• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A probe stylus (32) is mounted on the nose (28) of a toolholder (14) which fits into the spindle (10) of a numerically controlled machine tool. An oscillator is mounted within the toolholder (14) and is powered by a battery (20) within the toolholder (14). The output of the oscillator is coupled to a primary coil (40) on the toolholder (14) which is inductively coupled to a ringshaped secondary coil (84) on the spindlehead (12) of the machine tool. Switches within the toolholder (14) are wired to the oscillator to cause it to shift frequency when the probe stylus (32) makes contact with a workpiece when moving along any one of the X, Y or Z axes. The ring-shaped secondary coil (84) is coupled to the machine tool's NC circuits to indicate when the probe stylus (32) makes contact with the workpiece.
    公开号:SU784745A3
    申请号:SU782688148
    申请日:1978-11-20
    公开日:1980-11-30
    发明作者:Е Стоббе Ричард；Джонстоун Ричард
    申请人:Кирни Энд Трекер Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to mechanical engineering, in particular to machine tools for the use of probes in machine tools with program control.
    Known probes used in power 5 electromechanical servo systems of copy-milling machines and containing mechanical and electrical parts fl].
    The disadvantage of these probes is their low noise immunity due to the fact that the mechanical and electrical parts are located in the real nodes of the machine and this affects how the signal is transmitted to others. 15 of the device, and when receiving the receiving signal of the probe.
    The aim of the invention is to increase the noise immunity.
    This goal is achieved by the fact that the control signal generating circuit is installed in the tool holder, and the control signal block diagram is made in the form of two coils, one of which is primary, by installing 25 on the tool holder bracket, and the secondary is made in the form of a ring, and installed coaxially with the spindle.
    The generator is made in the form of three inverting amplifiers connected 30 in a ring circuit by means of resistors and capacitors.
    In FIG. 1 shows a probe longitudinal section; in FIG. 2 - electric circuit of the probe.
    The tool holder 1 is clamped in its headstock 2 with its inner end (fastening means not shown). The tool holder 1 has a housing 3 with a central cavity 4 in which the battery 5 is located. The inner end 6 of the tool holder 1 is attached to the housing 3 by means of bolts 7 and has a spring 8 that abuts against the negative terminal of the battery 5 and is a ground for it. An electrical terminal 9 is pressed to the positive terminal of the battery 5.
    To the outer end of the housing 3 by fixing screws 10, one of which is shown in FIG. 1, the tip 11 is attached. To the tip 11 is attached the probe element 12 protruding from it. Associated with the probe element 12 is a switch unit (not shown) located in the tip 11, which closes the switch contacts when the probe element 12 is easily biased along the X, y, or E axes of the machine. This part of the construction is traditional and is not described in detail here. Electrical wires (not shown) from the switch block are connected through an electric plug 13 and a socket 14 to a circuit 15 on a printed circuit board containing a generator circuit, a signal: from the output of which is supplied to the primary winding 16 through the wires 17. Primary winding 16 mounted on ···: bracket 18, which protrudes away from the tip 11 and also includes a switch 19 having a plunger 20, which is triggered by contact with the tip 21 of the spindle 22 when the tool holder 1 is clamped in the spindle. Switch 19 connects the battery 5 to the printed circuit 15 when the tool holder 1 is inserted into the spindle 22, and disconnects the battery 5 when the tool holder 1 is removed from the spindle 22. To this end, the switch spring 19 is compressed in the normally open position and: it opens immediately, as the switch plunger 20 loses contact with the spindle tip 21.
    The generator power source includes a battery 5 connected to the wire 23 of the power source through the normally open contacts of the switch 19, and a diode 24, which protects the circuit from reverse voltage in case the battery 5 is inserted with reverse polarity. Between the wire 23 and the ground, there is a filter capacitor 25 for filtering out noise and vibrations coming from the power source. (Details of the connection between the wire 23, the power source and the active elements are not shown). ι
    X’ generator is built on three inverters. oscillating amplifiers 26, 27, 28 connected by a ring through resistors 29, 30 and 31 and a capacitor 32. The generation frequency is determined by the propagation delay along the ring, which is partially determined by the RC time constant in the feedback circuit. The RC time constant is changed using switches 33, 34 and 35, which are opened by the probe element 12 when it slightly touches the workpiece when moving along the machine axes X, Y, and I. Switch 33 corresponds to $ o X X, switch 34 corresponds to the Y axis, and switch 35 corresponds to the оси axis. When any of the switches 33, 34 or 35 opens, the resistor 30 is disconnected from the circuit, as a result of which the time constant of the RC feedback circuit changes, and hence the frequency of the generator. Therefore, the change in the frequency of the generator is an indication that the probe element 12 has come into contact with the workpiece.
    The signal from the output of the generator circuit is amplified by a push-pull type amplifier circuit built on three inverting amplifiers 36, 37, 38 connected in series with the primary high-frequency winding 16 and the load resistor 39, as shown in FIG. 2, with an amplifier 36 on one side of the winding 16 and amplifiers 37 and 38 on the other side of this winding.
    The output signal of the primary winding 16 is transmitted by magnetic induction to the secondary winding 40, made in the form of a ring and mounted on the headstock 2 (see Fig. 1) coaxial with the axis of the spindle 22 near the primary winding 16. Since the secondary winding 40 is coaxial with the axis of the spindle 22, the primary winding 16 will be near the secondary winding 40, regardless of the angular position of the tool holder
    3. The windings 16 and 40 are located as close as possible to one another to ensure a relatively large coupling coefficient. The primary winding 16 is preferably shielded by an electrically conductive material on surfaces not located close to the secondary winding 40 in order to minimize electromagnetic radiation. The connection between the windings of the transformer 16 and 40 is carried out using magnetic induction, which does not require electromagnetic radiation.
    The secondary winding 40 is connected to the traditional detector circuit 41 (see Fig. 2), which, in turn, is connected to the numerical control circuits (not shown) of the machine. The relatively high coupling coefficient between the transformer windings 16 and 40 allows raising the sensitivity threshold of the circuit the detector 41 is high enough to eliminate the possibility of malfunction due to accidental radiation from other transmitters.
    权利要求:
    Claims (2)
    [1]
    (54) SPINDLE TESTING The invention relates to mechanical engineering, in particular, to a machine tool industry for using probes in software-controlled machine tools. Probes are known that are used in power electromechanical tracking systems of copying and milling machines and containing mechanical and electrical parts | 1. The disadvantage of these probes is their low noise immunity due to the fact that the mechanical electrical parts are located in different nodes of the machine and this affects both the signal transmission on the surrounding devices and the reception of the stylus receiving signal. The aim of the invention is to improve the noise immunity. The goal is achieved by the fact that the control signal forming circuit is installed in the tool holder and the control signal block diagram is made in the form of two coils, one of which is primary, mounted on the tool holder bracket, and secondary is made in the form of a ring and installed coaxially with the spindle. The generator is made in the form of three and. vertiruzdich amplifiers connected in a ring circuit with resistors and capacitors. FIG. 1 shows a longitudinal dipstick in FIG. 2 - electric circuit of the probe. The tool holder 1 with its internal end is clamped in the chuck of the headstock 2 (the fastening means are not shown). The toolholder 1 has a housing 3 with a center cavity 4 in which the battery 5 is located. The inner end 6 of the toolholder 1 is attached to the housing 3 with bolts 7 and has a spring 8 that abuts against the negative terminal of the battery 5 and is grounded for it. To the positive terminal of the battery 5 is pressed electrical contact 9. To the outer end of the housing 3 with mounting screws 10, one of which is shown in FIG. 1, the tip 11 is attached. A probe 12 protruding from it is attached to the tip 11. A probe unit 12 (not shown), located in the tip 11, is connected to the probe element 12, which closes the switch contacts when the probe element 12 is easily displaced along the X, Y or I axis of the machine. This part. the construction is traditional and is not described in detail here. Electrical wires (not shown) from the switch unit are connected via an electrical plug. 1b a plug 13 and a plug socket 14 with a circuit 15 on a printed circuit board containing a generator circuit, a signal from which output enters the primary winding 16 by wire 17. Primary winding 16 is installed on: bracket 18, which protrudes away from tip 11 and also contains a switch 19, having a plunger 20, which is activated when it contacts with The jaw 21 of the spindle 22 when the tool holder 1 is held in the spindle. A switch 19 connects the battery 5 to the printed circuit 15 when the tool holder 1 is inserted into the spindle 22, and disconnects the battery 5 when the tool holder 1 is removed from the spindle 22. For this purpose the spring of the switch 19 is compressed at the normally open position and opens immediately as the plunger 20 of the switch loses contact with the foot: 21 spindles. The generator power supply includes a battery 5 connected to the power source wire 23 via normally open contacts of the switch 19, and a diode 24 protecting the circuit from reverse voltage in case the battery 5 is inserted with the opposite polarity. Between the wire 23 and the ground is a filter capacitor 25 for filtering out noise and vibrations coming from the power source. (Details of the connection by wire 23, power source and active elements are not shown). The generator is built on three inverting amplifiers 26, 27, 28, connected by a ring through resistors 29 30 and 31 and a capacitor 32. The generation frequency is determined by the delay in propagation around the ring, which is partially determined by the constant RC time in the feedback circuit. zi The RC time constant is changed by the switches 33, 34 and 35, which are opened by the probe element 12 when it slightly touches the workpiece when moving along the X, Y, and Z axes. Switch 33 corresponds to REC X, switch 34 corresponds to axis Y, and switch 35 cooTBe: jcTByeT to axis Z. When any of switches 33, 34 or 35 is opened, resistor 30 is disconnected from the circuit, thereby changing the RC time constant Feedback and, therefore, the generator frequency. Consequently, a change in the generator frequency is an indication that probe element 12 has been in contact with the workpiece. The output signal from the generator circuit is amplified by a push-pull amplifier circuit, built on three inverting amplifiers 36, 37, 38 connected in series with the primary high frequency winding 16 and lagruzok resistor 39, as shown in FIG. 2, with an amplifier 36 on one side of the winding 16 and amplifiers 37 and 38 on the other side of this winding. The output signal of the primary winding 16 is transmitted by magnetic induction to the secondary winding 40, made in the form of a ring and mounted on the spindle head 2 (see FIG. 1) coaxially with the spindle axis 22 near the primary winding 16. Since the secondary winding 40 is coaxial with the spindle axis 22 the primary winding 16 will be close to the secondary winding 40, regardless of the angular position of the toolholder 3. The windings 16 and 40 are located as close as possible to each other to provide a relatively large coupling coefficient. The primary winding 16 is preferably shielded with an electrically conductive material on surfaces that are not located near the secondary winding 40 in order to minimize electromagnetic radiation. The connection between the windings of the transformer 16 and 40 is made by magnetic induction, which does not require electromagnetic radiation. The secondary winding 40 is associated with a conventional detector circuit 41 (see Fig. 2), which in turn is associated with numerical control circuits (not shown) of the machine,. The relatively high coupling ratio between the windings 16 and 40 of the transformer allows the sensitivity threshold of the detector circuit 41 to be raised high enough to eliminate the possibility of incorrect operation due to accidental radiation from other transmitters. Claim 1. Spindle probe for a machine comprising a spindle head with a spindle for fastening the toolholder with a probe, and a control signal generating circuit comprising a generator, power supply and control units with a control signal removal unit, characterized in that increase the noise immunity, the control signal forming circuit is installed in the tool holder, and the control signal block diagram is made in the form of two coils, one of them. which are primary mounted on the tool holder bracket, and secondary made in the form of a ring and installed coaxially with the spindle.
    [2]
    2. Probe according to claim. 1, characterized in that the generator is made in the form of three inverting amplifiers.
    connected in a ring circuit with resistors and capacitors.
    Sources of information taken into account in the examination
    1, A. A. Vavilov, et al. Powertrain electromechanical tracking systems of copying and milling machines. Mechanical Engineering, 1964, p. 43-47.
    类似技术:
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    同族专利:
    公开号 | 公开日
    IT7869649D0|1978-11-20|
    BR7807577A|1979-06-26|
    PL211082A1|1979-06-18|
    NO783808L|1979-05-22|
    US4145816A|1979-03-27|
    EP0002023B1|1982-06-02|
    IT1108695B|1985-12-09|
    CS207726B2|1981-08-31|
    IL55896D0|1979-01-31|
    PL121674B1|1982-05-31|
    KR820000477B1|1982-04-07|
    DE2861883D1|1982-07-22|
    IL55896A|1981-12-31|
    EP0002023A1|1979-05-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2457127A|1945-06-27|1948-12-28|Standard Telephones Cables Ltd|Antenna system|
    US2867783A|1948-11-06|1959-01-06|Edward G Martin|Measuring device|
    US3164909A|1959-01-14|1965-01-12|Gen Electric|Automatic gauging system|
    US3149421A|1961-01-24|1964-09-22|Watton Engineering Co Ltd|Measuring and gauging devices|
    US3191294A|1965-02-03|1965-06-29|Daugherty Jesse|In-process inspection apparatus|
    US3750295A|1971-07-22|1973-08-07|Werkzeugmasch Veb|Measuring machine|
    DE2341251A1|1973-08-16|1975-02-27|Hueller Gmbh K|Travelled distance difference meter - has a test sensor movable over the distance to be measured|
    DE2419081C3|1974-04-20|1979-02-15|Bien, Reinhold, 6701 Ruppertsberg|Device for contactless transmission of measured values|
    SE7602072L|1976-02-23|1977-08-28|Saab Scania Ab|PATCH SET TO CONTROL FEED A WORK MADE IN A TOOL MACHINE|US4339714A|1978-07-07|1982-07-13|Rolls Royce Limited|Probe having passive means transmitting an output signal by reactive coupling|
    JPS637657B2|1981-03-18|1988-02-17|Mitsubishi Electric Corp|
    US4670989A|1981-04-30|1987-06-09|Gte Valeron Corporation|Touch probe using microwave transmission|
    US4401945A|1981-04-30|1983-08-30|The Valeron Corporation|Apparatus for detecting the position of a probe relative to a workpiece|
    US4510693A|1982-06-14|1985-04-16|Gte Valeron Corporation|Probe with stylus adjustment|
    US4509266A|1982-06-14|1985-04-09|Gte Valeron Corporation|Touch probe|
    US4599524A|1982-10-11|1986-07-08|Renishaw Plc|Position-sensing apparatus|
    EP0126195B1|1982-10-15|1987-07-15|Renishaw plc|Position-sensing apparatus|
    AU555481B2|1983-06-14|1986-09-25|Gte Valeron Corp.|Remote measuring apparatus|
    US4608763A|1983-06-14|1986-09-02|Gte Valeron Corporation|Probe|
    GB8319812D0|1983-07-22|1983-08-24|Collingwood D|Position sensing apparatus|
    US4523063A|1983-12-05|1985-06-11|Gte Valeron Corporation|Touch probe having nonconductive contact carriers|
    GB8503355D0|1985-02-09|1985-03-13|Renishaw Plc|Sensing surface of object|
    US4693110A|1985-06-06|1987-09-15|Gte Valeron Corporation|Method and apparatus for testing the operability of a probe|
    US4658509A|1985-09-12|1987-04-21|Gte Valeron Corporation|Probe having low battery detection/transmission feature|
    FR2603218B1|1986-09-01|1994-03-11|Meseltron Sa|WIRELESS DEVICE FOR CONTROLLING THE FEED SPEED OF A TOOL TO A WORKPIECE.|
    DE3813949C2|1988-04-26|1992-06-11|Dr. Johannes Heidenhain Gmbh, 8225 Traunreut, De|
    FR2674659A1|1991-03-29|1992-10-02|Renishan Metrology Ltd|SIGNAL TRANSMISSION DEVICE FOR TRIGGERED PROBE.|
    DE4417057C5|1994-05-14|2004-07-29|Wolfgang Madlener|probe|
    DE60237556D1|2001-02-02|2010-10-14|Renishaw Plc|Method for operating a machine tool probe|
    US6627691B2|2001-06-28|2003-09-30|Lord Corporation|Aqueous resin adhesive composition having pre-bake resistance|
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    DE102009035513B4|2009-07-31|2012-03-08|Günther Taube|Method for drilling suction openings in vacuum thermoforming tools and drilling device therefor|
    JP6887048B1|2020-07-07|2021-06-16|Dmg森精機株式会社|Machine tools, machine tool control methods, and machine tool control programs|
    GB202103105D0|2021-03-05|2021-04-21|Renishaw Plc|Measurement probe|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/853,764|US4145816A|1977-11-21|1977-11-21|Spindle probe with orbital transformer|
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