JP4672609B2 - Drawing machine - Google Patents

Drawing machine Download PDF

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JP4672609B2
JP4672609B2 JP2006181594A JP2006181594A JP4672609B2 JP 4672609 B2 JP4672609 B2 JP 4672609B2 JP 2006181594 A JP2006181594 A JP 2006181594A JP 2006181594 A JP2006181594 A JP 2006181594A JP 4672609 B2 JP4672609 B2 JP 4672609B2
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holding mechanism
workpiece
central axis
piston shaft
clamp
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JP2008006490A (en
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忍 大見
真也 木村
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Nihon Spindle Manufacturing Co Ltd
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Nihon Spindle Manufacturing Co Ltd
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Description

本発明は、円筒状のワーク先端を縮管する絞り加工に使用される絞り加工装置に関し、特に、円筒状のワークの外径にバラツキがあっても、加工後の製品の寸法精度を高く維持することができる絞り加工装置に関するものである。 The present invention also relates a cylindrical workpiece tip drawing apparatus used in the drawing to the reduced pipe, in particular, the outer diameter of the cylindrical workpiece even if there are variations, high dimensional accuracy of the product after processing those related to the drawing device capable of maintaining.

従来、この種の絞り加工装置として、例えば、図６に示す、発明者等が先に提案した絞り加工装置がある（特許文献１参照）。
この絞り加工装置５０は、架体４上に主軸台５と保持台６とを配設し、主軸台５上に主軸機構２を固定するとともに、保持台６の走行レール６ａ上に主軸２０の軸芯方向に移動可能に配設したスライダー６ｂを介して、主軸２０と対向する位置に円筒状のワークＷを保持する保持機構７を配設するようにしている。
保持機構７は、円筒状のワークＷを把持固定する把持部材７１と、この把持部材７１を押圧するＬ字状の昇降枠７３に取り付けたシリンダ７２とを備え、昇降枠７３を主軸２０の軸芯方向と直角に移動可能となるように、スライダー６ｂ上に立設した支持台７４に配設したレール７４ａに取り付けるようにしている。
そして、絞り用工具Ｒを、主軸機構２の主軸２０の先端に取り付けた工具取付台２１に支持部材２２を介して半径方向に摺動可能に取り付ける。工具取付台２１の絞り用工具Ｒの半径方向への移行手段としては、工具取付台２１の内部に工具を半径方向に移行させるカム板を配備し、該カム板を主軸２０の内部に挿入するカム軸の先端に取り付けるとともに、主軸２０から差動歯車機構を介してカム軸に回転を伝動する構造が採用されている。
しかして、絞り加工に際しては、円筒状のワークＷを保持機構７の把持部材７１によって保持し、ワークＷの軸芯Ｍ’と主軸２０の軸芯Ｎとを昇降枠７３の移行によって一致させてから、スライダー６ｂを主軸２０の軸芯方向で工具取付台２１に向かって移動させることによってワークＷと主軸２０を軸芯方向に相対的に移動させつつ、絞り用工具Ｒを差動歯車機構によって主軸２０の軸芯に対して直角方向に移動させ、円筒状のワークＷの先端を縮管するようにしている。 Conventionally, as this type of drawing device, for example, there is a drawing device previously proposed by the inventors as shown in FIG. 6 (see Patent Document 1).
In this drawing device 50, a headstock 5 and a holding base 6 are arranged on the frame 4, the main spindle mechanism 2 is fixed on the mainhead base 5, and the main spindle 20 is placed on the traveling rail 6 a of the holding base 6. A holding mechanism 7 for holding the cylindrical workpiece W is arranged at a position facing the main shaft 20 via a slider 6b arranged to be movable in the axial direction.
The holding mechanism 7 includes a gripping member 71 that grips and fixes the cylindrical workpiece W and a cylinder 72 that is attached to an L-shaped lifting frame 73 that presses the gripping member 71, and the lifting frame 73 is the axis of the main shaft 20. It is attached to a rail 74a disposed on a support stand 74 standing on the slider 6b so as to be movable at right angles to the core direction.
Then, the drawing tool R is attached to a tool mounting base 21 attached to the tip of the spindle 20 of the spindle mechanism 2 via a support member 22 so as to be slidable in the radial direction. As a means for shifting the drawing tool R of the tool mount 21 in the radial direction, a cam plate for moving the tool in the radial direction is provided inside the tool mount 21 and the cam plate is inserted into the main shaft 20. A structure is employed in which rotation is transmitted from the main shaft 20 to the cam shaft via a differential gear mechanism while being attached to the tip of the cam shaft.
Thus, during the drawing process, the cylindrical workpiece W is held by the gripping member 71 of the holding mechanism 7, and the axis M ′ of the workpiece W and the axis N of the main shaft 20 are made to coincide with each other by the movement of the elevating frame 73. Then, the slider 6b is moved toward the tool mount 21 in the axial direction of the main shaft 20 to move the workpiece W and the main shaft 20 relatively in the axial direction, and the drawing tool R is moved by the differential gear mechanism. The tip of the cylindrical workpiece W is contracted by moving in a direction perpendicular to the axis of the main shaft 20.

