JPH04200836A - Method and device for forming gear having guide part - Google Patents
Method and device for forming gear having guide partInfo
- Publication number
- JPH04200836A JPH04200836A JP33403690A JP33403690A JPH04200836A JP H04200836 A JPH04200836 A JP H04200836A JP 33403690 A JP33403690 A JP 33403690A JP 33403690 A JP33403690 A JP 33403690A JP H04200836 A JPH04200836 A JP H04200836A
- Authority
- JP
- Japan
- Prior art keywords
- tooth profile
- punch
- tooth form
- forming
- stock
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 12
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 23
- 238000000465 moulding Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 8
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 239000002699 waste 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)
- Gears, Cams (AREA)
- Forging (AREA)
Abstract
Description
【発明の詳細な説明】
イ 産業上の利用分野
本発明は、ボス部の周囲に二段の歯形を備え、その歯形
のうち径が小さい歯形のストレート部に逆テーパが付与
された案内部を有するギヤを、素材から一体形成する案
内部を有するギヤの成形方法及びその装置に関する。DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention provides a guide portion having a two-step tooth profile around a boss portion, and a straight portion of the tooth profile having a smaller diameter being reversely tapered. The present invention relates to a method for molding a gear having a guide portion, which is integrally formed from a raw material, and an apparatus therefor.
口 従来技術
上記案内部を有するギヤは、塑性加工技術にて歯車形状
を形成した後、歯部を機械加工にて切削していたが、効
率が悪いことから、従来、特開昭５２−６１１６２号や
特開昭６３−１１９９４５号各公報に記載の如く、塑性
変形を利用し、しごきを加えて矯正する技術が開発され
た。Prior Art Gears with the above-mentioned guide portion were formed by forming the gear shape using plastic working technology, and then cutting the tooth portions by machining. As described in Japanese Patent Application Laid-Open No. 63-119945, a technique has been developed that utilizes plastic deformation and applies ironing to correct the problem.
ハ 発明が解決しようとする課題
上記従来の技術おいても、二工程を必要とずるから、作
業効率が悪い・二とには変わりない。C. Problems to be Solved by the Invention Even in the above-mentioned conventional technology, since two steps are required, the work efficiency is still poor.
又従来の塑性変形技術により、成形歯形より大きい歯形
部を有した素材或は荒地から一工程で製品化させるとと
（、＝１、余肉の発生により装置への負担が大きく、型
の破損や加工精度に問題がある。Furthermore, if conventional plastic deformation technology is used to turn a raw material or waste material with a tooth profile larger than the molded tooth profile into a product in one step (, = 1, the generation of excess metal will place a heavy burden on the equipment and cause mold breakage. There are problems with machining accuracy.
二 課題を解決するための手段
本発明は、−工程により、素材から加工精度の高い案内
部を有するギヤを一体形成する技１ｔｉ１てあって、逆
テーパが伺Ｌｊされた歯形部形状を形成する空間を、チ
ャンファー部とス［−レート部との境から軸と直交する
面で二分割された金型内へ、成形歯形に満たない歯形部
を有する素材におけるその歯形部を張り出させて歯形を
形成する成形方法と、逆テーバが付与された歯形部形状
を形成する空間をチャンファー部とストレート部との境
から軸と直交する面で二分割したチへ・ンファ一部に相
当する空間ど、ストレーｊ・部に相当する空間を、軸方
向へ押圧力を加えるバッチど、そのパンチの昇降作動に
連動して放射方向へ開閉作動する可動ダイにより、パン
チの下降による可動ダイの閉塞時に形成可能とした装置
にある。2. Means for Solving the Problems The present invention provides a technique for integrally forming a gear having a guide portion with high machining precision from a raw material through a process, in which a tooth shape with a reverse taper Lj is formed. The space is divided into two parts from the boundary between the chamfer part and the slate part into the mold by a plane perpendicular to the axis, and the tooth profile of a material having a tooth profile smaller than the molding tooth profile is made to overhang. The molding method for forming the tooth profile and the space that forms the tooth profile shape with the inverted taper are divided into two from the boundary between the chamfer part and the straight part by a plane perpendicular to the axis, which corresponds to a part of the chihe-enfa. A movable die that opens and closes in the radial direction in conjunction with the lifting and lowering of the punch, such as a batch, which applies a pressing force in the axial direction to the space corresponding to the stray part, blocks the movable die by lowering the punch. It is in the device that made it possible to form at the time.
）Ｊ＜ 作用
パンチを下降させると、素＋１にＧＪ−軸力向へ押圧力
が加わり、同時に素材の周囲には、山形部形状形成空間
が形成される。そわによって素材は軸方向へ変形すると
共に、その押圧力によって放射方向へ張り出し、成形歯
形に満たない歯形部が歯形部形状形成空間内へ進入して
、スト１ノート部に逆テーパか（−１与さＡ１だ案内部
を有するギヤの歯形が成形される。そして歯部形状空間
のストレー１一部分は、可動ダイが放射方向又は軸方向
へ退避するので成形品の取り出［）は容易である。)J< Action When the punch is lowered, a pressing force is applied to the element +1 in the direction of the GJ-axial force, and at the same time, a chevron shape forming space is formed around the material. The material deforms in the axial direction due to the wrinkling, and the material expands in the radial direction due to the pressing force, and the tooth profile portion that is less than the forming tooth profile enters the tooth profile forming space, causing a reverse taper (-1 A tooth profile of a gear having a guide portion given by A1 is molded.Then, since the movable die retracts in the radial or axial direction in the stray 1 portion of the tooth shape space, it is easy to take out the molded product. .
へ 実施例
本発明に係る歯車の成形方法及び装置を、リハ・−スア
イドルギャにおいて実施した一例について図面に基いて
説明する。EXAMPLE An example of the gear molding method and apparatus according to the present invention implemented in a rehabilitation gear will be described with reference to the drawings.
第１図において、Ｉ Ｉｔ固定グイ、２は可動ダイ、３
はパンチであって、固定ダイ１けベースに固定され、中
央には形成されるリバースアイドルギヤのボス部に対応
する凹部１ａを有し、周囲には、歯形のヂャンファ一部
とストし・−ト部どの境から軸と直交する面で二分割し
たヂ飄・ンファ一部に相当する山形部形状形成空間ｌＯ
ａが設ｊ・づられている。In Fig. 1, I It fixed guide, 2 is a movable die, 3 is a movable die,
is a punch which is fixed to a single fixed die base, has a recessed part 1a in the center corresponding to the boss part of the reverse idle gear to be formed, and has a part of tooth-shaped bumper and a punch in the periphery. The chevron shape forming space lO corresponds to a part of the zigzag part divided into two by a plane orthogonal to the axis from which boundary.
a is set j.
可動ダイ２は軸と直交する線により放射状に分割されて
おり、固定ダイ１の上面に沿って摺動し、中心に対して
開閉Ｔ＋Ｊ能になっている。そして分割された各可動ダ
イ２．２・・の先端は、閉塞時に隣接する可動ダイ２．
２・・間に、歯車歯形の抜の止め用達テーバが付与され
たストレート
ｂを形成可能な形状になっている。パンチ３ば、油圧プ
レス等によって軸（上下）方向に進退運動し、ダイ１の
凹部１ａヘセツＩ・された素材４に対して押圧力を付与
するもので、インナーパンチ３ａとアウターパンチ３ｂ
とで構成され、インナーバンチ３ａは抑圧手段（油圧プ
レス等）からダイレクトに押圧力を受り、アウターバン
チ３ｂはウレタン材５を介して抑圧手段から押圧力を受
ける。又インナーバンチ３ａの抑圧面には、形成される
リバースアイドルギヤの端面形状に応じた四部６が形成
され、アウターバンチ３ｂどともに大きい径の歯形部外
周に相当する空間を確保する。更に押圧手段には、ウレ
タン材７を介して押圧力を受ける作動ビン８が設けられ
ている。一方ダイ側には、前記作動ビン８の下降時に押
圧されて可動ダイ２を閉塞方向へ移動させるカム９が設
りられており、パンチ３が下降すると、作動ビン８がカ
ム９を押圧し、それによって分割ダイ２ａが中心へ向か
って摺動じ、素材４の周囲には、固定ダイ１の山形部形
状形成空間１０ａと可動ダイ２の山形部形状形成空間１
０１〕とて、歯形形状の閉塞された山形部形状形成空間
１０が形成される。続いてアウターバンチ３ａの下端が
可動ダイ２に当接し、最後にインナーパンチ３ａによる
押圧力が作用する。The movable die 2 is divided radially by a line perpendicular to the axis, slides along the upper surface of the fixed die 1, and has T+J ability to open and close with respect to the center. Then, the tip of each divided movable die 2.2... is connected to the adjacent movable die 2.2 when closed.
2. The shape is such that it is possible to form a straight b with a taper provided therebetween to prevent the gear tooth profile from being pulled out. The punch 3b moves forward and backward in the axial (vertical) direction by a hydraulic press or the like, and applies a pressing force to the material 4 that has been pressed into the recessed portion 1a of the die 1, and includes an inner punch 3a and an outer punch 3b.
The inner bunch 3a receives a pressing force directly from a suppressing means (such as a hydraulic press), and the outer bunch 3b receives a pressing force from the suppressing means via the urethane material 5. Furthermore, four portions 6 are formed on the suppressing surface of the inner bunch 3a in accordance with the shape of the end face of the reverse idle gear to be formed, and a space corresponding to the outer periphery of the large-diameter tooth profile is secured in both the outer bunches 3b. Further, the pressing means is provided with an actuating pin 8 that receives pressing force through a urethane material 7. On the other hand, a cam 9 is provided on the die side, which is pressed when the operating bin 8 is lowered to move the movable die 2 in the closing direction.When the punch 3 is lowered, the operating bin 8 presses the cam 9. As a result, the split die 2a slides toward the center, and around the material 4, the chevron shape forming space 10a of the fixed die 1 and the chevron shape forming space 1 of the movable die 2 are formed.
01], a tooth-shaped closed chevron-shaped forming space 10 is formed. Subsequently, the lower end of the outer bunch 3a comes into contact with the movable die 2, and finally the pressing force from the inner punch 3a is applied.
このように形成された装置によりリバースアイドルギヤ
な形成する方法を説明すると、リバースアイドルギヤを
形成するには、先ずパンチ３の上昇時に、ダイ内へ成形
歯形に満たない歯形部を有する素材４をセットすること
から始まる。この時点で可動ダイ２は放射方向へ開放さ
れており、抑圧手段の抑圧動作によりパンチ３が下降す
る。先ず最初に可動ダイ２が中心方向に向かって摺動し
、素材４の周囲に歯形部形状形成空間１０が形成され、
続いてアウターバンチ３ｂが下降して可動ダイ２に当接
し、素材４はその下部及び周囲が拘束される。最後にイ
ンナーパンチ３ａが下降して素材４を押し潰すと、素材
４は放射方向へ膨出し、成形歯形に満たない歯形部が拡
大して歯形部形状形成空間内へ張り出す。このようにし
て−工程で、歯形のストレート部に抜は止め用の逆テー
パが付与された案内部を有するリバースアイドルギヤ４
′が完成される。To explain the method of forming a reverse idle gear using the device formed in this way, in order to form a reverse idle gear, first, when the punch 3 is raised, a material 4 having a tooth profile smaller than the forming tooth profile is introduced into the die. It starts with setting it up. At this point, the movable die 2 is opened in the radial direction, and the punch 3 is lowered by the suppressing operation of the suppressing means. First, the movable die 2 slides toward the center, and a tooth profile forming space 10 is formed around the material 4.
Subsequently, the outer bunch 3b descends and comes into contact with the movable die 2, and the material 4 is restrained at its lower part and surrounding area. Finally, when the inner punch 3a descends and crushes the material 4, the material 4 expands in the radial direction, and the tooth profile that is less than the forming tooth profile expands and protrudes into the tooth profile forming space. In this way, in the process, a reverse idle gear 4 having a guide portion in which the straight portion of the tooth profile is provided with a reverse taper to prevent removal.
' is completed.
パンチ３が上昇ずれば、可動ダイ２も開き成形品５は簡
単に取り出せる。When the punch 3 moves upward, the movable die 2 also opens and the molded product 5 can be easily taken out.
本実施例装置は、ウレタン材の介在により１、先ず素材
の周囲に歯形部形状形成空間１０を形成し、次にインナ
ーパンチ３ａを下降させる構造であるから、効率が良く
、加工圧による金型への負担が少ない。又上記実施例は
、案内部をパンチ側にして素材をセットする装置につい
て説明したが、逆にセットして形成することも可能であ
って、次にその変更実施例を第６図〜第９図に基いて説
明する。This embodiment of the apparatus has a structure in which 1. the tooth profile forming space 10 is first formed around the material by means of the urethane material, and then the inner punch 3a is lowered; There is less burden on In the above embodiment, the material is set with the guide section on the punch side, but it is also possible to set the material in the opposite direction. This will be explained based on the diagram.
この装置ば、パンチ１１、下型１２、上型１３及び可動
ダイ２とで構成され、ストレート部に逆テーパが付与さ
れた歯形部形状形成空間１０は、第６図示の如く、パン
チ１１に形成されている歯形部形状形成空間１０ａと、
可動ダイ２で形成される歯形部形状形成空間１０ｂとで
形成される。下型１２内に素材４をセットすると（第７
図）、先ず可動パンチ２と上型１３とで、歯形部形状形
成空間１０ｂを含む閉塞された空間が形成され（第８図
）、次に、チャンファー部に相当する歯形部形状形成空
間１０ａが設けられたパンチ１１が下降することによっ
て完全な歯形部形状形成空間１０が形成され、同時に素
材４へは押圧力が加わって、成形歯形に満たない歯形部
を有する素材におけるその歯形部が、前記歯形部形状形
成空間１０内へ張り出し、前記実施例と同様に、歯形の
ストレート部に抜は止め用の逆テーパが付与された案内
部を有するりパースアイドルギヤ４′が完成される（第
９図）。This device is composed of a punch 11, a lower mold 12, an upper mold 13, and a movable die 2, and a tooth profile forming space 10 in which a straight portion is given a reverse taper is formed in the punch 11 as shown in FIG. a tooth profile forming space 10a,
It is formed by the tooth profile forming space 10b formed by the movable die 2. When the material 4 is set in the lower mold 12 (7th
First, a closed space including the tooth profile forming space 10b is formed by the movable punch 2 and the upper die 13 (Figure 8), and then a tooth profile forming space 10a corresponding to the chamfer part is formed. By lowering the punch 11 provided with the tooth profile, a complete tooth profile forming space 10 is formed, and at the same time, a pressing force is applied to the material 4, so that the tooth profile in the material having a tooth profile smaller than the forming tooth profile, A perspective idle gear 4' is completed by having a guide part extending into the tooth profile forming space 10 and having a guide part in which the straight part of the tooth profile is provided with a reverse taper to prevent removal, as in the above embodiment. Figure 9).
尚前記両実施例ともリバースアイドルギヤの形成につい
て説明したが、案内部を有するギヤであれば、リバース
アイドルギヤに限定されるものではない。Although the formation of a reverse idle gear has been described in both of the above embodiments, the present invention is not limited to a reverse idle gear as long as the gear has a guide portion.
ト 効果
本発明によれば、パンチを一挙動させるだけで、ボス部
の周囲に二段の歯形を備え、その歯形のうち径が小さい
歯形のストレート部に抜は止め用の逆テーパが付与され
たリバースアイドルギヤを形成でき、それによって工程
が半減し、作業効率は大幅に向上し、又チャンファー部
と逆テーパ部とが同時成形されるので、歯車精度も向上
するのである。G. Effect According to the present invention, by just one movement of the punch, a two-stage tooth profile is provided around the boss portion, and a reverse taper for preventing extraction is provided to the straight portion of the tooth profile with a smaller diameter. This reduces the number of steps by half, greatly improving work efficiency, and since the chamfer part and reverse taper part are molded at the same time, gear accuracy also improves.
図面は本発明に係る歯車の成形装置を示したもので、第
１図及び第２図は本発明の装置を示す説明図、第３図は
歯形部形状形成空間の説明図、第４図は素材の加工前に
おける説明図、第５図は完成したリバースアイドルギヤ
の説明図、第６図は変更実施例における歯形部形状形成
空間の説明図、第７図〜第９図は変更実施例における成
形装置の成形工程説明図である。The drawings show a gear forming device according to the present invention. FIGS. 1 and 2 are explanatory diagrams showing the device of the present invention, FIG. 3 is an explanatory diagram of the tooth profile forming space, and FIG. An explanatory diagram of the material before processing, FIG. 5 is an explanatory diagram of the completed reverse idle gear, FIG. 6 is an explanatory diagram of the tooth profile forming space in the modified embodiment, and FIGS. 7 to 9 are diagrams in the modified embodiment. It is an explanatory diagram of a molding process of a molding apparatus.
Claims (1)
径が小さい歯形のストレート部に逆テーパが付与された
案内部を有するギヤを素材から一体形成する成形方法で
あって、前記逆テーパが付与された歯形部形状を形成す
る空間を、チャンファー部とストレート部との境から軸
と直交する面で二分割された金型内へ、成形歯形に満た
ない歯形部を有する素材におけるその歯形部を張り出さ
せて歯形を形成する案内部を有するギヤの成形方法。 ２ 逆テーパが付与された歯形部形状を形成する空間を
チャンファー部とストレート部との境から軸と直交する
面で二分割したチャンファー部に相当する空間と、スト
レート部に相当する空間を、軸方向へ押圧力を加えるパ
ンチと、そのパンチの昇降作動に連動して放射方向へ開
閉作動する可動ダイにより、パンチの下降による可動ダ
イの閉塞時に形成可能として成る案内部を有するギヤの
成形装置。[Scope of Claims] 1. A molding method for integrally forming a gear from a material, which has a two-stage tooth profile around a boss part and a guide part in which the straight part of the tooth profile with the smaller diameter is reversely tapered. The space forming the tooth profile with the reverse taper is transferred from the boundary between the chamfer part and the straight part into a mold divided into two by a plane perpendicular to the axis, the space being smaller than the molded tooth profile. A method for forming a gear having a guide portion that forms a tooth profile by extending the tooth profile of a material having the tooth profile. 2 The space forming the tooth shape with the reverse taper is divided into two by a plane perpendicular to the axis from the boundary between the chamfer part and the straight part, and a space corresponding to the chamfer part and a space corresponding to the straight part are divided. Forming of a gear having a guide part that can be formed when the movable die is closed by lowering the punch, using a punch that applies a pressing force in the axial direction and a movable die that opens and closes in the radial direction in conjunction with the lifting and lowering operation of the punch. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2334036A JPH0729172B2 (en) | 1990-11-29 | 1990-11-29 | Method and apparatus for forming gear for transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2334036A JPH0729172B2 (en) | 1990-11-29 | 1990-11-29 | Method and apparatus for forming gear for transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04200836A true JPH04200836A (en) | 1992-07-21 |
| JPH0729172B2 JPH0729172B2 (en) | 1995-04-05 |
Family
ID=18272788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2334036A Expired - Lifetime JPH0729172B2 (en) | 1990-11-29 | 1990-11-29 | Method and apparatus for forming gear for transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0729172B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6536257B2 (en) * | 2000-04-21 | 2003-03-25 | Gohsyu Corporation | Speed-changing gear manufacturing apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5261162A (en) * | 1975-11-17 | 1977-05-20 | Toyota Motor Co Ltd | Device for forming reverse taper of spline groove of gear boss portion |
-
1990
- 1990-11-29 JP JP2334036A patent/JPH0729172B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5261162A (en) * | 1975-11-17 | 1977-05-20 | Toyota Motor Co Ltd | Device for forming reverse taper of spline groove of gear boss portion |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6536257B2 (en) * | 2000-04-21 | 2003-03-25 | Gohsyu Corporation | Speed-changing gear manufacturing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0729172B2 (en) | 1995-04-05 |
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