US20050085174A1 - Rotary abrasive material - Google Patents
Rotary abrasive material Download PDFInfo
- Publication number
- US20050085174A1 US20050085174A1 US10/504,522 US50452204A US2005085174A1 US 20050085174 A1 US20050085174 A1 US 20050085174A1 US 50452204 A US50452204 A US 50452204A US 2005085174 A1 US2005085174 A1 US 2005085174A1
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- United States
- Prior art keywords
- base plate
- abrasive material
- rotary
- abrasive
- abrasive sheet
- 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.)
- Abandoned
Links
- 239000003082 abrasive agent Substances 0.000 title claims abstract description 99
- 238000009434 installation Methods 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 abstract description 4
- 238000013021 overheating Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 11
- 230000015556 catabolic process Effects 0.000 description 5
- 238000006731 degradation reaction Methods 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 5
- 239000006061 abrasive grain Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
- B24D13/18—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor with cooling provisions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
- B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
- B24D13/16—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising pleated flaps or strips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
- B24D13/20—Mountings for the wheels
Definitions
- the present invention relates to a rotary abrasive material to be attached to a rotating tool in use.
- rotary abrasive materials of disk-like objects which can grind an object to be ground after being attached to a rotating shaft of the rotating tool such as a grinder and rotated, have been used.
- These rotary abrasive materials are, for example, for disk-grinders or for buffing disks.
- a rotary abrasive material with large-grit sandpaper for roughing and a rotary abrasive material with fine-grit sandpaper for finishing are selectively used, and the rotary abrasive material is alternatively attached to the rotating tool in such performances, orrotating tools attached with different rotary abrasive materials are separately prepared.
- a first aspect of the invention provides a rotary abrasive material, which is a disk-like object with an abrasive sheet 14 arranged on its front face and can grind an object to be ground by being attached to a rotating tool G, wherein the rotary abrasive material 10 hasabase plate 11 andan abrasive sheet installation portion 12 ; the base plate 11 being like a disk in a plan view and attachable to a rotating shaft S of the rotating tool G in the center thereof; the abrasive sheet installation portion 12 being provided extending in a radial outward direction of the base plate 11 and attached with the abrasive sheet 14 to the-front face side thereof, and-in the base plate 11 or abrasive sheet installation portion 12 is provided an air-introducing portion 15 which is a space penetrating from the back face side to the front face side and through which an airflow passes from the back face side to the front face side as the rotary abrasive material 10 rotates
- a second aspect of the present invention provides the rotary abrasive material according to the first aspect, wherein the abrasive sheet installation portion 12 is a projection portion 12 provided in plurality so as to project in the radial outward direction of the base plate 11 , wherein the air-introducing portion 15 is a space existing between the projection portions 12 , and the abrasive sheet 14 is attached to the projection portions 12 .
- a third aspect of the present invention provides the rotary abrasive material according to the second aspect, wherein an outer circumferential connecting portion 16 is formed so as to connect outer circumferential portions 12 c of the respective projection portion 12 to each other, whereby the air-introducing portion 15 is surrounded by the base plate 11 , projection portions 1 , and outer circumferential connecting portion 16 .
- a fourth aspect of the present invention provides a rotary abrasive material, which is a disk-like object with abrasive sheet 14 arranged on its front face and can grind an object to be ground by being attached to a rotating tool G, wherein the rotary abrasive material 10 has a base plate 11 that is like a disk in a plan view and attachable to a rotating shaft S of the rotating tool G in the center thereof; at least part of the front face side of the base plate 11 being attached with the abrasive sheet 14 , and in the base plate 11 is provided an air-introducing portion 15 which is a space penetrating from the back face side to the front face side and through which an airflow passes from the back face side to the front face side as the rotary abrasive material 10 rotates.
- a fifth aspect of the present invention provides a rotary abrasive material 10 , which is a disk-like object with abrasive sheets 14 , 23 arranged on its front face and can grind an object to be ground by being attached to a rotating tool G, wherein the rotary abrasive material 10 comprises a first member 1 , a second member 2 , and an attachment position adjusting means 25 , wherein the first member 1 having a base plate 11 and p projection portion 12 ; the base plate 11 being a disk in a plan view and attachable to a rotating shaft S of the rotating tool G in the center thereof; the projection portion 12 being provided in plurality so as to project in the radial outward direction of the base plate 11 and having an abrasive sheet inserting space 15 between the projection portions 12 ; the abrasive sheet 14 being attached to a one-side surface of the projection portion 12 , and the second member 2 has a base plate 21 ; the base plate 21 being like a disk in a plan view and attachable to
- a sixth aspect of the present invention provides the rotary abrasive material according to any of the second, third, and fifth aspects, wherein the abrasive sheet 14 , 23 is disposed inclined against a rotating direction of the rotary abrasive material 10 .
- FIG. 1 is a perspective view showing a method for attachment, to a rotating tool, a rotary abrasive material according to a first embodiment carried out in the present invention.
- FIG. 2 (A) is a perspective view showing, in the rotary abrasive material of the first embodiment, a condition where a second member remains retracted against a first member, and
- FIG. 2 (B) is an explanatory drawing of a side view showing a main part in the same condition.
- FIG. 3 (A) is a perspective view showing, in the rotary abrasive material of the first embodiment, a condition where a second member projects against a first member
- FIG. 3 (B) is an explanatory drawing of a side view showing a main part in the same condition.
- FIG. 4 is aperspective view showing, in the rotary abrasive material of the first embodiment, a method for combining the first member, second member, and connection member.
- FIG. 5 (A) is a plan view showing, in the rotary abrasive material of the first embodiment, a connection member, and FIG. 5 (B) is a front view of the same, and FIG. 5 (C) is a bottom view of the same.
- FIG. 6 is respectively an explanatory drawing of a plan view showing a condition where, in the rotary abrasive material of the first embodiment, the first member is attached to the connection member, wherein FIG. 6 (A) shows a case where these are engaged and FIG. 6 (B) shows a case where the first member is disengaged.
- FIG. 7 is a plan view showing, in the rotary abrasive material of the first embodiment, a base plate and a projection portion of the first member, wherein dotted line parts in the drawing show an outer circumferential connecting member.
- FIG. 8 (A) is an explanatory drawing of a side view showing, in the rotary abrasive material of the first embodiment, a main part of the first member
- FIGS. 8 (B) and 8 (C) are explanatory drawings of side views showing main parts in other embodiments.
- FIG. 9 (A) is a perspective view showing a rotary abrasive material according to another embodiment of the present invention
- FIG. 9 (B) is an explanatory drawing of a side view showing a main part of the same.
- FIG. 10 is a perspective view showing a rotary abrasive material according to further embodiment of the present invention.
- FIG. 11 is a perspective view from the back face side of a rotary abrasive material according to a second embodiment carried out in the present invention.
- FIG. 12 is a perspective view from the front face side of the rotary abrasive material according to the second embodiment carried out in the present invention.
- FIG. 1 is a perspective view showing a method for attaching the rotary abrasive material of the present embodiment to a rotating tool
- FIGS. 2 and FIGS. 3 are perspective views showing the rotary abrasive material of the present invention.
- a side of the rotary abrasive material (including afirstmember, secondmember, etc.) where an abrasive sheet is provided is referred to as a front side, and its opposite side is referred to as a rear side.
- a rotary abrasive material 10 according to the present invention is, as shown in FIG. 1 , used while being attached to a rotating shaft S of the rotating tool G such as a grinder.
- a basic structure of this rotary abrasive material 10 is a disk-like object by attaching an abrasive sheet such as sandpaper to the front face of a base plate rotated by power transmitted from the rotating shaft S of the rotating tool G.
- An attachment of the rotary abrasive material 10 to the rotating tool G is done by inserting the rotating shaft S of the rotating tool G through an inserting hole 25 k provided at the center of the rotary abrasive material 10 (in the present embodiment, at the center of a connection member 25 ) and screwing a lock nut N into the rotating shaft S.
- FIGS. 2 and FIGS. 3 show, which is provided by combining two types of members 1 and 2 in the axial direction (direction of the rotation shaft S) into one unit, as shown in FIG. 4 .
- a description will be given while referring to these members as a first member 1 and a second member 2 , respectively.
