JPS6012227A - Method for producing pipe material from plate material and die for ironing - Google Patents
Method for producing pipe material from plate material and die for ironingInfo
- Publication number
- JPS6012227A JPS6012227A JP58120276A JP12027683A JPS6012227A JP S6012227 A JPS6012227 A JP S6012227A JP 58120276 A JP58120276 A JP 58120276A JP 12027683 A JP12027683 A JP 12027683A JP S6012227 A JPS6012227 A JP S6012227A
- Authority
- JP
- Japan
- Prior art keywords
- punch
- die
- product
- ironing
- plate
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/28—Deep-drawing of cylindrical articles using consecutive dies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、板材を絞り加工した後にしごき加工して肉厚
を均一化すると共に断面形状を整え、その後両端を切削
することにより、板材から所定長さの管材を製造する方
法及びそのしごき加工に使用する金型に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention produces a pipe material of a predetermined length from a plate material by drawing the plate material, ironing it to make the wall thickness uniform, and adjusting the cross-sectional shape, and then cutting both ends. The present invention relates to a method for ironing and a mold used for the ironing process.
比較゛的短尺な管材を得るには、長尺な管材を所定長さ
に切断することが最も簡単である。しかし、引抜鋼管な
どの長尺な管材は、その製造工程が複雑であり、又、生
産量も板材に比較して著しく少ないために一般的に高価
である。The easiest way to obtain a relatively short tube is to cut a long tube to a predetermined length. However, long pipe materials such as drawn steel pipes are generally expensive because their manufacturing process is complicated and the production volume is significantly lower than that of plate materials.
そこで本願発明者は、板材が比較的安価であることに着
目し、この板材を有底管状に絞り加”工し、その後底部
を切断することにより管材を製造することとした。しか
し絞り加工した有底管の底部を切断しただけでは、絞り
加工において発生する肉ピケ、肉ダマリ現象により肉厚
が均一でないし、また断面形状、例えば真円度にも大き
な誤差を生じるので、このまま製品とすることができな
い。Therefore, the inventor of this application focused on the fact that the plate material is relatively inexpensive, and decided to manufacture the tube material by drawing this plate material into a bottomed tube shape and then cutting the bottom part. If only the bottom of the bottomed tube is cut, the wall thickness will not be uniform due to the phenomenon of flesh pickling and lumps that occur during the drawing process, and there will also be large errors in the cross-sectional shape, such as roundness, so we will continue to manufacture the product as is. I can't.
肉厚を均一化したり、断面形状を整える加工法としては
、しごき加工が周知である。しかし従来のしごき加工は
、所定の大きさ、形状に形成したダイスのベアリング部
内に有底管をパンチによって潜らせるだけであるので、
−回当りのしごき量が極く僅かであって加工効率が悪い
。Ironing is a well-known processing method for making the wall thickness uniform and adjusting the cross-sectional shape. However, in the conventional ironing process, a bottomed tube is simply inserted into the bearing part of a die formed into a predetermined size and shape using a punch.
- The amount of ironing per round is extremely small, resulting in poor processing efficiency.
即ち、−回当りのしごき量を増加すると、素材にかかる
引張応力がパンチの先端に集中し、これにより有底管の
底部が破断してしまうのである。また従来のしごき加工
では、ベアリング部を潜った直後のスプリングバックに
よって製品の寸法精度が不安定である。That is, when the amount of squeezing per stroke is increased, the tensile stress applied to the material concentrates at the tip of the punch, which causes the bottom of the bottomed tube to break. In addition, in conventional ironing, the dimensional accuracy of the product is unstable due to springback immediately after passing through the bearing part.
本発明は上記に鑑み提案されたもので、第１工程では絞
り加工し、第２工程では、パンチの先端周縁部分に素材
を引っ掛けて引張力を分散させる段部を形成し、ダイス
のベアリング面の出口側にはスプリングバック抑制面を
形成した金型によりしごき加工し、第３工程では両端を
切削することにより、製品肉厚の精度及び断面形状が引
抜鋼管に優るとも劣らない管材を板材から製造すること
ができる。しかも効率良く加工することができる管材の
製造方法及びそのしごき金型を提供しようとするもので
ある。The present invention was proposed in view of the above, and in the first step, drawing is performed, and in the second step, the material is hooked to the peripheral edge of the tip of the punch to form a stepped portion that disperses tensile force, and the bearing surface of the die is The exit side of the tube is ironed using a mold with a springback suppressing surface formed, and both ends are cut in the third step. By doing so, a tube material with an accuracy of product wall thickness and a cross-sectional shape comparable to that of a drawn steel tube is made from a sheet material. can be manufactured. Moreover, it is an object of the present invention to provide a method for manufacturing a tube material that can be processed efficiently, and a mold for ironing the same.
以下本発明を実施例の図面にもとづいて説明する。The present invention will be explained below based on drawings of embodiments.
第１工程としては、予め所定の大きさに切断した素材を
絞り加工する。なお素材は、加工により厚さが減少する
ので、製品の肉厚よりも約２０〜３０チ厚い板材、例え
ば製品肉厚が１．６ ｍｍであれば２．０ ｍｍの板材
を切断して使用する。In the first step, a material cut into a predetermined size is drawn. Note that the thickness of the material decreases through processing, so cut a plate approximately 20 to 30 inches thicker than the product's wall thickness, for example, if the product's wall thickness is 1.6 mm, cut a 2.0 mm plate. do.
絞り加工に使用する金型は、従来の金型でもよいが、実
施例では一回当りの絞り量（絞り率）を向上させて効率
良く加工できる金型を使用する。この絞り加工用金型／
は、第１図で示すように、厚板状ホルダ２にパンチ３を
固定状に設けた雄型ダと、パンチ３に嵌合するダイスタ
を厚板状ホルダ乙に固定状に設けた雌型７とから成り、
雄型ダのパンチ３と雌型７のダイスタとを対向させであ
る。The mold used for the drawing process may be a conventional mold, but in this embodiment, a mold that can increase the amount of drawing per stroke (squeezing ratio) and perform processing efficiently is used. This drawing mold/
As shown in Fig. 1, there are two types: a male die in which a punch 3 is fixedly provided on a thick plate-like holder 2, and a female die in which a die star that fits into the punch 3 is fixedly provided on a thick plate-like holder B. It consists of 7,
A male punch 3 and a female die 7 are opposed to each other.
パンチ３は、製品の内面形状に合わせて成形した柱状で
あって、製品の深さよりも十分に長く、基端をホルダユ
の上面に固定しである。そしてこのパンチ３の先端周縁
部分には、先端面の直径を小さくした断面階段状の段部
ｇを形成し、該段部ｇの角を適宜に面取りする。The punch 3 is columnar shaped to match the inner shape of the product, is sufficiently longer than the depth of the product, and has its base end fixed to the upper surface of the holder unit. A stepped portion g with a step-like cross section with a reduced diameter of the tip surface is formed on the peripheral edge of the tip of the punch 3, and the corners of the stepped portion g are appropriately chamfered.
なおこの段部ｇは、素材を段状に成形するためのもので
はなく、素材に喰い込んで引張力を分散させて受けるた
めのものである。図示の実施例では、厚さが２．Ｏｆｆ
１ｍの板材を絞るので、０．５乃至４．ＯＲの面取り加
工を施しである。Note that this stepped portion g is not for forming the material into a stepped shape, but is for biting into the material to disperse and receive tensile force. In the illustrated embodiment, the thickness is 2.5 mm. Off
Since we are squeezing a 1m plate, the thickness is 0.5 to 4. It has an OR chamfered finish.
また第１図中９は、パンチ３の内部に設けた空気抜きの
連通孔であり、パンチ３の先端面に開設した孔／θや段
部ざに開設した孔／／と、パンチ３の基端付近やバンチ
下面に開設した孔／コとを連通させる。Reference numeral 9 in FIG. 1 is a communication hole for air vent provided inside the punch 3, which includes a hole /θ opened at the tip face of the punch 3 and a hole // opened at the stepped portion, and a hole // opened at the proximal end of the punch 3. Communicate with the holes opened nearby and on the underside of the bunch.
上記パンチ３の周囲にはしわ押えプレー） ／３を上下
動可能に設け、該プレート１３から垂設した脚／亭・・
・をクッションプレー）Ｒ上に載せて支持する。このし
わ押えプレート／３は、絞り加工の際に発生し易い製品
のしわを防止するもので、パンチ３の外形よりも僅かに
大きな開口部／３′を有し、該開口部７３′内にパンチ
３を臨ませ、最も上昇したときに上面がパンチ３の先端
面とほぼ同じ高さに位置するようにしである。Around the punch 3, a wrinkle presser/3 is provided so as to be movable up and down, and a leg/tei is hung from the plate 13.
・Put it on cushion play) and support it. This wrinkle suppressing plate /3 prevents wrinkles in the product that are likely to occur during drawing processing, and has an opening /3' slightly larger than the outer shape of the punch 3, and has an opening /3' inside the opening 73'. The punch 3 is faced so that the top surface is located at approximately the same height as the tip end surface of the punch 3 when it is raised the most.
ダイスタは、製品の外形断面形状にほぼ等しい開口部１
６を貫通状に開設したもので、開口部／６の周縁を滑ら
かに丸く成形し、支持部材１７・・・によってホルダ乙
の下面に下向きに固定しである。The diester has an opening 1 approximately equal to the external cross-sectional shape of the product.
6 is opened in a penetrating shape, and the periphery of the opening 6 is formed into a smooth round shape, and is fixed downwardly to the lower surface of the holder B by means of supporting members 17.
そしてこのダイスタの開口部／６内には前記パンチ３の
段部ｇに素材を押圧し得る押え部材／ｇを金型のストロ
ーク方向に沿って移動可能に設けである。図示の実施例
は、製品のノックアウト機能を兼ね備えた押え部材／ｇ
であり、前記パンチ３の段部ｇに嵌合可能な突出部１９
を下面の周縁にダイスタの開口部１６よりも僅かに小さ
くして形成すると共に、該突出部／ｑによって囲まれる
逃げ部〃の深さを製品厚さの約２倍に形成し、上面から
横方向に延出する鍔部２１をダイスタの上面に載せて上
下動可能に支持する。なお押え部材ｌざの下端は、ダイ
スタの下面よりも僅かに高い位置で停止する。またホル
ダ乙の下面と押え部材／どとの間には例えばウレタンゴ
ム、２Ｊなどの弾性体を設け、押え部材／ｇがダイスタ
に対して所定位置まで上昇した後はウレタンゴム２２の
圧縮抵抗により押え部材／ｇの上昇に抵抗力を付けるよ
うにしである。A holding member /g capable of pressing the material against the stepped portion g of the punch 3 is provided in the opening /6 of the die so as to be movable along the stroke direction of the mold. The illustrated embodiment is a presser member/g that also has a product knockout function.
and a protrusion 19 that can fit into the step g of the punch 3.
is formed at the periphery of the lower surface to be slightly smaller than the opening 16 of the die, and the depth of the relief section surrounded by the protrusion/q is approximately twice the thickness of the product. A flange portion 21 extending in the direction is placed on the upper surface of the dicer and supported so as to be movable up and down. Note that the lower end of the presser member 1 stops at a position slightly higher than the lower surface of the dicer. In addition, an elastic body such as urethane rubber, 2J, etc. is provided between the lower surface of the holder A and the presser member 22, and after the presser member G rises to a predetermined position relative to the die, the compressive resistance of the urethane rubber 22 This is to provide resistance to the rise of the holding member/g.
上記した構成からなる金型ｌにより絞り加工を行うには
、先ず第１図工点鎖線で示すように、雌型７を上昇させ
た状態で、素材Ａをしわ押えプレー）／３上に載置する
。この状態で雌型７を下降すると、ダイスタの下面が素
材Ａ上面に当接し、素材Ａをしわ押えプレート／３上に
押え付ける。この状態で雌型７を更に下降すると、第２
図で示すように、′ダイスタが素材Ａの中央部分を残し
て外周部分をしわ押えプレート／３と共に押し下げる。In order to carry out the drawing process using the mold l having the above-mentioned configuration, first, as shown by the dotted chain line in Drawing 1, with the female mold 7 raised, the material A is placed on the wrinkle presser plate)/3. do. When the female mold 7 is lowered in this state, the lower surface of the die comes into contact with the upper surface of the material A and presses the material A onto the wrinkle presser plate/3. When the female mold 7 is further lowered in this state, the second
As shown in the figure, the die star presses down the outer peripheral part of the material A, leaving the center part intact, together with the wrinkle presser plate /3.
しわ押えプレート／３が下降する際にはクッション圧３
の圧力が下降抵抗として作用するので、このクッション
圧により素材Ａの外周部分はダイスタとしわ押えプレー
）／３との間に強く挾まれる。この状態でダイスタを下
降してパンチ３との嵌合深さを増加していくと、ダイス
タの開口部７６周縁が素材Ａをダイスタの開口部１６内
に案内して開口部／Ｌ内周面がパンチ３の周面に押し付
け、ダイスタとパンチ３の嵌合深さに対応して素材Ａを
有底管状に絞ることができる。なおこの状態においては
、押え部材／ｇの突出部／ｑが素材Ａから離れ、或いは
素材Ａに接していても加圧しないので、パンチ３の段部
ｇに素材入を喰い込ませることはなく、このため段部ｇ
の先膜ｇαで素材Ａにかかつている引張力を受ける。Cushion pressure 3 is applied when the wrinkle presser plate/3 is lowered.
Since the pressure acts as a downward resistance, this cushion pressure causes the outer peripheral portion of the material A to be strongly pinched between the diester and the wrinkle presser plate)/3. In this state, when the diester is lowered to increase the depth of engagement with the punch 3, the peripheral edge of the opening 76 of the diester guides the material A into the opening 16 of the diester, and the inner peripheral surface of the opening/L is pressed against the circumferential surface of the punch 3, and the material A can be squeezed into a bottomed tube shape corresponding to the depth of engagement between the diester and the punch 3. In this state, the protruding part /q of the presser member /g is separated from the material A, or even if it is in contact with the material A, no pressure is applied, so the stepped part g of the punch 3 will not bite into the material. , therefore the step g
The tensile force applied to the material A is received by the leading film gα.
この様にして絞り深さの途中、例えば約半分まで絞った
後に、雌型７を更に下降すると、ホルダ６と押え部材／
ｇとの間隔が縮少されるので、ウレタンゴム２２が圧縮
され、この圧縮抵抗力により押え部材／ざが素、材をパ
ンチ３の段部ざに押圧する。押え部材ｌざが素材Ａを押
圧すると、第３図で示すように、先膜ざαと後段ｇｂと
に素材Ａを挟み付けて喰い込ませることができる。した
がってダイスタの更なる下降によって素材Ａにかかる引
張力を、段部ｇの先膜ｇαと後段ｇｂとに分散させて受
けることができ、これにより素材Ａの破断（底抜け）を
有効に防止することができる。また、素材Ａとパンチ−
３との間に溜った空気及び絞り潤滑油をパンチ３先端面
の孔１０や段部ｇの孔／／から連通孔９を介してパンチ
ｇの外部に逃がすことができるので、素材Ａをパンチ３
の先端面や段部ｇに密着させることができる。更に、押
え部材ｉｔの逃げ部〃に溜った空気を空気抜き孔２４１
から逃すことができるので、素材Ａに余分な応力を掛け
ることがない。したがって、上記引張力の分散と相俟っ
て、絞り率を高めることができると共に、肉ヒケ現象等
の不都合を回避することができる。When the female die 7 is further lowered after drawing in the middle of the drawing depth, for example, to about half, the holder 6 and the presser member/
Since the distance between the urethane rubber 22 and the punch 3 is reduced, the urethane rubber 22 is compressed, and this compression resistance force presses the holding member/garment material against the stepped portion of the punch 3. When the presser member l presses the material A, the material A can be sandwiched and bitten between the leading membrane α and the rear gb, as shown in FIG. Therefore, the tensile force applied to the material A due to the further descent of the diester can be distributed and received by the leading film gα of the stepped portion g and the rear film gb, thereby effectively preventing material A from breaking (bottoming out). Can be done. Also, material A and punch
3 can escape to the outside of the punch g from the hole 10 on the tip surface of the punch 3 and the hole in the step g through the communicating hole 9. 3
It can be brought into close contact with the tip surface or step g. Furthermore, the air accumulated in the relief part of the presser member IT is removed through the air vent hole 241.
Since the stress can be released from the stress, no extra stress is applied to the material A. Therefore, together with the above-mentioned dispersion of the tensile force, it is possible to increase the drawing ratio and avoid inconveniences such as the sink mark phenomenon.
雌型７が不死点まで下降して素材Ａを絞り終えると、ｌ
１ｌｉ型７は、絞った製品をダイスタの開口部１６内に
嵌着したまま上昇する。そして上死点の近くまで上昇す
るとラム２夕に設けたノックアウトパー２６がフレーム
側に固定状に設ケであるノックアウトコアによって上昇
を阻止されるので、このノックアウトバームがシャンク
２ｇ内に貫通状に設けであるノックアウトビンλりの上
昇を阻止する。ノックアウトピンユ９は、下端を押え部
材／ｇに当接、又は固定しであるので、この押え部材１
ｇの上昇を阻止することができる。このため、押え部材
／ｇが停止してダイスタだけが上昇することとなり、開
口部／６内に嵌着している製品を押え部材／ざにより押
し出して取り外すこと力戸できる。When the female mold 7 descends to the dead point and finishes squeezing the material A, l
The 1li mold 7 ascends with the squeezed product fitted into the opening 16 of the die. When it rises to near the top dead center, the knockout bar 26 provided on the ram 2g is prevented from rising by the knockout core fixedly installed on the frame side, so this knockout berm penetrates into the shank 2g. This prevents the knockout bin λ from increasing. The knockout pinyu 9 has its lower end in contact with or fixed to the presser member/g, so this presser member 1
It is possible to prevent an increase in g. Therefore, the presser member /g stops and only the dicer rises, and the product fitted in the opening /6 can be pushed out and removed by the presser member /g.
上記の様にして板厚２．０ ｍｍの鉄板を絞った場合、
従来は絞り率５５〜６０％であったが、この絞り率を約
１０％向上しても７素材が破断することはない。When a steel plate with a thickness of 2.0 mm is squeezed as described above,
Conventionally, the drawing ratio was 55 to 60%, but even if this drawing ratio was increased by about 10%, the 7 materials would not break.
したがって厚板を効率良く絞り加工することができる。Therefore, thick plates can be efficiently drawn.
また肉ヒケ、肉ダマリに関して、従来の金型では±０．
２５〜０．３０ ｍｍであったが、これを±０．１〜０
゜２ｍｍに抑えることができる。しかし、底部付近の肉
厚と開口端付近の肉厚とに差があっては、そのまま製品
にすることはできない。In addition, regarding meat sink marks and meat lumps, conventional molds have ±0.
25 to 0.30 mm, but this was changed to ±0.1 to 0.
It can be suppressed to 2 mm. However, if there is a difference between the wall thickness near the bottom and the wall thickness near the open end, it cannot be used as a product as is.
そこで第２工程では、肉厚を均一化すると共に、断面形
状を整えるためにしごき加工を行う。Therefore, in the second step, ironing is performed to make the wall thickness uniform and to adjust the cross-sectional shape.
このしごき加工に使用する金型３０は、第４図で示すよ
うに、厚板状ホルダ３１にパンチ３２を固定状に設けた
雄型３３と、上記パンチ３コに嵌合するダイス３グを厚
板状ホルダ３夕に固定状に設け、ダイス３ｔＩ上面には
ガイドプレート３乙を取付けた雌型３７とから成り、雄
型３３のパンチ３．２と雌型３７のダイス３１とを対向
させである。As shown in FIG. 4, the mold 30 used for this ironing process includes a male mold 33 in which a punch 32 is fixedly provided on a thick plate-like holder 31, and 3 dies that fit into the 3 punches. It consists of a female die 37 fixedly provided on a thick plate-shaped holder 3 and a guide plate 3 attached to the upper surface of the die 3tI, with the punch 3.2 of the male die 33 and the die 31 of the female die 37 facing each other. It is.
パンチ３コは、製品の内面形状に合わせて、例えば真円
に高精度に成形した柱状であって、長さが製品の深さの
２倍以上であり、基端をホルダ３／の下面に固定しであ
る。そしてこのパンチ３２には、第５図で示すように、
先端から長さの途中まで、例えば製品の深さの約半分の
長さまでの間、径にして０．０５〜０．１Ｍ程度の僅か
な先細のテーパ一部３ｇを形成すると共に、先端の周縁
部分には、先端面の１直径を小さくした段ｓ３ｑを形成
し、該段部３ｑの各穴を適宜に面取りする。The punch 3 has a columnar shape that is highly precisely formed into a perfect circle according to the inner shape of the product, the length is more than twice the depth of the product, and the base end is attached to the bottom surface of the holder 3/. It is fixed. As shown in FIG. 5, this punch 32 includes:
A slight tapered part 3g with a diameter of about 0.05 to 0.1M is formed from the tip to the middle of the length, for example, to about half the depth of the product, and the periphery of the tip In the portion, a step s3q is formed by reducing the diameter of the tip end surface by one diameter, and each hole of the step portion 3q is chamfered appropriately.
上記テーパ一部３ｇは、素材である有底管Ｂの底部付近
の肉厚が絞り加工における肉ピケ現象により他の部分よ
りも薄くなっており、この部分のしごき量（圧縮力）を
他よりも少なくして全体として肉厚が均一になるように
調整するためのものである。また上記段部３９は、素材
Ｂに喰い込んで該素材Ｂを引張り、この時素材Ｂにかか
る引張力を分散させて受けるためのものであり、図示の
実施例では厚さが約２．０闘の素材をしごくので、０．
５乃至３．ＯＲの面取り加工を各穴に施しである。なお
第４〜７図中ｙｏは、パンチ３２の内部に設けた空気抜
きの連通孔であり、パンチ３コの先端面、段部３ｑ及び
上側面に開口する。The above taper part 3g has a wall thickness near the bottom of the bottomed tube B that is the material, which is thinner than other parts due to the flesh pickling phenomenon during drawing, and the amount of squeezing (compressive force) in this part is lower than the other parts. This is to adjust the thickness to be uniform as a whole. Further, the stepped portion 39 bites into the material B and pulls the material B, and is used to disperse and receive the tensile force applied to the material B at this time, and in the illustrated embodiment, the thickness is approximately 2.0 mm. 0.
5 to 3. OR chamfering is applied to each hole. Note that yo in FIGS. 4 to 7 is an air vent communication hole provided inside the punch 32, and opens at the tip surface, step portion 3q, and upper surface of the punch 3.
ガイドプレート３６は、有底管状の素材Ｂの位置決めを
行うもので、素材Ｂが楽に入り込む大きさで、深さが製
品高さの半分以上の貫通孔侵を有する。そしてダイス３
ｑ上面との間には貫通孔弘／内面とガイドブレート３６
の側面とを連通ずる空気抜き孔４１２′を形成しである
。The guide plate 36 is for positioning the bottomed tubular material B, and has a through-hole that is large enough for the material B to easily enter and has a depth of more than half the product height. and dice 3
q There is a through hole between the top surface/inner surface and the guide plate 36.
An air vent hole 412' is formed to communicate with the side surface.
ダイス３グは、上記ガイドプレート３６の貫通孔ｌＩ／
とホルダ３夕の貫通孔３り′とを一直線に連通ずる開口
部ｌＩコを有し、該開口部侵の上方入口側には内径を縮
少したベアリング部グ３を形成すると共に、該ベアリン
グ部ダ３の下方出口側にはスプリングバック抑制面ｐｐ
を形成しである。ベアリング部Ｕは、６〜１６度傾斜し
た案内面ダタと、該案内面ダ５の下端に連結し、形状を
製品の外面断面形状、例えば真円の製品であればその外
径に等しい真円に成形したベアリング面ダＬとからなる
。The die 3 is inserted into the through hole lI/ of the guide plate 36.
and a through hole 3' of the holder 3 are formed in a straight line, and a bearing portion 3 with a reduced inner diameter is formed on the upper entrance side of the opening. There is a springback suppressing surface pp on the lower exit side of the parter 3.
It is formed. The bearing part U is connected to the guide surface data inclined at 6 to 16 degrees and the lower end of the guide surface data 5. It consists of a bearing surface L formed into a shape.
なおベアリング面ダ６は、上下幅を１．５〜４．０ ｍ
ｍにすることが望ましい。またスプリングバック抑制面
ダダは、内径がベアリング面≠６の内径よりもレートな
面であり、製品の長さの１００〜１３０ ％程度の十分
な上下長さを有する。The bearing surface 6 has a vertical width of 1.5 to 4.0 m.
It is desirable to set it to m. Further, the springback suppressing surface Dada is a surface whose inner diameter is larger than the inner diameter of the bearing surface≠6, and has a sufficient vertical length of about 100 to 130% of the length of the product.
そして上記ダイス３１Ｉとホルダ３夕との間には先端面
が傾斜し、スプリングダ７により付勢した爪何・・・を
放射方向に移動可能に例えば３箇所設け、この爪１ＩＩ
ｒ−・・の先端をホルダ３夕の貫通孔３り′内に臨ませ
る。Between the die 31I and the holder 3, there are provided, for example, three claws whose distal end surfaces are inclined and which are biased by the springer 7 so as to be movable in the radial direction.
The tip of r-... is exposed to the through hole 3' of the holder 3.
上記した構成からなる金型３０によりしごき加工を行う
には、先ず第４図で示すように、雄型３３を上昇させた
状態で素材Ｂをガイドプレート３６の貫通孔４１１内に
底部を下にした状態で供給する。この状態で雄型３３を
下降すると、第５図で示すように、パンチ３２が素材Ｂ
内に嵌入し、パンチ３コの先端面が素材Ｂの底部に当接
する。なお素ｉｎ内の空気及び潤滑油は、連通孔ａＯ内
を通って外部に排出される。To perform ironing using the mold 30 having the above-described configuration, first, as shown in FIG. Supplied as is. When the male die 33 is lowered in this state, the punch 32 is inserted into the material B as shown in FIG.
The tip of the three punches comes into contact with the bottom of the material B. Note that the air and lubricating oil in the main in are discharged to the outside through the communication hole aO.
上記した状態で雄型３３を更に下降すると、第６図で示
すように、パンチ３２が素材Ｂを嵌着したままダイス３
グの開口部Ｑ内に入り込み、素材Ｂがベアリング部ダ３
内に入ると、素材Ｂの側面肉厚よりも、パンチ３．２外
面とベアリング面弘６との間隙の方が小さいので、素材
Ｂの側面部分はベアリング面グ乙によりしごかれて、素
材Ｂの内面がパンチ３ユの外面に密着すると共に、強力
な圧縮力と引張力とを同時に受けて上記間隙と同じ肉厚
に引き伸ばされる。したがってベアリング部り３を潜っ
た素材Ｂは、側面部分の肉厚が上記間隙と同じ厚さに均
一化されると同時に断面形状が整えられ、また上下高さ
が伸ばされる。When the male die 33 is further lowered in the above state, as shown in FIG.
The material B enters into the opening Q of the bearing part 3.
Once inside, the gap between the outer surface of the punch 3.2 and the bearing surface 6 is smaller than the side wall thickness of the material B, so the side surface of the material B is squeezed by the bearing surface The inner surface of B is in close contact with the outer surface of the punch 3, and is simultaneously subjected to strong compressive force and tensile force, and is stretched to the same thickness as the gap. Therefore, the material B that has passed through the bearing part 3 has a uniform wall thickness at the side surface to the same thickness as the gap, and at the same time its cross-sectional shape is adjusted and its vertical height is increased.
なおパンチ３２の先端部分には上記したテーパ一部３ｇ
を形成しであるので、素材Ｂの底部付近のしごき量は他
の部分に較べて少ない。したがって肉ヒケした底部付近
を余分にしごくことがなく、底部付近から開口端付近ま
での肉厚を高精度に均一化することができる。Note that the tip of the punch 32 has the above-mentioned taper part 3g.
Therefore, the amount of squeezing near the bottom of the material B is smaller than in other parts. Therefore, the area near the bottom where the wall has sunk is not squeezed out excessively, and the wall thickness from the area near the bottom to the area near the opening end can be made uniform with high precision.
またパンチ３コの先端周縁部分には段部３９を形成しで
あるので、素材Ｂ側面がベアリング部ｌＩ３によってし
ごかれると、上記段部３９が・素材Ｂの内面に喰い込み
、素材Ｂにかかる引張力をこの段部３９で分散して受け
ることができる。したがって従来のしごき金型よりもし
ごき量を増加し、これにより素材Ｂに強力な引張力が作
用したとしても、このす１張力を分散させることにより
素材Ｂの底抜けを防止することができる。このため、従
来のしごき加工よりも加工効率を著しく向上させること
ができる。In addition, a step 39 is formed on the peripheral edge of the tip of the three punches, so when the side surface of the material B is squeezed by the bearing section lI3, the step 39 bites into the inner surface of the material B, and the material B This tensile force can be dispersedly received by the stepped portion 39. Therefore, even if the amount of ironing is increased compared to the conventional ironing mold and a strong tensile force is applied to the material B, the material B can be prevented from bottoming out by dispersing this tensile force. Therefore, processing efficiency can be significantly improved compared to conventional ironing processing.
