JP2001105072A - Method and die for forming sheet metal member - Google Patents
Method and die for forming sheet metal memberInfo
- Publication number
- JP2001105072A JP2001105072A JP28257999A JP28257999A JP2001105072A JP 2001105072 A JP2001105072 A JP 2001105072A JP 28257999 A JP28257999 A JP 28257999A JP 28257999 A JP28257999 A JP 28257999A JP 2001105072 A JP2001105072 A JP 2001105072A
- Authority
- JP
- Japan
- Prior art keywords
- blank
- die
- conical
- sheet metal
- forming
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ブランクを上下型
間に圧着挟持して回転させつつ、そのブランクの外周部
に転造ロールを押し付けて転造成形する板金製部材の成
形方法、およびその成形金型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a sheet metal member, which comprises rolling a blank by pressing a rolling roll against an outer peripheral portion of the blank while pressing and rotating the blank between upper and lower dies, and a method thereof. It relates to a molding die.
【０００２】[0002]
【従来の技術】板金製部材の成形方法として、中心孔を
有する円板状のブランク、あるいは中央にボス部を成形
したブランクを、回転駆動する上型と従動回転する下型
との間に圧着挟持して回転させつつ、そのブランクの外
周部に転造ロールを押し付けて転造することによって、
例えば、ブランクの外周部に単Ｖ溝やポリＶ溝を冷間で
成形して板金製のＶベルト用プーリを得ることは特公平
８−２９３７５号公報などに公知である。2. Description of the Related Art As a method of forming a sheet metal member, a disk-shaped blank having a center hole or a blank having a boss portion formed at the center is press-bonded between an upper die which is driven to rotate and a lower die which is driven and rotated. By pinching and rolling a rolling roll against the outer periphery of the blank while pinching and rotating,
For example, it is known from Japanese Patent Publication No. 8-29375 or the like to obtain a sheet metal V-belt pulley by cold forming a single V groove or a poly V groove on the outer periphery of a blank.
【０００３】[0003]
【発明が解決しようとする課題】しかるに、上記板金製
部材の成形方法においてブランクは上型の水平面状に形
成された下端面と、下型の同じく水平面状に形成された
上端面との間でブランクの水平面部が圧着挟持される
が、このようなブランクの水平の圧着挟持方式では、そ
の外周部に転造ロールが強く押し付けて転造成形する際
にブランクの材料が径方向外方へ流れ移動する現象が生
じる。これにより、ブランクの中心孔部分に変形が生じ
たり、ブランクが薄くやせる薄肉化現象が生じてその寸
法精度の低下や強度低下を惹き起こすという問題があっ
た。However, in the above-described method of forming a sheet metal member, the blank is formed between the lower end surface of the upper mold formed in a horizontal plane and the upper end surface of the lower mold formed in the same horizontal plane. The horizontal plane portion of the blank is pressed and clamped, but in such a horizontal press and hold method of the blank, the material of the blank flows radially outward when the roll is strongly pressed against the outer peripheral portion and roll-formed. The phenomenon of moving occurs. As a result, there has been a problem that the center hole of the blank is deformed, or the blank becomes thinner, which causes a reduction in dimensional accuracy and strength.
【０００４】このような問題の解決策として、例えば、
特開昭６３−１４０７３２号公報やＷＯ ９８／０５４
４６号公報などに開示されているように円板状のブラン
クに環状リブを同心状に形成する一方、上下型にそのリ
ブに対応する環状凹凸部を形成して、この上下型間にブ
ランクが環状リブを環状凹凸部間に係合するように圧着
挟持される、といった板金製部材の成形方法が提案され
ている。As a solution to such a problem, for example,
JP-A-63-140732 and WO 98/054
As disclosed in, for example, JP-A-46-46, while annular ribs are formed concentrically on a disc-shaped blank, annular concave and convex portions corresponding to the ribs are formed on the upper and lower molds, and the blanks A method of forming a sheet metal member has been proposed in which an annular rib is pressed and clamped so as to engage between annular concave and convex portions.
