claim 1, the annealing treatment is performed at 600-700°C for 3-8 hours, then at 550-700°C for 3-8 hours.
A method characterized in that it is carried out by air cooling from 650°C.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54171878A JPS5953683B2 (en) | 1979-12-29 | 1979-12-29 | Manufacturing method of electromagnetic core |
| US06/200,421 US4369077A (en) | 1979-12-29 | 1980-10-24 | Method of manufacturing an electromagnetic core |
| DE19803049291 DE3049291A1 (en) | 1979-12-29 | 1980-12-29 | METHOD FOR PRODUCING A CORE FOR ELECTROMAGNETIC DEVICES AND CORE PRODUCED BY SUCH A METHOD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54171878A JPS5953683B2 (en) | 1979-12-29 | 1979-12-29 | Manufacturing method of electromagnetic core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5696805A JPS5696805A (en) | 1981-08-05 |
| JPS5953683B2 true JPS5953683B2 (en) | 1984-12-26 |
Family
ID=15931461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54171878A Expired JPS5953683B2 (en) | 1979-12-29 | 1979-12-29 | Manufacturing method of electromagnetic core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5953683B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069348B (en) * | 2010-11-19 | 2015-04-22 | 宁波行一汽车零部件有限公司 | Method for manufacturing hose connector core |
| CN102773674B (en) * | 2012-08-11 | 2014-07-23 | 安徽省小小科技实业有限责任公司 | Hot forging, cold drawing composite molding process of bowl-shaped piece |
| CN103056621B (en) * | 2013-01-06 | 2015-02-11 | 山西经纬合力机械制造有限公司三厂 | Cold drawing processing technology of rocker support rod of spinning frame |
| CN112959003B (en) * | 2021-02-02 | 2022-06-14 | 安阳凯地磁力科技股份有限公司 | Processing technology of integrated electromagnetic ferromagnetic core tube |
| CN113857272A (en) * | 2021-09-08 | 2021-12-31 | 山东兰海新材料科技有限公司 | Thermal drawing device and drawing method of ultrafine filament |
-
1979
- 1979-12-29 JP JP54171878A patent/JPS5953683B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5696805A (en) | 1981-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1105710A (en) | Wear-resistant high permeability magnetic alloy and method of manufacturing the same | |
| JP2007214366A (en) | Powder for powder magnetic core, powder magnetic core and production method thereof | |
| JP3294029B2 (en) | Wear-resistant high-permeability alloy, method for producing the same, and magnetic recording / reproducing head | |
| US3892605A (en) | Method of producing primary recrystallized textured iron alloy member having an open gamma loop | |
| US3415696A (en) | Process of producing silicon steel laminations having a very large grain size after final anneal | |
| US1669648A (en) | Magnetic material | |
| JP5374233B2 (en) | Soft magnetic steel materials, soft magnetic steel parts, and methods for producing them | |
| JPS63117406A (en) | Amorphous alloy dust core | |
| US1818070A (en) | Magnetic body | |
| US1818054A (en) | Magnetic material | |
| JPS60258414A (en) | Production of non-oriented electrical iron sheet having high magnetic flux density | |
| US1881711A (en) | Magnetic structure | |
| JPH0742559B2 (en) | Amorphous alloy ribbon for magnetic core with excellent space factor and method for producing the same | |
| JPS6110962B2 (en) | ||
| KR830001552B1 (en) | Manufacturing method of electronic iron core | |
| US1669646A (en) | Magnetic material | |
| US2161926A (en) | Method of manufacturing permanent magnets | |
| JPH0273919A (en) | Manufacture of nonoriented electrical steel sheet having excellent magnetic characteristics | |
| JPH07197220A (en) | Production of magnetic alloy | |
| JPS6333518A (en) | Non-oriented electrical steel sheet having low iron loss and excellent magnetic flux density and its production | |
| JPS60224728A (en) | Wear resistant high magnetic permeability alloy and its manufacture and magnetic recording/reproducing head | |
| JPS5983723A (en) | Preparation of non-directional electric iron plate having high magnetic flux density | |
| JPS5831367B2 (en) | Method for manufacturing non-oriented electrical steel strip with excellent magnetic properties | |
| US1651957A (en) | Insulation of finely-divided magnetic material | |
| JPH02194154A (en) | Manufacture of water-resistant high permeability alloy |