JPH0734963B2 - Gear material manufacturing method - Google Patents
Gear material manufacturing methodInfo
- Publication number
- JPH0734963B2 JPH0734963B2 JP2016359A JP1635990A JPH0734963B2 JP H0734963 B2 JPH0734963 B2 JP H0734963B2 JP 2016359 A JP2016359 A JP 2016359A JP 1635990 A JP1635990 A JP 1635990A JP H0734963 B2 JPH0734963 B2 JP H0734963B2
- Authority
- JP
- Japan
- Prior art keywords
- gear material
- preform
- shaped preform
- tubular portion
- punch
- 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
Landscapes
- Forging (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、主として自動車用自動変速機に組込まれるク
ラッチギヤ用等の円盤形状で且つ側面に歯付き筒状部を
有する歯車素材の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention mainly relates to a method for manufacturing a gear material having a disk shape and a side surface having a toothed tubular portion for a clutch gear or the like incorporated in an automatic transmission for automobiles. Regarding
（従来の技術） 従来、円盤状プリフォームを特開昭64−78644号公報で
知られるような押出し金型内に該円盤状プリフォームの
外周面との間に空隙を生じないようにしてセットし、パ
ンチを押し込んで円盤状プリフォームの側面に筒状部を
押出し成形するものは知られている。(Prior Art) Conventionally, a disc-shaped preform is set in an extrusion die as known from Japanese Patent Laid-Open No. 64-78644 so that no gap is formed between the disc-shaped preform and the outer peripheral surface of the disc-shaped preform. It is known that a punch is pushed in to extrude and form a tubular portion on the side surface of a disc-shaped preform.
そして、上記筒状部を成形する押出し金型の成形孔の内
周面に歯形を形成し、該金型内に、歯車素材の最終外径
と同径な円盤状プリフォームをその外周面との間に空隙
を生じないようにセットして、パンチを押込み、側面に
歯付き筒状部を有する円盤状の歯車素材を成形すること
が考えられる。Then, a tooth shape is formed on the inner peripheral surface of the molding hole of the extrusion die for molding the tubular portion, and a disk-shaped preform having the same outer diameter as the final outer diameter of the gear material is formed on the outer peripheral surface thereof in the die. It is conceivable to set so as not to create a gap between the two, press the punch, and form a disc-shaped gear material having a toothed tubular portion on its side surface.
（発明が解決しようとする課題） 一般に、円盤状プリフォームは円柱状素材を据込み成形
により拡径して作るもので、クラッチギヤ用等の比較的
偏平な歯車素材を成形する場合に、上記の如く、歯車素
材の最終外径と同径に拡径した円盤状プリフォームを押
出し金型内に該プリフォームの外周面との間に空隙を生
じないようにセットして歯付き筒状部を成形するので
は、その前段の据込み成形工程において円柱状素材の最
終外径寸法に拡径せざるを得なくなり、据込み率が高く
なって大きな据込み成形荷重が必要になる。(Problems to be Solved by the Invention) Generally, a disk-shaped preform is made by expanding the diameter of a columnar material by upsetting, and when forming a relatively flat gear material for clutch gears, etc. As described above, the disk-shaped preform expanded to the same outer diameter as the final outer diameter of the gear material is set in the extrusion die so that no gap is formed between the preform and the outer peripheral surface of the preform, and the toothed tubular portion is formed. In the case of molding, it is unavoidable to expand to the final outer diameter dimension of the cylindrical material in the upsetting process of the preceding stage, the upsetting ratio becomes high, and a large upsetting load is required.
しかも、据込み率が高いため素材の外周割れ所謂クラッ
クや偏肉を生じ易くなる。Moreover, since the upsetting rate is high, the outer peripheral cracks of the material, so-called cracks and uneven thickness, are likely to occur.
本発明は、かかる問題点に鑑みてなされたものであり、
その目的とするところは円盤状プリフォームを作るため
の据込み成形荷重を低減し更にクラックや偏肉の発生を
阻止した歯車素材の製造方法を提供することにある。The present invention has been made in view of such problems,
It is an object of the invention to provide a method for manufacturing a gear material in which the upsetting load for making a disk-shaped preform is reduced and cracks and uneven thickness are prevented.
（課題を解決するための手段） 上記目的を達成すべく、本発明では、一側面に環状窪み
を有する円盤状で且つ他側面に歯付き筒状部を有する歯
車素材の製造方法であって、歯車素材の最終形状より小
径で且つ環状窪みの下地となる窪みを有しない円盤状プ
リフォームを、押出し金型内に該円盤状プリフォームの
全周に亘る空隙を存してセットして、環状窪みの成形用
突部を有するパンチの押込みにより環状窪みの成形と前
記歯付き筒状部の押出し成形と歯車素材の最終外径寸法
までの据込み成形とを同一の押出し金型で行なうように
した。(Means for Solving the Problems) In order to achieve the above object, in the present invention, a method of manufacturing a gear material having a disk shape having an annular recess on one side surface and a toothed tubular portion on the other side surface, A disc-shaped preform having a smaller diameter than the final shape of the gear material and having no depression that serves as the base of the annular depression is set in the extrusion die with a space around the entire circumference of the disc-shaped preform, and the annular shape is formed. By pressing a punch having a projection for forming a depression, the formation of an annular depression, the extrusion molding of the toothed tubular portion, and the upset molding to the final outer diameter of the gear material are performed in the same extrusion die. did.
（作 用） 押出し金型の内周面と円盤状プリフォームの外周面との
間に空隙が存するためパンチを押込むことにより該プリ
フォームが潰されて拡径され金型の空間部分が充される
ことによって内圧が高まり、その後に歯付き筒状部の押
出し成形が始まる。(Operation) Since there is a gap between the inner peripheral surface of the extrusion die and the outer peripheral surface of the disk-shaped preform, pressing the punch crushes the preform and expands its diameter to fill the space of the die. As a result, the internal pressure increases, and then extrusion molding of the toothed tubular portion starts.
結局、円盤状プリフォームが拡径された後に歯付き筒状
部の押出し成形が行なわれることから、押出し成形工程
において据込み成形を行なうようにしても押出し成形荷
重が増大することはない。After all, since the toothed tubular portion is extrusion-molded after the diameter of the disk-shaped preform is expanded, the extrusion molding load does not increase even if the upsetting is performed in the extrusion molding step.
ところで、歯車素材に環状窪みを成形する場合、プリフ
ォームに予め環状窪みの下地となる窪みを形成しておく
ことも考えられるが、これではパンチの突部によるプリ
フォームへの軸方向加圧力が低下し、歯付き筒状部の押
出し成形に突部による加圧力を効率良く寄与できなくな
る。By the way, in the case of forming an annular recess in the gear material, it is possible to form a recess on the preform as a base of the annular recess in advance, but this causes the axial pressure applied to the preform by the protrusion of the punch to the preform. As a result, the pressure applied by the protrusion cannot be efficiently contributed to the extrusion molding of the toothed tubular portion.
これに対し、本発明では、プリフォームに下地用の窪み
を形成していないため、パンチの突部によりプリフォー
ムが軸方向に強く加圧され、歯付き筒状部を効率良く押
出し成形することができる。On the other hand, in the present invention, since the preform is not formed with the depression for the base, the preform is strongly pressed in the axial direction by the protrusion of the punch, and the toothed tubular portion can be efficiently extruded and molded. You can
尚、プリフォームの周囲に空隙が確保されていない場
合、プリフォームに下地用の窪みを形成しておかない
と、パンチの突部の押込みに伴い肉が上方に盛り上り縦
ばりが多く発生するが、本発明ではプリフォームの周囲
に全周に亘る空隙が確保されているため、下地用の窪み
を形成していないプリフォームを用いても、パンチの突
部が押込まれたときに肉が上方に盛り上らずに径方向に
流れ、縦ばりの発生が抑制される。In addition, when a void is not secured around the preform, unless the depression for the base is formed in the preform, the meat rises up and a lot of vertical burrs occur as the protrusion of the punch is pushed. However, in the present invention, since a void is secured around the entire circumference of the preform, even if a preform that does not have a depression for the base is used, the meat will be Flows in the radial direction without rising upward, and suppresses the occurrence of vertical flash.
