JPH02109605A - Method for controlling synchronous rotation of numerically controlled lathe - Google Patents
Method for controlling synchronous rotation of numerically controlled latheInfo
- Publication number
- JPH02109605A JPH02109605A JP26439188A JP26439188A JPH02109605A JP H02109605 A JPH02109605 A JP H02109605A JP 26439188 A JP26439188 A JP 26439188A JP 26439188 A JP26439188 A JP 26439188A JP H02109605 A JPH02109605 A JP H02109605A
- Authority
- JP
- Japan
- Prior art keywords
- spindle
- sub
- main
- main shaft
- phase difference
- 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
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 11
- 238000001514 detection method Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 abstract description 6
- 239000006227 byproduct Substances 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- PJVWKTKQMONHTI-UHFFFAOYSA-N warfarin Chemical group OC=1C2=CC=CC=C2OC(=O)C=1C(CC(=O)C)C1=CC=CC=C1 PJVWKTKQMONHTI-UHFFFAOYSA-N 0.000 description 2
- 235000009421 Myristica fragrans Nutrition 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000001115 mace Substances 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
- B23Q39/04—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being arranged to operate simultaneously at different stations, e.g. with an annular work-table moved in steps
- B23Q39/048—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being arranged to operate simultaneously at different stations, e.g. with an annular work-table moved in steps the work holder of a work station transfers directly its workpiece to the work holder of a following work station
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turning (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、主軸に対向する副主軸を有する数値制御旋盤
における主軸及び副主軸間の同期回転制御方式に関する
。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a synchronous rotation control system between a main spindle and a sub-spindle in a numerically controlled lathe having a sub-spindle facing the main spindle.
（従来の技術）
対向する２つのスピンドル、メインスピンドル（以下、
主軸とする）とサブスピンドル（以下、副主軸とする）
とを持つ旋盤においては、−船釣に主軸で第１工程を行
ない、副主軸で第２工程（たとえば背面加工）を行なう
ようになっている。(Prior art) Two opposing spindles, the main spindle (hereinafter referred to as
(hereinafter referred to as the main spindle) and sub-spindle (hereinafter referred to as the sub-spindle)
In a lathe having a main shaft, the first process is carried out by the main spindle, and the second process (for example, back processing) is carried out by the sub-main spindle.
そして、第１工程から第２工程へ移行する際、副主軸を
主軸に近づけて直接ワークを受渡すようにしている。第
１工程の最後と第２工程の最初が旋削であり、加工する
上では主軸を停止する必要のない場合は、主軸を回転さ
せたままでワークを受渡すことができれば、主軸を停止
させてから再び回転させるまでの時間を省くことができ
る。When moving from the first process to the second process, the sub-spindle is moved closer to the main spindle to directly transfer the workpiece. The end of the first process and the beginning of the second process are turning, and if the main spindle does not need to be stopped during machining, if the workpiece can be transferred while the main spindle is still rotating, the main spindle should be stopped and then turned. This saves time until it is rotated again.
従来技術では主軸回転中にワークを受渡す場合、主軸回
転数に副主軸回転数を合せて双方の回転数が一致した時
に主軸と副主軸との間の同期回転が完了したとみなし、
その状態でワークの受渡しを行なっていた。つまり、従
来技術は主軸及び副主軸の回転数（速度）のみの同期制
御であり。In conventional technology, when transferring a workpiece while the main spindle is rotating, it is assumed that the synchronous rotation between the main spindle and the sub-spindle is complete when the rotation speed of the main spindle and the sub-spindle are matched, and the rotation speed of the sub-spindle is considered to be complete.
In this state, the work was delivered. In other words, the conventional technology is synchronous control of only the rotational speed (speed) of the main spindle and sub-spindle.
位相差を残したままである。このため、ワークが丸材の
場合は副主軸はどの位置でも把めるから問題はないが、
ワークが角材の場合は副主軸が安定して把める位置は限
られるため、主軸と副主軸の双方で位相差があってはう
まく把めない場合がある。The phase difference remains. For this reason, if the workpiece is a round material, there is no problem because the sub-spindle can be gripped at any position.
If the workpiece is a square piece of timber, there are only a limited number of positions where the sub-spindle can stably grip it, so if there is a phase difference between the main and sub-spindles, it may not be possible to grip it properly.
（発明が解決しようとする課題）
以上のように、主軸回転中にワークを受渡す際に、ワー
クが角材の場合には主軸と副主軸の位相を回転中に合せ
る機能が必要となる。(Problems to be Solved by the Invention) As described above, when transferring a workpiece while the main shaft is rotating, if the workpiece is a square piece of material, a function is required to match the phases of the main shaft and sub-main shaft during rotation.
本発明は上述のような事情よりなされたものであり、本
発明の目的は、回転中に主軸から副主軸へワークを受渡
ず場合に、主軸と副主軸の位相を合せることにより、丸
材ばかりでなく角材の受渡しも可能な数値制御旋盤にお
ける主軸と副主軸間の同期回転制御方式を提供すること
にある。The present invention was made in view of the above-mentioned circumstances, and an object of the present invention is to align the phases of the main spindle and the sub-spindle when the workpiece is not transferred from the main spindle to the sub-spindle during rotation, so that only round materials can be processed. An object of the present invention is to provide a synchronous rotation control system between a main spindle and a sub-main spindle in a numerically controlled lathe, which enables the transfer of square pieces without any problems.
（課題を解決するための手段）
本発明の上記目的は、主軸及び副主軸にそれぞれ位置検
出手段を設け、主軸及び副主軸の間で主軸及び副主軸が
回転中のワークの受渡しを行なう際、回転中の双方の位
置検出値の差（位相差）を検出し、その位相差分だけ副
主軸を遅らせるか又は進ませて位相を合せることによっ
て達成される。すなわち、本発明は、主軸に対向する副
主軸を有し、前記主軸及び副主軸にそれぞれ位置検出手
段を設け、前記位置検出手段により検出された前記主軸
の位置に従って前記副主軸が位置制御されるようになっ
ている数値制御旋盤における同期回転制御方式に関する
もので、本発明の上記目的は、前記主軸及び副主軸間で
前記主軸及び副主軸が回転中にワークの受渡しを行なう
際、前記主軸及び副主軸の回転数を一致させるのみなら
ず、前記位置検出手段で前記主軸と前記副主軸との間の
位相差を検出し、前記副主軸を一時的に減速するか又は
加速することにより前記位相差を無くし、前記主軸及び
副主軸の位相をも一致させるようにすること虹よって達
成される。(Means for Solving the Problems) The above-mentioned object of the present invention is to provide position detection means on the main spindle and the sub-spindle, and to transfer a workpiece between the main spindle and the sub-spindle while the main spindle and the sub-spindle are rotating. This is achieved by detecting the difference (phase difference) between the two position detection values during rotation, and adjusting the phases by delaying or advancing the sub-main shaft by the phase difference. That is, the present invention has a sub-spindle facing the main spindle, a position detecting means is provided on each of the main spindle and the sub-spindle, and the position of the sub-spindle is controlled according to the position of the main spindle detected by the position detecting means. The present invention relates to a synchronous rotation control system in a numerically controlled lathe, which is configured as follows.The above object of the present invention is to provide a synchronous rotation control method for a numerically controlled lathe, when a workpiece is transferred between the main spindle and the sub-main spindle while the main spindle and the sub-main spindle are rotating. In addition to matching the rotational speed of the sub-main shaft, the position detecting means detects the phase difference between the main shaft and the sub-main shaft, and temporarily decelerates or accelerates the sub-main shaft to adjust the position. This is achieved by eliminating the phase difference and making the phases of the main axis and sub-main axis coincide.
（作用）
本発明は数値制御旋盤における主軸と副主軸の間の同期
回転制御方式に関するもので、主軸及び副主軸双方の回
転数を一致させて位相差が一定となった状態で位相差を
検出する。その時の副主軸の瞬時回転指令値がΔＣＯＮ
であったとすると、以後−時的に副主軸の瞬時回転指令
値を微量ダウン（Δψ）させて位相合せを行な恒。つま
り、位相差がΔθだったとするとΔθ÷Δψ＝Ｎ・・・
Δψ。(Function) The present invention relates to a synchronous rotation control method between a main spindle and a sub-spindle in a numerically controlled lathe, and detects the phase difference when the rotational speeds of both the main spindle and the sub-spindle are matched and the phase difference is constant. do. The instantaneous rotation command value of the sub-spindle at that time is ΔCON
If so, then the instantaneous rotation command value of the sub-spindle will be slightly decreased (Δψ) from time to time to perform phase alignment. In other words, if the phase difference is Δθ, Δθ÷Δψ=N...
