JPWO2004065035A1 - Method of processing end portion of cylindrical body, cylindrical body processed by this method, manufacturing method of vibration isolating bush, vibration isolating bush, and pressing tool - Google Patents

Method of processing end portion of cylindrical body, cylindrical body processed by this method, manufacturing method of vibration isolating bush, vibration isolating bush, and pressing tool Download PDF

Info

Publication number
JPWO2004065035A1
JPWO2004065035A1 JP2004567123A JP2004567123A JPWO2004065035A1 JP WO2004065035 A1 JPWO2004065035 A1 JP WO2004065035A1 JP 2004567123 A JP2004567123 A JP 2004567123A JP 2004567123 A JP2004567123 A JP 2004567123A JP WO2004065035 A1 JPWO2004065035 A1 JP WO2004065035A1
Authority
JP
Japan
Prior art keywords
cylindrical body
pressing tool
cylinder
pressing
roughening
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
JP2004567123A
Other languages
Japanese (ja)
Inventor
高橋　博明
博明 高橋
加藤　明彦
明彦 加藤
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.)
Toyo Tire Corp
Original Assignee
Toyo Tire and Rubber 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 Toyo Tire and Rubber Co Ltd filed Critical Toyo Tire and Rubber Co Ltd
Publication of JPWO2004065035A1 publication Critical patent/JPWO2004065035A1/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/025—Special design or construction with rolling or wobbling dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/12—Shaping end portions of hollow articles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
    • F16F1/3842—Method of assembly, production or treatment; Mounting thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Springs (AREA)

Abstract

筒体（１）の一端部（２１）側の端面（８）に、押圧具（７）に設けた表面粗し作用部（９）を押付けるとともに、押圧具（７）を、筒体（１）の軸線（Ｏ）回りに円錐軌跡又はほぼ円錐軌跡を描くように回転させて、端面（８）を拡張加工し表面粗し加工する筒体の端部の加工方法である。The surface roughening action portion (9) provided on the pressing tool (7) is pressed against the end surface (8) on the one end (21) side of the cylindrical body (1), and the pressing tool (7) is This is a method of processing the end of a cylindrical body that is rotated so as to draw a conical locus or a substantially conical locus around the axis (O) of 1), and the end surface (8) is expanded and roughened.

Description

本発明は、筒体の端部の加工方法及びこの方法により加工した筒体、防振ブッシュの製造方法及び防振ブッシュ、並びに押圧具に関する。
本発明は、自動車のサスペンション機構に組み込まれる防振ブッシュに好適である。The present invention relates to a method of processing an end portion of a cylinder, a cylinder processed by this method, a method of manufacturing a vibration isolation bush, a vibration isolation bush, and a pressing tool.
The present invention is suitable for an anti-vibration bush incorporated in a suspension mechanism of an automobile.

自動車のサスペンション機構においては、車体とサスペンションとの連結部位、すなわち、車輪を支持するアーム（ロアアーム等）とフレーム等の車体側メンバーとの連結部位に、振動減衰・緩衝を目的として筒形の防振ブッシュが設けられている。また、エンジンを支持する支持部に防振ブッシュがエンジンマウントとして設けられることもある。
第７図は、従来の防振ブッシュ１００を示している。この防振ブッシュ１００は、同芯状に配置された金属製の内筒１０１と、外筒１０２と、両者の間に介在されたゴム状弾性体１０３とから成る。
そして、第１支持部材１０５に突設された軸部材１０４が、内筒１０１と第２支持部材１０５のボルト挿通孔とに挿通され、軸部材１０４の先端側の雄ねじ部１３０にナット１３１が螺合される。これにより、内筒１０１が第１及び第２支持部材１０５によって挟持固定される。外筒１０２は第３支持部材１０６の取付け孔１０７に圧入されている。
このように、防振ブッシュ１００の内筒１０１は、第１支持部材１０５と第２支持部材１０５に挟持されることから、内筒１０１の端面１０８の面積が小さいと、軸力を受ける端面の面圧が高くなる。そして、支持部材１０５が凹んでナット１３１が緩みやすい。
この問題を解消する手段として、ストレートの内筒１０１全体の肉厚を厚くして、前記端面１０８の面積を大きくする第１の技術がある。しかしながら、この第１の技術では内筒１０１の重量が増大する。
第８図に示すように、両端部１０９を長手方向の中間部よりも厚肉にした異径の内筒１０１を採用する第２の技術もある。この第２の技術では、内筒１０１が異径であるために、内筒１０１を鍛造等によって成形しておかなければならず、製作コストが高くなる。
第９図に示すように、内筒１０１の端部１０９を押圧具１２０で冷間塑性加工して拡径させる第３の技術も提案されている（例えば特開平５−２００４３８号公報参照）。押圧具１２０は先端面の中央部に突起１２１を備えている。そして押圧具１２０を、内筒１０１の軸線１２２周りに円錐軌跡又はほぼ円錐軌跡を描くように回転させながら前記端面１０８に押付ける。
この第３の技術によれば、あまり硬くない材質の筒体を選択しなければならない。なぜならば、硬い材質の筒体は端面が拡張しにくく、端面の面積を大きく拡張させると、拡張加工の際に端面が割れやすいからである。つまり第３の技術を採用した場合、筒体の材質の選択の幅が狭くなる。In an automobile suspension mechanism, a cylindrical protection for vibration damping and buffering is provided at a connection part between a vehicle body and a suspension, that is, a connection part between an arm supporting a wheel (such as a lower arm) and a vehicle body side member such as a frame. A vibration bush is provided. Further, a vibration isolating bush may be provided as an engine mount on a support portion that supports the engine.
FIG. 7 shows a conventional anti-vibration bush 100. The anti-vibration bush 100 includes a metal inner cylinder 101 arranged concentrically, an outer cylinder 102, and a rubber-like elastic body 103 interposed therebetween.
Then, the shaft member 104 protruding from the first support member 105 is inserted into the inner cylinder 101 and the bolt insertion hole of the second support member 105, and the nut 131 is screwed into the male screw portion 130 on the distal end side of the shaft member 104. Combined. Thereby, the inner cylinder 101 is clamped and fixed by the first and second support members 105. The outer cylinder 102 is press-fitted into the attachment hole 107 of the third support member 106.
Thus, since the inner cylinder 101 of the vibration isolating bush 100 is sandwiched between the first support member 105 and the second support member 105, if the area of the end surface 108 of the inner cylinder 101 is small, the end surface receiving the axial force Surface pressure increases. And the support member 105 is dented and the nut 131 is easy to loosen.
As a means for solving this problem, there is a first technique in which the thickness of the entire straight inner cylinder 101 is increased and the area of the end face 108 is increased. However, in the first technique, the weight of the inner cylinder 101 increases.
As shown in FIG. 8, there is also a second technique that employs an inner cylinder 101 having a different diameter in which both end portions 109 are thicker than the middle portion in the longitudinal direction. In the second technique, since the inner cylinder 101 has a different diameter, the inner cylinder 101 must be formed by forging or the like, which increases the manufacturing cost.
As shown in FIG. 9, a third technique has also been proposed in which the end 109 of the inner cylinder 101 is subjected to cold plastic working with a pressing tool 120 to expand the diameter (see, for example, Japanese Patent Application Laid-Open No. 5-200438). The pressing tool 120 includes a protrusion 121 at the center of the tip surface. Then, the pressing tool 120 is pressed against the end face 108 while rotating so as to draw a conical locus or a substantially conical locus around the axis 122 of the inner cylinder 101.
According to the third technique, it is necessary to select a cylindrical body made of a material that is not so hard. This is because the end face of a cylindrical body made of a hard material is difficult to expand, and if the area of the end face is greatly expanded, the end face is likely to break during expansion. That is, when the third technique is adopted, the selection range of the material of the cylinder is narrowed.

本発明は上記実状に鑑みて成されたもので、その目的は、筒体の圧接力で支持部材が凹む不具合を回避できて支持部材で筒体を安定支持でき、しかも、筒体の軽量化や製作コストの低廉化を図ることができ、筒体の材質の選択の幅を広くすることができるようにする点にある。
本発明にかかる筒体の端部の加工方法の特徴は、筒体の一端部側の端面に、押圧具に設けた表面粗し作用部を押付けるとともに、前記押圧具を、前記筒体の軸線回りに円錐軌跡又はほぼ円錐軌跡を描くように回転させて、前記端面を拡張加工し表面粗し加工する点にある。
この方法によれば、筒体の一端部に、筒体の軸線方向に向かう押圧力と、筒体の径方向外方側に向かう押圧力とが加わる。これらの押圧力により、筒体の一端部側の端面を拡張加工し表面粗し加工することができる。そして、単に軸線方向の押圧力を加えた場合よりも小さな力で前記端面を拡張させることができる。これにより、筒体の端面の面圧を小さくすることができ、筒体に対する支持部材が筒体からの軸力で凹む不具合を回避できる。
例えば筒体の全体を厚肉にすることで前記端面の面積を大きくする手段に比べると、筒体を軽くすることができ、端部側が大径の異径の筒体を鍛造により形成する手段に比べると、筒体を安価に製作することができる。
また、筒体の端面を表面粗し加工してあるから、筒体と支持部材の間に滑りが生じにくい。従って、筒体に対する一対の支持部材の挟持力が小さくても、筒体を確実に挟持しやすい。つまり、筒体の端面を表面粗し加工してない場合よりも、一対の支持部材による挟持力が小さくて済む。そして、拡張させる筒体の端面部分の大きさが小さくて済む。その結果、硬い材質の筒体も選択できて、筒体の材質の選択の幅を広げることができる。
前記端面の拡張加工と表面粗し加工を別個の工具でそれぞれ行うと、工程数が多くなり製作コストが高くなる。これに対して本発明の方法によれば、前記表面粗し作用部を備えた押圧具で両加工を一挙に行うことができ、工程数を少なくすることができ、安価に製作することができる。
本発明にかかる筒体は、上記の方法で端部が加工された筒体である。
この構成により、軽くて安価で丈夫な材質の筒体を提供することができる。
本発明にかかる第１の防振ブッシュの製造方法の特徴は、
筒体の一端部側の端面に、押圧具に設けた表面粗し作用部を押付けるとともに、前記押圧具を、前記筒体の軸線周りに円錐軌跡又はほぼ円錐軌跡を描くように回転させて、前記端面を拡張加工し表面粗し加工する筒体端部加工工程と、
前記筒体端部加工工程で端部が加工された筒体の外周部にゴム状弾性体を加硫成形する加硫成形工程とから成る点にある。
この方法によれば、上記の筒体の端部の加工方法により得られる上記作用と同様の作用を奏することができる。その結果、軽くて安価で丈夫な材質の筒体を備えた防振ブッシュを得ることができる。
本発明にかかる第２の防振ブッシュの製造方法の特徴は、
筒体の外周部にゴム状弾性体を加硫成形する加硫成形工程と、
前記加硫成形工程で外周部にゴム状弾性体を加硫成形された筒体の一端部側の端面に、押圧具に設けた表面粗し作用部を押付けるとともに、前記押圧具を、前記筒体の軸線周りに円錐軌跡又はほぼ円錐軌跡を描くように回転させて、前記筒体の一端部側の端面を拡張加工し表面粗し加工する筒体端部加工工程とから成る点にある。
この方法によれば、上記の筒体の端部の加工方法により得られる上記作用と同様の作用を奏することができる。その結果、軽くて安価で丈夫な材質の筒体を備えた防振ブッシュを提供することができる。さらに次のような作用も奏することができる。
例えば、筒体の一端部側の端面を拡張させた後に、筒体の外周部にゴム状弾性体を加硫成形する手段では、第８図に示すように、ゴム状弾性体１０３の端面１１０の自由長を十分確保することができない。すなわち、内筒１０１の端部１０９が拡径されていると、縮径部１１１では、軸線方向の型抜きに対してアンダーカットの形状になる。そのために、ゴム状弾性体１０３の端面１１０を二点鎖線１１２の位置に設定することができず、ゴム状弾性体１０３の端面１１０の面積が小さくなって、弾性変形に対する自由長を十分に確保できない。その結果、ゴム状弾性体１０３の耐久性が低下する。
これに対して、本発明によれば、筒体の外周部にゴム状弾性体を加硫成形してから端面を拡張させるから、上記のような加硫成形の際の型抜の不都合が無い。従って、ゴム状弾性体の自由長を十分長く確保できる。これにより、ゴム状弾性体の耐久性を向上させることができる。
本発明にかかる防振ブッシュは、上記のいずれか一つの防振ブッシュの製造方法により製造された防振ブッシュである。
この構成により、軽くて安価で丈夫な材質の筒体を備えた防振ブッシュを提供することができる。また、軽くて安価で丈夫な材質の筒体を備えるとともに、耐久性のよいゴム状弾性体を備えた防振ブッシュを提供することができる。
本発明にかかる押圧具は、前記表面粗し作用部を備えた上記のいずれか一つの方法で用いる押圧具である。
この押圧具を用いることで、筒体の一端部側の端面を上記のように拡張加工し表面粗し加工することができる。
前記押圧具が、前記筒体の一端部側の中空孔に挿入させる凸部と、前記凸部の基端側から径方向外方側に張出す張出し部とを押圧具本体の先端側に備え、前記表面粗し作用部は、前記張出し部の先端側の端面を凹凸面に形成して構成されている構造では、筒体の一端部側の端面をより拡張加工し表面粗し加工しやすくすることができる。
前記凹凸面が、径方向内方側ほど前記押圧具本体の先端側に位置するテーパ面に形成されており、そのテーパー角が１６８°〜１７６°であると、筒体の一端部側の端面に表面粗し作用部をより食い込ませやすくすることができる。
前記凹凸面が、前記張出し部の軸線を中心とする同芯状の多数の環状凹凸部を前記張出し部の先端側の端面に形成して構成されていると、筒体の表面を綾目状に表面粗し加工することができて、筒体を挟持する一対の支持部材に筒体の端面を圧接しやすくすることができる。The present invention has been made in view of the above circumstances, and its purpose is to avoid the problem that the support member is recessed due to the pressure contact force of the cylinder, and to stably support the cylinder with the support member, and to reduce the weight of the cylinder. In addition, the manufacturing cost can be reduced and the selection of the material of the cylindrical body can be widened.
The feature of the processing method of the end portion of the cylindrical body according to the present invention is that the surface roughening acting portion provided in the pressing tool is pressed against the end surface on the one end portion side of the cylindrical body, and the pressing tool is attached to the cylindrical body. The end face is expanded and roughened by rotating so as to draw a conical locus or a substantially conical locus around the axis.
According to this method, a pressing force toward the axial direction of the cylinder and a pressing force toward the radially outer side of the cylinder are applied to one end of the cylinder. By these pressing forces, the end surface on the one end portion side of the cylindrical body can be expanded and roughened. The end face can be expanded with a smaller force than when a pressing force in the axial direction is simply applied. Thereby, the surface pressure of the end surface of a cylinder can be made small, and the malfunction that the supporting member with respect to a cylinder is dented with the axial force from a cylinder can be avoided.
For example, as compared with the means for increasing the area of the end face by making the entire cylinder thick, the cylinder can be made lighter, and means for forging a cylindrical body having a large diameter on the end side by forging. Compared to, the cylinder can be manufactured at low cost.
Further, since the end surface of the cylindrical body is roughened, slipping hardly occurs between the cylindrical body and the support member. Therefore, even if the clamping force of the pair of support members with respect to the cylindrical body is small, it is easy to securely clamp the cylindrical body. That is, the clamping force by the pair of support members can be smaller than when the end surface of the cylinder is not roughened. And the size of the end face portion of the cylinder to be expanded can be small. As a result, a cylindrical body made of a hard material can be selected, and the range of selection of the cylindrical body material can be expanded.
When the end face expansion process and the surface roughening process are performed with separate tools, the number of processes increases and the manufacturing cost increases. On the other hand, according to the method of the present invention, both processes can be performed at once with the pressing tool provided with the surface roughening action portion, the number of steps can be reduced, and the manufacturing can be performed at low cost. .
The cylindrical body concerning this invention is a cylindrical body by which the edge part was processed by said method.
With this configuration, it is possible to provide a light, inexpensive, and durable material cylinder.
The characteristics of the manufacturing method of the first vibration-proof bushing according to the present invention are as follows:
While pressing the surface roughening acting portion provided on the pressing tool against the end face on the one end side of the cylindrical body, the pressing tool is rotated so as to draw a conical locus or a substantially conical locus around the axis of the cylindrical body. A cylinder end portion processing step for expanding and roughening the end face;
And a vulcanization molding step of vulcanizing and molding a rubber-like elastic body on the outer peripheral portion of the cylinder whose end portion has been processed in the cylindrical end portion processing step.
According to this method, the same operation as the above-described operation obtained by the method for processing the end of the cylindrical body can be achieved. As a result, it is possible to obtain an anti-vibration bush including a light, inexpensive, and durable material cylinder.
The feature of the second method of manufacturing a vibration-proof bush according to the present invention is as follows:
A vulcanization molding step of vulcanizing and molding a rubber-like elastic body on the outer periphery of the cylindrical body;
While pressing the surface roughening action part provided in the pressing tool to the end surface on the one end part side of the cylindrical body obtained by vulcanizing and molding the rubber-like elastic body on the outer periphery in the vulcanization molding step, the pressing tool is And a cylindrical end portion machining step in which the end surface on one end portion side of the cylindrical body is expanded and roughened by rotating so as to draw a conical locus or a substantially conical locus around the axis of the cylindrical body. .
According to this method, the same operation as the above-described operation obtained by the method for processing the end of the cylindrical body can be achieved. As a result, it is possible to provide an anti-vibration bush including a cylindrical body that is light, inexpensive, and durable. Furthermore, the following effects can also be achieved.
For example, in a means for vulcanizing and molding a rubber-like elastic body on the outer peripheral portion of the cylindrical body after expanding the end face on one end side of the cylindrical body, as shown in FIG. 8, the end face 110 of the rubber-like elastic body 103 is used. It is not possible to secure a sufficient free length. That is, when the diameter of the end 109 of the inner cylinder 101 is increased, the reduced diameter portion 111 has an undercut shape with respect to die cutting in the axial direction. Therefore, the end surface 110 of the rubber-like elastic body 103 cannot be set at the position of the two-dot chain line 112, and the area of the end surface 110 of the rubber-like elastic body 103 is reduced, so that a sufficient free length for elastic deformation is secured. Can not. As a result, the durability of the rubber-like elastic body 103 is lowered.
On the other hand, according to the present invention, since the end face is expanded after the rubber-like elastic body is vulcanized and molded on the outer peripheral portion of the cylindrical body, there is no inconvenience of die-cutting during the vulcanization molding as described above. . Therefore, the free length of the rubber-like elastic body can be secured sufficiently long. Thereby, durability of a rubber-like elastic body can be improved.
The anti-vibration bush according to the present invention is an anti-vibration bush manufactured by any one of the above-described anti-vibration bush manufacturing methods.
With this configuration, it is possible to provide an anti-vibration bush including a cylindrical body that is light, inexpensive, and durable. Further, it is possible to provide an anti-vibration bush that includes a cylindrical body that is light, inexpensive, and durable, and that includes a rubber-like elastic body with good durability.
The pressing tool according to the present invention is a pressing tool used in any one of the above methods provided with the surface roughening action portion.
By using this pressing tool, the end face on the one end portion side of the cylindrical body can be expanded and roughened as described above.
The pressing tool includes a convex portion to be inserted into a hollow hole on one end side of the cylindrical body, and an overhanging portion projecting radially outward from the proximal end side of the convex portion on the distal end side of the pressing tool main body. In the structure in which the surface roughening action part is configured by forming the end face on the tip side of the overhanging part as an uneven surface, the end face on the one end part side of the cylindrical body is further expanded and surface roughened easily. can do.
The concave and convex surface is formed on a tapered surface located on the distal end side of the pressing tool main body toward the radially inner side, and when the taper angle is 168 ° to 176 °, the end surface on one end side of the cylindrical body It is possible to make the surface roughening action portion more easily bite.
When the concave and convex surface is formed by forming a large number of concentric annular concave and convex portions centering on the axis of the overhanging portion on the end surface on the distal end side of the overhanging portion, the surface of the cylindrical body is shaped like a cross The surface of the cylinder can be roughened and the end surfaces of the cylinder can be easily pressed against the pair of support members that sandwich the cylinder.

第１図は、自動車の車体に取付けられた防振ブッシュを示す縦断面図、
第２図は、筒体の一端部を加工している初期の状態を示す図、
第３図は、筒体の一端部を加工している終期の状態を示す図、
第４図は、筒体の他端部を加工している終期の状態を示す図、
第５図は、押圧具の押圧作用部を示す図、
第６図は、押圧具の押圧作用部を示す図、
第７図は、従来の防振ブッシュを示す図、
第８図は、従来の別の防振ブッシュを示す図、
第９図は、従来の加工方法を示す図、
第１０図は、第９図の方法で加工された防振ブッシュを示す縦断面図である。FIG. 1 is a longitudinal sectional view showing an anti-vibration bush attached to the body of an automobile,
FIG. 2 is a diagram showing an initial state of processing one end of the cylindrical body,
FIG. 3 is a diagram showing an end state in which one end of the cylindrical body is being processed;
FIG. 4 is a diagram showing an end state in which the other end of the cylindrical body is being processed;
FIG. 5 is a diagram showing a pressing action part of a pressing tool;
FIG. 6 is a view showing a pressing action part of the pressing tool;
FIG. 7 shows a conventional anti-vibration bush.
FIG. 8 is a view showing another conventional anti-vibration bush,
FIG. 9 is a diagram showing a conventional processing method;
FIG. 10 is a longitudinal sectional view showing a vibration isolating bush processed by the method of FIG.

以下、本発明の実施の形態を図面に基づいて説明する。
第１図に、本発明にかかる方法により加工した内筒１（筒体に相当）を備えた防振ブッシュを示してある。この防振ブッシュは、前記内筒１と、外筒２と、それらの間に介在されてそれらを連結するゴム状弾性体３とから成り、自動車の車体とサスペンション機構との連結部位に設けられている。第１図において、４は内筒１に挿通させた取付けボルト、５は内筒１を挟持する一対の支持部材、６は外筒２が圧入される車体側のカラーである。
内筒１と外筒２は鉄やアルミニウム等の金属で形成されている。内筒１は外筒２よりも厚肉で長い。そして、内筒１の軸線Ｏ方向の両端部が外筒２の両端部から突出している。内筒１の両端部は冷間塑性加工によって端面が拡張加工され表面粗し加工されている。ゴム状弾性体３は内筒１の外周面と外筒２の内周面に加硫接着されている。
次に、内筒１の端部の加工方法について説明する。この加工は、外筒２との間にゴム状弾性体３を加硫成形された内筒１に対して行う。内筒１はストレート管で、製品寸法よりも少し長く切断されている。上記の加工方法では内筒１の端部に対する押圧具７（第２図参照）を用いる。押圧具７は押圧装置（図示せず）に取付けられ、押圧装置によって押圧及び回転させられる。
第２図に示すように、押圧装置のテーブルに防振ブッシュを縦姿勢になるように取付け固定する。そして、内筒１の一端部２１側の端面８（上端面）に、押圧具７に設けた表面粗し作用部９が軽く圧接するとともに、内筒１の一端部２１側の内面１０に、押圧具本体の先端２３側に設けた凸部１４が軽く圧接するように、押圧具７で内筒１の一端部２１を押圧する。
この状態で、第３図に示すように、押圧具７を内筒１の軸線Ｏ周りに円錐軌跡又はほぼ円錐軌跡を描くように回転させながら押圧力を高めていく。これにより端面８を拡張加工し表面粗し加工する。
第５図，第６図に示すように、押圧具７は、内筒１の一端部２１側の中空孔に挿入させる円錐台状の凸部１４と、凸部１４の基端２７側から径方向外方側２８に張出す円柱状の張出し部１３とを押圧具本体１２の先端２３側に備えている。凸部１４と張出し部１３は同芯である。
凸部１４の基端２７の径は内筒１の内径よりも少し大きく設定され、先端の径は内筒１の内径よりも少し小さく設定されている。そして、凸部１４の先端２３側は面取りされている。
表面粗し作用部９は、張出し部１３の先端２９側の端面２４を凹凸面に形成して構成されている。前記凹凸面は、径方向内方側２２ほど押圧具本体１２の先端２３側に位置するテーパ面に形成されており、そのテーパー角θは１７６°である（１６８°〜１７６°が好適である）。
前記凹凸面は、張出し部１３の軸線Ｐを中心とする同芯状の多数の環状凹凸部１７を張出し部１３の先端２９側の端面２４に形成して構成されている。表面粗し作用部９の硬度は、通常の表面粗し工具に設けてある表面粗し作用部９の硬度とほぼ同じである。押圧具本体１２の後端部は押圧装置に対する取付け部１５になっている。
内筒１の一端部２１側の端面８の拡張加工・表面粗し加工が完了すると、防振ブッシュを上下反転させて押圧装置のテーブルに取付け固定する。そして、第４図に示すように、同様の手順で他端部２６側の端面１６を拡張加工し表面粗し加工する。
上記の方法を採用した防振ブッシュの製造方法は、内筒１の外周部２０にゴム状弾性体３を加硫成形する加硫成形工程と、
この加硫成形工程で外周部にゴム状弾性体３を加硫成形された内筒１の一端部２１側の端面８に、押圧具７に設けた表面粗し作用部９を押付けるとともに、押圧具７を内筒１の軸線Ｏ回りに円錐軌跡又はほぼ円錐軌跡を描くように回転させて、内筒１の一端部２１側の端面８を拡張加工及び表面粗し加工する筒体端部加工工程とから成る方法である。
また、上記の方法を採用した別の防振ブッシュの製造方法として、内筒１の一端部２１側の端面８に、押圧具７に設けた表面粗し作用部９を押付けるとともに、押圧具７を内筒１の軸線Ｏ回りに円錐軌跡又はほぼ円錐軌跡を描くように回転させて、前記端面８を拡張加工し表面粗し加工する筒体端部加工工程と、
この筒体加工工程で端部が加工された内筒１の外周部２０にゴム状弾性体３を加硫成形する加硫成形工程とから成る方法を挙げることができる。
前記外筒２が設けられていないタイプの防振ブッシュがある。この防振ブッシュは、例えば前記車体側のカラー６に、ゴム状弾性体３が露出した状態で圧入される。本発明は、このような防振ブッシュの筒体（上記の実施形態における内筒１に相当する部材）の端部を加工する場合にも適用することができる。
本発明は、防振ブッシュ以外の部品に設けられる筒体の端部を加工する場合にも適用することができる。Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a vibration isolating bush provided with an inner cylinder 1 (corresponding to a cylinder) processed by the method according to the present invention. The anti-vibration bush is composed of the inner cylinder 1, the outer cylinder 2, and a rubber-like elastic body 3 that is interposed between the inner cylinder 1 and the outer cylinder 2 and is connected to the suspension mechanism. ing. In FIG. 1, 4 is a mounting bolt inserted through the inner cylinder 1, 5 is a pair of support members that sandwich the inner cylinder 1, and 6 is a collar on the vehicle body side into which the outer cylinder 2 is press-fitted.
The inner cylinder 1 and the outer cylinder 2 are made of a metal such as iron or aluminum. The inner cylinder 1 is thicker and longer than the outer cylinder 2. Then, both end portions of the inner cylinder 1 in the direction of the axis O protrude from both end portions of the outer cylinder 2. Both end portions of the inner cylinder 1 are subjected to surface roughening by extending the end surfaces by cold plastic working. The rubber-like elastic body 3 is vulcanized and bonded to the outer peripheral surface of the inner cylinder 1 and the inner peripheral surface of the outer cylinder 2.
Next, a method for processing the end portion of the inner cylinder 1 will be described. This process is performed on the inner cylinder 1 formed by vulcanizing the rubber-like elastic body 3 between the outer cylinder 2 and the outer cylinder 2. The inner cylinder 1 is a straight pipe and is cut slightly longer than the product dimensions. In the above processing method, the pressing tool 7 (see FIG. 2) for the end of the inner cylinder 1 is used. The pressing tool 7 is attached to a pressing device (not shown), and is pressed and rotated by the pressing device.
As shown in FIG. 2, the vibration isolating bush is attached and fixed to the table of the pressing device so as to be in a vertical posture. And the surface roughening action part 9 provided in the pressing tool 7 is lightly pressed against the end face 8 (upper end face) on the one end 21 side of the inner cylinder 1, and on the inner face 10 on the one end 21 side of the inner cylinder 1, The one end 21 of the inner cylinder 1 is pressed by the pressing tool 7 so that the convex part 14 provided on the tip 23 side of the pressing tool main body is pressed lightly.
In this state, as shown in FIG. 3, the pressing force is increased while rotating the pressing tool 7 so as to draw a conical locus or a substantially conical locus around the axis O of the inner cylinder 1. As a result, the end face 8 is expanded and roughened.
As shown in FIGS. 5 and 6, the pressing tool 7 has a frustoconical convex portion 14 to be inserted into the hollow hole on the one end portion 21 side of the inner cylinder 1 and a diameter from the base end 27 side of the convex portion 14. A cylindrical projecting portion 13 projecting to the direction outward side 28 is provided on the distal end 23 side of the pressing tool main body 12. The convex portion 14 and the overhang portion 13 are concentric.
The diameter of the base end 27 of the convex portion 14 is set slightly larger than the inner diameter of the inner cylinder 1, and the diameter of the distal end is set slightly smaller than the inner diameter of the inner cylinder 1. And the front-end | tip 23 side of the convex part 14 is chamfered.
The surface roughening action portion 9 is configured by forming an end surface 24 on the tip 29 side of the overhang portion 13 into an uneven surface. The uneven surface is formed as a tapered surface located on the distal end 23 side of the pressing tool main body 12 toward the radially inner side 22 and has a taper angle θ of 176 ° (preferably 168 ° to 176 °). ).
The concavo-convex surface is formed by forming a large number of concentric annular concavo-convex portions 17 centering on the axis P of the overhang portion 13 on the end surface 24 on the tip 29 side of the overhang portion 13. The hardness of the surface roughening action part 9 is substantially the same as the hardness of the surface roughening action part 9 provided in a normal surface roughening tool. The rear end portion of the pressing tool main body 12 is an attachment portion 15 for the pressing device.
When the expansion process / roughening process of the end face 8 on the one end 21 side of the inner cylinder 1 is completed, the vibration isolating bush is turned upside down and fixed to the table of the pressing device. Then, as shown in FIG. 4, the end surface 16 on the other end 26 side is expanded and roughened by the same procedure.
A method of manufacturing the vibration-proof bushing employing the above method includes a vulcanization molding step of vulcanizing and molding the rubber-like elastic body 3 on the outer peripheral portion 20 of the inner cylinder 1;
While pressing the surface roughening action portion 9 provided on the pressing tool 7 against the end surface 8 on the one end 21 side of the inner cylinder 1 vulcanized and molded with the rubber-like elastic body 3 in the outer peripheral portion in this vulcanization molding step, A cylindrical end portion for expanding and roughening the end surface 8 on the one end portion 21 side of the inner cylinder 1 by rotating the pressing tool 7 so as to draw a conical locus or a substantially conical locus about the axis O of the inner cylinder 1. And a processing step.
In addition, as another method of manufacturing a vibration-proof bush that employs the above-described method, the surface roughening operating portion 9 provided on the pressing tool 7 is pressed against the end surface 8 on the one end 21 side of the inner cylinder 1, and the pressing tool 7 is a cylindrical body end machining step in which the end surface 8 is expanded and roughened by rotating 7 to draw a conical locus or a substantially conical locus around the axis O of the inner cylinder 1;
A method comprising a vulcanization molding step of vulcanizing and molding the rubber-like elastic body 3 on the outer peripheral portion 20 of the inner cylinder 1 whose end portion has been processed in this cylindrical body processing step can be mentioned.
There is a type of anti-vibration bushing in which the outer cylinder 2 is not provided. This anti-vibration bush is press-fitted into the collar 6 on the vehicle body side with the rubber-like elastic body 3 exposed. The present invention can also be applied to the case of processing the end portion of a cylinder body of such a vibration-proof bushing (a member corresponding to the inner cylinder 1 in the above embodiment).
The present invention can also be applied to the case of processing the end of a cylindrical body provided in a component other than the vibration isolating bush.

本発明の筒体の端部の加工方法によれば、筒体の圧接力で支持部材が凹む不具合を回避できて支持部材で筒体を安定支持でき、しかも、筒体の軽量化や製作コストの低廉化を図ることができ、筒体の材質の選択の幅を広くすることができる。そして、防振ブッシュ等の自動車部品や、その他の各種機械の部品に採用すると有利になる。
本発明の防振ブッシュの製造方法によれば、上記の効果を奏することができる防振ブッシュを得ることができる。According to the method for processing an end portion of a cylindrical body of the present invention, it is possible to avoid the problem that the supporting member is recessed due to the pressure contact force of the cylindrical body, to stably support the cylindrical body with the supporting member, and to reduce the weight and manufacturing cost of the cylindrical body. Therefore, the range of selection of the material of the cylinder can be widened. Then, it is advantageous to adopt it for automobile parts such as vibration-proof bushings and other various machine parts.
According to the method for manufacturing a vibration isolating bush of the present invention, it is possible to obtain a vibration isolating bush that can achieve the above-described effects.

Claims (9)

筒体の一端部側の端面に、押圧具に設けた表面粗し作用部を押付けるとともに、前記押圧具を、前記筒体の軸線回りに円錐軌跡又はほぼ円錐軌跡を描くように回転させて、前記端面を拡張加工し表面粗し加工する筒体の端部の加工方法。While pressing the surface roughening action part provided in the pressing tool against the end face on the one end side of the cylindrical body, the pressing tool is rotated so as to draw a conical locus or a substantially conical locus around the axis of the cylindrical body. The processing method of the edge part of the cylinder which expands the said end surface and processes the surface roughening. 請求項１に記載の方法で端部が加工された筒体。A cylinder whose end is processed by the method according to claim 1. 筒体の一端部側の端面に、押圧具に設けた表面粗し作用部を押付けるとともに、前記押圧具を、前記筒体の軸線周りに円錐軌跡又はほぼ円錐軌跡を描くように回転させて、前記端面を拡張加工し表面粗し加工する筒体端部加工工程と、
前記筒体端部加工工程で端部が加工された筒体の外周部にゴム状弾性体を加硫成形する加硫成形工程とから成る防振ブッシュの製造方法。While pressing the surface roughening acting portion provided on the pressing tool against the end face on the one end side of the cylindrical body, the pressing tool is rotated so as to draw a conical locus or a substantially conical locus around the axis of the cylindrical body. A cylinder end portion processing step for expanding and roughening the end face;
A vibration-proof bushing manufacturing method comprising: a vulcanization molding step of vulcanizing and molding a rubber-like elastic body on an outer peripheral portion of a cylindrical body whose end portion is processed in the cylindrical body end portion processing step. 筒体の外周部にゴム状弾性体を加硫成形する加硫成形工程と、
前記加硫成形工程で外周部にゴム状弾性体を加硫成形された筒体の一端部側の端面に、押圧具に設けた表面粗し作用部を押付けるとともに、前記押圧具を、前記筒体の軸線周りに円錐軌跡又はほぼ円錐軌跡を描くように回転させて、前記筒体の一端部側の端面を拡張加工し表面粗し加工する筒体端部加工工程とから成る防振ブッシュの製造方法。A vulcanization molding step of vulcanizing and molding a rubber-like elastic body on the outer periphery of the cylindrical body;
While pressing the surface roughening action part provided in the pressing tool to the end surface on the one end part side of the cylindrical body obtained by vulcanizing and molding the rubber-like elastic body on the outer periphery in the vulcanization molding step, the pressing tool is An anti-vibration bush comprising: a cylindrical end portion processing step for expanding and roughening the end surface on one end portion side of the cylindrical body by rotating so as to draw a conical locus or a substantially conical locus around the axis of the cylindrical body Manufacturing method. 請求項３又は４に記載の方法で製造された防振ブッシュ。A vibration isolating bush manufactured by the method according to claim 3 or 4. 前記表面粗し作用部を備えた請求項１，３，４のいずれか一つに記載の方法に用いる押圧具。The pressing tool used for the method as described in any one of Claim 1, 3, 4 provided with the said surface roughening effect | action part. 前記筒体の一端部側の中空孔に挿入させる凸部と、前記凸部の基端側から径方向外方側に張出す張出し部とを押圧具本体の先端側に備え、前記表面粗し作用部は、前記張出し部の先端側の端面を凹凸面に形成して構成されている請求項６記載の押圧具。A convex portion to be inserted into the hollow hole on one end portion side of the cylindrical body, and an overhang portion projecting radially outward from the proximal end side of the convex portion are provided on the distal end side of the pressing tool body, and the surface roughening is performed. The pressing tool according to claim 6, wherein the action portion is configured by forming an end surface on a tip side of the overhang portion into an uneven surface. 前記凹凸面は、径方向内方側ほど前記押圧具本体の先端側に位置するテーパ面に形成されており、そのテーパー角は１６８°〜１７６°である請求項７記載の押圧具。The pressing tool according to claim 7, wherein the uneven surface is formed on a tapered surface located closer to a distal end side of the pressing tool main body toward a radially inner side, and a taper angle is 168 ° to 176 °. 前記凹凸面は、前記張出し部の軸線を中心とする同芯状の多数の環状凹凸部を前記張出し部の先端側の端面に形成して構成されている請求項７又は８記載の押圧具。The pressing tool according to claim 7 or 8, wherein the uneven surface is formed by forming a plurality of concentric annular uneven portions centering on an axis of the overhang portion on an end surface on a tip side of the overhang portion.
JP2004567123A 2003-01-20 2003-01-20 Method of processing end portion of cylindrical body, cylindrical body processed by this method, manufacturing method of vibration isolating bush, vibration isolating bush, and pressing tool Pending JPWO2004065035A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2003/000448 WO2004065035A1 (en) 2003-01-20 2003-01-20 Method of processing end of sleeve, sleeve processed by this method, method of producing anti-vibration bushing, anti-vibration bushing, and pressing tool

Publications (1)

Publication Number Publication Date
JPWO2004065035A1 true JPWO2004065035A1 (en) 2006-05-18

Family

ID=32750572

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004567123A Pending JPWO2004065035A1 (en) 2003-01-20 2003-01-20 Method of processing end portion of cylindrical body, cylindrical body processed by this method, manufacturing method of vibration isolating bush, vibration isolating bush, and pressing tool

Country Status (3)

Country Link
JP (1) JPWO2004065035A1 (en)
AU (1) AU2003203356A1 (en)
WO (1) WO2004065035A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4741694B2 (en) * 2009-06-29 2011-08-03 東海ゴム工業株式会社 Anti-vibration rubber bush

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61248930A (en) * 1985-04-25 1986-11-06 Yamashita Rubber Kk Bush and its production
JPH0722780B2 (en) * 1990-04-20 1995-03-15 開洋技研株式会社 Manufacturing method of grooved flare flange
CA2070857C (en) * 1991-07-23 2003-12-02 Michel Gautheron Post molding wedge forming process for pivot joint internal bushing ends, and applications
JPH11108094A (en) * 1997-10-09 1999-04-20 Bridgestone Corp Manufacture of vibration control device
JP2002188671A (en) * 2000-12-25 2002-07-05 Toyo Tire & Rubber Co Ltd Manufacturing method for vibro-isolating bush

Also Published As

Publication number Publication date
WO2004065035A1 (en) 2004-08-05
AU2003203356A1 (en) 2004-08-13

Similar Documents

Publication Publication Date Title
JP3681727B2 (en) End processing method of metal cylinder, metal cylinder, method of manufacturing vibration isolating bush using the same processing method, and vibration isolating bush
JP4203063B2 (en) Vibration isolator
JP2006220208A (en) Installation structure of vibration-proof bushing
JP2002081479A (en) Vibration-proof bush
EP1219853B1 (en) Method of producing vibration-isolating bushing
JPWO2004065035A1 (en) Method of processing end portion of cylindrical body, cylindrical body processed by this method, manufacturing method of vibration isolating bush, vibration isolating bush, and pressing tool
WO2003008129A1 (en) Vibration isolating bush, and method of producing the same
JP4832344B2 (en) Anti-vibration bush manufacturing method and anti-vibration bush
JP3698111B2 (en) Anti-vibration bushing manufacturing method
JP2006026746A (en) Method for producing vibration-proof bush
JPH0666343A (en) Manufacture of fitting bracket for cylinder device
JP4282712B2 (en) Anti-vibration bush manufacturing method and anti-vibration bush
JP2006064073A (en) Vibration control mount
JP2001317578A (en) Vibration control bush
JP2010060023A (en) Vibration damping bushing
JP2003182332A (en) Seal structure
JP2001027285A (en) Power plant mounting device
JP2000205323A (en) Vibration isolating bush
JP2003320829A (en) Suspension arm and manufacturing method for the same
JP2004084954A (en) Vibration isolation bush
JP2000257662A (en) Vibration isolator
JP2005325890A (en) Cylindrical type liquid sealed vibration isolator
JP4861945B2 (en) Manufacturing method of stabilizer bar with stabilizer bush
JPH0741100U (en) Engine mount and press die for forming positioning protrusions
JP2010084911A (en) Vibration control bush

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20051220

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20090317

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20090714