JPH11267785A - Manufacture of screw shaft - Google Patents
Manufacture of screw shaftInfo
- Publication number
- JPH11267785A JPH11267785A JP7390098A JP7390098A JPH11267785A JP H11267785 A JPH11267785 A JP H11267785A JP 7390098 A JP7390098 A JP 7390098A JP 7390098 A JP7390098 A JP 7390098A JP H11267785 A JPH11267785 A JP H11267785A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- length
- thread
- screw shaft
- rolling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Transmission Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、スルー転造成形に
よるねじ軸の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a screw shaft by through rolling.
【０００２】[0002]
【従来の技術】ねじを加工成形する場合、切削加工のほ
かに転造加工があるが、生産性や強度の面で転造加工が
優れている。ねじの転造加工にはインフィード転造とス
ルー転造があるが、ボールねじ等の長尺のねじ軸を転造
成形する場合、素材のねじ加工する部分の長さより短い
幅のダイスで順次成形していくスルー転造加工が採用さ
れている。2. Description of the Related Art When forming a screw, there is rolling in addition to cutting, but rolling is excellent in terms of productivity and strength. There are two types of thread rolling: in-feed rolling and through-rolling.When rolling a long screw shaft such as a ball screw, use a die with a width shorter than the length of the threaded part of the material. A through-rolling process for forming is employed.
【０００３】スルー転造方法は、短い幅のダイスで成形
できるので転造荷重が少なく、加工物の曲がりが少ない
ので寸法精度の安定したねじ軸が小型の設備で成形でき
る。In the through-rolling method, since the roll can be formed with a short width die, the rolling load is small, and the bending of the workpiece is small, so that a screw shaft with stable dimensional accuracy can be formed with a small facility.
【０００４】[0004]
【発明が解決しようとする課題】ねじ軸をスルー転造成
形する場合、棒状素材の転造開始部分と転造終了部分に
おいて２個のロールダイスの接近または離反動作があ
り、ロールダイス形状、ロールダイスのねじれ角度など
により不完全ねじ部が生じてしまう。When a threaded shaft is subjected to through-roll forming, two roll dies approach or separate from each other at a rolling start portion and a rolling end portion of a rod-shaped material. An incomplete thread portion is generated due to the twist angle of the die and the like.
【０００５】不完全ねじ部は、有効ねじ部に比べ径が大
きく、棒状素材の端部にかけて転造成形しても端部に形
成された不完全ねじ部によりナットの螺合に支障を生じ
たり、ボールねじの場合に内周ねじ溝にボールが挿入さ
れたナットスクリューにねじ軸が円滑に螺入できないな
ど、ねじ伝動機構の組付性が悪く生産性の向上を妨げて
いた。[0005] The incompletely threaded portion has a larger diameter than the effective threaded portion, and even if it is roll-formed over the end of the rod-shaped material, the incompletely threaded portion formed at the end may hinder the screwing of the nut. In the case of a ball screw, the screw shaft cannot be smoothly screwed into a nut screw in which a ball is inserted into an inner peripheral thread groove.
【０００６】本発明は、かかる点に鑑みなされたもの
で、その目的とする処は、スルー転造によるねじ軸への
ナットの組み込みが容易でねじ伝動機構の生産性の向上
を図ることができるねじ軸の製造方法を供する点にあ
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. It is an object of the present invention to easily incorporate a nut into a screw shaft by through-rolling and to improve the productivity of a screw transmission mechanism. The present invention provides a method of manufacturing a screw shaft.
【０００７】[0007]
【課題を解決するための手段および作用効果】上記目的
を達成するために、本発明は、棒状素材の一側部に端部
から所定ねじ部長さよりも長くねじ部をスルー転造し、
転造されたねじ部の端部を切断して所定ねじ部長さのね
じ部を形成するねじ軸の製造方法とした。In order to achieve the above object, according to the present invention, a threaded portion of one side of a rod-shaped material is formed from an end to a threaded portion having a length longer than a predetermined threaded length,
A method of manufacturing a screw shaft in which an end of a rolled thread is cut to form a thread having a predetermined thread length.
【０００８】スルー転造により成形されたねじ部は、そ
の両端に不完全ねじ部が形成されているが、棒状素材の
端部に形成された不完全ねじ部を切断することにより有
効ねじ部が端部に形成されることになる。The thread formed by through-rolling has imperfect threads at both ends, but the effective thread is formed by cutting the imperfect threads formed at the ends of the rod-shaped material. It will be formed at the end.
【０００９】予め所定ねじ部長さよりも長くねじ部をス
ルー転造しているので、端部を切断しても所定ねじ部長
さは確保される。したがって製造されたねじ軸は端部の
有効ねじ部をナットに容易に螺入することができ、ねじ
伝動機構の組付性が良く生産性の向上を図ることができ
る。[0009] Since the thread portion is previously rolled longer than the predetermined thread portion length, the predetermined thread portion length is secured even if the end is cut. Therefore, the manufactured screw shaft can easily screw the effective screw portion at the end into the nut, and the assembling property of the screw transmission mechanism is good and the productivity can be improved.
【００１０】請求項２記載の発明は、一側部にラック部
が形成される棒状素材の他側部に端部から所定ねじ部長
さよりも長くねじ部をスルー転造し、転造されたねじ部
の端部を切断して所定ねじ部長さのねじ部を形成して電
動パワーステアリング用ねじ軸を製造するねじ軸の製造
方法である。According to a second aspect of the present invention, there is provided a rod-shaped material in which a rack is formed on one side, and a threaded portion which is longer than a predetermined threaded portion length is rolled from the end to the other side of the rod-shaped material. This is a method of manufacturing a screw shaft for manufacturing a screw shaft for electric power steering by cutting an end of a portion to form a screw portion having a predetermined screw portion length.
【００１１】電動パワーステアリング用ねじ軸は、ステ
アリングシャフトの端部のピニオンが噛合するラック部
が一側部に形成され、パワーアシストするボールねじ機
構が構成されるねじ部が他側部に形成される。The screw shaft for electric power steering has a rack portion on one side where a pinion at the end of the steering shaft meshes, and a screw portion forming a ball screw mechanism for power assist is formed on the other side. You.
【００１２】一側部にラック部が形成される棒状素材の
他側部をスルー転造し、その端部の不完全ねじ部を切断
するので、ねじ軸は端部の有効ねじ部を内周ねじ溝にボ
ールが挿入されたナットスクリューに容易に螺入するこ
とができ、ねじ伝動機構の組付性が良く電動パワーステ
アリング用ねじの生産性の向上を図ることができる。Since the other side of the bar-shaped material having a rack formed on one side is through-rolled and the incomplete thread at the end is cut off, the screw shaft has an effective thread at the end on the inner periphery. The nut can be easily screwed into the nut screw in which the ball is inserted into the thread groove, and the assemblability of the screw transmission mechanism is good, and the productivity of the screw for electric power steering can be improved.
【００１３】請求項３記載の発明は、請求項２記載のね
じ軸の製造方法において、前記所定ねじ部長さが、転造
されたねじ部の両端にできる不完全ねじ部のうち内側の
不完全ねじ部の長さを前記ラック部の長さに加えた長さ
と略等しくしたことを特徴とする。According to a third aspect of the present invention, in the method for manufacturing a screw shaft according to the second aspect, the predetermined thread portion length is such that the inside imperfect portion of the imperfect thread portion formed at both ends of the rolled thread portion. The length of the screw portion is substantially equal to the length obtained by adding the length of the rack portion.
【００１４】端部の不完全ねじ部を切断して残った所定
ねじ部のうち有効ねじ部の長さは、ラック部の長さと略
等しく、ラック部の作動範囲内で常に有効ねじ部にナッ
トスクリューを螺合させてボールねじ機構を円滑に作動
させることができる。The length of the effective thread of the predetermined thread remaining after cutting off the incomplete thread at the end is substantially equal to the length of the rack, and the nut is always attached to the effective thread within the working range of the rack. The ball screw mechanism can be smoothly operated by screwing the screws.
【００１５】請求項４記載の発明は、請求項１または請
求項２記載のねじ軸の製造方法において、前記転造され
たねじ部の端部の切断する長さを少なくとも転造用ロー
ルダイスの幅長の半分としたことを特徴とする。According to a fourth aspect of the present invention, in the method for manufacturing a screw shaft according to the first or second aspect, the cut length of the end of the rolled screw portion is at least the length of the roll die for rolling. It is characterized in that the width is set to half.
【００１６】転造用ロールダイスは、幅方向の中央部分
のねじ径が一定でストレート部をなし、同ストレート部
の両側は、転造加工時の磨耗を減らすため、ねじ径が先
端に行くほど徐々に小さくなるテーパ部を形成してい
る。The roll die for rolling has a straight portion with a constant thread diameter at the center in the width direction, and the both sides of the straight portion have a smaller diameter toward the tip in order to reduce abrasion during rolling. A tapered portion that gradually decreases is formed.
【００１７】転造されたねじ部の端部の切断する長さを
少なくとも転造用ロールダイスの幅長の半分とすること
で、転造用ロールダイスの一方のテーパ部で加工された
不完全ねじ部を切断して有効ねじ部をねじ軸の端部に形
成することができる。[0017] By setting the cut length of the end portion of the rolled screw portion to at least half of the width of the roll die for rolling, the imperfect portion formed by one tapered portion of the roll die for rolling is formed. The effective thread can be formed at the end of the threaded shaft by cutting the thread.
【００１８】[0018]
【発明の実施の形態】以下本発明に係る一実施の形態に
ついて図１ないし図４に図示し説明する。本実施の形態
に係るねじ軸の製造方法は、電動パワーステアリング用
のラックねじ軸の製造方法である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment according to the present invention will be described with reference to FIGS. The method for manufacturing a screw shaft according to the present embodiment is a method for manufacturing a rack screw shaft for electric power steering.
【００１９】図１の，，，に棒状素材Ｓ1 から
各製造過程のラックねじ軸Ｓ2 ，Ｓ 3 ，Ｓ4 を順に図示
している。なお図１は、製造されたラックねじ軸Ｓ4
にナットスクリューＮを螺合した状態を示す図である。In FIG.1From
Rack screw shaft S in each manufacturing processTwo, S Three, SFourIllustrated in order
doing. FIG. 1 shows the manufactured rack screw shaft SFour
FIG. 5 is a view showing a state in which a nut screw N is screwed into the nut.
【００２０】まず棒状素材Ｓ1 は、予め後の切断を考慮
して長めに設定された丸棒であり、丸棒の一側部に既に
ラック部１が形成されものを用いる（図１参照）。こ
の棒状素材Ｓ1 のラック部１と反対側にねじ部２を成形
すべくスルー転造装置により転造加工される。First, the bar-shaped material S 1 is a round bar which is set to be long in advance in consideration of later cutting, and has a rack portion 1 formed on one side of the round bar (see FIG. 1). . It is rolling by through-rolling device in order to mold the threaded portion 2 on the opposite side of the rack portion 1 of the rod-shaped material S 1.
【００２１】図２を参照して該棒状素材Ｓ1 はガイドブ
ッシュ12，13に回転自在に支持され、そのガイドブッシ
ュ12，13間で転造用ロールダイス10，11が回転しながら
棒状素材Ｓ1 を挟圧する。Referring to FIG. 2, the rod-shaped material S 1 is rotatably supported by guide bushes 12, 13, and the rolling dies 10, 11 rotate between the guide bushes 12, 13 while the rod-shaped material S 1 is rotated. Press 1
【００２２】一方の転造用ロールダイス10は、位置が固
定されており、他方の転造用ロールダイス11が油圧によ
り固定側の転造用ロールダイス10に近づき、棒状素材Ｓ
1 をを挟み押圧する。The position of one of the roll dies 10 is fixed, and the other roll dies 11 approach the fixed roll dies 10 by hydraulic pressure, and the rod-shaped material S is formed.
1 is sandwiched and pressed.
【００２３】転造用ロールダイス10は、幅方向の中央部
分のねじ径が一定でストレート部10ａをなし、同ストレ
ート部10ａの両側は、転造加工時の磨耗を減らすため、
ねじ径が先端に行くほど徐々に小さくなるテーパ部10
ｂ，10ｂを形成している。転造されるねじの径を決める
のはストレート部10ａである。他方の転造用ロールダイ
ス11も同様である。The roll die 10 for rolling has a straight portion 10a with a constant thread diameter at the center portion in the width direction, and both sides of the straight portion 10a reduce wear during rolling.
Tapered section 10 where the thread diameter gradually decreases toward the tip
b, 10b are formed. It is the straight portion 10a that determines the diameter of the thread to be rolled. The same applies to the other rolling die 11 for rolling.
【００２４】かかる転造用ロールダイス10，11により棒
状素材Ｓ1 がラック部１と反対側の端部から順に中ほど
に転造していく。すなわちこの棒状素材Ｓ1 の端部が転
造開始部分で、転造用ロールダイス10，11の接近動作が
あり、上記ロールダイスの形状から棒状素材Ｓ1 の端部
は安定したねじ転造が期待できず不完全ねじ部となる。The bar-shaped material S 1 is rolled in the middle from the end opposite to the rack 1 by the rolling dies 10, 11. That is, the end portion is rolling start portion of the rod-shaped material S 1, there is approach movement of the rolling roll dies 10 and 11, the ends of the rod-shaped material S 1 from the shape of the roll-dies is stable thread rolling It cannot be expected, resulting in incomplete thread.
【００２５】そこで転造成形は、所定ねじ部より長めに
行う。そして棒状素材Ｓ1 の転造終了部分でも、転造用
ロールダイス10，11の離反動作および上記ロールダイス
の形状等から安定したねじ転造が期待できず不完全ねじ
部となるので、この不完全ねじ部を有効ねじ部に加えて
所定ねじ部とする。Therefore, the roll forming is performed to be longer than the predetermined screw portion. And even in rolling termination portion of the rod-shaped material S 1, since a stable thread rolling becomes incomplete thread portion can not be expected from the shape of the separating operation and the roll-dies of the rolling roll dies 10 and 11, the non The complete thread portion is added to the effective thread portion to make a predetermined thread portion.
【００２６】こうして転造成形されたラックねじ軸Ｓ2
を図１に示す。転造成形は、繊維組織の連続性を維持
することができるので、強度に優れるとともに、生産効
率も高い。The thus formed rack screw shaft S 2
Is shown in FIG. Roll forming can maintain the continuity of the fiber structure, so it has excellent strength and high production efficiency.
【００２７】ラックねじ軸Ｓ2 のねじ部２は、転造範囲
のうちねじ径が略一定の安定した有効ねじ部の両側に不
完全ねじ部が形成されている。前記所定ねじ部のうち有
効ねじ部の長さは、ラック部１の長さに略等しい。この
ラックねじ軸Ｓ2 のねじ径の変化を図３に示す。The threaded portion 2 of the rack screw shaft S 2 is incomplete thread portion on either side of the effective screw portion screw diameter is substantially constant stability of the rolling range is formed. The length of the effective screw portion of the predetermined screw portion is substantially equal to the length of the rack portion 1. Shows the change in thread diameter of the rack screw shaft S 2 in FIG.
【００２８】図３に示すグラフは、転造加工により形成
されたラックねじ軸Ｓ2 のねじ部２のＢＣＤ（ボールセ
ンター直径：ねじ軸と理論的接触点で接触する球の中心
を包含する円筒径）を測定した結果を示している。The graph shown in FIG. 3 shows a BCD (ball center diameter: a cylinder including the center of a sphere that comes into contact with the screw shaft at a theoretical contact point) of the thread portion 2 of the rack screw shaft S 2 formed by rolling. (Diameter) is shown.
【００２９】横軸は、転造されたねじ軸を側面視したと
きのねじ溝に転造開始部分から最後の転造終了部分まで
順番に番号を付したもので、各溝番号に対応するねじ溝
のＢＣＤがプロットされ折れ線で連結している。The abscissa represents the thread grooves when the rolled screw shaft is viewed from the side, in which numbers are assigned in order from the rolling start portion to the last rolling end portion. The BCDs of the grooves are plotted and connected by broken lines.
【００３０】転造開始部分でＢＣＤが大きい値で変化し
て不完全ねじ部を示しており、その後バラツキが小さく
なったところがねじ軸の有効ねじ部であり、転造終了部
分でＢＣＤが再び増加して不完全ねじ部を示している。The BCD changes at a large value at the start of rolling to indicate an incomplete thread, and the portion where the variation is reduced thereafter is the effective thread of the screw shaft, and the BCD increases again at the end of rolling. And shows an incomplete thread.
【００３１】次にこのラックねじ軸Ｓ2 のねじ部２の端
部を、略所定ねじ部を残して切断する（図１参照）。
切断する端部の長さは、転造用ロールダイス10，11の幅
長の半分以上の長さであり、したがって切断した端部
は、略不完全ねじ部に相当し、端部が切断されたラック
ねじ軸Ｓ3 の新たな端部は、末端を除けば全て有効ねじ
部である。[0031] Then the ends of the threaded portion 2 of the rack screw shaft S 2, is cut leaving a substantially predetermined threaded portion (see FIG. 1).
The length of the cut end is at least half the width of the roll dies 10 and 11, so the cut end corresponds to a substantially incomplete thread, and the cut end is cut off. and new end of the rack screw shaft S 3 are all except distal useful thread portion.
【００３２】次にこのラックねじ軸Ｓ3 の末端のねじ部
を加工する（図１参照）。すなわち末端にねじ山を削
った滑らかな円周面を形成し、端面に係合溝を切削して
ラックねじ軸Ｓ4 が形成される。該ラックねじ軸Ｓ
4 は、末端がねじ部２より小径の外周面をなし、同末端
に続くねじ部２は有効ねじ部であり、安定した略一定の
ねじ径を構成している。[0032] Next processing the threaded portion of the end of the rack screw shaft S 3 (see FIG. 1). That ends to form a smooth circumferential surface shaved threaded rack screw shaft S 4 is formed by cutting the engaging groove on the end face. The rack screw shaft S
Reference numeral 4 denotes an outer peripheral surface having a smaller diameter at the end than the screw portion 2, and the screw portion 2 following the same end is an effective screw portion, and has a stable and substantially constant screw diameter.
【００３３】このラックねじ軸Ｓ4 のねじ部２にナット
スクリューＮを螺合してボールねじを構成する（図１
参照）。ナットスクリューＮの螺合は、図４に示すよう
に鋼球挿入治具20による鋼球25のナットスクリューＮの
内周のねじ溝への挿入に続けて行われる。[0033] constitute a ball screw screwed a nut screw N into the screw portion 2 of the rack screw shaft S 4 (Fig. 1
reference). The screwing of the nut screw N is performed following the insertion of the steel ball 25 into the screw groove on the inner periphery of the nut screw N by the steel ball insertion jig 20 as shown in FIG.
【００３４】鋼球挿入治具20は、ガイド筒21がナットス
クリューＮを縦向きに保持し、ラックねじ軸Ｓ4 のねじ
溝２ａの小径部に略等しい径の鋼球挿入ノズル22を上か
ら挿入する。鋼球挿入ノズル22の下端にはラックねじ軸
Ｓ4 の上端の係合溝に係脱自在に係合する係合突起部22
ａを有する。In the steel ball insertion jig 20, the guide cylinder 21 holds the nut screw N in the vertical direction, and the steel ball insertion nozzle 22 having a diameter substantially equal to the small diameter portion of the screw groove 2 a of the rack screw shaft S 4 is inserted from above. insert. Engaging projections 22 at the lower end of the steel ball insertion nozzle 22 which engages disengageably the engaging groove of the upper end of the rack screw shaft S 4
a.
【００３５】鋼球挿入ノズル22には、鋼球供給路22ｂが
４本軸方向に穿孔形成され、各鋼球供給路22ｂはそれぞ
れ所定先端位置で屈曲して外周面に出口開口を備えてい
る。ガイド筒21により保持されたナットスクリューＮの
内部に鋼球挿入ノズル22が上方より挿入されて所定位置
に位置決めされ、図示しないフィーダにより各鋼球供給
路22ｂに鋼球25を所定数順次入れ、挿入ロッド23を挿入
して一定ストローク降下させて鋼球25をナットスクリュ
ーＮの内周のねじ溝Ｎａの循環路に供給する。The steel ball insertion nozzle 22 is formed with four steel ball supply passages 22b formed in the axial direction, and each of the steel ball supply passages 22b is bent at a predetermined tip position and has an outlet opening on the outer peripheral surface. . A steel ball insertion nozzle 22 is inserted from above into the nut screw N held by the guide cylinder 21 and positioned at a predetermined position, and a predetermined number of steel balls 25 are sequentially inserted into each steel ball supply path 22b by a feeder (not shown). By inserting the insertion rod 23 and lowering it by a certain stroke, the steel ball 25 is supplied to the circulation path of the thread groove Na on the inner periphery of the nut screw N.
【００３６】こうして鋼球25の挿入を終えると、下方か
ら鉛直姿勢のラックねじ軸Ｓ4 を回転させながら上昇さ
せ、その上端係合溝を係合突起部22ａに係合させ、その
ままラックねじ軸Ｓ4 を回転させながら上昇させると、
ラックねじ軸Ｓ4 のねじ部２が鋼球25を介してナットス
クリューＮに螺入し、鋼球25を循環路に残して鋼球挿入
ノズル22に代わってラックねじ軸Ｓ4 が入れ替わりボー
ルねじの組付けが完了する。[0036] Thus Upon completion of the insertion of the steel ball 25 is raised while rotating the rack screw shaft S 4 vertical posture from below to engage the upper end engaging groove on the engaging protrusion portion 22a, as the rack screw shaft increasing while rotating the S 4,
The screw portion 2 of the rack screw shaft S 4 is screwed into the nut screw N via the steel ball 25, leaving the steel ball 25 in the circulation path and replacing the steel ball insertion nozzle 22 with the rack screw shaft S 4 and replacing the ball screw shaft. Is completed.
【００３７】ここにラックねじ軸Ｓ4 の螺入に際して、
末端がねじ部２より小径の外周面をなし、同末端に続く
ねじ部２は有効ねじ部であり、安定した略一定のねじ径
を構成しているので、円滑にナットスクリューＮに螺入
することができ、ボールねじの組付け作業が容易で生産
性を向上させることができる。Here, when screwing the rack screw shaft S 4 ,
The distal end forms an outer peripheral surface with a smaller diameter than the threaded portion 2, and the threaded portion 2 following the same end is an effective threaded portion and has a stable and substantially constant thread diameter, so that it is smoothly screwed into the nut screw N. As a result, the assembling work of the ball screw is easy and the productivity can be improved.
【００３８】有効ねじ部の長さは、ラック部１の長さと
略等しく、ラック部１の作動範囲内で常に有効ねじ部に
ナットスクリューＮを螺合させてボールねじ機構を円滑
に動作させることができる。The length of the effective screw portion is substantially equal to the length of the rack portion 1. The nut screw N is always screwed into the effective screw portion within the operating range of the rack portion 1 so that the ball screw mechanism operates smoothly. Can be.
【図１】各製造過程におけるラックねじ軸を順に示した
図である。FIG. 1 is a diagram sequentially showing rack screw shafts in each manufacturing process.
【図２】転造成形の説明図である。FIG. 2 is an explanatory diagram of roll forming.
【図３】ラックねじ軸のねじ部のねじ径の変化を示すグ
ラフである。FIG. 3 is a graph showing a change in a screw diameter of a screw portion of a rack screw shaft.
【図４】鋼球挿入治具による鋼球の挿入およびナットス
クリューへのラックねじ軸の螺入を示す説明図である。FIG. 4 is an explanatory view showing insertion of a steel ball by a steel ball insertion jig and insertion of a rack screw shaft into a nut screw.
Ｓ1 …棒状素材、Ｓ2 ，Ｓ3 ，Ｓ4 …ラックねじ軸、Ｎ
…ナットスクリュー、１…ラック部、２…ねじ部、10，
11…転造用ロールダイス、12，13…ガイドブッシュ、20
…鋼球挿入治具、21…ガイド筒、22…鋼球挿入ノズル、
23…挿入ロッド、25…鋼球。S 1 : rod material, S 2 , S 3 , S 4 : rack screw shaft, N
... Nut screw, 1 ... Rack part, 2 ... Screw part, 10,
11 ... roll dies for rolling, 12, 13 ... guide bush, 20
... Steel ball insertion jig, 21 ... Guide tube, 22 ... Steel ball insertion nozzle,
23 ... insert rod, 25 ... steel ball.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 畑山 忠友 埼玉県狭山市新狭山一丁目10番地１ ホン ダエンジニアリング株式会社内 (72)発明者 岩崎 幸弘 埼玉県狭山市新狭山一丁目10番地１ ホン ダエンジニアリング株式会社内 (72)発明者 新田 政雄 埼玉県狭山市新狭山一丁目10番地１ ホン ダエンジニアリング株式会社内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tadatomo Hatayama 1-10-1 Shin-Sayama, Sayama-shi, Saitama Honda Engineering Co., Ltd. (72) Inventor Yukihiro Iwasaki 1-10-1 Shin-Sayama, Sayama-shi, Saitama Honda Engineering Co., Ltd. (72) Inventor Masao Nitta 1-10-1, Shinsayama, Sayama City, Saitama Prefecture Honda Engineering Co., Ltd.
Claims (4)
長さよりも長くねじ部をスルー転造し、 転造されたねじ部の端部を切断して所定ねじ部長さのね
じ部を形成することを特徴とするねじ軸の製造方法。1. A threaded portion having a predetermined length is cut from one end of a rod-shaped material through an end portion of the threaded portion longer than a predetermined length of a threaded portion. A method for manufacturing a screw shaft, comprising forming the screw shaft.
の他側部に端部から所定ねじ部長さよりも長くねじ部を
スルー転造し、 転造されたねじ部の端部を切断して所定ねじ部長さのね
じ部を形成して電動パワーステアリング用ねじ軸を製造
することを特徴とするねじ軸の製造方法。2. A through-rolling of a thread portion longer than a predetermined thread portion length from an end portion of the rod-shaped material having a rack portion formed on one side portion, and cutting the end portion of the rolled thread portion. Forming a screw portion having a predetermined screw portion length to manufacture a screw shaft for electric power steering.
部の両端にできる不完全ねじ部のうち内側の不完全ねじ
部の長さを前記ラック部の長さに加えた長さと略等しく
したことを特徴とする請求項２記載のねじ軸の製造方
法。3. The predetermined screw portion length is substantially equal to the length obtained by adding the length of the inner incomplete screw portion to the length of the rack portion among the incomplete screw portions formed at both ends of the rolled screw portion. 3. The method according to claim 2, wherein the screw shafts are made equal.
長さを少なくとも転造用ロールダイスの幅長の半分とし
たことを特徴とする請求項１または請求項２記載のねじ
軸の製造方法。4. The screw shaft according to claim 1, wherein an end of the rolled screw portion is cut at least half the width of a roll die for rolling. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07390098A JP3938430B2 (en) | 1998-03-23 | 1998-03-23 | Manufacturing method of screw shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07390098A JP3938430B2 (en) | 1998-03-23 | 1998-03-23 | Manufacturing method of screw shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11267785A true JPH11267785A (en) | 1999-10-05 |
| JP3938430B2 JP3938430B2 (en) | 2007-06-27 |
Family
ID=13531549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07390098A Expired - Lifetime JP3938430B2 (en) | 1998-03-23 | 1998-03-23 | Manufacturing method of screw shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3938430B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011173169A (en) * | 2003-09-06 | 2011-09-08 | Schaeffler Technologies Gmbh & Co Kg | Machine element |
| JP2012040606A (en) * | 2010-08-23 | 2012-03-01 | Nsk Ltd | Method of manufacturing screw shaft and screw shaft for electric power steering |
| JP2021037526A (en) * | 2019-09-03 | 2021-03-11 | 日立オートモティブシステムズ株式会社 | Method for manufacturing steering shaft |
-
1998
- 1998-03-23 JP JP07390098A patent/JP3938430B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011173169A (en) * | 2003-09-06 | 2011-09-08 | Schaeffler Technologies Gmbh & Co Kg | Machine element |
| JP2012040606A (en) * | 2010-08-23 | 2012-03-01 | Nsk Ltd | Method of manufacturing screw shaft and screw shaft for electric power steering |
| JP2021037526A (en) * | 2019-09-03 | 2021-03-11 | 日立オートモティブシステムズ株式会社 | Method for manufacturing steering shaft |
| WO2021044685A1 (en) * | 2019-09-03 | 2021-03-11 | 日立Astemo株式会社 | Method for manufacturing steering shaft |
| US12109608B2 (en) | 2019-09-03 | 2024-10-08 | Hitachi Astemo, Ltd. | Method of manufacturing steering shaft |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3938430B2 (en) | 2007-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5276168B2 (en) | How to machine the outer shape of a tube to a certain length | |
| KR20040039350A (en) | Self-tapping screw, blank, method and dies for making the same and method for joining thin workpieces | |
| CA2324161C (en) | Flexible shaft with helical square end | |
| KR100695311B1 (en) | Method of forming cold diametrally reducing roll for metal pipe and metal pipe formed by the method | |
| JPH11267785A (en) | Manufacture of screw shaft | |
| US10882099B2 (en) | Tool manufacturing method and tools produced thereby | |
| JP2592171B2 (en) | Forming method of torsion bar for steering | |
| JP2010043696A (en) | Male screw member and method for manufacturing the same | |
| KR100843363B1 (en) | Method for producing a housing for a ball joint | |
| JPS6114035A (en) | Manufacture of steering shaft | |
| KR101515358B1 (en) | Swaging apparatus and method for manufacturing the long bit socket | |
| JPS60166108A (en) | Manufacture of metallic tube with shaped inner face | |
| CN100358648C (en) | Method for rolling cutting cone scrole spring | |
| JPH10180384A (en) | Method for cutting coil spring | |
| KR19980072196A (en) | Method for manufacturing titanium bolt by cold rolling | |
| JP2002021968A (en) | Ball nut and ball screw device | |
| JPH11333542A (en) | Method for rolling outer peripheral surface of cylinder and working jig | |
| DE19955768A1 (en) | Shaft portion of ball-and-socket joint for use in cars is produced by rolling cold-forged blank, cavity being formed in head to improve its sphericity and undulating surface on the surface of chamber to improve roughness of surface of ball | |
| JP2619684B2 (en) | Manufacturing method of grooved bolt with eccentric flange | |
| JP2003184222A (en) | Reinforcement joint containing coil spring and its manufacturing method | |
| JPS63130234A (en) | Manufacture of grooved bolt | |
| JP2651883B2 (en) | Screw shaft manufacturing method | |
| JP2002126848A (en) | Manufacturing method of helical gear | |
| JP2001239341A (en) | Manufacturing method for coiled spring | |
| JP3768588B2 (en) | Manufacturing method of tip for arc welding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20040813 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20061124 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20061226 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070221 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20070322 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20070322 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110406 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110406 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120406 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130406 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130406 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140406 Year of fee payment: 7 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |