JP4618008B2 - Induction hardening method and apparatus for camshaft - Google Patents

Induction hardening method and apparatus for camshaft Download PDF

Info

Publication number
JP4618008B2
JP4618008B2 JP2005164025A JP2005164025A JP4618008B2 JP 4618008 B2 JP4618008 B2 JP 4618008B2 JP 2005164025 A JP2005164025 A JP 2005164025A JP 2005164025 A JP2005164025 A JP 2005164025A JP 4618008 B2 JP4618008 B2 JP 4618008B2
Authority
JP
Japan
Prior art keywords
cam lobe
induction hardening
camshaft
block
cam
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
Application number
JP2005164025A
Other languages
Japanese (ja)
Other versions
JP2006336087A (en
Inventor
浩吉 山本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP2005164025A priority Critical patent/JP4618008B2/en
Publication of JP2006336087A publication Critical patent/JP2006336087A/en
Application granted granted Critical
Publication of JP4618008B2 publication Critical patent/JP4618008B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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

Landscapes

  • Gears, Cams (AREA)
  • Heat Treatment Of Articles (AREA)

Description

本発明は、カムシャフトの高周波焼入れ方法とその装置、特に焼入れ部近傍に焼入れさせない部位を設けた部材に対する高周波焼入れ方法とその装置に関するものである。   The present invention relates to an induction hardening method and apparatus for a camshaft, and more particularly to an induction hardening method and apparatus for a member provided with a portion not to be quenched in the vicinity of a quenched portion.

従来の焼入れ部近傍に焼入れさせない部位（以下、非焼入れ部位という。）を設けた部材に対する高周波焼入れ方法として、非焼入れ部位を溶射被膜で覆い、焼入れ後に溶射被膜を除去する方法がある（特許文献１参照）。
特開平５−３４５９１１号公報 As a conventional induction hardening method for a member provided with a non-quenched portion (hereinafter referred to as a non-quenched portion) in the vicinity of a quenched portion, there is a method of covering the non-quenched portion with a sprayed coating and removing the sprayed coating after quenching (Patent Document). 1).
JP-A-5-345911

しかしながら、従来技術では、カムシャフトの非焼入れ部位に溶射を施すための溶射装置が必要となるとともに、焼入れ後の溶射被膜を除去するための設備も必要となり、設備が大型化、高コスト化するという課題がある。   However, the conventional technology requires a thermal spraying device for spraying the non-quenched portion of the camshaft, and also requires equipment for removing the thermal spray coating after quenching, which increases the size and cost of the equipment. There is a problem.

したがって、本発明の目的は、焼入れ部近傍に焼入れさせない部位を設けた部材に対する高周波焼入れ方法とその装置を、大型化や高コスト化を招くことなく提供することである。   Accordingly, an object of the present invention is to provide an induction hardening method and apparatus for a member provided with a portion not to be hardened in the vicinity of a hardened portion without causing an increase in size and cost.

本発明は、エンジンのバルブを開閉するカムロブを備えたカムシャフトの高周波焼入れ方法であって、前記カムロブの頂部近傍の軸方向端面をブロックにより両側から挟持し、前記ブロックにより前記カムロブを挟持した状態で、前記カムロブを加熱する高周波コイルを設置し、前記高周波コイルに所定時間通電後、前記カムロブを冷却液で急冷することを特徴とする。 The present invention is a method of induction hardening of a camshaft having a cam lobe that opens and closes a valve of an engine, wherein an axial end surface near the top of the cam lobe is sandwiched from both sides by a block, and the cam lobe is sandwiched by the block In this state, a high frequency coil for heating the cam lobe is installed, and the cam lobe is rapidly cooled with a coolant after energizing the high frequency coil for a predetermined time.

本発明では、カムロブの頂部近傍の軸方向端面をブロックにより両側から挟持することで、ブロックとカムロブとが一体化して、その熱容量が大きくなり、また頂部近傍はブロックに覆われるため、高周波コイルによる昇温後の冷却液がかかることがない。このため、頂部近傍の温度の低下速度は他の領域より抑制され、従来技術のような溶射装置等の設備を用いることなく、焼入れによる硬化を抑制できる。 In the present invention, the axial end face near the top of the cam lobe is sandwiched from both sides by the block, so that the block and the cam lobe are integrated to increase the heat capacity, and the vicinity of the top is covered with the block. The cooling liquid after the temperature rise due to is not applied. For this reason, the rate of temperature decrease in the vicinity of the top is suppressed from other regions, and hardening due to quenching can be suppressed without using equipment such as a thermal spraying apparatus as in the prior art.

図１と図２は、第１の実施形態の構成図を示し、本発明のカムシャフト１の高周波焼入れの構成を説明する図である。   1 and 2 are diagrams illustrating the configuration of the first embodiment and illustrating the configuration of induction hardening of the camshaft 1 of the present invention.

高周波焼入れされるカムシャフト１は、左右からスピンドル２、３により支持される。カムシャフト１上にはエンジンの気筒数に対応するカムロブ４ａ〜４ｆが設けられ、カムロブ４ａ〜４ｆの頂部８に高周波焼入れが施される。各カムロブ４ａ〜４ｆは、図示しないバルブに摺接し、カムロブ４ａ〜４ｆのカムプロフィールに沿って、バルブを開閉する。なお、カムシャフト１とカムロブ４ａ〜４ｆは、高周波焼入れ処理される前段階で、既に荒加工が実施されており、高周波焼入れ後に仕上げ加工を施して完成される。   The induction-hardened camshaft 1 is supported by spindles 2 and 3 from the left and right. Cam lobes 4a to 4f corresponding to the number of cylinders of the engine are provided on the cam shaft 1, and induction hardening is applied to the top portions 8 of the cam lobes 4a to 4f. Each cam lobe 4a-4f is in sliding contact with a valve (not shown), and opens and closes the valve along the cam profile of the cam lobe 4a-4f. The camshaft 1 and the cam lobes 4a to 4f have already been subjected to roughing before the induction hardening process, and are finished by finishing after induction hardening.

一つのカムロブ４ａには、各カムロブ４ａ〜４ｆの軸回りの角度基準となる基準穴（貫通孔）５が軸方向に貫通して形成される。この基準穴５は、仕上げ加工時の各カムロブ４ａ〜４ｆの角度基準として使用されるとともに、エンジン組み立て時にカムシャフト端部に設けられるスプロケットとの位置決めにも使用される。なお、この基準穴５は、高周波焼入れ後に仕上げ加工される。   In one cam lobe 4a, a reference hole (through hole) 5 serving as an angle reference around the axis of each cam lobe 4a to 4f is formed penetrating in the axial direction. The reference hole 5 is used as an angle reference for each of the cam lobes 4a to 4f at the time of finishing, and is also used for positioning with a sprocket provided at the camshaft end during engine assembly. The reference hole 5 is finished after induction hardening.

基準穴５が開口するカムロブ４ａの側面５ａを軸方向両側から挟持する位置決めブロック６、７が設けられる。位置決めブロック６、７は、本体部６ｂ、７ｂと、本体部６ｂ、７ｂの端面６ｃ、７ｃから軸方向に突出するピン６ａ、７ａとからなる。このピン６ａ、７ａが基準穴５に摺動可能に挿入し、位置決めブロック６、７の端面６ｃ、７ｃは、カムロブ４ａの軸方向の側面５ａに突き当たり、カムロブ４ａと一体的に構成される。この側面５ａと位置決めブロック６、７の端面６ｃ、７ｃとが接する、基準穴５を含む部位が高周波焼入れによる硬化が抑制される非焼入れ部位５ｃである。   Positioning blocks 6 and 7 are provided for clamping the side surface 5a of the cam lobe 4a in which the reference hole 5 is opened from both sides in the axial direction. The positioning blocks 6 and 7 include main body portions 6b and 7b and pins 6a and 7a protruding in the axial direction from the end surfaces 6c and 7c of the main body portions 6b and 7b. The pins 6a and 7a are slidably inserted into the reference hole 5, and the end surfaces 6c and 7c of the positioning blocks 6 and 7 abut against the side surface 5a in the axial direction of the cam lobe 4a and are configured integrally with the cam lobe 4a. A portion including the reference hole 5 where the side surface 5a and the end surfaces 6c and 7c of the positioning blocks 6 and 7 are in contact is a non-quenched portion 5c in which hardening by induction hardening is suppressed.