Δψ.
で（ΔＣ０Ｎ−Δψ）の瞬時回転指令値でＮ回転指令し
、（−ＣＯＮ−Δψ°）で１回転指令した時点で位相は
一致するはずである。位相が一致した後は瞬時回転指令
値をΔＣＯＮに戻し、位相差＝０で一定状態となる。The phases should match when N rotations are commanded with an instantaneous rotation command value of (ΔC0N-Δψ) and one rotation is commanded with (-CON-Δψ°). After the phases match, the instantaneous rotation command value is returned to ΔCON, and a constant state is maintained with the phase difference=0.
（実施例）
第１図は対向する主軸１及び副主軸７の構造図であり、
この２つの輪間でワーク６を受は渡すようになっている
。すなわち、主軸１にはチャック２が装着されており、
チャック２はワーク６を把握しており、副主軸７にはチ
ャック８が装着されている。本発明は、主軸１及び副主
軸７が回転中に、チャック２が把握しでいるワーク６を
チャック８で把握させるものである。主制御装置１２に
よる指令に基づいて、主軸モータ駆動部４及び副主軸そ
一タ駆動部ｌＯはそれぞれ主軸モータ３及び副主軸モー
タ９を駆動し、モータ３及び９の回転がそれぞれ主軸１
及び副主軸７に伝達され、これによって主軸１及び副主
軸７が回転駆動される。位置検出器５及び１１は主軸ｌ
及び副主軸７の回転位置をそれぞれ検出する。位置検出
器５及び１１の位置検出信号ＭＰＳ及びＰＰＳは主制御
装置１２に入力され、主制御装置１２は主軸モータ３の
指令として回転指令ＭＤＳを出力すると共に、副主軸モ
ータ９の指令として回転指令ＰＤＳを出力する。(Example) FIG. 1 is a structural diagram of a main shaft 1 and a sub-main shaft 7 facing each other,
The workpiece 6 is passed between these two rings. That is, the chuck 2 is attached to the main shaft 1,
The chuck 2 grips a workpiece 6, and a chuck 8 is attached to the sub-main shaft 7. The present invention allows the chuck 8 to grasp the workpiece 6 that the chuck 2 has already grasped while the main spindle 1 and the sub-main spindle 7 are rotating. Based on the commands from the main controller 12, the main shaft motor drive section 4 and the sub main shaft motor drive section 1O drive the main shaft motor 3 and the sub main shaft motor 9, respectively, so that the rotation of the motors 3 and 9 respectively drives the main shaft 1.
and is transmitted to the sub-main shaft 7, whereby the main shaft 1 and the sub-main shaft 7 are rotationally driven. The position detectors 5 and 11 are connected to the main axis l.
and the rotational position of the sub-main shaft 7, respectively. The position detection signals MPS and PPS of the position detectors 5 and 11 are input to the main controller 12, and the main controller 12 outputs a rotation command MDS as a command for the main shaft motor 3, and also outputs a rotation command as a command for the sub-main shaft motor 9. Output PDS.
第４図は副主軸７が主軸１と同一回転数になったときの
位置関係を示しており、このとき副主軸７のチャック８
はまだ開いている。第４図中の右方の円は点Ｏを中心と
する回転座標である。Figure 4 shows the positional relationship when the sub-spindle 7 reaches the same rotation speed as the main spindle 1, and the chuck 8 of the sub-spindle 7 at this time.
is still open. The circle on the right in FIG. 4 is a rotational coordinate centering on point O.
チャック２上の点Ｍは主軸ｌの基準点、チャック８上の
点Ｐは副主軸７の基準点、点ＰＭは基準点Ｍの回転座標
値、点ＰＰは基準点Ｐの回転座標値とする。そして、第
４図を左から右方向に見たときの右回りを回転軸増加方
向とし、主軸１及び副主軸７が共に回転軸増加方向に回
転しているとする。The point M on the chuck 2 is the reference point of the main axis l, the point P on the chuck 8 is the reference point of the sub-main axis 7, the point PM is the rotational coordinate value of the reference point M, and the point PP is the rotational coordinate value of the reference point P. . It is assumed that the clockwise rotation when FIG. 4 is viewed from the left to the right is the rotation axis increasing direction, and that the main shaft 1 and the sub-main shaft 7 are both rotating in the rotation axis increasing direction.
第４図の場合、点ＰＰは点ＰＭに対してθ分だけ進んで
いるので、このままでは副生＠７のチャック８はワーク
６がθ分だけ遅れた状態で把握することになる。In the case of FIG. 4, since the point PP is ahead of the point PM by θ, the chuck 8 of the by-product @7 will grasp the workpiece 6 with a delay of θ.
以下、本発明による回転中の主軸１と副生＠Ｉｔ ７の
位相合せ方式について説明する。ここでは、副生＠７を
減速させて位相を合せる場合を例にとって説明するが、
副生＠７を加速させて位相を合わせることも可能である
。Hereinafter, a method of phasing the rotating main shaft 1 and the by-product @It 7 according to the present invention will be described. Here, we will explain the case where the by-product @7 is decelerated and the phase is adjusted as an example.
It is also possible to accelerate the by-product @7 and match the phase.
第２図は本発明方式を実現するための制御系ブロックを
第１図に対応させて示している。主制御装置１２内のコ
マンド解析部１２０から主軸回転指令ＭＨＩが出力され
ると、主軸回転制御部１２１は主軸回転指令ＭＨＩに基
づいて主軸モータ駆動部４に対して回転指令ＭＤＳを出
力し、主軸回転数算出部１２３は位置検出器５からの位
置検出信号ＭＰＳに基づいて主軸１の回転数ＭＲを算出
する。主軸１が回転中に、コマンド解析部１２０から主
軸１に対する副生ｔｌｄ７の同期回転指令ＳＹＲが出力
されると、副主軸回転制御部１２５はその時の主軸回転
指令に基づいて副主軸モータ駆動部ｌＯに対して副主軸
回転指令ＰＤＳを出力し、副主軸回転数算出部１２２は
位置検出器１１からの位置検出信号ｐｐｓに基づいて副
生ｌ１ＩＩ１７の回転数ＰＲを算出する。回転数比較部
１２１１は副主軸７の回転数ＰＲを主軸ｌの回転数ＭＲ
と比較し、一致したときに回転数一致信号ＣＮを副主軸
回転制御部１２５へ転送する。副主軸回転制御部１２５
は回転数一致信号ＣＮを人力すると、回転数が一致した
時の副主軸７の回転指令を以後副主軸モータ駆動部ｌＯ
へ出力し続ける。従来技術では上述のように、主軸ｌと
副生＠７の回転数のみを一致させる制御をしていた。FIG. 2 shows control system blocks for realizing the system of the present invention in correspondence with FIG. 1. When the command analysis unit 120 in the main controller 12 outputs the spindle rotation command MHI, the spindle rotation control unit 121 outputs a rotation command MDS to the spindle motor drive unit 4 based on the spindle rotation command MHI, and The rotation speed calculation unit 123 calculates the rotation speed MR of the main shaft 1 based on the position detection signal MPS from the position detector 5. When the command analysis unit 120 outputs a synchronous rotation command SYR for the by-product tld7 to the main spindle 1 while the main spindle 1 is rotating, the sub-spindle rotation control unit 125 controls the sub-spindle motor drive unit lO based on the main spindle rotation command at that time. The sub-spindle rotational speed calculation unit 122 calculates the rotation speed PR of the sub-spindle I1II17 based on the position detection signal pps from the position detector 11. The rotation speed comparison unit 1211 converts the rotation speed PR of the sub-spindle 7 into the rotation speed MR of the main shaft l.
When they match, the rotation speed matching signal CN is transferred to the sub-spindle rotation control section 125. Sub spindle rotation control section 125
When the rotation speed match signal CN is input manually, the rotation command for the sub-spindle 7 when the rotation speeds match is then sent to the sub-spindle motor drive unit lO.
