JPH0639478A - Producing mechanism for lovrd joint @(3754/24)cross groove universal joint) outer ring - Google Patents

Producing mechanism for lovrd joint @(3754/24)cross groove universal joint) outer ring

Info

Publication number
JPH0639478A
JPH0639478A JP21968392A JP21968392A JPH0639478A JP H0639478 A JPH0639478 A JP H0639478A JP 21968392 A JP21968392 A JP 21968392A JP 21968392 A JP21968392 A JP 21968392A JP H0639478 A JPH0639478 A JP H0639478A
Authority
JP
Japan
Prior art keywords
protrusion
split die
outer ring
die
cross groove
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
Application number
JP21968392A
Other languages
Japanese (ja)
Inventor
Yoshibumi Ito
義文 伊藤
Norio Ito
則雄 伊藤
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.)
Toyota Motor Corp
Original Assignee
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP21968392A priority Critical patent/JPH0639478A/en
Publication of JPH0639478A publication Critical patent/JPH0639478A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D3/229Prismatic coupling parts having each groove centre-line lying on planes parallel to the axis of the respective coupling part
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2250/00Manufacturing; Assembly

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

PURPOSE:To prevent the crack and the breakage of a die and to promote a fill-up around a cross groove. CONSTITUTION:In base plates 60a diagonally forming projection lines 60b for forming the cross grooves, the projection parts 61 are arranged on the diagonal line in the direction crossed to this projecting lines 60b, or in the neighborhood thereof. Both side surfaces 60c, 60d of the base plate part 60a are formed as the tapered surface. Bending moment toward the outer part in the radius direction to the base plate part 60a developed through this tapered surfaces at the time of forming is cancelled by bringing the projecting parts 61 into contact with the inner surface of a preformed material 4 and receiving the load from the outer part. Therefore, as excess bending is not acted to the base plate part 60a, the crack and the breakage of the divided die 60 are prevented.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、等速ジョイントの一
種であるレブロジョイントにおける外輪を製造するため
の機構に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for manufacturing an outer ring of a rebro joint which is a kind of constant velocity joint.

【0002】[0002]

【従来の技術】先ずこの発明で対象とするレブロジョイ
ントの外輪の形状の一例について説明すると、これは、
軸部の一端部に中空状のカップ部を有し、そのカップ部
の内面に複数のクロス溝を形成したものである。このク
ロス溝は、カップ部の内面に対し螺旋方向に向けて形成
され、かつ隣り合うクロス溝の方向が互いに反対方向と
なっている。この種の外輪の一例を図8および図9に示
してあり、これらの図中符号1は軸部を示し、また符号
2はカップ部を示し、さらに符号3はクロス溝を示して
いる。
2. Description of the Related Art First, an example of the shape of the outer ring of a rebro joint to which the present invention is applied will be described.
A hollow cup portion is provided at one end of the shaft portion, and a plurality of cross grooves are formed on the inner surface of the cup portion. The cross grooves are formed in the spiral direction with respect to the inner surface of the cup portion, and the directions of the adjacent cross grooves are opposite to each other. An example of this type of outer ring is shown in FIGS. 8 and 9, in which reference numeral 1 indicates a shaft portion, reference numeral 2 indicates a cup portion, and reference numeral 3 indicates a cross groove.

【0003】このレブロジョイント外輪のカップ部2を
形成する方法として、生産性や材料歩留りを向上させる
ために、鍛造法が従来採用されており、その方法の一例
を図10を参照して説明すると、以下のとおりである。
As a method of forming the cup portion 2 of the rebro joint outer ring, a forging method has been conventionally adopted in order to improve productivity and material yield. An example of the method will be described with reference to FIG. , As follows:

【0004】すなわち図10は、本出願人が特願平3−
283854号で提案した装置を概略的に示す断面図で
あって、粗形材4の内部にマンドレルポンチ5が挿入さ
れており、このマンドレルポンチ5は、前記クロス溝3
を形成するための突条を設けた複数の分割ダイス6を、
ホルダー7の外周部に一定間隔に保持したものである。
また粗形材4の外周側には、粗形材4の半径方向に前後
動する複数のラジアルダイ8が配置され、それらのラジ
アルダイ8と反力受け部9との間にくさび部材10が挿
入されている。したがってくさび部材10をラジアルダ
イ8と反力受け部9との間に押し込むことにより、ラジ
アルダイ8が粗形材4を分割ダイス6に向けて加圧し、
その結果、粗形材4がマンドレルポンチ5に沿って塑性
変形させられて、所期の形状のレブロジョイント外輪が
得られる。
That is, in FIG. 10, the applicant of the present invention filed Japanese Patent Application No. 3-
FIG. 2 is a cross-sectional view schematically showing the device proposed in No. 283854, in which a mandrel punch 5 is inserted inside a rough material 4, and the mandrel punch 5 is provided with the cross groove 3;
A plurality of split dies 6 provided with ridges for forming
The holder 7 is held on the outer peripheral portion at a constant interval.
A plurality of radial dies 8 that move back and forth in the radial direction of the rough material 4 are arranged on the outer peripheral side of the rough material 4, and a wedge member 10 is provided between the radial dies 8 and the reaction force receiving portion 9. Has been inserted. Therefore, by pushing the wedge member 10 between the radial die 8 and the reaction force receiving portion 9, the radial die 8 presses the rough material 4 toward the split die 6,
As a result, the rough material 4 is plastically deformed along the mandrel punch 5, and the outer ring of the rebro joint having the desired shape is obtained.

【0005】上記の分割ダイス6には、大きな荷重が作
用するうえに、その位置決め精度および寸法精度が、ク
ロス溝3の精度に大きく影響する。そのため従来では、
分割ダイス6は,図11に示すように、矩形断面の基板
部6aの表面に、その対角線とほぼ平行な方向に沿って
突条6bを形成し、さらに基板部6aの両側面6c,6
dをテーパ面として位置決め精度を良好にしている。な
お、符号6eは研削逃げ代形成用の膨大部である。
A large load acts on the split die 6, and its positioning accuracy and dimensional accuracy greatly influence the accuracy of the cross groove 3. Therefore, in the past,
As shown in FIG. 11, the split die 6 has a ridge 6b formed on a surface of a substrate 6a having a rectangular cross section along a direction substantially parallel to a diagonal line of the substrate 6a.
The positioning accuracy is improved by using d as a tapered surface. Note that reference numeral 6e is an enlarged portion for forming a grinding clearance.

【0006】[0006]

【発明が解決しようとする課題】上述したレブロジョイ
ント外輪のクロス溝3は、その螺旋方向(傾斜方向)が
交互に反対となっているから、クロス溝3同士の間隔、
すなわち突条6b同士の間隔は、カップ部2の開口部お
よび底部のそれぞれにおいて大小に交互に変化してい
る。したがって図12に成形過程を示すように、突条6
bの間隔が狭い箇所(以下、仮に小ピッチ部とする)1
1には、突条6bの間隔の広い箇所(以下、仮に大ピッ
チ部とする)12よりも先に材料が流入して充填される
(フィルアップする)。粗形材4に対する加圧は、これ
以後も継続されるから、小ピッチ部11の圧力は、大ピ
ッチ部12における圧力よりも更に高くなる。したがっ
て各分割ダイス6には、大ピッチ部12に向けて押す外
力が突条6bを介して作用し、その外力の方向はカップ
部2の開口端側と底部側とでは反対方向になるので、結
局、分割ダイス6にはこれを捩る方向に力が作用するこ
とになる。このような突条6bを挟んだ両側での圧力の
差は、前記膨大部6eを形成してあれば更に大きくな
る。
Since the spiral grooves (inclination directions) of the cross grooves 3 of the above-mentioned REBRO joint outer ring are alternately opposite to each other, the intervals between the cross grooves 3,
That is, the interval between the protrusions 6b is alternately changed between large and small in the opening and the bottom of the cup portion 2. Therefore, as shown in FIG.
Locations where b is narrow (hereinafter referred to as a small pitch portion) 1
The material 1 flows into and fills (fills up) 1 before a portion (hereinafter, temporarily referred to as a large pitch portion) 12 having a wide interval between the protrusions 6b. Since the pressure applied to the rough material 4 is continued thereafter, the pressure in the small pitch portion 11 becomes higher than the pressure in the large pitch portion 12. Therefore, an external force that pushes toward the large pitch portion 12 acts on each split die 6 via the ridge 6b, and the direction of the external force is opposite between the opening end side and the bottom side of the cup portion 2, After all, a force acts on the split die 6 in the direction of twisting it. The pressure difference between both sides of the protrusion 6b is further increased if the enlarged portion 6e is formed.

【0007】一方、この外力に対する反力は、基板部6
aの側面6c,6dを介してホルダー7から作用するこ
とになる。その場合、基板部6aの側面6c,6dは、
前述したように、位置決めのためにテーパ状としてある
から、前記反力に基づく半径方向外方に向けた分力(図
12に矢印Yで示してある)が発生する。その結果、成
形過程において分割ダイス6の基板部6aのうち大ピッ
チ部12側に延びている部分には、これを半径方向で外
側に押し曲げるトルクが作用し、これが原因となって突
条6bと基板部6aとの境界部分に亀裂が入ってしま
い、あるいは分割ダイス6が破損してしまう問題があっ
た。
On the other hand, the reaction force against this external force is
It acts from the holder 7 via the side surfaces 6c and 6d of a. In that case, the side surfaces 6c and 6d of the substrate portion 6a are
As described above, since it is tapered for positioning, a component force (indicated by arrow Y in FIG. 12) outward in the radial direction based on the reaction force is generated. As a result, in the molding process, a torque that pushes the base portion 6a of the split die 6 toward the large pitch portion 12 side in the radial direction acts on the portion extending toward the large pitch portion 12, and this causes the ridge 6b. There is a problem that a crack is formed at the boundary between the substrate portion 6a and the substrate portion 6a or the split die 6 is damaged.

【0008】また前述したように、大ピッチ部12への
材料の充填(フィルアップ)が遅れるため、小ピッチ部
11へのフィルアップがほぼ完了して成形抵抗が増大し
た後も、更に形成荷重を加える必要があるので、容量の
大きいプレス機を使用しなければならない不都合があっ
た。さらに大ピッチ部12側のクロス溝稜線部のフィル
アップが不充分となるために、形状を整えるための余分
な切削代が多くなり、その結果、工数の増大や材料歩留
りの悪化などの問題があった。
As described above, since the filling (fill-up) of the material into the large pitch portion 12 is delayed, the forming load is further increased even after the filling up to the small pitch portion 11 is almost completed and the molding resistance is increased. Therefore, there is a disadvantage that a press machine having a large capacity has to be used. Furthermore, since the fill up of the ridge line portion of the cross groove on the side of the large pitch portion 12 is insufficient, an extra cutting allowance for adjusting the shape is increased, and as a result, there are problems such as an increase in man-hours and a deterioration in material yield. there were.

【0009】この発明は、上記の事情に鑑みてなされた
もので、クロス溝の成形性の良好なレブロジョイント外
輪の製造機構を提供することを目的とするものである。
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a manufacturing mechanism of a rebro joint outer ring having a good cross groove formability.

【0010】[0010]

【課題を解決するための手段】この発明は、上記の目的
を達成するために、筒状の中空部の内側に、その中空部
の内周面に対して螺旋方向を向いたクロス溝を形成する
突条を設けた複数の分割ダイスを、それらの突条の螺旋
方向が交互に反対となるよう一定間隔に等配し、その分
割ダイスに向けた前記中空部を外周側から押圧して塑性
変形を生じさせるレブロジョイント外輪の製造機構にお
いて、前記分割ダイスが、前記中空部を外周側から押圧
する荷重を受ける両側面をテーパ面とした矩形断面の基
板部に、前記突条をそのひとつの対角線方向に斜めに形
成した構造であり、かつ基板部の前記突条を設けた面の
うち、前記突条と交差する方向の他の対角線の近傍の所
定箇所もしくは該所定箇所と対向する前記中空部の内面
所定箇所の少なくともいずれか一方に突起部が形成され
ていることを特徴とするものである。
In order to achieve the above-mentioned object, the present invention forms a cross groove in the inner side of a cylindrical hollow portion in a spiral direction with respect to the inner peripheral surface of the hollow portion. A plurality of divided dies provided with protruding ridges are evenly arranged at regular intervals so that the spiral directions of the ridges are alternately opposite, and the hollow portion toward the divided dies is pressed from the outer peripheral side to achieve plasticity. In a manufacturing mechanism of a Reblo joint outer ring that causes deformation, the split die is provided with one of the protrusions on a rectangular cross-section substrate part having tapered surfaces on both sides receiving a load pressing the hollow part from the outer peripheral side. The structure is formed diagonally in a diagonal direction, and on the surface of the substrate portion on which the ridge is provided, a predetermined location near another diagonal in a direction intersecting with the ridge or the hollow facing the predetermined location. The inner surface of the part has few predetermined places Also characterized in that the protrusions are formed in one.

【0011】[0011]

【作用】この発明における分割ダイスは、突条によって
形成すべきクロス溝の螺旋方向が交互に反対向きとなる
よう粗形材の内側に配置され、その分割ダイスに向けて
粗形材の外周側から荷重が加えられて粗形材に塑性変形
を生じさせる。その分割ダイスは、矩形断面の基板部
に、その対角線方向に沿って斜めに突条を形成したもの
であるから、いわゆる大ピッチ部側に大きく延びた部分
が、突条の各端部側に形成されている。またこの分割ダ
イスはその両側面のテーパ面で保持される。したがって
突条を挟んだ両側での材料のフィルアップの相違に起因
して分割ダイスには、横方向すなわち粗形材の中空部の
円周方向に向けた荷重がかかり、これに対する反力がテ
ーパ面である側面に作用し、その結果、分割ダイスの基
板部のうち大ピッチ部側に延びた部分に曲げモーメント
がかかる。しかしながらこの大ピッチ部側に延びた部分
もしくはこれに対向する中空部の内面所定箇所に突起部
を形成してあるから、この突起部を介して基板部と粗形
材とが接触することにより、成形荷重が前記曲げモーメ
ントを相殺する方向に作用する。したがってこの発明で
は、分割ダイスの亀裂や破損を防止することができる。
The split die according to the present invention is arranged inside the rough shaped material so that the spiral directions of the cross grooves to be formed by the protrusions are alternately opposite to each other, and the outer circumferential side of the rough shaped material is directed toward the split die. A load is applied to the rough shape material to cause plastic deformation. The split die has a rectangular cross-section substrate portion formed with protrusions diagonally along the diagonal direction thereof, so that a portion that greatly extends toward the so-called large pitch portion is located on each end side of the protrusions. Has been formed. Further, this split die is held by the tapered surfaces on both sides thereof. Therefore, due to the difference in material fill-up on both sides of the ridge, a load is applied to the split die in the lateral direction, that is, in the circumferential direction of the hollow part of the rough material, and the reaction force against this is tapered. It acts on the side surface, which is a surface, and as a result, a bending moment is applied to the portion of the substrate portion of the split die that extends toward the large pitch portion side. However, since a protrusion is formed at a predetermined position on the inner surface of the hollow portion facing this portion or the portion extending toward the large pitch portion, by contacting the substrate portion and the rough shape member through this protrusion portion, The forming load acts in a direction to cancel the bending moment. Therefore, according to the present invention, it is possible to prevent the split die from cracking or breaking.

【0012】また前記突起部を分割ダイスの基板部に形
成した場合には、いわゆる大ピッチ部側での突条の周囲
に対する材料の流れをその突起部が促進するので、いわ
ゆる大ピッチ部側における突条の周囲への材料のフィル
アップが良好となる。
Further, when the protrusion is formed on the substrate portion of the split die, the protrusion accelerates the flow of material to the periphery of the protrusion on the so-called large pitch side. Good material fill up around the ridges.

【0013】[0013]

【実施例】つぎにこの発明の実施例を図面を参照して説
明する。なお、以下の実施例の説明において、図8ない
し図12に示す従来例と同一の部分には、図に同一の符
号を付してその説明を省略する。
Embodiments of the present invention will now be described with reference to the drawings. In the following description of the embodiments, the same parts as those of the conventional example shown in FIGS. 8 to 12 are designated by the same reference numerals and the description thereof will be omitted.

【0014】図1は、この発明の一実施例による成形過
程を示す図であって、ここで対象とするレブロジョイン
ト外輪は、図8および図9に示す形状をなすものであ
る。ここで用いられている分割ダイス60は、基本的に
は従来のものと近似した構造であり、図2に示すよう
に、両側面60c,60dをテーパ面とした矩形断面の
基板部60aに、そのひとつの対角線方向に斜めに向け
て突条60bが形成されている。また基板部60aのう
ち、突条60bと交差する方向の対向線上、特にその両
端部付近に、突起部61が形成されている。なお、符号
60eは、クロス溝に研削加工逃げ代を形成するための
膨大部である。
FIG. 1 is a view showing a molding process according to an embodiment of the present invention, in which a Rebro joint outer ring which is an object of the present invention has a shape shown in FIGS. 8 and 9. The split die 60 used here basically has a structure similar to that of the conventional one, and as shown in FIG. 2, a substrate section 60a having a rectangular cross section with both side surfaces 60c and 60d as tapered surfaces, A ridge 60b is formed diagonally in one of the diagonal directions. Further, in the substrate portion 60a, the protrusion portion 61 is formed on the opposing line in the direction intersecting with the protrusion 60b, particularly near both ends thereof. The reference numeral 60e is an enlarged portion for forming a clearance for the grinding process in the cross groove.

【0015】この実施例においても、各分割ダイス60
は、その両側面で位置決めされた状態でホルダー7の外
周部に一定間隔で保持され、その状態でカップ部2の内
周側に配置される。なおこの配置状態において、隣り合
う分割ダイス60の突条60bは、カップ部2の螺旋方
向において互いに反対向きとなっている。そして粗形材
4の外周側からラジアルダイ8を押し付けることにより
カップ部2に塑性変形を生じさせて成形を行う。その場
合、突条60b同士の間隔が狭い小ピッチ部11におけ
るフィルアップが先行し、突条60b同士の間隔が広い
大ピッチ部12におけるフィルアップが遅れる。その結
果、突条60bを挟んだ両側での圧力の差によって分割
ダイス60には大ピッチ部12側への荷重が作用する。
この荷重に対する反力が、テーパ面である側面を介して
作用するから、基板部60aのうち大ピッチ部12側へ
延び出た部分には、テーパ面を介して半径方向で外側に
向けて作用する分力が、曲げモーメントとなって働く。
Also in this embodiment, each split die 60 is used.
Are held on the outer peripheral portion of the holder 7 at regular intervals while being positioned on both side surfaces thereof, and are arranged on the inner peripheral side of the cup portion 2 in this state. In this arrangement, the protrusions 60b of the adjacent split dies 60 are opposite to each other in the spiral direction of the cup portion 2. Then, the radial die 8 is pressed from the outer peripheral side of the rough material 4 to cause the cup portion 2 to be plastically deformed and to be molded. In that case, the fill-up in the small pitch portion 11 where the interval between the protrusions 60b is narrow precedes, and the fill-up in the large pitch portion 12 where the interval between the protrusions 60b is wide is delayed. As a result, the load on the large pitch portion 12 side acts on the split die 60 due to the difference in pressure on both sides of the protrusion 60b.
Since the reaction force against this load acts via the side surface which is the tapered surface, the portion of the substrate portion 60a extending toward the large pitch portion 12 acts outward in the radial direction via the tapered surface. The component force that acts acts as a bending moment.

【0016】一方、この基板部60aのうち大ピッチ部
12側へ延び出た部分には突起部61が形成されている
ので、成形の開始と同時に、あるいは成形がある程度進
行した時点で、この突起部61が粗形材4の内面に接触
する。この粗形材4はラジアルダイ8によって中心方向
に向けて押圧されているから、この粗形材4の内面に突
起部61が接触することにより、基板部60aのうち大
ピッチ部12側に延び出た部分を、中心部に向けて押す
ことになり、その結果、前記の曲げモーメントが相殺さ
れる。この状態は、カップ部2の成形が終了するまで継
続するから、結局、基板部60aには、従来生じていた
ような過大な曲げモーメントが作用しないので、その亀
裂や破損が防止される。
On the other hand, since the protrusion 61 is formed on the portion of the substrate portion 60a extending toward the large pitch portion 12, the protrusion is formed at the same time when the molding is started or when the molding is advanced to some extent. The portion 61 contacts the inner surface of the rough shape member 4. Since the rough material 4 is pressed toward the center by the radial die 8, the protrusion 61 comes into contact with the inner surface of the rough material 4 to extend toward the large pitch portion 12 side of the substrate portion 60a. The protruding part is pushed toward the center part, so that the bending moment is canceled out. Since this state continues until the molding of the cup portion 2 is completed, an excessive bending moment that has been conventionally generated does not act on the substrate portion 60a, so that cracking or damage is prevented.

【0017】なお、前述した曲げモーメントは、突条6
0bを挟んだ両側でのフィルアップの差に起因し、した
がって突条60bに前記膨大部60eを形成してあれ
ば、フィルアップの差および曲げモーメントが顕著にな
るから、前記突起部61は、膨大部60eと同一の端部
側にのみ設けてもよい。
The bending moment described above is caused by the protrusion 6
0b is caused by the difference in the fill-up on both sides. Therefore, if the protrusion 60b is formed with the enlarged portion 60e, the difference in the fill-up and the bending moment become remarkable. It may be provided only on the same end side as the enlarged portion 60e.

【0018】また上記の説明から明らかなように、突起
部61は、突条60bを挟んだ両側でのフィルアップの
差およびそれに起因する圧力差が過大になる以前に、基
板部60aの端部とカップ部2の内面とを接触させるた
めのものである。したがってこの突起部61は、分割ダ
イス60の基板部60a以外に、例えば図3に示すよう
に、カップ部2の内周面のうち、図2に示す突起部61
と対向する部分に形成してもよい。
Further, as is apparent from the above description, the protrusion 61 has the end portion of the substrate portion 60a before the difference between the fill-ups on both sides of the protrusion 60b and the pressure difference resulting therefrom become excessive. And the inner surface of the cup portion 2 are brought into contact with each other. Therefore, as shown in FIG. 3, for example, as shown in FIG. 3, the protrusion 61 is provided on the inner peripheral surface of the cup portion 2 in addition to the substrate portion 60a of the split die 60.
You may form in the part facing.

【0019】なお、突起部61の形状は、基板部60a
あるいはカップ部内面のいずれに設ける場合であっても
多角形、円形、三角形あるいは球形等の任意の形状で良
く、その具体例を示せば、図4の(A)に示すように、
一辺Lが2〜8mmの正方形で突出高さHが0.1〜3
mmの薄板状、あるいは図4の(B)に示すように、直
径Lが2〜8mmで突出高さHが0.3〜3mmの円板
薄板状とすることができる。
The shape of the protrusion 61 is the substrate portion 60a.
Alternatively, it may be provided in any shape such as a polygon, a circle, a triangle, or a sphere even if it is provided on any of the inner surfaces of the cup portion. If a specific example is shown, as shown in FIG.
Square with a side L of 2 to 8 mm and a protrusion height H of 0.1 to 3
A thin plate having a diameter of 2 to 8 mm and a protruding height H of 0.3 to 3 mm can be used as a thin plate having a diameter of 2 mm as shown in FIG.

【0020】つぎにこの発明の他の実施例を説明する。
図5はこの発明の他の実施例で使用される分割ダイス6
0を示す図であって、ここに示す分割ダイス60にあっ
ては、図2に示す突起部61に替えて、より大きい突起
部62が形成されている。すなわち、基板部60aのう
ち大ピッチ部12側へ延び出す部分には、突条60bと
平行となるよう、台形断面の突起部62が突条60bと
の間に一定間隔あけて形成されている。
Next, another embodiment of the present invention will be described.
FIG. 5 shows a split die 6 used in another embodiment of the present invention.
In the split die 60 shown here, a larger protrusion 62 is formed instead of the protrusion 61 shown in FIG. That is, a protrusion 62 having a trapezoidal cross section is formed at a portion of the substrate portion 60a extending to the large pitch portion 12 side so as to be parallel to the protrusion 60b with a constant interval between the protrusion 62 and the protrusion 60b. .

【0021】また図6はこの発明の更に他の実施例で使
用される分割ダイス60を示す図であって、ここに示す
分割ダイス60は、図5に示す分割ダイス60における
突起部62の立ち上り面を平坦な斜面から円弧面に変え
たものである。
FIG. 6 is a view showing a split die 60 used in still another embodiment of the present invention, in which the split die 60 shown in FIG. The surface is changed from a flat slope to an arc surface.

【0022】この図5に示す分割ダイス60あるいは図
6に示す分割ダイス60を使用した成形状態を図7に模
式的に示してある。このような分割ダイス60において
も、突起部62が成形開始当初から、あるいは成形開始
後の比較的早い時点で粗形材4の内面に接触するので、
基板部60aのうち大ピッチ部12側に延び出している
部分に対する曲げモーメントが生じなくなり、したがっ
て前述した実施例におけると同様に、分割ダイス60の
亀裂や破損を防止することができる。
FIG. 7 schematically shows a molding state using the split die 60 shown in FIG. 5 or the split die 60 shown in FIG. In such a split die 60 as well, since the protrusions 62 come into contact with the inner surface of the rough shaped member 4 from the beginning of molding or at a relatively early time after the start of molding,
A bending moment is not generated in the portion of the substrate portion 60a extending to the large pitch portion 12 side, so that the split die 60 can be prevented from cracking or breaking as in the above-described embodiment.

