JPH0732038A - Method for manufacturing hollow shaft having contour - Google Patents
Method for manufacturing hollow shaft having contourInfo
- Publication number
- JPH0732038A JPH0732038A JP9394994A JP9394994A JPH0732038A JP H0732038 A JPH0732038 A JP H0732038A JP 9394994 A JP9394994 A JP 9394994A JP 9394994 A JP9394994 A JP 9394994A JP H0732038 A JPH0732038 A JP H0732038A
- Authority
- JP
- Japan
- Prior art keywords
- hollow shaft
- tube
- mold
- shaft
- central
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/10—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
- C21D7/12—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars by expanding tubular bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2221/00—Treating localised areas of an article
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2261/00—Machining or cutting being involved
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Fluid Mechanics (AREA)
- Forging (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
(57)【要約】 （修正有）
【目的】 材料の冷間成形能力を超えることなく管の中
央部分と端部分との間の直径比を増加することにより、
改良された製造方法を提供する。
【構成】 中空軸が端部分２および相対的に該軸の軸線
４に関連して半径方向に拡大される中央部分３を有し、
前記中空軸が一定の直径を有する管１から冷間成形によ
り製造され、前記管が端部分２用の保持領域７を備えた
内方長手方向輪郭を有するキヤビテイ６および保持領域
７の間に前記中空軸の中央部分３用の膨張領域８からな
る型５内に挿入され、前記管の外面が前記型のキヤビテ
イの内面に対して載るまで油圧により内方に加圧される
中空軸の製造方法において、膨張のために、型５内の管
１は、前記中央部分の長さに沿って、油圧を受け、そし
て前記型の外側で実施される処理工程において、中空軸
の端部分２に向けられる管１部分がそれらの元の断面に
対して機械的に減少される。
(57) [Summary] (Modified) [Purpose] By increasing the diameter ratio between the central and end portions of the pipe without exceeding the cold forming capacity of the material,
An improved manufacturing method is provided. A hollow shaft having an end portion 2 and a central portion 3 which is radially expanded relative to an axis 4 of the shaft,
Said hollow shaft is manufactured by cold forming from a tube 1 having a constant diameter, said tube being provided between a holding area 7 and a cavity 6 having an inner longitudinal profile with a holding area 7 for the end portion 2. Method for manufacturing a hollow shaft that is inserted into a mold 5 consisting of an expansion region 8 for the central portion 3 of the hollow shaft and is hydraulically pressurized inward until the outer surface of the tube rests against the inner surface of the cavity of the mold For expansion, the tube 1 in the mold 5 is subjected to hydraulic pressure along the length of the central part and is directed towards the end part 2 of the hollow shaft in the process step carried out outside the mold. The parts of the pipe 1 that are subjected to are mechanically reduced with respect to their original cross section.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、中空軸が端部分および
相対的に該軸の軸線に関連して半径方向に拡大される中
央部分を有し、前記中空軸が一定の直径を有する管から
冷間成形により製造され、前記管が端部分用の保持領域
を備えた内方長手方向輪郭を有するキヤビテイおよび前
記保持領域の間に前記中空軸の前記中央部分用の膨張領
域からなる型内に挿入され、該型がその後、少なくとも
前記中空軸の前記中央部分に設けられた部分において、
前記管の外面が前記型のキヤビテイの内面に対して載る
まで油圧圧力により内方に加圧される輪郭を有する中空
軸の製造方法に関するものてある。BACKGROUND OF THE INVENTION The present invention relates to a tube in which a hollow shaft has an end portion and a central portion which is radially enlarged relative to the axis of the shaft, said hollow shaft having a constant diameter. In a mold made of a cold-formed material from which the tube has a cavity having an inner longitudinal profile with a retaining region for the end portion and an expansion region for the central portion of the hollow shaft between the retaining regions. And the mold is then at least in a portion of the hollow shaft provided in the central portion,
It relates to a method of manufacturing a hollow shaft having a contour which is pressurized inward by hydraulic pressure until the outer surface of the tube rests against the inner surface of the mold cavity.
【０００２】[0002]
【従来の技術】より大きい中央部分および該中央部分の
直径より小さい直径、とくにより大きな壁厚を備えた端
部分を有する軸が引き抜きおよび／または打ち延ばし方
法により大量生産される。また内部油圧圧力により軸を
半径方向に膨張させることにより適宜に成形された型内
でこの型の軸の中央部分を変形させることも提案されて
いる。かかる方法は引き抜きまたは打ち延ばしにより付
与される制限に関係なく、強度疲労作用に関連して改善
される軸の製造を許容しかつ比較的コスト的に有効であ
る。Shafts having a larger central portion and an end portion with a diameter smaller than the diameter of the central portion, in particular with a larger wall thickness, are mass-produced by the drawing and / or casting method. It has also been proposed to radially expand the shaft by internal hydraulic pressure to deform the central part of the shaft of this mold in a suitably shaped mold. Such a method permits the manufacture of shafts which are improved in relation to the strength fatigue action and is relatively cost-effective, irrespective of the restrictions imposed by drawing or stamping.
【０００３】しかしながら、使用される材料の冷間成形
作用のため、変形方法は幾らかの制限を受ける。一方
で、中央部分の冷間成形能力の完全な利点を取るとき、
中央部分と端部分との間の直径比はすべての用途の条件
に合わない値に制限される。端部分の直径はそれぞれの
接続要素により予め定められる限界条件として見做され
ねばならない。他方で、とくに膨張された中央部分と膨
張されない端部分との間の遷移領域は変形の過程で損傷
を受けるかまたは、完全な変形が大量生産の間中制御し
得る内部圧力のため可能でない。However, the deformation process is subject to some limitations due to the cold forming effect of the materials used. On the other hand, when taking full advantage of the cold forming capacity of the central part,
The diameter ratio between the central and end portions is limited to a value that does not meet the requirements of all applications. The diameter of the end portions must be regarded as a limiting condition which is predetermined by the respective connecting element. On the other hand, especially the transition region between the expanded central part and the non-expanded end part is damaged in the course of the deformation or a complete deformation is not possible due to the internal pressure which can be controlled during mass production.
【０００４】[0004]
【発明が解決しようとする課題】それゆえ、本発明の目
的は材料の冷間成形の能力を超えることなく前記直径比
を増加することにより、言い換えれば、亀裂形成の危険
を減少することにより上記欠点を克服する改良された変
形方法を提供することにある。The object of the present invention is therefore to increase the diameter ratio without exceeding the cold forming capacity of the material, in other words by reducing the risk of crack formation. The object is to provide an improved variant method which overcomes the drawbacks.
【０００５】[0005]
【課題を解決するための手段】本発明による第１の方法
によれば、膨張のために、型内の管が、少なくとも膨張
されるべき中央部分の長さに沿って、油圧圧力を受け、
そして前記型の外側で実施されるべき処理工程におい
て、中空軸の端部分に向けられる前記管部分がそれらの
元の断面に対して機械的に減少されることが提案され
る。実質上端部分を減少することにより、元の管部材の
冷間成形能力は端部分の領域においても同様に十分に利
点を有し、その結果として、高い比率が中央部分および
端部分の直径間で材料が破壊状態で伸びに近づくような
範囲に負荷を増大することなく得られる。端部分を形成
する方法は軸の軸受として使用されるような部分を許容
するために歯付き輪郭を設けるための機械的手段と組み
合わされ得る。According to a first method according to the invention, for expansion, the tubes in the mold are subjected to hydraulic pressure, at least along the length of the central part to be expanded,
It is then proposed that in the processing steps to be carried out on the outside of the mould, the tube sections directed towards the end sections of the hollow shaft are mechanically reduced with respect to their original cross section. By substantially reducing the upper end portion, the cold forming capacity of the original tube member has the same significant advantages in the region of the end portion as well, with the result that a high ratio between the central and end portion diameters. It is obtained without increasing the load to the extent that the material approaches elongation in the fractured state. The method of forming the end portions may be combined with mechanical means for providing a toothed profile to allow the portions to be used as shaft bearings.
【０００６】中央部分の半径方向の変形、それ自体公知
の方法は適宜な型内で行われる。管部材全体が内部圧力
を受けるならば、軸の軸受は型により締め付けられねば
ならない。中空軸の軸方向性に関して、これは好適な方
法である。しかしながら、適宜な密封手段を使用するこ
とにより、また、端部分、または少なくともその幾つか
の部分を、膨張作業の間中内部圧力なしに保持すること
が可能である。The radial deformation of the central part, a method known per se, is carried out in suitable molds. If the entire tube member is subjected to internal pressure, the shaft bearing must be clamped by the mould. With respect to the axial nature of the hollow shaft, this is the preferred method. However, by using suitable sealing means, it is also possible to hold the end part, or at least some parts thereof, without internal pressure during the expansion operation.
