JPH035246B2 - - Google Patents
Info
- Publication number
- JPH035246B2 JPH035246B2 JP60125163A JP12516385A JPH035246B2 JP H035246 B2 JPH035246 B2 JP H035246B2 JP 60125163 A JP60125163 A JP 60125163A JP 12516385 A JP12516385 A JP 12516385A JP H035246 B2 JPH035246 B2 JP H035246B2
- Authority
- JP
- Japan
- Prior art keywords
- mandrel
- large diameter
- cylindrical
- rough
- forming
- 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 - Lifetime
Links
- 238000009987 spinning Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 238000010409 ironing Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 238000000465 moulding Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、マンドレルに嵌装した筒状の粗形材
の外周にローラを押接して、該ローラを上記マン
ドレルに対し相対的に旋回させながら、かつ相対
的に軸方向へ移動させて該粗形材を延伸する、い
わゆるしごきスピニング成形によつて内面に大径
部をそなえる円筒体成品を成形する方法に関す
る。Detailed Description of the Invention (Field of Industrial Application) The present invention involves pressing a roller against the outer periphery of a cylindrical rough-shaped material fitted onto a mandrel, and rotating the roller relative to the mandrel. However, the present invention relates to a method of forming a cylindrical product having a large diameter portion on the inner surface by so-called iron spinning forming, in which the rough-shaped material is stretched while being relatively moved in the axial direction.
（従来の技術）
第２図は従来一般に用いられているスピニング
成形機の説明図、第３図はこのスピニング成形機
を用いて内面に大径部をそなえる円筒体を成形す
る従来の方法の説明図である。(Prior art) Fig. 2 is an explanatory diagram of a conventionally commonly used spinning forming machine, and Fig. 3 is an explanation of a conventional method of forming a cylindrical body with a large diameter portion on the inner surface using this spinning forming machine. It is a diagram.
主に第２図において、１は当該成形機のベツ
ド、２はこのベツドと一体のギヤボツクス、３は
このギヤボツクスに支承したスピンドルで、スピ
ンドル３は図外のモータからギヤボツクス２内の
ギヤリングを介して回転駆動される。４はマンド
レルでスピンドル３に嵌着してある。このマンド
レルは、第３図に示すように、大径の基端部４ａ
と、この基端部から段部４ｂを介して延出した小
径の主体部４ｃとから形成され、主体部４ｃの外
径は前記円筒体成品の内面に成形するべき前記大
径部の内径にもとづいて定められる。５はマンド
レル４の後端（図面で右端）を支持するためのテ
ールストツクである。 Mainly in Fig. 2, 1 is the bed of the molding machine, 2 is a gearbox integrated with this bed, and 3 is a spindle supported on this gearbox. Rotationally driven. 4 is a mandrel that is fitted onto the spindle 3. As shown in FIG. 3, this mandrel has a large diameter base end 4a.
and a small-diameter main portion 4c extending from this base end via a step portion 4b, and the outer diameter of the main portion 4c is equal to the inner diameter of the large-diameter portion to be formed on the inner surface of the cylindrical product. determined based on 5 is a tail stock for supporting the rear end (right end in the drawing) of the mandrel 4.
６はベツド１に係合してマンドレル４の回転軸
心と平行に摺動しうるサドルで、図示外の送り手
段によりギヤボツクス２の方へ駆動されて往動
し、また該手段により復動することができる。７
はサドル６に支持された例えば３個のブラケツ
ト、８はブラケツト７の各々に支承したローラで
ある。これらのブラケツトは図示外の押圧手段に
より上記回転軸心に向けて押出することができ
る。 A saddle 6 is engaged with the bed 1 and can slide in parallel to the rotation axis of the mandrel 4, and is driven toward the gear box 2 by a feeding means not shown in the drawings to move forward and backward by the means. be able to. 7
For example, three brackets are supported by the saddle 6, and rollers 8 are supported by each of the brackets 7. These brackets can be pushed out toward the rotational axis by a pressing means not shown.
尚、スピニング成形機にはスピンドル３を固定
してローラ８の組を旋回させるもの、あるいはサ
ドル６を固定してスピンドル３に送りをかけるも
のなどがある。 Incidentally, there are some spinning molding machines in which the spindle 3 is fixed and a set of rollers 8 are rotated, and others in which the saddle 6 is fixed and feed is applied to the spindle 3.
主に第３図に従い、かかるスピニング成形機を
用いての前記円筒体成品の成形工程を説明する。 The process of forming the cylindrical product using the spinning forming machine will be explained mainly with reference to FIG.
第３図Ａにおいて、１０は厚肉短円筒形の粗形
材でマンドレル主体部４ｃに外嵌しうる。また同
図Ｄは円筒体成品１３を示し、その両端からの距
離l1の区間が内径D1の小径部１３ａ、中間l2の区
間が内径D2の大径部１３ｂである。 In FIG. 3A, 10 is a thick-walled short cylindrical rough-shaped member that can be fitted onto the mandrel main body 4c. Further, FIG. D shows a cylindrical product 13, in which a section at a distance l1 from both ends is a small diameter portion 13a with an inner diameter D1 , and a section at the middle l2 is a large diameter portion 13b with an inner diameter D2 .
第１工程：第３図Ａのように粗形材１０をマン
ドレル主体部４ｃに嵌装してその前端面（図面で
左端面）を段部４ｂに当接させ、マンドレル４を
回転駆動する。サドル６の位置調整をおこなつて
ローラ８を粗形材１０の後端から前記距離l1のと
ころに配置する。次にブラケツト７の前記押圧手
段を作動させてローラ８を粗形材１０の外周に押
接し、サドル６の前記送り手段を作動させてロー
ラ８が粗形材の前端から前記距離l1のところに至
るまで往動させる。ここでローラ８の前記押接を
解いて復動させる。かかる往復動作をくり返えす
と、粗形材１０の材料がしごかれて後方へ押出さ
れ、同図Ｂに示すような、中間部が延伸されて薄
肉となつた１次成品１１が成形される。 First step: As shown in FIG. 3A, the rough profile 10 is fitted onto the mandrel main body 4c, its front end surface (the left end surface in the drawing) is brought into contact with the stepped portion 4b, and the mandrel 4 is driven to rotate. The position of the saddle 6 is adjusted to place the roller 8 at the distance l 1 from the rear end of the rough section 10. Next, the pressing means of the bracket 7 is actuated to press the roller 8 against the outer periphery of the rough profile 10, and the feeding means of the saddle 6 is actuated so that the roller 8 is moved at the distance l 1 from the front end of the rough profile. Move it back and forth until it reaches . At this point, the roller 8 is released from the pressed contact and is caused to move back. By repeating this reciprocating motion, the material of the rough shaped material 10 is squeezed and extruded backwards, and a primary product 11 whose middle part is stretched and has a thinner wall as shown in FIG. B is formed. Ru.
第２工程：１次成品１１とマンドレル４とを取
外し、同図Ｃに示すような主体部４c′が更に小径
の別のマンドレル４′と交換する。また割型９を
用意する。割形９は縦割りされた例えば３部材か
ら成り、これらの部材全体によつてマンドレル主
体部４c′を包含できる。この状態において９ａは
円筒体成品１３の中間区間l2に対応させて形成し
た割型９の大径部、９ｂ，９ｂはこの大径部の両
側に形成した小径部で、大径部９ａの外径を１次
成品１１内径に、また小径部９ｂの外径を円筒体
成品における小径部１３ａの内径にそれぞれ対応
させてある。 Second step: The primary product 11 and the mandrel 4 are removed and replaced with another mandrel 4' whose main body portion 4c' is smaller in diameter as shown in FIG. Also, prepare a split mold 9. The split shape 9 consists of, for example, three vertically divided members, and the mandrel main body 4c' can be encompassed by these members as a whole. In this state, 9a is a large diameter part of the split mold 9 formed corresponding to the intermediate section l2 of the cylindrical product 13, 9b, 9b are small diameter parts formed on both sides of this large diameter part, and 9b is a small diameter part formed on both sides of this large diameter part. The outer diameter corresponds to the inner diameter of the primary product 11, and the outer diameter of the small diameter portion 9b corresponds to the inner diameter of the small diameter portion 13a of the cylindrical product.
第３工程：第３図Ｃに示すごとく、マンドレル
主体部４c′に割型９を介して１次成品１１を嵌装
し、その前端面を段部４b′に当接させる。次に第
１工程にならい、１次成品１１の後端部分をロー
ラ８によりスピニングする。これにより該部分が
小径部９ｂに落し込まれて２次成品１２が成形さ
れる。 Third step: As shown in FIG. 3C, the primary product 11 is fitted onto the mandrel main body portion 4c' via the split mold 9, and its front end surface is brought into contact with the stepped portion 4b'. Next, following the first step, the rear end portion of the primary product 11 is spun by the roller 8. As a result, the part is dropped into the small diameter part 9b and the secondary product 12 is formed.
第４工程：割型９と共に２次成品１２を反転
し、その前端部（反転した場合の後端部）につい
て第３工程と同様なスピニング落し込み加工をお
こなう。これによつて第３図Ｄに示すような円筒
体成品１３が得られる。 Fourth step: The secondary product 12 is reversed together with the split mold 9, and the front end (rear end when reversed) is subjected to the same spinning process as in the third step. As a result, a cylindrical product 13 as shown in FIG. 3D is obtained.
その後、円筒体成品１３外周や端面には必要な
機械加工が施こされ、また小径部１３ａ，１３ａ
を精密加工してここに軸体を挿嵌する。この場合
大径部１３ｂは逃げ部を形成する。 Thereafter, necessary machining is performed on the outer periphery and end face of the cylindrical product 13, and the small diameter portions 13a, 13a are
Precision machined and insert the shaft body here. In this case, the large diameter portion 13b forms a relief portion.
（問題点）
しごきスピニング成形は、成品精度が高くまた
良好な材料組織をもつ円筒体を容易に成形しうる
という点で極めて有利な方法であるが、この方法
によつて内面に大径部をそなえる円筒体を成形し
ようとするときは、前述の説明からわかるよう
に、多くの工程と、それにともなう段取替えとを
必要とするために、成品の原価高をまねくという
難点があつた。(Problem) Ironing and spinning forming is an extremely advantageous method in that it can easily form a cylindrical body with high product accuracy and a good material structure, but it is difficult to form a large diameter part on the inner surface with this method. As can be seen from the above explanation, when trying to mold the cylindrical body to be provided, there was a problem in that it required many steps and accompanying setup changes, resulting in a high cost of the finished product.
そこで本発明の課題は当該方法の上記利点を生
かしつつ、工程の削減をはかる点にある。 Therefore, an object of the present invention is to reduce the number of steps while taking advantage of the above-mentioned advantages of the method.
（本発明の手段）
前記課題を解決した本発明の手段は、筒状の粗
形材における、大径部の形成対応部外に剛なリン
グを外嵌し、上記大径部の形成対応部をしごきス
ピニング加工するものである。(Means of the present invention) The means of the present invention for solving the above-mentioned problems is to fit a rigid ring outside the forming corresponding part of the large diameter part in the cylindrical rough profile material, and to form the forming corresponding part of the large diameter part. This process involves ironing and spinning.
（作用）
前記第３図Ｂを援用して本発明の作用を説明す
る。前述のように粗形材１０の材料が後方へ押出
されて延伸するとき、該部の材料がローラ８にし
ごかれつつ外方から内方へ流れるほか、内方の材
料が上記流れに伴つて外方へつれ出されるので、
マンドレル主体４ｃとの間には成形の進行ととも
に隙間ｄが生じてくる。そして該粗形材の両端部
はそれらの背後がしごかれて縮径することで、図
面に示すごとくテーパ状に変形してここにも隙間
d′が生じる。(Operation) The operation of the present invention will be explained with reference to FIG. 3B. As mentioned above, when the material of the rough section 10 is extruded backwards and stretched, the material in this section flows from the outside to the inside while being squeezed by the rollers 8, and the material on the inside flows along with the flow. Because they are taken outside,
A gap d is generated between the mandrel main body 4c and the mandrel main body 4c as the molding progresses. The backs of both ends of the rough profile are squeezed and reduced in diameter, resulting in a tapered shape as shown in the drawing, and there is also a gap here.
d′ occurs.
上記背影のもとに本発明は、大径部の形成対応
部外、この例では粗形材１０の両端部に剛なリン
グを外嵌して大径部１３ｂの形成対応部にしごき
スピニング加工を施こすので、該加工部に隙間ｄ
が生じてその内径が拡大し、また両端部はここに
外嵌した剛なリングによつて上記変形が阻止され
る。この結果、リングに対応する内面には小径部
が、また上記の加工部分に対応して大径部がそれ
ぞれ形成される。 Based on the above background, the present invention has been developed by fitting rigid rings outside the forming portion of the large diameter portion, in this example, on both ends of the rough section 10, and applying iron spinning to the forming portion of the large diameter portion 13b. is applied, so there is a gap d in the processed area.
This causes the inner diameter to expand, and the above deformation is prevented by rigid rings externally fitted at both ends. As a result, a small diameter portion is formed on the inner surface corresponding to the ring, and a large diameter portion is formed corresponding to the above-mentioned processed portion.
（実施例）
第１図Ａはしごきスピニング成形の段取りが完
了した状態を、また同図Ｂは該成形加工が終了し
て円筒体成品３１が得られた状態をそれぞれ示
す。(Example) FIG. 1A shows a state in which the setup for ladder spinning forming has been completed, and FIG. 1B shows a state in which the forming process has been completed and a cylindrical product 31 has been obtained.
第１図Ａにおいて、２４はマンドレルで、前記
第２図のスピニング成形機に装着してスピンドル
３から回転駆動する。マンドレル２４は大径の基
端部２４ａと、この基端部から段部２４ｂを介し
て延出した小径の主体部２４ｃとから形成されて
いる。 In FIG. 1A, 24 is a mandrel, which is attached to the spinning molding machine shown in FIG. 2 and rotated by the spindle 3. In FIG. The mandrel 24 is formed from a large-diameter base end 24a and a small-diameter main body 24c extending from the base end via a step 24b.
３０は厚肉短円筒形の粗形材で、マンドレル主
体部２４ｃに遊嵌しうる。そして粗形材３０の内
径をマンドレル主体部２４ｃの外径とともに円筒
体成品３１における小径部３１ａの内径D1とほ
ぼ同等に定める。２５，２５は粗形材３０の両端
部に外嵌した剛なリングで、上記小径部３１ａ，
３１ａの形成部にほぼ対応させて位置決めする。 Reference numeral 30 denotes a thick-walled short cylindrical rough-shaped member that can be loosely fitted into the mandrel main body 24c. The inner diameter of the rough profile 30 is determined to be substantially equal to the outer diameter of the mandrel main body portion 24c and the inner diameter D1 of the small diameter portion 31a of the cylindrical product 31. 25, 25 are rigid rings fitted onto both ends of the rough profile 30, and the small diameter portions 31a,
It is positioned so as to substantially correspond to the forming part 31a.
かかる粗形材３０をマンドレル主体部２４ｃに
嵌装してその前端面を段部２４ｂに当接させ、前
記従来の第１工程と同様にして、ローラ８により
リング２５，２５の間のしごきスピニングする。
よつて粗形材３０はその両端部がリング２５，２
５によつて保形されたまま該リング間の材料が後
方へ流れて延伸し、その際に前述したごとくマン
ドレル主体部２４ｃとの間に隙間が生じる。 The rough profile 30 is fitted onto the mandrel main body 24c, its front end surface is brought into contact with the stepped portion 24b, and the roller 8 is used to squeeze and spin between the rings 25, 25 in the same manner as in the conventional first step. do.
Therefore, the rough profile 30 has rings 25, 2 at both ends thereof.
The material between the rings flows backward and stretches while being held in shape by the mandrel main body 24c, as described above, creating a gap between the rings and the mandrel main body 24c.
したがつて円筒体成品３１にはリング２５，２
５の外嵌部に対応して小径部３１ａ，３１ａが、
また該リング間に対応して大径部３１ｂがそれぞ
れ形成される。すなわち、円筒体成品３１を１回
の段取により１工程で成形することができ、加え
て前記割型や別のマンドレルのような面倒な用具
が不要となる。 Therefore, the cylindrical product 31 has rings 25, 2.
Small diameter portions 31a, 31a correspond to the external fitting portions of No. 5,
Also, large diameter portions 31b are formed correspondingly between the rings. That is, the cylindrical product 31 can be molded in one step with one set-up, and in addition, troublesome tools such as the split mold or another mandrel are not required.
（効果）
以上説明したように、本発明によれば内面に大
径部をそなえる円筒体成品をしごきスピニング加
工によつて成形する際に、その工程を極めて単純
化しうるので、これによつて成品原価を低減する
ことができる。(Effects) As explained above, according to the present invention, when forming a cylindrical product with a large diameter portion on the inner surface by ironing and spinning, the process can be extremely simplified. Costs can be reduced.
第１図は本発明の工程説明図、第２図は本発明
および従来の方法に使用するスピニング成形機の
要部斜視図、第３図は従来の工程説明図である。
４，４′，２４……マンドレル、８……しごき
用のローラ、１０，３０……粗形材、１３，３１
……円筒体成品、１３ｂ，３１ｂ……大径部、２
５……リング。
FIG. 1 is an explanatory diagram of the process of the present invention, FIG. 2 is a perspective view of a main part of a spinning molding machine used in the present invention and the conventional method, and FIG. 3 is an explanatory diagram of the conventional process. 4, 4', 24... Mandrel, 8... Roller for ironing, 10, 30... Rough profile, 13, 31
... Cylindrical body product, 13b, 31b ... Large diameter part, 2
5...Ring.
Claims (1)
形材の外周からしごきスピニング加工を施こして
内面に大径部が形成された円筒体成品を成形する
方法において、前記筒状の粗形材における、前記
大径部の形成対応部外に剛なリングを外嵌し、当
該大径部の形成対応部をしごきスピニング加工す
る内面に大径部をそなえる円筒体成品の成形方
法。1. A method for forming a cylindrical product in which a large diameter portion is formed on the inner surface by fitting a cylindrical rough shape into a mandrel and subjecting the rough shape to ironing and spinning from the outer periphery. A method for forming a cylindrical product, in which a rigid ring is externally fitted outside the portion corresponding to the formation of the large diameter portion in a rough shaped material, and the portion corresponding to the formation of the large diameter portion is provided with a large diameter portion on the inner surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60125163A JPS61286030A (en) | 1985-06-11 | 1985-06-11 | Formation of cylindrical body with large diameter part on inner surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60125163A JPS61286030A (en) | 1985-06-11 | 1985-06-11 | Formation of cylindrical body with large diameter part on inner surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61286030A JPS61286030A (en) | 1986-12-16 |
| JPH035246B2 true JPH035246B2 (en) | 1991-01-25 |
Family
ID=14903435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60125163A Granted JPS61286030A (en) | 1985-06-11 | 1985-06-11 | Formation of cylindrical body with large diameter part on inner surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61286030A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5579578A (en) * | 1993-10-27 | 1996-12-03 | Hayes Wheels International, Inc. | Method for producing a rim for a vechicle wheel |
| JP4560670B2 (en) * | 2003-06-18 | 2010-10-13 | カヤバ工業株式会社 | Spinning method of aluminum alloy pipe material |
| CN104607520B (en) * | 2015-01-16 | 2017-01-11 | 西北工业大学 | Spinning mechanism and method for forming corrugated pipe |
-
1985
- 1985-06-11 JP JP60125163A patent/JPS61286030A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61286030A (en) | 1986-12-16 |
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