JP3964987B2

JP3964987B2 - Roll forming device

Info

Publication number: JP3964987B2
Application number: JP20680998A
Authority: JP
Inventors: 一登都倉; 幸男小松; 健一岡田; 敬太関根; 栄治龍川
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 1998-07-22
Filing date: 1998-07-22
Publication date: 2007-08-22
Anticipated expiration: 2018-07-22
Also published as: JP2000042643A

Description

【０００１】
【発明の属する技術分野】
本発明は、ロールによりワークのフォーミング加工を行うロールフォーミング装置に関する。
【０００２】
【従来の技術】
従来、この種のロールフォーミング装置において、互に直交する水平２方向の一方をＸ軸方向、他方をＹ軸方向として、ベッド上に、Ｘ軸方向に対向する主軸台と心押台とを配置すると共に、Ｙ軸方向に対向する１対のロール支持台を配置し、心押台を主軸台に向けてＸ軸方向に移動して、主軸台と心押台との間にワークを挟持し、両ロール支持台をＹ軸方向内方に移動すると共にＸ軸方向に移動して、両ロール支持台に軸支したロールによりワークのフォーミング加工を行うようにしたものが知られている。
【０００３】
そして、このものでは、ベッド上に、Ｙ軸方向に長手の平板状の可動台をＸ軸方向に移動自在に設け、可動台に１対のロール支持台をＹ軸方向に移動自在に搭載し、可動台のＹ軸方向の各端部に取付けた駆動源で各ロール支持台をＹ軸方向に移動させるようにしている。
【０００４】
【発明が解決しようとする課題】
両ロール支持台をＹ軸方向内方に移動させてロールをワークに食い込ませる際、可動台のＹ軸方向両端の駆動源の取付部に作用するＹ軸方向外方への成形反力で可動台が反り、更に、可動台の動きで両ロール支持台をＸ軸方向に移動してロールによりワークをしごく際、Ｘ軸方向の成形反力で可動台が捩れることがある。また、ワークを主軸台と心押台との間に強固に挟持するため、心押台をベッド上に取付けた駆動源により主軸台に向けてＸ軸方向内方に強い力で押圧する必要があり、その結果、ベッドの主軸台の取付部と心押台の駆動源の取付部とにＸ軸方向外方への大きな押圧反力が作用してベッドが反ることがある。このように、可動台の反りや捩れやベッドの反りを生ずると、ワークとローラとの相対位置精度に狂いを生じ、ワークの加工精度が悪化する。
【０００５】
本発明は、以上の点に鑑み、可動台の反りや捩れやベッドの反りを防止して、ワークの加工精度を向上し得るようにしたロールフォーミング装置を提供することを課題としている。
【０００６】
【課題を解決するための手段】
上記課題を解決すべく、本発明は、互に直交する水平２方向の一方をＸ軸方向、他方をＹ軸方向として、ベッド上に、Ｘ軸方向に対向する主軸台と心押台とを配置すると共に、Ｙ軸方向に対向する１対のロール支持台を配置し、心押台を主軸台に向けてＸ軸方向に移動して、主軸台と心押台との間にワークを挟持し、両ロール支持台をＹ軸方向内方に移動すると共にＸ軸方向に移動して、両ロール支持台に軸支したロールによりワークのフォーミング加工を行うロールフォーミング装置において、ベッド上に、両ロール支持台をＹ軸方向に移動自在に搭載したＹ軸方向に長手の可動台をＸ軸方向に移動自在に設け、可動台を少なくともＹ軸方向両端の端壁と、これら端壁を接続する底壁および天井壁と、これら底壁および天井壁を接続する側壁とを有する箱形に形成して、各端壁に各ロール支持台をＹ軸方向に移動する駆動源を取付けると共に、固定台の上部と主軸台の上部とをタイロッドを介して結合し、側壁を、ロールがワークをしごく方向と反対側の可動台の一面に配置し、該側壁に、心押台が通過する開口を設けるとともに、両ロール支持台をＹ軸方向に移動自在に支持している。