各カムロブ４ａ〜４ｆの頂部８には、高周波焼入れのための高周波コイル９がそれぞれ設置される。高周波コイル９は、各カムロブ４ａ〜４ｆの頂部８に施される高周波焼入れの焼入れ深さ（硬化層深さ）に応じてその周波数が設定される。また、高周波コイル９には、高周波コイル９により加熱された部位に冷却水をかける冷却水手段９ａが備えられる。   A high frequency coil 9 for induction hardening is installed on the top 8 of each cam lobe 4a-4f. The frequency of the high-frequency coil 9 is set according to the quenching depth (hardened layer depth) of induction hardening performed on the top 8 of each of the cam lobes 4a to 4f. Further, the high frequency coil 9 is provided with a cooling water means 9 a for applying cooling water to a portion heated by the high frequency coil 9.

次に図３及び図４を用いて高周波焼入れの手順を説明する。   Next, the procedure of induction hardening will be described with reference to FIGS.

まず、スピンドル２、３によりカムシャフト１を支持する（図４のステップＳ１）。続いて、図３（ａ）に示すように、基準穴５を形成したカムロブ４ａの軸回りの角度出しを行う突き当てブロック１０がカムロブ４ａのカム面５ｂを支持し、カムロブ４ａの凡その角度出しを行う（ステップＳ２）。   First, the camshaft 1 is supported by the spindles 2 and 3 (step S1 in FIG. 4). Subsequently, as shown in FIG. 3 (a), the abutting block 10 for setting the angle around the axis of the cam lobe 4a in which the reference hole 5 is formed supports the cam surface 5b of the cam lobe 4a, and the approximate angle of the cam lobe 4a. (Step S2).

そして、突き当てブロック１０による角度出しが終了したら、図３（ｂ）に示すように、位置決めブロック６、７のピン６ａ、７ａがカムロブ４ａの基準穴５に挿入され、本体部６ｂ、７ｂがカムロブ６ａの側面５ａを軸方向から挟持する（ステップＳ３）。位置決めブロック６、７のピン６ａ、７ａがカムロブ４ａの基準穴５に挿入されることで、カムロブ４ａ〜４ｆの角度が規定できるとともに、本体部６ｂ、７ｂがカムロブ６ａの側面５ａを軸方向から支持することで、カムロブ４ａ〜４ｆの軸方向の位置が規定される。このとき、本体部６ｂ、７ｂの端面６ｃ、７ｃは、カムロブ４ａの軸方向側面５ａと一体的に接続し、非焼入れ部位５ｃを規定する。   When the angle determination by the abutting block 10 is completed, as shown in FIG. 3B, the pins 6a and 7a of the positioning blocks 6 and 7 are inserted into the reference holes 5 of the cam lobe 4a, and the main body portions 6b and 7b are inserted. The side surface 5a of the cam lobe 6a is clamped from the axial direction (step S3). By inserting the pins 6a and 7a of the positioning blocks 6 and 7 into the reference hole 5 of the cam lobe 4a, the angles of the cam lobes 4a to 4f can be defined, and the main body portions 6b and 7b can move the side surface 5a of the cam lobe 6a from the axial direction. By supporting, the positions of the cam lobes 4a to 4f in the axial direction are defined. At this time, the end surfaces 6c and 7c of the main body portions 6b and 7b are integrally connected to the axial side surface 5a of the cam lobe 4a to define the non-quenched portion 5c.

位置決めブロック６ａ、７ａがカムロブ４ａを支持したら、突き当てブロック１０はカムロブ４ａの支持を終了する（図３（ｃ）、ステップＳ４）。   When the positioning blocks 6a and 7a support the cam lobe 4a, the abutting block 10 ends the support of the cam lobe 4a (FIG. 3 (c), step S4).

そして図３（ｄ）に示すように、カムロブ４ａの頂部８近傍の所定位置に高周波コイル９が設置され（ステップＳ５）、所定時間の間、高周波コイル９に通電が行われる。高周波コイル９への通電により、カムロブ４ａは急速に昇温し、高周波焼入れが開始される（ステップＳ６）。   Then, as shown in FIG. 3D, the high frequency coil 9 is installed at a predetermined position near the top 8 of the cam lobe 4a (step S5), and the high frequency coil 9 is energized for a predetermined time. The energization of the high frequency coil 9 causes the cam lobe 4a to rapidly rise in temperature, and induction hardening is started (step S6).

所定時間通電後、冷却水手段９ａの冷却液がカムロブ４ａ〜４ｆの頂部８に放出されて頂部８は急冷され、カムロブ４ａの焼入れ処理を終了する（ステップＳ７）。   After energization for a predetermined time, the coolant of the cooling water means 9a is discharged to the top 8 of the cam lobes 4a to 4f, the top 8 is rapidly cooled, and the quenching process of the cam lobe 4a is finished (step S7).

