WO2018047600A1

WO2018047600A1 - Grinding stone and production method therefor

Info

Publication number: WO2018047600A1
Application number: PCT/JP2017/029594
Authority: WO
Inventors: 鈴木孝彰; 西野雄紀; 植田康弘
Original assignee: 株式会社リード
Priority date: 2016-09-06
Filing date: 2017-08-18
Publication date: 2018-03-15
Also published as: JP2018039066A; TW201819113A; KR20190044063A; TWI705875B; JP6755550B2; CN109789533A

Abstract

[Problem] To provide a grinding stone with excellent ability to discharge swarf and with which grinding efficiency can be improved, and a production method for such a grinding stone. [Solution] The grinding stone has a metal base 2 with a workpiece-facing surface that faces a workpiece W and a fixed abrasive grain wire 10 made by fixing many abrasive grains 11 on a core wire 12. Fixing the fixed abrasive grain wire 10 on the workpiece-facing surface of the metal base 2 forms a grinding section 3 for workpiece grinding on the workpiece-facing surface and forms discharging grooves for discharging swarf that are constituted from the crevices 5 between adjacent fixed abrasive grain wires 10 and 10.

Description

Grinding wheel and method of manufacturing the same

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

Conventionally, as a grinding wheel for grinding a workpiece made of a metal material, a ceramic material or the like, for example, a base metal having a workpiece facing surface facing the workpiece, and abrasive grains such as diamond or cBN on the workpiece facing surface are suitable. It is known to have an abrasive layer or grinding layer held by a bonding material (see Patent Document 1). Then, when grinding a work using such a grinding wheel, the grinding wheel is attached to a suitable grinding device, and the base metal is fed at a high speed while rotating around its axis to feed it toward the work, The grinding layer disposed on the workpiece facing surface of the base metal is brought into contact with the workpiece. 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 a workpiece are accumulated in chip pockets between abrasive grains, which may cause clogging, and as a result, the grinding efficiency may be reduced. There is. Therefore, in such a grinding wheel, it is preferable that a discharge groove for chip discharge is provided in the grinding layer to enhance chip dischargeability, and the chips are discharged to the outside through the discharge groove.
In addition, as a prior art document relevant to this invention, a thing like patent document 2 is mentioned, for example.

JP, 2010-46771, A Japanese Patent Application Laid-Open No. 63-283865

Then, the technical subject of this invention is excellent in the discharge | emission property of chips, and is providing the grinding wheel which can aim at the improvement of grinding efficiency, and the manufacturing method of such a grinding wheel.

In order to solve the above problems, according to the present invention, it has a base metal having a workpiece facing surface for facing a workpiece, and a fixed abrasive wire in which a large number of abrasive grains are fixed to a core wire, The abrasive wire is fixed so as to extend adjacent to the workpiece facing surface of the base metal, whereby a grinding portion for workpiece grinding is formed on the workpiece facing surface, and adjacent fixed abrasive particles are formed. There is provided a grinding wheel characterized in that a discharge groove for chip discharge, which is a recess between wires, is formed.

At this time, preferably, the workpiece-facing surface of the base metal is formed of an outer peripheral surface around the rotation axis of the base metal, and the fixed abrasive wire is formed on the outer peripheral surface of the base metal along the rotational axis direction. Between the fixed abrasive wire which is fixed to the base metal in a spirally wound state, whereby the grinding portion is formed on the outer peripheral surface of the base metal and adjacent to the rotation axis direction. The discharge groove is formed by the concave portion of
And, more preferably, the fixed abrasive 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 of the base metal in the rotation axis direction The second end is fixed to the other end side of the base metal in the direction of the rotation axis of the base metal, and the intermediate part located between the first end and the second end is the base metal. Relative to the outer peripheral surface, it is wound so as to be capable of relative movement in the direction of the rotation axis in a non-sticking state.

In the grinding wheel according to the present invention, the work-facing surface of the base metal is an end face on one end side in the rotation axis direction of the base metal, and the fixed abrasive wire is on the end face of the base metal. Wherein the grinding portion is formed on the end face of the base metal, and the radial direction of the base metal is fixed to the base metal in a spirally wound state around the rotation axis. The said discharge groove may be formed of the recessed part between the fixed abrasive wires which adjoin each other.

At this time, preferably, the fixed abrasive wire has a first end and a second end at both ends in the longitudinal direction, and the first end is on one side in the radial direction of the end face of the base metal. An intermediate portion which is fixed, the second end is fixed on the other side in the radial direction of the base metal, and an intermediate portion located between the first end and the second end is opposed to the end face of the base metal. , And fixed intermittently along the longitudinal direction of the fixed abrasive wire.

Further, a spirally recessed guide groove is engraved on the end face of the base metal, and the fixed abrasive wire is disposed in the guide groove along the longitudinal direction of the guide groove. It may be fixed to the base metal in a fixed state.

Furthermore, according to the present invention, a grinding wheel in which a grinding portion for grinding a workpiece and a discharge groove for discharging chips are formed on the workpiece-facing surface of a base metal having a workpiece-facing surface for facing a workpiece. In the manufacturing method, a fixed abrasive wire having an outer peripheral surface around the rotation axis of the base metal as the work-facing surface, and a fixed abrasive wire having abrasive grains fixed to the core wire is formed on the outer peripheral surface of the base metal in the rotational axis direction. The grinding portion is formed on the outer peripheral surface by spirally winding from one end side to the other end side, and the discharge groove is formed by the concave portion between the fixed abrasive wires adjacent in the rotation axis direction. A method of manufacturing a grinding wheel is provided comprising the steps of forming and securing the first end and the second end in the longitudinal direction of the fixed abrasive wire to the base metal.

Further, according to the present invention, there is provided a method of manufacturing a grinding stone in which a grinding portion for grinding a workpiece and a discharge groove for discharging chips are formed on the workpiece-facing surface of a base metal having a workpiece-facing surface facing a workpiece. The fixed abrasive wire having an end face on one end side in the rotation axis direction of the base metal as the work-facing surface and the abrasive grains fixed to the core wire is placed on the end face of the base metal around its rotation axis. Forming the grinding portion on the end face by spirally winding, and forming the discharge groove by the recess between the fixed abrasive wires adjacent to each other in the radial direction of the end face; Securing the first end and the second end in the longitudinal direction and an intermediate portion located between the first end and the second end of the fixed abrasive wire to the base metal. A method of manufacturing a grinding wheel characterized by the present invention is provided.

At this time, in the end face of the base metal, a step of engrave a guide groove recessed in a spiral manner around the rotation axis, and the fixed abrasive wire along the length direction of the guide groove. And disposing in the groove.

According to the present invention described above, the fixed abrasive wire is fixed to the workpiece facing surface facing the workpiece in the base metal, whereby the grinding portion and chips for grinding the workpiece on the workpiece facing surface of the base metal A discharge groove for discharge is simultaneously formed. Therefore, it is possible to provide a grinding wheel which is excellent in chip dischargeability and can improve the grinding efficiency, and a method of manufacturing the grinding wheel.

It is a schematic diagram which shows 1st Embodiment of the grinding stone which concerns on this invention. It is a schematic perspective view which shows typically the state before work grinding in the above-mentioned grinding wheel. It is a partial expanded sectional view of the fixed abrasive wire wound by base metal. FIG. 2 is a partial enlarged side view schematically showing an area A surrounded by an alternate long and short dash line in FIG. FIG. 2 is a partial enlarged side view schematically showing a region B surrounded by an alternate long and short dash line in FIG. 1. It is a top view which shows typically 2nd Embodiment of the grinding stone which concerns on this invention. FIG. 7 is a partially enlarged cross-sectional view showing an intermediate portion of the fixed abrasive wire fixed to the base metal of FIG. 6 in an enlarged manner. FIG. 7 is a partial enlarged plan view schematically showing a region C surrounded by an alternate long and short dash line in FIG. 6. FIG. 7 is a partial enlarged plan view schematically showing a region D surrounded by an alternate long and short dash line in FIG. 6. It is a top view which shows typically 3rd Embodiment of the grinding stone which concerns on this invention. FIG. 11 is a partially enlarged cross-sectional view showing an intermediate portion of the fixed abrasive wire fixed to the base metal of FIG. 10 in an enlarged manner. FIG. 11 is a partial enlarged plan view schematically showing an area E surrounded by an alternate long and short dash line in FIG. 10. FIG. 11 is a partial enlarged plan view schematically showing a region F surrounded by an alternate long and short dash line in FIG. 10.

1 to 5 show a first embodiment of a grinding wheel according to the present invention. The grinding wheel 1A is for grinding a workpiece W such as a metal material or a ceramic, and the base metal 2 having a workpiece facing surface facing the workpiece W, and the workpiece grinding surface provided on the workpiece facing surface And a grinding unit 3. When grinding the work W with this grinding wheel 1A, as shown in FIG. 2, the base metal 2 was attached to a suitable grinding device (not shown) and was rotated about its rotation axis L with respect to the base metal 2 Feeding is performed in a 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 in a cylindrical or cylindrical shape and formed in a circular cross-section, for example, by a metal such as stainless steel, aluminum, super steel, etc. In the present embodiment, the work opposing surface is the base metal. It comprises 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 a round rod shape smaller in diameter than that. The shaft 4 is a portion to be clamped by the grinding device. The base metal 2 is attached to the grinding apparatus through the shaft 4 so that it can rotate in the three axial directions while rotating about the axis L by the driving force of the grinding apparatus. The outer diameters of the base metal 2 and the shaft 4 and the lengths in the direction of the rotation axis L can be arbitrarily set in accordance with the dimensions of the workpiece to be ground.

Next, a specific configuration of the grinding unit 3 which is a feature of the present invention will be described. As shown in FIG. 1 or FIG. 2, in the grinding portion 3, the fixed abrasive wire 10 having flexibility described later spirals along the direction of the rotation axis L on the outer peripheral surface 2 a of the base metal 2. It is formed by being fixed to the base metal 2 in a wound state. And the abrasive grain 11 exposed to the surface of the fixed abrasive wire 10 becomes a cutting blade, and the said workpiece | work W is ground.

As shown in FIG. 3, as the fixed abrasive wire 10 used for the grinding wheel 1A, fine wires such as diamond or cubic boron nitride (cBN) can be used as the core wire 12 made of metal such as piano wire and having flexibility. Preferably, the abrasive grains 11 are fixed in a single layer state (single particle state). At this time, fixing of the abrasive grains 11 to the core wire 12 is performed by an appropriate fixing method, but when the abrasive grains 11 are fixed in a single layer state on the core wire 12 as in the present embodiment, Since the spontaneous growth effect of the abrasive grains 11 does not occur, when the abrasive grains 11 are disintegrated, the sharpness in the disaggregated 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 and copper, the retention strength of the abrasive grains 11 to the core wire 12 is enhanced. ing. Therefore, it is possible to suppress the dropout of the abrasive grains 11 from the core wire 12 as much as possible and to suppress the deterioration of the fixed abrasive wire 10, that is, the grinding portion 3 and reduce the replacement frequency of the grinding wheel 1A and the fixed abrasive wire 10 can do.

In the present embodiment, the grinding unit 3 is arranged so that one fixed abrasive wire 10 extends from the one end side of the base metal 2 along the rotation axis L direction with respect to the outer peripheral surface 2 a of the base metal 2. It is configured by continuously winding in a single layer toward the end side. Thus, when the fixed abrasive wire 10 is wound in a single spiral shape with respect to the base metal 2, the cross section of the core wire 12, that is, the cross section of the fixed abrasive wire 10 is substantially circular, as shown in FIG. As shown, a recess 5 is formed on the outer peripheral surface 2a of the base metal 2 between the fixed

abrasive wires

10, 10 adjacent to each other in the direction of the rotation axis L.

