JPS58145322A - Flat die for rolling - Google Patents
Flat die for rollingInfo
- Publication number
- JPS58145322A JPS58145322A JP2647882A JP2647882A JPS58145322A JP S58145322 A JPS58145322 A JP S58145322A JP 2647882 A JP2647882 A JP 2647882A JP 2647882 A JP2647882 A JP 2647882A JP S58145322 A JPS58145322 A JP S58145322A
- Authority
- JP
- Japan
- Prior art keywords
- tooth
- tooth group
- group
- escaping
- chamfering
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H5/00—Making gear wheels, racks, spline shafts or worms
- B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls
- B21H5/027—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls by rolling using reciprocating flat dies, e.g. racks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は歯車やスプライン等を転造するために使用する
平ダイスに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flat die used for rolling gears, splines, etc.
周知の平ダイスは、その歯群構成が、第２図に示すよう
に、噴材歯群Ａ、仕上歯群Ｂ、追歯群Ｃよりなる。仕上
歯群Ｂの各歯の歯先からダイス底面３までの距離りは同
一でかつ各歯は全く同一の歯形を有している。一方噴材
歯群Ａおよび追歯群Ｃにおいては、距離Ｌ′Ｊ３よび歯
厚が夫々ダイス両端に近ずくに従って小さくなっている
。ただし、噴材歯群Ａと追歯群Ｃの目的は異っている関
係で、前者の長手方向中は後者のそれよりも長くかつ前
者の各歯先を結ぶ線のダイス底面３に対する勾配は後者
のそれよりも緩やかになっている。The well-known flat die has a tooth group configuration consisting of a blasting material tooth group A, a finishing tooth group B, and an additional tooth group C, as shown in FIG. The distance from the tip of each tooth of the finishing tooth group B to the die bottom surface 3 is the same, and each tooth has exactly the same tooth profile. On the other hand, in the blast material tooth group A and the additional tooth group C, the distance L'J3 and the tooth thickness become smaller as they approach both ends of the die. However, the purposes of the injection tooth group A and the additional tooth group C are different, and the former is longer in the longitudinal direction than the latter, and the slope of the line connecting each tooth tip of the former with respect to the die bottom surface 3 is It is slower than the latter.
上記構造の平ダイスを使用して行う転造は第１図に示す
要領で行なわれる。Rolling using the flat die having the above structure is carried out in the manner shown in FIG.
１）ワークピース２を転造装置の所定位置に回転可に取
り付ける。1) Rotatably attach the workpiece 2 to a predetermined position on the rolling device.
２）ワークピース２を挾んで正反対の位置にセラした１
対の平ダイスｌａ、ｌｂの間隔寸法を調節する。2) Hold workpiece 2 and press it in the exact opposite position 1
Adjust the distance between the pair of flat dies la and lb.
３）１対の平ダイスｌｓｚ、ｌｂを夫々仮想線で示す位
置まで互いに逆方向に直線移動させる。この工程により
ワークピース２の局面に所望の歯形が形成される。3) A pair of flat dies lsz and lb are linearly moved in opposite directions to the positions shown by the imaginary lines. This step forms the desired tooth profile on the surface of the workpiece 2.
４Ｎ造された歯車を転造装置より取り外す。Remove the 4N gear from the rolling device.
５）各平ダイス１ａ、Ｉｂを煮仮想線位置から元の宍線
位置まで戻す。5) Return each flat die 1a, Ib from the imaginary line position to the original position.
ところで、この転造方法においては、歯数の多い歯車や
大型の歯車は精度が悪いという欠点がある。これは、大
型歯車等の場合は平ダイスの噴材歯群の各歯に過度の負
担がかかるためである。精度を向上させる解決策として
、平ダイスの長手方同寸法を伸ばすことが容易に考えら
れるが、この解決策は、転造装置との関係で問題がある
。By the way, this rolling method has the disadvantage that the accuracy is poor for gears with a large number of teeth or large gears. This is because, in the case of large gears, etc., an excessive load is placed on each tooth of the blast material tooth group of the flat die. As a solution to improve precision, it is easy to consider increasing the longitudinal dimension of the flat die, but this solution has problems in relation to the rolling equipment.
即ち、平ダイスを長くすると転造装置自体が大型化し、
設置面積が大きくなると共に装置のコストが高騰する。In other words, if the flat die is made longer, the rolling device itself becomes larger.
As the installation area increases, the cost of the device increases.
そこで本発明者等は、平ダイスの長手方向寸法を伸ばさ
ずして下型歯車等を精度良く転造する方策について研究
したところ、１対のダイスを数回往復動せしめかつ、両
ダイスが往復動死点に至った時点でその都度、両ダイス
間間隔を挾めて行くという着想の下に、この方法を実現
できる平ダイスを発明するに至った。Therefore, the present inventors researched a method for accurately rolling lower die gears, etc. without increasing the longitudinal dimension of the flat die, and found that a pair of dies were made to reciprocate several times, and both dies reciprocated. Based on the idea of increasing the distance between the two dies each time they reach the dead center, they came up with the invention of a flat die that can implement this method.
本発明は、仕上歯群を挾んでその両側に噴材前退歯群を
左右対称に形成してなることを特徴とする転造用平ダイ
スに存する◎
以下に、第３，４図に基いて本発明を具体的に説明する
。The present invention resides in a flat rolling die characterized by sandwiching a group of finishing teeth and forming a group of pre-recessed injection teeth symmetrically on both sides of the group. The present invention will be specifically explained below.
第３図は１つの平ダイスの全体の側面を示している。平
ダイスの上面つまり歯面４に形成した歯群は長手方向に
おいて左右対称に形成している。FIG. 3 shows the entire side view of one flat die. The teeth formed on the upper surface of the flat die, that is, the tooth surface 4, are formed symmetrically in the longitudinal direction.
すなわち、中央に仕上歯群Ｂが位置しその両側に左右対
称の噴材前退歯群ＡＣを夫々形成している。That is, the finished tooth group B is located in the center, and the symmetrical injection material pre-recessed tooth groups AC are formed on both sides of the finished tooth group B, respectively.
上記仕上１群Ｂは、従来の平ダイスの仕上歯群と同様、
噴材前退歯群ＡＣ（従来の平ダイスにおいては噴材歯群
）によってワークピースの周面に荒加工された歯形を所
望の形状に仕上げることを目的としている。したがって
、第４図に示すように、仕上歯群Ｂの各歯５ａ、５ａ・
・・は同一形状で、各歯５ａの歯先から基準面たる平ダ
イス底面３までの距離りは全て等しい。The finishing group 1 B is similar to the finishing teeth group of the conventional flat die,
The purpose of this is to finish the tooth profile roughly machined on the circumferential surface of the workpiece by the injection material pre-recess tooth group AC (the injection material tooth group in conventional flat dies) into a desired shape. Therefore, as shown in FIG. 4, each tooth 5a, 5a,
... have the same shape, and the distances from the tip of each tooth 5a to the flat die bottom surface 3 serving as the reference surface are all equal.
一方、上記各噴材前退歯群ＡＣは、それがワークピース
に対して送り方向に位置するときは噴材歯群として働き
、一方それが逆方向に位置するときは追歯群として働く
ように構成している。したがって、この各歯群ＡＣは噴
材歯群としての機能を与える関係上、第２図の従来例と
比較すれば明らかなように、従来例の追歯群Ｃよりは長
く構成すると共に、各歯先を結ぶ線のダイス底面３に対
する勾配を緩やかに構成している。ただし、従来例の噴
材歯群Ｃの長さよりは短かくなっている。On the other hand, each of the above-mentioned groups of pre-retracted teeth of the blasting material act as a group of teeth of the blasting material when it is located in the feeding direction with respect to the workpiece, and on the other hand, when it is located in the opposite direction, it works as a group of additional teeth. It is composed of Therefore, since each tooth group AC functions as a group of blasting material teeth, it is made longer than the additional tooth group C of the conventional example, as is clear from the comparison with the conventional example shown in FIG. The line connecting the tooth tips has a gentle slope with respect to the die bottom surface 3. However, the length is shorter than the length of the injection material tooth group C of the conventional example.
今、代表的従来例における噴材歯群Ａと仕上歯群Ｂと追
歯群Ｃとの長手方拘長さの比率を４：１．５二〇、５と
し、かつ平ダイスの長手方向長さと仕上歯群の長手方向
長さを変更しないとすれば、本発明に係る平ダイスの一
方の噴材前退歯群ＡＣと仕上歯群Ｂと他方の噴材前退歯
群ＡＣの長さ比率は例えば２．２５：１．５：２．２５
となる。Now, in a typical conventional example, the ratio of the longitudinal restraint lengths of the injection tooth group A, the finishing tooth group B, and the additional tooth group C is 4:1.5, and the longitudinal length of the flat die is 4:1.5. Assuming that the length in the longitudinal direction of the finishing tooth group is not changed, the lengths of one of the pre-recessed teeth group AC of the injection material, the finishing tooth group B, and the other pre-recessed tooth group AC of the injection material of the flat die according to the present invention For example, the ratio is 2.25:1.5:2.25
becomes.
噴材前退歯群ＡＣにおける各歯の歯先からダイス底面３
に対する距離りは、第４図に明らかなように、ダイス端
に向って次第に低くなるように構成している。このよう
に構成することにより噴材歯群としての機能を与えるこ
とができる。しかしこの構成のみでは追歯群としての機
能を与えることはできない。追歯群として機能するため
には、歯先からダイス底面までの距離りがダイス端に向
うに従って次第に低くなるように構成するのみならず、
基準ピッチ線（ダイス底面に対して平行）上の歯厚督が
、ダイス端に向うに従って、仕上歯群Ｂにおける各歯の
歯厚Ｗより次第に小さくなるように構成する必要がある
。このように構成することによって、仕上歯群Ｂによっ
て形成された（塑性変形）ワークピースの歯の急激な弾
性復帰が防止され、ワークピースに所定の歯形状を与え
ることができる。この歯厚Ｗの変化は噴材前退歯群ＡＣ
全長に渡って実施する必要はなく、追歯群として機能さ
せるためには仕上歯群に隣接する一部分に実施すればよ
い。したがって、歯厚Ｗの変化は、追歯群としての機能
を果すに十分な長さ寸法Ｃ（第３図参照）の領域のみに
おいて実施し、残りの長さ寸法Ａの領域においては各歯
の歯厚を同一にしてもよい。Die bottom surface 3 from the tip of each tooth in the injection material pre-recessed teeth group AC
As is clear from FIG. 4, the distance from the die to the die is configured to gradually decrease toward the end of the die. With this configuration, it is possible to provide a function as a group of blasting material teeth. However, this configuration alone cannot provide the function of an additional teeth group. In order to function as an additional tooth group, the distance from the tooth tip to the bottom of the die must not only be configured so that it gradually decreases toward the die end.
It is necessary to configure the tooth thickness on the reference pitch line (parallel to the die bottom surface) to gradually become smaller than the tooth thickness W of each tooth in the finished tooth group B toward the die end. With this configuration, sudden elastic return of the teeth of the workpiece (plastically deformed) formed by the finishing tooth group B can be prevented, and a predetermined tooth shape can be given to the workpiece. This change in tooth thickness W corresponds to the tooth recession group AC before the injection material.
It is not necessary to perform it over the entire length, and it is sufficient to perform it on a portion adjacent to the finished tooth group in order to function as the additional tooth group. Therefore, the tooth thickness W is changed only in the region of length C (see Figure 3) that is sufficient to function as an additional tooth group, and in the remaining region of length A, each tooth is The tooth thickness may be the same.
本発明に係る平ダイスの構成は上記の通りであるから、
ダイスの両端部は、従来例の如く噴材歯群Ａと追歯群Ｃ
とに区別されるということではなく、どちらの機能も兼
ね備えているということになる。したがって、この平ダ
イスを１対用いて第１図の如き転造加工をする場合、各
平ダイスは、往路復路のどちらにおいてもワークピース
に対して転造加工を施こすことが可能となる。Since the configuration of the flat die according to the present invention is as described above,
Both ends of the die have a group of blasting material teeth A and a group of additional teeth C as in the conventional example.
This does not mean that there is a distinction between the two, but rather that it has the functions of both. Therefore, when a pair of flat dies are used to perform rolling as shown in FIG. 1, each flat die can perform rolling on a workpiece in both the forward and backward passes.
したがって、前記したように大型歯車等を転造加工によ
り作る場合には、１対のダイスを数回往復動せしめかつ
両ダイスが往復動死点に至った時点でその都度、両ダイ
ス間間隔を挾めて行き、ワークピースに付与する歯形を
徐々に深めていくという転造方法が可能となる。Therefore, when manufacturing large gears etc. by rolling as described above, a pair of dies is reciprocated several times, and each time when both dies reach the dead center of the reciprocating movement, the distance between the two dies is adjusted. This enables a rolling method in which the tooth profile provided on the workpiece is gradually deepened by sandwiching the workpiece.
上記方法によれば、平ダイスの各歯に過度の負担がかか
ることが防止され、加工精度は飛躍的に向上する。また
、各噴材前退歯群の長さ寸法が従来例に比して短かくな
り、１回移動当りの噴材歯群としての機能は従来例より
劣るとしても、両ダイス間間隔を調整することによって
噴材前退歯群の歯に対する負担本自在に調整できるので
何ら問題はない。According to the above method, excessive load is prevented from being applied to each tooth of the flat die, and processing accuracy is dramatically improved. In addition, the length dimension of each group of pre-recessed teeth of the injection material is shorter than that of the conventional example, and even though the function as a group of teeth of the injection material per movement is inferior to that of the conventional example, the interval between both dies is adjusted. By doing so, the load on the teeth of the pre-recessed tooth group can be adjusted freely, so there is no problem.
さらに、製作すべきものの歯数が少なくかつ小型であっ
て、両ダイスを１回直線移動させるだけで十分精度のよ
いものが転造できる場合には、片路で１つ、したがって
両ダイスの１往復によって２ケのものが製作でき製産効
率が略２倍になる。Furthermore, if the number of teeth to be manufactured is small and the number of teeth is small, and if it is possible to roll with sufficient precision by moving both dies once in a straight line, one By reciprocating, two items can be manufactured, approximately doubling production efficiency.
以上説明したように、本発明に係る平ダイスは仕上歯群
を挾んでその両側に噴材前退歯群を左右対称に形成して
なるので、往復加工が可能となり、したがって精度のよ
い大型歯車等を加工でき所期の目的を達成し得るととも
に、小型歯車等の加工の場合は加工能率を倍化すること
が可能となる。As explained above, since the flat die according to the present invention has a group of finished teeth sandwiched between them and a group of pre-recessed teeth for blasting material formed symmetrically on both sides, it is possible to perform reciprocating machining, thus producing a large gear with high precision. In addition, in the case of machining small gears, it is possible to double the machining efficiency.
第１図は１対の平ダイスを用いて歯車を転造する方法を
示す説明図、第２図は従来の平ダイスを示す説明図、第
３，４図は夫々本発明に係る平ダイスを示す説明図であ
る。
１ａ、１ｂ・・・１対の平ダイス、２・・・ワークピー
ス、３・・・ダイス底面、４・・・ダイス歯面、５ａ・
・・歯、Ｐ・・・基準ピッチ線、Ｌ・・・歯先からダイ
ス底面までの距離、Ｗ、Ｗ・・・歯厚、ＡＣ・・・噴材
前退歯群、Ｂ・・・仕上歯群。Fig. 1 is an explanatory diagram showing a method of rolling a gear using a pair of flat dies, Fig. 2 is an explanatory diagram showing a conventional flat die, and Figs. 3 and 4 are explanatory diagrams showing a method of rolling gears using a pair of flat dies. FIG. 1a, 1b... A pair of flat dies, 2... Work piece, 3... Die bottom surface, 4... Die tooth surface, 5a...
...Tooth, P...Reference pitch line, L...Distance from the tooth tip to the bottom of the die, W, W...Tooth thickness, AC...Pre-recessed teeth group of blasting material, B...Finish group of teeth.
Claims (1)
対称に形成してなることを特徴とする転造用平ダイス。(1) A flat rolling die characterized by sandwiching a finishing tooth group and symmetrically forming a blasting material/relief tooth group on both sides thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2647882A JPS58145322A (en) | 1982-02-20 | 1982-02-20 | Flat die for rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2647882A JPS58145322A (en) | 1982-02-20 | 1982-02-20 | Flat die for rolling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58145322A true JPS58145322A (en) | 1983-08-30 |
| JPS6411382B2 JPS6411382B2 (en) | 1989-02-23 |
Family
ID=12194603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2647882A Granted JPS58145322A (en) | 1982-02-20 | 1982-02-20 | Flat die for rolling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58145322A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012115862A (en) * | 2010-11-30 | 2012-06-21 | Union Tool Co | Form rolling die |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5036346A (en) * | 1973-06-22 | 1975-04-05 |
-
1982
- 1982-02-20 JP JP2647882A patent/JPS58145322A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5036346A (en) * | 1973-06-22 | 1975-04-05 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012115862A (en) * | 2010-11-30 | 2012-06-21 | Union Tool Co | Form rolling die |
| CN102658345A (en) * | 2010-11-30 | 2012-09-12 | 佑能工具株式会社 | Form rolling die |
| KR101330467B1 (en) * | 2010-11-30 | 2013-11-15 | 유니온쓰루 가부시키가이샤 | Form rolling die |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6411382B2 (en) | 1989-02-23 |
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