JPH07299520A - Method for manufacturing cylindrical parts and device therefor - Google Patents
Method for manufacturing cylindrical parts and device thereforInfo
- Publication number
- JPH07299520A JPH07299520A JP9435594A JP9435594A JPH07299520A JP H07299520 A JPH07299520 A JP H07299520A JP 9435594 A JP9435594 A JP 9435594A JP 9435594 A JP9435594 A JP 9435594A JP H07299520 A JPH07299520 A JP H07299520A
- Authority
- JP
- Japan
- Prior art keywords
- flat plate
- plate material
- molding die
- core metal
- mold
- 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
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、平板素材をプレス加工
で丸めて略円筒形状の円筒部品を製造する方法および装
置に係り、特に、少ない工程数，単一のプレス設備で寸
法精度の高い円筒部品を製造する方法および装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a substantially cylindrical cylindrical part by rolling a flat plate material by press working, and particularly, the number of steps is small and the dimensional accuracy is high with a single pressing facility. The present invention relates to a method and an apparatus for manufacturing a cylindrical part.
【０００２】[0002]
【従来の技術】平板素材を略円筒形状に丸める方法とし
て、プレス加工が広く用いられている。図９は、かかる
プレス加工による丸め加工方法の手順を説明する図で、
先ず（ａ）でダイス型１００およびポンチ型１０２によ
り平板素材１０４の端部を曲げ加工した後、（ｂ）でダ
イス型１０６およびポンチ型１０８により中央部分を曲
げ加工して略Ｕ字形状の中間品１１０を製造し、（ｃ）
で一対のダイス型１１２，１１４により外周側から押圧
して丸めることにより目的とする円筒部品１１６が得ら
れる。（ｃ）の工程のダイス型１１２としては、（ｂ）
の工程のダイス型１０６をそのまま用いることも可能で
ある。なお、多段ローラによる丸め加工方法も知られて
いるが、平板素材の板厚が厚い場合や目的とする円筒部
品の径寸法が小さい場合は適用が困難である。2. Description of the Related Art Pressing is widely used as a method for rolling a flat plate material into a substantially cylindrical shape. FIG. 9 is a diagram for explaining the procedure of the rounding method by such press working,
First, in (a), the end portion of the flat plate material 104 is bent by the die die 100 and the punch die 102, and then the central portion is bent by the die die 106 and the punch die 108 in FIG. Product 110, (c)
Then, the target cylindrical part 116 is obtained by pressing and rolling from the outer peripheral side by the pair of die dies 112 and 114. The die mold 112 used in the step (c) includes (b)
It is also possible to use the die mold 106 used in the step (3) as it is. Although a rounding method using a multi-stage roller is also known, it is difficult to apply it when the plate material has a large plate thickness or when the diameter of the intended cylindrical part is small.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、かかる
従来のプレス加工による丸め方法においては、端部曲
げ，Ｕ字曲げを行った後に最終的な丸め加工を行うこと
になるため、工程数が多いとともに各工程毎に異なるプ
レス設備が必要で、製造時間や製造コストの点で必ずし
も充分に満足できるものではなかった。前記図９の
（ｃ）の工程でダイス型１０６を用いる場合でも、ポン
チ型１０８とダイス型１１４とを切り換えるなどの設備
が必要となる。また、各プレス設備毎の精度のばらつき
や素材の位置決め誤差などの積み重ねで寸法精度のばら
つきが大きくなり、高い寸法精度を確保することが困難
であった。更に、最終の丸め工程では外周側から素材を
押圧するだけであるため、この点でも充分な寸法精度が
得られ難いとともに、素材端部に充分な曲げ加工を施す
ことができず、図１０に示すように正規の円筒形状から
突き出す突出寸法ｔが比較的大きくなり、芯金などを用
いて修正する修正工程が必要である。However, in such a conventional rounding method by press working, since the final rounding is performed after the end bending and the U-shaped bending, the number of steps is large. Different press equipment was required for each process, and it was not always satisfactory in terms of manufacturing time and manufacturing cost. Even when the die 106 is used in the step of FIG. 9C, equipment such as switching between the punch 108 and the die 114 is required. Further, the dimensional accuracy varies due to the accumulation of accuracy variations among the press equipments and the positioning error of the material, and it has been difficult to secure high dimensional accuracy. Furthermore, in the final rounding process, since the material is only pressed from the outer peripheral side, it is difficult to obtain sufficient dimensional accuracy in this respect as well, and it is not possible to perform sufficient bending processing on the material end portion. As shown in the drawing, the protruding dimension t protruding from the regular cylindrical shape becomes relatively large, and a correction process for correcting with a core metal or the like is required.
【０００４】本発明は以上の事情を背景として為された
もので、その目的とするところは、少ない工程数，プレ
ス設備で寸法精度の高い円筒部品を製造できるようにす
ることにある。The present invention has been made in view of the above circumstances, and an object thereof is to make it possible to manufacture a cylindrical part having high dimensional accuracy with a small number of steps and press equipment.
【０００５】[0005]
【課題を解決するための第１の手段】かかる目的を達成
するために、第１発明は、平板素材をプレス加工で丸め
て略円筒形状の円筒部品を製造する方法であって、
（ａ）略半円筒形状の凹形成形面を有する第１成形型と
略円筒形状の外周成形面を有する芯金との間で前記平板
素材を挟圧することにより、その平板素材を曲げ加工し
て略Ｕ字形状の中間品を得るＵ字曲げ工程と、（ｂ）そ
の中間品を前記第１成形型と芯金との間で挟圧したま
ま、略半円筒形状の凹形成形面を有する第２成形型を第
１成形型と反対側から相対的に芯金に接近させ、その中
間品の両端部を第２成形型と芯金との間で挟圧して曲げ
加工する端部曲げ工程とを含むことを特徴とする。In order to achieve the above object, the first invention is a method for manufacturing a cylindrical part having a substantially cylindrical shape by rolling a flat plate material by press working.
(A) The flat plate material is bent by pressing the flat plate material between a first molding die having a substantially semi-cylindrical concave forming surface and a core metal having a substantially cylindrical outer peripheral molding surface. U-shaped bending step for obtaining a substantially U-shaped intermediate product, and (b) the intermediate product is clamped between the first molding die and the core metal while a semi-cylindrical concave forming surface is formed. End bending in which the second molding die having the second molding die is brought closer to the core metal from the side opposite to the first molding die, and both ends of the intermediate product are clamped and bent between the second molding die and the core metal. And a process.
【０００６】[0006]
【作用および第１発明の効果】すなわち、第１成形型と
芯金との間で平板素材を挟圧して略Ｕ字形状の中間品を
得た後、第１成形型と反対側から第２成形型を相対的に
接近させて、その第２成形型と芯金との間で中間品の両
端部を挟圧して曲げ加工することにより、円筒形状に丸
めるのである。第１成形型，第２成形型，および芯金の
移動態様としては、第２成形型を位置固定に配置すると
ともに芯金を第２成形型に対して接近離間可能に配置
し、第１成形型を芯金に接近させて平板素材にＵ字曲げ
を行った後、そのまま第１成形型を芯金と共に第２成形
型に接近させて端部曲げを行うようにしても良いが、芯
金を位置固定に配置して第１成形型および第２成形型を
それぞれ互いに反対側から芯金に接近させるようにする
ことも可能である。略Ｕ字形状の中間品は、両端部が略
平行か或いは次第に拡開するように延び出しているた
め、その両端部を丸める第２成形型には、その両端部が
確実に凹形成形面に沿って内側へ曲げられるように案内
するガイド面を設けることが望ましい。また、このよう
にして製造する円筒部品は必ずしも真円である必要はな
く、楕円など多少変形した円筒形状であっても良く、上
記第１成形型，第２成形型，および芯金の各成形面はそ
の円筒形状に応じて設計される。In other words, the flat plate material is pressed between the first molding die and the core metal to obtain a substantially U-shaped intermediate product, and then the second molding is performed from the side opposite to the first molding die. By making the forming dies relatively close to each other and pressing both end portions of the intermediate product between the second forming die and the core metal to perform bending, the dies are rounded into a cylindrical shape. As a moving mode of the first molding die, the second molding die, and the core metal, the second molding die is arranged in a fixed position and the core metal is arranged so as to be able to approach and separate from the second molding die. The mold may be brought close to the core metal to bend the flat plate material into a U shape, and then the first molding die may be made to approach the second molding die together with the core metal to bend the end portion. It is also possible to fix the first mold and the second mold so that they approach the core metal from opposite sides. Since the intermediate U-shaped intermediate product has both ends extending substantially parallel or gradually expanding, the second mold for rounding the both ends surely forms the concave forming surface on both ends. It is desirable to provide a guide surface that guides to bend inward along. Further, the cylindrical part manufactured in this manner does not necessarily have to be a perfect circle, and may have a slightly deformed cylindrical shape such as an ellipse. Each of the first molding die, the second molding die, and the core metal is molded. The surface is designed according to its cylindrical shape.
【０００７】ここで、かかる本発明の円筒部品の製造方
法は、第１成形型と芯金との間で平板素材を挟圧してＵ
字曲げを行った後、そのまま第２成形型と芯金との間で
中間品の端部を挟圧して端部曲げを行うようにしている
ため、工程数やプレス設備が少なくなって製造時間，製
造コストを低減できる。また、第１成形型，第２成形
型，および芯金を備えた単一のプレス設備で加工できる
ため、従来のようにプレス設備毎の精度のばらつきや素
材の位置決め誤差などの積み重ねによる寸法誤差の拡大
が回避される一方、第１成形型および第２成形型と芯金
との間で挟圧して曲げ加工を行うため、平板素材の中央
部分は勿論、端部まで高い精度で曲げ加工が施されるよ
うになり、高い寸法精度が得られるようになる。端部ま
で確実に曲げ加工が施されることから、前記突出寸法ｔ
（図１０参照）を小さくでき、その修正が不要となる。Here, in the method for manufacturing a cylindrical part according to the present invention, the flat plate material is clamped between the first molding die and the core metal so that U is pressed.
After the bending is performed, the end of the intermediate product is clamped between the second molding die and the core to bend the end, so the number of steps and the press equipment are reduced and the manufacturing time is reduced. The manufacturing cost can be reduced. In addition, since it can be processed with a single press equipment equipped with the first molding die, the second molding die, and the core metal, dimensional errors due to stacking such as accuracy variations and material positioning errors as in the past However, since bending is performed by sandwiching the pressure between the first and second molding dies and the core metal, bending work can be performed with high accuracy not only in the central portion of the flat plate material but also in the end portion. As a result, high dimensional accuracy can be obtained. Since the bending work is surely performed up to the end, the protrusion dimension t
(See FIG. 10) can be made small, and its correction is unnecessary.
【０００８】[0008]
【課題を解決するための第２の手段】第２発明は、上記
第１発明の製造方法を好適に実施できる製造装置に関す
るもので、平板素材をプレス加工で丸めて略円筒形状の
円筒部品を製造する装置であって、（ａ）それぞれ略半
円筒形状の凹形成形面を有するとともに互いに対向して
配設される一対の第１成形型および第２成形型と、
（ｂ）位置固定に配設された前記第２成形型に対して前
記第１成形型を接近離間駆動する駆動手段と、（ｃ）前
記第１成形型が前記第２成形型から離間する初期位置に
保持された状態において、その第１成形型と第２成形型
との間の中間位置に保持される略円筒形状の外周成形面
を有する芯金と、（ｄ）前記第１成形型が前記第２成形
型に接近させられる際に、その第１成形型と前記芯金と
の間で前記平板素材が曲げ加工されるように、芯金付勢
手段の付勢力に従ってその芯金を前記中間位置に保持す
る一方、前記第１成形型が更に前記第２成形型に接近さ
せられると、前記付勢力に抗して前記芯金が第１成形型
と共に第２成形型に接近することを許容する芯金保持手
段とを有することを特徴とする。A second aspect of the present invention relates to a production apparatus capable of suitably implementing the production method of the first aspect of the present invention, in which a flat plate material is rolled by press working to form a substantially cylindrical cylindrical part. An apparatus for manufacturing, comprising: (a) a pair of a first molding die and a second molding die, each having a substantially semi-cylindrical concave forming surface and arranged to face each other;
(B) driving means for driving the first molding die toward and away from the second molding die fixedly positioned; (c) initial stage where the first molding die separates from the second molding die. A core metal having a substantially cylindrical outer peripheral molding surface which is retained at an intermediate position between the first molding die and the second molding die in a state of being held at the position; and (d) the first molding die According to the urging force of the core bar urging means, the core bar is moved so that the flat plate material is bent between the first mold and the core bar when the core bar is moved toward the second mold. When the first molding die is further brought closer to the second molding die while being held at the intermediate position, the core metal is prevented from approaching the second molding die together with the first molding die against the biasing force. It is characterized by having a core bar holding means which allows it.
【０００９】[0009]
【作用】このような円筒部品の製造装置においては、駆
動手段によって第１成形型が初期位置に保持されるとと
もに、芯金保持手段によって芯金が中間位置に保持され
た状態において、それ等の第１成形型と芯金との間に自
動若しくは手作業で平板素材を供給する。そして、その
状態で駆動手段により第１成形型が第２成形型に向かっ
て接近させられると、先ず、その第１成形型と芯金との
間で平板素材が挟圧され、中央部分が曲げ加工されて略
Ｕ字形状の中間品が得られる。芯金は芯金保持手段の芯
金付勢手段によって中間位置に保持されており、芯金の
外周成形面および第１成形型の凹形成形面に倣って平板
素材が完全に曲げ加工されると、以後は芯金付勢手段の
付勢力に抗して第１成形型と共に第２成形型に向かって
接近させられる。略Ｕ字形状の中間品は第１成形型と芯
金との間で挟圧されたまま第２成形型に接近させられ、
両端部が第２成形型の凹形成形面に係合させられるよう
になると、その両端部は凹形成形面に沿って内側へ曲げ
られ、その芯金と第２成形型との間で挟圧されることに
より円筒形状に曲げ加工される。In such a cylindrical part manufacturing apparatus, the first mold is held at the initial position by the drive means and the core metal is held at the intermediate position by the core holding means. A flat plate material is automatically or manually supplied between the first molding die and the core metal. Then, when the first molding die is made to approach the second molding die by the driving means in that state, first, the flat plate material is clamped between the first molding die and the core metal, and the central portion is bent. By processing, a substantially U-shaped intermediate product is obtained. The cored bar is held at an intermediate position by the cored bar urging means of the cored bar holding means, and the flat plate material is completely bent along the outer peripheral molding surface of the cored bar and the concave forming surface of the first molding die. Then, thereafter, it is made to approach the second molding die together with the first molding die against the urging force of the core metal urging means. The substantially U-shaped intermediate product is brought close to the second molding die while being clamped between the first molding die and the core metal,
When both ends are brought into engagement with the concave forming surface of the second molding die, both ends thereof are bent inward along the concave forming surface and sandwiched between the core metal and the second molding die. When pressed, it is bent into a cylindrical shape.
