JPH1177217A - Forging and heading tool - Google Patents
Forging and heading toolInfo
- Publication number
- JPH1177217A JPH1177217A JP23822697A JP23822697A JPH1177217A JP H1177217 A JPH1177217 A JP H1177217A JP 23822697 A JP23822697 A JP 23822697A JP 23822697 A JP23822697 A JP 23822697A JP H1177217 A JPH1177217 A JP H1177217A
- Authority
- JP
- Japan
- Prior art keywords
- nib
- forging
- hole
- sleeve
- pieces
- 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
Landscapes
- Forging (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する分野】本発明は、同形状のニブ小片を組
み合わせて正多角形の型穴を形成した鍛造・圧造用工具
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forging / forging tool in which nib pieces having the same shape are combined to form a regular polygonal mold hole.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】図１１
に示す如く、略扇形の同形のニブ小片(91)(91)を４個環
状に組み合わせて、中央に正方形の型穴(90)を形成した
ニブ(９)を構成し、これをスリーブ(96)を介してケース
(97)に保持した鍛造・圧造用工具が提案されている。上
記鍛造・圧造用工具は、各ニブ小片(91)の内側面(92)は
フラットであるが、外側面(93)は円弧面であるため、ニ
ブ小片(91)を１個づつ加工機にセットしてこの円弧面を
高精度に加工することは難しい。４つのニブ小片(91)を
ニブ(２)の状耐に配置して、外面を円錐状に加工しよう
としても、ニブ(２)の外面を掴むと、外面の加工が出来
なくなる。2. Description of the Related Art FIG.
As shown in the figure, a nib (9) having a square mold hole (90) formed at the center is formed by combining four substantially fan-shaped nib pieces (91) and (91) having the same shape in an annular shape, and this is formed into a sleeve (96). ) Through the case
A forging / forging tool held in (97) has been proposed. In the forging / forging tool, since the inner surface (92) of each nib piece (91) is flat, but the outer surface (93) is an arc surface, the nib pieces (91) are processed one by one by a processing machine. It is difficult to set and machine this arc surface with high precision. Even if the outer surface of the nib (2) is grasped by gripping the outer surface of the nib (2) by arranging the four nib pieces (91) in the shape of the nib (2), the outer surface cannot be processed.
【０００３】そこで、図１０に示す如く、ニブ小片(91)
の形状を台形とした鍛造・圧造用工具(特公平２−６２
３４２号)も提案されている。この場合、ニブ小片(91)
の上底(94)と下底(95)は平行であるため、加工は容易と
なるが、正方形のニブ(９)の対角長さＬ１が長くなるた
め、スリーブ(96)の外径を大きくせねばならず、ケース
(97)も大型化する問題が生じた。本発明は、図１０にお
いて、ニブ(95)の角部を二点鎖線Ｘで示す如く、４５°
の角度で切り落とした形状とすることにより、上記問題
を解決できる鍛造・圧造用工具を明らかにするものであ
る。[0003] Therefore, as shown in FIG.
Forging and forging with trapezoidal shape (Tokiho 2-62)
342) has also been proposed. In this case, nib pieces (91)
Since the upper base (94) and the lower base (95) are parallel, machining is easy, but since the diagonal length L1 of the square nib (9) becomes longer, the outer diameter of the sleeve (96) is reduced. Must be big, case
(97) also had the problem of becoming larger. In the present invention, as shown in FIG. 10, the corner of the nib (95) is
The present invention is intended to clarify a forging / forging tool capable of solving the above-mentioned problem by forming a shape cut off at an angle.
【０００４】[0004]
【課題を解決する手段】本発明の鍛造・圧造用工具は、
同形のニブ小片を４個環状に組み合わせてなるニブをケ
ースに保持し、ニブの中央に正方形の型穴を形成してお
り、ニブ(２)は組立て状態において正面側端面は八角形
であり、ニブ小片(３)の正面側端面は長手方向に左右対
称の六角形であり、両端の尖り部の角度α1は９０°で
あって、残りの４つの角部の角度α2は１３５°であ
る。The tool for forging and forging according to the present invention comprises:
A nib formed by combining four nib pieces of the same shape in a ring shape is held in a case, and a square mold hole is formed in the center of the nib. The nib (2) has an octagonal front end face in an assembled state, The front end face of the nib piece (3) is a hexagon which is symmetrical in the longitudinal direction, the angle α 1 of the sharp portions at both ends is 90 °, and the angle α 2 of the remaining four corners is 135 °. is there.
【０００５】同型のニブ小片(3a)を６個環状に組み合わ
せて、中央に正六角形の型穴(4a)を有する鍛造・圧造用
工具も実施でき、この場合、ニブ(2a)は組立て状態にお
いて、正面側端面は十二角形であり、ニブ小片(3a)の正
面側端面は長手方向に左右対称の六角形であり、両端の
尖り部の角度α3は９０°であって、型穴側の両角部の
角度α4は１２０°、残りの２つの角部の角度α5は１５
０°である。[0005] A forging / forging tool having a regular hexagonal mold hole (4a) in the center can also be implemented by combining six nib pieces (3a) of the same shape in an annular shape. In this case, the nib (2a) is assembled in an assembled state. , The front end face is a dodecagon, the front end face of the nib piece (3a) is a hexagon that is bilaterally symmetric in the longitudinal direction, and the angle α 3 of the sharp part at both ends is 90 °, and the mold hole side The angle α 4 of both corners is 120 °, and the angle α 5 of the remaining two corners is 15
0 °.
【０００６】隣り合うニブ小片(３)(３)の突き合わせ面
(35)(35)と直交する面(36)とスリーブ(５)の孔面との間
に、スリーブ(５)の上下面に達する隙間(50)を形成して
もよい。Abutting surfaces of adjacent nib pieces (3) and (3)
(35) A gap (50) reaching the upper and lower surfaces of the sleeve (5) may be formed between the surface (36) orthogonal to the (35) and the hole surface of the sleeve (5).
【０００７】ニブ(２)をスリーブ(５)を介してケース
(１)に保持し、スリーブ(５)のニブ収容孔(51)の孔面
を、型穴(４)の開口側が狭まる様に傾斜したテーパ面(5
2)となし、各ニブ小片(３)の該孔面に接する外側面(32)
を、テーパ面(52)に対応するテーパ面となしてもよい。[0007] The nib (2) is connected to the case via the sleeve (5).
(1), the hole surface of the nib receiving hole (51) of the sleeve (5) is tapered (5) so that the opening side of the mold hole (4) is narrowed.
2) and the outer surface (32) of each nib piece (3) in contact with the hole surface
May be a tapered surface corresponding to the tapered surface (52).
【０００８】[0008]
【作用及び効果】図１に示す如く、４つのニブ小片(３)
を環状に組み立ててニブ(２)を形成した状態では、図１
０の従来例の正方形のニブ(９)に対して２点鎖線Ｘで示
す様に、ニブ(９)の角部を４５°の角度で切り落とした
形状となるから、ニブの対角長さは短くなり、その分ケ
ースも小さくできる。図４に示す如く、ニブ小片(３)の
各面はフラットであるから、該ニブ小片の加工は、従来
の円弧面を有するニブ小片の加工に比べて遙かに容易で
ある。[Operation and Effect] As shown in FIG. 1, four nib pieces (3)
In a state where the nibs (2) are formed by assembling the
As shown by the two-dot chain line X with respect to the square nib (9) of the conventional example of No. 0, since the corner of the nib (9) is cut off at an angle of 45 °, the diagonal length of the nib is It is shorter and the case can be made smaller. As shown in FIG. 4, since each surface of the nib piece (3) is flat, machining of the nib piece is much easier than machining of a conventional nib piece having an arc surface.
【０００９】図９に示す如く、６つのニブ小片(3a)を組
み合わせても、２点鎖線Ｙで示す部分がカットされて存
在しないため、ニブ(2a)全体の外径を小さくでき、その
分ケースも小さくできる。As shown in FIG. 9, even when the six nib pieces (3a) are combined, since the portion indicated by the two-dot chain line Y is not present, the outer diameter of the entire nib (2a) can be reduced. The case can be made smaller.
【００１０】図７に示す隣り合うニブ小片(３)(３)の突
き合わせ面(35)(35)と直交する面(36)と、スリーブ(５)
の孔面(51)との間に、スリーブ(５)の上下面に達する隙
間(50)を形成した場合、型穴(４)の底部と該隙間(50)を
微細な通路で連通させることにより、該隙間(50)をエア
ー抜き孔とすることができる。A surface (36) orthogonal to the butting surfaces (35) (35) of the adjacent nib pieces (3) (3) shown in FIG. 7 and a sleeve (5).
When a gap (50) reaching the upper and lower surfaces of the sleeve (5) is formed between the gap (50) and the hole (51), the bottom of the mold hole (4) and the gap (50) should be communicated with a fine passage. Thereby, the gap (50) can be used as an air vent hole.
