JPH0245531B2 - KAITENTANZONYORUFURANJITSUKICHUKUHINNOSEIKEIHOHOOYOBIKAITENTANZOKINOWAGATAATSUSHI - Google Patents
KAITENTANZONYORUFURANJITSUKICHUKUHINNOSEIKEIHOHOOYOBIKAITENTANZOKINOWAGATAATSUSHIInfo
- Publication number
- JPH0245531B2 JPH0245531B2 JP18257682A JP18257682A JPH0245531B2 JP H0245531 B2 JPH0245531 B2 JP H0245531B2 JP 18257682 A JP18257682 A JP 18257682A JP 18257682 A JP18257682 A JP 18257682A JP H0245531 B2 JPH0245531 B2 JP H0245531B2
- Authority
- JP
- Japan
- Prior art keywords
- punch
- indenter
- upper mold
- mold
- shoulder surface
- 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 39
- 238000000034 method Methods 0.000 claims description 20
- 238000005242 forging Methods 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 description 9
- 239000007858 starting material Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 238000003754 machining Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 206010039509 Scab Diseases 0.000 description 1
- 241000270708 Testudinidae Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/02—Special design or construction
- B21J9/025—Special design or construction with rolling or wobbling dies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Description
【発明の詳細な説明】
本発明は回転鍛造により軸状素材から偏平なフ
ランジ付中空品を成形するのに際して、ポンチに
対し外周の上金型が受圧負荷に対応して相対的に
後退するような金型複動機能を上型圧子に付与す
ることにより、製品の加工において、軸状素材の
素材径を十分に大きな径まですえ込み、その後に
中空部のすえ込みを行わせ、もつて中空孔部のす
え込み径に限定されず出発素材として適当に小径
の軸状素材を用いて、一回の回転鍛造により欠陥
のない製品加工を無理なく行うことができる成形
法及び、そのような回転鍛造機の上型圧子に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention is designed so that when forming a flat flanged hollow product from a shaft-shaped material by rotary forging, an upper die on the outer periphery retreats relative to the punch in response to the pressure load. By giving the upper die indenter a double-acting function, the material diameter of the shaft-shaped material is swaged to a sufficiently large diameter during product processing, and then the hollow part is swaged. A forming method that can easily process a defect-free product by one rotational forging using a shaft-shaped material with an appropriately small diameter as a starting material regardless of the swaging diameter of the hole, and such rotation. Regarding the upper die indenter of a forging machine.
従来この種のフランジ付中空品は、例えば特公
昭52−44307号「回転鍛造によるフランジ付中空
品の成形法」（第１図）に示される如く、「パンチ
３及び肩押圧面４を有し、かつ傾斜しながらころ
がり回転する上型圧子２により、上下動する下型
１の型凹部５に位置された軸状の素材Ｗを加圧
し、上型圧子２のパンチ３で中空孔部のすえ込み
を進行させたのち、ノツクアウト６を後退させな
がら上型圧子２のパンチ３で中空孔の部分を打ち
抜き、これと同時に周囲をすえ込む。」ことによ
つて成形できることは知られている。 Conventionally, this type of flanged hollow product has a punch 3 and a shoulder pressing surface 4, as shown in, for example, Japanese Patent Publication No. 52-44307, “Forming method of flanged hollow product by rotary forging” (Fig. 1). The upper mold indenter 2, which rolls and rotates while tilting, presses the shaft-shaped material W positioned in the mold recess 5 of the lower mold 1 that moves up and down, and the punch 3 of the upper mold indenter 2 presses the shaft-shaped material W positioned in the mold recess 5 of the lower mold 1, which moves up and down. It is known that molding can be carried out by punching out the hollow hole portion with the punch 3 of the upper die indenter 2 while retracting the knockout 6 after the indentation has progressed, and at the same time swaging the periphery.
しかしこの方法によつて、上型圧子のパンチ径
より素材径が小さいものは勿論、第２図に示す如
くパンチ３径より素材Ｗ径が多少大きな軸状素材
Ｗを回転鍛造すると、該パンチ３による中空孔部
８のすえ込みの進行に伴つて欠陥が発生する欠点
がある。 However, when this method is used to rotationally forge not only a material whose diameter is smaller than the punch diameter of the upper die indenter but also a shaft-shaped material W whose diameter is somewhat larger than the diameter of the punch 3 as shown in FIG. There is a drawback in that defects occur as the hollow hole portion 8 is swamped.
すなわち、軸状素材Ｗはまずパンチ３によつて
のみすえ込まれるため、上型圧子２のパンチ３に
よる中空孔部のすえ込みの進行に伴つて、第２図
イ，ロ，ハ，ニ，ホ，ヘ，トで印したパンチ先端
縁対向位置の中空孔部周壁隅部付近に、座屈によ
る折れ込み（「かぶり」ともいう）が発生し、そ
れがフランジ成形の進行に伴つてイ乃至トの如く
移動し、フランジ部の表面付近に欠陥となつて残
つてしまう。 That is, since the shaft-shaped material W is first swaged by the punch 3, as the hollow hole portion of the upper die indenter 2 is swaged by the punch 3, the shapes of A, B, C, D, etc. in FIG. A fold (also called "fogging") due to buckling occurs near the corner of the circumferential wall of the hollow hole at a position opposite to the edge of the punch tip marked with E, H, and G, and as the flange forming progresses, It moves like a tortoise and remains as a defect near the surface of the flange.
この欠陥発生過程は、第２図イ乃至トに対応す
る第３図イ乃至トの折れ込み部顕微鏡写真（×50
倍）により示されている。 This defect generation process can be seen in the micrographs (×50
times).
従つてこの方法においては、素材径に対する中
空孔部のすえ込み径に限定があり、おのずと中空
孔部より相当に大きな軸状の素材を出発素材とし
て成形しなければならない。 Therefore, in this method, there is a limit to the swaging diameter of the hollow hole relative to the material diameter, and it is necessary to mold a shaft-shaped material considerably larger than the hollow hole as a starting material.
然しながら、径の大きな軸状素材の切断にはそ
れなりに大型設備及び多大な切断エネルギーを要
し、素材の剪断あるいは切断の費用が嵩む問題が
ある。また仮に素材径拡大のためにすえ込み工程
を別途実施すれば、その分だけ一段と製品コスト
が上昇する問題がある。 However, cutting a shaft-like material with a large diameter requires relatively large equipment and a large amount of cutting energy, and there is a problem that the cost of shearing or cutting the material increases. Furthermore, if a separate swaging step is performed to enlarge the diameter of the material, there is a problem that the product cost will further increase accordingly.
その点、中空孔部のすえ込み径に拘らず適当に
径の小さな軸状の素材を出発素材として、１回の
回転鍛造加工によりフランジ付中空品の成形を欠
陥なく行うことができれば、出発素材が低コスト
に提供でき、しいてはフランジ付中空品を安価に
製造することができる。 In this regard, if a flanged hollow product can be formed without defects by one rotational forging process using a shaft-like material with an appropriately small diameter as a starting material, regardless of the swaging diameter of the hollow hole, the starting material can be provided at low cost, and flanged hollow products can be manufactured at low cost.
そこで本発明は、上記要求に対してなさたもの
で、回転鍛造によるフランジ付中空品の成形にお
いて、中空孔部のすえ込み径に限定されず、出発
素材として適当に小径の軸状素材を用いて、１回
の回転鍛造で欠陥のない製品加工を無理なく行う
ことができるよう、中空孔部のすえ込み以前に素
材径を中空孔部の径に対し中空孔部のすえ込みの
進行に伴つて折れ込みが発生しないだけの十分に
大きな径まですえ込み、しかる後に上型圧子のパ
ンチを素材に対して前進せしめて中空孔部のすえ
込みを行わすことにより、従来の加工法のもつ欠
点を排除することを目的とするものである。 Therefore, the present invention has been made in response to the above-mentioned requirements.In forming a flanged hollow product by rotary forging, an appropriately small-diameter shaft material is used as a starting material, without being limited to the swaging diameter of the hollow hole. Before swaging the hollow hole, the diameter of the material is adjusted to the diameter of the hollow hole as the swaging of the hollow hole progresses, so that defect-free product processing can be easily performed in one rotational forging. By swaging the hollow hole to a diameter large enough to prevent folding and folding, and then moving the punch of the upper indenter forward against the material to swage the hollow hole, it is possible to eliminate the disadvantages of conventional processing methods. The purpose is to eliminate the
以下本発明を実施例の図面とともに説明する。
まず実施例の回転鍛造機（ロータフオームまたは
ロツキングダイプレスともいう）の構造を説明す
ると、第５図に示す如く回転鍛造機Ａは回転され
る上型圧子Ｕと、これに対応し、上下動する下型
Ｌとを有する。 The present invention will be described below with reference to drawings of embodiments.
First, to explain the structure of the rotary forging machine (also called rotor form or rocking die press) of the embodiment, as shown in FIG. It has a lower mold L that moves.
下型Ｌは、第６図にも示される如く、上面部に
所定のフランジ形状にすえ込むべき型彫空間３３
が形成され、かつ中心部軸線方向にパンチ抜き孔
が貫通形成された下金型３２と、該下金型３２の
孔内に嵌着され、ノツクアウト孔が貫通形成され
たインナースリーブ２９と、インナースリーブ２
９の孔内に昇降自在に挿入された小径棒部分とイ
ンナースリーブ２９の孔より外径の大きな大径棒
部分とが形成されたノツクアウトパンチＮと、前
記下金型３２をボルスタ５９に固定する固定用リ
ング２６、下型ホルダ２５および受圧板２３，２
４と、インナースリーブ２９の後退位置を規制す
るため下金型３２の孔下方に挿入された受圧リン
グ２７と、前記下金型３２を上下動する主ピスト
ン１８と、この主ピストンとは別に自由に上下動
が与えられ、前記ノツクアウトパンチ１１を上下
動するために高さ調整ピース２１を介して連結さ
れた副ピストン２０とから構成されており、前記
主ピストン１８の上昇位置は、磁気スケール（図
示せず）により任意に正確に設定可能となつてい
る。 As shown in FIG. 6, the lower mold L has a mold engraving space 33 in the upper surface to be swaged into a predetermined flange shape.
a lower mold 32 having a punched hole formed therein in the central axial direction; an inner sleeve 29 fitted into the hole of the lower mold 32 and having a knockout hole formed therethrough; sleeve 2
A knock-out punch N is formed with a small diameter rod part inserted into the hole 9 so as to be freely raised and lowered, and a large diameter rod part having a larger outer diameter than the hole of the inner sleeve 29, and the lower mold 32 is fixed to the bolster 59. The fixing ring 26, the lower mold holder 25, and the pressure receiving plates 23, 2
4, a pressure receiving ring 27 inserted below the hole of the lower mold 32 in order to restrict the retreating position of the inner sleeve 29, a main piston 18 that moves the lower mold 32 up and down, and a free cylinder separate from the main piston. and a sub-piston 20 connected via a height adjustment piece 21 to move the knock-out punch 11 up and down. (not shown) allows arbitrary and accurate setting.
この下型Ｌは、主シリンダ１７に挿入された主
ピストン１８により昇降駆動されるとともに、ボ
ルスタ５９の外周がキブライナー６０に案内され
て軸線方向に昇降するようになつている。 This lower die L is driven up and down by a main piston 18 inserted into a main cylinder 17, and the outer periphery of a bolster 59 is guided by a kib liner 60 to move up and down in the axial direction.
そして主ピストン１８の軸心位置には、小型の
副シリンダ１９がさらに設けられており、副シリ
ンダ１９にはノツクアウトパンチＮ及びインナー
スリーブ２９を昇降させる副ピストン２０が挿入
されている。 A small auxiliary cylinder 19 is further provided at the axial center position of the main piston 18, and a auxiliary piston 20 for raising and lowering the knockout punch N and the inner sleeve 29 is inserted into the auxiliary cylinder 19.
なお、インナースリーブ２９は、その大径段付
部が摺動空間３１内で運動できる範囲内におい
て、下金型３２の孔に沿つてノツクアウトパンチ
Ｎによつて上下動される。 The inner sleeve 29 is moved up and down by the knockout punch N along the hole of the lower mold 32 within the range in which its large diameter stepped portion can move within the sliding space 31.
前述した上型圧子Ｕは、第６図にも示されるよ
うに、その軸心に沿つて設けたパンチ４６と、先
端にフランジ部分をすえ込むための所定形状の押
圧肩面４３が形成され、パンチに対し軸線方向に
相対的に後退可能にかつパンチ先端側を同心的に
内周に保持した円筒状の上金型４１と、上金型４
１の反押圧肩面４４と適当な間隔を持つて対向し
てその間に発条収容空間４５を形成し、パンチ後
端側を同心的に内周に保持した円筒状の受圧板３
８と、所望の予圧縮状態で前記発条収容空間４５
内に装着され、前記上金型の押圧型面４３が受け
る成形負荷に対応して圧縮される複数の皿バネ３
９，４０と、さらにそれら上金型４１および皿バ
ネ３９，４０を所期の運動が達成できるよう外周
側から保持する押えリング４８および上型ホルダ
３７とから構成されており、パンチ４６の先端面
４７と上金型４１の押圧肩面４３とは通常の状態
において同一面となる。 As shown in FIG. 6, the above-mentioned upper mold indenter U has a punch 46 provided along its axis, and a pressing shoulder surface 43 of a predetermined shape for inserting the flange portion at the tip. A cylindrical upper mold 41 that can be retracted relative to the punch in the axial direction and that holds the punch tip side concentrically on the inner periphery, and the upper mold 4
A cylindrical pressure receiving plate 3 that faces the anti-pressing shoulder surface 44 of No. 1 at an appropriate distance, forms a spring accommodation space 45 therebetween, and holds the rear end of the punch concentrically on the inner periphery.
8, and the spring accommodation space 45 in a desired precompressed state.
a plurality of disc springs 3 that are compressed in response to the molding load that is applied to the pressing mold surface 43 of the upper mold;
9, 40, and a presser ring 48 and upper mold holder 37 that hold the upper mold 41 and disc springs 39, 40 from the outer periphery so that the desired movement can be achieved. The surface 47 and the pressing shoulder surface 43 of the upper mold 41 are on the same surface in a normal state.
この上型圧子Ｕは、半球状凹部受面を有する球
座１６に半球状凸部摺動面が支持された主軸１５
先端の下型Ｌ対向位置に装着されている。 This upper die indenter U has a main shaft 15 in which a hemispherical convex sliding surface is supported by a spherical seat 16 having a hemispherical concave receiving surface.
It is installed at the tip opposite the lower die L.
そして上型圧子Ｕは、主軸１５の上方を支持す
る特別な軸受ユニツト１４により、中心軸線に対
し所望の角度θを有して傾斜しながら回転（ころ
がり回転）するようにされている。 The upper mold indenter U is rotated (rollingly rotated) while being inclined at a desired angle θ with respect to the central axis by a special bearing unit 14 that supports the upper part of the main shaft 15.
このように上型圧子Ｕを回転させる動力として
は、モータ１０の回転がモータ側のプーリ１１か
らベルト１２を介して主軸端のプーリ１３へ伝達
されるようになつている。 The power for rotating the upper mold indenter U in this manner is transmitted from the rotation of the motor 10 from the pulley 11 on the motor side to the pulley 13 at the end of the main shaft via the belt 12.
つぎに、上記回転鍛造機Ａによるフランジ付中
空品Ｗ５（第９図）の成形方法について述べる。
まず第６図左側に示すように、下金型３２の孔内
で下降状態にあるインナースリーブ２９のその上
端面３６に被加工物である軸状の素材Ｗを供給す
る。素材供給時の下型Ｌに対する素材Ｗの心出し
は、下金型３２の孔内周で位置出し案内させる
か、またはインナースリーブ上端面に若干の環状
段差を設けることなどによつて正確に行うことが
できる。 Next, a method of forming the flanged hollow product W5 (FIG. 9) using the rotary forging machine A will be described.
First, as shown on the left side of FIG. 6, a shaft-shaped material W, which is a workpiece, is supplied to the upper end surface 36 of the inner sleeve 29, which is in a downward state within the hole of the lower mold 32. The centering of the material W with respect to the lower mold L during material feeding is performed accurately by positioning and guiding the material on the inner periphery of the hole in the lower mold 32 or by providing a slight annular step on the upper end surface of the inner sleeve. be able to.
つぎに第６図右側に示すように、主ピストン１
８および副ピストン２０により、下型Ｌを上動さ
せて素材Ｗを下型ＬのノツクアウトパンチＮおよ
びインナースリーブ２９と、上型圧子Ｕのパンチ
４７および上金型４１にて支持する。 Next, as shown on the right side of Fig. 6, the main piston 1
8 and the sub-piston 20 move the lower die L upward, and the material W is supported by the knockout punch N and inner sleeve 29 of the lower die L, and the punch 47 of the upper die indenter U and the upper die 41.
このとき、下金型３２を上動させるために主ピ
ストン１８により矢印Ｍ方向の加工加圧力が加え
られ、またノツクアウトパンチＮが後退（下動）
しないように該ノツクアウトパンチＮには副ピス
トン２０により矢印Ｓ方向の加工加圧力が加えら
れる。 At this time, the main piston 18 applies processing pressure in the direction of arrow M to move the lower mold 32 upward, and the knock-out punch N retreats (moves downward).
A machining force in the direction of arrow S is applied to the knockout punch N by the sub piston 20 to prevent the knockout punch N from being damaged.
この素材Ｗの支持において、ノツクアウトパン
チＮおよびインナースリーブ２９は副ピストン２
０の上昇によりその上端面３５，３６が型彫底面
３４とほぼ同一平面となるように、予め主ピスト
ン１８と副ピストン２０との上昇速度のバランス
が適当に設定されている。 In supporting this material W, the knockout punch N and the inner sleeve 29 are
The balance between the rising speeds of the main piston 18 and the sub-piston 20 is set appropriately in advance so that the upper end surfaces 35 and 36 become substantially flush with the die-engraved bottom surface 34 as the piston 18 rises.
なお、装置をより複雑化すれば副ピストン２０
の上昇位置および圧力を主ピストン同様に自在に
設定可能にすることもできる。 Note that if the device is made more complicated, the secondary piston 20
It is also possible to freely set the rising position and pressure of the main piston in the same way as the main piston.
そして上述した主副ピストンによる加工加圧力
を継続付加すると、軸状の素材Ｗはその上面が上
方において角度θで傾斜しながら回転している上
型圧子Ｕのパンチ４６に強く押し付けられる。 When the above-described machining force from the main and sub-pistons is continuously applied, the shaft-shaped material W is strongly pressed against the punch 46 of the upper mold indenter U which is rotating while the upper surface thereof is tilted upward at an angle θ.
さらに第７図左側に示すように、下金型３２に
加わる矢印Ｍ方向の加工加圧力及びノツクアウト
パンチＮに加わる矢印Ｓ方向の加工加圧力を継続
負荷させて、下型Ｌ全体を前述よりさらに上動す
ると、軸状の素材Ｗは前述よりさらに押し上げら
れることになり、この押し上げによつて素材Ｗは
前述のように傾斜しながらころがり回転している
上型圧子Ｕの同一面となつているパンチ４６の先
端面４７と上金型４１の押圧肩面４３とにより、
順次部分的に押しつぶされるすえ込み加工がなさ
れる。 Furthermore, as shown on the left side of FIG. 7, the entire lower mold L is moved from above by continuously applying a working force in the direction of the arrow M to the lower mold 32 and a working force in the direction of the arrow S to the knockout punch N. When the shaft-shaped material W is moved further up, it is pushed up further than mentioned above, and as a result of this pushing up, the material W becomes flush with the upper die indenter U which is rolling and rotating while tilting as described above. Due to the tip surface 47 of the punch 46 and the pressing shoulder surface 43 of the upper die 41,
A swaging process is performed in which parts are crushed one after another.
この場合、ほぼ同一平面となつた下型Ｌの上端
面３４，３５，３６と段差なく同一面となつてい
る上型圧子Ｕの先端面４７，４３とにより、素材
Ｗ２は型彫空間３３内で容易に外周に向かつて押
し広げられる。 In this case, the material W2 is moved into the die-scabbing space 33 by the upper end surfaces 34, 35, 36 of the lower die L, which are almost on the same plane, and the tip surfaces 47, 43 of the upper die indenter U, which are on the same plane without any difference in level. It can be easily pushed toward the outer periphery.
さらに矢印Ｍ，Ｓ方向の加工加圧力が継続負荷
されると第７図右側に示すように、素材Ｗ３は径
の増大に伴い上金型４１の押圧肩面４３に接する
面積が漸増して行き、やがて押圧肩面４３の受け
る受圧負荷が予圧状態で装着された皿バネ３９，
４０の反発力を越えると、皿バネ３９，４０の圧
縮が起き、それに伴つて上金型４１はパンチ４６
に対し相対的に後退を開始する。 Furthermore, when the machining pressure in the directions of arrows M and S is continuously applied, the area of the material W3 in contact with the pressing shoulder surface 43 of the upper mold 41 gradually increases as the diameter increases, as shown on the right side of FIG. , the pressure load received by the pressing shoulder surface 43 is eventually applied to the disc spring 39 in a preloaded state,
When the repulsive force of 40 is exceeded, the disc springs 39 and 40 are compressed, and the upper mold 41 is moved by the punch 46.
begins to retreat relative to the
そして、第８図左側に示すように上記状態を少
し続行したならば、第８図右側に示すように副ピ
ストン２０を前述とは逆の矢印Ｓ１方向に作動さ
せ、ノツクアウトパンチＮを矢印Ｓ１方向に後退
（下動）させるとともに下金型３２を前述よりも
さらに矢印Ｍ方向に押し上げ（上動）ると、上型
圧子Ｕのパンチ４６による中空孔部５０の成形が
完了するとともに、該上型圧子Ｕの押圧肩面４３
によるフランジ部分のすえ込みが型彫空間３３の
形状にならされる。 After continuing the above state for a while as shown on the left side of FIG. 8, the sub piston 20 is operated in the direction of arrow S1 opposite to that described above, and the knockout punch N is moved as indicated by arrow S1, as shown on the right side of FIG. When the lower mold 32 is pushed back (moved upward) further in the direction of the arrow M than described above, the forming of the hollow hole 50 by the punch 46 of the upper mold indenter U is completed, and the molding of the hollow hole 50 is completed. Pressing shoulder surface 43 of upper die indenter U
The flange portion is swaged into the shape of the die-cutting space 33.
ここに上述した一連の手段にて軸状の素材Ｗか
らフランジ付中空品の成形品Ｗ５が完成される。
すなわち、第４図に示す如く、中空孔部５０のす
え込み以前に素材Ｗ径を中空孔部のすえ込みの進
行に伴つて折れ込みが発生しないだけの十分に大
きな径Ｗ１，Ｗ２まですえ込み、しかる後に上型
圧子Ｕの上金型４１が後退（上動）し相対的に上
型圧子Ｕのパンチ４６が素材Ｗ３，Ｗ４に対して
前進して中空孔部５０のすえ込みが行われ、成形
品Ｗ５が完成される。 Here, a flanged hollow molded product W5 is completed from the shaft-shaped raw material W by the above-described series of steps.
That is, as shown in FIG. 4, before swaging the hollow hole portion 50, the diameter of the material W is swaged to a diameter W1, W2 that is sufficiently large to prevent folding as the hollow hole portion progresses. Then, the upper mold 41 of the upper mold indenter U retreats (moves upward), and the punch 46 of the upper mold indenter U moves relatively forward relative to the materials W3 and W4 to swage the hollow hole portion 50. , the molded product W5 is completed.
しかるのちは、成形品Ｗ５および底肉５１を型
彫空間３３内から取り出すものであるが、本実施
例においては、第９図左側に示す如く主ピストン
１８にて下金型３２を矢印Ｍ１方向へ後退（下
動）させ、続いて第９図右側に示す如く、副ピス
トン２０にてノツクアウトパンチＮを矢印Ｓ方向
へ上動させれば、成形品Ｗ５および底肉５１が型
から取り出される。 Thereafter, the molded product W5 and the bottom wall 51 are taken out from the mold-engraving space 33, but in this embodiment, the lower mold 32 is moved in the direction of the arrow M1 using the main piston 18, as shown on the left side of FIG. The molded product W5 and the bottom wall 51 are removed from the mold by moving the knockout punch N upward in the direction of the arrow S using the sub piston 20, as shown on the right side of FIG. .
なお、成形品Ｗ５から底肉５１を完全に打ち抜
いた状態でノツクアウトすることにより底肉５１
が中空孔部５０に食い付く場合は、第９図に示す
如く成形品Ｗ５に底肉５１が連結された状態で上
述の成形が完了するようにし、その後に底肉５１
が連結された状態のままノツクアウトして、成形
品Ｗ５取り出し後に底肉５１を切断するようにし
ても良い。 In addition, by knocking out the bottom wall 51 after completely punching it out from the molded product W5, the bottom wall 51
If it bites into the hollow hole portion 50, the above-mentioned molding is completed with the bottom wall 51 connected to the molded product W5 as shown in FIG. 9, and then the bottom wall 51
It is also possible to knock out the molded product W5 in a connected state and cut the bottom wall 51 after taking out the molded product W5.
以上のように本発明は、中空孔部のすえ込み以
前に素材径を中空孔部のすえ込みの進行に伴つて
座屈による折れ込みが発生しないだけの十分に大
きな径まですえ込み、しかる後に上型圧子の上金
型が後退（上動）し相対的に上型圧子のパンチが
素材に対して前進して中空孔部のすえ込みを行う
ようにしたので、回転鍛造によるフランジ付中空
品の成形において、中空孔部のすえ込み径に限定
されず、出発素材として適当に小径の軸状素材を
用いて一回の回転鍛造で欠陥のない製品加工を無
理なく行うことができる。またこのような上型圧
子を使用することにより、平歯車、傘歯車および
ゼロールベベル等通常鍛造成形可能なものであれ
ば、同様の効果が得られる。 As described above, in the present invention, the diameter of the material is swaged to a diameter large enough to prevent bending due to buckling as the swaging of the hollow hole progresses, and then The upper die of the upper indenter moves back (moves upward) and the punch of the upper indenter moves forward relative to the material to swage the hollow hole, making it possible to produce hollow products with flanges by rotary forging. In the forming process, it is not limited to the swaging diameter of the hollow hole part, and by using an appropriately small diameter shaft material as the starting material, it is possible to easily process a product without defects by one rotational forging. Further, by using such an upper mold indenter, the same effect can be obtained with any material that can be normally forged, such as spur gears, bevel gears, and zero bevels.
第１図は従来の成形方法を表わす説明図的断面
平面図。第２図は第１図の成形方法に基づく成形
過程の説明図。第３図は第２図の各成形過程にお
ける座屈による折れ込み発生過程を表わす折れ込
み部の金属組織写真による拡大断面図。第４図は
本発明の成形方法の実施例を表わすもので成形過
程の説明図。第５図は本発明の上型圧子の実施例
を表わすもので回転鍛造機の一部断面平面図。第
６図乃至第９図は第５図の回転鍛造機による成形
過程を各図を中心線の左右に分けて段階的に合成
した説明図的断面平面図である。
（記号の説明）、Ａ……回転鍛造機。Ｎ……ノ
ツクアウトパンチ。Ｕ……上型圧子。Ｌ……下
型。Ｗ（Ｗ１，Ｗ２，Ｗ３，Ｗ４）……軸状の素
材。Ｗ５……フランジ付中空品。３３……型彫空
間。３９，４０……発条。４１……上金型。４３
……押圧肩面。４６……パンチ。４７……パンチ
先端面。５０……中空孔部。
FIG. 1 is an explanatory cross-sectional plan view showing a conventional molding method. FIG. 2 is an explanatory diagram of the molding process based on the molding method shown in FIG. FIG. 3 is an enlarged cross-sectional view of the metallographic structure of the folded portion showing the process of folding due to buckling in each forming process shown in FIG. FIG. 4 shows an embodiment of the molding method of the present invention and is an explanatory diagram of the molding process. FIG. 5 is a partially sectional plan view of a rotary forging machine showing an embodiment of the upper die indenter of the present invention. 6 to 9 are explanatory cross-sectional plan views in which the forming process by the rotary forging machine shown in FIG. 5 is synthesized step by step by dividing each figure into left and right sides of the center line. (Explanation of symbols), A...Rotary forging machine. N...Knock out punch. U...Upper type indenter. L...Lower mold. W (W1, W2, W3, W4)...Shaft-shaped material. W5...Hollow product with flange. 33...Mold engraving space. 39,40...Hatsujo. 41... Upper mold. 43
...pressure shoulder surface. 46...Punch. 47...Punch tip surface. 50...Hollow hole part.
Claims (1)
で所望の長さを有した軸状の素材Ｗを、パンチ４
６及びそのパンチ４６外周にそのパンチの先端面
４７と同一面に押圧肩面４３を備えかつ反押圧肩
面４４に発条３９，４０が装着されてパンチ４６
に対し受圧負荷に対応して相対的に後退可能にさ
れた円筒状の上金型４１を有し傾斜しながらころ
がり回転する上型圧子Ｕにより加圧して、前記素
材Ｗを前記パンチ４６の径に対し十分に大きな径
まですえ込んだ後に、前記下型Ｌの下金型３２内
に昇降自在に装着されたノツクアウトパンチＮを
後退させると共に相対的に前記下金型３２を押し
上げながら、前記上型圧子Ｕの前記発条３９，４
０が圧縮されて上金型４１が後退し、相対的に前
記パンチ４７が素材Ｗに対して前進して上型圧子
Ｕのパンチ４６による中空孔部５０のすえ込みを
行うことを特徴とする回転鍛造によるフランジ付
中空品の成形方法。 ２ 回転鍛造機Ａの傾斜しながら回転する上型圧
子Ｕにおいて、上型圧子Ｕの軸心に沿つてパンチ
４６を設け、そのパンチ４６を内周に保持する円
筒状の上金型４１を前記パンチ４６と同心的にか
つパンチ先端面４７と同一面に先端の押圧肩面４
３を位置させて設け、また前記パンチ４６に対し
前記上金型４１を軸線方向に相対的に後退可能に
装着するとともに、前記上金型の押圧肩面４３が
受ける受圧負荷に対応して圧縮される発条３９，
４０を所望の予圧縮状態で前記上金型４１の反押
圧肩面４４側に装着したことを特徴とする回転鍛
造機の上型圧子。[Scope of Claims] 1. A shaft-shaped material W having a desired length is placed in a punch 4 in a die-cutting space 33 of a lower mold L having a predetermined shape.
The punch 46 is provided with a pressing shoulder surface 43 on the same surface as the tip end surface 47 of the punch on the outer periphery of the punch 6 and the punch 46, and springs 39 and 40 are attached to the anti-pressing shoulder surface 44.
The material W is pressed by an upper mold indenter U that rolls and rotates while tilting and has a cylindrical upper mold 41 that can be relatively retracted in response to the pressure load received. After the lower mold L has been punched down to a sufficiently large diameter, the knockout punch N, which is mounted in the lower mold 32 so as to be able to rise and lower, is retreated and the lower mold 32 is relatively pushed up. The springs 39, 4 of the upper die indenter U
0 is compressed, the upper mold 41 retreats, and the punch 47 moves forward relative to the material W, thereby swaging the hollow hole 50 by the punch 46 of the upper mold indenter U. A method for forming hollow products with flanges by rotary forging. 2. In the upper mold indenter U of the rotary forging machine A that rotates while tilting, a punch 46 is provided along the axis of the upper mold indenter U, and the cylindrical upper mold 41 that holds the punch 46 on the inner periphery is The pressing shoulder surface 4 at the tip is concentric with the punch 46 and on the same plane as the punch tip surface 47.
3, and the upper die 41 is attached to the punch 46 so as to be relatively retractable in the axial direction, and the press shoulder surface 43 of the upper die is compressed in response to the pressure load received 39,
An upper mold indenter for a rotary forging machine, characterized in that an indenter 40 is mounted on the opposite pressing shoulder surface 44 side of the upper mold 41 in a desired precompressed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18257682A JPH0245531B2 (en) | 1982-10-18 | 1982-10-18 | KAITENTANZONYORUFURANJITSUKICHUKUHINNOSEIKEIHOHOOYOBIKAITENTANZOKINOWAGATAATSUSHI |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18257682A JPH0245531B2 (en) | 1982-10-18 | 1982-10-18 | KAITENTANZONYORUFURANJITSUKICHUKUHINNOSEIKEIHOHOOYOBIKAITENTANZOKINOWAGATAATSUSHI |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5973138A JPS5973138A (en) | 1984-04-25 |
| JPH0245531B2 true JPH0245531B2 (en) | 1990-10-09 |
Family
ID=16120689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18257682A Expired - Lifetime JPH0245531B2 (en) | 1982-10-18 | 1982-10-18 | KAITENTANZONYORUFURANJITSUKICHUKUHINNOSEIKEIHOHOOYOBIKAITENTANZOKINOWAGATAATSUSHI |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0245531B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6182944A (en) * | 1984-09-28 | 1986-04-26 | Musashi Seimitsu Kogyo Kk | Production of shaft component with large-sized flange |
| JP3299974B2 (en) * | 1996-05-02 | 2002-07-08 | ヴェーデーベー リングヴァルツテヒニク ゲゼルシャフト ミット ベシュレンクテル ハフツング | Method of rolling bevel gear in axial die mill and tool unit for carrying out the method |
| EP1186363A1 (en) * | 2000-09-12 | 2002-03-13 | Visteon Global Technologies, Inc. | Die for a wobble press |
| US7776166B2 (en) * | 2006-12-05 | 2010-08-17 | Praxair Technology, Inc. | Texture and grain size controlled hollow cathode magnetron targets and method of manufacture |
| JP5822074B2 (en) * | 2012-01-30 | 2015-11-24 | トヨタ自動車株式会社 | Swing forging device |
| CN103736825A (en) * | 2013-12-26 | 2014-04-23 | 柳州正菱集团有限公司 | Punching and swing grinding die of half axle with flange disc |
| CN108080553A (en) * | 2017-12-13 | 2018-05-29 | 重庆嘉萌鸿业科技有限公司 | A kind of hot-rocking-rolling mold for producing auto parts machinery |
| CN112453301A (en) * | 2020-11-02 | 2021-03-09 | 武汉理工大学 | Hot rotary forging forming method for titanium alloy high-rib connecting piece |
| CN116099966B (en) * | 2023-04-07 | 2023-06-16 | 山西天宝集团有限公司 | Down-pressure ring rolling equipment for T-shaped wind power flange |
-
1982
- 1982-10-18 JP JP18257682A patent/JPH0245531B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5973138A (en) | 1984-04-25 |
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