TWI705875B - Grindstone and, method for manufacturing same - Google Patents

Abstract

The present invention provides a grinding stone for grinding with good chip discharge and improving grinding efficiency; and a manufacturing method of the grinding stone for grinding. The grinding stone for grinding of the present invention has: a base metal (2) with a workpiece facing surface facing the workpiece (W); and a fixed abrasive grain cutting line (10) with a large number of abrasive grains (11) fixed on the core wire (12) Thus, by fixing the fixed abrasive grain cutting line (10) to the workpiece facing surface of the base metal (2), a grinding portion (3) for workpiece grinding is formed on the workpiece facing surface, and a " A discharge groove for chip discharge formed by a recess (5) between adjacent fixed abrasive grain cutting lines (10, 10).

Description

Grinding stone for grinding and manufacturing method thereof

[0001] The present invention relates to a grinding stone for grinding used for grinding a workpiece formed of a metal material, a ceramic material, etc., and a manufacturing method thereof.

[0002] Conventionally, with regard to grinding grindstones used to grind "workpieces made of metal materials, ceramic materials, etc.", for example, the following technology is known: having "a workpiece facing surface facing the workpiece" The base metal; and "on the opposite surface of the workpiece, with an appropriate bonding material to hold the abrasive grain layer such as diamond and cBN abrasive grains", that is, the grinding layer (please refer to Patent Document 1). Then, when using this grinding stone for grinding to grind the workpiece, the grinding stone for grinding is assembled in an appropriate grinding device, and the base metal is rotated around its axis at high speed and fed (feeding) toward the workpiece. The grinding layer on the opposite surface of the workpiece of the base metal contacts the workpiece. Thereby, the abrasive grains exposed on the surface of the grinding layer become cutting edges, and the workpiece is ground.　　[0003] However, in this type of grinding stone for grinding, the chips generated during the grinding of the workpiece are clogged due to accumulation in the chip pockets between the abrasive grains. As a result, there is a concern that the grinding efficiency may decrease. Therefore, in this type of grinding stone, it is preferable to provide a discharge groove for chip discharge "to improve chip discharge performance" in the above-mentioned grinding layer, and discharge the chip to the outside through the discharge groove .　　 As for the conventional technology of the present invention, for example, the technology described in Patent Document 2 can be cited. [Prior Art Document] [Patent Document] 　　[0004] 　　[Patent Document 1]: Japanese Patent Laid-Open No. 2010-46771 　　[Patent Document 2]: Japanese Patent Laid-Open No. 63-283865

[Problem to be solved by the invention] 　　[0005] In view of this, the technical problem of the present invention is to provide a grinding stone for grinding with good chip discharge and improving grinding efficiency; and a grinding stone for grinding Production method. [Means to Solve the Problem] 　　[0006] In order to solve the above-mentioned problems, according to the present invention, a grinding stone for grinding is provided, which is characterized by having: a base metal having a workpiece facing surface facing the workpiece; and a fixed abrasive grain cutting line, The core wire is formed by fixing a large number of abrasive grains, and by fixing the fixed abrasive grain cutting line to extend adjacent to the workpiece facing surface of the base metal, a grinding part for grinding the workpiece is formed on the workpiece facing surface, and Form "discharge grooves for chip discharge formed by the recesses between adjacent fixed abrasive grain cutting lines". [0007] At this time, it is preferable that the workpiece facing surface of the base metal is formed by the outer peripheral surface around the rotation axis of the base metal, and the fixed abrasive grain cutting line is in the direction of the base metal along the rotation axis. The outer peripheral surface of the base metal is wound in a spiral shape and fixed to the base metal. In this way, the grinding part is formed on the outer peripheral surface of the base metal, and the line is cut by the fixed abrasive grains adjacent in the direction of the rotation axis The recesses between them form the above-mentioned discharge grooves. Next, it is preferable that the fixed abrasive grain cutting line has a first end and a second end at both ends in the longitudinal direction, and the first end is fixed to one end of the base metal in the direction of the axis of rotation , Its second end is fixed to the other end of the base metal in the direction of the axis of rotation, and is located in the middle between the first end and the second end, and is opposite to the outer peripheral surface of the base metal. The fixed state is wound so as to be relatively movable in the direction of the rotation axis. [0008] In addition, in the grinding stone for grinding of the present invention, the workpiece facing surface of the base metal may be formed by an end surface on one end side in the direction of the rotation axis of the base metal, and the fixed abrasive grain The cutting line is fixed to the base metal on the end surface of the base metal in a spirally wound state around the above-mentioned rotating shaft. In this way, the above-mentioned grinding part is formed on the end surface of the base metal, and by The above-mentioned discharge groove is formed in the recesses between the adjacent fixed abrasive cut lines in the radial direction of the base metal. [0009] At this time, it is preferable that the fixed abrasive grain cutting line has a first end and a second end at both ends in the longitudinal direction, and the first end is at one end in the radial direction of the base metal Side is fixed, the second end is fixed on the other end side in the radial direction of the base metal, and is located in the middle part between the first end and the second end, relative to the end face of the base metal, along the The longitudinal direction of the fixed abrasive grain cutting line is intermittently fixed. [0010] In addition, the end surface of the base metal may also be engraved with a guide groove recessed in a spiral shape, and the fixed abrasive grain cutting line is arranged in the guide groove along the length direction of the guide groove. In the state in the guide groove, it is fixed to the base metal. [0011] Not only that, according to the present invention, there is provided a method for manufacturing a grinding stone for grinding, which is formed on the opposite surface of the workpiece having a base metal for the opposite surface of the workpiece. A method for manufacturing a grinding stone for grinding of a grinding part and a discharge groove for chip discharge, which is characterized by comprising: using the outer peripheral surface around the rotating shaft of the base metal as the opposite surface of the workpiece, and fixing abrasive grains on the core wire The fixed abrasive grain cutting line formed is wound spirally on the outer peripheral surface of the base metal from one end to the other end in the direction of the rotation axis, and the grinding part is formed on the outer peripheral surface, and the The step of forming the above-mentioned discharge groove between the recesses between the adjacent fixed abrasive cut lines in the direction of the rotation axis; and the step of fixing the first end and the second end of the fixed abrasive cut line in the longitudinal direction to the base metal. [0012] In addition, according to the present invention, there is provided a method for manufacturing a grinding stone for grinding, which is formed on the opposite surface of the workpiece having a base metal for the opposite surface of the workpiece to be used for grinding the workpiece. A method for manufacturing a grinding stone for grinding with a discharge groove for discharging a chip and a chip is characterized by comprising: an end surface of one end in the direction of a rotation axis of the base metal is used as the opposing surface of the workpiece, and a grinding stone is fixed to the core wire The fixed abrasive grain cutting line formed by grains is wound on the end surface of the base metal in a spiral shape around the rotating shaft, and the above-mentioned grinding portion is formed on the end surface, and is adjacent to each other in the radial direction of the end surface. The step of fixing the recesses between the fixed abrasive grain cutting lines to form the above-mentioned discharge groove; and combining the first end portion and the second end portion in the longitudinal direction of the fixed abrasive grain cutting line, and the first end portion located on the fixed abrasive grain cutting line and The step of fixing the middle part between the second end parts to the base metal. [0013] At this time, it may also include: engraving the end surface of the base metal with a "guide groove recessed in a spiral around the rotation axis"; cutting the fixed abrasive grain along the above The step of arranging the guide groove in the longitudinal direction of the guide groove. [Effects of the invention] 　　[0014] According to the present invention described above, by fixing the fixed abrasive cutting line to the "workpiece opposed surface of the base metal facing the workpiece", it can be placed on the base metal's workpiece opposed surface , At the same time, a grinding part for grinding the workpiece and a discharge groove for chip discharge are formed. Therefore, it is possible to provide a grinding stone for grinding that has good chip discharge properties and can improve grinding efficiency; and a method for manufacturing the grinding stone for grinding.

[0016] Figures 1 to 5 show the first embodiment of the polishing grindstone of the present invention. The grinding stone 1A for grinding is used to grind the part of the workpiece W such as metal materials and ceramic materials, and has: a base metal 2 having a workpiece opposite surface facing the workpiece W; and a workpiece opposite to the workpiece Grinding part 3 for workpiece grinding. When the workpiece W is ground by the grinding grindstone 1A, as shown in Figure 2, the base metal 2 is mounted on an appropriate grinding device not shown in the figure, and the base metal 2 is around Feeding (feeding) is performed while the rotation axis L is rotating, and the grinding layer 3 provided on the workpiece facing surface of the base metal 2 (the outer peripheral surface 2a of the base metal 2 described later) is brought into contact with the workpiece W. [0017] The base metal 2, for example, is made of metal such as stainless steel, aluminum, cemented carbide (Cemented Carbide), etc., formed into a cylindrical shape, or formed into a cylindrical shape to have a circular cross-section. In the present embodiment, the workpiece facing surface , Is formed by the circular outer peripheral surface 2a around the rotation axis L of the base metal 2. In addition, as shown in Fig. 1 or Fig. 2, the base metal 2 is integrally provided with a rod-shaped shaft 4 having a smaller diameter. The shaft 4 is the part clamped by the grinding device. The base metal 2 is assembled to the grinding device through the shaft 4, so that it can move in the three-axis direction while rotating around the axis L by the driving force of the grinding device. The outer diameter of the base metal 2 and the shaft 4, and the length in the direction of the rotation axis L can be arbitrarily set according to the size of the workpiece to be ground.　　[0018] Next, the specific structure of the grinding section 3 of the characteristic part of the present invention will be described. As shown in Fig. 1 or Fig. 2, the grinding portion 3 is formed by the following method: a flexible fixed abrasive grain cutting line 10 described later is formed on the outer peripheral surface 2a of the base metal 2 It is wound into a spiral state along the rotation axis L direction, and is fixed to the base metal 2. Next, the abrasive grain 11 exposed on the surface of the fixed abrasive grain cutting line 10 becomes a cutting edge, and the workpiece W is ground. [0019] As shown in FIG. 3, for the fixed abrasive grain cutting line 10 used for the grinding stone 1A, it is suitable to use the fine abrasive grains 11 such as diamond and cubic boron nitride (cBN), In a single-layer state (single-grain state), it is fixed to a flexible core wire 12 made of metal such as a piano wire. At this time, the fixing of the abrasive grains 11 toward the core wire 12 can be performed by an appropriate fixing method, but like this embodiment, in the case where the abrasive grains 11 are fixed to the core wire 12 in a single layer state, because The self-sharpening effect of the abrasive grains 11 is not produced. Therefore, once the abrasive grains 11 fall off, the machinability of the fallen off part will be dull. [0020] In view of this, in the present embodiment, the above-mentioned abrasive grains 11 are fixed by using a metal plating layer 13 formed by electrodeposition using a bonding material such as nickel, copper, etc., thereby improving the abrasive grains. 11 the holding power of the core wire 12. Therefore, it is possible to prevent the abrasive grains 11 from falling off from the core wire 12 as much as possible, and to suppress the deterioration of the fixed abrasive grain cutting line 10, that is, the grinding portion 3, and it is possible to reduce the frequency of replacement of the grinding grindstone 1A and the fixed abrasive grain cutting line 10 . [0021] In this embodiment, the grinding portion 3 is configured by cutting one fixed abrasive grain cutting line 10 with respect to the outer peripheral surface 2a of the base metal 2 along the direction of the rotation axis L In the method, one layer (single layer) is continuously wound from one end side of the base metal 2 toward the other end side. In this way, once the fixed abrasive grain cutting line 10 is wound into a single-layer spiral with respect to the base metal 2, the cross section of the core wire 12, that is, the cross section of the fixed abrasive grain cutting line 10 is slightly circular, as shown in the third As shown in FIGS. 5 to 5, on the outer peripheral surface 2a of the base metal 2, a recess 5 is formed between the fixed abrasive grain cutting lines 10, 10 adjacent to each other in the direction of the rotation axis L. [0022] The concave portion 5 is a portion formed by the valley-shaped space between the adjacent fixed abrasive grain cutting lines 10, 10, and is continuous from one end to the other along the direction of the rotation axis L of the base metal 2. The sides form a spiral shape. The above-mentioned recess 5 is the same as the chip cavity 14 between the adjacent abrasive grains 11 and 11 on the outer peripheral surface of the fixed abrasive grain cutting line 10 during the grinding process of the workpiece W, and can be used as an "improving chip discharge performance of the workpiece W" Drainage ditch will work. [0023] Although the winding pitch of the above-mentioned fixed abrasive grain cutting line 10 is arbitrary, in this embodiment, the fixed abrasive grain cutting line 10 is tightly wound on the outer peripheral surface of the base metal 2 in the following state On 2a (please refer to Figures 3 to 5): Between adjacent fixed abrasive grain cutting lines 10 and 10 in the direction of the rotation axis L, the tip of the abrasive grain 11 of one of the fixed abrasive grain cutting lines 10 ( The blade tip portion) is in contact with another fixed abrasive grain cutting line 10, that is, a state where a gap of "approximately the average abrasive particle size of the abrasive grains 11" or "the protruding amount of the abrasive grains 11 from the metal plating layer 13" is formed.　　