TWI577502B - The method of dressing the elastic stone - Google Patents

Description

Elastic meteorite trimming method

The present invention relates to a method of dressing an elastic vermiculite.

A glass plate for an FPD (Flat Panel Display) used in a liquid crystal display or a plasma display is formed into a plate shape by a glass plate, and then cut into a glass plate having a specific rectangular size by a cutting device. Thereafter, the glass plate is chamfered by the chamfering of the chamfering device disclosed in Patent Document 1 or the like, and the edge portion is subjected to chamfering.

Further, the chamfering device described in Patent Document 2 includes a metal cement vermiculite (grinding vermiculite) having a V-shaped groove for grinding on the outer peripheral surface, and an elastic vermiculite (grinding vermiculite) which is flat as a peripheral surface of the polishing surface. According to the chamfering device of Patent Document 2, the edge portion of the plate-like body is ground by the V-shaped groove of the metal cement vermiculite to form a chamfered surface at the edge portion, and thereafter, the flat outer surface by the elastic vermiculite Grinding the chamfered surface described above. In Patent Document 2, as the binder (bonding agent) of the above-mentioned elastic vermiculite, butyl rubber, polyfluorene oxide, polyurethane or natural rubber is exemplified; and as the vermiculite, alumina (Al ₂ O ₃ ) is exemplified. ), tantalum carbide (SiC), pumice or garnet.

Prior technical literature Patent literature

Patent Document 1: Japanese Patent Laid-Open Publication No. 2002-160147

Patent Document 2: Japanese Patent Laid-Open Publication No. 2001-9689

The elastic vermiculite disclosed in Patent Document 2 abuts on the chamfered surface of the plate-like body as the flat outer surface of the polishing surface, which is worn out as the processing time elapses. Thereby, an annular groove formed by transferring the shape of the edge portion of the plate-like body is formed on the outer peripheral surface of the flat shape. When the annular groove is deepened, the main surface of the plate-shaped body is polished except for the edge portion of the plate-like body. Therefore, when the annular groove reaches a certain depth, the peripheral surface of the elastic vermiculite must be ground. It is restored to its original flat shape, that is, it is necessary to trim the outer surface of the elastic vermiculite.

As a method of dressing the above-mentioned elastic vermiculite, it is considered that the outer peripheral surface is ground to be flattened by pressing the cutting tool such as a turning tool to the outer peripheral surface of the elastic vermiculite while rotating the elastic vermiculite around the central axis thereof.

However, if a turning tool is used as the dressing tool, the peripheral surface of the vermiculite is burnt or expanded due to the high-temperature processing heat generated by the contact portion of the peripheral surface of the turning tool and the elastic vermiculite. Further, since the binder of the elastic vermiculite is an elastic body, it is difficult to grind the outer peripheral surface into a flat shape by a turning tool which applies a high pressure for grinding. Therefore, there is a problem that the grinding accuracy of the outer peripheral surface is poor for trimming with a turning tool.

In order to solve the problems as described above, it is considered to use a disc-shaped or cylindrical metal-bonding agent vermiculite as a dressing tool. In other words, the metal bond vermiculite is rotated in contact with the peripheral surface of the elastic vermiculite, and the processing heat of the in-line contact portion is reduced to grind the outer peripheral surface of the elastic vermiculite.

However, if a metal binder vermiculite is used as a dressing tool, the metal cement vermiculite is blocked by the grinding debris at an early stage, and therefore there is a problem that the trimming efficiency is lowered.

In order to solve this problem, a wet dressing method in which the above-mentioned line contact portion is sprayed with the cutting water to wash away the grinding debris and the peripheral surface of the elastic vermiculite is ground is used. However, the wet trimming method has a problem that a water treatment apparatus that requires cutting water is required because the cutting water after use contains grinding debris.

The present invention has been made in view of the circumstances as described above, and an object thereof is to provide a The dressing method of trimming the outer peripheral surface of the elastic vermiculite into a flat elastic vermiculite without using the wet trimming method, that is, using the dry trimming method.