- a synthetic resin base plate 11 and a projection portion 12 are provided.
- the base plate 11 in the present embodiment is annular in appearance.
- a fitting hole 13 to accept a connection member 25 is provided in the central part of this base plate 11 .
- the connection member 25 to be attached to this fitting hole 13 is attached to the rotating shaft S of the rotating tool G to transmit power from the rotating tool G to the first member 1 .
- the projection portion 12 as an abrasive sheet installation portion is integrally provided with the base plate 11 in a radical outward direction of the base plate 11 , and at one-side surface thereof (the front face, the downward direction in FIG. 4 ,) an abrasive sheet 14 is adhered.
- the section between the projection portions 12 is a space, and this space is an air-introducing portion 15 , serving as an abrasive sheet inserting space 15 too.
- this space differently functions as an air-introducing portion 15 and as an abrasive sheet inserting space 15 , and the designations are selected depending on its effect in the following.
- the abrasive sheet 14 attached to the projection portion 12 is, same as sandpaper, a sheet made of paper, fabric or the like whose one-side face has been coated with abrasive grains such as diamond grains.
- the abrasive sheet 14 cut in a rectangular form is arranged on the projection portion 12 partially overlapped in the circumferential direction with the side coated with abrasive grains coming front, and fixed by glue or the like. Since the abrasive sheets 14 are arranged on the front face of the projection portion 12 in such a manner as in the above, the abrasive sheets 14 are inclined in a down-rearward direction of the illustration against a rotating direction R of the first member 1 , as shown in FIG. 8 (A).
- the projection portion 12 is formed with an angle against the base plate 11 in a side view. Concretely, as shown in FIG. 8 (A), the projection portion 12 is formed so as to incline, following the rotating direction R of the first member 1 , upward in the illustration. Since an end face 12 a of the front end side and an end face 12 b of the rear end side concerning the rotating direction R have been chamfered, in addition to an inclined arrangement of the abrasive sheet 14 , the air-introducing portion 15 is a smoothly inclined space without a projection against the rotating direction R.
- the projection portion 12 guides air existing in the air-introducing portion 15 in a direction from the back side to the front side of the first member (a downward direction in FIG. 8 (A)). And an airflow F thus guided passes through the air-introducing portion 15 . Therefore, while the first member 1 rotates, this airflow F is always generated and forces away of frictional heat generated between an object to be ground and the abrasive sheets 14 , whereby side effects in the conventional art such as degradation of the abrasive sheet 14 and deterioration of the object caused by the frictional heat can be prevented. Additionally, swarf caused by grinding can be removed by this airflow F too.
- the projection portion 12 may be formed parallel to the base plate 11 , as shown in FIG. 8 (B), or may be formed in a triangular form with a horizontal front face in a side view, as shown in FIG. 8 (C).
- the configuration of the projection portion 12 in a plan view is formed such that, as shown in FIG. 7 , the front-end-side end face 12 a is along the radial direction, and the rear-end-side end face 12 b heads rearward with an angle against the rotating direction R as it goes outward in the radial direction.
- the projection portion 12 functions as a blade in the fan, efficiently guiding air existing in the air-introducing portions 15 to generate an airflow F.
- a slope 19 is formed at a tip part in the radial direction of the projection portion 12 to diminish the front-end-side end face 12 a, whereby the first member 1 can be reduced in rotational resistance to generate the airflow F much more efficiently.
- an outer circumferential connecting portion 16 may be formed in a manner connecting outer circumferential portions 12 c of the respective projection portions 12 to each other so that the air-introducing portion 15 is surrounded by the base plate 11 , projection portion 12 , and outer circumferential connecting portion 16 .
- a base plate 11 into which the base plate 11 , projection portions 12 , and outer circumferential connecting portion 16 of FIG. 7 have been integrated may be formed, and a hole-like air-introducing portion 15 may be provided in the base plate 11 .
- the base plate I 1 of the first embodiment corresponds to a central part 11 x of the base plate 11 in the second embodiment
- the projection portion 12 of the first embodiment corresponds to a circumferential portion lly of the base plate 11 in the second embodiment.
- connection member 25 is sure to be used, and power from the rotating tool G is transmitted to the respective members 1 and 2 via this connection member 25 . Details of the configuration and function of this connection member 25 will be described later.
- a basic form of the second member 2 is the same as that of the first member 1 , but the base plate 21 is formed in a flat-plate form, as shown in FIG. 4 .
- a fitting hole 22 to accept the connection member 25 is provided in the central part of the base plate 21 .
- an abrasive sheet 23 is arranged on the base plate 21 with the same inclination as that of the abrasive sheet 14 of the first member 1 .
- an end portion of the abrasive sheet 23 is inserted in the base plate 21 where a notch has been formed in the radial direction before fixing the sheet by an adhesive or the like.
- the abrasive sheet 23 used on the second member 2 in the present embodiment is a fine-grit abrasive sheet with finer abrasive grains than those for the abrasive sheet 14 used on the first member 1 .
- the combination of the respective abrasive sheets 14 , 23 is not limited hereto, and a large-grit abrasive sheet may be used on the second member 2 contrary to the above. Needless to say, an abrasive sheet with an identical roughness may be used.
- connection member 25 is attached to the fitting hole 22 of the base plate 21 as an attachment position adjusting means.
- connection member 25 is cylindrical as shown in FIG. 4 and FIGS. 5 , and inside of which is provided with an inserting hole 25 k to pass the rotating shaft S of the rotating tool G in the axial direction. Also, brim-like projections 25 a, 25 d, 25 g, 25 m are provided on its outside surface.
- the projections 25 a, 25 d, 25 g are not provided across the whole circumference in the circumferential direction of the connection member 25 , and the circumference is partially notched as notches 25 b, 25 e, 25 h for attaching the base plate 21 and the base plate 11 of the first member 1 .
- the notches 25 b, 25 e, 25 h are formed at point-symmetric positions as shown in FIGS. 5 (A) and 5 (C).
- connection member 25 and the second member 2 are respectively connected.
- stoppers 25 p, 25 q, 25 r are provided in a manner blocking the engaging grooves 25 c, 25 f, 25 i.
- connection member 25 is performed by disposing the base plate 11 of the first member 1 at the engaging groove 25 f formed on the side face of the connection member 25 .
- a projection 11 a protruding into a fitting hole 13 from the base plate 11 is disposed at the engaging groove 25 f by passing the same through the notch portion 25 e formed by notching the projection 25 d on the side face of the connection member 25 , and then the base plate 11 is turned toward the connection member 25 until the projection lha is brought into contact with the stopper 25 r and fixed thereto.
- an attachment of the connection member 25 to the second member 2 is also basically same as the case of the first member 1 .
- the second member 2 can be axially changed in its attachment position in two stages for a near side and for a deep side with reference to an end-face side (upper end face of FIG. 5 (B)) of the connection member 25 .
- the projection 25 a, notch portion 25 b, near-side engaging groove 25 c, and stopper 25 p that have been formed on the connection member 25 function.
- the projection 25 g, notch 25 h, deep-side engaging groove 25 i, and stopper 25 q that have been formed on the connection member 25 function.
- a projection 21 a protruding into a fitting hole 22 from the base plate 21 is disposed at the near-side engaging groove 25 c by passing the same through the notch portion 25 b formed by notching the projection 25 a on the side face of the connection member 25 , and then the base plate 21 is turned toward the connection member 25 until the projection 21 a is brought into contact with the stopper 25 r, whereby the second member 2 is fixed to the near side.
- the base plate 21 is turned toward the connection member 25 until the projection 21 a is brought into contact with the stopper 25 q, whereby the second member 2 is fixed to the deep side.
- the respective notch portions 25 b, 25 h are formed with dislocation of a predetermined angle in a plan view. Accordingly, when the first member 1 disposed at the near-side engaging groove 25 c is shifted into the deep-side engaging groove 25 i, simply the projection 21 a of the second member 2 is turned in the circumferential direction so as to meet the same with the notch portion 25 h, no special operation required.
- connection member 25 A dropout prevention measure is provided between the connection member 25 and respective members 1 , 2 .
- a description will be given as exemplifying a case where the base plate 11 of the first member I is disposed at the engaging groove 25 f of the connection member 25 .