The concave portion 5 is formed of a valley-like space between the adjacent fixed

abrasive wires

10 and 10, and is spirally formed from one end side to the other end side along the rotation axis L direction of the base metal 2 It is continuous. The above-mentioned recessed part 5 is a discharge groove which improves the dischargeability of the chips of the work W in the same manner as the chip pocket 14 between the adjacent

abrasive grains

11 and 11 on the outer peripheral surface of the fixed abrasive wire 10 when grinding the work W. Act as.

In addition, although the winding pitch of the said fixed abrasive wire 10 is arbitrary, in this embodiment, this fixed abrasive wire 10 is one in fixed

abrasive wire

10 and 10 comrades which adjoin in the rotating shaft L direction. A state in which the tip portion (edge portion) of the abrasive grain 11 in the fixed abrasive wire 10 is in contact with the other fixed abrasive wire 10, that is, the average abrasive grain diameter of the abrasive grain 11 or the abrasive grain 11 from the metal plating layer 13 In a state in which a gap of about the amount of protrusion is formed, it is tightly wound on the outer peripheral surface 2a of the base metal 2 (see FIGS. 3 to 5).

The fixed abrasive 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 10 a of the fixed abrasive wire 10 is connected to one end side of the outer peripheral surface 2 a of the base metal 2 in the rotational axis L direction (that is, the shaft 4 in the outer peripheral surface 2 a is connected And the second end 10b of the wire 10 is positioned on the other end side of the outer peripheral surface 2a (opposite to the base in the rotational axis L direction) (as shown in FIG. 5). Fixed to the tip end side).

On the other hand, the intermediate portion 10 c of the fixed abrasive wire 10 located between the first end 10 a and the second end 10 b is wound in a non-adherent state with respect to the outer peripheral surface 2 a 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. Or it can be slightly twisted around the central axis of the wire 10.

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

When the workpiece 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 Various grinding conditions relating to the feed speed, the number of rotations, the cut amount to the workpiece W, etc. are set. Then, after setting the grinding conditions, the grinding wheel 1A is rotated about the rotation axis L to feed the workpiece W toward the work W. Then, the workpiece W and the grinding portion 3 composed of the fixed abrasive wire 10 spirally wound around the workpiece facing surface of the base metal 2, that is, the outer peripheral surface 2a of the base metal 2 are in contact with each other. The workpiece W is gradually ground in the feed direction by the abrasive grains 11 exposed on the surface of the surface 10. At this time, although it is desirable that the grinding process using this grinding wheel 1A is a dry process that does not use a grinding fluid, it is of course possible to work using a grinding fluid according to the processing conditions.

Chips generated during grinding enter into the above-mentioned chip pockets 14 of the fixed abrasive wire 10 and are formed as discharge grooves for chips formed between the fixed

abrasive wires

10, 10 adjacent in the direction of the rotation axis L. Into the recess 5 of the 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 wire 10 is wound along the rotation axis L at substantially uniform intervals on the outer peripheral surface 2 a of the base metal 2, the recessed portion 5 extended in the circumferential direction of the base metal 2 Also, they are in a state of being disposed at substantially uniform intervals in the direction of the rotation axis L of the grinding wheel 1. Therefore, the concave portion 5 can be uniformly opposed to the workpiece W at any position of the grinding portion 3, whereby the chips can be discharged efficiently.

Also, when grinding the workpiece W, grinding resistance is generated in the fixed abrasive wire 10, but as described above, this wire 10 is an intermediate portion located between the first end 10a and the second end 10b. 10c, the base metal 2 is wound so as to be able to move relative to the base metal 2 in a non-sticking state, and due to its grinding resistance, it slightly displaces or reciprocates or oscillates on the outer peripheral surface 2a of the base metal 2. It is possible to Therefore, for example, even if the workpiece W is made of a clogged material such as a soft material, the chips can be shaken off from the recess 5 and efficiently discharged.

Then, the process of manufacturing the said grinding stone 1A is demonstrated. First, for the base metal 2 made of a metal material such as stainless steel, aluminum or super steel as described above and having the outer peripheral surface 2a around the rotation axis L and the core wire 12 made of a metal material such as a piano wire A long fixed-abrasive wire 10 is prepared, in which fine abrasive grains 11 made of or cBN are fixed. Next, the fixed abrasive wire 10 is wound around the outer peripheral surface 2a of the base metal 2 to form a grinding portion 3 for grinding the work W and a recess 5 (discharge groove) for chip discharge. Move to the step.

In this step, while the fixed abrasive wire 10 is under a predetermined tension, the fixed abrasive wire 10 is spirally tightened to the outer peripheral surface 2 a of the base metal 2 along the axis L direction. Tightly wound in the shape. Then, the fixed particle wire 10 is continuously and densely wound from the one end side to the other end side of the base metal 2 in the rotation axis L direction, so that one layer is fixed to the outer peripheral surface 2a of the base metal 2 A grinding portion 3 composed of abrasive wire 10 is formed. At the same time, a recess 5 (discharge groove) for chip discharge is formed between the fixed

abrasive wires

10, 10 adjacent to each other in the rotational axis L direction. In addition, as a winding method of the fixed abrasive wire 10 with respect to the base metal 2, it can carry out by using a predetermined | prescribed winding machine etc., for example.

Then, both ends of the fixed abrasive wire 10 wound around the base metal 2 are cut or the like to form a first end and a second end at both ends in the longitudinal direction (core 12 direction), and the first end 10a Is fixed to one end side of the base metal 2 in the rotation axis L direction by an appropriate fixing method such as soldering, brazing, welding and the like. Further, in the same manner as the first end 10a, the second end 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 in the present embodiment can be obtained.

In addition, when the fixed abrasive wire 10 fixed to the base metal 2 is removed, for example, when a fixing means such as the above-described soldering is used, the fixed portion may be removed by an appropriate method such as laser heating. it can.
When manufacturing the grinding wheel 1A, for example, prior to winding the fixed abrasive wire 10 on the base metal 2, the first end 10a of the fixed abrasive wire 10 is formed by cutting or the like. 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 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 wire 10 in which the abrasive grains 11 are fixed to the core wire 12 is spirally wound around the outer peripheral surface 2 a of the base metal 2 along the rotation axis L direction. By fixing to the base metal 2 in the state, the grinding portion 3 for grinding the workpiece W is formed, and at the same time, between the fixed

abrasive wires

10 and 10 adjacent in the direction of the rotation axis L, for discharging chips. The recess 5 (discharge groove) is also formed. Therefore, it is possible to suppress the clogging of the grindstone by the excellent chip discharge property, and it is possible to provide the grinding grindstone 1A excellent in grinding efficiency at high productivity and at low cost.

Also, when the sharpness of the grinding wheel 1A decreases, remove the used fixed abrasive wire 10 from the base metal 2 and wind and fix the new fixed abrasive wire 10 around the base metal 2 again. It is also possible to reuse the gold 2 without discarding it, and by doing so, the operation cost of the grinding stone 1 can also be suppressed.

In addition, although the said base metal 2 is comprised so that it may be attached to a grinding apparatus via the shaft 4, it does not restrict to this, It is a base metal which has the attachment hole penetrated in thickness direction like a flat grindstone. It may be such that it is mounted on the spindle in the grinding apparatus via the mounting hole. Moreover, although the example which the said grinding stone 1 uses for surface grinding process is shown in FIG. 2, you may use not only this but for example, cylindrical grinding process or internal surface grinding process. Furthermore, in the above embodiment, the fixed abrasive wire 10 is fixed to the outer peripheral surface 2a of the base metal 2 at two points of the first end 10a and the second end 10b. It may be fixed to the base metal 2 at three or more locations including the central portion of the wire 10 wound around.

6 to 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 is used. The workpiece facing surface facing the workpiece W in this case is a substantially circular shape disposed on one side in the direction of the rotation axis L of the base metal 2 (the tip side located opposite to the shaft 4 in the axis L direction). The end face 2b is a point where the grinding portion 3 for grinding the work and the recess 5 for chip discharge are provided on the end face 2b. The grinding wheel 1B of the second embodiment is mainly used when performing lapping, and is provided on the end face 2b by pressing the end face 2b side of the base metal 2 rotating about the axis L against the work W The surface of the workpiece W is smoothed by the grinding portion 3.
The remaining structure is substantially the same as that of the grinding wheel 1A according to the first embodiment, so the same reference numerals as those of the grinding wheel 1A according to the first embodiment are attached to the same main components. The description of the effects based on the parts and their constituent parts is omitted to avoid redundant description.

