JP2007069315A - Method for machining both ends of bar material and lathe - Google Patents

Method for machining both ends of bar material and lathe Download PDF

Info

Publication number
JP2007069315A
JP2007069315A JP2005259702A JP2005259702A JP2007069315A JP 2007069315 A JP2007069315 A JP 2007069315A JP 2005259702 A JP2005259702 A JP 2005259702A JP 2005259702 A JP2005259702 A JP 2005259702A JP 2007069315 A JP2007069315 A JP 2007069315A
Authority
JP
Japan
Prior art keywords
chuck
bar material
machining
main shaft
processing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2005259702A
Other languages
Japanese (ja)
Other versions
JP4722632B2 (en
Inventor
Satoru Takada
覚 高田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nakamura Tome Precision Industry Co Ltd
Original Assignee
Nakamura Tome Precision Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nakamura Tome Precision Industry Co Ltd filed Critical Nakamura Tome Precision Industry Co Ltd
Priority to JP2005259702A priority Critical patent/JP4722632B2/en
Publication of JP2007069315A publication Critical patent/JP2007069315A/en
Application granted granted Critical
Publication of JP4722632B2 publication Critical patent/JP4722632B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Turning (AREA)
  • Gripping On Spindles (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To improve machining accuracy in circularity and concentricity, etc. in machining when the machining is performed for only both ends of a bar material manufactured by drawing and rolling, in regard to a machining method when machining only both the ends of the bar material by a lathe, and the lathe machining the bar material by the machining method. <P>SOLUTION: The machining is performed for one end 3a and the other end 3b of the bar material 3 in a holding state of both of a holding position A when machining the one end 3a and a holding position B when machining the other end 3b. The lathe for machining a workpiece by the method is provided with a front end chuck 6 provided at the machining region side end of a spindle 1 and a rear chuck 7 provided on the extension of a rear end on a counter machining region 4 side. The interval of the front end chuck 6 and the rear chuck 7 is set so that a holding position of the rear chuck 7 may be a position held by the front end chuck 6 when machining the end 3b on the chuck side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、旋盤でバー材の両端のみを加工する際の加工方法及び当該方法でバー材を加工する旋盤に関するもので、両端の高精度加工を可能にした方法及び旋盤に関するものである。   The present invention relates to a processing method for processing only both ends of a bar material with a lathe and a lathe for processing the bar material by the method, and relates to a method and a lathe capable of high-precision processing at both ends.

ある程度の長さを有する伝動軸や支持軸で、その両端にのみ軸受やチェンスプロケットなどが装着される軸は、その両端にのみ機械加工が必要である。バー材を加工する旋盤は、軸心に貫通孔を有する中空主軸が用いられており、主軸に挿通したバー材の端部を加工領域に突出させ、主軸前端（加工領域側の端部）に装着したチャックで把持して加工を行う。   A transmission shaft or a support shaft having a certain length, and a shaft on which a bearing, a chain sprocket, or the like is mounted only at both ends, needs to be machined only at both ends. The lathe that processes the bar material uses a hollow main shaft with a through hole in the shaft center. The end of the bar material inserted through the main shaft protrudes into the processing region, and the main shaft front end (end on the processing region side) Gripping and processing with the attached chuck.

主軸が１本の旋盤でバー材の両端を加工するときは、一端を加工した後、バー材を主軸から引き抜いて前後反転した後、再び主軸に挿通して他端の加工を行う必要がある。一方、同一軸線上に２本の主軸を設けた２主軸対向旋盤を用いれば、バー材を前後反転させることなく、その両端の加工が可能である。   When machining both ends of a bar material with a single lathe, it is necessary to machine one end, then pull out the bar material from the main shaft and turn it back and forth, and then insert it into the main shaft again to machine the other end. . On the other hand, if a two-spindle opposed lathe having two spindles on the same axis is used, both ends of the bar material can be machined without reversing the bar material.

