JPH0563254B2 - - Google Patents
Info
- Publication number
- JPH0563254B2 JPH0563254B2 JP4880085A JP4880085A JPH0563254B2 JP H0563254 B2 JPH0563254 B2 JP H0563254B2 JP 4880085 A JP4880085 A JP 4880085A JP 4880085 A JP4880085 A JP 4880085A JP H0563254 B2 JPH0563254 B2 JP H0563254B2
- Authority
- JP
- Japan
- Prior art keywords
- die
- cylindrical material
- guide groove
- guide block
- guide
- 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
- 239000000463 material Substances 0.000 claims description 32
- 238000000641 cold extrusion Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 description 10
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Landscapes
- Forging (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は冷間押出し成形装置に係り、特に薄肉
の円筒素材の歯形成形に使用される冷間押出し装
置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cold extrusion molding apparatus, and more particularly to a cold extrusion apparatus used for tooth forming of thin-walled cylindrical materials.
（従来技術）
外周面に段部が形成された中空円筒状の素材小
径部外側面に歯形を成形する場合の一般的な加工
方法としては、切削加工と転造成形とがある。(Prior Art) Typical processing methods for forming a tooth profile on the outer surface of a small-diameter portion of a hollow cylindrical material with a stepped portion formed on the outer circumferential surface include cutting and rolling.
しかし、切削加工による場合は、切削粉が無駄
になるため歩留りが悪く、しかも生産性において
もその向上が図れないという欠点があり、また転
造成形では歯形の精度が低下する、という難点が
ある。 However, when using machining, the yield is poor because the cutting powder is wasted, and productivity cannot be improved.Also, rolling forming has the disadvantage that the accuracy of the tooth profile decreases. .
そこで冷間押出しによる歯形成形が提案されて
いる。第４図は冷間押出しによる歯形成形の状態
を示すもので、中心線ｌの左側は歯形成形以前の
状態を、また右側は歯形成形後の状態を示してい
る。同図中、１はダイスであつてその内周面には
歯形成形部１ａが設けられており、ダイス１内に
挿入された円筒状の素材２は、押出しパンチ３に
よつて加圧され押し出されるようになつている。
この押出しパンチ３は小径部３ａを有しており、
円筒素材２の空孔に嵌合されるようになつてい
る。 Therefore, tooth forming by cold extrusion has been proposed. FIG. 4 shows the state of a tooth formed by cold extrusion, with the left side of the center line l showing the state before the tooth forming, and the right side showing the state after the tooth forming. In the figure, 1 is a die, the inner peripheral surface of which is provided with a tooth forming part 1a, and a cylindrical material 2 inserted into the die 1 is pressed and extruded by an extrusion punch 3. It's starting to become easier.
This extrusion punch 3 has a small diameter portion 3a,
It is adapted to be fitted into a hole in the cylindrical material 2.
（発明が解決しようとする問題点）
上記の如くして冷間押出しする場合、円筒素材
２が厚肉であれば格別の不都合は生じないのであ
るが、薄肉の場合には、円筒素材２が歯形成形部
１ａによつて成形される際、同図からわかるよう
に円筒素材２が座屈すると、という問題が生ずる
ことになる。(Problems to be Solved by the Invention) When performing cold extrusion as described above, if the cylindrical material 2 is thick, no particular inconvenience will occur; however, if the cylindrical material 2 is thin, the cylindrical material 2 As can be seen from the figure, a problem arises when the cylindrical material 2 buckles when being formed by the tooth forming section 1a.
（問題を解決するための手段）
本発明は、歯形成形部に押出し方向のガイド溝
を形成し、該ガイド溝の底面に摺動自在であつて
円筒素材の外側面に当接自在なガイドブロツクを
設ける、というものである。(Means for solving the problem) The present invention forms a guide groove in the extrusion direction in the tooth forming part, and a guide block that is slidable on the bottom surface of the guide groove and can freely come into contact with the outer surface of the cylindrical material. The idea is to set up a
（作用）
ガイド溝にガイドブロツクをさしこみ、該ガイ
ドブロツクに円筒素材を保持させた後、押出しパ
ンチの小径部を円筒素材の空孔に嵌合させ、この
状態でガイドブロツクと円筒素材とを押出しパン
チによつて加圧すると、ガイドブロツクはガイド
溝内を摺動するとともに円筒素材の外側面には歯
形成形部によつて歯形が形成されることになる。(Function) After inserting the guide block into the guide groove and letting the guide block hold the cylindrical material, the small diameter part of the extrusion punch is fitted into the hole in the cylindrical material, and in this state, the guide block and the cylindrical material are extruded. When pressurized by the punch, the guide block slides within the guide groove, and a tooth profile is formed on the outer surface of the cylindrical material by the tooth forming section.
