JP6755550B2 - Grinding wheel and its manufacturing method - Google Patents

Description

The present invention relates to a grinding wheel used for grinding a work made of a metal material, a ceramic material, or the like, and a method for manufacturing the grinding wheel.

Conventionally, as a grinding wheel for grinding a work made of a metal material, a ceramic material, or the like, for example, a base metal having a work facing surface facing the work and abrasive grains such as diamond or cBN on the work facing surface are appropriately used. Those having an abrasive grain layer, that is, a grinding layer held by a bond material are known (see Patent Document 1). Then, when grinding a work using such a grinding wheel, the grinding wheel is attached to an appropriate grinding device, and a feed is given toward the work while rotating the base metal around its axis at high speed. The grinding layer arranged on the work facing surface of the base metal is brought into contact with the work. By doing so, the abrasive grains exposed on the surface of the grinding layer become cutting edges, and the work is ground.

By the way, in this type of grinding wheel, chips generated during grinding of the work are accumulated in the chip pockets between the abrasive grains, which may cause clogging, resulting in a decrease in grinding efficiency. There is. Therefore, in such a grinding wheel, it is preferable that the grinding layer is provided with a discharge groove for discharging chips in order to improve the discharge property of chips, and the chips are discharged to the outside through the discharge groove.
As the prior art document related to the present invention, for example, Patent Document 2 can be mentioned.

JP-A-2010-46771 Japanese Unexamined Patent Publication No. 63-283865

Therefore, a technical object of the present invention is to provide a grinding wheel which is excellent in chip evacuation and can improve grinding efficiency and a method for manufacturing such a grinding wheel.

To solve the above problems, the present invention includes a base metal having a work facing surface for facing the workpiece, and a fixed abrasive wire comprising a number of abrasive grains is fixed to the core wire, the work The facing surface is formed of an outer peripheral surface around the rotation axis of the base metal, and the fixed abrasive grain wire is spirally wound along the rotation axis direction on the outer peripheral surface of the base metal, and the above-mentioned In the fixed abrasive wire adjacent to each other in the rotation axis direction, the tip of the abrasive grain of one fixed abrasive wire is tightly wound so as to be in contact with the other fixed abrasive wire and fixed to the base metal. A grinding portion for grinding a work is formed on the outer peripheral surface of the base metal, and a discharge groove for discharging chips is formed consisting of recesses between fixed abrasive grain wires adjacent to each other in the direction of the rotation axis . A grinding wheel characterized by this is provided.

In this case, preferably, the solid Teitogitsubu wire in its longitudinal ends have a first end and a second end, respectively, the first end portion thereof to one end of the rotation axis direction of the base metal The second end portion is fixed to the other end side of the base metal in the rotation axis direction, and the intermediate portion located between the first end portion and the second end portion is the base metal. It is wound so as to be relatively movable in the direction of the rotation axis in a non-fixed state with respect to the outer peripheral surface of the above.

Further , according to the present invention, there is a base metal having a work facing surface for facing the work, and a fixed abrasive grain wire formed by fixing a large number of abrasive grains to the core wire, and the work facing surface of the base metal. However, the fixed abrasive grain wire is formed on the end face on one end side in the rotation axis direction of the base metal, and the fixed abrasive grain wire is wound around the rotation axis in a spiral shape on the end face of the base metal. It is fixed, whereby a grinding portion for workpiece grinding is formed on the end face of the base metal, and for chip discharge consisting of recesses between fixed abrasive grain wires adjacent to each other in the radial direction of the base metal . A grinding grindstone is provided, characterized in that a discharge groove is formed .

In this case, preferably, the fixed abrasive wire has, at its longitudinal ends have a first end and a second end, respectively, secured to the radially one side of an end face of a first end thereof a trapezoidal gold It is, together with the second end of which is fixed in the radial direction other side of the該台gold, an intermediate portion positioned between these first and second ends, with respect to the end face of the metal base Te are intermittently secured along the longitudinal direction of the fixed abrasive wire.

Further, a guide groove recessed in a spiral shape is engraved on the end surface of the base metal, and the fixed abrasive grain wire is arranged in the guide groove along the length direction of the guide groove. It may be fixed to the base metal in the state of being fixed.

Further, according to the present invention, a grinding wheel in which a grinding portion for grinding a work and a discharge groove for discharging chips are formed on the surface facing the work of a base metal having a surface facing the work for facing the work. In the manufacturing method, a fixed abrasive grain wire having an outer peripheral surface around the rotation axis of the base metal as the work facing surface and abrasive grains fixed to a core wire is placed on the outer peripheral surface of the base metal and the rotation shaft thereof. and it had wound spirally toward the other end from the direction of one end side, and abrasive grains of the tip and the other fixed abrasive of one of the fixed abrasive wire in the fixed abrasive wire adjacent to the rotational axis A step of forming the grinding portion on the outer peripheral surface by tightly winding the wire so as to be in contact with the wire, and forming the discharge groove by a recess between the fixed abrasive grain wires adjacent to each other in the rotation axis direction.
Provided is a method for manufacturing a grinding wheel, which comprises a step of fixing a first end portion and a second end portion in a longitudinal direction of a fixed abrasive grain wire to a base metal.

Further, according to the present invention, a grinding wheel in which a grinding portion for grinding a work and a discharge groove for discharging chips are formed on the facing surface of the base metal having a facing surface of the work for facing the work. In the manufacturing method, a fixed abrasive grain wire having an end surface on one end side in the rotation axis direction of the base metal as the work facing surface and abrasive grains fixed to a core wire is rotated on the end surface of the base metal. about an axis by winding spirally, on the end face, thereby forming the grinding unit, forming the discharge groove by the recess between the fixed abrasive wire adjacent in the radial direction of the end face, the fixed abrasive A step of fixing the first end and the second end of the grain wire in the longitudinal direction and the intermediate part located between the first end and the second end of the fixed abrasive grain wire to the base metal. A method for manufacturing a grinding wheel is provided, which comprises.

At this time, a step of engraving a guide groove spirally recessed around the rotation axis on the end surface of the base metal and the fixed abrasive grain wire are guided along the length direction of the guide groove. It may include a step to be placed in the groove.

According to the present invention described above, by fixing the fixed abrasive grain wire to the work facing surface facing the work in the base metal, the grinding portion and chips for grinding the work are fixed on the work facing surface of the base metal. A discharge groove for discharge is formed at the same time. Therefore, it is possible to provide a grinding wheel having excellent chip evacuation and improving grinding efficiency, and a method for manufacturing the grinding wheel.

It is a schematic diagram which shows the 1st Embodiment of the grinding wheel which concerns on this invention. It is a schematic perspective view which shows typically the state before work grinding in the grinding wheel. It is a partially enlarged sectional view of the fixed abrasive grain wire wound around the base metal. It is a partially enlarged side view schematically showing the region A surrounded by the alternate long and short dash line in FIG. It is a partially enlarged side view schematically showing the region B surrounded by the alternate long and short dash line in FIG. It is a top view which shows typically the 2nd Embodiment of the grinding wheel which concerns on this invention. FIG. 6 is a partially enlarged cross-sectional view showing an enlarged intermediate portion of the fixed abrasive grain wire fixed to the base metal of FIG. It is a partially enlarged plan view which shows typically the region C surrounded by the alternate long and short dash line of FIG. It is a partially enlarged plan view which shows typically the region D surrounded by the alternate long and short dash line of FIG. It is a top view which shows typically the 3rd Embodiment of the grinding wheel which concerns on this invention. FIG. 5 is a partially enlarged cross-sectional view showing an enlarged intermediate portion of the fixed abrasive grain wire fixed to the base metal of FIG. It is a partially enlarged plan view which shows typically the region E surrounded by the alternate long and short dash line of FIG. It is a partially enlarged plan view which shows typically the region F surrounded by the alternate long and short dash line of FIG.

1 to 5 show a first embodiment of the grinding wheel according to the present invention. The grinding wheel 1A is for grinding a work W such as a metal material or ceramics, and is used for a base metal 2 having a work facing surface facing the work W and a work grinding provided on the work facing surface. It has a grinding unit 3. When grinding the work W with the grinding grindstone 1A, as shown in FIG. 2, the base metal 2 was attached to an appropriate grinding device (not shown) and rotated about the rotation axis L with respect to the base metal 2. Feed is given in this state, and the grinding portion 3 provided on the work grinding surface of the base metal 2 (the outer peripheral surface 2a of the base metal 2 described later) is brought into contact with the work W.

The base metal 2 is formed of a metal such as stainless steel, aluminum, or super steel into a columnar or cylindrical shape and has a circular cross section. In the present embodiment, the work facing surface is the base metal 2. It is composed of a circular outer peripheral surface 2a around the rotation axis L. Further, as shown in FIG. 1 or 2, the base metal 2 is integrally provided with a shaft 4 formed in the shape of a round bar having a smaller diameter than that of the base metal 2. The shaft 4 is a portion clamped by the grinding device. By attaching the base metal 2 to the grinding device via the shaft 4, the base metal 2 can be rotated around the axis L by the driving force of the grinding device and at the same time can be moved in the triaxial direction. The outer diameter of the base metal 2 and the shaft 4 and the length in the L direction of the rotating shaft can be arbitrarily set according to the dimensions of the workpiece to be ground and the like.

Next, a specific configuration of the grinding unit 3, which is a characteristic portion of the present invention, will be described. As shown in FIG. 1 or 2, in the grinding portion 3, the flexible fixed abrasive grain wire 10 described later spirals on the outer peripheral surface 2a of the base metal 2 along the rotation axis L direction. It is formed by being fixed to the base metal 2 in a state of being wound in a shape. Then, the abrasive grains 11 exposed on the surface of the fixed abrasive grain wire 10 serve as a cutting edge, and the work W is ground.

As shown in FIG. 3, the fixed abrasive grain wire 10 used in the grinding wheel 1A includes a metal flexible core wire 12 such as a piano wire and fine particles such as diamond and cubic boron nitride (cBN). Those in which the above-mentioned abrasive grains 11 are fixed in a single layer state (single grain state) are preferably used. At this time, the abrasive grains 11 are fixed to the core wire 12 by an appropriate fixing method. However, when the abrasive grains 11 are fixed to the core wire 12 in a single layer state as in the present embodiment, the abrasive grains 11 are fixed to the core wire 12 in a single layer state. Since the self-generated blade effect of the abrasive grains 11 does not occur, if the abrasive grains 11 are shed, the sharpness at the shedding portion becomes dull.

Therefore, in the present embodiment, by fixing the abrasive grains 11 with the metal plating layer 13 by electrodeposition using a bonding material such as nickel or copper, the holding force of the abrasive grains 11 on the core wire 12 is enhanced. ing. Therefore, it is possible to suppress the shedding of the abrasive grains 11 from the core wire 12 as much as possible and suppress the deterioration of the fixed abrasive grain wire 10, that is, the grinding portion 3, and reduce the frequency of replacement of the grinding wheel 1A and the fixed abrasive grain wire 10. can do.

In the present embodiment, the grinding unit 3 makes one of the fixed abrasive grain wires 10 from one end side of the base metal 2 so as to be along the rotation axis L direction with respect to the outer peripheral surface 2a of the base metal 2. It is configured by continuously winding in a single layer toward the end side. In this way, when the fixed abrasive grain wire 10 is wound around the base metal 2 in a single spiral shape, the cross section of the core wire 12, that is, the cross section of the fixed abrasive grain wire 10 is substantially circular. As shown, recesses 5 are formed between the fixed abrasive grain wires 10 and 10 adjacent to each other in the rotation axis L direction on the outer peripheral surface 2a of the base metal 2.

The recess 5 is formed of a valley-shaped space between adjacent fixed abrasive grain wires 10 and 10, and spirally extends from one end side to the other end side along the rotation axis L direction of the base metal 2. It is continuous. The recess 5 is a discharge groove that enhances the discharge of chips of the work W, similarly to the tip pocket 14 between adjacent abrasive grains 11 and 11 on the outer peripheral surface of the fixed abrasive grain wire 10 when the work W is ground. Functions as.

The winding pitch of the fixed abrasive grain wire 10 is arbitrary, but in the present embodiment, the fixed abrasive grain wire 10 is one of the fixed abrasive grain wires 10 and 10 adjacent to each other in the rotation axis L direction. A state in which the tip end portion (cutting edge portion) of the abrasive grain 11 in the fixed abrasive grain wire 10 is in contact with the other fixed abrasive grain wire 10, that is, the average abrasive particle size of the abrasive grain 11 or the abrasive grain 11 from the metal plating layer 13. It is tightly wound on the outer peripheral surface 2a of the base metal 2 in a state where a gap of about the amount of protrusion is formed (see FIGS. 3 to 5).

The fixed abrasive grain wire 10 has a first end and a second end at both ends in the longitudinal direction (longitudinal direction of the core wire 12). Then, as shown in FIG. 4, the first end portion 10a of the fixed abrasive grain wire 10 is connected to one end side of the base metal 2 in the rotation axis L direction on the outer peripheral surface 2a (that is, the shaft 4 on the outer peripheral surface 2a). The second end 10b of the wire 10 is located on the other end side of the outer peripheral surface 2a (opposite to the base end in the rotation axis L direction) as shown in FIG. It is fixed to the tip side).

On the other hand, the intermediate portion 10c of the fixed abrasive grain wire 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 can move relative to the outer peripheral surface 2a. That is, since the intermediate portion 10c of the wire 10 is not fixed to the base metal 2, it is slightly displaced in the rotation axis L direction or the circumferential direction on the outer peripheral surface 2a of the base metal 2 due to cutting resistance or the like. It is possible to twist the wire 10 slightly around the central axis of the wire 10.

Reference numeral 15 in FIG. 4 is a fixing portion formed by fixing the first end portion 10a of the fixed abrasive grain wire 10 to the base metal 2 by a fixing means such as soldering, brazing, or welding. Further, in FIG. 5, 16 is a fixing portion formed by fixing the second end portion 10b of the fixed abrasive grain wire 10 to the base metal 2 by the fixing means.

When the work W is ground using the grinding wheel 1A, as described above, the grinding wheel 1A is attached to the grinding device via the shaft 4 provided integrally with the base metal 2, and the grinding wheel 1A is attached by the grinding device. Set various grinding conditions related to feed rate, rotation speed, depth of cut with respect to workpiece W, and the like. Then, after setting the grinding conditions, the grinding wheel 1A is fed toward the work W in a state of being rotated around the rotation axis L. Then, the work W and the work facing surface of the base metal 2, that is, the grinding portion 3 made of the fixed abrasive grain wire 10 spirally wound around the outer peripheral surface 2a of the base metal 2, come into contact with each other, and the fixed abrasive grain wire The work W is gradually ground in the feed direction by the abrasive grains 11 exposed on the surface of the 10. At this time, it is desirable that the grinding process using the grinding wheel 1A is a dry process that does not use a grinding fluid, but it is of course possible to perform processing using a grinding fluid depending on the processing conditions.

Chips generated during grinding enter the tip pocket 14 of the fixed abrasive grain wire 10 and serve as a chip discharge groove formed between the fixed abrasive grain wires 10 and 10 adjacent to each other in the L direction of the rotation axis. It also enters the recess 5 of. Then, the chips that have entered the recess 5 are discharged to the outside by the rotation of the grinding wheel 1A. At this time, since the fixed abrasive grain wire 10 is wound around the outer peripheral surface 2a of the base metal 2 along the rotation axis L at substantially uniform intervals, the recess 5 extending in the circumferential direction of the base metal 2 is extended. Is also in a state of being arranged at substantially uniform intervals in the rotation axis L direction of the grinding wheel 1. Therefore, the recess 5 can be uniformly confronted with the work W at any position of the grinding unit 3, whereby chips can be efficiently discharged.

Further, during workpiece W grinding, grinding resistance is generated in the fixed abrasive grain wire 10, but as described above, this wire 10 is an intermediate portion located between the first end portion 10a and the second end portion 10b. In 10c, it is wound so as to be relatively movable with respect to the base metal 2 in a non-fixed state, and due to its grinding resistance, it slightly reciprocates or swings on the outer peripheral surface 2a of the base metal 2. You can do it. Therefore, for example, even if the work W is made of a material that is easily clogged, such as a soft material, the chips can be shaken off from the recess 5 and efficiently discharged.

Subsequently, the process of manufacturing the grinding wheel 1A will be described. First, as described above, a base metal 2 made of a metal material such as stainless steel, aluminum, or super steel and having an outer peripheral surface 2a around the rotation axis L, and a core wire 12 made of a metal material such as a piano wire are made of diamond. A long fixed abrasive wire 10 formed by fixing fine abrasive grains 11 made of or cBN is prepared. Next, by winding the fixed abrasive grain wire 10 around the outer peripheral surface 2a of the base metal 2, a grinding portion 3 for grinding the work W and a recess 5 (discharge groove) for discharging chips are formed. Move to the step.

In this step, the fixed abrasive grain wire 10 is spirally tightened to the outer peripheral surface 2a of the base metal 2 along the axis L direction while applying a predetermined tension to the fixed abrasive grain wire 10. Wind it tightly. Then, by winding the fixed grain wire 10 continuously and densely from one end side to the other end side of the base metal 2 in the rotation axis L direction, the fixed grain wire 10 is further fixed to the outer peripheral surface 2a of the base metal 2. A grinding portion 3 made of an abrasive grain wire 10 is formed. At the same time, a recess 5 (discharge groove) for discharging chips is formed between the fixed abrasive grain wires 10 and 10 adjacent to each other in the L direction of the rotation axis. As a method of winding the fixed abrasive grain wire 10 with respect to the base metal 2, for example, a predetermined winding machine or the like can be used.

Next, both ends of the fixed abrasive grain wire 10 wound around the base metal 2 are cut to form first and second ends at both ends in the longitudinal direction (core wire 12 direction), and the first end portion 10a thereof is formed. Is fixed to one end side of the base metal 2 in the L direction of the rotation axis by an appropriate fixing method such as soldering, brazing, or welding. Further, in the same manner as the first end portion 10a, the second end portion 10b of the wire 10 is fixed to the other end side of the base metal 2 in the rotation axis L direction. As a result, the grinding wheel 1A according to the present embodiment can be obtained.

Further, when removing the fixed abrasive grain wire 10 fixed to the base metal 2, for example, when the fixing means such as soldering is used, the fixed portion can be removed by an appropriate method such as laser heating. it can.
In manufacturing the grinding wheel 1A, for example, the first end portion 10a of the fixed abrasive grain wire 10 is formed by cutting or the like prior to winding the fixed abrasive grain wire 10 around the base metal 2. The wire 10 is fixed to one end side of the base metal 2, and then the wire 10 is spirally wound from one end side to the other end side of the base metal 2, and then the second end portion 10b of the wire 10 is cut or the like. It may be formed and fixed to the other end side of the base metal 2.

As described above, in the first embodiment, the fixed abrasive grain wire 10 in which the abrasive grains 11 are fixed to the core wire 12 is spirally wound around the outer peripheral surface 2a of the base metal 2 along the rotation axis L direction. By fixing to the base metal 2 in this state, a grinding portion 3 for grinding the work W is formed, and at the same time, chips are discharged between the fixed abrasive grain wires 10 and 10 adjacent to each other in the rotation axis L direction. A recess 5 (discharge groove) is also formed. Therefore, it is possible to provide the grinding wheel 1A, which is capable of suppressing clogging of the grindstone due to its excellent chip evacuation and has excellent grinding efficiency, with high productivity and low cost.

When the sharpness of the grinding wheel 1A is lowered, the used fixed abrasive grain wire 10 is removed from the base metal 2, and a new fixed abrasive grain wire 10 is wound around the base metal 2 again to fix the base. It is also possible to reuse the gold 2 without discarding it, and by doing so, the operating cost of the grinding wheel 1 can be suppressed.

The base metal 2 is configured to be attached to the grinding device via the shaft 4, but is not limited to this, and the base metal 2 has a mounting hole penetrating in the thickness direction like a flat grindstone. However, it may be mounted on the spindle of the grinding device through the mounting hole. Further, FIG. 2 shows an example in which the grinding wheel 1 is used for surface grinding, but the present invention is not limited to this, and for example, it may be used for cylindrical grinding or internal grinding. Further, in the above embodiment, the fixed abrasive grain wire 10 is fixed to the outer peripheral surface 2a of the base metal 2 at two points, the first end portion 10a and the second end portion 10b, but in addition, the base metal 2 It may be fixed to the base metal 2 at three or more places including the central portion of the wire 10 wound around the wire 10.

6-9 show a second embodiment of the grinding wheel according to the present invention, and the difference between the grinding wheel 1B of the second embodiment and the grinding wheel 1A of the first embodiment is that the base metal 2 A substantially circular shape in which the work facing surface facing the work W is arranged on one side of the base metal 2 in the rotation axis L direction (the tip end side located on the opposite side of the shaft 4 in the axis L direction). The end face 2b is formed, and a grinding portion 3 for grinding a work and a recess 5 for discharging chips are provided on the end face 2b. The grinding wheel 1B of the second embodiment is mainly used for lapping, and is provided on the end surface 2b by pressing the end surface 2b side of the base metal 2 rotating around the axis L against the work W. The surface of the work W is smoothed by the grinding unit 3.
Since the configurations other than the above are substantially the same as those of the grinding wheel 1A of the first embodiment, the same reference numerals as those of the grinding wheel 1A of the first embodiment are attached to the main same components of both, and these configurations are added. The description of the action and effect based on the part and its constituent parts will be omitted in order to avoid duplicate description.

As shown in FIG. 6 or 7, the end surface 2b of the base metal 2 has a uniformly flat surface, and the fixed abrasive grain wire 10 swirls around the rotation axis L on the end surface 2b. It is fixed in a rolled state. As a result, the grinding portion 3 is formed on the end surface 2b of the base metal 2, and the recess 5 for discharging chips is formed between the fixed abrasive grain wires 10 and 10 adjacent to each other in the radial direction of the base metal 2. Is provided. At this time, the winding pitch of the base metal 2 in the radial direction, the number of windings thereof, the number of wires 10 and the like are arbitrary, but in the present embodiment, one fixed abrasive grain wire 10 is used. It is spirally wound tightly on the end face 2b from the vicinity of the outer peripheral edge to the substantially central position.

As shown in FIGS. 6, 8 and 9, in the grinding wheel 1B, the first end portion 10a of the fixed abrasive grain wire 10 is fixed to the outer peripheral edge side of the end surface 2b of the base metal 2. The second end portion 10b of the fixed abrasive grain wire 10 is fixed at a substantially central position of the end face 2b. On the other hand, the intermediate portion 10c located between the first end portion 10a and the second end portion 10b has a predetermined distance from the end surface 2b along the longitudinal direction of the fixed abrasive grain wire 10. It is fixed intermittently. Therefore, in the intermediate portion 10c, the fixed portion 17 fixed to the end surface 2b of the base metal 2 and the non-fixed portion not fixed to the end surface 2b of the base metal 2 are alternately arranged along the longitudinal direction. It has (see FIGS. 8 and 9). As a result, the non-fixed portion is configured to be displaced or oscillated on the end surface 2b of the base metal 2 due to cutting resistance or the like during grinding of the work W.

As the means for fixing the fixed abrasive grain wire 10 to the base metal 2, soldering, brazing, welding or the like is performed as in the first embodiment. In this embodiment, for example, as shown by reference numeral 17 in FIG. The fixed abrasive grain wire 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 of the fixed abrasive grain wire 10 is located inside the base metal 2 in the radial direction, but may be located outside in the radial direction.
Further, 15 in FIG. 8 shows a fixing portion formed by fixing the first end portion 10a of the fixed abrasive grain wire 10 to the end surface 2b of the base metal 2 at a position near the outer peripheral edge of the end surface 2b by the fixing means. 16 in FIG. 9 is a fixing portion formed by fixing the second end portion 10b to the end face 2b at a substantially center position of the end face 2b by the fixing means.

When manufacturing the grinding wheel 1B of the second embodiment, the base metal 2 and the fixed abrasive grain wire 10 are prepared, and the fixed abrasive grain wire 10 is placed on the end surface 2b of the base metal 2 and the rotating shaft L. It is fixed to the end face 2b while being wound tightly in a spiral shape around it. Here, when winding the fixed abrasive grain wire 10, for example, it is assumed that the fixed abrasive grain wire 10 is wound in a plurality of turns from the outer peripheral edge side to the center side of the base metal 2. In that case, first, the winding start end side (first end portion 10a side) of the fixed abrasive grain wire 10 is fixed to the base metal at a position near the outer peripheral edge of the end surface 2b by a fixing means such as spot welding. To do. Then, the fixed abrasive grain wire 10 is spirally wound toward the center of the end surface 2b and fixed to the base metal 2 at a predetermined interval along the length direction of the fixed abrasive grain wire 10. .. This is repeated in sequence, and finally, the winding end side (second end portion 2b side) of the fixed abrasive grain wire 10 is fixed to the base metal 2 at a substantially central position (near the rotation axis L) of the end surface 2b of the base metal 2. To do. Then, the excess portion between the winding start end side and the winding end side of the fixed abrasive grain wire 10 is cut or the like.

In this way, the fixed abrasive grain wire 10 is spirally fixed to the end surface 2b of the base metal 2, and between the fixed abrasive grain wires 10 and 10 adjacent to the base metal 2 in the radial direction. , A grinding wheel 1B in which a recess 5 for discharging chips is formed can be obtained.
Before the fixing step of the fixed abrasive grain wire 10, both ends of the fixed abrasive grain wire 10 are cut to form a first end portion 10a and a second end portion 10b in advance, and the base metal is formed as described above. It is also possible to fix it to the end face 2b while winding it on the end face 2b of 2. Further, in the above description, the fixed abrasive grain wire 10 is wound from the outer peripheral edge side of the base metal toward the center, but on the contrary, it is also possible to wind the fixed abrasive grain wire 10 from the central side toward the outer peripheral edge side. It is also possible to sequentially weld the fixed abrasive grain wire 10 from the radial outside of the base metal 2.

10-13 show a third embodiment according to the present invention.
The difference between the grinding wheel 1C of the third embodiment and the grinding wheel 1B of the second embodiment is that the end surface 2b forming the work facing surface facing the work W is substantially spirally concave around the rotation axis L. The provided guide groove 20 is provided, and the fixed abrasive grain wire 10 is arranged in the guide groove 20 in a spirally wound state along the guide groove 20, and the guide groove 20 is in that state. It is a point that is fixed to the base metal inside.

The spiral guide groove 20 is continuous from the vicinity of the outer peripheral edge of the end surface 2b of the base metal 2 toward the central portion without a break. Further, as shown in FIG. 11, the guide groove 20 has a substantially rectangular cross-sectional shape, the groove width thereof is formed to be slightly larger than the diameter of the fixed abrasive grain wire 10, and the groove depth thereof. Is shallower than the diameter of the fixed abrasive grain wire 10. Therefore, when the fixed abrasive grain wire 10 is accommodated in the groove 20 along the length direction of the guide groove 20, the substantially arc-shaped surface of the fixed abrasive grain wire 10 becomes the base metal 2 as shown in FIG. The work W can be ground by the fixed abrasive grain wire 10 that protrudes from the end surface 2b and protrudes.

Then, as shown in FIG. 11, also in the grinding wheel 1C according to the third embodiment, the recess 5 for discharging chips is formed between the fixed abrasive grain wires 10 and 10 adjacent to each other in the radial direction of the base metal 2. It is formed.
Further, the winding pitches of the fixed abrasive grain wires 10 and 10 that determine the width of the recess 5 substantially correspond to the radial pitch of the guide groove 20 adjacent to the radial direction of the base metal 2, and this third In the embodiment of the above embodiment, the winding pitch of the guide groove 20 is such that the abrasive grains 11 of the adjacent fixed abrasive grain wires 10 and 10 are not in contact with each other in a state where the fixed abrasive grain wires 10 are housed in the guide groove 20. It is set to be separated to the extent that

In this third embodiment, a resin-based adhesive is used as a means for fixing the fixed abrasive grain wire 10. Then, with the adhesive, as shown in FIG. 12 or 13, the first end portion 10a of the fixed abrasive grain wire 10 is formed at the groove end portion of the guide groove 20 on one end side (outermost outer peripheral side) in the length direction. It is fixed at the position of 20a, and the second end portion 10b is fixed at the position of the groove end portion 20b on the other end side (center side) in the length direction in the guide groove 20. On the other hand, the intermediate portion 10c of the fixed abrasive grain wire is intermittently fixed to the base metal 2 along the length direction of the fixed abrasive grain wire 10 in the guide groove 20.

As the adhesive, for example, an adhesive that forms a flexible adhesive layer that has the ability to follow deformation when cured is used, so that the work W is fixed by its contact resistance or the like during grinding. The fixed portion 15-17 of the abrasive grain wire 10 may be configured to be slightly displaced on the end face 2b while being fixed to the end face 2b.
Further, in the example shown in FIG. 11, the fixed abrasive grain wire 10 is fixed to the base metal 2 in a non-contact state with the groove bottom of the guide groove 20, but the guide groove is in contact with the groove bottom. It may be fixed within 20.

The process of manufacturing the grinding wheel 1C shown in the third embodiment will be described.
In the case of manufacturing the grinding wheel 1C, first, before fixing the fixed abrasive grain wire 10 to the base metal 2, the end face 2b of the base metal 2 is swirled around the rotation axis L of the base metal 2. A shaped guide groove 20 is carved. The step of forming the guide groove 20 is performed by, for example, a laser processing machine or the like, whereby spiral grooves having an appropriate groove width and groove depth are formed at a predetermined winding pitch. After that, in the guide groove 20, the groove end portion 20a on the one end side located on the outermost peripheral side and the groove end portion 20b on the other end side located on the innermost peripheral side are filled with a resin-based adhesive and these. Between the end portions 20a and 20b of both grooves, the adhesive is intermittently filled with a predetermined interval along the longitudinal direction of the guide groove 20. By doing so, an adhesive layer (a portion of the fixing portion 15-17) is formed in the portion of the guide groove 20 filled with the adhesive. Then, the process proceeds to the fixing step described below. At that time, the fixed abrasive grain wire 10 is placed along the length direction of the guide groove 20 before the adhesive layer is completely cured. Place inside.

Here, a fixed abrasive grain wire 10 which is formed to have a length corresponding to the length of the guide groove and has a first end portion 10a and a second end portion 10b in advance is used, but of course, the first 2 As described in the manufacturing process of the grinding wheel 1B of the embodiment, after fixing the long fixed abrasive grain wire 10 to the base metal 2 (inside the guide groove 20), both ends of the fixed abrasive grain wire 10 are cut. The first end portion 10a and the second end portion 10b may be formed.

In the step of fixing the fixed abrasive grain wire 10 to the base metal 2, for example, as shown in FIG. 12, the first end portion 10a of the fixed abrasive grain wire 10 is combined with the groove end portion 20a on one end side of the guide groove 20. In that state, the fixed abrasive grain wire 10 is spirally wound along the length direction of the guide groove 20, and as shown in FIG. 13, the second end of the fixed abrasive grain wire 10 is wound. The portion 10b is arranged so as to substantially coincide with the other groove end portion 20b of the guide groove 20. In this way, the fixed abrasive grain wire 10 is spirally fixed to the end surface 2b of the base metal 2, and between the fixed abrasive grain wires 10 and 10 adjacent to the base metal 2 in the radial direction. , A grinding wheel 1C in which a recess 5 for discharging chips is formed can be obtained.

In the third embodiment, the guide groove 20 is formed by a laser processing machine, but it may be formed by cutting with, for example, a cutting tool of a cutting tool. Further, regarding the cross-sectional shape of the guide groove 20, a part of the fixed abrasive grain wire 10 may be accommodated in the guide groove 20, and a part of the outer peripheral surface of the fixed abrasive grain wire 10 may be projected to the outside. If possible, for example, it may have a substantially circular cross section or a substantially V-shaped cross section.

Although the grinding wheel and the manufacturing method thereof according to the present invention have been described above, the present invention is not limited to the above-described embodiment, and various design changes can be made without departing from the scope of claims. Needless to say, there is.

1A, 1B, 1C Grinding wheel 2 Base metal 2a Outer peripheral surface 2b End surface 3 Grinding part 5 Recessed part 10 Fixed abrasive grain wire 10a First end part 10b Second end part 10c Intermediate part 11 Abrasive grain 12 Core wire 20 Guide groove W work

Claims (8)

It has a base metal having a work facing surface for facing the work, and a fixed abrasive wire having a large number of abrasive grains fixed to the core wire.
The work facing surface is formed of an outer peripheral surface around the rotation axis of the base metal.
The fixed abrasive wire is spirally wound along the rotation axis direction on the outer peripheral surface of the base metal, and one of the fixed abrasive wires adjacent to each other in the rotation axis direction is one fixed abrasive wire. The tip of the abrasive grain is tightly wound so as to be in contact with the other fixed abrasive grain wire and fixed to the base metal, whereby a grinding portion for workpiece grinding is formed on the outer peripheral surface of the base metal. The grinding wheel is characterized in that a discharge groove for discharging chips is formed formed by recesses between fixed abrasive grain wires adjacent to each other in the direction of the rotation axis . In the grinding wheel according to claim 1 ,
The fixed abrasive grain wire has a first end and a second end at both ends in the longitudinal direction, and the first end is fixed to one end side in the rotation axis direction of the base metal, and the second end thereof. The portion is fixed to the other end side of the base metal in the direction of the rotation axis, and the intermediate portion located between the first end portion and the second end portion is formed with respect to the outer peripheral surface of the base metal. It is characterized in that it is wound so as to be relatively movable in the direction of the rotation axis in a non-fixed state. It has a base metal having a work facing surface for facing the work, and a fixed abrasive wire having a large number of abrasive grains fixed to the core wire.
The work facing surface of the base metal is formed of an end surface on one end side in the rotation axis direction of the base metal, and the fixed abrasive grain wire is spirally wound around the rotation axis on the end surface of the base metal. It is fixed to the base metal in a state of being fixed, whereby a grinding portion for workpiece grinding is formed on the end face of the base metal, and between fixed abrasive wire wires adjacent to each other in the radial direction of the base metal. A grinding wheel characterized in that a discharge groove for discharging chips is formed, which is composed of recesses. In the grinding wheel according to claim 3 ,
The fixed abrasive wire has, at its longitudinal ends have a first end and a second end, respectively, the first end is fixed in the radial direction on one side of an end face of a base alloy that its second end parts with is fixed in the radial direction other side of the該台gold, an intermediate portion positioned between these first and second ends is, in respect to the end face of the base metal, the fixed abrasive wire It is characterized in that it is intermittently fixed along the longitudinal direction of the. In the grinding wheel according to claim 3 or 4 ,
A spirally recessed guide groove is engraved on the end surface of the base metal, and the fixed abrasive grain wire is arranged in the guide groove along the length direction of the guide groove. It is characterized in that it is fixed to the base metal in a state. A method for manufacturing a grinding wheel in which a grinding portion for grinding a work and a discharge groove for discharging chips are formed on the surface facing the work of a base metal having a surface facing the work for facing the work.
A fixed abrasive grain wire formed by fixing abrasive grains to the core wire with the outer peripheral surface around the rotation axis of the base metal as the work facing surface is placed on the outer peripheral surface of the base metal from one end side in the rotation axis direction. and it had wound helically towards the end side, and densely as abrasive grains of the tip of one of the fixed abrasive wire in the fixed abrasive wire adjacent to the rotation axis direction is in contact with the other fixed abrasive wire By winding , the ground portion is formed on the outer peripheral surface, and the discharge groove is formed by the recesses between the fixed abrasive wire adjacent to each other in the rotation axis direction.
A method for manufacturing a grinding wheel, which comprises a step of fixing a first end portion and a second end portion in a longitudinal direction of a fixed abrasive grain wire to a base metal. A method for manufacturing a grinding wheel in which a grinding portion for grinding a work and a discharge groove for discharging chips are formed on the surface facing the work of a base metal having a surface facing the work for facing the work.
A fixed abrasive grain wire having an end surface on one end side in the rotation axis direction of the base metal as the work facing surface and abrasive grains fixed to the core wire is spirally formed around the rotation axis on the end surface of the base metal. By winding , the grinding portion is formed on the end face, and the discharge groove is formed by the recesses between the fixed abrasive grain wires adjacent to each other in the radial direction of the end face.
A step of fixing the first and second ends of the fixed abrasive wire in the longitudinal direction and the intermediate portion located between the first end and the second end of the fixed abrasive wire to the base metal. A method for manufacturing a grinding wheel, which comprises. In the method for manufacturing a grinding wheel according to claim 7 ,
A step of engraving a guide groove recessed in a spiral shape around the rotation axis, and
It is characterized by including a step of arranging the fixed abrasive grain wire in the guide groove along the length direction of the guide groove.

Images