JPH0578474U - Conductive resin wheel - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a wheel that does not cause rust, has excellent strength, and can perform electric discharge machining. [Structure] Concentric circumferential grooves 4 having a diameter smaller than the outer diameter of the abrasive grain layer 2 embedded in the conductive resin layer 1 are provided in the upper and lower sides of the abrasive grain layer 2, and the reinforcing ring 3 is provided in the circumferential groove 4. Arranged. [Effect] It is lightweight and easy to handle, and since it does not rust and has excellent corrosion resistance, unlike conventional metal wheels, it does not become difficult to remove the wheel due to rust after use. Further, even if a crack is formed by chamfering or the like, the resin does not scatter around, which is safe for work. Further, since the wheel as a whole has excellent conductivity, even a resin wheel can be subjected to electric discharge machining.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a conductive resin wheel for grinding (chamfering) an end surface of glass.

[0002]

[Prior Art]

 Toughened flat or bent glass is used for window glass of automobiles, ships and trains. Recently, there is an increasing number of examples of using tempered glass for building materials.

The tempering treatment and bending of these glasses are performed by rapid heating to a temperature close to the softening point and subsequent rapid air cooling. In this case, small cracks or chippings on the edge surface of the glass cause cracks in the tensile stress region of the inner glass layer during the strengthening process, and damage the entire glass. Therefore, in order to remove cracks and chippings on this end face, the glass end face can be ground (chamfering) by using a metal bond diamond grindstone (chamfering wheel) having a diamond layer on a part of the outer periphery. Has been done.

Further, glass for side doors of automobiles, glass for audio equipment cases, etc. are often used with the glass end face exposed. In this case, the end face is rounded for aesthetic reasons. Form grinding is performed.

[0005]

[Problems to be solved by the device]

 However, since the chamfering wheel for the above grinding process is generally made of steel, it is heavy and inconvenient to handle, and if it is used for a long period of time, rust occurs due to the influence of cooling fluid etc. There was a drawback that it was difficult to remove.

On the other hand, when the wheel itself is made of resin, although the above drawbacks are solved, since the strength is low, there is a problem that cracks are likely to occur during the chamfering process, and as a result, the resin is easily scattered. .. In addition, resin wheels are complaining that they cannot be used for electrical discharge machining because they are less conductive than metal wheels such as steel.

The present invention has been made in view of the above circumstances, and is a conductive resin that is excellent in strength and can be subjected to electrical discharge machining while taking advantage of a resin that is lightweight, easy to handle, and does not cause rust. Intended to provide wheels.

[0008]

[Means for Solving the Problems]

 The conductive resin wheel according to claim 1, wherein diamond or c-BN abrasive grains are dispersed in a metal bond phase in a part of the outer periphery of the resin body in which the conductive fibers are uniformly dispersed. Embedding layers was used as a means to solve the problem.

As the conductive fiber, a copper wire, stainless steel, brass or the like is preferable in terms of conductivity and strength, and particularly stainless steel is suitable in terms of rust prevention.

In the conductive resin wheel according to a second aspect of the present invention, concentric circumferential grooves each having a diameter smaller than the outer peripheral diameter of the abrasive grain layer are provided above and below the embedded abrasive grain layer, and reinforcement is provided in the circumferential groove. Arranging a ring was used as a means to solve the problem.

In the conductive resin wheel according to the third aspect of the invention, the annular reinforcing member is provided inside the resin body, which is a means for solving the problem.

The annular reinforcing material is preferably formed by a Bakelite disc or a mesh body.

[0013]

According to the structure of the invention described in claim 1, since most of the wheel is made of resin, the wheel is lightweight and easy to handle, and it does not cause rust and has excellent corrosion resistance. In addition, since the conductive fibers are uniformly dispersed in the resin body, the wheel as a whole has excellent conductivity and electrical discharge machining can be performed.

According to the configurations of the inventions described in claims 2 and 3, it is possible to further reinforce the resin main body having low strength, and it is possible to prevent the resin from scattering even when a crack is formed by chamfering or the like.

[0015]

【Example】

 Hereinafter, the conductive resin wheel of the present invention will be described in detail with reference to the drawings. 1 and 2 show an embodiment of the conductive resin wheel of the present invention. In this conductive resin wheel, the abrasive grain layer 2 is formed in a part of the outer circumference of the annular conductive resin body indicated by reference numeral 1.

The conductive resin body 1 is made of FRP (fiber reinforced plastic) reinforced with a conductive fiber such as stainless steel.

The abrasive layer 2 is made of diamond or c-BN superabrasive dispersed in a metal bond phase.

Further, reinforcing rings 3 are arranged above and below the abrasive grain layer 2 in grooves 4 concentrically provided with a diameter smaller than the outer peripheral diameter of the abrasive grain layer 2, respectively.

Since such a conductive resin wheel is formed of the resin main body 1, it is lightweight, has excellent handleability, does not cause rust, and has excellent corrosion resistance. For this reason, the wheel can be easily removed, and unlike conventional metal wheels, rust does not make it difficult to remove the wheel after use.

Further, in this wheel, since the resin main body 1 is provided with the conductive fiber, the wheel as a whole has excellent conductivity, and even the resin wheel can perform electric discharge machining.

In addition, since it is reinforced with the conductive fiber and the reinforcing ring 3 is arranged, even if a crack is generated by chamfering etc., the resin does not scatter around and it is safe in operation. ..

FIG. 3 shows another example of the conductive resin wheel of the present invention. This example is different from the conductive resin wheel of the above example in that an annular reinforcing member 6 formed of a Bakelite disc or the like is arranged inside the resin main body 1.

According to this conductive resin wheel, the same effects as those of the conductive resin wheels of FIGS. 1 and 2 can be obtained, and the shrinkage amount when forming the resin main body 1 by injection molding can be reduced. It also has advantages.

[0024]

[Effect of the device]

 As described above, the conductive resin wheel of the present invention has the following effects.

Since it is lightweight and easy to handle, and does not rust and has excellent corrosion resistance, unlike conventional metal wheels, rust does not make it difficult to remove the wheel after use. Since the wheel as a whole has excellent electrical conductivity, even a resin wheel can be electro-discharge machined. If a reinforcing ring or reinforcing material is provided, the resin will not scatter around even if cracks occur due to chamfering, etc., which is safe for work.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a conductive resin wheel of the present invention.

FIG. 2 is an explanatory view showing a main part of this conductive resin wheel.

FIG. 3 is a cross-sectional view showing another example of the conductive resin wheel of the present invention.

[Explanation of symbols]

 1 Resin Body (Containing Conductive Fiber) 2 Abrasive Grain Layer 3 Reinforcing Ring 4 Circumferential Groove 6 Reinforcing Material

Claims (3)

[Scope of utility model registration request] 1. An annular abrasive grain layer in which diamond or c-BN abrasive grains are dispersed in a metal bond phase is embedded in a part of the outer periphery of a resin body in which conductive fibers are uniformly dispersed. Conductive resin wheel characterized by. 2. The above-mentioned embedded abrasive grain layers are provided with concentric circumferential grooves each having a diameter smaller than the outer circumferential diameter above and below the abrasive grain layer, and reinforcing rings are arranged in the circumferential grooves. The conductive resin wheel according to claim 1. 3. The conductive resin wheel according to claim 1, wherein an annular reinforcing member is provided inside the resin body.