JP2007105817A - Resin grinding wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin grinding wheel which can deform a resin as many times as needed by heating or frictional heating, easily move abrasive grains in the grinding wheel, and easily shape a grinding wheel. <P>SOLUTION: The grinding wheel is composed by bonding a large number of the abrasive grains and a resin part made of a synthetic resin with each other. The resin part includes a thermoplastic resin so as to move positions of the abrasive grains by at least partially heating or applying external force to the resin part. The resin part is a polyphenylene sulfide (PPS), a polyester elastomer (TPC), a polyarylate (PAR), a polysulfone (PSU), a polyether sulfone (PESU), a polyether ether ketone (PEEK), a polyether imide (PEI), or a polyamideimide (PAI). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a grindstone mainly containing a thermoplastic resin, and more particularly to a grindstone containing a thermoplastic resin holding diamond abrasive grains or CBN (cubic boron nitride) abrasive grains and the structure of the grindstone.

  Conventionally, resin-bonded whetstones in which diamond abrasive grains or CBN (cubic boron nitride) abrasive grains are mixed with polyimide or phenol-based thermosetting resins as main ingredients, or diamond abrasive grains with vitrified as main ingredients And a vitrified grindstone in which CBN (cubic boron nitride) abrasive grains are mixed, and a metal bond grindstone in which diamond abrasive grains or CBN (cubic boron nitride) abrasive grains are mixed in a metal. These are generally referred to as superabrasive wheels. Here, what consists of resin and an abrasive grain is called a grindstone, and what consists of grindstone holding parts, such as a grindstone and a shank, a flange, and a segment, is called a grinding wheel.

  When truing these grindstones, as shown in FIG. 15, a grindstone dedicated to shaping called a truer 1 composed of a grinder grindstone 4 mainly composed of diamond abrasive grains and a turntable 5 is rotated at high speed. In general, a method of forming into a desired shape while cutting on the rotating grindstone 2 is common. Reference numeral 3 denotes an axis of the grindstone 2.

  Similarly, in dressing (shaping work), as shown in FIG. 16, for example, a method of dressing a block dresser 6 called a dresser while cutting into the rotating grindstone 2, or a single stone as shown in FIG. 17. A method of dressing while cutting the diamond 7 into the rotating grindstone 2 and a method of dressing while cutting into the grindstone 2 while rotating a cup-shaped dresser (not shown) in which many diamonds are embedded are common. is there.

An example of such a truing device is Patent Document 1. Moreover, as such a dressing apparatus, there is, for example, Patent Document 2.
JP-A-6-335861 Japanese Patent Publication No. 2002-66920

  However, since the conventional grindstone uses a resin that is not easily softened by heat, the position of the abrasive grains in the grindstone is determined at the time of manufacturing the grindstone, and the position of the abrasive grains cannot be moved.

  Moreover, the abrasive grains just before dropping off from the surface of the grindstone or the abrasive grains with reduced resin holding power could only be dropped during processing or forcibly dropped by dressing or truing.

  In addition, there was no method for dealing with a resin bond grindstone using a truer or a dresser under undue conditions and truing and dressing, even if the bond strength of the resin was damaged and the abrasive grain holding power decreased.

  The present invention eliminates the above-mentioned drawbacks.

  The grindstone of the present invention is a grindstone in which a large number of abrasive grains and a resin portion made of a synthetic resin are bonded to each other, and the resin portion includes a thermoplastic resin, and heating and external force are applied to at least a part of the resin portion. The position of the abrasive grains is moved by adding.

  The abrasive grains are scattered on at least the surface of the resin portion.

  The abrasive grains are composed of particles having a plurality of different particle size (particle size) distributions.

  The abrasive grain is characterized in that a film that reflects, scatters or absorbs light is formed on at least a part of the surface of the abrasive grain.

  The abrasive grains are composed of a plurality of different hardnesses.

  The resin part is composed of a plurality of layers.

  The resin part composed of a plurality of layers is characterized in that the composition of each layer is different.

  The resin portion includes at least one of a coloring component and a coloring component.

  The coloring component of the resin part includes a material that emits fluorescence when irradiated with ultraviolet rays.

  The content of the coloring component or coloring component in the resin part is 30% by weight or less based on the weight of the resin part.

  The resin portion is characterized in that a light absorber that absorbs 30% or more of the irradiated light is blended in an amount of 30% by weight or less based on the weight of the resin portion.

  The resin portion includes polyphenylene sulfide (PPS), polyester elastomer (TPC), polyarylate (PAR), polysulfone (PSU), polyethersulfone (PESU), polyetheretherketone (PEEK), polyetherimide (PEI), Or it is a polyamide imide (PAI), It is characterized by the above-mentioned.

  The grinding wheel of the present invention is a grindstone in which a large number of abrasive grains and a resin portion made of a synthetic resin are bonded to each other, and the resin portion includes a thermoplastic resin, and at least a part of the resin portion is heated. And a grindstone in which the position of the abrasive grains is moved by applying an external force, and a grindstone gripping portion having a shift prevention portion of the grindstone.

  The grinding wheel of the present invention is a grindstone in which a large number of abrasive grains and a resin portion made of a synthetic resin are bonded to each other, and the resin portion includes a thermoplastic resin, and at least a part of the resin portion is heated. And a grindstone whose position of the abrasive grains is moved by applying an external force, a grindstone gripping portion of the grindstone, and an adhesive for fixing the grindstone and the grindstone gripping portion.

  In the method for producing a grindstone of the present invention, an external force is applied to the resin portion in a state in which at least a part of the resin portion of the grindstone composed of a large number of abrasive grains and a resin portion containing a thermoplastic resin is heated to soften the resin portion. And the position of the abrasive grains is adjusted.

  In the method for producing a grindstone of the present invention, abrasive grains are mixed in a resin portion containing a thermoplastic resin, and the resulting mixture is heated to a plastic state, and the resin portion mixed with the abrasive grains is cooled to a desired shape. It is characterized in that an external force is applied to the resin part in a state where the resin part is softened by heating at least a part of the resin part molded into the desired shape, and the position of the abrasive grains is adjusted. To do.

  The method of heating at least a part of the resin part includes bringing the resin part or the workpiece to move relatively by bringing at least a part of the resin part into contact with the workpiece and moving the resin part or the workpiece relative to each other. Abrasion heat that is equal to or higher than a temperature at which the thermoplastic resin of the resin portion softens is generated between the workpiece and the workpiece.

  The method of heating at least a part of the resin part includes bringing at least a part of the resin part into contact with a truer, a dresser, or a workpiece heated above a temperature at which the thermoplastic resin of the resin part is softened. Features.

  The method of manufacturing a grinding wheel according to the present invention includes arranging a grindstone gripping portion of a grindstone in a molding die, mixing abrasive grains into a resin portion containing a plastic resin, and heating the resultant to a plastic state. The resin part material in a plastic state is cast, the resin part mixed with the abrasive grains is cooled and molded into a desired shape, and at least a part of the resin part molded into the desired shape is heated to An external force is applied to the resin portion while the resin portion is softened to adjust the position of the abrasive grains.

  The grinding wheel manufacturing method of the present invention is a plastic state in which a grinding wheel gripping portion having a grinding stone slip prevention portion is arranged in a molding die, abrasive grains are mixed in a resin portion containing a thermoplastic resin, and this is heated. The resin part material in a plastic state is poured into a molding die, the resin part mixed with the abrasive grains is cooled and molded into a desired shape, and at least one of the resin parts molded into the desired shape is formed. An external force is applied to the resin portion in a state where the portion is heated to soften the resin portion, and the position of the abrasive grains is adjusted.

  In the method for manufacturing a grinding wheel of the present invention, a grindstone gripping portion of a grindstone is disposed in a molding die, an adhesive is applied to at least a part of the grindstone gripping portion, and abrasive grains are mixed into a resin portion containing a thermoplastic resin. Then, it is made into a plastic state by heating, and a resin part material in a plastic state is poured into a molding die, the resin part mixed with the abrasive grains is cooled and molded into a desired shape, and the desired part is The position of the abrasive grains is adjusted by applying an external force to the resin part in a state where at least a part of the resin part molded into a shape is heated to soften the resin part.

  The method of manufacturing a grinding wheel according to the present invention is such that the resin part is softened by heating at least a part of a resin part of a grinding wheel composed of a resin part containing a thermoplastic resin and a grinding wheel gripping part. Abrasive grains are arranged on the surface of the steel sheet, an external force is applied, and the abrasive grains are pushed into the resin part so that the protruding height of the abrasive grains from the resin part becomes a desired height.

  The method of manufacturing a grinding wheel according to the present invention is such that a grinding wheel gripping portion having a grinding stone shift preventing portion is disposed in a molding die, and a resin portion containing a thermoplastic resin is heated to be in a plastic state and cast into the molding die. Then, the resin part is cooled and molded into a desired shape, and at least a part of the resin part is heated to soften the resin part, and abrasive particles are arranged on the surface of the resin part to external force. And the abrasive grains are pushed into the resin portion so that the protruding height of the abrasive grains from the resin portion becomes a desired height.

  According to the grindstone containing the thermoplastic resin of the present invention, since the thermoplastic resin is used as a bonding material for abrasive grains, the resin can be deformed many times simply by applying heating or rubbing heat. There is an advantage that it can be easily moved.

  In addition, by heating a tool to make the shape of the grindstone the desired shape, a tool such as a truer or dresser, and applying external force to the resin with this jig, the resin is deformed, and the abrasive grains in the grindstone There is an advantage that the grindstone can be easily moved and shaped.

  Moreover, there is an advantage that the shape and thickness of the grindstone can be precisely controlled by increasing the surface roughness and shape accuracy of the jig. The shaping mentioned here has the meanings of "making a shape" and "shaping the shape".

  In addition, the tool for making the shape of the grindstone a desired shape is heated, and external force is applied to the resin by this jig to deform the resin so that the apex of the abrasive grains is positioned on the outermost surface of the grindstone. The grain can be moved. As a result, unlike conventional whetstones where the abrasive grains are randomly arranged in the direction of the grindstone depth in the resin, the abrasive grains are uniformly arranged on the outermost surface of the grindstone, so only the resin on the grindstone surface is used in the dressing process. By removing it efficiently, there is an advantage that the entire surface of the grindstone can always be uniformly disposed.

  In addition, by adding abrasive grains between the grindstone and the jig and heating the resin and applying external force, the resin is deformed, not only the additional abrasive grains enter the gaps between the existing abrasive grains, but also from the new abrasive grains, Furthermore, since it is possible to divide between abrasive grains having a narrow interval, it is possible to obtain the outermost surface of the grindstone with a very high degree of concentration. As a result, it is possible to narrow the abrasive cutting edge interval, There is an advantage that the surface roughness can be improved.

  In addition, since a very high concentration level can be obtained only on the outermost surface of the grindstone, the holding power of the resin is high inside the normal concentration level, and if the grindstone is highly concentrated as in the past, the strength of the entire grindstone is reduced. There is a benefit of eliminating the problem of doing so.

  Also, grinding wheel wear, breakage, shape collapse, decrease in abrasive holding power, unevenness of abrasive cutting edge height protruding from resin surface, decrease in concentration due to falling off of abrasive grains, etc. However, there is an advantage that a resin or abrasive grains can be added to the grindstone, and heating and external force can be applied again to obtain a desired shape.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the embodiment of the present invention, as shown in FIG. 1, a large number of diamond grinds are formed from the other end opening of the mold 10 in a mold 10 comprising a cylindrical portion 8 and a lid 9 that closes one end opening. A mixture of kneaded grains 11 such as grains or CBN grains with a powder of thermoplastic resin 12 having a glass transition temperature (Tg) of 80 ° C. or higher is inserted, and the diameter of the mold 10 is the same as that of the mold 10. One end of a grindstone gripping part such as a shaft 13 is inserted, and the heater 14 provided on the mold 10 is set to 150 ° C. or higher while pressing the shaft 13 toward the mold 10 side, for example, 10 N / mm or more. After heating and making the thermoplastic resin 12 into a plastic state, it is formed into a desired shape such as a disk shape, cooled, and a grindstone 15 is formed as shown in FIG.

  In order to easily remove the grindstone 15 from the mold 10, it is preferable to apply a release agent to the inner surface of the mold 10 in advance.

  Further, since the surface roughness of the grindstone surface is determined by the surface roughness of the mold 10, it is preferable that the surface roughness of the mold 10 is mirror-polished.

  The thermoplastic resin 12 may be an amorphous or crystalline thermoplastic resin, and in particular, a highly crystalline thermoplastic resin such as polyphenylene sulfide (PPS), polyester elastomer (TPC), polyarylate (PAR), polysulfone. (PSU), polyethersulfone (PESU), polyetheretherketone (PEEK), polyetherimide (PEI), or polyamideimide (PAI) is preferred.

  Among the resins, polyphenylene sulfide (PPS) and polyether ether ketone (PEEK) are extremely high in heat resistance, and have excellent mechanical strength, rigidity, flame resistance, chemical resistance, electrical properties and dimensional characteristics. Is preferable.

  Moreover, it is preferable to mix the abrasive grains 11 having a particle diameter of 1 μm to 200 μm into the thermoplastic resin 12 with a concentration degree of 50 or more.

  In addition, since fluidity | liquidity will worsen when a concentration degree is raised, there exists a tendency for the heating temperature for making resin into a plastic state to become high. The heating temperature is the heater temperature, and the thermistor for measuring the temperature is far away from the thermoplastic resin. Therefore, the heater temperature for bringing the resin into a plastic state must be set by the grindstone molding device and the design. I must.

  Further, it is also effective to preheat the heater before setting the heater to a desired heating temperature, and a grindstone may be manufactured by setting two or more heating temperatures and heating times.

  Moreover, when using the powder of the abrasive grain 11 of 50 micrometers or less and the thermoplastic resin 12 of a particle size of 1 mm or less, it does not knead | mix with a kneading machine, but puts the abrasive grain 11 and the thermoplastic resin 12 into a container, and stirs. Just be fine. Since the abrasive grains 11 adhere to the surface of the thermoplastic resin 12 powder when the abrasive grain size is small, the abrasive grain dispersion is equivalent to the result of molding the kneaded pellets. In this patent, both methods of kneading and stirring will be referred to as kneading.

  Also, as shown in FIGS. 3 to 5, after kneading the abrasive grains 11 and the thermoplastic resin 12 into a plastic state by heating and pressing, gripping of the grindstones such as the shank 16, the flange 17, and the segment 18. Grinding wheels 19, 20, and 21 including the grindstone 15 and the grindstone gripping portion may be manufactured by being attached to the shaft, peripheral surface, or inner side of the portion by insert or outsert molding, and cooled.

  In the grinding wheel with a shaft in which the grindstone 15 is fixed to the shank-shaped grindstone gripping portion 16, for example, as shown in FIGS. 6 and 7, the shaft portion 22 and the shaft portion are provided at the tip of the grindstone gripping portion 16. If a slip prevention tool 25 comprising a head 23 provided at the tip of the head 22 and a groove 24 provided on the end surface of the head 23 is provided, the grindstone 15 rotates relative to the grindstone gripping portion 16 or comes off. Can be prevented.

  Further, in the grinding wheel 21 in which the grindstone 15 is fixed to the segment-shaped grindstone gripping portion 18, for example, as shown in FIG. 8, the slip prevention tool 27 including a recess 26 having a trapezoidal cross section on the peripheral surface of the grindstone gripping portion 18. If provided, it is possible to prevent the thermoplastic resin 12 that has entered the recess 26 from rotating or coming off with respect to the grindstone gripping portion 18.

  Moreover, in the grindstone gripping part without the slip prevention tool, the grindstone gripping part and the grindstone may be bonded using a commercially available one-component or two-component adhesive. In particular, instant adhesives are suitable.

  Further, when the abrasive grains 11 are kneaded with the thermoplastic resin 12, one or more kinds of abrasive grains or substances different from the hardness of the abrasive grains 11 are further kneaded with the thermoplastic resin 12. Alternatively, the grindstone 15 may be formed by heating and pressurizing to a plastic state and then cooling to a desired shape. Examples of the materials having different hardness include polycrystalline diamond, single crystal diamond, CBN, alumina, zirconia, synthetic rubber, thermosetting resin, glass filler, and aluminum nitride. Of course, even if the same material is used, the hardness varies depending on the manufacturing method.

  The abrasive grains kneaded with the thermoplastic resin 12 may be kneaded with two or more particle size (particle size) distributions. In particular, as shown in FIG. 9, if an abrasive grain 28 having a particle size of 1/2 or less of the grain size of the abrasive grain 11 kneaded with the thermoplastic resin 12 is kneaded, the gap between the abrasive grains 11 is increased. The abrasive grains 28 that enter can narrow the interval between the abrasive grains, increase the concentration of the abrasive grains, and increase the holding power of the abrasive grains with respect to the thermoplastic resin 11.

  Moreover, you may coat | cover the abrasive grains 11 and 28 knead | mixed with the said thermoplastic resin 12 with metals, such as nickel, copper, titanium, and chromium, or a nonmetal. Further, at least a part of the surface of the abrasive grains may be coated with a thin film that reflects, scatters or absorbs light such as Al.

  In addition, at least one of a coloring component and a coloring component is simultaneously added to the abrasive grains 11 and the thermoplastic resin 12 powder and kneaded, so that the type of abrasive grains, the type of resin, or the supply destination can be identified. You may do it.

  The coloring component may include a material that emits fluorescence when irradiated with ultraviolet rays.

  Further, the content of the coloring component or coloring component is preferably 30% by weight or less based on the weight of the resin.

  Further, the grindstone 15 and the thermoplastic resin 12 powder may be mixed with 30 wt% of an absorbent such as black carbon that easily absorbs a laser beam.

  As a result, if the peripheral surface of the grindstone 15 is irradiated with a laser beam, the thermoplastic resin 12 of the grindstone 15 can be easily heated, and the thermoplastic resin 12 on the surface of the grindstone 15 is brought into a plastic state so that the grindstone 15 Can be easily formed.

  In addition, in order to prevent the strength of the grindstone from being lowered, a light absorber that absorbs light of 30% or more with respect to the irradiated light is blended at 30% by weight or less with respect to the weight of the resin. preferable.

  The grindstone 15 may be composed of a plurality of resin layers, and the composition of the resin layers may be different.

  Further, if the resin layers of the grindstone 15 are kneaded with different colorants, the layers can be easily identified. Further, the effective abrasive layer can be easily identified, and can be used for a warning display for performing wheel replacement, dressing and truing.

  Further, when the height of each abrasive grain such as an abrasive grain protruding from the surface of the thermoplastic resin 12 becomes irregular after the grinding wheel 15 is used for grinding or the like, as shown in FIG. When the resin 12 is pressed while being heated with a jig 29 having a heater 14, for example, to form a plastic state, the abrasive grains 11 are buried in a state where their tips are in contact with the resin surface as shown in FIG. As shown in FIG. 12, if the surface of the grindstone is dressed with single stone diamond 30 or the like, the height of the cutting edge of the abrasive grains 11 can be made uniform, and the surface roughness of the grindstone is improved. Can do.

  Instead of heating using a heater, it may be heated by a laser beam, or may be heated by abrasion generated by bringing the resin and the jig in contact with each other and relatively moving them.

  The temperature at which the thermoplastic resin softens between the resin and the workpiece by bringing the resin and the workpiece into contact with each other and moving the resin or the workpiece relative to each other. The above-described abrasion heat may be generated, and an external force may be applied in a state where the resin portion is softened.

  In addition, an external force may be applied in a state where the resin is softened by bringing at least a part of the resin into contact with a truer, a dresser or a workpiece heated to a temperature at which the thermoplastic resin is softened or higher. Good.

  In the case of a small-diameter grindstone, the peripheral speed of the grindstone is slow, and since the circumference is short, the number of effective cutting edges is reduced, so that the load per abrasive grain becomes large and wear easily. 11 is refilled with its tip in contact with the resin surface, and the concentration of abrasive grains on the resin surface is increased, the load per abrasive grain can be reduced and wear can be prevented. , Grinding efficiency can be increased.

  Further, as shown in FIG. 13, the abrasive grains 11 are placed on a plate 31 having a heater, and the thermoplastic resin is heated by the heater while the surface of the plate 31 is pressed against the peripheral surface of the grindstone 15 to be in a plastic state. The abrasive grains 11 may be embedded. At this time, instead of providing a heater on the plate 31, the plate 31 is made of a hard transparent material such as sapphire or glass, and a laser beam is irradiated from the opposite side of the plate 31 with which the grindstone 15 is brought into contact. The abrasive grains 11 may be embedded with the thermoplastic resin in a plastic state. Further, instead of using the grindstone 15, a grindstone made only of a thermoplastic resin not containing abrasive grains may be used to embed the abrasive grains 11 in the grindstone. This structure is suitable for a surface grinder.

  Further, as shown in FIG. 14, while pressing the disc 32 with the heater against the thermoplastic resin 12 of the grindstone 15, the thermoplastic resin is heated by the heater to be in a plastic state, and the abrasive grains 11 are supplied to the thermoplastic resin. The abrasive grains 11 may be embedded in the resin. At this time, the material of the disk with a heater is made of ceramic, glass, quartz, metal, or a grindstone. Further, instead of using the grindstone 15, a grindstone made only of a thermoplastic resin not containing abrasive grains may be used to embed the abrasive grains 11 in the grindstone. This method is suitable for a grindstone used for a cylindrical grinder. It is also possible to rotate the grindstone and the heater-equipped disc while supplying the abrasive grains and generate a frictional heat by giving a difference in the number of rotations between them, thereby embedding the abrasive grains with the resin 12 in a plastic state.

  Table 1 shows (A) a grindstone made of PPS resin having abrasive grains, (B) a grindstone made of PEEK resin having abrasive grains, and (C) a grindstone made of PPS resin having colorants and abrasive grains. The processing resistance at the time of truing, dressing, and grinding when the temperature was changed from −20 ° C. to 350 ° C. while being pulled at 10 MP each was examined.

  As can be seen from Table 1, each grindstone has a processing resistance equivalent to that of a thermosetting resin up to 40 ° C. However, as the temperature increases to 40 ° C or higher, the processing resistance decreases, and the resin of each grindstone softens. If the temperature exceeds 300 ° C., it becomes completely plastic and melts, so that the shape of the grindstone cannot be maintained and the processing becomes impossible.

  Thus, since the thermoplastic resin 12 begins to soften below the Tg temperature, the heating temperature of the resin 12 when the abrasive grains are backfilled or embedded in the resin 12 may be equal to or lower than the Tg temperature. For example, when the temperature is 40 ° C. or higher, the abrasive grains can be backfilled or embedded in the resin 12. This temperature is affected by the concentration of the grindstone, the composition of the thermoplastic resin, crystallinity, and the like, and when the abrasive grain size is small, it is easily embedded even if the temperature is low. However, since it becomes difficult to embed when the abrasive grain size is 5 microns or more, a temperature equal to or higher than the Tg temperature is preferable.

  When the grindstone 15 is brought into contact with the workpiece, the plate 31 or the disk 32 and the abrasive grains are backfilled or buried in the resin 12, the grindstone 15 exceeds the Tg temperature. Then, the shape of the grindstone 15 cannot be maintained. Therefore, it is preferable to heat the resin at a Tg temperature or lower, for example, 300 ° C. or lower.

  As a method for producing a grinding wheel, a grindstone gripping portion having a shift prevention structure is arranged in a mold, and a thermoplastic resin 12 in a plastic state is mixed with abrasive grains 11 and a thermoplastic resin in which the abrasive grains are mixed. The grinding wheel may be manufactured by pouring a resin part material made of the above into the mold so that the grinding wheel has a desired shape and is cooled.

  Further, in the case of a grindstone gripping portion that does not have a whetstone displacement prevention structure, an adhesive may be applied to at least one portion of the portion of the grindstone gripping portion to which the thermoplastic resin adheres and may be placed in the mold. .

  Table 2 shows that the concentration of No. 1500 diamond powder is changed to 100, 125, 150, 175, 200, 300 in a crystalline (crystallinity 60%) PPS thermoplastic resin and kneaded to change the grinding stone. It shows the heating temperature required to make the resin completely plastic when manufactured. In addition, a material in which the resin is kneaded with the diamond powder and a grindstone gripping part are inserted into the mold 10 shown in FIG. 1, and the grindstone gripping part is pressed at 20 N / mm toward the mold 10 side. While preheating at 200 ° C., the temperature is rapidly increased to 400 ° C. with 20 N / mm, cooled to 200 ° C., the thermoplastic resin is solidified, the lid is removed, and the grindstone gripping part is removed. Press to make a grinding wheel (note that the temperatures indicate the heater temperature and are different from the temperature of the thermoplastic resin).

  When the concentration is 100 and 125, the thermoplastic resin is partially in a powdery state at 360 ° C. or lower, and when it exceeds 360 ° C., it becomes a completely plastic state and the grindstone is shaped, as can be seen from Table 2. As the degree of concentration increases, the fluidity of the resin deteriorates, so the heating temperature required to bring the resin into a completely plastic state increases.

  If preheating is not performed, the heating temperature at which the resin is plasticized tends to increase, and the reproducibility of the control temperature is lost.

It is a vertical side view of the shaping | molding apparatus of the grindstone of this invention. It is an expanded longitudinal cross-sectional view of the principal part of the grindstone of this invention. It is a vertical side view for description of the grinding wheel with a shank of the present invention. It is a vertical front view for description of the grinding wheel with a flange of the present invention. It is a vertical front view for description of the segment type grinding wheel of the present invention. It is a vertical side view for description of the slip prevention tool of the grinding wheel with a shank of the present invention. It is a front view for description of the slip prevention tool of the grinding wheel with a shank of the present invention. It is an expansion vertical section top view for explanation of the segment type grinding wheel of the present invention. It is a vertical side view for description of the principal part of the grindstone of the present invention. It is a vertical side view for description of the backfill structure of the abrasive grains of the grindstone of the present invention. It is a vertical side view for description of the backfill structure of the abrasive grains of the grindstone of the present invention. It is a vertical side view for description of dressing of the grindstone of the present invention. It is a vertical plan view for description of the method for embedding abrasive grains of the grindstone of the present invention. It is a vertical plan view for description of a method for embedding other abrasive grains of the grindstone of the present invention. It is a perspective view for demonstrating the truing method of the conventional grindstone. It is a perspective view for demonstrating the dressing method of the conventional grindstone. It is a perspective view for description of the other dressing method of the conventional grindstone.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Truer 2 Grinding wheel 3 Shaft 4 Trull grinding wheel 5 Turntable 6 Block dresser 7 Single stone diamond 8 Cylindrical part 9 Lid 10 Mold 11 Abrasive grain 13 Thermoplastic resin 13 Shaft 14 Heater 15 Grinding wheel 16 Shank 17 Flange 18 Segment 19 Grinding wheel 20 Grinding Wheel 21 Grinding Wheel 22 Shaft 23 Head 24 Groove 25 Deviation Prevention Tool 26 Dimple 27 Deviation Prevention Tool 28 Abrasive Grain 29 Jig Tool 30 Single Stone Diamond 31 Plate 32 Disc

Claims (23)

  A grindstone in which a large number of abrasive grains and a resin portion made of a synthetic resin are bonded to each other, and the resin portion includes a thermoplastic resin, and by applying heating and external force to at least a part of the resin portion, A grindstone characterized in that the position of the abrasive grains is moved.   The grindstone according to claim 1, wherein the abrasive grains are scattered on at least a surface of the resin portion.   The grindstone according to claim 1 or 2, wherein the abrasive grains are composed of particles having a plurality of different particle size (particle size) distributions.   4. The grindstone according to claim 1, wherein a film that reflects, scatters, or absorbs light is formed on at least a part of a surface of the abrasive grain.   The grindstone according to claim 1, 2, 3, or 4, wherein the abrasive grains are composed of a plurality of different hardnesses.   The grindstone according to claim 1, 2, 3, 4 or 5, wherein the resin portion is composed of a plurality of layers.   The grindstone according to claim 6, wherein the resin portion composed of a plurality of layers has a different composition in each layer.   The grindstone according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the resin portion contains at least one of a coloring component and a coloring component.   The grindstone according to claim 8, wherein the coloring component of the resin part includes a material that emits fluorescence when irradiated with ultraviolet rays.   The grindstone according to claim 8 or 9, wherein a content of the coloring component or the coloring component in the resin portion is 30% by weight or less based on the weight of the resin portion.   2. The resin part, wherein a light absorber that absorbs 30% or more of the irradiated light is blended in an amount of 30% by weight or less based on the weight of the resin part. The grindstone according to 2, 3, 4, 5, 6, 7, 8, 9 or 10.   The resin portion includes polyphenylene sulfide (PPS), polyester elastomer (TPC), polyarylate (PAR), polysulfone (PSU), polyethersulfone (PESU), polyetheretherketone (PEEK), polyetherimide (PEI), The grindstone according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11, which is polyamideimide (PAI).   A grindstone in which a large number of abrasive grains and a resin portion made of a synthetic resin are bonded to each other, and the resin portion includes a thermoplastic resin, and by applying heating and external force to at least a part of the resin portion, A grinding wheel comprising a grindstone in which the position of the abrasive grains is moved, and a grindstone gripping portion having a shift prevention portion of the grindstone.   A grindstone in which a large number of abrasive grains and a resin portion made of a synthetic resin are bonded to each other, and the resin portion includes a thermoplastic resin, and by applying heating and external force to at least a part of the resin portion, The grinding wheel according to claim 1, comprising a grindstone in which the position of the abrasive grains is moved, a grindstone gripping portion of the grindstone, and an adhesive for fixing the grindstone and the grindstone gripping portion. Applying external force to the resin part in a state where the resin part is softened by heating at least a part of the resin part of the grindstone consisting of a large number of abrasive grains and a resin part containing a thermoplastic resin,
A method for producing a grindstone, comprising adjusting the position of the abrasive grains. Abrasive grains are mixed into the resin part containing the thermoplastic resin, and this is heated to a plastic state.
The resin part mixed with the abrasive grains is cooled and molded into a desired shape,
Applying external force to the resin part in a state where the resin part is softened by heating at least a part of the resin part molded into the desired shape,
A method for producing a grindstone, comprising adjusting the position of the abrasive grains.   The method of heating at least a part of the resin part includes bringing the resin part or the workpiece to move relatively by bringing at least a part of the resin part into contact with the workpiece and moving the resin part or the workpiece relative to each other. The method for producing a grindstone according to claim 15 or 16, wherein a frictional heat that is equal to or higher than a temperature at which the thermoplastic resin of the resin portion is softened is generated between the workpiece and the workpiece.   The method of heating at least a part of the resin part includes bringing at least a part of the resin part into contact with a truer, a dresser, or a workpiece heated above a temperature at which the thermoplastic resin of the resin part is softened. The method for producing a grindstone according to claim 15 or 16, characterized in that Place the grindstone gripping part on the molding die,
Abrasive grains are mixed in a resin part containing a thermoplastic resin, and this is heated to be in a plastic state, and a resin part material in a plastic state is poured into a molding die.
The resin part mixed with the abrasive grains is cooled and molded into a desired shape,
Applying external force to the resin part in a state where the resin part is softened by heating at least a part of the resin part molded into the desired shape,
A method of manufacturing a grinding wheel, comprising adjusting the position of the abrasive grains. Place a grindstone gripping part with a whetstone slip prevention part in the molding die,
Abrasive grains are mixed in a resin part containing a thermoplastic resin, and this is heated to be in a plastic state, and a resin part material in a plastic state is poured into a molding die.
The resin part mixed with the abrasive grains is cooled and molded into a desired shape,
Applying external force to the resin part in a state where the resin part is softened by heating at least a part of the resin part molded into the desired shape,
A method of manufacturing a grinding wheel, comprising adjusting the position of the abrasive grains. Place the grindstone gripping part on the molding die,
Applying an adhesive to at least a part of the grindstone gripping part,
Abrasive grains are mixed in a resin part containing a thermoplastic resin, and this is heated to be in a plastic state, and a resin part material in a plastic state is poured into a molding die.
The resin part mixed with the abrasive grains is cooled and molded into a desired shape,
Applying external force to the resin part in a state where the resin part is softened by heating at least a part of the resin part molded into the desired shape,
A method of manufacturing a grinding wheel, comprising adjusting the position of the abrasive grains. With at least a part of the resin part of the grinding wheel composed of a resin part containing a thermoplastic resin and a grindstone gripping part heated to soften the resin part, abrasive grains are arranged on the surface of the resin part to external force Add
A method for manufacturing a grinding wheel, wherein the abrasive grains are pushed into the resin portion so that a protruding height of the abrasive grains from the resin portion becomes a desired height. Place a grindstone gripping part with a whetstone slip prevention part in the molding die,
The resin part containing the thermoplastic resin is heated to a plastic state and poured into a mold,
The resin part is cooled and molded into a desired shape,
In a state where at least a part of the resin part is heated and the resin part is softened, an external force is applied by placing abrasive grains on the surface of the resin part,
A method for manufacturing a grinding wheel, wherein the abrasive grains are pushed into the resin portion so that a protruding height of the abrasive grains from the resin portion becomes a desired height.

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