JPS6020152B2 - Diamond wheel for polishing stone etc. - Google Patents

Description

[Detailed Description of the Invention] Diamond wheels conventionally used as tools for polishing stones, etc. include those with metal bond tips fixed to the top surface of an alloy, and those with resin bond tips fixed to the top surface of an alloy. However, the greater the number of chips that are stuck to these alloys, the better the effectiveness during polishing work.

However, fixing a large number of chips to a single alloy increases the production cost of manufacturing a large number of chips, and increases the work cost of fixing a large number of chips to the alloy. An easy method for fixing the material is in practical use. This is a self-serving situation in which sharpness has been sacrificed in order to reduce production costs due to the pressure of price competition. The present invention relates to a diamond wheel for polishing stone, etc., which has a structure that provides good sharpness and extremely low production costs. The structure of the present invention will be explained below with reference to the drawings.

Figure 1 is a partial front view, Figure 2 is a side view, Figure 3 is A-A.
' cross-sectional view, Figure 4 is a B-B' cross-sectional view, and Figure 5 shows two annular abrasive layers (hereinafter simply referred to as low-grain layers) having a rectangular surface view containing diamond abrasive grains arranged concentrically. Figure 6 is a partial front view of the case where the shape of the grooves arranged on the upper and lower surfaces of the abrasive grain layer is curved, and Figure 7 is a partial front view of the case where the shape of the grooves is curved when FIG. 8 is a partial front view of the case where the grooves are oblique, and FIG. In the figure, 1 is the alloy, 2 is the abrasive grain layer, 3 is the bag hole, 4 is the upward groove provided on the top surface of the abrasive grain layer, 4' is the adjacent groove, and 5 is the groove 4, 4'. One of the plurality of grooves arranged downward on the lower surface of the abrasive grain layer arranged in the middle part is shown. These grooves 4 and 5 are linear grooves arranged radially, the bottoms of these grooves are on the same plane, and the grooves are arranged at positions where they do not interfere with each other. Fig. 3 (A-A' sectional view) shows that the groove 4 is provided upward, and Fig. 4 (B-B' sectional view) shows that the groove 5 is provided downward in the form of a tunnel. Show that. In FIGS. 3 and 4, 6 indicates that the abrasive grain layer 2 is
The bonding method is to fix the abrasive grain layer to the alloy using an adhesive or by brazing the abrasive grain layer into an annular body. The material is cold-molded into a ring shape and then simultaneously kneaded and fixed together with the alloy. Figure 5 shows two abrasive grain layers 2, 2.
Fig. 6 shows an embodiment in which the grooves 7 provided on the surface of the abrasive grain layer are curved in plan. FIG. 7 shows an embodiment in which the groove 8 is inclined at an angle to the radiation 9, and FIG. 8 shows an embodiment in which the groove consists of a straight portion 10 and a curved portion 11. In either case, the grooves on the upper surface of the abrasive grain layer and the grooves on the lower surface are assumed to have the same shape. The diamond wheel for polishing stones, etc. of the present invention has the configuration described above, and since a plurality of grooves are provided on the upper surface of the abrasive grain layer, the groove angles form cutting edges, and the number of grooves is smaller than that of conventional diamond wheels. This is more than double that of the diamond wheel, so the cutting quality is significantly improved.

Furthermore, this abrasive grain layer is made into a single annular body, which eliminates the trouble of fixing it to the alloy in one step, and instead of having many independent chips as in the case of conventional diamond wheels. The number of man-hours and therefore the production cost are drastically reduced compared to the case where each piece is fixed to the alloy. Next, there are multiple grooves on the bottom surface of the abrasive grain layer, which can be used as passages for cooling water during polishing operations, reducing the amount of cooling water used during polishing operations. Since the cooling capacity is increased and the cooling capacity is strengthened, it is also possible to increase the rotational speed of the diamond wheel or increase the working pressure, so that the working efficiency is further improved as the number of cutting edges increases.

Next, a description will be given of the arrangement in which the top surface of the abrasive layer and the bottom surface of the grooves provided on the bottom surface are on the same plane.

When the depth of the groove provided on the top surface of the above-mentioned abrasive grain layer is made equal to the thickness of the abrasive grain layer, the depth of this groove reaches the bottom end of the abrasive grain layer, and the abrasive grain layer is divided. In this case, the broken pieces of the abrasive grain layer must be individually bonded to the alloy, one by one, and the amount of work involved increases dramatically. The technical point of the present invention is to eliminate the trouble of adhering a single piece of abrasive layer to the alloy, and to adhere the abrasive layer to the alloy with a single adhesion operation, drastically reducing the work cost. Therefore, it is necessary to make the depth of the grooves provided on the upper surface of the abrasive grain layer shallower than the thickness of the low grain layer to reduce the division of the abrasive grain layer. In this case, when the abrasive grain layer is worn away by using a diamond wheel and the wear dimension reaches the depth of the groove, the groove that was on the top surface of the abrasive grain layer disappears, and therefore there is no cutting edge, so the cutting edge becomes sharp. has drastically decreased. At this time, if the bottom of the groove formed on the bottom surface of the abrasive grain layer, or the part that corresponds to the ceiling of the groove, opens on the polishing surface, the number of new grooves opened on the polishing surface will be equal to the number of grooves on the top surface. Since the number of grooves is the same as the number of existing grooves, the number of blades is the same, and the sharpness is the same, the same sharpness can be maintained until the abrasive grain layer is completely worn away and becomes zero. When the grooves on the top surface of the abrasive grain layer end, the grooves on the bottom surface of the abrasive grain layer intersect, which means that the bottom surface of the grooves on the top surface and the bottom surface (ceiling part) of the grooves on the bottom surface are on the same plane. and
This constitutes one element constituting the present invention. As has been made clear from the above explanation, the diamond wheel for polishing stones, etc. of the present invention has a "sharpness" by providing a large number of grooves on the upper and lower surfaces of the annular diamond abrasive grain layer fixed to the upper surface of the alloy. By providing a tunnel-like groove on the bottom surface of the abrasive grain layer, the flow rate of cooling water is increased and the ability to cool the abrasive grain layer is increased, making it possible to increase the polishing speed and polishing pressure. In addition to improving the efficiency of polishing work, the process of bonding the abrasive layer to the alloy only needs to be done once, compared to conventional diamond wheels where many small pieces of the abrasive layer are bonded one by one. This greatly reduces the time and effort required for this work, which greatly contributes to improving performance when polishing stones and the like and reducing production costs.

[Brief explanation of the drawing]

Figure 1, partial front view, Figure 2, side view, Figure 3, A-A
' Cross-sectional view, Figure 4, B-B' cross-sectional view, Figure 5, Partial front view when two abrasive grain layers are provided, Figure 6, Curved grooves on the upper and lower surfaces of the abrasive grain layer. Partial front view when installed, Fig. 7,
Fig. 8 is a partial front view when the planar shape of the groove is inclined with respect to the radiation; partial front view 1 when the planar shape of the groove is straight and curved. Alloy, 2...Low grain layer, 3...Shaft hole, 4, 4'...Groove on the upper surface of the low grain layer, 5...Groove on the lower surface of the abrasive layer, 6. ...Adhesive part between abrasive grain layer and alloy, 7...Curved groove, 8...
- Oblique groove, 9... Radiation, 10... Straight groove, 11... Curved groove, Q... Mirror oblique angle. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Scope of Claims] 1. When forming an annular abrasive layer having a rectangular cross section using a mixture of diamond abrasive grains and a metal powder for bonding the abrasive grains, a plurality of annular abrasive grains are provided on the upper and lower surfaces of the abrasive grain layer. 1. A diamond wheel for polishing stone, etc., characterized by having grooves arranged therein and an abrasive grain layer formed in this way fixed to the upper surface of a base metal. 2. The bottom surface of the groove provided on the top surface of the annular abrasive grain layer and the bottom surface of the groove provided on the bottom surface are on the same plane, and the groove provided on the bottom surface is similar to the groove on the top surface in the middle part of the groove provided on the top surface. Claim 1, which is arranged in a position where it does not interfere with the groove on the lower surface.
Diamond wheel for polishing stone etc. as described in section. 3. The diamond wheel for polishing stone or the like according to claim 1, wherein the annular abrasive grain layer has one or more rows arranged concentrically. 4 The planar shape of the grooves arranged on both the upper and lower surfaces of the annular abrasive grain layer is a radial straight line shape, a shape with an inclination angle to the radial straight line,
The diamond wheel for polishing stone, etc. according to claim 1, wherein the groove has a curved shape or a combination of the other two shapes.