JPH033531B2 - - Google Patents
Info
- Publication number
- JPH033531B2 JPH033531B2 JP4783589A JP4783589A JPH033531B2 JP H033531 B2 JPH033531 B2 JP H033531B2 JP 4783589 A JP4783589 A JP 4783589A JP 4783589 A JP4783589 A JP 4783589A JP H033531 B2 JPH033531 B2 JP H033531B2
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 claims description 14
- 238000004080 punching Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000007781 pre-processing Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000010273 cold forging Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000004513 sizing 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)
- Sliding-Contact Bearings (AREA)
- Punching Or Piercing (AREA)
- Forging (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
【発明の詳細な説明】
[産業上の利用分野]
この発明は自動車のエンジンのロツカーアーム
の球状端を支持するピボツト軸受において、油道
用の細いオリフイスを冷間圧造加工によつて成形
する方法に関する。[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a method for forming a narrow orifice for an oil passage in a pivot 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ツト軸受を製作するに際
し、ワークをプレス機によつて冷間圧造加工して
所定の外形形状に成形しかつピボツト孔や油孔を
成形してから、ワークをドリルによつて切削加工
してピボツト孔と油孔とを連通するオリフイスを
穿孔していた。[Prior art] Conventionally, when manufacturing this type of pivot bearing, a workpiece is cold-forged using a press machine to form a predetermined external shape, and a pivot hole and an oil hole are formed, and then the workpiece is An orifice was drilled to communicate the pivot hole and the oil hole.
[発明が解決しようとする課題]
上記ピボツト軸受の製作方法の場合にはワーク
にオリフイ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つて切削加工する作業
が煩雑となつて生産性が低下する問題点があり、
また、オリフイスの穿孔後、オリフイスの孔縁を
バリ取りする作業や、切削屑を除去する作業が必
要となつ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したり、オリフイ
スの精度を保持するための管理コストが増大して
ピボツト軸受の製作コストが増大する問題点等が
あつた。[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 of the press machine and cut using a drilling device, which is complicated and reduces productivity. There is a problem that the
In addition, after drilling the orifice, it is necessary to deburr the edge of the orifice and remove cutting debris, which reduces machining efficiency, and dents may occur on the workpiece during these operations. Also, there were problems such as an increase in the management cost for maintaining the accuracy of the orifice and an increase in 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ツト
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ツ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イス径決め
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、この加圧パンチに相対向する加圧ピンとで圧
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イス径決め
ピンの外径にまで縮径してこのオリフイス径決め
ピンの外径と等しいオリフイス径を有するオリフ
イスを成形するピボツト軸受におけるオリフイス
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 method for connecting the pivot hole and the oil hole between the bottom surface of a pivot hole recessed in one end of the workpiece and the bottom surface of an oil hole recessed in the other end of the workpiece. After punching a punched hole that communicates with the oil hole, an orifice diaphragm pin having an outer diameter smaller than the diameter of the punched hole is inserted into the punched hole, and the cylinder around the punched hole is inserted into the punched hole. A part of the cylindrical pressure receiving part is compressed inward by a pressure punch having an outer diameter larger than the diameter of the punched hole and a pressure pin facing the pressure punch. A method for forming an orifice in a pivot bearing, wherein the punched hole is bulged and the diameter of the punched hole is reduced to the outer diameter of the orifice diametric pin to form an orifice having an orifice diameter equal to the outer diameter of the orifice diametric pin. This is a summary.
[作用]
ピボツト軸受のオリフイスを成形するに際し、
油孔とピボツト孔とが成形されたワークにオリフ
イ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イス径と等し
い外径を有するオリフイ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せ
るとともに、円筒状受圧部の内径を前記オリフイ
ス径決めピンの外径にまで縮径させてオリフイス
を冷間圧造加工によつて成形する。[Function] When forming the orifice of the pivot bearing,
A punched hole having a hole diameter larger than the orifice diameter is punched out in a workpiece in which an oil hole and a pivot hole are formed, and an orifice sizing pin having an outer diameter equal to the orifice diameter is inserted into the punched hole. A cylindrical pressure receiving part around the punched hole,
The cylindrical pressure-receiving portion is compressed and deformed by being compressed between a pressure punch having an outer diameter larger than the hole diameter of the punched hole and a pressure pin, and a part of the cylindrical pressure-receiving portion is bulged inward. The inner diameter of the orifice is reduced to the outer diameter of the orifice diaphragm pin, and the orifice is formed by cold heading.
[発明の効果]
本発明は上記したように構成してあるので、オ
リフイスを冷間圧造加工によつて成形してピボツ
ト軸受を全冷却間圧造加工工程によつて製作する
ことができ、オリフイス径の成形精度を高めてオ
リフイスを安定かつ能率的に成形し得るととも
に、ピボツト軸受の1個当りの製作時間を大幅に
短縮してピボツト軸受の生産性及び信頼性を高
め、ピボツ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 cold heading process, and the orifice diameter can be reduced. It is possible to improve the forming accuracy of the orifice and form the orifice stably and efficiently, and to significantly reduce the manufacturing time per pivot bearing, increasing the productivity and reliability of the pivot bearing, and reducing the manufacturing cost of the pivot bearing. There is an effect that can significantly reduce the amount.
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、オリフイス径
に対応してそれぞれ設定することにより、円筒状
受圧部の内径をオリフイス径決めピンの外径にま
で縮径してオリフイスを成形することができるの
で、任意のオリフイス径を有するオリフイスを容
易に成形することができる。 In addition, by setting the inner diameter of the cylindrical pressure receiving part, that is, the hole diameter of the punched hole, and the outer diameter of the cylindrical pressure receiving part corresponding to the orifice diameter, the inner diameter of the cylindrical pressure receiving part can be adjusted to the outside of the orifice diaphragm pin. Since the orifice can be molded by reducing the diameter to the desired diameter, an orifice having an arbitrary orifice diameter can be easily molded.
[実施例]
次に、ピボツト軸受Pを冷間圧造加工によつて
成形する成形装置の一実施例及びこの成形装置を
使用してピボツト軸受を成形する方法を図面に従
つて説明する。[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、ピボツト軸受Pについて説明すると、
第2図に示すように、ピボツト軸受Pの一端側に
は段付半球面状のピボツト孔3が凹設された軸受
部1が形成され、ピボツト軸受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とはピボツト軸受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。
ピボツト軸受Pの軸方向の中央部付近で、ピボツ
ト孔3の底面3aと、油孔4の底面4aとの間に
はピボツト孔3と油孔4とを連通するオリフイス
6が軸心に沿つて貫設されている。 First, let me explain about the pivot bearing P.
As shown in FIG. 2, a bearing portion 1 having a stepped hemispherical pivot hole 3 is formed at one end of the pivot bearing P, and a stepped round hole is formed at the other end of the pivot bearing P. A boss portion 2 is formed in which a shaped oil hole 4 is recessed, and this bearing portion 1 and boss portion 2 are connected to a pivot bearing P.
A flange 5 protruding circumferentially from near the center of the
They are connected concentrically in the axial direction via the.
Near the center of the pivot bearing P in the axial direction, between the bottom surface 3a of the pivot hole 3 and the bottom surface 4a of the oil hole 4, there is an orifice 6 along the axis that communicates the pivot hole 3 and the oil hole 4. It is installed through.
ピボツト軸受Pを冷間圧造加工によつて成形す
るために設置された多段ヘツ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参照)を
圧縮成形してワークW0(第7図B参照)とし、
このワークW0を通常圧造手段として前方押出し
加圧してボス部2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,W0,W
1を線材から順次冷間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W
1を圧造加工して軸受部1、フランジ部5及びピ
ボツト孔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にオリフイ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
オリフイス6を成形するためのオリフイス成形ス
テージ13とが横一列に配列されている。 A multi-stage header type press installed to form the pivot bearing P by cold heading is used to compress and mold a workpiece W (see Fig. 7A) cut from a wire rod, and then compress and mold the workpiece W0 (see Fig. 7A). (see B),
A workpiece W1 having a boss portion 2 and an oil hole 4 by forwardly extruding and pressurizing the workpiece W0 as a normal heading means.
(See Fig. 7C) and form the workpieces W, W0, W
A plurality of pre-processing stages (not shown) are arranged for sequentially cold-heading 1 from a wire rod, and the workpiece W processed at each pre-processing stage is arranged.
A bearing part forming stage 11 is used to form the bearing part 1, flange part 5, and pivot hole 3 by forging the work piece W2. A punching stage 12 for punching and an orifice forming stage 13 for forming the orifice 6 by heading the workpiece W3 processed by the punching stage 12 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を成形するためのフランジ成形孔18
aが連設されたダイ18と、軸受部1を成形する
ためのパンチ孔20aを有し、上下方向へ進退動
制御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20
a内に嵌挿されて上下方向へ進退動制御される円
筒状の突出しピン21と、軸受部1にピボツト孔
3を成形するために突出しピン21内に対し共動
可能に嵌挿されてほぼ半球面状の端面を有するピ
ボツト孔成形パンチ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
定位置に保持するためにダイ18の嵌合孔18b
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内に貫挿されて上端
部が外受承ピン23の上方へ突出されかつ油孔4
の孔径D0と等しい外径を有する丸棒状の内受承
ピン24とが設置されている。 The bearing part forming stage 11 has a fitting hole 18b for tightly fitting the boss part 2 of the workpiece W1 and a flange forming hole 18 for forming the flange 5.
a, a cylindrical main punch 20 that has a punch hole 20a for forming the bearing part 1 and is controlled to advance and retreat in the vertical direction, and a workpiece W1.
A punch hole 20 is punched in order to form the end face of the bearing part 1.
A cylindrical protruding pin 21 that is inserted into the inside of the protrusion pin 21 and controlled to move forward and backward in the vertical direction; A pivot hole forming punch 22 having a hemispherical end surface, and a fitting hole 18b of the die 18 for abutting against the end surface 2b of the boss portion 2 of the workpiece W1 and holding this end surface 2b in a fixed position during processing.
A cylindrical outer receiving pin 23 is inserted into the inner part of the workpiece W1, and an upper end is inserted into the outer receiving pin 23 to tightly fit into the oil hole 4 of the workpiece W1 to prevent deformation of the oil hole 4. The part protrudes above the outer receiving pin 23 and the oil hole 4
A round rod-shaped inner receiving pin 24 having an outer diameter equal to the hole diameter D0 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1
8a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20a
内にワークW1の上部が嵌入される。続いて、突
出しピン21及びピボツト孔成形パンチ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とピボツト孔3とが成形
されると同時に、ワークW1の一部がダイ18の
フランジ成形孔18a内に押出されてこのフラン
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.
8a, the outer receiving pin 23 is in contact with the end surface 2b of the boss portion 2, and the inner receiving pin 24 is tightly fitted in the oil hole 4, and the main punch 20 moves downward. the punch hole 20a.
The upper part of the workpiece W1 is fitted into the inside. 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 is A part of the flange forming hole 18a of the die 18 is extruded and filled into the flange forming hole 18a, and the flange 5 is formed.
打抜きステージ12には軸受部成形ステージ1
1で圧造加工されたワークW2のボス部2を密嵌
状に嵌挿するための保持孔25aが貫設されたダ
イ25と、ワークW2の中心部にピボツト孔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進退動制御される打抜きパン
チ26と、ワークW2のボス部2の端面2b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 bearing forming stage 1.
A die 25 through which a holding hole 25a for tightly fitting the boss portion 2 of the workpiece W2 that was forged in step 1 is inserted communicates with the pivot hole 3 and the oil hole 4 in the center of the workpiece W2. A punch 26 that is controlled to move forward and backward in the vertical direction in order to punch out a punch hole 7 having a hole diameter D1, and a die that comes into contact with the end surface 2b of the boss portion 2 of the workpiece W2 and holds this end surface 2b in a fixed position. A receiving pin 27 is installed which is fitted into the holding hole 25a of No. 25 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及びフランジ5がダイ25
上に露出され、受承ピン27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
26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、退動し、オリフイス6
の孔径D3より拡大されてオリフイス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W
3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.
With the receiving pin 27 exposed upward and in contact with the end surface 2b of the boss portion 2 of the work W2, the punch 26 moves downward to punch a punch hole 7 in the center of the work W2. , retreat, orifice 6
A workpiece W having a punched hole 7 having a hole diameter D1 that is larger than the hole diameter D3 and adapted for forming the orifice 6.
3 is formed, and the punching waste 28 is discharged through the discharge hole 27a.
オリフイス成形ステージ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す
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
嵌挿するための保持孔30aが中心部に縦貫され
かつ外周面に段部30b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
抜け止めされた段付円筒状のスライドダイ30
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制御される外パンチ32と、
この外パンチ32の中心部に貫挿されて打抜き孔
7の孔径D1より若干拡大された外径D4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30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
めに加圧パンチ33に相対向して受承ピン34内
に嵌挿されて外径D2を有する円筒状の加圧ピン
35と、ワークW3の打抜き孔7内の中心部へ突
入してオリフイス6のオリフイス径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イス径決め
ピン36とが設置されている。オリフイス径決め
ピン36は加圧ピン35と同時に作動してもよ
く、また、オリフイス径決めピン36と加圧ピン
35とは一体であつてもよい。 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 the boss portion 2 of the workpiece W3 is tightly fitted into the fixed die 29. A holding hole 30a for fitting into the fixed die 29 is vertically passed through the center, and a stepped portion 30b is formed on the outer circumferential surface, which is biased upward by a spring 31, and is fit into the slide hole 29a of the fixed die 29 so as to be vertically slidable. Stepped cylindrical slide die 30 inserted and prevented from falling out
and an outer punch 32 having a fitting hole 32a recessed in its lower surface for tightly fitting the vicinity of the upper end of the bearing portion 1 of the workpiece W3, and whose forward and backward movement is controlled in the vertical direction.
A pressurizing punch 33 is inserted into the center of the outer punch 32 and has an outer diameter D4 slightly larger than the hole diameter D1 of the punched hole 7, and a pressurizing punch 33 is slid to make it come into contact with the end surface 2b of the boss portion 2 of the workpiece W3. A cylindrical receiving pin 34 inserted into the holding hole 30a of the die 30
, a cylindrical pressure pin 35 having an outer diameter D2 that is fitted into the receiving pin 34 opposite to the pressure punch 33 in order to pressurize the bottom surface 4a of the oil hole 4 of the workpiece W3; An orifice diameter setting member that enters into the center of the punched hole 7 of W3 and is inserted into the pressurizing pin 35 to define the orifice diameter D3 of the orifice 6, with its upper end protruding above the pressurizing pin 35. A pin 36 is installed. The orifice diameter setting pin 36 may operate simultaneously with the pressure pin 35, or the orifice diameter setting pin 36 and the pressure pin 35 may be integrated.
オリフイス成形ステージ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
フイス径決めピン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のピボツト
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D4の範囲内の円筒状受圧部37(第1
図A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。加圧ピン35の外径D2、形状はボス
部2の変形防止に必要な寸法に設定される。 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 faces the boss part 2 of the workpiece W3. Then, the pressure pin 35 is inserted into the oil hole 4 of the work W3, and the orifice diaphragm pin 36 is inserted into the punched hole 7 of the work W3.
With the workpiece W3 slightly protruding inward, the outer punch 32 and the pressure punch 33 move downward, 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, and the workpiece W3 is pressed downward by the outer punch 32, and the workpiece W3 is pushed against the spring 31 until the bottom surface 4a of the oil hole 4 comes into contact with the pressure pin 35.
is pushed down, and the vicinity of the center of the bottom surface 3a of the pivot hole 3 of the workpiece W3 is pressurized by the pressurizing punch 33, and a cylindrical pressure-receiving shape with a diameter within the range of D4 is formed around the punched hole 7 of the workpiece W3. Part 37 (1st
(see FIG. A) 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. The outer diameter D2 and shape of the pressure pin 35 are set to dimensions necessary to prevent the boss portion 2 from deforming.
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
ともに下方へ退動するが、円筒状受圧部37は加
圧パンチ33によつて下方へ加圧されかつ加圧ピ
ン35によつ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の下降に伴つ
て加圧ピン35の剪断作用によつて内方へ膨出し
てオリフイス径決めピン36の回りに充填され、
円筒状受圧部37の内外D1がオリフイス径決め
ピン36の外径D3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、オリフイス径決めピン36の外径D
3と等しいオリフイス径D3を有するオリフイス
6とが成形される。 At this time, the portion of the workpiece W3 excluding 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 punch 33 and upward by the pressure pin 35, and a part of the cylindrical pressure receiving part 37 is pressurized as the workpiece W3 descends. It expands inward due to the shearing action of the pin 35 and fills around the orifice diaphragm pin 36,
The inner and outer diameters D1 of the cylindrical pressure receiving part 37 are reduced to the outer diameter D3 of the orifice diameter determining pin 36, and the cylindrical pressure receiving part 37 has a bulging part 38 that bulges inward of the punched hole 7, Outer diameter D of orifice diameter setting pin 36
An orifice 6 having an orifice diameter D3 equal to 3 is formed.
そして、第1図に示すように円筒状受圧部37
の圧縮前の高さをH0、体積をV0とし、加圧パ
ンチ33が進動端へ下降したときの加圧パンチ3
3の先端面33aと加圧ピン35の先端面35a
との間隔をH1とし、膨出部38の体積をV1と
すると、膨出部38の体積V1は円筒状受圧部3
7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、H
0−H1に相当する高さH2の円筒部分39の体
積V2と等しくなつてこの円筒部分39の体積V
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V0は前記円筒部
分39の体積V2と膨出部35の体積V1とを加
えた体積となる。 Then, as shown in FIG.
The height before compression is H0, the volume is V0, and the pressure punch 3 when the pressure punch 33 descends to the advancing end
3 and the tip surface 35a of the pressure pin 35.
Let H1 be the distance between the cylindrical pressure receiving part 3 and the volume of the bulged part 38 be V1.
7, the cylindrical portion in the range from the lower surface of the cylindrical pressure receiving portion 37 to the lower surface of the bulging portion 38, that is, the H
The volume V of the cylindrical portion 39 is equal to the volume V2 of the cylindrical portion 39 with a height H2 corresponding to 0-H1.
2 was pushed out inward of the punched hole 7,
Further, the volume V0 of the cylindrical pressure receiving portion 37 is the sum of the volume V2 of the cylindrical portion 39 and the volume V1 of the bulging portion 35.
従つて、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の外径D4と、加圧
ピン35の外径D2とを、オリフイス6のオリフ
イス径D3に対応して設定することにより、所望
のオリフイス径を有するオリフイス6を成形する
ことができる。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。 Therefore, the inner diameter of the cylindrical pressure receiving part 37, that is, the hole diameter D1 of the punched hole 7, the outer diameter of the cylindrical pressure receiving part 37, that is, the outer diameter D4 of the pressure punch 33, and the outer diameter D2 of the pressure pin 35. By setting the orifice diameter D3 of the orifice 6 in accordance with the orifice diameter D3, the orifice 6 can be formed to have a desired orifice diameter. 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
ツト孔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との間にピボツト孔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の外径D1より縮小された外
径D3を有するオリフイス径決めピン36を打抜
き孔7内へ突入させた状態で、打抜き孔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D4を有する加圧パンチ33
と、この加圧パンチ33に相対向する加圧ピン3
5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、打抜き孔7の孔径D1をオリフイ
ス径決めピン36の外径D3にまで縮径してこの
オリフイス径決めピン36の外径D3と等しいオ
リフイス径D3を有するオリフイス6を成形す
る。 In this example, the pivot hole 3 is located between the bottom surface 3a of the pivot hole 3 recessed on one end side of the workpiece W3 and the bottom surface 4a of the oil hole 4 recessed on the other end side of the workpiece W3.
After punching a punched hole 7 that communicates with the oil hole 4, an orifice diaphragm pin 36 having an outer diameter D3 smaller than the outer diameter D1 of the punched hole 7 is inserted into the punched hole 7. , the cylindrical pressure receiving part 37 around the punched hole 7 is formed by a pressure punch 33 having an outer diameter D4 larger than the hole diameter D1 of the punched hole 7.
and a pressure pin 3 facing this pressure punch 33.
5 to bulge out a part of the cylindrical pressure receiving part 37 inwardly, and the hole diameter D1 of the punched hole 7 is reduced to the outer diameter D3 of the orifice diametric pin 36 to determine the orifice diameter. An orifice 6 having an orifice diameter D3 equal to the outer diameter D3 of the pin 36 is molded.
このため、オリフイス6を冷間圧造加工によつ
て成形してピボツト軸受Pを全冷間圧造加工工程
によつて製作することができ、オリフイス6の成
形精度を高めてオリフイス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
ヘツダー型プレス機の複数の加工ステージに対し
同時にセツ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、ピボツト軸受Pの1
個当りの製作時間を大幅に短縮してピボツト軸受
の生産性及び信頼性を高め、ピボツト軸受の製作
コストを大幅に低減し得る効果がある。 Therefore, the orifice 6 can be formed by cold heading and the pivot bearing P can be manufactured by the entire cold heading process, improving the forming precision of the orifice 6 and making the orifice 6 stable and efficient. In addition, the workpieces at each processing stage can be simultaneously set on multiple processing stages of a multi-stage header type press machine and processed sequentially and synchronously in each processing stage.
This has the effect of greatly shortening the manufacturing time per unit, increasing the productivity and reliability of the pivot bearing, and significantly reducing the manufacturing cost of the pivot bearing.
また、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の外径D4と、加圧ピン35
の外径D2とを、オリフイ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
イス径決めピン36の外径D3にまで縮径してオ
リフイス6を成形することができるので、任意の
オリフイス径D3を有するオリフイス6を容易か
つ正確に成形することができる。 Further, the inner diameter of the cylindrical pressure receiving part 37, that is, the hole diameter D1 of the punched hole 7, the outer diameter of the cylindrical pressure receiving part 37, that is, the outer diameter D4 of the pressure punch 33, and the pressure pin 35.
By setting the outer diameter D2 of the orifice corresponding to the orifice diameter, 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. The orifice 6 having an arbitrary orifice diameter D3 can be easily and accurately molded.
図面は本発明の一実施例を示すもので、第1図
A,Bはオリフイスの成形過程を順に示す要部の
拡大縦断面図、第2図はピボツト軸受の縦断面
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A,Bは打抜きステ
ージでの成形過程を順に示す要部の縦断面図、第
6図A,Bはオリフイ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A,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…ピボツト孔、4…油孔、6…オリフイス、
7…打抜き孔、33…加圧パンチ、35…加圧ピ
ン、36…オリフイス径決めピン、37…円筒状
受圧部、P…ピボツト軸受、D3…オリフイス
径。
The drawings show one embodiment of the present invention. Figures 1A and B are enlarged longitudinal sectional views of essential parts showing the orifice forming process in order, Figure 2 is a longitudinal sectional view of the pivot bearing, and Figure 3 is a longitudinal sectional view of the pivot bearing. Figures 4A and B are vertical cross-sectional views of the main parts of the press, showing the forming process in the bearing forming stage in order, and Figures 5 A and B show the forming process in the punching stage in order. Figures 6A and B are longitudinal sectional views of the main parts showing the forming process in the orifice forming stage in order, and Figures 7A, B, and C are longitudinal sectional views of the main parts shown.
2A and 2B are front views of a workpiece sequentially showing the process of forming the workpiece in a pre-processing stage. 3... Pivot hole, 4... Oil hole, 6... Orifice,
7... Punching hole, 33... Pressure punch, 35... Pressure pin, 36... Orifice diameter determining pin, 37... Cylindrical pressure receiving part, P... Pivot bearing, D3... Orifice diameter.
Claims (1)
面と、ワークの他端部側に凹設した油孔の底面と
の間に前記ピボツ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イス径決めピンを
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
加圧パンチに相対向する加圧ピンとで圧縮して前
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イス径決めピンの外径
にまで縮径してこのオリフイス径決めピンの外径
と等しいオリフイス径を有するオリフイスを成形
することを特徴とするピボツト軸受におけるオリ
フイスの成形方法。1. Punching a hole 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, which communicates the pivot hole and the oil hole. Then, with an orifice diaphragm pin having an outer diameter smaller than the diameter of the punched hole inserted into the punched hole, the cylindrical pressure receiving part around the punched hole is made smaller than the diameter of the punched hole. A pressure punch having an enlarged outer diameter and a pressure pin facing the pressure punch are used to compress a portion of the cylindrical pressure-receiving portion to bulge inward, and the diameter of the punched hole is adjusted to the diameter of the punched hole. 1. A method for forming an orifice in a pivot bearing, the method comprising forming an orifice having an orifice diameter equal to the outer diameter of the orifice diametric pin by reducing its diameter to the outer diameter of the orifice diametral pin.
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 JPH02224844A (en) | 1990-09-06 |
JPH033531B2 true 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) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011077182A1 (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
Also Published As
Publication number | Publication date |
---|---|
JPH02224844A (en) | 1990-09-06 |
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