Continue outputting to. In the prior art, as described above, only the rotational speeds of the main shaft 1 and the by-product @7 were controlled to match.
本発明ではさらに主軸１と副主軸７の位相差を一致させ
るために、副主軸位置検出部１２６で位置検出器１１か
らの位置検出信号ｐｐｓに基づいて副生＠７の位置ＰＰ
を検出し、また、主軸位置検出部１２７で位置検出器５
からの位置検出信号ＭＰＳに基づいて主軸ｌの位置ＭＰ
を検出し、双方の位置の差（位相差）を位相差検出部１
２８で検出し、検出された位相差θを副主軸減速部１２
９へ転送するようになっている。副主軸減速部１２９は
、回転数比較部１２４より回転数一致偲号ＣＮを入力し
た時点の位相差θに基づき、副主軸７の減速量ＰＤＷＮ
を副主軸回転制御部１２５へ出力する。副生ｌ１ｒｂ回
転制御部１２５は、減速ｆｆ１ＰＤＷＮだけ減速した回
転指令ＰＤＳを副主軸モータ駆動部ｌＯへ転送する。上
述のような副主軸減速制御を位相差θが０になるまで続
け、位相差が０となった時点で減速量ＰＤＷＮも０とし
、以後主軸回転数に一致した副主軸回転指令ＰＤＳを出
力する。In the present invention, in order to match the phase difference between the main shaft 1 and the sub-main shaft 7, the sub-main shaft position detection section 126 detects the position PP of the sub-generated @7 based on the position detection signal pps from the position detector 11.
, and the position detector 5 is detected by the spindle position detection section 127.
Position MP of main shaft l based on position detection signal MPS from
and detects the difference (phase difference) between the two positions by the phase difference detection unit 1.
28, and the detected phase difference θ is detected by the sub-main shaft reduction unit 12.
9. The auxiliary main shaft deceleration unit 129 determines the deceleration amount PDWN of the auxiliary main shaft 7 based on the phase difference θ at the time when the rotational speed coincidence signal CN is input from the rotational speed comparison unit 124.
is output to the sub-spindle rotation control section 125. The by-product l1rb rotation control unit 125 transfers the rotation command PDS decelerated by the deceleration ff1PDWN to the sub-main shaft motor drive unit lO. The sub-spindle deceleration control as described above is continued until the phase difference θ becomes 0, and when the phase difference becomes 0, the deceleration amount PDWN is also set to 0, and thereafter the sub-spindle rotation command PDS that matches the main shaft rotation speed is output. .
第３図のフローチャートは主ｆＩＩＩｌｌと副主軸７の
位相合せ処理を示し、第５図は第３図の処理の流れ（ス
テップ５ｌ−５６）に対応した副主軸７の回転指令値の
推Ｂを示している。The flowchart in FIG. 3 shows the phase matching process for the main spindle and the sub-spindle 7, and FIG. It shows.
先ずステップＳｌ及びＳ２で、副主軸回転数が主軸回転
数に合うように副主軸７の回転指令を行なう。副主軸回
転数が主軸回転数と一致したと籾、位相差検出部１２８
で主＠１１１と副主軸７の位相差θを検出する（ステッ
プ５３）。この場合、位相差θは副主軸７の位相が主軸
１の位相に対してどれだけ進んでいるかで検出する。次
に、副主軸７の回転指令を一時的に微小低下させて副主
軸７の位相を少しずつ遅らせることにより、主１１１［
ｌ１１の位相に合わせる（ステップＳ４，５５ ）。こ
の時の微小低下量をψとすると、次式が成り立つ。First, in steps Sl and S2, a rotation command for the sub-spindle 7 is given so that the sub-spindle rotation speed matches the main spindle rotation speed. When the sub-spindle rotational speed matches the main-spindle rotational speed, the phase difference detection unit 128
The phase difference θ between the main @ 111 and the sub-main axis 7 is detected (step 53). In this case, the phase difference θ is detected based on how far the phase of the sub-main shaft 7 advances relative to the phase of the main shaft 1. Next, by temporarily slightly decreasing the rotation command of the sub-main shaft 7 and delaying the phase of the sub-main shaft 7 little by little, the main 111 [
The phase is adjusted to the phase of l11 (step S4, 55). If the amount of slight decrease at this time is ψ, the following equation holds true.
θ＝ψＸＮ＋ψ° （ψ゛くψ）・・・・・・（１
）つまり、ψだけ低下した回転指令値をＮ回、ψ′だけ
低下した回転指令値を１回指令すれば、位相は一致する
はずである。第５図の斜線部ＤＳで示される減速量が位
相差θに相当している。副生＠７の位相液（軸１の位相
と一致したとき・副主軸７の回転指令値を主軸ｌと同じ
値に戻す（ステップＳ６）、このようにして副主軸７の
回転数及び位相を、主軸１のそれに合わせることができ
る。θ=ψXN+ψ° (ψ゛kuψ)・・・・・・(1
) In other words, if the rotation command value decreased by ψ is commanded N times and the rotation command value decreased by ψ' is commanded once, the phases should match. The amount of deceleration indicated by the shaded area DS in FIG. 5 corresponds to the phase difference θ. The phase liquid of the by-product @7 (when the phase matches the phase of the axis 1, the rotation command value of the sub-spindle 7 is returned to the same value as that of the main axis l (step S6). In this way, the rotation speed and phase of the sub-spindle 7 are adjusted. , can be matched to that of the main shaft 1.
なお、上述では副生軸７を減速して位相合せする場合に
ついて説明したが、副主軸７を加速して位相合せする場
合も全く同様に考えればよい。また、上述では主軸１か
ら副主軸７ヘワークを受渡す場合について説明したが、
逆に副生！ｂ７から主軸１ヘワークを受渡す場合も全く
同様に考えればよい。In addition, although the case where the sub-production shaft 7 is decelerated and phase-aligned is described above, the case where the sub-main shaft 7 is accelerated and phase-aligned may be considered in exactly the same way. Furthermore, in the above description, the case where the workpiece is transferred from the main spindle 1 to the sub-spindle 7 is explained.
On the contrary, it is a byproduct! When transferring the workpiece from b7 to spindle 1, it is sufficient to think in exactly the same way.
（発明の効果）
以上のように本発明によれば、主軸に対向する副主軸を
有する数値制御旋盤において、ワークが角材の場合にも
主軸を回転させたままでワークを副主軸へ受渡すことが
可能となり、主軸側での加工から副主軸側への加工へ移
る際に、主軸を停止させて再び回転させる必要がなくな
るため、その分加工時間を短縮することができる。(Effects of the Invention) As described above, according to the present invention, in a numerically controlled lathe having a sub-spindle facing the main spindle, even when the workpiece is a square piece of material, the workpiece can be transferred to the sub-spindle while the main spindle remains rotating. When moving from machining on the main spindle side to machining on the sub-spindle side, there is no need to stop and rotate the main spindle again, so the machining time can be shortened accordingly.
第１図は対向する２つの主軸及び副主軸の構成例を示す
図、第２図はそのＩＩＩ御系を示すブロック図、第３図
は主軸と副主軸の位相合せ処理例を示すフローチＷ −
ト、第４図は主軸及び副生軸が同回転数で回転している
ときの位置関係を示す図、第５図は第３図のフローチャ
ートに対応した副主軸の回転指令値の推穆を示す図であ
る。
！・・・主軸、３・・・主軸モータ、４・・・主軸モー
タ駆動部、５．ｌト・・位置検出器、７・・・副主軸、
９・・・副主軸モータ、１０・・・副主軸モータ駆動部
、１２・・・主制御装置、１２０・・・コマンド解析部
、１２１・・・主軸回転制御部、１２２・・・副主軸回
転数算出部、１２３・・・主軸回転数算出部、１２４・
・・回転数比較部、１２５・・・副主軸回転制御部、１
２Ｂ・・・副主軸位置検出部、１２７・・・主軸位置検
出部、１２８・・・位相差検出部、１２９・・・副主軸
減速部。
第
回
メース
／−一＼
】Fig. 1 is a diagram showing an example of the configuration of two opposing main axes and sub-main axes, Fig. 2 is a block diagram showing its III system, and Fig. 3 is a flowchart showing an example of phase alignment processing of the main axes and sub-main axes.
Fig. 4 is a diagram showing the positional relationship when the main shaft and sub-production shaft are rotating at the same rotation speed, and Fig. 5 shows the estimation of the rotation command value of the sub-main shaft corresponding to the flowchart in Fig. 3. FIG. ! ... Main shaft, 3... Main shaft motor, 4... Main shaft motor drive section, 5. l...Position detector, 7...Sub spindle,
9...Sub spindle motor, 10...Sub spindle motor drive section, 12...Main controller, 120...Command analysis section, 121...Spindle rotation control section, 122...Sub spindle rotation Number calculation unit, 123... Spindle rotation speed calculation unit, 124.
... Rotation speed comparison section, 125... Sub-spindle rotation control section, 1
2B...Sub spindle position detection section, 127...Spindle position detection section, 128...Phase difference detection section, 129...Sub spindle reduction section. 1st Mace/-1\]
Claims (1)
にそれぞれ位置検出手段を設け、前記位置検出手段によ
り検出された前記主軸あるいは副主軸の位置に従って前
記副主軸あるいは主軸が位置制御されるようになってい
る数値制御旋盤において、前記主軸及び副主軸間で前記
主軸及び副主軸が回転中にワークの受渡しを行なう際、
前記主軸及び副主軸の回転数を一致させるのみならず、
前記位置検出手段で前記主軸と前記副主軸との間の位相
差を検出し、前記副主軸あるいは主軸を一時的に減速す
るか又は加速することにより前記位相差を無くし、前記
主軸及び副主軸の位相をも一致させるようにしたことを
特徴とする数値制御旋盤における同期回転制御方式。1. It has a sub-spindle facing the main spindle, position detection means are provided on each of the main spindle and sub-spindle, and the position of the sub-spindle or main spindle is controlled according to the position of the main spindle or sub-spindle detected by the position detection means. In a numerically controlled lathe that is designed to operate, when a workpiece is transferred between the main spindle and the sub-main spindle while the main spindle and the sub-main spindle are rotating,
In addition to matching the rotational speed of the main shaft and sub-main shaft,
The position detecting means detects a phase difference between the main shaft and the sub-main shaft, and temporarily decelerates or accelerates the sub-main shaft or the main shaft to eliminate the phase difference, and the main shaft and the sub-main shaft are A synchronous rotation control method for numerically controlled lathes, which is characterized by matching the phases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26439188A JPH02109605A (en) | 1988-10-20 | 1988-10-20 | Method for controlling synchronous rotation of numerically controlled lathe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26439188A JPH02109605A (en) | 1988-10-20 | 1988-10-20 | Method for controlling synchronous rotation of numerically controlled lathe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02109605A true JPH02109605A (en) | 1990-04-23 |
Family
ID=17402507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26439188A Pending JPH02109605A (en) | 1988-10-20 | 1988-10-20 | Method for controlling synchronous rotation of numerically controlled lathe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02109605A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6333615B1 (en) | 1997-07-02 | 2001-12-25 | Mitsubishi Denki Kabushiki Kaisha | Synchronization control device for servo motors |
| CN113543912A (en) * | 2019-04-11 | 2021-10-22 | 西铁城时计株式会社 | Machine tool and sensing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01228751A (en) * | 1988-03-09 | 1989-09-12 | Fanuc Ltd | Machine tool with two spindles |
-
1988
- 1988-10-20 JP JP26439188A patent/JPH02109605A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01228751A (en) * | 1988-03-09 | 1989-09-12 | Fanuc Ltd | Machine tool with two spindles |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6333615B1 (en) | 1997-07-02 | 2001-12-25 | Mitsubishi Denki Kabushiki Kaisha | Synchronization control device for servo motors |
| DE19882519B4 (en) * | 1997-07-02 | 2005-12-22 | Mitsubishi Denki K.K. | Synchronization control unit for a servomotor |
| CN113543912A (en) * | 2019-04-11 | 2021-10-22 | 西铁城时计株式会社 | Machine tool and sensing method |
| EP3954481A4 (en) * | 2019-04-11 | 2023-01-04 | Citizen Watch Co., Ltd. | Machine tool, and detecting method |
| CN113543912B (en) * | 2019-04-11 | 2023-12-26 | 西铁城时计株式会社 | Machine tool and sensing method |
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