JP2615462B2 - Caliper for disc brake device and method of manufacturing the same - Google Patents
Caliper for disc brake device and method of manufacturing the sameInfo
- Publication number
- JP2615462B2 JP2615462B2 JP63021725A JP2172588A JP2615462B2 JP 2615462 B2 JP2615462 B2 JP 2615462B2 JP 63021725 A JP63021725 A JP 63021725A JP 2172588 A JP2172588 A JP 2172588A JP 2615462 B2 JP2615462 B2 JP 2615462B2
- Authority
- JP
- Japan
- Prior art keywords
- caliper
- cast
- less
- disc brake
- brake device
- 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
Landscapes
- Braking Arrangements (AREA)
Description
本発明は、鋼に近い機械的特性と、鋳鉄に匹敵する被
削性を有する炭素鋳鋼を材料とする、ディスクブレーキ
装置のキャリパーに関する。The present invention relates to a caliper of a disc brake device made of carbon cast steel having mechanical properties close to steel and machinability comparable to cast iron.
自動車のディスクブレーキを構成するキャリパーは、
ディスクをはさんでブレーキパッドをつけたときに、外
側に押し拡げられる方向の応力が働らく。ブレーキの作
用を確実にするには、この応力に抗して簡単に弾性変形
しないような、剛性の大きい材料でこれをつくらなけれ
ばならない。一方で、ブレーキの破壊は大事故につなが
るから、キャリパーは十分な靭性をもつことが必要であ
るし、製造時の能率という観点からは、材料の被削性が
よいことが望まれる。 現在、自動車のディスクブレーキの部品であるキャリ
パーは、主としてダクタイル鋳鉄FCD45で製作されてい
る。一般に鋳鉄は鋼よりも被削性はよいが、機械的特性
において及ばないことは、よく知られているとおりであ
る。 最近の自動車には、高速運転時のブレーキが確実にか
かり、かつブレーキ破壊の心配がないことが要求されて
おり、これをみたすためには、鋳鉄よりも機械的特性が
すぐれた材料を用いる必要がある。The caliper that composes the disc brake of the car,
When the brake pad is applied across the disc, stress is exerted in the direction in which it is pushed outward. To ensure the action of the brake, it must be made of a rigid material that does not easily elastically deform against this stress. On the other hand, since the breakage of the brake leads to a major accident, the caliper needs to have sufficient toughness. From the viewpoint of efficiency at the time of manufacturing, it is desired that the material has good machinability. At present, calipers, which are components of automobile disc brakes, are mainly made of ductile cast iron FCD45. It is well known that cast iron generally has better machinability than steel, but does not have the same mechanical properties. Modern automobiles are required to reliably apply brakes during high-speed driving and have no fear of breaking, and in order to meet this, it is necessary to use materials that have better mechanical properties than cast iron There is.
本発明の目的は、従来の鋳鉄よりすぐれた機械的特性
を有し、しかも被削性は鋳鉄なみに高い改良された炭素
鋳鋼を材料として使用した信頼性の高いディスクブレー
キ装置のキャリパーを提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a caliper of a highly reliable disc brake device using improved carbon cast steel as a material, which has better mechanical properties than conventional cast iron and has a machinability as high as cast iron. It is in.
本発明のディスクブレーキ装置のキャリパーは、C:0.
20〜0.35％、Si:1.0〜3.5％およびMn:2.0％以下を含有
し、P:0.04％以下、S:0.1％以下であって、残部が実質
的にFeからなる組成を有する炭素鋳鋼からなる。 本発明のディスクブレーキ装置のキャリパーの製造方
法は、上記の合金組成を有する炭素鋳鋼をキャリパーの
形状に鋳造し、焼ならし処理をしたのち機械加工により
仕上げることからなる。焼ならし処理は不可欠でない
が、施すことにより、特性がさらに向上する。ただし、
被削性は鋳造ままの方が高い。焼ならしは、代表的には
860〜900℃の温度に１〜３時間保持することによって行
なう。The caliper of the disc brake device of the present invention is C: 0.
From carbon cast steel containing 20 to 0.35%, Si: 1.0 to 3.5% and Mn: 2.0% or less, P: 0.04% or less, S: 0.1% or less, and the balance substantially consisting of Fe Become. The method for manufacturing the caliper of the disc brake device according to the present invention comprises casting a cast carbon steel having the above alloy composition into a caliper shape, performing normalizing treatment, and finishing by machining. The normalizing process is not essential, but by applying it, the characteristics are further improved. However,
Machinability is higher as cast. Normalization is typically
It is carried out by maintaining the temperature at 860-900 ° C for 1-3 hours.