更に、ベアリング部ｌＩ３によってしごがれた素材Ｂは
、製品高さよりも十分に長く、ベアリング面部の内径よ
りも極く僅がだけ大径なスプリングバック抑制面１ＩＩ
Ｉによって暫くの間包囲されるので、素材Ｂがスプリン
グバックにより復元することを有効に抑制することがで
きる。したがって、従来のしごき金型を使用したしごき
加工に較べて、加工精度を安定させることができる。Furthermore, the material B squeezed by the bearing part lI3 is formed into a springback suppressing surface 1II which is sufficiently longer than the product height and whose diameter is only slightly larger than the inner diameter of the bearing surface part.
Since the material B is surrounded by I for a while, it is possible to effectively prevent the material B from recovering due to springback. Therefore, processing accuracy can be stabilized compared to ironing using a conventional ironing die.
パンチ３λが更に下降し、素材Ｂの底部がダイス３Ｑの
下面から突出すると、素材Ｂ外面が爪ｑｇを後退させる
。そしてパンチ３コが更に下降して素材Ｂの開口端が爪
何の先端面を通過すると、第７図で示すように、爪ダざ
・・・がスプリング特・・・の付勢により前進し、パン
チ３２の外面に当接する。この状態でパンチ３．２が上
昇すると、爪ｐｇ・・・が素材Ｂの上昇を阻止するので
、該素材Ｂをパンチ３２から抜き落とすことができる。When the punch 3λ further descends and the bottom of the material B protrudes from the lower surface of the die 3Q, the outer surface of the material B causes the claw qg to retreat. When the three punches descend further and the open end of material B passes the tip of the claw, the claw moves forward due to the bias of the spring, as shown in Figure 7. , abuts against the outer surface of the punch 32. When the punch 3.2 rises in this state, the claws pg... prevent the material B from rising, so that the material B can be pulled out from the punch 32.
なお上記しごき金型３０は、パンチ３２先端に素材の内
面に喰い込む段部を有するので、底部の無い管材であっ
てもしごき加工することができる。The ironing die 30 has a stepped portion at the tip of the punch 32 that bites into the inner surface of the material, so that even a tube material without a bottom can be ironed.
上記した第２工程により肉厚を均一化すると共に、断面
形状を整えた後は、第３工程により有底管の両端を切削
して開口端を整形、例えば １面取り加工すると共に、
底部を切り落す。そしてこの切断加工により所定長さに
揃えると共に、パンチ３ユの段部３９の痕跡を取り除く
。なお上記切削加工は、例えば旋盤など周知手段により
行うことができる。After making the wall thickness uniform and adjusting the cross-sectional shape in the above-mentioned second step, in the third step, both ends of the bottomed tube are cut to shape the open end, for example, one chamfer is processed, and
Cut off the bottom. Then, by this cutting process, it is made uniform to a predetermined length, and traces of the stepped portion 39 of the punch 3 are removed. Note that the above-mentioned cutting process can be performed by known means such as a lathe.
以上説明したように本発明によれば、パンチの先端周縁
部分に素材を引っ掛けて引張力を分散させる段部を形成
し、ダイスのベアリング面の出口側にはスプリングバッ
ク抑制面を形成した金型によりしごき加工するので、板
材を使用して肉厚が均一であって断面形状の整った良質
な管材を簡単に製品化することができる。また本発明よ
り製造した管材は、継目が無いので強度が高く、シかも
、しごき加工により外面が鏡面となり、見栄えがするし
、錆び難い。As explained above, according to the present invention, a step is formed on the peripheral edge of the tip of the punch to catch the material and disperse the tensile force, and a mold is formed with a springback suppressing surface on the outlet side of the bearing surface of the die. Since ironing is used, it is possible to easily produce high-quality pipe materials with uniform wall thickness and a uniform cross-sectional shape using plate materials. In addition, the pipe material manufactured according to the present invention has high strength because there is no seam, and the outer surface becomes a mirror surface by ironing, giving it an attractive appearance and being resistant to rust.
更に本発明は、殆んどの工程がプレス加工であるため、
大量生産が極めて容易であり、また材料費が安くて済む
ので、良質の管材を効率良く、シかも安価に製造するこ
とができる。Furthermore, since most of the processes in the present invention are press working,
Since mass production is extremely easy and material costs are low, high-quality pipe materials can be manufactured efficiently and at low cost.
図面は本発明の実施例を示すもので、第１図は絞り加工
用金型の断面図、第２図及び第３図は絞り工程を示す断
面図、第４図はしごき加工用金型の断面図、第５図及び
第６図はしごき工程の断面図、第７図はしごき加工が終
了した状態の断面図である。
３０・・・しごき加工用金型、３２・・・パンチ、評・
・・ダイス、３ｑ・・・段部、件・・・スプリングバッ
ク抑制面、ｌ６・・・ベアリング面。
特許出願人 株式会社梅舘製作所
同 代理人 弁理士 描 出 賢 巳、。
第２図
第３図
第６図
第６図
第４図 ＝ １
第７囚The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view of a drawing die, FIGS. 2 and 3 are sectional views showing the drawing process, and FIG. 4 is a sectional view of a drawing die. 5 and 6 are cross-sectional views of the laddering process, and FIG. 7 is a cross-sectional view of the state where the laddering process has been completed. 30...Mold for ironing process, 32...Punch, evaluation
...Dice, 3q...Step part, Matter...Springback suppression surface, l6...Bearing surface. Patent applicant: Umedate Seisakusho Co., Ltd. Agent: Kenmi Umeda, patent attorney. Figure 2 Figure 3 Figure 6 Figure 6 Figure 4 = 1 Prisoner 7
Claims (2)
さに切断した素材を絞り加工する第１工程と、 外径が製品の内径にほぼ等しいパンチの先端周縁部分に
素材を引っ掛ける段部を形成し、ダイスのベアリング面
の内径を製品の外径にほぼ等しく形成し、このベアリン
グ面の出口側にはベアリング面の内径よりも極く僅かだ
け大径で、製品の長さよりも長尺なスプリングバック抑
制面を形成した金型によってしごき加工し、素材の肉厚
を均一化すると共に断面形状を整える第２工程と、 両端を切削して近定長さの管材にする第３工程とから成
る板材から管材を製造する方法。(1) The first step is to draw a sheet material that is slightly thicker than the thickness of the product and cut it into a predetermined size, and the stage in which the material is hooked to the edge of the tip of a punch whose outer diameter is approximately equal to the inner diameter of the product. The inner diameter of the bearing surface of the die is formed to be approximately equal to the outer diameter of the product, and the outlet side of this bearing surface has a diameter slightly larger than the inner diameter of the bearing surface and a length longer than the length of the product. The second step is ironing using a mold with a long springback suppression surface to make the thickness of the material uniform and the cross-sectional shape, and the third step is to cut both ends to make a pipe of approximately certain length. A method of manufacturing pipe material from plate material consisting of.
共に、該パンチの先端周縁部には素材をジ１つ掛けて素
材にかかる引張力を分散させる段５部を形成し、ダイス
のベアリング面の内径を製品の外径とほぼ等しくすると
共に、該ベアリング面の出口側にはベアリング面の内径
よりも極く僅かだけ大径で、製品の長さよりも長尺なス
プリングバック抑制面を形成したことを特徴とするしご
き加工用金型。(2) The outer diameter of the punch is made almost equal to the inner diameter of the product, and a die is hung around the tip of the punch to form a step 5 part that disperses the tensile force applied to the material. The inner diameter of the surface is made almost equal to the outer diameter of the product, and a springback suppressing surface is formed on the outlet side of the bearing surface, which has a slightly larger diameter than the inner diameter of the bearing surface and is longer than the length of the product. A mold for ironing processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58120276A JPS6012227A (en) | 1983-07-04 | 1983-07-04 | Method for producing pipe material from plate material and die for ironing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58120276A JPS6012227A (en) | 1983-07-04 | 1983-07-04 | Method for producing pipe material from plate material and die for ironing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6012227A true JPS6012227A (en) | 1985-01-22 |
Family
ID=14782223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58120276A Pending JPS6012227A (en) | 1983-07-04 | 1983-07-04 | Method for producing pipe material from plate material and die for ironing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6012227A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006061968A (en) * | 2004-08-30 | 2006-03-09 | Showa Aluminum Kan Kk | Di can manufacturing method, and di can manufactured by the method |
| CN101767154A (en) * | 2010-03-26 | 2010-07-07 | 北京三兴汽车有限公司 | Stepped cylindrical component die for medium plate |
| CN113020431A (en) * | 2021-02-08 | 2021-06-25 | 衢州众德精密机械有限公司 | Stretching male die and bottom hole punching stripping block integrated forming die |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49135876A (en) * | 1972-11-16 | 1974-12-27 | ||
| JPS56142146A (en) * | 1980-03-13 | 1981-11-06 | Setsukusuton Kiyan Co Inc | Vessel in metal and its manufacture |
-
1983
- 1983-07-04 JP JP58120276A patent/JPS6012227A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49135876A (en) * | 1972-11-16 | 1974-12-27 | ||
| JPS56142146A (en) * | 1980-03-13 | 1981-11-06 | Setsukusuton Kiyan Co Inc | Vessel in metal and its manufacture |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006061968A (en) * | 2004-08-30 | 2006-03-09 | Showa Aluminum Kan Kk | Di can manufacturing method, and di can manufactured by the method |
| CN101767154A (en) * | 2010-03-26 | 2010-07-07 | 北京三兴汽车有限公司 | Stepped cylindrical component die for medium plate |
| CN113020431A (en) * | 2021-02-08 | 2021-06-25 | 衢州众德精密机械有限公司 | Stretching male die and bottom hole punching stripping block integrated forming die |
| CN113020431B (en) * | 2021-02-08 | 2024-01-23 | 东莞海雅特汽车科技有限公司 | Integrated forming die for drawing male die and bottom hole punching and material removing block |
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