In order to achieve the above object, the present invention provides a method for dressing an elastic vermiculite which is to be trimmed as an elastic vermiculite having a flat outer surface as a polishing surface, and the elastic vermiculite having an annular groove formed on the outer peripheral surface thereof The plated vermiculite rotates around each of the central axes, and relatively presses the outer peripheral surface of the plated vermiculite and the outer peripheral surface of the elastic vermiculite, and the outer peripheral surface of the elastic vermiculite is ground by the electroplating vermiculite. It is trimmed into a flat shape.

According to the present invention, in the dry dressing method, the plated vermiculite which is trimmed without clogging is used, and the outer surface of the elastic vermiculite as the polishing surface is trimmed. In other words, the elastic vermiculite and the plated vermiculite which are required to be trimmed on the outer peripheral surface of the flat surface are rotated around the respective central axes, and the outer peripheral surface of the vermiculite and the outer peripheral surface of the elastic vermiculite are relatively pressed. Thereby, the outer surface of the elastic vermiculite is gradually worn and pulverized by the outer surface of the plated vermiculite, and the outer surface of the elastic vermiculite is subjected to grinding processing to be trimmed into a flat shape.

The term "electroplated vermiculite" refers to a vermiculite in which the abrasive grains of the diamond or CBN (Cubic Boron Nitride) are held on the surface of the base member while the abrasive grains are mechanically fixed to the base member. The electroplated vermiculite has the characteristics that the amount of abrasive grains is larger than that of the metal binder vermiculite or the resin binder vermiculite and the sharpness is sharper than the meteorites. According to this feature, even if the elastic vermiculite having the annular groove formed on the outer peripheral surface, the plated vermiculite can be trimmed into a flat shape by the dry trimming method without clogging. Moreover, the dressing method using the plated vermiculite can be provided with a small dust collector that collects the dust which is scattered during the suction trimming process in the trimming portion, and therefore, the large-scale water treatment required in the wet dressing method is not required. device.

Moreover, in order to achieve the above object, the present invention provides a method for dressing an elastic vermiculite which is to press the outer peripheral surface of the polishing surface against the edge of the plate-like body and to make it When the center axis is rotated about the center and the elastic vermiculite is polished and processed at the edge portion, the annular groove formed by transferring the shape of the edge portion of the plate-like body to the outer peripheral surface of the elastic vermicite is specified. The depth is such that the elastic vermiculite and the plated vermiculite rotate around each of the central axes, and the outer peripheral surface of the plated vermiculite and the outer peripheral surface of the elastic vermiculite are relatively pressed, whereby the electroplated vermiculite pair The outer peripheral surface of the elastic vermiculite is subjected to a grinding process to be trimmed into a flat shape.

The present invention is a specialization method for trimming an elastic vermiculite at the edge of a plate-like body. In other words, the outer peripheral surface of the elastic vermiculite which is flat on the outer peripheral surface of the polishing surface is pressed against the edge portion of the plate-like body, and the elastic vermiculite is rotated about the central axis thereof to polish the edge portion. As the processing time elapses, the outer peripheral surface of the flat surface of the elastic vermiculite is gradually worn, and an annular groove formed by transferring the shape of the edge portion of the plate-like body is formed on the outer peripheral surface. Then, when the annular groove reaches a certain depth, the outer peripheral surface of the elastic vermiculite is trimmed by the dressing method of the present invention.

Preferably, in one aspect of the invention, the direction of rotation of the elastic vermiculite is the same direction as the direction of rotation of the plated vermiculite, and the outer peripheral surface of the elastic vermiculite is opposite to the contact portion of the outer peripheral surface of the plated vermiculite The peripheral speed is 6.5~13.0m/s.

According to an aspect of the present invention, since the rotational directions of the elastic vermiculite and the plated vermiculite are each set to the same direction, and the relative circumferential speed of the contact portion between the outer peripheral surface of the elastic vermiculite and the outer surface of the plated vermiculite is set to 6.5~ With 13.0m/s, the minimum finishing time can be obtained with the minimum finishing time.

That is, since the elastic vermiculite is an elastic body, when the peripheral speed is set to a high speed of more than 13.0 m/s, the outer peripheral surface of the elastic body is swollen by the centrifugal force generated in the elastic vermiculite. Therefore, it is impossible to accurately trim the outer surface of the elastic vermiculite. Further, when the peripheral speed exceeds 13.0 m/s, there is also a problem that since the dry type is dry, the processing heat becomes high temperature and the peripheral surface of the elastic vermiculite is burnt. Thus, the above-mentioned peripheral speed has a lower speed. Then the dressing accuracy tends to increase. However, if the above peripheral speed is excessively set to a low speed, the dressing time becomes too long, which adversely affects the original work (grinding process) of the elastic vermiculite. Therefore, the trimming time for obtaining the necessary minimum trimming precision was verified by the actual machine, and as a result, it was confirmed that the lower limit of the peripheral speed was preferably set to 6.5 m/s. Thus, by setting the peripheral speed to 6.5 to 13.0 m/s, it is possible to obtain the minimum necessary trimming precision with the shortest trimming time. Further, the elastic vermiculite and the plated vermiculite are formed into a disk shape, a column shape, or a cylindrical shape.

One aspect of the present invention is preferably that the adhesive of the above-mentioned elastic vermiculite is butyl rubber, natural rubber or resin, and the abrasive particles of the above-mentioned elastic vermiculite are diamond, cubic boron nitride (CBN), and alumina (Al ₂ O). ₃ ), lanthanum carbide (SiC), pumice or garnet.

According to an aspect of the present invention, a vermiculite using a butyl rubber or a natural rubber as a binder or a resin binder vermiculite using a resin can be exemplified as an elastic vermiculite.

According to the present invention, since the plated vermiculite is used as the dressing tool, the outer peripheral surface of the elastic vermiculite can be accurately flattened by the dry dressing method.

10‧‧‧Chamfering device

12‧‧‧ glass plate

12A~12D‧‧‧The edge of the glass plate

End face of 12E, 12E'‧‧‧ glass plates

12F‧‧‧ the main face of the glass plate

The boundary surface between the end face of the 12G‧‧ ‧ glass plate and the main face

14‧‧ ‧ fixing

16‧‧‧Mobile devices

18, 20‧‧‧Metal binder meteorite

22, 24‧‧ ‧ motor

26, 28‧‧‧Flexible meteorite

26A‧‧‧Center axis

30, 32‧‧‧ motor

34, 36, 38, 40‧ ‧ nozzle

42‧‧‧ring groove

43‧‧‧ outer perimeter

44‧‧‧ring groove

46‧‧‧Electroplated vermiculite

46A‧‧‧Center axis

A‧‧‧ direction

B‧‧‧ directions

Fig. 1 is a plan view of a chamfering device equipped with an elastic vermiculite trimmed by the dressing method of the elastic vermiculite of the present invention.

Fig. 2 is an enlarged perspective view showing a main part of the chamfering device.

Fig. 3A is an explanatory view showing the arrangement of the edge of the grinding groove of the metal cement vermiculite and the edge of the glass plate.

Fig. 3B is an explanatory view of grinding the edge of the glass plate by a metal bond vermiculite.

Fig. 3C is an enlarged view of the edge portion of the glass plate which is ground to form a chamfered surface.

Figure 4 is a side view of a metal cement vermiculite.

Figure 5 is an overall perspective view of the new state or the modified elastic meteorite.

Fig. 6A shows the main state in which the plated vermiculite is in contact with the outer peripheral surface of the elastic vermiculite. Partially enlarged side view.

Fig. 6B is an enlarged side elevational view showing a state in which the outer peripheral surface of the elastic vermiculite is trimmed by electroplating vermiculite.

Fig. 6C is an enlarged side elevational view of the main part of the elastic vermiculite after the outer surface of the elastic vermiculite is trimmed by electroplating vermiculite.

Hereinafter, preferred embodiments of the elastic vermiculite dressing method of the present invention will be described in detail with reference to the accompanying drawings.

