JPS649503B2 - - Google Patents
Info
- Publication number
- JPS649503B2 JPS649503B2 JP15950382A JP15950382A JPS649503B2 JP S649503 B2 JPS649503 B2 JP S649503B2 JP 15950382 A JP15950382 A JP 15950382A JP 15950382 A JP15950382 A JP 15950382A JP S649503 B2 JPS649503 B2 JP S649503B2
- Authority
- JP
- Japan
- Prior art keywords
- boss
- flywheel
- wall
- fitting hole
- hole
- 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
- 239000002184 metal Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 description 10
- 238000000465 moulding Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/30—Flywheels
- F16F15/315—Flywheels characterised by their supporting arrangement, e.g. mountings, cages, securing inertia member to shaft
- F16F15/3153—Securing inertia members to the shafts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Description
【発明の詳細な説明】
本発明はフライホイール磁石回転子に用いるの
に好適なフライホイールを製造する方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a flywheel suitable for use in a flywheel magnet rotor.
内燃機関に取付けられる磁石発電機の回転子と
して、カツプ状のフライホイール本体にボス部を
取付けたフライホイールに永久磁石を取付けたフ
ライホイール磁石回転子が用いられている。この
種のフライホイールにボスを取付ける場合、従来
はボスの鍔部をリベツトによりフライホイール本
体に固定する方法がとられていたが、リベツトを
用いると部品点数が多くなる上に組立の自動化が
困難であるという欠点があつた。そこで最近にな
つて、ボスの一部を塑性変形することによりボス
に一体にかしめ部を形成して、該かしめ部とボス
の鍔部とでフライホイール本体の壁部を挾持した
状態でボスをフライホイール本体に結合する方法
が提案された（例えば特公昭56−22301号）。とこ
ろが、第１図に示すように、フライホイール本体
１′の壁部１０１′に設けた円形の孔１０２′に円
筒状のボス２′を嵌合させて、ボス２′の外周部に
形成したかしめ部２０３′を図示しない型により
壁部１０１′側に押圧した場合には、かしめ部２
０３′により圧潰される孔１０２′の周辺部の金属
が図示の矢印ａ，ｂの如く径方向の内側及び外側
の双方向に流れるため、ボス２′側に流れる金属
が不足して孔１０２′の内周とボス２′との間に隙
間ｇが生じ、ボスとフライホイール本体との結合
強度、特にフライホイールの回転方向に対する結
合強度が弱くなる欠点があつた。このような欠点
をなくすため、ボス及びこのボスが嵌合する孔の
断面形状を円形以外の形状（例えば多角形）にす
ることが提案されたが、この場合には、ボス及び
フライホイールを塑性変形で作る場合に型の形状
が複雑になる欠点があつた。特に断面多角形のボ
スを作る型のように角部を多く有する型の場合に
は、型もちが悪く、型の再研磨が頻繁に必要にな
つて面倒であつた。 A flywheel magnet rotor is used as a rotor for a magnet generator attached to an internal combustion engine, in which a permanent magnet is attached to a flywheel in which a boss is attached to a cup-shaped flywheel body. Conventionally, when attaching a boss to this type of flywheel, the flange of the boss was fixed to the flywheel body using rivets, but using rivets increases the number of parts and makes it difficult to automate assembly. It had the disadvantage of being. Therefore, recently, a part of the boss is plastically deformed to form a caulked part integrally with the boss, and the boss is held in a state where the wall of the flywheel body is held between the caulked part and the flange of the boss. A method of connecting it to the flywheel body was proposed (for example, Japanese Patent Publication No. 56-22301). However, as shown in FIG. 1, a cylindrical boss 2' is fitted into a circular hole 102' provided in a wall 101' of the flywheel body 1', and a hole formed on the outer periphery of the boss 2' is formed. When the caulked portion 203' is pressed against the wall portion 101' by a mold (not shown), the caulked portion 203'
Since the metal around the hole 102' crushed by the hole 102' flows in both directions, radially inward and outward as shown by the arrows a and b in the figure, there is not enough metal flowing toward the boss 2' and the hole 102' is crushed by the hole 102'. A gap g is formed between the inner periphery of the flywheel and the boss 2', which has the disadvantage that the bonding strength between the boss and the flywheel body, particularly in the direction of rotation of the flywheel, is weakened. In order to eliminate these drawbacks, it has been proposed to make the cross-sectional shape of the boss and the hole into which the boss fits into a shape other than a circle (for example, a polygon). There was a drawback that the shape of the mold was complicated when it was made by deformation. Particularly in the case of a mold having many corners, such as a mold for making a boss with a polygonal cross-section, the mold has poor retention and requires frequent re-polishing, which is troublesome.
本発明の目的は、単純な形状のボスを用いてし
かもボスとフライホイール本体との結合強度を高
めることができるようにしたフライホイールの製
造方法を提案することにある。 SUMMARY OF THE INVENTION An object of the present invention is to propose a method for manufacturing a flywheel that uses a boss with a simple shape and can increase the strength of the connection between the boss and the flywheel body.
本発明は、フライホイール本体のボスが取付け
られる壁部に形成したボス嵌合用孔にボスを嵌合
させて該ボスの一端に設けた鍔部をフライホイー
ル本体の一面に当接させ、ボスの他端側から前記
フライホイール本体の壁部に向けて変位する型に
より前記ボスの一部を塑性変形させて前記壁部の
他面の前記ボス嵌合用孔の周辺部に圧接するかし
め部を形成し、前記かしめ部と前記鍔部とにより
前記壁部を挾持した状態で前記フライホイール本
体とボスとを結合するフライホイールの製造方法
において、前記かしめ部を形成する前に前記フラ
イホイールの壁部の他面の前記かしめ部が係接す
る部分に隣接した領域に該かしめ部を取囲む環状
の溝を形成して該溝に環状に形成された金属流れ
規制用環状突起を係入させて前記壁部に形成した
前記ボス嵌合用孔の周辺部の金属の流れ方向を規
制する規制状態を作り、該規制状態下で前記ボス
の一部を前記壁部側に押圧して前記かしめ部を形
成すると同時に前記ボス嵌合用孔の周辺部を圧潰
することを特徴としたものである。 In the present invention, the boss is fitted into a boss fitting hole formed in a wall portion of the flywheel body to which the boss is attached, and a flange provided at one end of the boss is brought into contact with one surface of the flywheel body. A part of the boss is plastically deformed by a mold that is displaced from the other end toward the wall of the flywheel body to form a caulked portion that presses against the periphery of the boss fitting hole on the other side of the wall. In the method for manufacturing a flywheel, in which the flywheel main body and the boss are connected to each other while the wall portion is held between the caulking portion and the flange portion, the wall portion of the flywheel is bonded to the boss before forming the caulking portion. An annular groove surrounding the caulked portion is formed in a region adjacent to the portion of the other surface where the caulked portion engages, and an annular protrusion for regulating metal flow, which is formed in an annular shape, is inserted into the groove, thereby forming the wall. A regulating state is created to regulate the flow direction of metal around the boss fitting hole formed in the part, and a part of the boss is pressed against the wall part under the regulating state to form the caulked part. At the same time, the periphery of the boss fitting hole is crushed.
以下図面を参照して本発明の方法を詳細に説明
する。 The method of the present invention will be explained in detail below with reference to the drawings.
第２図は、本発明の方法により製造されたフラ
イホイールＦを示したもので、同図において１は
カツプ状に形成されたフライホイール本体であ
る。フライホイール本体１の底壁部１０１の中央
には円形のボス嵌合用孔１０２が形成され、この
孔１０２に円筒状のボス２が嵌合されている。ボ
ス２はその一端に鍔部２０１を一体に有し、この
鍔部２０１はフライホイール本体１の底壁部１０
１の一面（外面）に当接されている。ボス２の胴
部２０２の外周の一部が径方向の外側に拡大する
ように塑性変形されてかしめ部２０３が形成さ
れ、このかしめ部２０３はフライホイールの底壁
部１０１の他面（内面）に係接されている。かし
め部２０３によりボス嵌合用孔１０２の周辺部が
圧潰され、かしめ部２０３と鍔部２０１とにより
孔１０２の周辺部が挾持された状態でボス２とフ
ライホイール本体１とが結合されている。ボスと
フライホイール本体との間の回り止めを更に確実
に図るため、鍔部２０１に設けられた複数の孔２
０４にそれぞれ、底壁部１０１に形成された打出
部１０３が係入されている。複数の孔２０４及び
打出部１０３は周方向に等角度間隔をあけて設け
られている。フライホイールの底壁部のかしめ部
２０３が係接する部分に隣接した領域に、かしめ
部２０３を取囲む、孔１０２と同心的な断面Ｖ字
状の環状溝１０４が、打出部１０３よりも内側に
位置するように設けられ、底壁部１０１の打出部
１０３よりも外側の部分の両面の相対応する位置
にも、孔１０２と同心的な断面Ｖ字状の環状溝１
０５，１０６が形成されている。ボス２の胴部２
０２内にはテーパが付けられた軸嵌合孔２０５が
形成され、この軸嵌合孔に図示しない回転軸のテ
ーパ部が嵌着されるようになつている。このフラ
イホイールを用いて磁石回転子を構成する場合に
は、フライホイール本体１の周壁部１０７の内周
に永久磁石３が固着される。 FIG. 2 shows a flywheel F manufactured by the method of the present invention, in which numeral 1 denotes a flywheel body formed in a cup shape. A circular boss fitting hole 102 is formed in the center of the bottom wall portion 101 of the flywheel body 1, and the cylindrical boss 2 is fitted into this hole 102. The boss 2 integrally has a flange 201 at one end, and this flange 201 is attached to the bottom wall 10 of the flywheel body 1.
It is in contact with one surface (outer surface) of 1. A part of the outer periphery of the body portion 202 of the boss 2 is plastically deformed so as to expand outward in the radial direction to form a caulked portion 203, and this caulked portion 203 is formed on the other surface (inner surface) of the bottom wall portion 101 of the flywheel. is connected to. The periphery of the boss fitting hole 102 is crushed by the caulking part 203, and the boss 2 and the flywheel body 1 are coupled with the periphery of the hole 102 being held between the caulking part 203 and the flange 201. In order to further ensure rotation prevention between the boss and the flywheel body, a plurality of holes 2 are provided in the flange 201.
04, respectively, are engaged with protruding portions 103 formed on the bottom wall portion 101. The plurality of holes 204 and the punched portions 103 are provided at equal angular intervals in the circumferential direction. An annular groove 104 having a V-shaped cross section and concentric with the hole 102 and surrounding the caulking part 203 is located inside the protruding part 103 in a region adjacent to the part of the bottom wall of the flywheel that is engaged with the caulking part 203. An annular groove 1 having a V-shaped cross section and concentric with the hole 102 is provided at corresponding positions on both sides of the portion of the bottom wall portion 101 outside the punched portion 103.
05, 106 are formed. Boss 2 body 2
A tapered shaft fitting hole 205 is formed in the shaft fitting hole 205, and a tapered portion of a rotating shaft (not shown) is fitted into this shaft fitting hole. When constructing a magnet rotor using this flywheel, permanent magnets 3 are fixed to the inner periphery of the peripheral wall portion 107 of the flywheel body 1.
次に第３図Ａ乃至Ｃを参照して上記フライホイ
ールを製造する本発明の方法を説明する。第３図
において４は基台４０１と該基台４０１の上に固
定された型部４０２とを有する雌型で、型部４０
２にはフライホイール本体の外径に等しい内径を
有する型孔４０３が設けられ、この型孔４０３の
上端開口部周縁にはテーパ部４０４が形成されて
いる。型孔４０３内には、雌型４と同質の材料か
らなるリング状のパツト５が摺動自在に嵌合さ
れ、このパツト５の下端は雌型４の基台４０１を
摺動自在に貫通して設けられた複数のクツシヨン
ピン６により支持されている。パツト５の内周の
下端には径方向の内側に突出する突条部５０１が
形成され、パツト５内に嵌合されたボス保持台７
がこの突条部５０１に係止されている。またパツ
ト５の上端面に断面Ｖ字状の環状突起（リツジ）
５０２が設けられている。雌型の基台４０１の中
央には円柱状の突出部４０５が設けられ、この突
出部４０５の外周と型孔４０３の内周との間にパ
ツト５の下端が嵌合し得る環状の溝４０６が形成
されている。加工時の面精度を高め、且つ加工さ
れた製品の取出しを可能にするため、クツシヨン
ピン６には常に下方から上方に向う向きの圧力が
加えられている。パツト５内のボス保持台７上に
は絞り加工により作られたボスの半加工品２０が
保持され、このボス半加工品はその下端の鍔部２
０１の外周がパツト５の内周に嵌合されて位置決
めされている。ボス半加工品２０はその胴部の鍔
部２０１寄りの半部に大径部２０６を有し、大径
部２０６とその上方の小径部２０７との間にはテ
ーパ部２０８が形成されている。鍔部２０１には
複数の孔２０４が予め形成されている。最初パツ
ト５はその上端面が型部４０２の上端面と面一に
なる位置にあり、このパツト５の上端面の環状突
起５０２上に軟鋼板等の絞り加工が可能な材料か
らなる円板状のフライホイール素材１０が載せら
れている。フライホイール素材１０の中央部には
ボス半加工品の胴部の大径部２０６が嵌合し得る
円形のボス嵌合用孔１０２が形成され、ボス半加
工品の小径部２０７がこの孔１０２にゆるく嵌合
されている。 Next, the method of manufacturing the flywheel of the present invention will be described with reference to FIGS. 3A to 3C. In FIG. 3, 4 is a female mold having a base 401 and a mold part 402 fixed on the base 401.
2 is provided with a mold hole 403 having an inner diameter equal to the outer diameter of the flywheel body, and a tapered portion 404 is formed at the periphery of the upper end opening of this mold hole 403. A ring-shaped part 5 made of the same material as the female mold 4 is slidably fitted into the mold hole 403, and the lower end of this part 5 slidably passes through the base 401 of the female mold 4. It is supported by a plurality of cushion pins 6 provided at the same time. A protrusion 501 that protrudes radially inward is formed at the lower end of the inner circumference of the part 5, and a boss holding base 7 fitted inside the part 5 is formed.
is locked to this protrusion 501. In addition, there is an annular projection (ridge) with a V-shaped cross section on the upper end surface of the part 5.
502 is provided. A cylindrical protrusion 405 is provided at the center of the female mold base 401, and an annular groove 406 into which the lower end of the part 5 can fit is formed between the outer circumference of the protrusion 405 and the inner circumference of the mold hole 403. is formed. In order to improve the surface accuracy during processing and to enable removal of the processed product, pressure is always applied to the cushion pin 6 from below to above. A boss semi-finished product 20 made by drawing is held on a boss holding table 7 in the part 5, and this boss semi-processed product has a flange 2 at the lower end thereof.
The outer periphery of the part 01 is fitted into the inner periphery of the part 5 for positioning. The boss blank 20 has a large diameter part 206 in the half of its body near the flange 201, and a tapered part 208 is formed between the large diameter part 206 and the small diameter part 207 above it. . A plurality of holes 204 are formed in the collar portion 201 in advance. Initially, the part 5 is in a position where its upper end surface is flush with the upper end surface of the mold part 402, and on the annular protrusion 502 on the upper end surface of the part 5 is a disc-shaped material made of a material that can be drawn, such as a mild steel plate. A flywheel material 10 is placed thereon. A circular boss fitting hole 102 into which the large diameter portion 206 of the body of the boss blank can fit is formed in the center of the flywheel material 10, and the small diameter portion 207 of the boss blank fits into this hole 102. Fitted loosely.
雌型４の上方には、雄型８が配置され、この雄
型８は図示しない支持機構により型孔４０３と同
軸的に且つ上下動自在に支持されている。雄型８
の外径ｒは雌型４の型孔４０３の内径よりもフラ
イホイール本体１の周壁部の厚味分だけ小さく設
定され、その中央部にはボス半加工品２０の小径
部２０７が嵌合し得る孔８０１が設けられてい
る。孔８０１の下端開口部にはボス半加工品２０
の大径部２０６を変形して前記かしめ部２０３を
形成するための大径部８０２が形成されている。
また孔８０１の周囲には、小径の孔８０３が複数
個設けられ、これらの孔にはそれぞれ、ボスの鍔
部２０１の孔２０４に係入する打出部１０３を形
成するための打出ピン９が上下動自在に嵌合され
ている。そして雄型８の下端面の打出ピン９より
内側の領域に断面Ｖ字状の金属流れ規制用環状突
起８０４が形成され、打出ピン９より外側の領域
の前記パツトの環状突起５０２に対向する位置に
同じく断面Ｖ字状のフライホイール素材位置決め
用環状突起８０５が形成されている。 A male mold 8 is arranged above the female mold 4, and this male mold 8 is supported coaxially with the mold hole 403 and movable up and down by a support mechanism (not shown). male type 8
The outer diameter r is set smaller than the inner diameter of the mold hole 403 of the female mold 4 by the thickness of the peripheral wall of the flywheel body 1, and the small diameter portion 207 of the boss blank 20 is fitted into the center thereof. A hole 801 is provided. A boss blank 20 is provided at the lower end opening of the hole 801.
A large diameter portion 802 for forming the caulked portion 203 is formed by deforming the large diameter portion 206 of.
Further, a plurality of small-diameter holes 803 are provided around the hole 801, and each of these holes has an ejection pin 9 located above and below for forming an ejection portion 103 that engages in the hole 204 of the flange portion 201 of the boss. They are movably fitted. A metal flow regulating annular protrusion 804 having a V-shaped cross section is formed on the lower end surface of the male mold 8 in a region inside the ejecting pin 9, and a position facing the annular protrusion 502 of the part in the region outside the ejecting pin 9. A flywheel material positioning annular protrusion 805 having a V-shaped cross section is formed in the same manner.
上記第３図に示した装置を用いて本発明を実施
する場合には、ボス半加工品２０及びフライホイ
ール素材１０をセツトした後雄型８を第３図Ａに
示す位置から下降させる。この雄型の下降の過程
で先ず同図Ｂに示すように雄型８が型孔４０３内
に嵌入してフライホイール素材１０をカツプ状の
フライホイールの形に絞り加工する。このとき環
状突起５０２，８０４及び８０５がフライホイー
ル素材１０に食い込んで断面Ｖ字状の環状溝を形
成し、フライホイール本体の絞り加工時に素材が
移動してボス嵌合用の孔１０２がつぶれるのを防
止する。雄型８が更に下降すると雄型８の大径部
８０２がボス半加工品２０の大径部２０７に係合
して該大径部２０７を塑性変形させるとともに、
フライホイール本体１の成形を更に進め、雄型８
が第３図Ｃに示す最終位置まで下降した状態で、
フライホイール本体１の成形とボス２のかしめ部
２０３の成形とを完了する。かしめ部２０３の成
形の最終過程において、該かしめ部２０３がフラ
イホイール本体１のボス嵌合用孔１０２の周辺部
を圧潰するが、このとき、雄型８の環状突起８０
４がかしめ部２０３を取囲む環状溝内に係入した
状態にあるので、第４図に矢印ａで示したように
ボス嵌合用孔１０２の周辺部の金属の流れ方向
が、径方向の内側に向う方向に規制され、径方向
の外側には金属が殆んど流れない。従つてボス嵌
合用孔１０２の内周面をボス２の外周に圧接させ
ることができ、ボス嵌合用孔１０２とボス２との
間に間隙が生じるのを防ぐことができる。 When carrying out the present invention using the apparatus shown in FIG. 3, the male mold 8 is lowered from the position shown in FIG. 3A after the boss blank 20 and flywheel material 10 are set. In the process of lowering the male mold, the male mold 8 first fits into the mold hole 403 as shown in FIG. At this time, the annular protrusions 502, 804, and 805 bite into the flywheel material 10 to form an annular groove with a V-shaped cross section, thereby preventing the material from moving and crushing the boss-fitting hole 102 during drawing of the flywheel body. To prevent. When the male mold 8 further descends, the large diameter portion 802 of the male mold 8 engages with the large diameter portion 207 of the boss blank 20, plastically deforming the large diameter portion 207, and
The molding of the flywheel body 1 was further progressed, and the male mold 8
is lowered to the final position shown in Figure 3C,
The molding of the flywheel body 1 and the caulking portion 203 of the boss 2 are completed. In the final process of forming the caulking part 203, the caulking part 203 crushes the peripheral part of the boss fitting hole 102 of the flywheel body 1, but at this time, the annular protrusion 80 of the male mold 8
4 is in a state of being engaged in the annular groove surrounding the caulked portion 203, so that the flow direction of the metal around the boss fitting hole 102 is radially inner, as shown by arrow a in FIG. The metal is regulated in the direction toward the radial direction, and almost no metal flows outward in the radial direction. Therefore, the inner circumferential surface of the boss fitting hole 102 can be brought into pressure contact with the outer circumference of the boss 2, and it is possible to prevent a gap from forming between the boss fitting hole 102 and the boss 2.
雄型８が最終位置まで下降した後打出ピン９が
下降して打出部１０３が形成され、この打出部が
ボスの鍔部２０１の孔２０４に係入される。この
場合、第６図に示すように、打出ピン９の外径d1
を鍔部２０１の孔２０４の内径d2よりも大きくし
ておくと、剪断力が作用する領域の幅l1が、第５
図に示すように打出ピン９の外径d1′を孔２０４
の内径d2に等しくした場合の剪断力作用領域の幅
l2よりも大きくなるため、打出部１０３の高さｈ
を高くとつてもフライホイール本体の底壁部１０
１が破断することがない。したがつて打出部１０
３を孔２０４内により深く係入することができ、
フライホイールの底壁部１０１とボスの鍔部２０
１との結合強度を高くすることができる。 After the male mold 8 has descended to the final position, the ejecting pin 9 is lowered to form a ejecting portion 103, which is inserted into the hole 204 of the collar portion 201 of the boss. In this case, as shown in FIG. 6, the outer diameter d 1 of the ejection pin 9
By making d2 larger than the inner diameter d2 of the hole 204 in the flange 201, the width l1 of the area on which the shearing force acts will be the fifth
As shown in the figure, the outer diameter d 1 ' of the ejection pin 9 is connected to the hole 204.
The width of the shear force acting area when equal to the inner diameter d 2 of
Since it is larger than l 2 , the height h of the ejection part 103
The bottom wall part 10 of the flywheel body is high.
1 will not break. Therefore, the ejection part 10
3 can be inserted deeper into the hole 204,
Flywheel bottom wall 101 and boss flange 20
The bonding strength with 1 can be increased.
上記の実施例では、フライホイール本体の成形
とボスの取付けとを同じ工程で行なうようにした
が、別工程で成形したフライホイール本体の底壁
部のボス嵌合用孔にボスを嵌合させ、ボスの一部
を変形することによりかしめ部を形成してボスと
フライホイールとを一体に結合する場合にも本発
明を適用できる。 In the above embodiment, the molding of the flywheel body and the attachment of the boss were performed in the same process, but the boss was fitted into the boss fitting hole in the bottom wall of the flywheel body, which was molded in a separate process. The present invention can also be applied to a case where a caulked portion is formed by deforming a portion of the boss to integrally connect the boss and the flywheel.
以上のように本発明によれば、かしめ部を形成
する前にフライホイールの壁部の他面のかしめ部
が係接する部分に隣接した領域に該かしめ部を取
囲む環状の溝を形成して該溝に環状に形成された
金属流れ規制用環状突起を係入させて壁部に形成
したボス嵌合用孔の周辺部の金属の流れ方向を規
制する規制状態を作り、該規制状態下でボスの一
部を壁部側に押圧してかしめ部を形成すると同時
にボス嵌合用孔の周辺部を圧潰するようにしたの
で、かしめ部を形成する際に圧潰されたボス嵌合
用孔の周辺部の金属が径方向外側へ流れるのを防
止して金属を径方向内側に流すことができる。し
たがつて本発明によれば、ボス嵌合用孔の内周と
ボスとの間に隙間を生じさせることなくボスをフ
ライホイール本体に一体に結合することができ、
ボスとフライホイール本体との結合強度を高くす
ることができる利点がある。 As described above, according to the present invention, before forming the caulked portion, an annular groove surrounding the caulked portion is formed in a region adjacent to the portion of the wall of the flywheel on which the caulked portion engages. A metal flow regulating annular protrusion formed in an annular shape is inserted into the groove to create a regulating state that regulates the flow direction of metal around the boss fitting hole formed in the wall, and under this regulating state, the boss The periphery of the boss fitting hole was crushed when forming the caulked part by pressing a part of the hole against the wall, so that the periphery of the boss fitting hole that was crushed when forming the caulked part was Metal can be prevented from flowing radially outward and metal can flow radially inward. Therefore, according to the present invention, the boss can be integrally coupled to the flywheel body without creating a gap between the inner periphery of the boss fitting hole and the boss,
This has the advantage that the strength of the connection between the boss and the flywheel body can be increased.
第１図は従来の方法により製造されたフライホ
イールのフライホイール本体とボスとの結合部付
近を示す断面図、第２図は本発明の方法により製
造されたフライホイールの縦断面図、第３図Ａ乃
至Ｃは本発明の方法を実施する成形装置の要部を
示したもので同図Ａは雄型が下降する前の状態を
示す断面図、同図Ｂ及びＣはそれぞれ雄型が下降
する途中の状態及び雄型が最終位置まで下降した
状態を示す断面図である。第４図は本発明の方法
により製造されたフライホイールのフライホイー
ル本体とボスとの結合部付近の状態を示す断面
図、第５図及び第６図は第３図Ａ乃至Ｃに示した
装置によりボスをフライホイール本体に結合する
場合の、打出ピンの径と該打出ピンにより打出し
得る打出部の高さとの関係を示す断面図である。
１……フライホイール本体、１０１……底壁部
（ボスが取付けられる壁部）、１０２……ボス嵌合
用孔、１０４……環状溝、２……ボス、２０１…
…鍔部、２０３……かしめ部、４……雌型、８…
…雄型、８０４……金属流れ規制用環状突起、１
０……フライホイール素材、２０……ボス半加工
品。
FIG. 1 is a cross-sectional view showing the vicinity of the joint between the flywheel body and the boss of a flywheel manufactured by a conventional method, FIG. 2 is a longitudinal cross-sectional view of a flywheel manufactured by the method of the present invention, and FIG. Figures A to C show the main parts of a molding apparatus for carrying out the method of the present invention. Figure A is a cross-sectional view showing the state before the male mold is lowered, and Figures B and C are each a cross-sectional view showing the state before the male mold is lowered. FIG. 4 is a cross-sectional view showing a state in the middle of the process and a state in which the male mold has been lowered to the final position. FIG. 4 is a sectional view showing the state of the flywheel manufactured by the method of the present invention near the joint between the flywheel body and the boss, and FIGS. 5 and 6 are the apparatus shown in FIGS. 3A to C. FIG. 3 is a cross-sectional view showing the relationship between the diameter of the ejecting pin and the height of the ejecting portion that can be ejected by the ejecting pin when the boss is coupled to the flywheel body by the ejecting pin. DESCRIPTION OF SYMBOLS 1... Flywheel body, 101... Bottom wall part (wall part to which the boss is attached), 102... Boss fitting hole, 104... Annular groove, 2... Boss, 201...
...Flame part, 203...Crimped part, 4...Female type, 8...
...male type, 804 ... annular projection for metal flow regulation, 1
0... Flywheel material, 20... Boss semi-finished product.
Claims (1)
部に形成したボス嵌合用孔にボスを嵌合させて該
ボスの一端に設けた鍔部を前記フライホイール本
体の一面に当接させ、前記ボスの他端側から前記
フライホイール本体の壁部に向けて変位する型に
より前記ボスの一部を塑性変形させて前記壁部の
他面の前記孔の周辺部に圧接するかしめ部を形成
し、前記かしめ部と前記鍔部とにより前記壁部を
挟持した状態で前記フライホイール本体とボスと
を結合するフライホイールの製造方法において、 前記かしめ部を形成する前に前記フライホイー
ルの壁部の他面の前記かしめ部が係接する部分に
隣接した領域に該かしめ部を取囲む環状の溝を形
成して該溝に環状に形成された金属流れ規制用環
状突起を係入させて前記壁部に形成した前記ボス
嵌合用孔の周辺部の金属の流れ方向を規制する規
制状態を作り、 該規制状態下で前記ボスの一部を前記壁部側に
押圧して前記かしめ部を形成すると同時に前記ボ
ス嵌合用孔の周辺部を圧潰することを特徴とする
フライホイールの製造方法。[Claims] 1. Fitting the boss into a boss fitting hole formed in a wall portion of the flywheel body to which the boss is attached, and bringing a flange provided at one end of the boss into contact with one surface of the flywheel body. and a caulking portion that plastically deforms a part of the boss by a mold that is displaced from the other end side of the boss toward the wall of the flywheel main body to press against a peripheral portion of the hole on the other side of the wall. In the method for manufacturing a flywheel, the flywheel main body and boss are connected to each other with the wall portion sandwiched between the caulking portion and the flange portion. An annular groove surrounding the caulked portion is formed in a region adjacent to the portion of the other surface of the wall that is engaged with the caulked portion, and a metal flow regulating annular protrusion formed in an annular shape is inserted into the groove. A regulating state is created to regulate the flow direction of metal around the boss fitting hole formed in the wall, and under the regulating state, a part of the boss is pressed toward the wall to close the caulking part. A method for manufacturing a flywheel, comprising crushing a peripheral portion of the boss fitting hole at the same time as forming the boss fitting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15950382A JPS5950249A (en) | 1982-09-16 | 1982-09-16 | Manufacturing method of flywheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15950382A JPS5950249A (en) | 1982-09-16 | 1982-09-16 | Manufacturing method of flywheel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5950249A JPS5950249A (en) | 1984-03-23 |
| JPS649503B2 true JPS649503B2 (en) | 1989-02-17 |
Family
ID=15695188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15950382A Granted JPS5950249A (en) | 1982-09-16 | 1982-09-16 | Manufacturing method of flywheel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5950249A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220164994A (en) * | 2021-06-07 | 2022-12-14 | 한국항공우주연구원 | Drone and drone anti-torque compensation method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5622301A (en) * | 1979-07-31 | 1981-03-02 | Sanshin Kagaku Kogyo Kk | Coagulant for latex |
-
1982
- 1982-09-16 JP JP15950382A patent/JPS5950249A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220164994A (en) * | 2021-06-07 | 2022-12-14 | 한국항공우주연구원 | Drone and drone anti-torque compensation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5950249A (en) | 1984-03-23 |
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