【００１１】スリーブ(５)のニブ収容孔(51)の孔面を、
型穴(４)の開口側が狭まる様に傾斜したテーパ面(52)と
なし、各ニブ小片(３)の該孔面に接する外側面(32)を、
テーパ面(52)に対応するテーパ面とすることにより、ニ
ブ(２)の厚みが小さくとも、ニブ(２)がスリーブ(５)の
ニブ収容孔(51)の小径側から抜け出すことを確実に防止
できる。The nib receiving hole (51) of the sleeve (5) is
The outer surface (32) of each nib piece (3) contacting the hole surface is formed as a tapered surface (52) inclined so that the opening side of the mold hole (4) becomes narrower.
By making the tapered surface corresponding to the tapered surface (52), even if the nib (2) is small in thickness, it is ensured that the nib (2) comes out from the small diameter side of the nib receiving hole (51) of the sleeve (5). Can be prevented.
【００１２】[0012]
【発明の実施の態様】図１、図２、図３に示す実施例の
鍛造・圧造用工具は、四角ナット等、外形が正方形の製
品を成形するためのダイスであり、図１は正面図、図２
は図１Ｘ−Ｘ線に沿う断面図、図３はＹ−Ｙ線に沿う断
面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The forging / forging tool of the embodiment shown in FIGS. 1, 2 and 3 is a die for forming a square-shaped product such as a square nut, and FIG. 1 is a front view. , FIG. 2
FIG. 1 is a sectional view taken along the line XX of FIG. 1 and FIG. 3 is a sectional view taken along the line YY of FIG.
【００１３】該ダイスのケース(１)は、先端側に開口す
る逆テーパ孔(11)及び該逆テーパ孔(11)に連通しケース
の後端に開口するストレート孔(12)を軸芯に開設してい
る。ケース(１)の逆テーパ孔(11)には、外形円錐状のス
リーブ(５)が圧入され、ストレート孔(12)にはニブ受け
台(７)及び押し上げ台(８)が嵌まっている。ニブ受け台
(７)の軸芯に突き出しピン案内孔(71)が開設されてい
る。スリーブ(５)は、軸芯に開設した逆テーパ状の正八
角形のニブ収容孔(11)にニブ(２)を圧入して保持してい
る。The case (1) of the die has an inverted tapered hole (11) opened on the front end side and a straight hole (12) opened to the rear end of the case communicating with the inverted tapered hole (11). Has been established. An outer conical sleeve (5) is press-fitted into the reverse tapered hole (11) of the case (1), and a nib receiving stand (7) and a push-up stand (8) are fitted into the straight hole (12). . Nib cradle
A protruding pin guide hole (71) is formed in the axis of (7). The sleeve (5) presses and holds the nib (2) into a regular tapered octagonal nib receiving hole (11) formed in the shaft core.
【００１４】ニブ(２)は、超硬合金製の同形の４個のニ
ブ小片(３)を環状に配置して構成され、ニブ(２)の正面
側端面は正八角形であり、中央に正方形の型穴(４)を形
成している。型穴(４)の各角部は八角形のニブ収容孔(5
1)の辺の中央部に向いている。各ニブ小片(３)の正面側
端面は長手方向に左右対称の六角形であり、両端の尖り
部の角度α1は９０°であって、残りの４つの角部の角
度α2は１３５°であるThe nib (2) is formed by arranging four identical nib pieces (3) made of cemented carbide in an annular shape, and the front end face of the nib (2) is a regular octagon and a square in the center. The mold cavity (4) is formed. Each corner of the mold hole (4) is an octagonal nib receiving hole (5
It faces the center of side 1). The front end face of each nib piece (3) is a hexagon which is bilaterally symmetrical in the longitudinal direction, the angle α 1 of the sharp ends at both ends is 90 °, and the angle α 2 of the remaining four corners is 135 ° Is
【００１５】ニブ小片(３)の正面側の端面において、型
穴(４)の一辺となる内側縁(33)の長さＬ２は、該側縁と
平行な反対側の外側縁の長さＬ３よりも短い。該外側縁
Ｌ３に連続する両斜辺の長さＬ４は、Ｌ３の１／２であ
る。ニブ小片(３)のスリーブ(５)のニブ収容孔(51)に接
する外側面(32)は、該孔(11)のテーパ面(52)に対応する
テーパ面となっている。On the front end face of the nib piece (3), the length L2 of the inner edge (33), which is one side of the mold hole (4), is the length L3 of the outer edge on the opposite side parallel to the side edge. Shorter than. The length L4 of both oblique sides continuing to the outer edge L3 is １ ／ of L3. The outer surface (32) of the nib piece (3) in contact with the nib receiving hole (51) of the sleeve (5) is a tapered surface corresponding to the tapered surface (52) of the hole (11).
【００１６】上記各ニブ小片(３)の全面、ケース(１)の
逆テーパ孔(12)の孔面、スリーブ(５)の全面に、化学蒸
着(ＣＶＤ)によるＴｉＣ又はＴｉＣＮの耐焼き付き性の
改質層或いは物理蒸着(ＰＶＤ)によるＴｉＮの耐焼き付
き性の改質層が形成されている。The seizure resistance of TiC or TiCN by chemical vapor deposition (CVD) is applied to the entire surface of each nib piece (3), the surface of the reverse tapered hole (12) of the case (1), and the entire surface of the sleeve (5). A modified layer or a modified layer having a seizure resistance of TiN formed by physical vapor deposition (PVD) is formed.
【００１７】然して、図１に示す如く、４つのニブ小片
(３)を環状に組み立ててニブ(２)を形成した状態では、
図１０の従来例の正方形のニブ(９)に対して２点鎖線Ｘ
で示す様に、ニブ(９)の角部を４５°の角度で切り落と
した形状となるから、ニブの対角長さは短くなり、その
分ケースも小さくできる。図４に示す如く、ニブ小片
(３)の各面はフラットであるから、該ニブ小片の加工
は、従来の円弧面を有するニブ片の加工に比べて遙かに
容易である。However, as shown in FIG.
In the state where (3) is assembled into a ring to form a nib (2),
A two-dot chain line X corresponds to the square nib (9) of the conventional example shown in FIG.
Since the nib (9) has a shape cut off at an angle of 45 ° as shown by, the diagonal length of the nib is shortened, and the case can be reduced accordingly. As shown in FIG. 4, nib pieces
Since each surface of (3) is flat, the processing of the nib piece is much easier than the conventional processing of the nib piece having a circular arc surface.
【００１８】図５は、各ニブ小片(３)(３)の両端角部を
内、外側縁(33)(34)と直交してカットし、隣り合うニブ
小片(３)(３)とスリーブ(５)との間にエアー抜き通路(2
1)を形成した実施例を示している。FIG. 5 is a cross-sectional view of the nib pieces (3) and (3) cut at right angles to the inner and outer edges (33) and (34). (5) Air vent passage (2)
1 shows an embodiment in which 1) is formed.
【００１９】図６は、各ニブ小片(３)の内側縁(33)の長
さＬ2よりも外側縁(34)の長さＬ3が大である実施例を示
している。[0019] Figure 6, the length L 3 of the inner edge outer edge than the length L 2 of (33) (34) of each nib pieces (3) shows an the embodiment where large.
【００２０】図７は、隣り合うニブ小片(３)(３)の突き
合わせ面(35)と直交する面(36)と、スリーブ(５)の孔面
との間に、スリーブの上下面に貫通する隙間(50)を形成
した他の実施例を示している。隙間(50)は、ニブ(３)に
作用する応力逃がし、エアー抜きの役割を成す。FIG. 7 shows the upper and lower surfaces of the sleeve between the surface (36) orthogonal to the butting surface (35) of the adjacent nib pieces (3) and (3) and the hole surface of the sleeve (5). Another embodiment in which a gap (50) is formed is shown. The gap (50) serves to relieve the stress acting on the nib (3) and to release air.
【００２１】図８は、各ニブ小片(３)の内側縁(33)の長
さＬ２と外側縁(34)の長さＬ３が等しく、内外両面(31
a)(32a)は平行面であり、スリーブのニブ収容孔(11)も
ストレート孔である他の実施例を示している。図８の場
合、ニブ小片(３)を内外面を反対側にして使用できるた
め、ニブの寿命を延ばすことが出来る。FIG. 8 shows that the length L2 of the inner edge (33) and the length L3 of the outer edge (34) of each nib piece (3) are equal,
a) and (32a) are parallel planes, showing another embodiment in which the nib receiving hole (11) of the sleeve is also a straight hole. In the case of FIG. 8, the nib piece (3) can be used with the inner and outer surfaces opposite to each other, so that the life of the nib can be extended.
【００２２】図９は、６個の同形ニブ小片(3a)を用い、
正六角形の型孔(4a)を形成するニブ(2a)の他の実施例を
示している。ニブ(2a)は組立て状態において正面側端面
は十二角形であり、ニブ小片(3a)の正面側端面は長手方
向に左右対称の六角形であり、両端の尖り部の角度α3
は９０°であって、型穴(4a)側の両角部の角度α4は１
２０°、残りの２つの角部の角度α5は１５０°であるFIG. 9 uses six identical nib pieces (3a),
Another embodiment of the nib (2a) forming a regular hexagonal mold hole (4a) is shown. The nib (2a) has a dodecagonal front end face in the assembled state, the front end face of the nib piece (3a) has a hexagonal shape symmetrical in the longitudinal direction, and the angle α 3
Is 90 °, and the angle α 4 of both corners on the mold hole (4a) side is 1
20 °, the angle α 5 between the remaining two corners is 150 °
【００２３】本発明の実施に際し、スリーブ(５)を省略
し、ケース(１)に直接にニブ収容孔を開設して、ニブ
(５)を圧入することができるのは勿論である。又、ニブ
(２)の型穴(４)の底面、即ち、受け台(７)に下型(図示
せず)を形成することも出来る。更に、本発明は、実施
例のダイスに限らず、鍛造・圧造用パンチ、ボルトの頭
を多角形にトリミングするトリミングダイス等、分割型
のニブを有する鍛造・圧造用工具一般に実施でき、又、
上記実施例の構成に限定されることはなく、特許請求の
範囲に記載の範囲で種々の変形が可能である。In practicing the present invention, the sleeve (5) is omitted, and the nib receiving hole is opened directly in the case (1).
It goes without saying that (5) can be press-fitted. Also, nib
A lower die (not shown) can be formed on the bottom surface of the die hole (4) of (2), that is, on the receiving stand (7). Further, the present invention is not limited to the die of the embodiment, forging and forging punches, trimming dies for trimming the head of the bolt into a polygon, such as forging and forging tools having a divided nib can be generally implemented,
The present invention is not limited to the configuration of the above embodiment, and various modifications can be made within the scope described in the claims.
【図１】ダイスの正面図である。FIG. 1 is a front view of a die.
【図２】図１Ｘ−Ｘ線に沿う断面図である。FIG. 2 is a sectional view taken along the line XX of FIG. 1;
【図３】図１Ｙ−Ｙ線に沿う断面図である。FIG. 3 is a sectional view taken along the line YY of FIG. 1;
【図４】ニブ小片の斜面図である。FIG. 4 is a perspective view of a nib piece.
【図５】エアー逃がし隙間を形成したニブをスリーブに
組み込んだ正面図である。FIG. 5 is a front view in which a nib having an air release gap is incorporated in a sleeve.
【図６】内側縁よりも外側縁の方が長いニブ小片をスリ
ーブに組み込んだ正面図である。FIG. 6 is a front view in which a nib piece whose outer edge is longer than its inner edge is incorporated in a sleeve.
【図７】Ａ図は、エアー逃がし隙間の他の実施例例の正
面図、Ｂ図は、Ａ図のＸ−Ｘ線に沿う断面図、Ｃ図は、
Ａ図のＹ−Ｙ線に沿う断面図である。7A is a front view of another embodiment of the air release gap, FIG. 7B is a sectional view taken along line XX of FIG. A, and FIG.
It is sectional drawing which follows the YY line of A figure.
【図８】Ａ図は、内側縁と外側縁の長さが等しいニブ小
片をスリーブに組み込んだ正面図、Ｂ図はＡ図のＸ−Ｘ
線に沿う断面図である。FIG. 8A is a front view in which a nib piece having the same length of the inner edge and the outer edge is incorporated into a sleeve, and FIG.
It is sectional drawing which follows a line.
【図９】６個のニブ小片をスリーブに組み込んだ正面図
である。FIG. 9 is a front view in which six nib pieces are incorporated in a sleeve.
【図１０】台形のニブ小片をスリーブに組み込んだ従来
例の正面図である。FIG. 10 is a front view of a conventional example in which a trapezoidal nib piece is incorporated in a sleeve.
【図１１】扇形のニブ小片を組み込んだ従来例の正面図
である。FIG. 11 is a front view of a conventional example incorporating a fan-shaped nib piece.
(１) ケース (２) ニブ (３) ニブ小片 (４) 型穴 (５) スリーブ (51) ニブ収容孔 (1) Case (2) Nib (3) Nib piece (4) Mold hole (5) Sleeve (51) Nib receiving hole
Claims (4)
てなるニブをケースに保持し、ニブの中央に正方形の型
穴を形成した鍛造・圧造用工具であって、ニブ(２)は組
立て状態において正面側端面は八角形であり、ニブ小片
(３)の正面側端面は長手方向に左右対称の六角形であ
り、両端の尖り部の角度α1は９０°であって、残りの
４つの角部の角度α2は１３５°である鍛造・圧造用工
具。1. A forging / forging tool in which a nib formed by combining four identical nib pieces in an annular shape is held in a case, and a square mold hole is formed in the center of the nib. In the state, the front end face is octagonal and nib pieces
The front end face of (3) is a hexagon which is bilaterally symmetrical in the longitudinal direction, the angle α 1 of the sharp portions at both ends is 90 °, and the angle α 2 of the remaining four corners is 135 °. -Tools for forging.
てなるニブをケースに保持し、ニブの中央に正六角形の
型穴を形成した鍛造・圧造用工具であって、ニブ(２)は
組立て状態において正面側端面は十二角形であり、ニブ
小片(3a)の正面側端面は長手方向に左右対称の六角形で
あり、両端の尖り部の角度α3は９０°であって、型穴
(4a)側の両角部の角度α4は１２０°、残りの２つの角
部の角度α5は１５０°である鍛造・圧造用工具。2. A forging / forging tool in which a nib formed by combining six identical nib pieces in an annular shape is held in a case, and a regular hexagonal mold hole is formed in the center of the nib. front end surface in the assembled state is dodecagon, front end face of the nib pieces (3a) is a hexagonal symmetrical in the longitudinal direction, an angle alpha 3 of pointed portions at both ends is a 90 °, the mold hole
(4a) A forging / forging tool in which the angle α 4 of both corners on the side is 120 ° and the angle α 5 of the remaining two corners is 150 °.
(１)に保持され、スリーブ(５)のニブ収容孔(51)の孔面
は、型穴(４)の開口側が狭まる様に傾斜したテーパ面(5
2)であり、各ニブ小片(３)の該テーパ面に接する外側面
(32)は、テーパ面(52)に対応するテーパ面となっている
請求項１又は２に記載の鍛造・圧造用工具。3. The nib (2) is connected to the case via a sleeve (5).
(1), the hole surface of the nib receiving hole (51) of the sleeve (5) has a tapered surface (5) inclined so that the opening side of the mold hole (4) is narrowed.
2), the outer surface of each nib piece (3) in contact with the tapered surface
The forging / forging tool according to claim 1 or 2, wherein the (32) is a tapered surface corresponding to the tapered surface (52).
面(35)(35)と直交する面(36)と、スリーブ(５)の孔面と
の間は、スリーブ(５)の上下面に達する隙間(50)が生じ
ている請求項１乃至３の何れかに記載の鍛造・圧造用工
具。4. A sleeve (5) is provided between a surface (36) orthogonal to the abutting surfaces (35) (35) of adjacent nib pieces (3) (3) and a hole surface of the sleeve (5). The forging / forging tool according to any one of claims 1 to 3, wherein a gap (50) reaching the upper and lower surfaces is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23822697A JP2895030B2 (en) | 1997-09-03 | 1997-09-03 | Forging and forging tools |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23822697A JP2895030B2 (en) | 1997-09-03 | 1997-09-03 | Forging and forging tools |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1177217A true JPH1177217A (en) | 1999-03-23 |
| JP2895030B2 JP2895030B2 (en) | 1999-05-24 |
Family
ID=17027031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23822697A Expired - Fee Related JP2895030B2 (en) | 1997-09-03 | 1997-09-03 | Forging and forging tools |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2895030B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006289445A (en) * | 2005-04-12 | 2006-10-26 | Nippon Steel Corp | Mold for hydroforming |
| CN103252409A (en) * | 2013-03-20 | 2013-08-21 | 中北大学 | Near-net forming die for high-strength internal hexagonal through-hole bolt |
-
1997
- 1997-09-03 JP JP23822697A patent/JP2895030B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006289445A (en) * | 2005-04-12 | 2006-10-26 | Nippon Steel Corp | Mold for hydroforming |
| JP4533220B2 (en) * | 2005-04-12 | 2010-09-01 | 新日本製鐵株式会社 | Hydroform mold |
| CN103252409A (en) * | 2013-03-20 | 2013-08-21 | 中北大学 | Near-net forming die for high-strength internal hexagonal through-hole bolt |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2895030B2 (en) | 1999-05-24 |
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