As shown in FIG. 6 or 7, the end face 2b of the base metal 2 has a uniformly flat surface, and the fixed abrasive wire 10 spirals around the rotation axis L on the end face 2b. It is fixed in a state of being wound in a shape. As a result, the grinding portion 3 is formed on the end face 2 b of the base metal 2, and the recess 5 for discharging chips between the fixed

abrasive wires

10 and 10 adjacent in the radial direction of the base metal 2. Is provided. At this time, the winding pitch in the radial direction of the base metal 2 and the number of turns thereof, the number of wires 10, etc. are arbitrary, but in the present embodiment, one fixed abrasive wire 10 is used. It is closely wound in a spiral manner from the vicinity of the outer peripheral edge to the substantially central position on the end face 2b.

As shown in FIGS. 6, 8 and 9, in the grinding wheel 1B, the first end 10a of the fixed abrasive wire 10 is fixed to the outer peripheral edge side of the end face 2b of the base metal 2, The second end 10b of the fixed abrasive 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 10a and the second end 10b has a predetermined distance from the end face 2b along the longitudinal direction of the fixed abrasive 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. (See FIGS. 8 and 9). As a result, the non-sticking portion is configured to be displaced or rocked on the end face 2 b of the base metal 2 due to cutting resistance or the like in the grinding process of the workpiece W.

The fixing means of the fixed abrasive wire 10 to the base metal 2 is performed by soldering, brazing, welding or the like as in the first embodiment, and in the present embodiment, as shown by reference numeral 17 in FIG. The fixed abrasive wire 10 is point-joined by spot welding such as resistance welding, laser welding, or arc welding. In addition, in the example shown in FIG. 7, although each fixed part 17 of the fixed abrasive wire 10 is located in the radial direction inner side of the base metal 2, you may be located in the radial direction outer side.
Further, 15 in FIG. 8 is a fixed portion formed by fixing the first end 10a of the fixed abrasive wire 10 to the end face 2b of the base metal 2 at the position near the outer peripheral edge of the end face 2b by the fixing means. And 16 in FIG. 9 is a fixing portion formed by fixing the second end 10b to the end face 2b at the approximate 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 wire 10 are prepared, and the fixed abrasive wire 10 is placed on the end face 2b of the base 2 and the rotation axis L It fixes with respect to this end surface 2b, winding tightly around spirally. Here, in winding the fixed abrasive wire 10, for example, it is assumed that the fixed abrasive wire 10 is wound from the outer peripheral edge side of the base metal 2 toward the center side a plurality of times. In that case, first, the winding start end side (first end portion 10a side) of the fixed abrasive wire 10 is fixed to the base metal by fixing means such as spot welding at a position near the outer peripheral edge of the end face 2b. Do. Then, while the fixed abrasive wire 10 is spirally wound toward the center of the end face 2b, the fixed abrasive wire 10 is fixed to the base metal 2 at a predetermined interval along the length direction of the fixed abrasive wire 10. . This is sequentially repeated, and finally, the winding end side (second end portion 2b side) of the fixed abrasive 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. Do. Then, in the fixed abrasive wire 10, excess portions on the winding start end side and the winding end side are cut or the like.

Thus, the fixed abrasive wire 10 is spirally fixed to the end face 2 b of the base metal 2, and between the fixed

abrasive wires

10, 10 adjacent in the radial direction of the base metal 2. Thus, it is possible to obtain a grinding wheel 1B in which the recess 5 for chip discharge is formed.
In addition, before the fixing step of the fixed abrasive wire 10, both ends of the fixed abrasive wire 10 are cut to form the first end 10a and the second end 10b in advance, and they are used as a base metal as described above. It is also possible to fix to the end face 2b while winding it on the end face 2b. In the above description, the fixed abrasive wire 10 is wound from the outer peripheral edge side of the base metal toward the center, but it is of course possible to wind from the central side toward the outer peripheral edge side. It is also possible to weld the fixed abrasive wire 10 sequentially from the outer side of the base metal 2 in the radial direction.

10 to 13 show a third embodiment according to the present invention.
The grinding wheel 1C according to the third embodiment differs from the grinding wheel 1B according to the second embodiment in that the end face 2b forming a workpiece-facing surface facing the workpiece W is recessed substantially spirally around the rotation axis L. A guide groove 20 is provided, and the fixed abrasive wire 10 is disposed in the guide groove 20 in a spirally wound state along the guide groove 20, and the guide groove 20 is in this state. It is a point fixed to the base metal inside.

The spiral guide groove 20 continues without break from the vicinity of the outer peripheral edge to the central portion of the end face 2 b of the base metal 2. Further, as shown in FIG. 11, the guide groove 20 has a substantially rectangular cross-sectional shape, and the groove width is formed to be slightly larger than the diameter of the fixed abrasive wire 10, and the groove depth Is shallower than the diameter of the fixed abrasive wire 10. Therefore, when the fixed abrasive wire 10 is accommodated in the groove 20 along the longitudinal direction of the guide groove 20, the substantially arc-shaped surface of the fixed abrasive wire 10 is made of the above-mentioned base metal 2 as shown in FIG. The workpiece W can be ground by the fixed abrasive wire 10 protruding from the end face 2 b and protruding therefrom.

And as shown in FIG. 11, also in the grinding stone 1C according to the third embodiment, the recess 5 for chip discharge is between the fixed

abrasive wires

10, 10 adjacent to each other in the radial direction of the base metal 2. It is formed.
Further, the winding pitch of the fixed

abrasive wire

10, 10 for determining the width of the recess 5 substantially corresponds to the radial pitch of the guide groove 20 adjacent in the radial direction of the base metal 2; In the embodiment, the winding pitch of the guide groove 20 is such that the abrasive grains 11 of the adjacent fixed

abrasive wires

10, 10 do not contact each other with the fixed abrasive wire 10 accommodated in the guide groove 20. It is set to be separated to such an extent that

In the third embodiment, a resin adhesive is used as a fixing means of the fixed abrasive wire 10. Then, with the adhesive, as shown in FIG. 12 or FIG. 13, the first end 10 a of the fixed abrasive wire 10 is a groove end at one end side (the outermost side) in the length direction in the guide groove 20. The second end 10b is fixed at the position 20a, and is fixed at the position of the groove end 20b on the other end side (central side) of the guide groove 20 in the longitudinal direction. On the other hand, the middle portion 10 c of the fixed abrasive wire is fixed to the base metal 2 intermittently along the length direction of the fixed abrasive wire 10 in the guide groove 20.

In addition, as the above-mentioned adhesive agent, when it hardens, for example, in the case of grinding processing of work W, it fixes by the contact resistance etc. by using the thing which forms the flexible adhesive bond layer which has conformity to modification. The fixed portion 15-17 of the abrasive 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 wire 10 is fixed to the base metal 2 in a non-contact state at 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.

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

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

In the step of fixing the fixed abrasive wire 10 to the base metal 2, for example, as shown in FIG. 12, the first end 10 a of the fixed abrasive wire 10 and the groove end 20 a on one end side of the guide groove 20 In substantially the same state, the fixed abrasive wire 10 is spirally wound along the longitudinal direction of the guide groove 20, and as shown in FIG. 13, the second end of the fixed abrasive wire 10 The portion 10 b is disposed so as to substantially coincide with the other groove end 20 b of the guide groove 20. Thus, the fixed abrasive wire 10 is spirally fixed to the end face 2 b of the base metal 2, and between the fixed

abrasive wires

10, 10 adjacent in the radial direction of the base metal 2. Thus, it is possible to obtain a grinding wheel 1C in which the recess 5 for chip discharge is formed.

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

As mentioned above, although the grinding stone concerning the present invention and its manufacturing method were explained, the present invention is not limited to the above-mentioned embodiment, and various design changes are possible in the range which does not deviate from the meaning of a claim. It goes without saying that there is one.

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

Claims

It has a base metal having a workpiece facing surface for facing a workpiece, and a fixed abrasive wire in which a large number of abrasive grains are fixed to a core wire,
The fixed abrasive wire is fixed so as to extend adjacent to the workpiece facing surface of the base metal, whereby a grinding portion for workpiece grinding is formed on the workpiece facing surface, and the adjacent abrasive wires are fixed. A grinding wheel characterized in that a discharge groove for chip discharge, which is a recess between abrasive wires, is formed.
In the grinding wheel according to claim 1,
The workpiece facing surface of the base metal is composed of an outer peripheral surface around the rotation axis of the base metal, and the fixed abrasive wire is spirally wound around the outer peripheral surface of the base metal along the rotation axis direction. The discharge groove is fixed to the base metal in a state, whereby the grinding portion is formed on the outer peripheral surface of the base metal, and the discharge groove is formed by the recess between the fixed abrasive wires adjacent in the rotation axis direction. Are formed.
In the grinding wheel according to claim 2,
The fixed abrasive 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 And a middle portion fixed between the first end and the second end with respect to the outer peripheral surface of the base metal. It is characterized in that it is wound so as to be able to move relative to each other in the direction of the rotation axis in a non-sticking state.
In the grinding wheel according to claim 1,
The workpiece facing surface of the base metal is composed of an end face on one end side in the rotation axis direction of the base metal, and the fixed abrasive wire is wound spirally around the rotation axis on the end face of the base metal. The grinding portion is formed on the end face of the base metal in such a manner that the grinding portion is formed on the end face of the base metal, and the recess between the fixed abrasive wire adjacent in the radial direction of the base metal is used. Characterized in that a discharge groove is formed.
In the grinding wheel according to claim 4,
The fixed abrasive wire has a first end and a second end at both ends in the longitudinal direction, and the first end is fixed on one side in the radial direction of the end face of the base metal, and the second end And the intermediate portion located between the first end and the second end is fixed to the end face of the base metal and fixed to the end face of the base metal. What is characterized by being intermittently fixed along the longitudinal direction.
In the grinding wheel according to claim 4 or 5,
A spirally recessed guide groove is engraved on the end face of the base metal, and the fixed abrasive wire is disposed in the guide groove along the longitudinal direction of the guide groove. Being fixed to the base metal in a state.
A manufacturing method of a grinding wheel in which a grinding portion for grinding a workpiece and a discharge groove for discharging chips are formed on the workpiece facing surface of a base metal having a workpiece facing surface for facing a workpiece,
The fixed abrasive wire having the outer peripheral surface around the rotation axis of the base metal as the above-mentioned work opposing surface and the abrasive grains fixed to the core wire, the outer peripheral surface of the base metal from the one end side of the rotation axis direction Forming the grinding portion on the outer peripheral surface by spirally winding toward the side, and forming the discharge groove by a recess between the fixed abrasive wires adjacent in the rotation axis direction;
And affixing the first end and the second end in the longitudinal direction of the fixed abrasive wire to the base metal.
A manufacturing method of a grinding wheel in which a grinding portion for grinding a workpiece and a discharge groove for discharging chips are formed on the workpiece facing surface of a base metal having a workpiece facing surface facing the workpiece,
The end face on one end side in the rotation axis direction of the base metal is used as the above-mentioned work opposing surface, and the fixed abrasive wire formed by fixing the abrasive grains to the core wire is spirally wound around the rotation axis on the end face of the base metal. Forming the grinding portion on the end face by winding, and forming the discharge groove by a recess between fixed abrasive wires adjacent in the radial direction of the end face;
Fixing the first end and the second end in the longitudinal direction of the fixed abrasive wire, and an intermediate portion located between the first end and the second end of the fixed abrasive wire to the base metal And a method of manufacturing a grinding wheel characterized in that
In the manufacturing method of the grinding wheel according to claim 8,
Engraving a spirally recessed guide groove around the rotation axis;
Placing the fixed abrasive wire in the guide groove along the longitudinal direction of the guide groove.