JP2013086227A - Centerless grinder - Google Patents

Centerless grinder Download PDF

Info

Publication number
JP2013086227A
JP2013086227A JP2011230578A JP2011230578A JP2013086227A JP 2013086227 A JP2013086227 A JP 2013086227A JP 2011230578 A JP2011230578 A JP 2011230578A JP 2011230578 A JP2011230578 A JP 2011230578A JP 2013086227 A JP2013086227 A JP 2013086227A
Authority
JP
Japan
Prior art keywords
wheel
cover
grinding
bed
grinding wheel
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.)
Pending
Application number
JP2011230578A
Other languages
Japanese (ja)
Inventor
Kazunori Michiyoshi
和則 道吉
Original Assignee
Komatsu Ntc Ltd
コマツNtc株式会社
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 Komatsu Ntc Ltd, コマツNtc株式会社 filed Critical Komatsu Ntc Ltd
Priority to JP2011230578A priority Critical patent/JP2013086227A/en
Publication of JP2013086227A publication Critical patent/JP2013086227A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/18Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B24B5/22Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work for grinding cylindrical surfaces, e.g. on bolts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/35Accessories
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04Protective covers for the grinding wheel

Abstract

An object of the present invention is to provide a centerless grinding machine capable of reliably preventing coolant from splashing with a small cover.
SOLUTION: A bed 10, drive devices 20 and 30 provided on the bed 10, an adjustment wheel 40 attached to a rotary shaft 22 extending from the first drive device 20, and a second drive device 30 extending from the bed. A grinding wheel 50 attached to the provided rotating shaft 32 and having an outer peripheral surface disposed opposite the outer peripheral surface of the adjustment wheel 32; a blade 60 disposed between the adjustment wheel 40 and the grinding wheel 50; A centerless grinding machine 1 for grinding the workpiece W with the grinding wheel 50 while rotating and supporting the workpiece W between the adjusting wheel 40 and the blade 60. Thus, the adjustment wheel 40 and the grinding wheel 50, the bed 10 and the driving devices 20 and 30 are partitioned by the cover 1.
[Selection] Figure 1

