JPH06143015A - Cutting controller - Google Patents
Cutting controllerInfo
- Publication number
- JPH06143015A JPH06143015A JP29974492A JP29974492A JPH06143015A JP H06143015 A JPH06143015 A JP H06143015A JP 29974492 A JP29974492 A JP 29974492A JP 29974492 A JP29974492 A JP 29974492A JP H06143015 A JPH06143015 A JP H06143015A
- Authority
- JP
- Japan
- Prior art keywords
- current
- cutting
- cutting tool
- electric motor
- main
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はボール盤等の回転切削用
工具の切削制御装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting control device for a rotary cutting tool such as a drilling machine.
【０００２】[0002]
【従来の技術】従来の切削用工具においては、切削工具
に作用する負荷トルクが切削工具の送り速度に比例して
変化し、さらに上記負荷トルクは主電動機の電流に比例
するので、上記主電動機の電流が所定値となるように切
削工具の送り速度を調整して上記負荷トルクを所定値に
保つようにしていた。切削工具に切れ味が低下したり被
穿孔物が固く、切削中に主電動機が過負荷になった場
合、送り電動機を停止し切削を中止し、主電動機の電流
が無負荷電流まで低下したら、再び送り電動機を駆動し
て切削を開始（オートステップフィード）し、切削工具
がロックしないよう保護している。2. Description of the Related Art In a conventional cutting tool, the load torque acting on the cutting tool changes in proportion to the feed speed of the cutting tool, and the load torque is proportional to the current of the main electric motor. The feed torque of the cutting tool is adjusted so that the current of (1) becomes a predetermined value, and the load torque is kept at a predetermined value. If the cutting tool has poor sharpness or the object to be drilled is hard and the main motor is overloaded during cutting, stop the feed motor and stop cutting.If the current of the main motor drops to no-load current, The feed motor is driven to start cutting (auto step feed) to protect the cutting tool from locking.
【０００３】[0003]
【発明が解決しようとする課題】上記従来技術では、切
削工具の切れ味が低下したり被穿孔物が固く、オートス
テップフィードが働いても主電動機の定電流制御値を変
えないので、切削工具がロックする危険性がのこる。切
削工具がロックすると、切削工具の寿命が極端に短くな
るという問題がある。 本発明の目的は、上記課題を克
服し、切削工具をロックさせにくくし、長寿命化するこ
とのできる切削制御装置を提供することにある。In the above-mentioned prior art, since the sharpness of the cutting tool is deteriorated or the object to be drilled is hard and the constant current control value of the main motor is not changed even when the automatic step feed works, the cutting tool is There is a risk of locking. When the cutting tool is locked, there is a problem that the life of the cutting tool is extremely shortened. An object of the present invention is to provide a cutting control device that overcomes the above problems, makes it difficult to lock a cutting tool, and has a long life.
【０００４】[0004]
【課題を解決するための手段】本発明は上記課題を解決
するために、主電動機の過負荷を検出した場合、主電動
機の定電流制御値を下げ、切削工具をロックさせにくく
する。In order to solve the above problems, the present invention lowers the constant current control value of the main motor to make it difficult to lock the cutting tool when an overload of the main motor is detected.
【０００５】[0005]
【作用】以上のように構成した本発明の切削制御装置
は、切削工具がロックしにくく長寿命化できる。In the cutting control device of the present invention having the above-described structure, the cutting tool is hard to lock and the life can be extended.
【０００６】[0006]
【実施例】図１は本発明の一実施例の回路図、図２は図
１における本発明の制御手順を示すフローチャートであ
る。以下、図２の手順に従って図１に示す回路の動作を
説明する。1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is a flow chart showing the control procedure of the present invention in FIG. The operation of the circuit shown in FIG. 1 will be described below according to the procedure of FIG.
