JPH0342131A - Manufacture of cylinder material of aluminum - Google Patents
Manufacture of cylinder material of aluminumInfo
- Publication number
- JPH0342131A JPH0342131A JP1175715A JP17571589A JPH0342131A JP H0342131 A JPH0342131 A JP H0342131A JP 1175715 A JP1175715 A JP 1175715A JP 17571589 A JP17571589 A JP 17571589A JP H0342131 A JPH0342131 A JP H0342131A
- Authority
- JP
- Japan
- Prior art keywords
- pipe material
- punch
- tube stock
- die
- engaging part
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 100
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000010409 ironing Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、しごき加工によりアルミニウム製シリンダ
材を製造する方広に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing aluminum cylinder materials by ironing.
従来、アルミニウム製シリンダ材の製造方法としては、
特開昭６３−１９４８３０号公報により公表されている
ように、アルミニウム製パイプ材の一端部に、パイプ材
長手方向に対して４０″〜９０°の範囲の曲げ角度のカ
ール曲げ加工を施し、次に前記パイプ材内に挿入したポ
ンチの先端周縁をカール曲げ部の基端部に係合し、前記
ポンチによりパイプ材を押圧してダイスに通すことによ
り、そのパイプ材にしごき加工を行なう方法が知られて
いる。Conventionally, the manufacturing method for aluminum cylinder materials is as follows:
As disclosed in Japanese Patent Application Laid-open No. 194830/1983, one end of an aluminum pipe material is subjected to a curl bending process with a bending angle in the range of 40" to 90 degrees with respect to the longitudinal direction of the pipe material, and then A method of ironing the pipe material by engaging the peripheral edge of the tip of a punch inserted into the pipe material with the proximal end of the curled portion, pressing the pipe material with the punch and passing it through a die. Are known.
前記従来のアルミニウム製シリンダ材の製造方法の場合
、パイプ材の内面とこれに連設されたカール曲げ部の内
面との間に、パイプ材の中空部に中心を有する円弧状内
面が介在され、この円弧状内面にポンチの先端周縁が接
触した状態で、しごき加工が開始されるので、ポンチが
カール曲げ部付きパイプ材に対し相対的に滑り易いとい
う問題がある。In the case of the conventional method for manufacturing an aluminum cylinder material, an arc-shaped inner surface having a center in the hollow part of the pipe material is interposed between the inner surface of the pipe material and the inner surface of the curled part connected thereto, Since the ironing process is started with the peripheral edge of the tip of the punch in contact with this arc-shaped inner surface, there is a problem in that the punch is relatively easy to slip on the pipe material with the curled portion.
カール曲げ部の曲げ角度を大きくすれは、ボンチとカー
ル曲げ部付きパイプ材との相対的滑り量を小さくできる
が、パイプ材長手方向に対するカール曲げ部の曲げ角度
を大きくすると、カール曲げ部付近の強度が低下し、そ
のためパイプ材をダイスに挿通してポンチにより強力に
押圧すると、しごき加工の途中でカール曲げ部の基端部
がパイプ材から破断する恐れがある。Increasing the bending angle of the curled portion can reduce the amount of relative slippage between the punch and the pipe material with the curled portion, but increasing the bending angle of the curled portion with respect to the longitudinal direction of the pipe material causes the slippage near the curled portion to decrease. The strength decreases, and therefore, if the pipe material is inserted through the die and strongly pressed with a punch, there is a risk that the base end of the curled portion will break from the pipe material during the ironing process.
また前記カール曲げ部を曲げ加工により形成する場合、
曲げ加工上、カール曲げ部の長さを比較的長くする必要
があり、そしてしごき加工を行なったのち、前記カール
曲げ部が切り捨てられるので、材料のロスが比較的大き
いという問題がある。Further, when the curled portion is formed by bending,
In the bending process, it is necessary to make the length of the curled part relatively long, and after the ironing process, the curled part is cut off, so there is a problem that material loss is relatively large.
この発明は、パイプ材とダイスとの相対的な滑りがなく
、かつしごき加工後のパイプ材端部の切り捨て量を少な
くでき、さらにパイプ材端部におけるダイス保合部付近
の強度低下を防止できるアルミニウム製シリンダ材の製
造方法を提供することを目的とするものである。This invention eliminates relative slippage between the pipe material and the die, reduces the amount of cutoff at the end of the pipe material after ironing, and prevents a decrease in strength near the die retaining portion at the end of the pipe material. The object of the present invention is to provide a method for manufacturing an aluminum cylinder material.
