TW201111076A - Device for phasing threaded grinding stone - Google Patents

Device for phasing threaded grinding stone Download PDF

Info

Publication number
TW201111076A
TW201111076A TW98132721A TW98132721A TW201111076A TW 201111076 A TW201111076 A TW 201111076A TW 98132721 A TW98132721 A TW 98132721A TW 98132721 A TW98132721 A TW 98132721A TW 201111076 A TW201111076 A TW 201111076A
Authority
TW
Taiwan
Prior art keywords
grinding wheel
spiral
phase
workpiece
dresser
Prior art date
Application number
TW98132721A
Other languages
Chinese (zh)
Other versions
TWI374068B (en
Inventor
Yoshikoto Yanase
Kazuyuki Ishizu
Tomohito Tani
Original Assignee
Mitsubishi Heavy Ind Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Ind Ltd filed Critical Mitsubishi Heavy Ind Ltd
Priority to TW98132721A priority Critical patent/TWI374068B/zh
Publication of TW201111076A publication Critical patent/TW201111076A/en
Application granted granted Critical
Publication of TWI374068B publication Critical patent/TWI374068B/zh

Links

Abstract

This invention is to provide a device for phasing a threaded grinding stone capable of precisely performing phasing of the threaded grinding stone with respect to a gear to be machined or to a dresser with a simple construction. For the purpose of achieving the above, a threaded grinding stone (14) is phased with respect to a workpiece (W) or a disk dresser (32) prior to the engagement of the threaded grinding stone (14) with the workpiece (W) or with the disk dresser (32) during grinding or dressing. In performing this phasing, an AE fluid sensor (42) provided to a grinding stone head (11) which rotatably supports the threaded grinding stone (14) is used to perform detection of whether the threaded grinding stone (14) has had contact with the workpiece (W) or the disk dresser (32). Subsequently, on the basis of the phase of the threaded grinding stone (14) at the time when contact was detected, the threaded grinding stone (14) is positioned in a phase where the aforementioned engagement is feasible.

