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JPH07233826A - Brake disc manufacturing method - Google Patents

Brake disc manufacturing method

Info

Publication number
JPH07233826A
JPH07233826A JP31990394A JP31990394A JPH07233826A JP H07233826 A JPH07233826 A JP H07233826A JP 31990394 A JP31990394 A JP 31990394A JP 31990394 A JP31990394 A JP 31990394A JP H07233826 A JPH07233826 A JP H07233826A
Authority
JP
Japan
Prior art keywords
brake disc
passivation film
corrosion resistance
brake
raw material
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.)
Pending
Application number
JP31990394A
Other languages
Japanese (ja)
Inventor
Atsushi Tenkou
篤志 天孝
Shinsuke Mochizuki
信介 望月
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.)
Honda Motor Co Ltd
Original Assignee
Honda 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 Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP31990394A priority Critical patent/JPH07233826A/en
Publication of JPH07233826A publication Critical patent/JPH07233826A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To efficiently manufacture a brake disc having excellent corrosion resistance by producing a brake disc-shaped raw material through machining a steel plate, and heat-treating and surface-treating the raw material to form a passivation film. CONSTITUTION:Raw material 1 is manufactured in a brake disc-shape by stamping a chrome system stainless steel plate, and a brake disc attaching domain A, to a wheel is provided on the inner peripheral sides of both the faces of the brake disc, and a brake pad slide-friction domain A. is provided on the outer peripheral sides of both its faces, and a plurality of bolt inserting through holes 2 and a plurality of through holes 31, 32 for improving cooling efficiency are bored on the above domains. The following hardening process is carried out for improving the strength of the brake disc. The strain of the brake disc is removed by a grinding process after heat-treatment, and the brake disc is then surface-treated to wholly form a passivation film 4. Thus the brake disc 5 is manufactured. The surface treatment is composed of a degreasing process, a scale removing process, a smut removing process, a pickling process, a chemical polishing process and a drying process, and the passivation film 4 is formed at the same time as polishing. Thus the brake disc can be improved in corrosion resistance and efficiently manufactured.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、主として自動二輪車等
の車両に用いられるブレーキディスクの製造方法に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a brake disc mainly used for vehicles such as motorcycles.

【0002】[0002]

【従来の技術】従来、この種ブレーキディスクとして、
ブレーキディスク形状を有する鋼板製素材の車輪への取
付領域に塗膜を設け、ブレーキパッド摺擦領域を素材金
属面としたものが知られている。
2. Description of the Related Art Conventionally, as this kind of brake disc,
It is known that a steel plate material having a brake disc shape is provided with a coating film on a mounting area to a wheel, and a brake pad sliding area is a material metal surface.

【0003】このブレーキディスクの製造に当っては、
鋼板にプレス加工等の機械加工を施してブレーキディス
ク形状の素材を得る工程と、その素材に焼入れ処理等の
熱処理を施す工程と、ショットブラストを含む塗装処理
を行って素材全体に塗膜を形成する工程と、ブレーキパ
ッド摺擦領域を覆う塗膜を研削加工により除去して素材
金属面を露出させる工程とが用いられる。
In manufacturing this brake disc,
Forming a coating film on the entire material by performing a mechanical process such as press working on a steel plate to obtain a brake disc-shaped material, a step of subjecting the material to heat treatment such as quenching, and a coating process including shot blasting And a step of exposing the material metal surface by removing the coating film covering the brake pad rubbing region by grinding.

【0004】一般に鋼板、例えばクロム系ステンレス鋼
板表面は不動態皮膜により覆われているため、その耐食
性が保持されているが、これに、前記のような機械加工
および熱処理を施すと、不動態皮膜が破壊され、またそ
の皮膜の自然再生は殆ど望めないことから耐食性が著し
く低下する。これに対処するため、従来法では塗装処理
を採用している。
Generally, the surface of a steel sheet, for example, a chrome-based stainless steel sheet, is covered with a passivation film, so that its corrosion resistance is maintained. However, when it is subjected to the above-described machining and heat treatment, the passivation film is formed. Is destroyed, and the natural regeneration of the film is hardly expected, so the corrosion resistance is significantly reduced. In order to deal with this, the conventional method uses a coating process.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、従来法
により得られたブレーキディスクにおいては、ブレーキ
パッド摺擦領域を、実際にブレーキパッドが摺擦する実
領域よりもやや広くとっているため、実領域はブレーキ
操作の繰返しによって光沢金属面を維持しているが、そ
の実領域と取付領域の塗膜との間に存する素材金属面
は、何等耐食処理を施されていないので経時的に腐食す
る、といった問題がある。
However, in the brake disc obtained by the conventional method, the brake pad rubbing area is set to be slightly larger than the actual area on which the brake pad actually rubs. Maintains a glossy metal surface by repeated braking operations, but the material metal surface that exists between the actual area and the coating film of the mounting area is not corroded, so it corrodes over time. There's a problem.

【0006】また冷却効率の向上、軽量化等を狙ってブ
レーキパッド摺擦領域には複数の透孔や溝が開口してお
り、それら透孔等の内面には塗膜が形成されているが、
前記研削加工によって透孔等の開口縁の塗膜が除去さ
れ、またその開口縁はブレーキパッドと摺擦しない、と
いうこともあって、その開口縁が腐食する、といった問
題もある。
In order to improve the cooling efficiency and reduce the weight, a plurality of through holes or grooves are opened in the brake pad rubbing area, and a coating film is formed on the inner surface of these through holes or the like. ,
There is also a problem that the coating on the opening edge such as a through hole is removed by the grinding process, and the opening edge does not rub against the brake pad, so that the opening edge is corroded.

【0007】さらに、前記研削加工においては、砥石車
が塗料による目詰りを発生し易いので、頻繁にドレッシ
ングを行わなければならず、生産能率を向上させる上で
支障を来たしている。
Further, in the above grinding process, since the grinding wheel is apt to be clogged with the paint, dressing must be performed frequently, which is an obstacle to improving the production efficiency.

【0008】本発明は前記に鑑み、優れた耐食性を有す
るブレーキディスクを能率良く生産することのできる前
記製造方法を提供することを目的とする。
In view of the above, it is an object of the present invention to provide the above manufacturing method capable of efficiently manufacturing a brake disc having excellent corrosion resistance.

【0009】[0009]

【課題を解決するための手段】本発明に係るブレーキデ
ィスクの製造方法は、鋼板に機械加工を施してブレーキ
ディスク形状の素材を得る工程と、その素材に熱処理を
施す工程と、前記素材に表面処理を施して不動態皮膜を
形成する工程とを用いることを特徴とする。
A method of manufacturing a brake disc according to the present invention comprises a step of machining a steel plate to obtain a brake disc-shaped material, a step of heat-treating the material, and a surface of the material. And a step of forming a passivation film by applying a treatment.

【0010】[0010]

【作用】鋼板の表面に存在する不動態皮膜は、前記機械
加工および熱処理の両工程によって破壊され、したがっ
て両工程を経た素材は低耐食性である。
The passivation film present on the surface of the steel sheet is destroyed by both the machining and heat treatment steps, and therefore the material that has undergone both steps has low corrosion resistance.

【0011】そこで、次工程において、素材に表面処理
を施して不動態皮膜を形成するもので、これにより優れ
た耐食性を有するブレーキディスクを得ることができ
る。
Therefore, in the next step, the material is subjected to a surface treatment to form a passivation film, whereby a brake disc having excellent corrosion resistance can be obtained.

【0012】[0012]

【実施例】図1,2において、自動二輪車に用いられる
ブレーキディスク用素材1は、クロム系ステンレス鋼板
にプレス加工等の機械加工を施してブレーキディスク形
状を有するように製作されたものである。素材1は、環
状板形をなし、その両面内周側に車輪への取付領域A1
を、また両面外周側にブレーキパッド摺擦領域A2をそ
れぞれ有する。取付領域A1 に複数のボルト挿通孔2
と、冷却効率向上等のための複数の透孔31 とが開口
し、またブレーキパッド摺擦領域A2 には同様の目的で
複数の透孔32 が開口している。
1 and 2, a brake disc material 1 used in a motorcycle is manufactured by subjecting a chromium-based stainless steel plate to mechanical processing such as pressing to have a brake disc shape. The material 1 has an annular plate shape, and has a wheel mounting area A 1 on both inner peripheral sides thereof.
And brake pad rubbing areas A 2 on both outer peripheral sides. Plural bolt insertion holes 2 in the mounting area A 1
When, a plurality of through holes 3 1 and has openings for such cooling efficiency, and a plurality of through holes 3 2 for a similar purpose to the brake pads rubbing area A 2 is opened.

【0013】前記素材1には、次工程で、熱処理として
の焼入れ処理が施される。この焼入れ処理は、プレス加
工等を容易にするため鋼板が焼なまし状態にあるので、
素材1の強度向上のためになされる。焼入れ処理条件
は、980〜1100℃に数秒間高周波加熱し、その後
急冷である。
In the next step, the material 1 is subjected to a quenching treatment as a heat treatment. In this quenching process, since the steel plate is in an annealed state in order to facilitate press working etc.,
This is done to improve the strength of the material 1. The quenching conditions are high-frequency heating at 980 to 1100 ° C. for several seconds, and then rapid cooling.

【0014】熱処理後の素材1には、次工程で研削加工
が施され、これにより熱処理工程で素材1に生じた歪が
除去される。
After the heat treatment, the material 1 is subjected to a grinding process in the next step to remove the strain generated in the material 1 in the heat treatment step.

【0015】研削加工後の素材1には次工程で、次のよ
うな表面処理が施され、図3に示すように素材1の各透
孔31 ,32 内面および各ボルト挿通孔2内面を含む全
体に不動態皮膜4が形成され、これによりブレーキディ
スク5が得られる。
After the grinding process, the material 1 is subjected to the following surface treatment in the next step, and as shown in FIG. 3, the inner surfaces of the through holes 3 1 and 3 2 and the inner surface of the bolt insertion hole 2 of the material 1 are processed. The passivation film 4 is formed on the entire surface including the above, whereby the brake disc 5 is obtained.

【0016】表面処理としては、基本的には3つの方法
の何れか1つが採用される。
As the surface treatment, any one of the three methods is basically adopted.

【0017】第1法は、脱脂工程と、スケール除去工程
と、スマット除去工程と、酸洗い工程と、化学研磨工程
と、乾燥工程とよりなり、脱脂工程から化学研磨工程ま
での各工程後水洗いが行われる。
The first method comprises a degreasing step, a scale removing step, a smut removing step, a pickling step, a chemical polishing step, and a drying step. Each step from the degreasing step to the chemical polishing step is followed by washing with water. Is done.

【0018】前記化学研磨工程において研磨と同時に不
動態皮膜4の形成が行われる。この不動態皮膜4は耐食
性を有する皮膜であり、半光沢を有する意匠性の優れた
ものである。
In the chemical polishing step, the passivation film 4 is formed simultaneously with polishing. This passivation film 4 is a film having corrosion resistance and has semi-gloss and excellent designability.

【0019】第2法は、脱脂工程と、スケール除去工程
と、スマット除去工程と、1次酸洗い工程と、電解研磨
工程と、2次酸洗い工程と、乾燥工程とよりなり、脱脂
工程から2次酸洗い工程までの各工程後水洗いが行われ
る。
The second method comprises a degreasing step, a scale removing step, a smut removing step, a primary pickling step, an electrolytic polishing step, a secondary pickling step, and a drying step. Water washing is performed after each step up to the secondary pickling step.

【0020】前記2次酸洗い工程において不動態皮膜4
の形成が行われる。この不動態皮膜4は耐食性を有する
皮膜であり、半光沢または光沢を有する意匠性の優れた
ものである。前記電解研磨処理時間を短く設定すると、
ブレーキディスク5は半光沢となり、一方、前記時間を
長く設定すると、光沢を有する。
In the second pickling step, the passivation film 4
Is formed. The passivation film 4 is a film having corrosion resistance and has semi-gloss or luster and is excellent in design. If the electrolytic polishing time is set short,
The brake disc 5 becomes semi-gloss, while it has gloss when the time is set longer.

【0021】第3法は、電解脱脂工程と、電解研磨工程
と、スマット除去工程(前記同様の電解脱脂工程によ
る)と、電解クロメート工程と、乾燥工程とよりなり、
電解脱脂工程から電解クロメート工程までの各工程後水
洗いが行われる。
The third method comprises an electrolytic degreasing step, an electrolytic polishing step, a smut removing step (by the same electrolytic degreasing step as described above), an electrolytic chromate step, and a drying step.
Water washing is performed after each step from the electrolytic degreasing step to the electrolytic chromate step.

【0022】前記電解クロメート工程において不働態皮
膜4の形成が行われる。この不働態皮膜は優れた被覆性
と耐食性を備え、また無色透明で光沢を有し、優れた意
匠性を持つ。
The passivation film 4 is formed in the electrolytic chromate process. This passivation film has excellent coverage and corrosion resistance, is colorless and transparent, has gloss, and has excellent designability.

【0023】このような表面処理は、従来のショットブ
ラストを含む塗装処理、それに次ぐ研削加工を行う場合
に比べて低コストであり、また不動態皮膜4は塗膜に比
べて優れた耐食性、耐久性、耐剥離性および意匠性を有
する。
Such a surface treatment is lower in cost than the conventional coating treatment including shot blasting and the subsequent grinding process, and the passivation film 4 has better corrosion resistance and durability than the coating film. And has peeling resistance and design.

【0024】以下、具体例について説明する。A specific example will be described below.

【0025】13クロム鋼板を用い、プレス工程、10
00℃に数秒間高周波加熱した後急冷の焼入れ工程およ
び研削工程を行ってブレーキディスク形状の素材1を製
作し、その素材1に第1法、第2法または第3法の表面
処理を施してブレーキディスク5を得た。
Using a 13-chromium steel plate, the pressing process, 10
After high-frequency heating to 00 ° C for several seconds, quenching and grinding steps of quenching are performed to produce a brake disc-shaped material 1, and the material 1 is subjected to surface treatment by the first method, the second method, or the third method. I got a brake disc 5.

【0026】表面処理の第1〜第3法における各工程の
条件は表1〜3の通りである。
Tables 1 to 3 show the conditions of each step in the first to third methods of surface treatment.

【0027】[0027]

【表1】 [Table 1]

【0028】[0028]

【表2】 [Table 2]

【0029】[0029]

【表3】 第1法を経て得られたブレーキディスク5は半光沢であ
った。また第2法を経て得られたブレーキディスク5に
おいて、電解研磨工程の処理時間を5分間に設定された
ブレーキディスク5は半光沢であったが、前記処理時間
を15分間に設定されたブレーキディスク5は光沢を有
していた。さらに第3法を経て得られたブレーキディス
ク5は光沢を有していた。
[Table 3] The brake disc 5 obtained through the first method was semi-glossy. Further, in the brake disc 5 obtained through the second method, the brake disc 5 whose treatment time in the electrolytic polishing step was set to 5 minutes was semi-gloss, but the treatment time was set to 15 minutes. 5 had gloss. Further, the brake disc 5 obtained through the third method had gloss.

【0030】これらブレーキディスク5について、日本
工業規格(JIS)に定められた塩水噴霧試験を行った
ところ、48時間後においても赤錆の発生は認められな
かった。
The brake discs 5 were subjected to a salt spray test specified by Japanese Industrial Standards (JIS), and no red rust was observed even after 48 hours.

【0031】なお、前記製造工程において、前記研削加
工を表面処理後に行ってもよく、また意匠効果を狙っ
て、サンドブラストまたはショットブラストを、熱処理
後で研削加工前に、または熱処理後で表面処理前に行う
こともある。さらに前記第1法において、化学研磨工程
後、前記2次酸洗い工程と同様の工程を行って不動態皮
膜4の耐食性効果を高めることもある。
In the manufacturing process, the grinding process may be performed after the surface treatment, and sandblasting or shot blasting may be performed after the heat treatment and before the grinding process or after the heat treatment and before the surface treatment for the purpose of design effect. There are also things to do. Further, in the first method, after the chemical polishing step, a step similar to the secondary pickling step may be performed to enhance the corrosion resistance effect of the passivation film 4.

【0032】[0032]

【発明の効果】本発明によれば、比較的簡単な方法を採
用することによって、優れた耐食性を有する不動態皮膜
を備えたブレーキディスクを能率良く生産することがで
きる。
According to the present invention, by adopting a relatively simple method, it is possible to efficiently produce a brake disc provided with a passivation film having excellent corrosion resistance.

【図面の簡単な説明】[Brief description of drawings]

【図1】ブレーキディスク用素材の正面図である。FIG. 1 is a front view of a material for a brake disc.

【図2】図1の2−2線拡大断面図である。FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG.

【図3】ブレーキディスクの要部断面図で、図2に対応
する。
FIG. 3 is a cross-sectional view of a main part of a brake disc, which corresponds to FIG. 2.

【符号の説明】[Explanation of symbols]

1 素材 4 不動態皮膜 5 ブレーキディスク 1 Material 4 Passive film 5 Brake disc

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 鋼板に機械加工を施してブレーキディス
ク形状の素材(1)を得る工程と、その素材(1)に熱
処理を施す工程と、前記素材(1)に表面処理を施して
不動態皮膜(4)を形成する工程とを用いることを特徴
とするブレーキディスクの製造方法。
1. A step of machining a steel plate to obtain a brake disc-shaped material (1), a step of subjecting the material (1) to a heat treatment, and a surface treatment of the material (1) to passivate the material. And a step of forming a coating film (4).
JP31990394A 1993-12-28 1994-12-22 Brake disc manufacturing method Pending JPH07233826A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31990394A JPH07233826A (en) 1993-12-28 1994-12-22 Brake disc manufacturing method

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP5-338040 1993-12-28
JP33804093 1993-12-28
JP31990394A JPH07233826A (en) 1993-12-28 1994-12-22 Brake disc manufacturing method

Publications (1)

Publication Number Publication Date
JPH07233826A true JPH07233826A (en) 1995-09-05

Family

ID=26569872

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31990394A Pending JPH07233826A (en) 1993-12-28 1994-12-22 Brake disc manufacturing method

Country Status (1)

Country Link
JP (1) JPH07233826A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6613166B2 (en) 2000-03-24 2003-09-02 Edelstahl Werke Buderus Ag Method for producing brake disks for motor vehicles
CN114434098A (en) * 2021-12-31 2022-05-06 江苏方意汽车配件制造股份有限公司 Efficient disc production method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6613166B2 (en) 2000-03-24 2003-09-02 Edelstahl Werke Buderus Ag Method for producing brake disks for motor vehicles
CN114434098A (en) * 2021-12-31 2022-05-06 江苏方意汽车配件制造股份有限公司 Efficient disc production method

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