JPH0563255B2 - - Google Patents
Info
- Publication number
- JPH0563255B2 JPH0563255B2 JP17293285A JP17293285A JPH0563255B2 JP H0563255 B2 JPH0563255 B2 JP H0563255B2 JP 17293285 A JP17293285 A JP 17293285A JP 17293285 A JP17293285 A JP 17293285A JP H0563255 B2 JPH0563255 B2 JP H0563255B2
- Authority
- JP
- Japan
- Prior art keywords
- spline tooth
- spline
- forming
- tooth
- tip
- 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 - Fee Related
Links
- 239000000463 material Substances 0.000 claims description 28
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 239000000314 lubricant Substances 0.000 description 8
- 238000000465 moulding Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 235000013372 meat Nutrition 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- 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
- B21K1/00—Making machine elements
- B21K1/28—Making machine elements wheels; discs
- B21K1/30—Making machine elements wheels; discs with gear-teeth
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は自動車のトランスミツシヨン用ギア
の成形方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of forming gears for automobile transmissions.
（従来の技術）
自動車のトランスミツシヨン用ギアの１つに、
第３図に示す。例えば、特開昭58−65326号公報
の第１図に開示されたものがあるが、これをこの
ギア１の外周には等分に複数個のスプライン歯２
が設けられている。スプライン歯２は、前端部
（第３図で上方を前方、下方を後方と呼ぶことに
する）に相手側であるスリーブの内歯スプライン
との噛合を容易にするため断面三角刃状のチヤン
フア部３を有しており、また前端部から後端部に
亘つて前記スリーブの内歯スプラインの抜け防止
用の逆テーパが施された歯面４を有している。こ
の逆テーパが施された歯面４は前記スリーブの内
歯スプラインの対応した形状の歯面と係合し、ス
リーブの軸方向の移動（通常抜けと呼ばれる）を
防止する役目をもつものである。５はスプライン
歯２の谷部である。６はスプライン歯２の谷部５
の隣り合う２個のチヤンフア部３，３の間にそれ
ぞれ形成された凹部である。この凹部６を構成す
る凹曲面は、隣り合う２個のチヤンフア部３，３
の互いに対向し合うチヤンフア面７，８のスプラ
イン歯２の谷部５に位置する端部同士を一続きに
連続するように形成されている。９はチヤンフア
部３前端の稜線部前端面であり、１０はボス部で
ある。このようなギア１を成形するために従来使
用されていた鋳造型および素材の一例が第４図に
示してある。図中、１１は鋳造型の下型であり、
１２は下型１１に設けられたダイス孔である。こ
のダイス孔１２はギア１のスプライン歯２の歯先
径Ｄと同径に形成されており、その奥部の周面に
は複数のスプライン歯成形用の刃１３が等間隔内
歯状に設けられている。更に、ダイス孔１２の奥
部にはスプライン歯２のチヤンフア部３を成形す
る部分１４と、隣り合う２個のチヤンフア部３，
３の互いに対向し合うチヤンフア面７，８の谷部
５側の端部同士を一続きに連続する凹部６を成形
する部分１５と、ボス部１０を成形する部分１６
と、が設けられている。一方、１８は全体の図示
を省略した上型に設けられたパンチである。この
パンチ１８は先端面が平坦で、直径がギア１のス
プライン歯２の歯先径Ｄと同径であり、上型が下
型１１に接近するとき下型１１のダイス孔１２に
嵌入可能である。２０はギア１のスプライン歯２
の歯先径Ｄと同径の外径を有する略円盤状の素材
である。この素材２０は、スプライン歯２の歯先
が形成される外周部とスプライン歯２の歯元が形
成される中心寄りの部分との軸方向の肉厚が等し
くなつている。２１は一端中心部に設けられたボ
ス部である。(Prior art) One of the transmission gears of automobiles is
It is shown in Figure 3. For example, there is a gear disclosed in FIG. 1 of Japanese Patent Application Laid-open No. 58-65326, in which a plurality of spline teeth 2 are arranged equally on the outer circumference of the gear 1.
is provided. The spline tooth 2 has a front end portion (in Fig. 3, the upper side is referred to as the front and the lower side is referred to as the rear) to facilitate engagement with the internal spline of the mating sleeve. 3, and has a tooth surface 4 which is reversely tapered from the front end to the rear end to prevent the internal spline of the sleeve from coming off. This reversely tapered tooth surface 4 engages with a correspondingly shaped tooth surface of the internal spline of the sleeve, and serves to prevent the sleeve from moving in the axial direction (usually referred to as dislodgement). . 5 is a valley of the spline tooth 2. 6 is the valley part 5 of the spline tooth 2
These are recesses formed between two adjacent chamfer parts 3, 3, respectively. The concave curved surface constituting this concave portion 6 is formed between two adjacent chamfer portions 3, 3.
The ends of the chamfer surfaces 7, 8 facing each other, located in the valleys 5 of the spline teeth 2, are continuous with each other. 9 is a front end surface of a ridgeline portion at the front end of the channel portion 3, and 10 is a boss portion. An example of a casting mold and a material conventionally used to mold such a gear 1 is shown in FIG. In the figure, 11 is the lower mold of the casting mold,
12 is a die hole provided in the lower die 11. This die hole 12 is formed to have the same diameter as the tooth tip diameter D of the spline tooth 2 of the gear 1, and a plurality of blades 13 for forming spline teeth are provided in the shape of internal teeth at equal intervals on the inner peripheral surface of the die hole 12. It is being Further, in the deep part of the die hole 12, there is a part 14 for forming the chamfer part 3 of the spline tooth 2, and two adjacent chamfer parts 3,
A portion 15 for forming a concave portion 6 which is continuous between the ends of the chamfer surfaces 7 and 8 on the valley portion 5 side facing each other in No. 3, and a portion 16 for forming a boss portion 10.
and are provided. On the other hand, 18 is a punch provided on the upper die, the entire illustration of which is omitted. This punch 18 has a flat end surface, the diameter is the same as the tip diameter D of the spline teeth 2 of the gear 1, and can be inserted into the die hole 12 of the lower mold 11 when the upper mold approaches the lower mold 11. be. 20 is spline tooth 2 of gear 1
It is a substantially disk-shaped material having an outer diameter that is the same as the tooth tip diameter D. In this material 20, the thickness in the axial direction is equal between the outer peripheral part where the tips of the spline teeth 2 are formed and the part near the center where the roots of the spline teeth 2 are formed. 21 is a boss portion provided at the center of one end.
しかして、下型１１のダイス孔１２に素材２０
をボス部２１が下になるようにして挿入し、上型
を下降させてパンチ１８で素材２０をダイス孔１
２内に圧入し、素材２０をギア１に圧縮押込み成
形するのである。 Therefore, the material 20 is inserted into the die hole 12 of the lower mold 11.
Insert the material 20 with the boss part 21 facing down, lower the upper mold, and insert the material 20 into the die hole 1 with the punch 18.
The material 20 is press-fitted into the gear 1, and the material 20 is compressed and formed into the gear 1.
（発明が解決しようとする問題点）
しかしながら、このような従来の自動車トラン
スミツシヨン用ギアの成形方法にあつては、素材
としてスプライン歯２の歯先が形成される外周部
と歯元が形成される中心寄りの部分との軸方向の
肉厚が等しいものを使用していた。ところが、成
形時にはダイス孔１２のスプライン歯成形用の刃
１３部分に圧入された素材２０の肉がまずスプラ
イン歯２の歯先（外周）側から歯元側へと流動
し、歯元側に肉が充満した後逆に歯元側から歯先
側へと流動しながらスプライン歯２を形成してい
くため、ダイス孔１２内に供給されている潤滑剤
が素材２０の肉に押されて次第にスプライン歯２
の歯先部分およびチヤンフア部３の稜線部前端面
９部分に集まることとなる。その結果、この潤滑
剤によつて素材２０の肉の流動が阻まれ、スプラ
イン歯２の機能上最も重要な歯先部分およびチヤ
ンフア部３の稜線部前端面９部分に欠肉が生じる
ことになるといつた問題があつた。(Problems to be Solved by the Invention) However, in such a conventional method of forming a gear for an automobile transmission, the outer circumferential portion where the tip of the spline tooth 2 is formed and the root of the spline tooth 2 are formed as a material. The wall thickness in the axial direction was the same as that of the center part. However, during molding, the flesh of the material 20 press-fitted into the spline tooth forming blade 13 portion of the die hole 12 first flows from the tip (outer periphery) side of the spline tooth 2 to the root side, and the meat flows toward the root side. After the lubricant is filled, the spline tooth 2 is formed while flowing from the root side to the tooth tip side, so that the lubricant supplied inside the die hole 12 is pushed by the flesh of the material 20 and gradually forms the spline tooth. tooth 2
They gather at the tip of the tooth and the front end surface 9 of the ridgeline portion of the chamfer portion 3. As a result, this lubricant prevents the flow of the material 20, resulting in a lack of thickness in the tip of the spline tooth 2, which is the most important functional part, and in the front end surface 9 of the ridgeline of the chamfer part 3. I had a problem.
（問題点を解決するための手段および作用）
この発明はこのような従来の問題点に着目して
なされたもので、ギアのスプライン歯の歯先径と
同径であり、スプライン歯成形用の刃と、スプラ
イン歯のチヤンフア部を成形する部分と、隣り合
う２個のチヤンフア部の互いに対向し合うチヤン
フア面の谷部側の端部同士を一続きに連続する凹
部を成形する部分と、を備えたダイス孔に、外径
がスプライン歯の歯先径と略同径でスプライン歯
の歯先が成形される外周部の軸方向の肉厚をスプ
ライン歯の歯元が形成される中心寄りの部分の肉
厚よりも厚くした素材を、この素材と略同径の外
径を有するパンチで圧入することにより、成形時
に素材の肉をスプライン歯の歯先側から歯元側へ
と流動させ、潤滑剤がスプライン歯の歯先部およ
びチヤンフア部の稜線部前端面部分に溜らないよ
うにして、これらの部分に欠肉が生じるのを防止
したものである。(Means and effects for solving the problem) This invention was made by paying attention to such conventional problems. A blade, a part that molds the chimney part of the spline tooth, and a part that molds a concave part that continues the trough side ends of the chamfer surfaces facing each other of two adjacent chimney parts. The outer diameter is approximately the same as the tip diameter of the spline tooth, and the thickness in the axial direction of the outer periphery where the tip of the spline tooth is formed is placed in the die hole provided, near the center where the root of the spline tooth is formed. By press-fitting a material that is thicker than the wall thickness of the part with a punch that has approximately the same outer diameter as this material, the material flows from the tip side of the spline tooth to the root side during molding, This prevents the lubricant from accumulating on the tips of the spline teeth and the front end surface of the ridgeline portion of the chamfer, thereby preventing the occurrence of underfilling in these areas.
（実施例） 以下、この発明を図面に基づいて説明する。(Example) The present invention will be explained below based on the drawings.
第１図はこの発明に係る方法を実施するための
鋳造型の一実施例を示すものである。図中、３１
は下型であり、３２はこの下型３１に設けられた
ダイス孔である。このダイス孔３２はギア１のス
プライン歯２の歯先径Ｄと同径に形成されてお
り、その奥部の周面には等間隔に複数のスプライ
ン歯成形用の刃３３が内歯状に設けられている。
更に、ダイス孔３２の奥部にはスプライン歯２の
チヤンフア部３を成形する部分３４と、隣り合う
２個のチヤンフア部３，３の互いに対向し合うチ
ヤンフア部７，８の谷部５側の端部同士を一続き
に連続する凹部６を成形する部分３５と、ボス部
１０を成形する部分３６と、が設けられている。
一方、３８は全体の図示を省略した上型のパンチ
である。このパンチ３８は先端面が平坦で、その
直径はギア１のスプライン歯２の歯先径Ｄと同径
であり、上型が下型３１に接近するとき下型３１
のダイス孔３２に嵌入可能である。４０はギア１
のスプライン歯２の歯先径Ｄと同径の外径を有す
る略円盤状の素材である。この素材４０はその一
端面４０ａの中心部にボス部４１を有しており、
この一端面４０ａはボス部４１の根元から外周方
向へ行くにしたがつて軸方向に次第に突出し、肉
厚が厚くなつている。他端面４０ｂは平坦であ
る。 FIG. 1 shows an embodiment of a casting mold for carrying out the method according to the present invention. In the figure, 31
is a lower mold, and 32 is a die hole provided in this lower mold 31. This die hole 32 is formed to have the same diameter as the tooth tip diameter D of the spline tooth 2 of the gear 1, and a plurality of spline tooth forming blades 33 are arranged at equal intervals on the inner peripheral surface of the die hole 32 in the shape of internal teeth. It is provided.
Further, in the deep part of the die hole 32, there is a part 34 for forming the chamfer part 3 of the spline tooth 2, and a part 34 on the trough part 5 side of the chamfer part 7, 8 of the two adjacent chamfer parts 3, 3 which face each other. A portion 35 for forming the concave portion 6 and a portion 36 for forming the boss portion 10 are provided, the ends of which are continuous.
On the other hand, 38 is an upper die punch whose entire illustration is omitted. This punch 38 has a flat end surface, and its diameter is the same as the tip diameter D of the spline teeth 2 of the gear 1. When the upper mold approaches the lower mold 31, the lower mold 31
It can be fitted into the die hole 32 of. 40 is gear 1
It is a substantially disk-shaped material having an outer diameter that is the same as the tooth tip diameter D of the spline tooth 2. This material 40 has a boss portion 41 at the center of one end surface 40a,
This one end surface 40a gradually protrudes in the axial direction from the root of the boss portion 41 toward the outer circumference, and becomes thicker. The other end surface 40b is flat.
しかして、素材４０をボス部４１が設けられて
いる面側から先にダイス孔３２に挿入し、上型を
下降させてパンチ３８で素材４０をダイス孔３２
内に圧入する。スプライン歯成形用の刃３３によ
つてスプライン歯２を成形されつつダイス孔３２
の奥に圧入される素材４０は、スプライン歯２の
歯先部が形成される外周部の肉厚がスプライン歯
２の歯本部が形成される中心寄りの部分の肉厚よ
りも厚くなつているため、外周部（歯先部）の肉
が先にチヤンフア部３の稜線部前端面成形部分３
４に到達し、歯先側から歯元側へと肉が流動する
こととなる。その結果、潤滑剤は流動する肉に押
されてダイス孔３２の外周側から中心側へと移動
し、スプライン歯２の歯先部分やチヤンフア部３
の稜線部前端面９部分に溜ることはなく、したが
つてこれらの部分に潤滑剤に起因する欠肉が生ず
ることはない。 The material 40 is first inserted into the die hole 32 from the side where the boss portion 41 is provided, the upper mold is lowered, and the material 40 is inserted into the die hole 32 with the punch 38.
Press fit inside. The die hole 32 is formed while the spline tooth 2 is being formed by the spline tooth forming blade 33.
The material 40 that is press-fitted into the back of the spline tooth 2 is thicker at the outer periphery where the tips of the spline teeth 2 are formed than at the center portion where the tooth portions of the spline teeth 2 are formed. Therefore, the flesh on the outer periphery (tooth tip) first forms the ridgeline front end surface molding portion 3 of the chamfer portion 3.
4, the meat will flow from the tooth tip side to the tooth root side. As a result, the lubricant is pushed by the flowing meat and moves from the outer circumferential side of the die hole 32 to the center side, and the lubricant is moved to the tip of the spline tooth 2 and the chamfer part 3.
The lubricant does not accumulate on the front end surface 9 of the ridgeline portion, and therefore no under-filling occurs in these portions due to the lubricant.
第２図には、この発明に係る方法で使用する素
材の他の実施例が示してある。この実施例の素材
５０は、ボス部４１が設けられている一端面５０
ａがボス部４１の根元から外周まで平坦になつて
おり、他端面５０ｂが中心と外周との中間位置か
ら外周方向へ向かうにしたがつて軸方向に次第に
突出し肉厚が厚くなつている。素材５０の外径は
ギア１のスプライン歯２の歯先径Ｄと同径であ
る。この素材５０からギア１を成形する場合の作
用効果は前記実施例と同じである。 FIG. 2 shows another embodiment of the material used in the method according to the invention. The material 50 of this embodiment has one end surface 50 on which the boss portion 41 is provided.
a is flat from the root to the outer periphery of the boss portion 41, and the other end surface 50b gradually protrudes in the axial direction and becomes thicker as it goes toward the outer periphery from the intermediate position between the center and the outer periphery. The outer diameter of the material 50 is the same as the tip diameter D of the spline tooth 2 of the gear 1. The operation and effect when forming the gear 1 from this material 50 are the same as in the previous embodiment.
（発明の効果）
以上説明してきたようにこの発明によれば、機
能上最も重要なスプライン歯の歯先部分およびチ
ヤンフア部の稜線部前端面部分に欠肉のない自動
車のトランスミツシヨン用ギアを成形することが
できる。(Effects of the Invention) As described above, according to the present invention, an automobile transmission gear can be provided which has no underfill in the tip of the spline tooth and the front end surface of the ridgeline of the chamfer, which are the most functionally important parts. Can be molded.
第１図はこの発明に係る自動車のトランスミツ
シヨン用ギアの成形方法を実施するための鍛造型
および素材の一実施例の概略断面説明図、第２図
はこの発明に係る自動車のトランスミツシヨン用
ギアの成形方法の実施に使用する素材の他の実施
例の正面断面図、第３図は自動車のトランスミツ
シヨン用ギアの一例の概略斜視図、第４図は従来
の自動車のトランスミツシヨン用ギアの成形方法
の実施に使用されていた鍛造型および素材の概略
断面説明図である。
１……ギア、２……スプライン歯、３……チヤ
ンフア部、５……スプライン歯の谷部、６……凹
部、７，８……チヤンフア面、３２……ダイス
孔、３３……スプライン歯成形用の刃、３４……
チヤンフア部を成形する部分、３５……凹部を成
形する部分、３８……パンチ、４０，５０……素
材、Ｄ……スプライン歯の歯先径。
FIG. 1 is a schematic cross-sectional explanatory diagram of an embodiment of a forging die and material for carrying out the method of forming an automobile transmission gear according to the present invention, and FIG. 2 is a schematic cross-sectional view of an automobile transmission gear according to the present invention. FIG. 3 is a schematic perspective view of an example of an automobile transmission gear, and FIG. 4 is a conventional automobile transmission. FIG. 4 is a schematic cross-sectional explanatory diagram of a forging die and a raw material that were used to implement a method for forming gears. DESCRIPTION OF SYMBOLS 1...Gear, 2...Spline tooth, 3...Change surface, 5...Trough of spline tooth, 6...Recess, 7, 8...Change surface, 32...Die hole, 33...Spline tooth Molding blade, 34...
Part for forming the channel part, 35... Part for forming the recess, 38... Punch, 40, 50... Material, D... Tip diameter of spline tooth.
Claims (1)
ライン歯の前端には三角刃状のチヤンフア部が設
けられており、スプライン歯の谷部には隣り合う
２個のチヤンフア部の互いに対向し合うチヤンフ
ア面の谷部側の端部同士を一続きに連続する凹部
が設けられた自動車のトランスミツシヨン用ギア
の成形方法において、前記スプライン歯の歯先径
と同径であり、スプライン歯成形用の刃と、前記
チヤンフア部を成形する部分と、前記凹部を成形
する部分と、を備えたダイス孔に、外径がスプラ
イン歯の歯先径と略同径でスプライン歯の歯先が
形成される外周部の軸方向の肉厚をスプライン歯
の歯元が形成される中心寄りの部分の肉厚よりも
厚くした素材を、この素材と略同径の外径を有す
るパンチで圧入することを特徴とする自動車のト
ランスミツシヨン用ギアの成形方法。1 A plurality of spline teeth are provided on the outer periphery, and a triangular blade-shaped channel part is provided at the front end of the spline tooth, and two opposing channel parts of two adjacent channel parts are provided in the trough of the spline tooth. In a method for forming a gear for an automobile transmission in which a concave portion is provided continuously between the ends on the trough side of the surface, the concave portion has the same diameter as the tip diameter of the spline tooth, and a recess for forming the spline tooth. A tip of the spline tooth is formed in a die hole including a blade, a portion for forming the chamfer portion, and a portion for forming the concave portion, the outer diameter of which is approximately the same as the tip diameter of the spline tooth. A material whose outer circumference is thicker in the axial direction than the part near the center where the roots of the spline teeth are formed is press-fitted using a punch with an outer diameter that is approximately the same as the material. A method for forming gears for automobile transmissions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17293285A JPS6233038A (en) | 1985-08-05 | 1985-08-05 | Forming method for gear for transmission of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17293285A JPS6233038A (en) | 1985-08-05 | 1985-08-05 | Forming method for gear for transmission of automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6233038A JPS6233038A (en) | 1987-02-13 |
| JPH0563255B2 true JPH0563255B2 (en) | 1993-09-10 |
Family
ID=15951021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17293285A Granted JPS6233038A (en) | 1985-08-05 | 1985-08-05 | Forming method for gear for transmission of automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6233038A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4353941B2 (en) * | 2005-12-28 | 2009-10-28 | 大岡技研株式会社 | gear |
| DE102017007892A1 (en) * | 2017-08-19 | 2019-02-21 | Diehl Metall Stiftung & Co. Kg | Method for producing a synchronizer ring and associated synchronizer ring |
-
1985
- 1985-08-05 JP JP17293285A patent/JPS6233038A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6233038A (en) | 1987-02-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |