JPH0562011B2 - - Google Patents
Info
- Publication number
- JPH0562011B2 JPH0562011B2 JP3960488A JP3960488A JPH0562011B2 JP H0562011 B2 JPH0562011 B2 JP H0562011B2 JP 3960488 A JP3960488 A JP 3960488A JP 3960488 A JP3960488 A JP 3960488A JP H0562011 B2 JPH0562011 B2 JP H0562011B2
- Authority
- JP
- Japan
- Prior art keywords
- cup
- tooth profile
- internal tooth
- punch
- shaped material
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 50
- 238000000034 method Methods 0.000 claims description 25
- 238000005242 forging Methods 0.000 claims description 19
- 238000010273 cold forging Methods 0.000 claims description 10
- 238000000137 annealing Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000007730 finishing process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Forging (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ビスカスカツプリングのケースのよ
うに、120〜150mm程度の外径をもち内周面に軸方
向のセレーシヨン状の多数の歯形をもつカツプ状
部材を成形する方法に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention has an outer diameter of about 120 to 150 mm, and has a large number of teeth in the form of serrations in the axial direction on the inner peripheral surface, like the case of a viscous cut spring. The present invention relates to a method of forming a cup-shaped member.
（従来の技術）
本願発明者等は、さきにカツプ状素材にインタ
ナル歯形を成形する方法として、特開昭61−
269951、同61−269952に示される方法を提案し
た。これら方法は、前工程で作られたカツプ状の
素材の底部を、外パンチと歯形を外周面に設けた
内パンチとで挾持しながら、その開口部からダイ
内に押込むことによりインタナル歯形を成形する
ものであり、この成形は、冷間で行なわれてい
た。(Prior Art) The inventors of the present application first proposed a method for forming an internal tooth profile on a cup-shaped material in Japanese Patent Application Laid-Open No.
269951 and 61-269952. In these methods, the bottom of the cup-shaped material made in the previous process is held between an outer punch and an inner punch with a tooth profile on the outer circumferential surface, and the internal tooth profile is formed by pushing it into the die through the opening. This molding was performed cold.
また、この成形に用いるカツプ状素材は、第６
図に示すように前工程において熱間鍛造により製
造しており、同図において丸棒を切断した原素材
１は1100〜1150℃の熱間鍛造温度に加熱され、据
込みにより大径素材２に鍛造され、熱間押出し成
形により凹穴４、穴底コーナの環状逃げ溝５をも
ち、かつ抜き勾配を備えたカツプを作り、軸穴７
を打抜いてカツプ状素材６とし、これを焼鈍し、
内外径を円筒面に機械加工をし、潤滑剤を塗布し
て前記特開昭61−269952の工程を冷間加工で行な
つていた。 In addition, the cup-shaped material used for this molding is
As shown in the figure, it is manufactured by hot forging in the previous process, and in the same figure, the raw material 1 cut from a round bar is heated to a hot forging temperature of 1100 to 1150°C, and then turned into a large diameter material 2 by upsetting. The cup is forged and hot-extruded to have a concave hole 4, an annular clearance groove 5 at the bottom corner of the hole, and a draft angle.
is punched out to form a cup-shaped material 6, which is annealed,
The inner and outer diameters were machined into cylindrical surfaces, a lubricant was applied, and the process described in JP-A-61-269952 was performed by cold working.
（発明が解決しようとする課題）
カツプ状素材６を第６図のように熱間成形する
と、環状逃げ溝５を形成するためのパンチの先端
に設けた環状突起の摩耗が激しいためパンチ寿命
が短かい。また大径素材２がパンチやダイにくい
付くのを防止する必要があるため内外面にテーパ
を設けることを要し、高温加熱によりスケールも
発生するから、テーパ面及び粗面を削る削り代を
見込む必要もある。したがつて、熱間鍛造後内外
面を切削加工し、然るのちに冷間鍛造によつてイ
ンタナル歯形を成形しなければならない。(Problem to be Solved by the Invention) When the cup-shaped material 6 is hot-formed as shown in FIG. 6, the annular protrusion provided at the tip of the punch for forming the annular relief groove 5 is severely worn, resulting in a shortened punch life. It's short. In addition, it is necessary to prevent the large-diameter material 2 from sticking to the punch or die, so it is necessary to provide tapers on the inner and outer surfaces, and since scale is generated due to high temperature heating, allowance for cutting the tapered and rough surfaces is expected. There is also a need. Therefore, after hot forging, the inner and outer surfaces must be cut, and then the internal tooth profile must be formed by cold forging.
このため、切削加工に時間を要して非能率であ
り、テーパ面及び粗面を削り落すため削り代も大
きくとらなければならない。 For this reason, the cutting process takes time and is inefficient, and a large cutting allowance must be taken in order to remove the tapered surface and rough surface.
このような不具合を避けるために冷間鍛造によ
りカツプ状素材を作ろうとすると、第７図のよう
に冷間据え込みをした大径素材８を焼鈍し、カツ
プ９に成形して穿孔しカツプ状素材１０を作り、
再び焼鈍してインタナル歯形を冷間鍛造すること
になり、切削加工を行なう必要はなくなるが、２
回の焼鈍を行なう必要があると共に、直径150mm
程度の製品を成形するときは、1500〜2000トンの
プレス機を用いなければならず、生産性、コスト
面の向上は望めない。 If you try to make a cup-shaped material by cold forging to avoid such problems, as shown in Fig. 7, a large-diameter material 8 that has been cold-upset is annealed, formed into a cup 9, and perforated to form a cup-shaped material. Make material 10,
The internal tooth profile will be annealed again and cold forged, eliminating the need for cutting.
It is necessary to perform annealing times and the diameter is 150mm.
When molding products of this size, a press machine of 1,500 to 2,000 tons must be used, and no improvement in productivity or cost can be expected.
したがつて、本発明は、前記の不具合がなく能
率的に大径の底付きインタナル歯形部材を製造す
ることを目的とするものである。 Therefore, an object of the present invention is to efficiently manufacture a large-diameter bottomed internal tooth profile member without the above-mentioned problems.
（課題を解決するための手段）
本発明は、カツプ状素材の成形に温間鍛造を用
いることにより工程を簡易化したもので、その第
１の手段は、先端面外周部に環状突起をもつパン
チとダイとにより、穴底コーナに環状逃げ溝をも
つカツプ状素材を温間鍛造により成形する工程
と、成形時の残熱を利用して焼鈍を行なう工程
と、冷間鍛造により該カツプ状素材にインタナル
歯形を成形する工程と、からなることを特徴とす
るものであり、第２の手段は、これに加えて、温
間鍛造時にカツプ状素材の内周を円筒状に成形
し、冷間鍛造時に素材開口部側から外周を絞り成
形して素材内周にインタナル歯形を成形するよう
にしたことを特徴とするものであり、第３の手段
は、第１の手段のに加えて、温間鍛造時にカツプ
状素材の内周に荒歯を形成し、冷間鍛造時に素材
の内周を内パンチの歯形で常時拘束しつつ外パン
チで素材の開口部側を押圧し、カツプ底側より外
周を絞り成形して内周にインタナル歯形を仕上げ
成形するようにしたことを特徴とするものであ
る。(Means for Solving the Problems) The present invention simplifies the process by using warm forging to form a cup-shaped material. A process of forming a cup-shaped material with an annular relief groove at the bottom corner of the hole by warm forging using a punch and a die, a process of annealing using the residual heat from forming, and a process of forming the cup-shaped material by cold forging. The second method is characterized by forming an internal tooth profile into the material.In addition to this, the second means also involves forming the inner periphery of the cup-shaped material into a cylindrical shape during warm forging, and then cold-forming the material into a cylindrical shape. The third means is characterized in that an internal tooth profile is formed on the inner periphery of the material by drawing the outer periphery from the opening side of the material during forging, and the third means includes, in addition to the first means, During warm forging, rough teeth are formed on the inner periphery of the cup-shaped material, and during cold forging, the inner periphery of the material is constantly restrained by the tooth profile of the inner punch, while the outer punch presses the opening side of the material, and the bottom side of the cup is pressed. This is characterized in that the outer periphery is drawn and the internal tooth profile is finished formed on the inner periphery.
（作用）
原素材を700〜850℃に加熱し、鍛圧して大径素
材、カツプ状素材の順に成形し、鍛造時の発熱を
含む残熱を利用して焼鈍させて歯形の冷間鍛造に
移る。カツプ状素材は、冷間鍛造時に、第２の手
段においては底部全面に加圧され、第３の手段に
おいては筒状部を加圧されるので、内底部を加圧
されないため底抜けのおそれなく強い成形圧力を
かけることができる。(Function) The raw material is heated to 700 to 850℃, pressed and formed into a large diameter material and then a cup-shaped material, and then annealed using the residual heat generated during forging to cold forge the tooth shape. Move. When the cup-shaped material is cold-forged, the entire bottom part is pressurized in the second means, and the cylindrical part is pressurized in the third means, so the inner bottom part is not pressurized, so there is no fear of bottoming out. Strong molding pressure can be applied.
（実施例）
以下本発明の実施例を説明する。第１図におい
て丸棒を切断してなる原素材１は700〜850℃に加
熱されて温間鍛造により直径を２〜３倍にされ大
素材１１が形成される。引続いてこれを先端に環
状突起をもつパンチでダイに圧入してカツプ１２
を成形し凹穴１３と環状逃げ溝１４を形成する。
該環状逃げ溝１４は内底部まで充分な長さの歯形
を形成するために必要である。(Example) Examples of the present invention will be described below. In FIG. 1, a raw material 1 made by cutting a round bar is heated to 700 to 850 DEG C. and warm-forged to double or triple its diameter to form a large material 11. Subsequently, this is press-fitted into the die using a punch with an annular protrusion at the tip to form a cup 12.
A recessed hole 13 and an annular relief groove 14 are formed by molding.
The annular relief groove 14 is necessary to form a tooth profile of sufficient length to the inner bottom.
凹穴１３の周面は、円筒面に成形されてもよい
し荒歯が形成されてもよく、荒歯が形成された方
が後工程の歯形冷間鍛造か容易となる。 The circumferential surface of the recessed hole 13 may be formed into a cylindrical surface or may have rough teeth formed thereon, and the tooth shape cold forging in the subsequent process becomes easier when rough teeth are formed.
このカツプ１２の底部に軸穴１６をあけてカツ
プ状素材１５とし、残熱を利用して焼鈍する。原
素材１は前記のように700〜850℃に加熱され、加
工中一旦は若干冷却するが、成形加工により発熱
するため昇温し、成形終了後は700〜750℃の残熱
を保有する。カツプ状素材１５を炉中に入れ、
0.5〜１時間この温度を維持させて毎度20〜50℃
の割合で炉中冷却し、650℃に達すると自然冷却
させ、これにより前工程を終る。 A shaft hole 16 is made in the bottom of this cup 12 to form a cup-shaped material 15, and the material is annealed using residual heat. The raw material 1 is heated to 700 to 850°C as described above, and although it is slightly cooled during processing, the temperature rises due to heat generation during the forming process, and after the completion of forming, it retains residual heat of 700 to 750°C. Put the cup-shaped material 15 into the furnace,
Maintain this temperature for 0.5 to 1 hour at 20 to 50℃ each time.
The product is cooled in the furnace at a rate of 200°C, and when it reaches 650°C, it is allowed to cool naturally, thereby completing the pre-process.
次にこのカツプ状素材１５にインタナル歯形を
冷間鍛造により成形する後工程に入る。第２図に
おいて２０はダイでアリフイス２１を備え、２２
は外パンチ、２３は内パンチで、内パンチ２３
は、端面外周に軸方向の環状突起３４が突設さ
れ、外周面には軸方向に多数のインボリユート歯
形２５が刻設されており、縦孔２６内にはノツク
アウトピン２７が挿入されている。内パンチ２３
の下面には受圧板２８が連設されてウレタンばね
２９で加圧され、フローテイング支持されてい
る。 Next, a post process is started in which an internal tooth profile is formed on this cup-shaped material 15 by cold forging. In FIG. 2, 20 is a die equipped with an aperture 21 and 22.
is an outside punch, 23 is an inside punch, and 23 is an inside punch.
An annular protrusion 34 in the axial direction is provided on the outer periphery of the end surface, a large number of involute teeth 25 are carved in the axial direction on the outer periphery, and a knockout pin 27 is inserted into the vertical hole 26. . Inner punch 23
A pressure receiving plate 28 is connected to the lower surface of the holder and is pressurized by a urethane spring 29 so as to be floatingly supported.
第３図ａに示すようにカツプ状素材１５を内パ
ンチ２３上にかぶせ、外パンチ２２を圧下する
と、素材１５は、両パンチ２２，２３に挾持され
た状態で下動し、開口側からオリフイス２１で絞
られて内パンチ２３の歯形２５押込まれて内周面
にインタナル歯形１６が成形されると共に所要の
長さに延伸して製品W1すなわち大径底付きイタ
ナル歯形部材となる。この歯形１６がそのままビ
スカスカツプリングのデイスク係合面となる。 As shown in FIG. 3a, when the cup-shaped material 15 is placed over the inner punch 23 and the outer punch 22 is pressed down, the material 15 moves downward while being held by both punches 22 and 23, and passes through the orifice from the opening side. 21 and pushed into the tooth profile 25 of the inner punch 23 to form an internal tooth profile 16 on the inner circumferential surface, and at the same time, it is stretched to a required length to become a product W1 , that is, a large diameter internal tooth profile member with a bottom. This tooth profile 16 directly becomes the disk engagement surface of the viscous cut spring.
次に温間加工時にカツプ状素材内面に荒歯を成
形し、冷間加工時に歯形を仕上げ成形する加工方
法を説明する。第４図において、原素材１は、前
記実施例と同様に温間加工により大径素材１１と
され、引続いて同図ｃに示すように、カツプ３０
が成形される。該カツプは底部３１、筒状部３
２、穴底コーナの環状逃げ溝３３、荒歯３４を備
え、ｄに示すように底部３１のボス部３１ａに軸
穴３５が穿孔されてカツプ状素材３６となる。そ
して、第５図の方法によつて第４図ｅの製品W2
が仕上げ成形される。製品W2は、延伸された筒
状部３２ａの内面にインタナル歯形３４ａ、環状
逃げ溝３３ａが仕上げ成形され、先端に厚肉部３
７、円筒面３７ａを備える。 Next, a processing method will be described in which rough teeth are formed on the inner surface of the cup-shaped material during warm working, and the tooth profile is finished formed during cold working. In FIG. 4, the raw material 1 is warm-processed into a large-diameter material 11 as in the previous embodiment, and then, as shown in FIG. 4c, a cup 30 is formed.
is formed. The cup has a bottom part 31 and a cylindrical part 3.
2. An annular relief groove 33 and rough teeth 34 are provided at the bottom corner of the hole, and a shaft hole 35 is bored in the boss portion 31a of the bottom portion 31 to form a cup-shaped material 36, as shown in d. Then, by the method shown in Fig. 5, the product W 2 of Fig. 4 e is obtained.
is finished and formed. Product W 2 has an internal tooth profile 34a and an annular relief groove 33a finished on the inner surface of the elongated cylindrical part 32a, and a thick wall part 3 at the tip.
7. It has a cylindrical surface 37a.
第５図ａ，ｂ，ｃにおいて、４０はオリフイス
４１をもつダイ、４２は加圧板で、該加圧板４２
の下面に筒状のパンチ４３が取付具４４で固着さ
れている。パンチ４３の内面には案内穴４５、拡
径部４６が設けられると共にニードルベアリング
４７が内装されている。 In FIGS. 5a, b, and c, 40 is a die having an orifice 41, 42 is a pressure plate, and the pressure plate 42
A cylindrical punch 43 is fixed to the lower surface of the housing with a fixture 44. The inner surface of the punch 43 is provided with a guide hole 45 and an enlarged diameter portion 46, and a needle bearing 47 is installed inside.
この案内穴４５内にマンドレル４８が挿入さ
れ、ニードルベアリング４７により回転自在かつ
軸方向摺動可能に支持され、その頭部４９がばね
５０で下向き加圧されている。マンドレル先端に
は環状突起５１が突設され、外周には軸方向に多
数のインボリユート形の歯形５２が設けられてい
る。そしてこの歯形５２の先端の案内部５３は第
５図ｄ，ｅに示すように角ａの先細のテーパ面と
されると共に、各歯形５２の中心線を稜線５３ａ
として両面を先細に面取りして斜面５３ｂ，５３
ｂが形成され、素材３６の荒歯３４の谷に進入し
易くされている。 A mandrel 48 is inserted into the guide hole 45 and supported by a needle bearing 47 so as to be rotatable and slidable in the axial direction, and its head 49 is pressed downward by a spring 50. An annular projection 51 is provided protruding from the tip of the mandrel, and a large number of involute-shaped teeth 52 are provided on the outer periphery in the axial direction. The guide portion 53 at the tip of each tooth profile 52 has a tapered surface with a corner a as shown in FIGS.
Both sides are tapered and chamfered as slopes 53b, 53.
b is formed to facilitate entry into the valleys of the rough teeth 34 of the material 36.
第５図ａのとおりカツプ状素材３６をダイ４０
に装入し、上型を下降させると、マドレル４８
は、素材３６の内穴内に進入し、荒歯３４と歯形
５２の歯筋が一致しないときは、歯形先端５３の
斜面５３ｂの案内作用により第５図ｂの矢印Ａの
ように微小回転して自動的に位置決めして進入を
続け、環状突起５１が逃げ溝３３着座して停止
と、引続く下降によりパンチ４３が、筒状部３２
の端縁を押すと共にばね５０を介してマンドレル
４８を加圧する。パンチ４３の加圧によつて素材
３６はノズル４１から底部３１側から押出され、
筒状部３２は後方に押出されて延伸すると共に内
向きに絞られて、長さl1のインタナル歯形３４ａ
と環状逃げ溝３３ａを仕上げ成形する。このとき
素材３６は、ダイ４０の大径部内で強大な圧力を
受けるから、歯形２５の上端より後部において
は、荒歯３４はマンドレル４８の平滑面に圧接さ
れて平滑な円筒状３７ａになると共に該大径部内
に充満した状態になり、長さl2を残して加圧を止
めると、製品W2の開口部に長さl2の厚肉部３７
が形成される。ここで加圧板４２を上昇させ適宜
のノツクアウトで製品W2を押上げてダイ４０か
ら取出す。 As shown in FIG.
When the upper mold is lowered, the madrel 48
enters the inner hole of the material 36, and when the tooth traces of the rough tooth 34 and the tooth profile 52 do not match, the tooth is slightly rotated as shown by arrow A in Fig. 5b due to the guiding action of the slope 53b of the tooth profile tip 53. The annular protrusion 51 is automatically positioned and continues to advance, and the annular protrusion 51 seats on the relief groove 33 and stops, and the punch 43 continues to descend, causing the punch 43 to move into the cylindrical part 32.
and pressurizes the mandrel 48 via the spring 50. By pressurizing the punch 43, the material 36 is extruded from the nozzle 41 from the bottom 31 side,
The cylindrical portion 32 is extruded rearward, stretched, and narrowed inward to form an internal tooth profile 34a having a length l1 .
Then, the annular relief groove 33a is finished formed. At this time, the material 36 is subjected to enormous pressure within the large diameter portion of the die 40, so that at the rear of the upper end of the tooth profile 25, the rough teeth 34 are pressed against the smooth surface of the mandrel 48, forming a smooth cylindrical shape 37a. When the large diameter part is filled with water and the pressurization is stopped leaving a length l2 , a thick wall part 37 with a length l2 is formed at the opening of the product W2.
is formed. Here, the pressure plate 42 is raised and the product W 2 is pushed up and taken out from the die 40 by an appropriate knock-out.
この製品W2をビスカスカツプリングのケース
として使用するとき、厚肉部３７は、製品W2の
変形し易い自由端部である開口部を補強すると共
に、該開口部を閉鎖する蓋体の固定具の取付部と
しての強度を保持し、また円筒部３７ａは、その
まま又は僅かの切削加工をするだけで蓋体嵌合部
となる。また、歯形３４ａはそのまま粘性抵抗発
生用デイスクの外周部の係合部となる。 When this product W 2 is used as a case for a viscous cut spring, the thick part 37 reinforces the opening, which is the free end of the product W 2 , which is easily deformed, and also fixes the lid that closes the opening. The cylindrical portion 37a maintains its strength as a mounting portion for a tool, and becomes a lid fitting portion as it is or with only a slight cutting process. Further, the tooth profile 34a directly serves as an engaging portion of the outer peripheral portion of the viscous resistance generating disk.
この実施例において、マンドレル４８をニード
ルベアリングを用いることなく案内穴４５に回
転、上下摺動自在に支持させることもできる。 In this embodiment, the mandrel 48 can be rotatably and vertically slidably supported in the guide hole 45 without using a needle bearing.
（発明の効果）
本発明は、以上のようにカツプ形素材を温間鍛
造により成形するから、原素材から比較的低荷重
で鍛造することができ、熱間鍛造のようにスケー
ルが出ず、また抜き勾配を設けて鍛造してこれを
切削加工してから仕上げ成形をするという工程を
踏む必要もなく、そのまま仕上げ成形に移すこと
ができるカツプ形素材が得られ、生産性が極めて
向上する。(Effects of the Invention) The present invention forms the cup-shaped material by warm forging as described above, so it can be forged from the raw material with a relatively low load, and unlike hot forging, scale does not appear. In addition, there is no need to go through the steps of forging with a draft, cutting it, and then final forming, and it is possible to obtain a cup-shaped material that can be directly transferred to final forming, which greatly improves productivity.
そして、700〜850℃程度の原素材を用いると鍛
造時の発熱で打上り温度も同時度に維持され、次
工程の焼鈍温度とも略一致するから、加熱又は放
冷のための調節用時間及び設備を必要とせず、残
熱が利用でき同温度に維持される焼鈍炉に入れれ
ばすむため、取扱いが容易で加工時間が短く省エ
ネルギー効果においてもすぐれ、カーボンの球状
化が促進される。 If a raw material with a temperature of about 700 to 850°C is used, the firing temperature will be maintained at the same time due to the heat generated during forging, and the annealing temperature in the next process will also be approximately the same, so the adjustment time for heating or cooling can be adjusted. It does not require any equipment and only needs to be placed in an annealing furnace that can utilize the residual heat and maintain the same temperature, so it is easy to handle, short processing time, has an excellent energy saving effect, and promotes spheroidization of carbon.
また、環状逃げ部により穴底コーナ部を越えて
歯形の有効長をのばし、内穴内を有効に利用する
ようにできるが、前工程で熱間鍛造を行なうと、
該環状逃げ溝を成形するための突起部品の損耗が
激しく型寿命が短いが、温間鍛造を行なうことに
より、型寿命を著しくのばすことができる。 In addition, the effective length of the tooth profile can be extended beyond the bottom corner of the hole by the annular relief part, and the inside of the inner hole can be used effectively, but if hot forging is performed in the previous process,
Although the protruding parts for forming the annular clearance groove are subject to severe wear and tear and the life of the mold is short, the life of the mold can be significantly extended by performing warm forging.
このように、本発明は生産性、省エネルギ性、
金型耐久性等すべての面ですぐれた効果を奏する
ことができる。 In this way, the present invention improves productivity, energy saving,
Excellent effects can be achieved in all aspects including mold durability.
第１図は本発明の工程説明図、第２図は一実施
例の仕上工程用金型の縦断面図、第３図ａ，ｂ，
ｃはその作用説明図、第４図ａ〜ｅは別の実施例
の工程説明図、第５図ａ，ｂ，ｃはその仕上工程
用金型の作用説明図、ｄ，ｅは一部拡大図、第６
図は従来の熱間鍛造による前工程の工程説明図、
第７図は冷間鍛造による前工程の工程説明図であ
る。
１４，１４ａ，３３，３３ａ……環状逃げ溝、
１５，３２……カツプ状素材、１６，３４ａ……
インタナル歯形。
Fig. 1 is a process explanatory diagram of the present invention, Fig. 2 is a vertical cross-sectional view of a mold for finishing process of one embodiment, Fig. 3 a, b,
c is an explanatory diagram of its operation, Figures 4 a to e are process explanatory diagrams of another embodiment, Figures 5 a, b, and c are explanatory diagrams of the operation of the mold for the finishing process, and d and e are partially enlarged views. Figure, 6th
The figure is an explanatory diagram of the previous process using conventional hot forging.