本発明で使用する炭素鋳鋼の合金成分のはたらきと、
組成範囲の限定理由を説明する。 C:0.20〜0.35％ 炭素の含有量が0.20％に足らない少量では、引張強さ
が不足である。 上限値の0.35％を超えると、靭性に乏しくなり、被削性
も低下する。 Si:1.0〜3.5％ Siは、湯流れをよくし、鋳造を容易にする。この効果
は1.0％未満では得られず、また被削性も低い。一定、
含有量が3.5％を超えると靭性が低下してしまう。 Mn:2.0％以下 Mnは脱散剤として添加するほか、被削性にも寄与す
る。多量に過ぎると鋼を脆くし、機械的特性を低下させ
るので、2.0％の上限を設けた。 P:0.04％以下、S:0.1％以下 これらは不純物であって、鋼を脆くするから、それぞ
れ上記の許容限度内の含有に止める。このほか、Cr,Ni
およびMoなども被削性をそこなうから、含有されるとし
ても１％以内に抑えなければならない。With the function of the alloy component of the carbon cast steel used in the present invention,
The reasons for limiting the composition range will be described. C: 0.20 to 0.35% If the carbon content is less than 0.20%, the tensile strength is insufficient. If it exceeds 0.35% of the upper limit, the toughness becomes poor and the machinability also decreases. Si: 1.0 to 3.5% Si improves the flow of molten metal and facilitates casting. This effect cannot be obtained at less than 1.0%, and the machinability is low. Constant,
If the content exceeds 3.5%, the toughness decreases. Mn: 2.0% or less Mn is added as a dispersant and contributes to machinability. An upper limit of 2.0% was set because too much would make the steel brittle and reduce mechanical properties. P: 0.04% or less, S: 0.1% or less Since these are impurities and make the steel brittle, the content is limited to the above allowable limits. In addition, Cr, Ni
Since Mo and Mo also impair machinability, even if they are contained, they must be kept within 1%.
第１表に示す組成の鋳鋼を溶製した。No.1は従来から
使用しているダクタイル鋳鉄FCD45であり、No.2は類似
の鋳鋼SC49であって、No.3〜５が本発明に従う鋳鋼であ
る。 各材料の溶湯の流動性を渦巻鋳造法により測定した。
この方法は、融点より80℃高い温度に加熱した溶湯を、
10mm角の流路が渦巻型に20mmずつ距離をおいて設けられ
たフラン鋳型に、渦巻の中心から注湯し、湯の流れた長
さを測定して、その長短で流動性を知るものである。 測定結果を第１表に併記した。本発明の炭素鋳鋼は、
既知の鋳鋼にくらべて改善された湯流れを示しており、
流動長の値は従来使用していた鋳鉄のそれに近い。 各材料について、鋳造ままおよび焼ならし後の引張試
験を行なった。結果を第２表に示す。本発明に従ってキ
ャリパーを製造すれば在来のFCD45（No.1）を材料とす
るものにくらべ、引張強度および靭性がすぐれた製品が
得られることがわかる。 次に、鋳造ままの供試材No.1,2および３、ならびに焼
ならし後のNo.3について、被削性試験を行なった。被削
性試験は、試験片をドリルで穿孔し、一定の切削長さに
対するドリル刃のコーナー摩耗を測定することによって
行なった。その結果を、添付図面に示す。試験条件は、
下記のとおりである。 工具：超硬ドリル（直径5mm） 送り:0.2mm/rev. 穴深さ:10mm（めくら穴） 切削速度:30m/min 切削油：水溶性 図面のデータからわかるように、本発明で材料として
使用する炭素鋳鋼は、鋳造ままでは従来から使用してい
る鋳鋼と同等の被削性を示す。A cast steel having the composition shown in Table 1 was melted. No. 1 is a conventionally used ductile cast iron FCD45, No. 2 is a similar cast steel SC49, and Nos. 3 to 5 are cast steels according to the present invention. The fluidity of the molten metal of each material was measured by a spiral casting method.