したがって、本実施形態では、エンジンのカムシャフト１の軸回りの角度基準となる基準穴５周辺を軸方向から挟持する位置決めブロック６、７を設け、位置決めブロック６、７が挟持した状態で高周波焼入れ処理をする。   Therefore, in the present embodiment, the positioning blocks 6 and 7 are provided for clamping the periphery of the reference hole 5 serving as an angle reference around the axis of the camshaft 1 of the engine from the axial direction, and induction hardening is performed with the positioning blocks 6 and 7 being sandwiched. Process.

基準穴５は、高周波焼入れ処理により硬度がアップすると仕上げ加工が困難となり、仕上げ精度の確保が難くなる。しかしながら、本実施形態では、高周波焼入れ時に基準穴５の周辺を位置決めブロック６、７により軸方向から挟持するようにしたため、挟持されたカムロブ４ａの非焼入れ部位５ｃの熱容量が他の部位より大きくなり、また冷却液が直接かかることがない。このため、非焼入れ部位５ｃの温度の冷却速度が他の部位より遅くなり、基準穴５周辺の焼入れによる硬化を抑制できる。これにより、従来技術のような溶射装置を用いることなく、高周波焼入れ後の基準穴の仕上げ加工を容易とし、仕上げ精度を容易に維持することができる。   When the hardness of the reference hole 5 is increased by induction hardening, finishing is difficult, and it is difficult to ensure finishing accuracy. However, in this embodiment, since the periphery of the reference hole 5 is clamped from the axial direction by the positioning blocks 6 and 7 during induction hardening, the heat capacity of the non-quenched portion 5c of the clamped cam lobe 4a becomes larger than other portions. In addition, the coolant is not applied directly. For this reason, the cooling rate of the temperature of the non-quenched part 5c becomes slower than other parts, and hardening by quenching around the reference hole 5 can be suppressed. Thereby, the finishing process of the reference hole after induction hardening can be facilitated and the finishing accuracy can be easily maintained without using a thermal spraying apparatus as in the prior art.

なお、本実施形態では、角度基準となる基準穴５周辺の焼入れを抑制することとしたが、これに限らず焼入れによる硬化を抑制したい部位に適用できることは言うまでもない。   In the present embodiment, the quenching around the reference hole 5 serving as the angle reference is suppressed. However, it is needless to say that the present invention is not limited to this and can be applied to a portion where hardening due to quenching is desired to be suppressed.

また、位置決めブロック６、７は、ピン６ａ、７ａが基準穴５に挿入することでカムロブ４ａ〜４ｆの軸回りの角度決めとして機能し、本体部６ｂ、７ｂがカムロブ４ａ〜４ｆの側面５ａを軸方向から挟持することでカムロブ４ａ〜４ｆの軸方向の位置決めとして機能する。このため、カムロブ４ａ〜４ｆと高周波コイル９との位置関係を一定に維持することができ、高周波焼入れの硬化層深さのバラツキを抑制することができる。   The positioning blocks 6 and 7 function as angle determinations around the cam lobes 4a to 4f when the pins 6a and 7a are inserted into the reference holes 5, and the main body portions 6b and 7b serve as the side surfaces 5a of the cam lobes 4a to 4f. By sandwiching from the axial direction, the cam lobes 4a to 4f function as axial positioning. For this reason, the positional relationship between the cam lobes 4a to 4f and the high frequency coil 9 can be maintained constant, and variations in the hardened layer depth of the induction hardening can be suppressed.

本発明は、上記した実施形態に限定されるものではなく、本発明の技術的思想の範囲内でさまざまな変更がなしうることは明白である。   The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea of the present invention.

第１の実施形態のカムシャフトの高周波焼入れの構成図である。It is a block diagram of the induction hardening of the cam shaft of 1st Embodiment. 図１の断面Ｂ−Ｂの断面図である。It is sectional drawing of the cross section BB of FIG. 第１の実施形態の高周波焼入れの手順を説明する図である。It is a figure explaining the procedure of induction hardening of 1st Embodiment. 高周波焼入れの手順を説明するフローチャートである。It is a flowchart explaining the procedure of induction hardening.

符号の説明Explanation of symbols

１ カムシャフト
２、３ スピンドル
４ａ〜４ｆ カムロブ
５ 基準穴
５ａ 側面
５ｂ カム面
５ｃ 非焼入れ部位
６、７ 位置決めブロック
６ａ、７ａ ピン
６ｂ、７ｂ 本体部
６ｃ、７ｃ 端面
８ 頂部
９ 高周波コイル
９ａ 冷却水手段
１０ 突き当てブロック DESCRIPTION OF SYMBOLS 1 Cam shaft 2, 3 Spindle 4a-4f Cam lobe 5 Reference hole 5a Side surface 5b Cam surface 5c Non-hardened part 6, 7 Positioning block 6a, 7a Pin 6b, 7b Main body part 6c, 7c End surface 8 Top part 9 High frequency coil 9a Cooling water means 10 Butting block

Claims (4)

エンジンのバルブを開閉するカムロブを備えたカムシャフトの高周波焼入れ方法であって、
前記カムロブの頂部近傍の軸方向端面をブロックにより両側から挟持し、
前記ブロックにより前記カムロブを挟持した状態で、前記カムロブを加熱する高周波コイルを設置し、
前記高周波コイルに所定時間通電後、前記カムロブを冷却液で急冷する
ことを特徴とするカムシャフトの高周波焼入れ方法。 An induction hardening method for a camshaft having a cam lobe for opening and closing an engine valve,
The axial end face near the top of the cam lobe is clamped from both sides by a block,
In a state where the cam lobe is sandwiched by the block, a high frequency coil for heating the cam lobe is installed,
A camshaft induction hardening method, comprising: energizing the high frequency coil for a predetermined time and then quenching the cam lobe with a coolant. 前記カムロブのうち少なくとも一つのカムロブに、各カムロブの軸回りの角度の基準となる軸方向の貫通孔を設け、
前記ブロックの端面は、この貫通孔を含む頂部近傍が挟持され、前記ブロックの端面から突出するピンが前記貫通孔に挿入される
ことを特徴とする請求項１に記載のカムシャフトの高周波焼入れ方法。 At least one of the cam lobes is provided with an axial through hole serving as a reference for an angle around the axis of each cam lobe,
2. The induction hardening method for a camshaft according to claim 1, wherein the end surface of the block is sandwiched in the vicinity of the top including the through hole, and a pin protruding from the end surface of the block is inserted into the through hole. . エンジンのバルブを開閉するカムロブを備えたカムシャフトの高周波焼入れ装置であって、
前記カムロブの頂部近傍の軸方向端面を両側から挟持するブロックと、
前記ブロックにより前記カムロブを挟持した状態で、前記カムロブを加熱する高周波コイルと、
前記高周波コイルに所定時間通電後、前記カムロブを冷却液で急冷する冷却水手段と
を備えたことを特徴とするカムシャフトの高周波焼入れ装置。 An induction hardening apparatus for a camshaft having a cam lobe for opening and closing an engine valve,
A block for sandwiching an axial end surface near the top of the cam lobe from both sides;
A high-frequency coil for heating the cam lobe in a state where the cam lobe is sandwiched by the block;
An induction hardening apparatus for a camshaft, comprising: cooling water means for rapidly cooling the cam lobe with a cooling liquid after energizing the high frequency coil for a predetermined time. 前記カムロブのうち少なくとも一つのカムロブに設けられ、各カムロブの軸回りの角度の基準となる軸方向の貫通孔を含む頂部近傍を挟持する前記ブロックの端面から突出し、前記貫通孔に挿入されるピンを備えた
ことを特徴とする請求項３に記載のカムシャフトの高周波焼入れ装置。 Provided in at least one of the cam lobe of said cam lobe, pin inserted from an end face of said block for clamping the near the top portion including a through hole in the axial direction as a reference of axis angle of each cam lobe protrudes into the through hole The induction hardening apparatus for a camshaft according to claim 3, comprising:
JP2005164025A 2005-06-03 2005-06-03 Induction hardening method and apparatus for camshaft Expired - Fee Related JP4618008B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005164025A JP4618008B2 (en) 2005-06-03 2005-06-03 Induction hardening method and apparatus for camshaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005164025A JP4618008B2 (en) 2005-06-03 2005-06-03 Induction hardening method and apparatus for camshaft

Publications (2)

Publication Number Publication Date
JP2006336087A JP2006336087A (en) 2006-12-14
JP4618008B2 true JP4618008B2 (en) 2011-01-26

Family

ID=37556898

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005164025A Expired - Fee Related JP4618008B2 (en) 2005-06-03 2005-06-03 Induction hardening method and apparatus for camshaft

Country Status (1)

Country Link
JP (1) JP4618008B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101886993B (en) * 2010-06-02 2012-07-11 奇瑞汽车股份有限公司 Cam shaft testing device
CN111944984B (en) * 2020-08-22 2021-07-20 河北福昊机械制造有限公司 Heat treatment method for surface of engine crankshaft

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5431005U (en) * 1977-08-04 1979-03-01
JPS58136712A (en) * 1982-02-09 1983-08-13 Mitsubishi Heavy Ind Ltd Hardening method
JPH05345911A (en) * 1992-06-12 1993-12-27 Dai Ichi High Frequency Co Ltd Partial nonhardening treatment for member to be hardened
JPH11210413A (en) * 1998-01-21 1999-08-03 Toyota Motor Corp Manufacture of camshaft, cam lobe positioning device, and camshaft manufacturing device
JP2000001720A (en) * 1998-06-17 2000-01-07 Honda Motor Co Ltd Heat treatment of metallic mold cast product
JP2003313611A (en) * 2002-04-24 2003-11-06 High Frequency Heattreat Co Ltd Process and tool for heat treatment
JP2005121056A (en) * 2003-10-14 2005-05-12 Toyota Motor Corp Connecting rod, and method and device for manufacturing connecting rod

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5431005U (en) * 1977-08-04 1979-03-01
JPS58136712A (en) * 1982-02-09 1983-08-13 Mitsubishi Heavy Ind Ltd Hardening method
JPH05345911A (en) * 1992-06-12 1993-12-27 Dai Ichi High Frequency Co Ltd Partial nonhardening treatment for member to be hardened
JPH11210413A (en) * 1998-01-21 1999-08-03 Toyota Motor Corp Manufacture of camshaft, cam lobe positioning device, and camshaft manufacturing device
JP2000001720A (en) * 1998-06-17 2000-01-07 Honda Motor Co Ltd Heat treatment of metallic mold cast product
JP2003313611A (en) * 2002-04-24 2003-11-06 High Frequency Heattreat Co Ltd Process and tool for heat treatment
JP2005121056A (en) * 2003-10-14 2005-05-12 Toyota Motor Corp Connecting rod, and method and device for manufacturing connecting rod

Also Published As

Publication number Publication date
JP2006336087A (en) 2006-12-14

Similar Documents

Publication Publication Date Title
JP4618008B2 (en) Induction hardening method and apparatus for camshaft
WO2013127143A1 (en) Cam shaft for high-pressure common-rail oil pump, manufacturing method thereof and interference assembly equipment thereof
JPH0886313A (en) Guide rail device for linear guide device
JP5060054B2 (en) Induction hardening method
JP4508473B2 (en) Induction hardening method of camshaft
US20150225805A1 (en) Single shot inductor for heat treatment of closely spaced multiple eccentric cylindrical components arranged along the longitudinal axis of a workpiece
Doyon et al. Low-distortion, high-quality induction hardening of crankshafts and camshafts
KR20130120308A (en) Manufacturing method of integrated cam shaft that includes carburized
US6903317B2 (en) Induction heating system having eccentric locator
JP6630577B2 (en) Quenching method
JP2002105532A (en) Heat treatment apparatus for deformed work
JP2004107685A (en) Method and device for induction-hardening crank shaft
JP4209227B2 (en) High frequency induction heating method and apparatus for crankshaft
JP2739421B2 (en) Induction hardening of crankshaft pins
JP2002028827A (en) Manufacturing device for long workpiece and manufacturing method for long workpiece
JPH0144770B2 (en)
JP2008075109A (en) Supporting tool for tempering-heating cylindrical member having variation of wall thickness
JP3458666B2 (en) 3D camshaft manufacturing equipment
JP3535061B2 (en) Method and apparatus for controlling quenching distortion of uneven thickness work
JPH10330833A (en) Induction hardening apparatus of cam shaft having different outline and method thereof
JP3946147B2 (en) Induction hardening method and apparatus for crankshaft
JP5377297B2 (en) Method for introducing compressive residual stress into shaft step
JP6102407B2 (en) Cam manufacturing method
JPH08325642A (en) High frequency quenching method
CN107385154B (en) Heat treatment method for cam member

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080326

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100308

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100406

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100525

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100622

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100819

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100928

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20101011

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131105

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees