JP2530110B2 - Method for manufacturing pad backing for disc brake - Google Patents
Method for manufacturing pad backing for disc brakeInfo
- Publication number
- JP2530110B2 JP2530110B2 JP6111337A JP11133794A JP2530110B2 JP 2530110 B2 JP2530110 B2 JP 2530110B2 JP 6111337 A JP6111337 A JP 6111337A JP 11133794 A JP11133794 A JP 11133794A JP 2530110 B2 JP2530110 B2 JP 2530110B2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- recess
- metal
- friction material
- trace
- 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
【０００１】[0001]
【産業上の利用分野】この発明は、車輌等に用いるディ
スクブレーキのパッドアッセンブリ用の裏金、中でも、
摩擦材の脱落防止のための凹部を設ける裏金を、簡単な
方法で信頼性に優れる状態に作り得るようにしたパッド
裏金の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back metal for a pad assembly of a disc brake used in a vehicle, etc.
The present invention relates to a method of manufacturing a pad backing metal, wherein a backing metal having a recess for preventing the friction material from falling off can be formed in a highly reliable state by a simple method.
【０００２】[0002]
【従来の技術】ディスクブレーキ用パッドアッセンブリ
における摩擦材と裏金の接合は、万一、機械的強度、接
着強度の低下があっても制動力開放時に振動等で摩擦材
が脱落しないようにしておく必要がある。2. Description of the Related Art The joining of a friction material and a back metal in a disc brake pad assembly should be such that the friction material does not fall off due to vibration or the like when the braking force is released even if the mechanical strength and the adhesive strength are lowered. There is a need.
【０００３】そのため、一般的には図４のように、裏金
１にモールド孔４と称する比較的大きな貫通孔を設け、
その孔に摩擦材２の一部を入り込ませているが、この構
造は、モールド孔４を通って摩擦材の内部に水分が浸
透し易く、接着面（３は接着剤）に錆を誘発し、接着力
低下や摩擦材の孔充填部の割れ等を早める。摩擦材の
裏金上での加圧成形時にモールド孔周辺の圧力分布が乱
れるため摩擦材の物理的性質が各部で一定せず、摩擦特
性が変動すると云う欠点がある。Therefore, generally, as shown in FIG. 4, a relatively large through hole called a mold hole 4 is provided in the back metal 1,
Although a part of the friction material 2 is made to enter the hole, this structure allows water to easily penetrate into the friction material through the mold hole 4 and induces rust on the adhesive surface (3 is an adhesive). Accelerate the deterioration of adhesive strength and cracks in the hole filling part of the friction material. Since the pressure distribution around the mold hole is disturbed during pressure molding of the friction material on the backing metal, there is a drawback that the physical properties of the friction material are not constant in each part, and the friction characteristics vary.
【０００４】また、図５に示すように、裏金１に突出長
さが摩擦材の摩耗限界内にある小突起５を一体に設け、
これを摩擦材中に入り込ませて機械的な引掛かりとする
ものもある。しかし、これは誤って摩耗限界を越えて使
用した場合、ディスク摺動面に傷溝を発生させる。Further, as shown in FIG. 5, a small protrusion 5 having a protruding length within the wear limit of the friction material is integrally provided on the back metal 1,
There is also one in which this is caught in the friction material and used as a mechanical catch. However, this mistakenly causes scratches on the sliding surface of the disk when used beyond the wear limit.
【０００５】さらに、図６に示すように、裏金１にハー
フシャー加工による凹部６を形成し、この中に摩擦材を
入り込ませて接合するものも考えられているが、これ
は、ハーフシャーによって裏金背面に打出された突起７
がパッドアッセンブリ交換時にキャリパやピストンと干
渉し、従って、ピストン軸方向に干渉回避のための余分
なスペースが必要であり、ブレーキの大型化、複雑化を
招く。Further, as shown in FIG. 6, it is considered that a recess 6 is formed on the backing metal 1 by half shearing, and a friction material is allowed to enter into the recessed portion 6 for joining. Protrusion 7 stamped on the back of the back metal
Interferes with the caliper and the piston when the pad assembly is replaced, and therefore an extra space is required in the axial direction of the piston to avoid interference, resulting in an increase in size and complexity of the brake.
【０００６】そこで、図６（ｂ）の打出し突起７を無く
して図７の如き形状にすることが望まれる。ところが、
この形状には次の問題が伴う。Therefore, it is desired to eliminate the embossing projections 7 of FIG. 6 (b) and form the shape as shown in FIG. However,
This shape has the following problems.
【０００７】[0007]
【発明が解決しようとする課題】図７のような形状とな
すために凹部６を切削加工したり、ハーフシャー加工後
に背面の打出し突起を削り取ったりすると加工の手間が
増加する。If the concave portion 6 is cut to form the shape as shown in FIG. 7 or the punching projection on the back surface is shaved off after the half shear processing, the time and labor required for the processing increases.
【０００８】また、別法として単純な塑性鍛造で凹部を
作ろうとすると、 膨大なプレス圧力が必要、 鍛造時に展延する裏金余材が凹部の周囲に盛り上が
り、裏金を歪ませるのでその修正加工が必要、 金型の損耗が著しい、と云った問題が生じ、実用的
でない。[0008] As an alternative method, if an attempt is made to make a recess by simple plastic forging, a huge press pressure is required, and the back metal surplus material that spreads during forging rises around the recess and distorts the back metal. It is not practical because it causes the problem that the mold is worn out significantly.
【０００９】また、特開昭６０−２３６４４号公報は、
裏金と間雑材間にガス抜き孔を有する薄板状の金属イン
サート部材を介在することにより、摩擦材の裏金貫通孔
部に納まる部分の圧縮密度低下を防止して摩擦材接合面
への水分浸透を抑えることを開示しているが、この方法
を採ると製造工数増で生産性が悪くなり、また、金属イ
ンサートの使用で製造コストも上昇する。また、金属イ
ンサートにガス抜き孔があるため水分の浸透も完全には
止まらない。Further, Japanese Patent Laid-Open No. 60-23644 discloses
By interposing a thin plate-shaped metal insert member having a gas vent hole between the back metal and the miscellaneous material, it is possible to prevent the compression density from decreasing in the part of the friction material that is accommodated in the through hole of the back metal, and to permeate water into the friction material joint surface. However, if this method is adopted, productivity will be deteriorated due to an increase in the number of manufacturing steps, and the manufacturing cost will be increased due to the use of the metal insert. In addition, the permeation of water does not completely stop because the metal insert has a vent hole.
【００１０】そこで、この発明は、上記の諸問題を解決
するのに有効なパッド裏金の製造方法を提供しようとす
るものである。Therefore, the present invention is intended to provide a method for manufacturing a pad backing metal which is effective in solving the above-mentioned problems.
【００１１】[0011]
【課題を解決するための手段】この発明のパッド裏金の
製造方法は、貫通孔を設けた裏金ブランクの前面に摩擦
材の一部が埋め込まれる凹部を塑性鍛造して形成し、そ
の凹部を前記貫通孔を包含する領域に設けることにより
鍛造時に展延する余材を前記貫通孔に流入させて当該孔
を圧壊し、さらに、その後、凹部の底面又はこれとは反
対側のブランク背面の孔痕跡存在部に凹部径よりも小径
の窪みを印圧成形して凹部中央に残る孔の跡を完全に閉
塞するところに、特徴を有するものである。According to the method of manufacturing a pad backing metal of the present invention, a recess in which a part of a friction material is embedded is formed by plastic forging in the front surface of a backing metal blank having a through hole, and the recess is formed as described above. By providing in the region including the through hole, the surplus material that expands during forging is caused to flow into the through hole to crush the hole, and then the trace of the hole on the bottom surface of the recess or the blank rear surface on the opposite side to the bottom surface of the recess. This method is characterized in that a depression having a diameter smaller than the diameter of the recess is formed by pressure molding in the existing portion to completely close the trace of the hole remaining in the center of the recess.
【００１２】[0012]
【作用】凹部の塑性鍛造時に展延する裏金余材は、裏金
に設けた貫通孔を自由面としてこの自由面側に逃げる。
そのため、プレス圧力が低減され、裏金前面への肉の盛
り上がりも防止される。[Function] The surplus metal of the back metal, which is expanded during the plastic forging of the recess, escapes to the free surface side with the through hole provided in the back metal as the free surface.
Therefore, the pressing pressure is reduced and the meat is prevented from rising on the front surface of the back metal.
【００１３】また、凹部の塑性鍛造時に展延する余材
は、貫通孔を圧壊していくが、この余材のみで貫通孔を
完全に閉塞するのは困難である。実際には、図２（ｂ）
に示すような貫通孔の痕跡８が残る。その痕跡８は、空
気を通すのでフェード現象発生時に摩擦材から生じるガ
スを逃がすのには有効であるが、これがあると例えば微
量にしろ裏金背面からの水分の浸透が許容されることに
なる。Further, the surplus material spread during the plastic forging of the recess crushes the through hole, but it is difficult to completely close the through hole only with this surplus material. Actually, FIG. 2 (b)
The trace 8 of the through hole as shown in FIG. The trace 8 is effective for releasing the gas generated from the friction material when the fade phenomenon occurs because air passes, but if there is such a trace, for example, even a slight amount, the permeation of water from the back surface of the backing metal is allowed.
【００１４】最近では、摩擦材の主成分をアスベストか
ら鉄系ファイバに置換したものもあるが、この種のパッ
ドアッセンブリでは摩擦材の内部錆を極端に嫌う。従っ
て、フェード時のガス抜きよりも水分の浸透防止を重視
すべきである。Recently, asbestos is replaced with iron-based fiber as the main component of the friction material, but this type of pad assembly extremely dislikes internal rust of the friction material. Therefore, the prevention of water penetration should be more important than the degassing at the time of fading.
【００１５】上記窪みはその要求を満たすためのもので
ある。即ち、この窪みを圧印すると、痕跡残存部が再圧
縮されて痕跡が確実に閉塞される。The depression is to meet the requirement. That is, when the depression is pressed, the trace remaining portion is recompressed and the trace is surely closed.
【００１６】このように、本発明の方法によれば、非貫
通の凹部を生産性に優れる塑性鍛造で形成でき、これに
より、従来技術の諸問題が解消される。As described above, according to the method of the present invention, the non-penetrating concave portion can be formed by the plastic forging having excellent productivity, thereby solving the problems of the prior art.
【００１７】[0017]
【実施例】図１にこの発明の方法で作られる裏金を採用
したパッドアッセンブリの一例を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows an example of a pad assembly employing a backing made by the method of the present invention.
【００１８】図のように、裏金１の前面に凹部６が設け
られ、さらに、その凹部の中央部に凹部６よりも小径の
窪み９が印圧して設けられている。この裏金１の前面に
摩擦材２を裏金上で加圧形成して接着剤３で貼付けると
パッドアッセンブリ１０となる。As shown in the figure, a concave portion 6 is provided on the front surface of the backing metal 1, and a depression 9 having a diameter smaller than that of the concave portion 6 is formed in the central portion of the concave portion by printing pressure. The friction material 2 is pressure-formed on the front surface of the backing metal 1 on the backing metal and attached with the adhesive 3 to form the pad assembly 10.
【００１９】このパッドアッセンブリにおける裏金１は
以下のようにして加工されている。The back metal 1 of this pad assembly is processed as follows.
【００２０】即ち、先ず、図（ａ）に示すようにブラン
クにφｄの貫通孔１１を打抜き、次に、ブランクの背面
を支えてブランクの前面に貫通孔１１と同芯のφＤ（Ｄ
＞ｄ）の凹部６をｔ1 の深さに塑性鍛造する。このとき
（φＤ−φｄ）・ｔ1 部の肉が貫通孔１１を自由面とし
てこの自由面側に流動し、貫通孔１１を図２（ｂ）の状
態、即ち、凹部中央に痕跡８が残る状態に圧壊する。That is, first, as shown in FIG. 5A, a blank is punched out with a through hole 11 of φd, and then the back surface of the blank is supported to provide φD (D) concentric with the through hole 11 on the front surface of the blank.
The recess 6 of> d) is plastically forged to a depth of t 1 . At this time, the meat of (φD−φd) · t 1 flows to the free surface side with the through hole 11 as a free surface, and the trace 8 remains in the through hole 11 in the state of FIG. Collapse to a state.
【００２１】そこで、この後、図２（ｃ）に示すよう
に、凹部中央に小さな窪み９印圧して痕跡８を閉塞す
る。その窪み９は、図３のように裏金の背面に設けても
よい。また、窪み９の径及び深さは、無用に大きいと窪
み圧印時に裏金が歪む恐れがあるので、歪み防止のため
に設置目的を達成できる範囲で可及的に小さくするのが
望ましい。Then, after this, as shown in FIG. 2C, a small depression 9 is applied to the center of the recess to close the trace 8. The recess 9 may be provided on the back surface of the back metal as shown in FIG. If the diameter and the depth of the recess 9 are unnecessarily large, the back metal may be distorted at the time of imprinting the recess, so it is desirable to make the size as small as possible within the range where the installation purpose can be achieved for preventing distortion.
【００２２】[0022]
【発明の効果】以上述べたように、この発明のパッド裏
金製造方法では、裏金ブランクに設けた貫通孔を自由面
としてブランク前面の貫通孔を包含する領域に凹部を塑
性鍛造し、さらに、凹部中央に生じる貫通孔の痕跡を、
凹部底面、ブランク背面のいずれかから小さな窪みを痕
跡存在部に印圧成形することによって閉塞するので、前
面、背面のいずれにも突起が無く、また、背面からの水
の浸透も生じない裏金を小さなプレス圧力によって歪み
を生じさせず簡便な鍛造法で容易に作ることができ、コ
ストの削減、パッドアッセンブリの信頼性向上が図れる
と云う効果がある。As described above, according to the method of manufacturing a pad back metal of the present invention, the recess is plastically forged in a region including the through hole on the front surface of the blank with the through hole provided in the back metal blank as a free surface. The trace of the through hole in the center
Since a small depression is pressed from the bottom of the recess or the back of the blank by pressure molding on the trace existing part, there is no protrusion on either the front or the back, and a backing that does not cause water penetration from the back There is an effect that it can be easily manufactured by a simple forging method without causing a distortion by a small press pressure, and that the cost can be reduced and the reliability of the pad assembly can be improved.
【図１】（ａ）：本発明の方法で製造した裏金をもつパ
ッドアッセンブリの正面図 （ｂ）：同上のパッドアッセンブリの断面図1A is a front view of a pad assembly having a back metal manufactured by the method of the present invention, and FIG. 1B is a cross-sectional view of the above pad assembly.
【図２】本発明の方法によるパッド裏金の製造手順を示
す図FIG. 2 is a diagram showing a procedure for manufacturing a pad backing metal according to the method of the present invention.
【図３】本発明の方法で製造したパッド裏金の他の例を
示す断面図FIG. 3 is a cross-sectional view showing another example of a pad backing metal manufactured by the method of the present invention.
【図４】（ａ）：従来の裏金を用いたパッドアッセンブ
リの正面図 （ｂ）：同上のパッドアッセンブリの断面図FIG. 4A is a front view of a conventional pad assembly using a back metal. FIG. 4B is a cross-sectional view of the above pad assembly.
【図５】（ａ）：従来の裏金を用いたパッドアッセンブ
リの正面図 （ｂ）：同上のパッドアッセンブリの断面図FIG. 5A is a front view of a conventional pad assembly using a back metal. FIG. 5B is a cross-sectional view of the above pad assembly.
【図６】（ａ）：従来の裏金を用いたパッドアッセンブ
リの正面図 （ｂ）：同上のパッドアッセンブリの断面図FIG. 6A is a front view of a conventional pad assembly using a back metal. FIG. 6B is a cross-sectional view of the above pad assembly.
【図７】（ａ）：従来の裏金を用いたパッドアッセンブ
リの正面図 （ｂ）：同上のパッドアッセンブリの断面図FIG. 7 (a): Front view of a conventional pad assembly using a back metal (b): Cross-sectional view of the above pad assembly
１ 裏金 ２ 摩擦材 ３ 接着剤 ６ 凹部 ８ 貫通孔の痕跡 ９ 窪み １０ パッドアッセンブリ １１ 貫通孔 1 Back metal 2 Friction material 3 Adhesive 6 Recessed portion 8 Trace of through hole 9 Indentation 10 Pad assembly 11 Through hole
───────────────────────────────────────────────────── フロントページの続き (72)発明者 井後 博志 兵庫県尼崎市久々知西町二丁目２番23号 株式会社セラ内 (56)参考文献 特開 昭60−23644（ＪＰ，Ａ) 特開 昭64−79435（ＪＰ，Ａ) 実開 昭62−45438（ＪＰ，Ｕ) 実開 昭57−109339（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Igo 2-23, Kukuchi Nishimachi, Amagasaki City, Hyogo Prefecture Cera Co., Ltd. (56) References JP-A-60-23644 (JP, A) JP-A-SHO 64-79435 (JP, A) Actually opened 62-45438 (JP, U) Actually opened 57-109339 (JP, U)
Claims (1)
擦材の一部が埋め込まれる凹部を塑性鍛造して形成し、
その凹部を前記貫通孔を包含する領域に設けることによ
り鍛造時に展延する余材を前記貫通孔に流入させて当該
孔を圧壊し、さらに、その後、凹部の底面又はこれとは
反対側のブランク背面の孔痕跡存在部に凹部径よりも小
径の窪みを印圧成形して凹部中央に残る孔の跡を完全に
閉塞することを特徴とするディスクブレーキ用パッド裏
金の製造方法。1. A recessed part in which a part of a friction material is embedded is formed by plastic forging on a front surface of a back metal blank having a through hole,
By providing the recess in the region including the through hole, a surplus material that expands at the time of forging is caused to flow into the through hole to crush the hole, and then the bottom surface of the recess or the blank on the opposite side thereof. A method for manufacturing a disc brake pad backing metal, wherein a recess having a diameter smaller than the recess diameter is formed by pressure molding in the hole trace existence portion on the back surface to completely close the trace of the hole remaining in the center of the recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6111337A JP2530110B2 (en) | 1994-05-25 | 1994-05-25 | Method for manufacturing pad backing for disc brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6111337A JP2530110B2 (en) | 1994-05-25 | 1994-05-25 | Method for manufacturing pad backing for disc brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06323351A JPH06323351A (en) | 1994-11-25 |
| JP2530110B2 true JP2530110B2 (en) | 1996-09-04 |
Family
ID=14558649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6111337A Expired - Fee Related JP2530110B2 (en) | 1994-05-25 | 1994-05-25 | Method for manufacturing pad backing for disc brake |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2530110B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022206184A1 (en) | 2022-06-21 | 2023-12-21 | Hl Mando Corporation | BRAKE BLOCK FOR A DISC BRAKE SYSTEM AND DISC BRAKE SYSTEM |
-
1994
- 1994-05-25 JP JP6111337A patent/JP2530110B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06323351A (en) | 1994-11-25 |
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