（実施例）
以下図面に示す実施例を参照しながら本発明を
説明すると、第１図に示すように、ダイス１０
は、歯形成形用ダイス１０ａと、内径及び外径が
歯形成形用ダイス１０ａと相等しいガイド用ダイ
ス１０ｂとからなり、ガイド用ダイス１０ｂは歯
形成形用ダイス１０ａ上に端面相互が接面するよ
うに載置されている。歯形成形用ダイス１０ａの
内周面には歯形成形部１１が設けられており、こ
の歯形成形部１１には第２図にも示すように複数
のガイド溝１１ａが形成されている。該ガイド溝
１１ａはダイス１０の軸線ｌ方向に伸長し歯形成
形部１１の上下方向全長にわたつて設けられてい
るとともに該溝１１ａの底部はダイス１０の内周
面に達し、該溝１１ａの底面の軸線ｌからの距離
はダイス１０の内径と相等しくなつている。(Embodiment) The present invention will be explained below with reference to the embodiment shown in the drawings.As shown in FIG.
consists of a tooth forming die 10a and a guide die 10b whose inner diameter and outer diameter are equal to those of the tooth forming die 10a, and the guide die 10b is placed on the tooth forming die 10a so that its end surfaces are in contact with each other. It is placed there. A tooth forming part 11 is provided on the inner peripheral surface of the tooth forming die 10a, and a plurality of guide grooves 11a are formed in this tooth forming part 11, as also shown in FIG. The guide groove 11a extends in the direction of the axis l of the die 10 and is provided over the entire vertical length of the tooth forming part 11, and the bottom of the groove 11a reaches the inner circumferential surface of the die 10, and the bottom of the groove 11a The distance from the axis l is equal to the inner diameter of the die 10.
第１図及び第２図において、１２はガイドブロ
ツクであつて、その肉厚ｔはガイド溝１１ａの幅
よりも小さく該溝１１ａ内を上下に摺動自在とな
つている。このガイドブロツク１２はガイド溝１
１ａの底面に摺動自在な摺動面１２ａと、後述す
る円筒素材３の外側面に当接自在な当接面１２ｂ
とを有しており、これら摺動面１２ａと当接面１
２ｂとの距離は、ガイド溝１１ａの深さＤよりも
小さくなつている。つまりガイドブロツク１２
は、ガイド溝１１ａの開口面を越えることなく、
ガイド溝１１ａ内に位置している。ここでは専ら
ガイド溝１１ａとガイドブロツク１２との寸法関
係について述べたが、次にガイドブロツク１２と
円筒素材１３との寸法関係について述べる。ガイ
ドブロツク１２の肉厚ｔは成形すべき歯の歯元部
の幅ｗと相等しく、また当接面１２ｂの軸線ｌか
らの距離ｍは、歯先径ｒと相等しくさらに摺動面
１２ａの軸線ｌからの距離ｎはダイス１０の内径
よりも若干小さく設定されている。 In FIGS. 1 and 2, 12 is a guide block whose wall thickness t is smaller than the width of the guide groove 11a and is capable of sliding vertically within the groove 11a. This guide block 12 has a guide groove 1
A sliding surface 12a that can freely slide on the bottom surface of 1a, and a contact surface 12b that can freely come into contact with the outer surface of the cylindrical material 3, which will be described later.
These sliding surfaces 12a and contact surfaces 1
2b is smaller than the depth D of the guide groove 11a. In other words, guide block 12
without exceeding the opening surface of the guide groove 11a,
It is located within the guide groove 11a. Although the dimensional relationship between the guide groove 11a and the guide block 12 has been described here, the dimensional relationship between the guide block 12 and the cylindrical material 13 will be described next. The wall thickness t of the guide block 12 is equal to the width w of the dedendum of the tooth to be formed, and the distance m from the axis l of the contact surface 12b is equal to the tip diameter r of the sliding surface 12a. The distance n from the axis l is set slightly smaller than the inner diameter of the die 10.
ガイドブロツク１２は、また、その一端に、図
面において上端部にＬ字状の切欠部１２ａを有し
ており、この切欠部１２′ａに円筒素材１３の段
部１３ａが支持されるようになつている。 The guide block 12 also has an L-shaped notch 12a at its upper end in the drawing, and the step 13a of the cylindrical material 13 is supported by this notch 12'a. ing.
同図において、１４は押出しパンチであつて大
径部１４ａと小径部１４ｂとからなり、小径部１
４ｂは円筒素材１３の空孔に嵌合されるとともに
段部１４ｃはガイドブロツク１２と円筒素材１３
とのそれぞれの上端面に当接自在となつている。 In the figure, 14 is an extrusion punch consisting of a large diameter part 14a and a small diameter part 14b.
