KR20080100713A - Wheel with grinding grain, grinding apparatus and dresser - Google Patents

Abstract

A wheel with grinding grain, a grinding apparatus and a dresser which is welded to successively by the rotation axis direction of the wheel are provided to improve precision and efficiency in grinding work the chamfer of the board material cross section. A grinding grain wheel(1000) is comprised of a wheel part and a grain part(1020) formed in the circumferential surface of wheel part. The grinding grain wheel performs grinding work of the cross section of the board material. The abrasive layer of at least two different layers the grain part of the particle size is successively formed in the circumferential surface of the wheel part into the rotation axis direction. At least two layers grinding layers having different particle size is successivelyformed in the circumferential surface of the wheel part. More than two wheel layers are formed the wheel part, by successively welding in axis direction.

Description

Abrasive wheel, grinding device and dresser {WHEEL WITH GRINDING GRAIN, GRINDING APPARATUS AND DRESSER}

1 is a perspective view of a grinding apparatus according to the first embodiment.

FIG. 2 is a cross-sectional view of the grinding apparatus seen from the arrow direction in the II-II line of FIG.

3 is a cross-sectional view of the grinding device as seen from the arrow direction in the line II-II of FIG.

4 is a cross-sectional view of the grinding device as seen from the arrow direction in the line I′-I ′ of FIG. 1.

5 is a structural sectional view of the grinding body and the abrasive grains.

6 is a structural sectional view of the grinding body and the abrasive grains.

7 is an explanatory diagram for explaining a method for performing chamfer grinding of a cross section.

8 is an explanatory diagram for explaining a method for grinding an angled corner portion.

9 is a structural sectional view of the grinding body and the abrasive grain according to the second embodiment.

10 is a structural sectional view of the grinding body and the abrasive grain according to the second embodiment.

11 is a structural sectional view of the grinding body according to the third embodiment.

12 is a sectional view of a grinding apparatus according to the fourth embodiment.

13 is a sectional view of a grinding apparatus according to the fifth embodiment.

14 is a structural sectional view of the grinding body and the abrasive grain of the grinding apparatus shown in FIG.

Fig. 15 is a diagram showing the cross-sectional structure and method of using the dresser according to the sixth embodiment, and (b) is an enlarged view showing the cross-sectional structure of the dresser in detail.

Fig. 16 is a diagram showing the cross-sectional structure and method of using the dresser according to the seventh embodiment, and (b) is an enlarged view showing the cross-sectional structure of the dresser in detail.

* Description of the symbols for the main parts of the drawings *

10, 20 ... grinding device

100, 200, 400, 500, 700, 970, 1000 ... abrasive wheel

110, 210, 310, 710, 910, 990, 1110 ... wheel

120, 220, 320, 720, 920, 1020 ... abrasives

121 to 125, 221 to 223, 721 to 724, 1021 to 1023 ... abrasive grain layer

121F, 123F, 125F, 221F, 721F, 723F, 725F ... inclined surfaces

122C, 722C ... middle layer

126, 726 ... one layer

127, 727 ... the other side

130, 230, 1030 ... spacer

140, 240, 1040 ... bearing

141, 241, 1041 ... flange

150, 250 ... hexagon socket head cap screw

190, 290, 790, 0, 999, 1090 ... grinding bodies

300, 600, 900 ... rotary grinding tools

991, 992, 993 ... wheel layer

A1, A2, B1, B2 ... rotating shaft,

C1, C2 ... direction of rotation

P ... Plate

P1, P2, P3, P4 ... end face

1100, 1200 ... dresser

1100A, 1200A ... contact surface

1121 to 1125, 1221 to 1223 Dressing members

1121A to 1125A, 1221A to 1223A ... dress surface

Q1, Q2, Q3 ... Mounting position (設置 位置)

X ... reference axis

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an abrasive wheel, a grinding device, and a dresser for chamfering and grinding a cross section of a plate. will be.

The board | plate material which consists of a brittle material and a resin material is cut | disconnected to arbitrary shapes, and is used. The cross section of this cut board material is usually provided with the shape of an angular edge. For this reason, the chamfer grinding processing of the cross section and the grinding processing of an angled corner part are conventionally performed. In the grinding device described in Patent Document 1 below and the chamfering processing device described in Patent Document 2 below, wheel grindstones such as a plurality of grindstone end plates and wheel-shaped grinding bodies have a predetermined interval. Multi-grindstones are arranged parallel to each other, and the multi-grindstones are efficiently processed for primary, secondary and finish grinding.

Patent Document 1: Japanese Unexamined Patent Publication No. 2003-266304

Patent Document 2: Japanese Unexamined Patent Publication No. 62-176746

However, when chamfering grinding of a cross section using the above-mentioned wheel grinding machine is performed, this wheel grinding wheel has a problem that it is easy to bend because the wheel grinding wheel is thin and the precision and efficiency of grinding are lowered.

An object of the present invention is to provide an abrasive wheel, a grinding device and a dresser capable of improving the accuracy and efficiency of grinding in the case of chamfering grinding of a cross section of a plate. do.

An abrasive grain wheel according to the present invention is an abrasive grain wheel having a wheel portion to be rotated and an abrasive grain portion formed on the circumferential surface of the wheel portion, and performing chamfer grinding processing of a cross section of a sheet material, wherein the abrasive grain portion has two or more layers having different particle sizes. It is characterized in that the abrasive grain is formed sequentially on the circumferential surface of the wheel part in the rotation axis direction.

In such an abrasive wheel, the abrasive part is formed by sequentially forming two or more abrasive layers having different particle sizes in the rotational axis direction on the circumferential surface of the wheel part. Here, two or more abrasive grain layers are formed on the circumferential surface of the same wheel portion, so that the wheel portion can be thickened as compared with the first layer. As a result, the rigidity can be increased, and the abrasive wheel becomes difficult to bend. For this reason, by grinding a plate material in the state which rotates an abrasive wheel, the precision and efficiency of grinding at the time of carrying out the chamfer grinding processing of the cross section of a plate material by the abrasive layer of two or more layers of different particle sizes can be improved.

It is also preferable that the wheel portion is formed by sequentially joining two or more wheel layers in the rotation axis direction of the wheel portion. As a result, the wheel portion is formed by joining two or more wheel layers, so that the wheel portion is more difficult to bend as compared with the case where the wheel layer is one layer. As a result, only by joining two or more wheel layers, an abrasive grain wheel which is harder to bend than a wheel of an abrasive grain provided with a wheel portion composed of one wheel layer can be easily obtained.

In addition, the abrasive grains are formed by sequentially forming three or more abrasive grain layers including the first abrasive grain layer, the second abrasive grain layer, and the third abrasive grain layer in the rotational axis direction of the wheel portion, and the first abrasive grain layer is arranged in the axial direction. The third abrasive layer is located in the other layer of the outermost layer, and each particle size of the abrasive layer provided by the abrasive part is from the first abrasive layer located in one layer of the outermost layer. It is also preferable to become smaller as it faces a 2nd abrasive grain layer, and to become smaller as it goes to a 2nd abrasive grain layer from the 3rd abrasive grain layer located in the other layer of an outermost layer.

As a result, each particle size of the abrasive grain layer included in the abrasive grain portion decreases from the first abrasive grain layer located in one layer of the outermost layer toward the second abrasive grain layer and is located in the other layer of the outermost layer. It is decreasing as it goes from an abrasive grain layer to a 2nd abrasive grain layer. For this reason, when grinding a board | plate material in the state which rotated the abrasive wheel, after moving a board material from the 1st abrasive grain layer to the 3rd abrasive grain layer along the rotation axis direction of a wheel part, a 1st abrasive grain layer from a 3rd abrasive grain layer The grinding can be performed while the plate is reciprocated by grinding while the plate is moved in the direction toward. As a result, the efficiency of grinding can be further improved.

The abrasive grains are formed by sequentially forming two or more abrasive grain layers including the first abrasive grain layer and the second abrasive grain layer in the rotational axis direction of the wheel portion, and the first abrasive grain layer is one of the outermost layers in the axial alignment. It is also preferable that the second abrasive layer is located in the other layer of the outermost layer, and each particle size of the abrasive grain layer which an abrasive grain part has is made small as it goes to a 2nd abrasive grain layer from a 1st abrasive grain layer.

Each particle size of the abrasive grain layer provided with an abrasive grain part becomes small as it goes to the 2nd abrasive grain layer located in the other layer of an outermost layer from the 1st abrasive grain layer located in one layer of an outermost layer. In the case of grinding while moving the plate only in the direction from the first abrasive layer to the second abrasive layer, the grinding place polished by the small abrasive grains falls away from the rotating wheel without contacting the large abrasive grains. The plate is ground without leaving grinding marks on the surface. Thereby, the crack of the board | plate material by grinding traces is prevented and the yield of the board | plate material to be grind | polish improves, and the efficiency of grinding can be improved. Moreover, since the surface roughness of the polished sheet material is reduced, the precision of grinding can be improved.

In addition, the first abrasive layer includes a first sloped surface inclined so as to have an outer diameter toward the second abrasive layer side, and the third abrasive layer has a second sloped surface inclined so as to have an outer diameter toward the second abrasive layer side. It is also preferable to provide.

Accordingly, the first abrasive layer has a first sloped surface, and the third abrasive layer has a second sloped surface. For this reason, when grinding a plate by contacting an angled corner part of a plate and a 1st or 2nd inclined surface, it can grind the angled corner part of a plate by moving a plate material toward an abrasive wheel along the rotation axis direction of a wheel part. .

Moreover, it is also preferable that the abrasive grain which each of the abrasive grain layers with which an abrasive grain part is equipped is a super abrasive grain.

Thereby, since grinding using super abrasive grains can be performed, the efficiency of grinding can be further improved. Moreover, shape retention of an abrasive grain is improved.

The grinding apparatus according to the present invention includes a first rotary shaft and a second rotary shaft, which are parallel to the reference axis and rotate in opposite rotation directions and are parallel to each other, while being approached and spaced apart from each other and attached to the first rotary shaft. Any one abrasive wheel, any one of the second abrasive wheels attached to the second axis of rotation, and a grinding tool which is formed and is attached to the second axis of rotation and rotated, The installation position of the first abrasive wheel is characterized by being between the installation position of the second abrasive wheel and the installation position of the rotary grinding tool.

In such a grinding device, each of the first and second abrasive grain rotating wheels is attached to each of the first and second rotary shafts which rotate in the opposite rotational direction and are parallel to each other while approaching and separating each other. In addition, a rotary grinding tool in which abrasive grains are formed is attached to the second rotary shaft. Here, the installation position of the first abrasive wheel is between the installation position of the second abrasive wheel and the installation position of the rotary grinding tool. For this reason, the first abrasive wheel and the first abrasive wheel are attached to the first rotary shaft while the first and second abrasive wheels and the rotary grinding tool are rotated, respectively, approaching and spaced apart from each other; When grinding the plate between the second abrasive wheel and the rotary grinding tool attached to the two rotary shafts, the first rotary shaft side and the second rotary shaft side of the plate can be simultaneously ground while supporting the plate. As a result, the grinding efficiency at the time of chamfering grinding of the cross section of a board | plate material can be improved further.

The grinding apparatus according to the present invention, the first and second rotary shafts attached to the first rotary shaft and the first rotary shaft and the second rotary shaft which rotates in the opposite rotational direction and parallel to each other while approaching and spaced apart from each other. And a second abrasive grain wheel attached to the second rotary shaft, wherein the first abrasive grain wheel and the second abrasive grain wheel are attached to positions facing each other.

In such a grinding device, each of the first and second abrasive grain rotating wheels is attached to each of the first and second rotary shafts which rotate in the opposite rotational direction and are parallel to each other while being approached and spaced apart. In addition, the first abrasive wheel and the second abrasive wheel are attached to the position parallel to each other. For this reason, in the state which rotated the 1st and 2nd abrasive wheels, each of the 1st and 2nd rotary shafts approached and spaced apart, and between the 1st abrasive wheels and the 2nd abrasive wheels which were attached in parallel with each other. When polishing the plate, the first rotary shaft side and the second rotary shaft side of the plate can be simultaneously ground while supporting the plate. As a result, the grinding efficiency at the time of chamfering grinding of the cross section of a board | plate material can be improved further.

A dresser according to the present invention is a dresser for dressing an abrasive grain of an abrasive wheel, characterized in that two or more dressing members having different particle sizes are arranged so as to be continuous so that two or more dressing surfaces having different particle sizes are continuous.

In such a dresser, two or more dress surfaces having different particle sizes are continuous. When the dressing is made by contacting the dressing surface with an abrasive wheel having a layered abrasive grain having the same layer size as the dressing surface, dressing is performed at once without replacing the dressing members according to the size of the abrasive grains. Dressing can be done. Therefore, since the dressing time of the abrasive wheel provided with two or more abrasive layers is shortened, even when dressing is performed, the grinding efficiency can be improved.

In addition, the dresser is formed by forming three or more dressing members including the first dressing member, the second dressing member, and the third dressing member so as to be continuous, and the first dressing member is arranged in the arrangement of the dressing members arranged so as to be continuous. Located in the outer one, the third dressing member is located in the outermost other side, and each particle size of the dressing member becomes smaller as it faces from the first dressing member to the second dressing member, and from the third dressing member to the second dressing member. It is also preferable to decrease as it faces.

As a result, each particle size of the dressing member included in the dresser is reduced from the first dressing member located at the outermost one toward the second dressing member and is formed from the third dressing member located at the outermost other. 2, it becomes small as it goes to a dressing member. Also in the abrasive grains of the abrasive grain wheel having the above-described "small-mill-small" configuration, the grinding efficiency in the case of grinding the sheet material after dressing can be improved.

In addition, the dresser is formed by forming two or more dressing members including the first dressing member and the second dressing member so as to be continuous, and the first dressing member is located at the outermost side in the arrangement of the dressing members provided to be continuous. It is also preferable that the second dressing member is located on the other side of the outermost part, and each particle size of the dressing member becomes smaller as it is directed from the first dressing member to the second dressing member.

Thereby, each particle size of the dressing member with which a dresser is equipped becomes small as it goes to the 2nd dressing member located in the outermost part from the 1st dressing member located in the outermost one. Also in the abrasive grain part of the abrasive grain wheel in which the particle size arrangement has the above-mentioned "small-mill" structure, the grinding efficiency in the case of grinding a sheet material after dressing can be improved.

(Example)

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the abrasive wheel and the grinding device according to the present invention will be described in detail. Here, the same reference numerals are used for the same elements, and redundant descriptions are omitted. In addition, the dimension ratio of drawing does not necessarily correspond with content of description.

[First Embodiment]

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of grinding devices 10 and 20 according to a first embodiment in which a chamfer grinding process of a cross section of a plate P and a angular corner portion of the plate P are performed. 2 is a sectional view of the grinding apparatus 10 as seen from the arrow direction in the line II-I of FIG. 3 is sectional drawing of the grinding apparatus 10, 20 seen from the arrow direction in the II-III line of FIG. 4 is sectional drawing of the grinding apparatus 10, 20 seen from the arrow direction in the line IV'-I 'of FIG. In addition, FIG. 4 also serves as an explanatory view for explaining a method of grinding using a grinding device as described later. Each of the grinding devices 10 and 20 has a line symmetrical arrangement structure with the plate material P therebetween. Hereinafter, the structure and the like will be described with reference to Figs.

The grinding device 10 is provided with an abrasive wheel, and the grinding wheel is a device for performing the above-mentioned grinding processing on the plate P. The plate P is a brittle material such as a glass material, a ceramic material, a silicon material, or the like. It is a plate-shaped member made of a resin material.

The grinding device 10 includes a first rotary shaft A1 and a second rotary shaft A2, a first abrasive wheel 100, a second abrasive wheel 200 and a rotary grinding tool 300. The first abrasive wheel 100 is attached to the first rotary shaft A1, the second abrasive wheel 200 and the rotary grinding tool 300 is attached to the second rotary shaft A2.

First, the first rotating shaft A1 and the second rotating shaft A2 will be described. The 1st rotation shaft A1 and the 2nd rotation shaft A2 are attached to the rotation drive apparatus (not shown) which can be rotated, moving the position of each rotation shaft. The first rotary shaft A1 and the second rotary shaft A2 can approach and be spaced apart from each other while having a positional relationship parallel to each other with respect to the reference axis X by this rotary drive device. Here, in the reference axis X direction, the installation position of the first abrasive wheel 100, the second abrasive wheel 200, and the rotary grinding tool 300 is the installation position Q1 (see Fig. 2) of the first abrasive wheel; It is located between the installation position Q2 of the rotary wheel and the installation position Q3 of the rotary grinding tool. The first rotary shaft A1 and the second rotary shaft A2 can be rotated by this rotary drive device. In addition, when the first rotation shaft A1 rotates in the direction of the rotation direction C1 (for example, clockwise as shown in FIG. 3), the second rotation shaft A2 is counterclockwise as shown in FIG. Direction). That is, the first rotary shaft A1 and the second rotary shaft A2 rotate inward in the rotational direction opposite to each other. The board member P is ground in a state of being sandwiched between the first abrasive wheel 100 on the first rotary shaft A1, the second abrasive wheel 200 on the second rotary shaft A2, and the rotary grinding tool 300.

Next, the first abrasive wheel 100 will be described. The first abrasive wheel 100 includes a wheel part 110 and an abrasive part 120.

5A is a cross-sectional structural view of an example of a grinding body 190 including a first abrasive wheel 100. FIG. 5 (b) is a cross-sectional structure diagram of the abrasive grain portion 120.

First, the wheel unit 110 will be described with reference to Fig. 5A. The wheel part 110 penetrates through the bearing 140 provided with the flange part 141, and is a disk made of stainless steel (SS) which can rotate around the 1st rotating shaft A1 which the bearing 140 supports. The bearing 140 is made of an aluminum alloy treated with an alumite, has a substantially cylindrical shape, and supports the first rotating shaft A1. The spacer 130 is positioned between the wheel portion 110 and the flange portion 141. The wheel portion 110 and the flange portion 141 are fixed by screwing the hexagon socket head cap screw 150 sequentially into the wheel portion 110, the spacer 130, and the flange portion 141. Here, an example is shown below about the dimension of the grinding body 190. The diameter of the portion where the bearing 140 supports the first rotating shaft A1 is 42 mm. The height of the bearing 140 is 71 mm. In addition, the diameter of the flange part 141 is 80 mm. In addition, the diameter of the first abrasive wheel 100 is 130mm. The length of the abrasive grain 120 in the axial direction is 24 mm. In addition, the thickness of the abrasive grain 120 (that is, the radial length of the wheel portion 110) is 6 mm.

Next, the abrasive grain portion 120 will be described with reference to Fig. 5B. The abrasive grain portion 120 is a portion formed by sequentially forming five abrasive grain layers 121, 124, 122, 125, and 123 having different particle sizes in the first rotation axis A1 direction. Here, "particle size" is a unit which prescribes the range of the magnitude | size of an abrasive grain (for example, refer to GBS4130, GBSR6001). In the present specification, the smaller the particle size, the smaller the size of the eye of the test sieve through which the abrasive grain must pass. Moreover, if the abrasive grain part 120 is comprised from two or more abrasive grain layers, it will not specifically limit. More specifically, the abrasive part 120 includes five abrasive layers including a first abrasive layer 121, an intermediate abrasive layer 124, a second abrasive layer 122, an intermediate abrasive layer 125, and a third abrasive layer 123. It is formed sequentially in the direction A1 (for example, attached by electrodeposition). In addition, the abrasive grain part 120 may not be equipped with the intermediate abrasive grain layers 124 and 125. Here, as the abrasive grains contained in the abrasive layer 121, 124, 122, 125, and 123, it is preferable that they are super abrasive grains, for example, diamond, CuN (cubic boron nitride), etc. Can be mentioned.

Here, the 1st abrasive grain layer 121 is located in one layer 126 (namely, the layer provided with one surface of the abrasive grain part 120) of the outermost layer in the 1st rotation axis A1 arrangement. The third abrasive layer 123 is located at the other layer 127 (that is, the layer having the other surface of the abrasive grain 120) of the outermost layer. The number of abrasive grains of the first abrasive layer 121, the intermediate abrasive layer 124, the second abrasive layer 122, the intermediate abrasive layer 125, and the third abrasive layer 123 is 400, 400, 600 and 600, respectively. 500 and 400. That is, each particle size of the abrasive grain layer which the abrasive grain part 120 has has become small as it goes to the 2nd abrasive grain layer 122 from the 1st abrasive grain layer 121 located in one layer 126 of the outermost layer. Similarly, it becomes smaller as it goes to the 2nd abrasive grain layer 122 from the 3rd abrasive grain layer 123 located in the other layer 127 of the outermost layer mentioned above.

Moreover, the 1st abrasive grain layer 121 is equipped with the 1st inclined surface 121F in the one surface side of the abrasive grain part 120. As shown in FIG. Similarly, the third abrasive grain layer 123 is provided with the second inclined surface 123F on the other surface side of the abrasive grain portion 120. Each of the first inclined surface 121F and the second inclined surface 123F is inclined so as to increase the outer diameter toward the second abrasive layer 122 side, and is an inclined surface having an angle of 45 degrees with respect to the first rotating shaft A1 of the wheel part 110. Moreover, if the angle of these inclined surfaces is 1-89 degree, it will not specifically limit, For example, it may be 30 degree or 85 degree.

Here, an example is shown below about the dimension of the abrasive grain part 120. FIG. The longest length of each of the first abrasive layer 121, the intermediate abrasive layer 124, the second abrasive layer 122, the intermediate abrasive layer 125, and the third abrasive layer 123 is 6 mm, 3 mm, 6 mm, 3 mm, and 6 mm. The length of each of the first inclined plane 121F and the second inclined plane 123F in the axial direction is 3 mm. The second abrasive layer 122 is provided with an intermediate layer 122C which is a layer located in the middle in the direction of the first rotation axis A1, and the length of the intermediate layer 122C in the axial direction is 2 mm. The shortest distance from the intermediate layer 122C to one layer 126 of the abrasive grain 120 and the shortest distance from the intermediate layer 122C to the other layer 127 of the abrasive grain 120 are 11 mm, respectively. Further, a third inclined plane 125F for 1 degree 30 is formed from the angled corner portion of the intermediate layer 122C toward one layer 126 and the other layer 127 of the abrasive grain 120. Further, since the third inclined surface 125F is shaped, it is easy to start grinding from one end of the plate P first contacting the third inclined surface 125F. In the first abrasive layer 121, the third inclined plane 125F and the first inclined plane 121F are connected by a curved surface formed by rotating an arc, and the radius of curvature of the arc is 3 mm.

