JPH02224844A - Forming method for orifice in pivot bearing - Google Patents
Forming method for orifice in pivot bearingInfo
- Publication number
- JPH02224844A JPH02224844A JP4783589A JP4783589A JPH02224844A JP H02224844 A JPH02224844 A JP H02224844A JP 4783589 A JP4783589 A JP 4783589A JP 4783589 A JP4783589 A JP 4783589A JP H02224844 A JPH02224844 A JP H02224844A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- orifice
- diameter
- pin
- workpiece
- 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
- 238000000034 method Methods 0.000 title claims description 13
- 238000004080 punching Methods 0.000 claims abstract description 18
- 238000004513 sizing Methods 0.000 claims description 2
- 238000010273 cold forging Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 5
- 238000007781 pre-processing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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
- B21K1/20—Making machine elements valve parts
- B21K1/205—Making machine elements valve parts rocker arms
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Sliding-Contact Bearings (AREA)
- Punching Or Piercing (AREA)
- Forging (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分！Ｆ］
この発明は自動車のエンジンのロッカーアームの球状端
を支持するとポット軸受において、油道用の細いオリフ
ィスを冷間圧造加工によって成形する方法に関する。[Detailed description of the invention] [Industrial use! F] This invention relates to a method for forming a narrow orifice for an oil passage in a pot bearing that supports the spherical end of a rocker arm of an automobile engine by cold heading.
［従来の技術］
従来ではこの種のピボット軸受を製作するに際し、ワー
クをプレス機によって冷間圧造加工して所定の外形形状
に成形しかつピボット孔や油孔を成形してから、ワーク
をドリルによって切削加工してピボット孔と油孔とを連
通するオリフィスを穿孔していた。[Conventional technology] Conventionally, when manufacturing this type of pivot bearing, the workpiece was cold-forged using a press machine to form a predetermined external shape, and the pivot hole and oil hole were formed, and then the workpiece was drilled. The orifice that communicates the pivot hole and the oil hole was drilled by cutting.
［発明が解決しようとする課題］
上記ピボット軸受の製作方法の場合にはワークにオリフ
ィスを穿孔するためにワークをプレス機から取出して穿
孔装置によって切削加工する作業が煩雑となって生産性
が低下する１２！題点があり、また、オリフィスの穿孔
後、オリフィスの孔縁をパリ取りする作業や、切削６を
除去する作業が必要となって加工能率が低下する問題点
や、これらの作業中にワークに打痕が起生じたり、オリ
フィスの精度を保持するための管理コストが増大してピ
ボット軸受の製作コストが増大する問題点等があった。[Problems to be Solved by the Invention] In the case of the above-mentioned method for manufacturing a pivot bearing, in order to drill an orifice in the workpiece, the work is taken out from the press machine and cut using a drilling device, which is complicated and reduces productivity. Do 12! In addition, after drilling the orifice, it is necessary to deburr the edges of the orifice and remove the cutting 6, reducing machining efficiency. There have been problems such as dents occurring and the cost of maintaining the orifice accuracy increasing, increasing the manufacturing cost of the pivot bearing.
本発明は上記問題点を解消することを課題とするもので
ある。The present invention aims to solve the above problems.
［課題を解決するための手段］
本発明はワークの一端部側に凹設したピボット孔の底面
と、ワークの他端部側に凹設した油孔の底面との間に前
記ピボット孔と前記油孔とを連通ずる打抜き孔を打抜い
てから、この打抜き孔の孔径より縮小された外径を有す
るオリフィス径決めピンをｆｆＪ配打抜き孔内へ突入さ
せた状態で、前記打抜き孔の周囲の円筒状受圧部を、前
記打抜き孔の孔径より拡大された外径を有する加圧パン
チと、この加圧パンチの外径と等しい外径を有する加圧
ピンとの間で圧縮して前記円筒状受圧部の一部を内方へ
膨出させ、前記打抜き孔の孔径をＩｙＪ記オリフィス径
決めピンの外径にまで縮径してこのオリフィス径決めピ
ンの外径と等しいオリフィス径を有するオリフィスを成
形するビボッｌ−軸受におけるオリフィスの成形方法を
要旨とするものである。[Means for Solving the Problems] The present invention provides a structure in which the pivot hole and the After punching a punched hole that communicates with the oil hole, an orifice diaphragm pin having an outer diameter smaller than the hole diameter of this punched hole is inserted into the ffJ layout punched hole, and the area around the punched hole is The cylindrical pressure receiving part is compressed between a pressure punch having an outer diameter larger than the diameter of the punched hole and a pressure pin having an outer diameter equal to the outer diameter of the pressure punch, thereby forming the cylindrical pressure receiving part. A part of the punched hole is bulged inward, and the diameter of the punched hole is reduced to the outer diameter of the orifice diametric pin described in IyJ to form an orifice having an orifice diameter equal to the outer diameter of the orifice diametric pin. The gist of this paper is a method of forming an orifice in a Vivo l-bearing.