また、歯車素材の最終形状より小径な円盤状プリフォー
ムを作る工程と、上記の如く押出し金型内で該円盤状プ
リフォームを歯車素材の最終外径寸法に拡径する工程の
２段階に据込み成形を行なうことができるため、各工程
の据込み率を比較的小さく設定できるようになり、クラ
ックや偏肉の発生を阻止でき、しかも円柱状素材から歯
車素材の最終形状より小径な円盤状プリフォームを作る
ため、プリフォームへの下地用窪みの形成を省略するこ
とと相俟ってプリフォームの据込み成形荷重を大幅に低
減でき、歯車素材をトランスファー成形する場合にプレ
ス装置のプレス能力の低減を図れる。In addition, it is installed in two stages: a step of making a disc-shaped preform having a diameter smaller than the final shape of the gear material, and a step of expanding the disc-shaped preform in the extrusion die as described above to the final outer diameter dimension of the gear material. Since upsetting can be performed, the upsetting rate of each process can be set to a relatively small value, cracks and uneven thickness can be prevented from occurring, and moreover the disk-like shape with a smaller diameter than the final shape of the gear material from the cylindrical material Since the preform is made, the upsetting load of the preform can be significantly reduced in combination with the omission of the formation of the depression for the base on the preform, and the press capability of the press machine when the gear material is transfer molded. Can be reduced.
（実施例） 以下本発明の実施例を図面によって説明する。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
実施例では、トランスファー成形により第３図Ａで示す
円柱状素材ａから第４図で示す孔明き円盤状で且つ側面
に歯付き筒状部を有する歯車素材ｅを４工程で作るよう
にしたもので、第１図は第３図Ｄで示すリング状プリフ
ォームｄから歯車素材ｅを成形するためのプレス装置を
示す。In the embodiment, the gear material e shown in FIG. 3A to the gear material e having the perforated disc shape and the toothed tubular portion on the side surface is produced in four steps by transfer molding. Then, FIG. 1 shows a pressing apparatus for molding the gear material e from the ring-shaped preform d shown in FIG. 3D.
図面で（１）はパンチ、（２）は押出し金型たる下側の
ダイを示し、該パンチ（１）はラム（３）の下面に止め
輪（４）を介して固定されており、また該ダイ（２）に
は歯車素材ｅの最終外径寸法と同径の凹部（５）と内周
面に歯形（６）を形成した該凹部（５）の底面の成形孔
（７）とが設けられており、該ダイ（２）の下側にバッ
クアッププレート（８）とその下側の心型ホルダ（９）
とを設け、該心型ホルダ（９）に歯車素材ｅの軸孔e1を
規定する円心型（10）と該歯車素材ａの歯付き筒状部e2
の内径を規定する該円心型（10）の外周の外心型（11）
とを立設して、該両心型（10）（11）を前記凹部（５）
内に該バックアッププレート（８）の透孔（8a）を通し
て臨ませるようにした。In the drawing, (1) shows a punch, (2) shows a lower die as an extrusion die, the punch (1) is fixed to the lower surface of the ram (3) through a retaining ring (4), and The die (2) is provided with a recess (5) having the same outer diameter as the final outer diameter of the gear material e and a molding hole (7) at the bottom of the recess (5) having a tooth profile (6) formed on the inner peripheral surface. A backup plate (8) is provided below the die (2) and a core-shaped holder (9) below the backup plate (8).
And a circular center type (10) for defining the shaft hole e 1 of the gear material e in the core type holder (9) and a toothed cylindrical portion e 2 of the gear material a.
Outer core type (11) on the outer periphery of the circular center type (10) that defines the inner diameter of
And (2) are installed upright to form the double-core type (10) (11) in the recess (5).
The backup plate (8) was exposed through the through hole (8a).
また、前記外心型（11）の外周に筒状のノックアウト
（12）を摺動自在に設けると共に、該ノックアウト（1
2）の下側にプッシュロッド（13）を設け、該プッシュ
ロッド（13）により該ノックアウト（12）をばね（14）
に抗して上動し得るようにした。図面で（15）（15）は
パンチ（１）とダイ（２）とに夫々潤滑液を噴射する潤
滑液ノズル、（16）は潤滑液を外部に排出する排出通路
を示す。Further, a cylindrical knockout (12) is slidably provided on the outer periphery of the outer core type (11), and the knockout (1
2) A push rod (13) is provided on the lower side, and the knock out (12) is spring (14) by the push rod (13).
To be able to move up against. In the drawing, reference numerals (15) and (15) denote a lubricating liquid nozzle for injecting the lubricating liquid to the punch (1) and the die (2) respectively, and (16) denotes a discharge passage for discharging the lubricating liquid to the outside.
次に本発明による歯車素材の製造方法を実施例に基づい
て説明する。Next, a method for manufacturing a gear material according to the present invention will be described based on examples.
先ず、円柱状素材ａを据込み成形して歯車素材ｅの最終
形状より小径の円盤状プリフォームｂを作った後、この
プリフォームｂの中央部を窪ませたプリフォームｃを作
り、次いで該プリフォームｃの中央部を打抜いてリング
状プリフォームｄを作る。First, a columnar material a is upset to form a disc-shaped preform b having a diameter smaller than the final shape of the gear material e, and then a preform c in which the central portion of the preform b is depressed is formed. The center part of the preform c is punched out to make a ring-shaped preform d.
次いで、リング状プリフォームｄをダイ（２）の凹部
（５）内に該プリフォームｄの外周面との間に空隙が存
するようにセットし（第１図示の状態）、パンチ（１）
を押込むことで、リング状プリフォームｄが潰されて拡
径され凹部（５）の空間部分が充されることによって内
圧が高まり、その後に肉が成形孔（７）に押し出されて
歯付き筒状部e2が成形され（第２図示の状態）、第４図
に示すような歯車素材ｅが作られる。Then, the ring-shaped preform d is set in the concave portion (5) of the die (2) so that a gap exists between the ring-shaped preform d and the outer peripheral surface of the preform d (state shown in FIG. 1), and the punch (1) is set.
By pressing, the ring-shaped preform d is crushed and expanded in diameter to fill the space of the recess (5) to increase the internal pressure, and then the meat is extruded into the forming hole (7) to form a toothed shape. The tubular portion e 2 is molded (state shown in FIG. 2), and the gear material e as shown in FIG. 4 is made.
この場合、リング状プリフォームｄは、その内周面に嵌
挿される内心型（10）によりその位置決めが正確に行な
われる。In this case, the ring-shaped preform d is accurately positioned by the inner core mold (10) fitted into the inner peripheral surface thereof.
実施例では孔明き円盤状の歯車素材ｅを作るようにした
が、これに限るもでなく歯車素材ｅの最終形状の内径と
同径な凹部を有するプリフォームであれば凹部（５）に
対しその位置決めが可能である。In the embodiment, the gear material e having a perforated disk shape is made, but the preform having a recess having the same inner diameter as the final shape of the gear material e is not limited to this. Its positioning is possible.
尚、上記歯付き筒状部e2の押出し成形工程において歯車
素材ｅの側面に環状窪みe3を成形するようにした場合、
リング状プリフォームを凹部（５）内に該プリフォーム
の外周面との間に空隙を生じないようにセットしてパン
チ（１）を押し込むと、先ずパンチ（１）の下面の突部
（1a）が素材に押し込まれて肉が上方に盛り上り、その
後パンチ（１）の下面全体が素材に密着して内圧が高ま
り、歯付き筒状部が押出し成形されるため縦ばりが比較
的多く発生し勝ちとなる。In the extrusion molding step of the toothed tubular portion e 2 , when an annular recess e 3 is formed on the side surface of the gear material e,
When the ring-shaped preform is set in the recess (5) so that no gap is formed between the ring-shaped preform and the outer peripheral surface of the preform and the punch (1) is pushed in, first, the protrusion (1a) on the lower surface of the punch (1) is first set. ) Is pushed into the material and the meat rises upward, then the entire lower surface of the punch (1) adheres to the material and the internal pressure rises, and the toothed tubular part is extruded and formed, so that a relatively large amount of vertical flash occurs. You will win.
しかし、本発明のように、リング状プリフォームｄを凹
部（５）内に該プリフォームｄの外周面との間に空隙を
存してセットすることで、パンチ（１）の押込みにより
先ず突部（1a）が素材に押し込まれて肉が径方向に流れ
るため、上方への肉の盛り上りがほとんど生じず縦ばり
の発生が少なくなり有利である。However, as in the present invention, by setting the ring-shaped preform d in the concave portion (5) with a gap between the ring-shaped preform d and the outer peripheral surface of the preform d, the punch (1) is first pushed in to project. The part (1a) is pushed into the material and the meat flows in the radial direction, so that there is almost no swelling of the meat upward, and the occurrence of vertical flash is reduced, which is advantageous.
（発明の効果） このように本発明によれば、環状窪みと歯付き筒状部と
を有する歯車素材を縦ばりを生ずることなく低荷重で精
度良く成形でき、更に、据込み成形を２段階に行なうこ
とができるため各工程の据込み率を比較的小さく設定で
きるようになり、クラックや偏肉の発生を阻止できると
共に、歯車素材の最終形状より小径な円盤状プリフォー
ムを作るため、プリフォームの据込み成形荷重を大幅に
低減でき、歯車素材をトランスファー成形する場合にプ
レス装置のプレス能力の低減を図れる効果を有する。(Effects of the Invention) As described above, according to the present invention, a gear material having an annular recess and a toothed tubular portion can be accurately formed under a low load without causing vertical flash, and further, upsetting can be performed in two steps. Since the upsetting rate of each process can be set to a relatively small value, the occurrence of cracks and uneven thickness can be prevented, and a disc-shaped preform with a diameter smaller than the final shape of the gear material can be produced. The upsetting load of the reform can be greatly reduced, and the press capability of the press machine can be reduced when the gear material is transfer molded.
第１図は本発明方法により押出し成形するためのプレス
装置の截断正面図、第２図はその作動状態を示す截断正
面図、第３図Ａ、Ｂ、Ｃ、Ｄは夫々各プリフォームを示
す図、第４図は歯車素材の截断正面図である。 ｄ……円盤状プリフォーム、ｅ……歯車素材、e2……歯
付き筒状部、（１）……パンチ、（２）……ダイ（押出
し金型）FIG. 1 is a cut-away front view of a press device for extrusion molding by the method of the present invention, FIG. 2 is a cut-away front view showing its operating state, and FIGS. 3A, B, C and D show respective preforms. FIG. 4 is a cutaway front view of the gear material. d ...... discoid preform, e ... gear material, e 2 ... toothed cylindrical portion, (1) ...... punch (2) ...... die (extrusion die)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 村田 真一 愛知県豊橋市南大清水町字富士見357番地 の１ (56)参考文献 特開 昭58−122144（ＪＰ，Ａ) 特開 昭60−49826（ＪＰ，Ａ) 実開 昭63−101137（ＪＰ，Ｕ) 実開 昭58−175846（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shinichi Murata 1 357 Fujimi, Minami-Oshimizu-cho, Toyohashi City, Aichi Prefecture (56) References JP-A-58-122144 (JP, A) JP-A-60-49826 ( JP, A) Actual opening Sho 63-101137 (JP, U) Actual opening Sho 58-175846 (JP, U)
Claims (1)
側面に歯付き筒状部を有する歯車素材の製造方法であっ
て、歯車素材の最終形状より小径で且つ環状窪みの下地
となる窪みを有しない円盤状プリフォームを、押出し金
型内に該円盤状プリフォームの全周に亘る空隙を存して
セットして、環状窪みの成形用突部を有するパンチの押
込みにより環状窪みの成形と歯付き筒状部の押出し成形
と歯車素材の最終外径寸法までの据込み成形とを同一の
押出し金型で行なうようにしたことを特徴とする歯車素
材の製造方法。1. A method for manufacturing a gear material having a disk shape having an annular depression on one side surface and a toothed tubular portion on the other side surface, the diameter being smaller than the final shape of the gear material, and the base of the annular depression. A disc-shaped preform having no depression is set in the extrusion die with a space around the entire circumference of the disc-shaped preform, and the annular depression is formed by pushing a punch having a molding protrusion of the annular depression. A method for manufacturing a gear material, characterized in that the molding, the extrusion molding of the toothed tubular portion and the upsetting of the gear material to the final outer diameter dimension are performed by the same extrusion die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016359A JPH0734963B2 (en) | 1990-01-26 | 1990-01-26 | Gear material manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016359A JPH0734963B2 (en) | 1990-01-26 | 1990-01-26 | Gear material manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03221233A JPH03221233A (en) | 1991-09-30 |
| JPH0734963B2 true JPH0734963B2 (en) | 1995-04-19 |
Family
ID=11914148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2016359A Expired - Fee Related JPH0734963B2 (en) | 1990-01-26 | 1990-01-26 | Gear material manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0734963B2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58122144A (en) * | 1982-01-14 | 1983-07-20 | Honda Motor Co Ltd | Manufacture of gear blank material having dog hole, and its device |
| JPS58175846U (en) * | 1983-03-24 | 1983-11-24 | 三菱製鋼株式会社 | Manufacturing equipment for products with tooth profiles |
| JPS6049826A (en) * | 1983-08-29 | 1985-03-19 | Nissan Motor Co Ltd | Forming method of gear for transmission of automobile |
| JPS63101137U (en) * | 1986-12-18 | 1988-07-01 |
-
1990
- 1990-01-26 JP JP2016359A patent/JPH0734963B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03221233A (en) | 1991-09-30 |
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