JPH0561015B2 - - Google Patents
Info
- Publication number
- JPH0561015B2 JPH0561015B2 JP11977185A JP11977185A JPH0561015B2 JP H0561015 B2 JPH0561015 B2 JP H0561015B2 JP 11977185 A JP11977185 A JP 11977185A JP 11977185 A JP11977185 A JP 11977185A JP H0561015 B2 JPH0561015 B2 JP H0561015B2
- Authority
- JP
- Japan
- Prior art keywords
- diameter
- tooth
- small
- forming
- small diameter
- 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 14
- 238000000034 method Methods 0.000 claims description 10
- 238000005242 forging Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 235000013372 meat Nutrition 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Forging (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は中空の歯車部品の内外径に形成される
溝を鍛造により成形するようにした成形方法に関
する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a forming method in which grooves formed on the inner and outer diameters of a hollow gear part are formed by forging.
（従来の技術）
この種方法としては、押出し成形やしごき成形
により内外径の溝の１つだけを鍛造により成形
し、残りの溝は、鍛造により成形された溝を基準
として歯切りやブローチのような機械加工又は転
造で成形するのを一般とした。(Prior art) In this type of method, only one of the grooves on the inner and outer diameters is formed by forging by extrusion molding or ironing, and the remaining grooves are formed by gear cutting or broaching based on the groove formed by forging. It was generally formed by machining or rolling.
（発明が解決しようとする問題点）
そのため大径部と小径部とを有する中空部品の
内外径に溝を作るような場合には少なくとも３つ
の溝が存在し、それを別々に加工することは合理
的でなく、又、これを鍛造により同時成形しよう
としても中空部品形状が単純な円筒でなく内径、
外径とも大きな段差を有するので成形時には金型
との非拘束部が存在し、且つ外周の溝成形は、内
周の溝成形に影響を与えるので、金型非拘束部へ
の材料肉の盛り上りやバリの発生、欠肉の問題が
あつた。(Problem to be solved by the invention) Therefore, when creating grooves on the inner and outer diameters of a hollow part having a large diameter part and a small diameter part, there are at least three grooves, and it is not possible to process them separately. It is not reasonable, and even if you try to simultaneously form this by forging, the shape of the hollow part is not a simple cylinder, but the inner diameter,
Since both the outer diameter and the outside diameter have a large step, there is a part that is not constrained by the mold during molding, and the groove forming on the outer periphery affects the groove forming on the inner periphery, so it is difficult to fill the material into the unrestricted part of the mold. There were problems with rising, burrs, and lack of meat.
（問題点を解決するための手段）
本発明はかかる問題点を解決することを目的と
したもので、大径歯形成形ダイの歯形を介して中
空部品の大径部外周に溝を形成すると共に、下パ
ンチの歯形と、小径歯形成形ダイの歯形とを介し
て中空部品の小径部の内外周に溝を形成するよう
にした中空部品の内外径溝の成形方法において、
前記中空部品の素材の大径部外径を前記大径歯形
成形ダイの歯形の外形と略同径に設定すると共
に、前記中空部品の素材の小径部の内外径と、前
記下パンチの歯形と、前記小径歯形成形ダイの歯
形との各中間径と略同径に設定して、小径部の内
外周先端部を前記小径歯形成形ダイと下パンチと
に同時に衝合させて成形を開始し、次いで前記大
径部を成形することを特徴とする。(Means for Solving the Problems) The present invention is aimed at solving the above problems, and involves forming a groove on the outer periphery of a large diameter portion of a hollow component through the tooth profile of a large diameter tooth forming die. In a method for forming inner and outer diameter grooves of a hollow part, the grooves are formed on the inner and outer peripheries of the small diameter part of the hollow part through the tooth profile of the lower punch and the tooth profile of the small diameter tooth forming die,
The outer diameter of the large diameter part of the material of the hollow part is set to be approximately the same as the outer diameter of the tooth profile of the large diameter tooth forming die, and the inner and outer diameter of the small diameter part of the material of the hollow part and the tooth profile of the lower punch. , set the diameter to be approximately the same as each intermediate diameter with the tooth profile of the small-diameter tooth-forming die, and start molding by abutting the inner and outer circumferential tips of the small-diameter portion against the small-diameter tooth-forming die and the lower punch at the same time; The method is characterized in that the large diameter portion is then molded.
（実施例）
以下本発明の一実施例を図面に基づいて説明す
ると、図は大径部１ａと該大径部１ａから段差１
ｂをもつて延出される小径部１ｃとからなる中空
素材１の大径部１ａ外周にギヤからなる溝を成形
すると共に、小径部１ｃの内外径にスプラインか
らなる溝を形成する場合を示し、そのダイ２は前
記大径部１ａのギヤを形成すべき大径歯形成形ダ
イ３と、前記小径部１ｃの外周スプラインを形成
すべき小径歯形成形ダイ４とを前後に重合して設
けられ、その上部にコンテナー５を載置すると共
に、その下部にダイスペース６を設け、更にその
ダイ穴内には前記小径部１ｃの内周スプラインを
形成すべき下パンチ７がダイスペーサ６に支承さ
れて設けられている。又該ダイ２に対向して設け
られる上パンチ８は、前記素材１の大径部の環状
上面を押圧する環状のアウタパンチ８ａと、該パ
ンチ８ａ内に内挿されて、前記素材１の大径部の
内径内に嵌挿されるインナパンチ８ｂとから形成
されている。図中９は下パンチ７の上面に突設し
た案内部、１０はノツクアウトピン、１１はダイ
２のガイドリングを示す。(Embodiment) An embodiment of the present invention will be described below based on the drawings. The figure shows a large diameter portion 1a and a step 1 from the large diameter portion 1a
A case is shown in which a groove made of a gear is formed on the outer periphery of the large diameter part 1a of the hollow material 1, which consists of a small diameter part 1c extending with a radius of 1c, and a groove made of a spline is formed on the inner and outer diameters of the small diameter part 1c. The die 2 is provided by overlapping a large-diameter tooth-forming die 3 for forming the gear of the large-diameter portion 1a and a small-diameter tooth-forming die 4 for forming the outer peripheral spline of the small-diameter portion 1c back and forth. A container 5 is placed on the upper part, a die space 6 is provided in the lower part thereof, and a lower punch 7 for forming the inner peripheral spline of the small diameter portion 1c is provided in the die hole and is supported by the die spacer 6. There is. Further, an upper punch 8 provided opposite to the die 2 includes an annular outer punch 8a that presses the annular upper surface of the large diameter portion of the material 1, and an annular outer punch 8a that is inserted into the punch 8a and presses the annular upper surface of the large diameter portion of the material 1. The inner punch 8b is fitted into the inner diameter of the inner punch 8b. In the figure, reference numeral 9 indicates a guide portion protruding from the upper surface of the lower punch 7, reference numeral 10 indicates a knockout pin, and reference numeral 11 indicates a guide ring of the die 2.
上述の装置を用いた成形過程を第２図について
説明すると、素材１は第２図ａで示すように小径
部１ｃの先端を下パンチ７の案内部９に嵌挿され
て拘束されると共に、その大径部１ａの後端を、
インナパンチ８ｂに嵌挿されて拘束されながら第
２図ｂに示すようにアウタパンチ８ａでその上端
面を押されて小径部１ｃが小径歯形成形ダイ４と
下パンチ７とで絞られながら成形されるものであ
る。 The forming process using the above-mentioned device will be explained with reference to FIG. 2. As shown in FIG. 2a, the material 1 is restrained by fitting the tip of the small diameter portion 1c into the guide portion 9 of the lower punch 7. The rear end of the large diameter portion 1a,
While being fitted and restrained by the inner punch 8b, its upper end surface is pushed by the outer punch 8a as shown in FIG. 2b, and the small diameter portion 1c is formed while being squeezed by the small diameter tooth forming die 4 and the lower punch 7. It is something.
そしてその際小径部１ｃの内径溝の成形に関し
てのみみれば、第３図に示すように、その内径d3
を下パンチ７の歯形外径d2と略等しくとり、小径
部１ｃの外周を絞つてその内周を下パンチ７に倣
せるのが溝の精度並び型寿命の上からも最も好ま
しいが、かくするときは小径部１ｃの外径溝の成
形率が大き過ぎて、その溝の精度が悪く、しかも
小径部１ｃの外周は型により拘束されないので肉
を小径歯形成形ダイ４の入口上で座屈する問題を
生じ、これを防止するため非拘束状態で押出され
る小径部外径d6をその外径溝成形に適するまで小
さくしてその絞り率を少くすると今度は内径溝の
精度が悪くなる問題を生じ、又内径溝も絞り成形
で出すように小径部内径d3を下パンチ７の歯形内
径d1に略等しく設定するときは内径溝成形と外径
溝成形の合成になるので小径部内径d3は下パンチ
７の案内部９で拘束されているから問題はないと
しても、小径歯形成形ダイ４の入口上の非拘束部
の肉が盛り上り、これが絞りの最後まで残り、段
差部１ｂの近傍に差込んで欠陥となるのみなら
ず、外径溝は潤滑膜が切れてカジリが多く内外溝
とも精度が悪くなる問題を生ずる。 At that time, if we only consider forming the inner diameter groove of the small diameter portion 1c, as shown in Fig. 3, its inner diameter d 3
It is most preferable from the viewpoint of groove accuracy and die life to make the outer circumference of the small diameter portion 1c approximately equal to the outer diameter d2 of the tooth profile of the lower punch 7, and to narrow the outer circumference of the small diameter portion 1c so that its inner circumference can follow the lower punch 7. In this case, the molding rate of the outer diameter groove of the small diameter portion 1c is too large, the precision of the groove is poor, and the outer periphery of the small diameter portion 1c is not restrained by the mold, so the meat buckles on the entrance of the small diameter tooth forming die 4. In order to prevent this problem, the outer diameter d6 of the small diameter part extruded in an unrestrained state is reduced until it is suitable for forming the outer diameter groove, and the drawing ratio is reduced, which then causes the accuracy of the inner diameter groove to deteriorate. When setting the small diameter part inner diameter d 3 to be approximately equal to the tooth profile inner diameter d 1 of the lower punch 7 so that the inner diameter groove is also formed by drawing, the inner diameter of the small diameter part is a combination of inner diameter groove forming and outer diameter groove forming. d 3 is restrained by the guide part 9 of the lower punch 7, so there is no problem, but the flesh of the unrestricted part above the entrance of the small-diameter tooth forming die 4 swells up and remains until the end of drawing, and the stepped part 1b Not only does it cause a defect if it is inserted in the vicinity of the groove, but the lubricating film in the outer diameter groove is cut and there are many galling problems, resulting in poor accuracy for both the inner and outer grooves.
本発明は上述の種々のテストの結果最良の方法
を得たもので、小径部１ｃの先端コーナ部には段
差１２を形成すると共に、小径部歯形成形ダイ４
の入口には導入段差１３を設け、小径部内径d3を
下パンチ７の歯形内径d1と歯形外径d2との略中間
径即ちd3P7d1＋d2／２に設定すると共に小径部外
径d6を小径歯形成形ダイ４の歯形内径d4と歯形外
径d5との略中間径即ちd6P7d4＋d5／２に設定する
ことにより小径部内径d3は下パンチ７の案内部９
で拘束されて座屈することなく絞られその分小径
部外径d6側にプラスされ、小径部外径d6は最適な
非拘束押出しとなつて両者バランスよく成形が進
み、精度のよい内外溝が得られた。なお小径歯形
成形ダイ４の導入段差１３は成形開始での肉のは
み出しを押え型で小径部１ｃの外周を拘束するこ
とによつて材料内に圧縮力を働かせて均一かつ良
好に成形させるもので、また材料のはみ出しが防
止されるので潤滑油が切れることなくきれいな歯
面に仕上げ製品の段差部１ｂを滑らかにつなき、
更に小径部１ｃの段差１２は型への案内になると
共に、変形に要する急激な圧力上昇を防ぎ、成形
開始の非定常状態での肉の外周盛り上りを制御し
ている。 In the present invention, the best method was obtained as a result of the various tests described above, and a step 12 is formed at the tip corner of the small diameter portion 1c, and a tooth forming die 4 for the small diameter portion is formed.
An introduction step 13 is provided at the entrance of the lower punch 7, and the inner diameter d 3 of the small diameter portion is set to approximately the middle diameter between the inner diameter d 1 of the tooth profile and the outer diameter d 2 of the tooth profile of the lower punch 7, that is, d 3 P 7 d 1 + d 2 /2. By setting the outside diameter d 6 of the small diameter portion to approximately the middle diameter between the inside diameter d 4 of the tooth profile and the outside diameter d 5 of the tooth profile of the small diameter tooth forming die 4, that is, d 6 P 7 d 4 + d 5 /2, the inside diameter d 3 of the small diameter portion is Guide part 9 of lower punch 7
The outer diameter d6 of the small diameter part is added to the outside diameter d6 of the small diameter part without buckling, and the outer diameter d6 of the small diameter part is optimally unrestrained extrusion, and the forming progresses in a well-balanced manner, creating accurate inner and outer grooves. was gotten. The introduction step 13 of the small-diameter tooth-forming die 4 is designed to prevent the meat from protruding at the start of forming by restraining the outer periphery of the small-diameter portion 1c with a presser die, thereby exerting a compressive force within the material and molding the material uniformly and well. In addition, since the material is prevented from extruding, the lubricating oil does not run out and the stepped part 1b of the finished product is smoothly connected to the clean tooth surface.
Further, the step 12 of the small diameter portion 1c serves as a guide to the mold, prevents a sudden pressure increase required for deformation, and controls the rise of the outer circumference of the meat in an unsteady state at the start of molding.
このようにして小径部１ｃの内外の溝の成形に
つれて更にアウタパンチ８ａが下がると大径部１
ａの溝の成形が始まるが、大径部１ａの外径は大
径歯形成形ダイ３の外径と略同径に形成してその
内外をインナパンチ８ｂとコンテナー５とで拘束
されてひけのない良好な溝即ちギヤが得られるよ
うにした。なおこの場合大径部１ａの外径を例え
ば大径歯形成形ダイ３の内径と外径との略中間径
に設定するときは歯のモジユールが1.5以上の大
きな場合には歯の外径部が出にくい問題が生ず
る。 In this way, as the inner and outer grooves of the small diameter portion 1c are formed, the outer punch 8a is further lowered, and the large diameter portion 1c is lowered.
Forming of the groove a starts, but the outer diameter of the large diameter portion 1a is formed to be approximately the same as the outer diameter of the large diameter tooth forming die 3, and its inner and outer sides are restrained by the inner punch 8b and the container 5 to prevent sinkage. This makes it possible to obtain good grooves or gears without any problems. In this case, when the outer diameter of the large diameter portion 1a is set to approximately the middle diameter between the inner diameter and outer diameter of the large diameter tooth forming die 3, if the tooth module is larger than 1.5, the outer diameter portion of the tooth A difficult problem arises.
（発明の効果）
このように本発明によるときは、中空部品の素
材１の大径部１ａの外径を、大径歯形成形ダイ３
の歯形の外径と略同径に設定すると共に、小径部
１ｃの内外径を下パンチ７の歯形と小径歯形成形
ダイ４の歯形との各中間径と略同径に設定して小
径部１ｃの内外周先端部を小径歯形成形ダイ４と
下パンチ７とに衝合させて同時に成形を開始し次
いで大径部１ａを成形させたものであるから鍛造
による同時成形によるも型くずれのない精度のよ
い３つの溝が形成でき、その作業能率を著しく向
上できる効果を有する。(Effects of the Invention) According to the present invention, the outer diameter of the large diameter portion 1a of the material 1 of the hollow part is adjusted to the diameter of the large diameter tooth forming die 3.
The outer diameter of the small diameter portion 1c is set to be approximately the same as the outer diameter of the tooth profile of the small diameter portion 1c, and the inner and outer diameter of the small diameter portion 1c is set to be approximately the same diameter as each intermediate diameter between the tooth profile of the lower punch 7 and the tooth profile of the small diameter tooth forming die 4. The tips of the inner and outer peripheries of the die are brought into contact with the small diameter tooth forming die 4 and the lower punch 7, and forming is started at the same time, and then the large diameter part 1a is formed. Therefore, even when simultaneously formed by forging, the precision can be maintained without deformation. Three good grooves can be formed and the work efficiency can be significantly improved.
第１図は本発明の方法を実施する装置の縦断面
図、第２図はその製造過程を示す説明図、第３図
は素材寸法と金型寸法の関係を示す説明図であ
る。
１……素材、１ａ……大径部、１ｃ……小径
部、３……大径歯形成形ダイ、４……小径歯形成
形ダイ、７……下パンチ。
FIG. 1 is a longitudinal sectional view of an apparatus for carrying out the method of the present invention, FIG. 2 is an explanatory diagram showing the manufacturing process thereof, and FIG. 3 is an explanatory diagram showing the relationship between material dimensions and mold dimensions. 1...Material, 1a...Large diameter part, 1c...Small diameter part, 3...Large diameter tooth forming die, 4...Small diameter tooth forming die, 7...Lower punch.
Claims (1)
大径部外周に溝を形成すると共に、下パンチの歯
形と、小径歯形成形ダイの歯形とを介して中空部
品の小径部の内外周に溝を形成するようにした中
空部品の内外径溝の成形方法において、前記中空
部品の素材の大径部外径を前記大径歯形成形ダイ
の歯形の外径と略同径に設定すると共に、前記中
空部品の素材の小径部の内外径を、前記下パンチ
の歯形と、前記小径歯形成形ダイの歯形との各中
間径と略同径に設定して、小径部の内外周先端部
を前記小径歯形成形ダイと下パンチとに同時に衝
合させて成形を開始し、次いで前記大径部を成形
することを特徴とする中空部品の内外径溝の成形
方法。1. A groove is formed on the outer periphery of the large diameter part of the hollow part through the tooth profile of the large diameter tooth forming die, and a groove is formed on the inner and outer periphery of the small diameter part of the hollow part via the tooth profile of the lower punch and the tooth profile of the small diameter tooth forming die. In a method for forming inner and outer diameter grooves of a hollow part in which a groove is formed, the outer diameter of the large diameter part of the material of the hollow part is set to be approximately the same diameter as the outer diameter of the tooth profile of the large diameter tooth forming die; The inner and outer diameters of the small diameter portion of the material of the hollow part are set to be approximately the same as the respective intermediate diameters of the tooth profile of the lower punch and the tooth profile of the small diameter tooth forming die, and the tips of the inner and outer periphery of the small diameter portion are 1. A method for forming inner and outer diameter grooves of a hollow part, characterized in that forming is started by simultaneously abutting a small-diameter tooth-forming die and a lower punch, and then forming the large-diameter portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11977185A JPS61279330A (en) | 1985-06-04 | 1985-06-04 | Forming method for inside and outside diameter groove of hollow parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11977185A JPS61279330A (en) | 1985-06-04 | 1985-06-04 | Forming method for inside and outside diameter groove of hollow parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61279330A JPS61279330A (en) | 1986-12-10 |
| JPH0561015B2 true JPH0561015B2 (en) | 1993-09-03 |
Family
ID=14769797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11977185A Granted JPS61279330A (en) | 1985-06-04 | 1985-06-04 | Forming method for inside and outside diameter groove of hollow parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61279330A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5732586A (en) * | 1996-09-19 | 1998-03-31 | Ford Global Technologies, Inc. | Cold extrusion for helical gear teeth |
| JP2001276955A (en) * | 2000-03-30 | 2001-10-09 | Aida Eng Ltd | Tooth form parts with shaft and its forming method |
| JP6398659B2 (en) * | 2014-11-28 | 2018-10-03 | アイシン・エィ・ダブリュ株式会社 | Tooth profile part manufacturing method and tooth profile part manufacturing apparatus |
-
1985
- 1985-06-04 JP JP11977185A patent/JPS61279330A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61279330A (en) | 1986-12-10 |
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