1 is a plan view of a chamfering device 10 having elastic vermiculite 26, 28 trimmed by the method of trimming an elastic vermiculite of the present invention. The chamfering device 10 performs chamfering by grinding the edge portions 12A to 12D of the glass plate (plate-like body) 12 for a liquid crystal display having a thickness of 0.7 mm or less by the metal bonding agent vermiculite 18 and 20, and A device for mirror processing is performed by grinding the chamfered surface of the chamfered process by the elastic vermiculite 26, 28.

Further, the plate-like body that can be applied to the chamfering device 10 is not limited to the glass plate 12 for a liquid crystal display. For example, it may be a glass plate for a plasma display, a glass plate for an LED (Light Emitting Diode) display, or other glass plates for FPD, or may be used for solar cells, lighting, building materials, or mirrors. Wait for the general glass plate. Moreover, even if it is a plate-shaped body made of metal or resin, it can be applied. The thickness of the plate-shaped body is not limited to 0.7 mm or less, and may be a thickness exceeding 0.7 mm.

The chamfering device 10 includes members such as a fixed plate 14 that adsorbs and holds a rectangular glass plate 12, and a moving device 16 that moves the fixed plate 14 in the direction of the arrow AB; a disc-shaped or cylindrical one-to-metal bonding agent The vermiculite 18, 20, etc. grind the edge portions 12A to 12D of the glass plate 12 to form a chamfered surface at the edge portion; the motors 22, 24, etc., rotate the metal cementites 18, 20 at a high speed; Or cylindrical elastic vermiculite 26, 28, etc., which grinds the chamfered surface for mirror processing; motors 30, 32, etc., which rotate the elastic vermiculite 26, 28 at a high speed; nozzles 34, 36, which are bonded to the metal Processing of agent vermiculite 18, 20 The portion sprays the coolant; and the nozzles 38, 40, which eject the coolant to the processed portions of the elastic vermiculite 26, 28.

The adhesive of the elastic vermiculite 26, 28 is a resin such as elastic butyl rubber, natural rubber or polyfluorene oxide, polyurethane, phenol, epoxy or polyimine, and elastic vermiculite 26, 28 The abrasive grains are diamond, cubic boron nitride (CBN), alumina (Al ₂ O ₃ ), tantalum carbide (SiC), pumice or garnet. The method of trimming the elastic vermiculite 26, 28 will be described below.

The chamfering device 10 is configured such that the main surface of the glass plate 12 is adsorbed and held on the fixed plate 14 in a state where the edge of the glass plate 12 having the two opposite main faces is exposed from the upper surface of the fixed plate 14. The adsorption surface of the surface is moved by the moving device 16 in the direction of the arrow A. During the above movement, the opposite edge portions 12A and 12B of the glass plate 12 are ground by the metal bond vermiculite 18, 20 which is rotated in the direction opposite to the direction of movement of the glass sheet 12. Corner. Then, the chamfered surface is polished by the elastic vermiculite 26, 28 which rotates in the direction opposite to the direction of movement of the glass sheet 12. Thereby, the edge portions 12A and 12B of the glass plate 12 are subjected to chamfering processing, and then mirror-finished.

Further, at the time of chamfering, the processed portion in contact with the metal bond vermiculite 18 and the edge portion 12A of the glass plate 12 sprays the coolant from the nozzle 34, and contacts the metal bond vermiculite 20 with the edge portion 12B of the glass plate 12. The processing unit ejects the coolant from the nozzle 36. Further, at the time of mirror surface processing, the processed portion that contacts the elastic vermiculite 26 and the edge portion 12A of the glass plate 12 ejects the cooling liquid from the nozzle 38, and the processed portion that contacts the elastic vermiculite 28 and the edge portion 12B of the glass plate 12 from the nozzle 40 Spray the coolant.

As a result, the processed portion is cooled by the coolant, and thus the occurrence of coking, defects, and the like in the edge portions 12A and 12B of the glass sheet 12 is reduced. Further, the amount of debris generated on the boundary surface between the two main faces of the glass sheet 12 and the end faces of the edge portions 12A and 12B is also reduced. Further, as the cooling liquid, deionized water, grinding oil, and a mixture thereof may be exemplified.