前記目的を達成するために、この発明のアルミニウム製
シリンダ材の製造方法においては、アルミニウム製パイ
プ材１の端部に、パイプ材中心側に向かう弯曲加工を施
して、パイプ材１の中空部の外側に円弧中心を有する円
弧状内向き突出面２を、パイプ材ｌの内周面に屈折連設
し、０１ｆ記パイプ材１内に挿入したポンチ３の先端周
縁を、前記円弧状内向き突出面２の基端部に係合した状
態で、前記パイプ材１をダイス４に通してしごき加工を
行なう。In order to achieve the above object, in the method for manufacturing an aluminum cylinder material of the present invention, the end of the aluminum pipe material 1 is curved toward the center of the pipe material, so that the hollow part of the pipe material 1 is curved. An arc-shaped inward protruding surface 2 having an arc center on the outside is bent and connected to the inner circumferential surface of the pipe material 1, and the tip periphery of the punch 3 inserted into the pipe material 1 described in 01f is connected to the arc-shaped inward protrusion. While engaged with the base end of the surface 2, the pipe material 1 is passed through the die 4 and subjected to ironing.
アルミニウム製パイプ材１の内面の外側に中心を有する
円弧状内向き突出面２を、パイプ材１の内周面に屈折連
設し、前記パイプ材１内に挿入したポンチ３の先端周縁
を、前記円弧状内向き突出面２の基端部に係合した状態
で、前記パイプ材１をダイス４に通し、前記ポンチ３に
よりパイプ材１をダイス４に対し押圧移動して、パイプ
材１をしごき加工する。An arc-shaped inward protruding surface 2 having a center on the outside of the inner surface of the aluminum pipe material 1 is bent and continuously connected to the inner peripheral surface of the pipe material 1, and the tip periphery of the punch 3 inserted into the pipe material 1 is The pipe material 1 is passed through the die 4 while being engaged with the base end of the arcuate inward protruding surface 2, and the pipe material 1 is pressed against the die 4 by the punch 3 to form the pipe material 1. Ironing process.
次にこの発明を図示の例によって詳細に説明する。 Next, the present invention will be explained in detail using illustrated examples.
第１図ないし第５図はこの発明の実施例において用いら
れるポンチ保合部付きアルミニウム製パイプ材の第１製
造例を示すものであって、まず第１図に示すように、円
形断面の金属製ロッド５の端部にそれよりも小径の短円
筒体６が形成されて、受型材７が構成され、次に第２図
に示すように、受型材７がアルミニウム製パイプ材１に
挿入されると共に、金属製ロッド５における短円筒体６
側の端縁８がパイプ材１の端縁から少し引込んだ位置に
配置され、次いで第３図に示すように、端円筒体６の周
面に対向する位置に配置されたロール９により、パイプ
材１の端部が短円筒体６に向がって屈曲変形されてポン
チ係合部１ｏが形成されたのち、受型材７をパイプ材；
から抜き取られて、第４図および第５図に示すようなポ
ンチ係合部付きパイプ材１■が製造される。このポンチ
保合部付きパイプ材１１におけるポンチ係合部１０の内
側の円弧状内向き突出面２は、パイプ材１の中空部の外
側に円弧中心■２を有し、かつパイプ材１の内面の端部
に屈折連設されている。1 to 5 show a first manufacturing example of an aluminum pipe material with a punch retaining portion used in an embodiment of the present invention. First, as shown in FIG. A short cylindrical body 6 having a smaller diameter than the rod 5 is formed at the end of the rod 5 to form a receiving mold material 7, and then, as shown in FIG. 2, the receiving mold material 7 is inserted into the aluminum pipe material 1. At the same time, the short cylindrical body 6 in the metal rod 5
The side edge 8 is placed in a position slightly recessed from the edge of the pipe material 1, and then, as shown in FIG. After the end of the pipe material 1 is bent and deformed toward the short cylindrical body 6 to form the punch engaging portion 1o, the receiving mold material 7 is transformed into a pipe material;
A pipe material 12 with a punch engaging portion as shown in FIGS. 4 and 5 is manufactured. The arc-shaped inward protruding surface 2 on the inside of the punch engaging part 10 in this pipe material 11 with a punch retaining part has an arc center 2 on the outside of the hollow part of the pipe material 1, and the inner surface of the pipe material 1 A refraction is connected to the end of the
第６図ないし第９図はこの発明において使用できるポン
チ係合部付きアルミニウム製パイプ材の第２製造例を示
すものであって、まず第６図に示すように、先端周縁に
円弧状断面の環状切欠部１３を備えている２本の受型１
４がアルミニウム製パイプ材ｌ内に挿入されると共に、
各受型（４の先端面が当接され、かつ各受型１４の環状
切欠部■３によりほぼ円弧状断面の環状溝１５が形成さ
れる。FIGS. 6 to 9 show a second manufacturing example of an aluminum pipe material with a punch engagement part that can be used in the present invention. First, as shown in FIG. Two receiving molds 1 provided with an annular cutout 13
4 is inserted into the aluminum pipe material l,
The tip surfaces of each receiving mold 4 are brought into contact with each other, and an annular groove 15 having a substantially arcuate cross section is formed by the annular notch 3 of each receiving mold 14.
