JPH10230396A - Powder molding device for helical gear - Google Patents
Powder molding device for helical gearInfo
- Publication number
- JPH10230396A JPH10230396A JP3804997A JP3804997A JPH10230396A JP H10230396 A JPH10230396 A JP H10230396A JP 3804997 A JP3804997 A JP 3804997A JP 3804997 A JP3804997 A JP 3804997A JP H10230396 A JPH10230396 A JP H10230396A
- Authority
- JP
- Japan
- Prior art keywords
- die
- helical
- green compact
- rotating
- powder molding
- 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
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は粉末冶金法による
はすば歯車、特に図５に例示したようなはすばの傘歯車
（イ）やボス付きはすば歯車（ロ）の製造に関するもの
である。ちなみに一般に多く用いられる“曲がり歯傘歯
車”をも含め、この明細書では学術用語の“はすば傘歯
車”を統一使用する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the manufacture of helical gears by powder metallurgy, and more particularly to the manufacture of helical bevel gears (a) and bossed helical gears (b) as illustrated in FIG. It is. By the way, in this specification, the term "helical bevel gear" is used in a unified manner, including the "helical bevel gear" which is generally used.
【０００２】[0002]
【従来の技術】粉末冶金における粉末の成形を焼結歯車
を例として略述すると、歯車の歯形を成形するダイ，下
パンチおよび歯車の軸孔を成形するコアロッドで形成す
るダイキャビティ内に充填した原料粉末を上パンチと下
パンチとの間に圧縮することにより、所望の形状の製品
（圧粉体）が得られる。2. Description of the Related Art A powder molding in powder metallurgy is briefly described by taking a sintered gear as an example. A die cavity formed by a die for forming a gear tooth profile, a lower punch, and a core rod for forming a shaft hole of the gear is filled. By compressing the raw material powder between the upper punch and the lower punch, a product (compact) having a desired shape is obtained.
【０００３】粉末の成形に際し、圧粉密度の均一化を図
るためダイと下パンチとは相対的に上下動する訳である
が、そのいずれをプレスに固定するかにより、ダイセッ
トの組み方がダイ固定，下パンチ可動式と、一般にウイ
ズドロアルダイセットと呼ばれる下パンチ固定，ダイ可
動式とに大別されるが、両方式とも粉末成形の基本的原
理に差違はない。後述するこの発明は便宜上後者の方式
で説明してあるが、両方式の何れにも適用可能なもので
ある。In molding powder, the die and the lower punch move up and down relatively in order to make the green compact density uniform. Depending on which of them is fixed to the press, the method of assembling the die set is different. Fixed and movable lower punch types are generally classified into lower punch fixed and die movable types, which are generally called withdrawal die sets. Both types have no difference in the basic principle of powder molding. The present invention described later is described in the latter system for convenience, but can be applied to both systems.
【０００４】図６は傘歯車を成形する下パンチ固定式の
従来装置の例であるが、この図面で下パンチ固定式ダイ
セットの一般的構成を先ず簡単に述べると、下パンチ２
０はグランドプレート５２を介してプレスの基台に固定
されている。一方ダイ１０はダイプレート５１に，コア
ロッド３０はプレスの下ラム６０に固定されたコラムプ
レート５３に装着され、ダイプレートとコラムプレート
とはグランドプレートを貫通するコラム５４で連結され
ている。FIG. 6 shows an example of a lower punch fixed type conventional apparatus for forming a bevel gear. The general configuration of a lower punch fixed type die set will first be briefly described in this drawing.
Reference numeral 0 is fixed to a press base via a ground plate 52. On the other hand, the die 10 is mounted on a die plate 51, and the core rod 30 is mounted on a column plate 53 fixed to a lower ram 60 of the press. The die plate and the column plate are connected by a column 54 passing through a ground plate.
【０００５】[0005]
【発明が解決しようとする課題】成形対象品が図５
（イ）の如きはすば傘歯車の場合、ダイ内で圧縮成形さ
れた圧粉体は、図６（イ）に示されている如くその歯部
がダイ１０のはすばの歯形溝１１と螺合しているので、
そのまま垂直に下パンチ２０で押し上げようとしても動
かず、無理をすると圧粉体の脆い歯部が損傷する虞れが
ある。The object to be molded is shown in FIG.
In the case of a helical bevel gear as shown in FIG. 6A, the compact formed by compression in the die has a tooth portion 11 of the helical tooth 11 of the die 10 as shown in FIG. Because it is screwed with
If the lower punch 20 does not move even if it is pushed upward, the brittle teeth of the green compact may be damaged.
【０００６】これを避けるためには圧粉体を回転させれ
ばよい訳であるが、圧粉体の軸孔に図５の如きスプライ
ンやキー溝がある場合は、それを成形するコアロッドの
凸条３１が上パンチおよび下パンチの内径に設けた溝に
嵌合しているため、圧粉体を回転させることができな
い。In order to avoid this, it is sufficient to rotate the green compact. If there is a spline or keyway in the shaft hole of the green compact as shown in FIG. Since the ridges 31 are fitted in the grooves provided on the inner diameters of the upper punch and the lower punch, the green compact cannot be rotated.
【０００７】[0007]
【課題を解決するための手段】この発明は、ダイ１０か
ら圧粉体を押し出す際にダイ１０をその歯形溝１１のリ
ードと等しいリードで回転させることを骨子とするもの
であって、その手段としてダイ１０をダイプレート５１
に回転自在に装着するとともに、押し出す際のダイの下
降運動を利用してダイ１０を回転させる機構を設けたも
のである。以下この発明を、その実施例により詳細に説
明する。According to the present invention, when the compact is extruded from the die 10, the die 10 is rotated by a lead equal to the lead of the tooth-shaped groove 11. The die 10 as the die plate 51
And a mechanism for rotating the die 10 by utilizing the downward movement of the die when the die is pushed out. Hereinafter, the present invention will be described in detail with reference to examples.
【０００８】[0008]
（実施例１） 図１および図２は、図５（イ）に示すは
すば傘歯車を成形する一実施例に係るもので、先ず装置
の構成を説明すると傘歯車の下端面を成形する下パンチ
２０は傘歯車の歯部を成形するダイ１０と嵌合し、その
中心を貫通して傘歯車の軸孔を成形するコアロッド３０
と共にダイキャビティを形成している。そして下パンチ
２０はパンチ台２１を介してグランドプレート５２に固
定され、このグランドプレートは図示を省いたプレスの
基台に固定されている。(Embodiment 1) FIGS. 1 and 2 relate to an embodiment of forming the helical bevel gear shown in FIG. 5A. First, the configuration of the apparatus will be described. The lower punch 20 is fitted with the die 10 that forms the teeth of the bevel gear, and the core rod 30 that penetrates the center thereof and forms the shaft hole of the bevel gear.
Together with the die cavity. The lower punch 20 is fixed to a ground plate 52 via a punch table 21, and the ground plate is fixed to a press base (not shown).
【０００９】傘歯車のはすばに対応する歯形溝１１を備
えるダイ１０は鋼球７０が象徴するスラスト軸受により
ダイプレート５１に回転自在に装着され，コアロッド３
０はプレスの下ラム６０に固定したコラムプレート５３
に固定され、ダイプレートとコラムプレートとはグラン
ドプレートを貫通するコラム５４で連結されている。従
ってダイ１０とコアロッド３０は下ラム６０の昇降につ
れて同時に上下する。A die 10 having a toothed groove 11 corresponding to a helical gear of a bevel gear is rotatably mounted on a die plate 51 by a thrust bearing symbolized by a steel ball 70, and a core rod 3 is provided.
0 is a column plate 53 fixed to the lower ram 60 of the press
, And the die plate and the column plate are connected by a column 54 penetrating the ground plate. Therefore, the die 10 and the core rod 30 move up and down at the same time as the lower ram 60 moves up and down.
【００１０】またダイ１０とパンチ台２１とは、パンチ
台２１の外周面に設けたはすば２２とダイ１０を下方に
延長してその内周に設けたはすば溝１２との螺合によっ
て、常時係合されている。このはすば２２およびはすば
溝１２は、傘歯車のはすばに対応するダイの歯形溝１１
とリードを等しく設定してある。一方、傘歯車の上端面
を成形する上パンチ４０は、上ラムプレート５５に固定
され、図示を省略したプレスの上ラムにより上下する。The die 10 and the punch table 21 are screwed together with a helical groove 22 provided on the outer peripheral surface of the punch table 21 and a helical groove 12 provided on the inner circumference of the die 10 by extending the die 10 downward. Is always engaged. The helical 22 and the helical groove 12 correspond to the helical groove 11 of the die corresponding to the helical of the bevel gear.
And lead are set equal. On the other hand, the upper punch 40 that forms the upper end surface of the bevel gear is fixed to the upper ram plate 55, and moves up and down by an upper ram (not shown).
【００１１】図５の傘歯車はその軸孔にスプラインがあ
るので、これを成形するための凸条３１が所要数、コア
ロッド３０の上部外周に設けられる。そして上・下パン
チの内径にも、コアロッドの凸条３１に対応する溝が設
けられる。ちなみにキー溝もスプラインも訳は同じなの
で、図面には凸条３１を一本だけ示してある。The bevel gear shown in FIG. 5 has a spline in its shaft hole. Therefore, a required number of ridges 31 for forming the spline are provided on the upper outer periphery of the core rod 30. A groove corresponding to the ridge 31 of the core rod is also provided on the inner diameter of the upper and lower punches. By the way, the key groove and the spline are the same, so only one ridge 31 is shown in the drawing.
【００１２】次にこの装置の作動を説明すると、図１
（イ）はダイキャビティに粉末を充填した状態を、
（ロ）は上パンチ４０が下降し粉末の圧縮成形が終了し
た状態を、図２（ハ）は上パンチ４０を復帰させ、圧粉
体の押し出しを開始する直前の状態を、（ニ）は圧粉体
がダイから抜け出した状態を示している。なおこの
（イ）〜（ロ）の過程では、両押し効果を得るためにダ
イ１０が若干下降するのに伴って下パンチ２０は相対的
に上昇し、粉末を押し上げる。Next, the operation of this device will be described.
(A) shows the state where the die cavity is filled with powder,
FIG. 2C shows the state immediately after the upper punch 40 has been lowered and the compression molding of the powder has been completed, FIG. 2C shows the state immediately before the upper punch 40 is returned, and the extrusion of the green compact starts, and FIG. This shows a state in which the green compact has come out of the die. In the processes (a) to (b), the lower punch 20 relatively rises as the die 10 slightly descends to obtain the double pushing effect, and pushes up the powder.
【００１３】（ハ）〜（ニ）の過程がダイの引き下げに
より圧粉体をダイから排出（便宜上この明細書では押し
出しという）する問題の工程で、圧粉体の歯部はダイ１
０のはすばの歯形溝１１と螺合しているので、押し出し
に際して歯形溝に沿って回転させつつ歯形溝から離さな
いと、圧粉体の脆い歯部が損傷する。The steps (c) to (d) are steps in which the green compact is discharged from the die by pulling down the die (for convenience, this is referred to as extrusion).
Since it is screwed with the tooth profile groove 11 of the helical No. 0, the fragile tooth portion of the green compact is damaged if it is not separated from the tooth profile groove while rotating along the tooth profile during extrusion.
【００１４】この実施例においては、（ハ）の状態から
ダイプレート５１を下降させると、これに回転自在に装
着されているダイ１０はその下部のはすば溝１２がパン
チ台２１のはすば２２に案内され、ダイの歯形溝１１の
リードと等しいリードで回転し乍ら下降する。従って圧
粉体の歯部が歯形溝１１に沿って相対的に回転し乍ら無
理なく離脱するので、押し出しに伴い圧粉体の損傷を生
じることはない。なおダイ１０の歯形溝部を除く内周上
部には、押し出し時の摩擦抵抗を軽減するため抜きテー
パーを付けてあるが、これは慣用手段である。In this embodiment, when the die plate 51 is lowered from the state of (c), the die 10 rotatably mounted on the die plate 51 has the lower helical groove 12 at the lower part thereof, and the lower part of the punch table 21 has the helical groove. The roller is guided by the shaft 22 and descends while rotating with a lead equal to the lead of the tooth profile groove 11 of the die. Therefore, since the tooth portion of the green compact is separated without difficulty while relatively rotating along the tooth groove 11, the green compact is not damaged by the extrusion. The upper part of the inner periphery of the die 10 excluding the tooth-shaped groove is provided with a withdrawal taper to reduce frictional resistance during extrusion, but this is a conventional means.
【００１５】（実施例２） 次にこの発明の方式を図５
（ロ）のボス付きはすば歯車の成形に適用した実施例
を、図３および図４について説明する。装置の基本的な
構成と各部材の名称は実施例１の場合と共通している。
但しダイ１０と下パンチ２０の係合手段について、実施
例１の場合はダイ１０に設けたはすば溝１２と螺合する
はすば２２をパンチ台２１の外周面に設けたのに対し、
実施例２ではこの部分を独立したガイド部材２３として
その外周面にはすば２２を設け、これを下パンチ２０と
は別個にグランドプレート５２に固定した点が異なって
いる。このガイド部材２３は一体の環状でもよく、数個
の扇状片に分割して、円周上に配置してもよい。これら
と実施例１の何れによるかは、各部材の加工の難易とか
ガイド部材２３の他製品成形への流用可能性などに応じ
て適宜に選択される。(Embodiment 2) Next, the method of the present invention is shown in FIG.
An embodiment applied to the molding of a helical gear with a boss (b) will be described with reference to FIGS. The basic configuration of the device and the names of the members are common to those in the first embodiment.
However, as for the engagement means between the die 10 and the lower punch 20, in the case of the first embodiment, a helical 22 screwed with the helical groove 12 provided on the die 10 is provided on the outer peripheral surface of the punch table 21. ,
The second embodiment is different from the second embodiment in that this portion is formed as an independent guide member 23 and a skirt 22 is provided on the outer peripheral surface thereof, and this is fixed to a ground plate 52 separately from the lower punch 20. The guide member 23 may be an integral ring, or may be divided into several fan-shaped pieces and arranged on the circumference. Which of these and Embodiment 1 is used is appropriately selected according to the difficulty of processing each member, the possibility of diverting the guide member 23 to the molding of another product, and the like.
【００１６】なお上パンチ側は、成形対象品がはすばの
平歯車でしかもその軸孔にキー溝がある関係から、実施
例１の場合より構造がやや複雑になっている。即ち上パ
ンチ４０を中心軸と同心の円筒面で内外２部材に分割し
てキー溝付き軸孔に対応する内側部材４０Ａは上ラムプ
レート５５に固定する一方、ダイの歯形溝１１と螺合す
る外側部材４０Ｂは上ラムプレート５５に、スラスト軸
受７０により回転自在に装着してある。The structure of the upper punch side is slightly more complicated than that of the first embodiment because the product to be molded is a helical spur gear and the shaft hole has a keyway. That is, the upper punch 40 is divided into two members, inner and outer, with a cylindrical surface concentric with the center axis, and the inner member 40A corresponding to the shaft hole with the key groove is fixed to the upper ram plate 55 while being screwed into the tooth profile groove 11 of the die. The outer member 40B is rotatably mounted on the upper ram plate 55 by a thrust bearing 70.
【００１７】また外側部材４０Ｂとダイ１０との歯形の
位相合わせのため外側部材４０Ｂの上部外周にはすば４
１を設け、このはすば４１に螺合するはすば溝８１を備
えるガイドプレート８０を上ラムプレート５５に、ピン
８２とスプリング８３により上下自在に懸垂してある。
その下部に設けたスペーサー８４は上パンチがダイと嵌
合する瞬間に両者の歯形が合致するように、その長さが
設定されている。但しこれらの方式自体は特公昭４８−
３７５４４号および特公昭５１−４３０３号で本出願人
が開示した技術であって、この発明の要旨ではない。ち
なみに成形品の軸孔が単なる丸孔の場合は、上パンチの
分割を要しないことは勿論である。The outer periphery of the upper part of the outer member 40B is aligned with the outer periphery of the outer member 40B for phase matching of the tooth shape of the outer member 40B and the die 10.
1, a guide plate 80 having a helical groove 81 screwed to the helical 41 is suspended from the upper ram plate 55 by pins 82 and springs 83 so as to be freely movable.
The length of the spacer 84 provided at the lower portion is set such that the tooth shapes of both spacers match at the moment when the upper punch is fitted to the die. However, these systems are themselves
This is a technique disclosed by the present applicant in Japanese Patent No. 37544 and Japanese Patent Publication No. 51-4303, and is not the gist of the present invention. Incidentally, when the shaft hole of the molded product is a simple round hole, it is needless to say that the upper punch need not be divided.
【００１８】次にこの装置の作動を説明すると、図３
（イ）はダイキャビティに粉末を充填した状態を、
（ロ）は上パンチ４０が下降し粉末の圧縮成形が終了し
た状態を、図４（ハ）は上パンチ４０を復帰させ、圧粉
体の押し出しを開始する直前の状態を、（ニ）は圧粉体
がダイから抜け出した状態を示している。なおこの
（イ）〜（ロ）の過程では、上パンチの内側部材４０Ａ
は回転せずに，外側部材４０Ｂは回転しつつダイ１０と
嵌合し、原料粉を圧縮成形する。なおこの間、ダイ１０
が回転しつつ若干下降するのに伴って下パンチ２０は相
対的に上昇し、粉末を押し上げて両押し効果を奏する。Next, the operation of this apparatus will be described.
(A) shows the state where the die cavity is filled with powder,
4B shows a state in which the upper punch 40 has been lowered and the compression molding of the powder has been completed, FIG. 4C shows a state immediately before the upper punch 40 is returned to start extruding the compact, and FIG. This shows a state in which the green compact has come out of the die. In the processes (a) to (b), the inner member 40A of the upper punch is used.
The outer member 40B is fitted to the die 10 while rotating without rotating, and the raw material powder is compression-molded. During this time, the die 10
The lower punch 20 relatively rises as the roller rotates and slightly lowers, and pushes up the powder to produce a double pressing effect.
【００１９】（ハ）〜（ニ）の過程が実施例１の場合と
同様ダイの引き下げにより圧粉体をダイから押し出す問
題の工程であるが、実施例２においては、（ハ）の状態
からダイプレート５１を下降させると、これに回転自在
に装着されているダイ１０はその下部のはすば溝１２が
ガイド部材２３のはすば２２に案内され、ダイの歯形溝
１１のそれと等しいリードで回転し乍ら下降する。The steps (c) to (d) are steps in which the green compact is pushed out of the die by pulling down the die as in the case of the first embodiment. When the die plate 51 is lowered, the die 10 rotatably mounted on the die plate is guided by the helical groove 12 of the lower part of the helical groove 12 of the guide member 23 and the lead is equal to that of the tooth groove 11 of the die. It descends while rotating.
【００２０】従ってダイの歯形溝１１は、実施例１の場
合と同じくコアロッドの凸条３１に拘束されて回転しな
い圧粉体の歯部に沿って回転し乍ら無理なく離脱するの
で、押し出しに伴い圧粉体の損傷を生じることはない。
この様に、この発明は図５の（イ）のはすば傘歯車に限
らず、同図（ロ）の如きボス付きはすば歯車にも全く同
様にして適用することができるものである。Therefore, the tooth-shaped groove 11 of the die is easily released while rotating along the tooth portion of the compact which is not rotated by being restrained by the ridge 31 of the core rod as in the case of the first embodiment. Accordingly, the compact is not damaged.
As described above, the present invention can be applied not only to the helical bevel gear of FIG. 5A but also to a helical gear with a boss as shown in FIG. .
【００２１】[0021]
【発明の効果】以上詳述したように、この発明により、
従来は圧粉後の抜き出し工程に問題があったはすば傘歯
車やボス付きはすば歯車，特にその軸孔にキー溝やスプ
ラインのある製品の粉末成形が容易になし得るようにな
った。As described above in detail, according to the present invention,
Conventionally, there was a problem in the extraction process after powder compaction. Powder molding of helical bevel gears and helical gears with bosses, especially products with keyways or splines in their shaft holes, has become easier. .
【図面の簡単な説明】[Brief description of the drawings]
【図１】図５の成形品に係る、この発明の一実施例を説
明する図面である。FIG. 1 is a drawing for explaining an embodiment of the present invention relating to a molded article of FIG.
【図２】この発明の一実施例を説明する、図１の続きの
図面である。FIG. 2 is a continuation of FIG. 1 illustrating an embodiment of the present invention.
【図３】この発明の他の実施例を説明する図面である。FIG. 3 is a drawing for explaining another embodiment of the present invention.
【図４】この発明の他の実施例を説明する、図３の続き
の図面である。FIG. 4 is a continuation of FIG. 3 illustrating another embodiment of the present invention.
【図５】この発明における成形対象品の形状を例示する
図面である。FIG. 5 is a drawing illustrating the shape of a molded article according to the present invention.
【図６】従来の成形装置における問題点を説明する図面
である。FIG. 6 is a view for explaining a problem in a conventional molding apparatus.
１０…ダイ，１１…歯形溝，１２…はすば溝，２０…下
パンチ ２１…パンチ台，２２…はすば，２３…ガイド部材 ３０…コアロッド，３１…凸条，４０…上パンチ，４１
…はすば ５１…ダイプレート，５２…グランドプレート，５３…
コラムプレート ５４…コラム，５５…上ラムプレート ６０…下ラム，７０…鋼球（スラスト軸受），８０…ガ
イドプレート ８１…はすば溝，８２…ピン，８３…スプリング，８４
…スペーサーReference Signs List 10 die, 11 tooth profile groove, 12 helical groove, 20 lower punch 21 punch base, 22 helical, 23 guide member 30 core rod, 31 convex ridge, 40 upper punch, 41
... Hasuba 51 ... Die plate, 52 ... Ground plate, 53 ...
Column plate 54 ... column, 55 ... upper ram plate 60 ... lower ram, 70 ... steel ball (thrust bearing), 80 ... guide plate 81 ... helical groove, 82 ... pin, 83 ... spring, 84
…spacer
Claims (8)
するダイキャビティ内に充填した原料粉末を上パンチと
下パンチとの間に圧縮して傘歯車形状の圧粉体を得る粉
末成形装置において、成形された圧粉体の抜き出しに際
し、不回転の下パンチに対して、ダイが傘歯車のねじれ
角に同期して回転しつつ相対的に昇降するよう構成した
ことを特徴とする、はすば傘歯車の粉末成形装置。1. A powder molding apparatus for compressing a raw material powder filled in a die cavity formed by a die, a lower punch, and a core rod between an upper punch and a lower punch to obtain a bevel gear-shaped green compact. When removing the pressed green compact, the die is configured to rotate up and down relative to the non-rotating lower punch while rotating in synchronization with the torsion angle of the bevel gear. Gear powder molding equipment.
転自在に装着するとともに、下パンチの下部外周に設け
たはすばとダイの下方延長部の内周に設けたはすば溝と
を常時螺合させた、請求項１に記載のはすば傘歯車の粉
末成形装置。2. As means for rotating the die, the die is rotatably mounted, and the helical groove provided on the lower periphery of the lower punch and the helical groove provided on the inner periphery of the lower extension of the die are provided. The powder molding device for a helical bevel gear according to claim 1, wherein the powder molding device is always screwed.
転自在に装着するとともに、下パンチから分離されたガ
イド部材の外周に設けたはすばとダイの下方延長部の内
周に設けたはすば溝とを常時螺合させた、請求項１に記
載のはすば傘歯車の粉末成形装置。3. As means for rotating the die, the die is rotatably mounted, and the helical member provided on the outer periphery of the guide member separated from the lower punch and the inner periphery of the lower extension of the die are provided. The powder molding device for a helical bevel gear according to claim 1, wherein the helical groove is always screwed with the helical groove.
するダイキャビティ内に充填した原料粉末を上下のパン
チ間に圧縮してはすば歯車状の圧粉体を得る粉末成形装
置において、成形された圧粉体の抜き出しに際し不回転
の下パンチに対してダイがはすば歯車のねじれ角に同期
して回転しつつ相対的に昇降するよう構成したことを特
徴とする、ボス付きはすば歯車の粉末成形装置。4. A powder molding apparatus which obtains a helical gear-shaped green compact by compressing raw material powder filled in a die cavity formed by a die, a lower punch and a core rod between upper and lower punches. A helical gear with a boss, characterized in that the die is configured to rotate up and down relatively while rotating in synchronization with the torsion angle of the helical gear with respect to the non-rotating lower punch when extracting the green compact. Powder molding equipment.
転自在に装着するとともに、下パンチの下部外周に設け
たはすばとダイの下方延長部の内周に設けたはすば溝と
を常時螺合させた、請求項４に記載のボス付きはすば歯
車の粉末成形装置。5. As means for rotating the die, the die is rotatably mounted, and the helical groove provided on the lower periphery of the lower punch and the helical groove provided on the inner periphery of the lower extension of the die are provided. The powder molding apparatus for a helical gear with a boss according to claim 4, which is always screwed.
転自在に装着するとともに、下パンチから分離されたガ
イド部材の外周に設けたはすばとダイの下方延長部の内
周に設けたはすば溝とを常時螺合させた、請求項４に記
載のボス付きはすば歯車の粉末成形装置。6. As means for rotating the die, the die is rotatably mounted, and the helical member provided on the outer periphery of the guide member separated from the lower punch and the inner member provided on the inner periphery of the lower extension of the die are provided. 5. The powder molding apparatus for a helical gear with a boss according to claim 4, wherein the helical groove is always screwed with the helical groove.
ンに対応する凸条をコアロッドの外周に設けた請求項
１，請求項２または請求項３に記載のはすば傘歯車の粉
末成形装置。7. The powder molding of a helical bevel gear according to claim 1, wherein a ridge corresponding to a key groove or a spline of the helical gear shaft hole is provided on an outer periphery of the core rod. apparatus.
ンに対応する凸条をコアロッドの外周に設けた請求項
４，請求項５または請求項６に記載のボス付きはすば歯
車の粉末成形装置。8. The bossed helical gear powder according to claim 4, wherein a ridge corresponding to the key groove or the spline of the helical gear shaft hole is provided on the outer periphery of the core rod. Molding equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03804997A JP3753829B2 (en) | 1997-02-21 | 1997-02-21 | Helical gear powder molding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03804997A JP3753829B2 (en) | 1997-02-21 | 1997-02-21 | Helical gear powder molding equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10230396A true JPH10230396A (en) | 1998-09-02 |
| JP3753829B2 JP3753829B2 (en) | 2006-03-08 |
Family
ID=12514676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03804997A Expired - Lifetime JP3753829B2 (en) | 1997-02-21 | 1997-02-21 | Helical gear powder molding equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3753829B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004298917A (en) * | 2003-03-31 | 2004-10-28 | Hitachi Powdered Metals Co Ltd | Method and device for molding umbrella-shaped powder compact |
| JP2005199332A (en) * | 2004-01-19 | 2005-07-28 | Sumitomo Denko Shoketsu Gokin Kk | Powder molding die device |
| JP2005305457A (en) * | 2004-04-16 | 2005-11-04 | Nissan Motor Co Ltd | Powder molding die and powder molding method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100581691C (en) * | 2006-12-04 | 2010-01-20 | 姜卫亮 | Trochoid spiral angular wheel shaping mold and manufacturing method thereof |
-
1997
- 1997-02-21 JP JP03804997A patent/JP3753829B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004298917A (en) * | 2003-03-31 | 2004-10-28 | Hitachi Powdered Metals Co Ltd | Method and device for molding umbrella-shaped powder compact |
| JP2005199332A (en) * | 2004-01-19 | 2005-07-28 | Sumitomo Denko Shoketsu Gokin Kk | Powder molding die device |
| JP2005305457A (en) * | 2004-04-16 | 2005-11-04 | Nissan Motor Co Ltd | Powder molding die and powder molding method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3753829B2 (en) | 2006-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6165400A (en) | Compacted-powder opposed twin-helical gears and method | |
| JP3031647B2 (en) | Extruder for powder material | |
| KR960005887B1 (en) | Devices for forming sintered helical gears | |
| JPH10230396A (en) | Powder molding device for helical gear | |
| EP0899036B1 (en) | Apparatus for and method of sizing helical gears | |
| JP2938676B2 (en) | Extrusion molding method and molding apparatus for powder material | |
| JPH0780078B2 (en) | Die set in rotary powder compression molding machine | |
| JPH0331537B2 (en) | ||
| JPH01150427A (en) | Apparatus for producing helical ring gear | |
| JPH0685971B2 (en) | Helical gear formation method | |
| JPH09262697A (en) | Powder compacting device | |
| JP3753824B2 (en) | Helical gear powder molding equipment | |
| JPH05302102A (en) | Powder compacting method | |
| JP2782364B2 (en) | Method of manufacturing block ring for synchronous mesh transmission | |
| JP3662902B2 (en) | Sizing method for specially shaped cylindrical parts | |
| JP3151798B2 (en) | Mold for powder molding | |
| JP3158244B2 (en) | Method for manufacturing multi-stage helical gear and mold for powder molding | |
| JPS632193Y2 (en) | ||
| JPH10180494A (en) | Powder compacting method of helical gear and device therefor | |
| JP3324110B2 (en) | Method for producing multi-stage helical gear and powder molding die thereof | |
| JP2010149169A (en) | Mold device for powder compaction and method of forming powder compact | |
| JPH11188448A (en) | Tooth form molding device | |
| JP3203925B2 (en) | Method and apparatus for compression molding of powder molded product | |
| JPH01166847A (en) | Manufacturing device for stepped hollow gear | |
| JPH05111732A (en) | Method and device for plastically working bevel gear |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040511 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20040628 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20040610 |
|
| A911 | Transfer of reconsideration by examiner before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20040709 |
|
| A912 | Removal of reconsideration by examiner before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A912 Effective date: 20040903 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050920 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20051214 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081222 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091222 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101222 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101222 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111222 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111222 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121222 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121222 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131222 Year of fee payment: 8 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| EXPY | Cancellation because of completion of term |