WO2011036790A1 - ねじ状砥石の位相合わせ方法及びその装置 - Google Patents
ねじ状砥石の位相合わせ方法及びその装置 Download PDFInfo
- Publication number
- WO2011036790A1 WO2011036790A1 PCT/JP2009/066761 JP2009066761W WO2011036790A1 WO 2011036790 A1 WO2011036790 A1 WO 2011036790A1 JP 2009066761 W JP2009066761 W JP 2009066761W WO 2011036790 A1 WO2011036790 A1 WO 2011036790A1
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- WIPO (PCT)
- Prior art keywords
- grindstone
- dresser
- threaded
- phase
- thread
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
- B23F23/12—Other devices, e.g. tool holders; Checking devices for controlling workpieces in machines for manufacturing gear teeth
- B23F23/1225—Arrangements of abrasive wheel dressing devices on gear-cutting machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
- B23F23/006—Equipment for synchronising movement of cutting tool and workpiece, the cutting tool and workpiece not being mechanically coupled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F5/00—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made
- B23F5/02—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by grinding
- B23F5/04—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by grinding the tool being a grinding worm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/10—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving electrical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
- B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
- B24B53/075—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels for workpieces having a grooved profile, e.g. gears, splined shafts, threads, worms
Definitions
- the present invention relates to a method and an apparatus for phase adjustment of a threaded grindstone for performing phase alignment of a threaded grindstone with respect to a dresser prior to meshing between the threaded grindstone and a dresser during dressing.
- a gear grinder has been provided as one that grinds a workpiece, which is a gear to be processed after heat treatment, using a grindstone, which is a grinding tool, and efficiently finishes the tooth surface of the workpiece.
- a gear grinding machine the grindstone and the workpiece are meshed with each other and the workpiece is ground by rotating them synchronously. If the meshing accuracy becomes insufficient, uneven grinding may occur on the tooth surface of the workpiece. In addition, an excessive load is applied to the grindstone, which may shorten the life of the grindstone.
- the grinding wheel is slid on the workpiece in the axial direction, and the moment when the grinding wheel crosses the thread groove of the workpiece and the moment when the grinding wheel becomes non-contact are detected by the AE sensor.
- the phase of the grindstone and the workpiece is adjusted by moving the workpiece in the axial direction so that the grindstone faces the middle position of the thread groove obtained based on the detection result.
- the detection of contact and non-contact of the grindstone with respect to the workpiece is instantaneous, it is difficult to detect with high accuracy.
- the gear grinding machine grinds the workpiece using a grindstone dressed with a dresser, so that not only the phase alignment between the grindstone and the workpiece during grinding but also the phase alignment between the grindstone and the dresser during dressing is the same. It is thought that this problem will occur.
- the present invention solves the above-mentioned problem, and detects the contact and non-contact of the threaded grinding wheel with high accuracy, and can perform the phase alignment of the threaded grinding wheel with precision. And an apparatus for the same.
- the phase matching method for a threaded grindstone according to the first invention for solving the above-mentioned problems is as follows. Prior to meshing of the thread-like grindstone and the dresser at the time of dressing, the thread-like grindstone phasing method for phasing the thread-like grindstone with respect to the dresser, Rotate the threaded grindstone in one direction, Detecting an elastic wave generated when one blade surface of the threaded grindstone contacts one blade surface of the dresser; Even if the screw-shaped grindstone contacts the dresser, if the one-directional measurement value corresponding to the elastic wave does not exceed a predetermined value, the rotational speed of the dresser until the one-directional measurement value exceeds the predetermined value.
- the screw-shaped grindstone is positioned in a meshable phase.
- a phase adjusting device for a threaded grindstone according to a second invention for solving the above-mentioned problems A threaded grindstone phasing device for phasing the threaded grindstone with respect to the dresser prior to meshing between the threaded grindstone and the dresser during dressing, Detecting means for detecting an elastic wave generated when the threaded grindstone rotates and contacts the dresser; A determination unit that determines that the threaded grindstone has contacted the dresser when a measurement value corresponding to the elastic wave detected by the detection unit exceeds a predetermined value; Dresser rotation speed setting means for setting the rotation speed of the dresser so that the measured value exceeds the predetermined value when the threaded grindstone contacts the dresser and the measured value does not exceed the predetermined value.
- Grinding wheel phase control means for positioning the threaded grindstone to a phase that can be engaged based on the phase of the threaded grindstone when the determination means determines contact.
- a phase adjusting device for a threaded grindstone according to a third invention for solving the above-mentioned problems is as follows.
- the dresser rotational speed setting means increases the rotational speed of the dresser stepwise.
- phase alignment method and apparatus for a threaded grindstone determines whether or not the threaded grindstone is in contact with the dresser based on the measured value according to the elastic wave of the threaded grindstone when contacting the dresser. If the measured value does not exceed the specified value even when the threaded wheel contacts the dresser, the contactor and non-contact of the threaded wheel can be detected with high accuracy by increasing the rotation speed of the dresser. And the phase alignment of the thread-shaped grindstone with respect to the dresser can be precisely performed.
- FIG. 1 It is a schematic block diagram of the phase alignment apparatus of the thread-shaped grindstone which concerns on one Example of this invention, Comprising: It is the figure which showed a mode when dressing a thread-shaped grindstone with a disk dresser. It is the figure which showed the mode when grinding a workpiece
- the gear grinding machine 1 to which the phase adjusting device for a threaded grinding wheel according to the present invention is applied grinds a workpiece (workpiece gear) W of an internal gear material with a barrel-shaped threaded grinding wheel 14. Further, as shown in FIG. 1, it has a dressing function for dressing the threaded grindstone 14 with a disk dresser 32.
- a grinding wheel head 11 is supported on the gear grinding machine 1 so as to be movable and turnable.
- a spindle 12 is rotatably supported by the grindstone head 11, and a grindstone arbor 13 is formed at the tip of the spindle 12.
- a threaded grindstone 14 is detachably attached to the tip of the grindstone arbor 13. That is, by driving the grindstone head 11, the threaded grindstone 14 is rotationally driven via the grindstone arbor 13 of the spindle 12.
- a rotary table 21 is rotatably supported on the front surface of the grindstone head 11, and a work W is detachably attached to the upper surface of the rotary table 21 via a mounting jig (not shown). That is, by driving the rotary table 21, the workpiece W is rotationally driven.
- a dresser drive unit 31 is movably supported on the side of the rotary table 21, and a disk dresser 32 is detachably attached to the dresser drive unit 31. That is, by driving the dresser driving unit 31, the disk dresser 32 is rotationally driven.
- An acoustic emission type AE (Acoustic Emission) fluid sensor (detection means) 42 is supported on the front end surface of the grindstone head 11 via a bracket 41.
- the AE fluid sensor 42 detects an elastic wave caused by vibration or friction generated in the material through the injected fluid, and processes this as an AE signal. It has an injection hole 42a for injecting it to a predetermined measurement position of the arbor 13, and a detector 42b for detecting an elastic wave propagated from the measurement position via the coolant C. Further, a coolant tank 43 is connected to the injection hole 42a of the AE fluid sensor 42, and an AE sensor amplifier 44 is connected to the detection portion 42b.
- the coolant C supplied from the coolant tank 43 to the AE fluid sensor 42 is, for example, cutting oil, and the coolant pressure and the injection flow rate can be adjusted according to the distance between the AE fluid sensor 42 and the measurement position. It has become.
- the coolant C supplied from the coolant tank 43 is sprayed from the spray hole 42a to the measurement position of the grindstone arbor 13, so that the generated elastic wave of the threaded grindstone 14 is passed through the coolant C.
- the detected elastic wave is input to the AE sensor amplifier 44 as an AE signal.
- the AE sensor amplifier 44 converts the inputted AE signal into a voltage (measured value) V and displays it as needed.
- the gear grinding machine 1 is provided with an NC device (determination means, dresser rotation speed setting means, grindstone phase control means) 50.
- the NC device 50 is connected to, for example, the grindstone head 11, the rotary table 21, the dresser driving unit 31, the AE sensor amplifier 44, and the like, and based on the input workpiece specifications and processing conditions, the threaded grindstone 14 is used.
- the grinding of the workpiece W and the dressing of the threaded grinding wheel 14 by the disk dresser 32 are controlled, and the magnitude of the elastic wave detected by the AE fluid sensor 44 prior to the meshing (toothing) at the time of grinding or dressing. Based on this, the contact and non-contact between the threaded grinding wheel 14 and the workpiece W or the disk dresser 32 are determined, and the phase of the threaded grinding wheel 14 is adjusted.
- the threaded grindstone 14 is moved into the workpiece W attached to the rotary table 21.
- the phase alignment is roughly performed so that the cutting edge of the threaded grindstone 14 and the tooth tip of the workpiece W do not interfere with each other. (Coarse phase alignment).
- the coolant C is injected toward the measurement position of the grindstone arbor 13 from the injection hole 42a of the AE fluid sensor 42, and the detection is carried out.
- the detection of the elastic wave of the threaded grindstone 14 is started by the part 42b.
- the AE sensor amplifier 44 converts the inputted AE signal into a voltage V as shown in FIG. Change will be displayed.
- the voltage V is measured as the maximum voltage Vf when the threaded grindstone 14 is not in contact, and a threshold value Vo greater than this voltage Vf is automatically set. It is set up. This threshold value Vo is used when determining the contact of the threaded grindstone 14 described later.
- the phase alignment is performed by positioning the threaded grindstone 14 at the intermediate phase. Is performed precisely (precise phase alignment).
- the tooth surface of the workpiece W is ground by the blade surface of the threaded grinding wheel 14 by meshing the threaded grinding wheel 14 with the workpiece W and rotating them synchronously in such a precise phase alignment state. .
- phase alignments are roughly performed (coarse phase alignment) so that the cutting edge of the grindstone 14 and the cutting edge of the disk dresser 32 do not interfere with each other.
- the disk dresser 32 is rotated while the rotation of the threaded grindstone 14 is stopped, and the coolant C is directed from the injection hole 42a of the AE fluid sensor 42 toward the measurement position of the grindstone arbor 13.
- the detection of the elastic wave of the threaded grindstone 14 is started by the detecting portion 42b.
- the rotation speed N of the disk dresser 32 at this time is the minimum rotation speed at which an operator can confirm the contact sound when the screw-shaped grindstone 14 comes into contact with the screw-shaped grindstone 14 when the screw-shaped grindstone 14 comes into contact. It is set to an intermediate value between the maximum rotational speed at which the shaped grindstone 14 and the disk dresser 32 are not damaged.
- the AE sensor amplifier 44 converts the inputted AE signal into a voltage V as shown in FIG. Change will be displayed.
- the voltage V is measured as the maximum voltage Vf when the threaded grindstone 14 is not in contact, and a threshold value (predetermined value) larger than the voltage Vf is measured. ) Vo is set automatically. This threshold value Vo is used when determining the contact of the threaded grindstone 14 described later.
- the threaded grindstone 14 is rotated forward so that one blade surface thereof is brought into contact with one blade surface of the disk dresser 32.
- the elastic wave of the threaded grindstone 14 generated by the contact is transmitted to the grindstone arbor 13, and the elastic wave transmitted to the grindstone arbor 13 is detected by the AE fluid sensor 42 via the coolant C. .
- the waveform of the voltage V changes according to the input AE signal, and this voltage (one-way side measured value) V is set in advance.
- the NC device 50 determines that the threaded grindstone 14 has contacted the disk dresser 32, and the phase (one-side phase) of the threaded grindstone 14 at this time is stored.
- the threaded grinding wheel 14 is reversed and the other blade surface is brought into contact with the other blade surface of the disk dresser 32.
- the elastic wave of the threaded grindstone 14 generated by the contact is transmitted to the grindstone arbor 13, and the elastic wave transmitted to the grindstone arbor 13 is detected by the AE fluid sensor 42 via the coolant C. .
- the waveform of the voltage V changes according to the input AE signal, and this voltage (measurement value in the other direction) V is set in advance.
- the NC device 50 determines that the threaded grindstone 14 has come into contact with the disk dresser 32, and the phase of the threaded grindstone 14 at this time (phase in the other direction) is stored.
- the phase alignment is performed by positioning the threaded grindstone 14 at the intermediate phase. Is performed precisely (precise phase alignment).
- the threaded grindstone 14 is engaged with the disk dresser 32 and the disk dresser 32 is rotated, whereby the blade surface of the threaded grindstone 14 is dressed by the blade surface of the disk dresser 32. It will be.
- the work W made of the internal gear material is adopted, but a work made of the external gear material may be adopted.
- work W or the disk dresser 32 was made into the common threshold value Vo, the threshold value of a different value may be used respectively, and these threshold values are each material. It is also possible to set according to the processing conditions.
- the NC device 50 controls the rotational speed N of the disk dresser 32 to increase. That is, as shown by the dotted line in FIG. 4, when the measured voltage V exceeds the maximum voltage Vf at the time of non-contact and is equal to or less than the threshold value Vo, the disk is kept until the voltage V exceeds the threshold value Vo.
- the rotational speed N of the dresser 32 is increased stepwise at a constant rate (see FIG. 5), and the elastic wave of the threaded grindstone 14 is forcibly increased. Thereby, the detection sensitivity of the AE fluid sensor 42 is improved, and the contact determination of the threaded grindstone 14 is reliably performed.
- the increase rate may be constant, but the increase rate may be changed. As shown by the dotted line in the figure, the increase rate may be gradually reduced.
- step S1 the maximum voltage Vf when the threaded grindstone 14 is not in contact is measured, and then in step S2, the threshold Vo for determining that the threaded grindstone 14 is in contact is the maximum measured in step S1. A value larger than the voltage Vf is set.
- step S3 the minimum rotational speed at which the operator can confirm the contact sound when the threaded grindstone 14 comes into contact with the screw-shaped grindstone 14 when the threaded grindstone 14 comes into contact with the screw.
- An intermediate value between the maximum rotational speed and the rotational speed N of the disk dresser 32 is set, and then, in step S4, phase matching of the threaded grindstone 14 with respect to the disk dresser 32 is started.
- step S5 it is determined whether or not the threaded grinding wheel 14 has come into contact with the disk dresser 32. If yes, the phase alignment of the threaded grindstone 14 is continued in step S6, and the phase alignment ends in step S7. If NO, the rotational speed N of the disk dresser 32 is increased in step S8, and then the process returns to step S5.
- the phase of the threaded grinding wheel 14 with respect to the disk dresser 32 is adjusted prior to the engagement of the threaded grinding wheel 14 and the disk dresser 32 during dressing. At this time, based on the voltage V corresponding to the elastic wave of the threaded grinding wheel 14 when it contacts the disk dresser 32, it is determined whether or not the threaded grinding wheel 14 has contacted the disk dresser 32.
- the rotational speed of the disk dresser 32 is increased to forcibly determine contact, and based on the phase of the threaded grindstone 14 at this time, the screw The shaped grindstone 14 is positioned in an intermediate phase that can be meshed. Thereby, the contact and non-contact of the screw-shaped grindstone can be detected with high accuracy, and the phase alignment of the screw-shaped grindstone 14 with respect to the disk dresser 32 can be accurately performed.
- the present invention can be applied to a gear grinding machine that shortens the non-processing time.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Gear Processing (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
Description
ドレッシング時におけるねじ状砥石とドレッサとの噛み合いに先立って、前記ドレッサに対する前記ねじ状砥石の位相合わせを行うねじ状砥石の位相合わせ方法であって、
前記ねじ状砥石を一方向に回転させ、
前記ねじ状砥石の一方の刃面が前記ドレッサの一方の刃面に接触したときに発生する弾性波を検出し、
前記ねじ状砥石が前記ドレッサに接触しても、その弾性波に応じた一方向側測定値が所定値を超えないときには、前記一方向側測定値が前記所定値を超えるまで前記ドレッサの回転数を上げ、
前記一方向側測定値が前記所定値を超えたときの前記ねじ状砥石の一方向側位相を記憶し、
前記ねじ状砥石を他方向に回転させ、
前記ねじ状砥石の他方の刃面が前記ドレッサの他方の刃面に接触したときに発生する弾性波を検出し、
前記ねじ状砥石が前記ドレッサに接触しても、その弾性波に応じた他方向側測定値が前記所定値を超えないときには、前記他方向側測定値が前記所定値を超えるまで前記ドレッサの回転数を上げ、
前記他方向側測定値が前記所定値を超えたときの前記ねじ状砥石の他方向側位相を記憶し、
前記ねじ状砥石の前記一方向側位相及び前記他方向側位相に基づいて、前記ねじ状砥石を噛み合い可能な位相に位置決めする
ことを特徴とする。
ドレッシング時におけるねじ状砥石とドレッサとの噛み合いに先立って、前記ドレッサに対する前記ねじ状砥石の位相合わせを行うねじ状砥石の位相合わせ装置であって、
前記ねじ状砥石が回転して前記ドレッサに接触したときに発生する弾性波を検出する検出手段と、
前記検出手段が検出した弾性波に応じた測定値が所定値を超えたときに、前記ねじ状砥石が前記ドレッサに接触したと判定する判定手段と、
前記ねじ状砥石が前記ドレッサに接触し、且つ、前記測定値が前記所定値を超えないときに、前記測定値が前記所定値を超えるように前記ドレッサの回転数を設定するドレッサ回転数設定手段と、
前記判定手段が接触判定したときの前記ねじ状砥石の位相に基づいて、前記ねじ状砥石を噛み合い可能な位相に位置決めする砥石位相制御手段とを備える
ことを特徴とする。
前記ドレッサ回転数設定手段は、前記ドレッサの回転数を段階的に上げる
ことを特徴とする。
Claims (3)
- ドレッシング時におけるねじ状砥石とドレッサとの噛み合いに先立って、前記ドレッサに対する前記ねじ状砥石の位相合わせを行うねじ状砥石の位相合わせ方法であって、
前記ねじ状砥石を一方向に回転させ、
前記ねじ状砥石の一方の刃面が前記ドレッサの一方の刃面に接触したときに発生する弾性波を検出し、
前記ねじ状砥石が前記ドレッサに接触しても、その弾性波に応じた一方向側測定値が所定値を超えないときには、前記一方向側測定値が前記所定値を超えるまで前記ドレッサの回転数を上げ、
前記一方向側測定値が前記所定値を超えたときの前記ねじ状砥石の一方向側位相を記憶し、
前記ねじ状砥石を他方向に回転させ、
前記ねじ状砥石の他方の刃面が前記ドレッサの他方の刃面に接触したときに発生する弾性波を検出し、
前記ねじ状砥石が前記ドレッサに接触しても、その弾性波に応じた他方向側測定値が前記所定値を超えないときには、前記他方向側測定値が前記所定値を超えるまで前記ドレッサの回転数を上げ、
前記他方向側測定値が前記所定値を超えたときの前記ねじ状砥石の他方向側位相を記憶し、
前記ねじ状砥石の前記一方向側位相及び前記他方向側位相に基づいて、前記ねじ状砥石を噛み合い可能な位相に位置決めする
ことを特徴とするねじ状砥石の位相合わせ方法。 - ドレッシング時におけるねじ状砥石とドレッサとの噛み合いに先立って、前記ドレッサに対する前記ねじ状砥石の位相合わせを行うねじ状砥石の位相合わせ装置であって、
前記ねじ状砥石が回転して前記ドレッサに接触したときに発生する弾性波を検出する検出手段と、
前記検出手段が検出した弾性波に応じた測定値が所定値を超えたときに、前記ねじ状砥石が前記ドレッサに接触したと判定する判定手段と、
前記ねじ状砥石が前記ドレッサに接触し、且つ、前記測定値が前記所定値を超えないときに、前記測定値が前記所定値を超えるように前記ドレッサの回転数を設定するドレッサ回転数設定手段と、
前記判定手段が接触判定したときの前記ねじ状砥石の位相に基づいて、前記ねじ状砥石を噛み合い可能な位相に位置決めする砥石位相制御手段とを備える
ことを特徴とするねじ状砥石の位相合わせ装置。 - 請求項2に記載のねじ状砥石の位相合わせ装置において、
前記ドレッサ回転数設定手段は、前記ドレッサの回転数を段階的に上げる
ことを特徴とするねじ状砥石の位相合わせ装置。
Priority Applications (4)
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PCT/JP2009/066761 WO2011036790A1 (ja) | 2009-09-28 | 2009-09-28 | ねじ状砥石の位相合わせ方法及びその装置 |
CN200980161676.6A CN102574269B (zh) | 2009-09-28 | 2009-09-28 | 螺纹状砂轮的相位对合方法及其装置 |
US13/498,368 US8915768B2 (en) | 2008-07-31 | 2009-09-28 | Method of phasing threaded grinding stone, as well as device therefor |
EP09849821.5A EP2484489B1 (en) | 2009-09-28 | 2009-09-28 | Method of phasing threaded grinding stone, as well as device therefor |
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JP4648219B2 (ja) * | 2006-02-28 | 2011-03-09 | 三菱重工業株式会社 | 歯車研削盤 |
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CN102574269B (zh) | 2014-06-25 |
EP2484489B1 (en) | 2018-10-31 |
EP2484489A4 (en) | 2017-01-18 |
EP2484489A1 (en) | 2012-08-08 |
CN102574269A (zh) | 2012-07-11 |
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