［作 用］
ピボット軸受のオリフィスを成形するに際し、油孔とピ
ボット孔とが成形されたワークにオリフィス径より増大
された孔径を有する打抜き孔を打抜き、この打抜き孔内
に対しオリフィス径と等しい外径を有するオリフィス径
決めピンを突入させた状態で前記打抜き孔の周囲の円筒
状受圧部を、前記打抜き孔の孔径より拡大された外径を
有する加圧パンチと加圧ピンとの間で挟圧して圧縮変形
させ、この円筒状受圧部の一部を内方へ膨出さぼるとと
もに、円筒状受圧部の内径を前記オリフィス径決めピン
の外径にまで縮径させてオリフィスを冷間圧造加工によ
って成形する。[Function] When forming the orifice of a pivot bearing, a punched hole having a hole diameter larger than the orifice diameter is punched in a workpiece in which an oil hole and a pivot hole have been formed, and an outer diameter equal to the orifice diameter is punched into the punched hole. A cylindrical pressure receiving part around the punched hole is pressed between a pressurizing punch and a pressurizing pin having an outer diameter larger than the hole diameter of the punched hole with an orifice diaphragm pin having a diameter inserted thereinto. A part of the cylindrical pressure receiving part is bulged inward, and the inner diameter of the cylindrical pressure receiving part is reduced to the outer diameter of the orifice diaphragm pin, and the orifice is formed by cold heading. Shape.
［発明の効果］
本発明は上記したように構成しであるので、オリフィス
を冷間圧造加工によって成形してピボット軸受を全冷却
量圧造加工工程によって製作することができ、オリフィ
ス径の成形精度を高めてオリフィスを安定かつ能率的に
成形し得るとともに、ピボット軸受の１個当りの製作時
間を大幅に短縮してピボット軸受の生産性及び信頼性を
高め、ピボット軸受の製作コストを大幅に低減し得る効
果がある。[Effects of the Invention] Since the present invention is configured as described above, the orifice can be formed by cold heading and the pivot bearing can be manufactured by the entire cooling amount heading process, and the forming accuracy of the orifice diameter can be improved. In addition to making it possible to form the orifice stably and efficiently, the manufacturing time for each pivot bearing is greatly reduced, increasing the productivity and reliability of the pivot bearing, and significantly reducing the manufacturing cost of the pivot bearing. There are benefits to be gained.
また、円筒状受圧部の内径すなわち打抜き孔の孔径と、
円筒状受圧部の外径とを、オリフィス径に対応してそれ
ぞれ設定することにより、円筒状受圧部の内径をＡリフ
イス径決めピンの外径にまで縮径してオリフィスを成形
することができるので、任意のオリフィス径を有するオ
リフィスを容易に成形することができる。In addition, the inner diameter of the cylindrical pressure receiving part, that is, the hole diameter of the punched hole,
By setting the outer diameter of the cylindrical pressure receiving part in accordance with the orifice diameter, the inner diameter of the cylindrical pressure receiving part can be reduced to the outer diameter of the A-rifice diaphragm pin to form the orifice. Therefore, an orifice having an arbitrary orifice diameter can be easily formed.
〔実施例］
次に、ピボット軸受Ｐを冷間圧造加工によりて成形する
成−形装置の一実施例及びこの成形装置を使用してピボ
ット軸受を成形する方法を図面に従って説明する。[Example] Next, an example of a molding device for molding the pivot bearing P by cold forging and a method of molding the pivot bearing using this molding device will be described with reference to the drawings.
始めに、ピボット軸受Ｐについて説明すると、第２図に
示すように、ピボット軸受Ｐの一端側には段付半球面状
のピボット孔３が凹設された軸受ｍｌが形成され、ピボ
ット軸受Ｐの他端側には段付丸孔状の油孔４が凹設され
たボス部２が形成され、この軸受部１とボス部２とはピ
ボット軸受Ｐの中央部付近に対し周状に突設されたフラ
ンジ５を介して軸方向に対し同心状に連設されている。First, to explain the pivot bearing P, as shown in FIG. A boss portion 2 in which a stepped round oil hole 4 is recessed is formed on the other end side, and the bearing portion 1 and the boss portion 2 protrude circumferentially from near the center of the pivot bearing P. They are concentrically connected in the axial direction via a flange 5 .
ピボット軸受Ｐの軸方向の中央部付近で、ピボット孔３
の底面３ａと、油孔４の底面４ａとの間にはピボット孔
３と油孔４とを連通するオリフィス６が軸心に沿って貫
設されている。Near the center of the pivot bearing P in the axial direction, the pivot hole 3
An orifice 6 that communicates between the pivot hole 3 and the oil hole 4 is provided along the axis between the bottom surface 3a of the oil hole 4 and the bottom surface 4a of the oil hole 4.
ピボット軸受Ｐを冷間圧造加工によって成形するために
設置された多段ヘッダー型プレス機には線材より切断さ
れたワークＷ（第７図（Ａ） ！照）を圧縮成形してワ
ークＷＯ（第７図（Ｂ）参！！Ｉ）とし、このワークＷ
Ｏを通常圧造手段として前方押出し加圧してボス’Ｉ’
Ａ２と油孔４とを有するワークＷ１ （第７図（Ｃ）
参照）を成形し、ワークＷ。A multi-stage header press machine installed to form the pivot bearing P by cold heading is used to compress and mold a workpiece W (see Fig. 7 (A)) cut from a wire rod. See Figure (B)!!I), and this work W
The boss 'I' is formed by forward extrusion and pressure using O as a normal heading means.
Workpiece W1 having A2 and oil hole 4 (Fig. 7(C)
) and form the workpiece W.
ＷＯ、Ｗｌを線材から順次冷開圧造加工するための図示
しない複数の前加工ステージが配列されるとともに、こ
の各前加工ステージで加工されたワークＷ１を圧造加工
して軸受部１．７ランジ部５及びピボット孔３を成形す
るための軸受部成形ステージ１１と、この軸受部成形ス
テージ１１で加工されたワークＷ２にオリフィス成形用
の打抜き孔７を打抜くための打抜きステージ１２と、打
抜きステージ１２で加工されたワークＷ３を圧造加工し
てオリフィス６を成形するためのオリフィス成形ステー
ジ１３とが横一列に配列されている。A plurality of pre-processing stages (not shown) are arranged to sequentially perform cold-open heading processing of WO and Wl from wire rods, and the workpiece W1 processed in each pre-processing stage is subjected to heading processing to form a bearing portion 1.7 lung portion. 5 and the pivot hole 3; a punching stage 12 for punching the punching hole 7 for orifice forming into the workpiece W2 processed by the bearing molding stage 11; Orifice forming stages 13 for forming the orifices 6 by forging the work W3 processed in the above are arranged in a horizontal line.
軸受部成形ステージ１１にはワークＷ１のボス部２を密
嵌状に嵌入するための嵌合孔１８ｂ及びフランジ５を成
形するための７ランジ成形孔１８ａが連設されたダイ１
Ｂと、軸受部１を成形するためのパンチ孔２０ａを有し
、上下方向へ３１退勤Ｍｔ［Ｉされる円筒状の主パンチ
２０と、ワークＷ１の軸受部１の端面を成形するために
パンチ孔２゜ａ内に＠挿されて上下方向へ進退動ｖ制御
される円筒状の突出しピン２１と、軸受部１にピボット
孔３を成形するために突出しピン２１内に対し共動可能
に＠挿されてほぼ半球面状の端面を有するピボット孔成
形パンチ２２と、ワークＷ１のボス部２の端面２ｂに当
接して加工時にこの端面２ｂを内に嵌挿された円筒状の
外受承ピン２３と、ワークＷ１の油孔４内に密嵌されて
油孔４の変形を阻止するために外受承ピン２３内に貞挿
されて上端部が外受承ピン２３の下方へ突出されかつ油
孔４の孔径ＤＯと等しい外径を右する丸棒状の内受承ピ
ン２４とが設置されている。The bearing forming stage 11 includes a die 1 in which a fitting hole 18b for tightly fitting the boss portion 2 of the workpiece W1 and seven flange forming holes 18a for forming the flange 5 are arranged in series.
B, a cylindrical main punch 20 having a punch hole 20a for forming the bearing part 1, and a cylindrical main punch 20 having a punch hole 20a for forming the bearing part 1 in the vertical direction; A cylindrical protrusion pin 21 is inserted into the hole 2°a and is controlled to move forward and backward in the vertical direction, and a cylindrical protrusion pin 21 is movable in the protrusion pin 21 to form the pivot hole 3 in the bearing part 1. A pivot hole forming punch 22 that is inserted and has a substantially hemispherical end surface, and a cylindrical outer receiving pin that comes into contact with the end surface 2b of the boss portion 2 of the workpiece W1 and that is inserted into the end surface 2b during processing. 23, and is fitted tightly into the oil hole 4 of the workpiece W1 and inserted into the outer receiving pin 23 to prevent deformation of the oil hole 4, with the upper end protruding below the outer receiving pin 23. A round rod-shaped inner receiving pin 24 having an outer diameter equal to the hole diameter DO of the oil hole 4 is installed.
軸受部成形ステージ１１では、第４図に示すようにワー
クＷ１のボス部２がダイ１８の嵌合孔１８ａ内に嵌挿さ
れ、外受承ピン２３がボス部２の端面２ｂに当接し、内
受承ピン２４が油孔４内に密嵌された状態で、主パンチ
２０が下方へ進動してダイ１８の上面に当接し、そのパ
ンチ孔りＯａ内にワークＷ１の上部が嵌入される。続い
て、突出しピン２１及びピボット孔成形パンチ２２が下
方へ進動してワークＷ１を下方へ押圧し、ワークＷ１が
圧縮して軸受部２とピボット孔３とが成形されると同時
に、ワークＷ１の一部がダイ１８の７ランジ成形孔１８
ａ内に押出されてこの７ランジ成形孔１８ａ内に充填さ
れ、フランジ５が成形される。In the bearing forming stage 11, as shown in FIG. 4, the boss part 2 of the workpiece W1 is fitted into the fitting hole 18a of the die 18, and the outer bearing pin 23 comes into contact with the end surface 2b of the boss part 2. With the inner receiving pin 24 tightly fitted into the oil hole 4, the main punch 20 advances downward and comes into contact with the upper surface of the die 18, and the upper part of the workpiece W1 is fitted into the punch hole Oa. Ru. Subsequently, the ejecting pin 21 and the pivot hole forming punch 22 move downward to press the workpiece W1 downward, and the workpiece W1 is compressed to form the bearing part 2 and the pivot hole 3, and at the same time, the workpiece W1 A part of the 7-lunge forming hole 18 of the die 18
a and is filled into the seven-lunge forming hole 18a to form the flange 5.
打抜ぎステージ１２には軸受部成形ステージ１１で圧造
加工されたワークＷ２のボス部２を密嵌状に嵌挿するだ
めの保持孔２５ａが貫設されたダイ２５と、ワークＷ２
の中心部にピボット孔３と油孔４とを連通する孔径Ｄ１
の打抜き孔７を打抜くために上下方向へ還退勤制御され
る打扱きパンチ２６と、ワークＷ２のボス部２の端面２
ｂに当接してこの端面２ｂを定位置に保持するためにダ
イ２５の保持孔２５ａ内に嵌挿されかつ打抜き屑を排出
するための排出孔２７ａを有する受承ピン２７とが設置
されている。The punching stage 12 includes a die 25 having a holding hole 25a through which the boss portion 2 of the workpiece W2 that has been forged in the bearing forming stage 11 is inserted in a tight fit, and
A hole diameter D1 that communicates the pivot hole 3 and the oil hole 4 in the center of the
The punch 26 is controlled to move back and forth in the vertical direction to punch out the punching hole 7 of the work W2, and the end face 2 of the boss portion 2 of the workpiece W2.
A receiving pin 27 is installed which is fitted into a holding hole 25a of the die 25 to abut on the end face 2b and hold the end face 2b in a fixed position, and has a discharge hole 27a for discharging punching waste. .
打抜きステージ１２では第５図に示すようにワークＷ２
のボス部２がダイ２５の保持孔２５ａ内に嵌挿されて軸
受部１及び７ランジ５がダイ２５トに露出され、受承ピ
ン２６がワークＷ２のボス部２の端面２ｂに当接した状
態で、打抜きパンチ２７が下方へ進動して、ワークＷ２
の中心部に打抜き孔７を打抜いてから、退勤し、オリフ
ィス６の孔径Ｄ２より拡大されてオリフィス６の成形に
適応する孔径Ｄ１の打抜き孔７を有するワークＷ３が成
形されるとともに、打抜き屑２８が排出孔２７ａを通じ
て排出される。At the punching stage 12, as shown in FIG.
The boss portion 2 of the die 25 was fitted into the holding hole 25a of the die 25, the bearing portions 1 and 7 langes 5 were exposed to the die 25, and the receiving pin 26 came into contact with the end surface 2b of the boss portion 2 of the workpiece W2. In this state, the punch 27 moves downward to remove the workpiece W2.
After punching a punching hole 7 in the center of the workpiece W3, a workpiece W3 having a punching hole 7 with a hole diameter D1 larger than the hole diameter D2 of the orifice 6 and suitable for forming the orifice 6 is formed, and the punching waste is removed. 28 is discharged through the discharge hole 27a.
オリフィス成形ステージ１３にはワークＷ３のフランジ
５の外径より若干拡大された孔径を有プる段付丸孔状の
スライド孔２９ａが縦貫された固定ダイ２９と、ワーク
Ｗ３のボス部２を密嵌状に嵌挿するだめの保持孔３０ａ
が中心部に縦貫されかつ外周面に段部３（ｌが形成され
てスプリング３１で上方へ付勢され、固定ダイ２９のス
ライド孔２９ａ内に対し上下スライド可能に嵌挿されて
扱は止めされた段付円筒状のスライドダイ３ｏと、ワー
クＷ３の軸受部１の上端部付近を密嵌状に嵌入するため
の嵌合孔３２ａが下面に凹設されて上下方向へ進退動Ｂ
Ｊ ａさ°れる外パンチ３２と、この外パンチ３２の中
心部に貫挿されて打扱き孔７の孔径Ｄ１より若干拡大さ
れた外径Ｄ２を有する加圧パンチ３３と、ワークＷ３の
ボス部２の端面２ｂに当接させるためにスライドダイ３
０の保持孔３０ａ内に嵌挿された円筒状の受承ピン３４
と、ワークＷ３の油孔４の底面４ａを加圧するために受
承ピン３４内に嵌挿されて加圧パンチ３３の外径Ｄ２と
等しい外径を有する円筒状の加圧ピン３５と、ワークＷ
３の打抜き孔７内の中心部へ突入してオリフィス６のオ
リフィス径Ｄ３を規定するために加圧ピン３５内に貫挿
されて上端部が加圧ピン３５の上方へ突出されたオリフ
ィス径決めピン３６とが設置されている。オリフィス径
決めピン３６は加圧ピン３５と同時に作動してもよく、
また、オリフィス径決めピン３６と加圧ピン３５とは一
体であってもよい。The orifice forming stage 13 has a fixed die 29 in which a stepped round slide hole 29a having a hole diameter slightly larger than the outer diameter of the flange 5 of the workpiece W3 is inserted vertically, and a boss portion 2 of the workpiece W3 is tightly connected. Holding hole 30a for fitting
is vertically passed through the center, and a step 3 (l) is formed on the outer circumferential surface, is urged upward by a spring 31, and is inserted into the slide hole 29a of the fixed die 29 so as to be vertically slidable, and handling is stopped. A fitting hole 32a for closely fitting the stepped cylindrical slide die 3o and the upper end portion of the bearing portion 1 of the workpiece W3 is recessed in the lower surface, and the slide die 3o moves forward and backward in the vertical direction B.
A pressurizing punch 33 that is inserted through the center of the outer punch 32 and has an outer diameter D2 slightly larger than the hole diameter D1 of the handling hole 7, and a boss portion of the workpiece W3. Slide die 3 to abut against end surface 2b of 2.
A cylindrical receiving pin 34 inserted into the holding hole 30a of 0
, a cylindrical pressure pin 35 that is fitted into the receiving pin 34 to pressurize the bottom surface 4a of the oil hole 4 of the workpiece W3 and has an outer diameter equal to the outer diameter D2 of the pressure punch 33; W
The orifice diameter setting device is inserted into the center of the punched hole 7 of No. 3 and inserted into the pressurizing pin 35 to define the orifice diameter D3 of the orifice 6, with the upper end protruding above the pressurizing pin 35. A pin 36 is installed. The orifice sizing pin 36 may operate simultaneously with the pressure pin 35,
Further, the orifice diameter determining pin 36 and the pressure pin 35 may be integrated.
オリフィス成形ステージ１３では、第６図に示すように
ワークＷ３のボス部２が上動端のスライドダイ３０の保
持孔３０ａ内に嵌挿され、受承ピン３４がワークＷ３の
ボス部２に対向し、加圧ピン３５がワークＷ３の油孔４
内に嵌挿され、オリフィス径決めピン３６がワークＷ３
の打抜き孔７内へ若干突入した状態で、外パンチ３２及
び加圧パンチ３３が下方へ進動し、ワークＷ３の軸受部
１の上端部付近が外パンチ３２の嵌合孔３２ａ内に嵌合
されかつワークＷ３が外パンチ３２で下方へ押圧されて
油孔４の底面４ａが加圧ピン３５に当接するまでスプリ
ング３１に抗してワークＷ３が押下げられるとともに、
ワークＷ３のピボット孔３の底面３ａの中央部付近が加
圧パンチ３３で加圧され、ワークＷ３の打抜き孔７の周
囲の部位で直径がＤ２の範囲内の円筒状受圧部３７（第
１図（＾）参照）が加圧パンチ３３と加圧ピン３５との
間で挟圧されて円筒状受圧部３７に圧縮作用が加えられ
る。In the orifice forming stage 13, as shown in FIG. 6, the boss part 2 of the workpiece W3 is fitted into the holding hole 30a of the slide die 30 at the upper moving end, and the receiving pin 34 is opposed to the boss part 2 of the workpiece W3. Then, the pressure pin 35 connects to the oil hole 4 of the workpiece W3.
The orifice diameter determining pin 36 is inserted into the workpiece W3.
The outer punch 32 and the pressure punch 33 move downward while the workpiece W3 is slightly inserted into the punching hole 7, and the vicinity of the upper end of the bearing portion 1 of the workpiece W3 is fitted into the fitting hole 32a of the outer punch 32. Then, the workpiece W3 is pressed downward by the outer punch 32 and the workpiece W3 is pressed down against the spring 31 until the bottom surface 4a of the oil hole 4 comes into contact with the pressure pin 35.
The vicinity of the center of the bottom surface 3a of the pivot hole 3 of the workpiece W3 is pressurized by the pressure punch 33, and a cylindrical pressure receiving part 37 (see FIG. (see ^)) is pinched between the pressure punch 33 and the pressure pin 35, and a compression action is applied to the cylindrical pressure receiving portion 37.
このとき、ワークＷ３の円筒状受圧部３７を除く部位は
ボス部２が受承ピン３４に当接するまで外パンチ３２で
押下げられてスライドダイ３０とともに下方へ退勤する
が、円筒状受圧部３７は加圧バンブ３３によって下方へ
加圧されかつ加圧ピン３５によって上方へ加圧されて圧
縮変形し、円筒状受圧部３７の一部がワークＷ３の下降
に伴って加圧ピン３５の剪新作用によって内方へ膨出し
てオリフィス径決めピン３６の回りに充填され、円筒状
受圧部３７の内径Ｄ１がオリフィス径決めピン３６の外
径Ｄ２にまで縮径され、円筒状受圧部３７の内方には打
抜き孔７の内方へ膨出した膨出部３８と、オリフィス径
決めピン３６の外径Ｄ３と等しいオリフィス径Ｄ３を有
するオリフィス６とが成形される。At this time, the portion of the workpiece W3 other than the cylindrical pressure receiving portion 37 is pushed down by the outer punch 32 until the boss portion 2 comes into contact with the receiving pin 34 and moves downward together with the slide die 30, but the cylindrical pressure receiving portion 37 is compressed and deformed by being pressurized downward by the pressure bump 33 and upward by the pressure pin 35, and a part of the cylindrical pressure-receiving part 37 is sheared by the pressure pin 35 as the workpiece W3 descends. The action expands inward and fills the area around the orifice diametric pin 36, and the inner diameter D1 of the cylindrical pressure receiving part 37 is reduced to the outer diameter D2 of the orifice diametric pin 36, and the inner diameter of the cylindrical pressure receiving part 37 is filled. A bulging portion 38 that bulges inward of the punched hole 7 and an orifice 6 having an orifice diameter D3 equal to the outer diameter D3 of the orifice diaphragm pin 36 are formed on the other side.
そして、第１図に丞すように円筒状受圧部３７の圧縮前
の高さを１４０、体積を■０とし、加圧パンチ３３が進
勤嬬へ下降したときの加圧パンチ３３の先端面３３ａと
加圧ピン３５の先端面３５ａとの間隔をＨｌとし、膨出
部３８の体積をｖｌとすると、膨出部３８の体積ｖ１は
円筒状受圧部３７内において円筒状受圧部３７の下面か
ら膨出部３８の下面までの範囲の円筒部分、すなわち、
ｌｏ−８１に相当する高さ）」２の円筒部分３９の体積
■２と・等しくなってこの円筒部分３９の体積■２が打
抜き孔７の内方へ押出されたことになり、また、円筒状
受圧部３７の体積■０は前記円筒部分３９の体積Ｖ２と
膨出部３５の体積■１とを加えた体積となる。As shown in FIG. 1, the height of the cylindrical pressure-receiving part 37 before compression is 140, the volume is 0, and the tip surface of the pressure punch 33 when the pressure punch 33 is lowered to the top. 33a and the tip end surface 35a of the pressure pin 35 is Hl, and the volume of the bulging part 38 is vl, the volume v1 of the bulging part 38 is the lower surface of the cylindrical pressure receiving part 37 in the cylindrical pressure receiving part 37. The cylindrical portion in the range from to the lower surface of the bulge 38, that is,
The volume (2) of the cylindrical portion 39 at the height (corresponding to lo-81) 2 is equal to the volume (2) of the cylindrical portion 39, and the volume (2) of the cylindrical portion 39 is pushed inward of the punched hole 7. The volume ``0'' of the shaped pressure receiving part 37 is the sum of the volume V2 of the cylindrical part 39 and the volume ``1'' of the bulging part 35.
従って、円筒状受圧部３７の内径、すなわち打抜き孔７
の孔径Ｄ１と、円筒状受圧部３７の外径、すなわち加圧
パンチ３３及び加圧ピン３５の外径Ｄ２とを、オリフィ
ス６のオリフィス径Ｄ３に対応して設定することにより
、所望のオリフィス径を有するオリフィス６を成形する
ことができる。Therefore, the inner diameter of the cylindrical pressure receiving part 37, that is, the punched hole 7
By setting the hole diameter D1 and the outer diameter of the cylindrical pressure receiving part 37, that is, the outer diameter D2 of the pressure punch 33 and the pressure pin 35, in correspondence with the orifice diameter D3 of the orifice 6, a desired orifice diameter can be obtained. The orifice 6 can be molded.
続いて、上記した構成をもつ実施例の作用と効果を説明
する。Next, the operation and effects of the embodiment having the above configuration will be explained.
本例ではワークＷ３の一端部側に凹設したピボット孔３
の底面３ａと、ワークＷ３の他端部側に凹設した油孔４
の底面４ａとの間にビボッ］・孔３と油孔４とを連通す
る打抜き孔７を打抜いてから、この打抜き孔７の孔径Ｄ
１より縮小された外径Ｄ３を有するオリフィス径決めピ
ン３６を打抜き孔７内へ突入させた状態で、打法き孔７
の周囲の円筒状受圧部３７を、打抜き孔７の孔径Ｄ１よ
り拡大された外径Ｄ２を有する加圧パンチ３３と、この
加圧パンチ３３の外径Ｄ２と等しい外径を有する加圧ピ
ン３５との間で圧縮して円筒状受圧部３７の一部を内方
へ膨出させ、打抜ぎ孔７の孔径Ｄ１をオリフィス径決め
ピン３６の外径Ｄ３にまで縮径してこのオリフィス径決
めピン３６の外径Ｄ３と等しいオリフィス径Ｄ３を有す
るオリフィス６を成形する。In this example, the pivot hole 3 is recessed on one end side of the work W3.
An oil hole 4 recessed in the bottom surface 3a of the workpiece W3 and the other end side of the workpiece W3
・After punching out a punched hole 7 that communicates the hole 3 and the oil hole 4, the hole diameter D of this punched hole 7 is
1, the orifice diaphragm pin 36 having an outer diameter D3 smaller than 1 is inserted into the punched hole 7.
A pressure punch 33 having an outer diameter D2 larger than the hole diameter D1 of the punched hole 7 and a pressure pin 35 having an outer diameter equal to the outer diameter D2 of the pressure punch 33 The cylindrical pressure-receiving part 37 is partially bulged inward by being compressed between The orifice 6 having an orifice diameter D3 equal to the outer diameter D3 of the fixing pin 36 is formed.
このため、オリフィス６を冷間圧造加工によって成形し
てピボット軸受りを全冷間圧造加工工程によって製作す
ることができ、オリフィス６の成形精度を高めてオリフ
ィス６を安定かつ能率的に成形し得るとともに、各加工
段階のワークを多段ヘッダー型プレス機の複数の加工ス
テージに対し同時にセットして各加工ステージで順次同
期的に加工することができるので、ピボット軸受Ｐの１
個当りの製作時間を大幅に短縮してピボット軸受の生産
性及び信頼性を高め、ピボット軸受の製作コストを大幅
に低減し得る効宋がある。Therefore, the orifice 6 can be formed by cold heading processing and the pivot bearing can be manufactured entirely by cold heading processing, and the forming precision of the orifice 6 can be improved and the orifice 6 can be formed stably and efficiently. At the same time, the workpieces at each processing stage can be set at the same time on multiple processing stages of the multi-stage header type press machine and processed sequentially and synchronously in each processing stage.
There is an advantage that the manufacturing time per piece can be significantly shortened, the productivity and reliability of the pivot bearing can be increased, and the manufacturing cost of the pivot bearing can be significantly reduced.
また、円筒状受圧部３７の内径すなわち打扱き孔７の孔
径Ｄ１と、円筒状受圧部３７の外径すなわち加圧パンチ
３３及び加圧ピン３５の外径Ｄ２とを、オリフィス径に
対応してそれぞれ設定すると、円筒状受圧部３７の内径
をオリフィス径決めピン３６の外径Ｄ３にまで縮径して
オリフィス６を成形することができるので、任意のオリ
フィス径Ｄ３を右するオリフィス６を容易かつ正確に成
形づることができる。In addition, the inner diameter of the cylindrical pressure receiving part 37, that is, the hole diameter D1 of the handling hole 7, and the outer diameter of the cylindrical pressure receiving part 37, that is, the outer diameter D2 of the pressure punch 33 and the pressure pin 35, are set to correspond to the orifice diameter. If these settings are made, the orifice 6 can be formed by reducing the inner diameter of the cylindrical pressure receiving part 37 to the outer diameter D3 of the orifice diaphragm pin 36. Therefore, the orifice 6 can be easily and easily formed to have an arbitrary orifice diameter D3. Can be molded accurately.
図面は本発明の一実施例を示すもので、第１図（Ａ）、
（８）はオリフィスの成形過程を順に示す要部の拡大ｗ
１断面図、第２図はビボッ１−軸受の縦断面図、第３図
はプレス機の要部の縦断面図、第４図（Ａ）、 （Ｂ）
は軸受部成形ステージでの成形過程を順に示す要部の縦
断面図、第５図（＾）、 （Ｂ）は打抜きステージでの
成形過程を順に丞ず要部の縦断面図、第６図（Ａ）、
（Ｂ）はオリフィス成形ステージでの成形過程を順に示
す要部の縦断面図、第７図（＾）（Ｂ）、 （Ｃ）は前
加工ステージでのワークの成形過程を順に示すワークの
正面図である。
３・・・ピボット孔
４・・・油 孔
６・・・オリフィス
７・・・打抜き孔
３３・・・加圧パンチ
３５・・・加圧ピン
３６・・・オリフィス径決めピン
３７・・・円筒状受圧部
Ｐ・・・ピボット軸受
Ｄ３・・・オリフィス径The drawings show one embodiment of the present invention, and include FIG. 1(A),
(8) is an enlargement of the main parts showing the orifice forming process in order.
1 sectional view, Figure 2 is a vertical sectional view of the Vivot 1 bearing, Figure 3 is a vertical sectional view of the main parts of the press, and Figures 4 (A) and (B).
5 (^) is a longitudinal sectional view of the main part showing the forming process in the bearing forming stage in order, (B) is a longitudinal sectional view of the main part showing the forming process in the punching stage in order, and Fig. 6 (A),
(B) is a vertical cross-sectional view of the main part showing the forming process in the orifice forming stage in order, Figure 7 (^) (B), (C) is the front view of the workpiece showing the forming process of the workpiece in the pre-processing stage in order. It is a diagram. 3... Pivot hole 4... Oil Hole 6... Orifice 7... Punching hole 33... Pressure punch 35... Pressure pin 36... Orifice diameter determining pin 37... Cylindrical Shape pressure receiving part P... Pivot bearing D3... Orifice diameter
Claims (1)
クの他端部側に凹設した油孔の底面との間に前記ピボッ
ト孔と前記油孔とを連通する打抜き孔を打抜いてから、
この打抜き孔の孔径より縮小された外径を有するオリフ
ィス径決めピンを前記打抜き孔内へ突入させた状態で、
前記打抜き孔の周囲の円筒状受圧部を、前記打抜き孔の
孔径より拡大された外径を有する加圧パンチと、この加
圧パンチの外径と等しい外径を有する加圧ピンとの間で
圧縮して前記円筒状受圧部の一部を内方へ膨出させ、前
記打抜き孔の孔径を前記オリフィス径決めピンの外径に
まで縮径してこのオリフィス径決めピンの外径と等しい
オリフィス径を有するオリフィスを成形することを特徴
とするピボット軸受におけるオリフィスの成形方法。A punching hole is punched out between the bottom surface of the pivot hole recessed in one end of the workpiece and the bottom surface of the oil hole recessed in the other end of the workpiece, the hole communicating the pivot hole and the oil hole. from,
With an orifice sizing pin having an outer diameter smaller than the diameter of the punched hole inserted into the punched hole,
A cylindrical pressure receiving part around the punched hole is compressed between a pressure punch having an outer diameter larger than the diameter of the punched hole and a pressure pin having an outer diameter equal to the outer diameter of the pressure punch. to bulge a part of the cylindrical pressure receiving part inward, and reduce the diameter of the punched hole to the outer diameter of the orifice diametric pin to create an orifice diameter equal to the outer diameter of the orifice diametric pin. 1. A method for forming an orifice in a pivot bearing, the method comprising forming an orifice having the following characteristics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4783589A JPH02224844A (en) | 1989-02-28 | 1989-02-28 | Forming method for orifice in pivot bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4783589A JPH02224844A (en) | 1989-02-28 | 1989-02-28 | Forming method for orifice in pivot bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02224844A true JPH02224844A (en) | 1990-09-06 |
| JPH033531B2 JPH033531B2 (en) | 1991-01-18 |
Family
ID=12786420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4783589A Granted JPH02224844A (en) | 1989-02-28 | 1989-02-28 | Forming method for orifice in pivot bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02224844A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012168076A1 (en) * | 2011-06-08 | 2012-12-13 | Robert Bosch Gmbh | Method for producing a throttle |
-
1989
- 1989-02-28 JP JP4783589A patent/JPH02224844A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012168076A1 (en) * | 2011-06-08 | 2012-12-13 | Robert Bosch Gmbh | Method for producing a throttle |
| JP2014516798A (en) * | 2011-06-08 | 2014-07-17 | ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング | How to make a throttle |
| US9511456B2 (en) | 2011-06-08 | 2016-12-06 | Robert Bosch Gmbh | Method for producing a throttle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH033531B2 (en) | 1991-01-18 |
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