【０００７】本発明による他の方法は、半径方向の膨張
作業を実施する前に、強度低減操作が膨張されるべき前
記中空軸の前記中央部分に向けられる管部分の軸方向中
央部分に実施され、その結果内部油圧圧力がここから開
始しかつ中央部分の軸方向端に漸進する。この手段はと
くにその軸方向中心の領域において膨張されるべき中央
部分と型の内面との間の初期接触を達成し、隣接領域は
より少ない範囲で半径方向に変形される。したがつて、
材料は軸方向に流動することにより行われることがで
き、中央部分全体の完全な半径方向の変形が次いで軸方
向に外方に漸進することにより行われる。材料を軸方向
に流動することにより追随させることにより、破壊範囲
での伸び以下である好都合な３つの軸方向応力状態を観
察することができる。Another method according to the invention is carried out on the axial central part of the tube section, in which a strength reduction operation is directed to the central part of the hollow shaft to be expanded before carrying out the radial expansion operation. As a result, the internal hydraulic pressure starts here and progresses to the axial end of the central part. This means achieves an initial contact between the central part to be expanded and the inner surface of the mould, especially in the region of its axial center, the adjacent regions being deformed radially to a lesser extent. Therefore,
The material can be made to flow axially and the complete radial deformation of the entire central portion is then made to progress axially outward. By following the material by flowing it in the axial direction, one can observe three favorable axial stress states below the elongation in the fracture range.
【０００８】本発明により提案されるような強度減少作
用は軸方向中心において適宜な熱処理を実施することに
より、または壁厚を減少することにより行われることが
でき、壁厚の減少は好ましくは管部材を仕上げ旋削する
ことにより達成される。半径方向変形方法は好都合には
端部材に軸方向推力を印加することにより支援され、そ
れにより管部材の軸方向短縮と半径方向変形を結合す
る。最初に変化されない端部分はその後圧搾仕上げまた
は打ち延ばし作業の形において非チツプ形成作業を加え
ることにより歯付き輪郭を備えることができ、端部分の
断面の減少かつしたがつて壁厚の増加は同時に行われ
る。The strength-reducing action as proposed by the invention can be carried out by carrying out a suitable heat treatment in the axial center or by reducing the wall thickness, which is preferably a pipe. This is achieved by finishing turning the part. The radial deformation method is conveniently assisted by applying an axial thrust to the end members, thereby combining the axial shortening and radial deformation of the tube member. The initially unaltered end portion can then be provided with a toothed profile by applying a non-chip forming operation in the form of a squeeze finishing or blasting operation, the reduction of the cross section of the end portion and thus the increase of the wall thickness at the same time. Done.
【０００９】中央部分の変形は適宜な型キヤビテイを有
する型内で行われる。管部材全体は端部分が型により締
め付けられるように内部圧力を受ける。仕上げられた中
空軸の軸方向性に関連して、この方法が好ましい。しか
しながら、適宜な密封手段を使用することにより、ま
た、端部分、または少なくともその幾つかの部分を膨張
作業の間中内部圧力なしに保持することができる。The deformation of the central portion is carried out in a mold having suitable mold cavities. The entire tube member is subjected to internal pressure so that the end portion is clamped by the mold. This method is preferred in connection with the axial nature of the finished hollow shaft. However, by using suitable sealing means, it is also possible to hold the end part, or at least some parts thereof, without internal pressure during the expansion operation.
【００１０】第２の方法の好適な実施例は、第１の方法
にしたがつて、中央部分が内部圧力により半径方向に変
形された後端部分がそれらの元の直径に対して機械的に
減少されることからなる。実質上端部分を減少すること
により、元の管部材の冷間成形能力は、端部分の領域に
おいても同様に十分利点があり、その結果高い比率が材
料が破壊状態において伸びに近づくような範囲に負荷を
増加することなく中央部分および端部分の直径間で得ら
れる。再び、端部分を形成する方法は歯付き輪郭を設け
るための機械的作業と結合され得る。A preferred embodiment of the second method is according to the first method, in which the central portion is radially deformed by internal pressure so that the rear end portions mechanically with respect to their original diameters. Consists of being reduced. By substantially reducing the upper end, the cold forming capacity of the original tube member is equally beneficial in the region of the end as well, with the result that a high ratio is in the range where the material approaches elongation in the fracture state. Obtained between the diameters of the central and end portions without increasing the load. Again, the method of forming the end portion can be combined with mechanical work to provide the toothed contour.
【００１１】本方法の好適な実施例を以下に図面を参照
して説明する。A preferred embodiment of the method will be described below with reference to the drawings.
【００１２】[0012]
【実施例】図１は断面の半分の形においてかつ幾つかの
部分に分割された型５を示し、管部材１が挿入されてい
る。ハツチングは管部材１の開始状態に言及する。長さ
Ｅ1 ，Ｅ2 を有するその端部材２1 ，２2 は型により支
持され、これに反して長さＭを有するその中央部材３は
型５の型キヤビテイ６の内面から距離をおいて位置決め
される。型キヤビテイ６は端部分２と連係する保持領域
７1 ，７2 、および中央領域と連係する膨張領域８から
なる。端部分２1 ，２2 と最大直径を備えた長さＭ
m a x を有する中央部分３の領域との間には、型５のキ
ヤビテイ６内に円錐遷移領域９1 , ９2 が設けられる。1 shows a mold 5 in the form of half a cross section and divided into several parts, in which a tube member 1 is inserted. Hatching refers to the starting state of the tube member 1. Its end members 2 1 , 2 2 having lengths E 1 , E 2 are supported by a mold, while its central member 3 having a length M, on the contrary, is spaced from the inner surface of the mold cavity 6 of the mold 5. Positioned. Mold cavity 6 is composed of the holding region 7 1, 7 2, and a central region and cooperating expansion zone 8 that links the end portions 2. Length M with end portions 2 1 , 2 2 and maximum diameter
Between the region of the central part 3 having max , there are conical transition regions 9 1, 9 2 in the cavity 6 of the mold 5.
【００１３】好都合な実施例において、その軸方向中心
１１に向かって、管部材１の中央部分３は減少された壁
厚を有する領域からなる。最小の壁厚は参照記号Ｓ
m i n で示される。In the preferred embodiment, towards its axial center 11, the central portion 3 of the tube member 1 consists of a region with a reduced wall thickness. The minimum wall thickness is the reference symbol S
indicated by min .
【００１４】内部油圧圧力を受けるときこの実施例にお
ける管部材１の変形作用は該管部材１がハツチングなし
の点線の輪郭線により示される中間状態により示され
る。管部材１の中央部分３の軸方向中心１１はすでに型
５のキヤビテイ６の膨張領域８の内面に接触する一方、
滑らかな遷移が下方に形成される端部分２1 ，２2 に向
かって形成される。十字ハツチングは中央部分３全体が
その過程において型５の内壁に載置する第１処理工程を
通過した後の管部材１の状態に言及し、その結果中央部
分３は端部分２1 ，２2 に対して増加した直径からな
り、これに対して端部分は型キヤビテイ６の保持領域７
に載置しかつそれらの開始直径を保持した。軸方向矢印
は変形処理の間中管状軸の端部に印加される軸方向推力
を示す。The deforming action of the tubular member 1 in this embodiment when subjected to an internal hydraulic pressure is illustrated by the intermediate state in which the tubular member 1 is shown without hatching by the dotted outline. While the axial center 11 of the central portion 3 of the tube member 1 is already in contact with the inner surface of the expansion region 8 of the cavity 6 of the mold 5,
A smooth transition is formed towards the end portions 2 1 , 2 2 which are formed below. The cross-hatching refers to the condition of the tube member 1 after the entire central part 3 has passed the first treatment step in which the whole is mounted on the inner wall of the mold 5, so that the central part 3 is the end parts 2 1 , 2 2 To the holding area 7 of the mold cavity 6 whereas the end portion has an increased diameter.
And kept their starting diameter. The axial arrow indicates the axial thrust applied to the end of the tubular shaft during the deformation process.
【００１５】図２は複数の部分に分割された変形された
管部材１’の断面の半分である。十字ハツチングは中間
の結果に至る以前の第１処理工程の完了後のかつその場
合に管部材の形状が図１に十字ハツチングにより示した
状態に対応する、その変形された状態に言及する。図２
において、本発明による第２処理工程の完了後の最終結
果は密な十字により示される。長さＥ1 ，Ｅ2 を有する
端部分２1 ，２2 は管部材１の開始形状に対して実質上
減少され、その結果その壁厚は増加される。半径方向の
矢印は前記変形処理に言及する。再び、円錐または同様
に滑らかな遷移領域が最大直径を有する長さＭ’の中央
部分３’と長さＥ1 ，Ｅ2 の端部分２1，２2 との間に
設けられる。この方法において、材料の冷間成形能力の
全利点をとることにより、極端な比率が極めて高い強
度、軽量軸を製造するために中央部分と端部分の直径間
に達成される。FIG. 2 is a half of a cross section of a deformed tube member 1'divided into a plurality of parts. Cross-hatching refers to its deformed state after completion of the first processing step before reaching an intermediate result and in which case the shape of the tube member corresponds to the state shown by cross-hatching in FIG. Figure 2
In, the final result after the completion of the second processing step according to the invention is indicated by a dense cross. The end portions 2 1 , 2 2 having the lengths E 1 , E 2 are substantially reduced with respect to the starting shape of the tube member 1, so that its wall thickness is increased. Radial arrows refer to the deformation process. Again, a cone or a similarly smooth transition region is provided between the central portion 3'of length M'having the largest diameter and the end portions 2 1 , 2 2 of length E 1 , E 2 . In this way, by taking all the advantages of the cold forming capacity of the material, extreme proportions are achieved between the diameters of the central and end parts to produce extremely high strength, lightweight shafts.
【００１６】以下、本発明の好適な実施態様を例示す
る。 １． 前記中央部分（３）を半径方向に変形するとき、
前記端部分（２）が前記型により締め付けられることを
特徴とする請求項１に記載の輪郭を有する中空軸の製造
方法。The preferred embodiments of the present invention will be illustrated below. 1. When the central part (3) is deformed in the radial direction,
A method according to claim 1, characterized in that the end portion (2) is clamped by the mold.
【００１７】２． 前記中央部分（３）を半径方向に変
形するとき、前記端部分（２）が密封手段により内部圧
力から保護されることを特徴とする請求項１に記載の輪
郭を有する中空軸の製造方法。2. Method according to claim 1, characterized in that the end portion (2) is protected from internal pressure by a sealing means when the central portion (3) is radially deformed.
【００１８】３． 前記内部油圧圧力による前記中央部
分（３）の変形が、短縮されている管部材を結果として
生じる、前記端部分（２）に加えられる軸方向推力によ
り支援されることを特徴とする請求項１、前記１または
２のいずれか１項に記載の輪郭を有する中空軸の製造方
法。3. Deformation of the central portion (3) by the internal hydraulic pressure is assisted by axial thrust exerted on the end portion (2) resulting in a shortened tube member. A method for manufacturing a hollow shaft having the contour described in any one of 1 and 2 above.
【００１９】４． 前記強度低減が材料品質に影響を及
ぼすことにより、とくに熱処理により達成されることを
特徴とする請求項２に記載の輪郭を有する中空軸の製造
方法。4. A method according to claim 2, characterized in that the reduction of strength is achieved by affecting the material quality, in particular by heat treatment.
【００２０】５． 強度減少が壁厚を減少することによ
り、とくに仕上げ旋盤作業により達成されることを特徴
とする請求項２に記載の輪郭を有する中空軸の製造方
法。5. 3. A method of manufacturing a hollow shaft with contours as claimed in claim 2, characterized in that the strength reduction is achieved by reducing the wall thickness, in particular by finishing lathe work.
【００２１】６． 前記油圧圧力による前記管の半径方
向膨張が該管を短縮するために該管（１）の軸方向端に
加えられる軸方向推力により支援されることを特徴とす
る請求項２、前記４または５のいずれか１項に記載の輪
郭を有する中空軸の製造方法。6. Radial expansion of the tube by the hydraulic pressure is assisted by axial thrust applied to the axial end of the tube (1) to shorten the tube. A method of manufacturing a hollow shaft having a contour according to any one of 1.
【００２２】７． 前記中空軸の前記端部分（２）に向
けられる前記管（１）部分が歯付き輪郭を備えることを
特徴とする請求項２または前記４〜６のいずれか１項に
記載の輪郭を有する中空軸の製造方法。7. Hollow with contour according to any one of claims 2 or 4 to 6, characterized in that the portion of the tube (1) directed towards the end portion (2) of the hollow shaft comprises a toothed contour. Shaft manufacturing method.
【００２３】８． 前記端部分（２）は打ち延ばしによ
り減少され、とくに歯付き輪郭は非チツプ成形方法にお
いて形成されることを特徴とする請求項２または前記４
〜７のいずれか１項に記載の輪郭を有する中空軸の製造
方法。8. 2. The end portion (2) is reduced by stamping, in particular the toothed contour is formed in a non-chip forming method.
A method of manufacturing a hollow shaft having a contour according to any one of items 1 to 7.
【００２４】[0024]
【発明の効果】叙上のごとく、本発明は、中空軸が端部
分および相対的に該軸の軸線に関連して半径方向に拡大
される中央部分を有し、前記中空軸が一定の直径を有す
る管から冷間成形により製造され、前記管が端部分用の
保持領域を備えた内方長手方向輪郭を有するキヤビテイ
および前記保持領域の間の、前記中空軸の前記中央部分
用の膨張領域からなる型内に挿入され、該型がその後、
少なくとも前記中空軸の前記中央部分に設けられた部分
において、前記管の外面が前記型のキヤビテイの内面に
対して載るまで油圧圧力により内方に加圧される輪郭を
有する中空軸の製造方法において、膨張のために、前記
型内の前記管は、少なくとも膨張されるべき前記中央部
分の長さに沿って、油圧圧力を受け、そして前記型の外
側で実施されるべき処理工程において、前記中空軸の前
記端部分に向けられる前記管部分がそれらの元の断面に
対して機械的に減少される構成とし、また、中空軸が端
部分および相対的に該軸の軸線に関連して半径方向に拡
大される中央部分を有し、前記中空軸が一定の直径を有
する管から冷間成形により製造され、前記管が端部分用
の保持領域を備えた内方長手方向輪郭を有するキヤビテ
イおよび前記保持領域の間の、前記中空軸の前記中央部
分用の膨張領域からなる型内に挿入され、該型がその
後、少なくとも前記中空軸の前記中央部分に設けられた
部分において、前記管の外面が前記型のキヤビテイの内
面に対して載るまで油圧圧力により内方に加圧される輪
郭を有する中空軸の製造方法において、半径方向の膨張
操作を実施する前に、強度低減操作が膨張されるべき前
記中空軸の前記中央部分に向けられる前記管部分の軸方
向中央部分に実施される構成としたので、材料の冷間成
形能力を超えることなく管部材の中央部分と端部分との
間の直径比を増加することにより、言い換えれば亀裂形
成の危険を減少することにより従来技術の欠点を克服す
る輪郭を有する中空軸の製造方法を提供することができ
る。As described above, the present invention provides that the hollow shaft has an end portion and a central portion that is radially expanded relative to the axis of the shaft, the hollow shaft having a constant diameter. An expansion region for the central portion of the hollow shaft between a holding region and a cavity having an inner longitudinal profile with the holding region for the end portion produced by cold forming from a pipe having Is inserted into a mold consisting of
In a method of manufacturing a hollow shaft having a contour, which is pressurized inward by hydraulic pressure until at least a portion of the hollow shaft provided in the central portion of the hollow shaft rests against an inner surface of a cavity of the mold. , For expansion, the tube in the mold is subjected to hydraulic pressure, at least along the length of the central part to be expanded, and in the processing step to be carried out outside the mold, the hollow The tube portions directed towards the end portion of the shaft are mechanically reduced with respect to their original cross-section, and the hollow shaft is radial with respect to the end portion and relative to the axis of the shaft. A cavity having a central portion that is enlarged into a hollow shaft, the hollow shaft being manufactured by cold forming from a tube having a constant diameter, the tube having an inner longitudinal profile with a retaining region for an end portion; Retention The outer surface of the tube is inserted into a mold consisting of an expansion region for the central part of the hollow shaft between the zones, which mold is then at least at the part provided in the central part of the hollow shaft. In a method of manufacturing a hollow shaft having a contour that is inwardly pressurized by hydraulic pressure until it rests against the inner surface of the mold cavity, the strength reducing operation should be expanded prior to performing the radial expansion operation. Since it is configured to be carried out in the axial central portion of the tube portion directed to the central portion of the hollow shaft, the diameter ratio between the central portion and the end portion of the tubular member without exceeding the cold forming capacity of the material. By increasing, in other words, it is possible to provide a method of manufacturing a hollow shaft with a contour, which overcomes the drawbacks of the prior art by reducing the risk of crack formation.
【図１】本発明による方法の第１工程の原理を示す、変
形前後の挿入された管を示している型の半分の長手方向
断面図である。1 is a longitudinal cross-section of the mold half showing the inserted tube before and after deformation, illustrating the principle of the first step of the method according to the invention.
【図２】さらに他の変形作業前後の、すなわち本発明に
よる方法の第２の工程の原理を示す、図１により変形さ
れた管の長手方向断面図である。2 is a longitudinal sectional view of a tube modified according to FIG. 1, before and after a further deformation operation, ie showing the principle of the second step of the method according to the invention.
１ 管部材 ２（２1 ，２2 ） 端部分 ３ 中央部分 ５ 型 ６ 型キヤビテイ ７（７1 ，７2 ） 保持領域 ８ 膨張領域1 Pipe Member 2 (2 1 , 2 2 ) End Part 3 Central Part 5 Type 6 Type Cavity 7 (7 1 , 7 2 ) Holding Area 8 Expansion Area
───────────────────────────────────────────────────── フロントページの続き (72)発明者 ヘルベルト・フリーリングスドルフ ドイツ連邦共和国 ジークブルク、ズュー トシュトラーセ 50アー (72)発明者 クラウス・グロイリッヒ ドイツ連邦共和国 ブライトシャイト−ホ ーリク、ミューレンシュトラーセ １ ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Herbert Freelingsdorf, Südstraße 50, Siegburg, Federal Republic of Germany (72) Inventor, Klaus Groillich, Breitscheid-Hollic, Muhrenstraße, Germany 1
Claims (2)
軸の軸線（４）に関連して半径方向に拡大される中央部
分（３）を有し、前記中空軸が一定の直径を有する管
（１）から冷間成形により製造され、前記管が端部分
（２）用の保持領域（７）を備えた内方長手方向輪郭を
有するキヤビテイ（６）および前記保持領域（７）の間
に前記中空軸の前記中央部分（３）用の膨張領域（８）
からなる型（５）内に挿入され、該型（５）がその後、
少なくとも前記中空軸の前記中央部分（３）に設けられ
た部分において、前記管の外面が前記型のキヤビテイの
内面に対して載るまで油圧圧力により内方に加圧される
輪郭を有する中空軸の製造方法において、 膨張のために、前記型（５）内の前記管（１）は、少な
くとも膨張されるべき前記中央部分の長さに沿って、油
圧圧力を受け、そして前記型の外側で実施されるべき処
理工程において、前記中空軸の前記端部分（２）に向け
られる前記管（１）部分がそれらの元の断面に対して機
械的に減少されることを特徴とする輪郭を有する中空軸
の製造方法。1. A hollow shaft having an end portion (2) and a central portion (3) which is radially expanded relative to the axis (4) of the shaft, said hollow shaft having a constant diameter. A cavity (6) manufactured by cold forming from a tube (1) having an inner wall, the tube having an inner longitudinal profile with a holding area (7) for an end portion (2) and said holding area (7). An expansion region (8) for the central portion (3) of the hollow shaft between
Inserted into a mold (5) consisting of
At least in the portion provided in the central portion (3) of the hollow shaft, a hollow shaft having a contour that is pressurized inward by hydraulic pressure until the outer surface of the tube rests against the inner surface of the cavity of the mold. In the manufacturing method, for expansion, the tube (1) in the mold (5) is subjected to hydraulic pressure, at least along the length of the central part to be expanded, and is carried out outside the mold. Hollows with contours characterized in that, in the process step to be performed, the pipe (1) parts directed towards the end parts (2) of the hollow shaft are mechanically reduced with respect to their original cross section. Shaft manufacturing method.
軸の軸線（４）に関連して半径方向に拡大される中央部
分（３）を有し、前記中空軸が一定の直径を有する管
（１）から冷間成形により製造され、前記管が端部分
（２）用の保持領域（７）を備えた内方長手方向輪郭を
有するキヤビテイ（６）および前記保持領域（７）の間
の、前記中空軸の前記中央部分（３）用の膨張領域
（８）からなる型（５）内に挿入され、該型（５）がそ
の後、少なくとも前記中空軸の前記中央部分（３）に設
けられた部分において、前記管の外面が前記型のキヤビ
テイの内面に対して載るまで油圧圧力により内方に加圧
される輪郭を有する中空軸の製造方法において、 半径方向の膨張操作を実施する前に、強度低減操作が膨
張されるべき前記中空軸の前記中央部分（３）に向けら
れる前記管（１）部分の軸方向中央部分（１１）に実施
されることを特徴とする輪郭を有する中空軸の製造方
法。2. A hollow shaft has an end portion (2) and a central portion (3) which is radially enlarged relative to the axis (4) of said shaft, said hollow shaft having a constant diameter. A cavity (6) manufactured by cold forming from a tube (1) having an inner wall, the tube having an inner longitudinal profile with a holding area (7) for an end portion (2) and said holding area (7). Between the hollow shaft and the mold (5) consisting of an expansion region (8) for the central part (3) of the hollow shaft, which mold (5) is then at least the central part (3) of the hollow shaft. ), A method of manufacturing a hollow shaft having a contour in which the outer surface of the tube is pressed inward by hydraulic pressure until the outer surface of the tube rests against the inner surface of the cavity of the mold. Prior to carrying out the strength reduction operation, the hollow shaft inside the hollow shaft to be expanded Method of manufacturing a hollow shaft having a contour, characterized in that it is carried to the portion (3) the tube is directed to (1) the axial center portion of the portion (11).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19934311875 DE4311875A1 (en) | 1993-04-10 | 1993-04-10 | Method for the production of hollow shafts with a profile |
| DE19934311909 DE4311909A1 (en) | 1993-04-10 | 1993-04-10 | Method for the production of hollow shafts with a profile |
| DE43-11-875-5 | 1993-04-10 | ||
| DE43-11-909-3 | 1993-04-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0732038A true JPH0732038A (en) | 1995-02-03 |
Family
ID=25924840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9394994A Pending JPH0732038A (en) | 1993-04-10 | 1994-04-08 | Method for manufacturing hollow shaft having contour |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0732038A (en) |
| FR (1) | FR2703606A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10000054A1 (en) * | 2000-01-03 | 2001-07-05 | Anton Bauer Werkzeug Und Masch | Internal high pressure deformation process, involving weakening workpiece in first wall region and deforming by pressing material from it into second wall region |
| DE10212400C5 (en) * | 2002-03-13 | 2010-05-20 | Benteler Automobiltechnik Gmbh | Process for producing a molded component |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0386325A (en) * | 1989-08-28 | 1991-04-11 | Usui Internatl Ind Co Ltd | Manufacture of multilayered bellows pipe |
| JPH03294023A (en) * | 1990-04-11 | 1991-12-25 | Mitsubishi Heavy Ind Ltd | Manufacture of double tube bellows |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2096474B3 (en) * | 1970-06-25 | 1973-04-27 | Motoren Turbinen Union | |
| JPS59225835A (en) * | 1983-06-06 | 1984-12-18 | Isao Kimura | Manufacture of monolithic type crank material for bicycle |
| DE4201819A1 (en) * | 1991-01-28 | 1992-07-30 | Mannesmann Ag | METHOD AND DEVICE FOR THE HYDRAULIC EXPANSION OF TUBULAR HOLLOW PROFILES |
| DE4103083C1 (en) * | 1991-02-01 | 1992-05-27 | H.D. Eichelberg & Co Gmbh, 5750 Menden, De | Steel pipe branch for IC engine exhaust - is formed by integral, hydrostatically shaped component with inner, longitudinal flanges |
-
1994
- 1994-04-08 JP JP9394994A patent/JPH0732038A/en active Pending
- 1994-04-08 FR FR9404183A patent/FR2703606A1/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0386325A (en) * | 1989-08-28 | 1991-04-11 | Usui Internatl Ind Co Ltd | Manufacture of multilayered bellows pipe |
| JPH03294023A (en) * | 1990-04-11 | 1991-12-25 | Mitsubishi Heavy Ind Ltd | Manufacture of double tube bellows |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2703606A1 (en) | 1994-10-14 |
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