[0024] The fixed abrasive grain cutting wire 10 has a first end and a second end at both ends in the longitudinal direction (the longitudinal direction of the core wire 12). Then, as shown in Fig. 4, the first end portion 10a of the fixed abrasive grain cutting line 10 is fixed to one end side of the outer peripheral surface 2a of the base metal 2 in the direction of the rotation axis L (that is, the central axis of the outer peripheral surface 2a 4), as shown in Figure 5, the second end 10b of the fixed abrasive grain cutting line 10 is fixed to the other end of the outer peripheral surface 2a (in the direction of the rotation axis L, located The distal end side opposite to the above-mentioned base end). [0025] Among them, the intermediate portion 10c of the fixed abrasive grain cutting line 10 located between the first end portion 10a and the second end portion 10b is wound in a non-fixed state with respect to the outer peripheral surface 2a of the base metal 2. As a result, the intermediate portion 10c is formed to be relatively movable with respect to the outer peripheral surface 2a. That is, since the intermediate portion 10c of the fixed abrasive grain cutting line 10 is not fixed to the base metal 2, it is formed to be able to face the rotation axis L on the outer peripheral surface 2a of the base metal 2 by cutting resistance or the like. The direction and the circumferential direction are slightly displaced, or the fixed abrasive grain cutting line 10 is slightly vibrated around the central axis. [0026] 15 in FIG. 4 is the first end 10a of the fixed abrasive grain cutting line 10 to be fixed to the base metal 2 by a fixing means such as soldering, brazing, or welding. The formed fixing portion, 16 in FIG. 5, is also a fixing portion formed by fixing the second end 10b of the fixed abrasive grain cutting line 10 to the base metal 2 by the fixing means. [0027] In the case of using the grinding stone 1A for grinding to grind the workpiece, as described above, the grinding stone 1A for grinding is assembled in the grinding device through the shaft 4 integrated with the base metal 2, and The grinding device sets various grinding conditions regarding the feeding (feeding) speed and number of revolutions of the grinding stone 1A for grinding, the amount of cutting into the workpiece W, and the like. Then, after setting the grinding conditions, the grinding stone 1A for grinding is fed (feeded) toward the workpiece W while rotating around the above-mentioned rotation axis L. Once so, the workpiece W comes into contact with the workpiece facing surface of the base metal 2, that is, the grinding portion 3 formed by the “fixed abrasive grain cutting line 10 wound spirally on the outer peripheral surface 2a of the base metal 2, and is The abrasive grains 11 exposed on the surface of the fixed abrasive grain cutting line 10 slowly grind the workpiece W in the above-mentioned feeding (feeding) direction. At this time, the grinding process using the grinding stone 1A for grinding is expected to be dry processing without using a grinding fluid, but it is of course possible to perform processing using a grinding fluid in accordance with the processing conditions. [0028] The chips generated during grinding enter the above-mentioned chip cavity 14 of the fixed abrasive grain cutting line 10, and enter "formed between the fixed abrasive grain cutting lines 10, 10 adjacent to each other in the direction of the rotation axis L, as The recess 5 of the chip discharge groove. Then, the chips that have entered the recess 5 are discharged to the outside by the rotation of the grinding stone 1A for grinding. At this time, since the fixed abrasive grain cutting line 10 is wound on the outer peripheral surface 2a of the base metal 2 at substantially uniform intervals along the rotation axis L, the recesses 5 extending in the circumferential direction of the base metal 2 also become It is arrange|positioned in the state of the rotation axis L direction of 1 A of grinding grindstones at substantially uniform intervals. Therefore, regardless of the position of the grinding portion 3, the concave portion 5 can be uniformly opposed to the workpiece W, so that the discharge of chips can be performed efficiently. [0029] In addition, when grinding the workpiece W, although grinding resistance is generated at the fixed abrasive cutting line 10, as described above, the fixed abrasive cutting line 10 is located at the first end 10a and the second end 10b. The intermediate portion 10c between the base metal 2 is wound in a non-fixed state to be relatively movable, so that the grinding resistance can slightly form a reciprocating motion on the outer peripheral surface 2a of the base metal 2 Displacement, or shake. Therefore, for example, even if the workpiece W is formed of a material that is easily clogged, such as a soft material, the chips can be shaken down from the recess 5 and efficiently discharged.　　[0030] Next, a procedure for manufacturing the above-mentioned grinding stone 1A for grinding will be described. First, as described above, prepare the base metal 2 formed of metal materials such as stainless steel, aluminum, cemented carbide, and having an outer peripheral surface 2a around the rotating shaft L; and fix the fine abrasive grains 11 formed of diamond and cBN It is a long strip of fixed abrasive grain cutting line 10 composed of a "core wire 12" formed of metal materials such as piano wire. Next, proceed to the following step: by winding the fixed abrasive grain cutting line 10 on the outer peripheral surface 2a of the base metal 2, the grinding portion 3 for grinding the workpiece W and the recess 5 (discharge groove) for discharging chips are formed. ). [0031] In this step, in a state where a predetermined tension is applied to the fixed abrasive grain cutting line 10, the fixed abrasive grain cutting line 10 is tightly wound along the direction of the rotation axis L on the base metal 2. The outer peripheral surface 2a is wound into a spiral shape. Then, the fixed abrasive grain cutting line 10 is continuously and tightly wound from one end of the base metal 2 in the direction of the rotation axis L to the other end, and then a layer of fixed abrasive is formed on the outer peripheral surface 2a of the base metal 2. The grinding part 3 constituted by the particle cutting line 10. In addition, at the same time, a recess 5 (discharge groove) for discharging chips is formed between the fixed abrasive grain cutting lines 10 and 10 adjacent in the direction of the rotation axis L. The method of winding the fixed abrasive grain cutting wire 10 on the base metal 2, for example, can be performed by using a specific wire winding machine or the like. [0032] Next, by cutting both ends of the fixed abrasive grain cutting wire 10 wound around the base metal 2, a first end and a second end are formed at both ends in the longitudinal direction (the core wire 12 direction). , The first end portion 10a is fixed to one end side of the base metal 2 in the direction of the rotation axis L by an appropriate fixing method such as soldering, brazing, or welding. In addition, similarly to the first end 10a, the second end 10b of the fixed abrasive grain cutting line 10 is fixed to the other end of the base metal 2 in the direction of the rotation axis L. As a result, the grinding stone 1A for grinding in this embodiment can be obtained. [0033] In addition, when the fixed abrasive grain cutting line 10 assembled in the base metal 2 is removed, for example, in the case where the above-mentioned fixing means such as soldering is used, the fixed part can be lasered. Remove by appropriate methods such as heating. When manufacturing the above-mentioned grinding stone 1A, for example, the first end portion of the fixed abrasive cutting line 10 may be formed by cutting or the like before winding the fixed abrasive cutting line 10 around the base metal 2. 10a, and fix it to one end of the base metal 2, and then spirally wind the fixed abrasive grain cutting line 10 from one end of the base metal 2 to the other end, and then form the fixed abrasive cut by cutting or the like The second end 10b of the wire 10 is fixed to the other end of the base metal 2. [0034] In this way, in the first embodiment, by placing the "fixed abrasive grain cutting line 10 with the abrasive grains 11 fixed on the core wire 12" on the outer peripheral surface 2a of the base metal 2 along its rotation axis The state is wound in a spiral shape in the L direction and fixed to the base metal 2 to form the grinding portion 3 for grinding the workpiece W. In addition, at the same time, the fixed abrasive grain cutting lines 10, 10 adjacent in the rotation axis L direction In between, a recess 5 (discharge groove) for chip discharge is also formed. Therefore, it is possible to provide the grinding grindstone 1A for grinding which can suppress the clogging of the grindstone due to the good chip discharge performance and has good grinding efficiency with high productivity and low cost. [0035] When the machinability of the grinding grindstone 1A for grinding decreases, simply remove the used fixed abrasive grain cutting wire 10 from the base metal 2, and rewind and fix the new fixed abrasive grain cutting wire 10 to the base metal 2. Therefore, the base metal 2 can be reused without discarding, and the operating cost of the grinding stone 1A for grinding can also be suppressed by the aforementioned method. [0036] Although the above-mentioned base metal 2 constitutes "Assembled in the grinding device through the shaft 4", the present invention is not limited to this. It may be a straight grinding wheel with assembling holes passing through the thickness direction. The base metal is installed on the spindle of the grinding device through the above-mentioned assembly hole. In addition, in Fig. 2, although the above-mentioned grinding stone 1A for grinding is shown as an example for flat grinding, the present invention is not limited to this. For example, it can also be used for cylindrical grinding and inner surface grinding. . Not only that, although in the above embodiment, the fixed abrasive grain cutting line 10 is fixed to the outer circumferential surface 2a of the base metal 2 at two positions of the first end 10a and the second end 10b, but in addition, It may be fixed to the base metal 2 at three or more positions including "the central part of the fixed abrasive grain cutting line 10 wound around the base metal 2". [0037] Figures 6 to 9 are diagrams showing the second embodiment of the grinding stone for grinding in the present invention, the grinding stone 1B of the second embodiment and the grinding stone of the first embodiment described above The difference of 1A is that the workpiece facing surface of the base metal 2 facing the workpiece W is arranged on one side of the base metal 2 in the direction of the rotation axis L (in the direction of the rotation axis L, located on the above axis 4), and a slightly rounded end surface 2b is formed, and a grinding portion 3 for workpiece grinding and a recess 5 for chip discharge are provided on the end surface 2b. The grinding stone 1B of the second embodiment is mainly used for lapping. The end surface 2b side of the base metal 2 that rotates about the rotation axis L is pressed against the workpiece W, and is set on the end surface 2b. The grinding part 3 smoothes the surface of the workpiece W. Since the structure other than the above is substantially the same as the grinding stone 1A of the first embodiment, the main parts of the same structure are marked with the same drawing numbers as the grinding stone 1A of the first embodiment. The structural parts and the effects based on the structural parts are omitted in order to avoid repetitive description. [0038] As shown in FIG. 6 or FIG. 7, the end surface 2b of the base metal 2 forms a flat surface, and the fixed abrasive grain cutting line 10 is "wound in a scroll shape around the rotation axis L". The state is fixed to the end surface 2b. Thereby, the grinding part 3 is formed on the end surface 2b of the base metal 2, and the recess 5 for chip discharge is formed between the fixed abrasive cutting lines 10 and 10 adjacent to the radial direction of the base metal 2. At this time, the pitch of the winding in the radial direction of the base metal 2, the number of windings, and the fixed abrasive grain cutting line 10 are arbitrary, but in this embodiment, a fixed abrasive grain is used for cutting The wire 10 is wound tightly in a spiral shape on the aforementioned end surface 2b from the vicinity of the outer peripheral edge toward the center position. [0039] As shown in FIGS. 6 and 8 and 9, in the grinding stone 1B, the first end portion 10a of the fixed abrasive grain cutting line 10 is fixed to the end surface of the base metal 2. On the outer peripheral edge side of 2a, the second end 10b of the fixed abrasive grain cutting line 10 is fixed to a substantially central position of the end surface 2b. In addition, the intermediate portion 10c located between the first end portion 10a and the second end portion 10b is intermittently fixed with a predetermined interval along the longitudinal direction of the fixed abrasive grain cutting line 10 with respect to the end surface 2b. Accordingly, the intermediate portion 10c alternately has a fixed portion 17 fixed to the end surface 2b of the base metal 2 along the aforementioned longitudinal direction; and a non-fixed portion not fixed to the end surface 2b of the base metal 2 (please refer to Figure 8, Figure 9). As a result, the non-fixed portion is displaced or shaken on the end surface 2b of the base metal 2 due to the cutting resistance during the grinding process of the workpiece W. [0040] With regard to the means for fixing the abrasive grain cutting line 10 to the base metal 2, the method is performed by soldering, brazing, welding, etc., as in the first embodiment. In this embodiment, for example, As shown in Fig. 7 with Fig. 17, the fixed abrasive grain cutting line 10 is spot welded by spot welding such as resistance welding, laser welding, and arc welding. In the example shown in FIG. 7, each fixing portion 17 for fixing the abrasive grain cutting line 10 is located on the radially inner side of the base metal 2, but may be located on the radially outer side. In addition, 15 in Figure 8 is formed by fixing the first end portion 10a of the fixed abrasive grain cutting line 10 with respect to the end surface 2b of the base metal 2 at a position near the outer periphery of the end surface 2b by the above-mentioned fixing means. The fixing part, 16 in Fig. 9, is a fixing part formed by fixing the second end 10b at the approximate center of the end surface 2b by the fixing means described above with respect to the end surface 2b. [0041] In the case of manufacturing the grinding stone 1B of the second embodiment, the base metal 2 and the fixed abrasive grain cutting line 10 are prepared, and the fixed abrasive grain cutting line 10 is placed on the end surface 2b of the base metal 2. The upper part is tightly wound into a scroll shape around the above-mentioned rotating shaft L and fixed to the end surface 2b. Here, when the fixed abrasive grain cutting line 10 is wound, for example, the fixed abrasive grain cutting line 10 is wound multiple times from the outer peripheral side of the base metal 2 toward the center side. In this case, first, the winding start end side (the first end portion 10a side) of the fixed abrasive grain cutting line 10 is located near the outer peripheral edge of the end surface 2b with respect to the base metal by the spot welding, etc. The fixing means to be fixed. Then, the fixed abrasive grain cutting line 10 is wound into a spiral shape toward the center of the end surface 2 b, and is fixed to the base metal 2 at a predetermined interval along the longitudinal direction of the fixed abrasive grain cutting line 10. The above operations are repeated in sequence, and finally, at the approximate center of the end surface 2b of the base metal 2 (near the rotation axis L), the winding terminal side (the second end 2b side) of the fixed abrasive grain cutting line 10 is fixed to The base metal 2. Next, cutting or the like is performed on the remaining parts of the winding start side and the winding end side of the fixed abrasive grain cutting line 10. [0042] In this way, it is possible to obtain: with respect to the end surface 2b of the base metal 2, the fixed abrasive cutting line 10 is fixed in a spiral shape and adjacent to the base metal 2 in the radial direction. Between, 10, the grinding stone 1B for forming the recess 5 for chip discharge. It is also possible to cut both ends of the fixed abrasive grain cutting line 10 before the fixing step of the fixed abrasive grain cutting line 10 to form the first end portion 10a and the second end portion 10b in advance, and to cut them as described above The base metal 2 is wound around the end surface 2b and fixed to the end surface 2b. In addition, although in the above description, the fixed abrasive grain cutting line 10 is wound from the outer peripheral side of the base metal toward the center, of course, the opposite method can also be adopted, from the center side to the outer peripheral side, or The fixed abrasive grain cutting line 10 may be welded sequentially from the radially outer side of the base metal 2.　　[0043] Figures 10 to 13 are diagrams showing the third embodiment of the present invention. The difference between the grinding stone 1C of the third embodiment and the grinding stone 1B of the second embodiment is that the end surface 2b that becomes the "work opposing surface facing the workpiece W" has the rotation axis L as In the center, a guide groove 20 recessed in a slightly spiral shape is provided, and in the guide groove 20, the fixed abrasive grain cutting line is arranged in a spiral state along the guide groove 20 10. In this state, it is fixed to the base metal in the guide groove 20.　　[0044] The spiral-shaped guide groove 20 is continuously continuous from the vicinity of the outer periphery of the end surface 2b of the base metal 2 toward the central portion. In addition, as shown in FIG. 11, the guide groove 20 has a slightly rectangular cross-sectional shape, the groove width is formed slightly larger than the diameter of the fixed abrasive grain cutting line 10, and the groove depth is formed to be larger than the fixed abrasive grain cutting line 10 Line 10 has a shallower diameter. Accordingly, once the fixed abrasive grain cutting line 10 is accommodated in the guiding groove 20 along the longitudinal direction of the guiding groove 20, as shown in FIG. 11, the fixed abrasive grain cutting line 10 is slightly curved The surface of the base metal 2 protrudes from the end surface 2b of the base metal 2, and the workpiece W can be ground by the protruding fixed abrasive cutting line 10. [0045] Next, as shown in FIG. 11, in the grinding stone 1C of the third embodiment, a chip discharge is formed between the fixed abrasive grain cutting lines 10 and 10 adjacent in the radial direction of the base metal 2. Used recess 5. In addition, the winding pitch of the fixed abrasive grain cutting lines 10, 10 that determines the width of the recess 5 actually corresponds to the radial pitch of the guide groove 20 adjacent to the base metal 2 in the radial direction. In the form, the winding pitch of the guide groove 20 is set such that the fixed abrasive grain cutting wire 10, 10 adjacent to the fixed abrasive grain cutting wire 10 is housed in the guide groove 20 The abrasive grains 11 are separated to the extent that they do not come into contact with each other.　　[0046] Regarding the fixing means for fixing the abrasive grain cutting line 10, in this third embodiment, a resin-based adhesive is used. Then, with the adhesive, as shown in Fig. 12 or Fig. 13, the first end 10a of the fixed abrasive grain cutting line 10 is fixed to one end side (outermost peripheral side) of the guide groove 20 in the longitudinal direction. The position of the groove end 20a and the second end 10b of the guide groove 20 are fixed to the position of the groove end 20b on the other end side (center side) of the guide groove 20 in the longitudinal direction. In addition, the intermediate portion 10 c of the fixed abrasive grain cutting line is intermittently fixed to the base metal 2 in the guide groove 20 along the longitudinal direction of the fixed abrasive grain cutting line 10. [0047] With regard to the above-mentioned adhesive, for example, by adopting "when hardened, a soft adhesive layer that is imitative to deformation is formed" to form: during grinding processing of the workpiece W, etc. With the contact resistance or the like, the fixing portions 15-17 that fix the abrasive grain cutting line 10 are fixed to the end surface 2b, and the end surface 2b is slightly displaced. In addition, although in the example shown in FIG. 11, the fixed abrasive grain cutting line 10 is fixed to the base metal 2 in a non-contact state at the bottom of the guide groove 20, it can also be in contact with the groove The bottom state is fixed in the guide groove 20.　　[0048] The process of manufacturing the grinding stone 1C for grinding shown in the third embodiment will be described. In the case of manufacturing the grinding stone 1C for grinding, before the fixed abrasive grain cutting line 10 is fixed to the base metal 2, first, the end surface 2b of the base metal 2 is engraved with a "rotation axis around the base metal 2" L is a scroll-shaped guide groove 20'. The forming step of the guide groove 20 is performed by, for example, a laser processing machine or the like, whereby a spiral groove having an appropriate groove width and groove depth is formed at a specific winding pitch. After that, the "ditch end 20a" located on one end of the outermost peripheral side and the "ditch end 20b located on the other end of the innermost peripheral side" in the guide groove 20 are filled with a resin-based adhesive, and The two ends 20a, 20b are intermittently filled with adhesive along the longitudinal direction of the guide groove 20 while maintaining a certain interval. Thereby, the adhesive layer (the part of the fixed layer 15-17) is formed in the part of the guide groove 20 that has been filled with the adhesive. Then, proceed to the fixing step described below. At this time, before the adhesive layer is completely hardened, the fixed abrasive grain cutting line 10 is arranged in the guide groove 20 along the longitudinal direction of the guide groove 20 . [0049] Here, although a fixed abrasive grain cutting line 10 having a length corresponding to the length of the guide groove and having a first end 10a and a second end 10b is adopted, of course, it can be implemented as in the second As described in the manufacturing steps of the grinding stone 1B for grinding, after the long fixed abrasive grain cutting line 10 is fixed to the base metal 2 (in the guide groove 20), both of the fixed abrasive grain cutting line 10 The ends are cut to form a first end 10a and a second end 10b. [0050] In the step of fixing the fixed abrasive grain cutting line 10 to the base metal 2, for example, as shown in FIG. 12, the first end portion 10a of the fixed abrasive grain cutting line 10 and the guide groove 20 One end of the groove end 20a is slightly aligned. In this state, the fixed abrasive grain cutting line 10 is wound into a spiral along the longitudinal direction of the guide groove 20, and then, as shown in FIG. 13, The second end portion 10b of the fixed abrasive grain cutting line 10 is arranged to slightly coincide with the groove end portion 20b on the other side of the guide groove 20. In this way, it is possible to obtain: with respect to the end surface 2b of the base metal 2, the fixed abrasive grain cutting line 10 is fixed in a spiral shape, and the fixed abrasive grain cutting lines 10, 10 are adjacent to each other in the radial direction of the base metal 2. In the meantime, a grinding stone 1C for grinding of the recess 5 for chip discharge is formed.　　[0051] In the third embodiment, the guide groove 20 is formed by a laser processing machine, but it may be formed by cutting with a cutting edge such as a cutting tool. In addition, with regard to the cross-sectional shape of the guide groove 20, as long as a part of the fixed abrasive grain cutting line 10 can be accommodated in the guide groove 20, and a part of the outer peripheral surface of the fixed abrasive grain cutting line 10 protrudes outward, For example, it may be a cross-sectional shape having a "slightly circular cross section" and a "slightly V-shaped cross section". [0052] Above, the grinding stone for grinding of the present invention and its manufacturing method have been described, but the present invention is not limited to the above-mentioned embodiments, and of course there can be various types without departing from the scope of the patent application. Such design changes.

[0053] 1A, 1B, 1C‧‧‧Grinding stone for grinding 2‧‧‧Base metal 2a‧‧‧Outer peripheral surface 2b‧‧End surface 3‧‧‧Grinding part 5‧‧‧Concave 10‧‧‧Fixed abrasive grain Fixed abrasive grain wire 10a‧‧‧First end 10b‧‧‧Second end 10c‧‧‧Middle part 11‧‧‧Abrasive grain 12‧‧‧Core wire 20‧‧‧Guide Lead groove W‧‧‧Workpiece

[0015] "Figure 1": is a schematic diagram showing the first embodiment of the grinding stone of the present invention.　　 Figure 2: A schematic perspective view schematically showing the state of the above-mentioned polishing grindstone before the workpiece is polished.　　 Figure 3: A partial enlarged cross-sectional view of a cutting line of fixed abrasive grains wound on a base metal.　　 Figure 4: is a partially enlarged side view schematically showing the area A surrounded by a dotted line in Figure 1.　　 Figure 5: is a partially enlarged side view schematically showing the area B surrounded by a dotted line in Figure 1.　　 Figure 6: is a plan view schematically showing the second embodiment of the polishing grindstone of the present invention.　　 Figure 7: is an enlarged partial cross-sectional view showing the "intermediate part of the fixed abrasive cut line wound around the base metal in Figure 6".　　 Figure 8: is a partially enlarged top view schematically showing the area C surrounded by a dotted line in Figure 6.　　 Figure 9: is a partially enlarged plan view schematically showing the area D surrounded by a dotted line in Figure 6.　　 Figure 10: is a plan view schematically showing the third embodiment of the polishing grindstone of the present invention.　　 Figure 11: is an enlarged partial cross-sectional view showing "the middle part of the fixed abrasive cut line wound around the base metal in Figure 10".　　 Figure 12: is a partially enlarged plan view schematically showing the area E surrounded by a dotted dotted line in Figure 10.　　 Figure 13: is a partially enlarged plan view schematically showing the area F surrounded by a dotted line in Figure 10.

2‧‧‧Base metal

2a‧‧‧Outer peripheral surface

5‧‧‧Concave

10‧‧‧Fixed abrasive grain cutting line

11‧‧‧Grit

12‧‧‧Core wire

13‧‧‧Metal plating

14‧‧‧ Crumbs

Claims (8)

A grinding stone for grinding, which is characterized in that it has: a base metal with a workpiece opposite surface for facing the workpiece; and a fixed abrasive grain cutting line formed by fixing a large number of abrasive grains on the core wire, the workpiece opposite surface, Formed by the outer peripheral surface around the rotating shaft of the base metal, the fixed abrasive grain cutting line is wound on the outer peripheral surface of the base metal in a spiral shape along the direction of the rotating shaft, and is opposite in the direction of the rotating shaft. The adjacent fixed abrasive grain cutting lines are tightly wound, so that the front end of one of the fixed abrasive grain cutting lines contacts the other fixed abrasive grain cutting line and is fixed to the base metal, thereby, in the base metal A grinding portion for grinding the workpiece is formed on the outer peripheral surface, and a discharge groove for chip discharge is formed. The discharge groove for chip discharge is formed by a recess between adjacent fixed abrasive cutting lines in the direction of the rotation axis. The grinding stone for grinding according to claim 1, wherein the fixed abrasive grain cutting line has a first end and a second end at both ends in the longitudinal direction, and the first end is fixed to the base metal One end in the direction of the rotation axis, the second end of which is fixed to the other end of the base metal in the direction of the rotation axis, and is located in the middle between the first and second ends, opposite to the base The outer peripheral surface of the metal is wound in a non-fixed state so as to be relatively movable in the direction of the rotation axis. A grinding stone for grinding, which is characterized in that it has: a base metal with a workpiece facing surface for facing the workpiece; and a fixed abrasive grain cutting line formed by fixing a large number of abrasive grains on the core wire. The facing surface is formed by the end surface at one end side in the direction of the rotation axis of the base metal, and the fixed abrasive grain cutting line is wound on the end surface of the base metal in a spiral state around the rotation axis. It is fixed to the base metal, whereby a grinding part for grinding the workpiece is formed on the end surface of the base metal, and a discharge groove for chip discharge is formed. The discharge groove for chip discharge is formed in the radial direction of the base metal It is formed by the recesses between adjacent cutting lines of fixed abrasive grains. The grinding stone for grinding according to claim 3, wherein the fixed abrasive grain cutting line has a first end and a second end at both ends in the longitudinal direction, and the first end is in the radial direction of the base metal One end side of the base metal is fixed, and the second end is fixed at the other end side in the radial direction of the base metal, and is located in the middle part between the first end and the second end, relative to the base metal The end surface is intermittently fixed along the longitudinal direction of the fixed abrasive grain cutting line. The grinding stone for grinding described in claim 3 or claim 4, wherein a guide groove recessed in a spiral shape is engraved on the end surface of the base metal. The fixed abrasive grain cutting line is fixed to the base metal in a state of being arranged in the guide groove along the longitudinal direction of the guide groove. A method of manufacturing a grinding stone for grinding is to form a grinding part for grinding the workpiece and a discharge groove for chip discharge on the opposite surface of the workpiece having a base metal for the opposite surface of the workpiece facing the workpiece. The method for producing a stone is characterized by comprising: using the outer peripheral surface around the rotating shaft of the base metal as the opposite surface of the workpiece, and cutting a fixed abrasive grain cut line formed by fixing abrasive grains on the core wire, and the base metal The outer peripheral surface of the rotating shaft is wound in a spiral shape from one end to the other end in the direction of the rotation axis, and the fixed abrasive grain cutting lines adjacent in the direction of the rotation axis are tightly wound so that one The tip of the fixed abrasive grain cutting line is in contact with another fixed abrasive cutting line, whereby the above-mentioned grinding portion is formed on the outer peripheral surface, and is formed by the concave portion between the adjacent fixed abrasive grain cutting lines in the direction of the rotation axis The step of discharging the groove; and the step of fixing the first end and the second end in the longitudinal direction of the fixed abrasive grain cutting line to the base metal. A method of manufacturing a grinding stone for grinding is to form a grinding part for grinding the workpiece and a discharge groove for chip discharge on the opposite surface of the workpiece having a base metal for the opposite surface of the workpiece facing the workpiece. The manufacturing method of the stone, It is characterized by comprising: the end surface on one end side in the direction of the rotation axis of the base metal is used as the workpiece facing surface, and a fixed abrasive grain cutting line formed by fixing abrasive grains on the core wire is formed on the end surface of the base metal The step of forming the above-mentioned grinding part on the end face by winding around the rotating shaft in a scroll shape, and forming the above-mentioned discharge groove by the concave part between the fixed abrasive grain cutting lines adjacent in the radial direction of the end face ; And the first end and the second end of the longitudinal direction of the fixed abrasive cutting line, and the intermediate part between the first end and the second end of the fixed abrasive cutting line, fixed to the base metal A step of. The method for manufacturing a grinding stone for grinding as described in claim 7, which includes: a step of engraving a guide groove recessed in a spiral shape around the rotation axis; and cutting the fixed abrasive grain along the The step of arranging the guide groove in the longitudinal direction of the guide groove.

Images