JPH0128816B2 - - Google Patents
Info
- Publication number
- JPH0128816B2 JPH0128816B2 JP1170484A JP1170484A JPH0128816B2 JP H0128816 B2 JPH0128816 B2 JP H0128816B2 JP 1170484 A JP1170484 A JP 1170484A JP 1170484 A JP1170484 A JP 1170484A JP H0128816 B2 JPH0128816 B2 JP H0128816B2
- Authority
- JP
- Japan
- Prior art keywords
- steering rack
- hardened
- induction hardening
- coil
- induction
- 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
- 230000006698 induction Effects 0.000 claims description 62
- 238000001816 cooling Methods 0.000 claims description 34
- 239000000498 cooling water Substances 0.000 claims description 28
- 238000002347 injection Methods 0.000 claims description 28
- 239000007924 injection Substances 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 10
- 230000005674 electromagnetic induction Effects 0.000 claims description 2
- 238000010791 quenching Methods 0.000 description 21
- 230000000171 quenching effect Effects 0.000 description 21
- 230000000694 effects Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はステアリングラツクの高周波焼入装置
に関し、詳しくは、ステアリングラツクの歯部に
高周波電流を直接通電するとともに、ステアリン
グラツクの歯部に対向させて配置された、断面凸
形状の高周波焼入コイルの突出部位に冷却ジヤケ
ツトを内蔵したステアリングラツクの高周波焼入
装置の、高周波焼入コイル突出部位の冷却水噴射
範囲幅と、被焼入ステアリングラツクの歯部幅、
および、断面凸形状高周波焼入コイルの突出部位
高さを調整することにより、被焼入ステアリング
ラツクの焼入模様を調整可能として、焼割れ，焼
ムラ発生の防止、ならびに、焼入歪の減少をはか
ることのできるステアリングラツクの高周波焼入
装置にかかる。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an induction hardening device for a steering rack, and more specifically, a high frequency current is applied directly to the teeth of the steering rack, and a high frequency current is applied directly to the teeth of the steering rack. The width of the cooling water injection range of the protruding part of the induction hardening coil and the steering to be hardened in the induction hardening apparatus for the steering rack, which has a cooling jacket built into the protruding part of the induction hardening coil with a convex cross-sectional shape, which is arranged so as to have a convex cross section. Rack tooth width,
By adjusting the height of the protruding part of the induction hardened coil with a convex cross section, the hardening pattern of the steering rack to be hardened can be adjusted, preventing the occurrence of quenching cracks and unevenness, and reducing quenching distortion. The steering rack is subjected to induction hardening equipment that can measure the temperature.
直接通電式高周波焼入は、焼入されるべき金属
部材に直接高周波電流を通電し、金属部材の表面
部のみを加熱し、ついで、これを急冷することに
より表面硬化焼入するものであり、一般に、焼入
されるべき金属部材に実質的に面接触し得るよう
に構成された２つの接触子を含み、これら接触子
と金属部材とが互に押し付けられた状態にて接触
子間に高周波電流が通電されるようになつてい
る。
Direct energization type induction hardening is a method in which a high frequency current is applied directly to the metal member to be hardened, heating only the surface of the metal member, and then rapidly cooling it to perform surface hardening. In general, it includes two contacts configured to be able to make substantially surface contact with the metal member to be hardened, and when the contacts and the metal member are pressed together, a high frequency wave is applied between the contacts. Current is being applied.
ところで、ステアリングラツクの歯部を直接通
電加熱により高周波焼入する場合においては、歯
面をその冷却水噴射口から水を噴射して急冷し焼
入する断面凸形状高周波焼入コイルの冷却ジヤケ
ツトを内蔵する突出部位の形状が悪いと、高周波
焼入部に焼割れ、焼ムラ等を発生し、さらに、焼
入歪が増大するという欠点がある。 By the way, when the teeth of the steering rack are induction hardened by direct current heating, the cooling jacket of the induction hardening coil with a convex cross section is used to rapidly cool and harden the tooth surface by injecting water from its cooling water injection port. If the shape of the built-in protruding portion is bad, there is a drawback that quenching cracks, uneven quenching, etc. occur in the induction hardened portion, and furthermore, quenching distortion increases.