4b is fitted into the hole of the cylindrical material 13, and the stepped portion 14c is connected to the guide block 12 and the cylindrical material 13.
It can freely come into contact with the upper end surface of each.
なお、図中１５はガイドブロツク１２を下端か
ら保持する保持リング、１６はダイス１０の外側
に設けられた収縮自在なシユリンクリングであ
る。 In the figure, 15 is a retaining ring that holds the guide block 12 from the lower end, and 16 is a shrink ring provided on the outside of the die 10.
次に上記構成に係る装置を使用する場合につい
て述べると、ダイス１０をシユリンクリング１６
内に挿入した後、ダイス１０が押出し時の成形荷
重に耐え得る程度にこのシユリンクリング１６を
収縮させた後、ガイドブロツク１２を保持するた
めの保持リング１５をダイス１０の下方から挿入
する。ついで成形すべき歯数分のガイドブロツク
１２のそれぞれをガイド溝１１ａ内に差し込んだ
後、薄肉の段付き円筒素材１３をダイス１０内に
挿入し、円筒素材１３の段部１３ａを切欠部１
２′ａに保持させる。この後ダイス１０の下方か
ら油圧を供給することによつて保持リング１５と
ガイドブロツク１２との接面状態を保持する。 Next, when using the apparatus having the above configuration, the die 10 is inserted into the shrink ring 16.
After inserting the shrink ring 16 into the die 10, the shrink ring 16 is contracted to the extent that the die 10 can withstand the molding load during extrusion, and then the retaining ring 15 for holding the guide block 12 is inserted from below the die 10. Next, each of the guide blocks 12 corresponding to the number of teeth to be formed is inserted into the guide groove 11a, and then the thin stepped cylindrical material 13 is inserted into the die 10, and the stepped portion 13a of the cylindrical material 13 is inserted into the notch 1.
Hold it at 2'a. Thereafter, by supplying hydraulic pressure from below the die 10, the contact state between the retaining ring 15 and the guide block 12 is maintained.
こうしてダイス１０への円筒素材１３のセツト
が終了したならば、押出しパンチ１４を下降させ
る。下降によつて押出しパンチ１４の小径部１４
ｂは円筒素材１３の空孔に嵌入し、さらに段部１
４ｃがガイドブロツク１２と円筒素材１３の大径
部１３ｂとのそれぞれの上端面に接面すると、ガ
イドブロツク１２と円筒素材１３とは下方に押し
込まれることになり、第１図の右側の図によつて
示されるように、ガイドブロツク１２の摺動面１
２ａは、ガイド用ダイス１０ｂの内面、歯形成形
部１１の底面及び歯形成形用ダイス１０ａの内面
沿いに摺動するとともに円筒素材１３の小径部１
３ｃの外側面には歯形成形部１１によつて歯形が
成形されることになる。なお、保持リング１５は
ガイドブロツク１２とともに下降する。 When the setting of the cylindrical material 13 onto the die 10 is completed in this manner, the extrusion punch 14 is lowered. By descending, the small diameter portion 14 of the extrusion punch 14
b fits into the hole of the cylindrical material 13, and furthermore, the step part 1
4c comes into contact with the upper end surfaces of the guide block 12 and the large diameter portion 13b of the cylindrical material 13, the guide block 12 and the cylindrical material 13 are pushed downward, and as shown in the right view of FIG. As shown, the sliding surface 1 of the guide block 12
2a slides along the inner surface of the guide die 10b, the bottom surface of the tooth forming section 11, and the inner surface of the tooth forming die 10a, and also slides along the small diameter section 1 of the cylindrical material 13.
A tooth profile is formed on the outer surface of 3c by the tooth forming part 11. Note that the retaining ring 15 descends together with the guide block 12.
第３図はこうして得られた薄肉の段付き円筒状
の成形品１６を示すもので、小径部１３ｃの外側
面に所望の歯形部１７が形成されているにもかか
わらず成形品１６には全く歪が生じていないこと
がわかる。 FIG. 3 shows the thus obtained thin-walled stepped cylindrical molded product 16, and although the desired tooth profile 17 is formed on the outer surface of the small diameter portion 13c, there is no part in the molded product 16. It can be seen that no distortion occurs.
（効果）
本発明は以上からあきらかなように、ガイドブ
ロツクと押出しパンチとを用い、これらを円筒素
材の内外両面に当接させるので、円筒素材が薄肉
であつても座屈なしに冷間押出成形をすることが
可能になり、したがつて歯形精度が向上し、素材
費の削減が可能になるとともに生産性が向上する
ことになる。(Effects) As is clear from the above, the present invention uses a guide block and an extrusion punch, and these are brought into contact with both the inner and outer surfaces of the cylindrical material, so even if the cylindrical material is thin, it can be cold extruded without buckling. This makes it possible to perform molding, thereby improving tooth profile accuracy, reducing material costs, and improving productivity.