ところで、この絞り加工装置５０は、保持機構７による円筒状のワークＷの保持方法として、シリンダ７２等を利用した押圧手段によって固定する方法を採用しているが、通常、加工に使用する円筒状のワークＷの外径にはバラツキがあるが、絞り加工における絞りローラの絞り量を決めるプログラムは一定のため、プログラムに外径の違いによる修正を行わない限り、円筒状のワークＷの外径のバラツキによって加工後の製品の寸法精度が低下するという問題があった。
この問題点を解消するために、取付前又は取付後に円筒状のワークＷの外径をノギス等の計測器具を用いて人手によって計測することも行われているが、計測の誤りや誤差が発生し、さらには、作業効率が低下するという問題があった。
特開２００４−９０９３号公報 By the way, this drawing apparatus 50 employs a method of fixing by a pressing means using a cylinder 72 or the like as a holding method of the cylindrical workpiece W by the holding mechanism 7, but usually a cylindrical shape used for processing. The outer diameter of the workpiece W varies, but since the program for determining the drawing amount of the drawing roller in the drawing process is constant, the outer diameter of the cylindrical workpiece W is not modified unless the program is modified due to the difference in outer diameter. There is a problem that the dimensional accuracy of the processed product is lowered due to the variation of the above.
In order to eliminate this problem, the outer diameter of the cylindrical workpiece W is manually measured using a measuring instrument such as a caliper before or after mounting, but measurement errors and errors occur. Furthermore, there is a problem that work efficiency is lowered.
JP 2004-9093 A

本発明は、上記従来の絞り加工装置の有する問題点に鑑み、円筒状のワークの外径にバラツキがあっても、加工後の製品の寸法精度を高く維持することができる絞り加工装置を提供することを目的とする。 The present invention is the light of the problems of the prior narrowing device, even if there are variations in the outer diameter of the cylindrical workpiece, providing a drawing device capable of maintaining a high dimensional accuracy of the product after processing The purpose is to do.

上記目的を達成するため、本発明の絞り加工装置は、円筒状のワークを保持する保持機構と、該保持機構に取り付けたワークに対して相対的に回転する絞り用工具とからなる絞り加工装置において、保持機構に、該保持機構の中心軸と直角方向に移動する複数のクランプ爪と、クランプ爪の移動距離を計測するための計測装置とを配設し、計測装置によって計測したクランプ爪の移動距離によって、ワークの直径を導出し、これに基づいて制御機構の加工用プログラムを選択又は補正するようにしたことを特徴とする。 In order to achieve the above object, a drawing apparatus according to the present invention comprises a holding mechanism that holds a cylindrical workpiece and a drawing tool that rotates relative to the workpiece attached to the holding mechanism. The holding mechanism is provided with a plurality of clamp claws that move in a direction perpendicular to the central axis of the holding mechanism, and a measuring device for measuring the movement distance of the clamp claws. The workpiece diameter is derived based on the movement distance, and the machining program for the control mechanism is selected or corrected based on the derived workpiece diameter .

この場合において、保持機構を、中空の本体と、該本体内を保持機構の中心軸と平行方向に摺動可能に配設した中空のピストン軸と、該ピストン軸の内面の傾斜部分に摺接する傾斜部分を形成したクランプ爪とから構成することができる。   In this case, the holding mechanism is in sliding contact with the hollow main body, the hollow piston shaft slidably disposed in the main body in a direction parallel to the central axis of the holding mechanism, and the inclined portion of the inner surface of the piston shaft. It can comprise from the clamp nail | claw which formed the inclination part.

本発明の絞り加工装置によれば、保持機構に、該保持機構の中心軸と直角方向に移動する複数のクランプ爪と、クランプ爪の移動距離を計測するための計測装置とを配設することにより、クランプ爪の移動距離から円筒状のワークの外径を導出することができる。
そして、計測したクランプ爪の移動距離によってワークの直径を導出し、これに基づいて制御機構の加工用プログラムを選択又は補正することにより、適正な加工用プログラムによって円筒状のワークの外径のバラツキに応じた加工を行うことによって、加工後の製品の寸法精度を高く維持することができる。 According to the drawing apparatus of the present invention, the holding mechanism is provided with a plurality of clamp claws that move in a direction perpendicular to the central axis of the holding mechanism, and a measuring device for measuring the movement distance of the clamp claws. Thus, the outer diameter of the cylindrical workpiece can be derived from the movement distance of the clamp claw.
Then, the workpiece diameter is derived from the measured movement distance of the clamp claw, and based on this, the machining program of the control mechanism is selected or corrected. By performing processing according to the above, it is possible to maintain high dimensional accuracy of the processed product.

また、保持機構を、中空の本体と、該本体内を保持機構の中心軸と平行方向に摺動可能に配設した中空のピストン軸と、該ピストン軸の内面の傾斜部分に摺接する傾斜部分を形成したクランプ爪とから構成することにより、簡便にクランプ爪の移動距離を演算し、円筒状のワークの外径を導出することができる。   In addition, the holding mechanism includes a hollow main body, a hollow piston shaft disposed inside the main body so as to be slidable in a direction parallel to the central axis of the holding mechanism, and an inclined portion that is in sliding contact with the inclined portion of the inner surface of the piston shaft. It is possible to simply calculate the movement distance of the clamp claw and derive the outer diameter of the cylindrical workpiece.

以下、本発明の絞り加工装置の実施の形態を、図面に基づいて説明する。 Embodiments of a drawing apparatus according to the present invention will be described below with reference to the drawings.

図１〜図５に、本発明の絞り加工装置の一実施例を示す。
この絞り加工装置１は、架体４上に主軸台５と保持台６とを配設し、主軸台５上に主軸機構２を固定するとともに、保持台６の走行レール６ａ上に主軸２０の軸芯方向に移動可能に配設したスライダー６ｂを介して、主軸２０と対向する位置に円筒状のワークＷを保持する保持機構３を配設するようにしている。
なお、従来例と同様、絞り用工具Ｒを配備した工具取付台２１を、回転する主軸２０の先端側に配設し、保持機構３を工具取付台２１に対向して配備する、所謂ワーク固定型の絞り加工装置のほか、保持機構を主軸先端側に配設し、これに対向して絞り用工具を配設したターレット台を配設する、所謂ワーク回転型の絞り加工装置にも適用することができる。 1 to 5 show an embodiment of the drawing apparatus of the present invention.
In this drawing apparatus 1, a headstock 5 and a holding base 6 are arranged on a frame 4, the main spindle mechanism 2 is fixed on the mainhead base 5, and the main spindle 20 is placed on a travel rail 6 a of the holding base 6. A holding mechanism 3 that holds the cylindrical workpiece W is disposed at a position facing the main shaft 20 via a slider 6b that is movably disposed in the axial direction.
As in the conventional example, the tool mounting base 21 on which the drawing tool R is disposed is disposed on the distal end side of the rotating spindle 20 and the holding mechanism 3 is disposed to face the tool mounting base 21 so-called workpiece fixing. In addition to a mold drawing device, the present invention is also applicable to a so-called workpiece rotation type drawing processing device in which a holding mechanism is arranged on the front end side of the spindle and a turret base is arranged opposite to the holding mechanism. be able to.

そして、この保持機構３は、円筒状のワークＷを把持する複数のクランプ爪３１を、保持機構３の中心軸Ｍと直角方向に移動可能に配設するもので、図２〜図４に示すように、中空の本体３５と、該本体３５内を保持機構３の中心軸Ｍと平行方向に摺動可能に配設する中空のピストン軸３２と、該ピストン軸３２の内面の傾斜部分３２ｂに摺接する傾斜部分３１ｂを形成するクランプ爪３１とを主要構成要素としている。   And this holding mechanism 3 arrange | positions the several clamp nail | claw 31 which hold | grips the cylindrical workpiece | work W so that a movement to the orthogonal | vertical direction with respect to the central axis M of the holding mechanism 3 is shown in FIGS. As described above, a hollow main body 35, a hollow piston shaft 32 slidably disposed in the main body 35 in a direction parallel to the central axis M of the holding mechanism 3, and an inclined portion 32 b on the inner surface of the piston shaft 32. A clamp claw 31 that forms an inclined portion 31b that is in sliding contact is a main component.

ピストン軸３２は、中空部分の内周面上に複数箇所（特に限定されるものではないが、本実施例においては、８箇所）にクランプ爪３１の傾斜部分３１ｂとその側面が摺接するＴ溝３２ｃを形成し、クランプ爪３１の保持（脱落防止）と、引き勝手の際に、クランプ爪３１の把持部分３１ａがワークＷから離間するようにしている。
そして、ピストン軸３２は、前部カバー３６ａ及び後部カバー３６ｂによって区画されたシリンダ室Ｃ１、Ｃ２に、本体３５に形成された油路３５ａ、３５ｂを介して導入される圧油の油圧力によって、本体３５内を保持機構３の中心軸Ｍと平行方向に移動するように構成している。 The piston shaft 32 has T-grooves in which the inclined portions 31b of the clamp claws 31 and the side surfaces thereof are in sliding contact with a plurality of locations (in the present embodiment, 8 locations are not particularly limited) on the inner peripheral surface of the hollow portion. 32c is formed so that the holding portion 31a of the clamp claw 31 is separated from the workpiece W when the clamp claw 31 is held (prevented from falling off) and pulled.
The piston shaft 32 is driven by the oil pressure of the pressure oil introduced into the cylinder chambers C1 and C2 defined by the front cover 36a and the rear cover 36b through the oil passages 35a and 35b formed in the main body 35. The inside of the main body 35 is configured to move in a direction parallel to the central axis M of the holding mechanism 3.

また、保持機構３には、クランプ爪３１が保持機構３の中心軸Ｍと直角方向に動く移動量を計測するための手段、特に限定されるものではないが、本実施例においては、電子スケールと、この電子スケールを読み取るためのスケールヘッド等からなる計測装置３７を配設するようにしている。
そして、この計測装置３７によって計測した移動量から、後述する円筒状のワークＷの外径を導出するようにしている。 The holding mechanism 3 is not limited to means for measuring the amount of movement of the clamp claw 31 moving in the direction perpendicular to the central axis M of the holding mechanism 3. In the present embodiment, the electronic scale In addition, a measuring device 37 including a scale head for reading the electronic scale is disposed.
Then, the outer diameter of a cylindrical workpiece W described later is derived from the movement amount measured by the measuring device 37.

この計測装置３７の配設位置は、本実施例においては、図１及び図３に示すように、ピストン軸３２の保持機構３の中心軸Ｍと平行方向への移動距離を計測することができる位置、具体的には、後部カバー３６ｂの側面に配設するようにしているが、これに限定されるものではなく、例えば、図３に２点鎖線で示す計測装置３７Ａのように、前部カバー３６ａに取り付けてクランプ爪３１の半径方向の移動距離を直接計測するようにすることもできる。
ここで、図１及び図３に示すように、ピストン軸３２の後部は保持機構３の本体３５よりも突出する構成としているため、計測装置３７をクランプ爪３１の移動量を直接計測することができる位置に配設する場合と比べてその取付が容易であり、特に、ワーク回転型の絞り加工装置の場合には、その構成上、ピストン軸３２の移動距離を計測することができる位置に配設することが好ましい。 In the present embodiment, as shown in FIGS. 1 and 3, the disposition position of the measuring device 37 can measure the movement distance of the piston shaft 32 in the direction parallel to the central axis M of the holding mechanism 3. The position, specifically, it is arranged on the side surface of the rear cover 36b. However, the present invention is not limited to this. For example, as shown in a measuring device 37A indicated by a two-dot chain line in FIG. It is also possible to directly measure the moving distance of the clamp claw 31 in the radial direction by attaching it to the cover 36a.
Here, as shown in FIGS. 1 and 3, since the rear portion of the piston shaft 32 protrudes from the main body 35 of the holding mechanism 3, the measuring device 37 can directly measure the movement amount of the clamp claw 31. The mounting is easier than the case where it is arranged at a position where it can be arranged, and in particular, in the case of a work rotation type drawing processing device, it is arranged at a position where the movement distance of the piston shaft 32 can be measured due to its configuration. It is preferable to install.

そして、ピストン軸３２を嵌入した本体３５には、ピストン軸３２の外周に形成したピストンＰの両側をシリンダ室Ｃ１、Ｃ２に区画する前部カバー３６ａと後部カバー３６ｂをボルト等の固定手段で取り付ける。   Then, a front cover 36a and a rear cover 36b that divide both sides of the piston P formed on the outer periphery of the piston shaft 32 into cylinder chambers C1 and C2 are attached to the main body 35 into which the piston shaft 32 is inserted by fixing means such as bolts. .

クランプ爪３１は、保持機構３の中心軸Ｍに対して半径方向の移動可能、より具体的には、周囲より接近、離間可能となるように、クランプ爪３１の前部に取り付けたストッパプレート３４が前部カバー３６ａに対して摺接するように、より具体的には、ストッパプレート３４をリング状のカバー３３と前部カバー３６ａとで挟み込むように構成している。   The clamp pawl 31 is movable in the radial direction with respect to the central axis M of the holding mechanism 3, more specifically, a stopper plate 34 attached to the front portion of the clamp pawl 31 so as to be closer to and away from the periphery. More specifically, the stopper plate 34 is sandwiched between the ring-shaped cover 33 and the front cover 36a so as to be in sliding contact with the front cover 36a.

クランプ爪３１は、その傾斜部分３１ｂがピストン軸３２の内面の傾斜部分３２ｂと摺接するようにしており、ピストン軸３２の保持機構３の中心軸Ｍと平行方向への移動によって、保持機構３の中心軸Ｍに対して直角方向に移動する。
クランプ爪３１が、保持機構３の中心軸Ｍに対し、周囲より接近していくことによってワークＷを保持するという、所謂ウェッジクランプ方式を採用しているため、保持後のワークＷの軸芯は保持機構３の中心軸Ｍと一致し、主軸２０の軸芯Ｎとの位置合わせは不要となる。 The clamp claw 31 has an inclined portion 31b in sliding contact with an inclined portion 32b on the inner surface of the piston shaft 32, and the movement of the piston shaft 32 in the direction parallel to the central axis M of the holding mechanism 3 It moves in a direction perpendicular to the central axis M.
Since the clamp claw 31 employs a so-called wedge clamp method in which the workpiece W is held by approaching the central axis M of the holding mechanism 3 from the periphery, the axis of the workpiece W after holding is The alignment with the central axis M of the holding mechanism 3 and the alignment with the axis N of the main shaft 20 become unnecessary.

次に、クランプ爪３１の保持機構３の中心軸Ｍに対する直角方向への移動距離を計測することによって導出するワークＷの外径計測の方法について説明する。
図５に示すように、保持機構３の初期位置におけるクランプ爪３１の把持部分３１ａが形成する円周の半径が、Ｄｍ／２（一定）で、半径がＤｎ／２（Ｄｎ＜Ｄｍ）のワークＷを取り付けるとき、クランプ爪３１の移動距離ｓは、ｓ＝（Ｄｍ−Ｄｎ）／２となる。
また、クランプ爪３１の移動距離ｓは、クランプ爪３１、ピストン軸３２の傾斜部分３１ｂ、３２ｂの傾斜角度がα（一定）であって、ピストン軸３２の保持機構３の中心軸Ｍと平行方向への移動距離がＬの場合、
ｓ＝Ｌ・ｔａｎα
で表される。
したがって、ワークＷの外径Ｄｎは、
Ｄｎ＝Ｄｍ−２・Ｌ・ｔａｎα
となる。 Next, a method for measuring the outer diameter of the workpiece W derived by measuring the movement distance of the clamp claw 31 in the direction perpendicular to the central axis M of the holding mechanism 3 will be described.
As shown in FIG. 5, a work piece having a radius of Dm / 2 (constant) and a radius of Dn / 2 (Dn <Dm) formed by the gripping portion 31 a of the clamp pawl 31 at the initial position of the holding mechanism 3. When W is attached, the moving distance s of the clamp pawl 31 is s = (Dm−Dn) / 2.
The moving distance s of the clamp pawl 31 is parallel to the central axis M of the holding mechanism 3 of the piston shaft 32 when the tilt angles of the clamp pawl 31 and the inclined portions 31b and 32b of the piston shaft 32 are α (constant). If the travel distance to is L,
s = L · tanα
It is represented by
Therefore, the outer diameter Dn of the workpiece W is
Dn = Dm−2 · L · tan α
It becomes.

このようにして、上記絞り加工装置１のピストン軸３２の保持機構３の中心軸Ｍと平行方向への移動距離Ｌを、計測装置３７によって計測し、計測した移動距離Ｌの値からワークＷの外径Ｄｎを演算し、ワークＷの外径Ｄｎの値に応じて、絞り用工具Ｒの主軸２０の軸芯Ｎ方向への移動と主軸２０の軸芯Ｎに対する直角方向への移動とを制御する制御機構（図示省略）の加工用プログラムを選択又は補正するようにしている。
この制御機構による制御は、例えば、ワークＷの外径が標準寸法よりも小さかった場合、絞り用工具Ｒの主軸２０の軸芯方向への移動を大きくなるようにプラグラムを補正するほか、計測したワーク外径に応じた加工用プログラムを予め多数記憶させておき、その中から最適な加工用プログラムを選択して実行するようにすることもできる。
これによって、素材である円筒状のワークＷの外径にバラツキがあった場合でも、加工後の製品の寸法精度を高く維持することができる。 In this way, the movement distance L in the direction parallel to the central axis M of the holding mechanism 3 of the piston shaft 32 of the drawing device 1 is measured by the measuring device 37, and the workpiece W is measured from the measured movement distance L. The outer diameter Dn is calculated, and the movement of the drawing tool R in the direction of the axis N and the movement of the spindle 20 in the direction perpendicular to the axis N are controlled according to the value of the outer diameter Dn of the workpiece W. A machining program for a control mechanism (not shown) is selected or corrected.
For example, when the outer diameter of the workpiece W is smaller than the standard dimension, the control by the control mechanism is measured in addition to correcting the program so that the movement of the drawing tool R in the axial direction of the spindle 20 is increased. A large number of machining programs corresponding to the workpiece outer diameter can be stored in advance, and an optimum machining program can be selected and executed.
Thereby, even when there is variation in the outer diameter of the cylindrical workpiece W, which is a material, the dimensional accuracy of the product after processing can be maintained high.

以上、本発明の絞り加工装置について、実施例に基づいて説明したが、本発明は上記実施例に記載した構成に限定されるものではなく、その趣旨を逸脱しない範囲において適宜その構成を変更することができるものである。 Above, with the drawing device of the present invention has been described with reference to examples, the present invention is not limited to the configuration described in the embodiment described above, appropriately changed its configuration without departing from the scope and spirit thereof Is something that can be done.

本発明の絞り加工装置は、円筒状のワークの外径にバラツキがあっても、加工後の製品の寸法精度を高く維持することができるという特性を有することから、製品の寸法精度を高く維持する必要のある製品の絞り加工を行う装置に好適に用いることができる。 Drawing apparatus of the present invention has the characteristic that even if there are variations in the outer diameter of the cylindrical workpiece, it is possible to maintain a high dimensional accuracy of the product after processing, maintain a high dimensional accuracy of the product Therefore, it can be suitably used for an apparatus that performs drawing processing of a product that needs to be performed.

本発明の絞り加工装置の一実施例を示す一部切り欠きの側面図である。It is a partially cutaway side view showing an embodiment of the drawing apparatus of the present invention. 同絞り加工装置に使用する保持機構の正面図である。It is a front view of the holding mechanism used for the drawing apparatus. 図２のＸ−Ｘ断面図である。It is XX sectional drawing of FIG. 保持機構のクランプ爪とピストン軸の関係を示す背面図である。It is a rear view which shows the relationship between the clamp nail | claw of a holding mechanism and a piston shaft. 保持機構によるワーク外径の計測方法を説明する一部断面の側面図で、（ａ）はワークの保持前を、（ｂ）はワーク保持後を示す。It is a side view of the partial cross section explaining the measuring method of the work outside diameter by a holding mechanism, (a) shows before holding a work, and (b) shows after holding a work. 従来の絞り加工装置を示す一部切り欠きの側面図である。It is a partially cutaway side view showing a conventional drawing apparatus.

１ 絞り加工装置
２ 主軸機構
２０ 主軸
２１ 工具取付台
３ 保持機構
３１ クランプ爪
３２ ピストン軸
３５ 本体
３５ａ 油路
３５ｂ 油路
３６ａ 前部カバー
３６ｂ 後部カバー
３７ 計測装置
３７Ａ 計測装置
Ｃ１ シリンダ室
Ｃ２ シリンダ室
Ｐ ピストン
Ｒ 絞り用工具
Ｗ ワーク DESCRIPTION OF SYMBOLS 1 Drawing apparatus 2 Main shaft mechanism 20 Main shaft 21 Tool mounting base 3 Holding mechanism 31 Clamping claw 32 Piston shaft 35 Main body 35a Oil passage 35b Oil passage 36a Front cover 36b Rear cover 37 Measuring device 37A Measuring device C1 Cylinder chamber C2 Cylinder chamber P Piston R Drawing tool W Workpiece

Claims (2)

円筒状のワークを保持する保持機構と、該保持機構に取り付けたワークに対して相対的に回転する絞り用工具とからなる絞り加工装置において、保持機構に、該保持機構の中心軸と直角方向に移動する複数のクランプ爪と、クランプ爪の移動距離を計測するための計測装置とを配設し、計測装置によって計測したクランプ爪の移動距離によって、ワークの直径を導出し、これに基づいて制御機構の加工用プログラムを選択又は補正するようにしたことを特徴とする絞り加工装置。 In a drawing apparatus comprising a holding mechanism that holds a cylindrical workpiece and a drawing tool that rotates relative to the workpiece attached to the holding mechanism, the holding mechanism has a direction perpendicular to the central axis of the holding mechanism. A plurality of clamp claws that are moved to and a measurement device for measuring the movement distance of the clamp claws, and the workpiece diameter is derived from the movement distance of the clamp claws measured by the measurement device. A drawing apparatus characterized by selecting or correcting a machining program for a control mechanism . 保持機構を、中空の本体と、該本体内を保持機構の中心軸と平行方向に摺動可能に配設した中空のピストン軸と、該ピストン軸の内面の傾斜部分に摺接する傾斜部分を形成したクランプ爪とから構成したことを特徴とする請求項１記載の絞り加工装置。   The holding mechanism is formed with a hollow main body, a hollow piston shaft disposed inside the main body so as to be slidable in a direction parallel to the central axis of the holding mechanism, and an inclined portion slidably contacting the inclined portion of the inner surface of the piston shaft. 2. The drawing device according to claim 1, wherein the drawing device comprises a clamped claw.
JP2006181594A 2006-06-30 2006-06-30 Drawing machine Expired - Fee Related JP4672609B2 (en)

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JPH11271007A (en) * 1998-03-23 1999-10-05 Honda Motor Co Ltd Method and apparatus for measurement of screw shaft
JP2002066669A (en) * 2000-08-25 2002-03-05 Asahi-Seiki Mfg Co Ltd Grasp detection device for work of transfer slide
JP2002172429A (en) * 2000-12-01 2002-06-18 Nippon Spindle Mfg Co Ltd Method and apparatus for forming cylindrically shaped material to be processed
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JPH0235606U (en) * 1988-08-26 1990-03-07
JPH10166306A (en) * 1996-12-13 1998-06-23 Taihei Mach Works Ltd Correction apparatus for positional dislocation of raw wood and grasping claw of raw-wood retaining mechanism
JPH11271007A (en) * 1998-03-23 1999-10-05 Honda Motor Co Ltd Method and apparatus for measurement of screw shaft
JP2002066669A (en) * 2000-08-25 2002-03-05 Asahi-Seiki Mfg Co Ltd Grasp detection device for work of transfer slide
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