JPH05177551A - Whetstone wheel - Google Patents

Abstract

PURPOSE: To easily manufacture a highly reliable grinding wheel at low cost by providing a termination part having an engagement means in an insert material made of a sintered abrasive material and embedding the termination part in the surface of a support made of plastic material. CONSTITUTION: This grinding wheel is provided with a terminal part 2 having an engagement means in an insert material 1 made of a sintered abrasive material. The termination part 2 is embedded in the surface 3 of a support 4 made of a plastic material. In this case, the support 4 is substantially formed into a cup form, the surface 3 is formed into a planar upper rim, and a hole 6 for continuing to a grinder is bored in the bottom 5. The engagement mean of the termination part 2 is substantially formed into a dovetail tenon or at least formed of a hole. A glass fiber reinforced phenol resin is used for the plastic material. This constitution can easily manufacture the highly reliable grinding wheel at low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding wheel using an abrasive such as alumina or diamond, which is particularly used for grinding and polishing smooth surfaces.

[0002]

BACKGROUND OF THE INVENTION Generally, grinding wheels used to grind and polish smooth surfaces consist of a plurality of inserts made from sintered abrasives. The insert material is welded or glued to the steel support ring. The support ring is connected to an aluminum cup, which forms the base of the grinding wheel that is fixed to the grinder.

As is clear from the above description, for example,
To manufacture a conventional cup-type grinding wheel, it is necessary to weld or bond the same number of inserts as the number of insert materials required to manufacture a given type of grinding wheel. Coupling is necessary, and such work requires special care so that it does not fall off during use.

Such necessary work is accompanied by an increase in cost,
Obviously, this has a negative impact on the final cost of each cup wheel. In addition, if the individual inserts cannot be completely welded or bonded to each ring, there is a risk of the inserts separating.
Further, the insert material is subjected to stress in the vertical direction and the transverse direction with respect to the insert material during machining, and when the separation actually occurs, the grinding ability of the grinding wheel is changed, and the insert material can be machined. It can damage the surface.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to substantially eliminate and eliminate the above-mentioned problems associated with conventional grinding wheels, which involves welding and bonding insert material to steel rings. Can be achieved with the grinding wheel of the present invention.

Within the scope of the above object, it is an object of the present invention to provide a grinding wheel which solves the problem of the connection between the steel ring and the aluminum cup. Another object of the present invention is to provide a grinding wheel that eliminates both steel rings and aluminum substrates or cups.

In particular, it is an object of the present invention to provide a grinding wheel which is reliable and relatively easy to manufacture and which can be manufactured at a competitive cost.

The above object and other objects to be made clear below can be achieved by the grinding wheel of the present invention. The grinding wheel of the present invention is, for example, a grinding wheel in which diamond used for grinding or polishing a smooth surface is fixed as an abrasive, and is made of a sintered abrasive insert material having a terminating portion, The terminating portion is provided with an engaging means and is embedded in the surface of the support made of a plastic material.

[0009]

DETAILED DESCRIPTION OF THE INVENTION Additional features and advantages of the invention will be apparent from the following description of a preferred embodiment of the grinding wheel of the invention. Although this embodiment is shown in the accompanying drawings, the present invention is not limited by such embodiment.

FIG. 1 is a perspective view of the cup type grinding wheel of the present invention, FIG. 2 is a plan view of the cup type grinding wheel of the present invention, and FIG.
2 is a partial sectional elevation view taken along the plane III-III in FIG. 2, FIG. 4 is a perspective view of a first type insert material having a dovetail-shaped termination, and FIG. It is a perspective view of the 2nd type insert material which has a termination part.

Explaining with reference to the drawings, the grinding wheel of the present invention comprises an insert material 1 made of a sintered abrasive material, and the insert material 1 is provided with a terminating portion 2. This termination 2 comprises engaging means and is embedded in the surface 3 of the plastics material support 4.

The placement of the insert 1 on the surface 3 depends on the application for which the grinding wheel is to be used (ie grinding or polishing application) and the type of surface to be treated (window glass, rock-like material, mirrors, etc.). Depends and is limited.

The grinding wheel may also be of the disk type, having an insert material applied on the circumference, gears on the periphery and any other suitable form.

The surface 3 is the flat upper rim of the support 4, which has a substantially cup-like shape and at its bottom 5 a hole 6 for connecting to a grinder.
Equipped with.

The engagement means of the insert 1 are each formed on each termination 2 and can have a dovetail form in the first embodiment (see FIG. 4), while at least in the second embodiment. It has one hole 7 (see FIG. 5). Other specific examples (not shown) may also have modifications of the terminating portion 2 having various shapes as long as the purpose is to engage the respective supports 4 of the respective insert materials 1.

The above-mentioned engagement means preferably contrast both the transverse thrust and the longitudinal thrust to which the insert is applied.

The plastic material forming the support 4 is
It consists of a phenolic resin filled with glass fiber and is therefore much lighter in weight than a combination of aluminum and steel, and also has a typical characteristic of phenolic resin, namely the heat which hardens the support 4 with increasing operating temperature. There is an advantage that curability can be used.

By embedding the end portion of each insert material 1 in the body surface 3, no other operation for welding the insert material or fixing the insert material is required, and as a result, the insert material according to the present invention is It is sufficient that the cup is housed in the recess formed in the mold.

In addition, the immobilization by embedding makes it possible to apply it to the grinding wheel with at least the same load as is applied to the conventional grinding wheel, and also supports 1 to 1 or more inserts 1 Can be prevented (in the present invention, this means withdrawal).

According to the present invention, it is possible to achieve the object of being effective and relatively simple in structure as compared with a known grinding wheel. Further, according to the present invention, it is possible to provide a grinding wheel in which the grinding insert material is substantially a single member with respect to the support body, by eliminating welding, bonding, and the use of steel and aluminum.

The materials and dimensions used can be varied insofar as they do not change the fact that the feature of the invention lies, in fact, in the insertion of the metal insert into the plastic body.

[Brief description of drawings]

FIG. 1 is a perspective view of a cup type grinding wheel of the present invention.

FIG. 2 is a plan view of the cup type grinding wheel of the present invention.

FIG. 3 is a partial sectional elevation view taken along the plane III-III of FIG.

FIG. 4 is a perspective view of a first type insert material having dovetail-shaped terminations.

FIG. 5 is a perspective view of a second type insert material having a holed termination.

[Explanation of symbols]

 1: Insert material 2: Termination part 3: Surface of support body 4: Support body 5: Bottom part 6: Hole 7: Through hole

Claims (5)

[Claims] 1. A grinding wheel comprising a sintered abrasive insert material having a terminating portion, the terminating portion having engaging means, and being embedded in the surface of a plastic support. . 2. Wheel according to claim 1, wherein the surface is the flat upper rim of a substantially cup-shaped support. 3. The grinding wheel according to claim 1, wherein the engaging means formed on the terminating portion is substantially dovetail-shaped. 4. The grinding wheel according to claim 1, wherein the engaging means formed on the termination portion is at least one hole formed in each insert material. 5. The grinding wheel according to claim 1, wherein the plastic material is glass fiber reinforced phenolic resin.