【０００５】しかしながら、このような解決手段では、
上下型間に圧着挟持されたブランクの外周部に転造ロー
ルを押し付けて転造成形する際に、ブランクの半径方向
の環状リブより内方領域部分の材料が環状リブより径方
向外方へ流れ移動するのは抑止されるが、環状リブより
外方領域部分の材料は、依然として、径方向外方へ流れ
移動する現象が起こるため、未だ、ブランクの半径方向
の環状リブより外方領域部分に薄肉化現象が生じ、この
点で更に改善の余地がある。However, in such a solution,
When the rolling roll is pressed against the outer peripheral portion of the blank pressed and clamped between the upper and lower dies to form the roll, the material in the region inward of the annular rib in the radial direction of the blank flows radially outward from the annular rib. Although the movement is suppressed, the material in the area outside the annular rib still flows outward in the radial direction, so that the material still remains in the area outside the annular rib in the radial direction of the blank. A thinning phenomenon occurs, and there is room for further improvement in this regard.
【０００６】本発明の目的は、上記のような問題点を解
決するためになされたもので、上下型間でのブランクの
圧着挟持方法に工夫を凝らすことによりブランクの中心
孔部分の変形を防止できるばかりか、ブランクの薄肉化
現象をその半径方向全体にわたって抑えることにより強
度を確保できる板金製部材の成形方法およびその成形金
型を提供することにある。SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems, and to prevent deformation of the center hole of the blank by devising a method of press-clamping the blank between the upper and lower dies. In addition, it is an object of the present invention to provide a sheet metal member forming method and a forming die thereof capable of securing strength by suppressing the thinning phenomenon of the blank over the entire radial direction.
【０００７】[0007]
【課題を解決するための手段】本発明の板金製部材の成
形方法は、ブランクを回転駆動する下型の上端面と従動
回転する上型の下端面との間に圧着挟持して回転させつ
つ、上下型の外周から張り出したブランクの外周部に、
該ブランクに追従して従動回転する転造ロールを半径方
向に押し付けて転造成形する板金製部材の成形方法にお
いて、前記ブランクの上下型で圧着挟持される板面部は
予め円錐形に形成し、前記上型の下端面は前記ブランク
の円錐形に合致する凸型円錐面に形成するとともに、前
記下型の上端面は前記ブランクの円錐形に合致する凹型
円錐面に形成して、前記上型の凸型円錐面と下型の凹型
円錐面との間で前記ブランクの円錐形部を圧着挟持する
ことに特徴を有するものである。According to the method of forming a sheet metal member of the present invention, the blank is pressed and held between the upper end surface of a lower die that rotationally drives a blank and the lower end surface of an upper die that is driven to rotate while rotating. , On the outer periphery of the blank that overhangs the outer periphery of the upper and lower molds,
In the method of forming a sheet metal member that is formed by pressing a rolling roll that is driven and rotated in accordance with the blank in the radial direction, a plate surface portion that is pressed and held by the upper and lower molds of the blank is formed in a conical shape in advance, The lower end surface of the upper mold is formed as a convex conical surface conforming to the conical shape of the blank, and the upper end surface of the lower mold is formed as a concave conical surface conforming to the conical shape of the blank. Characterized in that the conical portion of the blank is press-clamped between the convex conical surface of (1) and the concave conical surface of the lower die.
【０００８】本発明の板金製部材の成形金型は、円錐形
状に形成したブランクを、回転駆動する下型の上端面と
従動回転する上型の下端面との間に圧着挟持して回転さ
せつつ、上下型の外周から張り出したブランクの外周部
に、該ブランクに追従して従動回転する転造ロールを半
径方向に押し付けて転造成形する板金製部材の成形方法
に使用される前記上型および下型よりなる成形金型であ
って、前記上型の下端面が前記ブランクの円錐形に合致
する凸型円錐面に形成され、前記下型の上端面が前記ブ
ランクの円錐形に合致する凹型円錐面に形成されている
ことに特徴を有するものである。In the mold for forming a sheet metal member according to the present invention, a blank formed in a conical shape is pressed and held between an upper end surface of a lower die that is driven to rotate and a lower end surface of an upper die that is driven to rotate, and is rotated. Meanwhile, the upper die used in the method of forming a sheet metal member for rolling and forming a roll formed by pressing a rolling roll that is driven and rotated following the blank in the radial direction on the outer peripheral portion of the blank protruding from the outer circumference of the upper and lower molds. And a lower mold, wherein a lower end surface of the upper mold is formed as a convex conical surface conforming to the conical shape of the blank, and an upper end surface of the lower mold conforms to the conical shape of the blank. It is characterized by being formed in a concave conical surface.
【０００９】[0009]
【作用】ブランクの円錐形部を上型の凸型円錐面と下型
の凹型円錐面との間で圧着挟持することにより、ブラン
クの外径が同じ場合ブランクの圧着挟持面積が、ブラン
クが上型の水平な下端面と下型の水平な上端面との間で
圧着挟持される前述した従来のブランク圧着挟持方式の
場合よりは大きくとれ、したがって上下型間に圧着挟持
されたブランクの外周部に転造ロールを押し付けて転造
成形する際に、摩擦力をそれだけ増大できるため、ブラ
ンクの材料が径方向外方へ流れ移動するのが阻止され
る。その結果、中心孔を有するブランクの場合もその中
心孔部分が変形するのを防ぐことができ、またブランク
の薄肉化現象をその半径方向全体にわたって抑止するこ
とができて強度を確保できる。[Function] By clamping the conical portion of the blank between the convex conical surface of the upper die and the concave conical surface of the lower die, if the outer diameter of the blank is the same, the crimping clamping area of the blank is increased. It is larger than in the case of the above-mentioned conventional blank crimping method in which the crimping is clamped between the horizontal lower end surface of the mold and the horizontal upper end surface of the lower mold, and therefore, the outer peripheral portion of the blank crimped between the upper and lower molds. The frictional force can be increased when the roll is pressed against the roll to prevent the blank material from flowing and moving radially outward. As a result, even in the case of a blank having a center hole, the center hole portion can be prevented from being deformed, and the thinning phenomenon of the blank can be suppressed over the entire radial direction, so that the strength can be secured.
【００１０】[0010]
【発明の実施の形態】以下、本発明の一実施の形態を図
面に基づいて説明する。図１は本発明の方法により得ら
れる板金製部材の一例を示す断面図、図２は本転造加工
前に予め成形されたブランクの断面図、図３ないし図６
は本発明の方法による板金製部材の成形工程図である。
但し、図３ないし図６では、ブランク、上型、下型が回
転対称形状であるため、それらを半欠截状態で示してい
る。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of a sheet metal member obtained by the method of the present invention, FIG. 2 is a cross-sectional view of a blank preformed before main rolling, and FIGS.
FIG. 3 is a process chart of forming a sheet metal member by the method of the present invention.
However, in FIGS. 3 to 6, since the blank, the upper die, and the lower die are rotationally symmetrical, they are shown in a semi-cut state.
【００１１】図１に示す板金製部材は、薄い円板状の鋼
板製のブランクを用いて以下の成形方法により転造する
ことにより得られたものであり、中心孔１を有する円形
の基板部２の外周に円周壁部３が一体に成形されてい
る。The sheet metal member shown in FIG. 1 is obtained by rolling using a thin disk-shaped steel sheet blank by the following forming method, and has a circular substrate portion having a center hole 1. A circumferential wall portion 3 is formed integrally with the outer periphery of 2.
【００１２】次に、上記板金製部材の成形方法の一例を
図２ないし図７に基づいて説明する。先ず、プレス成形
で図２のように薄い円板状の鋼板製のブランク４に中心
孔１を設け、この中心孔１の外周の板面部を円錐形に形
成し、この円錐形部５の外周部６は水平面に形成してい
る。Next, an example of a method for forming the sheet metal member will be described with reference to FIGS. First, a center hole 1 is provided in a thin disk-shaped steel blank 4 by press molding as shown in FIG. 2, and a plate surface portion on the outer periphery of the center hole 1 is formed in a conical shape. The part 6 is formed on a horizontal plane.
【００１３】次いで、このように円錐形に形成したブラ
ンク４は図３（Ａ）のように成形金型７にセットする。
成形金型７は上型８と下型９からなる。下型９の上端面
１０はブランク４の円錐形部５の円錐形に合致する凹型
円錐面１１に形成されるとともに、この凹型円錐面１１
の中央にブランク４の中心孔１に対応する突起１２が形
成されている。一方、上型８の下端面１３はブランク４
の円錐形部５の円錐形に合致する凸型円錐面１４に形成
されるとともに、この凸型円錐面１４の中央に下型９の
突起１２を受け入れる凹部１５が形成されている。かく
して、図３（Ａ）のように、ブランク４は中心孔１を下
型９の突起１２に嵌合し、かつ円錐形部５を凹型円錐面
１１上に重ね合わすとともに、外周部６を下型９の上端
面１０から外側へ張り出すように下型９の上端面１０上
に載せる。Next, the conical blank 4 is set in a molding die 7 as shown in FIG.
The molding die 7 includes an upper die 8 and a lower die 9. The upper end surface 10 of the lower mold 9 is formed as a concave conical surface 11 conforming to the conical shape of the conical portion 5 of the blank 4, and the concave conical surface 11
A projection 12 corresponding to the center hole 1 of the blank 4 is formed at the center of the blank 4. On the other hand, the lower end surface 13 of the upper die 8 is
Is formed in a convex conical surface 14 that matches the conical shape of the conical portion 5 of the present invention, and a concave portion 15 for receiving the projection 12 of the lower die 9 is formed in the center of the convex conical surface 14. Thus, as shown in FIG. 3 (A), the blank 4 fits the center hole 1 into the projection 12 of the lower die 9, overlaps the conical portion 5 on the concave conical surface 11, and lowers the outer peripheral portion 6. It is placed on the upper end surface 10 of the lower die 9 so as to project outward from the upper end surface 10 of the die 9.
【００１４】しかる後、図３（Ｂ）のように、上型８を
下降させてこの凸型円錐面１４と下型９の凹型円錐面１
１との間でブランク４の円錐形部５を圧着挟持する。そ
して、下型９を軸心Ｏ1 まわりに回転駆動し、上型８を
従動回転することによってブランク４を回転させつつ、
上下型８，９から外側へ張り出したブランク４の外周部
６に、外周面に断面Ｖ形の溝１６ａを有する増肉成形用
の転造ロール１６の前記溝１６ａを半径方向に強く押し
付けながら該転造ロール１６をブランク４に追従して軸
心Ｏ2 まわりに従動回転させることによって、ブランク
４の外周部６を増肉させる。この増肉外周部１７の増肉
は、転造ロール１６の押し付けに伴って溝１６ａ内で生
じる材料流れによって生起する。Thereafter, as shown in FIG. 3 (B), the upper die 8 is lowered to lower the convex conical surface 14 and the concave conical surface 1 of the lower die 9.
1, the conical portion 5 of the blank 4 is pressed and clamped. Then, the lower mold 9 is driven to rotate about the axis O 1 , and the upper mold 8 is driven to rotate, thereby rotating the blank 4.
The groove 16a of the thickening roll 16 having a V-shaped groove 16a on the outer peripheral surface is strongly pressed against the outer peripheral portion 6 of the blank 4 projecting outward from the upper and lower dies 8, 9 in the radial direction. by rotated about the axis O 2 by following the forming roll 16 to blank 4, it is thickened outer peripheral portion 6 of the blank 4. The increase in the thickness of the outer peripheral portion 17 is caused by a material flow generated in the groove 16a due to the pressing of the roll 16.
【００１５】この増肉成形加工は一度では十分な増肉厚
が得られない場合は、図４（Ａ）、（Ｂ）のように、先
に増肉された外周部１７を有するブランク４の円錐形部
５を、上記上下型８，９と同じ形状に形成された別の上
型１８の凸型円錐面１９と下型２０の凹型円錐面２１と
の間で圧着挟持して回転させつつ、その増肉外周部１７
に転造ロール２２の断面Ｖ形の溝２２ａを半径方向に押
し付けて、もう一度増肉成形加工を繰り返して行う。勿
論、この場合は、図３に示す転造ロール１６の溝１６ａ
よりも溝幅の広い溝２２ａを有する転造ロール２２を用
いることになる。In this thickening forming process, if a sufficient thickening thickness cannot be obtained at one time, as shown in FIGS. 4 (A) and 4 (B), the blank 4 having the outer peripheral portion 17 which has been thickened first is used. The conical portion 5 is pressed and held between the convex conical surface 19 of another upper die 18 and the concave conical surface 21 of the lower die 20 formed in the same shape as the upper and lower dies 8 and 9 while rotating. , Its outer peripheral portion 17
The groove 22a having a V-shaped cross section of the roll 22 is pressed in the radial direction, and the thickening process is repeated once again. Of course, in this case, the groove 16a of the roll 16 shown in FIG.
A rolling roll 22 having a groove 22a having a wider groove width is used.
【００１６】次いで、所望厚に増肉された外周部１７を
もつブランク４は、図５（Ａ）のように、次の湾曲増肉
成形工程に移されてブランク４の増肉外周部１７を湾曲
状にさらに増肉成形する。この工程においては、上記上
下型８，９と同じ形状の上下型２３，２４を使用し、転
造ロール２５はその加工目的に適うように断面円弧形の
溝２５ａを外周面に形成したものを用いる。加工に際し
ては、図５（Ｂ）のように、増肉外周部１７をもつブラ
ンク４の円錐形部５を上型２３の凸型円錐面２６と下型
２４の凹型円錐面２７との間で圧着挟持し、下型２４を
軸心Ｏ1 まわりに回転駆動し、上型２３を従動回転する
ことによってブランク４を回転させつつ、その増肉外周
部１７に転造ロール２５の溝２５ａを半径方向に強く押
し付けながら該転造ロール２５をブランク４に追従して
軸心Ｏ2 まわりに従動回転させることによって、増肉外
周部１７を軸方向下方に曲げながら更に増肉させる。Next, as shown in FIG. 5A, the blank 4 having the outer peripheral portion 17 having a desired thickness is transferred to the next curved thickening forming step, and the outer peripheral portion 17 of the blank 4 is removed. The thickness is further increased in a curved shape. In this step, upper and lower dies 23 and 24 having the same shape as the upper and lower dies 8 and 9 are used. Is used. In processing, as shown in FIG. 5B, the conical portion 5 of the blank 4 having the thickened outer peripheral portion 17 is moved between the convex conical surface 26 of the upper die 23 and the concave conical surface 27 of the lower die 24. The lower die 24 is driven to rotate about the axis O 1 , and the upper die 23 is driven to rotate, thereby rotating the blank 4. by rotated about the axis O 2 of said transfer forming roll 25 while pressing strongly in the direction following the blank 4, further be thickened while bending the thickened peripheral portion 17 downward in the axial direction.
【００１７】次いで、湾曲増肉された増肉外周部１７を
もつブランク４は、図６（Ａ）のように、次の円周壁部
成形工程に移されて増肉外周部１７を円周壁部３に転造
成形する。この工程においても、上記上下型８，９と同
じ形状の上下型２８，２９を使用し、転造ロール３０は
その加工目的に適うように段付き外周面３０ａをもつ形
状に形成したものを用いる。その成形に際しては、図６
（Ｂ）のように、湾曲増肉された増肉外周部１７をもつ
ブランク４の円錐形部５を上型２８の凸型円錐面３１と
下型２９の凹型円錐面３２との間で圧着挟持し、下型２
９を軸心Ｏ1 まわりに回転駆動し、上型２８を従動回転
することによってブランク４を回転させつつ、その増肉
外周部１７に転造ロール３０の段付き外周面３０ａを半
径方向に強く押し付けながら該転造ロール３０をブラン
ク４に追従して軸心Ｏ2 まわりに従動回転させることに
よって、ブランク４の増肉外周部１７を下型２９の外周
壁部２９ａに押し付けて軸方向に真っ直ぐに整形して円
周壁部３を転造成形する。このようにして得られた板金
製部材は図７に示す。Next, as shown in FIG. 6A, the blank 4 having the curved outer peripheral portion 17 is moved to the next peripheral wall forming step, and the outer peripheral portion 17 is replaced with the peripheral wall portion. 3. Roll forming. Also in this step, the upper and lower dies 28 and 29 having the same shape as the upper and lower dies 8 and 9 are used, and the roll 30 is formed into a shape having a stepped outer peripheral surface 30a so as to meet the purpose of the processing. . Fig. 6
As shown in (B), the conical portion 5 of the blank 4 having the curved outer peripheral portion 17 is crimped between the convex conical surface 31 of the upper die 28 and the concave conical surface 32 of the lower die 29. Hold the lower mold 2
9 is rotated around the axis O 1 , and the upper die 28 is driven to rotate, thereby rotating the blank 4, while strongly increasing the stepped outer peripheral surface 30 a of the rolling roll 30 on the thickened outer peripheral portion 17 in the radial direction. by rotated about the axis O 2 by following the said transfer forming roll 30 to blank 4 while pressing straight axially thickened peripheral portion 17 of the blank 4 is pressed against the outer peripheral wall 29a of the lower mold 29 And the circumferential wall 3 is roll formed. FIG. 7 shows the sheet metal member thus obtained.
【００１８】上記の第１，２段階の増肉成形、湾曲増肉
成形、及び円周壁成形のいずれの加工に際しても、ブラ
ンク４は円錐形部５を上型８，１８，２３，２８の凸型
円錐面１４，１９，２６，３１と下型９，２０，２４，
２９の凹型円錐面１１，２１，２７，３２との間でそれ
ぞれ圧着挟持することによりできる限り圧着挟持面積を
大きくとっているので、ブランク４の外周部６に転造ロ
ール１６，２２，２５，３０をそれぞれ押し付けて転造
する際に、摩擦力をそれだけ増大できるため、ブランク
４の材料が径方向外方へ流れ移動するのが阻止される。
したがって、ブランク４の中心孔１部分が変形するのを
防ぐことができ、またブランク４の薄肉化現象をその半
径方向全体にわたって抑止することができる。In any of the first and second steps of the thickening, the curved thickening, and the circumferential wall forming, the blank 4 is formed such that the conical portion 5 is formed by the projections of the upper dies 8, 18, 23, 28. The conical surfaces 14, 19, 26, 31 and the lower dies 9, 20, 24,
Since the crimping and clamping area is as large as possible by crimping between the concave conical surfaces 11, 21, 27 and 32 of 29, the rolls 16, 22, 25, and 22 are formed on the outer peripheral portion 6 of the blank 4. Since the frictional force can be increased correspondingly when each of the rolls 30 is pressed and rolled, the material of the blank 4 is prevented from flowing outward in the radial direction.
Therefore, the center hole 1 of the blank 4 can be prevented from being deformed, and the thinning phenomenon of the blank 4 can be suppressed over the entire radial direction.
【００１９】このようにして得られた図７の板金製部材
は、円錐形部５をプレス成形により図１のように水平に
整形することにより基板部２を形成した後、例えば、そ
の円周壁部３の外周に１つまたは複数のＶ溝を転造整形
することによってＶベルト用プーリとして使用すること
ができ、また、ピストンリングとして使用できるように
その円周壁部３の外周にピストンリング装着用溝を形成
することもできる。その他に、その円周壁部３の内周や
外周にギヤ歯を加工することによって内歯歯車や外歯歯
車に使用することもできる。The sheet metal member of FIG. 7 obtained as described above is obtained by forming the substrate portion 2 by shaping the conical portion 5 horizontally by press molding as shown in FIG. By rolling and shaping one or more V-grooves on the outer periphery of the portion 3, it can be used as a V-belt pulley, and a piston ring is mounted on the outer periphery of the circumferential wall portion 3 so that it can be used as a piston ring. Grooves can also be formed. In addition, it can also be used for an internal gear or an external gear by processing gear teeth on the inner circumference or the outer circumference of the circumferential wall portion 3.
【００２０】板金製部材としては、基板部２の中心に中
心孔１を形成するに代えて、円筒状のボス部を一体に形
成するものにも同様に適用できる。As a sheet metal member, instead of forming the center hole 1 at the center of the substrate portion 2, the present invention can be similarly applied to a member formed integrally with a cylindrical boss portion.
【００２１】[0021]
【発明の効果】本発明によれば、ブランクに予め円錐形
状に形成し、この円錐形部を上型の凸型円錐面と下型の
凹型円錐面との間で圧着挟持するようにしてあるので、
そのブランクの外周部に転造ロールを押し付けて転造成
形する際に、中心孔や筒状ボスを有するブランクの場合
もその中心孔や筒状ボス部分が変形するのを防ぐことが
できて精度の向上を図れ、またブランクの薄肉化現象を
その半径方向全体にわたって抑止することができて強度
の確保を図れるという利点がある。According to the present invention, the blank is formed in a conical shape in advance, and the conical portion is crimped between the convex conical surface of the upper die and the concave conical surface of the lower die. So
When a roll having a center hole or a cylindrical boss is formed by pressing a rolling roll against the outer peripheral portion of the blank, the center hole and the cylindrical boss can be prevented from being deformed even in the case of a blank having a central boss. In addition, there is an advantage that the thinning of the blank can be suppressed over the entire radial direction and the strength can be secured.
【図１】板金製部材の断面図である。FIG. 1 is a cross-sectional view of a sheet metal member.
【図２】本転造加工前に予め成形されたブランクの断面
図である。FIG. 2 is a cross-sectional view of a blank that has been formed before a main rolling process.
【図３】（Ａ）は板金製部材の第１段階の増肉成形工程
を加工前の状態で示す半欠截断面図、（Ｂ）は加工後の
状態を示す半欠截断面図である。FIG. 3A is a partially cutaway sectional view showing a first stage of a thickening forming step of a sheet metal member before processing, and FIG. 3B is a partially cutaway sectional view showing a state after processing. .
【図４】（Ａ）は板金製部材の第２段階の増肉成形工程
を加工前の状態で示す半欠截断面図、（Ｂ）は加工後の
状態を示す半欠截断面図である。FIG. 4A is a partially cutaway sectional view showing a second stage of the thickening forming step of a sheet metal member before processing, and FIG. 4B is a partially cutaway sectional view showing a state after processing. .
【図５】（Ａ）は板金製部材の湾曲増肉成形工程を加工
前の状態で示す半欠截断面図、（Ｂ）は加工後の状態を
示す半欠截断面図である。FIG. 5A is a partially cutaway cross-sectional view showing a process of forming a sheet metal member in a curved thickness increasing state before processing, and FIG. 5B is a partially cutaway sectional view showing a state after processing.
【図６】（Ａ）は板金製部材の円周壁部成形工程を加工
前の状態で示す半欠截断面図、（Ｂ）は加工後の状態を
示す半欠截断面図である。FIG. 6A is a partially cutaway sectional view showing a step of forming a circumferential wall portion of a sheet metal member before processing, and FIG. 6B is a partially cutaway sectional view showing a state after processing.
【図７】円周壁部成形直後の板金製部材の断面図であ
る。FIG. 7 is a cross-sectional view of a sheet metal member immediately after forming a circumferential wall portion.
１ 中心孔 ２ 基板部 ３ 円周壁部 ４ ブランク ５ 円錐形部 ６ 外周部 ７ 成形金型 ８，１８，２３，２８ 上型 ９，２０，２４，２９ 下型 １１，２１，２７，３２ 凹型円錐面 １４，１９，２６，３１ 凸型円錐面 １６，２２，２５，３０ 転造ロール １７ 増肉外周部 DESCRIPTION OF SYMBOLS 1 Center hole 2 Substrate part 3 Circumferential wall part 4 Blank 5 Conical part 6 Outer part 7 Molding die 8, 18, 23, 28 Upper die 9, 20, 24, 29 Lower die 11, 21, 27, 32 Concave cone Surface 14, 19, 26, 31 Convex conical surface 16, 22, 25, 30 Rolling roll 17 Thickening outer peripheral portion
Claims (2)
従動回転する上型の下端面との間に圧着挟持して回転さ
せつつ、上下型の外周から張り出したブランクの外周部
に、該ブランクに追従して従動回転する転造ロールを半
径方向に押し付けて転造成形する板金製部材の成形方法
において、 前記ブランクの上下型で圧着挟持される板面部は予め円
錐形に形成し、前記上型の下端面は前記ブランクの円錐
形に合致する凸型円錐面に形成するとともに、前記下型
の上端面は前記ブランクの円錐形に合致する凹型円錐面
に形成して、前記上型の凸型円錐面と下型の凹型円錐面
との間で前記ブランクの円錐形部を圧着挟持することを
特徴とする板金製部材の成形方法。1. An outer peripheral portion of a blank protruding from an outer periphery of an upper and lower die while being pressed and held between an upper end surface of a lower die that rotationally drives a blank and a lower end surface of an upper die that is driven to rotate. In a forming method of a sheet metal member that is formed by pressing a rolling roll that rotates following a blank in the radial direction and press-forming in a radial direction, a plate surface portion that is pressed and clamped by an upper and lower mold of the blank is previously formed into a conical shape, The lower end surface of the upper mold is formed as a convex conical surface conforming to the conical shape of the blank, and the upper end surface of the lower mold is formed as a concave conical surface conforming to the conical shape of the blank. A method for forming a sheet metal member, comprising: pressing and clamping the conical portion of the blank between a convex conical surface and a concave conical surface of a lower die.
動する下型の上端面と従動回転する上型の下端面との間
に圧着挟持して回転させつつ、上下型の外周から張り出
したブランクの外周部に、該ブランクに追従して従動回
転する転造ロールを半径方向に押し付けて転造成形する
板金製部材の成形方法に使用される前記上型および下型
よりなる成形金型であって、 前記上型の下端面が前記ブランクの円錐形に合致する凸
型円錐面に形成され、前記下型の上端面が前記ブランク
の円錐形に合致する凹型円錐面に形成されていることを
特徴とする板金製部材の成形金型。2. A blank protruding from the outer periphery of an upper and lower mold while pressing and rotating a conical blank formed between an upper end face of a lower mold that is driven to rotate and a lower end face of an upper mold that is driven to rotate. A forming die comprising the upper die and the lower die used in a method of forming a sheet metal member for forming a roll by pressing a rolling roll that is driven to rotate following the blank in the radial direction. Wherein the lower end surface of the upper die is formed as a convex conical surface that matches the conical shape of the blank, and the upper end surface of the lower die is formed as a concave conical surface that matches the conical shape of the blank. A molding die for sheet metal members.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28257999A JP3780128B2 (en) | 1999-10-04 | 1999-10-04 | Sheet metal member forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28257999A JP3780128B2 (en) | 1999-10-04 | 1999-10-04 | Sheet metal member forming method |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003126458A Division JP3725136B2 (en) | 2003-05-01 | 2003-05-01 | Sheet metal member forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001105072A true JP2001105072A (en) | 2001-04-17 |
| JP3780128B2 JP3780128B2 (en) | 2006-05-31 |
Family
ID=17654341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28257999A Expired - Lifetime JP3780128B2 (en) | 1999-10-04 | 1999-10-04 | Sheet metal member forming method |
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| Country | Link |
|---|---|
| JP (1) | JP3780128B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016017213A1 (en) * | 2014-07-31 | 2016-02-04 | 日立オートモティブシステムズ株式会社 | Piston manufacturing device, piston manufacturing method, piston, and disc brake |
-
1999
- 1999-10-04 JP JP28257999A patent/JP3780128B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016017213A1 (en) * | 2014-07-31 | 2016-02-04 | 日立オートモティブシステムズ株式会社 | Piston manufacturing device, piston manufacturing method, piston, and disc brake |
| JPWO2016017213A1 (en) * | 2014-07-31 | 2017-04-27 | 日立オートモティブシステムズ株式会社 | Piston manufacturing apparatus, piston manufacturing method, piston and disc brake |
| CN106660105A (en) * | 2014-07-31 | 2017-05-10 | 日立汽车系统株式会社 | Piston manufacturing device, piston manufacturing method, piston, and disc brake |
| US10247269B2 (en) | 2014-07-31 | 2019-04-02 | Hitachi Automotive Systems, Ltd. | Piston manufacturing device, piston manufacturing method, piston and disc brake |
| CN106660105B (en) * | 2014-07-31 | 2019-09-13 | 日立汽车系统株式会社 | Piston manufacturing apparatus, method for making piston, piston and disk brake |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3780128B2 (en) | 2006-05-31 |
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