すなわち、図６の（ａ）ないし（ｄ）に示すように、バー材３を第１主軸１ａの貫通孔を通して、その一端３ａを加工領域５に突出させた状態で第１チャック６ａで把持し、当該一端３ａの加工を行う。次に第２主軸１ｂを第１主軸１ａに接近させて第２チャック６ｂでバー材３を掴み、第１チャック６ａを開いて第２主軸１ｂを後退させることにより、バー材３を第１主軸１から引き出す。必要があれば第１チャック６ａを閉じ、第２チャック６ｂを開いた状態で第２主軸１ｂを前進させ、第２チャック６ｂを閉じて第１チャック６ａを開いた状態で第２主軸１ｂを後退させるという引き出し動作を複数回行って、最終的にバー材の他端３ｂが第１チャック６ａの把持位置に来た時点で第２主軸１ｂを停止し、第２主軸１ｂを所定位置まで前進して、他端３ｂの加工長さを残した位置でバー材３を第２チャック６ｂで把持する。この状態で第１チャック６ａを開いて第２主軸１ｂを後退させれば、バー材３の他端３ｂが第２チャック６ｂで把持されて加工領域５に突出する状態となるから、当該他端３ｂに必要な加工を行う。加工済バー材は、第２主軸１ｂの貫通孔を通して排出する。
特開２００２‐３４６８０５号公報 That is, as shown in FIGS. 6A to 6D, the bar member 3 is held by the first chuck 6a through the through hole of the first main shaft 1a and the one end 3a protruding into the processing region 5. Then, the one end 3a is processed. Next, the second spindle 1b is moved closer to the first spindle 1a, the bar material 3 is gripped by the second chuck 6b, the first chuck 6a is opened and the second spindle 1b is retracted, whereby the bar material 3 is moved to the first spindle. Pull out from 1. If necessary, the first main spindle 1b is advanced with the first chuck 6a closed, the second chuck 6b opened, and the second main spindle 1b retracted with the second chuck 6b closed and the first chuck 6a opened. When the other end 3b of the bar material finally reaches the gripping position of the first chuck 6a, the second spindle 1b is stopped and the second spindle 1b is advanced to a predetermined position. Then, the bar material 3 is gripped by the second chuck 6b at a position where the processing length of the other end 3b remains. In this state, if the first chuck 6a is opened and the second main shaft 1b is retracted, the other end 3b of the bar member 3 is held by the second chuck 6b and protrudes into the processing region 5. Processing required for 3b is performed. The processed bar material is discharged through the through hole of the second main shaft 1b.
JP 2002-346805 A

バー材の両端加工においては、その一端を加工するときと、他端を加工するときとの把持位置の相違や、バー材が持っている反りや曲り及びこの反りや曲りに起因する加工回転中の振動により、加工端に真円度や同心度の誤差が生ずる。特に加工するバー材の長さが長くなると、バー材に残っている反りや曲り及びこれらに起因する加工回転中のバー材の振動による加工誤差が増大してくるという問題がある。   In both-end processing of bar material, the difference in gripping position between when one end is processed and when the other end is processed, warpage and bending of the bar material, and processing rotation caused by this warpage and bending Due to this vibration, roundness and concentricity errors occur at the machining end. In particular, when the length of the bar material to be processed becomes long, there is a problem that the processing error due to the warp and bending remaining in the bar material and the vibration of the bar material during processing rotation due to these increases.

更に両端加工軸を伝動軸や支持軸として使用している各種の機械装置、例えばエスカレータや動く歩道などの大型化、静粛化、高速化などに伴って、バー材の両端加工に高い精度が要求されるようになってきている。   Furthermore, high precision is required for both-end machining of bar materials due to the increase in size, quietness, and speed of various machinery and equipment that use both-end machining axes as transmission shafts and support shafts, such as escalators and moving walkways. It has come to be.

そこでこの発明は、引き抜きや圧延によって製造されたバー材の両端にのみ機械加工を施す場合の当該機械加工の真円度や同心度などの加工精度を向上させる技術手段を得ることを課題としている。   Therefore, the present invention has an object to obtain technical means for improving processing accuracy such as roundness and concentricity of the machining when machining is performed only on both ends of the bar material manufactured by drawing or rolling. .

この発明では、バー材３の一端３ａを加工するときの把持位置Ａと、他端３ｂを加工するときの把持位置Ｂとの両位置Ａ、Ｂを把持した状態で、当該一端及び他端を機械加工することにより、上記課題を解決している。すなわち、この発明の加工方法では、バー材３の一端３ａを加工するときも、他端３ｂを加工するときも共に当該一端及び他端近傍の２箇所Ａ、Ｂでワークを把持して加工を行っている。   In this invention, the gripping position A when processing the one end 3a of the bar member 3 and the gripping position B when processing the other end 3b are gripped at both positions A and B, and the one end and the other end are held. The above problems are solved by machining. That is, in the processing method of the present invention, both when processing the one end 3a of the bar member 3 and when processing the other end 3b, the workpiece is gripped at two locations A and B near the one end and the other end. Is going.

上記方法で加工を行うのに用いるこの発明の旋盤は、バー材３の一端３ａに近い箇所Ａ及び他端３ｂに近い箇所Ｂとの２箇所Ａ、Ｂを同時に把持できるように主軸１の加工領域５側端部に設けた前端チャック６と、主軸１の反加工領域４側の後端延長上に設けた後部チャック７とを備えている。後部チャック７の把持位置を、当該チャック側の端部３ｂを加工するときに前端チャック６が把持する位置となるように、前端チャック６と後部チャック７の間隔を設定することにより、最も高い加工精度を実現することができる。後部チャック７の把持位置が上記の最適位置より大きく離れると加工誤差が増大してくるので、加工するバー材の長さが大きく異なるときは、後部チャック７の把持位置を変更するのが好ましい。これを実現するためには、後部チャック７を交換ないし装脱可能な延長部材３６、３７、４０、４１を介して取付けるのがよい。   The lathe according to the present invention used for machining by the above method is capable of machining the spindle 1 so that two places A and B of the bar material 3 can be grasped simultaneously with the place A near the one end 3a and the place B near the other end 3b. A front end chuck 6 provided at the end portion on the region 5 side and a rear chuck 7 provided on the rear end extension of the main shaft 1 on the side opposite to the processing region 4 are provided. By setting the distance between the front chuck 6 and the rear chuck 7 so that the grip position of the rear chuck 7 is the position that the front chuck 6 grips when processing the end 3b on the chuck side, the highest machining is achieved. Accuracy can be achieved. Since the processing error increases when the grip position of the rear chuck 7 is far away from the optimum position, it is preferable to change the grip position of the rear chuck 7 when the length of the bar material to be processed differs greatly. In order to realize this, it is preferable to attach the rear chuck 7 via extension members 36, 37, 40, 41 that can be exchanged or removed.

２主軸対向旋盤の場合には、２主軸共に前端チャック６ａ、６ｂと後部チャック７ａ、７ｂとを設ける。このときの前端チャックの把持位置と後部チャックの把持位置との間隔は、両主軸共に同じ間隔である。   In the case of a two-spindle opposed lathe, front end chucks 6a and 6b and rear chucks 7a and 7b are provided for the two spindles. The distance between the gripping position of the front end chuck and the gripping position of the rear chuck at this time is the same for both spindles.

後部チャック７としては、小型で回転慣性を小さくできること、およびユニット化が容易であることから、主軸方向に往復移動する開閉スリーブ１７で開閉されるコレットチャックが適している。前端チャック６は、主軸にチャックシリンダを２個設けてその１個で開閉するようにしてもよいが、公知のフロントドライブチャックを用いることにより、主軸構造を単純化できる。   As the rear chuck 7, a collet chuck that is opened and closed by an open / close sleeve 17 that reciprocates in the main axis direction is suitable because it is small in size, can reduce rotational inertia, and can be easily unitized. The front end chuck 6 may be provided with two chuck cylinders provided on the main shaft and opened and closed by one, but the main shaft structure can be simplified by using a known front drive chuck.

本願の請求項１の発明に係る旋盤は、上記のこの発明の方法でバー材を加工するのに用いる旋盤であって、バー材３を挿通可能な貫通孔を有する中空主軸１を備え、当該主軸は挿通されたバー材の加工端側を把持する前端チャック６を備えている旋盤において、当該主軸の後端に装着されて前記バー材の反加工端側を把持する後部チャックユニット８を備えていることを特徴とするものである。   A lathe according to the invention of claim 1 of the present application is a lathe used for processing a bar material by the method of the present invention described above, and includes a hollow main shaft 1 having a through-hole through which the bar material 3 can be inserted. In a lathe having a front end chuck 6 for gripping the processed end side of the inserted bar material, the main shaft is provided with a rear chuck unit 8 attached to the rear end of the main shaft and gripping the counter-processed end side of the bar material. It is characterized by that.

本願の請求項２の発明は、上記手段を備えた旋盤において、前記後部チャックユニットの後部チャック７は、交換ないし着脱可能な延長部材３６、３７、４０、４１を介して主軸後端に連結されていることを特徴とするものである。   According to a second aspect of the present invention, in the lathe provided with the above means, the rear chuck 7 of the rear chuck unit is connected to the rear end of the main shaft via extension members 36, 37, 40, and 41 that can be replaced or removed. It is characterized by that.

本願の請求項３の発明は、２主軸対向旋盤で、バー材の両端加工をする方法であって、主軸の前端チャック６と後部チャック７との間隔が、両端部を加工しようとするバー材３の一方の端部３ａを加工するときのワーク把持位置と他方の端部３ｂを加工するときのワーク把持位置との両把持位置の間隔に略等しい間隔となるように、第１及び第２主軸１ａ、１ｂに前記後部チャック７ａ、７ｂを装着し、前記バー材を第１主軸１ａの貫通孔に挿通してその一方の端部３ａを加工領域５に突出させ、第１主軸の前端チャック６ａと後部チャック７ａで当該バー材を把持して前記一方の端部の加工を行い、次に前記バー材を第２主軸１ｂの貫通孔に挿通してその他方の端部３ｂを加工領域５に突出させ、第２主軸の前端チャック６ｂと後部チャックで当該バー材を把持して前記他方の端部の加工を行い、第２主軸の貫通孔を通して加工済バー材を排出する、バー材の両端加工方法である。   The invention of claim 3 of the present application is a method for processing both ends of a bar material on a two-spindle opposed lathe, and the interval between the front end chuck 6 and the rear chuck 7 of the main shaft is a bar material to be processed at both ends. The first and second intervals are substantially equal to the interval between both the gripping positions of the workpiece gripping position when processing one end portion 3a of the workpiece 3 and the workpiece gripping position when processing the other end portion 3b. The rear chucks 7a and 7b are mounted on the main shafts 1a and 1b, the bar member is inserted into the through hole of the first main shaft 1a, and one end portion 3a thereof protrudes into the machining region 5, thereby the front end chuck of the first main shaft. The bar material is gripped by 6a and the rear chuck 7a to process the one end portion, and then the bar material is inserted into the through hole of the second main shaft 1b to connect the other end portion 3b to the processing region 5. To the front chuck 6b of the second spindle and the rear chuck. In grips the bar member performs processing of the other end, discharges the processed bar member through the through hole of the second spindle, which is opposite ends processing method of the bar material.