【0023】またこれら図5に示す分割ダイス60や図
6に示す分割ダイス60にあっては、その突起部62
が、材料の流れの一部を図7に矢印Zで示すように、突
条60bとの間に導くので、突条60bの大ピッチ部1
2側へのフィルアップが促進される。その結果、クロス
溝3の稜線部Aが所期どおりの形状に形成される。この
ような大ピッチ部12側での材料の流れは、成形開始後
の比較的早い時期、すなわち小ピッチ部11側での材料
のフィルアップと並行して生じるので、大きい成形荷重
を要さずに大ピッチ部12側でのフィルアップを生じさ
せることができる。
The split die 60 shown in FIG. 5 and the split die 60 shown in FIG.
However, since a part of the material flow is guided between the ridge 60b and the ridge 60b, as shown by the arrow Z in FIG.
Fill up to the 2nd side is promoted. As a result, the ridge line portion A of the cross groove 3 is formed in a desired shape. Since such a material flow on the large pitch portion 12 side occurs relatively early after the start of molding, that is, in parallel with the material fill-up on the small pitch portion 11 side, a large molding load is not required. It is possible to cause fill-up on the large pitch portion 12 side.

【0024】なお、この大ピッチ部12側への材料の流
れを生じさせる突起部の形状は、図5あるいは図6に示
す形状以外に種々可能である。
The shape of the protrusion that causes the material to flow toward the large pitch portion 12 may be various other than the shape shown in FIG. 5 or 6.

【0025】[0025]

【発明の効果】以上説明したようにこの発明によれば、
クロス溝成形用の突条を挟んだ両側での材料のフィルア
ップに起因する分割ダイスに対する曲げモーメントを、
分割ダイスもしくは粗形材の一方に形成した突起部が他
方に接触することにより、成形荷重によって相殺するよ
うにしたから、分割ダイスの亀裂や破損を未然に防止し
て型寿命の向上を図り、ひいては部品コストを下げるこ
とができる。また分割ダイスの基板部を薄くできるの
で、型コストを下げることができ、さらに成形時の分割
ダイスの変形が生じないから、クロス溝の傾き角度やピ
ッチの精度を向上させることができる。
As described above, according to the present invention,
The bending moment for the split dies due to the material fill-up on both sides sandwiching the ridge for cross groove forming,
Since the projection formed on one of the split die or the rough shape member is brought into contact with the other so as to be offset by the molding load, cracks and breakage of the split die are prevented in advance to improve the mold life, As a result, the cost of parts can be reduced. Further, since the substrate portion of the split die can be thinned, the die cost can be reduced, and further, since the split die is not deformed at the time of molding, the accuracy of the inclination angle and pitch of the cross groove can be improved.

【0026】また突起部を分割ダイスの基板部に形成す
れば、突条の周囲に向けて材料の流れを導くことができ
るので、突条の周囲へのフィルアップ性を向上させてク
ロス溝の稜線形状を明確にし、ひいては後加工を省略も
しくは削減することができ、それに伴い材料歩留りの向
上を図ることができる。そしてまた成形荷重が小さくて
よいから、プレス機を低容量化できる。
If the protrusion is formed on the substrate of the split die, the flow of the material can be guided toward the periphery of the ridge, so that the fill-up property to the periphery of the ridge is improved and the cross groove is formed. It is possible to clarify the shape of the ridge and, by extension, omit or reduce post-processing, and accordingly improve the material yield. Further, since the molding load may be small, the capacity of the press machine can be reduced.

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

【図1】この発明の一実施例による成形過程を示す部分
図である。
FIG. 1 is a partial view showing a molding process according to an embodiment of the present invention.

【図2】その分割ダイスの一つを示す斜視図である。FIG. 2 is a perspective view showing one of the split dies.

【図3】その粗形材の一例を示す断面図である。FIG. 3 is a cross-sectional view showing an example of the rough material.

【図4】突起の形状の例を示す斜視図である。FIG. 4 is a perspective view showing an example of the shape of a protrusion.

【図5】分割ダイスの他の例を示す斜視図である。FIG. 5 is a perspective view showing another example of the split die.

【図6】分割ダイスの更に他の例を示す斜視図である。FIG. 6 is a perspective view showing still another example of the split die.

【図7】図6に示す分割ダイスを使用して成形を行って
いる状態の部分図である。
FIG. 7 is a partial view showing a state where molding is performed using the split die shown in FIG.

【図8】レブロジョイント外輪の平面図である。FIG. 8 is a plan view of a rebro joint outer ring.

【図9】レブロジョイント外輪の断面図である。FIG. 9 is a cross-sectional view of a rebro joint outer ring.

【図10】本出願人が既に提案した製造装置の一例を示
す部分断面図である。
FIG. 10 is a partial cross-sectional view showing an example of a manufacturing apparatus already proposed by the applicant.

【図11】従来の分割ダイスの一例を示す斜視図であ
る。
FIG. 11 is a perspective view showing an example of a conventional split die.

【図12】図11に示す分割ダイスを使用して成形を行
っている状態を示す部分図である。
12 is a partial view showing a state where molding is performed using the split die shown in FIG. 11. FIG.

【符号の説明】[Explanation of symbols]

2 カップ部 3 クロス溝 4 粗形材 60 分割ダイス 60a 基板部 60b 突条 60c,60d 側面 61,62 突起部 2 cup part 3 cross groove 4 rough material 60 split die 60a substrate part 60b ridges 60c, 60d side face 61, 62 protrusion part

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 筒状の中空部の内側に、その中空部の内
周面に対して螺旋方向を向いたクロス溝を形成する突条
を設けた複数の分割ダイスを、それらの突条の螺旋方向
が交互に反対となるよう一定間隔に等配し、その分割ダ
イスに向けた前記中空部を外周側から押圧して塑性変形
を生じさせるレブロジョイント外輪の製造機構におい
て、 前記分割ダイスが、前記中空部を外周側から押圧する荷
重を受ける両側面をテーパ面とした矩形断面の基板部
に、前記突条をそのひとつの対角線方向に斜めに形成し
た構造であり、かつ基板部の前記突条を設けた面のう
ち、前記突条と交差する方向の他の対角線の近傍の所定
箇所もしくは該所定箇所と対向する前記中空部の内面所
定箇所の少なくともいずれか一方に突起部が形成されて
いることを特徴とするレブロジョイント外輪の製造機
構。
1. A plurality of split dies, each of which is provided with a projecting ridge for forming a cross groove in a spiral direction with respect to an inner peripheral surface of the hollow inside of the cylindrical hollow part, In the manufacturing mechanism of the Rebro joint outer ring for uniformly deforming the spiral direction alternately at regular intervals, and causing plastic deformation by pressing the hollow portion toward the split die from the outer peripheral side, the split die is It is a structure in which the protrusions are formed obliquely in one diagonal direction on a substrate portion having a rectangular cross section with tapered surfaces on both sides receiving a load that presses the hollow portion from the outer peripheral side, and the protrusion of the substrate portion is formed. A protrusion is formed on at least one of a predetermined location in the vicinity of another diagonal line in the direction intersecting with the protrusion or a predetermined location on the inner surface of the hollow portion facing the predetermined location on the surface provided with the stripe. Is characterized by Production mechanism of Les Bro joint outer ring.
JP21968392A 1992-07-27 1992-07-27 Producing mechanism for lovrd joint @(3754/24)cross groove universal joint) outer ring Pending JPH0639478A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21968392A JPH0639478A (en) 1992-07-27 1992-07-27 Producing mechanism for lovrd joint @(3754/24)cross groove universal joint) outer ring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21968392A JPH0639478A (en) 1992-07-27 1992-07-27 Producing mechanism for lovrd joint @(3754/24)cross groove universal joint) outer ring

Publications (1)

Publication Number Publication Date
JPH0639478A true JPH0639478A (en) 1994-02-15

Family

ID=16739340

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21968392A Pending JPH0639478A (en) 1992-07-27 1992-07-27 Producing mechanism for lovrd joint @(3754/24)cross groove universal joint) outer ring

Country Status (1)

Country Link
JP (1) JPH0639478A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008089013A (en) * 2006-09-29 2008-04-17 Jtekt Corp Cross groove type constant velocity joint
JP2008089014A (en) * 2006-09-29 2008-04-17 Jtekt Corp Cross groove type constant velocity joint

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008089013A (en) * 2006-09-29 2008-04-17 Jtekt Corp Cross groove type constant velocity joint
JP2008089014A (en) * 2006-09-29 2008-04-17 Jtekt Corp Cross groove type constant velocity joint

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