- the projection 11 a corresponding to the notch portion 25 e of the connection member 25 is formed in a manner projecting into the fitting hole 13 , and a stopper notch 11 b is formed at an approximately middle portion of this projection 11 a. Meanwhile, concerning the connection member 25 , a stopper projection 25 n is as well formed at a position corresponding to this stopper notch 11 b.
- This stopper projection 25 n serves as a dropout prevention means, whereby dropout of the first member 1 in the axial direction can be prevented.
- the stopper notch 11 b of the first member 1 is brought to the position of the stopper projection 25 n of the connection member 25 , the projection 11 a is brought into contact with a projection 25 m, and in this condition, the first member 1 is, while being rotated in the direction of arrow F of FIG. 6 (A), fitted until the same is brought into contact with the stopper 25 r, which is the terminal end of the engaging groove 25 f, thus the first member 1 and connection member 25 can be engaged.
- a grinding operation is performed by engaging the first member 1 with the connection member 25 as described above and then by attaching the connection member 25 to the rotating tool G.
- the rotating tool G suddenly stops because of, for example, an interruption of the power source with the first member 1 being in contact with an object to be ground in the grinding operation, as shown in FIG. 6 (B)
- only the first member 1 relatively turns in the direction of arrow S of its original movement according to the law of inertia.
- the first member 1 turns in a direction (direction of arrow S) to release an engagement with the connection member 25 .
- the projection 11 a separates from one stopper 25 r where the same has originally been in contact and hits the other stopper 25 r, stopping its rotation.
- the base plate 21 of the first member 2 selectively at either two engaging grooves 25 c, 25 i formed on the side face of the connection member 25 as an engaging groove, the axial position of the second member 2 against the first member 1 is adjustable in two stages. Thereby, the abrasive sheet 23 of the second member 2 can project and retract between the abrasive sheets 14 of the first member 1 .
- the abrasive sheet 23 of the second member 2 remains retracted against the abrasive sheets 14 of the first member 1 , as shown in FIGS. 2 . Since only the abrasive sheets 14 appear on the front side, grinding work (roughing) can be performed by the large-grit abrasive sheets 14 in this case of the present embodiment.
- the position of the second member 2 against the first member 1 can be switched as described above by selecting an engaging groove from the engaging grooves 25 c, 25 i of the connection member 25 , and the switching is also easily performed by turning the second member 2 against the connection member 25 .
- the space between the projection portions 12 of the first member 1 functions as an air-introducing portion 15 when the first member 1 is used as a single unit, and when used in combination with the second member 2 , the space does as a grinding sheet inserting space 15 to accept the abrasive sheet 23 of the second member 2 .
- a notch may be formed on the base plate 21 of the second member 2 at the position corresponding to the grinding sheet inserting space 15 of the first member 1 , or the base plate 21 may have a meshed structure so that an airflow can pass through the grinding sheet inserting space 15 . Owing to this, even when the first member 1 and second member 2 are used in combination, overheating can be prevented and swarf can be removed.
- position switching between the first member 1 and second member 2 which is in two stages in the first embodiment, may be made adjustable in three stages or more, so that the two types of abrasive sheets can be simultaneously used for processing.
- FIG. 11 and FIG. 12 are perspective views showing a rotary abrasive material of the present embodiment.
- a description will be given while using numerals identical to those of the first embodiment for parts except for ones that need to be particularly mentioned.
- the rotary abrasive material according to the present embodiment shows a modification where, in the first embodiment, the first member 1 is used as a single unit.
- a base plate 11 is provided for the rotary abrasive material according to the present embodiment as well.
- This base plate 11 has, as shown in FIG. 11 , an annular external appearance and includes the projection portion 12 of the first embodiment 1 .
- a fitting hole 13 to accept a connection member 25 is provided in the central part of this base plate 11 .
- Abrasive sheet 14 same as those of the first embodiment is adhered to a one-side surface (front surface) of the base plate 11 .
- the abrasive sheet 14 is attached not to a central part 11 X of the base plate 11 but to a circumferential part 11 y.
- An air-introducing portion 15 of the present embodiment is composed of a through hole 15 a penetrating from the front face side to the back face side in the central part 11 x of the base plate 11 as shown in FIG. 12 , and an air-taking groove 15 b formed from the central part lix to the circumferential part 11 y on the back face side of the base plate 11 , communicating with the through hole 15 a, as shown in FIG. 11 .
- the through hole 15 a is formed with an inclination to the side of a rotating direction R of the rotary abrasive material as heading from the front face side to the back face side.
- the air-taking groove 15 b has a configuration which is curved from the through hole 15 a positioned in the central part 11 x of the base plate 11 to the radial outward direction of the base plate 11 and to the rotating direction R of the rotary abrasive material, and, in addition, whose width is gradually widened toward the radial outward direction.
- a slope 11 z is formed by cutting the side surface of the base plate 11 as shown in FIG. 11 , therefore, air can be smoothly guided to the air-introducing portion 15 as the rotary abrasive material rotates.
- the through holes 15 a are formed in the central part 11 x of the base plate 11 , but the present invention is not limited hereto.
- the through holes 15 a may be formed in the circumferential part 11 y so that air flows from the sections between the abrasive sheets 14 .
- air-introducing portions 15 and through holes 15 a in the second embodiment may be provided for the projection portions 12 in the first embodiment, and the present invention can be performed in other various forms.
- This comparison test was performed, by use of a stainless steel plate (SUS304) as an object to be ground, by attaching the respective rotary abrasive materials to a disc grinder, performing grinding at a rotating speed of 11000 min ⁇ 1 , and measuring a ground amount of the object to be ground and a reduced weight amount (wheel loss) of the rotary abrasive material every three minutes, for 30 minute in total.
- SUS304 stainless steel plate
- 80 abrasive sheets whose count is 60 have been disposed per rotary abrasive material.
- the present invention has the following advantageous effects.
- the airflow passing through the air-introducing portion is always generated. Owing to this, the airflow forces away of frictional heat generated between an object to be ground and abrasive sheet, whereby side effects such as degradation of the abrasive sheet and deterioration of the object caused by the frictional heat can be prevented.
- the projection guide air existing in the air-introducing portion to one side, whereby an airflow is generated. And, this airflow always passes through the air-introducing portion as the rotary abrasive material rotates. Therefore, this air flow forces away of frictional heat generated between an object to be ground and abrasive sheet, whereby side effects such as degradation of the abrasive sheet and deterioration of the object caused by the frictional heat can be prevented.
- the position of the first member against the second member can be easily switched, it is not necessary to replace a rotary abrasive material itself at the rotating tool or to selectively use a rotating tool with a different rotary abrasive material attached thereto in view of the processing required, whereby grinding work can be easily performed.
- an airflow can smoothly pass through the air-introducing portion as the rotary abrasive material rotates, since the air-introducing portion is formed with an inclination by the abrasive sheet.
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- Polishing Bodies And Polishing Tools (AREA)
Abstract
A first member has a base plate 11 and an abrasive sheet installation portion 12 where an abrasive sheet is fixed. The base plate or the abrasive sheet installation portion is provided with an air-introducing portion 15 as a space penetrating from the back face side to the front face side of the base plate or the abrasive sheet installation portion, and an airflow passes from the back face side to the front face side as a rotary abrasive material rotates. When the first member is used as a single unit, overheating is prevented and swarf can be removed when the rotation of a projection portion as the abrasive sheet installation portion 12 generates an airflow flowing through the air-introducing portion 15. Further, when a second member is provided such that its axial position is adjustable relative to the first member, an abrasive sheet of the second member can project and retract against the first member, so that, depending on processing required, grinding work can be performed by easily switching abrasive sheets to be used.
Description
- The present invention relates to a rotary abrasive material to be attached to a rotating tool in use.
- Conventionally, rotary abrasive materials of disk-like objects, which can grind an object to be ground after being attached to a rotating shaft of the rotating tool such as a grinder and rotated, have been used. These rotary abrasive materials are, for example, for disk-grinders or for buffing disks.
- In addition, like a “grinding disk” described in Japanese Published Unexamined Patent Application No. H09-174444, a rotary abrasive material where an abrasive sheet such as sandpaper is radially arranged on the front face of a disk-like base plate has been known.