次に第７図に示すように、環状溝１５に対向するように
配置されたロール１６により、パイプ材１を環状溝Ｌ５
の面に接触するように屈曲変形させて、円弧状断面のポ
ンチ係合部ｌＯを形成したのち、各受型）４をパイプ材
；から長き取り、次いで第８図に示すように、前記円弧
状断面のポンチ保合部１０をその中央部で切断して、第
８図：こ示すようなポンチ係合部付きパイプ材１１を製
造する。Next, as shown in FIG.
After bending and deforming it so as to contact the surface of the pipe material to form a punch engaging portion lO having an arcuate cross section, each receiving mold 4 is lengthened from the pipe material; and then, as shown in FIG. The punch retaining part 10 having an arcuate cross section is cut at its center to produce a pipe material 11 with a punch engaging part as shown in FIG. 8.
このポンチ係合部付きパイプ材１１におけるポンチ保合
部１０の内側の円弧状内向き突出面２は、パイプ材１の
中空部の外側に円弧中心を有し、がつパイプ材１の内面
の端部に屈折連設されている。The arc-shaped inward protruding surface 2 on the inside of the punch retaining part 10 in this pipe material 11 with a punch engaging part has an arc center on the outside of the hollow part of the pipe material 1, and has a circular arc center on the outside of the hollow part of the pipe material 1. Bends are continuous at the ends.
前述のように構成されたポンチ保合部付きパイプ材１１
を使用して、シリンダ材をしごき加工により製造する場
合は、第１０図に示すように、円形断面のポンチ３をポ
ンチ係合部付きパイプ材１１におけるパイプ材１内に挿
入すると共に、ポンチ３の先端周縁を前記円弧状内向き
突出面２の基端縁に係合した状態で、第１１図に示すよ
うに、支承台１７上に重ねて固定されているダイス４お
よびガイド兼押え部材１８に、ポンチ保合部付きパイプ
材１１をポンチ３により押圧しながら通過させて、パイ
プ材ｌのしごき加工を行ない、アルミニウム製シリンダ
材を製造する。Pipe material 11 with punch retaining portion configured as described above
When producing a cylinder material by ironing using a punch 3, as shown in FIG. As shown in FIG. 11, the die 4 and the guide/holding member 18 are stacked and fixed on the support base 17 with the distal end edge thereof engaged with the proximal edge of the arcuate inward protruding surface 2. Next, the pipe material 11 with the punch retaining portion is passed through the pipe material 11 while being pressed by the punch 3, and the pipe material 1 is ironed to produce an aluminum cylinder material.
この発明を実施する場合、第１２図に示すように、ポン
チ３の先端に台形凹部１９を設けて、θ＝４０°〜６０
°の環状鋭角刃を設けてもよい。When carrying out this invention, as shown in FIG. 12, a trapezoidal recess 19 is provided at the tip of the punch 3, and
An annular sharp-angled blade of ° may be provided.
この発明は前述のように構成されているので、以下に記
載するような効果を奏する。Since this invention is configured as described above, it produces the effects described below.
