JPH0719656B2 - Method for manufacturing semi-open saddle type high frequency heating coil for crankshaft - Google Patents
Method for manufacturing semi-open saddle type high frequency heating coil for crankshaftInfo
- Publication number
- JPH0719656B2 JPH0719656B2 JP3125090A JP12509091A JPH0719656B2 JP H0719656 B2 JPH0719656 B2 JP H0719656B2 JP 3125090 A JP3125090 A JP 3125090A JP 12509091 A JP12509091 A JP 12509091A JP H0719656 B2 JPH0719656 B2 JP H0719656B2
- Authority
- JP
- Japan
- Prior art keywords
- heating
- conductor
- conductors
- coil
- heating conductors
- 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 - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Description
【０００１】[0001]
【産業上の利用分野】本発明は、クランクシャフトのジ
ャーナル部やピン部を加熱するクランクシャフト用半開
放鞍型高周波加熱コイル（以下、クランクシャフト用半
開放鞍型高周波加熱コイルを単に加熱コイルと記す) の
製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crankshaft semi-open saddle type high frequency heating coil for heating a crankshaft journal portion and a pin portion (hereinafter, a crankshaft semi-open saddle type high frequency heating coil will be referred to simply as a heating coil. Note) regarding the manufacturing method.
【０００２】[0002]
【従来の技術】以下、図面を参照して従来の技術を説明
する。クランクシャフトのジャーナル部やピン部を加熱
する場合、被焼入部は円柱形状であって、加熱コイルを
被焼入部に跨がるように接近配置してから、この加熱コ
イルに高周波電流を通電する。まず、この加熱コイルの
構造について説明する。2. Description of the Related Art A conventional technique will be described below with reference to the drawings. When heating the journal part or pin part of the crankshaft, the hardened part has a cylindrical shape, and the heating coil is placed close to the hardened part, and then a high-frequency current is applied to this heating coil. . First, the structure of this heating coil will be described.
【０００３】図13に示すように、この種の従来の加熱コ
イル200 は、コイル片200A、コイル片200Aと同形でコイ
ル片200Aと対向するように配設されたコイル片200B、コ
イル片200Aと200Bを接続するほぼ逆Ｕ字形の接続導体27
および電源供給導体28、29を備えている。As shown in FIG. 13, a conventional heating coil 200 of this type includes a coil piece 200A, a coil piece 200B having the same shape as the coil piece 200A, and a coil piece 200B and a coil piece 200A. Almost inverted U-shaped connecting conductor for connecting 200B 27
And power supply conductors 28, 29.
【０００４】コイル片200Aは、直列に接続された 加熱
導体21〜23によってほぼコ字形に形成されており、加熱
導体21と23は、被焼入部の周方向にほぼ１／４円弧状に
形成されており、導体21と23の一端同士は、被焼入部の
軸方向（矢印Ｐ方向）に平行な直線状の導体22によって
接続されている。The coil piece 200A is formed in a substantially U-shape by the heating conductors 21 to 23 connected in series, and the heating conductors 21 and 23 are formed in an approximately 1/4 arc shape in the circumferential direction of the hardened portion. One ends of the conductors 21 and 23 are connected by a linear conductor 22 parallel to the axial direction (arrow P direction) of the hardened portion.
【０００５】コイル片200Bは、コイル片200Aの加熱導体
21〜23に対応する加熱導体24〜26を備えている。そし
て、加熱導体23と24が接続導体27によって接続されてお
り、加熱導体21と26にはそれぞれ電源供給導体28と29が
接続されている。電源供給導体28と29の間には、スペー
サ301 が配置されており、また、スペーサ301 に対向す
るように配置されたスペーサ302 を囲むように接続導体
27が形成配設されている。The coil piece 200B is a heating conductor of the coil piece 200A.
The heating conductors 24 to 26 corresponding to 21 to 23 are provided. The heating conductors 23 and 24 are connected by a connection conductor 27, and the heating conductors 21 and 26 are connected to power supply conductors 28 and 29, respectively. A spacer 301 is arranged between the power supply conductors 28 and 29, and a connecting conductor is provided so as to surround the spacer 302 arranged so as to face the spacer 301.
27 are formed and arranged.
【０００６】スペーサ301 、302 は、加熱コイル200が
固定されている図示しないコイル側板に取り付けらされ
ており、スペーサ301 、302 の先端部分が被焼入部に接
触して、加熱コイル200 が被焼入部を加熱中、被焼入部
と加熱コイル200 間の空隙の距離を一定に保つ役目をす
る。加熱コイル200 の加熱導体22と25の外側には、図示
しないそれぞれ１対の第２および第３のスペーサが設け
られている。なお、電源供給導体28と29の中空部分200C
およびその他の導体の図示しない中空部分は、加熱コイ
ル200 を冷却する冷却液の流通路となっている。The spacers 301 and 302 are attached to a coil side plate (not shown) to which the heating coil 200 is fixed, and the tip portions of the spacers 301 and 302 come into contact with the hardened portion, so that the heating coil 200 is burned. It serves to keep the distance of the air gap between the hardened part and the heating coil 200 constant during heating of the hardened part. Outside the heating conductors 22 and 25 of the heating coil 200, a pair of second and third spacers (not shown) are provided. In addition, the hollow portion 200C of the power supply conductors 28 and 29
A hollow portion (not shown) of each of the conductors and the other conductors serves as a flow path for a cooling liquid that cools the heating coil 200.
【０００７】加熱コイル200 を製作するには、まず、銅
等の良導電金属製管を、接断、折曲、或いはろう付けす
ることによって、加熱導体21〜26、接続導体27、電源供
給導体28および29を製作する。次いで、これら導体をろ
う付けによって接続して加熱コイル200 を完成する。In order to manufacture the heating coil 200, first, a tube made of a good conductive metal such as copper is cut, bent or brazed to form the heating conductors 21 to 26, the connection conductor 27, the power supply conductor. Build 28 and 29. Next, these conductors are connected by brazing to complete the heating coil 200.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、このよ
うにして製作された上記の加熱コイル200 には以下に述
べる問題がある。即ち、接続導体27には、例えばろう付
け部分272 があり、また、電源供給導体28と加熱導体21
との接続部、加熱導体21と22との接続部、加熱導体22と
23との接続部および加熱導体23と接続導体27との接続部
には、それぞれ、ろう付け部分211 、221 、231 および
271 がある。However, the above heating coil 200 manufactured in this manner has the following problems. That is, the connection conductor 27 has, for example, a brazing portion 272, and the power supply conductor 28 and the heating conductor 21 are provided.
With the heating conductors 21 and 22, the connection with the heating conductors 22 and
The brazed portions 211, 221, 231, and 23 are connected to the connecting portion with the heating conductor 23 and the connecting portion with the heating conductor 23, respectively.
There are 271.
【０００９】更に、接続導体27と加熱導体24との接続
部、加熱導体24と25との接続部、加熱導体25と26の接続
部および加熱導体26と電源供給導体29との接続部には、
それぞれ、図示しないろう付け部分、ろう付け部分251
、261 および291 がある。Further, the connecting portion between the connecting conductor 27 and the heating conductor 24, the connecting portion between the heating conductors 24 and 25, the connecting portion between the heating conductors 25 and 26, and the connecting portion between the heating conductor 26 and the power supply conductor 29 are ,
Brazing part and brazing part 251 which are not shown, respectively
, 261 and 291.
【００１０】この加熱コイル200 に高周波電流を通電し
た場合、高周波電流は主に加熱コイル200 の被焼入部に
対向した部分および被焼入部に近い部分に流れるのであ
るが、上記ろう付け部分の内、例えばろう付け部分251
、261 は被焼入部に対向しているので、このようなろ
う付け部分には高周波電流が流れる。また、例えばろう
付け部分211 、271および291 においても、これらろう
付け部分の内、被焼入部に接近している部分211a、271a
および291aには、高周波電流が流れる。When a high-frequency current is passed through the heating coil 200, the high-frequency current flows mainly to the portion of the heating coil 200 facing the hardened portion and the portion close to the hardened portion. , For example brazed part 251
, 261 are opposed to the hardened portion, so a high-frequency current flows in such a brazed portion. Also, for example, in the brazing parts 211, 271 and 291, of these brazing parts, the parts 211a, 271a that are close to the hardened part are included.
A high-frequency current flows through 291a and 291a.
【００１１】このように、加熱コイル200 の被焼入部に
対向した面、或いは被焼入部に近い部分のろう付け部分
には、高周波電流が流れるので、加熱コイル200 を長期
にわたって使用すると、このようなろう付け部分が劣化
して加熱コイル200 が破損し、加熱コイル200 の冷却液
が漏洩したり、加熱コイル200 が被焼入部に接触したり
する。As described above, a high-frequency current flows through the surface of the heating coil 200 facing the hardened portion or the brazing portion near the hardened portion. The brazing part deteriorates, the heating coil 200 is damaged, the cooling liquid of the heating coil 200 leaks, and the heating coil 200 contacts the hardened part.
【００１２】本発明は上記事情に鑑みて創案されたもの
であって、被焼入部に対向した部分或いは被焼入部に近
い部分にろう付け部分が無く、従って、長期間使用して
も劣化しない加熱コイルを製造する方法を提供すること
を目的としている。The present invention was devised in view of the above circumstances, and there is no brazing portion in the portion facing the hardened portion or in the portion close to the hardened portion, and therefore does not deteriorate even after long-term use. It is an object to provide a method of manufacturing a heating coil.
【００１３】[0013]
【課題を解決するための手段】上記問題を解決するため
に、本発明の加熱コイルの製造方法は、円柱形状のワー
クの周面である被焼入部に跨がるように接近配置されて
被焼入部を加熱する加熱コイルであって、同形で対向す
るように配設されたほぼコ字形の第１および第２コイル
片、両コイル片の一端同士を接続するほぼ逆Ｕ字形の接
続導体および両コイル片の他端にそれぞれ接続された１
対の電源供給導体とを具備し、第１コイル片は、被焼入
部の周方向にほぼ１／４円弧状に形成された平行な１対
の第１、第３加熱導体と、第１、第３加熱導体の一端同
士を接続し被焼入部の軸方向に平行な直線状の第２加熱
導体を備え、第２コイル片は、被焼入部の周方向にほぼ
１／４円弧状に形成された平行な１対の第４、第６加熱
導体と、第４、第６加熱導体の一端同士を接続し被焼入
部の軸方向に平行な直線状の第５加熱導体と、第１スペ
ーサが配設されるように第１、第６加熱導体間に設けた
第１スペースと、第２スペーサが配設されるように接続
導体が３方を囲む第２スペースとを備え、且つ、各第１
〜第６加熱導体および接続導体は、断面視において、被
焼入部に対向したほぼＵ字形の本体と、本体の上端面に
載置され且つ本体にろう付けされて本体の開口を覆う平
板状の蓋とを有する加熱コイルの製造方法において、素
材の表面の一部を加工して、第１、第２、第５および第
６加熱導体の本体の上端面が露出した第１円柱部分を形
成する工程と、素材の表面の他部を加工して、第３およ
び第４加熱導体の本体の上端面が露出した第２円柱部分
と接続導体の本体の上端面が露出した接続導体用凸部を
形成する工程と、第１および第２円柱部分の周面に、第
１〜第６加熱導体の中空部分となる溝と、第１、第３加
熱導体間の空所となる溝と、第４、第６加熱導体間の空
所となる溝とを加工し、且つ、接続導体用凸部の表面に
接続導体の中空部分となる溝を加工する工程と、前記工
程を終えた素材を切断して、第１〜第６加熱導体および
接続導体の一体形成された本体を形成する工程と、前記
工程によってえた第１〜第６加熱導体および接続導体の
本体に蓋をろう付けする工程とを含んでいる。In order to solve the above problems, in the method for manufacturing a heating coil of the present invention, the heating coil is closely arranged so as to straddle the hardened portion which is the peripheral surface of the cylindrical work. A heating coil for heating a quenching portion, the first and second coil pieces being substantially U-shaped and arranged to face each other in the same shape, a substantially inverted U-shaped connecting conductor connecting one ends of both coil pieces, and 1 connected to the other ends of both coil pieces
A pair of power supply conductors, and the first coil piece includes a pair of parallel first and third heating conductors formed in a substantially arc shape in the circumferential direction of the hardened portion; The third heating conductor is provided with a linear second heating conductor that connects one ends of the third heating conductor and is parallel to the axial direction of the hardened portion, and the second coil piece is formed in an approximately ¼ arc shape in the circumferential direction of the hardened portion. Pair of parallel fourth and sixth heating conductors, a linear fifth heating conductor that connects one ends of the fourth and sixth heating conductors and is parallel to the axial direction of the hardened portion, and a first spacer Is provided between the first and sixth heating conductors, and a second space is provided so that the connection conductor surrounds three sides so that the second spacer is provided. First
-The sixth heating conductor and the connecting conductor are, in a cross-sectional view, a substantially U-shaped main body facing the portion to be hardened, and a flat plate-shaped body mounted on the upper end surface of the main body and brazed to the main body to cover the main body opening. In a method of manufacturing a heating coil having a lid, a part of the surface of the raw material is processed to form a first cylindrical portion where the upper end surfaces of the main bodies of the first, second, fifth and sixth heating conductors are exposed. The process and the other part of the surface of the material are processed to form the second cylindrical portion where the upper end surfaces of the main bodies of the third and fourth heating conductors are exposed and the convex portion for connecting conductors where the upper end surfaces of the main bodies of the connecting conductors are exposed. A step of forming, a groove to be a hollow portion of the first to sixth heating conductors, a groove to be a space between the first and third heating conductors, and a fourth surface on the peripheral surfaces of the first and second cylindrical portions, A groove for forming a space between the sixth heating conductors, and a hollow portion of the connection conductor on the surface of the protrusion for connection conductor. A step of processing a groove to be formed, a step of cutting the raw material after the step to form a main body integrally formed with the first to sixth heating conductors and a connection conductor, and first to first steps obtained by the steps. 6 brazing the lid to the body of the heating conductor and the connecting conductor.
【００１４】[0014]
【実施例】以下図面を参照して本考案の一実施例を説明
する。図１〜12は本実施例を説明するための図面であっ
て、図１は本実施例の第４工程を終了したときの素材の
斜視図、図２と３はそれぞれ加熱コイルの素材の正面図
と側面図、図４と５は第１工程後の素材の正面図と側面
図、図６と７は第２工程後の素材の正面図と側面図、図
８は第３工程の説明図、図９は第４工程後の素材の正面
図、図10は図11のＡ−Ａ線矢視断面を例にとった第５工
程の説明図、図11は完成した高周波加熱コイルの斜視
図、図12は加熱コイルが被焼入部に載置された状態の説
明図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 12 are drawings for explaining the present embodiment, FIG. 1 is a perspective view of the material when the fourth step of the present embodiment is completed, and FIGS. 2 and 3 are front views of the material of the heating coil, respectively. Figures and side views, FIGS. 4 and 5 are front and side views of the material after the first step, FIGS. 6 and 7 are front and side views of the material after the second step, and FIG. 8 is an explanatory view of the third step. 9, FIG. 9 is a front view of the material after the fourth step, FIG. 10 is an explanatory view of the fifth step using the cross section taken along the line AA of FIG. 11 as an example, and FIG. 11 is a perspective view of the completed high-frequency heating coil. FIG. 12 is an explanatory view of a state where the heating coil is placed on the hardened part.
【００１５】本実施例の方法によって製造された図11に
示す加熱コイル100 は、外形形状においては、図13で説
明した従来の加熱コイル200 と同様である。加熱コイル
100は、図12に示すように、軸502 を中心として回転す
る例えばクランクシャフトのジャーナル部500 に、跨が
るように配置されてジャーナル部500 の周面である被焼
入部501 を加熱するのに用いられる。そして、加熱コイ
ル100は、加熱コイル200 のコイル片200A、200B、加熱
導体21〜26、接続導体27、電源供給導体28および29にそ
れぞれ同等乃至対応したコイル片100A、100B、加熱導体
11〜16、接続導体17、電源供給導体18および19を備えて
いる。The heating coil 100 shown in FIG. 11 manufactured by the method of this embodiment is similar in external shape to the conventional heating coil 200 described in FIG. Heating coil
As shown in FIG. 12, 100 heats the hardened part 501 which is the peripheral surface of the journal part 500 and is arranged so as to straddle the journal part 500 of the crankshaft which rotates about the shaft 502. Used for. The heating coil 100 includes coil pieces 200A and 200B, heating conductors 21 to 26, heating conductors 21 to 26, connection conductor 27, power supply conductors 28 and 29 that are equivalent to or correspond to the coil pieces 100A and 100B, and the heating conductors, respectively.
11 to 16, a connection conductor 17, and power supply conductors 18 and 19 are provided.
【００１６】加熱コイル100 は、加熱導体11と16の間
に、図12で説明したスペーサ301 を、また、逆Ｕ字状に
形成された接続導体17の凹所として、スペーサ302 を、
それぞれ、収容するスペース100Dおよび100Eを設けてい
る。なお、100Fは加熱導体11と13の間の空所であり、10
0Gは加熱導体14と16の間の空所である。In the heating coil 100, the spacer 301 described with reference to FIG. 12 is provided between the heating conductors 11 and 16, and the spacer 302 is provided as a recess of the connecting conductor 17 formed in an inverted U shape.
Spaces 100D and 100E for accommodating each are provided. In addition, 100F is a space between the heating conductors 11 and 13,
0G is the void between the heating conductors 14 and 16.
【００１７】次に、加熱導体11〜16（第１〜第６導体)
および接続導体17の断面構造について、図10を参照し、
加熱導体11を例にとって説明する。図10に示すように、
加熱導体11は、平行な１対の平板状の側板11c と、側板
11c の下端同士を接続し両側板11c と一体形成された平
板状の底板11d とを有する本体11a と、本体11a の開口
を塞ぐように本体11a の上端面11e に載置されて、両側
板11c の上端面11e に載置され、ろう付け111 によって
側板11c の上端部分に固定された平板状の蓋11b とを備
えている。11f は、本体11a と蓋11b によって形成され
た加熱導体11の中空部分であって、この中空部分11f は
加熱コイル100 の冷却液の流通路となる。Next, heating conductors 11 to 16 (first to sixth conductors)
And for the cross-sectional structure of the connection conductor 17, with reference to FIG.
The heating conductor 11 will be described as an example. As shown in Figure 10,
The heating conductor 11 is composed of a pair of parallel flat side plates 11c and side plates.
11c is placed on the upper surface 11e of the main body 11a so as to cover the opening of the main body 11a and the main body 11a which has the flat bottom plate 11d integrally formed with the both side plates 11c and the both side plates 11c. And a flat plate-like lid 11b fixed to the upper end portion of the side plate 11c by brazing 111. Reference numeral 11f denotes a hollow portion of the heating conductor 11 formed by the main body 11a and the lid 11b, and this hollow portion 11f serves as a cooling liquid flow passage for the heating coil 100.
【００１８】同様に、加熱導体12〜16および接続導体17
も、それぞれ、図１に示す本体12a〜17a 、中空部分12f
〜17f （但し中空部分15f は図示しない) 、上端面12e
〜17e （但し上端面15e は図示しない) および蓋11b
〜17b （但し蓋15b は図示しない) を備えている。Similarly, the heating conductors 12 to 16 and the connecting conductor 17
Also, the main body 12a to 17a and the hollow portion 12f shown in FIG.
~ 17f (however, hollow part 15f is not shown), upper end face 12e
~ 17e (however, upper end surface 15e is not shown) and lid 11b
.About.17b (however, the lid 15b is not shown).
【００１９】以下、加熱コイル100 の製造方法を説明す
る。まず、加熱コイル100 の素材として、良導電金属製
（例えば銅) であって図２に示すような円柱状乃至円盤
状の素材1 を準備する。この素材1は、厚みD が製造完
成時の加熱コイル100 の幅D（図11) と等しく、また、
半径R は完成した加熱コイル100 を被焼入部501 に載置
した状態において、被焼入部501 の軸502 から接続導体
17の最遠端（図11に示す接続導体17の上辺171 の端部17
2)までの距離に等しいか、それ以上の半径の素材が選定
される。1bは素材1 の軸である。なお、素材1 から２個
の加熱コイル100 （但し前記蓋11b 〜17b を除く) が製
作される。The method of manufacturing the heating coil 100 will be described below. First, as a material for the heating coil 100, a cylindrical or disc-shaped material 1 made of a good conductive metal (for example, copper) and shown in FIG. 2 is prepared. In this material 1, the thickness D is equal to the width D (Fig. 11) of the heating coil 100 when manufacturing is completed, and
The radius R is the connecting conductor from the shaft 502 of the hardened part 501 when the completed heating coil 100 is placed on the hardened part 501.
The farthest end of 17 (the end 17 of the upper side 171 of the connecting conductor 17 shown in FIG. 11)
A material with a radius equal to or greater than the distance to 2) is selected. 1b is the axis of material 1. In addition, two heating coils 100 (excluding the lids 11b to 17b) are manufactured from the material 1.
【００２０】第１工程においては、旋盤等を用いて、図
４と５に示すように、素材1 の軸1bに円柱状の治具孔2a
を貫通穿設すると共に、素材1 の周面1aの一部を加工し
て、加熱導体11、12、15、16の本体11a 、12a 、15a 、
16a の上端面11e 、12e 、15e 、16e が露出した円柱部
分2 （第１円柱部分) を形成する。2bは円柱部分2 の周
面である。In the first step, using a lathe or the like, as shown in FIGS. 4 and 5, a cylindrical jig hole 2a is formed in the shaft 1b of the material 1.
And a part of the peripheral surface 1a of the material 1 is machined, and the main body 11a, 12a, 15a of the heating conductors 11, 12, 15, 16 is
The upper end surface 11e, 12e, 15e, 16e of 16a forms a cylindrical portion 2 (first cylindrical portion) in which it is exposed. 2b is the peripheral surface of the cylindrical part 2.
【００２１】第２工程においては、フライス盤等を用い
て、図６と７に示すように、第１工程で未加工であった
素材1 の周面1aの他部を加工して、加熱導体13、14の本
体13a 、14a の上端面13e 、14e が露出した円柱部分2c
（第２円柱部分) 、および、接続導体17の本体17a の上
端面17e が露出した直方体形状の接続導体用凸部2dを形
成する。In the second step, a milling machine or the like is used to process the other portion of the peripheral surface 1a of the raw material 1 which has not been processed in the first step, as shown in FIGS. , 14 main body 13a, cylindrical part 2c with upper end surface 13e, 14e of 14a exposed
(Second column portion), and a rectangular parallelepiped-shaped connecting conductor projection 2d in which the upper end surface 17e of the main body 17a of the connecting conductor 17 is exposed are formed.
【００２２】第３工程においては、図８に示すように、
第２工程を終えた素材1 の治具孔2aに、ボルト形状の治
具3 の円柱状の軸3aを挿入後、ナット3cによって治具3
を素材1 に固定してから、治具3 の一端の頭部3bを回転
装置3dのチャック3eにて挟持し、治具3 の他端面をセン
ター3fによって支持する。In the third step, as shown in FIG.
After inserting the cylindrical shaft 3a of the bolt-shaped jig 3 into the jig hole 2a of the material 1 that has completed the second step, use the nut 3c to fix the jig 3
After being fixed to the material 1, the head 3b at one end of the jig 3 is clamped by the chuck 3e of the rotating device 3d, and the other end surface of the jig 3 is supported by the center 3f.
【００２３】そして、回転装置3dによって素材1 をゆっ
くりと回転しながら、エンドミル等によって円柱部分2
の周面2bを削設して加熱導体11の中空部分11f となる溝
11h、および加熱導体16の中空部分16f となる図示しな
い溝を形成する。同様に、円柱部分2cの表面を削設して
加熱導体13の中空部分13f と、加熱導体14の中空部分14
f となる図示しない溝を形成する。Then, while slowly rotating the raw material 1 by the rotating device 3d, the cylindrical portion 2 by an end mill or the like.
A groove that becomes the hollow part 11f of the heating conductor 11 by cutting the peripheral surface 2b of the
A groove (not shown) to be the hollow portion 16f of the heating conductor 16 is formed in 11h. Similarly, the surface of the cylindrical portion 2c is cut to remove the hollow portion 13f of the heating conductor 13 and the hollow portion 14 of the heating conductor 14.
A groove (not shown) to be f is formed.
【００２４】次いで、素材1 の回転を停止し、同じくエ
ンドミル等で、加熱導体12の中空部分12f となる溝12h
、接続導体17の中空部分17f となる溝17h 、および加
熱導体15の中空部分15f となる図示しない溝を形成す
る。更に、周面2bを削設して加熱導体11と13の間の空所
100Fとなる溝100fおよび加熱導体14と16の間の空所100G
となる図示しない溝を形成する。Then, the rotation of the raw material 1 is stopped, and the groove 12h which becomes the hollow portion 12f of the heating conductor 12 is also cut by an end mill or the like.
A groove 17h to be the hollow portion 17f of the connection conductor 17 and a groove (not shown) to be the hollow portion 15f of the heating conductor 15 are formed. Further, the peripheral surface 2b is eroded to form a space between the heating conductors 11 and 13.
Groove 100f to be 100F and void 100G between heating conductors 14 and 16
A groove (not shown) is formed.
【００２５】第４工程においては、加熱導体11を構成す
る本体11a の図10で説明した底板11d 、底板11d に相当
する加熱導体12〜16の底板、および接続導体17の底板
を、それぞれの本体と一体形成するために、また、図13
で説明したスペーサ301 、302を収容するスペース100D
と100Eを形成するために、第３工程を終えた素材1 をワ
イヤカット放電加工機等によって、図９に示すように、
切削する。これで、蓋11b 〜17b を除いた２個の加熱コ
イル100 がえられた。なお、この状態で、素材1の軸1b
から加熱導体11、16の端部を見た角度θは、約150 °で
あるように切削するのが一般的である。In the fourth step, the bottom plate 11d of the main body 11a constituting the heating conductor 11 described with reference to FIG. 10, the bottom plates of the heating conductors 12 to 16 corresponding to the bottom plate 11d, and the bottom plate of the connecting conductor 17 are provided in respective main bodies. Also, in order to be integrally formed with FIG.
Space 100D for accommodating the spacers 301 and 302 described in 1.
In order to form the 100 and 100E, the raw material 1 that has undergone the third step is processed by a wire cut electric discharge machine or the like as shown in FIG.
To cut. With this, two heating coils 100 excluding the lids 11b to 17b were obtained. In this state, the shaft 1b of the material 1
The angle .theta. From which the end portions of the heating conductors 11 and 16 are viewed is generally cut to be about 150.degree.
【００２６】第５工程においては、第４工程を終えた素
材1 に、別途製作した前記平板状の蓋11b 〜17b を、加
熱導体11〜16および接続導体17の本体11a 〜17a に、そ
れぞれ、ろう付けし、且つ、加熱導体11と16の端部に、
それぞれ、断面が４角形状の金属管からなる電源供給導
体18および19をろう付けして２個の加熱コイル100 が完
成する。このようにして製作された加熱コイル100 に
は、被焼入部501 に対向した部分、および被焼入部501
に接近した部分にろう付け部分がない。In the fifth step, the plate-shaped lids 11b to 17b, which are separately manufactured, are attached to the raw material 1 which has been subjected to the fourth step, to the heating conductors 11 to 16 and the main bodies 11a to 17a of the connecting conductors 17, respectively. Brazed and at the ends of the heating conductors 11 and 16,
The two heating coils 100 are completed by brazing the power supply conductors 18 and 19 each having a rectangular cross section and made of a metal tube. The heating coil 100 manufactured in this manner includes a portion facing the hardened portion 501 and a hardened portion 501.
There is no brazing part near the part.
【００２７】[0027]
【発明の効果】以上説明したように、本発明の製造方法
によれば、被焼入部に対向した部分、或いは被焼入部に
接近した部分に、ろう付け部分がない加熱コイルを製作
することができる。従って、この方法で製作された加熱
コイルを長期間使用しても、劣化することはない。従っ
て、加熱コイルの寿命が長くなる。As described above, according to the manufacturing method of the present invention, it is possible to manufacture a heating coil having no brazing portion in the portion facing the hardened portion or in the portion close to the hardened portion. it can. Therefore, even if the heating coil manufactured by this method is used for a long time, it does not deteriorate. Therefore, the life of the heating coil is extended.
【００２８】そして、加熱コイルを構成する各加熱導体
と接続導体との本体は、機械加工によって切削されるの
で、加熱コイルの製造の手間が少なくなり、また、製造
された加熱コイルの各部の寸法精度を向上させることが
できる。Since the main body of each heating conductor and the connecting conductor which constitutes the heating coil is cut by machining, the labor of manufacturing the heating coil is reduced, and the dimensions of each part of the manufactured heating coil are reduced. The accuracy can be improved.
【図１】本考案の一実施例の第４工程後の素材の斜視図
である。FIG. 1 is a perspective view of a material after a fourth step according to an embodiment of the present invention.
【図２】本考案の一実施例によって加工される素材の正
面図である。FIG. 2 is a front view of a material processed according to an embodiment of the present invention.
【図３】本考案の一実施例によって加工される素材の側
面図である。FIG. 3 is a side view of a material processed according to an embodiment of the present invention.
【図４】本考案の一実施例の第１工程後の素材の正面図
である。FIG. 4 is a front view of the material after the first step of the embodiment of the present invention.
【図５】本考案の一実施例の第１工程後の素材の側面図
である。FIG. 5 is a side view of the material after the first step of the embodiment of the present invention.
【図６】本考案の一実施例の第２工程後の素材の正面図
である。FIG. 6 is a front view of the material after the second step of the embodiment of the present invention.
【図７】本考案の一実施例の第２工程後の素材の側面図
である。FIG. 7 is a side view of the material after the second step of the embodiment of the present invention.
【図８】本考案の一実施例の第３工程の説明図である。FIG. 8 is an explanatory view of a third step of the embodiment of the present invention.
【図９】本考案の一実施例の第４工程後の素材の正面図
である。FIG. 9 is a front view of the material after the fourth step of the embodiment of the present invention.
【図１０】本考案の一実施例の第５工程の説明図であ
る。FIG. 10 is an explanatory view of a fifth step of one embodiment of the present invention.
【図１１】完成した加熱コイルの斜視図である。FIG. 11 is a perspective view of the completed heating coil.
【図１２】加熱コイルが被焼入部に載置された状態の説
明図である。FIG. 12 is an explanatory diagram showing a state in which a heating coil is placed on a portion to be hardened.
【図１３】従来の加熱コイルの斜視図である。FIG. 13 is a perspective view of a conventional heating coil.
1 素材 1b 表面 2 円柱部分 2b 円柱部分 2c 表面 2d 接続導体用凸部 11〜16 加熱導体 11a 〜17a 本体 11b 〜17b 蓋 11f 〜17f 中空部分 11h 〜13h 、17h 溝 17 接続導体 18、19 電源供給導体 100 高周波加熱コイル 100A、100B コイル片 100D、100E スペース 100F、100G 空所 100f 溝 301 、302 スペーサ 500 ジャーナル部 501 被焼入部 502 軸 1 Material 1b Surface 2 Cylindrical part 2b Cylindrical part 2c Surface 2d Convex part for connection conductor 11-16 Heating conductor 11a ~ 17a Main body 11b ~ 17b Lid 11f ~ 17f Hollow part 11h ~ 13h, 17h Groove 17 Connection conductor 18, 19 Power supply Conductor 100 High frequency heating coil 100A, 100B Coil piece 100D, 100E Space 100F, 100G Vacancy 100f Groove 301, 302 Spacer 500 Journal part 501 Hardened part 502 Axis
Claims (1)
に跨がるように接近配置されて被焼入部を加熱する高周
波加熱コイルであって、同形で対向するように配設され
たほぼコ字形の第１および第２コイル片、両コイル片の
一端同士を接続するほぼ逆Ｕ字形の接続導体および両コ
イル片の他端にそれぞれ接続された１対の電源供給導体
とを具備し、第１コイル片は、被焼入部の周方向にほぼ
１／４円弧状に形成された平行な１対の第１、第３加熱
導体と、第１、第３加熱導体の一端同士を接続し被焼入
部の軸方向に平行な直線状の第２加熱導体を備え、第２
コイル片は、被焼入部の周方向にほぼ１／４円弧状に形
成された平行な１対の第４、第６加熱導体と、第４、第
６加熱導体の一端同士を接続し被焼入部の軸方向に平行
な直線状の第５加熱導体と、第１スペーサが配設される
ように第１、第６加熱導体間に設けた第１スペースと、
第２スペーサが配設されるように接続導体が３方を囲む
第２スペースとを備え、且つ、各第１〜第６加熱導体お
よび接続導体は、断面視において、被焼入部に対向した
ほぼＵ字形の本体と、本体の上端面に載置され且つ本体
にろう付けされて本体の開口を覆う平板状の蓋とを有す
るクランクシャフト用半開放鞍型高周波加熱コイルの製
造方法において、素材の表面の一部を加工して、第１、
第２、第５および第６加熱導体の本体の上端面が露出し
た第１円柱部分を形成する工程と、素材の表面の他部を
加工して、第３および第４加熱導体の本体の上端面が露
出した第２円柱部分と接続導体の本体の上端面が露出し
た接続導体用凸部を形成する工程と、第１および第２円
柱部分の周面に、第１〜第６加熱導体の中空部分となる
溝と、第１、第３加熱導体間の空所となる溝と、第４、
第６加熱導体間の空所となる溝とを加工し、且つ、接続
導体用凸部の表面に接続導体の中空部分となる溝を加工
する工程と、前記工程を終えた素材を切断して、第１〜
第６加熱導体および接続導体の一体形成された本体を形
成する工程と、前記工程によってえた第１〜第６加熱導
体および接続導体の本体に蓋をろう付けすると共に、第
１および第６加熱導体の端部に、管状の電源供給導体を
接続する工程とを含むことを特徴とするクランクシャフ
ト用半開放鞍型高周波加熱コイルの製造方法。1. A high-frequency heating coil for heating a hardened portion which is closely arranged so as to straddle a hardened portion which is a peripheral surface of a cylindrical work, and is arranged so as to face each other in the same shape. The first and second coil pieces are substantially U-shaped, a substantially inverted U-shaped connecting conductor that connects one ends of both coil pieces, and a pair of power supply conductors that are respectively connected to the other ends of both coil pieces. , The first coil piece connects a pair of parallel first and third heating conductors formed in an approximately ¼ arc shape in the circumferential direction of the portion to be hardened and one ends of the first and third heating conductors. A second heating conductor having a linear shape parallel to the axial direction of the hardened part is provided.
The coil piece is formed by connecting a pair of parallel fourth and sixth heating conductors, which are formed in an approximately 1/4 circular arc shape in the circumferential direction of the hardened portion, and one end of the fourth and sixth heating conductors to each other. A linear fifth heating conductor parallel to the axial direction of the insertion portion, and a first space provided between the first and sixth heating conductors so that the first spacer is disposed,
The connection conductor has a second space surrounding the three sides so that the second spacer is arranged, and each of the first to sixth heating conductors and the connection conductor substantially opposes the portion to be hardened in a sectional view. A method for manufacturing a semi-open saddle type high frequency heating coil for a crankshaft, comprising: a U-shaped main body; and a flat plate-shaped lid placed on an upper end surface of the main body and brazed to the main body to cover an opening of the main body. By processing a part of the surface,
The step of forming the first columnar portion in which the upper end surfaces of the main bodies of the second, fifth and sixth heating conductors are exposed, and the other part of the surface of the material is processed to form the upper parts of the main bodies of the third and fourth heating conductors. A step of forming a convex portion for a connecting conductor in which the end surface is exposed and the upper end surface of the main body of the connecting conductor is exposed; and a step of forming the first to sixth heating conductors on the peripheral surfaces of the first and second cylindrical portions. A groove to be a hollow portion, a groove to be a space between the first and third heating conductors, a fourth,
A step of processing a groove to be a space between the sixth heating conductors and a groove to be a hollow portion of the connection conductor on the surface of the projection for connection conductor, and cutting the raw material after the step. , 1st
A step of forming a body in which the sixth heating conductor and the connection conductor are integrally formed, and a lid is brazed to the bodies of the first to sixth heating conductors and the connection conductor obtained in the step, and the first and sixth heating conductors And a step of connecting a tubular power supply conductor to the end of the semi-open saddle type high frequency heating coil for crankshaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3125090A JPH0719656B2 (en) | 1991-04-26 | 1991-04-26 | Method for manufacturing semi-open saddle type high frequency heating coil for crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3125090A JPH0719656B2 (en) | 1991-04-26 | 1991-04-26 | Method for manufacturing semi-open saddle type high frequency heating coil for crankshaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04328291A JPH04328291A (en) | 1992-11-17 |
| JPH0719656B2 true JPH0719656B2 (en) | 1995-03-06 |
Family
ID=14901599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3125090A Expired - Fee Related JPH0719656B2 (en) | 1991-04-26 | 1991-04-26 | Method for manufacturing semi-open saddle type high frequency heating coil for crankshaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0719656B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010038722A1 (en) * | 2008-10-02 | 2010-04-08 | Ntn株式会社 | High-frequency induction heating coil and method for the manufacture thereof and power transmission component for an automobile |
| WO2019216065A1 (en) * | 2018-05-11 | 2019-11-14 | 日本製鉄株式会社 | Power supply coil for electric resistance welding and pipe manufacturing equipment using same |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2717354B2 (en) * | 1994-02-14 | 1998-02-18 | 富士電子工業株式会社 | High frequency induction heating coil |
| JP2009218176A (en) * | 2008-03-12 | 2009-09-24 | Toyota Motor Corp | Coil head |
| JP5378000B2 (en) * | 2009-02-16 | 2013-12-25 | 株式会社幸和電熱計器 | Induction heating coil manufacturing method for induction hardening of engine crankshaft and induction heating coil |
| CN102045908B (en) * | 2009-10-20 | 2015-04-01 | 富士电子工业株式会社 | High frequency heating coil and heating method for workpiece |
-
1991
- 1991-04-26 JP JP3125090A patent/JPH0719656B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010038722A1 (en) * | 2008-10-02 | 2010-04-08 | Ntn株式会社 | High-frequency induction heating coil and method for the manufacture thereof and power transmission component for an automobile |
| JP2010086904A (en) * | 2008-10-02 | 2010-04-15 | Ntn Corp | High-frequency induction heating coil and method of manufacturing the same, and power transmission component for automobile |
| WO2019216065A1 (en) * | 2018-05-11 | 2019-11-14 | 日本製鉄株式会社 | Power supply coil for electric resistance welding and pipe manufacturing equipment using same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04328291A (en) | 1992-11-17 |
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