【０００７】
両ロール支持台をＹ軸方向内方に移動させてロールをワークに食い込ませる際、ロール支持台用の駆動源の取付部となる可動台の端壁にＹ軸方向外方への成形反力が作用するが、この成形反力は可動台の底壁と天井壁とで均等に受けられ、可動台全体として成形反力による曲げモーメントは作用せず、可動台の反りは生じない。更に、可動台を箱形に形成することで可動台の捩り剛性が高くなり、可動台の動きで両ロール支持台をＸ軸方向に移動してロールによりワークをしごく際に作用するＸ軸方向の成形反力による可動台の捩れも有効に防止される。
【０００８】
押台をＸ軸方向に移動する駆動源をベッド上の固定台に取付け、固定台の上部と主軸台の上部とをタイロッドを介して結合することが望ましい。タイロッドは、固定台に取付けた駆動源による心押台の軸方向内方への押動で主軸台との間にワークを挟持したときに固定台と主軸台とに作用する軸方向外方への挟持反力の作用線より上方に位置することになり、押圧反力によるベッドの反りがタイロッドで効果的に防止される。
【０００９】
ところで、可動台の底壁上に両ロール支持台をＹ軸方向に移動自在に支持することも考えられるが、これではロールによるワークのしごきに際して作用するＸ軸方向の成形反力でロール支持台にＸ軸方向の回転モーメントが作用し、ロール支持台がＸ軸方向に傾動し易くなる。これに対し、可動台に、Ｘ軸方向一側の側壁を設け、側壁に両ロール支持台をＹ軸方向に移動自在に支持させれば、Ｘ軸方向の成形反力をその作用線に直交する側壁で受けられるようになる。そのため、ロール支持台にＸ軸方向の回転モーメントは作用しなくなり、ロール支持台の傾動が防止される。
【００１０】
【発明の実施の形態】
図１乃至図３を参照して、１はベッドであり、ベッド１上に、互に直交する水平２方向の一方をＸ軸方向、他方をＹ軸方向として、Ｘ軸方向に対向する主軸台２と心押台３とを配置すると共に、Ｙ軸方向に対向する１対のロール支持台４，４を配置し、主軸台２と心押台３との間に挟持されるワークＷをロール支持台４，４に軸支したロール４ａ，４ａでフォーミング加工するロールフォーミング装置を構成している。
【００１１】
主軸台２は、ベッド１に固定されており、一方、心押台３は、ベッド１上の２本ガイドレール５に沿ってＸ軸方向に移動自在となっており、ベッド１上の固定台６に取付けた油圧シリンダから成る駆動源７により心押台３をＸ軸方向に移動するようにしている。
【００１２】
主軸台２と心押台３とには、夫々スピンドル２ａ，３ａが軸支されており、主軸台２のスピンドル２ａをベッド１上のスピンドルモータ８によりベルト８ａを介して回転させるようにしている。図４に明示されているように、主軸台２のスピンドル２ａの先端にはマンドレル２ｂが取付けられており、一方、心押台３のスピンドル３ａの先端にはワーク押え３ｂが取付けられている。そして、主軸台２のスピンドル２ａ及びマンドレル２ｂを貫通するノックアウト兼用のセットピン２ｃを設け、セットピン２ｃに中心穴において嵌合セットされるワークＷを心押台３の主軸台２側への移動でマンドレル２ｂとワーク押え３ｂとの間に挟持するようにしている。
【００１３】
この場合、ワークＷを強固に挟持してフォーミング加工中のワークＷのずれを防止するため、心押台３を駆動源７により６０ｔという強い力で主軸台２側に押圧する必要がある。その結果、主軸台２と固定台６とにＸ軸方向外方への大きな挟持反力が作用し、このままではベッド１が押圧反力による曲げモーメントを受けて反りを生ずる可能性がある。そこで、本実施形態では、主軸台２の上部のＹ軸方向２箇所と固定台５の上部のＹ軸方向２箇所とをＹ軸方向に並設した２本のタイロッド９，９を介して結合している。これによれば、主軸台２と固定台５とに作用するＸ軸方向外方への挟持反力が挟持反力の作用線より上方に位置するタイロッド９で分担して受けられ、ベッド１に作用する曲げモーメントが減少してベッド１の反りが有効に防止される。
【００１４】
前記両ロール支持台４，４は、ベッド１上に４本のガイドレール１０でＸ軸方向に移動自在に支持したＹ軸方向に長手の可動台１１に、Ｙ軸方向に移動自在に搭載されており、ベッド１に取付けたサーボモータから成る駆動源１２により送りねじ機構１２ａを介して可動台１１、即ち、両ロール支持台４，４をＸ軸方向に移動するようにしている。
【００１５】
可動台１１は、ガイドレール１０に支持される底壁１１ａと、天井壁１１ｂと、Ｙ軸方向両端の端壁１１ｃ，１１ｃと、Ｘ軸方向一側の側壁１１ｄとを有する箱形に形成されている。本実施形態で側壁１１ｄは、心押台３側の側面にＹ軸方向中央の開口部１１ｅを挟んで１対に設けられており、開口部１１ｅを通して心押台３の先端部を可動台１１内に臨入させると共に、前記タイロッド９を開口部１１ｅを通して主軸台２と固定台６との間に架設している。各ロール支持台４は、各側壁１１ｄに上下３本のガイドレール１３でＹ軸方向に移動自在に支持されており、各端壁１１ｃに取付けたサーボモータから成る駆動源１４により送りねじ機構を介して各ロール支持台４をＹ軸方向に移動させるようにしている。
【００１６】
ワークＷのフォーミング加工に際しては、先ず、心押台３を主軸台２に向けてＸ軸方向に移動して、上記の如くマンドレル２ｂとワーク押え３ｂとの間にワークＷを挟持し、この状態でスピンドル２ａを駆動してワークＷを回転させる。次に、両ロール支持台４，４をＹ軸方向内方に移動し、両ロール支持台４，４に軸支したロール４ａ，４ａをＹ軸方向両側からワークＷの周面に図４の実線示の如く食い込ませる。次いで、可動台１１をＸ軸方向に移動して、ロール４ａ，４ａによりワークＷの周面部分の肉をマンドレル２ｂ側にしごき出し、ワークＷを図４の仮想線示の形状にフォーミング加工する。
【００１７】
ここで、ロール４ａ，４ａをワークＷに食い込ませると、可動台１１の端壁１１ｃ，１１ｃにＹ軸方向外方への成形反力が作用するが、この成形反力は可動台１１の底壁１１ａと天井壁１１ｂとで均等に受けられる。そのため、可動台１１全体としてＹ軸方向成形反力による曲げモーメントは作用せず、可動台１１の反りは生じない。
【００１８】
また、ロール４ａでワークＷをＸ軸方向にしごくと、ロール支持台４にＸ軸方向の成形反力が作用するが、ロール支持台４の支持部となる可動台１１の側壁１１ｄはＸ軸方向に直交するため、ロール支持台４にＸ軸方向成形反力による傾動モーメントは作用せず、ロール支持台４の傾動が防止される。更に、可動台１１を箱形に形成することで可動台１１の捩り剛性が高くなり、Ｘ軸方向成形反力による可動台１１の捩りも有効に防止される。また、Ｘ軸方向成形反力で可動台１１に作用するＹ軸回りの回転モーメントは、可動台１１用のガイドレール１０で受けられる。かくて、ワークＷとロール４ａとの相対位置精度を確保して、ワークＷを高精度でフォーミング加工できる。
【００１９】
尚、上記実施形態では、主軸台２のスピンドル２ａにのみマンドレル２ｂを取付けたが、心押台３のスピンドル３ａにもマンドレルを取付けて、ワークＷの肉を主軸台２側マンドレルと心押台３側マンドレルとにしごき出すようなフォーミング加工を行う場合にも、同様に本発明を適用できる。
【００２０】
【発明の効果】
以上の説明から明らかなように、本発明によれば、成形反力による可動台の反りや捩れを防止できると共に、ワークの挟持反力によるベッドの反りも防止でき、ワークとロールとの相対位置精度を確保して、ワークの加工精度を向上できる。
【図面の簡単な説明】
【図１】本発明装置の一例の平面図
【図２】図１の矢印II方向から見た正面図
【図３】図１のIII−III線截断側面図
【図４】ワークの加工状態を示す図
【符号の説明】
１ベッド２主軸台３心押台
４ロール支持台４ａロール６固定台
７心押台用駆動源９タイロッド１１可動台
１１ａ底壁１１ｂ天井壁１１ｃ端壁
１１ｄ側壁１４ロール支持台用駆動源[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roll forming apparatus that forms a workpiece with a roll.
[0002]
[Prior art]
Conventionally, in this type of roll forming apparatus, a headstock and a tailstock that face each other in the X-axis direction are arranged on the bed, with one of the two horizontal directions orthogonal to each other set as the X-axis direction and the other as the Y-axis direction. At the same time, a pair of roll support tables opposed to the Y-axis direction are arranged, the tailstock is moved in the X-axis direction toward the spindle table, and the work is sandwiched between the spindle table and the tailstock. It is known that both roll support bases are moved inward in the Y-axis direction and moved in the X-axis direction, and the workpiece is formed by a roll pivotally supported on both roll support bases.
[0003]
In this case, a flat plate-like movable table that is long in the Y-axis direction is provided on the bed so as to be movable in the X-axis direction, and a pair of roll support tables are mounted on the movable table so as to be movable in the Y-axis direction. Each roll support base is moved in the Y-axis direction by a drive source attached to each end of the movable base in the Y-axis direction.
[0004]
[Problems to be solved by the invention]
When both roll support bases are moved inward in the Y-axis direction to cause the roll to bite into the workpiece, it is movable by a molding reaction force outward in the Y-axis direction that acts on the mounting portions of the drive sources at both ends of the movable base in the Y-axis direction. Further, when the two warp support tables are moved in the X-axis direction by the movement of the movable table and the work is rubbed by the roll, the movable table may be twisted by the forming reaction force in the X-axis direction. Also, in order to firmly hold the work between the headstock and the tailstock, it is necessary to press the tailstock toward the headstock with a strong force in the X-axis direction by a drive source mounted on the bed. As a result, the bed may be warped due to a large pressing reaction force outward in the X-axis direction on the mounting part of the headstock of the bed and the mounting part of the drive source of the tailstock. As described above, when the movable table is warped, twisted or the bed is warped, the relative positional accuracy between the work and the roller is deviated, and the work machining accuracy is deteriorated.
[0005]
In view of the above points, an object of the present invention is to provide a roll forming apparatus capable of improving the machining accuracy of a workpiece by preventing warping, twisting, and warping of a bed.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a headstock and a tailstock that are opposed to each other in the X-axis direction on the bed, with one of the two horizontal directions orthogonal to each other set as the X-axis direction and the other as the Y-axis direction. A pair of roll support bases facing each other in the Y-axis direction are arranged, and the work is sandwiched between the headstock and the tailstock by moving the tailstock in the X-axis direction toward the headstock. In a roll forming apparatus in which both roll support bases are moved inward in the Y-axis direction and moved in the X-axis direction to form a workpiece by a roll that is pivotally supported on both roll support bases, A roll support base is movably mounted in the Y-axis direction. A movable base that is long in the Y-axis direction is provided so as to be movable in the X-axis direction, and the movable base is connected to at least end walls at both ends in the Y-axis direction. Bottom wall and ceiling wall and the side connecting these bottom and ceiling walls Formed in a box shape with bets, each roll support stand on each end wall with mounting the drive source for moving the Y-axis direction, and a fixed block top and headstock upper bound via tie rods, sidewalls Is disposed on one surface of the movable table opposite to the direction in which the rolls squeeze, and an opening through which the tailstock passes is provided on the side wall, and both roll support tables are supported so as to be movable in the Y-axis direction. Yes.
[0007]
When both roll support bases are moved inward in the Y-axis direction to cause the rolls to bite into the workpiece, the forming reaction force outward in the Y-axis direction on the end wall of the movable base that is the mounting portion of the drive source for the roll support base However, the molding reaction force is equally received by the bottom wall and the ceiling wall of the movable table, and the bending moment due to the molding reaction force does not act on the entire movable table, and the movable table does not warp. Furthermore, the torsional rigidity of the movable table is increased by forming the movable table in a box shape. The X-axis direction acts when the rolls are moved to move both roll support tables in the X-axis direction and the workpiece is rubbed by the roll. The torsion of the movable table due to the molding reaction force is effectively prevented.
[0008]
It is desirable to attach a drive source for moving the pedestal in the X-axis direction to a fixed base on the bed, and to connect the upper part of the fixed base and the upper part of the main shaft base via a tie rod. The tie rod moves outward in the axial direction that acts on the fixed base and the headstock when the work is clamped between the headstock and the tailstock by pushing the tailstock in the axial direction by the drive source attached to the fixed base. Accordingly, the tie rod effectively prevents the bed from warping due to the pressing reaction force.
[0009]
By the way, it is conceivable that both roll support bases are supported on the bottom wall of the movable base so as to be movable in the Y-axis direction. The rotational moment in the X-axis direction acts on the roll support table, and the roll support base is easily tilted in the X-axis direction. On the other hand, if the movable base is provided with a side wall on one side in the X-axis direction and both roll support bases are movably supported on the side wall in the Y-axis direction, the molding reaction force in the X-axis direction is orthogonal to the line of action. Can be received by the side wall. Therefore, the rotational moment in the X-axis direction does not act on the roll support base, and the roll support base is prevented from tilting.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3, reference numeral 1 denotes a bed. On the bed 1, a headstock facing the X-axis direction with one of two horizontal directions orthogonal to each other as the X-axis direction and the other as the Y-axis direction 2 and the tailstock 3 are arranged, and a pair of roll support bases 4 and 4 facing in the Y-axis direction are arranged to roll the workpiece W sandwiched between the spindle stock 2 and the tailstock 3. A roll forming apparatus is formed in which forming is performed by rolls 4a and 4a pivotally supported on the support bases 4 and 4.
[0011]
The headstock 2 is fixed to the bed 1, while the tailstock 3 is movable in the X-axis direction along the two guide rails 5 on the bed 1. The tailstock 3 is moved in the X-axis direction by a drive source 7 comprising a hydraulic cylinder attached to 6.
[0012]
Spindles 2a and 3a are supported on the headstock 2 and the tailstock 3, respectively, and the spindle 2a of the headstock 2 is rotated by a spindle motor 8 on the bed 1 via a belt 8a. . As clearly shown in FIG. 4, a mandrel 2 b is attached to the tip of the spindle 2 a of the headstock 2, while a work presser 3 b is attached to the tip of the spindle 3 a of the tailstock 3. A set pin 2c that also serves as a knockout penetrating the spindle 2a and mandrel 2b of the headstock 2 is provided, and the work W that is fitted and set in the center hole of the set pin 2c is moved to the side of the headstock 2 of the tailstock 3 Thus, it is held between the mandrel 2b and the work presser 3b.
[0013]
In this case, it is necessary to press the tailstock 3 toward the headstock 2 with a strong force of 60 t by the drive source 7 in order to firmly hold the workpiece W and prevent the workpiece W from being displaced during the forming process. As a result, a large clamping reaction force outward in the X-axis direction acts on the headstock 2 and the fixed base 6, and the bed 1 may bend due to a bending moment due to the pressing reaction force. Therefore, in this embodiment, two Y-axis direction upper parts of the headstock 2 and two Y-axis direction upper parts of the fixed base 5 are coupled via two tie rods 9 and 9 arranged in parallel in the Y-axis direction. is doing. According to this, the clamping reaction force outwardly acting in the X-axis direction acting on the headstock 2 and the fixed table 5 is received and shared by the tie rod 9 positioned above the action line of the clamping reaction force. The acting bending moment is reduced and the warping of the bed 1 is effectively prevented.
[0014]
The two roll support bases 4 and 4 are mounted on the bed 1 so as to be movable in the Y-axis direction on a movable base 11 which is long in the Y-axis direction and supported by the four guide rails 10 on the bed 1 so as to be movable in the X-axis direction. The movable base 11, that is, both roll support bases 4 and 4 are moved in the X-axis direction via a feed screw mechanism 12 a by a drive source 12 comprising a servo motor attached to the bed 1.
[0015]
The movable base 11 is formed in a box shape having a bottom wall 11a supported by the guide rail 10, a ceiling wall 11b, end walls 11c and 11c at both ends in the Y-axis direction, and a side wall 11d on one side in the X-axis direction. ing. In this embodiment, the side walls 11d are provided in a pair on the side surface on the side of the tailstock 3 with the opening 11e in the center in the Y-axis direction, and the tip of the tailstock 3 passes through the opening 11e. The tie rod 9 is installed between the headstock 2 and the fixed base 6 through the opening 11e. Each roll support 4 is supported on each side wall 11d by three upper and lower guide rails 13 so as to be movable in the Y-axis direction. A feed screw mechanism is provided by a drive source 14 comprising a servo motor attached to each end wall 11c. Each roll support 4 is moved in the Y-axis direction.
[0016]
When forming the workpiece W, first, the tailstock 3 is moved in the X-axis direction toward the headstock 2, and the workpiece W is sandwiched between the mandrel 2b and the workpiece presser 3b as described above. Then, the spindle 2a is driven to rotate the workpiece W. Next, both roll support bases 4 and 4 are moved inward in the Y-axis direction, and the rolls 4a and 4a pivotally supported on both roll support bases 4 and 4 are placed on the peripheral surface of the work W from both sides in the Y-axis direction as shown in FIG. Encroach as shown by the solid line. Next, the movable base 11 is moved in the X-axis direction, the rolls 4a and 4a are used to squeeze the peripheral surface portion of the workpiece W toward the mandrel 2b, and the workpiece W is formed into the shape indicated by the phantom line in FIG. .
[0017]
Here, when the rolls 4 a and 4 a are bitten into the workpiece W, a molding reaction force acts outwardly in the Y-axis direction on the end walls 11 c and 11 c of the movable table 11. The wall 11a and the ceiling wall 11b are equally received. Therefore, the bending moment due to the Y-axis direction forming reaction force does not act on the movable table 11 as a whole, and the movable table 11 does not warp.
[0018]
Moreover, when the workpiece W is squeezed in the X-axis direction by the roll 4a, a molding reaction force in the X-axis direction acts on the roll support base 4, but the side wall 11d of the movable base 11 serving as a support portion of the roll support base 4 has an X-axis. Since it is orthogonal to the direction, the tilting moment due to the X-axis direction forming reaction force does not act on the roll support 4, and the roll support 4 is prevented from tilting. Furthermore, by forming the movable table 11 in a box shape, the torsional rigidity of the movable table 11 is increased, and the torsion of the movable table 11 due to the X-axis direction forming reaction force is effectively prevented. Further, the rotational moment about the Y axis acting on the movable table 11 by the X-axis direction forming reaction force is received by the guide rail 10 for the movable table 11. Thus, the relative position accuracy between the workpiece W and the roll 4a can be ensured, and the workpiece W can be formed with high accuracy.
[0019]
In the above embodiment, the mandrel 2b is attached only to the spindle 2a of the headstock 2. However, the mandrel is also attached to the spindle 3a of the tailstock 3, and the meat of the work W is placed on the headstock 2 side mandrel and tailstock. The present invention can be similarly applied to a forming process in which a three-side mandrel is squeezed out.
[0020]
【The invention's effect】
As is clear from the above description, according to the present invention, it is possible to prevent warping and twisting of the movable table due to molding reaction force, and also to prevent bed warpage due to workpiece clamping reaction force, and the relative position between the workpiece and the roll. It is possible to ensure accuracy and improve workpiece machining accuracy.
[Brief description of the drawings]
FIG. 1 is a plan view of an example of the apparatus of the present invention. FIG. 2 is a front view seen from the direction of arrow II in FIG. 1. FIG. 3 is a side view taken along line III-III in FIG. Figure [Explanation of symbols]
1 bed 2 spindle stock 3 tailstock 4 roll support base 4a roll 6 fixed base 7 tailstock drive source 9 tie rod 11 movable base 11a bottom wall 11b ceiling wall 11c end wall 11d side wall 14 roll support base drive source

Claims

A headstock and a tailstock that are opposed to each other in the X-axis direction are arranged on the bed, with one of the two horizontal directions orthogonal to each other set as the X-axis direction and the other as the Y-axis direction. Place a pair of roll support bases, move the tailstock toward the headstock in the X-axis direction, hold the workpiece between the headstock and the tailstock, and place both roll support bases in the Y-axis direction. In a roll forming apparatus that moves in the X direction and moves in the X axis direction, and forms the workpiece by a roll that is supported by both roll support bases, both roll support bases can be moved in the Y axis direction on the bed. A movable base that is long in the Y-axis direction is provided so as to be movable in the X-axis direction. The movable base is provided with at least end walls at both ends in the Y-axis direction, a bottom wall and a ceiling wall that connect these end walls, It formed in a box shape having a sidewall connecting the top wall, each end In each roll support stand with mounting the drive source for moving the Y-axis direction, the side wall, the roll is placed on one surface of the movable base in the direction opposite squeezing the workpiece, the side wall, opening tailstock passes And a roll forming apparatus characterized in that both roll support bases are movably supported in the Y-axis direction .

2. A roll according to claim 1, wherein a drive source for moving the tailstock in the X-axis direction is attached to a fixed base on the bed, and an upper part of the fixed base and an upper part of the headstock are coupled via a tie rod. Forming device.