即ち、
歯面をその冷却水噴射口から水を噴射して急
冷し焼入する断面凸形状高周波焼入コイルの冷
却ジヤケツトを内蔵した突出部位の冷却水噴射
範囲幅が広すぎると、被焼入ステアリングラツ
ク側面部の焼入深さが深くなり、焼割れが発生
しやすく、また、歯面をその冷却水噴射口から
水を噴射して急冷し焼入する断面凸形状高周波
焼入コイルの冷却ジヤケツトを内蔵する突出部
位の冷却水噴射範囲幅が狭すぎると、全体的に
加熱効率が落ち、しかも、被焼入ステアリング
ラツク側面部の冷却が不均一となり、冷却ムラ
を発生しやすいという欠点がある。 In other words, if the cooling water injection range of the protruding part containing the built-in cooling jacket of the induction hardening coil with a convex cross section that rapidly cools and hardens the tooth surface by injecting water from its cooling water injection port is too wide, The quenching depth of the side surface of the steering rack becomes deep and quenching cracks are likely to occur.In addition, the tooth surface is rapidly cooled and hardened by injecting water from the cooling water injection port to cool the induction hardened coil, which has a convex cross section. If the width of the cooling water injection range at the protruding part that houses the jacket is too narrow, the heating efficiency will drop overall, and the side surface of the steering rack to be hardened will not be cooled uniformly, resulting in uneven cooling. be.
また、断面凸形状高周波焼入コイルの突出部
位に、その冷却水噴射口から水を噴射してステ
アリングラツクの歯面を急冷して焼入する冷却
ジヤケツトを内蔵する断面凸形状高周波焼入コ
イルの突出部位の高さが低いと、冷却ジヤケツ
トを内蔵する突出部位のみの誘導効果が充分に
発揮できず、冷却ジヤケツトを内蔵した突出部
位取付部等からの誘導効果も、被焼入ステアリ
ングラツクに影響を及ぼし、被焼入ステアリン
グラツク側面部の高周波焼入深さが深くなり、
焼割れが発生しやすく、また、前記突出部位の
高さが高すぎると、冷却水噴射口と被焼入ステ
アリングラツクの歯部との間隔が大きくなり、
高周波焼入部の冷却ムラを生じやすいという欠
点がある。 In addition, an induction hardened coil with a convex cross section has a built-in cooling jacket that injects water from its cooling water injection port into the protruding part of the induction hardened coil with a convex cross section to rapidly cool and harden the tooth surface of the steering rack. If the height of the protruding part is low, the guiding effect of only the protruding part with a built-in cooling jacket cannot be sufficiently exerted, and the guiding effect from the protruding part mounting part with a built-in cooling jacket will also affect the steering rack to be hardened. The induction hardening depth of the side surface of the steering rack to be hardened increases.
Quenching cracks are likely to occur, and if the height of the protruding portion is too high, the distance between the cooling water injection port and the teeth of the steering rack to be quenched becomes large.
It has the disadvantage that it tends to cause uneven cooling of the induction hardened part.
本発明は、被焼入ステアリングラツクの歯部幅
に適合させて、断面凸形状高周波焼入コイルの冷
却ジヤケツトを内蔵した突出部位に、その冷却水
噴射口から水を噴射してステアリングラツクの歯
面を急冷し焼入する冷却ジヤケツトを内蔵する高
周波焼入コイル突出部位の冷却水噴射範囲幅およ
び突出部位の高さを適正に調整することにより、
被焼入ステアリングラツクの歯部全体に渡つて均
一に高周波焼入できるとともに、焼割れ、冷却ム
ラの発生の防止、ならびに、焼入歪の低減を可能
とするステアリングラツクの高周波焼入装置を提
供することを目的としている。
According to the present invention, water is injected from a cooling water injection port into a protruding portion of an induction hardened coil having a convex cross section in which a cooling jacket is built, in accordance with the tooth width of a steering rack to be hardened. By appropriately adjusting the width of the cooling water injection range of the protruding part of the induction hardening coil, which has a built-in cooling jacket that rapidly cools and hardens the surface, and the height of the protruding part,
We provide an induction hardening device for steering racks that can uniformly induction harden the entire tooth portion of the steering rack to be hardened, prevent quenching cracks and uneven cooling, and reduce hardening distortion. It is intended to.
このような目的は、本発明によれば、ステアリ
ングラツクの歯部に直接通電するとともに、ステ
アリングラツクの歯部に対向させて、冷却ジヤケ
ツトを内蔵した高周波焼入コイルを配して高周波
焼入する、ステアリングラツクの高周波焼入装置
であつて、
被焼入ステアリングラツクの歯部に対向し、か
つ、ステアリングラツクの長手方向に平行に配置
された断面凸形状の高周波焼入コイルの突出部位
に冷却ジヤケツトを内蔵し、高周波加熱時には高
周波加熱コイルとして被焼入ステアリングラツク
の歯部に電磁誘導電流を誘起させ、焼入時には内
蔵された冷却ジヤケツトの被焼入ステアリングラ
ツクに対向する部位に設けられた冷却水噴射口か
ら水を噴射して、加熱されたステアリングラツク
の歯部を急冷し焼入する前記高周波焼入コイルの
突出部位の冷却水噴射範囲幅W1を、被焼入ステ
アリングラツクの歯部幅Ｗに対し、W1／Ｗ＝1.0
〜1.2となし、かつ、前記高周波焼入コイルの突
出高さＬに対しＬ／W1＝1.0〜1.5となしたことを
特徴としたステアリングラツクの高周波焼入装置
によつて達成される。
According to the present invention, this purpose is achieved by applying electricity directly to the teeth of the steering rack, and by disposing an induction hardening coil with a built-in cooling jacket opposite the teeth of the steering rack to perform induction hardening. , an induction hardening device for steering racks, in which cooling is applied to the protruding portion of an induction hardening coil having a convex cross section, which is arranged parallel to the longitudinal direction of the steering rack and facing the teeth of the steering rack to be hardened. It has a built-in jacket, and during high-frequency heating, it is used as a high-frequency heating coil to induce an electromagnetic induction current in the teeth of the steering rack to be hardened, and during hardening, a built-in cooling jacket is installed at the part facing the steering rack to be hardened. Water is injected from the cooling water injection port to rapidly cool and harden the teeth of the heated steering rack. For part width W, W 1 /W=1.0
This is achieved by an induction hardening apparatus for a steering rack characterized in that L/W 1 is set to 1.2 to 1.2, and L/W 1 is set to 1.0 to 1.5 with respect to the protrusion height L of the induction hardened coil.
以下、添付図面に基づいて、本考案の実施例を
説明する。
Embodiments of the present invention will be described below based on the accompanying drawings.
本発明の１実施例を第１図に示す。 One embodiment of the invention is shown in FIG.
第１図の実施例は、ステアリングラツク１の直
接通電加熱による高周波焼入装置を示すもので、
断面凸形状高周波焼入コイルの突出部位に、その
冷却水噴射口７から水を噴射してステアリングラ
ツク１の歯面を急冷して焼入する冷却ジヤケツト
２を内蔵する断面凸形状高周波焼入コイルの冷却
水噴射範囲幅W1と、前記高周波焼入コイルの突
出部位高さＬを調整することにより、焼割れ、焼
ムラの発生を防止するとともに、焼入歪の低減を
図つたものである。 The embodiment shown in FIG. 1 shows an induction hardening device that uses direct current heating for a steering rack 1.
An induction hardened coil with a convex cross section and a built-in cooling jacket 2 for rapidly cooling and hardening the tooth surface of the steering rack 1 by injecting water from the cooling water injection port 7 into the protruding part of the induction hardening coil with a convex cross section. By adjusting the cooling water injection range width W1 and the height L of the protruding part of the induction hardening coil, it is possible to prevent the occurrence of quenching cracks and uneven quenching, and to reduce quenching distortion. .
即ち、被焼入ステアリングラツク１の左右セン
ターを図示されない保持治具により固定した状態
で、ユニツト全体を高周波焼入コイルの位置まで
移動させ、左右センターをアンクランプして、被
焼入ステアリングラツク１を接触子４ａ，４ｂ上
に乗せて、クランパ５で被焼入ステアリングラツ
ク１を接触子４ａ，４ｂ上に固定した後、高周波
焼入するものである。 That is, with the left and right centers of the steering rack 1 to be hardened fixed by a holding jig (not shown), the entire unit is moved to the position of the induction hardening coil, the left and right centers are unclamped, and the steering rack 1 to be hardened is fixed. The steering rack 1 is placed on the contacts 4a, 4b, and the steering rack 1 to be hardened is fixed onto the contacts 4a, 4b by the clamper 5, and then induction hardened.
この時において、ステアリングラツク１の歯面
を急冷して焼入する冷却ジヤケツト２を内蔵する
断面凸形状高周波焼入コイルの冷却水噴射範囲幅
W1が、被焼入ステアリングラツクの歯部幅Ｗに
対して、W1／Ｗ＝1.0〜1.2の範囲としないと、第
３図に示すステアリングラツク１の断面における
ａ部，ｂ部の高周波焼入深さを第４図に示すよう
に、均一な高周波焼入深さが確保できない。 At this time, the width of the cooling water injection range of the induction hardening coil having a convex cross section and incorporating the cooling jacket 2 for rapidly cooling and hardening the tooth surface of the steering rack 1.
If W 1 is not in the range of W 1 /W = 1.0 to 1.2 with respect to the tooth width W of the steering rack to be hardened, the high frequency of parts a and b in the cross section of the steering rack 1 shown in FIG. As shown in FIG. 4, a uniform induction hardening depth cannot be ensured.
即ち、W1／Ｗ＜1.0の場合には、ステアリング
ラツク１の歯面を冷却水噴射口７から水を噴射し
て急冷し焼入する冷却ジヤケツト２を内蔵する高
周波焼入コイルによる加熱効率が低下し、被焼入
ステアリングラツク１全体に渡つて高周波焼入深
さが浅くなり、しかも、被焼入ステアリングラツ
ク１側面部の冷却が不均一となつて冷却ムラを発
生しやすい。 In other words, when W 1 /W < 1.0, the heating efficiency of the induction hardening coil containing the cooling jacket 2 that rapidly cools and hardens the tooth surface of the steering rack 1 by injecting water from the cooling water injection port 7 is low. As a result, the induction hardening depth becomes shallow over the entire steering rack 1 to be hardened, and furthermore, the cooling of the side surface of the steering rack 1 to be hardened becomes uneven, which tends to cause uneven cooling.
また、W1／Ｗ＞1.2の場合には、ステアリング
ラツク１の歯面を冷却水噴射口７から水を噴射し
て急冷し焼入する冷却ジヤケツト２を内蔵する高
周波焼入コイルの誘導効果が被焼入ステアリング
ラツク１側面部に集中されるため、被焼入ステア
リングラツク１側面部の高周波焼入深さが深すぎ
て焼割れを発生しやすく、しかも、焼入歪も大き
くなりやすい。 In addition, in the case of W 1 /W>1.2, the induction effect of the induction hardening coil containing the cooling jacket 2 that rapidly cools and hardens the tooth surface of the steering rack 1 by injecting water from the cooling water injection port 7 is Since the induction hardening is concentrated on the side surface of the steering rack 1 to be hardened, the depth of induction hardening on the side surface of the steering rack 1 to be hardened is too deep, which tends to cause quenching cracks and also tends to increase quenching distortion.
また、第４図に示すように、冷却水噴射口７か
ら水を噴射してステアリングラツク１の歯面を急
冷して焼入する冷却ジヤケツト２を内蔵する断面
凸形状高周波焼入コイルの突出部位の高さＬは、
高周波焼入コイルの冷却水噴射範囲幅W1に対し
て、Ｌ／W1＝1.0〜1.5の範囲にないと、均一な高
周波焼入模様が得られない。 As shown in FIG. 4, there is also a protruding portion of an induction hardening coil having a convex cross section and incorporating a cooling jacket 2 that injects water from a cooling water injection port 7 to rapidly cool and harden the tooth surface of the steering rack 1. The height L is
If L/W 1 is not in the range of 1.0 to 1.5 with respect to the cooling water injection range width W 1 of the induction hardening coil, a uniform induction hardening pattern cannot be obtained.
即ち、Ｌ／W1＜1.0の場合には、ステアリング
ラツク１の歯面を冷却水噴射口７から水を噴射し
て急冷し焼入する冷却ジヤケツト２を内蔵する断
面凸形状高周波焼入コイルと、この高周波焼入コ
イル取付部８との誘導効果が相乗するため、被焼
入ステアリングラツク１側面部の高周波焼入深さ
が深くなりすぎ、焼割れを発生しやすく、しか
も、焼入歪も大きくなりやすい。 That is, when L/W 1 <1.0, an induction hardening coil with a convex cross section and a cooling jacket 2 that injects water from the cooling water injection port 7 to rapidly cool and harden the tooth surface of the steering rack 1 is used. Since the induction effect with the induction hardened coil mounting portion 8 is synergistic, the induction hardening depth of the side surface of the steering rack 1 to be hardened becomes too deep, which tends to cause quenching cracks and also cause quenching distortion. It tends to get bigger.
一方、Ｌ／W1＞1.5の場合には、冷却水噴射口
７と被焼入ステアリングラツク１の間隔が広くな
るため、冷却ムラを発生しやすい。 On the other hand, when L/W 1 >1.5, the distance between the cooling water injection port 7 and the steering rack to be hardened 1 becomes wide, which tends to cause uneven cooling.
そこで、この実施例では、ステアリングラツク
１の歯面を冷却水噴射口７から水を噴射して急冷
し焼入する冷却ジヤケツト２を内蔵する高周波焼
入コイルの冷却水噴射範囲幅W1を16mm（W1／Ｗ
＝1.03）、高周波焼入コイルの突出部位の高さＬ
を20mm（Ｌ／W1＝1.25）として、高周波焼入す
ることにより、焼割れ、焼ムラの発生を防止し、
しかも、焼入歪を減少させることができた。 Therefore, in this embodiment, the cooling water injection range width W 1 of the induction hardening coil incorporating the cooling jacket 2 that rapidly cools and hardens the tooth surface of the steering rack 1 by jetting water from the cooling water injection port 7 is set to 16 mm. (W 1 /W
= 1.03), height L of the protruding part of the induction hardened coil
is 20mm (L/W 1 = 1.25) and induction hardened to prevent quenching cracks and uneven quenching.
Furthermore, quenching distortion could be reduced.
以上により明らかなように、本発明にかかるス
テアリングラツクの高周波焼入装置によれば、被
焼入ステアリングラツクの歯部幅に適合させて、
断面凸形状高周波焼入コイルの突出部位に、その
冷却水噴射口から水を噴射してステアリングラツ
クの歯面を急冷して焼入する冷却ジヤケツトを内
蔵する高周波焼入コイルの冷却水噴射範囲幅およ
び突出部位の高さを適正に調整することにより、
被焼入ステアリングラツクの歯部全体に渡つて均
一に高周波焼入できるとともに、焼割れ、冷却ム
ラの発生の防止、ならびに、焼入歪の低減を可能
とすることができる利点がある。
As is clear from the above, according to the steering rack induction hardening apparatus according to the present invention, the steering rack can be hardened by adjusting the width of the tooth part of the steering rack to be hardened.
Cooling water injection range width of an induction hardened coil that has a built-in cooling jacket that rapidly cools and hardens the tooth surface of the steering rack by jetting water from its cooling water injection port onto the protruding part of the induction hardening coil with a convex cross-section. By appropriately adjusting the height of the protruding part,
This method has the advantage of being able to uniformly induction harden the entire tooth portion of the steering rack to be hardened, as well as preventing the occurrence of quenching cracks and uneven cooling, and reducing quenching distortion.
第１図は、本発明の１実施例を示す平面図、第
２図は、本発明の１実施例を示す正面断面図、第
３図は、ステアリングラツクの横断面図、第４図
は、高周波焼入コイルの冷却水噴射範囲幅W1と
高周波焼入コイルの突出高さＬによる高周波焼入
深さへの影響を示す図である。
１……被焼入ステアリングラツク、２……冷却
ジヤケツト、３……絶縁板、４ａ，４ｂ……接触
子、５……クランパ、６……冷却水供給口、７…
…冷却噴射口、８……取付部、ａ……ステアリン
グラツク中央部、ｂ……ステアリングラツク側面
部。
FIG. 1 is a plan view showing one embodiment of the present invention, FIG. 2 is a front cross-sectional view showing one embodiment of the present invention, FIG. 3 is a cross-sectional view of the steering rack, and FIG. FIG. 3 is a diagram showing the influence of the cooling water injection range width W 1 of the induction hardening coil and the protrusion height L of the induction hardening coil on the induction hardening depth. DESCRIPTION OF SYMBOLS 1... Steering rack to be hardened, 2... Cooling jacket, 3... Insulating plate, 4a, 4b... Contact, 5... Clamper, 6... Cooling water supply port, 7...
...Cooling injection port, 8...Mounting part, a...Steering rack center part, b...Steering rack side part.
Claims (1)
ともに、ステアリングラツクの歯部に対向させ
て、冷却ジヤケツトを内蔵した高周波焼入コイル
を配して高周波焼入する、ステアリングラツクの
高周波焼入装置であつて、 被焼入ステアリングラツクの歯部に対向し、か
つ、ステアリングラツクの長手方向に平行に配置
された断面凸形状の高周波焼入コイルの突出部位
に冷却ジヤケツトを内蔵し、高周波加熱時には高
周波加熱コイルとして被焼入ステアリングラツク
の歯部に電磁誘導電流を誘起させ、焼入時には内
蔵された冷却ジヤケツトの被焼入ステアリングラ
ツクに対向する部位に設けられた冷却水噴射口か
ら水を噴射して、加熱されたステアリングラツク
の歯部を急冷し、焼入する前記高周波焼入コイル
の突出部位の冷却水噴射範囲幅W1を、被焼入ス
テアリングラツクの歯部幅Ｗに対し、W1／Ｗ＝
1.0〜1.2となし、かつ、前記高周波焼入コイルの
突出部位高さＬに対しＬ／W1＝1.0〜1.5となした
ことを特徴としたステアリングラツクの高周波焼
入装置。[Scope of Claims] 1. High-frequency heating of the steering rack, in which the teeth of the steering rack are directly energized, and an induction hardening coil with a built-in cooling jacket is placed opposite the teeth of the steering rack for induction hardening. The hardening device has a cooling jacket built into a protruding part of an induction hardening coil having a convex cross section, which faces the teeth of the steering rack to be hardened and is arranged parallel to the longitudinal direction of the steering rack. During high-frequency heating, an electromagnetic induction current is induced in the teeth of the steering rack to be hardened as a high-frequency heating coil, and during hardening, a cooling water injection port is provided at the part of the built-in cooling jacket facing the steering rack to be hardened. Water is injected to rapidly cool and harden the heated teeth of the steering rack.The cooling water injection range width W1 of the protruding portion of the induction hardening coil is set to the width W of the teeth of the steering rack to be hardened. On the other hand, W 1 /W=
1.0 to 1.2, and L/W 1 =1.0 to 1.5 with respect to the height L of the protruding portion of the induction hardening coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1170484A JPS60155617A (en) | 1984-01-24 | 1984-01-24 | High frequency hardening device for steering rack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1170484A JPS60155617A (en) | 1984-01-24 | 1984-01-24 | High frequency hardening device for steering rack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60155617A JPS60155617A (en) | 1985-08-15 |
| JPH0128816B2 true JPH0128816B2 (en) | 1989-06-06 |
Family
ID=11785429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1170484A Granted JPS60155617A (en) | 1984-01-24 | 1984-01-24 | High frequency hardening device for steering rack |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60155617A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070246135A1 (en) * | 2004-08-18 | 2007-10-25 | Pollard Kennth Brian T | Method of Manufacturing a Hardened Forged Steel Component |
| KR100780841B1 (en) | 2006-06-23 | 2007-11-29 | 주식회사 엠에스 오토텍 | A press-type jig device for local heat treatment |
-
1984
- 1984-01-24 JP JP1170484A patent/JPS60155617A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60155617A (en) | 1985-08-15 |
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