JP5781371B2 - Manufacturing method of grinding wheel tool - Google Patents

Description

The present invention relates to a method of manufacturing a grinding wheel engineering tool capable of grinding a workpiece surface to a good surface roughness.

  The grinding process is a process for forming and finishing a workpiece by giving a certain amount of cutting and feeding to the grindstone tool while rotating the grindstone tool at a high speed. Further, as a grindstone tool used for grinding, a tool in which abrasive grains are further fixed on a base metal by an electrodeposition method using the principle of electroplating is generally known. And the manufacturing method of such a conventional grindstone tool is disclosed by patent document 1, for example.

Japanese Patent Laid-Open No. 6-39729

  In the conventional method for manufacturing a grindstone tool, the plating layer for holding the abrasive grains is adhered to the surface of the base metal through an adhesive so that the tip height (projection amount) of the abrasive grains is made uniform. ing.

  However, when an adhesive is used as in the conventional manufacturing method, the adhesive shrinks when it hardens, so that the plating layer is also distorted with the shrinking action. Thereby, since the holding position of the abrasive grains changes, the tip heights of the abrasive grains become uneven, which may reduce the grinding accuracy and grinding efficiency by the grindstone tool.

  Moreover, in the conventional manufacturing method, before the surface of a base metal is adhere | attached on a plating layer, since there exists a possibility that an adhesive agent may start to solidify, you have to perform an adhesion | attachment operation | work quickly. Furthermore, if the adhesive is mistakenly attached to the periphery other than the surface of the base metal during application of the adhesive, the solidified adhesive must be removed, which may lead to a decrease in bonding workability.

Accordingly, the present invention has been made to solve the above problems, aims at high-precision, and the grindstone tool capable of efficiently grinding to provide a method for manufacturing a grinding wheel tool that can be manufactured easily And

The manufacturing method of the grindstone tool according to the present invention that solves the above problems
While applying grease to each arc surface that is the inner peripheral surface of each of the three split molds , the abrasive grains are embedded and temporarily fixed in the grease so that the tips thereof are in contact with each arc surface , Apply thermosetting resin to the outer peripheral surface of the base metal,
The three divided molds are butted against the base metal from the outside in the radial direction of the base metal, and the base metal is incorporated inside the three split molds in the radial direction,
By tightening adjacent split molds with bolts, the arc surfaces are flush with each other, and the protruding portion of the abrasive particles protruding from within the grease is embedded in the thermosetting resin,
The thermosetting resin is heated and cured with the base metal incorporated in the three split molds assembled by the bolts, and the abrasive grains are fixed by the cured thermosetting resin. ,
The three split molds are disassembled to release the butting between the three split molds and the base metal, and then the grease stuck on the cured thermosetting resin is removed.

  Therefore, according to the grindstone tool according to the present invention, the abrasive grains whose tip height is aligned by bringing the tip into contact with the surface of the mold coated with grease are transferred to the base metal through the cured thermosetting resin. By fixing, all the abrasive grains can be uniformly involved in grinding, so that the grinding amount of each abrasive grain can be made uniform. Thereby, since uneven wear of the abrasive grains can be suppressed, it is possible to perform grinding with high accuracy and efficiency.

  Further, according to the method for manufacturing a grindstone tool according to the present invention, the abrasive grains are temporarily fixed by being pushed into the grease so that the tips thereof are in contact with the surface of the mold, and then the temporarily fixed grindstone is cured. By fixing to the surface of the base metal through the thermosetting resin, the grease that does not solidify is used for temporarily fixing the grindstone, so that the application operation and the removal operation can be easily performed. Thereby, the grindstone tool with which the front-end | tip height of the abrasive grain was equal can be manufactured easily.

It is a side view of a grindstone tool concerning one example of the present invention. (A)-(g) is sectional drawing which showed in order the manufacturing method of the grindstone tool which concerns on one Example of this invention. It is the schematic of the split type which comprises a type | mold, Comprising: (a) is a top view of a split type, (b) is a front view of a split type. It is the figure which showed the assembly state of the type | mold which has arrange | positioned the base metal inside, Comprising: (a) is a front view of a type | mold, (b) is AA arrow sectional drawing of the same figure (a).

Hereinafter, a method of manufacturing the grinding wheel engineering tool according to the present invention will be described in detail with reference to the drawings.

  First, the grindstone tool 1 shown in FIG. 1 is manufactured by using the method for manufacturing a grindstone tool according to the present invention, and a grinding surface 12 is formed on the outer peripheral surface of the tip-side large-diameter portion of the base metal 11. have. Although details will be described later, the grinding surface 12 has a configuration in which abrasive grains 22 are scattered at predetermined intervals by an inversion method using a mold 30. That is, the grindstone tool 1 is capable of grinding by rotating around its axis.

  Next, the manufacturing method of the grindstone tool 1 will be specifically described with reference to FIGS.

  First, as shown in FIG. 2A, grease 23 as a temporary fixing agent is applied to the arc surface 31 b of the split mold 31 that becomes the inner peripheral surface (surface) of the mold 30.

  Here, as shown in FIGS. 3A and 3B and FIGS. 4A and 4B, the mold 30 is composed of three divided molds 31 having the same shape. These split molds 31 are formed so that the cross-section thereof has a substantially sector shape, and a concave recess 31a is formed at the sector tip. The concave portion 31 a is formed in an arc shape and can be in close contact with the outer peripheral portion of the base metal 11. Furthermore, the most concave arc surface 31b for grease application is formed on the upper end side of the recess 31a.

  Next, as shown in FIG. 2B, after the abrasive grains 22 are scattered on the surface of the grease 23 applied to the arc surface 31b, the tips of the abrasive grains 22 are brought into contact with the arc surface 31b. Then, it is pushed into the grease 23 and temporarily fixed. Thereby, the tip height (projection amount) of each abrasive grain 22 becomes uniform.

  Then, as shown in FIG. 2C, a thermosetting resin 21 is applied to the surface 11 a of the base metal 11. The thermosetting resin 21 is, for example, an epoxy resin or a phenol resin, and a filler may be added to the thermosetting resin 21 to improve the grindstone fixing force.

  Next, as shown in FIG. 2D, the protruding portion of the abrasive grains 22 protruding from the surface of the grease 23 applied to the arc surface 31b is embedded in the thermosetting resin 21 applied to the surface 11a. The concave portion 31a of the split mold 31 and the base metal 11 are brought into contact with each other.

  That is, as shown in FIGS. 4 (a) and 4 (b), the recess 31 a of each split mold 31 is brought into close contact with the outer peripheral portion of the base 11 from the outside in the radial direction of the base 11. Gold 11 is incorporated into the mold 30. Furthermore, the mold 30 is assembled by tightening the adjacent divided molds 31 with the bolts 32 from such an assembled state.

  As a result, the arc surfaces 31b are flush with each other, and the surface of the grease 23 applied to the arc surfaces 31b and the thermosetting resin 21 applied to the surface 11a are in close contact with each other. Thus, the protruding portion of the abrasive grains 22 temporarily fixed in the grease 23 is embedded in the thermosetting resin 21. Therefore, the abrasive grains 22 are held in the thermosetting resin 21 in a state where the tip heights of the abrasive grains 22 are aligned at the same height.

  Then, as shown in FIG. 2 (e), the mold 30 is placed in a furnace (not shown) with the tip heights of the abrasive grains 22 aligned. Thus, by heating the mold 30 incorporating the base metal 11 at a predetermined time and temperature, the thermosetting resin 21 is cured, and the abrasive grains 22 are fixed by the cured thermosetting resin 21. To do.

  Next, as shown in FIG. 2 (f), after removing the mold 30 from the furnace, the mold 30 is disassembled (the butt between the mold 30 and the base metal 11 is released), and the base metal 11 is removed. At this time, the grease 23 is stuck to the cured thermosetting resin 21 by heating, and thus the abrasive grains 22 have a high-precision tip height by the cured thermosetting resin 21 and the grease 23. Fixed in an aligned state.

  Next, as shown in FIG. 2G, the grease 23 covering the cured thermosetting resin 21 is wiped off with an organic solvent (for example, toluene, acetone, etc.). As a result, the abrasive grains 22 are fixed only to the thermosetting resin 21, and the ground surface 12 is formed on the surface 11 a of the base 11.

  Therefore, according to the grindstone tool 1 according to the present invention, the thermosetting resin obtained by curing the abrasive grains 22 whose tips are aligned by bringing the tips into contact with the arcuate surface 31b of the split mold 31 to which the grease 23 is applied. Since all the abrasive grains 22 can be uniformly involved in grinding by fixing to the surface 11a of the base metal 11 via 21, the grinding amount of each abrasive grain 22 can be made uniform. . Thereby, since uneven wear of the abrasive grains 22 can be suppressed, it is possible to perform grinding with high accuracy and efficiency.

  In addition, according to the method for manufacturing the grindstone tool 1 of the present invention, the abrasive grains 22 are temporarily fixed by being pushed into the grease 23 so that the tips thereof are in contact with the arcuate surface 31b of the split mold 31. By fixing the fixed grindstone 22 to the surface 11a of the base 11 through the cured thermosetting resin 21, the non-solidified grease 23 is used for temporarily fixing the grindstone 22. And removal (wiping) work can be easily performed. Thereby, the grindstone tool 1 with which the front-end | tip height of the abrasive grain 22 was equal can be manufactured easily.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a grindstone tool and a method for manufacturing the grindstone tool that improve grindability by adjusting the interval between the abrasive grains and the tip height to improve the sharpness.

DESCRIPTION OF SYMBOLS 1 Grinding wheel tool 11 Base metal 11a Surface 12 Grinding surface 21 Thermosetting resin 22 Abrasive grain 23 Grease 30 Mold 31 Dividing die 31a Recessed part 31b Arc surface 32 Bolt

Claims (1)

While applying grease to each arc surface that is the inner peripheral surface of each of the three split molds , the abrasive grains are embedded and temporarily fixed in the grease so that the tips thereof are in contact with each arc surface , Apply thermosetting resin to the outer peripheral surface of the base metal,
The three divided molds are butted against the base metal from the outside in the radial direction of the base metal, and the base metal is incorporated inside the three split molds in the radial direction,
By tightening adjacent split molds with bolts, the arc surfaces are flush with each other, and the protruding portion of the abrasive particles protruding from within the grease is embedded in the thermosetting resin,
The thermosetting resin is heated and cured with the base metal incorporated in the three split molds assembled by the bolts, and the abrasive grains are fixed by the cured thermosetting resin. ,
The grindstone characterized by removing the grease stuck on the cured thermosetting resin after disassembling the three divided molds and releasing the butting between the three divided molds and the base metal Tool manufacturing method.

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