【０００７】図２におけるスタートは、切削工具７を電
気ドリル３に固定し、電源スイッチ９及びドリルスイッ
チ１０を投入する手順に相当する。電源スイッチ９が投
入されると交流電源８は整流ブリッジ１１により整流さ
れ、電磁コイル１２に電流を流して被穿孔物を吸着固定
する。ドリルスイッチ１０が投入されると電源回路２４
が動作し、マイクロコンピュータ２５が動作を開始す
る。The start in FIG. 2 corresponds to the procedure of fixing the cutting tool 7 to the electric drill 3 and turning on the power switch 9 and the drill switch 10. When the power switch 9 is turned on, the AC power source 8 is rectified by the rectifying bridge 11, and a current is passed through the electromagnetic coil 12 to attract and fix the object to be drilled. When the drill switch 10 is turned on, the power circuit 24
And the microcomputer 25 starts operating.
【０００８】手順４０１では、マイクロコンピュータ２
５は動作を開始すると主電動機２の定速回転信号を出力
ポート２５５、ドライバ２６、点弧回路１５の順で半導
体制御素子１３に伝え主電動機２を一定回転数で回転さ
せる。In step 401, the microcomputer 2
When the motor 5 starts its operation, it transmits a constant speed rotation signal of the main motor 2 to the semiconductor control element 13 in the order of the output port 255, the driver 26 and the ignition circuit 15 to rotate the main motor 2 at a constant rotation speed.
【０００９】手順４０２では、主電動機２の起動電流を
電流検出器２２により検出し、アナログ／ディジタル変
換器２５６によりディジタル信号に変換してマイクロコ
ンピュータ２５に伝達する。これによりマイクロコンピ
ュータ２５は起動電流の終了を検出し次の手順に移行す
る。In step 402, the starting current of the main motor 2 is detected by the current detector 22, converted into a digital signal by the analog / digital converter 256, and transmitted to the microcomputer 25. As a result, the microcomputer 25 detects the end of the starting current and shifts to the next procedure.
【００１０】起動電流の終了後は主電動機２の無負荷電
流が検出されるので、手順４０３では無負荷電流Ｉｎを
記憶する。Since the no-load current of the main motor 2 is detected after the end of the starting current, the no-load current In is stored in step 403.
【００１１】次の手順４０４では、マイクロコンピュー
タ２５により実際の一定トルク切削に対応する電流値Ｉ
ｔを算出して主電動機２の定電流制御値（Ｉｎ＋Ｉｔ）
を算出する。In the next step 404, the microcomputer 25 uses the current value I corresponding to the actual constant torque cutting.
constant current control value of the main motor 2 (In + It)
To calculate.
【００１２】次の手順４０５では、送り電動機４を制御
して電気ドリル３を下降させる。この動作ではマイクロ
コンピュータ２５内の出力ポート２５５からドライバ２
６、点弧回路１６を介して半導体制御素子１４に制御信
号が伝達され、送り電動機４が駆動される。In the next step 405, the feed motor 4 is controlled to lower the electric drill 3. In this operation, the driver 2 is output from the output port 255 in the microcomputer 25.
6. The control signal is transmitted to the semiconductor control element 14 via the ignition circuit 16, and the feed motor 4 is driven.
【００１３】次の手順４０６では主電動機２の電流変化
から被穿孔物の穿孔開始が検出される。In the next step 406, the start of perforation of the object to be perforated is detected from the change in the electric current of the main motor 2.
【００１４】穿孔開始を検出すると手順４０６で、送り
電動機４による主電動機２の電流制御が行われる。すな
わち、主電動機２の電流が増加するときは送り電動機４
を減速して切削工具７にかかる負荷を軽減し、逆に主電
動機２の電流が減少するときは送り電動機４を加速して
切削工具７にかかる負荷を増加させるようにして主電動
機２の電流を所定値に保つようにする。When the start of punching is detected, in step 406, the feed motor 4 controls the current of the main motor 2. That is, when the current of the main motor 2 increases, the feed motor 4
To reduce the load on the cutting tool 7, and conversely, when the current of the main motor 2 decreases, the feed motor 4 is accelerated to increase the load on the cutting tool 7 to increase the current of the main motor 2. Is maintained at a predetermined value.
【００１５】手順４０８で主電動機２の電流が所定値を
越えると過負荷処理に移行する。In step 408, when the current of the main motor 2 exceeds a predetermined value, the overload process is started.
【００１６】次の手順４１０で電気ドリル３の下降を停
止し切削を一時中止する。In the next step 410, the lowering of the electric drill 3 is stopped and the cutting is temporarily stopped.
【００１７】手順４１１で主電動機２の定電流制御値を
演算（Ｉｃ−Ｉｒ）しなおす。上記Ｉｒは切削条件に対
応してメモリ装置に記憶された値、あるいは所定の演算
式に従って上記切削条件から算出されるものでも良い。In step 411, the constant current control value of the main motor 2 is recalculated (Ic-Ir). The Ir may be a value stored in the memory device corresponding to the cutting condition, or may be calculated from the cutting condition according to a predetermined arithmetic expression.
【００１８】手順４１２で主電動機２の電流が無負荷電
流に戻れば、手順４０５に戻り切削を再開し、演算しな
おした定電流制御値により電流制御が行われる。When the current of the main motor 2 returns to the no-load current in step 412, the process returns to step 405 to restart cutting and current control is performed by the constant current control value recalculated.
【００１９】手順４１３で電気ドリル３の下降を停止し
てもある所定時間、主電動機２の電流が無負荷電流に戻
らない場合は、電気ドリル３を停止して穿孔を終了す
る。In step 413, if the electric current of the main motor 2 does not return to the no-load current for a predetermined time even after the lowering of the electric drill 3 is stopped, the electric drill 3 is stopped to finish the drilling.
【００２０】手順４０９では、主電動機電流の無負荷電
流復帰を検出し穿孔を終了する。In step 409, the return of the no-load current of the main motor current is detected, and the boring is completed.
【００２１】[0021]
【発明の効果】本発明によれば、切削工具の切れ味が悪
くなったり被穿孔物が固くても、切削工具がロックしに
くくなり切削工具を長寿命化できる。According to the present invention, even if the cutting tool becomes less sharp or the object to be drilled is hard, the cutting tool is less likely to lock and the cutting tool can have a longer life.
【図１】本発明による切削制御装置の実施例回路図であ
る。FIG. 1 is a circuit diagram of an embodiment of a cutting control device according to the present invention.
【図２】本発明実施例のフローチャートである。FIG. 2 is a flowchart of an embodiment of the present invention.
【図３】本発明による切削装置の外観図である。FIG. 3 is an external view of a cutting device according to the present invention.
１はドリルスタンド、２は主電動機、３は電気ドリル、
４は送り電動機、５は制御ボックス、６は電磁ベース、
７は切削工具、８は交流電源、９は電源スイッチ、１０
はドリルスイッチ、１１は整流ブリッジ、１２は電磁コ
イル、１３および１４は各半導体制御素子、１５及び１
６は各点弧回路、１７はリミットスイッチ、１８は整流
ブリッジ、１９は電圧検出回路、２０はリレー、２１は
電圧／周波数変換回路、２２は電流検出回路、２３は回
転信号発生回路、２４は電源回路、２５はマイクロコン
ピュータ、２６はドライバである。1 is a drill stand, 2 is a main motor, 3 is an electric drill,
4 is a feed motor, 5 is a control box, 6 is an electromagnetic base,
7 is a cutting tool, 8 is an AC power supply, 9 is a power switch, 10
Is a drill switch, 11 is a rectifying bridge, 12 is an electromagnetic coil, 13 and 14 are semiconductor control elements, 15 and 1
6 is each firing circuit, 17 is a limit switch, 18 is a rectifier bridge, 19 is a voltage detection circuit, 20 is a relay, 21 is a voltage / frequency conversion circuit, 22 is a current detection circuit, 23 is a rotation signal generation circuit, and 24 is A power supply circuit, 25 is a microcomputer, and 26 is a driver.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 須藤 淳一 茨城県勝田市武田1060番地 日立工機株式 会社内 (72)発明者 片岡 健治 茨城県勝田市武田1060番地 日立工機株式 会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junichi Sudo 1060 Takeda, Katsuta-shi, Ibaraki Hitachi Koki Co., Ltd. (72) Inventor Kenji Kataoka 1060 Takeda, Katsuta-shi, Ibaraki Hitachi Koki Co., Ltd.
Claims (1)
電動機により該主電動機と切削工具を支持する電気ドリ
ル部を移動せしめて切削加工を行う切削装置において、
前記主電動機の電流を検出する電流検出器と、該電流検
出器の出力により前記主電動機の電流が所定値となるよ
うに前記切削工具の送り速度を調整し前記主電動機の過
負荷を検出した場合、前記主電動機の定電流制御値を下
げる制御回路を備えたことを特徴とする切削制御装置。1. A cutting device for performing cutting by rotating a cutting tool by a main electric motor and moving an electric drill portion supporting the main electric motor and the cutting tool by a feed electric motor,
An electric current detector for detecting the electric current of the main electric motor, and the output of the electric current detector adjusts the feed speed of the cutting tool so that the electric current of the main electric motor becomes a predetermined value, and detects an overload of the main electric motor. In this case, the cutting control device is provided with a control circuit that lowers the constant current control value of the main motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29974492A JPH06143015A (en) | 1992-11-10 | 1992-11-10 | Cutting controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29974492A JPH06143015A (en) | 1992-11-10 | 1992-11-10 | Cutting controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06143015A true JPH06143015A (en) | 1994-05-24 |
Family
ID=17876449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29974492A Pending JPH06143015A (en) | 1992-11-10 | 1992-11-10 | Cutting controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06143015A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007074647A1 (en) * | 2005-12-26 | 2007-07-05 | Nitto Kohki Co., Ltd. | Portable drilling machine |
-
1992
- 1992-11-10 JP JP29974492A patent/JPH06143015A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007074647A1 (en) * | 2005-12-26 | 2007-07-05 | Nitto Kohki Co., Ltd. | Portable drilling machine |
| JP2007196362A (en) * | 2005-12-26 | 2007-08-09 | Nitto Kohki Co Ltd | Portable drilling machine |
| JP4628980B2 (en) * | 2005-12-26 | 2011-02-09 | 日東工器株式会社 | Portable drilling machine |
| US7936142B2 (en) | 2005-12-26 | 2011-05-03 | Nitto Kohki Co., Ltd. | Portable drilling device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4412158A (en) | Speed control circuit for an electric power tool | |
| JP2800570B2 (en) | Automatic drilling machine | |
| JPS6077694A (en) | Method and device for controlling motor automatically decelerated at rotating speed at no load idling time | |
| CA1284817C (en) | Excitation control apparatus for synchronous machine | |
| GB2206751A (en) | Starting a variable speed constant frequency generating system | |
| JPH06143015A (en) | Cutting controller | |
| US4550281A (en) | Synchronous motor control | |
| JP2002327687A (en) | Pre-heating control device of compressor | |
| JPH06143016A (en) | Cutting controller | |
| GB2176916A (en) | Circuit arrangement for controlling starting current of a motor | |
| JPH08290312A (en) | Cutting control device | |
| JPH08108306A (en) | Cutting controller | |
| JP2664442B2 (en) | Drive circuit for commutatorless motor | |
| JPS6329520B2 (en) | ||
| JPS62213909A (en) | Drill | |
| JPS6074998A (en) | Control system for engine drive generator | |
| JP2539065B2 (en) | Cutting control device | |
| JPH04341803A (en) | Automatic feed concrete core drill | |
| JPH06319264A (en) | Inverter controller | |
| JP2007020324A (en) | Control method for permanent-magnet synchronous motor | |
| JPH01218917A (en) | Driving control device for vehicle air conditioning compressor | |
| JPS6016196A (en) | Voltage and speed controller of water wheel power generator | |
| JP4146570B2 (en) | AC motor drive controller | |
| JP3424567B2 (en) | Air conditioner fan motor drive | |
| JPH06315292A (en) | Equipment for controlling speed of motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20021001 |