【００１０】[0010]
【第２発明の効果】このように、第２発明の円筒部品の
製造装置においても、第１成形型と芯金との間で平板素
材が略Ｕ字形状に曲げられ、そのまま第２成形型と芯金
との間で両端部が曲げ加工されるため、工程数やプレス
設備が少なくなって製造時間，製造コストを低減できる
とともに高い寸法精度が得られるようになるなど、前記
第１発明と同様の効果が得られる。加えて、この製造装
置においては、駆動手段により第１成形型を第２成形型
に対して接近離間駆動するだけで丸め加工できるため、
例えば第１成形型および第２成形型をそれぞれ芯金に対
して接近離間駆動する場合に比較して、装置が簡単且つ
安価に構成されるとともに高能率で円筒部品を製造でき
る。As described above, also in the apparatus for manufacturing a cylindrical part of the second invention, the flat plate material is bent into a substantially U-shape between the first molding die and the core metal, and the second molding die as it is. Since both ends are bent between the core metal and the core metal, the number of steps and the press equipment are reduced, the manufacturing time and the manufacturing cost can be reduced, and high dimensional accuracy can be obtained. The same effect can be obtained. In addition, in this manufacturing apparatus, rounding can be performed only by driving the first molding die toward and away from the second molding die by the driving means.
For example, as compared with the case where the first molding die and the second molding die are driven toward and away from the core metal, respectively, the device is simple and inexpensive, and the cylindrical component can be manufactured with high efficiency.
【００１１】[0011]
【課題を解決するための第３の手段】第３発明は、前記
第１成形型が前記第２成形型の上方に配設されて前記駆
動手段により上下駆動されるもので、その第１成形型が
前記初期位置に保持され且つ前記芯金が前記中間位置に
保持された状態において、その第１成形型と芯金との間
で前記平板素材を位置決めして支持する素材支持手段を
有する第２発明の円筒部品の製造装置であって、その素
材支持手段が、（ａ）前記平板素材の両端部に係合させ
られて、その平板素材が略水平となり且つ中央部分が前
記芯金の略真上に位置するように位置決めするととも
に、少なくともその平板素材と係合する係合部が下方へ
移動することを許容され、その平板素材が前記第１成形
型と前記芯金との間で挟まれるまではその平板素材の位
置決め状態を維持する一対の受けアームと、（ｂ）前記
係合部が上方へ移動するように前記一対の受けアームを
常に付勢し、前記平板素材が前記第１成形型と前記芯金
とによって曲げ加工されることにより、その平板素材の
両端部が下方へ回動させられて受けアームとの係合が解
除されると、その受けアームをストッパによって規定さ
れる原位置へ復帰させるアーム付勢手段とを有すること
を特徴とする。A third aspect of the present invention is that the first molding die is disposed above the second molding die and is vertically driven by the driving means. A material support means for positioning and supporting the flat plate material between the first molding die and the cored bar in a state where the mold is held at the initial position and the cored bar is held at the intermediate position. 2 is a cylindrical component manufacturing apparatus of the invention, wherein the material supporting means is (a) engaged with both ends of the flat plate material so that the flat plate material is substantially horizontal and the central portion is substantially the core bar. It is positioned so as to be located right above, and at least the engaging portion that engages with the flat plate material is allowed to move downward, and the flat plate material is sandwiched between the first molding die and the cored bar. Until the plate material is positioned The pair of receiving arms and (b) the pair of receiving arms are constantly biased so that the engaging portion moves upward, and the flat plate material is bent by the first forming die and the core metal. Thus, when both ends of the flat plate material are pivoted downward and the engagement with the receiving arm is released, the arm urging means returns the receiving arm to the original position defined by the stopper. It is characterized by
【００１２】[0012]
【作用】このような円筒部品の製造装置においては、平
板素材を位置決めして支持する素材支持手段が一対の受
けアームとアーム付勢手段とを有して構成され、平板素
材は、上下駆動される第１成形型と芯金との間において
一対の受けアームにより略水平で且つ中央部が芯金の略
真上に位置するように位置決めされる。一対の受けアー
ムは、アーム付勢手段の付勢力に従って常にはストッパ
により規定される原位置に保持されるが、少なくとも平
板素材と係合する係合部がアーム付勢手段の付勢力に抗
して下方へ移動することが許容され、第１成形型が下降
させられて平板素材がその第１成形型と芯金との間で挟
まれるまでは位置決め状態を維持する。そして、平板素
材が第１成形型と芯金とによって曲げ加工され、その平
板素材の両端部が下方へ回動させられて受けアームとの
係合が解除されると、一対の受けアームはアーム付勢手
段の付勢力に従って原位置へ復帰させられる。In such a cylindrical component manufacturing apparatus, the material supporting means for positioning and supporting the flat plate material is constituted by a pair of receiving arms and arm urging means, and the flat plate material is driven up and down. The pair of receiving arms are positioned between the first mold and the core metal such that the center part is located substantially directly above the core metal. The pair of receiving arms are always held in the original position defined by the stopper according to the urging force of the arm urging means, but at least the engaging portion engaging with the flat plate material resists the urging force of the arm urging means. And is allowed to move downward and the first forming die is lowered to maintain the positioning state until the flat plate material is sandwiched between the first forming die and the cored bar. Then, when the flat plate material is bent by the first molding die and the core metal and both ends of the flat plate material are rotated downward to release the engagement with the receiving arms, the pair of receiving arms are moved to the arms. It is returned to the original position according to the urging force of the urging means.
【００１３】なお、上記受けアームとしては、例えば芯
金の両側においてその芯金の外周成形面や第１成形型の
凹形成形面の中心線と略平行な軸心まわりの回動可能に
配設され、係合部である内端部がアーム付勢手段の付勢
力に抗して下方へ回動させられるように構成されるが、
受けアーム全体が上下方向へ平行移動させられるように
なっていても良い。また、アーム付勢手段としては、引
張コイルスプリング，圧縮コイルスプリングなどのスプ
リングの他、空圧式，油圧式の緩衝器なども好適に用い
られ得る。The receiving arm is arranged, for example, on both sides of the cored bar so as to be rotatable about an axis substantially parallel to the center line of the outer peripheral molding surface of the cored bar or the concave forming surface of the first molding die. The inner end portion, which is an engaging portion, is configured to rotate downward against the urging force of the arm urging means.
The entire receiving arm may be adapted to be translated in the vertical direction. Further, as the arm biasing means, a spring such as a tension coil spring or a compression coil spring, as well as a pneumatic or hydraulic shock absorber can be preferably used.
【００１４】[0014]
【第３発明の効果】このように、第３発明の円筒部品の
製造装置においては、平板素材が第１成形型と芯金との
間で挟まれるまで、その平板素材が略水平で且つ中央部
が芯金の略真上に位置するように素材支持手段によって
位置決めされるため、前記第２発明の効果に加えて、第
１成形型と芯金との間で確実に平板素材の中央部分が略
Ｕ字形状に曲げ加工されるとともに、このように中央部
分がＵ字形状に曲げ加工されることから、その後に第２
成形型と芯金との間で両端部が良好に挟圧されて丸めら
れるようになり、平板素材の位置ずれに起因する成形不
良が回避される。すなわち、両端部の位置がずれるとそ
の端部に対して充分な挟圧力が作用しなくなり、前記図
１０の突出寸法ｔが大きくなるなどの成形不良を生じる
のである。As described above, in the apparatus for manufacturing a cylindrical component of the third invention, the flat plate material is substantially horizontal and is centered until it is sandwiched between the first mold and the core metal. Since the portion is positioned by the material supporting means so as to be located almost directly above the core metal, in addition to the effect of the second invention, the central portion of the flat plate material is surely provided between the first mold and the core metal. Is bent into a substantially U-shape, and the central portion is bent into a U-shape in this way.
Both ends are satisfactorily pinched between the molding die and the core metal so as to be rounded, and a molding defect due to the displacement of the flat plate material is avoided. That is, if the positions of both ends are deviated, a sufficient clamping force does not act on the ends, resulting in defective molding such as an increase in the protruding dimension t in FIG.
【００１５】[0015]
【実施例】以下、本発明の一実施例を図面に基づいて詳
細に説明する。図１は円筒部品製造装置１０の正面図
で、図２はその中心線に沿った縦断面図であり、基台１
２上には第２成形型としての下型１４が取り付けられて
いるとともに、プレススライド１６には第１成形型とし
ての上型１８が下型１４に対向する姿勢で取り付けられ
ている。これ等の下型１４，上型１８には、製造すべき
円筒部品の外周面と略同じ曲率で湾曲する半円筒形状の
凹形成形面２２，２４が設けられており、それ等の凹形
成形面２２，２４の曲率中心線が互いに平行で略水平、
すなわち図１の紙面に対して略垂直となる姿勢で取り付
けられている。また、下型１４の凹形成形面２２の両側
には端部に向かうに従って上方へ傾斜するガイド面２６
が形成されている一方、上型１８の凹形成形面２４の両
側にはガイド面２６に対応する逃げ面２８が形成されて
いる。上型１８が取り付けられたプレススライド１６
は、モータやクランク軸、リンク機構などを備えたリン
ク式、或いは油圧式等の駆動手段３０によって上下駆動
されるようになっており、これにより上型１８が下型１
４に対して接近離間させられる。図１および図２は、プ
レススライド１６が上昇端まで移動させられ、上型１８
が初期位置に保持された状態である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a front view of a cylindrical component manufacturing apparatus 10, and FIG. 2 is a vertical sectional view taken along the center line thereof.
A lower mold 14 as a second mold is attached on the upper part 2 and an upper mold 18 as a first mold is attached to the press slide 16 so as to face the lower mold 14. These lower mold 14 and upper mold 18 are provided with semi-cylindrical concave forming surfaces 22 and 24 that are curved with substantially the same curvature as the outer peripheral surface of the cylindrical component to be manufactured. The center lines of curvature of the shape surfaces 22 and 24 are parallel to each other and are substantially horizontal,
That is, it is attached in a posture that is substantially perpendicular to the paper surface of FIG. Further, on both sides of the concave forming surface 22 of the lower mold 14, guide surfaces 26 that are inclined upward toward the ends are formed.
On the other hand, flanks 28 corresponding to the guide surfaces 26 are formed on both sides of the concave forming surface 24 of the upper mold 18. Press slide 16 with upper mold 18 attached
Is driven up and down by a link-type or hydraulic-type drive means 30 including a motor, a crankshaft, a link mechanism, etc., whereby the upper mold 18 is moved downward.
4 are moved closer to and separated from each other. 1 and 2, the press slide 16 is moved to the rising end, and the upper mold 18
Is in a state of being held at the initial position.
【００１６】上記初期位置に保持された状態における上
型１８と下型１４との間の中間位置には、製造すべき円
筒部品の内周面と略同じ曲率の外周成形面３２を有する
円柱形状の芯金３４が配設されている。この芯金３４
は、前記凹形成形面２２，２４の曲率中心線と平行、す
なわち略水平となる姿勢で芯金保持手段３６によって保
持されている。芯金保持手段３６は、芯金３４が片持ち
状態で取り付けられている第１支持ブロック３８と、下
型１４を挟んで第１支持ブロック３８と反対側に配設さ
れて芯金３４の先端部を支持する第２支持ブロック４０
と、それ等の支持ブロック３８，４０を上方へ付勢する
エアシリンダ４２，４４とを備えている。支持ブロック
３８，４０は、それぞれ基台１２に設けられた挿通孔４
６，４８内を上下方向の移動可能に挿通させられ、エア
シリンダ４２，４４の付勢力に従って上昇端に位置させ
られることにより、芯金３４を図に示す中間位置に保持
する。エアシリンダ４２，４４の付勢力すなわちエア圧
等は、前記上型１８が下降させられる際にその上型１８
と芯金３４とによって平板素材５０を図４に示すように
Ｕ字形状に曲げ加工できるように芯金３４を中間位置に
保持し、その後更に上型１８が下降させられる際には芯
金３４が上型１８と共に下降することを許容するように
定められる。このエアシリンダ４２，４４は芯金付勢手
段に相当する。A cylindrical shape having an outer peripheral molding surface 32 having substantially the same curvature as the inner peripheral surface of the cylindrical part to be manufactured is provided at an intermediate position between the upper mold 18 and the lower mold 14 in the state of being held in the initial position. The core metal 34 is provided. This core metal 34
Is held by the cored bar holding means 36 in a posture in which it is parallel to the center lines of curvature of the concave forming surfaces 22 and 24, that is, substantially horizontal. The cored bar holding means 36 is disposed on the opposite side of the first support block 38 to which the cored bar 34 is attached in a cantilever state and the first support block 38 with the lower die 14 interposed therebetween, and the tip of the cored bar 34. Second support block 40 for supporting the parts
And air cylinders 42 and 44 for urging the support blocks 38 and 40 upward. The support blocks 38 and 40 are the insertion holes 4 provided in the base 12, respectively.