- In the rotary abrasive material of this type, frictional heat is generated in use between the object to be ground and the abrasive sheet, and degradation of the abrasive sheet and deterioration of the object is likely to occur because of the frictional heat.
- In addition, when using a rotary abrasive material, a rotary abrasive material with large-grit sandpaper for roughing and a rotary abrasive material with fine-grit sandpaper for finishing are selectively used, and the rotary abrasive material is alternatively attached to the rotating tool in such performances, orrotating tools attached with different rotary abrasive materials are separately prepared.
- In view of the above-described problems, it is a first object of the present invention to provide a rotary abrasive material which can prevent frictional heat generated between an object to be ground and abrasive sheet.
- Also, it is a second object to provide a rotary abrasive material, wherein a large-grit abrasive sheet and a fine-grit abrasive sheet can be switched without replacing the rotary abrasive material itself.
- In order to solve the above-described objects, a first aspect of the invention provides a rotary abrasive material, which is a disk-like object with an
abrasive sheet 14 arranged on its front face and can grind an object to be ground by being attached to a rotating tool G, wherein the rotaryabrasive material 10 hasabase plate11 andan abrasivesheet installation portion 12; thebase plate 11 being like a disk in a plan view and attachable to a rotating shaft S of the rotating tool G in the center thereof; the abrasivesheet installation portion 12 being provided extending in a radial outward direction of thebase plate 11 and attached with theabrasive sheet 14 to the-front face side thereof, and-in thebase plate 11 or abrasivesheet installation portion 12 is provided an air-introducingportion 15 which is a space penetrating from the back face side to the front face side and through which an airflow passes from the back face side to the front face side as the rotaryabrasive material 10 rotates. - A second aspect of the present invention provides the rotary abrasive material according to the first aspect, wherein the abrasive
sheet installation portion 12 is aprojection portion 12 provided in plurality so as to project in the radial outward direction of thebase plate 11, wherein the air-introducingportion 15 is a space existing between theprojection portions 12, and theabrasive sheet 14 is attached to theprojection portions 12. - A third aspect of the present invention provides the rotary abrasive material according to the second aspect, wherein an outer circumferential connecting
portion 16 is formed so as to connect outercircumferential portions 12 c of therespective projection portion 12 to each other, whereby the air-introducingportion 15 is surrounded by thebase plate 11,projection portions 1, and outer circumferential connectingportion 16. - A fourth aspect of the present invention provides a rotary abrasive material, which is a disk-like object with
abrasive sheet 14 arranged on its front face and can grind an object to be ground by being attached to a rotating tool G, wherein the rotaryabrasive material 10 has abase plate 11 that is like a disk in a plan view and attachable to a rotating shaft S of the rotating tool G in the center thereof; at least part of the front face side of thebase plate 11 being attached with theabrasive sheet 14, and in thebase plate 11 is provided an air-introducingportion 15 which is a space penetrating from the back face side to the front face side and through which an airflow passes from the back face side to the front face side as the rotaryabrasive material 10 rotates. - A fifth aspect of the present invention provides a rotary
abrasive material 10, which is a disk-like object withabrasive sheets abrasive material 10 comprises afirst member 1, asecond member 2, and an attachment position adjusting means 25, wherein thefirst member 1 having abase plate 11 andp projection portion 12; thebase plate 11 being a disk in a plan view and attachable to a rotating shaft S of the rotating tool G in the center thereof; theprojection portion 12 being provided in plurality so as to project in the radial outward direction of thebase plate 11 and having an abrasivesheet inserting space 15 between theprojection portions 12; theabrasive sheet 14 being attached to a one-side surface of theprojection portion 12, and thesecond member 2 has abase plate 21; thebase plate 21 being like a disk in a plan view and attachable to a rotating shaft S of the rotating tool G in the center thereof; theabrasive materials 23 being disposed on a one-side face of thebase plate 21 and at a position, in a plan view, corresponding to the abrasivesheet inserting space 15 of thefirst member 1, and the attachment position adjusting means 25 is a means for adjusting a relation of position in the axial direction in combining thefirst member 1 andsecond member 2, whereby theabrasive materials 14 of thefirst member 1 andabrasive materials 23 of thesecond member 2 alternatively disposed by combining thefirst member 1 andsecond member 2 so as to make the centers of therespective base plates abrasive sheets 23 of thesecond member 2 can project and retract against thefirst member 1. - A sixth aspect of the present invention provides the rotary abrasive material according to any of the second, third, and fifth aspects, wherein the
abrasive sheet abrasive material 10. -
FIG. 1 is a perspective view showing a method for attachment, to a rotating tool, a rotary abrasive material according to a first embodiment carried out in the present invention. -
FIG. 2 (A) is a perspective view showing, in the rotary abrasive material of the first embodiment, a condition where a second member remains retracted against a first member, and -
FIG. 2 (B) is an explanatory drawing of a side view showing a main part in the same condition. -
FIG. 3 (A) is a perspective view showing, in the rotary abrasive material of the first embodiment, a condition where a second member projects against a first member, andFIG. 3 (B) is an explanatory drawing of a side view showing a main part in the same condition. -
FIG. 4 is aperspective view showing, in the rotary abrasive material of the first embodiment, a method for combining the first member, second member, and connection member. -
FIG. 5 (A) is a plan view showing, in the rotary abrasive material of the first embodiment, a connection member, andFIG. 5 (B) is a front view of the same, andFIG. 5 (C) is a bottom view of the same. -
FIG. 6 is respectively an explanatory drawing of a plan view showing a condition where, in the rotary abrasive material of the first embodiment, the first member is attached to the connection member, whereinFIG. 6 (A) shows a case where these are engaged andFIG. 6 (B) shows a case where the first member is disengaged. -
FIG. 7 is a plan view showing, in the rotary abrasive material of the first embodiment, a base plate and a projection portion of the first member, wherein dotted line parts in the drawing show an outer circumferential connecting member. -
FIG. 8 (A) is an explanatory drawing of a side view showing, in the rotary abrasive material of the first embodiment, a main part of the first member, and FIGS. 8(B) and 8(C) are explanatory drawings of side views showing main parts in other embodiments. -
FIG. 9 (A) is a perspective view showing a rotary abrasive material according to another embodiment of the present invention, andFIG. 9 (B) is an explanatory drawing of a side view showing a main part of the same. -
FIG. 10 is a perspective view showing a rotary abrasive material according to further embodiment of the present invention. -
FIG. 11 is a perspective view from the back face side of a rotary abrasive material according to a second embodiment carried out in the present invention. -
FIG. 12 is a perspective view from the front face side of the rotary abrasive material according to the second embodiment carried out in the present invention. - First, based on the drawings, a description will be given of a rotary abrasive material according to a first embodiment carried out in the present invention.
FIG. 1 is a perspective view showing a method for attaching the rotary abrasive material of the present embodiment to a rotating tool, and FIGS. 2 and FIGS. 3 are perspective views showing the rotary abrasive material of the present invention. Here, in the description of the present invention, a side of the rotary abrasive material (including afirstmember, secondmember, etc.) where an abrasive sheet is provided is referred to as a front side, and its opposite side is referred to as a rear side. - A rotary
abrasive material 10 according to the present invention is, as shown inFIG. 1 , used while being attached to a rotating shaft S of the rotating tool G such as a grinder. A basic structure of this rotaryabrasive material 10, being same as a conventional rotary abrasive material, is a disk-like object by attaching an abrasive sheet such as sandpaper to the front face of a base plate rotated by power transmitted from the rotating shaft S of the rotating tool G. - An attachment of the rotary
abrasive material 10 to the rotating tool G is done by inserting the rotating shaft S of the rotating tool G through aninserting hole 25 k provided at the center of the rotary abrasive material 10 (in the present embodiment, at the center of a connection member 25) and screwing a lock nut N into the rotating shaft S. - An external appearance of the rotary
abrasive material 10 of the present embodiment is what FIGS. 2 and FIGS. 3 show, which is provided by combining two types ofmembers FIG. 4 . Hereinafter, a description will be given while referring to these members as afirst member 1 and asecond member 2, respectively. - For the
first member 1, as shown inFIG. 4 andFIG. 7 , a syntheticresin base plate 11 and aprojection portion 12 are provided. - The
base plate 11 in the present embodiment is annular in appearance. In the central part of thisbase plate 11, afitting hole 13 to accept aconnection member 25 is provided. Here, theconnection member 25 to be attached to thisfitting hole 13 is attached to the rotating shaft S of the rotating tool G to transmit power from the rotating tool G to thefirst member 1. - The
projection portion 12 as an abrasive sheet installation portion is integrally provided with thebase plate 11 in a radical outward direction of thebase plate 11, and at one-side surface thereof (the front face, the downward direction inFIG. 4 ,) anabrasive sheet 14 is adhered. - The section between the
projection portions 12 is a space, and this space is an air-introducingportion 15, serving as an abrasivesheet inserting space 15 too. Depending on the usage of thefirst member 1, this space differently functions as an air-introducingportion 15 and as an abrasivesheet inserting space 15, and the designations are selected depending on its effect in the following. - The
abrasive sheet 14 attached to theprojection portion 12 is, same as sandpaper, a sheet made of paper, fabric or the like whose one-side face has been coated with abrasive grains such as diamond grains. - In the present embodiment, the
abrasive sheet 14 cut in a rectangular form is arranged on theprojection portion 12 partially overlapped in the circumferential direction with the side coated with abrasive grains coming front, and fixed by glue or the like. Since theabrasive sheets 14 are arranged on the front face of theprojection portion 12 in such a manner as in the above, theabrasive sheets 14 are inclined in a down-rearward direction of the illustration against a rotating direction R of thefirst member 1, as shown inFIG. 8 (A). - The
projection portion 12 is formed with an angle against thebase plate 11 in a side view. Concretely, as shown inFIG. 8 (A), theprojection portion 12 is formed so as to incline, following the rotating direction R of thefirst member 1, upward in the illustration. Since anend face 12 a of the front end side and anend face 12 b of the rear end side concerning the rotating direction R have been chamfered, in addition to an inclined arrangement of theabrasive sheet 14, the air-introducingportion 15 is a smoothly inclined space without a projection against the rotating direction R. - As a result of such a configuration of the air-introducing
portion 15, when thefirst member 1 is attached as a single unit to the rotary tool G for use, with a rotation of thefirst member 1, theprojection portion 12 guides air existing in the air-introducingportion 15 in a direction from the back side to the front side of the first member (a downward direction inFIG. 8 (A)). And an airflow F thus guided passes through the air-introducingportion 15. Therefore, while thefirst member 1 rotates, this airflow F is always generated and forces away of frictional heat generated between an object to be ground and theabrasive sheets 14, whereby side effects in the conventional art such as degradation of theabrasive sheet 14 and deterioration of the object caused by the frictional heat can be prevented. Additionally, swarf caused by grinding can be removed by this airflow F too. - Herein, in terms of the above effect, as a result of experiments of grinding a ten-square-centimeter steel plate for three minutes, which were performed by the applicant under identical conditions, the surface temperature of the steel plate rose to 80° C. when a conventional rotary abrasive material was used, whereas it rose only to 60° C. when the
first member 1 of the present embodiment was used. Consequently, it is confirmed that the cooling effect by the airflow F was achieved effectively. - Here, for simplification of the structure, although the effect to guide air as described above lowers, the
projection portion 12 may be formed parallel to thebase plate 11, as shown inFIG. 8 (B), or may be formed in a triangular form with a horizontal front face in a side view, as shown inFIG. 8 (C). - Besides the above, the configuration of the
projection portion 12 in a plan view is formed such that, as shown inFIG. 7 , the front-end-side end face 12 a is along the radial direction, and the rear-end-side end face 12 b heads rearward with an angle against the rotating direction R as it goes outward in the radial direction. Owing to the inclination of theprojection portion 12 in a side view as described above and such configuration of the same in a plan view, theprojection portion 12 functions as a blade in the fan, efficiently guiding air existing in the air-introducingportions 15 to generate an airflow F. - As shown in
FIGS. 9 , when acurrent plate 17 is formed in a manner projecting along an approximately circumferential direction of the back face side of theprojection portion 12, and anair introducing projection 18 is formed at the back face side of the front-end-side end face 12 a (upper side inFIG. 9 (B)) in a manner projecting forward against the rotating direction R, air can be guided more efficiently to the air-introducingportion 15 to generate the airflow F. - Also, as shown in
FIG. 10 , while forming the above-mentionedcurrent plate 17, aslope 19 is formed at a tip part in the radial direction of theprojection portion 12 to diminish the front-end-side end face 12 a, whereby thefirst member 1 can be reduced in rotational resistance to generate the airflow F much more efficiently. - As shown by dotted lines in
FIG. 7 , an outercircumferential connecting portion 16 may be formed in a manner connecting outercircumferential portions 12 c of therespective projection portions 12 to each other so that the air-introducingportion 15 is surrounded by thebase plate 11,projection portion 12, and outercircumferential connecting portion 16. Furthermore, as in a second embodiment (seeFIG. 11 andFIG. 12 ) abase plate 11 into which thebase plate 11,projection portions 12, and outercircumferential connecting portion 16 ofFIG. 7 have been integrated may be formed, and a hole-like air-introducingportion 15 may be provided in thebase plate 11. In this case, the base plate I1 of the first embodiment corresponds to acentral part 11 x of thebase plate 11 in the second embodiment, while theprojection portion 12 of the first embodiment corresponds to a circumferential portion lly of thebase plate 11 in the second embodiment. - Thus far, a description has been given concerning a case where the
first member 1 is attached as a single unit to the rotating tool G for use. In the following, a description will be given concerning a case where thefirst member 1 andsecond member 2 are combined for use. - In the present embodiment, in either case where the
first member 1 is attached as a single unit to a rotating tool G for use, or where the first member I andsecond member 2 are combined for use, aconnection member 25 is sure to be used, and power from the rotating tool G is transmitted to therespective members connection member 25. Details of the configuration and function of thisconnection member 25 will be described later. - A basic form of the
second member 2 is the same as that of thefirst member 1, but thebase plate 21 is formed in a flat-plate form, as shown inFIG. 4 . - Like the
first member 1, afitting hole 22 to accept theconnection member 25 is provided in the central part of thebase plate 21. - And, in a plan view, at a position corresponding to the abrasive
sheet inserting space 15, which is a space between theprojection portions 12 of thefirst member 1, anabrasive sheet 23 is arranged on thebase plate 21 with the same inclination as that of theabrasive sheet 14 of thefirst member 1. In the present embodiment, an end portion of theabrasive sheet 23 is inserted in thebase plate 21 where a notch has been formed in the radial direction before fixing the sheet by an adhesive or the like. - The