この発明の方法によれば、バー材の一端及び他端を加工するときに、バー材が共に２箇所で支持されるため、バー材の反りや曲りに起因する加工回転中のバー材の振動が防止され、振動に起因する加工誤差の増大を防止できる。また、バー材の一端及び他端を加工するとき、その反対側の端部の加工を行うときの前端チャックでの把持位置近くを後部チャックで把持した状態で加工が行われるので、一端を加工するときと他端を加工するときとのバー材の姿勢が同じになるため、ワークの姿勢の違いによる加工誤差の発生を防止でき、特に両端の加工部の同心度を向上させることができる。   According to the method of the present invention, when the one end and the other end of the bar material are processed, the bar material is supported at two locations, so the vibration of the bar material during processing rotation caused by the warpage or bending of the bar material. Can be prevented, and an increase in machining error due to vibration can be prevented. Also, when processing one end and the other end of the bar material, the processing is performed with the rear chuck gripping the vicinity of the grip position at the front end chuck when processing the opposite end, so one end is processed Since the posture of the bar material is the same when the other end is machined, the occurrence of machining errors due to the difference in workpiece posture can be prevented, and in particular, the concentricity of the machined portions at both ends can be improved.

以上のことから、この発明によれば、バー材の両端加工、特にバー材が長いときの両端加工時の加工精度を向上させることができるという効果がある。   From the above, according to the present invention, there is an effect that it is possible to improve the processing accuracy at the both end processing of the bar material, particularly at the both end processing when the bar material is long.

以下、図面を参照してこの発明の好ましい実施形態について説明する。図１はこの発明に係る旋盤の主軸構造、図２は後部チャックユニットとその開閉構造を示した断面図である。図中、１は主軸、６はその加工領域５側端部に装着された前端チャック、８は主軸１の後端に装着された後部チャックユニットである。   Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a main spindle structure of a lathe according to the present invention, and FIG. 2 is a sectional view showing a rear chuck unit and its opening / closing structure. In the figure, 1 is a main shaft, 6 is a front end chuck attached to the end of the machining region 5 side, and 8 is a rear chuck unit attached to the rear end of the main shaft 1.

主軸１は、軸方向の貫通孔９を有する中空主軸で、主軸台１０に軸受１１、１２で軸支されている。前端チャック６は、空気圧で爪１３を開き、当該空気圧を開放したときに、ばね１４で爪が閉じてワークを把持する構造の、公知のフロントドライブチャックである。   The main shaft 1 is a hollow main shaft having an axial through hole 9 and is supported by a main shaft base 10 with bearings 11 and 12. The front end chuck 6 is a known front drive chuck having a structure in which the claw 13 is opened by air pressure, and when the air pressure is released, the claw is closed by the spring 14 to grip the workpiece.

後部チャックユニット８（図２参照）は、コレット爪１５と、これを開閉する円錐面１６を備えた開閉スリーブ１７と、この開閉スリーブを軸方向往復動するチャックシリンダ１８と、このチャックシリンダに作動油を供給する給油ブロック１９とを備えている。後部チャックユニット８は、バー材を挿通する貫通孔２０を備えており、主軸１の後端に取り付けた取付フランジ２１にボルト２２で固定されている。   The rear chuck unit 8 (refer to FIG. 2) includes a collet claw 15, an opening / closing sleeve 17 having a conical surface 16 for opening and closing the same, a chuck cylinder 18 for reciprocating the opening / closing sleeve in an axial direction, and an operation for the chuck cylinder. And an oil supply block 19 for supplying oil. The rear chuck unit 8 includes a through hole 20 through which the bar material is inserted, and is fixed to a mounting flange 21 attached to the rear end of the main shaft 1 with a bolt 22.

チャックシリンダのピストン２３は、円筒状のピストンロッド２４を備えており、その後端内周側に開閉スリーブ１７の基端が螺着されている。ピストン２３には、ピストンロッド２４を主軸１と同期回転させる回り止めピン２５が設けられている。ピストン２３が図で右動すると、開閉スリーブ１７が右動し、それに設けた左すぼまりの円錐面１６が右動することにより、コレット爪１５を縮径させて貫通孔２０に挿通されているバー材３を把持する。   The piston 23 of the chuck cylinder includes a cylindrical piston rod 24, and the base end of the opening / closing sleeve 17 is screwed to the inner peripheral side of the rear end. The piston 23 is provided with a detent pin 25 that rotates the piston rod 24 synchronously with the main shaft 1. When the piston 23 moves to the right in the figure, the opening / closing sleeve 17 moves to the right, and the conical surface 16 of the left constriction provided thereon moves to the right, thereby reducing the diameter of the collet claw 15 and being inserted into the through hole 20. The bar material 3 is gripped.

チャックシリンダ１８のシリンダ筒１８ａに固定したシリンダ蓋２６は、円筒状のピストンロッド２４の外周を案内するガイド筒２７を備えており、このガイド筒の先端には、油切円板２８、摺動リング２９を介してコレット爪１５の基部が固定され、更にエンドブロック３０が固定されており、これらは主軸１と共に回転する。   The cylinder lid 26 fixed to the cylinder cylinder 18a of the chuck cylinder 18 is provided with a guide cylinder 27 for guiding the outer circumference of the cylindrical piston rod 24. A base portion of the collet claw 15 is fixed via a ring 29, and an end block 30 is fixed, and these rotate together with the main shaft 1.

ガイド筒２７には、球軸受３１、３１で給油ブロック１９がフローティング状態で支持されており、更にこの給油ブロックを包囲するように、不動ケーシング３３が設けられている。不動ケーシング３３は、図示しないブラケットを介して主軸台１０に支持されており、前記ガイド筒２７及び摺動リング２９の外周との間で主軸１の回転から切り離されている。   The guide cylinder 27 supports the oil supply block 19 in a floating state by ball bearings 31, 31, and is further provided with a stationary casing 33 so as to surround the oil supply block. The stationary casing 33 is supported by the headstock 10 via a bracket (not shown), and is separated from the rotation of the main shaft 1 between the guide cylinder 27 and the outer periphery of the sliding ring 29.

給油ブロック１９は、これに接続された給油パイプで回転を止められており、ガイド筒２７との回転摺接面に設けた周溝及びガイド筒に設けた軸方向の通孔３４、３５を通してピストン２３の両側に作動油が供給されるようになっている。   The oil supply block 19 is stopped from rotating by an oil supply pipe connected to the oil supply block 19, and is connected to a piston through a circumferential groove provided in a rotational sliding contact surface with the guide cylinder 27 and axial through holes 34 and 35 provided in the guide cylinder. The hydraulic oil is supplied to both sides of 23.

図３は、図２の構造の後部チャックユニット８に延長ロッド３６と延長ガイド３７とを設けて、コレット爪１７による把持位置Ｂと前端チャック６の把持位置Ａとの間隔を拡げた構造を示した断面図である。図３に示すように、開閉スリーブを螺着するため（図２参照）にピストンロッド２４の後端内周に設けたねじ３８に中空状の延長ロッド３６の基端を螺着し、この延長ロッドの後端にピストンロッド２４の後端内周に設けたと同様なねじ３８を設けて、当該ねじにコレットチャックの開閉スリーブ１７を螺着する。また、ガイド筒２７の先端からコレット爪１７とエンドブロック３０を外し、接続フランジ３９を取り付けて、当該接続フランジを介して延長ロッド３６の外周をガイドする延長ガイド３７を固定し、この延長ガイドの先端にコレット爪１５の基端を固定すると共に、当該コレット爪の基端にエンドブロック３０を固定している。   FIG. 3 shows a structure in which an extension rod 36 and an extension guide 37 are provided in the rear chuck unit 8 of the structure of FIG. 2 to increase the distance between the gripping position B by the collet claw 17 and the gripping position A of the front end chuck 6. FIG. As shown in FIG. 3, in order to screw the opening / closing sleeve (see FIG. 2), the base end of the hollow extension rod 36 is screwed to the screw 38 provided on the inner periphery of the rear end of the piston rod 24, and this extension is performed. A screw 38 similar to that provided on the inner periphery of the rear end of the piston rod 24 is provided at the rear end of the rod, and the collet chuck opening / closing sleeve 17 is screwed to the screw. Further, the collet claw 17 and the end block 30 are removed from the tip of the guide tube 27, a connection flange 39 is attached, and an extension guide 37 that guides the outer periphery of the extension rod 36 through the connection flange is fixed. While fixing the base end of the collet nail | claw 15 to the front-end | tip, the end block 30 is being fixed to the base end of the said collet nail | claw.

図３の延長部材３６、３７は、ワークの後部把持位置Ｂを主軸の後方延長上に設定するものであるが、図４に示すように、主軸の中空孔内に挿入される延長部材４０、４１を用いて、コレット爪１７による把持位置Ｂと前端チャック６の把持位置Ａとの間隔を狭めることもできる。すなわち、ピストンロッド２４の後端内周に設けたねじ３８に主軸の中空孔に挿入される中空状の延長ロッド４０の基端を螺着し、この延長ロッドの前端に設けたねじ３８にコレットチャックの開閉スリーブ１７を螺着する。また、ガイド筒２７の先端とエンドブロック３０との間に、延長ロッド４０の内周に挿入される延長ガイド４１の基端を固定し、この延長ガイドの先端にコレット爪１５を固定する。   The extension members 36 and 37 in FIG. 3 set the rear gripping position B of the workpiece on the rearward extension of the main shaft, but as shown in FIG. 4, the extension members 40 inserted into the hollow holes of the main shaft, 41, the interval between the gripping position B by the collet claw 17 and the gripping position A of the front end chuck 6 can be narrowed. That is, the base end of the hollow extension rod 40 inserted into the hollow hole of the main shaft is screwed to the screw 38 provided at the inner periphery of the rear end of the piston rod 24, and the collet is attached to the screw 38 provided at the front end of the extension rod. The opening / closing sleeve 17 of the chuck is screwed. Further, the base end of the extension guide 41 inserted into the inner periphery of the extension rod 40 is fixed between the tip of the guide tube 27 and the end block 30, and the collet claw 15 is fixed to the tip of the extension guide.

加工しようとするバー材３の前後の把持箇所Ａ、Ｂの間隔に合せて、それに対応する長さの延長ロッド３６、４０と延長ガイド３７、４１を設けてやれば、これらを交換ないし装脱することで、全体長さや端部の加工長さが異なる種々のバー材を適切な２箇所で把持することが可能になる。   If extension rods 36 and 40 and extension guides 37 and 41 having a corresponding length are provided in accordance with the interval between the gripping portions A and B before and after the bar material 3 to be processed, they can be exchanged or detached. By doing so, it becomes possible to grip various bar materials having different overall lengths and processing lengths at the end portions at appropriate two locations.

以上説明したような後部チャックユニット８を主軸１の後端に装着し、加工しようとするバー材を主軸１及び後部チャックユニット８に設けた貫通孔９、２０を通して挿入して、その加工端を加工領域５に突出させ、前端チャック６及び後部チャック７を閉じて、バー材の２箇所を把持した状態で主軸１を回転させて、前端チャック６から突出している部分の加工を行う。バー材３の反対側の端部を加工するときも同様である。   The rear chuck unit 8 as described above is attached to the rear end of the main shaft 1, and the bar material to be processed is inserted through the through holes 9 and 20 provided in the main shaft 1 and the rear chuck unit 8, and the processed end is inserted. The projecting area 5 is projected, the front end chuck 6 and the rear chuck 7 are closed, and the main shaft 1 is rotated in a state where two portions of the bar material are gripped, so that the portion projecting from the front end chuck 6 is processed. The same applies when processing the opposite end of the bar material 3.

バー材の両端を２主軸対向旋盤で加工するときは、対向する両主軸の後端に共に後部チャックユニット８を装着する。第１主軸と第２主軸とが同じ長さであれば、同じ後部チャックユニットを装着してやればよいが、異なるときは後部チャックの把持位置をずらしたチャックユニットを装着して、両主軸における前端チャックの把持位置と後部チャックの把持位置との間隔が等しい間隔になるようにする。   When machining both ends of the bar material with a two-spindle opposed lathe, the rear chuck unit 8 is attached to the rear ends of both opposed spindles. If the first main shaft and the second main shaft are the same length, the same rear chuck unit may be mounted, but if they are different, a chuck unit in which the grip position of the rear chuck is shifted is mounted, and the front end chuck on both main shafts The distance between the grip position and the grip position of the rear chuck is made equal.

次に図５を参照して、第１主軸１ａと第２主軸１ｂとに後部チャックユニット８を装着した２主軸対向旋盤を用いて、この発明の方法でバー材３の両端加工を行う手順を説明する。   Next, referring to FIG. 5, a procedure for performing both-end machining of the bar material 3 by the method of the present invention using a two-spindle opposed lathe in which the rear chuck unit 8 is mounted on the first spindle 1a and the second spindle 1b. explain.

第１前端チャック６ａ及び第１後部チャック７ａを開いた状態で、バー材３を第１主軸１ａの貫通孔を通してその一端３ａを加工領域５に突出させ、第１前端チャック６ａと第１後部チャック７ａとを閉じてバー材３の前部と後部の２箇所を把持し、当該一端３ａの加工を行う。次に第１後部チャックを開き、第２主軸１ｂを第１主軸１ａに接近させて第２前端チャック６ｂでバー材３を掴み、第１前端チャック６ａを開いて第２主軸１ｂを後退させることにより、バー材３を第１主軸１ａから引き出す。必要があれば第１前端チャック６ａを閉じ、第２前端チャック６ｂを開いた状態で第２主軸１ｂを前進させ、第２前端チャック６ｂを閉じて第１前端チャック６ａを開いた状態で第２主軸１ｂを後退させるという引き出し動作を複数回行って、最終的にバー材の他端３ｂが第１前端チャック６ａの把持位置に来た時点で第２主軸１ｂを停止し、第２主軸１ｂを所定位置まで前進して、他端３ｂの加工長さを残した位置でバー材３を第２前端チャック６ｂで把持する。この状態で第１前端チャック６ａを開いて第２主軸１ｂを後退させれば、バー材３の他端３ｂが第２前端チャック６ｂで把持されて加工領域５に突出する状態となるから、第２後部チャック７ｂを閉じてバー材３を２箇所で把持した後、当該他端３ｂに必要な加工を行う。加工済バー材は、第２主軸１ｂの貫通孔を通して排出する。   With the first front end chuck 6a and the first rear chuck 7a opened, the bar 3 is protruded through the through hole of the first main shaft 1a into the processing region 5 so that the first front end chuck 6a and the first rear chuck 7a is closed, the front part and the rear part of the bar material 3 are gripped, and the one end 3a is processed. Next, the first rear chuck is opened, the second main shaft 1b is brought close to the first main shaft 1a, the bar material 3 is gripped by the second front end chuck 6b, and the first front end chuck 6a is opened to retract the second main shaft 1b. Thus, the bar material 3 is pulled out from the first main shaft 1a. If necessary, the first front end chuck 6a is closed, the second front end chuck 6b is opened, the second main shaft 1b is advanced, the second front end chuck 6b is closed, and the first front end chuck 6a is opened. The pull-out operation of retreating the main shaft 1b is performed a plurality of times, and when the other end 3b of the bar material finally reaches the gripping position of the first front end chuck 6a, the second main shaft 1b is stopped and the second main shaft 1b is moved. The bar material 3 is gripped by the second front end chuck 6b at a position that advances to a predetermined position and leaves the machining length of the other end 3b. If the first front end chuck 6a is opened in this state and the second main spindle 1b is retracted, the other end 3b of the bar member 3 is gripped by the second front end chuck 6b and protrudes into the processing region 5. 2 After the rear chuck 7b is closed and the bar 3 is gripped at two locations, the other end 3b is processed. The processed bar material is discharged through the through hole of the second main shaft 1b.

この発明の旋盤の主軸構造を示した断面図Sectional drawing which showed the spindle structure of the lathe of this invention 後部チャックユニットを装着した旋盤の主軸の断面図Cross section of the main spindle of a lathe equipped with a rear chuck unit 後部チャックの把持位置を図２より反加工領域側へ変更した後部チャックユニットの断面図Sectional view of the rear chuck unit in which the gripping position of the rear chuck is changed to the counter machining area side from FIG. 後部チャックの把持位置を図２より加工領域側へ変更した後部チャックユニットの断面図Sectional view of the rear chuck unit in which the grip position of the rear chuck is changed to the processing region side from FIG. ２主軸対向旋盤によるこの発明の両端加工方法を示す説明図Explanatory drawing which shows the both-ends processing method of this invention by a 2 spindle opposing lathe 従来の２主軸対向旋盤によるバー材の両端加工方法を示す説明図Explanatory drawing which shows the both-ends processing method of the bar material by the conventional 2 spindle facing lathe

符号の説明Explanation of symbols

1a 第１主軸
1b 第２主軸
３ バー材
５ 加工領域
6a 前端チャック
6b 第２前端チャック
7a 後部チャック
7b 第２後部チャック
８ 後部チャックユニット
36,40 延長ロッド
37,41 延長ガイド 1a 1st spindle
1b 2nd spindle 3 Bar material 5 Machining area
6a Front end chuck
6b Second front end chuck
7a Rear chuck
7b Second rear chuck 8 Rear chuck unit
36,40 Extension rod
37,41 Extension guide

Claims (3)

バー材(3)を挿通可能な貫通孔を有する中空主軸(1)を備え、当該主軸は挿通されたバー材の加工端側を把持する前端チャック(6)を備えている旋盤において、当該主軸の後端に装着されて前記バー材の反加工端側を把持する後部チャックユニット(8)を備えている、旋盤。   In a lathe provided with a hollow main shaft (1) having a through-hole through which a bar material (3) can be inserted, and the main shaft includes a front end chuck (6) for gripping the processing end side of the inserted bar material, the main shaft A lathe comprising a rear chuck unit (8) attached to the rear end and gripping the counter-machined end side of the bar material. 前記後部チャックユニットの後部チャック(7)は、交換ないし着脱可能な延長部材(36,37,40,41)を介して主軸後端に連結されている、請求項１記載の旋盤。   The lathe according to claim 1, wherein the rear chuck (7) of the rear chuck unit is connected to the rear end of the main shaft via a replaceable or removable extension member (36, 37, 40, 41). 主軸の前端チャック(6)と後部チャック(7)との間隔が、両端部を加工しようとするバー材(3)の一方の端部(3a)を加工するときのワーク把持位置と他方の端部(3b)を加工するときのワーク把持位置との両把持位置の間隔に略等しい間隔となるように、第１及び第２主軸(1a,1b)に前記後部チャック(7a,7b)を装着し、前記バー材を第１主軸(1a)の貫通孔に挿通してその一方の端部(3a)を加工領域(5)に突出させ、第１主軸の前端チャック(6a)と後部チャック(7a)で当該バー材を把持して前記一方の端部の加工を行い、次に前記バー材を第２主軸(1b)の貫通孔に挿通してその他方の端部(3b)を加工領域(5)に突出させ、第２主軸の前端チャック(6b)と後部チャックで当該バー材を把持して前記他方の端部の加工を行い、第２主軸の貫通孔を通して加工済バー材を排出する、バー材の両端加工方法。   The distance between the front end chuck (6) and the rear end chuck (7) of the main spindle is such that the workpiece gripping position and the other end when processing one end (3a) of the bar material (3) to be processed at both ends. The rear chuck (7a, 7b) is mounted on the first and second spindles (1a, 1b) so that the distance between the gripping positions and the workpiece gripping position when machining the part (3b) is substantially equal. Then, the bar material is inserted into the through hole of the first main shaft (1a), and one end portion (3a) of the bar material is projected into the machining region (5), so that the front end chuck (6a) and the rear chuck ( In 7a), the bar material is gripped and the one end is processed, and then the bar material is inserted into the through hole of the second main shaft (1b) and the other end (3b) is processed in the processing region. Protruding to (5), gripping the bar material with the front end chuck (6b) and rear chuck of the second spindle, processing the other end, and discharging the processed bar material through the through hole of the second spindle To Both ends processing method of chromatography material.
JP2005259702A 2005-09-07 2005-09-07 Bar material both-end machining method and two-spindle facing lathe Active JP4722632B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005259702A JP4722632B2 (en) 2005-09-07 2005-09-07 Bar material both-end machining method and two-spindle facing lathe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005259702A JP4722632B2 (en) 2005-09-07 2005-09-07 Bar material both-end machining method and two-spindle facing lathe

Publications (2)

Publication Number Publication Date
JP2007069315A true JP2007069315A (en) 2007-03-22
JP4722632B2 JP4722632B2 (en) 2011-07-13

Family

ID=37931220

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005259702A Active JP4722632B2 (en) 2005-09-07 2005-09-07 Bar material both-end machining method and two-spindle facing lathe

Country Status (1)

Country Link
JP (1) JP4722632B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015036171A (en) * 2013-08-13 2015-02-23 株式会社スギノマシン Machine tool

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5727641A (en) * 1980-07-22 1982-02-15 Hitachi Seiki Co Ltd Positioning in steel pipe edge surface working machine and apparatus thereof
JPS6094208A (en) * 1983-10-28 1985-05-27 Yasuma Giken:Kk Bar material holding device
JP2002346805A (en) * 2001-05-25 2002-12-04 Nakamura Tome Precision Ind Co Ltd Feeder combinedly used as stopper of lathe and 2 main shaft opposite lathe equipped with the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5727641A (en) * 1980-07-22 1982-02-15 Hitachi Seiki Co Ltd Positioning in steel pipe edge surface working machine and apparatus thereof
JPS6094208A (en) * 1983-10-28 1985-05-27 Yasuma Giken:Kk Bar material holding device
JP2002346805A (en) * 2001-05-25 2002-12-04 Nakamura Tome Precision Ind Co Ltd Feeder combinedly used as stopper of lathe and 2 main shaft opposite lathe equipped with the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015036171A (en) * 2013-08-13 2015-02-23 株式会社スギノマシン Machine tool

Also Published As

Publication number Publication date
JP4722632B2 (en) 2011-07-13

Similar Documents

Publication Publication Date Title
JP2013022694A (en) Pipe cutter
CN104889668A (en) Reducing elastic mandrel clamping device
JP4310301B2 (en) Workpiece ejecting device for machine tools
JP4280253B2 (en) Work rotation device
US8161853B2 (en) Centering bushing for centering material bars
JP4722632B2 (en) Bar material both-end machining method and two-spindle facing lathe
CN109108697B (en) Thin-wall elastic support and tool and machining method thereof
KR20180089013A (en) Broaching machine and lathe including the same
JP3974363B2 (en) Internal surface processing method and apparatus
JP4331321B2 (en) Rod-like workpiece support device and support method in a turning machine tool
JP3855122B2 (en) Machine tool spindle equipment
WO2020129418A1 (en) Lathe
JP3595225B2 (en) Spindle device
JP4401701B2 (en) Cylindrical member processing method, cylindrical member processing apparatus, and cylindrical member
JPS63230219A (en) Working device for groove for generating dynamic pressure
CN205519782U (en) Lathe with automatic drilling device in main shaft
JPH1133876A (en) Spindle device
KR20100113924A (en) Multi spindle machine in 6 spindle
WO2020129417A1 (en) Lathe
JP2007038307A (en) Collet chuck and turning product manufacturing method
RU2338620C2 (en) Method and device for fabrication of at list partially profiled tubes
WO2020129416A1 (en) Lathe
CN112475074A (en) Necking method of thin-wall pipe fitting and necking equipment applying same
JP2006075927A (en) Boring and grooving method
RU2524024C2 (en) Lathe for pipe machining and method of pipe machining at said lather

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080730

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20101117

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101124

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110120

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110322

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110406

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140415

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4722632

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250