JPH06200Y2 - Rolled flat die - Google Patents

Rolled flat die

Info

Publication number
JPH06200Y2
JPH06200Y2 JP1985195235U JP19523585U JPH06200Y2 JP H06200 Y2 JPH06200 Y2 JP H06200Y2 JP 1985195235 U JP1985195235 U JP 1985195235U JP 19523585 U JP19523585 U JP 19523585U JP H06200 Y2 JPH06200 Y2 JP H06200Y2
Authority
JP
Japan
Prior art keywords
tooth
rolling
rolled
height
biting
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
Application number
JP1985195235U
Other languages
Japanese (ja)
Other versions
JPS62105729U (en
Inventor
哲男 引野
啓一 岩城
優 炭谷
誠二 大橋
公正 村山
正治 井川
芳雄 佐々木
忍 金子
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nachi Fujikoshi Corp
Toyota Motor Corp
Original Assignee
Nachi Fujikoshi Corp
Toyota Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nachi Fujikoshi Corp, Toyota Motor Corp filed Critical Nachi Fujikoshi Corp
Priority to JP1985195235U priority Critical patent/JPH06200Y2/en
Publication of JPS62105729U publication Critical patent/JPS62105729U/ja
Application granted granted Critical
Publication of JPH06200Y2 publication Critical patent/JPH06200Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Forging (AREA)

Description

【考案の詳細な説明】 (産業上の利用分野) この考案は、被転造物を挟んで対置され、往復動により
被転造物の外周に歯形を形成するラック形状の転造平ダ
イスに関する。
DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a rack-shaped rolling flat die which is placed opposite to each other with a rolling object interposed therebetween and reciprocates to form a tooth profile on the outer periphery of the rolling object.

(従来の技術) 従来の転造平ダイスは、第4図、第5図および第7図に
示すように、対置された一対の転造平ダイス(1),(2)に
喰付勾配歯部(3)、仕上げ歯部(4)、逃げ歯部(5)を設
け、第8図のように被転造物(6)に歯(G)を形成する
ものであるが、喰付勾配歯部(3)ではピッチライン
(A′−A″)上における各歯の歯厚(7a)は喰付第
1歯(31)から最終歯(3n)に至るまで等しく、さら
に仕上げ歯部(4)の歯厚(7b)とも等しくなってい
る。歯丈は喰付先端部(C)近傍の喰付第1歯(31
において最小とし、以後最終歯に至るまで順次大きくし
て喰付量を増大させると共に、喰付先端部(C)におけ
る歯底高さ1dと仕上げ歯部(4)の歯底高さ1eが同一
であるのが普通である。
(Prior Art) As shown in FIG. 4, FIG. 5 and FIG. 7, a conventional rolling flat die has a pair of rolling flat dies (1) and (2) placed opposite to each other and has a sloping tooth. Part (3), finishing tooth part (4), relief tooth part (5) are provided to form tooth (G) on the workpiece (6) as shown in FIG. In the portion (3), the tooth thickness (7a) of each tooth on the pitch line (A'-A ") is equal from the first tooth (3 1 ) to the final tooth (3 n ) with the bite, and the finishing tooth portion The tooth thickness (7b) of (4) is also the same.The tooth length is the first tooth (3 1 ) with the bite near the biting tip (C).
, And the biting amount is gradually increased until reaching the final tooth, and the root height 1d at the biting tip (C) and the root height 1e of the finishing tooth (4) are the same. Is usually.

さらに、喰付を一層良くするために喰付勾配歯部(3)の
歯厚を仕上歯部に近づくに従って大きくしたもの(実開
昭58−189038号)も考案されている。また、第
1乃至第4の荒加工部分と仕上部分を設けた転造平ダイ
スもあり、かかる転造平ダイスでは第1の荒加工部分で
50%の喰付を行い、以下第4の荒加工部分まで喰付量
を25%、12.5%、10.5%と順次少なくし、仕
上げ部分で2%の喰付量をもたせるために歯と歯底の曲
率を仕上げ部分に向けて小さくしたものがある(特開昭
49−73355号)。
Further, in order to further improve the biting, there has been devised a toothed tooth portion (3) in which the tooth thickness is increased as it approaches the finishing tooth portion (Japanese Utility Model Laid-Open No. 58-189038). Further, there is also a rolled flat die provided with first to fourth rough processed portions and a finish portion. In such a rolled flat die, 50% is eaten in the first rough processed portion, and then the fourth rough The biting amount is reduced to 25%, 12.5%, 10.5% in order until the processed part, and the curvature of the tooth and the root is reduced toward the finishing part to have a 2% biting amount at the finishing part. Some of them have been made (JP-A-49-73355).

(考案が解決しようとする問題点) しかし、上記の第4図乃至第8図に示すものを始め、従
来の転造平ダイスは、なお依然として喰付が充分でない
ため被転造物の転がりが円滑でなくピッチ誤差が出易
い。またこれに起因して被転造部の金属の流れが悪く、
安定したピッチ精度が得られない。
(Problems to be solved by the invention) However, in the conventional flat rolling dies including those shown in FIG. 4 to FIG. 8 described above, since the biting is still insufficient, the rolling object is smoothly rolled. However, pitch error is likely to occur. Moreover, due to this, the flow of metal in the rolled part is bad,
Stable pitch accuracy cannot be obtained.

かかる事実は、例えば第5図、第6図に示すように転造
平ダイス(1),(2)が被転造物(6)に喰付始める前は平ダイ
ス歯の山頂にあたるフラット部(F)のみにて被転造物
(6)が転がされ、ダイス歯の溝底部(L)には転造によ
って盛り上がった被転造物(6)の外径部(61)が接触
せず、隙間(S)が存在することに起因する。このため
平ダイスの移動に対して被転造物(6)に転がり遅れが発
生する。例えば被転造物(6)の半回転分の距離だけダイ
スが移動したとしても、被転造物は半回転に満たない分
しか回転せず、歯の分割が正確になされないことにな
る。さらに転造時における金属の流れも十分でない。こ
のため、第9図に示すように被転造物(6)は被転造物の
ピッチライン(P−P)を中心にフォロアー側(M)と
ドリブン側(N)とで反対方向の金属の流れが生じ先端
に歯形状の歪みが生じる。特に歯の長さの短い平ダイス
では被転造物のピッチ誤差が大きくなるため、ダイス喰
付歯の1歯当たりの喰付量(干渉量)を増やすことがで
きず、ピッチ誤差を矯正するのに十分な喰付歯長さが必
要であった。
Such a fact is, for example, as shown in FIGS. 5 and 6, before the rolled flat dies (1) and (2) start to bite on the rolling object (6), the flat portion (F ) Only
(6) is rolled, and the outer diameter part (61) of the rolled object (6) raised by rolling does not contact the groove bottom part (L) of the die tooth, and there is a gap (S). to cause. For this reason, rolling delay occurs in the rolling object (6) with respect to the movement of the flat die. For example, even if the die moves by a distance corresponding to half a rotation of the rolling object (6), the rolling object rotates only for less than half a rotation, and the teeth are not accurately divided. Furthermore, the flow of metal during rolling is not sufficient. Therefore, as shown in FIG. 9, the object to be rolled (6) flows in opposite directions between the follower side (M) and the driven side (N) around the pitch line (P-P) of the object to be rolled. Occurs, and tooth-shaped distortion occurs at the tip. Especially in a flat die with short tooth length, the pitch error of the rolled object becomes large, so the biting amount (interference amount) per tooth of the die can not be increased, and the pitch error is corrected. It was necessary to have a sufficient bite length.

さらに、上記特開昭49−73355号に記載されたも
のは、第1の荒加工部分では50%の喰付量をもたせて
いるために衝撃が大となり、ダンピング装置を内蔵した
特別の転造盤を用いなければならない。しかも、かかる
衝撃によるダイスの破損を防止するために歯先を円弧に
形成しなければならず、平ダイスの製造も厄介であっ
た。
Further, the one described in JP-A-49-73355 has a large impact because the first roughing portion has a bite amount of 50%, so that special rolling with a built-in damping device is performed. You have to use the board. Moreover, in order to prevent damage to the die due to such impact, the tooth tips have to be formed into arcs, and the manufacture of the flat die has been difficult.

(問題点を解決するための手段) この考案は上記の問題を解決すべくなされた転造平ダイ
スであって、一対のラック状の平ダイス(1),(2)を対称
に配置し、相対的移動に伴って両ダイス間に回転自在に
配置された被転造物(6)に歯車又はその類似形状を転造
加工する転造平ダイスであって、ピッチライン(A′−
A″)に沿って喰付先端部(C)から順次に歯丈を増加
させた歯群からなる喰付勾配歯部(3)と、同一歯丈の歯
群からなる仕上げ歯部(4)と、ピッチラインを後端部
(D)に向けて下降させて、該下降ピッチライン(A−
A′)に沿って仕上げ歯部(4)と同一の歯高の歯群から
なる逃げ歯部(5)とを長手方向に形成したものにおい
て、喰付勾配歯部には喰付先端部下から被転造物の一回
の転造周長の略整数倍の長さにわたる喰付前半歯部(3
a)と、該喰付前半歯部と略同一長さの喰付後半歯部
(3b)とを設けると共に、喰付前半歯部の最終歯から
喰付第1歯(81)の歯底高さ(1f)までのピッチラ
イン上の歯厚は、喰付第1歯(81)から喰付前半歯部
の最終歯(8n)に向けて各歯厚が漸増するようにし、
かつ喰付先端部(C)の歯底高さ(1f)は被転造物の
素材外径面に平ダイスの歯底(L)が確実に接触するよ
うに定めさらに該喰付前半歯部の(3a)の各歯底高さ
は第1歯(81)から最終歯(8n)に向かって被転造
物が転造加工された時に盛り上がった外径面が平ダイス
の歯底(L)に軽く接触するように、該喰付前半歯部
(3a)の各歯底高さを喰付第1歯(81)の歯底高さ
から最終歯(8n)の歯底高さ(1g)にむけて徐々に
低くした歯形状を形成したことを特徴とする転造平ダイ
スとしたものである。
(Means for Solving the Problems) This invention is a rolled flat die for solving the above-mentioned problems, in which a pair of rack-shaped flat dies (1) and (2) are symmetrically arranged, A rolling flat die for rolling a gear or a similar shape to a rolling object (6) rotatably arranged between both dies according to a relative movement, the pitch line (A'-
A "), a toothed gradient tooth portion (3) made up of tooth groups whose tooth length is sequentially increased from the biting tip portion (C), and a finished tooth portion (4) made up of tooth groups having the same tooth length. And the pitch line is lowered toward the rear end portion (D), and the descending pitch line (A-
A ') in which the finishing tooth portion (4) and the relief tooth portion (5) consisting of a tooth group having the same tooth height are formed in the longitudinal direction, and the biting gradient tooth portion is from below the biting tip portion. The front half tooth portion (3
a) and the rear half tooth portion (3b) having substantially the same length as the front half tooth portion, and the bottom teeth of the first tooth (8 1 ) from the last tooth of the front half tooth portion The tooth thickness on the pitch line up to the height (1f) is set so that each tooth thickness gradually increases from the first bite (8 1 ) with the bite toward the final tooth (8n) of the front half tooth part with the bite,
In addition, the tooth bottom height (1f) of the biting tip (C) is determined so that the tooth bottom (L) of the flat die securely contacts the outer diameter surface of the material to be rolled. The root height of (3a) is the root (L) of the flat die whose outer diameter surface rises when the workpiece is rolled from the first tooth (81) to the final tooth (8n). So that each tooth bottom of the front half tooth portion (3a) from the tooth height of the first tooth (8 1 ) to the tooth height of the final tooth (8n) (1 g ), The rolling flat die is characterized by gradually forming a tooth shape.

(作用) 第2図、第3図に示すように、本考案に係る一対の転造
平ダイス(1),(2)を被転造物(6)を挟んで対置させ、矢印
(1a),(2a)方向に相互に移動させると、転造さ
れて盛り上がった被転造物(6)の外周面(61)が平ダ
イスの喰付先端部(C)から始まってダイスの喰付前半
歯部(3a)の各歯(81〜8n)の歯底(L)に連続的
に干渉しながら転造される。このため被転造物には歯溝
部(62)が転造成形されるのみならず、盛り上がった
歯先の外径面(61)も同時に加工される。このため、
被転造物は転造平ダイス(1),(2)の移動に対して遅れを
生ずることなく円滑に転造がなされる。
(Operation) As shown in FIGS. 2 and 3, a pair of rolling flat dies (1), (2) according to the present invention are placed opposite to each other with the rolling object (6) interposed therebetween, and the arrows (1a), When they are moved in the direction (2a), the outer peripheral surface (61) of the rolled and rolled object (6) starts from the biting tip (C) of the flat die and the front half tooth part of the die. Rolled while continuously interfering with the tooth bottom (L) of each tooth (8 1 to 8 n ) of (3a). Therefore, not only the tooth groove portion (62) is roll-formed on the rolling object, but also the outer diameter surface (61) of the raised tooth tip is simultaneously processed. For this reason,
The object to be rolled can be smoothly rolled without delay with respect to the movement of the rolling flat dies (1) and (2).

また、喰付前半歯部(3a)の各歯の歯厚(7)は、喰付
先端部C近傍の第1歯(81)の歯厚T1から最終歯(8
n)の歯厚Tnに向けてピッチライン(A′−A″)上
の各歯厚が漸増しているために、被転造物の歯面が常に
平ダイスの歯面に接触して被転造物(6)が無理なく転造
されて転造部の金属の流れが良く、安定した被転造物の
ピッチ精度が得られる。
Further, the tooth thickness (7) of each tooth of the front half tooth portion (3a) is from the tooth thickness T 1 of the first tooth (8 1 ) near the tip portion C of the biting to the final tooth (8).
Since the tooth thicknesses on the pitch line (A′-A ″) gradually increase toward the tooth thickness T n in (n), the tooth surface of the workpiece is always in contact with the tooth surface of the flat die. The rolled product (6) is reasonably rolled, the metal flow in the rolled part is good, and stable pitch accuracy of the rolled product is obtained.

(実施例) 次に本考案の実施例を図面について説明する。本考案の
特徴を明確にするために第4図に示す従来品からまず説
明する。同図は従来の転造平ダイスの歯形状を示し、喰
付先端部(C)から後端部(D)に向けて喰付勾配歯部
(3)と、仕上げ歯部(4)と、逃げ歯部(5)とに区分され
る。転造平ダイスの底面(10)から高さ(1h)のピッチ
ライン(A′〜A″)上の各歯(31(〜(3n)の歯厚
(7a)は全て同一である。即ち、喰付勾配歯部(3)の
喰付先端部(C)近傍の第1歯(31)の歯厚(7a)
と仕上げ歯部(4)の歯厚(7b)は等しくなっている。
また喰付勾配歯部(3)では該歯部の最終歯(3n)からそ
の第1歯(31)にかけて仕上げ歯部(4)の歯末の丈(3
f)だけ漸次除去されて喰付勾配歯部(3)が形成され
る。喰付先端部(C)のダイス歯底高さ(1d)と仕上
げ歯部(4)のダイス歯底高さ(1e)とは等しく形成さ
れている。逃げ歯部(5)では仕上げ歯部(4)から後端部
(D)に向けてダイス歯底高さが徐々に低くなってお
り、ピッチライン(A′〜A″)上では各々の歯厚は等
しい。
(Example) Next, the Example of this invention is described about drawing. In order to clarify the features of the present invention, the conventional product shown in FIG. 4 will be described first. The same figure shows the tooth profile of a conventional rolled flat die, in which the bite gradient tooth portion is provided from the biting front end (C) to the rear edge (D).
(3), finishing tooth portion (4) and relief tooth portion (5). The tooth thicknesses (7a) of the teeth (3 1 (to (3 n )) on the pitch lines (A ′ to A ″) at the height (1 h) from the bottom surface (10) of the rolled flat die are all the same. That is, the tooth thickness (7a) of the first tooth (3 1 ) near the biting tip (C) of the biting gradient tooth (3)
And the tooth thickness (7b) of the finishing tooth portion (4) is equal.
In addition, in the bite gradient tooth portion (3), from the final tooth (3 n ) to the first tooth (3 1 ) of the tooth portion, the end tooth length (3
Only f) is gradually removed to form the toothed gradient tooth portion (3). The die bottom height (1d) of the biting tip portion (C) and the die bottom height (1e) of the finishing tooth portion (4) are formed to be equal. In the clearance tooth portion (5), the die bottom height gradually decreases from the finishing tooth portion (4) toward the rear end portion (D), and each tooth on the pitch line (A ′ to A ″). The thickness is equal.

これに対し本考案に係る転造平ダイス(1)は、第1図に
示すように仕上げ歯部(4)、逃げ歯部(5)は第4図、第5
図に示す従来品と同一形状であるが、喰付勾配歯部
(3)が喰付先端部(C)側に喰付前半歯部(3a)が
形成されている点に特徴を有するものである。
On the other hand, the rolling flat die (1) according to the present invention has a finishing tooth portion (4) and a relief tooth portion (5) as shown in FIGS.
It has the same shape as the conventional product shown in the figure, but is characterized in that the biting gradient tooth portion (3) has the front half tooth portion (3a) formed on the biting tip (C) side. is there.

前記の喰付勾配歯部(3)の喰付前半歯部(3a)の歯
数は被転造物(6)の1回転当りの転造歯数の整数倍に近
似の数とし、喰付後半歯部(3b)の歯数は喰付前半歯
部の歯数と略同数に設定してある。この為、精度の高い
加工が可能となる。喰付先端部(C)の平ダイス歯底高
さ(1f)は被転造物(6)の素材外径面にダイスの歯底
(L)が確実に接触するように定める。また、喰付前半
歯部(3a)の歯底高さ(1f〜1g)は該喰付前半歯
部の第1歯(81)から最終歯(8n)に向かって被転
造物が転造加工された時に、盛り上がった外径面(6
1)が平ダイスの歯底(L)に軽く接触するように考慮
して干渉量を決定する。
The number of teeth in the front half tooth portion (3a) of the above-mentioned biting tooth portion (3) is set to a number approximate to an integer multiple of the number of rolling teeth per revolution of the workpiece (6), The number of teeth of the tooth portion (3b) is set to be substantially the same as the number of teeth of the front half tooth portion. Therefore, highly accurate processing is possible. The height (1f) of the flat die bottom of the biting tip (C) is determined so that the bottom (L) of the die securely contacts the outer diameter surface of the material to be rolled (6). Further,喰付half teeth tooth bottom height (3a) (1F~1g) is toward the final tooth (8n) from the first tooth (8 1) of the first half toothed該喰the rolling product is rolled When processed, the outer diameter surface (6
The interference amount is determined in consideration of 1) lightly contacting the bottom (L) of the flat die.

このため、平ダイスの歯底高さは喰付先端部(C)おけ
る(1f)から最終歯(8n)の(1g)に向けて徐々
に低くなる。喰付勾配歯部(3)の喰付後半歯部(3b)
と仕上げ歯部(4)の平ダイス歯底高さ(1e)はいずれ
も同一であり、従来品の喰付勾配歯部、仕上げ歯部と同
一構造を有すると共に、この考案に係る喰付前半歯部
(3a)の最終歯(8n)における上記歯底高さ(1
g)よりも低い。
Therefore, the bottom height of the flat die gradually decreases from (1f) in the biting tip (C) toward (1g) of the final tooth (8n). The latter half tooth part (3b) of the biting gradient tooth part (3)
And the flat tooth bottom height (1e) of the finishing tooth portion (4) are the same, and have the same structure as the conventional biting gradient tooth portion and finishing tooth portion, and the first half of the biting according to the present invention. The root height (1) at the final tooth (8n) of the tooth portion (3a)
lower than g).

さらに、喰付前半歯部(3a)では喰付先端部(C)近
傍の第1歯(81)から最終歯(8n)までの各々の歯
は、ピッチライン(A′−A″)上において被転造物
(6)のフォロアー側に相当するダイスの片側歯面(9)(第
1図では左側)とドリブン側に相当する他側歯面(11)が
所定量切除されており、その歯厚が喰付後半歯部(3
b)の歯厚よりも小さく形成されているが、該歯厚(T
1〜Tn)は喰付先端部(C)近傍の第1歯(81)から
最終歯(8n)に向けて漸増するように形成されてい
る。また、喰付前半歯部の最終歯(8n)の歯厚(7)の
寸法(Tn)は、喰付後半歯部(3b)の歯厚及び仕上
げ歯部(4)の歯厚それぞれと等しい。
Further, in the front half tooth portion (3a), each tooth from the first tooth (8 1 ) to the final tooth (8n) in the vicinity of the tip portion (C) of the biting is on the pitch line (A′-A ″). To be rolled
The tooth flank (9) (left side in FIG. 1) of the die corresponding to the follower side of (6) and the tooth flank (11) on the other side corresponding to the driven side are cut off by a predetermined amount, and the tooth thickness is consumed. 2nd tooth part (3
Although it is formed smaller than the tooth thickness of b), the tooth thickness (T
1 to Tn) are formed so as to gradually increase toward the final tooth (8n) from喰付tip (C) a first tooth near (8 1). The dimension (Tn) of the tooth thickness (7) of the last tooth (8n) of the front half tooth portion is equal to the tooth thickness of the latter half tooth portion (3b) and the finish tooth portion (4). .

又、本考案の転造加工状態は第3図に示すように順次被
転造物(6)の肉が盛り上がることによりなされる。喰付
前半歯部(3a)における1歯当たりに変化させる歯厚
の量(Δ)は同一とする。
Further, the rolling process of the present invention is carried out by successively raising the meat of the rolling object (6) as shown in FIG. The amount (Δ) of the tooth thickness changed per tooth in the front half tooth portion (3a) is the same.

さらに、本考案に係る転造平ダイスを用いて、モジュー
ルが1、歯数が23、圧力角が30°、転造幅が30m
m、硬さがHB180、材質がSCR 145の歯車を
転造加工したところ、第1表のようになった。
Further, using the rolling flat die according to the present invention, the module is 1, the number of teeth is 23, the pressure angle is 30 °, and the rolling width is 30 m.
When a gear having m, hardness of HB180, and material of SCR 145 was rolled, it was as shown in Table 1.

さらに、本考案の転造平ダイスを用いて加工を行うと、
ピッチ精度が向上するのでダイス歯は例えば第2表のよ
うに短尺化することが可能となった。
Furthermore, when processing is performed using the rolled flat die of the present invention,
Since the pitch accuracy is improved, the die teeth can be shortened as shown in Table 2, for example.

(効果) 本考案に係る転造平ダイスは上記のような構造を有する
ので、ダイス歯溝底部(L)に被転造物(6)の盛り上が
った外径面(61)が被転造物のダイスの歯底に常に接
触し、被転造物がダイスの移動量に応じて確実に回転し
て被転造物(6)の歯溝のみでなく、歯先にも加工が行わ
れて歯先形状の歪みも除去された。さらに、被転造物の
フォロアー側及びドリブン側に対応するダイス歯両面を
減少させ、かつ該歯厚を喰付前半歯部の最終歯に向けて
漸増させたので、加工中に生ずるアンバランスを補正す
ることができる。従って、被転造物の1ピッチ当たりの
接触長さ率(噛み合い率)が向上し、転造中の金属の流
れが良くなった。また、ピッチ精度が向上するのでダイ
ス歯を短尺化することが出来た。
(Effect) Since the rolling flat die according to the present invention has the structure as described above, the outer diameter surface (61) of the rolled object (6) on the bottom of the die tooth groove (L) is the die of the rolled object. Always contact the root of the workpiece, and the workpiece will rotate reliably according to the amount of movement of the die, and not only the tooth space of the workpiece (6) The distortion was also removed. Furthermore, since both sides of the die tooth corresponding to the follower side and driven side of the rolled object are reduced and the tooth thickness is gradually increased toward the final tooth of the front half tooth portion of the bite, the imbalance generated during machining is corrected. can do. Therefore, the contact length ratio (pitch ratio) per pitch of the rolled object was improved, and the flow of metal during rolling was improved. Further, since the pitch accuracy is improved, the die tooth can be shortened.

【図面の簡単な説明】[Brief description of drawings]

第1図はこの考案の実施例の側面図、第2図はこの考案
の要部に拡大図、第3図はこの考案による被加工物の転
造状態の変化を示す説明図、第4図及び第5図は従来品
の側面図、第6図は同じく要部の拡大図、第7図は転造
平ダイスを用いる一般的な転造方式の概略図、第8図は
第7図の上方を取り除いた同斜視図、第9図は被転造物
の外径面に生ずる歯先形状の歪の概略図である。 1……転造平ダイス 1f……喰付端部における歯底高さ 1g……喰付前半歯部の最終歯の歯底高さ 2……転造平ダイス 3……喰付勾配歯部 3a……喰付前半歯部 3b……喰付後半歯部 3f……仕上げ歯部の歯丈 6……被転造物 61……被転造物の外径面 7……歯厚 7a……ダイスの歯厚 7b……ダイスの歯厚 81〜8n……喰付前半歯部の歯厚 9……喰付前半歯部の片歯面(被転造物のフォロアー
側) 11……喰付前半歯部の片歯面(被転造物のドリブン
側) A′−A″……ピッチライン C……喰付端部 L……ダイスの溝底。
FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is an enlarged view of an essential part of the present invention, and FIG. 3 is an explanatory view showing changes in a rolling state of a work piece according to the present invention, and FIG. FIG. 5 is a side view of a conventional product, FIG. 6 is an enlarged view of the main part of the same, FIG. 7 is a schematic view of a general rolling system using a rolling flat die, and FIG. FIG. 9 is a perspective view with the upper part removed, and FIG. 9 is a schematic diagram of the distortion of the tooth top shape that occurs on the outer diameter surface of the object to be rolled. 1 ... Rolled flat die 1f ...... Root height at biting end 1g ...... Root height of the last tooth of front half tooth part 2 ... Rolled flat die 3 ... Gradient toothed part 3a ... 1st half tooth part with biting 3b ... 2nd tooth part with biting 3f ... Tooth length of finishing tooth part 6 ... Rolled object 61 ... Outer diameter surface of rolled object 7 ... Tooth thickness 7a ... Die Tooth thickness of the die 7b …… Tooth thickness of the die 81 to 8n …… Tooth thickness of the front half tooth portion of the bait 9 …… One tooth surface of the front half tooth portion of the bait (follower side of the rolled object) 11 …… The front half tooth of the bait Partial tooth surface (driven side of the rolled object) A'-A "... Pitch line C ... Eating end L ... Groove bottom of die.

───────────────────────────────────────────────────── フロントページの続き (72)考案者 岩城 啓一 富山県富山市石金20番地 株式会社不二越 内 (72)考案者 炭谷 優 富山県富山市石金20番地 株式会社不二越 内 (72)考案者 大橋 誠二 富山県富山市石金20番地 株式会社不二越 内 (72)考案者 村山 公正 愛知県豊田市トヨタ町1番地 トヨタ自動 車株式会社内 (72)考案者 井川 正治 愛知県豊田市トヨタ町1番地 トヨタ自動 車株式会社内 (72)考案者 佐々木 芳雄 愛知県豊田市トヨタ町1番地 トヨタ自動 車株式会社内 (72)考案者 金子 忍 愛知県豊田市トヨタ町1番地 トヨタ自動 車株式会社内 (56)参考文献 特開 昭49−73355(JP,A) 特開 昭50−36345(JP,A) ─────────────────────────────────────────────────── ─── Continuation of front page (72) Keiichi Iwaki 20 Ishigane, Toyama, Toyama, Toyama Prefecture (72) Inventor Yu Sumiya, 20 Ishigane, Toyama, Toyama, Japan (72) Inventor, 72 Seiji Ohashi 20 Ishigane, Toyama City, Toyama Prefecture Fujikoshi Co., Ltd. (72) Creator: Murayama Kohei, Toyota City, Toyota City, Aichi Prefecture 1 Toyota Motor Co., Ltd. (72) Creator: Shoji Ikawa, Toyota City, Toyota City, Aichi Prefecture Toyota Motor Co., Ltd. (72) Inventor Yoshio Sasaki 1 Toyota-cho, Toyota City, Aichi Prefecture Toyota Motor Co., Ltd. (72) Inventor Kaneko Shinobu 1-cho, Toyota City, Aichi Prefecture Toyota Motor Co., Ltd. (56 ) Reference JP-A-49-73355 (JP, A) JP-A-50-36345 (JP, A)

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】一対のラック状の平ダイス(1),(2)を対称
に配置し、相対的移動に伴って両ダイス間に回転自在に
配置された被転造物(6)に歯車又はその類似形状を転造
加工する転造平ダイスであって、ピッチライン(A′−
A″)に沿って喰付先端部(C)から順次に歯丈を増加
させた歯群からなる喰付勾配歯部(3)と、同一歯丈の歯
群からなる仕上げ歯部(4)と、ピッチラインを後端部
(D)に向けて下降させて、該下降ピッチライン(A−
A′)に沿って同一の歯高の歯群からなる逃げ歯部(5)
とを長手方向に形成したものにおいて、喰付勾配歯部に
は喰付先端部から被転造物の一回の転造周長の略整数倍
の長さにわたる喰付前半歯部(3a)と、該喰付前半歯
部と略同一長さの喰付後半歯部(3b)とを設けると共
に、喰付前半歯部の最終歯から喰付第1歯(81)の歯
底高さ(1f)までのピッチライン上の歯厚は、喰付第
1歯(81)から喰付前半歯部の最終歯(8n)に向け
て各歯厚が漸増するようにし、かつ喰付先端部(C)の
歯底高さ(1f)は被転造物の素材外径面に平ダイスの
歯底(L)が確実に接触するように定めさらに該喰付前
半歯部の(3a)の各歯底高さは第1歯(81)から最
終歯(8n)に向かって被転造物が転造加工された時に
盛り上がった外径面が平ダイスの歯底(L)に軽く接触
するように、該喰付前半歯部(3a)の各歯底高さを喰
付第1歯(81)の歯底高さから最終歯(8n)の歯底
高さ(1g)にむけて徐々に低くした歯形状を形成した
ことを特徴とする転造平ダイス。
1. A pair of rack-shaped flat dies (1), (2) are symmetrically arranged, and a gear or a gear is attached to a rolling object (6) rotatably arranged between the dies according to relative movement. A rolling flat die for rolling a similar shape to a pitch line (A'-
A "), a toothed gradient tooth portion (3) made up of tooth groups whose tooth length is sequentially increased from the biting tip portion (C), and a finished tooth portion (4) made up of tooth groups having the same tooth length. And the pitch line is lowered toward the rear end portion (D), and the descending pitch line (A-
A ') A relief tooth (5) consisting of teeth with the same tooth height
In the longitudinal direction, the biting gradient tooth portion has a front half tooth portion (3a) extending from the biting tip portion to a length that is approximately an integral multiple of the rolling peripheral length of one rolling object. The front half tooth portion and the rear half tooth portion (3b) having substantially the same length are provided, and the root height of the first tooth (8 1 ) from the last tooth of the front half tooth portion (8 1 ) The tooth thickness on the pitch line up to 1f) is such that each tooth thickness gradually increases from the first bite (8 1 ) with bite toward the final tooth (8n) of the front half tooth part with bite, and the tip of the bite The root height (1f) of (C) is determined so that the bottom (L) of the flat die securely contacts the outer diameter surface of the material to be rolled. The root height is such that the outer diameter surface that rises when the workpiece is rolled from the first tooth (81) toward the final tooth (8n) makes light contact with the root (L) of the flat die. To the eater Tooth shape which gradually decreases toward the tooth bottom tooth bottom height of the final tooth from a height (8n) of the first half teeth喰付first tooth each tooth bottom height of (3a) (8 1) ( 1g) Rolled flat die characterized by being formed.
JP1985195235U 1985-12-20 1985-12-20 Rolled flat die Expired - Lifetime JPH06200Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1985195235U JPH06200Y2 (en) 1985-12-20 1985-12-20 Rolled flat die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1985195235U JPH06200Y2 (en) 1985-12-20 1985-12-20 Rolled flat die

Publications (2)

Publication Number Publication Date
JPS62105729U JPS62105729U (en) 1987-07-06
JPH06200Y2 true JPH06200Y2 (en) 1994-01-05

Family

ID=31152940

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1985195235U Expired - Lifetime JPH06200Y2 (en) 1985-12-20 1985-12-20 Rolled flat die

Country Status (1)

Country Link
JP (1) JPH06200Y2 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818736A (en) * 1972-10-10 1974-06-25 Caterpillar Tractor Co Tooth forming machine
JPS5313183B2 (en) * 1973-08-03 1978-05-08

Also Published As

Publication number Publication date
JPS62105729U (en) 1987-07-06

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