JPH03213246A - Cutting control device - Google Patents
Cutting control deviceInfo
- Publication number
- JPH03213246A JPH03213246A JP1107890A JP1107890A JPH03213246A JP H03213246 A JPH03213246 A JP H03213246A JP 1107890 A JP1107890 A JP 1107890A JP 1107890 A JP1107890 A JP 1107890A JP H03213246 A JPH03213246 A JP H03213246A
- Authority
- JP
- Japan
- Prior art keywords
- current
- electric motor
- cutting
- motor
- load
- 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
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 56
- 239000004065 semiconductor Substances 0.000 abstract description 8
- 238000005553 drilling Methods 0.000 abstract description 7
- 238000003754 machining Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Automatic Control Of Machine Tools (AREA)
- Drilling And Boring (AREA)
Abstract
Description
【発明の詳細な説明】
〔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制御装置に関わ
り、とくに切削トルクを最適、かつ自動的に制御するこ
とのできる切削制御装置に係る。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a control device for a rotary cutting tool such as a drilling machine, and particularly relates to a cutting control device that can optimally and automatically control cutting torque. .
従来の切削用工具は主電動機により回転される切削工具
とスイッチ盤等を備えた電気ドリルをドリルスタンドに
より支持し、送り電動機により切削送りが与えられるよ
うになっていた。また、被穿孔物は電磁的に吸着固定さ
れるようになっていた。In conventional cutting tools, an electric drill equipped with a cutting tool rotated by a main electric motor, a switch panel, etc. is supported by a drill stand, and cutting feed is given by a feed motor. Further, the object to be drilled is electromagnetically attracted and fixed.
上記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。In the conventional cutting tool described above, the load torque acting on the cutting tool changes in proportion to the feed rate of the cutting tool, and furthermore, the load torque is proportional to the current of the main motor.
The feed rate of the cutting tool is adjusted so that the current of the main motor becomes a predetermined value, and the load torque is maintained at a predetermined value.
上記従来技術では、上位装置内の各種軸受、送り装置、
歯車機構等に用いる潤滑油の粘性が温度その他の原因に
より変化するので、機械損が変動し、これにより負荷ト
ルクが変動して切削工具の切れ味を悪くし、また、その
寿命を縮めるという問題があった。In the above conventional technology, various bearings, feeding devices,
As the viscosity of the lubricating oil used in gear mechanisms changes due to temperature and other factors, the mechanical loss changes, which causes the load torque to change, making the cutting tool less sharp and shortening its life. there were.
本発明の目的は、上記切削工具の機械損変動を補償して
、切削工具の切れ味を向上させ、またこれを長寿命化す
ることのできる切削制御装置を提供することにある。An object of the present invention is to provide a cutting control device that can compensate for mechanical loss fluctuations in the cutting tool, improve the sharpness of the cutting tool, and extend the life of the tool.
[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、上記主電動機の電
流を検出して上記負荷トルク値判定し、上記送り電動機
の電流を制御して上記負荷トルク値を所定の値に保つよ
うにする。[Means for Solving the Problems] In order to solve the above problems, the present invention detects the current of the main motor to determine the load torque value, and controls the current of the transmission motor to determine the load torque value. Make sure to keep it at the specified value.
又、電流検出器が検出する上記主電動機の無負荷電流と
、上記負荷トルク値に対して規定される上記主電動機の
負荷電流成分とを加算し、上記加算値と上記電流検出器
が検出する主電動機負荷電流とを比較して、上記送り電
動機電流を制御するようにする。Further, the no-load current of the traction motor detected by the current detector and the load current component of the traction motor defined for the load torque value are added, and the added value and the current detector detect the added value. The transmission motor current is controlled by comparing the main motor load current with the main motor load current.
さらに、上記無負荷電流を上記主電動機のパルス状起動
電流の終了後に上記電流検出器により検出するようにす
る。Furthermore, the no-load current is detected by the current detector after the pulsed starting current of the main motor ends.
以上のように構成した本発明の切削制御装置は、実際の
切削加工に関与しない無負荷電流と実際の切削加工に必
要な負荷電流とを加算した電流値を切削加工用主電動機
電流として制御するので。The cutting control device of the present invention configured as described above controls the current value obtained by adding the no-load current not involved in the actual cutting process and the load current necessary for the actual cutting process as the main motor current for the cutting process. So.
切削トルクを所要値に正確に設定することができる。Cutting torque can be set accurately to the required value.
さらに、切削工具の送り速度を制御して上記加算電流値
を所定の値に維持するようにするので、上記切削トルク
の変動を防止する。Furthermore, since the feed rate of the cutting tool is controlled to maintain the added current value at a predetermined value, fluctuations in the cutting torque are prevented.
第1図は本発明の1実施例の回路図、第2図は第1図に
おける本発明の制御手順を示すフローチャートである。FIG. 1 is a circuit diagram of one embodiment of the present invention, and FIG. 2 is a flowchart showing the control procedure of the present invention in FIG.
以下、第2図の手順に従って第1図に示す回路の動作を
説明する。The operation of the circuit shown in FIG. 1 will be explained below according to the procedure shown in FIG.
第2図におけるスタートは、切削工具8を電気ドリル3
に固定し、第1図に示す切替つまみ7により電源スィッ
チ10を投入する手順に相当する、電源スィッチ10が
投入されると電源9は整流ブリッジ12により整流され
、電磁コイル13に電流を流して被穿孔物を吸着固定す
る。At the start in Fig. 2, the cutting tool 8 is inserted into the electric drill 3.
When the power switch 10 is turned on, the power supply 9 is rectified by the rectifier bridge 12, and current flows through the electromagnetic coil 13. The object to be drilled is fixed by suction.
次いで第2図の手順401では、切替つまみ7を自動ス
イッチ側に移し第1図の自動スイッチ11を閉じると、
自動スイッチ検出手段111が自動スイッチ11のオン
状態を検出しマイクロコンピュータ24の入力ポート2
47に伝える。これに応じてマイクロコンピュータ24
は主電動機2の定速回転信号を出力ポート248、ドラ
イバ25、点弧回路16の順で半導体制御素子14に伝
え主電動機2を一定回転数で回転させる。このとき切削
工具8は未だ被切削物に接触していない、なお、上記定
速回転信号は点弧回路16内の抵抗161を介して光結
合素子162内の発光素子に印加されこれを発光させ、
受光素子により電気信号に変換されて半導体制御素子1
4のゲートに印加される。Next, in step 401 of FIG. 2, when the switching knob 7 is moved to the automatic switch side and the automatic switch 11 of FIG. 1 is closed,
The automatic switch detection means 111 detects the on state of the automatic switch 11 and detects the on state of the automatic switch 11 and outputs the input port 2 of the microcomputer 24.
Tell 47. Accordingly, the microcomputer 24
transmits a constant speed rotation signal of the main motor 2 to the semiconductor control element 14 in this order through the output port 248, the driver 25, and the ignition circuit 16 to rotate the main motor 2 at a constant rotation speed. At this time, the cutting tool 8 is not in contact with the object to be cut yet, and the constant speed rotation signal is applied to the light emitting element in the optical coupling element 162 via the resistor 161 in the ignition circuit 16, causing it to emit light. ,
It is converted into an electric signal by the light receiving element and sent to the semiconductor control element 1.
Applied to the gate of 4.
第2図の手順402では、上記主電動機2の起動電流を
電流検出機22により検出し、信号変換回路23により
整流平滑並びにレベル変換し、アナログ/デジタル変換
器245によりデジタル信号に変換しててマイクロコン
ピュータ24に伝達する。In step 402 in FIG. 2, the starting current of the main motor 2 is detected by the current detector 22, rectified, smoothed and level-converted by the signal conversion circuit 23, and converted into a digital signal by the analog/digital converter 245. The information is transmitted to the microcomputer 24.
これによりマイクロコンピュータ24は上記起動電流の
終了を検出して次の手順403に移行する。As a result, the microcomputer 24 detects the end of the starting current and proceeds to the next step 403.
第3図は上記主電動機電流の電流波形である。FIG. 3 shows the current waveform of the main motor current.
起動直後にパルス状の起動電流が発生し、その後無負荷
電流が流れる。A pulse-like starting current occurs immediately after startup, and then a no-load current flows.
上記起動電流の終了後は主電動機2の無負荷定常電流が
検出されるので1手順403では上記無負荷定常電流I
nを記憶する。なお、上記起動電流の発生期間より長い
所定時間、上記電流検出動作を停止させ、その後に上記
無負荷定常電流Inを検出するようにすることもできる
。After the above-mentioned starting current ends, the no-load steady-state current of the main motor 2 is detected, so in step 1 403, the above-mentioned no-load steady-state current I
Memorize n. Note that it is also possible to stop the current detection operation for a predetermined time longer than the generation period of the starting current, and then detect the no-load steady current In.
次の手順404では、マイクロコンピュータ24により
実際の一定トルク切削に対応する電流値Itを算出して
主電動機の定電流制御値(In+It)を算出する。上
記It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
出されるものでもよい。上記(In十It)は第3図に
おける穿孔開始から穿孔終了までの電流値に相当する次
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24
内の出力ポート248からドライバ251点弧回路17
を介して半導体制御素子15に制御信号が送出され送り
電動機4が駆動される。点弧回路17の回路構成は点弧
回路16と同様である。In the next step 404, the microcomputer 24 calculates a current value It corresponding to actual constant torque cutting, and calculates a constant current control value (In+It) of the main motor. The above-mentioned It may be a value stored in a memory device corresponding to the cutting conditions, or may be calculated from the above-mentioned cutting conditions according to a predetermined arithmetic expression. The above (In + It) corresponds to the current value from the start of drilling to the end of drilling in FIG.
lower. In this operation, the microcomputer 24
Output port 248 in driver 251 ignition circuit 17
A control signal is sent to the semiconductor control element 15 via the semiconductor control element 15, and the sending motor 4 is driven. The circuit configuration of the ignition circuit 17 is similar to that of the ignition circuit 16.
次の手順406では主電動機2の電流の増加から被穿孔
物の穿孔開始が検出される。In the next step 406, the start of drilling of the object to be drilled is detected from an increase in the current of the main motor 2.
その次の手M407で上記送り電動機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。In the next step M407, the current control of the main motor 2 by the transmission motor 4 is performed. That is, when the current of the main motor 2 increases, the feed motor 4 is decelerated to reduce the load on the cutting tool, and conversely, when the current of the main motor 2 decreases, the feed motor 4 is accelerated to reduce the load on the cutting tool. The current of the main motor 2 is maintained at a predetermined value by increasing this load.
次の手順408では、主電動機電流の上記無負荷電流I
n復帰を検出し1手順409にて送り電動機4を停止さ
せる。上記送り電動機4の停止では、マイクロコンピュ
ータ24から半導体制御素子15に送られる送り電動機
4の駆動信号を停止し、同時にリレー27を常閉接点側
に切り替えて送り電動機4を制御するようにする。なお
271はドライバ25により駆動される上記リレー27
の駆動コイルである。In the next step 408, the above no-load current I of the traction motor current is
n return is detected and the sending motor 4 is stopped in Step 1 409. In stopping the feed motor 4, the drive signal for the feed motor 4 sent from the microcomputer 24 to the semiconductor control element 15 is stopped, and at the same time, the relay 27 is switched to the normally closed contact side to control the feed motor 4. Note that 271 is the relay 27 driven by the driver 25.
This is the drive coil.
吹の手順410では送り電動機4を逆転させて電気ドリ
ル3を上昇させる。この動作ではマイクロコンピュータ
24の指令によりドライバ25を介してリレー26が駆
動される。In the blowing step 410, the electric drill 3 is raised by reversing the feed motor 4. In this operation, the relay 26 is driven via the driver 25 according to a command from the microcomputer 24.
次の手順411では、電気ドリル3が上昇してリミット
スイッチ18を作動させたことを検知する。上記作動信
号は上限スイッチ状態検手段181により検知され、入
力ポート247を介してマイクロコンピュータ24に入
力される。In the next step 411, it is detected that the electric drill 3 has risen and the limit switch 18 has been activated. The actuation signal is detected by the upper limit switch state detection means 181 and input to the microcomputer 24 via the input port 247.
次の手順412では、マイクロコンピュータ24から半
導体制御素子15に送られる送り電動@4の上昇信号を
停止し、同時にリレー27を常閉接点側に切り替えて送
り電動機4を制動して停止させ穿孔工程を終了する。In the next step 412, the rising signal of the feed motor @4 sent from the microcomputer 24 to the semiconductor control element 15 is stopped, and at the same time, the relay 27 is switched to the normally closed contact side to brake and stop the feed motor 4, and the drilling process is performed. end.
第4図は上記本発明による切削用工具の外観図の一例で
ある。第4図において、主電動機2により回転される切
削工具8と、電源投入と自動スイッチの切替等を行う切
替つまみ7等を備えた電気ドリル2がドリルスタンド1
に支持されて送り電動機4により切削送りが与えられる
ようになっている。この際、被穿孔物は電磁ベース6に
より電磁的に吸着固定される。FIG. 4 is an example of an external view of the cutting tool according to the present invention. In FIG. 4, a drill stand 1 shows an electric drill 2 equipped with a cutting tool 8 rotated by a main electric motor 2 and a switching knob 7 for turning on the power and switching an automatic switch.
The cutting feed is applied by a feed motor 4. At this time, the object to be drilled is electromagnetically attracted and fixed by the electromagnetic base 6.
上記第4図の本発明実施例装置においては、第1図に示
した本発明による制御回路が制御ボックス5内に収容さ
れ、送り電動機4を制御する。制御ボックス5と送り電
動機4が本発明により新しく設けられた部分である。In the apparatus according to the embodiment of the invention shown in FIG. 4, the control circuit according to the invention shown in FIG. The control box 5 and the feed motor 4 are newly provided parts according to the present invention.
本発明によれば、切削加工用主電動機電流を実際の切削
加工に関与しない無負荷電流と実際の切削加工に必要な
負荷電流との加算値とするので、被加工物を最適な切削
トルクにて加工することができる。According to the present invention, the main motor current for cutting is the sum of the no-load current that is not involved in the actual cutting and the load current necessary for the actual cutting, so the workpiece is adjusted to the optimum cutting torque. It can be processed using
さらに、切削工具の送り速度を制御して上記加算電流値
を最適値に維持するので、上記切削トルクの変動を防止
することができる。Furthermore, since the feed rate of the cutting tool is controlled to maintain the added current value at the optimum value, fluctuations in the cutting torque can be prevented.
この結果、切削加工の効率を向上し、同時に切削工具を
長寿命化することができる。As a result, the efficiency of cutting can be improved and the life of the cutting tool can be extended at the same time.
第1図は本発明による切削制御装置の実施例回路図、第
2図は本発明実施例のフローチャート。
第3図は本発明における切削用電動機電流の波形図、第
4図は本発明による切削装置の外観図である。
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は切替つまみ、8は切削工具、9は交流電源、10は
電源スィッチ、11は自動スイッチ、12は整流ブリッ
ジ、13は電磁コイル、14および15は各半導体制御
素子、16および17は各点弧回路、18は上限リミッ
トスイッチ、19は回転信号発生回路、20は電源回路
21は零電圧検出回路、22は電流検出器、23は信号
変換回路、24はマイクロコンピュータ、25はドライ
バ、26および27は各リレー28はブレーキ用抵抗。FIG. 1 is a circuit diagram of an embodiment of a cutting control device according to the present invention, and FIG. 2 is a flow chart of the embodiment of the present invention. FIG. 3 is a waveform diagram of cutting motor current according to the present invention, and FIG. 4 is an external view of the cutting device according to the present invention. 1 is a drill stand, 2 is a main motor, 3 is an electric drill,
4 is a sending motor, 5 is a control box, 6 is an electromagnetic base,
7 is a switching knob, 8 is a cutting tool, 9 is an AC power supply, 10 is a power switch, 11 is an automatic switch, 12 is a rectifier bridge, 13 is an electromagnetic coil, 14 and 15 are each semiconductor control element, 16 and 17 are each point arc circuit, 18 is an upper limit switch, 19 is a rotation signal generation circuit, 20 is a power supply circuit, 21 is a zero voltage detection circuit, 22 is a current detector, 23 is a signal conversion circuit, 24 is a microcomputer, 25 is a driver, 26 and 27 is a relay, and 28 is a brake resistor.
Claims (1)
り上記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、上記主電
動機の電流を検出する電流検出器と、上記電流検出器の
出力により上記送り電動機の電流を制御する制御回路と
を備えたことを特徴とする切削制御措置。 2、請求項1において、上記主電動機の無負荷電流の記
憶装置と、上記主電動機の負荷電流の記憶装置または上
記負荷電流を算出する演算装置とを備え、上記制御回路
により、上記負荷電流記憶装置が記憶する負荷電流値ま
たは上記演算装置が算出する負荷電流値と上記無負荷電
流記憶装置が記憶する無負荷電流値とを加算し、上記加
算値と上記電流検出器が検出する主電動機負荷電流とを
比較して上記送り電動機電流を制御するようにしたこと
を特徴とする切削制御装置。 3、請求項1および2において、上記制御回路は上記主
電動機の電流検出器が検出する上記主電動機のパルス状
の起動電流を識別する機能、または上記起動電流の発生
時間幅を設定するタイマ装置を備え、上記起動電流の終
了後に上記主電動機の無負荷電流を検出するようにした
ことを特徴とする切削制御装置。[Claims] 1. In a cutting device that performs cutting by rotating a cutting tool by a main electric motor and moving an electric drill part that supports the main motor and the cutting tool by a feeding motor, the electric current of the main motor is A cutting control device comprising: a current detector for detecting the current; and a control circuit for controlling the current of the feed motor based on the output of the current detector. 2. Claim 1, further comprising: a storage device for the no-load current of the traction motor; and a storage device for the load current of the traction motor or an arithmetic device for calculating the load current; The load current value stored in the device or the load current value calculated by the arithmetic unit is added to the no-load current value stored in the no-load current storage device, and the added value and the traction motor load detected by the current detector are calculated. A cutting control device characterized in that the feed motor current is controlled by comparing the current with the current. 3. In claims 1 and 2, the control circuit has a function of identifying a pulsed starting current of the traction motor detected by a current detector of the traction motor, or a timer device that sets the generation time width of the starting current. A cutting control device comprising: detecting a no-load current of the main motor after the starting current ends.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011078A JP2539065B2 (en) | 1990-01-19 | 1990-01-19 | Cutting control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011078A JP2539065B2 (en) | 1990-01-19 | 1990-01-19 | Cutting control device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03213246A true JPH03213246A (en) | 1991-09-18 |
JP2539065B2 JP2539065B2 (en) | 1996-10-02 |
Family
ID=11767948
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011078A Expired - Lifetime JP2539065B2 (en) | 1990-01-19 | 1990-01-19 | Cutting control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2539065B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040005058A (en) * | 2002-07-08 | 2004-01-16 | 현대자동차주식회사 | Hole piercing confirmation system using drill cutting load |
JP2007175827A (en) * | 2005-12-28 | 2007-07-12 | Nachi Fujikoshi Corp | Drilling device for resin part, drilling robot system for resin part and drilling method for resin part |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4914832A (en) * | 1972-06-05 | 1974-02-08 |
-
1990
- 1990-01-19 JP JP2011078A patent/JP2539065B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4914832A (en) * | 1972-06-05 | 1974-02-08 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040005058A (en) * | 2002-07-08 | 2004-01-16 | 현대자동차주식회사 | Hole piercing confirmation system using drill cutting load |
JP2007175827A (en) * | 2005-12-28 | 2007-07-12 | Nachi Fujikoshi Corp | Drilling device for resin part, drilling robot system for resin part and drilling method for resin part |
Also Published As
Publication number | Publication date |
---|---|
JP2539065B2 (en) | 1996-10-02 |
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