JPH0994629A - Form-rolling method and die for form-rolling - Google Patents
Form-rolling method and die for form-rollingInfo
- Publication number
- JPH0994629A JPH0994629A JP25126595A JP25126595A JPH0994629A JP H0994629 A JPH0994629 A JP H0994629A JP 25126595 A JP25126595 A JP 25126595A JP 25126595 A JP25126595 A JP 25126595A JP H0994629 A JPH0994629 A JP H0994629A
- Authority
- JP
- Japan
- Prior art keywords
- wedge
- roll
- shaped
- center
- shaping
- 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
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
- B21K1/066—Making machine elements axles or shafts splined
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、動力機械または工
作機械等の部品の中間成形品である段付き軸を加工する
方法およびその方法を実施するときに用いるのに好適な
ダイスに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing a stepped shaft which is an intermediate molded product of a part such as a power machine or a machine tool, and a die suitable for use in carrying out the method. .
【０００２】[0002]
【従来の技術】動力機械や工作機械の部品の中間成形品
である段付き軸は、一般に、転造加工によって製造され
る。この段付き軸の転造加工は、素材周囲の二方または
三方以上から、回転する素材に平板状ダイスまたはロ−
ルダイスを押し付けることによって行われる。このとき
ダイスの楔状突起により絞られた素材の体積は、軸方向
に逃げることになる。このため、二つの隣接する絞られ
た部分の間に、絞られた体積が制御されずに集積すると
局所的な盛上がり等の欠陥が発生する。2. Description of the Related Art Stepped shafts, which are intermediate molded products of parts of power machines and machine tools, are generally manufactured by rolling. This stepped shaft is rolled from two or more sides around the material to the rotating material by a flat plate die or roll.
It is done by pressing the red die. At this time, the volume of the material squeezed by the wedge-shaped protrusions of the die escapes in the axial direction. For this reason, if the squeezed volume is accumulated uncontrolled between two adjacent squeezed portions, defects such as local swelling occur.
【０００３】したがって多段の段付き軸を成形する場
合、従来は例えば特開昭６２−２４４５４５号公報に開
示されているように、まず素材の一カ所または二カ所に
絞り成形を加え、それによる素材の伸びが完了してから
次の位置での絞り成形を開始する方法がとられてきた。
このため、楔状突起を、素材との接触時期がずれるよう
に平板状ダイスの素材軸方向に垂直な方向またはロ−ル
ダイスの周方向に間隔をあけて配置する方法が採られ
る。この開示例では素材に加えられる最初の加工は、ダ
イス上に平行に並んだ二個の楔状突起によって加えられ
る絞り加工である。Therefore, in the case of forming a multi-stepped shaft, conventionally, for example, as disclosed in Japanese Patent Laid-Open No. 62-244545, drawing forming is firstly applied to one or two places of the material, and the resulting material is used. A method has been adopted in which the drawing at the next position is started after the elongation of the sheet is completed.
Therefore, a method is adopted in which the wedge-shaped protrusions are arranged at intervals in the direction perpendicular to the material axis direction of the flat plate die or in the circumferential direction of the roll die so that the contact timing with the material is shifted. The first process applied to the blank in this disclosed example is the drawing process applied by two parallel wedges on the die.
【０００４】この最初の加工において、絞られた体積は
それら楔間ではなく双方の楔の外側へ押し出され、それ
ら外側へ押し出された素材に対して回転中の次の部分の
ダイスが加工を付与することになる。このような加工方
法では、ダイスの楔状突起の間に間隔があくので、円周
上に配置される全体のダイス長は長くなり、ロ−ル径は
大きくなる。In this first machining, the squeezed volume is extruded to the outside of both wedges, not between the wedges, and a die in the next rotating portion imparts the machining to the material extruded to the outside. Will be done. In such a processing method, since there is a gap between the wedge-shaped protrusions of the die, the length of the entire die arranged on the circumference becomes long and the roll diameter becomes large.
【０００５】[0005]
【発明が解決しようとする課題】多段の段付き軸成形の
場合、成形する段数に応じた数の楔状突起をダイスに設
ける。従来法の場合は、前記したように段階的に加工を
行い、軸方向に伸ばしてゆくために、最終段階では加工
に必要なダイス長が長くなってしまう。したがって、工
具が大きくなり工具費が高価になり、さらにその大きな
工具を駆動するための設備も大がかりになる。In the case of multistage stepped shaft forming, the die is provided with wedge-shaped projections in the number corresponding to the number of steps to be formed. In the case of the conventional method, since the machining is performed stepwise as described above and is extended in the axial direction, the die length required for the machining becomes long at the final stage. Therefore, the tool becomes large, the cost of the tool becomes expensive, and the equipment for driving the large tool becomes large.
【０００６】ロ−ルダイスを用いる場合、ロ−ル面上の
ダイス長が長くなることはロ−ル径が大きくなることを
意味する。例えば三個のロ−ルダイスを用いた加工を行
う場合には、ロ−ル径を大きくしすぎると、互いのロ−
ルが干渉して素材とロ−ルが接触できなくなり、加工そ
のものが不可能となる。したがって、従来法では三個以
上のロ−ルダイスでの多段段付き軸成形が不可能となる
場合が多かった。本発明はかかる問題点を解決すべく、
多段の段付き軸を成形する転造加工において、ロ−ルダ
イスの楔状突起の間隔をあけることなく一つづきの楔状
突起により同時に加工を行うことを可能とし、必要ダイ
ス長を短縮することを目的とする。When a roll die is used, a longer die length on the roll surface means a larger roll diameter. For example, in the case of processing using three roll dies, if the roll diameters are too large, the rolls of each
The material interferes with the roll due to the interference of the rolls, making the processing itself impossible. Therefore, in the conventional method, it was often impossible to form a multi-stepped shaft with three or more roll dies. The present invention aims to solve such problems,
In the rolling process for forming multi-stepped shafts, it is possible to simultaneously perform processing with one wedge-shaped protrusion without spacing the wedge-shaped protrusions of the roll die, and to reduce the required die length. To do.
【０００７】ここで、単にロ−ルというときダイスを配
置しない状態の基準ロ−ルのことをいい、その直径をロ
−ル基準径という。ロ−ル面とは基準ロ−ルの面をい
う。ダイス長が短いとはロ−ル面に配置されたダイスの
円周方向の長さが短いことをいう。楔状突起の底面の中
心線とは、ロ−ル面と接する楔状突起の底面とロ−ル中
心軸に平行な直線との二つの交点の中心を結んで出来る
曲線をいう。Here, when simply called a roll, it means a reference roll in a state where no die is arranged, and its diameter is called a roll reference diameter. The roll surface is the surface of the reference roll. The short die length means that the die arranged on the roll surface has a short circumferential length. The center line of the bottom surface of the wedge-shaped projection refers to a curve formed by connecting the centers of two intersections of the bottom surface of the wedge-shaped projection that is in contact with the roll surface and a straight line parallel to the center axis of the roll.
【０００８】[0008]
【課題を解決するための手段】本発明者らは、丸棒素材
を一定の回転速度で回転させながら、丸棒素材の二カ所
を同時に同じ縮径率で絞り、絞った部分の体積を素材端
部へ逃がす成形実験を行った。その結果、加工中の任意
の時期における素材の軸方向への伸びは、加工開始から
の素材の回転角で決まることを確認した。すなわち、加
工開始からの回転角で決まる軸方向の伸びた位置に楔状
突起を配置すれば、素材の伸びに追随して素材に加工を
付与することができる。したがって、複数箇所に絞り成
形を加えて段付き軸を成形する場合、加工開始からの素
材の回転角で決まる軸方向位置に絞り成形箇所と同数の
楔状突起を配置することにより、欠陥を生じることなく
絞り成形を施すことができる。[Means for Solving the Problems] While rotating the round bar material at a constant rotation speed, the inventors of the present invention simultaneously squeeze the two points of the round bar material at the same diameter reduction rate to reduce the volume of the narrowed material. A molding experiment was carried out in which it escapes to the end. As a result, it was confirmed that the axial elongation of the material at any time during processing is determined by the rotation angle of the material from the start of processing. That is, if the wedge-shaped protrusions are arranged at positions that extend in the axial direction determined by the rotation angle from the start of processing, the material can be processed in accordance with the elongation of the material. Therefore, when drawing a stepped shaft by adding draw forming to multiple locations, defects may occur by arranging the same number of wedge-shaped protrusions as the draw forming locations in the axial position determined by the rotation angle of the material from the start of processing. It can be drawn without drawing.
【０００９】ここに、本発明は、以下の多段段付き軸を
成形する転造加工方法およびその方法の実施に好適なダ
イスを要旨とする。（図１〜５参照） （１）多段の段付き軸を成形する転造加工において、加
工進行中の素材の伸びに追随して素材に加工を付与した
後、素材の軸方向への伸びが停止した後素材を仕上げ加
工することを特徴とする転造加工方法。Here, the gist of the present invention is a rolling method for forming a multi-stepped shaft and a die suitable for carrying out the method. (Refer to FIGS. 1 to 5) (1) In the rolling process for forming a multi-stepped shaft, after the material is processed in accordance with the elongation of the material being processed, the elongation of the material in the axial direction is A rolling method characterized by finishing the material after stopping.
【００１０】（２）ロ−ルダイスのロ−ル面１上の一定
部分に複数個の楔状突起２ａ、２ｂ、２ｃ、…を有する
ロ−ルダイスであって、各楔状突起が下記の特徴を有す
るロ−ルダイス。(2) A roll die having a plurality of wedge-shaped protrusions 2a, 2b, 2c, ... At a certain portion on the roll surface 1 of the roll die, each wedge-shaped protrusion having the following characteristics. Roll dice.
【００１１】 各楔状突起は、食い込み部θ1 、幅広
げ部θ2 、整形移行部θ3 および整形部θ4 からなる。Each wedge-shaped protrusion is composed of a biting portion θ 1 , a widening portion θ 2 , a shaping transition portion θ 3 and a shaping portion θ 4 .
【００１２】 各楔状突起の食い込み部が始まる位置
を、ロ−ル垂直断面でロ−ル中心軸３に関して円周角ゼ
ロの位置０とするとき、円周角の増大につれ、各楔状突
起とも上記に記載した食い込み部θ1 、幅広げ部θ2
および整形移行部θ3 の底面の中心線は、ロ−ル中心を
とおる垂直断面４から遠ざかるように、ロ−ル面にラセ
ン状に配置される。整形部θ4 の底面の中心線は上記平
面４と平行であり、ロ−ル面に円周の部分として配置さ
れる。When the position where the biting portion of each wedge-shaped protrusion starts is the position 0 at which the circumferential angle is zero with respect to the roll center axis 3 in the vertical section of the roll, as the circumferential angle increases, each wedge-shaped protrusion is Biting part θ 1 and widening part θ 2
And the center line of the bottom surface of the shaping transition part θ 3 is arranged in a spiral shape on the roll surface so as to be distant from the vertical section 4 passing through the center of the roll. The center line of the bottom surface of the shaping section θ 4 is parallel to the plane 4 and is arranged as a circumferential portion on the roll surface.
【００１３】 楔状突起の数、形状および配置は成形
された後の素材の形状に依存する。成形された後の素材
の形状が素材中心に関して対称な場合、各楔状突起は、
ロ−ル中心をとおる垂直断面４に関して、対称に配置さ
れる。したがって、楔状突起の個数が奇数のとき、ロ−
ル中央に位置する楔状突起の底面中心線は、ロ−ル中心
軸に対して９０゜をなし、その楔状突起の形状自体が面
対称性をもつ。The number, shape and arrangement of the wedge-shaped protrusions depend on the shape of the material after being formed. When the shape of the material after being formed is symmetrical with respect to the center of the material, each wedge-shaped protrusion is
They are arranged symmetrically with respect to the vertical section 4 passing through the center of the roll. Therefore, when the number of wedge-shaped protrusions is odd,
The center line of the bottom surface of the wedge-shaped protrusion located at the center of the roll forms 90 ° with respect to the center axis of the roll, and the shape itself of the wedge-shaped protrusion has plane symmetry.
【００１４】 ロ−ルダイスのロ−ル面１を平面に展
開したとき、楔状突起２ａの食い込み部θ1 、幅広げ部
θ2 、整形移行部θ3 および整形部θ4 の各底面の各中
心線は、加工進行中の素材の伸びに追随する楔状突起の
位置を表す曲線である。これは、各楔状突起２ｂ、２
ｃ、・・・についても同様である。When the roll surface 1 of the roll die is expanded to a flat surface, the center of each bottom surface of the wedge-shaped projection 2a is the biting portion θ 1 , the widening portion θ 2 , the shaping transition portion θ 3 and the shaping portion θ 4. The line is a curve that represents the position of the wedge-shaped protrusion that follows the elongation of the material during processing. This is for each wedge-shaped protrusion 2b, 2
The same applies to c, ....
【００１５】 各楔状突起の食い込み部θ1 は、ロ−
ル中心軸３を含む平面で切断したとき、底角一定の三角
形の断面を有し、円周角の増大につれ底角を一定に保ち
ながら底辺ｗ(イ) および高さｈ(イ) が漸増する。The biting portion θ 1 of each wedge-shaped protrusion is
When it is cut along a plane including the central axis 3, it has a triangular cross section with a constant base angle, and the base w (a) and height h (a) gradually increase while keeping the base angle constant as the circumference angle increases. To do.
【００１６】 各楔状突起の幅広げ部θ2 は、ロ−ル
中心軸３を含む平面で切断したとき、底角一定の台形の
断面であって、円周角の増大につれ底角および高さｈ
(ロ) を一定に保ちながら、底辺ｗ(ロ) および上辺ｓ(ロ)
が漸増する。整形移行部θ3 以降は、同一断面形状を保
持する。The widened portion θ 2 of each wedge-shaped projection has a trapezoidal cross section with a constant base angle when cut along a plane including the roll center axis 3, and the base angle and height increase as the circumferential angle increases. h
While keeping (b) constant, the bottom side w (b) and the top side s (b)
Gradually increases. The same cross-sectional shape is maintained after the shaping transition portion θ 3 .
【００１７】 各楔状突起とも円周角は３６０゜以内
に納まる。Each wedge-shaped protrusion has a circumferential angle within 360 °.
【００１８】（３）平板状ダイス上の一定部分に複数個
の楔状突起２ａ、２ｂ、２ｃ、・・・を有するダイスで
あって、各楔状突起が下記の特徴を有する平板状ダイ
ス。(3) A die having a plurality of wedge-shaped protrusions 2a, 2b, 2c, ... At a fixed portion on the plate-shaped die, each wedge-shaped protrusion having the following features.
【００１９】 各楔状突起は、食い込み部θ1 、幅広
げ部θ2 、整形移行部θ3 および整形部θ4 からなる。Each wedge-shaped protrusion comprises a biting portion θ 1 , a widening portion θ 2 , a shaping transition portion θ 3 and a shaping portion θ 4 .
【００２０】 各楔状突起の食い込み部が始まる位置
を平板上で素材軸方向３に垂直なｙ方向の原点の位置と
するとき、ｙ座標の増大につれ、各楔状突起とも上記
に記載した食い込み部θ1 、幅広げ部θ2 および整形移
行部θ3 の底面の中心線は、平板状ダイスの中心をとお
る素材軸方向に垂直な平面４から遠くなるように、斜め
に配置される。整形部θ4 の底面の中心線は上記平面４
と平行であり、かつ素材軸方向３と直角である。When the position where the wedged portion of each wedge-shaped projection starts is the position of the origin in the y direction perpendicular to the material axis direction 3 on the flat plate, as the y-coordinate increases, both wedge-shaped projections have the bite-in portion θ described above. 1 , the center lines of the bottom surfaces of the widened portion θ 2 and the shaping transition portion θ 3 are arranged obliquely so as to be distant from the plane 4 that is perpendicular to the material axis direction and that passes through the center of the flat plate die. The center line of the bottom of the shaping part θ 4 is the plane 4 above.
Is parallel to and is perpendicular to the material axis direction 3.
【００２１】 楔状突起の数、形状および配置は成形
された後の素材の形状に依存する。成形された後の素材
の形状が素材中心に関して対称な場合、各楔状突起は、
ロ−ル中心をとおる垂直断面４に関して、対称に配置さ
れる。したがって、楔状突起の個数が奇数のとき、ロ−
ル中央に位置する楔状突起の底面中心線は、ロ−ル中心
軸に対して９０゜をなし、その楔状突起の形状自体が面
対称性をもつ。The number, shape and arrangement of the wedge-shaped protrusions depend on the shape of the material after being formed. When the shape of the material after being formed is symmetrical with respect to the center of the material, each wedge-shaped protrusion is
They are arranged symmetrically with respect to the vertical section 4 passing through the center of the roll. Therefore, when the number of wedge-shaped protrusions is odd,
The center line of the bottom surface of the wedge-shaped protrusion located at the center of the roll forms 90 ° with respect to the center axis of the roll, and the shape itself of the wedge-shaped protrusion has plane symmetry.
【００２２】 楔状突起２ａの食い込み部θ1 、幅広
げ部θ2 、整形移行部θ3 および整形部θ4 の各底面の
各中心線は、加工進行中の素材の伸びに追随する楔状突
起の位置を表す曲線である。これは、各楔状突起２ｂ、
２ｃ、・・・についても同様である。The center lines of the bottoms of the biting portion θ 1 , the widening portion θ 2 , the shaping transition portion θ 3 and the shaping portion θ 4 of the wedge-shaped protrusion 2a are the wedge-shaped protrusions that follow the elongation of the material during the machining process. It is a curve showing a position. This is for each wedge-shaped protrusion 2b,
The same applies to 2c, ....
【００２３】 各楔状突起の食い込み部θ1 は、ロ−
ル中心軸３を含む平面で切断したとき、底角一定の三角
形の断面を有し、ｙ座標の増大につれ三角形の断面を有
し、円周角の増大につれ底角を一定に保ちながら底辺ｗ
(イ) および高さｈ(イ) が漸増する。The wedged portion θ 1 of each wedge-shaped protrusion is
When it is cut along a plane including the central axis 3, it has a triangular cross section with a constant base angle, has a triangular cross section as the y coordinate increases, and keeps the base w constant while keeping the base angle constant as the circumferential angle increases.
(B) and height h (b) gradually increase.
【００２４】 各楔状突起の幅広げ部θ2 は、ロ−ル
中心軸３を含む平面で切断したとき、底角一定の台形の
断面であって、ｙ座標の増大につれ底角および高さｈ
(ロ) を一定に保ちながら、底辺ｗ(ロ) および上辺ｓ(ロ)
が漸増する。整形移行部θ3 以降は、同一断面形状を保
持する。The widened portion θ 2 of each wedge-shaped projection has a trapezoidal cross section with a constant base angle when cut along a plane including the roll center axis 3, and the base angle and the height h increase as the y coordinate increases.
While keeping (b) constant, the bottom side w (b) and the top side s (b)
Gradually increases. The same cross-sectional shape is maintained after the shaping transition portion θ 3 .
【００２５】角度の呼び方として、「円周角」というと
き、位置０を基準にして測ったロ−ル中心軸に関する角
度をいい、「中心角」とは基準位置に関係なく中心軸か
らロ−ル面をみたロ−ル断面での角度をいう。また、楔
状突起の断面における「底角」とは、三角形の断面の場
合は底辺と他の二辺となす角をいい、一般にその二つの
角は異なる。台形の場合の「底角」は、底辺と側辺とな
す角をいい、この二つの角も一般に異なる。底辺は、ロ
−ル面と楔状突起が接する面を中心軸を含む平面で切断
した交線である。When the term "circumferential angle" is used to refer to the angle, it means the angle with respect to the center axis of the roll measured with reference to position 0. The "center angle" means the angle from the center axis regardless of the reference position. -It is the angle of the roll cross section when the roll surface is seen. The "bottom angle" in the cross section of the wedge-shaped projection is the angle between the base and the other two sides in the case of a triangular cross section, and the two angles are generally different. The "bottom angle" in the case of a trapezoid is the angle formed by the base and the side, and these two angles are also generally different. The bottom side is a line of intersection obtained by cutting a surface where the roll surface and the wedge-shaped projection are in contact with each other along a plane including the central axis.
【００２６】[0026]
【発明の実施の形態】以下において、六カ所を絞る場合
を例に、ダイスの具体的形状およびそれを用いた転造加
工方法を説明する。図１は六カ所を絞る場合のロ−ルダ
イスの楔状突起の形状をあらわす図面である。（ａ）は
ロ−ルダイスの楔状突起を前面から見た図面であり、後
記するように主として楔状突起がラセン状に配置された
部分を見ている。なお、ここで、「ラセン状」は、円筒
面上で中心軸と一定角をなす（一定周期をもつ）幾何学
上のラセン曲線をいうのではなく、それと近似した曲線
をいう。（ｂ）はロ−ルダイスを軸方向から見た図面で
ある。同図においてロ−ル基準径をＤとして表示してあ
る。図１（ａ）および（ｂ）において、楔状突起の高さ
を誇張して描いている。ロ−ル中心軸を含む面イ、ロお
よびハによって楔状突起を切断したときの様子を（ａ）
に併せて表す。BEST MODE FOR CARRYING OUT THE INVENTION A specific shape of a die and a rolling method using the die will be described below by taking the case of narrowing six places as an example. FIG. 1 is a drawing showing the shape of wedge-shaped protrusions of a roll die when narrowing down six places. (A) is a drawing of the wedge-shaped protrusions of the roll die as viewed from the front, and mainly sees the portion where the wedge-shaped protrusions are arranged in a spiral shape as described later. Here, the “helix shape” does not mean a geometric spiral curve forming a constant angle with the central axis (having a constant period) on a cylindrical surface, but a curve approximated to it. (B) is the drawing which looked at the roll die from the axial direction. In the figure, the roll reference diameter is shown as D. In FIGS. 1A and 1B, the height of the wedge-shaped projection is exaggeratedly drawn. The state when the wedge-shaped projection is cut by planes A, B, and C including the roll center axis (a)
In addition,
【００２７】図２は、楔状突起の、平面イ、ロおよびハ
による切断面を表す。本図においては、楔の高さは誇張
せず、したがって楔の断面形状を相似的に表す。同図に
おいてｗ（イ）、ｗ（ロ）、…は底面の幅を、ｈ
（イ）、ｈ（ロ）、…は突起の高さを、また、ｓ
（イ）、ｓ（ロ）、…は台形の上辺の長さを表す。ここ
で、食い込み部θ1 の円周角最大位置での高さは、その
後も一定に保たれる。高さが漸増するのは食い込み部θ
1 においてのみである。したがって、ｈ（ロ）＝ｈ
（ハ）であり、その値は食い込み部θ1 の円周角最大位
置での値と等しい。食い込み部では、円周角の増大につ
れ高さが漸増しながら三角形の二つの底角ともに各々一
定である。すなわち相似形を保ちながら、高さおよび底
辺が漸増する。楔状突起が左右対称な場合は、断面は二
等辺三角形になる。幅広げ部では、台形の二つの底角は
一定であり、前記したように高さも一定であるから、円
周角の増大につれ、台形の上辺と底辺を漸増させる。こ
の楔状突起も楔状突起が左右対称な場合は、断面は等辺
台形になる。通常は、楔状突起は左右対称であり、食い
込み部の断面形状は二等辺三角形であり、幅広げ部以降
の台形は等辺台形である。FIG. 2 shows cutting planes of the wedge-shaped projection by planes a, b and c. In this figure, the height of the wedge is not exaggerated and therefore the cross-sectional shape of the wedge is represented analogously. In the figure, w (a), w (b), ...
(A), h (b), ... are the heights of the protrusions, and s
(A), s (b), ... Represent the length of the upper side of the trapezoid. Here, the height of the biting portion θ 1 at the maximum circumferential angle position is kept constant thereafter. The height gradually increases at the biting part θ
Only in 1 . Therefore, h (b) = h
(C), which is equal to the value at the maximum circumferential angle position of the biting part θ 1 . At the biting portion, the height gradually increases as the circumferential angle increases, and the two base angles of the triangle are constant. That is, the height and the base gradually increase while maintaining the similar shape. When the wedge-shaped protrusions are symmetrical, the cross section becomes an isosceles triangle. In the widened portion, the two base angles of the trapezoid are constant, and the height is also constant as described above. Therefore, as the circumferential angle increases, the top and bottom sides of the trapezoid are gradually increased. In the case where the wedge-shaped protrusions are also symmetrical, the cross section becomes an isosceles trapezoid. Usually, the wedge-shaped protrusions are bilaterally symmetric, the cross-sectional shape of the biting part is an isosceles triangle, and the trapezoid after the widening part is an isosceles trapezoid.
【００２８】これに対して、図３は同じロ−ルダイスを
裏から見た図面である。（ａ）はロ−ル上の楔状突起を
裏から見た図であり、楔状突起が平面４と平行な部分を
表す。（ｂ）は同ロ−ルダイスを軸方向から見た図面で
ある。図４は図１および２に表すロ−ルダイスの楔状突
起の底面を含むロ−ル面を平面に展開した図である。On the other hand, FIG. 3 is a view of the same roll die seen from the back. (A) is a view of the wedge-shaped protrusion on the roll as seen from the back side, and shows the portion where the wedge-shaped protrusion is parallel to the plane 4. (B) is the drawing which looked at the same roll die from the axial direction. FIG. 4 is a plan view of the roll surface including the bottom surface of the wedge-shaped projection of the roll die shown in FIGS.
【００２９】楔の底面の輪郭線は、平面に展開したとき
は曲線になる。これは、楔底面の中心線についてもいえ
る。図４はロ−ルダイスのロ−ル面の展開図であるが、
一方これを平板状ダイスとして見ることも可能である。
平板はロ−ルの半径を大きくした極限のロ−ル面とみな
せるので、図４は平板状ダイスの平面図もしくは正面図
とみることができる。The contour line of the bottom surface of the wedge becomes a curved line when developed on a plane. This also applies to the center line of the bottom surface of the wedge. FIG. 4 is a development view of the roll surface of the roll die,
On the other hand, it can be viewed as a flat plate die.
Since the flat plate can be regarded as an ultimate roll surface with a large radius of the roll, FIG. 4 can be regarded as a plan view or a front view of the flat plate die.
【００３０】図５は同じ形状のロ−ルダイスを三個用い
て多段の段付き軸を加工する場合の素材５およびロ−ル
ダイスを軸方向から見た図面である。以下において、図
１〜５に基づいて、三つのロ−ルダイスにより六カ所を
絞る多段の段付き軸を加工する場合を説明する。FIG. 5 is a drawing in which the material 5 and the roll dies in the case of processing a multi-stepped shaft using three roll dies of the same shape are viewed from the axial direction. Hereinafter, a case of processing a multi-stepped shaft in which six rolls are narrowed by three roll dies will be described with reference to FIGS.
【００３１】図５において、三個の各ダイスは六カ所に
楔状突起を設けた同一形状を有しており、加工開始時は
三個のダイスの空隙は素材５が納まる広さである。六個
の楔状突起は全て、絞った体積を軸方向端部側へ押し出
す。図１に示すようにこれら楔状突起２ａ〜２ｆはいず
れも、食い込み部（中心角θ1 に対応する範囲：以下に
おいて「中心角」および「対応する範囲」を省略し、単
に「食い込み部θ1 」などという）、幅拡げ部θ2 、整
形移行部θ3 および整形部θ4 によって構成される。In FIG. 5, each of the three dies has the same shape with six wedge-shaped protrusions provided, and at the start of processing, the voids of the three dies are large enough to accommodate the material 5. All the six wedge-shaped protrusions push the squeezed volume toward the end in the axial direction. As shown in FIG. 1, these wedge-shaped projections 2a to 2f are all bite portions (range corresponding to the central angle θ 1 : in the following, the “central angle” and the “corresponding range” are omitted, and the “bite portion θ 1 ” is simply omitted. , Etc.), a width expanding portion θ 2 , a shaping transition portion θ 3 and a shaping portion θ 4 .
【００３２】加工が開始されると、三個のロ−ルダイス
はともに同じ方向に回転し、軸方向六カ所に設けた楔状
突起２ａ〜２ｆが素材に食い込みを開始する。楔状突起
の食い込み開始と同時に、直ちに素材は軸方向へ伸び始
める。中央に位置する楔２ｃ、２ｄは軸方向に、両者の
中心線の間隔を広げながら、加工中素材に対しては、一
貫して同じ位置で加工を行う。これら中央部の楔２ｃ、
２ｄの両側に位置する楔２ｂ、２ｅは各々楔２ｃ、２ｄ
の押し付けによる加工の進行に伴って生じる素材の伸び
量に応じて、ロ−ルの所定の回転により素材への押し付
け部分を端部側へずらしてゆく。ここに、「ロ−ルの所
定の回転」とは、本発明において絞り部の軸方向位置は
素材の回転角で決まるので、それに合わせてラセン状に
配置された楔をその軸方向位置で素材を押すようにする
ことをいう。When the processing is started, all the three roll dies rotate in the same direction, and the wedge-shaped projections 2a to 2f provided at six axial positions start to bite into the material. At the same time when the wedge-shaped protrusions start to bite, the material immediately begins to stretch in the axial direction. The wedges 2c and 2d located in the center perform processing at the same position consistently with respect to the material being processed while expanding the interval between the center lines of the wedges 2c and 2d in the axial direction. These central wedges 2c,
The wedges 2b and 2e located on both sides of 2d are wedges 2c and 2d, respectively.
Depending on the amount of elongation of the material that occurs with the progress of processing by pressing, the part pressed against the material is displaced toward the end side by a predetermined rotation of the roll. Here, the "predetermined rotation of the roll" means that the axial position of the throttle portion is determined by the rotation angle of the material in the present invention, and accordingly, the wedges arranged in a spiral shape are aligned at the axial position of the material. It means to press.
【００３３】さらにその外側に位置する楔２ａおよび２
ｆはそれぞれ楔２ｃ、２ｂおよび楔２ｄ、２ｅの押し付
けによって生じる素材の伸び量に応じて、ロ−ル回転に
より押し付け部分を端部側へずらす。素材の伸びに追随
した加工を可能とする仕組みは、図１に示すように、各
突起ごとの各部分ごとに底面中心線をラセン状とするこ
とにある。このラセン状に配置される部分は、いずれの
楔状突起とも、食い込み部θ1 、幅拡げ部θ2 および整
形移行部θ3 からなる。Further, wedges 2a and 2 located outside thereof
In accordance with the amount of elongation of the material caused by the pressing of the wedges 2c, 2b and the wedges 2d, 2e, f causes the pressing portion to be displaced toward the end side by the roll rotation. As shown in FIG. 1, the mechanism that enables the processing to follow the elongation of the material is to make the center line of the bottom face helical for each part of each protrusion. The portion arranged in the spiral shape is composed of a biting portion θ 1 , a widening portion θ 2 and a shaping transition portion θ 3 in any wedge-shaped projection.
【００３４】楔状突起２ａ、２ｂ、２ｅ、２ｆのある円
周角に対応する軸方向位置は、それまでにその楔状突起
よりもロ−ルダイス中心側に位置した楔状突起によって
絞られた素材体積とつり合う素材の伸び量で決まる位置
となる。それは円周角の増大につれロ−ル中心から遠ざ
かる曲線、すなわちラセン状となる。The axial position of the wedge-shaped projections 2a, 2b, 2e, 2f corresponding to a certain circumferential angle is the material volume squeezed by the wedge-shaped projections located closer to the center of the roll die than the wedge-shaped projections. The position is determined by the amount of stretching of the balancing material. It becomes a curve, that is, a helix, which moves away from the center of the roll as the circumferential angle increases.
【００３５】また、図１に示すように、いずれの楔の底
面中心線も一周期に満たない、すなわちロ−ルを一回り
回らない。Further, as shown in FIG. 1, the bottom center line of any wedge does not fill one cycle, that is, it does not go around the roll once.
【００３６】楔の断面形状が変化するのは、幅広げ部θ
2 の円周角最大位置までである。幅広げ部θ2 では、上
記したように、高さは一定のまま、台形の上辺と底辺が
漸増する。その後の整形移行部θ3 および整形部θ4 で
は、楔の断面形状は幅広げ部の円周角最大位置での形状
と同じである。The cross-sectional shape of the wedge changes because the widened portion θ
It is up to the maximum position of the circumferential angle of 2 . In the widened portion θ 2 , as described above, the top and bottom sides of the trapezoid gradually increase while the height remains constant. In the subsequent shaping transition portion θ 3 and shaping portion θ 4 , the cross-sectional shape of the wedge is the same as the shape of the widened portion at the maximum circumferential angle position.
【００３７】段付き形状は楔の整形移行部θ3 の終了時
点、すなわち円周角θ5 に対応する楔状突起位置におい
て軸対称に加工される。素材の伸びは、円周角θ5 に対
応する楔状突起の位置までで終了する。したがって、楔
２ａ、２ｂ、２ｅおよび２ｆの素材伸びに追随したズラ
し、すなわちロ−ルの回転に伴う軸方向への楔の押し付
けも、円周角θ5 に対応する突起位置で終了する。楔状
突起の押し付ける部分がラセン状でなくなることは、素
材の軸方向への伸びが完了したことを意味する。これ以
後は、従来法の整形部と同様に、六カ所の楔状突起は軸
方向にずれることなく同じ位置で素材と接触し、加工を
完了する。The stepped shape is machined axisymmetrically at the end of the shaping transition θ 3 of the wedge, that is, at the position of the wedge-shaped protrusion corresponding to the circumferential angle θ 5 . The elongation of the material ends up to the position of the wedge-shaped protrusion corresponding to the circumferential angle θ 5 . Therefore, the displacement of the wedges 2a, 2b, 2e and 2f following the material elongation, that is, the pressing of the wedge in the axial direction due to the rotation of the roll is also completed at the projection position corresponding to the circumferential angle θ 5 . The fact that the wedge-shaped projections are not helically shaped means that the material has been stretched in the axial direction. After this, like the conventional shaping section, the wedge-shaped projections at the six locations contact the material at the same position without shifting in the axial direction, and the processing is completed.
【００３８】成形する段の数、すなわち楔状突起の数は
奇数でもよく、この場合は中央の楔状突起のダイス中心
をふくむ軸方向断面４が対称面となり、その楔状突起は
いわゆる分水嶺となる。The number of steps to be formed, that is, the number of wedge-shaped projections may be an odd number. In this case, the axial cross section 4 including the center of the die of the central wedge-shaped projection is a symmetrical surface, and the wedge-shaped projection is a so-called watershed.
【００３９】以上の説明では、円周角のゼロ点を各楔状
突起について共通とした。しかし、本発明では各楔状突
起ごとに円周角のゼロ点を異なる位置にして、すなわち
食い込み部の開始を異なる時期にして、各楔状突起ごと
に独立して配置したロ−ルダイスとしてもよい。平板状
ダイスの場合は、これは図４において、各楔状突起が平
面４に平行にズレた、各楔状突起の食い込み部の開始位
置が軸方向３に平行な同一直線上にのらない配置とする
ことに対応する。このようなズレた配置は平板状ダイス
の場合であってもよい。In the above description, the zero point of the circumferential angle is common to the wedge-shaped projections. However, in the present invention, the zero point of the circumferential angle may be set to a different position for each wedge-shaped projection, that is, the start of the biting portion may be set to a different time, and the wedge-shaped projections may be independently arranged. In the case of a flat plate die, this means that the wedge-shaped protrusions are displaced from each other in parallel with the plane 4 in FIG. 4, and the starting position of the biting portion of each wedge-shaped protrusion is not on the same straight line parallel to the axial direction 3. Corresponding to what you do. Such a dislocated arrangement may be in the case of a flat plate die.
【００４０】また、各絞り部ごとに縮径率や細胴部長さ
が異なっても良い。これは、楔状突起の高さｈ(イ) など
や楔の幅ｗ(ロ) が各楔状突起ごとに異なってもよいこと
と同義である。Further, the diameter reduction ratio and the length of the thin barrel portion may be different for each throttle portion. This is synonymous with the height h (a) of the wedge-shaped projections and the width w (b) of the wedges may be different for each wedge-shaped projection.
【００４１】ここで説明した方法は三個のロ−ルダイス
を用いた方法であるが、本発明方法によれば、三個を超
えるロ−ルダイスを用いた多段の段付き軸成形も可能と
なり、それらの方法であってもよい。ただし、平板状ダ
イスの場合は二個のダイスで成形する場合に限られる。The method described here is a method using three roll dies, but according to the method of the present invention, multistage stepped shaft forming using more than three roll dies is possible, Those methods may be used. However, in the case of a flat plate die, it is limited to the case of molding with two dies.
【００４２】また、絞り部の間を増径する盛上げ加工の
場合も、素材の伸びに追随して加工を加えることに相違
はないので、盛上げ加工も本発明範囲に含まれる。Also, in the case of the build-up processing in which the diameter between the narrowed portions is increased, there is no difference in that the work is added following the elongation of the material, and therefore the build-up processing is also included in the scope of the present invention.
【００４３】これらのロ−ルダイスはＣｒ、Ｍｏ、Ｖ、
Ｗ等の一部または全部を含有した通常の工具鋼、もしく
は熱処理で調整した中高炭素鋼または高Ｃｒ鋼等により
製造される。通常、機械加工により製作されるが、鋳造
により製作されてもよい。鉄粉および合金粉末を焼結ま
たは加圧焼結することにより製造されたものでもよい。These roll dies are made of Cr, Mo, V,
It is manufactured from a normal tool steel containing a part or all of W or the like, or a medium-high carbon steel or a high Cr steel adjusted by heat treatment. Usually, it is manufactured by machining, but may be manufactured by casting. It may be produced by sintering or pressure-sintering iron powder and alloy powder.
【００４４】[0044]
【実施例】本発明の効果を調べるために、三つのロ−ル
ダイスを用いて六カ所に絞りを加えた実験を行った。素
材はφ８０ｍｍ×４００ｍｍ長さの炭素鋼丸棒を用い
た。EXAMPLE In order to investigate the effect of the present invention, an experiment was conducted in which three roll dies were used to squeeze in six places. The material used was a carbon steel round bar having a length of 80 mm x 400 mm.
【００４５】三個のロ−ルダイスのロ−ル基準径Ｄはφ
２８０ｍｍ、最大楔高さは１４ｍｍであり、ロ−ル回転
速度は５ｒｐｍとした。ロ−ルの食い込み部中心角（図
１（ｂ）のθ1 ）を８４．３゜、幅拡げ部中心角（図１
（ｂ）のθ2 ）を４３．３゜、整形移行部（図１（ｂ）
のθ3 ）および整形部（図１（ｂ）のθ4 ）を合わせた
角度を１８７．４゜とした。食い込み部θ1 の円周角最
大位置での高さは、その後も一定に保たれるようにし
た。食い込み部の楔状突起の断面形状は二等辺三角形と
した。また、断面形状が変化するのは、幅広げ部θ2 の
円周角最大位置までとした。幅広げ部の断面形状は等辺
台形とした。その後の整形移行部θ3 および整形部θ4
では、楔の断面形状は幅広げ部の円周角最大位置での形
状と同じである。The roll reference diameter D of the three roll dies is φ.
The maximum wedge height was 280 mm, and the roll rotation speed was 5 rpm. The central angle of the biting part of the roll (θ 1 in FIG. 1B) is 84.3 °, and the central angle of the widening part (FIG. 1).
Θ 2 of (b) is 43.3 °, and the shaping transition portion (Fig. 1 (b))
The angle obtained by combining θ 3 ) and the shaping portion (θ 4 in FIG. 1B) was set to 187.4 °. The height of the biting part θ 1 at the maximum circumferential angle position was kept constant thereafter. The cross-sectional shape of the wedge-shaped projection at the biting portion was an isosceles triangle. Further, the cross-sectional shape changed only up to the maximum circumferential angle position of the widened portion θ 2 . The cross-sectional shape of the widened portion was an isosceles trapezoid. After that, the shaping transition portion θ 3 and the shaping portion θ 4
Then, the cross-sectional shape of the wedge is the same as the shape of the widened portion at the maximum circumferential angle position.
【００４６】絞り部において六カ所の絞り部は全てφ５
２ｍｍ×２０ｍｍ長さ（テ−パ面角２０゜）に縮径し
た。他の諸元は、非加工部外径＝φ８０ｍｍ、設計全長
＝６１２．０１ｍｍ（伸び量２１２．０１ｍｍ）、絞り
部の間のφ８０ｍｍ部長さ＝５．０ｍｍ共通とした。All of the six throttle parts have a diameter of φ5.
The diameter was reduced to a length of 2 mm × 20 mm (taper surface angle of 20 °). Other specifications were that the outer diameter of the non-processed portion was 80 mm, the design total length was 612.01 mm (extension amount 212.01 mm), and the length between the narrowed portions was 80 mm and the length was 5.0 mm.
【００４７】（イ）従来法によるロ−ルダイスおよび能
率との比較 従来法は、中央側の楔から順に、（２ｃ、２ｄ）→（２
ｂ、２ｅ）→（２ａ、２ｆ）の三段階の加工を繰り返す
必要がある。同一ロ−ルダイス上でこれら三段階の加工
を加えるには、ロ−ル基準径は大きくなる。表２は、本
発明法と従来法のロ−ルダイスおよび加工完了までに要
する素材の総回転数を比較した表である。従来法では必
要なロ−ル基準径は大きくなり、ロ−ルダイス費用はか
さむ。また、三ロ−ル方式で行えないために、加工完了
までに要する素材の総回転数は三ロ−ル方式の本発明法
に比較して、二倍以上となる。加工の能率は、ほぼこの
比率に逆比例する。(A) Comparison with Roll Die and Efficiency by Conventional Method In the conventional method, (2c, 2d) → (2
It is necessary to repeat the three-step processing of (b, 2e) → (2a, 2f). In order to perform these three steps of processing on the same roll die, the roll reference diameter becomes large. Table 2 is a table comparing the total number of revolutions of the roll die of the present invention method and the conventional method and the material required for completion of processing. In the conventional method, the required roll standard diameter is large, and the roll die cost is high. Further, since the three-roll method cannot be used, the total number of revolutions of the material required for the completion of processing is twice or more as compared with the method of the present invention of the three-roll method. The processing efficiency is almost inversely proportional to this ratio.
【００４８】[0048]
【表１】 [Table 1]
【００４９】（ロ）本発明法による加工 十本の試験を行った結果、いずれもくびれや盛り上がり
等の欠陥を生ずることなく成形を完了した。表２は、加
工後の素材全長および全体の伸び量を示す一覧表であ
る。表２に示すように、素材全体の伸び量は、十本とも
設計値に対して±２．０％以内（設計伸び量(L1-L0) ２
１２．０１ｍｍに対して±４．２４ｍｍ、すなわち、２
０７．８〜２１６．３ｍｍ）に収まっており、安定して
所定形状が得られる。本発明方法により素材径の３．５
倍程度の径のロ−ルによって充分に多段の段付き軸の成
形が可能であることが確認された。(B) Processing by the method of the present invention As a result of performing a test of ten pieces, molding was completed without any defects such as constrictions and bulges. Table 2 is a list showing the total length of the material after processing and the total amount of elongation. As shown in Table 2, the elongation of the entire material is within ± 2.0% of the design value (design elongation (L 1 -L 0 ) 2
± 4.24 mm with respect to 12.01 mm, that is, 2
(07.8 to 216.3 mm), a predetermined shape can be stably obtained. According to the method of the present invention, the material diameter is 3.5
It was confirmed that a multi-stepped shaft can be formed sufficiently by using a roll having a diameter of about double.
【００５０】[0050]
【表２】 [Table 2]
【００５１】[0051]
【発明の効果】本発明により、多段の段付き軸を短いダ
イス長で成形でき、工具費あるいは設備費の大幅な削減
が可能となる。さらには、三個以上のロ−ルダイスによ
る多段の段付き軸成形が可能となり、この種の中間製品
の成否を左右する大量生産の能率向上に益するところが
きわめて大きい。According to the present invention, a multi-stepped shaft can be formed with a short die length, and the tool cost or equipment cost can be significantly reduced. Furthermore, it becomes possible to form a multi-staged stepped shaft by using three or more roll dies, which greatly contributes to the improvement of the mass production efficiency that determines the success or failure of this type of intermediate product.
【図１】図１は六カ所を絞る場合のロ−ルダイスの楔状
突起の形状をあらわす図面である。（ａ）はロ−ルダイ
スの楔状突起を前面から見た図面である。（ｂ）はロ−
ルダイスを軸方向から見た図面である。FIG. 1 is a view showing a shape of a wedge-shaped protrusion of a roll die when squeezing at six places. (A) is the drawing which looked at the wedge-shaped protrusion of a roll die from the front. (B) is low
It is the drawing which looked at Redis from the axial direction.
【図２】図２は、楔状突起の、平面イ、ロおよびハによ
る切断面を表す。FIG. 2 is a sectional view of a wedge-shaped projection taken along planes a, b, and c.
【図３】図３は図１に示すロ−ルダイスを裏から見た図
面である。（ａ）は整形部の楔状突起を示す図面であ
る。（ｂ）はロ−ルダイスを軸方向から見た図面であ
る。FIG. 3 is a drawing of the roll die shown in FIG. 1 as viewed from the back. (A) is drawing which shows the wedge-shaped protrusion of a shaping part. (B) is the drawing which looked at the roll die from the axial direction.
【図４】図４は各楔状突起の底面をふくむロ−ル面の展
開図である。図３は、また、平板状ダイスの平面図ある
いは正面図をあらわす。FIG. 4 is a development view of a roll surface including a bottom surface of each wedge-shaped projection. FIG. 3 also shows a plan view or a front view of the flat plate die.
【図５】図５は同じロ−ルダイスを三個用いて多段の段
付き軸を加工する場合の素材およびロ−ルダイスを軸方
向から見た図面である。FIG. 5 is a drawing of a material and a roll die when the multi-staged shaft is machined by using three same roll dies as seen from the axial direction.
１…ロ−ル面、２、２ａ〜２ｆ…楔状突起、３…ロ−ル
中心軸、４…ロ−ル中心をふくむ中心軸に垂直な平面、
５…素材、θ1 …楔状突起の食い込み部の中心角、θ2
…幅拡げ部の中心角、θ3 …整形移行部部の中心角、θ
4 …整形部の中心角、θ5 …楔のラセン状配置が終了す
る位置の円周角、、ｈ(イ) …食い込み部の楔高さ、ｈ
(ロ) …幅拡げ部の楔高さ、ｈ(ハ) …整形部の楔高さ、ｗ
(イ) …食い込み部の楔の底面の幅、ｗ(ロ) …幅拡げ部の
楔の底面の幅、ｗ(ハ) …整形部の楔の底面の幅、ｓ
（ロ）…幅広げ部の上辺の幅、ｓ（ハ）…整形部の楔の
上辺の幅、λ1 、λ2 、λ3 、λ4 …ロ−ル上の楔の底
面中心線1 ... Roll surface, 2, 2a to 2f ... Wedge-shaped projections, 3 ... Roll center axis, 4 ... Plane perpendicular to the center axis including the roll center,
5 ... Material, θ 1 ... Central angle of wedge-shaped protrusion biting, θ 2
… Center angle of widened part, θ 3 … Center angle of shaping transition part, θ
4 ... central angle of the shaping part, θ 5 ... circumferential angle of the position where the wedge-shaped arrangement of the wedge ends, h (b) ... wedge height of the biting part, h
(B) ... wedge height of widened part, h (c) ... wedge height of shaping part, w
(A) ... the width of the bottom of the wedge of the biting part, w (b) ... the width of the bottom of the wedge of the widening part, w (c) ... the width of the bottom of the wedge of the shaping part, s
(B) ... Width of the upper side of the widening part, s (c) ... Width of the upper side of the wedge of the shaping part, λ 1 , λ 2 , λ 3 , λ 4 ... Center line of the bottom surface of the wedge on the roll
Claims (3)
て、加工進行中の素材の伸びに追随して素材に加工を付
与した後、素材の軸方向への伸びが停止した後素材を仕
上げ加工することを特徴とする転造加工方法。1. In a rolling process for forming a multi-stepped shaft, after the material is processed in accordance with the elongation of the material that is being machined, the material is processed after the elongation of the material in the axial direction is stopped. A rolling method characterized by finishing.
分に複数個の楔状突起（２ａ、２ｂ、２ｃ、…）を有す
るロ−ルダイスであって、各楔状突起が下記の特徴を有
するロ−ルダイス。 各楔状突起は、食い込み部（θ1 ）、幅広げ部（θ
2 ）、整形移行部（θ3）および整形部（θ4 ）からな
る。 各楔状突起の食い込み部が始まる位置を、ロ−ル垂
直断面でロ−ル中心軸（３）に関して円周角ゼロの位置
（０）とするとき、円周角の増大につれ、各楔状突起と
も上記に記載した食い込み部（θ1 ）、幅広げ部（θ
2 ）および整形移行部（θ3 ）の底面の中心線は、ロ−
ル中心をとおる垂直断面（４）から遠ざかるように、ロ
−ル面にラセン状に配置される。整形部（θ4 ）の底面
の中心線は上記平面（４）と平行であり、ロ−ル面に円
周の部分として配置される。 楔状突起の数、形状および配置は成形された後の素
材の形状に依存する。成形された後の素材の形状が素材
中心に関して対称な場合、各楔状突起は、ロ−ル中心を
とおる垂直断面（４）に関して、対称に配置される。し
たがって、楔状突起の個数が奇数のとき、ロ−ル中央に
位置する楔状突起の底面中心線は、ロ−ル中心軸に対し
て９０゜をなし、その楔状突起の形状自体が面対称性を
もつ。 ロ−ルダイスのロ−ル面（１）を平面に展開したと
き、楔状突起（２ａ）の食い込み部（θ1 ）、幅広げ部
（θ2 ）、整形移行部（θ3 ）および整形部（θ4 ）の
各底面の各中心線は、加工進行中の素材の伸びに追随す
る楔状突起の位置を表す曲線である。これは、各楔状突
起２ｂ、２ｃ、・・・についても同様である。 各楔状突起の食い込み部（θ1 ）は、ロ−ル中心軸
（３）を含む平面で切断したとき、底角一定の三角形の
断面を有し、円周角の増大につれ底角を一定に保ちなが
ら底辺（ｗ(イ) ）および高さ（ｈ(イ) ）が漸増する。 各楔状突起の幅広げ部（θ2 ）は、ロ−ル中心軸
（３）を含む平面で切断したとき、底角一定の台形の断
面であって、円周角の増大につれ底角および高さ（ｈ
(ロ) ）を一定に保ちながら、底辺（ｗ(ロ) ）および上辺
（ｓ(ロ) ）が漸増する。整形移行部（θ3 ）以降は、同
一断面形状を保持する。 各楔状突起とも円周角は３６０゜以内に納まる。2. A roll die having a plurality of wedge-shaped projections (2a, 2b, 2c, ...) At a certain portion on the roll surface (1) of the roll die, each wedge-shaped projection being as follows: Roll die with characteristics. Each wedge-shaped protrusion has a biting portion (θ 1 ) and a widened portion (θ 1
2 ), a shaping transition section (θ 3 ) and a shaping section (θ 4 ). When the position where the biting portion of each wedge-shaped protrusion starts is the position (0) at which the circumferential angle is zero with respect to the roll center axis (3) in the vertical section of the roll, as the circumferential angle increases, each wedge-shaped protrusion also The biting part (θ 1 ) and the widening part (θ
2 ) and the center line of the bottom of the shaping transition (θ 3 )
They are arranged helically on the roll surface, away from the vertical section (4) passing through the center of the roll. The center line of the bottom surface of the shaping section (θ 4 ) is parallel to the plane (4) and is arranged as a circumferential portion on the roll surface. The number, shape and arrangement of the wedge-shaped protrusions depend on the shape of the material after being formed. If the shape of the material after being formed is symmetrical with respect to the material center, the wedge-shaped protrusions are arranged symmetrically with respect to a vertical section (4) passing through the center of the roll. Therefore, when the number of wedge-shaped projections is odd, the center line of the bottom surface of the wedge-shaped projection located at the center of the roll forms 90 ° with respect to the center axis of the roll, and the shape of the wedge-shaped projection itself has plane symmetry. Hold. B - Rudaisu of Russia - when deployed Le surface (1) in the plane, biting portion of the wedge-shaped projections (2a) (theta 1), widening section (theta 2), shaping the transition portion (theta 3) and shaping unit ( Each center line of each bottom surface of θ 4 ) is a curve representing the position of the wedge-shaped protrusion that follows the elongation of the material during the processing. This is the same for each wedge-shaped projection 2b, 2c, .... The cut-in portion (θ 1 ) of each wedge-shaped protrusion has a triangular cross section with a constant base angle when cut along a plane including the roll center axis (3), and the base angle becomes constant as the circumferential angle increases. The base (w (i)) and height (h (i)) gradually increase while maintaining. The widened portion (θ 2 ) of each wedge-shaped protrusion has a trapezoidal cross section with a constant base angle when cut along a plane including the roll center axis (3), and the base angle and height increase as the circumferential angle increases. Sa (h
(B)) is kept constant, the base (w (b)) and top (s (b)) gradually increase. After the shaping transition portion (θ 3 ), the same sectional shape is maintained. The circumferential angle of each wedge-shaped protrusion is within 360 °.
突起（２ａ、２ｂ、２ｃ、・・・）を有するダイスであ
って、各楔状突起が下記の特徴を有する平板状ダイス。 各楔状突起は、食い込み部（θ1 ）、幅広げ部（θ
2 ）、整形移行部（θ3）および整形部（θ4 ）からな
る。 各楔状突起の食い込み部が始まる位置を平板上で素
材軸方向（３）に垂直なｙ方向の原点の位置とすると
き、ｙ座標の増大につれ、各楔状突起とも上記に記載
した食い込み部（θ1 ）、幅広げ部（θ2 ）および整形
移行部（θ3 ）の底面の中心線は、平板状ダイスの中心
をとおる素材軸方向に垂直な平面（４）から遠くなるよ
うに、斜めに配置される。整形部（θ4 ）の底面の中心
線は上記平面（４）と平行であり、かつ素材軸方向
（３）と直角である。 楔状突起の数、形状および配置は成形された後の素
材の形状に依存する。成形された後の素材の形状が素材
中心に関して対称な場合、各楔状突起は、ロ−ル中心を
とおる垂直断面（４）に関して、対称に配置される。し
たがって、楔状突起の個数が奇数のとき、ロ−ル中央に
位置する楔状突起の底面中心線は、ロ−ル中心軸に対し
て９０゜をなし、その楔状突起の形状自体が面対称性を
もつ。 楔状突起（２ａ）の食い込み部（θ1 ）、幅広げ部
（θ2 ）、整形移行部（θ3 ）および整形部（θ4 ）の
各底面の各中心線は、加工進行中の素材の伸びに追随す
る楔状突起の位置を表す曲線である。これは、各楔状突
起２ｂ、２ｃ、・・・についても同様である。 各楔状突起の食い込み部（θ1 ）は、ロ−ル中心軸
（３）を含む平面で切断したとき、底角一定の三角形の
断面を有し、ｙ座標の増大につれ三角形の断面を有し、
円周角の増大につれ底角を一定に保ちながら底辺（ｗ
(イ) ）および高さ（ｈ(イ) ）が漸増する。 各楔状突起の幅広げ部（θ2 ）は、ロ−ル中心軸
（３）を含む平面で切断したとき、底角一定の台形の断
面であって、ｙ座標の増大につれ底角および高さ（ｈ
(ロ) ）を一定に保ちながら、底辺（ｗ(ロ) ）および上辺
（ｓ(ロ) ）が漸増する。整形移行部（θ3 ）以降は、同
一断面形状を保持する。3. A flat die having a plurality of wedge-shaped projections (2a, 2b, 2c, ...) At a certain portion on the flat-plate die, each wedge-shaped projection having the following features. Each wedge-shaped protrusion has a biting portion (θ 1 ) and a widened portion (θ 1
2 ), a shaping transition section (θ 3 ) and a shaping section (θ 4 ). When the starting position of the wedged portion of each wedge-shaped projection is the origin of the y-direction perpendicular to the material axis direction (3) on the flat plate, the wedge-shaped projection (θ 1 ), the center line of the bottom of the widening part (θ 2 ) and the shaping transition part (θ 3 ) is slanted away from the plane (4) passing through the center of the flat plate die and perpendicular to the material axis direction. Will be placed. The center line of the bottom surface of the shaping part (θ 4 ) is parallel to the plane (4) and is perpendicular to the material axial direction (3). The number, shape and arrangement of the wedge-shaped protrusions depend on the shape of the material after being formed. If the shape of the material after being formed is symmetrical with respect to the material center, the wedge-shaped protrusions are arranged symmetrically with respect to a vertical section (4) passing through the center of the roll. Therefore, when the number of wedge-shaped projections is odd, the center line of the bottom surface of the wedge-shaped projection located at the center of the roll forms 90 ° with respect to the center axis of the roll, and the shape of the wedge-shaped projection itself has plane symmetry. Hold. The center lines of the bottoms of the wedge-shaped protrusion (2a) of the biting part (θ 1 ), the widening part (θ 2 ), the shaping transition part (θ 3 ) and the shaping part (θ 4 ) are It is a curve showing the position of the wedge-shaped projection that follows the elongation. This is the same for each wedge-shaped projection 2b, 2c, .... The wedged portion (θ 1 ) of each wedge-shaped protrusion has a triangular cross section with a constant base angle when cut along a plane including the roll center axis (3), and has a triangular cross section as the y coordinate increases. ,
As the circumferential angle increases, the bottom angle remains constant (w
(A)) and height (h (a)) gradually increase. The widened portion (θ 2 ) of each wedge-shaped projection has a trapezoidal cross section with a constant base angle when cut along a plane including the roll center axis (3), and the base angle and height increase as the y coordinate increases. (H
(B)) is kept constant, the base (w (b)) and top (s (b)) gradually increase. The same cross-sectional shape is maintained after the shaping transition portion (θ 3 ).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25126595A JPH0994629A (en) | 1995-09-28 | 1995-09-28 | Form-rolling method and die for form-rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25126595A JPH0994629A (en) | 1995-09-28 | 1995-09-28 | Form-rolling method and die for form-rolling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0994629A true JPH0994629A (en) | 1997-04-08 |
Family
ID=17220218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25126595A Pending JPH0994629A (en) | 1995-09-28 | 1995-09-28 | Form-rolling method and die for form-rolling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0994629A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5739685A (en) * | 1994-06-23 | 1998-04-14 | Sumitomo Metal Industries Limited | Method and apparatus for flaw detection by leakage fluexes and leakage flux sensor |
| US5747988A (en) * | 1994-06-23 | 1998-05-05 | Sumitomo Metal Industires Limited | Method and apparatus for flaw detection by leakage fluxes and leakage flux sensor |
| CN100435999C (en) * | 2006-12-12 | 2008-11-26 | 北京科技大学 | Multi-wedge synchronizing smooth butte rolling method for rolling same diameter axle type pieces by cross wedge rolling |
| CN108144965A (en) * | 2018-01-04 | 2018-06-12 | 湖州中杭轧辊有限公司 | A kind of roll and production technology suitable for cross-wedge-rolling shaft part |
-
1995
- 1995-09-28 JP JP25126595A patent/JPH0994629A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5739685A (en) * | 1994-06-23 | 1998-04-14 | Sumitomo Metal Industries Limited | Method and apparatus for flaw detection by leakage fluexes and leakage flux sensor |
| US5747988A (en) * | 1994-06-23 | 1998-05-05 | Sumitomo Metal Industires Limited | Method and apparatus for flaw detection by leakage fluxes and leakage flux sensor |
| CN100435999C (en) * | 2006-12-12 | 2008-11-26 | 北京科技大学 | Multi-wedge synchronizing smooth butte rolling method for rolling same diameter axle type pieces by cross wedge rolling |
| CN108144965A (en) * | 2018-01-04 | 2018-06-12 | 湖州中杭轧辊有限公司 | A kind of roll and production technology suitable for cross-wedge-rolling shaft part |
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