Description

  The present invention relates to a centerless grinding machine that grinds a workpiece with a grinding wheel while rotating and supporting the workpiece between an adjusting wheel and a blade.
  The centerless grinding machine includes an adjustment wheel, a grinding wheel disposed opposite to the adjustment wheel, and a blade disposed between the adjustment wheel and the grinding wheel, and a workpiece between the adjustment wheel and the blade. It is comprised so that a workpiece | work may be ground with a grinding wheel while rotating and supporting (for example, refer patent document 1).
JP 2010-069574 A
In a conventional centerless grinding machine, the entire grinding machine is covered with a large cover in order to prevent the coolant supplied to the grinding wheel from scattering. In this configuration, there is a problem that maintenance is complicated because it is necessary to remove a large cover when the adjustment wheel or the grinding wheel is replaced.
Moreover, when it comprises so that the site | part which a grinding wheel and a workpiece | work contact may be covered with a cover, there exists a problem that scattering of coolant cannot fully be prevented.
  An object of the present invention is to solve the above-described problems and to provide a centerless grinding machine capable of reliably preventing coolant from being scattered by a small cover.
  In order to solve the above problems, the present invention provides a bed, a driving device provided on an upper surface of the bed, an adjusting wheel attached to one rotating shaft extending from the driving device, and the driving device. A grinding wheel that is attached to the other rotary shaft that is extended and has an outer peripheral surface disposed opposite to the outer peripheral surface of the adjustment wheel; a blade that is disposed between the adjustment wheel and the grinding wheel; A centerless grinder for grinding the workpiece with the grinding wheel while rotating and supporting the workpiece between the adjustment wheel and the blade. And the said adjustment wheel and the said grinding wheel, the said bed, and the said drive device are partitioned off by the said cover.
In this configuration, since only the processing chamber in which the adjusting wheel and the grinding wheel are disposed is covered with the cover, the cover can be reduced in size while reliably preventing the coolant from scattering. And since a cover can be easily attached or detached by reducing a cover, maintainability can be improved.
Further, since the machining chamber and the drive device are partitioned by the cover, the drive device can be prevented from being affected by the heat in the cover, and the workpiece machining accuracy can be increased.
In addition, since the coolant supplied in the cover does not flow into the bed, the bed can be prevented from being affected by the heat of the coolant, the work processing accuracy can be improved, and chips accumulate in the bed. Can be prevented.
In the above-described centerless grinding machine, it is preferable that the adjusting wheel and the grinding wheel are attached to the front end portions of the rotating shafts.
In this way, when the adjustment wheel and grinding wheel are cantilevered on the rotation shaft, the adjustment wheel and grinding wheel can be easily attached to and detached from the rotation shaft within the cover. can do.
  In the above-described centerless grinding machine, when a discharge groove communicating with the outside of the cover is formed on the bottom surface in the cover, the coolant supplied into the cover can be smoothly discharged from the discharge groove. .
  In the above-described centerless grinding machine, when the adjustment wheel is fixed in the cover and the grinding wheel is configured to be movable in the cover, a space for accommodating the adjustment wheel is reduced. Therefore, the cover can be further downsized.
In the centerless grinding machine of the present invention, the cover can be reduced in size while reliably preventing the coolant from splashing, and the cover can be easily attached and detached, so that the maintainability can be improved. Further, the manufacturing cost can be reduced by downsizing the cover.
In addition, since it is possible to prevent the drive device and the bed from being affected by heat, it is possible to increase the machining accuracy of the workpiece.
Moreover, since it is possible to prevent chips from accumulating in the bed, workability can be improved.
It is the perspective view which showed the centerless grinding machine of this embodiment. It is the front view which showed the cover of this embodiment. It is the plane sectional view showing the cover of this embodiment. It is the rear view which showed the cover of this embodiment.
Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the following description, the front, rear, left, and right directions are directions shown in the drawings. These directions are set for convenience in order to easily understand the structure of the centerless grinder, and do not specify the structure of the centerless grinder of this embodiment.
As shown in FIG. 1, the centerless grinding machine 1 is disposed between the bed 10, the two drive devices 20, 30, the adjustment wheel 40, the grinding wheel 50, and the adjustment wheel 40 and the grinding wheel 50. And a cover 70 in which the adjusting wheel 40 and the grinding wheel 50 are accommodated.
As shown in FIG. 2, the centerless grinding machine 1 is configured to grind the workpiece W with the grinding wheel 50 while rotating and supporting the workpiece W between the adjusting wheel 40 and the blade 60.
  As shown in FIG. 1, the bed 10 is a plate-like member serving as a base of the centerless grinding machine 1 and is formed in a rectangular shape in plan view.
  The first drive device 20 is a device for rotating the adjustment wheel 40. The first driving device 20 is attached to the upper left side of the bed 10 and is configured to rotate the first rotating shaft 22 by the driving force of the motor 21.
  The first rotating shaft 22 is a member having a circular cross section in which the axial direction is arranged in the front-rear direction, and the rear end portion is connected to the first driving device 20. That is, the first rotating shaft 22 extends forward from the first drive device 20.
The adjustment wheel 40 is a disk-shaped member, and a rubber layer is formed on the outer periphery. As shown in FIG. 3, the front end portion of the first rotary shaft 22 is attached to the center hole 41 of the adjustment wheel 40.
As shown in FIG. 2, the first rotating shaft 22 and the adjustment wheel 40 are set to rotate counterclockwise (counterclockwise) when viewed from the front.
  The 2nd drive device 30 is an apparatus for rotating the grinding wheel 50, as shown in FIG. The second driving device 30 is attached to the upper right side of the bed 10 and is configured to rotate the second rotating shaft 32 by the driving force of the motor 31. Further, the second drive device 30 is movable to the left and right with respect to the bed 10.
  The second rotating shaft 32 is a member having a circular cross section parallel to the first rotating shaft 22 and having the same height and the axial direction arranged in the front-rear direction (see FIG. 3), and the rear end portion thereof is the second driving device 30. It is connected to. That is, the second rotating shaft 32 extends forward from the second drive device 30.
The grinding wheel 50 is a disc-shaped grinding wheel. As shown in FIG. 3, the front end portion of the second rotating shaft 32 is attached to the center hole 51 of the grinding wheel 50.
The grinding wheel 50 and the adjustment wheel 40 are arranged side by side with a space left and right, and the outer peripheral surface of the grinding wheel 50 is disposed to face the outer peripheral surface of the adjustment wheel 40.
As shown in FIG. 2, the second rotating shaft 32 and the grinding wheel 50 are set so as to rotate counterclockwise (counterclockwise) when viewed from the front.
As shown in FIG. 1, the blade 60 is a plate-like member erected on the upper surface of the bed 10 between the adjustment wheel 40 and the grinding wheel 50. As shown in FIG. 2, the blade 60 is disposed with both planes facing left and right.
The blade 60 is formed such that the upper part 62 is thinner than the lower part 61, and the upper part 62 is arranged with a space left and right with respect to the outer peripheral surface of the adjustment wheel 40. Further, the upper end surface 63 of the blade 60 is inclined so that the adjustment wheel 40 side is lowered.
In the centerless grinding machine 1, as shown in FIG. 2, when the workpiece W is inserted between the adjustment wheel 40 and the grinding wheel 50 and placed on the upper end surface of the blade 60, the workpiece W becomes the upper end surface 63 of the blade 60. The workpiece W contacts the outer peripheral surface of the adjustment wheel 40 by moving toward the adjustment wheel 40 along the inclination.
When the adjustment wheel 40 and the grinding wheel 50 are rotated counterclockwise (counterclockwise) when viewed from the front, the workpiece W in contact with the outer peripheral surface of the adjustment wheel 40 is rotated clockwise (rightward) when viewed from the front. Rotate.
As a result, the workpiece W is rotationally supported between the outer peripheral surface of the adjustment wheel 40 and the upper end surface 63 of the blade 60, and the outer peripheral surface of the grinding wheel 50 is in contact with the outer peripheral surface of the work W, so that the workpiece W is It is ground by the grinding wheel 50.
In the centerless grinding machine 1 of the present embodiment, as shown in FIG. 1, the adjustment wheel 40 and the grinding wheel 50 are accommodated in a box-shaped cover 70.
The cover 70 is a hollow hexahedron composed of an upper plate 71, a lower plate 72, a front plate 73, a rear plate 74, a right plate 75, and a left plate 76.
The front plate 73 is detachable from the front edge portions of the upper plate 71, the lower plate 72, the right plate 75, and the left plate 76 by fixing means such as bolts.
As shown in FIG. 2, an adjustment wheel 40, a grinding wheel 50, and a blade 60 are disposed inside the cover 70, and serves as a processing chamber 70 a for grinding the workpiece W.
In the centerless grinding machine 1, as shown in FIG. 1, a processing chamber 70 a in which the adjustment wheel 40 and the grinding wheel 50 are arranged and a space in which the bed 10 and the driving devices 20 and 30 are arranged are partitioned by a cover 70. It has been.
  In the cover 70, a space for accommodating the grinding wheel 50 (a space on the right side in FIG. 2) is formed larger on the left and right than a space for accommodating the adjustment wheel 40 (a space on the left side in FIG. 2). Thus, a space for moving the grinding wheel 50 to the left and right in conjunction with the second drive device 30 (see FIG. 1) is secured in the cover 70.
As shown in FIG. 3, the rear plate 74 of the cover 70 is formed with a first insertion hole 74a through which the first rotation shaft 22 is inserted and a second insertion hole 74b through which the second rotation shaft 32 is inserted. ing.
The 2nd penetration hole 74b is an elongate hole extended right and left, and the 2nd rotating shaft 32 can move to right and left (refer FIG. 4).
A flexible cover 77 covering the second insertion hole 74 b is attached to the rear surface of the rear plate 74 of the cover 70.
The flexible cover 77 is one in which one opening of a cylindrical cloth is attached around the second insertion hole 74 b and the other opening is externally fitted to the second rotating shaft 32.
The flexible cover 77 is formed with a bellows, and is configured so that the bellows expands and contracts following the movement of the second rotation shaft 32 to the left and right.
As a result, the second insertion hole 74b is closed by the flexible cover 77, and the second rotary shaft 32 is moved left and right within the second insertion hole 74b while maintaining the sealed state in the cover 70 (processing chamber 70a). The car 50 can be moved left and right within the cover 70.
In addition, in this embodiment, although the flexible cover 77 in which the bellows was formed is used, the structure of a flexible cover is not limited. For example, a flexible cover is configured by overlapping a plurality of shutters on the left and right, and the shutter 70 slides to follow the movement of the second rotation shaft 32 to the left and right, so that the sealed state in the cover 70 is maintained. May be.
As shown in FIG. 2, a discharge groove 72 b extending in the front-rear direction is formed at a position corresponding to between the adjustment wheel 40 and the grinding wheel 50 on the bottom surface 72 a in the cover 70.
The left and right sides of the discharge groove 72b are inclined so that the bottom surface 72a in the cover 70 is lowered from the left and right side edges toward the discharge groove 72b.
As shown in FIG. 1, the discharge groove 72 b is a flow path for discharging the coolant supplied into the cover 70, and is a discharge port 73 a formed in the front plate 73 and a discharge port formed in the rear plate 74. 74c (see FIG. 4).
The coolant supplied into the cover 70 flows on the bottom surface 72a, flows into the discharge groove 72b, and is stored in a tank (not shown) from each of the discharge ports 73a and 74c through a discharge pipe (not shown).
As shown in FIG. 1, the centerless grinding machine 1 as described above is configured to cover only the processing chamber 70 a in which the adjustment wheel 40 and the grinding wheel 50 are disposed with the cover 70, so that splashing of coolant is reliably prevented. Meanwhile, the cover 70 can be reduced in size. And since the cover 70 can be easily attached or detached by reducing the size of the cover 70, the maintainability can be improved.
Further, by reducing the size of the cover 70, the entire apparatus can be reduced in size and the manufacturing cost can be reduced.
In the centerless grinding machine 1 of the present embodiment, since the processing chamber 70a and the drive devices 20 and 30 are partitioned by the cover 70, the influence of heat in the cover 70 generated when the drive devices 20 and 30 grind the workpiece W. Can be prevented.
Further, since the coolant supplied into the cover 70 does not flow into the bed 10, it is possible to prevent the bed 10 from being affected by the heat of the coolant heated during grinding of the workpiece W.
Thus, since it can prevent that the components which comprise the drive devices 20 and 30 and the bed 10 thermally expand, the processing precision of the workpiece | work W can be raised.
In the centerless grinding machine 1 of the present embodiment, since the coolant supplied into the cover 70 does not flow into the bed 10, it is possible to prevent chips from accumulating in the bed 10 and improve workability. .
Furthermore, as shown in FIG. 2, since the discharge groove 72b for discharging the coolant is formed on the bottom surface 72a in the cover 70, the coolant in the cover 70 can be smoothly discharged from the discharge groove 72b.
  In the centerless grinding machine 1 of the present embodiment, as shown in FIG. 3, the adjustment wheel 40 and the grinding wheel 50 are supported by the front end portions of the rotary shafts 22 and 32, and the front plate 73 of the cover 70. By removing the, the entire adjustment wheel 40 and the entire grinding wheel 50 in the cover 70 can be exposed. Therefore, the adjustment wheel 40 and the grinding wheel 50 can be attached to and detached from the front end portions of the rotary shafts 22 and 32, and the adjustment wheel 40 and the grinding wheel 50 can be easily replaced.
The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
For example, in the present embodiment, as shown in FIG. 3, the adjustment wheel 40 and the grinding wheel 50 are cantilevered at the front end portions of the rotary shafts 22 and 32, but the adjustment wheel 40 or the grinding wheel 50 is You may comprise so that the rotating shafts 22 and 32 may be supported by both ends. In this configuration, like the rear plate 74 of the cover 70, it is necessary to form insertion holes for inserting the rotary shafts 22 and 32 in the front plate 73.
  In the present embodiment, the grinding wheel 50 is movable to the left and right. However, the grinding wheel 50 may be fixed in the cover 70. Further, the adjustment wheel 40 and the grinding wheel 50 may be configured. Both of them may be configured to move left and right by the cover 70.
  In the present embodiment, the two rotating shafts 22 and 32 are rotated by the motors 21 and 31 respectively provided in the two driving devices 20 and 30, but the two rotating shafts are driven by the driving device having one motor. You may comprise so that 22 and 32 may be rotated.
DESCRIPTION OF SYMBOLS 1 Centerless grinding machine 10 Bed 20 1st drive device 22 1st rotary shaft 30 2nd drive device 32 2nd rotary shaft 40 Adjustment wheel 50 Grinding wheel 60 Blade 63 Upper end surface 70 Cover 72a Bottom surface 72b Discharge groove 73 Front plate 74 Rear Plate 74a First insertion hole 74b Second insertion hole 77 Flexible cover W Workpiece

Claims (4)

  1. Bed and
    A driving device provided on the upper surface of the bed;
    An adjusting wheel attached to one rotating shaft extending from the drive device;
    A grinding wheel that is attached to the other rotating shaft extending from the driving device and has an outer peripheral surface disposed opposite the outer peripheral surface of the adjusting wheel;
    A blade disposed between the adjusting wheel and the grinding wheel;
    A box-shaped cover in which the adjustment wheel and the grinding wheel are housed,
    A centerless grinder that grinds the workpiece with the grinding wheel while rotatably supporting the workpiece between the adjusting wheel and the blade,
    The centerless grinding machine, wherein the adjustment wheel and the grinding wheel, the bed and the driving device are partitioned by the cover.
  2.   The centerless grinding machine according to claim 1, wherein the adjustment wheel and the grinding wheel are attached to a tip portion of each rotation shaft.
  3.   The centerless grinding machine according to claim 1 or 2, wherein a discharge groove communicating with the outside of the cover is formed on a bottom surface in the cover.
  4.   The centerless grinding machine according to any one of claims 1 to 3, wherein the adjustment wheel is fixed in the cover, and the grinding wheel is movable in the cover.
JP2011230578A 2011-10-20 2011-10-20 Centerless grinder Pending JP2013086227A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2011230578A JP2013086227A (en) 2011-10-20 2011-10-20 Centerless grinder

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2011230578A JP2013086227A (en) 2011-10-20 2011-10-20 Centerless grinder
PCT/JP2012/076760 WO2013058254A1 (en) 2011-10-20 2012-10-17 Centerless grinder
TW101138570A TW201338918A (en) 2011-10-20 2012-10-19 Centerless grinder

Publications (1)

Publication Number Publication Date
JP2013086227A true JP2013086227A (en) 2013-05-13

Family

ID=48140900

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2011230578A Pending JP2013086227A (en) 2011-10-20 2011-10-20 Centerless grinder

Country Status (3)

Country Link
JP (1) JP2013086227A (en)
TW (1) TW201338918A (en)
WO (1) WO2013058254A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104511803A (en) * 2014-12-18 2015-04-15 江门市江海区杰能机电科技有限公司 Tool sharpener with detachable dustproof cover
CN104526476A (en) * 2014-12-18 2015-04-22 江门市江海区杰能机电科技有限公司 Tool sharpener with multi-angle adjustment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111843650A (en) * 2020-07-27 2020-10-30 苏州迈斯瑞精密模具配件有限公司 Centerless grinding machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3898769A (en) * 1974-04-16 1975-08-12 Tsniitmash Method and apparatus for centreless magnetic abrasive polishing
JPH10138139A (en) * 1996-11-11 1998-05-26 Koyo Mach Ind Co Ltd Liquid coolant discharge device for centerless grinding machine
US20020193057A1 (en) * 2001-06-05 2002-12-19 Compagnie Generale Des Matieres Nucleaires Method and apparatus for rectifying cylindrical articles, in particular nuclear fuel pellets
JP2003117828A (en) * 2001-10-09 2003-04-23 Toyoda Mach Works Ltd Cover device of grinding machine
JP2008272840A (en) * 2007-04-25 2008-11-13 Nsk Ltd Cover structure for superfinishing machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3898769A (en) * 1974-04-16 1975-08-12 Tsniitmash Method and apparatus for centreless magnetic abrasive polishing
JPH10138139A (en) * 1996-11-11 1998-05-26 Koyo Mach Ind Co Ltd Liquid coolant discharge device for centerless grinding machine
US20020193057A1 (en) * 2001-06-05 2002-12-19 Compagnie Generale Des Matieres Nucleaires Method and apparatus for rectifying cylindrical articles, in particular nuclear fuel pellets
JP2003117828A (en) * 2001-10-09 2003-04-23 Toyoda Mach Works Ltd Cover device of grinding machine
JP2008272840A (en) * 2007-04-25 2008-11-13 Nsk Ltd Cover structure for superfinishing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104511803A (en) * 2014-12-18 2015-04-15 江门市江海区杰能机电科技有限公司 Tool sharpener with detachable dustproof cover
CN104526476A (en) * 2014-12-18 2015-04-22 江门市江海区杰能机电科技有限公司 Tool sharpener with multi-angle adjustment

Also Published As

Publication number Publication date
WO2013058254A1 (en) 2013-04-25
TW201338918A (en) 2013-10-01

Similar Documents

Publication Publication Date Title
KR102277372B1 (en) Industrial robot
JP2013086227A (en) Centerless grinder
JP2014231130A (en) Cordless circular saw
KR20170113169A (en) Mobile body feeding mechanism and processing apparatus
JP4381783B2 (en) Cutting equipment
JP5997520B2 (en) Machine Tools
JP5863483B2 (en) Plate member grinding machine
TWI542443B (en) Polishing device
JP2014042988A (en) Cutting machine
KR20160032196A (en) Robot
JP2017074628A (en) Machining device
TW201630686A (en) Dual-end surface grinding device
JP5901452B2 (en) Machine Tools
JP2014050899A (en) Working apparatus
KR101649973B1 (en) Air-Bearing Spindle Capable Of Tilting By Load In Machining
JP6630584B2 (en) Drill polishing equipment
JP5764424B2 (en) Spindle unit that cuts off electromagnetic vibration
JP5285757B2 (en) Double-head grinding machine
JP2020138297A (en) Chamfering machine
JP6395593B2 (en) Chuck table
TW201615330A (en) Blade cover device
JP6881037B2 (en) Electric tool
JP2014161948A (en) Grinding device and method of mounting grinding wheel
JP6523872B2 (en) Grinding device
JP6203788B2 (en) Rotary table device and electric discharge machine equipped with the rotary table device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20140715

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20150120

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20150616