The cored bar 34 is held in the intermediate position shown in the drawing by being inserted through the insides of 6 and 48 so as to be movable in the vertical direction and being positioned at the rising end according to the urging force of the air cylinders 42 and 44. The urging force of the air cylinders 42, 44, that is, the air pressure, is applied to the upper mold 18 when the upper mold 18 is lowered.
And the cored bar 34 hold the cored bar 34 in an intermediate position so that the flat plate material 50 can be bent into a U shape as shown in FIG. 4, and when the upper die 18 is further lowered thereafter, the cored bar 34 Are allowed to descend with the upper mold 18. The air cylinders 42, 44 correspond to core bar urging means.
【００１７】基台１２には更に、前記初期位置に保持さ
れた状態における上型１８と、中間位置に保持された状
態における芯金３４との間で平板素材５０を支持する素
材支持手段５２が配設されている。素材支持手段５２
は、平板素材５０の両端部に係合させられてその平板素
材５０を略水平、すなわち上型１８の接近離間方向と略
直角となる姿勢で支持するもので、芯金３４を挟んで左
右対称に構成されており、支持フレーム５４の上端部に
芯金３４の中心線と略水平なピン５６まわりの回動可能
に配設された受けアーム５８を備えている。受けアーム
５８は、アーム付勢手段としてのスプリング６０によっ
て常にはストッパ６２に当接する略水平な姿勢、すなわ
ち原位置に保持され、平板素材５０の端部が位置決め溝
６４に係合させられることにより、平板素材５０の中央
部分が芯金３４上に位置するように平板素材５０を位置
決めして支持する。位置決め溝６４は、受けアーム５８
の内側の端部の上面に平板素材５０の幅寸法と略同じ寸
法で形成されており、受けアーム５８のうちこの位置決
め溝６４が形成された部分が係合部に相当する。そし
て、上型１８が下降して平板素材５０に当接すると、受
けアーム５８はスプリング６０の付勢力に抗してピン５
６まわりに回動させられ、平板素材５０が上型１８と共
に下降することを許容するとともに、図３に示すように
平板素材５０が芯金３４の上部に当接して上型１８との
間で挟まれるようになるまでは平板素材５０を位置決め
している。その後平板素材５０が曲げ加工されて端部が
下方へ回動させられると、その端部と受けアーム５８と
の係合が解除され、受けアーム５８はスプリング６０の
付勢力に従って原位置へ復帰させられる。The base 12 is further provided with a material support means 52 for supporting the flat plate material 50 between the upper die 18 held in the initial position and the cored bar 34 held in the intermediate position. It is arranged. Material support means 52
Is engaged with both ends of the flat plate material 50 and supports the flat plate material 50 in a substantially horizontal posture, that is, in a posture substantially perpendicular to the approaching / separating direction of the upper die 18, and is symmetrical with the cored bar 34 interposed therebetween. The upper end of the support frame 54 is provided with a receiving arm 58 rotatably arranged around a pin 56 that is substantially horizontal to the center line of the cored bar 34. The receiving arm 58 is held in a substantially horizontal posture in which it is always in contact with the stopper 62, that is, in the original position by a spring 60 as an arm urging means, and the end portion of the flat plate material 50 is engaged with the positioning groove 64. The flat plate material 50 is positioned and supported so that the central portion of the flat plate material 50 is located on the cored bar 34. The positioning groove 64 is provided on the receiving arm 58.
Is formed on the upper surface of the inner end portion of the flat plate material 50 with substantially the same width dimension, and the portion of the receiving arm 58 in which the positioning groove 64 is formed corresponds to the engaging portion. Then, when the upper die 18 descends and comes into contact with the flat plate material 50, the receiving arm 58 resists the urging force of the spring 60, and the pin 5 moves.
It is rotated around 6 to allow the flat plate material 50 to descend together with the upper die 18, and as shown in FIG. The flat plate material 50 is positioned until it is sandwiched. Thereafter, when the flat plate material 50 is bent and the end portion is rotated downward, the engagement between the end portion and the receiving arm 58 is released, and the receiving arm 58 is returned to the original position according to the urging force of the spring 60. To be
【００１８】以上のように構成された円筒部品製造装置
１０においては、図１および図２に示すように上型１８
が初期位置に保持されるとともに芯金３４が中間位置に
保持された状態において、それ等の上型１８と芯金３４
との間に自動若しくは手作業で供給された平板素材５０
を、素材支持手段５２により位置決めして支持する。そ
して、その状態で駆動手段３０によりプレススライド１
６が下降，上昇させられると、平板素材５０がプレス加
工されて丸められ、図７に示す円筒部品２０が製造され
る。In the cylindrical component manufacturing apparatus 10 configured as described above, as shown in FIGS.
Are held in the initial position and the cored bar 34 is held in the intermediate position, the upper mold 18 and the cored bar 34 are
Plate material 50 automatically or manually supplied between and
Is positioned and supported by the material support means 52. Then, in that state, the press slide 1 is driven by the driving means 30.
When 6 is lowered and raised, the flat plate material 50 is pressed and rolled to manufacture the cylindrical part 20 shown in FIG. 7.
【００１９】すなわち、先ず、上型１８が平板素材５０
に当接させられることにより、平板素材５０は素材支持
手段５２によって位置決めされたまま上型１８と共に下
降させられ、図３に示すように芯金３４に当接させられ
る。その後更に上型１８が下降させられると、図４に示
すように平板素材５０は上型１８と芯金３４との間で挟
圧され、中央部分が曲げ加工されて略Ｕ字形状の中間品
７０が得られる。平板素材５０は、芯金３４に当接する
まで素材支持手段５２によって位置決めされているた
め、確実に中央部分が曲げ加工されるとともに、この曲
げ加工の過程で受けアーム５８から平板素材５０が離脱
して素材支持手段５２による位置決めが解除される。ま
た、芯金３４は芯金保持手段３６のエアシリンダ４２，
４４によって中間位置に保持され、その中間位置に保持
された状態で平板素材５０に曲げ加工が行われる。この
ように上型１８と芯金３４とによって平板素材５０をＵ
字形状に曲げ加工する工程がＵ字曲げ工程である。That is, first, the upper die 18 is a flat plate material 50.
The flat plate material 50 is lowered together with the upper die 18 while being positioned by the material supporting means 52 by being brought into contact with the core metal 34, as shown in FIG. Then, when the upper die 18 is further lowered, the flat plate material 50 is clamped between the upper die 18 and the core metal 34 as shown in FIG. 4, and the central portion is bent to form a substantially U-shaped intermediate product. 70 is obtained. Since the flat plate material 50 is positioned by the material supporting means 52 until it comes into contact with the cored bar 34, the central portion is surely bent, and the flat plate material 50 is detached from the receiving arm 58 in the process of bending. The positioning by the material support means 52 is released. Further, the cored bar 34 is an air cylinder 42 of the cored bar holding means 36,
The flat plate material 50 is held at the intermediate position by 44, and the flat plate material 50 is bent while being held at the intermediate position. In this way, the flat plate material 50 is U-shaped by the upper mold 18 and the core metal 34.
The process of bending into a letter shape is a U-shaped bending process.
【００２０】図４に示すように、平板素材５０が芯金３
４の外周成形面３２および上型１８の凹形成形面２４に
密着するまで曲げ加工されると、プレススライド１６が
更に下降させられるのに伴って、芯金３４はエアシリン
ダ４２，４４の付勢力に抗して上型１８，曲げ加工され
た中間品７０と共に下降させられる。そして、プレスス
ライド１６が下死点に達すると、図５に示すように下型
１４との間で中間品７０の両端部に曲げ加工が施され、
目的とする円筒部品２０が得られる。中間品７０の両端
部は略平行或いは僅かに拡開するように下型１４側へ延
び出しているが、下型１４にはガイド面２６が設けられ
ているため、その両端部は確実に凹形成形面２２に沿っ
て内側へ曲げられ、その凹形成形面２２と外周成形面３
２との間で挟圧されることにより円筒形状に曲げ加工さ
れる。平板素材５０の長さ寸法は目的とする円筒部品２
０の肉厚中心における周長さより多少長めに定められ、
曲げ加工に伴って両端部が突き当てられるが、凹形成形
面２２と外周成形面３２との間で挟圧されるため、座屈
したり撓んだりすることがない。このように芯金３４と
下型１４との間で中間品７０の両端部を挟圧して曲げ加
工する工程が端部曲げ工程である。As shown in FIG. 4, the flat plate material 50 is the core metal 3
4 is bent until it comes into close contact with the outer peripheral molding surface 32 of 4 and the concave molding surface 24 of the upper die 18, the core metal 34 is attached to the air cylinders 42, 44 as the press slide 16 is further lowered. The upper die 18 and the bent intermediate product 70 are moved down against the force. Then, when the press slide 16 reaches the bottom dead center, both ends of the intermediate product 70 are bent between the press slide 16 and the lower mold 14, as shown in FIG.
The intended cylindrical part 20 is obtained. Both ends of the intermediate product 70 extend to the lower mold 14 side so as to be substantially parallel or slightly open, but since the lower mold 14 is provided with the guide surface 26, both ends thereof are surely concave. Bent inward along the forming surface 22 and its concave forming surface 22 and outer peripheral forming surface 3
It is bent into a cylindrical shape by being clamped between the two. The length dimension of the flat plate material 50 is the target cylindrical part 2
It is set slightly longer than the perimeter at the center of wall thickness of 0,
Both ends are abutted along with the bending work, but since they are pinched between the concave forming surface 22 and the outer peripheral forming surface 32, they do not buckle or bend. In this way, the step of bending by pressing both ends of the intermediate product 70 between the core metal 34 and the lower mold 14 is the end bending step.
【００２１】その後、プレススライド１６が上昇端まで
戻されると、芯金３４はエアシリンダ４２，４４の付勢
力に従って中間位置まで上昇させられる。図６はこの状
態であり、芯金３４を第１支持ブロック３８から取り外
すことにより、円筒形状に丸められた円筒部品２０を取
り出すことができる。エアシリンダ４４のエア回路を切
り換えて第２支持ブロック４０を下降させて、芯金３４
から円筒部品２０を抜き取るようにしても良い。Thereafter, when the press slide 16 is returned to the rising end, the cored bar 34 is raised to the intermediate position according to the urging force of the air cylinders 42 and 44. FIG. 6 shows this state, and by removing the cored bar 34 from the first support block 38, the cylindrical component 20 rolled into a cylindrical shape can be taken out. The air circuit of the air cylinder 44 is switched to lower the second support block 40, and the core metal 34
The cylindrical part 20 may be pulled out from the.
【００２２】ここで、本実施例では上型１８と芯金３４
との間で平板素材５０を挟圧してＵ字曲げを行うととも
に、下型１４と芯金３４との間で中間品７０の端部を挟
圧してその端部を曲げ加工するため、平板素材５０の中
央部分は勿論端部まで高い精度で曲げ加工が施され、高
い寸法精度が得られる。端部まで確実に曲げ加工が施さ
れることから、図９の（ｃ）のように外周側から素材を
押圧するだけの場合に比較して突出寸法ｔ（図１０参
照）が小さく、その修正が不要である。また、このよう
に挟圧して曲げ加工を行うことから、平板素材５０の長
さ寸法が目的とする円筒部品２０の肉厚中心における周
長さより多少長くても、曲げ加工に伴って両端部が突き
当たることにより座屈したり撓んだりすることがなく、
素材長さを長めに設定して両端部を突き当てることによ
り、スプリングバックによって生じる隙間ｄ（図７参
照）を例えば１ｍｍ程度以下に小さくできる。なお、芯
金３４を取り外した状態で下型１４および上型１８によ
り円筒部品２０にプレス加工を施せば、上記隙間ｄを略
零とすることができる。Here, in this embodiment, the upper die 18 and the core metal 34 are
The flat plate material 50 is sandwiched between the lower mold 14 and the core metal 34 by pressing the flat plate material 50 between the lower mold 14 and the core metal 34 to bend the end of the intermediate product 70. Bending is performed with high accuracy not only in the central portion of 50 but also in the end portion, so that high dimensional accuracy can be obtained. Since the bending work is surely performed up to the end portion, the protruding dimension t (see FIG. 10) is small as compared with the case where only the material is pressed from the outer peripheral side as shown in (c) of FIG. Is unnecessary. Further, since bending is performed by pinching in this way, even if the length dimension of the flat plate material 50 is slightly longer than the circumferential length at the center of the wall thickness of the cylindrical component 20 that is intended, both ends are bent together. It does not buckle or bend due to bumping,
The gap d (see FIG. 7) caused by the spring back can be reduced to, for example, about 1 mm or less by setting the material length to be long and abutting the both ends. If the cylindrical part 20 is pressed by the lower mold 14 and the upper mold 18 with the core metal 34 removed, the gap d can be made substantially zero.
【００２３】一方、本実施例では上型１８と芯金３４と
の間で平板素材５０を挟圧してＵ字曲げを行った後、そ
のまま下型１４と芯金３４との間で中間品７０の端部を
挟圧して曲げ加工するようにしているため、図９のよう
に３工程で丸め加工を行う場合に比較し、工程数やプレ
ス設備が少なくなって製造時間，製造コストを低減でき
るとともに、プレス設備毎の精度のばらつきや素材の位
置決め誤差などの積み重ねによる寸法誤差の拡大が回避
され、この点でも高い寸法精度が得られるようになる。On the other hand, in this embodiment, after the flat plate material 50 is pressed between the upper die 18 and the core metal 34 to perform U-bending, the intermediate product 70 is directly placed between the lower die 14 and the core metal 34. Since the end portion of each is bent and bent, the number of steps and the press equipment are reduced and the manufacturing time and the manufacturing cost can be reduced as compared with the case where the rounding is performed in three steps as shown in FIG. At the same time, it is possible to avoid an increase in dimensional error due to stacking such as a variation in accuracy of each press equipment and a positioning error of materials, and also in this respect, high dimensional accuracy can be obtained.
【００２４】更に、駆動手段３０によって上型１８を下
降，上昇させるだけで丸め加工が行われるため、例えば
芯金３４を位置固定に配置して上型１８および下型１４
をそれぞれ芯金３４に対して接近離間駆動する場合に比
較して、製造装置１０が簡単且つ安価に構成されるとと
もに高能率で円筒部品２０を製造できる。Further, since the rounding process is performed only by lowering and raising the upper die 18 by the driving means 30, for example, the cored bar 34 is fixedly positioned and the upper die 18 and the lower die 14 are placed.
The manufacturing apparatus 10 can be configured easily and inexpensively, and the cylindrical component 20 can be manufactured with high efficiency, as compared with the case where each is driven toward and away from the core metal 34.
【００２５】また、本実施例では平板素材５０が上型１
８と芯金３４との間で挟まれるまで、その平板素材５０
が略水平で且つ中央部が芯金３４の略真上に位置するよ
うに素材支持手段５２によって位置決めされるため、上
型１８と芯金３４との間で確実に平板素材５０の中央部
分が略Ｕ字形状に曲げ加工されるとともに、このように
中央部分がＵ字形状に曲げ加工されることから、その後
に下型１４と芯金３４との間で両端部が良好に挟圧され
て丸められるようになり、平板素材５０の位置ずれに起
因する成形不良が回避される。すなわち、両端部の位置
がずれるとその端部に対して充分な挟圧力が作用しなく
なり、前記図１０の突出寸法ｔが大きくなるなどの成形
不良を生じるのである。In this embodiment, the flat plate material 50 is the upper mold 1
The flat plate material 50 until it is sandwiched between 8 and the core metal 34.
Is substantially horizontal and the central portion is positioned by the material supporting means 52 so as to be positioned substantially directly above the cored bar 34, so that the central portion of the flat plate material 50 is surely positioned between the upper die 18 and the cored bar 34. Since it is bent into a substantially U-shape and the central portion is bent into a U-shape in this manner, thereafter, both ends are squeezed well between the lower mold 14 and the core metal 34. As a result of being rounded, defective molding due to the displacement of the flat plate material 50 can be avoided. That is, if the positions of both ends are deviated, a sufficient clamping force does not act on the ends, resulting in defective molding such as an increase in the protruding dimension t in FIG.
【００２６】なお、本実施例の円筒部品２０は平板素材
５０を円筒形状に丸めただけであるが、図８に示す円筒
部品７２のように、互いに突き合わされる平板素材の両
端部に凸部７４および凹部７６を設け、丸め加工の際に
凸部７４が凹部７６内に圧入されるようにすることも可
能で、その場合にはスプリングバックによる隙間ｄの発
生を防止できる。凸部７４および凹部７６の形状は共に
直角コの字形状としても良いが、例えば凹部７６を直角
コの字形状として凸部７４を逆台形形状としても良いな
ど任意に定められ、その数についても１対だけでなく複
数対設けることが可能である。The cylindrical component 20 of this embodiment is obtained by only rounding the flat plate material 50 into a cylindrical shape. However, like the cylindrical component 72 shown in FIG. It is also possible to provide 74 and the concave portion 76 so that the convex portion 74 is press-fitted into the concave portion 76 at the time of rounding, and in that case, the generation of the gap d due to the spring back can be prevented. The shapes of the convex portions 74 and the concave portions 76 may both be U-shapes at right angles, but the concave portions 76 may be at right-angled U-shapes, and the convex portions 74 may be at an inverted trapezoidal shape. It is possible to provide not only one pair but a plurality of pairs.
【００２７】以上、本発明の実施例を図面に基づいて詳
細に説明したが、本発明は他の態様で実施することもで
きる。Although the embodiments of the present invention have been described in detail with reference to the drawings, the present invention can be implemented in other modes.
【００２８】例えば、前記実施例では芯金付勢手段とし
てエアシリンダ４２，４４が用いられていたが、単一の
エアシリンダで付勢することもできるし、圧縮コイルス
プリングなどのスプリングを用いることも可能である。For example, although the air cylinders 42 and 44 are used as the core bar urging means in the above-described embodiment, they can be urged by a single air cylinder, or a spring such as a compression coil spring is used. Is also possible.
【００２９】また、前記実施例では支持ブロック３８，
４０が基台１２に設けられた挿通孔４６，４８によって
上下方向へ案内されるようになっていたが、ガイドレー
ルやガイドロッドなどの他の案内手段を用いることもで
きる。In the above embodiment, the support block 38,
Although 40 is guided in the vertical direction by the insertion holes 46 and 48 provided in the base 12, other guide means such as a guide rail or a guide rod may be used.
【００３０】また、前記実施例では第１成形型としての
上型１８が上下動させられるようになっていたが、成形
型の駆動方向は適宜設定することが可能で、例えば水平
方向へ駆動するようにしても良い。Further, in the above-mentioned embodiment, the upper mold 18 as the first mold is designed to be moved up and down, but the driving direction of the mold can be set appropriately, for example, it is driven in the horizontal direction. You may do it.
【００３１】その他一々例示はしないが、本発明は当業
者の知識に基づいて種々の変更，改良を加えた態様で実
施することができる。Although not illustrated one by one, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art.
【図１】本発明の一実施例である円筒部品製造装置の一
部を切り欠いた正面図である。FIG. 1 is a front view in which a part of a cylindrical part manufacturing apparatus according to an embodiment of the present invention is cut away.
【図２】図１の製造装置の縦断面図である。FIG. 2 is a vertical sectional view of the manufacturing apparatus in FIG.
【図３】図１の製造装置において、上型が下降させられ
て平板素材が芯金に当接させられた状態を示す図であ
る。FIG. 3 is a view showing a state in which the upper die is lowered and the flat plate material is brought into contact with the cored bar in the manufacturing apparatus of FIG. 1.
【図４】図１の製造装置において、上型と芯金とによっ
てＵ字曲げが行われた状態を示す断面図である。FIG. 4 is a cross-sectional view showing a state where U-shaped bending is performed by the upper die and the core metal in the manufacturing apparatus of FIG.
【図５】図１の製造装置において、下型と芯金とによっ
て端部曲げが行われた状態を示す断面図である。FIG. 5 is a cross-sectional view showing a state where end bending is performed by the lower die and the core metal in the manufacturing apparatus of FIG.
【図６】図１の製造装置において、丸め加工が行われた
後上型が初期位置まで上昇させられた状態を示す図であ
る。FIG. 6 is a diagram showing a state in which the upper die has been raised to an initial position after being rounded in the manufacturing apparatus of FIG. 1.
【図７】図１の製造装置によって製造される円筒部品の
一例を示す斜視図である。7 is a perspective view showing an example of a cylindrical part manufactured by the manufacturing apparatus of FIG.
【図８】図１の製造装置によって製造される円筒部品の
別の例を示す斜視図である。8 is a perspective view showing another example of the cylindrical part manufactured by the manufacturing apparatus of FIG.
【図９】従来の丸め加工の手順を説明する図である。FIG. 9 is a diagram illustrating a conventional rounding procedure.
【図１０】図９に示す丸め加工で得られる円筒部品の突
出寸法ｔを説明する図である。FIG. 10 is a diagram illustrating a protrusion dimension t of the cylindrical component obtained by the rounding process shown in FIG. 9.