Next, the second abrasive wheel 200 and the rotary grinding tool 300 will be described. The second abrasive grain wheel 200 includes a wheel portion 210 and an abrasive grain portion 220. Further, the rotary grinding tool 300 includes an abrasive grain portion 320 in which a wheel portion 310 and abrasive grains are formed.

6A is a structural cross-sectional view of an example of a grinding body 290 including a second abrasive wheel 200 and a rotary grinding tool 300. FIG. 6 (b) is a cross-sectional view of the abrasive grain portion 220 and the abrasive grain portion 320.

First, the wheel portion 210 and the wheel portion 310 will be described with reference to Fig. 6A. Each of the wheel portion 210 and the wheel portion 310 is a disk which penetrates through a bearing 240 having a flange portion 241 and is rotatable about a second rotation shaft A2 supported by the bearing 240. The bearing 240 has a substantially cylindrical shape, and supports the second rotating shaft A2. In addition, a spacer 230 is positioned between the wheel portion 210 and the wheel portion 310. The wheel part 210, the wheel part 310, and the flange part 241 are fixed by screwing the hexagonal countersunk head screw 250 into the wheel part 310, the spacer 230, the wheel part 210, and the flange part 241 sequentially.

Here, an example is shown below about the dimension of the grinding body 290. The diameter of the part where the bearing 240 supports the second rotating shaft A2 is 42 mm. The height of the bearing 240 is 71 mm. The diameter of the flange portion 241 is 80 mm. In addition, each of the diameters of the second abrasive wheel 200 and the rotary grinding tool 300 is 130 mm. The length of each of the abrasive grains 220 and the abrasive grains 320 in the axial direction is 14 mm. In addition, the distance between the abrasive grain 220 and the abrasive grain 320 is 26 mm. In addition, each of the abrasive grains 220 and the abrasive grains 320 has a thickness of 3 mm (ie, the radial length of the wheel portion 210).

Next, the abrasive part 220 and the abrasive part 320 will be described with reference to Fig. 6B.

The abrasive grain portion 220 and the abrasive grain portion 320 have a line symmetrical arrangement structure with the spacer 230 interposed therebetween. Hereinafter, the structure and the like will be described with representative part 220 of the abrasive grains. The abrasive grain portion 220 is a portion formed by sequentially forming three abrasive grain layers 221, 222, and 223 having different particle sizes in the second rotation axis A2 direction. The number of abrasive grains of the abrasive layers 221, 222, and 223 is # 400, # 500 and # 600, respectively.

Here, an example is shown below about the dimension of the abrasive grain part 220. FIG. The longest lengths in the axial directions of the abrasive layers 221, 222, and 223 are 6 mm, 3 mm, and 5 mm, respectively. In the abrasive layer 223, the corner portion on the spacer 230 side is a curved surface formed by rotating an arc, and the radius of curvature of the arc is 0.5 mm. In the abrasive layer 223, a fourth inclined surface 221F for 1 degree 30 minutes is formed from the position of 3 mm from the surface on the spacer 230 side toward one surface of the abrasive grain 220. Moreover, since the 4th inclined surface 221F is formed, it becomes easy to start grinding from the one end of the board | plate material P which contacts the 4th inclined surface 221F for the first time. Moreover, the corner part of this one surface side of the abrasive grain part 220 is a curved surface formed by rotating a circular arc, and the radius of curvature of this circular arc is 0.5 mm.

Next, the chamfer grinding processing of the cross section of the board | plate material P and the grinding process of the angular corner part of the board | plate material P using the grinding devices 10 and 20 are demonstrated, referring FIGS. 4, 7, and 8. FIG. Although the board | substrate P is demonstrated here as a rectangle, the shape of the board | plate material P is not specifically limited, For example, it may be square. In the board | plate material P, the cross section which has a long side is called cross section P1, P2, and the cross section which has a short side is called cross section P3, P4. In addition, the grinding processing of the board | plate material P shall be performed using the grinding apparatus 10,20.

4 is an explanatory diagram for explaining a method for polishing the end faces P1, P2, and FIG. 7 is an explanatory diagram for explaining a method for chamfering grinding the end faces P3, P4, and FIG. 8 is an angle of the plate P. FIG. It is explanatory drawing explaining the method of grinding the corner part.

First, a method of polishing the end faces P1 and P2 will be described with reference to FIG. Each of the grinding devices 10 and 20 has a line symmetrical arrangement structure with the plate material P therebetween. That is, it is provided so that the 1st rotating shaft A1 of the grinding apparatus 10 and the 1st rotating shaft B1 of the grinding apparatus 20 may become parallel. Then, the sheet P is ground in the state where the plate P is sandwiched by the grinding devices 10 and 20. More specifically, the end face P1 is polished by the grinding device 10 and the end face P2 is polished by the grinding device 20. In the grinding apparatus 10, while rotating each of the 1st abrasive wheel 100, the 2nd abrasive wheel 200, and the rotary grinding tool 300, each of the 1st rotating shaft A1 and the 2nd rotating shaft A2 is approached and spaced apart, The chamfering grinding is performed on the end face P1 of the plate P while surrounding the plate P between the first abrasive wheel 100 and the second abrasive wheel 200 and the rotary grinding tool 300.

Similarly, in the grinding apparatus 20, while each of the first abrasive wheel 400, the second abrasive wheel 500, and the rotary grinding tool 600 are rotated, the first rotary shaft B1 and the second rotary shaft B2 are approached and spaced apart, The chamfering grinding of the cross section P2 of the plate P is made while enclosing the plate P between the first abrasive wheel 400, the second abrasive wheel 500, and the rotary grinding tool 600. In the state where such grinding is performed, the plate P is further moved in the axial direction of the first rotary shafts A1 and B1 (that is, the direction of the arrow) by using a support moving device (not shown in the drawing) that supports and moves the plate P. Move it. By doing in this way, it can grind efficiently from the one end to the other end of the end surface P1 and P2 of the board | plate material P simultaneously.

Next, a method of grinding the end faces P3 and P4 will be described with reference to FIG. After completion of the grinding of the end faces P1 and P2, the first rotary shafts A1 and B1 are spaced apart from each other by more than a distance between the end faces P3 and the end faces P4. Then, as shown in Fig. 7, the plate P is rotated at an angle of 90 degrees in the clockwise direction in Fig. 7, for example, by using the above-described support moving device. The first rotary shafts A1 and B1 are brought closer to each other, the end face P3 is polished by the grinding device 10, and the end face P4 is polished by the grinding device 20. Thereby, while enclosing the board | plate material P between the 1st abrasive wheel 100, the 2nd abrasive wheel 200, and the rotary grinding tool 300, the chamfer grinding process of the cross section P3 side of the board material P is performed. Similarly, chamfering grinding is performed on the end face P4 side of the plate P while surrounding the plate P between the first abrasive wheel 400 and the second abrasive wheel 500 and the rotary grinding tool 600. In such a state of grinding processing, the plate P is further moved in the axial direction of the first rotary shafts A1 and B1 (that is, the direction of the black arrow). By doing in this way, it can grind efficiently from the one end to the other end of the end surface P3, P4 of the board | plate material P simultaneously.

Next, a method of polishing the corner corners of the plate P will be described with reference to FIG. In the state in which the above-mentioned grinding processing of the end surfaces P3 and P4 is finished, the first rotary shafts A1 and B1 are brought close to each other to a distance slightly shorter than the distance between the end surfaces P3 and P4. This approach distance is determined by the desired machining dimensions of the corners. Accordingly, it is possible to bring the abrasive wheels 100, 200, 400, and 500 and the rotary grinding tools 300 and 600 closer to the sheet P side. As shown in Fig. 8, the plate shifter P is moved along the axial directions of the first rotary shafts A1 and B1 (that is, the direction of the white arrow) using the above-described support moving device. In this way, when polishing the plate P by contacting each of the two corner portions of the plate P with the first inclined surface 121F or the second inclined surface 123F, the plate along the rotation axis direction of the wheel portion 110 (that is, the axial directions of the first rotation shafts A1 and B1). By moving P toward the first abrasive wheels 100 and 400, it is possible to efficiently grind each of the two angled corner portions of the plate P simultaneously.

Second Embodiment

Fig. 9A is a structural cross sectional view of an example of the grinding body 790 including the first abrasive wheel 700 which the grinding apparatus according to the second embodiment includes. The first abrasive grain wheel 700 includes a wheel portion 710 and an abrasive grain portion 720. 9 (b) is a structural cross-sectional view of the abrasive grain 720. In addition, the grinding apparatus according to the second embodiment includes a first rotary shaft A1 and a second rotary shaft A2, a first abrasive wheel 700, a second abrasive wheel 200 and a rotary grinding tool 900. The first abrasive wheel 700 is attached to the first rotary shaft A1, the second abrasive wheel 200 and the rotary grinding tool 900 is attached to the second rotary shaft A2.

First, the wheel portion 710 will be described with reference to Fig. 9A. The wheel part 710 penetrates through the bearing 140 provided with the flange part 141, and is a disk which can be rotated centering around the 1st rotating shaft A1 which the bearing 140 supports. Here, an example is shown below about the dimension of the grinding body 790. The length of the abrasive grain 720 in the axial direction is 20 mm. In addition, the thickness of the abrasive grain 720 (ie, the radial length of the wheel portion 710) is 6 mm.

Next, the abrasive grain 720 will be described with reference to Fig. 9B. The abrasive grain portion 720 is a portion formed by sequentially forming four abrasive grain layers 721, 724, 722, and 723 having different particle sizes in the first rotation axis A1 direction. More specifically, in the abrasive part 720, four abrasive layers composed of the first abrasive layer 721, the intermediate abrasive layer 724, the second abrasive layer 722, and the third abrasive layer 723 are sequentially formed in the direction of the first axis of rotation A1. (For example by joining).

Here, the 1st abrasive grain layer 721 is located in one layer 726 (namely, the layer provided with one surface of the abrasive grain part 720) of the outermost layer in the 1st rotation axis A1 arrangement. The third abrasive layer 723 is located at the other layer 727 (that is, the layer having the other surface of the abrasive grain 720) of the outermost layer. The number of abrasive grains of the first abrasive layer 721, the intermediate abrasive layer 724, the second abrasive layer 722, and the third abrasive layer 723 is # 400, # 500, # 600, and # 500, respectively.

Moreover, the 1st abrasive grain layer 721 is equipped with the 1st inclined surface 721F in the one surface side of the abrasive grain part 720. As shown in FIG. Similarly, the third abrasive grain layer 723 is provided with the second inclined surface 723F on the other surface side of the abrasive grain portion 720. Each angle of the 1st inclined surface 721F and the 2nd inclined surface 723F is inclined so that an outer diameter may become large toward the 2nd abrasive grain layer 722 side, and is an inclined surface which has an angle of 45 degrees with respect to the 1st rotating shaft A1 of the wheel part 710. As shown in FIG.

Here, an example is shown below about the dimension of the abrasive grain part 720. FIG. The longest lengths in the axial directions of the first abrasive layer 721, the intermediate abrasive layer 724, the second abrasive layer 722, and the third abrasive layer 723 are 6 mm, 3 mm, 6 mm, and 5 mm, respectively. In addition, the length of each axial direction of the 1st inclined surface 721F and the 2nd inclined surface 723F is 3 mm. The second abrasive layer 722 is provided with an intermediate layer 722C which is a layer located in the middle in the first rotation axis A1 direction, and the length of the intermediate layer 722C in the axial direction is 2 mm. The shortest distance from the middle layer 722C to the other side of the abrasive grain 720 is 7 mm. Further, a third inclined surface 725F for 1 degree 30 is formed from the angled corner portion of the intermediate layer 722C toward one layer 726 and the other layer 727 of the abrasive grain 720. In the first abrasive layer 721, the third inclined surface 725F and the first inclined surface 721F are connected by a curved surface formed by rotating an arc, and the radius of curvature of the arc is 3 mm.

Next, the rotary grinding tool 900 will be described. The rotary grinding tool 900 includes an abrasive grain portion 920 in which a wheel portion 910 and abrasive grains are formed.

10A is a structural cross-sectional view of an example of a grinding body 890 including a second abrasive wheel 200 and a rotary grinding tool 900. FIG. 10 (b) is a cross sectional view of the abrasive grain 220 and the abrasive grain 920.

First, the wheel portion 910 will be described with reference to Fig. 10A. The wheel part 910 penetrates through the bearing 240 provided with the flange part 241, and is a disk which can be rotated centering on the 2nd rotating shaft A2 which the bearing 240 supports. The spacer 230 is positioned between the wheel portion 910 and the wheel portion 210. The wheel part 910, the wheel part 210, and the flange part 241 are fixed by screwing the hexagonal hole flat head screw 250 sequentially to the wheel part 910, the spacer 230, the wheel part 210, and the flange part 241.

Here, an example is shown about the dimension of the abrasive grain part 920 of the grinding body 890 here. The length of the abrasive grains 920 in the axial direction is 3 mm. The distance between the abrasive grains 920 and the abrasive grains 220 is 22 mm. In addition, the thickness of the abrasive grains 920 (ie, the radial length of the wheel portion 910) is 3 mm.

Next, the abrasive part 920 will be described with reference to Fig. 10B. The abrasive grain part 920 is a part which consists of one abrasive grain layer. The number of abrasive grains 920 is # 600. Here, an example is shown below about the dimension of the abrasive grain 920. Each of the two corner portions in the abrasive grain 920 is formed by a curved surface formed by rotating an arc, and the radius of curvature of the arc is 0.5 mm.

Third Embodiment

Fig. 11 is a structural sectional view of an example of a grinding body 999 including a first abrasive wheel 970 provided in the grinding apparatus according to the third embodiment. The grinding device according to the third embodiment is a device including the first abrasive wheel 970 instead of the first abrasive wheel 100 of the grinding device 10 according to the first embodiment. The first abrasive wheel 970 includes a wheel portion 990 and an abrasive grain portion 120.

The wheel part 990 is a part in which the wheel layers 991, 992, and 993 of three layers are sequentially joined in the 1st rotation axis A1 direction of the wheel part 990, and are integrated. The wheel layer included in the wheel portion 990 is not particularly limited as long as it is two or more layers. For example, two or four layers may be used.

Fourth Embodiment

Fig. 12 is a sectional view of the grinding device according to the fourth embodiment as seen from the direction perpendicular to the first rotary shaft A1 and the second rotary shaft A2 included in the grinding apparatus. The grinding device according to the fourth embodiment includes a first rotary shaft A1 and a second rotary shaft A2, a first abrasive wheel 100 and a second abrasive wheel 200. The first abrasive wheel 100 is attached to the first rotary shaft A1, the second abrasive wheel 200 is attached to the second rotary shaft A2. The first abrasive wheel 100 and the second abrasive wheel 200 are attached at positions parallel to each other, as shown in FIG. That is, the first abrasive wheel 100 and the second abrasive wheel 200 are attached to positions facing each other.

[Example 5]

Fig. 13 is a sectional view of the grinding device according to the fifth embodiment as seen from directions perpendicular to the first and second rotary shafts A1 and A2 provided in the grinding apparatus. The grinding apparatus according to the fifth embodiment includes a first rotary shaft A1 and a second rotary shaft A2, a first abrasive wheel 1000 and a second abrasive wheel 1000. The difference between the configuration of this embodiment and the configuration of the fourth embodiment is that an abrasive grain wheel 1000 is used instead of the abrasive grain wheels 100 and 200.

Next, the abrasive wheel 1000 will be described with reference to FIG. Here, Fig. 14A is a structural cross-sectional view showing an example of the grinding body 1090 including the first abrasive wheel 100, which the grinding apparatus according to the fifth embodiment includes. 14B is a structural sectional view of the abrasive grain 1020. FIG.

The difference between the first abrasive wheel 100 shown in the fourth embodiment and the abrasive wheel 1000 in the fifth embodiment lies in the cross-sectional structure of the abrasive part 1020. Referring to Fig. 14B, the abrasive grain portion 1020 is a portion formed by sequentially forming (for example, joining) three abrasive grain layers 1021, 1022, and 1023 having different particle sizes in the first rotation axis A1 direction.

Here, the 1st abrasive grain layer 1021 is located in the one layer 1026 (namely, the layer provided with one surface of the abrasive grain part 1020) of an outermost layer in the 1st rotation axis A1 arrangement. In addition, the second abrasive grain layer 1023 is located at the other layer 1027 (that is, the layer having the other surface of the abrasive grain portion 1020) of the outermost layer. Each particle size of the abrasive grain layer which the abrasive grain part 1020 has is small as it goes from the 1st abrasive grain layer 1021 located in one layer 1026 of an outermost layer toward the 2nd abrasive grain layer 1023 located in the other layer 1027 of an outermost layer. Lose. The range of sizes of the abrasive grains of the first abrasive layer 1021, the middle abrasive layer 1022, and the second abrasive layer 1023 is, for example, # 400, # 500, or # 600.

About the dimension of the abrasive grain 1020, the example is shown below. The longest length of each of the first abrasive layer 1021, the intermediate abrasive layer 1022, and the third abrasive layer 1023 in the axial direction is 5 mm, 3 mm, and 6 mm. In the abrasive layer 1023, the corner portion on the spacer 1030 side is a curved surface formed by rotating an arc, and the radius of curvature of the arc is 0.5 mm.

In the second abrasive layer 1023, a fifth inclined surface 1021F for 1 degree 30 is formed from the position located at the spacer 1030 side toward the other surface of the abrasive grain portion 1020. Moreover, since the 5th inclined surface 1021F is formed, it is easy to start grinding from the one end of the board | plate material P which contacts the 5th inclined surface 1021F for the first time. Moreover, the corner part of this one surface side of the abrasive grain part 1020 is a curved surface formed by rotating a circular arc, and the radius of curvature of this circular arc is 0.5 mm.

Next, with reference to FIG. 13, the chamfer grinding processing method of the cross section of the board | plate material P using the grinding apparatus which concerns on 5th Example, and its advantage are demonstrated. The difference between the chamfer grinding processing method shown in the first embodiment and the grinding processing method in the present embodiment lies in the transfer method of the sheet material P. In the chamfer grinding processing method (FIG. 4) shown in the first embodiment, the conveying direction of the sheet material P may be any axial direction of the first rotary shaft A1, and either of the first abrasive layer 121 and the third abrasive layer 123 You may send board P from. In the fifth embodiment, the chamfering grinding of the plate P is performed by sending the plate P in the axial direction of the first rotary shaft A1 and in one direction from the first abrasive layer 1021 side to the second abrasive layer 1023 side.

In this case, since the grinding place polished by the second abrasive layer 1023 having a small particle size is separated from the abrasive wheel 1000 without contacting the abrasive layer having the large abrasive grains, a straight deep grinding trace is applied to the surface. Plate P is ground without leaving it. As a result, cracking of the plate material P due to the grinding traces is prevented and the yield of the plate material to be polished is improved, so that the efficiency of grinding can be improved. In addition, since the surface roughness of the polished sheet material is reduced, the accuracy of grinding can be improved.

[Sixth Embodiment]

Next, referring to Fig. 15, the configuration of the stick type dresser according to the sixth embodiment will be described. Fig. 15A is a diagram showing the cross-sectional structure of the dresser according to the sixth embodiment and the method of use thereof. Fig. 15B is an enlarged view showing the cross-sectional structure of the dresser in detail.

First, the configuration of the dresser 1100 will be described with reference to Fig. 15B. The dresser 1100 is a rod-shaped member provided with three or more dressing members including the first dressing member 1121, the second dressing member 1122, and the third dressing member 1123 to be continuous. For example, the first dressing member 1121 to the third dressing member 1123 and the intermediate dressing members 1124 and 1125 are provided so as to be continuous. The dressing members 1121 to 1125 are provided with dress surfaces 1121A to 1125A, respectively, in contact with the object to be dressed. The dress surfaces 1121A to 1125A are formed to be continuous and form a contact surface 1100A. Each of the dressing members 1121 to 1125 is formed by hardening super abrasive grains, such as diamond, together with a binder, and, for example, are joined by one-piece sintering at the time of sintering. In addition, each dressing member may be formed, and then bonded by a method such as adhesion.

Here, the 1st dressing member 1121 is located in the outermost one side 1126 in the arrangement | positioning of the dressing member provided so that a 3rd dressing member 1123 is located in the outermost other side 1127. Each particle size of the dressing member decreases toward the second dressing member 1122 from the first dressing member 1121 located at the outermost one side 1126 and is second from the third dressing member 1123 located at the outermost other side 1127. It is comprised so that it may become small as it goes to the dressing member 1122. For example, the number of abrasive grains of the first dressing member 1121, the intermediate dressing member 1124, the second dressing member 1122, the intermediate dressing member 1125, and the third dressing member 1123 is 400, 500, 600, 500 and 500, respectively. ＃ 400.

Next, a method and advantages of the dresser 1100 will be described with reference to FIG. 15A.

When dressing the abrasive grain 120 of the abrasive wheel 100, the dresser 1100 is first fixed by a fixing jig (not shown) so as to expose the dress surfaces 1121A to 1125A. Next, the contact surface 1100A of the dresser 1100 is brought into close contact with the abrasive part 120 while the abrasive rotating wheel 100 is rotated with the first rotating shaft A1 as the axis. More specifically, as shown in Fig. 15 (b), the contact surface 1100A is placed on the abrasive portion 120 such that the dressing surface 1121A to 1125A of the dresser 1100 and the arrangement of the abrasive layers 121 to 125 of the abrasive portion 120 face each other. Close contact In this case, since the grain sizes of the abrasive grain layers 121 to 125 and the particle sizes of the dress surfaces 1121A to 1125A are matched, the dressing can be applied to the abrasive grain layers 121 to 125 of the abrasive grain portion 120 without changing the dresser used for dressing. . For example, with respect to the abrasive grain layers 121 to 125 of the abrasive grain portion 120 having a particle size arrangement of "small-mill-small", dressing can be performed without changing the dresser according to five different abrasive layers. have.

[Example 7]

Next, referring to Fig. 16, the configuration of the dresser according to the seventh embodiment will be described. Here, Fig. 16A is a diagram showing the cross-sectional structure of the dresser according to the seventh embodiment and the method of use thereof. Fig. 17B is an enlarged view showing the cross-sectional structure of the dresser in detail.

The difference between the dresser 1200 according to the seventh embodiment and the dresser 1100 of the sixth embodiment lies in its layer structure. Referring to Fig. 16B, the dresser 1200 is a rod-shaped member in which two or more dressing members including the first dressing member 1221 and the second dressing member 1223 are provided so as to be continuous. For example, the first dressing member 1221, the second dressing member 1223, and the intermediate dressing member 1222 are provided to be continuous. The dressing members 1221 to 1223 are provided with dress surfaces 1221A to 1223A which are in contact with the object to be dressed, respectively. The dress surfaces 1221A to 1223A are formed to be continuous to form a contact surface 1200A.

Here, the 1st dressing member 1221 is located in the one outermost part 1226 in the arrangement | positioning of the dressing member provided so that the 2nd dressing member 1223 is located in the outermost 1227. Each particle size of a dressing member is comprised so that it may become small from the 1st dressing member 1221 located in outermost one layer 1226 toward the 2nd dressing member 1223 located in the outermost other layer 1227. For example, the sizes of the abrasive grains of the first dressing member 1221, the intermediate dressing member 1222, and the second dressing member 1223 are # 400, # 500, and # 600, respectively.

Next, with reference to Fig. 16A, the use method and advantages of the dresser 1200 will be described.

When dressing the abrasive grain 1020 of the abrasive grain wheel 1000, first, the dresser 1200 is fixed by a fixing jig (not shown) so as to expose the dress surfaces 1221A to 1223A. Next, as in the sixth embodiment, as shown in Fig. 16B, the contact surface 1200A is disposed such that the dress surface 1221A to 1223A of the dresser 1200 and the array of the abrasive layers 1021 to 1023 of the abrasive portion 1020 face each other. In close contact. In this manner, the abrasive grains 1021 to 1023 of the abrasive grains 1200 having the arrangement of the "small-mill" particle size dressing the abrasive grains 1020 without changing the dressers according to the three abrasive grain layers. can do.

Subsequently, the operation and effects of the abrasive wheel and the dresser according to the present embodiment will be described.

For example, in the first abrasive wheel 100, as shown in Fig. 5, the abrasive part 120 includes two or more abrasive layers 121, 124, 122, 125, and 123 having different particle sizes on the circumferential surface of the wheel part 110. It is formed by sequentially forming the first rotation axis A1 direction. Here, two or more abrasive layers 121, 124, 122, 125, and 123 are formed on the same circumferential surface of the same wheel part 110, so that the wheel part 110 as a body can be thickened as compared with the case where the abrasive part is made of one layer. Since the first abrasive wheel 100 becomes difficult to bend, it can withstand the impact received from the plate P during grinding. In addition, in the grinding process using the abrasive grain layer of one layer, when the feed speed of the plate P is made high speed, since there is no rigidity, since it becomes a state which rubs the upper surface, and causes tipping, it is a linear shape (feed trace) ) Remains, but the grinding using the first abrasive wheel 100 can be carried out without leaving a straight line. Therefore, by grinding the plate P while the first abrasive wheel 100 is rotated, chamfering grinding or angular corners of the cross section of the plate P by two or more abrasive layers 121, 124, 122, 125, and 123 having different particle sizes. In the case of negative grinding, the accuracy and efficiency of grinding can be improved.

In addition, since the wheel portion 990 is formed by joining two or more wheel layers 991, 992, and 993 as shown in FIG. 11, the wheel portion 990 is more difficult to bend as compared with the case where the wheel layer is one layer (for example, only the wheel layer 991). Lose. As a result, only by joining two or more wheel layers 991, 992, and 993, a first abrasive wheel 970 which is harder to bend than a wheel of an abrasive grain having a wheel portion of which the wheel layer is formed of one layer can be easily obtained. As a result, when grinding the plate material P while the first abrasive grain rotating wheel 970 is rotated, the wheel portion 990 also becomes difficult to bend in addition to the abrasive grain portion 120, so that the accuracy and efficiency of grinding can be further improved.

For example, each particle size of the abrasive grain layers 121, 124, 122, 125, and 123 included in the abrasive grain portion 120 is one of the outermost layers in the arrangement in the first rotation axis A1 direction as shown in FIG. 5 (b). Smaller as the first abrasive layer 121 located at the layer 126 of the second abrasive layer 122 and smaller toward the second abrasive layer 122 from the third abrasive layer 123 located at the other layer 127 of the outermost layer. Getting lost. Therefore, when the plate P is ground while the first abrasive wheel 100 is rotated, as shown in FIG. 4, the first abrasive layer 121 is directed from the first abrasive layer 121 to the third abrasive layer 123 along the direction of the first rotation axis A1 of the wheel part 110. After moving plate P in the direction (that is, the direction of the white arrow shown in FIG. 4), the plate in the direction from the third abrasive layer 123 toward the first abrasive layer 121 (that is, the direction opposite to the white arrow shown in FIG. 4). By grinding while moving P, grinding can be carried out while reciprocating a board | plate material. As a result, since the chamfer grinding process of the cross section of a board | plate material can be performed twice only by reciprocating the board | substrate P once, the efficiency of grinding can be improved further.

For example, in the grinding apparatus according to the fifth embodiment, as shown in Figs. 13 and 14, the chamfer grinding processing of the sheet material P is performed in the axial direction of the first rotary shaft A1 and from the first abrasive layer 1021 side. It is made by sending the plate P in one direction to the second abrasive layer 1023 side.

The abrasive grain portion 1020 is formed by sequentially forming three abrasive grain layers 1021, 1022, and 1023 having different particle sizes in the first rotation axis A1 direction. Here, the first abrasive layer 1021 is located in one layer 1026 of the outermost layer in the arrangement of the first rotary shaft A1. The second abrasive layer 1023 is located at the other layer 1027 of the outermost layer. Each particle size of the abrasive grain layer which the abrasive grain part 1020 has is small as it goes from the 1st abrasive grain layer 1021 located in one layer 1026 of an outermost layer toward the 2nd abrasive grain layer 1023 located in the other layer 1027 of an outermost layer. Lose.

As a result, the grinding sites polished by the second abrasive layer 1023 having a small particle size fall away from the abrasive wheel 1000 without again contacting the abrasive layer having the large abrasive grains, thereby leaving a deep straight grinding trace on the surface. Plate P is ground without grinding. Therefore, since the crack of the board | plate material P by grinding traces is prevented and the yield of the board | plate material to be polished improves, the efficiency of grinding can be improved. In addition, since the surface roughness of the polished sheet material is reduced, the accuracy of grinding can be improved.

As shown in Fig. 5B, the first abrasive layer 121 of the abrasive grain portion 120 has a first slope surface 121F, and the third abrasive layer 123 has a second slope surface 123F. Therefore, when polishing the plate P by contacting the end surfaces P3, P4 of the plate P and the second abrasive layer 122 in the state where the first abrasive wheel 100 is rotated, as shown in Fig. 7, the first rotating shaft A1 of the wheel part 110 is shown. By moving the plate P along the direction, the chamfer grinding processing of the cross section of the plate P can be performed, and in the state where the movement from one end of the plate P to the other end is finished, the first abrasive wheel as shown in Fig. 8 is shown. When the plate P is polished by bringing 100 closer to the plate P side and bringing the angled corner portion of the plate P into contact with the first inclined surface 121F or the second inclined surface 123F, the plate P is moved along the first rotation axis A1 direction of the wheel 110. By moving toward the abrasive wheel 100, it is possible to grind the angled corner portion of the plate P.

In addition, since the abrasive grains of the abrasive grain layers 121, 124, 122, 125, and 123 included in the abrasive grains 120 are ultra abrasive grains, grinding using ultra abrasive grains can be performed, and thus the efficiency of grinding can be further increased. In addition, the shape retention of the abrasive grains 120 is improved, and the service life of the abrasive grains 120 can be extended.

For example, in the grinding apparatus 10, as shown in FIGS. 1-4, the 1st abrasive wheel 100, the 2nd abrasive wheel 200, and the rotary grinding tool 300 were rotated, respectively, and the 1st rotating shaft A1 and Each of the second rotating shafts A2 is approached and spaced apart. Here, in the reference axis X direction, the installation position of the first abrasive wheel 100, the second abrasive wheel 200, and the rotary grinding tool 300 is the installation position Q1 (see Fig. 2) of the first abrasive wheel; It is located between the installation position Q2 of the rotary wheel and the installation position Q3 of the rotary grinding tool. Accordingly, after the plate P is enclosed between the first abrasive wheel 100, the second abrasive wheel 200, and the rotary grinding tool 300, the plate P is supported while the first rotary shaft A1 side and the second plate are supported. The rotating shaft A2 side can be ground simultaneously. As a result, the efficiency of grinding in the case of performing the chamfer grinding processing of the cross section of the plate material P or the angular corner portion can be further improved.

For example, in the grinding apparatus according to the fourth embodiment, as shown in Fig. 12, in the state where the first abrasive wheel 100 and the second abrasive wheel 200 are rotated, the first rotary shaft A1 and the second rotary shaft A2 are rotated. Approach and space each of them. Accordingly, after the plate P is enclosed between the first abrasive wheel 100 and the second abrasive wheel 200 attached to each other in parallel with each other, the plate P is supported and the first rotary shaft A1 and the second rotary shaft are supported. The A2 side can be ground simultaneously. As a result, the efficiency of grinding in the case of performing the chamfer grinding processing of the cross section of the plate material P or the angular corner portion can be further improved.

In the dresser according to the sixth embodiment, as shown in Fig. 15, the dresser 1100 is provided such that at least three dressing members including the first dressing member 1121, the second dressing member 1122, and the third dressing member 1123 are continuous. It is a rod-shaped member. The dressing members 1121 to 1125 are provided with dress surfaces 1121A to 1125A in contact with the object to be dressed, respectively, and are formed such that the dress surfaces 1121A to 1125A are continuous. Each particle size of the dressing members 1121 to 1125 decreases toward the second dressing member 1122 from the first dressing member 1121 located at the outermost one 1126 and is located at the outermost 1127 of the third dressing member 1123. It is comprised so that it may become small as it goes to the 2nd dressing member 1122 from. In this way, dressing can be performed at once without replacing the dresser with respect to the abrasive grain layers 121 to 125 of the abrasive grain portion 120. For example, with respect to the abrasive layers 121 to 125 of the abrasive part 120 having a grain size arrangement of "small-mill-small", dressing can be performed at once without changing the dresser according to the five different abrasive layers. Can be.

In the dresser according to the seventh embodiment, as shown in Fig. 16, the dresser 1200 is a rod-shaped member which is provided so that two or more dressing members including the first dressing member 1221 and the second dressing member 1223 are continuous. . The dressing members 1221 to 1223 each have dress surfaces 1221A to 1223A in contact with the object to be dressed, and are formed such that the dress surfaces 1221A to 1223A are continuous. The particle sizes of the dressing members 1221 to 1223 are configured to decrease from the first dressing member 1121 positioned at the outermost one 1226 toward the second dressing member 1223 positioned at the outermost other 1227. In this way, the abrasive grains 1021 to 1223 of the abrasive grains 1000 having an "small-mill" arrangement of particle sizes also have the abrasive grains 1020 once without changing the dressers according to three different abrasive grain layers. You can dress on.

As mentioned above, although the invention made by this inventor was demonstrated concretely based on the Example, this invention is not limited to the said Example, A various deformation | transformation is possible for it. For example, a plurality of abrasive wheels having the same structure including the wheel layer and the abrasive layer formed on the wheel layer may be prepared, and the abrasive wheels may be configured by attaching the wheel layers and the abrasive layer to each other in sequence.

According to the present invention, there is provided an abrasive wheel, a grinding device and a dresser capable of increasing the accuracy and efficiency of grinding in the case of chamfering grinding of a cross section of a plate.

Claims (11)

A wheel part rotated and an abrasive grain part formed in the circumferential surface of the wheel part, and the chamfering grinding processing of the end surface of a board | plate material As an abrasive wheel, The abrasive grain is an abrasive grain wheel, characterized in that two or more grain layers having different particle sizes are formed sequentially on the circumferential surface of the wheel portion in the direction of the rotation axis. The method of claim 1, The wheel part is an abrasive wheel, characterized in that two or more wheel layers (wheel) are sequentially joined in the direction of the rotation axis of the wheel portion. The method according to claim 1 or 2, The abrasive grain portion is formed by sequentially forming three or more abrasive grain layers including a first abrasive grain layer, a second abrasive grain layer, and a third abrasive grain layer in the direction of the rotation axis of the wheel portion, The first abrasive grain layer is located in one of the outermost layers in the axial arrangement. The third abrasive grain layer is located in the other layer of the outermost layer, Each particle size of the abrasive grain layer provided with the said abrasive grain part becomes small as it goes toward the said 2nd abrasive grain layer from the said 1st abrasive grain layer located in one layer of the said outermost layer, and the other of the said outermost layer It becomes smaller from the third abrasive layer located in the layer toward the second abrasive layer An abrasive wheel characterized by. The method according to claim 1 or 2, The abrasive grains are formed by sequentially forming two or more abrasive grain layers including a first abrasive grain layer and a second abrasive grain layer in a direction of the rotation axis of the wheel portion, The said 1st abrasive grain layer is located in one layer of the outermost layer in the said axial arrangement, The second abrasive grain layer is located in the other layer of the outermost layer, Each particle size of the abrasive grains provided by the abrasive grains decreases toward the second abrasive grain layer from the first abrasive grain layer. An abrasive wheel characterized by. The method of claim 3, The first abrasive layer includes a first inclined surface that is inclined so that an outer diameter becomes large toward the second abrasive layer side. The third abrasive layer has a second inclined surface that is inclined so that an outer diameter increases toward the second abrasive layer side. An abrasive wheel characterized by. The method according to any one of claims 1 to 5, An abrasive grain provided in each of the abrasive grain layers included in the abrasive grain portion is an ultra abrasive grain. First and second rotary shafts, which approach and space apart, are parallel with respect to the reference axis and rotate in opposite rotational directions and are parallel to each other, The first abrasive wheel of any one of claims 1 to 6 attached to the first rotary shaft, The second abrasive wheel of any one of claims 1 to 6 attached to the second rotary shaft, An abrasive grain is formed and the rotary grinding tool rotated by being attached to the second rotary shaft. Equipped, In the reference axis direction, the installation position of the first abrasive wheel is between the installation position of the second abrasive wheel and the installation position of the rotary grinding tool. Grinding device characterized in that. The first and second rotation shafts which rotate in the opposite rotational directions and are parallel to each other as well as approach and space apart, The first abrasive wheel of any one of claims 1 to 6 attached to the first rotary shaft, The second abrasive wheel of any one of claims 1 to 6 attached to the second rotary shaft Equipped, The first abrasive wheel and the second abrasive wheel is attached to a position facing each other. Grinding device characterized in that. As a dresser for dressing the abrasive part of the abrasive wheel, A dresser characterized in that two or more dressing members having different particle sizes are arranged to be continuous so that two or more dressing surfaces having different particle sizes are continuous. The method of claim 9, Three or more dressing members including the first dressing member, the second dressing member, and the third dressing member are provided so as to be continuous, The first dressing member is located at one of the outermost portions in the arrangement of the dressing members provided to be continuous, The third dressing member is located on the other side of the outermost portion, The particle size of each of the dressing members decreases toward the second dressing member from the first dressing member and decreases toward the second dressing member from the third dressing member. Dresser characterized by. The method of claim 9, Two or more dressing members including the first dressing member and the second dressing member are provided so as to be continuous, The first dressing member is located at one of the outermost portions in the arrangement of the dressing members provided to be continuous, The second dressing member is located on the other side of the outermost portion, The particle size of each of the dressing members decreases toward the second dressing member from the first dressing member. Dresser characterized by.

Images