Description

201111076 VI. Description of the Invention: [Technical Field] The present invention relates to a helical grinding wheel with respect to a machined gear before squeezing or trimming of a helical grinding wheel and a machined gear or a dish dresser Or a phase alignment device for the phase-aligned helical grinding wheel of the dish dresser. [Prior Art] Conventionally, a gear grinding machine which is a honing tool, that is, a grinding wheel, is used for honing a workpiece to be processed after heat treatment, and it is possible to efficiently finish and trim the tooth surface of the workpiece. The gear grinding machine is in a state in which the grinding wheel and the workpiece are engaged, and the synchronous rotation is performed to perform the honing of the workpiece. Therefore, if the nip accuracy is insufficient, the tooth surface of the workpiece may be unevenly honed or an excessive load may be applied. Grinding wheel to reduce the life of the grinding wheel. Therefore, in order to accurately engage the grinding wheel and the workpiece for such a gear grinding machine, the phase alignment of the phase positioning of the two is performed before the nip during the honing, so that the cutting edge (concavity and convexity) of the grinding wheel and the teeth of the workpiece The groove (concavity and convexity) becomes an appropriate phase relationship. As described above, a device for aligning the phase of the grinding wheel and the workpiece is disclosed, for example, in Patent Document 1. [PRIOR ART DOCUMENT] [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei No. 5-138438. SUMMARY OF INVENTION [Problem to be solved by the invention] -5- 201111076 The above-mentioned prior phase alignment device has a grinding wheel on its workpiece toward its axis. The direction is slid, and the contact moment and the non-contact moment when the grinding wheel passes over the thread groove of the workpiece are detected by the AE sensor, and the grinding wheel faces the workpiece toward the axis in the middle position of the thread groove calculated according to the detection result. The direction is moved, whereby the phase alignment of the grinding wheel and the workpiece is performed. However, in the above-mentioned prior configuration, the contact and non-contact of the grinding wheel to the workpiece are determined by detecting the vibration of the workpiece when the AE sensor contacts, so the gear grinding machine which can be trimmed on the machine for the grinding wheel needs to be additionally set. An AE sensor that aligns the grinding wheel and dresser phase. As a result, I am afraid that the device will be complicated. Accordingly, the present invention has been made in order to solve the above problems, and an object thereof is to provide a phase pair of a spiral grinding wheel capable of precisely aligning a phase of a spiral grinding wheel with respect to a machined gear or a dresser with a simple configuration. Quasi-device. [Means for Solving the Problem] The phase alignment device of the spiral grinding wheel according to the first invention for solving the above-mentioned problems is a honing or trimming process before the splicing of the spiral grinding wheel and the machined gear or dresser a phase alignment device for first performing a spiral grinding wheel with a phase of the helical grinding wheel aligned with respect to a machined gear or the dresser, characterized in that: a grinding wheel head provided to support the spiral grinding wheel to rotate a detecting means for detecting whether the spiral grinding wheel is in contact with the processed gear or the dresser; and -6-201111076 detecting the phase of the spiral grinding wheel at the time of contact according to the detecting means, and positioning the spiral grinding wheel The phase control method of the grinding wheel phase. A phase alignment device for a spiral grinding wheel according to a second aspect of the present invention, characterized in that the detecting means is a spiral that is permeable to vibration caused by vibration or friction by a fluid that is sprayed in the vicinity of the spiral grinding wheel. An acoustic emission type fluid sensor for detecting an elastic wave of a grinding wheel is configured to determine whether the spiral grinding wheel has contacted the machined gear or the dresser based on the detected elastic wave. A phase alignment device for a spiral grinding wheel according to a third aspect of the present invention, characterized in that the fluid sensor is a spiral from a contact position between the spiral grinding wheel and the machined gear or the dresser toward the spiral The fluid is sprayed in the direction in which the circumferential direction of the grinding wheel is offset by 90°. [Effect of the Invention] According to the phase alignment device for a spiral grinding wheel according to the present invention, whether or not the spiral grinding wheel has contacted the machined gear or by using a detecting means provided on a grinding wheel head that can support the spiral grinding wheel to rotate The dresser is tested and constructed in a simple manner to precisely align the phase of the helical grinding wheel with respect to the machined gear or dresser. [Embodiment] 201111076 [Best Embodiment of the Invention] Hereinafter, a phase alignment device for a spiral grinding wheel according to the present invention will be described in detail with reference to the drawings. [Embodiment] A gear grinding machine to which a phase alignment device for a helical grinding wheel according to the present invention is applied is honed as shown in Fig. 2 by using a barrel-shaped spiral grinding wheel 14 to grind a workpiece (machined gear) W of an internal gear material. Further, as shown in Fig. 1, it has a trimming function for trimming the spiral grinding wheel 14 by the dish dresser 32. As shown in FIGS. 1 to 3, the gear grinding machine 1 supports a movable and rotatable grinding wheel head 11» the grinding wheel head 11 rotatably supports a main shaft 1 2 'the front end of the main shaft 1 2 is formed with a grinding wheel spindle 1 3. Next, a spiral grinding wheel 14 is detachably attached to the front end of the grinding wheel spindle 13. That is, the spiral grinding wheel 14 can be rotationally driven by the grinding wheel spindle 13 of the main shaft 1 2 by driving the grinding wheel head 1 1 '. The front surface of the grinding wheel head 11 rotatably supports a rotary table 21, and the upper surface of the rotary table 21 is detachably mounted with a workpiece W through a mounting fixture (not shown). That is, by driving the rotary stage 21, the workpiece W can be rotationally driven. The side of the rotary table 21 is movably supported with a dresser drive portion 3i'. The dresser drive portion 31 is mounted with a rotatable and detachable dish-shaped dresser 32. That is, by driving the dresser driving portion 31, the dish trimmer 32 can be rotationally driven. -8 · 201111076 The front end surface of the grinding wheel head 11 is supported by an acoustic emission type AE (Acoustic Emission) fluid sensor (detection means, fluid sensor) 42 through the 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 the elastic wave is treated by an AE signal, and has a coolant C which can be used as a fluid. An injection hole 42a that is sprayed at the measurement position of the grinding wheel spindle 13 and a detection portion 42b that detects the elastic wave propagated through the coolant C from the measurement position. Further, the injection hole 42a of the AE fluid sensor 42 is connected to the coolant tank 43, on the other hand, the detection portion 42b is connected to the AE sense amplifier 4 4°, as shown in Fig. 4, before the honing When the phase alignment of the spiral grinding wheel 14 with respect to the workpiece W is performed, the AE fluid sensor 42 is disposed at a contact angle from the spiral grinding wheel 14 and the workpiece W to the circumferential direction of the spiral grinding wheel 14 by 90°. The position of the phase constitutes a state in which the coolant C is sprayed toward the measurement position of the grinding wheel spindle 13 . That is, the AE fluid sensor 42 when the phase alignment with respect to the spiral grinding wheel 14 of the workpiece W is performed is configured to be shifted from the contact position of the spiral grinding wheel 14 and the workpiece W toward the circumferential direction of the spiral grinding wheel 14. In the direction of the 90° phase, the coolant C is sprayed toward the measurement position of the grinding wheel spindle 13 . Then, as long as the setting position of the AE fluid sensor 42 is shifted in that direction according to the right-hand or left-hand rotation of the workpiece W, even when the spiral wheel 14 and the workpiece W are engaged, even the grinding wheel head 1 1 ( The spiral grinding wheel 1 4) is spirally inclined 'the AE fluid sensor 42 does not interfere with the workpiece W. Further, as shown in Fig. 5, the AE fluid sensor 4 2 is disposed on the spiral grinding wheel when the phase alignment of the spiral grinding wheel 14 with respect to the dish trimming -9 - 201111076 is performed before trimming. The contact position between the first and fourth disc dressers 32 is shifted by 9 in the circumferential direction of the spiral grinding wheel 14 (the position of the Γ phase is configured to eject the coolant C from the state to the measurement position of the grinding wheel spindle 13 from this state. That is, the helium fluid sensor 42 at the time of phase alignment with respect to the spiral grinding wheel 14 of the dish dresser 32 is formed from the contact position of the spiral grinding wheel 14 and the dish dresser 32 toward the spiral The direction of the circumference of the grinding wheel 14 is shifted by the direction of the phase of 90°, and the coolant C is ejected toward the measurement position of the grinding wheel spindle 13, and then the coolant C supplied from the coolant tank 43 to the helium fluid sensor 42 is, for example, It is a honing oil whose cooling hydraulic pressure and injection flow rate are adjusted according to the distance between the helium fluid sensor 42 and the measurement position. That is, the helium fluid sensor 42 is the coolant C supplied from the coolant tank 43. , the injection position from the injection hole 42a to the measurement position of the grinding wheel spindle 13 Thereby, the generated helical grinding wheel 14 is elastically wave-transmitted, and the detected elastic wave C is detected by the detecting unit 42b, and then the detected elastic wave is input to the AE sense amplifier 44 by the AE signal. Next, as shown in FIG. The AE sense amplifier 44 converts the input AE signal into a voltage V and displays the voltage V at any time. Further, the gear grinding machine 1 is provided with an NC device (grinding wheel phase control means) 50. The NC device 50 is, for example, connected to a grinding wheel. The head 11, the rotary table 21, the dresser drive unit 31, the AE sense amplifier 44, and the like are configured to perform workpiece W honing control of the spiral grinding wheel 14 or to perform dish shape according to various basic conditions or processing conditions of the input workpiece. The spiral grinding wheel of the dresser 3 2 - 201111076 14 trimming control, and at the same time before the honing or trimming (tooth alignment), the first determination is based on the magnitude of the elastic wave detected by the AE fluid sensor 44. When the spiral grinding wheel 14 is in contact with and non-contact with the workpiece W or the dish dresser 32, the phase adjustment of the spiral grinding wheel 14 is performed. Therefore, when the workpiece W is honed by the spiral grinding wheel 14, first, As shown in Figure 2 It is shown that the spiral grinding wheel 14 is moved to the side of the workpiece W mounted on the rotary table 21. Secondly, before the engagement of the spiral grinding wheel 14 and the workpiece W is performed, it is preferable to perform the phase alignment of the large rafts first (thick phase The alignment is prevented from interfering with the tip of the helical grinding wheel 14 and the tip of the workpiece W. Then, in this coarse phase alignment state, while rotating the helical grinding wheel 14 and the workpiece W, the AE fluid sensor 42 is simultaneously rotated. The injection hole 42 a injects the coolant C toward the measurement position of the grinding wheel spindle 13 , and the detection portion 4 2 b starts detecting the elastic wave of the spiral grinding wheel 14 . As described above, when the AE fluid sensor 42 starts detecting the elastic wave, as shown in FIG. 6, the AE sense amplifier 44 converts the input AE signal into a voltage V, and displays the voltage while passing the time. Variety. Further, while the AE fluid sensor 42 starts detecting the elastic wave, the voltage V is measured at the maximum voltage Vf when the spiral grinding wheel 14 is not in contact, and a critical 値Vo larger than the voltage Vf is automatically set. This critical enthalpy Vo is used when the contact determination of the spiral grinding wheel 14 described below is performed. Next, as long as the rotational speed (rotation speed) of the workpiece W is increased, the spiral rotation of the spiral grinding wheel 14 and the workpiece W is shifted, and the tooth surface of the workpiece W is brought into contact with the blade surface of the spiral grinding wheel 14 . In this way, the elastic wave of the spiral grinding wheel 14 generated by the contact is transmitted to the wheel center -11 - 201111076 shaft 13 , and the elastic wave transmitted to the grinding wheel spindle 13 is transmitted through the coolant C by the AE fluid sensation. The detector 42 detects it. At this time, as shown in FIG. 6, the AE sense amplifier 44 changes the waveform of the voltage V according to the input AE signal. When the voltage V (Vf) exceeds the preset threshold 値Vo, the NC device 50 determines. The workpiece W has contacted the spiral grinding wheel 14 and the phase of the spiral grinding wheel 14 is memorized. Further, by reducing the rotational speed (rotational speed) of the workpiece W, the synchronous rotation of the spiral grinding wheel 14 and the workpiece W is shifted, and the other tooth surface of the workpiece W is brought into contact with the other blade surface of the spiral grinding wheel 14. As a result, the elastic wave of the spiral grinding wheel 14 generated by the contact is transmitted to the grinding wheel spindle 13 , and the elastic wave transmitted to the grinding wheel spindle 13 is detected by the AE fluid sensor 42 through the cooling liquid C. come out. At this time, as shown in the figure, the ΑΕ sense amplifier 44 changes the waveform of the voltage V according to the input sigma signal. When the voltage V(Vf) exceeds the preset threshold 値V〇, the NC device 50 will It is determined that the workpiece W has been in contact with the spiral grinding wheel 1 4 'the spiral grinding wheel 4 phase at this time. Next, the NC device 50 calculates the phase of the intermediate spiral phase from the phase of the two helical grinding wheels 14 stored, and then positions the phase of the helical grinding wheel 14 at the intermediate phase, thereby enabling precise phase alignment. (Precision phase alignment). Then, in the precise phase alignment state 'the spiral grinding wheel 14 is engaged with the workpiece W, and then the synchronous rotation is performed', the blade surface of the spiral grinding wheel 14 can be honed to the tooth surface of the workpiece W. Here, when the specified number of workpieces W are honed using the spiral grinding wheel 14, the surface of the workpiece W is worn to cause the honing efficiency to decrease. Therefore, it is necessary to periodically perform the spiral grinding wheel 14 from the -12-201111076 dish-shaped dresser 32. Trimming. Then, when the spiral dressing wheel 14 is trimmed by the dish dresser 32, first, as shown in Fig. 1, after the spiral grinding wheel 14 is moved to the side of the dish dresser 32, before the occlusion, It is preferred to perform such large 槪 phase alignment (coarse phase alignment) to avoid interference between the tip of the spiral grinding wheel 14 and the tip of the dish dresser 32. Then, in the state of the coarse phase alignment, while the spiral dressing wheel 14 is stopped, the disc dresser 32 is rotated, and the measurement position from the injection hole 42a of the AE fluid sensor 42 toward the grinding wheel spindle 13 is performed. The coolant C is sprayed, and the detecting portion 42b starts the elastic wave detection of the spiral grinding wheel 14. As described above, when the AE fluid sensor 42 starts detecting the elastic wave, as shown in FIG. 6, the AE sense amplifier 44 converts the input AE signal into a voltage V, and displays the voltage while passing the time. Variety. In addition, while the AE fluid sensor 42 starts detecting the elastic wave, the voltage V is measured by the maximum voltage Vf when the spiral grinding wheel 14 is not in contact, and is automatically set to have a threshold 値Vo greater than the voltage Vf. . This critical enthalpy Vo is used when the contact determination of the spiral grinding wheel 14 described below is performed. Next, the spiral grinding wheel 14 is rotated forward so that one of the blade faces contacts the blade face of the dish dresser 32. As a result, the elastic wave of the spiral grinding wheel 14 generated by the contact is transmitted to the grinding wheel spindle 13 , and the elastic wave transmitted to the grinding wheel spindle 13 is detected by the AE fluid sensor 42 through the cooling liquid c. come out. At this time, as shown in FIG. 6, the AE sense amplifier 44 changes the waveform of the voltage V according to the input AE signal. When the voltage V(Vf) exceeds the threshold 値Vo set in advance, the NC device 50 determines - 13- 201111076 The spiral grinding wheel 14 has contacted the dish dresser 32, and the phase of the spiral wheel 14 is memorized. Next, the spiral grinding wheel 14 is reversed so that the other blade surface touches the other blade surface of the dish dresser 32. As a result, the elastic wave passing through the contacted spiral grinding wheel 14 is transmitted to the grinding wheel spindle 13 , and the elastic wave transmitted to the grinding wheel spindle 13 is detected by the AE flow sensor 42 through the cooling liquid C. At this time, as shown in FIG. 6, the AE senser 44 changes the waveform of the voltage V according to the input AE signal. When the pressure V(Vf) exceeds the preset threshold 値Vo, the NC device 50 determines the spiral. The grinding wheel 14 has contacted the dish dresser 32, and the phase of the rotating grinding wheel 14 is memorized. Next, after the NC device 50 calculates the intermediate phase from the two helical grinding wheels 14 stored therein, the phase of the spiral grinding wheel is positioned at the intermediate phase, whereby the phase pair can be precisely performed (precision phase alignment). Next, in the precise phase alignment state, the spiral grinding wheel 14 is engaged with the dish dresser 32, and then the disc dresser is rotated to enable the blade surface of the dish dresser 32 to trim the blade of the spiral grinding wheel 14 The embodiment is a workpiece W using an internal gear material, but a workpiece W of an external gear material may also be used. In addition, the voltage threshold used for the contact determination between the spiral grinding wheel 14 and the workpiece or the dish dresser 32 is a common threshold 値Vo, but different 値 can also be used, and the critical 値 can be used according to each material. Or processing conditions, etc. are set. Therefore, the phase of the spiral grinding wheel according to the present invention is aligned with the sand to produce the large electric power, and the screw phase 14 is the same as the 匮-14-201111076, and the spiral is honed or trimmed. Before the engagement of the grinding wheel 14 with the workpiece W or the dish dresser 32, the spiral grinding wheel 14 is supported to rotate when the phase of the spiral grinding wheel 14 is aligned with respect to the workpiece W or the dish dresser 32. The AE fluid sensor 42 disposed on the grinding wheel head 1 1 detects whether the spiral grinding wheel 14 has contacted the workpiece W or the dish dresser 32, and according to the phase of the spiral grinding wheel 14 when the contact is detected, The helical grinding wheel 14 is positioned in a phase that is engageable. In this way, the phase alignment of the spiral grinding wheel 14 with respect to the workpiece W or the dish dresser 32 can be precisely performed with a simple configuration. [Industrial Applicability] The present invention is a gear grinding machine which can be applied to a short non-processing time. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the configuration of a phase alignment device for a spiral grinding wheel according to an embodiment of the present invention, and showing a state in which a spiral dressing wheel is trimmed by a dish dresser. Fig. 2 is a view showing a state in which a workpiece is honed by a spiral grinding wheel. Fig. 3 is a view showing the mounting structure of the ae fluid sensor. Fig. 4 is a view showing the arrangement position of the a-fluid sensor with respect to the spiral grinding wheel at the time of honing. Fig. 5 is a view showing the arrangement position of the AE fluid sensor with respect to the spiral grinding wheel at the time of trimming. -15- 201111076 Figure 6 is a graph showing the voltage change when the AE fluid sensor detects the elastic wave of the spiral grinding wheel. [Description of main component symbols] 1 : Gear grinding machine 1 1 : Grinding wheel head 12 : Main shaft 1 3 : Grinding wheel spindle 1 4 : Spiral grinding wheel 2 1 : Rotating table 3 1 : Dresser driving part 3 2 : Dish dresser 41 : bracket 42 : AE fluid sensor 42 a : injection hole 42 b : detection portion 43 : coolant tank 44 : AE sense amplifier 50 : NC device W : workpiece C : coolant V : measurement voltage
Vo: voltage critical 値
Vf: maximum voltage at non-contact -16-

