JP4393143B2 - Truing tool and manufacturing method thereof - Google Patents

Description

  The present invention relates to a truing tool for truing a grinding wheel when the sharpness of the grinding surface is lowered.

As such a truing tool, an annular truing portion is formed coaxially by bonding diamond abrasive grains to a peripheral portion of a circular base rotated around a rotation axis with a metal-based bonding material (metal bond). Yes (see, for example, Patent Document 1). As shown in FIGS. 11 (a) and 12 (a), this truing tool is provided with annular truing portions 3 and 4 having a rectangular cross section so as to protrude from the side surface and the outer peripheral surface of the outer peripheral portion of the base 2. It is a thing. The truing tool 1 is used with the rotation axis 1a inclined with respect to the rotation axis 5a of the grinding wheel 5 (the inclination angle is, for example, 8 degrees). The grinding wheel 5 is configured by providing a grinding wheel portion 7 on the outer periphery of the core portion 6, and when the side grinding surface 7a of the grinding wheel portion 7 is trued, the tip surface 3a of the side grinding surface truing portion 3 is used as the end surface 7a. The truing tool 1 and the grinding wheel 5 are moved relative to each other in a direction orthogonal to the rotational axis 5a of the grinding wheel 5 (see FIG. 11 (a)), and the outer peripheral grinding surface 7b of the grinding wheel portion 7 is trued. In this case, the front end surface 4a of the outer peripheral grinding surface truing portion 4 is brought into contact with the outer peripheral grinding surface 7b, and the truing tool 1 and the grinding wheel 5 are moved relative to each other in a direction parallel to the rotation axis 5a of the grinding wheel 5 ( (See FIG. 12 (a)). As shown in FIG. 13, each of the truing portions 3 and 4 is obtained by embedding and bonding diamond abrasive grains 3b and 4b in metal-based binders (metal bonds) 3c and 4c such as copper or tin. The bonds 3c and 4c are dense without cavities.
JP-A-8-90411 (paragraphs [0014] to [0019], FIGS. 2 to 6).

  In the above-described conventional technique, the diamond abrasive grains 3b and 4b are filled with the metal 3c and 4c, which is a binder, without gaps, and there are no pores. Therefore, the diamond abrasive grains 3b and 4b on the tool surface and the metals 3c and 4c And the diamond abrasive grains 3b and 4b did not protrude, and could not sufficiently penetrate the grindstone. Further, since the diamond abrasive grains 3b and 4b are mechanically embedded in the metals 3c and 4c and are not chemically bonded, the holding power of the abrasive grains is weak, and the diamond abrasive grains 3b and 4b are binders. It is easy to drop off from a certain metal 3c, 4c, and the number of abrasive grains involved in truing of the grinding surfaces 7a, 7b of the grinding wheel 5 is reduced. The grinding surfaces 7a and 7b of the grinding wheel 5 treeed with such a truing tool are flat and poor in sharpness. When grinding with such a grinding wheel 5, the grinding resistance increases, and the desired grinding efficiency and surface quality are ensured. I couldn't.

  In particular, when truing the side grinding surface 7a of the grindstone 7, the side grinding surface 7a is a flat surface as shown in FIG. 11 (b), which is a view of FIG. The front end surface 3a of the truing part 3 is arcuate due to the inclination between the truing tool 1 and the grinding wheel 5, but the contact length between the grindstone and the truing tool is increased, the truing resistance is increased, and the truing part 3 The diamond abrasive grains 3b could not break the abrasive grains on the side grinding surface 7a.

  As described above, the grinding surfaces 7a and 7b of the grinding wheel portion 7 of the grinding wheel 5 that are trued by the truing tool of Patent Document 1 have poor sharpness. Therefore, when a workpiece is ground with such a grinding wheel 5, the grinding resistance is low. There is a problem that grinding burn is likely to occur on the surface of the workpiece and the desired grinding efficiency and surface quality of the workpiece cannot be obtained. The object of the present invention is to solve each of these problems.

In order to solve the above-described problem, the structural feature of the invention according to claim 1 is that an annular truing portion for truing the grinding surface of the grinding wheel is provided on the outer peripheral portion of a circular base that is driven to rotate about the rotation axis. In a truing tool formed coaxially, a bowl-shaped base is provided on the outer peripheral surface of the truing tool so as to be coaxial with the rotational axis, and a cylindrical base is provided on the side of the outer peripheral portion so as to be coaxial with the rotational axis. A single-layer diamond abrasive grain layer on one side surface of the bowl-shaped substrate and the outer peripheral surface of the cylindrical substrate, and a vanadium (V) metal in the periodic table group 4A containing titanium (Ti). An alloy of a metal of any one of the metals in Group 5A of the Periodic Table containing metals and metals in Group 6A of the Periodic Table of Tables containing chromium (Cr) with a metal in Groups 1B of the Periodic Table The brazing material becomes a diamond The truing portion is formed by adhering to the periphery of the Mondo abrasive grains and brazing in a state where dents are formed between adjacent diamond abrasive grains.

According to a second aspect of the present invention, there is provided a truing tool in which an annular truing portion for truing a grinding surface of a grinding wheel is coaxially formed on an outer peripheral portion of a circular base that is driven to rotate about a rotation axis. And a base having a cylindrical base projecting coaxially with the rotational axis is provided on the outer peripheral side, and a base having a cylindrical base projecting coaxially with the rotational axis is provided on the outer peripheral side. On one side surface of the substrate and the outer peripheral surface of the cylindrical substrate, two or three diamond abrasive layers are provided on the periodic table containing vanadium (V), a group 4A metal of the periodic table containing titanium (Ti). By a brazing material comprising an alloy of a metal of any one of the group 5A and a metal of group 6A of the periodic table containing chromium (Cr) and a metal of group 1B of the periodic table, The brazing material is around the diamond abrasive grains and The truing portion is formed by adhering to one side surface of the bowl-shaped substrate and the outer peripheral surface of the cylindrical substrate and brazing with a plurality of pores formed between the diamond abrasive grains .

A structural feature of the invention according to claim 3 is that the truing is formed by coaxially forming an annular truing portion for truing the grinding surface of the grinding wheel on the outer peripheral portion of a circular base that is driven to rotate about the rotation axis. In a method for manufacturing a tool, a base in which a bowl-shaped base is provided on the outer peripheral surface of the base and protrudes coaxially at a substantially right angle with the rotation axis, and a cylindrical base is provided on the side of the outer periphery on the same axis as the rotation axis. A periodic table group 4A metal containing titanium (Ti), a periodic table group 5A metal containing vanadium (V), and a group 6A metal containing chromium (Cr) Any one of the above metals and a Group 1B metal of the periodic table are mixed with an organic binder in a sticky state to prepare a sticky granular substance, and the sticky granular substance is One side surface of the cylindrical substrate and the outside of the cylindrical substrate A large number of diamond abrasive grains are implanted into a single layer in a substantially uniform arrangement with a predetermined concentration from above the coated adhesive granular material, and are applied to the peripheral surface of one side surface of the bowl-shaped substrate and the cylindrical substrate. The base is seated on the outer peripheral surface and the diamond abrasive grains are held by the sticky granular material in a firing furnace and fired .

In the invention according to claim 1, a single diamond abrasive grain layer is formed on one side surface of the bowl-shaped substrate protruding from the outer peripheral surface of the base and the outer peripheral surface of the cylindrical substrate protruding from the outer peripheral side. Any one of a Group 4A metal of the periodic table including Ti), a Group 5A metal of the periodic table including vanadium (V), and a Group 6A metal of the periodic table including chromium (Cr). Since the truing part of the truing tool was formed by brazing with a brazing material made of an alloy of a group 1 metal and a group 1B metal of the periodic table, the diamond abrasive grains had a metallizing layer formed on the surface and were wetted around A good brazing material adheres and rises, and dents are formed between adjacent diamond abrasive grains. As a result, many diamond abrasive grains are firmly held by the brazing material with high wettability and strong holding force through the metallizing layer, and then sufficiently penetrate into the grinding wheel to sharpen the outer and side grinding surfaces of the grinding wheel. You can truing well. In particular, when the side grinding surface of the grinding wheel is trued with the side truing part with the rotational axis of the truing tool and the grinding wheel slightly inclined, the contact between the side grinding surface and the side truing part Even when the length is increased, each diamond abrasive grain in a single layer can sufficiently bite into the grindstone and crush the abrasive grains of the grinding wheel to true the side grinding surface with a sharpness.

In the invention according to claim 2, two or three diamond abrasive grain layers are provided on one side surface of the bowl-shaped base member protruding from the outer peripheral surface of the base and the outer peripheral surface of the cylindrical base member protruding from the outer peripheral side . Any of Group 4A metal of periodic table containing titanium (Ti), Group 5A metal of periodic table containing vanadium (V), and Group 6A metal of chromium (Cr) Since brazing is performed with a brazing material made of an alloy of a metal of one group and a metal of group 1B of the periodic table, the diamond abrasive grains in a state where a plurality of pores are formed between the diamond abrasive grains. And bonded to the periphery of the diamond abrasive grains, and to one side surface of the bowl-shaped substrate and the outer peripheral surface of the cylindrical substrate. As a result, many diamond abrasive grains are firmly held by the brazing material with high wettability and strong holding force through the metallizing layer, and then sufficiently penetrate into the grinding wheel to sharpen the outer and side grinding surfaces of the grinding wheel. You can truing well. In particular, when the side grinding surface of the grinding wheel is trued with the side truing part with the rotational axis of the truing tool and the grinding wheel slightly inclined, the contact between the side grinding surface and the side truing part Even if the length becomes longer, each diamond abrasive grain can sufficiently bite into the grinding wheel to crush the abrasive grains of the grinding wheel and to true the side grinding surface with a sharpness. In addition, since pores are formed between the two or three layers of abrasive grains , the diamond abrasive grains protrude from the brazing material and can sufficiently penetrate into the side grinding surface of the grindstone.

In the invention according to claim 3, the periodic table group 4A metal containing titanium (Ti), the periodic table group 5A metal containing vanadium (V), and the periodic table containing chromium (Cr). An adhesive granular material obtained by mixing any one of the metals in Group 6A and a metal from Group 1B of the Periodic Table into an adhesive state by adding an organic binder to the outer peripheral surface of the base. It is applied to one side of the projecting bowl-shaped substrate and the outer peripheral surface of the cylindrical substrate projecting to the side of the outer periphery, and a large number of diamond abrasive grains are roughly concentrated at a predetermined concentration level from the applied adhesive granular material. Since the base is placed in a firing furnace in a single-layer arrangement in a uniform arrangement and fired, the outer periphery of a cylindrical base projecting from one side of the bowl-shaped base projecting from the outer peripheral surface of the base and the side of the outer periphery A single-layer diamond abrasive grain layer is formed on the surface of the metal alloy. -A truing tool brazed with a material can be easily manufactured.

(First embodiment)
As shown in FIGS. 1 to 5, the truing tool 10 according to the first embodiment has a circular base 11 that is rotated around a rotation axis, and is coaxial from the end surface of the outer peripheral edge of the base 11 in parallel with the rotation axis. The cylindrical side ground surface truing part 20 protrudes and the peripheral ground surface truing part 25 protrudes coaxially from the outer peripheral surface of the base 11 substantially at right angles to the rotation axis. This truing tool 10 is arranged so that the rotational axis thereof is inclined by 8 degrees with respect to the rotational axis of the grinding wheel 5 in which the grinding wheel portion 7 is provided on the outer periphery of the core portion 6, as in the prior art described above.

  As shown in FIGS. 1 to 5, the side grinding surface truing portion 20 and the outer peripheral grinding surface truing portion 25 of the first embodiment are a circular base 11 that is rotationally driven around a rotation axis, and an outer periphery of the base 11. A number of diamond abrasive grains 22 brazed to the part, and a periodic table 4A group metal containing vanadium (V), a periodic group 4A metal containing titanium (Ti) brazing both 11 and 22 A metal of any one of the metals in Group 6A of the periodic table including chromium (Cr) and copper (Cu), silver (Ag), and gold (Au) It is composed of a brazing material 23 made of an alloy with at least one of the metals of Group 1B. A cylindrical base 21 is provided on the left side surface of the outer periphery of the circular base 11 so as to protrude coaxially with the rotation axis. A side grinding surface truing portion 20 is formed on the cylindrical surface of the base body 21 by brazing a large number of diamond abrasive grains 22 with a brazing material 23 and truing the side grinding surface 7 a of the grinding wheel 5. On the outer periphery of the base, a bowl-shaped base 26 is provided so as to protrude coaxially with the rotation axis, and a large number of diamond abrasive grains 27 are formed on the side of the base 26 by a brazing material 28 having the same composition as the brazing material 23. In addition, an outer peripheral grinding surface truing portion 25 for truing the outer peripheral grinding surface 7b of the grinding wheel 5 is formed.

  In the production of the side grinding surfaces and outer peripheral grinding surface truing portions 20 and 25, a periodic table group 4A metal containing titanium (Ti), a periodic table group 5A metal containing vanadium (V), and chromium A suitable organic material is formed by combining a metal particle of any one of the metals in Group 6A of the periodic table containing (Cr) and a metal particle of Group 1B of the periodic table such as copper (Cu) or silver (Ag). A binder is added and mixed in a sticky state to prepare the sticky granular material 23A. The metal contained in the adhesive granular material 23A becomes an alloy by firing, which will be described later, to become the brazing material 23. Then, such an adhesive granular material 23A is applied to the outer peripheral surface of the cylindrical substrate 21 and the side surface of the bowl-shaped substrate 26 with a brush or the like (see FIG. 2). Next, a large number of diamond abrasive grains 22 and 27 that have been sieved in advance to a predetermined particle size are implanted into a single layer in a substantially uniform arrangement so as to have a predetermined concentration degree from above the coated adhesive granular material 23A. Then, the diamond abrasive grains 22 and 27 are seated on the outer peripheral surface of the cylindrical substrate 21 and the side surface of the bowl-shaped substrate 26 (see FIG. 3).

  Next, the cylindrical base 21 holding the diamond abrasive grains 22 and 27 with the adhesive granular material 23A and the base 11 including the bowl-like gas 26 are placed in a firing furnace, and an inert gas such as argon gas or an atmosphere in a vacuum state Is fired at a firing temperature of 840 to 940 ° C. In this firing, a metallizing layer made of titanium carbide (TiC) or the like is formed between the diamond abrasive grains 22 and 27 and titanium (Ti). These metallizing layers, copper (Cu), and silver (Ag) It is easy to fuse with the metal of Group 1B of the periodic table, and the wettability between the diamond abrasive grains 22 and 27 and the brazing materials 23 and 28 is improved through the metalizing layer. Since the metalizing layer formed on the surface of the diamond abrasive grains 22 has good wettability with respect to the molten brazing materials 23 and 28, the molten brazing materials 23 and 28 adhere to the periphery of the diamond abrasive grains 22 and 28. The brazing material 23, 28 between the adjacent diamond abrasive grains 22, 27 has a shape in which the portion in contact with the diamond abrasive grains 22, 27 is high and the intermediate portion is low, and a large dent is formed between the adjacent diamond abrasive grains. The If this is cooled, the brazing materials 23 and 28 rise and adhere to the periphery of the diamond abrasive grains 22 and 27, and the single-layer diamond abrasive grains 22 and 27 adhere to the base bodies 21 and 26 by the brazing materials 23 and 28. The side grinding surface and the outer circumferential grinding surface truing portions 20 and 25 brazed with are obtained.

  Next, the operation when the right side grinding surface 7a of the grinding wheel 5 is trued by the side grinding surface truing part 20 of the first embodiment will be described with reference to FIG. In this case, the grinding wheel 5 and the truing tool 10 are rotationally driven, and the truing tool 10 is moved back to a position where the tip surface position of the side grinding surface truing portion 20 is outside the outer peripheral grinding surface 7b. Positioning with respect to the grinding wheel 5 so that the position in the grinding wheel axial direction of the leftmost portion of the front end surface 20a of the side grinding surface truing portion 20 protruding to the left side is a position to cut a small amount into the side grinding surface 7a. To do. When the truing tool 10 is moved forward at a side grinding surface truing speed in a direction perpendicular to the rotational axis of the grinding wheel 5 as indicated by an outlined arrow, the tip surface 20a of the side grinding surface truing portion 20 is moved to the grinding wheel 5. The side grinding surface 7a is trued. Since the diamond abrasive grains 22 have a metallizing layer formed on the surface and are firmly held by the brazing material 23 with high wettability through the metalizing layer, the diamond abrasive grains 22 fall off the brazing material 23. The side grinding surface truing part 20 is a side where each diamond abrasive grain 22 sufficiently penetrates into the grinding wheel part 7 to crush the abrasive grains on the side grinding face 7a and the contact length becomes longer. The ground surface 7a can be trued with good sharpness.

  Further, when the outer peripheral grinding surface 7b of the grinding wheel 5 is trued by the outer peripheral grinding surface truing portion 25, the truing tool 10 is positioned so that the position of the outer peripheral grinding surface truing portion 25 is on the left side of the lateral width direction range of the outer peripheral grinding surface 7b. It is moved and positioned with respect to the grinding wheel 5 so that the outer peripheral tip surface 25a of the outer peripheral grinding surface truing portion 25 is in a position to cut a small amount with respect to the outer peripheral grinding surface 7b of the grinding wheel 5. Then, as shown by the white arrow in FIG. 5, if the truing tool 10 is moved to the right at the peripheral grinding surface truing speed in the rotational axis direction of the grinding wheel 5, the tip surface 25 a of the peripheral grinding surface truing portion 25 is The outer peripheral grinding surface 7b of the grinding wheel 5 is trued. Also in this case, the diamond abrasive grain 27 has a metallizing layer formed on the surface, and is firmly held by the brazing material 28 with high wettability through the metallizing layer with a strong holding force. Each diamond abrasive grain 27 crushes the abrasive grains on the outer peripheral grinding surface 7b, and the outer peripheral grinding surface 7b can be trued with good sharpness.

  In the above embodiment, a large number of diamond abrasive grains 22 and 27 are implanted in a single layer in the adhesive granular material (23A) applied to the cylindrical surface of the cylindrical substrate 21 and the side surface of the bowl-shaped substrate 26. An adhesive granular material mixed with the diamond abrasive grains 22 or 27 is applied to the cylindrical surface of the cylindrical substrate 21 or the side surface of the bowl-shaped substrate 26 so that the diamond abrasive grains 22 or 27 are formed into a single layer, and is fired. You may do it.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. As in the first embodiment, the truing tool of the second embodiment is generally coaxial with the circular base 11 rotated around the rotation axis, and from the side surface of the outer peripheral edge of the base 11 in parallel with the rotation axis. A cylindrical side ground surface truing portion 20A projecting from the outer periphery and an outer peripheral ground surface truing portion projecting coaxially from the outer peripheral surface of the base 11 substantially at right angles to the rotation axis. Since the number of diamond abrasive grains in the ground surface truing portion is two and only the pores 24 are formed between the abrasive grains 22, the difference from the first embodiment is as follows. explain. Since the outer peripheral grinding surface truing portion is the same as the side grinding surface truing portion 20A, illustration and detailed description thereof are omitted.

  As shown in FIG. 7, the side grinding surface truing portion 20A is manufactured by placing a die 35 formed of graphite or the like on the outer peripheral surface (or inner peripheral surface) of the cylindrical base 21, and the die 35, the cylindrical base 21 and the like. A space having an appropriate width formed between the particles is filled with an adhesive granular material 23A mixed with an appropriate amount of diamond abrasive grains 22 and fired. After firing, the graphite mold 35 is removed and manufactured. To do. As described above, the metalizing layer formed on the surface of the diamond abrasive grains 22 has good wettability with respect to the molten brazing material 23. Therefore, the molten brazing material 23 is surrounded by the diamond abrasive grains 22 and the cylindrical base 21. A plurality of pores 24 are formed by gathering gaps between the metal grains between the diamond abrasive grains 22. If this is cooled, the brazing material 23 adheres to the surface of the diamond abrasive grains 22 and the surface of the cylindrical substrate 21 with the pores 24 being appropriately formed in the brazing material 23, so that two layers of diamond abrasive grains 22 are formed. The side grinding surface truing part 20 brazed to the base body 21 by a brazing material 23 with a strong holding force is obtained. The peripheral grinding surface truing part is also manufactured in substantially the same manner as the side grinding surface truing part 20A.

  Since the side grinding surface truing portion 20A of the second embodiment truws the side grinding surface 7a of the grinding wheel 5 with a plurality of layers of diamond abrasive grains 22, the wear of the diamond abrasive grains 22 is reduced and the tool life is reduced. Becomes longer. It should be noted that the number of diamond abrasive grains 22 and 27 brazed to the cylindrical base bodies 21 and 26 by the brazing material 23 is preferably a small number of layers of about 2 to 4.

  In the second embodiment, the side grinding surface 20a of the grinding wheel 5 and the side grinding surface 7b that abuts the side grinding surface 7b and truing the side grinding surface 7a and the front end surface of the circumferential grinding surface truing part The diamond abrasive grains 22 and 27 are worn out and fall off along with the truing of the side grinding surface 7a and the outer peripheral grinding surface 7b. However, since many pores 24 are formed in the brazing material 23, the diamond abrasive grains 22 and 27 will be in the state which protruded from the brazing material.

As shown in FIG. 8, the truing tool shown in FIG. 8 and FIG. 9 has a circular base 11 that rotates around the rotation axis, and a cylindrical shape that protrudes from both end surfaces of the outer peripheral edge of the base 11 in the rotation axis direction. The side grinding surface truing portion 20B and the bowl-shaped outer grinding surface truing portion 25B protruding from the outer peripheral surface of the base 11 in a direction substantially perpendicular to the rotation axis. This side ground surface truing portion 20B has a cylindrical shape similar to that of the side ground surface truing portion 20 of the first embodiment, and as shown in FIG. 9, the base 21 is eliminated and a large number of diamond abrasive grains 22 are made of a brazing material. 23 and brazed to each other in a cylindrical shape and brazed to both sides of the outer periphery of the base portion 11. The outer peripheral grinding surface truing portion 25B is also formed in a bowl shape similar to the outer peripheral grinding surface truing portion 25 of the first embodiment by eliminating the base 26 and brazing a large number of diamond abrasive grains 27 with a brazing material 28. It is. As described above, the metalizing layer formed on the surface of the diamond abrasive grains 22 has good wettability with respect to the molten brazing material 23. Therefore, the molten brazing material 23 is surrounded by the diamond abrasive grains 22 and the cylindrical base 21. In addition, the gaps between the metal grains are gathered between the diamond abrasive grains 22 to form a plurality of pores 24. In this truing tool 10, the left and right side grinding surfaces 7a of the grinding wheel 5 are trued by the respective front end surfaces 20a of the left and right side grinding surface truing portions 20B in the same manner as the prior art shown in Patent Document 1 described above, and outer periphery grinding is performed. The outer peripheral grinding surface 7b of the grinding wheel 5 is trued by the front end surface 25a of the surface truing portion 25B.

The truing tool 10 shown in FIG. 10 is formed by brazing an annular truing portion 30 projecting in the radial direction on the outer peripheral surface of a circular base 11 rotated around a rotation axis. The truing portion 30 is formed by brazing a large number of diamond abrasive grains 31 with a brazing material 32 having the same component as the brazing material 23 in an annular manner and brazing the outer peripheral surface of the base portion 11. Two frustoconical truing surfaces 30a and 30b are formed on both sides of the outer peripheral portion of the truing portion 30, and the buses of the truing surfaces 30a and 30b are orthogonal to each other.

The truing tool 10 has a rotation axis so that the generatrix of the truing surface 30a is parallel to the side grinding surface 7a of the grinding wheel 5 and the generatrix of the truing surface 30b is parallel to the outer peripheral grinding surface 7b of the grinding wheel 5. Is inclined with respect to the rotational axis of the grinding wheel 5. The truing tool 10 is moved in a direction orthogonal to and parallel to the rotation axis of the grinding wheel 5 to truve the side grinding surface 7a of the grinding wheel 5 by the truing surface 30a and toro the outer peripheral grinding surface 7b by the truing surface 30b. Is.

The partial expanded sectional view which shows the side grinding surface truing part of 1st Embodiment by this invention. The partial expanded sectional view explaining the state which apply | coated the adhesive granular material of the manufacturing process of the side grinding surface truing part to the cylindrical surface of a cylindrical base | substrate. The partial expanded sectional view which shows the state which implants a diamond abrasive grain in the viscous granular material of the manufacturing process of a side grinding surface truing part in a single layer. The partial expanded sectional view which shows the state which is truing the side grinding surface in the side grinding surface truing part. The partial expanded sectional view which shows the state which is truing the outer periphery grinding surface in the outer periphery grinding surface truing part. The partial expanded sectional view which shows the truing part of 2nd Embodiment by this invention. The partial expanded sectional view which shows a part of manufacturing process of the truing part of 2nd Embodiment. The fragmentary sectional view which shows another truing tool . The partial expanded sectional view which shows the abrasive grain bonding state of a truing part . The fragmentary sectional view which shows another truing tool . The fragmentary sectional view which shows the state which is truing the side grinding surface of a grindstone with the conventional truing tool. The figure seen from the A direction in Fig.11 (a). The fragmentary sectional view which shows the state which is truing the outer periphery grinding surface of a grindstone with the conventional truing tool. The figure seen from B direction in Fig.12 (a). The partial expanded sectional view which shows the abrasive grain engagement state of the conventional truing part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 ... Grinding wheel, 7a ... Side grinding surface, 7b ... Peripheral grinding surface, 10 ... Truing tool, 11 ... Base, 20, 20B ... Side grinding surface truing part, 25, 25B ... Peripheral grinding surface truing part, 21 ... Cylindrical substrate, 26 ... bowl-shaped substrate, 22, 27, 31 ... diamond abrasive grains, 23, 28 ... brazing material, 23A ... adhesive granular material, 24 ... pores, 30 ... truing part, 30a, 30b ... truing surface.

Claims (3)

In the truing tool formed by coaxially forming an annular truing portion for truing the grinding surface of the grinding wheel on the outer peripheral portion of the circular base that is driven to rotate about the rotation axis,
Provided with a base on which an eaves-like base protrudes coaxially with the rotation axis substantially at right angles to the outer peripheral surface, and a cylindrical base protrudes coaxially with the rotation axis on the outer peripheral side,
A single-layer diamond abrasive grain layer on one side surface of the bowl-shaped substrate and the outer peripheral surface of the cylindrical substrate, a periodic table containing vanadium (V), a group 4A metal containing titanium (Ti). By a brazing material composed of an alloy of a metal of any one of the group 5A and a metal of group 6A of the periodic table containing chromium (Cr) and a metal of group 1B of the periodic table, A truing tool characterized in that the brazing material adheres to the periphery of diamond abrasive grains and rises, and is brazed in a state where dents are formed between adjacent diamond abrasive grains to form the truing portion. In the truing tool formed by coaxially forming an annular truing portion for truing the grinding surface of the grinding wheel on the outer peripheral portion of the circular base that is driven to rotate about the rotation axis,
Provided with a base on which an eaves-like base protrudes coaxially with the rotation axis substantially at right angles to the outer peripheral surface, and a cylindrical base protrudes coaxially with the rotation axis on the outer peripheral side,
On one side surface of the bowl-shaped substrate and the outer peripheral surface of the cylindrical substrate, two to three diamond abrasive layers are formed, and a period containing vanadium (V), a group 4A metal of the periodic table containing titanium (Ti). A brazing material comprising an alloy of a metal of any one of the group 5A of the periodic table and a metal of the group 6A of the periodic table containing chromium (Cr) and a metal of the group 1B of the periodic table The brazing material adheres to the periphery of the diamond abrasive grains, one side surface of the bowl-shaped substrate, and the outer peripheral surface of the cylindrical substrate, and brazing with a plurality of pores formed between the diamond abrasive grains. A truing tool characterized in that the truing part is formed. In a method for producing a truing tool in which an annular truing portion for truing a grinding surface of a grinding wheel is coaxially formed on an outer peripheral portion of a circular base that is rotationally driven around a rotation axis,
  Provided with a base on which an eaves-like base protrudes coaxially with the rotation axis substantially at right angles to the outer peripheral surface, and a cylindrical base protrudes coaxially with the rotation axis on the outer peripheral side,
  Any of Group 4A metal of periodic table containing titanium (Ti), Group 5A metal of periodic table containing vanadium (V), and Group 6A metal of chromium (Cr) Mixing a group of metals and a group 1B metal of the periodic table with an organic binder into a sticky state to prepare a sticky granular material,
  Applying the adhesive granular material to one side surface of the bowl-shaped substrate and the outer peripheral surface of the cylindrical substrate;
  From above the coated adhesive granular material, a large number of diamond abrasive grains are implanted in a single layer with a predetermined concentration in a substantially uniform arrangement and are seated on one side surface of the bowl-shaped substrate and the outer peripheral surface of the cylindrical substrate,
  A method for producing a truing tool, wherein the base holding diamond abrasive grains with an adhesive granular material is placed in a firing furnace and fired.

Images