JPH03198941A - Manufacture of boss part of rotary body - Google Patents
Manufacture of boss part of rotary bodyInfo
- Publication number
- JPH03198941A JPH03198941A JP33669689A JP33669689A JPH03198941A JP H03198941 A JPH03198941 A JP H03198941A JP 33669689 A JP33669689 A JP 33669689A JP 33669689 A JP33669689 A JP 33669689A JP H03198941 A JPH03198941 A JP H03198941A
- Authority
- JP
- Japan
- Prior art keywords
- boss
- die
- cap
- manufacture
- boss part
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000010273 cold forging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Forging (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、薄い鋼板にて構成され、かつ回転中心部に回
転軸に嵌合するボス部を有する回転体のボス部の製造方
法に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for manufacturing a boss portion of a rotating body, which is made of a thin steel plate and has a boss portion fitted to a rotating shaft at the center of rotation. It is.
回転軸に取付けるプーリボスあるいはプーリ等において
、そのボス部にセレーションやキー溝等の機械加工ある
いはブローチ加工し、また回転軸側にも同様の加工を施
し、この双方を嵌合組付けている。また近年冷間鍛造法
では、ギヤやスプライン等を一体に仕上げてしまうもの
もある。In the pulley boss or pulley attached to the rotating shaft, the boss portion is machined or broached to have serrations, key grooves, etc., and the same process is applied to the rotating shaft side, and both are fitted and assembled. Furthermore, in recent years, cold forging has been used to produce gears, splines, etc. in one piece.
しかし、圧延鋼板等の薄い鋼板にて構成されるブーり等
の回転体ではそのボス部の製造は難しく、従来は、第１
１図に示すように鋼板にて構成された本体ａの回転中心
部に別のボス部材すを溶接あるいはカシメにより接合し
、その後このボス部材の円周面Ｃにセレーションやキー
溝加工を施していた。However, it is difficult to manufacture the boss part of a rotating body such as a boar made of thin steel plates such as rolled steel plates, and conventionally, the first
As shown in Figure 1, another boss member is joined by welding or caulking to the rotational center of the main body a made of a steel plate, and then serrations and key grooves are processed on the circumferential surface C of this boss member. Ta.
上記従来のボス部の製造方法では、回転体の本体ａの成
形、ボス部材す単体の製造、本体ａにボス部材すの接合
、ボス部材すの内面加工と多くの工程を必要としてその
製造コストが高かった。The conventional boss manufacturing method described above requires many steps such as molding the main body a of the rotating body, manufacturing the boss member alone, joining the boss member to the main body a, and processing the inner surface of the boss member, which increases the manufacturing cost. was high.
また上記従来の製造方法ではボス部材すは鋼板製の本体
ａとは別部材であることにより、このボス部材すの質量
がどうしても大きくなり、回転体全体の重量の軽減に悪
影響を与えていた。Further, in the conventional manufacturing method described above, since the boss member is a separate member from the main body a made of a steel plate, the mass of the boss member inevitably becomes large, which has an adverse effect on reducing the weight of the entire rotating body.
本発明は上記のことにかんがみなされたちの殆どプレス
加工だけで、しかも回転体の本体を構成する鋼板で、こ
れと一体状にしてボス部を構成でき、その製造工程が極
めて簡素化されてコストを低減でき、またこのボス部が
他の部材による質量の増加がなくなり、回転体全体の軽
量化を図ることができる。そしてさらに鋼板にて構成さ
れるボス部の肉厚を他の部分より厚くすることができる
ことにより、ボス部に所定の強度を得ることができるよ
うにした回転体のボス部の製造方法を提供することを目
的とするものである。In view of the above, the present invention allows the boss portion to be formed integrally with the steel plate that constitutes the main body of the rotating body by using almost only press processing, which greatly simplifies the manufacturing process and reduces costs. This also eliminates the increase in mass of this boss portion due to other members, making it possible to reduce the weight of the entire rotating body. Furthermore, there is provided a method for manufacturing a boss part of a rotating body in which a predetermined strength can be obtained in the boss part by making the wall thickness of the boss part made of a steel plate thicker than other parts. The purpose is to
上記目的を達成するために、本発明に係る回転体のボス
部の製造方法は、薄い鋼板にて構成された本体の中央部
にボス部を有する回転体において、上記鋼板の中央部を
帽状に形成した後、この帽状部を、この帽状部の反対側
で、かつ帽状部より小径の孔型内に押し込むと共に、中
心部に棒部材を押し込んで、ボス部を他の部分より肉厚
にすると共に、このボス部の内周面を成形する
〔作 用〕
上記製造方法によれば、殆どプレス加工だけで、しかも
回転体の本体を構成する鋼板で、これと一体状にしてボ
ス部が製造される。In order to achieve the above object, the method for manufacturing a boss portion of a rotating body according to the present invention is such that, in a rotating body having a boss portion at the center of a main body made of a thin steel plate, the center portion of the steel plate is shaped like a cap. After forming the cap, the cap is pushed into a hole on the opposite side of the cap that has a smaller diameter than the cap, and a rod member is pushed into the center to separate the boss from the other parts. In addition to making the wall thicker, the inner circumferential surface of this boss part is also formed. [Function] According to the above manufacturing method, only press working is required, and moreover, it is made integral with the steel plate that constitutes the main body of the rotating body. A boss portion is manufactured.
第１図から第６図は本発明の成形順序を示すもので、第
１図において、１は薄い鋼板からなる円板状の第１素材
であり、この素材１の中心部には小孔２が設けられてい
る。1 to 6 show the forming order of the present invention. In FIG. 1, 1 is a disc-shaped first material made of a thin steel plate, and a small hole 2 is formed in the center of this material 1. is provided.
上記素材１を第２図に示すように、上型３と下型４によ
り中心部を帽状に膨出成形して第２素材１ａを得る。As shown in FIG. 2, the material 1 is bulged into a cap shape at the center using an upper mold 3 and a lower mold 4 to obtain a second material 1a.
このとき、上型３と第１素材１との間の空気は小孔２よ
り下型４側へ排出される。At this time, air between the upper mold 3 and the first material 1 is discharged from the small holes 2 to the lower mold 4 side.
次に、上記第２素材１ａを第３図（Ａ）、第４図（Ａ）
に示すように、上型３ａと下型４ａにて第２素材１ａの
中心部のボス部を形成する膨出部分だけを残してその周
囲を挾持する（第３図（Ａ））。このときの下型の内径
ｄは膨出側を押さえる上型の内径りより小径になってい
る。Next, the second material 1a is shown in FIGS. 3(A) and 4(A).
As shown in FIG. 3, the upper mold 3a and the lower mold 4a sandwich the second material 1a around the periphery of the second material 1a, leaving only the bulge forming the boss at the center (FIG. 3(A)). At this time, the inner diameter d of the lower mold is smaller than the inner diameter of the upper mold that presses the bulging side.
次に上記小孔２より大径のピン５を有する中型６にて上
記第２素材１ａの膨出部分を反対側へ押し出す（第４図
（Ａ））。Next, the bulging portion of the second material 1a is pushed out to the opposite side using a medium die 6 having a pin 5 having a larger diameter than the small hole 2 (FIG. 4(A)).
これにより、膨出部は下型の内径内に押し込められると
共に、ピン５にて小孔２より大径の孔７が作られ、これ
の作用により、他の部分より厚肉で、かつ軸方向に所定
の高さを有するボス部８が形成された第３素材１ｂが得
られる。As a result, the bulging part is pushed into the inner diameter of the lower mold, and a hole 7 with a larger diameter than the small hole 2 is made by the pin 5, which makes the bulge thicker than other parts and in the axial direction. A third material 1b is obtained in which a boss portion 8 having a predetermined height is formed.
このとき、第１素材１の中心部の小孔２は必ずしも必要
ない。At this time, the small hole 2 in the center of the first material 1 is not necessarily required.
次にこの第３素材１ｂを第５図に示すように、ボス部８
の内側に、ボス部８の内径部の形状を有するダイ９及び
上型３ｂにてボス部８の内径部と外径部とを成形する。Next, as shown in FIG. 5, this third material 1b is
The inner diameter part and the outer diameter part of the boss part 8 are molded inside using a die 9 having the shape of the inner diameter part of the boss part 8 and an upper mold 3b.
このとき、第３素材１ｂは下型４ｂに対しである程度の
位置決め、あるいは成形により肉かにげないように規制
されるが、その方法としては第５図に示すように外周部
を支持してもよく、あるいは、第６図に示すようにボス
部８の内径部を支持するようにしてもよい。第７図は外
径部を支持して成形した成形品を示し、この場合、軸方
向に■で示すようにダレが発生することがある。また第
８図は内径部を支持して成形した成形品を示す。At this time, the third material 1b is positioned to a certain extent with respect to the lower mold 4b or molded to prevent the material from becoming thick, but this can be done by supporting the outer periphery as shown in FIG. Alternatively, the inner diameter portion of the boss portion 8 may be supported as shown in FIG. FIG. 7 shows a molded product that is molded with the outer diameter portion supported, and in this case, sag may occur in the axial direction as shown by ■. Moreover, FIG. 8 shows a molded product that is molded with support on the inner diameter part.
なお上記第５図に示す成形作動において、ダイ９をボス
部８に貫通させてもよい。In addition, in the molding operation shown in FIG. 5 above, the die 9 may be passed through the boss portion 8.
上記ダイ９の外周面にはセレーションあるいはキー用の
突起が形成してあり、このダイ９にてボス部８の内径部
が所定の形状に形成される。Serrations or key projections are formed on the outer circumferential surface of the die 9, and the die 9 forms the inner diameter portion of the boss portion 8 into a predetermined shape.
なお上記実施例では、第４図（Ａ）に示す状態から第５
図あるいは第６図に示す工程を経て成形品を得るように
した例を示したが、第３図（Ｂ）、第４図（Ｂ）に示す
ように、第２素材１ａの帽状部を下型４ａ′の凹部１０
内に押し込め、中型６′のピン５′にて直接ボス部の穴
１１を成形するようにしてもよい。この場合、中型６′
を数回下動じてピン５′にてしごきをかけ、穴径の精度
を出すようにする。この場合の穴１１は円筒状に成形さ
れるので、このボス部８と軸との結合には第１０図に示
すように穴１１を軸１２に圧入するか、第９図に示すよ
うに、ボス部８に別のボス部材１３を固着し、これを軸
１２′に圧入する。この第９図に示す構造のものは、別
のボス部材１３にてボス部８を有する回転体のバランス
が得られると共に、軸１２′との嵌合、しめ代を安定す
ることができる。In the above embodiment, from the state shown in FIG. 4(A) to the state shown in FIG.
Although we have shown an example in which a molded product is obtained through the steps shown in Fig. 3 or Fig. 6, as shown in Fig. 3 (B) and Fig. 4 (B), the cap-shaped part of the second material 1a is Recess 10 of lower mold 4a'
Alternatively, the hole 11 of the boss portion may be directly formed using the pin 5' of the medium mold 6'. In this case, medium 6'
Move down several times and squeeze with pin 5' to obtain the accuracy of the hole diameter. Since the hole 11 in this case is formed into a cylindrical shape, the boss portion 8 and the shaft can be connected by press-fitting the hole 11 into the shaft 12 as shown in FIG. 10, or by press-fitting the hole 11 into the shaft 12 as shown in FIG. Another boss member 13 is fixed to the boss portion 8 and press-fitted onto the shaft 12'. With the structure shown in FIG. 9, the rotating body having the boss portion 8 can be balanced by the use of another boss member 13, and the fit and interference with the shaft 12' can be stabilized.
本発明によれば、殆どプレス加工だけで、しかも回転体
の本体を構成する鋼板で、これと−体状にしてボス部８
を構成でき、その製造工程を従来のものと比較して極め
て簡素化されて製造コストを低減することができる。ま
たこのボス部８が他の部材による質量の増加がなくなり
、回転体全体の軽量化を図ることができる。そしてさら
に鋼板にて構成されるボス部８の肉厚を他の部分より厚
くすることができることにより、ボス部８に所定の強度
を得ることができる。According to the present invention, the boss portion 8 can be formed into a body shape by using a steel plate that constitutes the main body of the rotary body by almost only press working.
can be constructed, and its manufacturing process can be extremely simplified and manufacturing costs can be reduced compared to conventional ones. Further, the mass of the boss portion 8 does not increase due to other members, and the weight of the entire rotating body can be reduced. Further, by making the wall thickness of the boss portion 8 made of a steel plate thicker than other parts, a predetermined strength can be obtained in the boss portion 8.
第１図から第６図は本発明方法の工程順序を示す断面図
、第７図、第８図は成形品を示す断面図、第９図、第１
０図は成形品の使用状態の例を示す断面図である。第１
１図は従来の回転体のボス部を示す断面である。
１．１ａ、ｌｂは素材、３，３ａ、３ｂは上型、４，４
ａ、４ａ’ 、４ｂは下型、５．５′はピン、中型６．
６’ 、８はボス部、９はダイ。Figures 1 to 6 are cross-sectional views showing the process order of the method of the present invention, Figures 7 and 8 are cross-sectional views showing molded products, and Figures 9 and 1.
FIG. 0 is a cross-sectional view showing an example of a molded product in use. 1st
FIG. 1 is a cross section showing a boss portion of a conventional rotating body. 1.1a, lb are the materials, 3, 3a, 3b are the upper molds, 4, 4
a, 4a', 4b are the lower mold, 5.5' is the pin, and the middle mold 6.
6', 8 is the boss part, 9 is the die.
Claims (1)
回転体において、上記鋼板の中央部を帽状に形成した後
、この帽状部を、この帽状部の反対側で、かつ帽状部よ
り小径の孔型内に押し込むと共に、中心部に棒部材を押
し込んで、ボス部を他の部分より厚肉にすると共に、こ
のボス部の内周面を成形することを特徴とする回転体の
ボス部の製造方法。In a rotating body having a boss portion at the center of a main body made of a thin steel plate, the center portion of the steel plate is formed into a cap shape, and then the cap-shaped portion is formed on the opposite side of the cap-shaped portion. A rotation characterized by pushing a rod member into a hole having a diameter smaller than that of the central part, making the boss part thicker than other parts, and shaping the inner circumferential surface of the boss part. Method for manufacturing the boss part of the body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1336696A JP2769732B2 (en) | 1989-12-27 | 1989-12-27 | Method of manufacturing boss of rotating body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1336696A JP2769732B2 (en) | 1989-12-27 | 1989-12-27 | Method of manufacturing boss of rotating body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03198941A true JPH03198941A (en) | 1991-08-30 |
| JP2769732B2 JP2769732B2 (en) | 1998-06-25 |
Family
ID=18301860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1336696A Expired - Fee Related JP2769732B2 (en) | 1989-12-27 | 1989-12-27 | Method of manufacturing boss of rotating body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2769732B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003064073A1 (en) * | 2002-01-31 | 2003-08-07 | Kanemitsu Corporation | Method of forming spline and keyway for sheet metal rotating member with boss part |
| JP2010120057A (en) * | 2008-11-20 | 2010-06-03 | Nissan Motor Co Ltd | Press formed article, method for producing press formed article and production device therefor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55149408A (en) * | 1979-05-09 | 1980-11-20 | Mitsui Mining & Smelting Co | Bush with flange using lock device for automobile and manufacture of said bush |
-
1989
- 1989-12-27 JP JP1336696A patent/JP2769732B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55149408A (en) * | 1979-05-09 | 1980-11-20 | Mitsui Mining & Smelting Co | Bush with flange using lock device for automobile and manufacture of said bush |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003064073A1 (en) * | 2002-01-31 | 2003-08-07 | Kanemitsu Corporation | Method of forming spline and keyway for sheet metal rotating member with boss part |
| JP2003225728A (en) * | 2002-01-31 | 2003-08-12 | Kanemitsu:Kk | Method for forming spline and key groove of sheet metal rotary member having boss part |
| JP2010120057A (en) * | 2008-11-20 | 2010-06-03 | Nissan Motor Co Ltd | Press formed article, method for producing press formed article and production device therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2769732B2 (en) | 1998-06-25 |
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