In the chamfering device 10, in order to face the glass plate 12, the opposite edge portions 12A, 12B At the same time, chamfering and mirror processing are performed, and the metal cement vermiculite 18 and the elastic vermiculite 26 are disposed opposite to the edge portion 12A, and the metal cement vermiculite 20 and the elastic vermiculite 28 are disposed opposite to the edge portion 12B. The elastic vermiculite 26 and 28 are disposed on the downstream side in the conveying direction of the glass sheet 12 with respect to the metal binder vermiculite 18 and 20.

In FIG. 1, the metal bond vermiculite 18 is rotated clockwise by the motor 22, and the metal cement meteorite 20 is rotated counterclockwise by the motor 24. Further, the elastic vermiculite 26 is rotated clockwise by the motor 30, and the elastic vermiculite 28 is rotated counterclockwise by the motor 32. The number of revolutions of the vermiculite 18, 20, 26, 28 is preferably set to 3000 rpm or more.

Further, in Fig. 1, a chamfering device 10 for processing the edge portions 12A, 12B by moving the metal bonding agent vermiculite 18, 20 and the elastic vermiculite 26, 28 while moving the glass sheet 12 in the direction of the arrow A is shown. However, it is not limited to this. For example, it may be a chamfering device that fixes the glass sheet 12 and moves the metal cementites 18, 20 and the elastic vermiculite 26, 28 along the edge portions 12A, 12B of the glass sheet 12. Further, a chamfering device for moving the metal cement garnets 18 and 20 and the elastic gangues 26 and 28 and the glass sheet 12 in the direction in which the glass sheets 12 are moved toward each other along the edge portions 12A and 12B of the glass sheet 12 may be used. Further, the other opposite edge portions 12C and 12D of the glass plate 12 may be formed by the metal bond vermiculite (not shown) disposed behind the metal bond gangues 18 and 20 of FIG. 1 and the elastic gangues 26 and 28. Processing with elastic vermiculite. Alternatively, the edge portions 12C, 12D may be processed in such a manner that the glass plate 12 is moved in the B direction by the fixing plate 14 to return to the original position, and then the glass plate 12 is made of glass by the fixing plate 14. After the vertical line in the direction of the main surface of the plate 12 is rotated by 90 degrees, the glass plate 12 is moved in the A direction by the fixing plate 14, and the interval is changed by the length of the edge portions 12A and 12B of the glass plate 12. The metal binders 18, 20 and the elastic vermiculite 26, 28 process the edges 12C, 12D.

2 is an enlarged perspective view of a main portion of the chamfering device 10, showing a metal cement gangue 18 and an elastic vermiculite 26.

As shown in FIG. 2, the metal binder vermiculite 18 and the elastic vermiculite 26 are disposed opposite to the end surface 12E of the glass sheet 12. Here, the end surface 12E means a surface that is orthogonal to the principal surface 12F of the glass sheet 12 and is a surface before processing. The portion including the boundary surface between the end surface 12E and the main surface 12F and the end surface 12E is referred to as a rim portion 12A to 12D, and the edge portions 12A to 12D are processed by the metal cement garnets 18 and 20 and the elastic vermiculite 26 and 28. Further, as described in Patent Document 1, the rotation axes of the metal binder garnets 18 and 20 and the elastic gangues 26 and 28 may be inclined at a specific angle with respect to the perpendicular line standing on the main surface 12F of the glass sheet 12.

The metal binders 18, 20 and the elastic vermiculite 26, 28 are simultaneously rotationally driven, and by the movement of the glass plate 12 of the moving device 16 of Fig. 1, the opposite edge portions 12A, 12B of the glass plate 12 are simultaneously made of metal. The binders 18, 20 and the elastic vermiculite 26, 28 are processed.

3A and 3B are enlarged cross-sectional views showing main parts of the outer peripheral surface of the metal cement ettrings 18 and 20. Further, since the metal binders ettringes 18 and 20 have the same configuration, the metal binder talc 18 will be described here, and the description of the metal binder strontium 20 will be omitted.

On the outer peripheral surface of the metal bond vermiculite 18, a plurality of annular grooves 42 as grinding grooves are formed in the horizontal direction (the direction orthogonal to the rotation axis indicated by the one-dot chain line in Fig. 4). The annular groove 42 is formed in a side view of the metal cement vermiculite 18 as shown in Fig. 4, and is provided in parallel in the vertical direction.

Further, the cross-sectional shape of the metal bond vermiculite 18 in the thickness direction of the annular groove 42 is not limited to the U shape as shown in FIGS. 3A and 3B, and may be V-shaped or concave. Further, the number of the annular grooves 42 may be one. However, in order to omit the replacement work of the metal cement whetstone 18, it is preferable to set the thickness of the metal cement gangue 18 at a specific interval as shown in FIG. Multiple roots. Since the plurality of annular grooves 42 are provided in the metal cement vermiculite 18, the life of the annular groove 42 in use has expired, and the metal bond agent vermiculite 18 is spaced by the annular groove 42 by a control device not shown. When the unit is lifted up and down in the up and down direction (the thickness direction of the metal bond gangue 18), the new one can be used without replacing the metal bond gangue 18 The annular groove 42 grinds the edge portion 12A of the glass sheet 12. Further, the shape of the annular groove 42 may be a shape having a single radius of curvature, a part of the grinding end face 12E, and grinding of the end face 12E' and the main face 12F which have been finished as shown in FIG. 3C. Portions of the boundary surface 12G have shapes of different radii of curvature.

As shown in Fig. 3A, the annular groove 42 of the metal cement vermiculite 18 in the horizontal direction faces the edge portion 12A of the glass sheet 12, and from this state, the metal cement vermiculum 18 moves in the horizontal direction toward the edge portion 12A. Then, when the annular groove 42 of the metal cement vermiculite 18 abuts against the edge portion 12A, as shown in FIG. 3B, the metal cement vermiculum 18 moves toward the edge portion 12A in an amount corresponding to the amount of grinding. Thereby, as shown in FIG. 3C, the edge portion 12A is ground by the annular groove 42 and a chamfered surface is formed at the edge portion 12A. Further, as shown by a broken line B in FIG. 3A, the metal bond vermiculite 18 is moved toward the edge portion 12A so that the center portion in the thickness direction of the glass sheet 12 of the end surface 12E abuts against the deepest portion of the annular groove 42.

Next, the elastic vermiculite 26, 28 will be described. Further, since the elastic vermiculite 26 and the elastic vermiculite 28 are the same, the elastic vermiculite 26 will be described here, and the description of the elastic vermiculite 28 will be omitted. Also, the description associated with the elastic vermiculite 28 is omitted.

Fig. 5 is an overall perspective view showing the state of the new product or the modified elastic vermiculite 26. The elastic vermiculite 26 is a vermiculite which is formed in a disk shape, a column shape, or a cylindrical shape and has a flat outer shape as the outer surface of the polishing surface.

The elastic vermiculite 26 is a vermiculite which is obtained by holding the abrasive grains by a binder of a thermosetting resin. Examples of the above-mentioned binder include butyl rubber, natural rubber, or a resin such as polyfluorene oxide, polyurethane, phenol, epoxy or polyimine. Further, examples of the abrasive grains include diamond, cubic boron nitride (CBN), alumina (Al ₂ O ₃ ), tantalum carbide (SiC), pumice or garnet. Further, the particle size of the abrasive grains of the elastic vermiculite 26 is preferably 200 to 1500 (JIS R6001: 1998) when the abrasive grains are diamond.

The flat outer peripheral surface of the elastic vermiculite 26 abutting on the end surface 12E' of the edge portion 12A of the glass sheet 12 (refer to FIG. 3C) is worn out as the processing time elapses. Thus, the bomb of Figure 2 Similarly to the flat outer peripheral surface 43, the vermiculite 26 forms a concave groove 44 which is formed by the shape of the edge portion 12A of the glass sheet 12. When the annular groove 44 is deepened, the main surface 12F of the glass plate 12 is also polished except for the edge portion 12A of the glass plate 12. Therefore, when the annular groove 44 reaches a certain depth, the outer peripheral surface 43 of the elastic vermiculite 26 is applied. Grinding is performed to restore the original flat shape. That is, the outer peripheral surface 43 of the elastic vermiculite 26 is trimmed. In the present specification, the flat shape means that the shape of the surface is flat when viewed from the direction perpendicular to the central axis 26A with respect to the elastic vermiculite 26 as shown in FIG. 6C.

Next, the method of trimming the elastic vermiculite 26 will be described.

The dressing method of the outer peripheral surface 43 of the elastic vermiculite 26 is a plated, cylindrical or cylindrical electroplated vermiculite 46 shown in Figs. 6A and 6B as a dressing tool. Fig. 6A is an enlarged side elevational view showing a state in which the flat outer peripheral surface of the plated vermiculite 46 abuts against the outer peripheral surface 43 of the elastic vermiculite 26, and Fig. 6B shows the outer peripheral surface 43 of the elastic vermiculite 26 trimmed by the plated vermiculite 46. The main portion of the state is an enlarged side view, and FIG. 6C is an enlarged side view of a main portion of the elastic vermiculite 26 in which the outer peripheral surface 43 of the elastic vermiculite 26 is trimmed into a flat shape by the plating of the vermiculite 46.

That is, the dressing method of the elastic vermiculite 26 of the embodiment is used in the dry dressing method to trim the outer peripheral surface 43 of the elastic vermiculite 26 by the plated vermiculite 46 which is trimmed without clogging.

Specifically, as shown in FIG. 6A, the elastic vermiculite 26 and the plated vermiculite 46 which are formed to have the annular groove 44 and which are to be trimmed are rotated around the respective central axes 26A and 46A, and are relatively pressed as shown in FIG. 6B. The flat outer surface of the plated vermiculite 46 and the outer peripheral surface 43 of the elastic vermiculite 26 are formed. Thereby, the outer peripheral surface 43 of the elastic vermiculite 26 is gradually worn and pulverized by the plated vermiculite 46, and as shown in FIG. 6C, the outer peripheral surface 43 is subjected to grinding processing to be trimmed into a flat shape.

Further, of course, the elastic vermiculite 26 is set in parallel with the plated vermiculite 46-series central axes 26A and 46A.

The so-called electroplated vermiculite 46 refers to a metal base made of a disc, a cylinder or a cylinder. On the outer circumference of the body, the abrasive grains of diamond or CBN (Cubic Boron Nitride) are held on the surface of the base member (not shown) of the plated vermiculite 46, and nickel is plated to mechanically fix the abrasive grains. A vermiculite made of base members. The electroplated vermiculite 46 has the characteristics that the amount of abrasive grains is larger than that of the metal binder vermiculite or the resin binder vermiculite and the sharpness is sharper than the vermiculite.

According to the feature of the above-described electroplated vermiculite 46, even if the elastic vermiculite 26 having the annular groove 44 formed on the outer peripheral surface 43 can be trimmed into a flat shape by the dry trimming method without clogging.

Moreover, the dressing method using the plated vermiculite 46 is only required to provide a small dust collector for collecting dust in the trimming portion during the suction trimming process, and therefore, the large-scale water required for the wet dressing method is not required. Processing equipment.

Further, it is preferable that the circumferential speed of the contact portion between the outer peripheral surface 43 of the elastic vermiculite 26 and the outer peripheral surface of the plated vermiculite 46 is set to 6.5 to 13.0 m/s.

According to the dressing method of the embodiment, the rotation directions of the elastic vermiculite 26 and the plated vermiculite 46 are set to the same direction as shown in Figs. 6A and 6B, and the outer peripheral surface 43 of the elastic vermiculite 26 is in contact with the outer peripheral surface of the plated vermiculite 46. The relative circumferential speed in the part is set to 6.5 to 13.0 m/s, so that the minimum finishing time can be obtained with the minimum trimming time.

That is, since the elastic vermiculite 26 is an elastic body, when the peripheral speed is set to a high speed exceeding 13.0 m/s, the outer peripheral surface 43 of the elastic body is swollen by the centrifugal force generated in the elastic vermiculite 26. That is, the elastic vermiculite 26 is elastically deformed by the centrifugal force. Therefore, the outer peripheral surface 43 of the elastic vermiculite 26 cannot be trimmed to be flat (flat) with high precision. Further, when the peripheral speed exceeds 13.0 m/s, there is also a problem that since the dry type is high, the processing heat becomes high temperature and the outer peripheral surface 43 of the elastic vermiculite 26 is scorched. Therefore, as the circumferential speed is lower, the dressing accuracy tends to increase.

However, if the above peripheral speed is excessively set to a low speed, the dressing time becomes Long, and adversely affect the original work (grinding) of the elastic meteorite 26. Therefore, the trimming time for obtaining the necessary minimum trimming precision was verified by the actual machine, and as a result, it was confirmed that the lower limit of the peripheral speed was preferably set to 6.5 m/s. Thus, by setting the peripheral speed to 6.5 to 13.0 m/s, it is possible to obtain the minimum necessary trimming precision with the shortest trimming time.

The present invention has been described in detail with reference to the specific embodiments thereof. It is understood that various modifications and changes can be made without departing from the scope and spirit of the invention.

The present application is based on Japanese Patent Application No. 2012-224921, filed on Jan.

26‧‧‧Flexible meteorite

26A‧‧‧Center axis

43‧‧‧ outer perimeter

44‧‧‧ring groove

46‧‧‧Electroplated vermiculite

46A‧‧‧Center axis

Claims (7)

A method for dressing an elastic vermiculite which is to be trimmed as an elastic vermiculite having a flat surface outside the polishing surface, wherein the elastic vermiculite binder is a butyl rubber, a natural rubber or a resin, and the outer peripheral surface is formed with a ring shape. The above-mentioned elastic vermiculite of the groove is rotated about the center axis of each of the vermiculite having a larger amount of abrasive grains than the above-mentioned elastic vermiculite, and the outer surface of the vermiculite which is larger than the above-mentioned elastic vermiculite is relatively pressed and the above-mentioned elasticity is relatively pressed. The outer peripheral surface of the flattened vermiculite is subjected to grinding processing on the outer peripheral surface of the elastic vermiculite to be flattened. An elastic vermiculite trimming method for trimming an elastic vermiculite which is a peripheral surface of a polishing surface which is pressed against an edge portion of a plate-like body and which is rotated about a central axis thereof to polish the edge portion. The elastic vermiculite binder is a butyl rubber, a natural rubber or a resin, and when the annular groove formed by transferring the shape of the edge portion of the plate-like body to the outer peripheral surface of the elastic vermiculite reaches a specific depth, The elastic vermiculite and the vermiculite having a larger amount of the abrasive grains than the elastic vermiculite are rotated around the central axis of each of the elastic vermiculite, and the abrasive grains are protruded from the outer surface of the vermiculite larger than the elastic vermiculite and the flat surface of the elastic vermiculite The outer peripheral surface of the elastic vermiculite is subjected to a grinding process to be trimmed into a flat shape. The method for modifying an elastic vermiculite according to claim 1, wherein the outer peripheral surface of the flat portion of the vermiculite having a larger amount of abrasive grains than the elastic vermiculite is relatively pressed and the elastic 砥 The above peripheral surface of the flat stone. According to the method of dressing the elastic vermiculite of claim 2, the outer peripheral surface of the flat outer surface of the vermiculite which is larger than the elastic vermiculite and the flat outer peripheral surface of the elastic vermiculite are relatively pressed. The method for modifying an elastic vermiculite according to any one of claims 1 to 4, wherein a peripheral speed of the outer peripheral surface of the elastic vermiculite and a contact portion of the outer surface of the vermiculite having a larger amount of abrasive grains than the elastic vermiculite is 6.5~13.0m/s. The method for modifying an elastic vermiculite according to any one of claims 1 to 4, wherein the annular groove formed on the outer peripheral surface of the elastic vermiculite is shallowened by the trimming. The elastic vermiculite trimming method according to any one of claims 1 to 4, wherein the elastic vermiculite is restored to the original flat shape by the above trimming.