パイプ材１の端部に弯曲加工を施して、パイプ材■の中
空部の外側に円弧中心を有する円弧状内向き突出面２を
、パイプ材ｌの内周面に屈折連設し、前記パイプ材１内
に挿入したポンチ３の先端周縁を、前記円弧状内向き突
出面２の基端部に係合した状態で、前記パイプ材ｌをダ
イス４に通してしごき加工を行なうので、ポンチ３がパ
ンチ材１に対し滑り移動するのを簡単な手段によって確
実に防止することができ、かつパイプ材１の端部に屈曲
連設されるポンチ保合部ｌＯを短くすることができるの
で、しごき加工を行なったのち行なうポンチ保合部付き
パイプ材１１の切り捨て量を少なくできて経済的であり
、さらにパイプ材ｌの端部に大角度の曲げ加工を施さな
くても、ポンチ３の先端をずれ動かないように確実に係
合できるポンチ係合部１０を形成できるので、強度の大
きいポンチ保合部１０を形成することができる。The end of the pipe material 1 is curved, and an arc-shaped inward protruding surface 2 having an arc center on the outside of the hollow part of the pipe material 1 is bent and continuous with the inner circumferential surface of the pipe material 1. Since the pipe material 1 is passed through the die 4 and ironed while the peripheral edge of the tip of the punch 3 inserted into the material 1 is engaged with the base end of the arcuate inward protruding surface 2, the punch 3 is inserted into the material 1. It is possible to reliably prevent sliding movement of the punch material 1 with respect to the punch material 1 by a simple means, and the punch retaining portion 10, which is bent and connected to the end of the pipe material 1, can be shortened. It is economical because the amount of the pipe material 11 with the punch retaining part to be cut off after processing can be reduced, and furthermore, the tip of the punch 3 can be cut off without having to bend the end of the pipe material l at a large angle. Since it is possible to form the punch engaging portion 10 that can be reliably engaged without shifting, it is possible to form the punch holding portion 10 with high strength.
第１図ないし第５図はこの発明の実施例において用いら
れるポンチ係合部付きアルミニウム製パイプ材の第１製
造例を示すものであって、第１図は受型材の一部を示す
側面図、第２図は受型材をパイプ材内の所定位置に挿入
した状態を示す一部縦断側面図、第３図はパイプ材の端
部にポンチ係合部を形成している状態を示す一部縦断側
面図、第４図は製造されたポンチ保合部付きパイプ材の
一部を示す縦断側面図、第５図は第４図の一部を拡大し
て示す縦断側面図である。
第６図ないし第９図はこの発明において使用できるポン
チ係合部ｆ・ｆきアルミニウム製パイプ材の第２製造り
１を示すものであって、第６閃は２本の受型をパイプ材
内に挿入した状態を示す一部縦断側面図、第７図はパイ
プ材にプンチ係合部を形成している状態を示す一部縦断
側面図、第８図はパイプ材に形成されたポンチ係合部を
切断した状態を示す縦断側面図、第９図は製造されたポ
ンチ係合部付きパイプ材を示す一部縦断側面図である。
第１０図はポンチを挿入したポンチ係合部付きパイプ材
の下端部をダイスの上方に配置した状態を示す縦断側面
図、第１１図はパイプ材のしごき加工を行なっている状
態を示す縦断側面図、第１２図はパイプ材に挿入係合さ
れるポンチ形状態の他の例を示す一部縦断側面図である
。
図において、１はアルミニウム製パイプ材、２は円弧状
内向き突出面、３はポンチ、４はダイス、５は金属製ロ
ッド、６は短円筒体、７は受型材、９はロール、１０は
ポンチ係合部、１１はポンチ係合部付きパイプ材、１３
は環状切欠部、１４は受型、１５は環状溝、１６はロー
ルである。
第４図
第６図
第７図
４1 to 5 show a first manufacturing example of an aluminum pipe material with a punch engagement part used in an embodiment of the present invention, and FIG. 1 is a side view showing a part of the mold material. , Fig. 2 is a partial longitudinal side view showing a state in which the receiving mold material is inserted into a predetermined position within the pipe material, and Fig. 3 is a partial longitudinal side view showing a state in which a punch engaging portion is formed at the end of the pipe material. FIG. 4 is a vertical side view showing a part of the manufactured pipe material with a punch retaining part, and FIG. 5 is a vertical side view showing a part of FIG. 4 in an enlarged manner. Figures 6 to 9 show the second manufacturing process 1 of aluminum pipe material with punch engaging portions f and f that can be used in the present invention, and the sixth stage shows the two receiving molds being attached to the pipe material. Fig. 7 is a partially longitudinal side view showing the state in which the punch engaging part is formed in the pipe material, and Fig. 8 is a partially longitudinal side view showing the state in which the punch engaging part is formed in the pipe material. FIG. 9 is a longitudinal sectional side view showing a state in which the joining portion is cut, and FIG. 9 is a partially longitudinal sectional side view showing the manufactured pipe material with a punch engaging portion. Fig. 10 is a longitudinal side view showing a state in which the lower end of the pipe material with the punch engagement part inserted with the punch is placed above the die, and Fig. 11 is a longitudinal side view showing the state in which the pipe material is being ironed. FIG. 12 is a partially longitudinal side view showing another example of the punch-shaped state inserted into and engaged with the pipe material. In the figure, 1 is an aluminum pipe material, 2 is an arcuate inward protruding surface, 3 is a punch, 4 is a die, 5 is a metal rod, 6 is a short cylindrical body, 7 is a mold material, 9 is a roll, and 10 is a Punch engaging portion, 11, pipe material with punch engaging portion, 13
14 is an annular notch, 14 is a receiving die, 15 is an annular groove, and 16 is a roll. Figure 4 Figure 6 Figure 7 Figure 4
Claims (1)
に向かう弯曲加工を施して、パイプ材１の中空部の外側
に円弧中心を有する円弧状内向き突出面２を、パイプ材
１の内周面に屈折連設し、前記パイプ材１内に挿入した
ポンチ３の先端周縁を、前記円弧状内向き突出面２の基
端部に係合した状態で、前記パイプ材１をダイス４に通
してしごき加工を行なうアルミニウム製シリンダ材の製
造方法。The end of the aluminum pipe material 1 is curved toward the center of the pipe material, so that an arc-shaped inward protruding surface 2 having an arc center on the outside of the hollow part of the pipe material 1 is formed on the inner periphery of the pipe material 1. The pipe material 1 is passed through the die 4 while the peripheral edge of the tip of the punch 3, which is bent and connected to the surface and inserted into the pipe material 1, is engaged with the base end of the arcuate inwardly protruding surface 2. A method for manufacturing aluminum cylinder materials that involves ironing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1175715A JPH0342131A (en) | 1989-07-10 | 1989-07-10 | Manufacture of cylinder material of aluminum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1175715A JPH0342131A (en) | 1989-07-10 | 1989-07-10 | Manufacture of cylinder material of aluminum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0342131A true JPH0342131A (en) | 1991-02-22 |
| JPH0367769B2 JPH0367769B2 (en) | 1991-10-24 |
Family
ID=16000974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1175715A Granted JPH0342131A (en) | 1989-07-10 | 1989-07-10 | Manufacture of cylinder material of aluminum |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0342131A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100364686C (en) * | 2005-09-21 | 2008-01-30 | 赵铎 | Diameter-variable nozzle stub throat process |
| JP2011132610A (en) * | 2009-12-22 | 2011-07-07 | Ikue Hayashi | Glove for suppressing hand fingers |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7069275B2 (en) * | 2020-11-04 | 2022-05-17 | ユニバーサル製缶株式会社 | How to make a bottle can |
-
1989
- 1989-07-10 JP JP1175715A patent/JPH0342131A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100364686C (en) * | 2005-09-21 | 2008-01-30 | 赵铎 | Diameter-variable nozzle stub throat process |
| JP2011132610A (en) * | 2009-12-22 | 2011-07-07 | Ikue Hayashi | Glove for suppressing hand fingers |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0367769B2 (en) | 1991-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4713471B2 (en) | Method for manufacturing a hollow profile comprising a number of longitudinal segments having slots in the longitudinal direction and having different cross-sections from a metal sheet | |
| US9920826B2 (en) | Hollow rack bar and method of manufacturing hollow rack bar | |
| JP2006289496A (en) | Cylindrical shaft and method of manufacturing the same | |
| JPH01205833A (en) | Manufacture of frame member having polygonal cross section and being reinforced partially | |
| US4936129A (en) | Method for forming a vehicle wheel | |
| JPH0342131A (en) | Manufacture of cylinder material of aluminum | |
| JP2009195986A (en) | Cylindrical shaft | |
| JP6327319B2 (en) | Metal tube manufacturing method and apparatus | |
| JP4270921B2 (en) | Bottomed tube and method for forming the same | |
| JP4914962B2 (en) | Pipe manufacturing method | |
| JPH0342132A (en) | Manufacture of aluminum cylinder material | |
| JPH0651211B2 (en) | Can barrel manufacturing method | |
| JP3593381B2 (en) | Pipe flattening method and die used for it | |
| JPH0724870B2 (en) | Pipe bending machine | |
| JPH0866730A (en) | Deep draw forming method for metallic sheet | |
| JPS61283422A (en) | Method and apparatus for bending pipe | |
| KR102678571B1 (en) | Lower arm part manufacturing method using progressive molding technology | |
| JP7406227B2 (en) | Metal plate processing equipment and metal plate processing method | |
| JPS58212826A (en) | Manufacture of pulley | |
| US20210187574A1 (en) | Device for manufacturing bent pipe and method for manufacturing bent pipe | |
| JPS61296925A (en) | Forming method for precise cylinder | |
| JP2000240701A (en) | Manufacturing method and device for low shoe | |
| JP2645787B2 (en) | Circumferential groove forming method | |
| JP3359113B2 (en) | Tightening band and tightening tool | |
| RU1794539C (en) | Method of making parts, having curvilinear flange with concave portion in plan view |