１０：円筒部品製造装置 １４：下型（第２成形型） １８：上型（第１成形型） ２０，７２：円筒部品 ３０：駆動手段 ３４：芯金 ３６：芯金保持手段 ４２，４４：エアシリンダ（芯金付勢手段） ５０：平板素材 ５２：素材支持手段 ５８：受けアーム ６０：スプリング（アーム付勢手段） ６２：ストッパ ６４：位置決め溝（係合部） ７０：中間品 10: Cylindrical component manufacturing device 14: Lower mold (second molding mold) 18: Upper mold (first molding mold) 20, 72: Cylindrical component 30: Driving means 34: Core metal 36: Core metal holding means 42, 44: Air cylinder (core metal urging means) 50: Flat plate material 52: Material supporting means 58: Receiving arm 60: Spring (arm urging means) 62: Stopper 64: Positioning groove (engaging portion) 70: Intermediate product
Claims (3)
状の円筒部品を製造する方法であって、 略半円筒形状の凹形成形面を有する第１成形型と略円筒
形状の外周成形面を有する芯金との間で前記平板素材を
挟圧することにより、該平板素材を曲げ加工して略Ｕ字
形状の中間品を得るＵ字曲げ工程と、 該中間品を前記第１成形型と芯金との間で挟圧したま
ま、略半円筒形状の凹形成形面を有する第２成形型を該
第１成形型と反対側から相対的に該芯金に接近させ、該
中間品の両端部を該第２成形型と芯金との間で挟圧して
曲げ加工する端部曲げ工程とを含むことを特徴とする円
筒部品の製造方法。1. A method for manufacturing a substantially cylindrical cylindrical part by rolling a flat plate material by press working, comprising a first molding die having a substantially semi-cylindrical concave forming surface and a substantially cylindrical outer peripheral molding surface. A U-shaped bending step of bending the flat plate material to obtain a substantially U-shaped intermediate product by sandwiching the flat plate material between the core metal having the core and the first molding die. The second molding die having a substantially semi-cylindrical concave forming surface is relatively approached to the core metal from the side opposite to the first molding die while being clamped between the core metal and A method of manufacturing a cylindrical part, comprising: an end bending step of pressing both ends between the second molding die and the core metal to perform bending.
状の円筒部品を製造する装置であって、 それぞれ略半円筒形状の凹形成形面を有するとともに互
いに対向して配設される一対の第１成形型および第２成
形型と、 位置固定に配設された前記第２成形型に対して前記第１
成形型を接近離間駆動する駆動手段と、 前記第１成形型が前記第２成形型から離間する初期位置
に保持された状態において、該第１成形型と該第２成形
型との間の中間位置に保持される略円筒形状の外周成形
面を有する芯金と、 前記第１成形型が前記第２成形型に接近させられる際
に、該第１成形型と前記芯金との間で前記平板素材が曲
げ加工されるように、芯金付勢手段の付勢力に従って該
芯金を前記中間位置に保持する一方、前記第１成形型が
更に前記第２成形型に接近させられると、前記付勢力に
抗して前記芯金が該第１成形型と共に該第２成形型に接
近することを許容する芯金保持手段とを有することを特
徴とする円筒部品の製造装置。2. An apparatus for manufacturing a substantially cylindrical cylindrical part by rolling a flat plate material by press working, and comprising a pair of opposed semi-cylindrical concave surfaces. A first mold and a second mold, and the first mold with respect to the second mold fixedly arranged.
Drive means for driving the molds toward and away from each other, and an intermediate position between the first molds and the second molds in a state where the first molds are held at an initial position where they are separated from the second molds. A cored bar having a substantially cylindrical outer peripheral molding surface that is held in a position, and when the first molding die is brought close to the second molding die, the cored metal is provided between the first molding die and the cored metal. When the first metal mold is further brought closer to the second metal mold while holding the metal core in the intermediate position according to the urging force of the metal core urging means so that the flat plate material is bent, An apparatus for manufacturing a cylindrical component, comprising: a core metal holding unit that allows the core metal to approach the second mold together with the first mold against an urging force.
に配設されて前記駆動手段により上下駆動されるもの
で、該第１成形型が前記初期位置に保持され且つ前記芯
金が前記中間位置に保持された状態において、該第１成
形型と該芯金との間で前記平板素材を位置決めして支持
する素材支持手段を有する請求項２に記載の円筒部品の
製造装置であって、該素材支持手段が、 前記平板素材の両端部に係合させられて、該平板素材が
略水平となり且つ中央部分が前記芯金の略真上に位置す
るように位置決めするとともに、少なくとも該平板素材
と係合する係合部が下方へ移動することを許容され、該
平板素材が前記第１成形型と前記芯金との間で挟まれる
までは該平板素材の位置決め状態を維持する一対の受け
アームと、 前記係合部が上方へ移動するように前記一対の受けアー
ムを常に付勢し、前記平板素材が前記第１成形型と前記
芯金とによって曲げ加工されることにより、該平板素材
の両端部が下方へ回動させられて該受けアームとの係合
が解除されると、該受けアームをストッパによって規定
される原位置へ復帰させるアーム付勢手段とを有するこ
とを特徴とする円筒部品の製造装置。3. The first molding die is disposed above the second molding die and is vertically driven by the driving means, the first molding die being held at the initial position and the core metal. 3. The apparatus for manufacturing a cylindrical part according to claim 2, further comprising a material support means for positioning and supporting the flat plate material between the first molding die and the core metal in a state where is held at the intermediate position. There, the material supporting means is engaged with both ends of the flat plate material to position the flat plate material so that it is substantially horizontal and the central portion is located substantially directly above the core metal, and at least The engaging portion that engages with the flat plate material is allowed to move downward, and the flat plate material is maintained in the positioned state until the flat plate material is sandwiched between the first molding die and the core metal. A pair of receiving arms and the engaging part move upward As described above, the pair of receiving arms are constantly urged, and the flat plate material is bent by the first molding die and the core metal so that both ends of the flat plate material are rotated downward. An apparatus for manufacturing a cylindrical component, comprising: arm urging means for returning the receiving arm to the original position defined by the stopper when the engagement with the receiving arm is released.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9435594A JPH07299520A (en) | 1994-05-06 | 1994-05-06 | Method for manufacturing cylindrical parts and device therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9435594A JPH07299520A (en) | 1994-05-06 | 1994-05-06 | Method for manufacturing cylindrical parts and device therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07299520A true JPH07299520A (en) | 1995-11-14 |
Family
ID=14107989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9435594A Pending JPH07299520A (en) | 1994-05-06 | 1994-05-06 | Method for manufacturing cylindrical parts and device therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07299520A (en) |
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| JP2011104653A (en) * | 2009-10-23 | 2011-06-02 | Wada Seisakusho:Kk | Tubular body forming press machine and tubular body forming press method |
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| JP2017185516A (en) * | 2016-04-04 | 2017-10-12 | サクラ工業株式会社 | Non-weld seam pipe and manufacturing method of the same |
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