abrasive sheet 23 used on thesecond member 2 in the present embodiment is a fine-grit abrasive sheet with finer abrasive grains than those for theabrasive sheet 14 used on thefirst member 1. However, the combination of the respectiveabrasive sheets second member 2 contrary to the above. Needless to say, an abrasive sheet with an identical roughness may be used. - And, a
connection member 25 is attached to thefitting hole 22 of thebase plate 21 as an attachment position adjusting means. - The
connection member 25 is cylindrical as shown inFIG. 4 andFIGS. 5 , and inside of which is provided with an insertinghole 25 k to pass the rotating shaft S of the rotating tool G in the axial direction. Also, brim-like projections projections connection member 25, and the circumference is partially notched asnotches base plate 21 and thebase plate 11 of thefirst member 1. And, thenotches - By disposing the
respective base plates grooves projections connection member 25 and thesecond member 2 as well as thefirst member 1 are respectively connected. At one-side terminal-end portions of theprojections connection member 25,stoppers grooves - Herein, an attachment of the
connection member 25 to thefirst member 1 is performed by disposing thebase plate 11 of thefirst member 1 at the engaginggroove 25 f formed on the side face of theconnection member 25. - Concretely, a
projection 11 a protruding into afitting hole 13 from thebase plate 11 is disposed at the engaginggroove 25 f by passing the same through thenotch portion 25 e formed by notching theprojection 25 d on the side face of theconnection member 25, and then thebase plate 11 is turned toward theconnection member 25 until the projection lha is brought into contact with thestopper 25 r and fixed thereto. - On the other hand, an attachment of the
connection member 25 to thesecond member 2 is also basically same as the case of thefirst member 1. In this case, however, thesecond member 2 can be axially changed in its attachment position in two stages for a near side and for a deep side with reference to an end-face side (upper end face ofFIG. 5 (B)) of theconnection member 25. When thesecond member 2 is disposed at the near side, theprojection 25 a,notch portion 25 b, near-side engaging groove 25 c, andstopper 25 p that have been formed on theconnection member 25 function. When thesecond member 2 is disposed at the deep side, theprojection 25 g, notch 25 h, deep-side engaging groove 25 i, andstopper 25 q that have been formed on theconnection member 25 function. - Concretely, a
projection 21 a protruding into afitting hole 22 from thebase plate 21 is disposed at the near-side engaging groove 25 c by passing the same through thenotch portion 25 b formed by notching theprojection 25 a on the side face of theconnection member 25, and then thebase plate 21 is turned toward theconnection member 25 until theprojection 21 a is brought into contact with thestopper 25 r, whereby thesecond member 2 is fixed to the near side. - Also, as similarly disposed at the deep-
side engaging groove 25 i by passing the same through thenotch portion 25 h formed by notching theprojection 25 g, thebase plate 21 is turned toward theconnection member 25 until theprojection 21 a is brought into contact with thestopper 25 q, whereby thesecond member 2 is fixed to the deep side. - Herein, the
respective notch portions first member 1 disposed at the near-side engaging groove 25 c is shifted into the deep-side engaging groove 25 i, simply theprojection 21 a of thesecond member 2 is turned in the circumferential direction so as to meet the same with thenotch portion 25 h, no special operation required. - A dropout prevention measure is provided between the
connection member 25 andrespective members base plate 11 of the first member I is disposed at the engaginggroove 25 f of theconnection member 25. - For the
base plate 11 of thefirst member 1, theprojection 11 a corresponding to thenotch portion 25 e of theconnection member 25 is formed in a manner projecting into thefitting hole 13, and astopper notch 11 b is formed at an approximately middle portion of thisprojection 11 a. Meanwhile, concerning theconnection member 25, astopper projection 25 n is as well formed at a position corresponding to thisstopper notch 11 b. - This
stopper projection 25 n serves as a dropout prevention means, whereby dropout of thefirst member 1 in the axial direction can be prevented. - As shown in
FIG. 6 (A), when thefirst member 1 is to be engaged with theconnection member 25, thestopper notch 11 b of thefirst member 1 is brought to the position of thestopper projection 25 n of theconnection member 25, theprojection 11 a is brought into contact with aprojection 25 m, and in this condition, thefirst member 1 is, while being rotated in the direction of arrow F ofFIG. 6 (A), fitted until the same is brought into contact with thestopper 25 r, which is the terminal end of the engaginggroove 25 f, thus thefirst member 1 andconnection member 25 can be engaged. - A grinding operation is performed by engaging the
first member 1 with theconnection member 25 as described above and then by attaching theconnection member 25 to the rotating tool G. In case the rotating tool G suddenly stops because of, for example, an interruption of the power source with thefirst member 1 being in contact with an object to be ground in the grinding operation, as shown inFIG. 6 (B), only thefirst member 1 relatively turns in the direction of arrow S of its original movement according to the law of inertia. Thus, only thefirst member 1 turns in a direction (direction of arrow S) to release an engagement with theconnection member 25. In such a manner, theprojection 11 a separates from onestopper 25 r where the same has originally been in contact and hits theother stopper 25 r, stopping its rotation. - In order to have the
stopper notch 11 b of thefirst member 1 and thestopper projection 25 n of theconnection member 25 at slightly dislocated position in this condition as shown inFIG. 6 (B), the respective positions are set in advance. As a result of this relation of in position, thestopper projection 25 n functions as a dropout prevention means. - And, as shown in
FIG. 6 (A), when thefirst member 1 andconnection member 25 are to be engaged, positions of both members are set in advance so that thestopper notch 11 b andstopper projection 25 n can be met and engaged. - Although, a description in the above has been given as raising an example of the
first member 1, the same applies to thesecond member 2, and consequently, the same effect as the above is provided even when thefirst member 1 andsecond member 2 are simultaneously attached to theconnection member 25. - As described in the foregoing, by disposing the
base plate 21 of thefirst member 2 selectively at either twoengaging grooves connection member 25 as an engaging groove, the axial position of thesecond member 2 against thefirst member 1 is adjustable in two stages. Thereby, theabrasive sheet 23 of thesecond member 2 can project and retract between theabrasive sheets 14 of thefirst member 1. - Accordingly, when the
projection 11 a of thefirst member 1 is disposed at the near-side engaging groove 25 c of theconnection member 25, theabrasive sheet 23 of thesecond member 2 remains retracted against theabrasive sheets 14 of thefirst member 1, as shown inFIGS. 2 . Since only theabrasive sheets 14 appear on the front side, grinding work (roughing) can be performed by the large-gritabrasive sheets 14 in this case of the present embodiment. - When the
projection 11 a of thefirst member 1 is disposed at the deep-side engaging groove 25 i of thesecond member 2, theabrasive sheets 23 of thesecond member 2 project against theabrasive sheets 14 of thefirst member 1 and cover the same, as shown inFIGS. 3 . Therefore, in this case of the present embodiment, grinding work (finishing) can be performed by the fine-gritabrasive sheet 23. - The position of the
second member 2 against thefirst member 1 can be switched as described above by selecting an engaging groove from the engaginggrooves connection member 25, and the switching is also easily performed by turning thesecond member 2 against theconnection member 25. - Accordingly, it is not necessary to replace a rotary abrasive material itself at the rotating tool G or to selectively use a rotating tool G with a different rotary abrasive material attached thereto in view of the processing as in the conventional art, whereby switching of grinding can be easily performed.
- The present invention is not limited to the embodiments as described above and can be performed in various modifications.
- For example, in the case of the first embodiment, the space between the
projection portions 12 of thefirst member 1 functions as an air-introducingportion 15 when thefirst member 1 is used as a single unit, and when used in combination with thesecond member 2, the space does as a grindingsheet inserting space 15 to accept theabrasive sheet 23 of thesecond member 2. However, a notch may be formed on thebase plate 21 of thesecond member 2 at the position corresponding to the grindingsheet inserting space 15 of thefirst member 1, or thebase plate 21 may have a meshed structure so that an airflow can pass through the grindingsheet inserting space 15. Owing to this, even when thefirst member 1 andsecond member 2 are used in combination, overheating can be prevented and swarf can be removed. - Also, by increasing the number of engaging grooves formed on the outside surface of the
connection member 25, position switching between thefirst member 1 andsecond member 2, which is in two stages in the first embodiment, may be made adjustable in three stages or more, so that the two types of abrasive sheets can be simultaneously used for processing. - Next, a description will be given while raising a rotary abrasive material against the second embodiment.
FIG. 11 andFIG. 12 are perspective views showing a rotary abrasive material of the present embodiment. Here, for the rotary abrasive material according to the present embodiment as well, a description will be given while using numerals identical to those of the first embodiment for parts except for ones that need to be particularly mentioned. - The rotary abrasive material according to the present embodiment shows a modification where, in the first embodiment, the
first member 1 is used as a single unit. - For the rotary abrasive material according to the present embodiment as well, a
base plate 11 is provided. Thisbase plate 11 has, as shown inFIG. 11 , an annular external appearance and includes theprojection portion 12 of thefirst embodiment 1. In the central part of thisbase plate 11, similar to the first embodiment, afitting hole 13 to accept aconnection member 25 is provided. -
Abrasive sheet 14 same as those of the first embodiment is adhered to a one-side surface (front surface) of thebase plate 11. Concretely, as shown inFIG. 12 , theabrasive sheet 14 is attached not to a central part 11X of thebase plate 11 but to acircumferential part 11 y. - An air-introducing
portion 15 of the present embodiment is composed of a throughhole 15 a penetrating from the front face side to the back face side in thecentral part 11 x of thebase plate 11 as shown inFIG. 12 , and an air-takinggroove 15 b formed from the central part lix to thecircumferential part 11 y on the back face side of thebase plate 11, communicating with the throughhole 15 a, as shown inFIG. 11 . - The through
hole 15 a, as shown by dotted lines inFIG. 12 , is formed with an inclination to the side of a rotating direction R of the rotary abrasive material as heading from the front face side to the back face side. And, the air-takinggroove 15 b has a configuration which is curved from the throughhole 15 a positioned in thecentral part 11 x of thebase plate 11 to the radial outward direction of thebase plate 11 and to the rotating direction R of the rotary abrasive material, and, in addition, whose width is gradually widened toward the radial outward direction. Also, on the forward side in the rotating direction R beyond the air-takinggroove 15 b, a slope 11 z is formed by cutting the side surface of thebase plate 11 as shown inFIG. 11 , therefore, air can be smoothly guided to the air-introducingportion 15 as the rotary abrasive material rotates. - By forming the air-introducing
portion 15 and slope 11 z in the form as described above, as the rotary abrasive material rotates, air is guided into the throughhole 15 a through the slope 11 z and air-takinggroove 15 b. And, the airflow thus guided passes through the throughhole 15 a and flows to the front face side of thebase plate 11. Therefore, as the rotary abrasive material rotates, like the first embodiment, this airflow is always generated and forces away of frictional heat generated between an object to be ground and theabrasive sheet 14, whereby side effects such as degradation of the abrasive sheet and deterioration of the object caused by the frictional heat can be prevented. In addition, swarf caused by grinding can also be removed by this airflow. - In the present embodiment, a form where the through
holes 15 a are formed in thecentral part 11 x of thebase plate 11 is shown, but the present invention is not limited hereto. For example, the throughholes 15 a may be formed in thecircumferential part 11 y so that air flows from the sections between theabrasive sheets 14. Also, air-introducingportions 15 and throughholes 15 a in the second embodiment may be provided for theprojection portions 12 in the first embodiment, and the present invention can be performed in other various forms. - Herein, trial manufacturing of a rotary abrasive material according to the second embodiment and a comparison test of the same performed with a conventional rotary abrasive material will be described.
- This comparison test was performed, by use of a stainless steel plate (SUS304) as an object to be ground, by attaching the respective rotary abrasive materials to a disc grinder, performing grinding at a rotating speed of 11000 min−1, and measuring a ground amount of the object to be ground and a reduced weight amount (wheel loss) of the rotary abrasive material every three minutes, for 30 minute in total. In what were used as rotary abrasive material, 80 abrasive sheets whose count is 60 have been disposed per rotary abrasive material.
- The results are as in Table 1, wherein the rotary abrasive material according to the present invention could grind away the object to be ground more than the conventional rotary abrasive material. Consequently, it is clear that a grinding operation can be more efficiently performed while removing frictional heat by airflow flowing from the front-surface side of the rotary abrasive material.
TABLE 1 Elapse of time (min.) 3 6 9 12 15 18 21 24 27 30 Total Conventional Ground 13.4 7.8 6.7 4.3 3.9 4.6 4.0 4.0 4.0 4.0 56.7 product amount (g) Wheel loss 0.9 0.1 0.3 0.0 0.2 0.3 0.3 0.3 0.3 0.3 3.0 (g) Trial Ground 16.1 10.0 7.4 4.6 5.4 5.6 4.3 4.7 6.3 11.8 76.2 product amount (g) Wheel loss 0.9 0.5 0.4 0.3 0.3 0.1 0.1 0.1 1.0 0.5 4.2 (g) - The present invention has the following advantageous effects.
- According to the first or fourth aspect of the present invention, as the rotary abrasive material rotates, an airflow passing through the air-introducing portion is always generated. Owing to this, the airflow forces away of frictional heat generated between an object to be ground and abrasive sheet, whereby side effects such as degradation of the abrasive sheet and deterioration of the object caused by the frictional heat can be prevented.
- According to the second or third aspect of the present invention, as the rotary abrasive material rotates, the projection guide air existing in the air-introducing portion to one side, whereby an airflow is generated. And, this airflow always passes through the air-introducing portion as the rotary abrasive material rotates. Therefore, this air flow forces away of frictional heat generated between an object to be ground and abrasive sheet, whereby side effects such as degradation of the abrasive sheet and deterioration of the object caused by the frictional heat can be prevented.
- According to the fifth aspect of the invention, since the position of the first member against the second member can be easily switched, it is not necessary to replace a rotary abrasive material itself at the rotating tool or to selectively use a rotating tool with a different rotary abrasive material attached thereto in view of the processing required, whereby grinding work can be easily performed.
- According to the sixth aspect of the present invention, in addition to the effects of the invention of the second, third, or fifth aspect, especially when the section between the projections is used as an air-introducing portion, an airflow can smoothly pass through the air-introducing portion as the rotary abrasive material rotates, since the air-introducing portion is formed with an inclination by the abrasive sheet.
Claims (8)
1. A rotary abrasive material, which is a disk-like object with an abrasive sheet (14) arranged on its front face and can grind an object to be ground by being attached to a rotating tool (G), wherein
the rotary abrasive material (10) has a base plate (11) and an abrasive sheet installation portion (12);
the base plate (11) being like a disk in a plan view and attachable to a rotating shaft (S) of the rotating tool (G) in the center thereof;
the abrasive sheet installation portion (12) being provided extending in a radial outward direction of the base plate (11) and attached with the abrasive sheet (14) to the front face side thereof, and
in the base plate (11) or the abrasive sheet installation portion (12) is provided an air-introducing portion (15) which is a space penetrating from the back face side to the front face side and through which an airflow passes from the back face side to the front face side as the rotary abrasive material (10) rotates.
2. The rotary abrasive material as set forth in claim 1 , wherein
the abrasive sheet installation portion (12) is a projection portion (12) provided in plurality so as to project in the radial outward direction of the base plate (11), wherein
the air-introducing portion (15) is a space existing between the projection portions (12), and
the abrasive sheet (14) is attached to the projection portion (12).
3. The rotary abrasive material as set forth in claim 2 , wherein
an outer circumferential connecting portion (16) is formed so as to connect an outer circumferential portion (12c) of the respective projection portion (12) to each other, whereby the air-introducing portion (15) is surrounded by the base plate (11), projection portion (12), and outer circumferential connecting portion (16).
4. A rotary abrasive material, which is a disk-like object with an abrasive sheet (14) arranged on its front face and can grind an object to be ground by being attached to a rotating tool (G), wherein
the rotary abrasive material (10) has a base plate (11) that is like a disk in a plan view and attachable to a rotating shaft (S) of the rotating tool (G) in the center thereof;
at least part of the front face side of the base plate (11) being attached with the abrasive sheet (14), and
in this base plate (11) is provided an air-introducing portion (15) which is a space penetrating from the back face side to the front face side and through which an airflow passes from the back face side to the front-surface side as the rotary abrasive material (10) rotates.
5. A rotary abrasive material, which is a disk-like object with abrasive sheets (14, 23) arranged on its front face and can grind an object to be ground by being attached to a rotating tool (G), wherein
the rotary abrasive material (10) comprises a first member (1), a second member (2), and an attachment position adjusting means (25), wherein
the first member (1) has a base plate (11) and a projection portion (12);
the base plate (11) being like a disk in a plan view and attachable to a rotating shaft (S) of the rotating tool (G) in the center thereof;
the projection portion (12) being provided in plurality so as to project in the radial outward direction of the base plate (11) and having an abrasive sheet inserting space (15) between the projection portions (12);
the abrasive sheet (14) being attached to a one-side face of the projection portion (12), and
the second member (2) has a base plate (21);
the base plate (21) being like a disk in a plan view and attachable to a rotating shaft (S) of the rotating tool (G) in the center thereof;
the abrasive material (23) being disposed on a one-side face of the base plate (21) and at a position, in a plan view, corresponding to the abrasive sheet inserting space (15) of the first member (1), and
the attachment position adjusting means (25) is a means for adjusting a relation of position in the axial direction in combining the first member (1) and second member (2), whereby
the abrasive material (14) of the first member (1) and the abrasive material (23) of the second member (2) are alternatively disposed by combining the first member (1) and second member (2) so as to make the centers of the respective base plates (11, 21) meet, wherein
the abrasive sheet (23) of the second member (2) can project and retract against the first member (1).
6. The rotary abrasive material as set forth in claim 2 , wherein
the abrasive sheet (14, 23) is disposed inclined against a rotating direction of the rotary abrasive material (10).
7. The rotary abrasive material as set forth in claim 3 , wherein
the abrasive sheet (14, 23) is disposed inclined against a rotating direction of the rotary abrasive material (10).
8. The rotary abrasive material as set forth in claim 5 , wherein
the abrasive sheet (14, 23) is disposed inclined against a rotating direction of the rotary abrasive material (10).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002336605 | 2002-11-20 | ||
JP2002-336605 | 2002-11-20 | ||
PCT/JP2003/013815 WO2004045805A1 (en) | 2002-11-20 | 2003-10-29 | Rotary abrasive material |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050085174A1 true US20050085174A1 (en) | 2005-04-21 |
Family
ID=32321810
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/504,522 Abandoned US20050085174A1 (en) | 2002-11-20 | 2003-10-29 | Rotary abrasive material |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050085174A1 (en) |
EP (1) | EP1586418A4 (en) |
JP (1) | JP4261484B2 (en) |
WO (1) | WO2004045805A1 (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2045039A1 (en) * | 2007-10-02 | 2009-04-08 | Gerd Eisenblätter GmbH | Grinding or polishing disk with thread element |
WO2011083010A1 (en) * | 2009-12-16 | 2011-07-14 | Rhodius Schleifwerkzeuge Gmbh & Co. Kg | Flap grinding wheel |
US20120064809A1 (en) * | 2009-05-13 | 2012-03-15 | 3M Innovative Properties Company | Tufted buffing pad |
US8430725B2 (en) | 2008-12-19 | 2013-04-30 | Jovan Pajovic | Abrasive disc construction |
EP2345506A3 (en) * | 2010-01-15 | 2015-09-23 | J. Walter Company Ltd. | An abrasive wheel comprising a fan-like structure |
DE102016102037B4 (en) * | 2015-02-05 | 2017-08-17 | Industrias Tenazit, S.A. De C.V. | Support plate for lamella grinding wheels |
ITUA20161640A1 (en) * | 2016-03-14 | 2017-09-14 | Costa Levigatrici Spa | Backing pad and quick release hook holder |
WO2018036830A1 (en) * | 2016-08-22 | 2018-03-01 | Robert Bosch Gmbh | Tool device for a hand-held power tool |
DE102017111559A1 (en) | 2017-05-26 | 2018-11-29 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Grinding tool and its use for automated post-processing of milled freeform surfaces |
US20190202027A1 (en) * | 2016-08-22 | 2019-07-04 | Robert Bosch Gmbh | Power Tool |
EP3785850A1 (en) * | 2019-08-26 | 2021-03-03 | Lake Country Tool, LLC | Cooling device for a rotating polishing disk |
RU2784913C1 (en) * | 2016-08-22 | 2022-11-30 | Роберт Бош Гмбх | Working tool for a hand-held machine |
USD978935S1 (en) | 2020-06-25 | 2023-02-21 | Saint-Gobain Abrasives, Inc. | Floor edger sanding disc |
USD978934S1 (en) | 2020-06-25 | 2023-02-21 | Saint-Gobain Abrasives, Inc. | Floor edger sanding disc |
USD978936S1 (en) | 2020-06-25 | 2023-02-21 | Saint-Gobain Abrasives, Inc. | Floor edger sanding disc |
USD978937S1 (en) | 2020-06-25 | 2023-02-21 | Saint-Gobain Abrasives, Inc. | Floor edger sanding disc |
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JP4701647B2 (en) * | 2004-07-13 | 2011-06-15 | 日産自動車株式会社 | How to repair the coating |
JP4932011B2 (en) * | 2010-01-22 | 2012-05-16 | 株式会社イチグチ | Abrasive disc |
JP2022014953A (en) * | 2020-07-08 | 2022-01-21 | 株式会社ナノテム | Grindstone |
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DE102007047131B4 (en) | 2007-10-02 | 2018-09-06 | Gerd Eisenblätter Gmbh | Rotationally symmetric grinding or polishing disc and threaded insert for this purpose |
EP2045039A1 (en) * | 2007-10-02 | 2009-04-08 | Gerd Eisenblätter GmbH | Grinding or polishing disk with thread element |
US8430725B2 (en) | 2008-12-19 | 2013-04-30 | Jovan Pajovic | Abrasive disc construction |
US20120064809A1 (en) * | 2009-05-13 | 2012-03-15 | 3M Innovative Properties Company | Tufted buffing pad |
US9415483B2 (en) * | 2009-05-13 | 2016-08-16 | 3M Innovative Properties Company | Tufted buffing pad |
WO2011083010A1 (en) * | 2009-12-16 | 2011-07-14 | Rhodius Schleifwerkzeuge Gmbh & Co. Kg | Flap grinding wheel |
EP2345506A3 (en) * | 2010-01-15 | 2015-09-23 | J. Walter Company Ltd. | An abrasive wheel comprising a fan-like structure |
DE102016102037B4 (en) * | 2015-02-05 | 2017-08-17 | Industrias Tenazit, S.A. De C.V. | Support plate for lamella grinding wheels |
ITUA20161640A1 (en) * | 2016-03-14 | 2017-09-14 | Costa Levigatrici Spa | Backing pad and quick release hook holder |
US20190202027A1 (en) * | 2016-08-22 | 2019-07-04 | Robert Bosch Gmbh | Power Tool |
EP4186664A1 (en) * | 2016-08-22 | 2023-05-31 | Robert Bosch GmbH | Tool device for a hand-held power tool |
KR20190042011A (en) * | 2016-08-22 | 2019-04-23 | 로베르트 보쉬 게엠베하 | Tooling for hand-held power tools |
WO2018036830A1 (en) * | 2016-08-22 | 2018-03-01 | Robert Bosch Gmbh | Tool device for a hand-held power tool |
US11980947B2 (en) * | 2016-08-22 | 2024-05-14 | Robert Bosch Gmbh | Power tool |
US11052564B2 (en) | 2016-08-22 | 2021-07-06 | Robert Bosch Gmbh | Tool device for a hand-held power tool |
RU2755502C2 (en) * | 2016-08-22 | 2021-09-16 | Роберт Бош Гмбх | Working tool for manual machine |
RU2784913C1 (en) * | 2016-08-22 | 2022-11-30 | Роберт Бош Гмбх | Working tool for a hand-held machine |
US11969911B2 (en) | 2016-08-22 | 2024-04-30 | Robert Bosch Gmbh | Tool device for a hand-held power tool |
KR102503312B1 (en) | 2016-08-22 | 2023-02-28 | 로베르트 보쉬 게엠베하 | Tool units for handheld power tools |
DE102017111559A1 (en) | 2017-05-26 | 2018-11-29 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Grinding tool and its use for automated post-processing of milled freeform surfaces |
DE102017111559B4 (en) | 2017-05-26 | 2023-10-26 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Grinding tool and its use for automated post-processing of milled free-form surfaces |
EP3785850A1 (en) * | 2019-08-26 | 2021-03-03 | Lake Country Tool, LLC | Cooling device for a rotating polishing disk |
USD978936S1 (en) | 2020-06-25 | 2023-02-21 | Saint-Gobain Abrasives, Inc. | Floor edger sanding disc |
USD978937S1 (en) | 2020-06-25 | 2023-02-21 | Saint-Gobain Abrasives, Inc. | Floor edger sanding disc |
USD978934S1 (en) | 2020-06-25 | 2023-02-21 | Saint-Gobain Abrasives, Inc. | Floor edger sanding disc |
USD978935S1 (en) | 2020-06-25 | 2023-02-21 | Saint-Gobain Abrasives, Inc. | Floor edger sanding disc |
Also Published As
Publication number | Publication date |
---|---|
JP4261484B2 (en) | 2009-04-30 |
EP1586418A4 (en) | 2007-01-17 |
WO2004045805A1 (en) | 2004-06-03 |
EP1586418A1 (en) | 2005-10-19 |
JPWO2004045805A1 (en) | 2006-03-16 |
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Legal Events
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AS | Assignment |
Owner name: YANASE KABUSHIKI KAISHA, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:YANASE, ISAMU;REEL/FRAME:016118/0450 Effective date: 20040730 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |