JPH035405Y2 - - Google Patents
Info
- Publication number
- JPH035405Y2 JPH035405Y2 JP1985068636U JP6863685U JPH035405Y2 JP H035405 Y2 JPH035405 Y2 JP H035405Y2 JP 1985068636 U JP1985068636 U JP 1985068636U JP 6863685 U JP6863685 U JP 6863685U JP H035405 Y2 JPH035405 Y2 JP H035405Y2
- Authority
- JP
- Japan
- Prior art keywords
- detection
- tool
- workpiece
- processing machine
- contact
- 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.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 58
- 238000012545 processing Methods 0.000 claims description 27
- 230000005284 excitation Effects 0.000 description 12
- 230000003321 amplification Effects 0.000 description 9
- 238000003199 nucleic acid amplification method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000010730 cutting oil Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 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
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
- B23Q17/2233—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work for adjusting the tool relative to the workpiece
- B23Q17/2241—Detection of contact between tool and workpiece
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machine Tool Sensing Apparatuses (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、加工機において工具とワークの接触
を検知するための装置に関し、例えば加工機にお
けるワークの芯出しや加工の開始点を検知するた
めに利用される。[Detailed description of the invention] (Industrial application field) The present invention relates to a device for detecting contact between a tool and a workpiece in a processing machine, for example, detecting the centering of a workpiece or the starting point of machining in a processing machine. used for.
（従来技術）
従来より、加工機の工具とワークとの接触によ
つて生起する電磁気的現象を利用して加工の開始
点とすることは公知である。ところが一般の加工
機においては、工具を支持する主軸部が回転する
ため、その高速回転時には主軸部のベアリング内
で形成される油膜により、工具がフレームに対し
て絶縁された状態となり、工具とワークの接触を
検知するのが比較的困難である。本願考案の考案
者は、そのような状態においても工具とワークの
接触を検知可能な改良された装置を、先に特願昭
60−53010号として提案した。その装置にあつて
は、加工機の主軸部が回転してベアリングが油膜
により絶縁状態になつた場合でも、そこに存在す
る静電容量を通じて加工機に流れる僅かなループ
電流を検知するようになつているため、検出感度
が高く（つまり検知レベルが低く）設定されるこ
とになる。ところが、加工機の主軸部が停止して
いるときに、ワークの芯出しや寸法測定、または
工具の長さや径の寸法補正などのために、工具と
ワークとの接触位置を検知する必要性が生じる。
この場合においては、工具とワークが接近すると
これらが非接触であつても、工具やワークに付着
した金属粉または切削油等を通じてある程度のル
ープ電流が加工機に流れるため、前述のような高
感度の検知装置では誤動作を起こすおそれがあ
り、作動に安定性を欠くという問題がある。(Prior Art) Conventionally, it has been known to use an electromagnetic phenomenon caused by contact between a tool of a processing machine and a workpiece as a starting point for processing. However, in general processing machines, the main shaft that supports the tool rotates, so when the main shaft rotates at high speeds, the tool is insulated from the frame by an oil film that forms inside the main shaft bearing, and the tool and workpiece are insulated. contact is relatively difficult to detect. The inventor of the present invention previously proposed an improved device that can detect contact between a tool and a workpiece even under such conditions in a patent application.
It was proposed as No. 60-53010. With this device, even when the main shaft of the processing machine rotates and the bearing becomes insulated due to the oil film, the small loop current flowing to the processing machine is detected through the capacitance that exists there. Therefore, the detection sensitivity is set high (that is, the detection level is low). However, when the main shaft of the processing machine is stopped, it is necessary to detect the contact position between the tool and the workpiece in order to center the workpiece, measure its dimensions, or correct the length and diameter of the tool. arise.
In this case, when the tool and workpiece come close to each other, even if they are not in contact, a certain amount of loop current flows through the processing machine through metal powder or cutting oil attached to the tool or workpiece, so the high-sensitivity There is a problem with this detection device that it may malfunction and lack stability in operation.
（考案が解決しようとする問題点）
本考案は、上述の問題に鑑みてなされたもの
で、加工機の主軸部が回転または停止のいずれの
状態であつても、工具とワークの接触を安定して
検知するためのものであり、そのための技術的手
段は、回転する主軸部３を有する加工機１に取付
けられ該加工機の工具４とワーク５の接触を電磁
的に検知する検知コイル１０と、該検知コイルの
出力信号から工具とワークの接触を意味する検知
信号を得るための検知部２０とよりなり、該検出
部２０は、加工機の主軸部３が回転状態または停
止状態のいずれかの状態に応じて、検知信号を得
るための検知レベルを低レベルまたは高レベルの
いずれかに外部信号により切替える切替えスイツ
チ２３を有してなることを特徴とするものであ
る。(Problems to be solved by the invention) The present invention has been made in view of the above-mentioned problems, and it maintains stable contact between the tool and the workpiece regardless of whether the main shaft of the processing machine is rotating or stopped. The technical means for this purpose is a detection coil 10 that is attached to a processing machine 1 having a rotating main shaft portion 3 and electromagnetically detects contact between a tool 4 of the processing machine and a workpiece 5. and a detection section 20 for obtaining a detection signal indicating contact between the tool and the workpiece from the output signal of the detection coil. The device is characterized in that it has a changeover switch 23 that switches the detection level for obtaining a detection signal to either a low level or a high level depending on the state.
（実施例）
以下、本考案を実施例に基づき図面を参照しな
がら説明する。(Example) The present invention will be described below based on an example with reference to the drawings.
第１図において、加工機１は、フレーム２に対
して主軸部３が移動し、主軸部３に取付けられた
工具４がワーク５に接触して加工を行うようにな
つている。この工具４とワーク５との接触を検知
するために、主軸部３にこれが貫通するように取
付けられた環状のセンサー部６と、制御部１８と
からなる検知装置が設けられている。 In FIG. 1, a processing machine 1 has a main shaft 3 that moves relative to a frame 2, and a tool 4 attached to the main shaft 3 contacts a workpiece 5 to perform processing. In order to detect contact between the tool 4 and the workpiece 5, a detection device consisting of an annular sensor section 6 attached to the main shaft section 3 so as to penetrate therethrough, and a control section 18 is provided.
第２図をも参照にして、センサー部６は、フエ
ライト等の磁性材料からなる円環状のコア８，１
１にそれぞれコイル９，１２が一様に巻かれてな
る励起コイル７及び検知コイル１０を、これらの
間に鉄板等の磁性体よりなる円環状の遮へい板１
３を挟んで互に接近して配置されている。さらに
具体的には、第３図Ａにその断面を示すように、
励起コイル７、検知コイル１０及び遮へい板１３
は、アルミニウム等の金属材料からなる円環状で
断面コ字状のケーシング１４内に収納され、合成
樹脂１５が注封されて固定されたうえ合成樹脂か
らなるカバー１６で被覆されている。励起コイル
７及び検知コイル１０は、絶縁のためケーシング
１４とは接触しないようになつており、遮へい板
１３はケーシング１４の両方の側壁１４ａ，１４
ｂとは同時に接触しないようになつている。ケー
シング１４の外周部には取付け用のフランジ部１
４ｃが設けられており、ボルト１７によつて加工
機１に取付けられている。 Referring also to FIG. 2, the sensor section 6 has an annular core 8,1 made of a magnetic material such as ferrite.
An excitation coil 7 and a detection coil 10 each having coils 9 and 12 uniformly wound around the coil 1 are interposed between them, and an annular shielding plate 1 made of a magnetic material such as an iron plate is placed between them.
They are arranged close to each other with 3 in between. More specifically, as the cross section is shown in Figure 3A,
Excitation coil 7, detection coil 10 and shielding plate 13
is housed in an annular casing 14 made of a metal material such as aluminum and having a U-shaped cross section, a synthetic resin 15 is potted and fixed, and the casing 14 is covered with a cover 16 made of synthetic resin. The excitation coil 7 and the detection coil 10 are designed not to contact the casing 14 for insulation, and the shielding plate 13 is connected to both side walls 14a, 14 of the casing 14.
It is designed so that it does not come into contact with b at the same time. A flange portion 1 for mounting is provided on the outer periphery of the casing 14.
4c is provided and is attached to the processing machine 1 with bolts 17.
制御部１８は、第２図に示すように、励起コイ
ル７に高周波電流を流すための電源部１９と、検
知コイル１０の出力信号から検知信号を得るため
の検出部２０とからなつており、これが一個の筐
体内に収納されて加工機１の制御盤内に取付けら
れ結線されるようになつている。電源部１９は、
数ＫHzから数百ＫHzの発振回路及び電力増幅回路
等からなり、周波数及び出力電力の調整が可能と
なつている。 As shown in FIG. 2, the control unit 18 includes a power supply unit 19 for passing a high-frequency current through the excitation coil 7, and a detection unit 20 for obtaining a detection signal from the output signal of the detection coil 10. This is housed in a single casing, installed in the control panel of the processing machine 1, and wired. The power supply section 19 is
It consists of an oscillation circuit of several KHz to several hundred KHz, a power amplification circuit, etc., and the frequency and output power can be adjusted.
第４図において、検出部２０は、増幅度が高く
設定された低入力増幅器２１と増幅度が低く設定
された高入力増幅器２２とを有し、これらの出力
が外部信号により切換えられるスイツチ２３によ
つて選択されるようになつており、そのあとに、
検波器２４、波形整形器２５、積分器２６及び出
力部２７が接続されている。２１ａ，２２ａは増
幅度を調整する調整器である。スイツチ２３は、
例えば外部信号によつて切換えられるリレーの接
点であつて、主軸部３が高速回転している状馳で
は低入力増幅器２１に接続し、そうでない場合、
つまり主軸部３が低速回転か停止している状態で
は高入力増幅器２２に接続するように切換えられ
る。つまり、主軸部３が回転して工具４が前述の
ように絶縁状態となつているときは、検知コイル
１０の出力信号Ｓ１はレベルが低いので、増幅度
を高くして検知レベルを低レベルにし、主軸部３
が停止しているときは、検知コイル１０の出力信
号Ｓ１はレベルが高いので、誤作動を防止するた
めに増幅度を低くして検知レベルを高レベルにし
ているのである。 In FIG. 4, the detection unit 20 has a low input amplifier 21 whose amplification degree is set to high and a high input amplifier 22 whose amplification degree is set to a low degree, and the outputs of these are connected to a switch 23 that is switched by an external signal. After that,
A detector 24, a waveform shaper 25, an integrator 26, and an output section 27 are connected. 21a and 22a are regulators for adjusting the degree of amplification. The switch 23 is
For example, it is a contact of a relay that is switched by an external signal, and when the main shaft section 3 is rotating at high speed, it is connected to the low input amplifier 21, and when it is not, it is connected to the low input amplifier 21.
That is, when the main shaft section 3 is rotating at a low speed or is stopped, the connection is switched to the high input amplifier 22. In other words, when the spindle 3 rotates and the tool 4 is in the insulated state as described above, the output signal S1 of the detection coil 10 is low in level, so the amplification is increased to lower the detection level. , main shaft part 3
When the detection coil 10 is stopped, the output signal S1 of the detection coil 10 is at a high level, so in order to prevent malfunction, the amplification degree is lowered and the detection level is set to a high level.
その動作をスイツチ２３が高増幅器２１のがわ
に切換えられている場合について説明すると、第
５図に波形の変化を示すように、検知コイル１０
の出力信号Ｓ１を増幅して検波し、一定レベル以
上の信号に対しては一定の波形のパルスに変換
し、そのパルスが一定個数（ここでは３個）以上
連続した場合に検知信号Ｓ７を出力する。第５図
において、Ｓ１，Ｓ２，Ｓ４，Ｓ５，Ｓ６及びＳ
７は、主軸部３が回転している場合における第４
図の同符号の箇所の信号状態を示し、時刻t1にお
いて工具４とワーク５とが接触し、時刻t2におい
て検知信号Ｓ７がオンとなつて出力される様子が
示されている。 To explain the operation when the switch 23 is switched to the side of the high amplifier 21, as shown in FIG.
The output signal S1 is amplified and detected, and signals above a certain level are converted into pulses with a certain waveform, and a detection signal S7 is output when a certain number of pulses (three in this case) or more continues. do. In FIG. 5, S1, S2, S4, S5, S6 and S
7 is the fourth when the main shaft portion 3 is rotating.
The signal state at the same reference numerals in the figure is shown, and shows how the tool 4 and workpiece 5 come into contact at time t1 , and the detection signal S7 is turned on and output at time t2 .
つまり、電源部１９によつて励起コイル７のコ
イル９には高周波電流が流れ、コア１０に高周波
磁界が発生する。加工機１の工具４とワーク５と
が接触すると、この高周波磁界によつて第１図に
示すようにフレーム２、主軸部３、工具４及びワ
ーク５をループ状に流れる高周波電流Ｈが生じ
る。高周波電流Ｈによつて検知コイル１０のコア
１１に高周波磁界が発生し、これがコイル１２に
高周波電流を誘起して検知コイル１０の出力信号
Ｓ１となる。この出力信号Ｓ１が、上述したよう
に検出部２０で処理されて検知信号Ｓ７が出力さ
れる。積分器２６は単発性の雑音による誤動作を
防止するためのものであるが、これによつて応答
に遅れ時間（t2−t1）が生じるが、電源部１９の
周波数が高いためこの遅れ時間は僅かですみ、実
用上何らさしつかえない。このように、主軸部３
が高速回転している場合には、ベアリング部分が
油膜によつて直流的には絶縁状態となつている
が、高周波に対してはその部分の静電容量によつ
て有限値のリアクタンスとして働き、高周波電流
Ｈが生じるのでこれを検知コイル１０によつて信
号Ｓ１として検知し、低入力増幅器２１によつて
大きく増幅することによつて検知信号Ｓ７が得ら
れるのである。 That is, a high frequency current flows through the coil 9 of the excitation coil 7 by the power supply section 19, and a high frequency magnetic field is generated in the core 10. When the tool 4 of the processing machine 1 and the workpiece 5 come into contact, the high-frequency magnetic field generates a high-frequency current H that flows in a loop through the frame 2, the main shaft portion 3, the tool 4, and the workpiece 5, as shown in FIG. A high frequency magnetic field is generated in the core 11 of the sensing coil 10 by the high frequency current H, which induces a high frequency current in the coil 12, which becomes the output signal S1 of the sensing coil 10. This output signal S1 is processed by the detection section 20 as described above, and a detection signal S7 is output. The integrator 26 is intended to prevent malfunctions due to single-shot noise, but this causes a delay time (t 2 - t 1 ) in the response; however, because the frequency of the power supply section 19 is high, this delay time It is only a small amount, and there is no practical problem. In this way, the main shaft portion 3
When the bearing is rotating at high speed, the bearing part is insulated from direct current by the oil film, but at high frequencies it acts as a finite value reactance due to the capacitance of that part. Since a high frequency current H is generated, this is detected by the detection coil 10 as a signal S1, and by greatly amplifying it by the low input amplifier 21, a detection signal S7 is obtained.
高入力増幅器２２は、低入力増幅器２１よりも
増幅度が低く設定されており、第５図に示す信号
Ｓ１よりも高レベル（つまり振幅の大きい）の信
号に対して適度なレベルになるように増幅するも
のである。したがつて、高入力増幅器２２に切換
えられたときは、入力信号Ｓ１が小さいときには
検知信号Ｓ７を出力しない。例えば主軸部３が回
転して工具４が前述のように絶縁状態となつてい
るときや、主軸部３が停止していても工具４とワ
ーク５とが金属粉や切削油などを介してのみ接触
し接触抵抗が高いときには、検知レベルが高いた
めに検知信号Ｓ７が出力されないのである。この
ように、スイツチ２３によつて低入力増幅器２１
と高入力増幅器２２とが切換えられることによつ
て、主軸部３が回転または停止のいずれの状態で
あつても確実な検知信号Ｓ７を得ることができる
のである。 The high input amplifier 22 is set to have a lower amplification degree than the low input amplifier 21, and is designed to have an appropriate level for a signal having a higher level (that is, a larger amplitude) than the signal S1 shown in FIG. It is something that amplifies. Therefore, when switched to the high input amplifier 22, the detection signal S7 is not output when the input signal S1 is small. For example, when the main spindle 3 rotates and the tool 4 is in an insulated state as described above, or even when the main spindle 3 is stopped, the tool 4 and the workpiece 5 may be connected only through metal powder, cutting oil, etc. When there is contact and the contact resistance is high, the detection level is high, so the detection signal S7 is not output. In this way, the switch 23 allows the low input amplifier 21
By switching between the main shaft section 3 and the high input amplifier 22, a reliable detection signal S7 can be obtained regardless of whether the main shaft section 3 is rotating or stopped.
上述の実施例によると、工具４とワーク５とが
接触していないときには加工機１に高周波電流Ｈ
は流れないため消費電力の増大を招かないととも
に、工具４とワーク５とが接触した場合には主軸
部３が高速回転しているときでも高周波電流Ｈが
流れ、これを検知コイル１０によつて無接触で検
知し、検出部２０によつて検知信号を良好なSN
比で安定して得ることができる。励起コイル７と
検知コイル１０とをケーシング１４内に収納して
一体化したので、取付けや交換が容易である。遮
へい板１３を設けたので、励起コイル７からの漏
れ磁界によつて検知コイル１０に出力が生じるの
を軽減することができる。センサー部６を第３図
Ｂに示すように、励起コイル７及び検知コイル１
０をそれぞれ別個のケーシング２７，２８に収納
し、検知コイル１０が励起コイル７の漏れ磁界の
影響を受けない程度に離して取付けるようにして
もよい。 According to the above embodiment, when the tool 4 and the workpiece 5 are not in contact with each other, the high frequency current H is applied to the processing machine 1.
does not flow, so no increase in power consumption is caused, and when the tool 4 and workpiece 5 come into contact, a high-frequency current H flows even when the main shaft portion 3 is rotating at high speed, and this is detected by the detection coil 10. Detection is performed without contact, and the detection signal is detected by the detection unit 20 with a good SN.
It can be obtained stably with the ratio. Since the excitation coil 7 and the detection coil 10 are housed in the casing 14 and integrated, installation and replacement are easy. Since the shielding plate 13 is provided, it is possible to reduce the output generated in the detection coil 10 due to the leakage magnetic field from the excitation coil 7. As shown in FIG. 3B, the sensor section 6 includes an excitation coil 7 and a detection coil 1.
0 may be housed in separate casings 27 and 28, respectively, and the detection coil 10 may be mounted apart from each other to the extent that it is not affected by the leakage magnetic field of the excitation coil 7.
上述の実施例においては、検出部２０を第４図
に示す構成としたが、これ以外に種々の構成が可
能である。例えば、低入力増幅器２１と高入力増
幅器２２との２個の増幅器を設けるのでなく、１
個の増幅器の増幅度のみを切換えたり、減衰器を
用いたりしてもよく、または増幅度は一定で波形
整形器２５のパルス信号を出力するしきい値を切
換えるようにしてもよい。また、積分器２６を同
期カウンターにより構成してもよく、適当なノイ
ズフイルターを挿入したり、または電源部１９の
信号と比較することによつて高周波電流Ｈによる
信号以外の信号を打ち消したり、検知信号の位相
の変化を検出して検知することも可能である。励
起コイル７又は検知コイル１０を２個用いて他方
を挟むサンドイツチ状にし、漏れ磁界の影響を軽
減するとともに検知感度を上げてさらにSN比を
良くすることも可能である。ケーシング１４にフ
ランジ部１４ｃを設けないで、合成樹脂や金属か
らなる別個の取付部材を用いて加工機１に取付け
てもよい。加工機１の主軸部３のベアリングの静
電容量が不足するか又は不安定であるならば、固
定部分と回転部分とに無接触で互に対向する円環
状の対向板を設けて一定の静電容量を別個に与え
るようにしても良い。加工機１は工作機械を含
み、主軸部３が固定されワーク５が移動するもの
をも含むもので、また励起コイル又は検知コイル
をフレーム２やワーク５側に取付けることは本考
案の設計的変形例と解釈すべきである。 In the above embodiment, the detection section 20 has the configuration shown in FIG. 4, but various other configurations are possible. For example, instead of providing two amplifiers, a low input amplifier 21 and a high input amplifier 22, one
Only the amplification degree of each amplifier may be changed, an attenuator may be used, or the amplification degree may be constant and the threshold value for outputting the pulse signal of the waveform shaper 25 may be changed. Further, the integrator 26 may be configured with a synchronous counter, and by inserting an appropriate noise filter or comparing it with the signal from the power supply section 19, signals other than those caused by the high frequency current H can be canceled or detected. It is also possible to detect by detecting changes in the phase of the signal. It is also possible to use two excitation coils 7 or two detection coils 10 and make them sandwich the other in a sandwich-like configuration to reduce the influence of leakage magnetic fields, increase detection sensitivity, and further improve the signal-to-noise ratio. The flange portion 14c may not be provided on the casing 14, and the casing 14 may be attached to the processing machine 1 using a separate attachment member made of synthetic resin or metal. If the capacitance of the bearing of the main shaft portion 3 of the processing machine 1 is insufficient or unstable, an annular opposing plate may be provided between the stationary part and the rotating part to face each other without contact to maintain a constant static. The capacitance may be provided separately. The processing machine 1 includes a machine tool, and also includes one in which the main shaft portion 3 is fixed and the workpiece 5 moves, and it is a design modification of the present invention to attach an excitation coil or a detection coil to the frame 2 or the workpiece 5 side. Should be interpreted as an example.
（効果）
本考案によると、加工機の手軸部が回転または
停止のいずれの状態であつても、工具とワークの
接触を安定して検知することができ、したがつて
ワークを切削する以前の芯出しや寸法測定、また
は工具の長さや径の寸法補正、工具の欠損検知な
どを容易に正確に行うことが可能となるのであ
る。(Effects) According to the present invention, contact between the tool and the workpiece can be stably detected even when the hand shaft of the processing machine is rotating or stopped. This makes it possible to easily and accurately perform centering and dimension measurements, correction of tool length and diameter, and detection of tool defects.
図面は本考案の実施例を示し、第１図は検知装
置を加工機に取付けた状態を示す正面図、第２図
は検知装置の一部ブロツク図を含む斜視図、第３
図Ａはセンサー部の断面図、第３図Ｂはセンサー
部の他の例を示す断面図、第４図は検出部の一例
を示すブロツク図、第５図は各部の信号波形の一
例を示す図である。
Ｈ……高周波電流（誘導電流）、Ｓ７……検知
信号、１……加工機、２……フレーム、３……主
軸部、４……工具、５……ワーク、６……センサ
ー部、７……励起コイル、８，１１……コア、
９，１２……コイル、１０……検知コイル、２０
……検出部、２１……低入力増幅器、２２……高
入力増幅器、２３……切替えスイツチ。
The drawings show an embodiment of the present invention; FIG. 1 is a front view showing the detection device installed on a processing machine, FIG. 2 is a perspective view including a partial block diagram of the detection device, and FIG.
Figure A is a cross-sectional view of the sensor part, Figure 3B is a cross-sectional view showing another example of the sensor part, Figure 4 is a block diagram showing an example of the detection part, and Figure 5 is an example of signal waveforms of each part. It is a diagram. H... High frequency current (induced current), S7... Detection signal, 1... Processing machine, 2... Frame, 3... Spindle section, 4... Tool, 5... Workpiece, 6... Sensor section, 7 ...excitation coil, 8,11...core,
9, 12...Coil, 10...Detection coil, 20
. . . detection section, 21 . . . low input amplifier, 22 . . . high input amplifier, 23 . . . changeover switch.
Claims (1)
加工機の工具とワークの接触を電磁的に検知する
検知コイルと、該検知コイルの出力信号から工具
とワークの接触を意味する検知信号を得るための
検知部とよりなり、該検出部は、加工機の主軸部
が回転状態または停止状態のいずれかの状態に応
じて、検知信号を得るための検知レベルを低レベ
ルまたは高レベルのいずれかに外部信号により切
替える切替えスイツチを有してなることを特徴と
する工具とワークの接触検知装置。 A detection coil is attached to a processing machine having a rotating main shaft portion and electromagnetically detects contact between a tool of the processing machine and a workpiece, and a detection signal indicating contact between the tool and the workpiece is obtained from an output signal of the detection coil. The detection unit sets the detection level for obtaining a detection signal to either a low level or a high level depending on whether the main shaft of the processing machine is rotating or stopped. A contact detection device for a tool and a workpiece, characterized by having a changeover switch that is changed over by an external signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985068636U JPH035405Y2 (en) | 1985-05-09 | 1985-05-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985068636U JPH035405Y2 (en) | 1985-05-09 | 1985-05-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61184651U JPS61184651U (en) | 1986-11-18 |
| JPH035405Y2 true JPH035405Y2 (en) | 1991-02-12 |
Family
ID=30603563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985068636U Expired JPH035405Y2 (en) | 1985-05-09 | 1985-05-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH035405Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2536223B2 (en) * | 1990-03-28 | 1996-09-18 | 三菱電機株式会社 | Contact detection device |
-
1985
- 1985-05-09 JP JP1985068636U patent/JPH035405Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61184651U (en) | 1986-11-18 |
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