JPH0534833Y2 - - Google Patents
Info
- Publication number
- JPH0534833Y2 JPH0534833Y2 JP14141588U JP14141588U JPH0534833Y2 JP H0534833 Y2 JPH0534833 Y2 JP H0534833Y2 JP 14141588 U JP14141588 U JP 14141588U JP 14141588 U JP14141588 U JP 14141588U JP H0534833 Y2 JPH0534833 Y2 JP H0534833Y2
- Authority
- JP
- Japan
- Prior art keywords
- tooth
- die
- spline
- synchronizing
- spline teeth
- 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
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000005242 forging Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 230000001360 synchronised effect Effects 0.000 claims description 12
- 238000000465 moulding Methods 0.000 description 9
- 239000002184 metal Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010273 cold forging Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Forging (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は、自動車のシンクロメツシユ型変速機
に用いられる同期用スプライン歯を有する変速歯
車を鍛造成形する為の型鍛造金型に関し、更に詳
しくは、同期用スプライン歯部分を鍛造成形する
同期歯成形鍛造金型に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a die forging die for forging a transmission gear having synchronizing spline teeth used in a synchronized mesh type transmission of an automobile, and further relates to Specifically, the present invention relates to a synchronous tooth forming forging die for forging a synchronous spline tooth portion.
［従来技術及びその課題］
従来より、シンクロメツシユ機構を有する自動
車の変速機の変速用歯車に第６図の如く回転速度
を同期させる為のスプライン歯１を一体に形成し
たものがある。この同期用スプライン歯１を変速
歯車部２の側端面２Ａに連続させたものがあり、
こうすることにより、連続していない物に比較し
て同期用スプライン歯１の強度を高くできる。[Prior Art and its Problems] Conventionally, as shown in FIG. 6, there is a transmission gear for an automobile having a synchronized mesh mechanism, in which a spline tooth 1 for synchronizing the rotational speed is integrally formed. There is one in which this synchronizing spline tooth 1 is continuous with the side end surface 2A of the speed change gear part 2,
By doing so, the strength of the synchronizing spline teeth 1 can be increased compared to those that are not continuous.
このような同期用スプライン歯１の成形は、一
般に型鍛造により行なわれる。（特公昭49−11543
号公報参照）
即ち、複数回の型鍛造によつて変速用歯車全体
の形状と同期用スプライン歯の歯形を徐々に成形
し、最後に同期用スプライン歯のみを冷間鍛造に
より仕上成形するものである。 Forming of such a synchronizing spline tooth 1 is generally performed by die forging. (Tokuko Showa 49-11543
In other words, the overall shape of the transmission gear and the tooth profile of the synchronizing spline teeth are gradually formed by die forging multiple times, and finally only the synchronizing spline teeth are finished by cold forging. be.
尚、変速歯車部２は後に切削加工により歯切り
形成される。 Incidentally, the transmission gear portion 2 is later formed with gears by cutting.
同期用スプライン歯の仕上成形は、仕上ダイス
により変速歯車部の同期用スプライン歯形成側の
側端面を基準として行なわれる。 The finishing molding of the synchronizing spline teeth is performed using a finishing die with reference to the side end surface of the speed change gear portion on the side where the synchronizing spline teeth are formed.
仕上ダイスには、この変速歯車部の基準側端面
が当接する受圧基準面と所望仕上形状のスプライ
ン歯型が形成されており、前工程で所望するスプ
ライン歯形状より長く且つ細く粗成形されたスプ
ライン歯部をスプライン歯型部に挿入した後、変
速歯車部の他側面をパンチでダイス側に変速歯車
部の基準側端面が受圧基準面に当接する迄押圧
し、粗成形されたスプライン歯部を塑性変形させ
てスプライン歯型内に充満させることにより所望
の形状及び寸法の同期用スプライン歯を形成する
ものである。 The finishing die is formed with a pressure-receiving reference surface that the reference side end surface of this speed change gear portion comes into contact with, and a spline tooth shape with a desired finishing shape, and the spline rough-formed to be longer and thinner than the desired spline tooth shape in the previous process. After inserting the tooth part into the spline tooth mold part, press the other side of the speed change gear part against the die side with a punch until the reference side end face of the speed change gear part comes into contact with the pressure receiving reference surface, and then press the roughly formed spline tooth part. By plastically deforming and filling the spline tooth mold, a synchronizing spline tooth of a desired shape and size is formed.
しかし乍ら、上記の如き型鍛造工程で成形する
場合、粗成形のスプライン歯部はスプライン歯型
内への充填不足による成形不良を防ぐ為に仕上成
形時に僅に肉が余るように設定されるものであ
る。その結果、この余肉が仕上成形時に受圧基準
面と歯車部の基準側端面との間に介入して圧延変
形されることとなり、これにより受圧基準面と変
速歯車部の基準側端面との当接が不充分となつて
同期用スプライン歯の仕上寸法精度が悪化し、
又、受圧基準面と変速歯車部の基準側端面との間
で薄く圧延された余肉は、第７図示の如く同期用
スプライン歯１の変速歯車部側面２Ａ（基準側端
面）側の根元部分に変速歯車部側面２Ａに沿つて
極く薄く（約0.1〜0.2mm）脱落し易いバリ１Ａと
なり、当該変速歯車が変速機内に装着された後の
作動時にこのバリ１Ａが脱落すると、噛合してい
る歯車間に噛み込まれて歯車が欠損する等、故障
の原因となるという問題があるものであつた。 However, when forming using the die forging process as described above, the spline tooth portion of the rough forming is set so that there is a slight surplus of flesh during the final forming to prevent forming defects due to insufficient filling into the spline tooth die. It is something. As a result, this extra thickness intervenes between the pressure-receiving reference surface and the reference-side end surface of the gear part during finishing forming and is deformed by rolling, which causes the pressure-receiving reference surface to come into contact with the reference-side end surface of the transmission gear part. Due to insufficient contact, the finished dimensional accuracy of the synchronizing spline teeth deteriorates.
Further, the thinly rolled extra thickness between the pressure receiving reference surface and the reference side end surface of the transmission gear portion is the root portion of the transmission gear portion side surface 2A (reference side end surface) side of the synchronization spline tooth 1 as shown in FIG. There is a very thin (approximately 0.1 to 0.2 mm) burr 1A along the side surface 2A of the speed change gear part, which easily falls off. If this burr 1A falls off during operation after the speed change gear is installed in the transmission, it will engage. However, there was a problem in that the gears could become jammed between the gears, causing failures such as the gears becoming damaged.
［考案の目的］
本考案は、上記の如き事情に鑑み、精度の高い
成形が可能であると共に、余肉を脱落不能な状態
に成形することのできる同期歯成形鍛造金型の提
供、をその目的とする。[Purpose of the invention] In view of the above-mentioned circumstances, the present invention aims to provide a synchronous tooth forming forging die that is capable of high-precision forming and is also capable of forming excess metal in a state where it cannot fall off. purpose.
［考案の構成］
このため、本考案に係る同期歯成形鍛造金型
は、ダイスの同期用スプライン歯の成形型部を、
歯車素材の同期用スプライン歯形成側の側端面と
当接する受圧基準面から所定間隔離して形成した
ものである。[Configuration of the invention] Therefore, the synchronous tooth forming forging mold according to the invention has a mold part for the synchronous spline teeth of the die,
It is formed at a predetermined distance from the pressure receiving reference surface that comes into contact with the side end surface of the gear material on the side where the synchronizing spline teeth are formed.
このように構成することにより、仕上成形時に
於て余肉は受圧基準面と同期用スプライン歯の成
形型部との所定間隔内に逃げることとなり、この
間隔を適宜設定することにより余肉部の形状を脱
落不能な形状にできると共に余肉が受圧基準面と
変速歯車部の基準側端面との間に侵入することは
なく、成形精度が悪化することもないものであ
る。 With this configuration, during finishing molding, excess metal escapes within a predetermined interval between the pressure receiving reference surface and the mold part of the synchronization spline tooth, and by setting this interval appropriately, the excess thickness can be reduced. The shape can be made into a shape that cannot be removed, and excess metal will not enter between the pressure-receiving reference surface and the reference-side end surface of the transmission gear portion, and molding accuracy will not deteriorate.
［考案の実施例］
以下、本考案の実施例を図面に基づいて説明す
る。[Embodiments of the invention] Hereinafter, embodiments of the invention will be described based on the drawings.
第１図は本考案の一実施例を適用した型鍛造ダ
イス２０の一部破断斜視図であり、第２図Ａはそ
の断面図、Ｂは歯型部２２の正面図である。 FIG. 1 is a partially cutaway perspective view of a die forging die 20 to which an embodiment of the present invention is applied, FIG. 2A is a sectional view thereof, and FIG.
型鍛造ダイス２０には、変速歯車の基準側端面
である同期用スプライン歯１を形成する側の側端
面が当接する受圧基準面２１と、同期用スプライ
ン歯１を鍛造成形する歯型部２２が形成されてい
る。 The die forging die 20 includes a pressure-receiving reference surface 21 on which the side end surface on which the synchronization spline teeth 1, which is the reference side end surface of the speed change gear, is formed comes into contact, and a tooth mold part 22 for forging the synchronization spline teeth 1. It is formed.
歯型部２２には、凹状のスプライン歯型２２Ａ
が所定間隔で形成されており、前工程で概略同形
状まで粗成形された同期用スプライン歯が該スプ
ライン歯型２２Ａに塑性変形して充填されること
により所定形状且つ所定寸法に成形されるように
なつている。 The tooth pattern part 22 has a concave spline tooth pattern 22A.
are formed at predetermined intervals, and the synchronization spline teeth roughly formed to approximately the same shape in the previous step are plastically deformed and filled into the spline tooth mold 22A, so that the spline teeth are formed into a predetermined shape and size. It's getting old.
ここで、同期用スプライン歯１は歯車部の側面
と連接して形成されることから、通常なら歯型２
２Ａは受圧基準面２１から直接凹状に形成される
が、本考案では、スプライン歯型２２Ａの形成開
始面を（即ち歯型部開始面２２Ｂを）受圧基準面
２１からリング状に受圧基準面２１から所定量Ｘ
引つ込ませて形成してある。即ち、スプライン歯
型２２Ａの歯先部より外側（外周寄り）の部分を
受圧基準面２１とすると共に少なくともスプライ
ン歯型２２Ａの歯先部より内側部分（内周寄り部
分）は所定量Ｘ落ち込んだ歯型部開始面２２Ｂと
なつており、成形時に於ても該歯型部開始面２２
Ｂと変速歯車の基準側端面とは当接せず、所定間
隔Ｘを有するようになつている。 Here, since the synchronizing spline tooth 1 is formed in connection with the side surface of the gear part, normally the tooth pattern 2
2A is formed in a concave shape directly from the pressure receiving reference surface 21, but in the present invention, the formation start surface of the spline tooth pattern 22A (that is, the tooth pattern part starting surface 22B) is formed in a ring shape from the pressure receiving reference surface 21. from a predetermined amount
It is retracted and formed. That is, the part outside (near the outer periphery) of the spline tooth profile 22A is set as the pressure receiving reference surface 21, and at least the part inside the tooth tip (near the inner circumference) of the spline tooth profile 22A is depressed by a predetermined amount X. This is the tooth pattern starting surface 22B, and the tooth pattern starting surface 22B is also formed during molding.
B and the reference side end surface of the speed change gear do not come into contact with each other, but are spaced apart from each other by a predetermined distance X.
このように形成されたダイス２０を用い、第３
図乃至第４図の如く同期用スプライン歯１の仕上
成形を行なう。 Using the die 20 thus formed,
The synchronizing spline teeth 1 are then finish formed as shown in FIGS.
即ち、歯車素材１０を、歯型部２２の歯型２２
Ａに粗成形された同期用スプライン歯を一致させ
てダイス２０に挿置し、歯車素材１０の中央の開
口にマンドレル４０を嵌合挿入して固定する。そ
の後、パンチ３０を下降させて歯車素材１０をダ
イス２０側に押圧し（第４図示）、粗成形されて
いた同期用スプライン歯部分を塑性変形させてス
プライン歯型２２内に充填することにより所定形
状・寸法の同期用スプライン歯１を形成する。 That is, the gear material 10 is
The roughly formed synchronization spline teeth A are aligned and inserted into the die 20, and the mandrel 40 is fitted and inserted into the central opening of the gear material 10 and fixed. Thereafter, the punch 30 is lowered to press the gear material 10 toward the die 20 (as shown in the fourth figure), and the rough-formed synchronization spline tooth portion is plastically deformed and filled into the spline tooth mold 22 to form a predetermined shape. Spline teeth 1 for synchronization of shape and dimensions are formed.
仕上成形前の粗成形された同期用スプライン歯
部分の体積はダイス２０により仕上成形された後
の同期用スプライン歯１の体積より所定量多く設
定されており、この両者の差は余肉となつて仕上
成形時にスプライン歯型２２の外に押し出され
る。本構成では、この余肉は、受圧基準面２１と
歯型部開始面２２Ｂとの間の間隙内にはみ出すこ
ととなる。即ち、仕上成形後の同期用スプライン
歯１は、第５図に示す如き形状となり、同期用ス
プライン歯１の基準側端面２Ａ側の根元部分に、
受圧基準面２１と歯型部開始面２２Ｂとの間隔Ｘ
と等しい厚さＸの余肉の突起１Ｂが形成される。 The volume of the roughly formed synchronous spline tooth portion before final forming is set to be larger by a predetermined amount than the volume of the synchronous spline tooth 1 after final forming with the die 20, and the difference between the two is the excess material. and is extruded out of the spline tooth die 22 during final molding. In this configuration, this extra thickness protrudes into the gap between the pressure receiving reference surface 21 and the toothed part starting surface 22B. That is, the synchronizing spline tooth 1 after finishing molding has a shape as shown in FIG.
Distance X between pressure receiving reference surface 21 and tooth profile starting surface 22B
An extra protrusion 1B having a thickness X equal to is formed.
従つて、受圧基準面２１と歯型部開始面２２Ｂ
との間隔Ｘを調整することによりこの余肉のはみ
出し厚さ及びその突出量を任意の形状にすること
ができる。即ち、受圧基準面２１と歯型部開始面
２２Ｂとの間隔Ｘを例えば0.5〜２mm等適当に設
定することにより、余肉のはみ出しを当該同期用
スプライン歯１の作用に支障がなく、且つ、変速
機内に組込まれた後の作動時に脱落することのな
いような形状とすることができるものである。 Therefore, the pressure receiving reference surface 21 and the tooth profile starting surface 22B
By adjusting the distance X between the two parts, the protruding thickness and the amount of protrusion of this extra thickness can be made into an arbitrary shape. That is, by appropriately setting the distance X between the pressure-receiving reference surface 21 and the tooth profile starting surface 22B, for example, 0.5 to 2 mm, the protrusion of excess material can be prevented from interfering with the action of the synchronizing spline tooth 1, and The shape can be such that it will not fall off during operation after being incorporated into the transmission.
尚、上記実施例では歯型部開始面２２Ｂの径を
スプライン歯型２２Ａの歯先相当部分と一致させ
てあり、その為に余肉は歯先方向にははみ出さす
ことなく横方向のみにはみ出すように構成した
が、これに限定されるものではなく、歯型部開始
面２２Ｂの径をスプライン歯型２２Ａの歯先相当
部分より大径としても良いものである。 In the above embodiment, the diameter of the tooth profile starting surface 22B is made to match the portion corresponding to the tooth tip of the spline tooth profile 22A, so that the excess material does not protrude in the direction of the tooth tip, but only in the lateral direction. However, the present invention is not limited to this, and the diameter of the tooth profile starting surface 22B may be made larger than the portion corresponding to the tooth tip of the spline tooth profile 22A.
［考案の効果］
上記の如き、本考案に係る同期歯成形鍛造金型
によれば、仕上成形時に余肉が受圧基準面と歯車
部の基準側端面との間に介入して脱落し易い薄い
バリ状となることを防止でき、これに起因する仕
上寸法精度の悪化や変速機に組込み後の余肉の脱
落による変速歯車の破損等を防止することができ
る。即ち、精度の高い成形が可能となると共に、
余肉を脱落不能な状態に成形することもできるも
のである。[Effects of the invention] As described above, according to the forging die for synchronous tooth forming according to the present invention, during finishing forming, excess metal intervenes between the pressure-receiving reference surface and the reference side end surface of the gear part, and is thin and easily falls off. It is possible to prevent burrs from forming, thereby preventing deterioration in finished dimensional accuracy and damage to the transmission gear due to excess material falling off after being assembled into a transmission. In other words, highly accurate molding is possible, and
It is also possible to mold the excess material so that it cannot fall off.
第１図は本考案の一実施例を適用したダイスの
破断斜視図、第２図Ａはその歯型部分の断面図、
Ｂは接合状態の断面図、第３図はダイスに歯車素
材を装着した状態を示す縦断面図、第４図は成形
時の縦断面図、第５図は本考案の実施例により成
形された同期用スプライン歯を示す図であつてＡ
は平面図、Ｂは側面図、Ｃは正面図、第６図は同
期用スプライン歯を有する変速歯車の斜視図、第
７図は同期用スプライン歯の従来例を示す図であ
りＡは平面図、Ｂは側面図、Ｃは正面図である。
１……同期用スプライン歯、２Ａ……基準側端
面（同期用スプライン歯形成側の側端面）、１０
……歯車素材（変速機用歯車素材）、２０……ダ
イス、２１……受圧基準面、２２……歯型部（同
期用スプライン歯の成形型部）。
FIG. 1 is a cutaway perspective view of a die to which an embodiment of the present invention is applied, and FIG. 2A is a cross-sectional view of its tooth profile.
B is a sectional view of the joined state, FIG. 3 is a longitudinal sectional view showing the state in which the gear material is attached to the die, FIG. 4 is a longitudinal sectional view during molding, and FIG. A diagram showing spline teeth for synchronization;
is a plan view, B is a side view, C is a front view, FIG. 6 is a perspective view of a transmission gear having synchronizing spline teeth, FIG. 7 is a diagram showing a conventional example of synchronizing spline teeth, and A is a plan view. , B is a side view, and C is a front view. 1...Synchronization spline tooth, 2A...Reference side end surface (side end surface on synchronization spline tooth formation side), 10
...Gear material (gear material for transmission), 20...Dice, 21...Pressure receiving reference surface, 22...Tooth mold part (molding mold part for synchronization spline teeth).
Claims (1)
た変速機用歯車素材の前記同期用スプライン歯を
型鍛造により所定寸法に仕上成形するものであつ
て、ダイスの前記同期用スプライン歯の成形型部
が、前記歯車素材の前記同期用スプライン歯形成
側の側端面と当接する受圧基準面から所定間隔離
れて形成されていること、を特徴とする同期歯成
形鍛造金型。 The synchronizing spline teeth of a gear material for a transmission in which the general shape of the synchronizing spline teeth has been formed in advance are finish-formed to a predetermined size by die forging, and the mold portion of the synchronizing spline teeth of the die is A forging die for forming synchronous teeth, characterized in that the die is formed at a predetermined distance from a pressure receiving reference surface that comes into contact with the side end surface of the gear material on the side where the synchronous spline teeth are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14141588U JPH0534833Y2 (en) | 1988-10-28 | 1988-10-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14141588U JPH0534833Y2 (en) | 1988-10-28 | 1988-10-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0265445U JPH0265445U (en) | 1990-05-17 |
| JPH0534833Y2 true JPH0534833Y2 (en) | 1993-09-03 |
Family
ID=31406451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14141588U Expired - Lifetime JPH0534833Y2 (en) | 1988-10-28 | 1988-10-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0534833Y2 (en) |
-
1988
- 1988-10-28 JP JP14141588U patent/JPH0534833Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0265445U (en) | 1990-05-17 |
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