JPH0471749A - Method for forming sheet metal tooth profile - Google Patents
Method for forming sheet metal tooth profileInfo
- Publication number
- JPH0471749A JPH0471749A JP18380090A JP18380090A JPH0471749A JP H0471749 A JPH0471749 A JP H0471749A JP 18380090 A JP18380090 A JP 18380090A JP 18380090 A JP18380090 A JP 18380090A JP H0471749 A JPH0471749 A JP H0471749A
- Authority
- JP
- Japan
- Prior art keywords
- tooth profile
- workpiece
- sheet metal
- mold
- worked
- 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.)
- Pending
Links
- 239000002184 metal Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 15
- 239000000463 material Substances 0.000 abstract description 7
- 230000002093 peripheral effect Effects 0.000 abstract description 6
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Extrusion Of Metal (AREA)
- Forging (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、板金歯形の成形方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method for forming a sheet metal tooth profile.
（従来の技術及び解決すべき課題）
例えば、自動車の自動変速装置等においては、板金によ
り形成した歯車が多数使用されている。(Prior Art and Problems to be Solved) For example, in automatic transmission devices of automobiles, many gears formed of sheet metal are used.
この歯車は、第８図の（ａ）〜（ｅ）に示すように板材
１から円板のブランク２を切り取り（ａ）、このブラン
ク２を浅い有底円筒形をなす容器状に加工してドロー３
としくｂ）、当該ドロー３をプレス装置４によるカム成
形（Ｃ）、又はプレス装置５による絞り成形（ｄ）によ
り周面３ａ （（ｂ）図）に歯形３ｂを成形（ｅ）シて
形成したものである。かかる板金製の歯車は、鋳造成い
は鍛造により形成した歯単に比して、軽量で、しかも安
価であるために前記自動変速装置を始めとして軽量化が
要求される各種の装置に広く使用されている。This gear is made by cutting out a disk blank 2 from a plate material 1 (a) and processing this blank 2 into a shallow cylindrical container shape as shown in FIGS. 8(a) to (e). Draw 3
Toshikib), the draw 3 is formed by cam forming with a press device 4 (C) or drawing forming with a press device 5 (d) to form a tooth profile 3b on the peripheral surface 3a (Figure (b)) (e). This is what I did. Such sheet metal gears are lighter and cheaper than gears formed by casting or forging, and are therefore widely used in various devices that require weight reduction, including the automatic transmission described above. ing.
ところで、ドロー３に歯形を成形する場合、カム成形方
法では、ドロー３の回りに成形すべき歯数だけ歯形用の
パンチ４ａを配列するために型費が高い、生産性が悪い
、成形し難い、歯形の精度が低い等の問題があり、また
、パンチ５ａにより絞り成形方法では、ドロー３をしご
いて歯形を成形するために生産性が悪い、トラブルが多
い、型の寿命が短い等の問題がある。By the way, when forming a tooth profile on the draw 3, the cam forming method involves arranging tooth profile punches 4a around the draw 3 by the number of teeth to be formed, resulting in high mold costs, poor productivity, and difficulty in forming. , there are problems such as low accuracy of the tooth profile, and in the drawing method using the punch 5a, the draw 3 is squeezed to form the tooth profile, resulting in poor productivity, many troubles, and a short mold life. There's a problem.
本発明は上述の点に鑑みてなされたもので、歯形の精度
が高（、剛性の高い板金製の歯車を形成することが可能
な板金歯形の成形方法を提供することを目的とする。The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a method for forming a sheet metal tooth profile that can form a sheet metal gear with high tooth profile accuracy (and high rigidity).
（課題を解決するための手段）
上記目的を達成するために本発明によれば、有底円筒形
状の被加工部材の周面にプレス加工により歯形を成形す
る板金歯形の成形方法において、前記被加工部材の周面
を成形すべき歯形に準じた形状に予備成形した後成形す
べき歯形が形成された金型に嵌合し、パンチにより前記
被加工部材を内側から加圧して前記歯形を成形するよう
にしたものである。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a sheet metal tooth profile forming method in which a tooth profile is formed on the peripheral surface of a bottomed cylindrical workpiece by press working. After the peripheral surface of the workpiece is preformed into a shape similar to the tooth profile to be formed, it is fitted into a mold in which the tooth profile to be formed is formed, and the workpiece is pressurized from the inside with a punch to form the tooth profile. It was designed to do so.
（作用）
有底円筒形状の被加工部材の周面を、成形すべき歯形に
準じた形状゛に予備成形する。次いで、この被加工部材
を成形すべき歯形が形成された金型に嵌合し、パンチに
より当該被加工部材の内側から加圧する。被加工部材は
、この加圧により押し拡げられ、予備成形された歯形に
準する部分が前記金型の歯形に圧入されて歯形が成形さ
れる。(Operation) The circumferential surface of a bottomed cylindrical workpiece is preformed into a shape conforming to the tooth profile to be formed. Next, this workpiece is fitted into a mold in which a tooth profile to be molded is formed, and pressure is applied from the inside of the workpiece using a punch. The workpiece is expanded by this pressure, and a portion corresponding to the preformed tooth profile is press-fitted into the tooth profile of the mold to form the tooth profile.
（実施例） 以下本発明の一実施例を添付図面に基づいて詳述する。(Example) An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
第１図は本発明方法に使用するプレス装置を示し、プレ
ス装置ＩＯは、金型（ダイ）１１とパンチ１２及び１３
等により構成されており、金型１１には歯車を形成する
ための穴１１ａが形成され、その内面には周方向に沿っ
て所定のピッチで歯形１１ｂ（第３図）が刻設されてい
る。各歯の部分１１ｃは、第５図に拡大して示すように
当該山１１ｃの中央を頂点として両側に向かってフロー
アングルθで僅かなテーパをなす屋根状に形成されてい
る。このフローアングルθは、歯形の成形時に歯形１１
ｂに被加工部材を充填させるへく被加工部材に流動性を
付与するためのもので、１〜２°程度の極めて小さい角
度に設定されている。FIG. 1 shows a press device used in the method of the present invention, and the press device IO includes a mold (die) 11 and punches 12 and 13.
A hole 11a for forming a gear is formed in the mold 11, and tooth profiles 11b (Fig. 3) are carved on the inner surface at a predetermined pitch along the circumferential direction. . As shown in an enlarged view in FIG. 5, each tooth portion 11c is formed in the shape of a roof, with the peak at the center of the peak 11c and slightly tapered toward both sides at a flow angle θ. This flow angle θ is determined by the tooth profile 11 when forming the tooth profile.
This is to give fluidity to the workpiece, and is set at an extremely small angle of about 1 to 2 degrees.
パンチ１２は、歯形成形時に被加工部材を内側から加圧
して当該被加工部材の歯となる部分を金型１１の歯形１
１ｂ内に充填させるためのものである。The punch 12 applies pressure to the workpiece from the inside during tooth forming to form the teeth of the workpiece into the tooth profile 1 of the mold 11.
This is for filling the inside of 1b.
また、パンチ１３は、歯形の成形時における被加工部材
の逃げ流出を抑えるためのもので、パンチ１２が軸方向
に摺動可能な孔１３ａが穿設されており、当該孔１３ａ
の下端１３ｂは金型１１の穴１１ａに嵌合し、且つ被加
工部材側の上端に当接して当該被加工部材の逃げを抑え
るようになっている。これらのパンチ１２．１３は、同
期・して上下動し、パンチ１３が下降して被加工部材の
周縁部に当接した後パンチ１２が下降する。Further, the punch 13 is used to suppress escape and outflow of the workpiece during tooth profile forming, and is provided with a hole 13a through which the punch 12 can slide in the axial direction.
The lower end 13b fits into the hole 11a of the mold 11 and comes into contact with the upper end on the side of the workpiece to prevent the workpiece from escaping. These punches 12, 13 move up and down synchronously, and after the punch 13 descends and comes into contact with the peripheral edge of the workpiece, the punch 12 descends.
以下に歯形の成形方法を説明する。The tooth profile forming method will be explained below.
先ず、第６図に示すように円板状のブランクから有底円
筒形状のドローに形成された被加工部材１５の周面１５
ａに、金型１１の歯形１１ｂに準じる程度の歯形１５ｂ
を予備成形により形成する。次いで、第１図に２点鎖線
で示すように金型１１内に挿入し、当該金型１１の歯形
１１ｂに被加工部材１５の歯形１５ｂを合致させる。次
いで、第２図に示すようにパンチ１３を下降させて金型
１１上に載置固定し、孔１３ ａの開口端１３ｂを被加
工部材１５の開口端１５ｃに当接させる。これにより被
加工部材１５は、上方への逃げが抑えられる。First, as shown in FIG. 6, the peripheral surface 15 of the workpiece 15 is formed from a disc-shaped blank into a bottomed cylindrical draw.
A has a tooth profile 15b similar to the tooth profile 11b of the mold 11.
is formed by preforming. Next, it is inserted into the mold 11 as shown by the two-dot chain line in FIG. 1, and the tooth profile 15b of the workpiece 15 is made to match the tooth profile 11b of the die 11. Next, as shown in FIG. 2, the punch 13 is lowered and fixed onto the mold 11, and the open end 13b of the hole 13a is brought into contact with the open end 15c of the workpiece 15. This prevents the workpiece 15 from escaping upward.
このようにして金型１１への被加工部材１５の取り付け
が終了した後、パンチ１２を下降させて被加工部材１５
内に圧入する。これにより被加工部材１５は第３図に矢
印で示すように内側から加圧され、各歯形１５ｂが金型
１１の各歯形１１ｂに圧入される。このとき金型１１の
各歯１１ｃにフローアングルθが設けられているために
、被加工部材１５の山１１ｃに圧接する部分が矢印で示
すように傾斜面に沿って左右両側に押されて歯形１５ｂ
の部分と共に金型１１の歯形１１ｂに流れ込む。この結
果、被加工部材１５の歯形１５ｂは、金型１１の歯形１
１ｂ内に十分に充填され、第４図に示すように金型１１
の歯形１１ｂに対応した高精度の歯１５ｂ′が成形され
る。After the attachment of the workpiece 15 to the mold 11 is completed in this way, the punch 12 is lowered to attach the workpiece 15 to the mold 11.
Press fit inside. As a result, the workpiece 15 is pressurized from the inside as shown by arrows in FIG. 3, and each tooth profile 15b is press-fitted into each tooth profile 11b of the mold 11. At this time, since each tooth 11c of the mold 11 is provided with a flow angle θ, the portion that comes into pressure contact with the peak 11c of the workpiece 15 is pushed to the left and right sides along the inclined surface as shown by the arrow, resulting in a tooth shape. 15b
It flows into the tooth profile 11b of the mold 11 together with the part. As a result, the tooth profile 15b of the workpiece 15 is the same as the tooth profile 1 of the mold 11.
1b is sufficiently filled, and the mold 11 is completely filled as shown in FIG.
A highly accurate tooth 15b' corresponding to the tooth profile 11b is formed.
被加工部材１５への歯形の成形が終了した後、パンチ１
３を引き上げ、次いでパンチ１３を引き上げて金型１１
から被加工部材１５を取り出す。このようにして板金歯
車１５°（第７図）が形成される。After forming the tooth profile on the workpiece 15, the punch 1
3, then pull up the punch 13 to release the mold 11.
The workpiece 15 is taken out from the machine. In this way, a sheet metal gear 15° (FIG. 7) is formed.
ところで、上述のようにして成形された歯車即ち、被加
工部材１５は、第４図に示すようにその内面１５ｄがパ
ンチ１２の外面と同一の滑らかな曲面となり、しかも、
歯車全体即ち、各歯１５ｂ’及び各谷部１５ｅが高密度
となり、剛性が高くなる。従って、この剛性が高くなる
分だけ板厚を薄くして歯車１５゜４゜
の軽量化を図ることが可能である。By the way, the gear formed as described above, that is, the workpiece 15, has an inner surface 15d that is the same smooth curved surface as the outer surface of the punch 12, as shown in FIG.
The entire gear, that is, each tooth 15b' and each trough 15e, has a high density and high rigidity. Therefore, it is possible to reduce the weight of the gear 15.degree. by 4.degree. by reducing the plate thickness by the amount that increases the rigidity.
（発明の効果）
以上説明したように本発明によれば、有底円筒形状の被
加工部材の周面にプレス加工により歯形を成形する板金
歯形の成形方法において、前記被加工部材の周面を成形
すべき歯形に準じた形状に予備成形した後成形すべき歯
形が形成された金型に嵌合し、パンチにより前記被加工
部材を内側から加圧して前記歯形を成形するようにした
ので、歯形を高精度に成形することができると共に歯車
の剛性を高めることができ、これに伴い歯車の軽量化を
図ることが可能となる。また、生産性の向上も図ること
ができる等の優れた効果がある。(Effects of the Invention) As explained above, according to the present invention, in the sheet metal tooth profile forming method of forming a tooth profile on the circumferential surface of a bottomed cylindrical workpiece by press working, the circumferential surface of the workpiece is After being preformed into a shape similar to the tooth profile to be molded, the workpiece is fitted into a mold in which the tooth profile to be molded is formed, and the workpiece is pressurized from the inside with a punch to form the tooth profile. It is possible to form the tooth profile with high precision, increase the rigidity of the gear, and thereby reduce the weight of the gear. Further, there are excellent effects such as improvement in productivity.
第１図は本発明に係る板金歯形の成形方法に使用するプ
レス装置の要部断面図、第２図は第１図のプレス装置に
より歯形を成形する状態を示す図、第３図は第１図の金
型に被加工部材を挿入した状態を示す要部断面、第４図
は第３図の状態から歯形を成形した後の状態を示す図、
第５図は第３図の金型の山部の形状を示す拡大図、第６
図は予備成形を施した被加工部材の斜視図、第７図は本
発明方法により形成した板金歯車の斜視図、第８図は従
来の板金歯形の成形方法の手順を示す図である。
■・・・板、２・・・ブランク、３・・・ドロー、１０
・・・プレス装置、１１・・・金型、ｌｌｂ・・・歯形
、１２．１３・・・パンチ、１５・・・被加工部材、１
５′ ・・・板金歯車。
出願人 三菱自動車工業株式会社
代理人 弁理士 長 門 侃 二
第
図
第
２図
第５図
第３図
第４図
第６図
第７図FIG. 1 is a sectional view of the main parts of a press device used in the method of forming a sheet metal tooth profile according to the present invention, FIG. 2 is a diagram showing a state in which a tooth profile is formed by the press device of FIG. 1, and FIG. Figure 4 is a cross-section of the main part showing the state in which the workpiece is inserted into the mold; Figure 4 is a diagram showing the state after the tooth profile has been molded from the state shown in Figure 3;
Figure 5 is an enlarged view showing the shape of the peak of the mold in Figure 3;
FIG. 7 is a perspective view of a preformed workpiece, FIG. 7 is a perspective view of a sheet metal gear formed by the method of the present invention, and FIG. 8 is a diagram showing the procedure of a conventional sheet metal tooth profile forming method. ■... Board, 2... Blank, 3... Draw, 10
...Press device, 11...Mold, llb...Tooth profile, 12.13...Punch, 15...Workpiece member, 1
5'... Sheet metal gear. Applicant Mitsubishi Motors Corporation Agent Patent Attorney Kan Nagato Figure 2 Figure 5 Figure 3 Figure 4 Figure 6 Figure 7
Claims (1)
形を成形する板金歯形の成形方法において、前記被加工
部材の周面を成形すべき歯形に準じた形状に予備成形し
た後成形すべき歯形が形成された金型に嵌合し、パンチ
により前記被加工部材を内側から加圧して前記歯形を成
形することを特徴とする板金歯形の成形方法。In a sheet metal tooth profile forming method in which a tooth profile is formed by press working on the circumferential surface of a bottomed cylindrical workpiece, the circumferential surface of the workpiece should be preformed into a shape conforming to the tooth profile to be formed, and then formed. A method for forming a sheet metal tooth profile, comprising fitting the workpiece into a mold in which a tooth profile has been formed, and pressurizing the workpiece from the inside with a punch to form the tooth profile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18380090A JPH0471749A (en) | 1990-07-11 | 1990-07-11 | Method for forming sheet metal tooth profile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18380090A JPH0471749A (en) | 1990-07-11 | 1990-07-11 | Method for forming sheet metal tooth profile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0471749A true JPH0471749A (en) | 1992-03-06 |
Family
ID=16142130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18380090A Pending JPH0471749A (en) | 1990-07-11 | 1990-07-11 | Method for forming sheet metal tooth profile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0471749A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5380254A (en) * | 1992-09-30 | 1995-01-10 | Caterpillar Inc. | Finished forged sprocket segment method and apparatus |
-
1990
- 1990-07-11 JP JP18380090A patent/JPH0471749A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5380254A (en) * | 1992-09-30 | 1995-01-10 | Caterpillar Inc. | Finished forged sprocket segment method and apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4580431A (en) | Method and apparatus for producing a stepped hollow article | |
| JPS60133933A (en) | Press forming method | |
| JP3975715B2 (en) | Press forming method and apparatus used therefor | |
| JP2013230488A (en) | Forming method for pressed part, manufacturing method for pressed part and forming die for pressed part | |
| JP4433649B2 (en) | Method for forming a product with a flange | |
| JPH0471749A (en) | Method for forming sheet metal tooth profile | |
| JPS63203241A (en) | Forming method for flanged boss | |
| JPH0665442B2 (en) | Cutting method | |
| JPS61269938A (en) | Manufacture of piston | |
| JPS5923894B2 (en) | How to manufacture gears from flat plate materials | |
| JPS6182944A (en) | Production of shaft component with large-sized flange | |
| JP2002224788A (en) | Method for forging inner race of constant-velocity universal joint | |
| JPH0551604A (en) | Device for press-forming powder compact to be sintered | |
| JP4177191B2 (en) | Closed forging device and closed forging method | |
| JP2701122B2 (en) | Boss part forming method | |
| JPH0155062B2 (en) | ||
| KR0135659B1 (en) | Method for making double cylinder type pulley and device thereof | |
| JPS58112614A (en) | Press die | |
| JPH0360839A (en) | Manufacture of outer race of constant velocity joint | |
| JPS61255740A (en) | Precise forging method for gear wheel | |
| JP2002307130A (en) | Ring gear manufacturing method, and device used therefor | |
| JPS58122133A (en) | Method and device for processing punching hole | |
| JPH04167940A (en) | Manufacture of sprocket for roller chain | |
| JPS63144828A (en) | Press forming method | |
| JP2577030B2 (en) | Forging equipment |