第１図は本発明に係る装置の使用状態を示すも
ので中心線の左側は成形前の状態をまた右側は成
形後の状態を示す断面図、第２図は第１図のＡ−
Ａ線に沿う断面図、第３図ａは第１図の装置によ
つて得られた成形品の断面図、同図ｂは同図ａの
下面図、第４図は従来の装置の使用状態を示す第
１図相当図である。
１０……ダイス、１１……歯形成形部、１１ａ
……ガイド溝、１２……ガイドブロツク、１２ａ
……摺動面、１２ｂ……当接面、１３……円筒素
材、１４……押出しパンチ。
FIG. 1 shows the state in which the device according to the present invention is used. The left side of the center line shows the state before molding, the right side shows the state after molding, and FIG.
A sectional view taken along line A, FIG. 3a is a sectional view of a molded product obtained by the apparatus shown in FIG. 1, FIG. 3b is a bottom view of FIG. FIG. 1 is a diagram corresponding to FIG. 10...Dice, 11...Tooth formation part, 11a
...Guide groove, 12...Guide block, 12a
...Sliding surface, 12b ... Contact surface, 13 ... Cylindrical material, 14 ... Extrusion punch.
Claims (1)
に伸長するガイド溝を形成するとともに該ガイド
溝の幅よりも小さい肉厚を有し該ガイド溝の底面
に摺動自在な摺動面と、成形すべき薄肉円筒素材
の外側に当接自在な当接面とを備え、かつ該摺動
面と当接面との距離が前記ガイド溝の深さよりも
小さいガイドブロツクを設け、さらに押出しパン
チに、円筒素材の空孔に嵌合自在な小径部を形成
した冷間押出し成形装置。1. A guide groove extending in the axial direction of the die is formed in the tooth forming part of the die, and a sliding surface having a wall thickness smaller than the width of the guide groove and slidable on the bottom surface of the guide groove; A guide block is provided on the outside of the thin-walled cylindrical material to be formed and has a contact surface that can freely come into contact with the material, and the distance between the sliding surface and the contact surface is smaller than the depth of the guide groove. , a cold extrusion molding device that forms a small diameter part that can be freely fitted into a hole in a cylindrical material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4880085A JPS61206543A (en) | 1985-03-12 | 1985-03-12 | Cold extrusion forming equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4880085A JPS61206543A (en) | 1985-03-12 | 1985-03-12 | Cold extrusion forming equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61206543A JPS61206543A (en) | 1986-09-12 |
| JPH0563254B2 true JPH0563254B2 (en) | 1993-09-10 |
Family
ID=12813295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4880085A Granted JPS61206543A (en) | 1985-03-12 | 1985-03-12 | Cold extrusion forming equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61206543A (en) |
-
1985
- 1985-03-12 JP JP4880085A patent/JPS61206543A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61206543A (en) | 1986-09-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0910883A (en) | Formation of gear | |
| US4435973A (en) | Method of producing ring-shaped metal parts | |
| KR100321002B1 (en) | Cold forming method of toothed ring shaped article and molding apparatus using same | |
| JPS632531A (en) | Manufacture of spur gear | |
| JPH0563254B2 (en) | ||
| JPH0331537B2 (en) | ||
| US3079682A (en) | Method of manufacture of annular metal articles | |
| JPS5923894B2 (en) | How to manufacture gears from flat plate materials | |
| JPH0561015B2 (en) | ||
| JPH06297071A (en) | Formation of inner diameter spline | |
| JPS62238040A (en) | Cold forming method for hollow shaft like part with flange | |
| JPS6257414B2 (en) | ||
| JPS5678357A (en) | Manufacture of yoke for rotary electric machine | |
| JPS6255937B2 (en) | ||
| JPH07144247A (en) | Die for forging part with steps and method thereof | |
| SU1148689A2 (en) | Method of extruding cavity in the blank | |
| GB2219541A (en) | Expanding a tubular metal body | |
| ES448109A1 (en) | Method of manufacturing an extruded steel component | |
| JPS6092032A (en) | Method and apparatus for center hole working by cold extrusion forming | |
| JPH0747189B2 (en) | Extrusion molding method | |
| JPH04266445A (en) | Device for extruding gear | |
| JPS5870935A (en) | Manufacture of ring | |
| JPS6234641A (en) | Plasticity working method for bottomed thin wall pipe utilizing frictional force | |
| JPS6230856B2 (en) | ||
| JPH0452204A (en) | Production of gear and gear |