FIG. 7 is a process explanatory diagram of a pre-process by cold forging. 14, 14a, 33, 33a... annular clearance groove,
15, 32...Cup-shaped material, 16, 34a...
Internal tooth profile.
Claims (1)
とにより、穴底コーナに環状逃げ溝をもつカツプ
状素材を温間鍛造により成形する工程と、成形時
の残熱を利用して焼鈍を行なう工程と、冷間鍛造
により該カツプ状素材にインタナル歯形を成形す
る工程と、からなることを特徴とする大径底付き
インタナル歯形部材の製造方法。 ２ 温間鍛造時にカツプ状素材の内周を円筒状に
成形し、冷間鍛造時に素材開口部側から外周を絞
り成形して素材内周にインタナル歯形を成形する
ようにしたことを特徴とする請求項１記載の大径
底付きインタナル歯形部材の製造方法。 ３ 温間鍛造時にカツプ状素材の内周に荒歯を形
成し、冷間鍛造時に素材の内周を内パンチの歯形
で常時拘束しつつ外パンチで素材の開口部側を押
圧し、カツプ底側より外周を絞り成形して内周に
インタナル歯形を仕上げ成形するようにしたこと
を特徴とする請求項１記載の大径底付きインタナ
ル歯形部材の製造方法。[Scope of Claims] 1. A process of forming a cup-shaped material having an annular relief groove at the bottom corner of the hole by warm forging using a punch and a die having an annular protrusion on the outer periphery of the tip surface, and removing residual heat during forming. 1. A method of manufacturing a large-diameter bottomed internal tooth profile member, comprising the steps of: annealing the cup-shaped material by cold forging. 2. The inner periphery of the cup-shaped material is formed into a cylindrical shape during warm forging, and the outer periphery is drawn from the opening side of the material during cold forging to form an internal tooth profile on the inner periphery of the material. A method for manufacturing a large-diameter bottomed internal tooth profile member according to claim 1. 3. During warm forging, rough teeth are formed on the inner periphery of the cup-shaped material, and during cold forging, the inner periphery of the material is constantly restrained by the teeth of the inner punch, while the outer punch presses the opening side of the material, forming the cup bottom. 2. The method of manufacturing a large-diameter bottomed internal tooth profile member according to claim 1, wherein the outer circumference is drawn from the side and the internal tooth profile is finish formed on the inner circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3960488A JPH01215429A (en) | 1988-02-24 | 1988-02-24 | Manufacture of large diameter bottomed internal tooth profile member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3960488A JPH01215429A (en) | 1988-02-24 | 1988-02-24 | Manufacture of large diameter bottomed internal tooth profile member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01215429A JPH01215429A (en) | 1989-08-29 |
| JPH0562011B2 true JPH0562011B2 (en) | 1993-09-07 |
Family
ID=12557718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3960488A Granted JPH01215429A (en) | 1988-02-24 | 1988-02-24 | Manufacture of large diameter bottomed internal tooth profile member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01215429A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04135029A (en) * | 1990-09-03 | 1992-05-08 | Kyoritsu Seiki:Kk | Method for cold forming short tube with intermediate flange |
| JPH06344073A (en) * | 1993-06-11 | 1994-12-20 | Gooshiyuu:Kk | Formation of bottomed involute spline hole |
| US5967276A (en) * | 1997-05-30 | 1999-10-19 | Eaton Corporation | Viscous actuated ball ramp clutch and improved housing therefor |
| JP3222808B2 (en) * | 1997-07-31 | 2001-10-29 | ユニプレス株式会社 | Ironing method of spline tooth profile in stepped sheet metal press-formed product and sheet metal clutch drum ironed by the same method |
| JP4832736B2 (en) * | 2004-07-28 | 2011-12-07 | Ｎｔｎ株式会社 | Hydrodynamic bearing unit |
| JP5134360B2 (en) * | 2007-12-27 | 2013-01-30 | 大岡技研株式会社 | Integrated molded internal gear |
| JP2014184872A (en) * | 2013-03-25 | 2014-10-02 | Showa Corp | Fitting structure of arm member to output shaft of power steering device |
-
1988
- 1988-02-24 JP JP3960488A patent/JPH01215429A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01215429A (en) | 1989-08-29 |
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