Claims (1)

  1. 201111076 VII. Patent application scope: 1. A phase alignment device for a spiral grinding wheel, which is to perform the spiral grinding wheel and the processed gear or the trimmer at the same time, first performing the above-mentioned spiral grinding wheel relative to the gear to be processed or a phase alignment device for a phase-aligned spiral grinding wheel, characterized in that: the spiral grinding wheel that can support the spiral grinding wheel to rotate is in contact with the processed gear or the detecting means for the trimming test; and The control means for detecting the phase of the spiral at the time of contact by the above-described detecting means to position the spiral grinding wheel at the phase of the engageable phase. 2. The spiral position aligning device according to claim 1, wherein the detecting means is a sound permeable to the spiral grinding wheel generated by the vibration or friction generated by the fluid near the spiral. The emission mode fluid sensor is configured to determine that the spiral shape has contacted the machined gear or the trimmer based on the detected elastic wave. The spiral position aligning device according to the second aspect of the invention, wherein the fluid sensor is 90° from a contact position of the spiral grinding wheel and the trimmer to the circumference of the spiral grinding wheel. The fluid is ejected in the direction of the phase. Before honing or repairing the occlusion, the dresser is marked with a wheel head, and the grinding wheel phase of the grinding wheel is checked. The phase of the grinding wheel is attached to the elastic wave. Whether the grinding wheel is the grinding gear or the direction shift -17-
TW98132721A 2009-09-28 2009-09-28 TWI374068B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW98132721A TWI374068B (en) 2009-09-28 2009-09-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW98132721A TWI374068B (en) 2009-09-28 2009-09-28

Publications (2)

Publication Number Publication Date
TW201111076A true TW201111076A (en) 2011-04-01
TWI374068B TWI374068B (en) 2012-10-11

Family

ID=44908751

Family Applications (1)

Application Number Title Priority Date Filing Date
TW98132721A TWI374068B (en) 2009-09-28 2009-09-28

Country Status (1)

Country Link
TW (1) TWI374068B (en)

Also Published As

Publication number Publication date
TWI374068B (en) 2012-10-11

Similar Documents

Publication Publication Date Title
US8858297B2 (en) Gear grinding method
CN102574268B (en) Device for phasing threaded grinding stone
JP2010029992A (en) Method of phase matching for thread-shaped grinding wheel and gear grinding machine
US8915768B2 (en) Method of phasing threaded grinding stone, as well as device therefor
JP4148166B2 (en) Contact detection device
JP2005059141A (en) Grinding method and controller of grinder
JP2010274405A (en) Method for measuring surface roughness of rotor, method for measuring projection amount of abrasive grain in grinding wheel, and grinding machine
TW201111076A (en) Device for phasing threaded grinding stone
TWI418431B (en) Phase alignment method and phase alignment device of helical wheel
JP2009214217A (en) Grinding wheel distal end position correction method and device
JP2008093788A (en) Grinder
BR112017019867B1 (en) process and grinding machine for grinding workpieces that have grooves
JP4981769B2 (en) Thread grinding wheel phasing device
JP2010030022A (en) Phase focusing method for screw-like grinding wheel and apparatus therefor
JP5297287B2 (en) Gear processing machine
US20120231702A1 (en) Method of phasing threaded grinding stone, as well as gear grinding machine
WO2011036790A1 (en) Method of phasing threaded grinding stone, as well as device therefor
JPWO2016021460A1 (en) Brush polishing apparatus and polishing method
JP3783998B2 (en) Radius measurement type sizing control method and radius measurement type sizing device
JP6135287B2 (en) Grinder
JP2010274406A (en) Method for measuring surface roughness of rotor, method for measuring projection amount of abrasive grain in grinding wheel, and grinding machine
JPH11262845A (en) Inner face grinding method
TW201111077A (en) Phase aligning method of threaded grindstone and gear grinder
JP2014155976A (en) Grinder and grinding method
JP2002059335A (en) Working fluid feeder, and working device