In this method, the molten metal heated to a temperature 80 ° C higher than the melting point is
A 10 mm square flow path is poured from the center of the spiral into a flan mold provided with a spiral mold at a distance of 20 mm from the center of the spiral, and the flow length of the hot water is measured, and the flowability is known by its length. is there. The measurement results are also shown in Table 1. Carbon cast steel of the present invention,
Shows improved melt flow compared to known cast steel,
The value of the flow length is close to that of the conventionally used cast iron. Each material was subjected to a tensile test as cast and after normalizing. The results are shown in Table 2. It can be seen that when the caliper is manufactured according to the present invention, a product having excellent tensile strength and toughness can be obtained as compared with the conventional one using FCD45 (No. 1) as a material. Next, machinability tests were performed on the test materials No. 1, 2 and 3 as cast, and No. 3 after normalization. The machinability test was performed by drilling a test piece and measuring the corner wear of the drill blade for a fixed cutting length. The results are shown in the accompanying drawings. The test conditions are
It is as follows. Tool: Carbide drill (diameter 5mm) Feed: 0.2mm / rev. Hole depth: 10mm (blind hole) Cutting speed: 30m / min Cutting oil: water soluble As can be seen from the drawing data, used as a material in the present invention The cast carbon steel shows the same machinability as cast as conventionally used cast steel.
本発明のディスク装置のキャリパーの材料となる鋳鋼
は、在来のダクタイル鋳鉄FCD45にくらべて引張特性が
すぐれており、剛性が大きい。被削性においても、この
炭素鋳鋼は、鋳鉄（FCD45）と同等の成績を示す。 このような材料を使用して製造した本発明のキャリパ
ーは、信頼性の高いものである。またこの鋳鋼は湯流れ
がよいので、鋳造作業が容易であって不良品の発生率が
低い。これは、製品単価の引下げに寄与する。The cast steel used as the material of the caliper of the disk device of the present invention has better tensile properties and higher rigidity than conventional ductile cast iron FCD45. In terms of machinability, this carbon cast steel shows the same performance as cast iron (FCD45). The caliper of the present invention manufactured using such a material is highly reliable. Further, since the cast steel has a good molten metal flow, the casting operation is easy, and the incidence of defective products is low. This contributes to a reduction in product unit price.
図面は、本発明のキャリパーの製造に使用する鋳鋼の切
削試験の結果を示すグラフである。The drawing is a graph showing the results of a cutting test of a cast steel used for manufacturing the caliper of the present invention.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−52550（ＪＰ，Ａ) 特開 昭63−435（ＪＰ，Ａ) 特開 昭50−114336（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-52550 (JP, A) JP-A-63-435 (JP, A) JP-A-50-114336 (JP, A)
Claims (2)
2.0％以下を含有し、P:0.04％以下、S:0.1％以下であっ
て、残部が実質的にFeからなる炭素鋳鋼からなるディス
クブレーキ装置のキャリパー。(1) C: 0.20 to 0.35%, Si: 1.0 to 3.5% and Mn:
A caliper for a disc brake device comprising 2.0% or less, P: 0.04% or less, S: 0.1% or less, and the balance being substantially cast iron carbon.
2.0％以下を含有し、P:0.04％以下、S:0.1％以下であっ
て、残部が実質的にFeからなる炭素鋳鋼をキャリパーの
形状に鋳造し、焼ならし処理をしたのち機械加工により
仕上げることからなるディスクブレーキ装置のキャリパ
ーの製造方法。2. C: 0.20 to 0.35%, Si: 1.0 to 3.5% and Mn:
Containing 2.0% or less, P: 0.04% or less, S: 0.1% or less, the balance is substantially cast of carbon cast steel consisting of Fe in the form of calipers, normalizing and then machining A method of manufacturing a caliper for a disc brake device, comprising finishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63021725A JP2615462B2 (en) | 1988-02-01 | 1988-02-01 | Caliper for disc brake device and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63021725A JP2615462B2 (en) | 1988-02-01 | 1988-02-01 | Caliper for disc brake device and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01198451A JPH01198451A (en) | 1989-08-10 |
| JP2615462B2 true JP2615462B2 (en) | 1997-05-28 |
Family
ID=12063056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63021725A Expired - Fee Related JP2615462B2 (en) | 1988-02-01 | 1988-02-01 | Caliper for disc brake device and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2615462B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6628999B2 (en) * | 2015-07-30 | 2020-01-15 | 株式会社リケン | Cast steel members |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50114336A (en) * | 1974-02-19 | 1975-09-08 | ||
| JPS59126760A (en) * | 1983-01-10 | 1984-07-21 | Kubota Ltd | Special cast steel for casting strain inducing body of load cell |
| JPS6052550A (en) * | 1983-08-31 | 1985-03-25 | Sumitomo Metal Ind Ltd | Steel for disc brake rotor |
| JPS62112753A (en) * | 1985-11-12 | 1987-05-23 | Toyota Motor Corp | High strength cast steel and its manufacture |
| JPS63435A (en) * | 1986-06-19 | 1988-01-05 | Nippon Steel Corp | Cast steel for brake disk excellent in resistance to linear mark |
-
1988
- 1988-02-01 JP JP63021725A patent/JP2615462B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01198451A (en) | 1989-08-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |