JPH0683963B2 - Low Noise Shock Absorption Type Grinding Wheel Using Floating Polishing Element and Its Manufacturing Method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a wet polishing grindstone that disperses and absorbs vibrations and impacts having a wide range of frequencies, and a method for manufacturing the same.

<Prior Art> A conventional wet-grinding grindstone using a polishing element is one in which the polishing element 1 is welded and fixed to a supporting substrate 3 with a silver braze as shown in FIG. 9, or the polishing element 1 is once supported as shown in FIG. Piece P
In some cases, the piece P is welded to the support substrate 3 of Bakelite with an adhesive and the periphery of the polishing element 1 is filled with a filling shape retention material 4.

<Problems to be Solved by the Invention> However, in such a method, since the vibration on the machine side of the polishing machine and the impact and vibration on the surface of the stone material of the object to be polished are all transmitted to the polishing element 1, The surface of the stone, which is the body, is subjected to excessive grinding, chips occur in the peripheral part, etc.,
At the corners, the phenomenon of sagging due to overcutting occurs. In order to solve these problems, the applicant has already filed an application in Japanese Utility Model Laid-Open No. 63-97458 (hereinafter referred to as prior application technology), but in the case of prior application technology, the above-mentioned drawbacks Has been greatly improved and has been well received, but since the polishing element 1 is merely placed in the molding frame A, there is no concern that it will fall off because the surrounding resin largely envelops the polishing element 1. At the end of use, when the thickness of the polishing element 1 becomes 1 mm or less, it sometimes peels off.

If a flat piece is attached to the back surface of the polishing element 1 to prevent the falling off, the freedom of the polishing element 1 in the vertical direction is impaired and the falling off is stopped, but it is effective in absorbing shock and vibration. .

In addition, regarding the damage of the stone and the grindstone due to excessive movement of the grindstone (protruding too much from the stone), the stone is largely broken and the tip of the grindstone is shattered with the conventional one, resulting in great damage. .

As other prior application techniques, there are JP-A-62-176770 and JP-A-62-25156.

The present invention is to solve these problems, shock and vibration, dispersed absorption of noise, and low noise shock absorption type grindstone by a floating type polishing element that can completely prevent the polishing element from falling off. The purpose is to provide a manufacturing method.

<Means for Solving the Problem> In the means for solving the problem according to the present invention, as shown in FIGS. 1 to 6, a protrusion 2 is fixed to a back surface 1b of the polishing element 1 opposite to the polishing surface 1a. A grindstone characterized in that the three parts of the surface of the element 1 except the polishing surface 1a and the supporting substrate 3 are filled with a shape-retaining material 4 which is softer than the polishing element 1 and also serves as an impact absorbing material and for fixing. Is.

Then, the molding frame A is formed in a circular tray shape, the protrusion 2 is fixed to the back surface 1b of the polishing element 1 opposite to the polishing surface 1a, and the polishing surface 1a of the polishing element 1 is set on the bottom surface C of the molding frame A. The liquid filling shape retention material 4 softer than the polishing element 1 is placed between the inner peripheral surface E of the molding frame A and the surface of the polishing element 1 excluding the polishing surface 1a. It is a method for producing a grindstone, which is characterized in that the grindstone is filled and hardened, and after the hardening, a low noise shock absorbing grindstone is taken out.

<Operation> In the above problem solving means, the protrusion 2 provided on the polishing element 1
Is for the purpose of preventing falling, and if it is too large, it will impede the absorption and dispersion of shock and vibration, and if it is too small, the falling prevention effect will be weakened, and if it extends in the upper direction, shock, A large amount of the vibration-preserving shape retention material 4 is used. By using the resin 4A of the filling shape-retaining material 4 for absorbing and fixing shock and vibration, the shock and vibration F1 from the upper rotating machine is generated in the circumferential direction by utilizing the surface area of the supporting substrate 3 such as the disk-shaped iron. Run away S1, disperse and absorb, and
Complete removal prevention. In particular, continuous vibration and lateral stress F2 at the time of sliding due to the disturbance of the stone surface of the material to be polished is mainly absorbed by the filling shape retention material 4B on the side part, and the upper and lower impacts F2 due to the large unevenness are highly elastic, High viscosity filled shape retention material 4A
Let it escape.

<Examples> Examples of the present invention will be described below with reference to the drawings. First,
A low noise shock absorption type grindstone by the floating type polishing element of the first embodiment will be described with reference to FIGS. 1, 4, 5 and 6, which comprises a number of rectangular parallelepiped polishing elements 1 (polishing chips made of metal-bonded sintered diamond). The so-called metal tip, etc. (artificial diamond has a size of a few microns) is fixed to the back surface 1b on the opposite side of the polishing surface 1a (the artificial diamond is several microns), and the projection 2 and the polishing surface 1a of the polishing element 1 are excluded. The space between the surface and the rotating disk-shaped support substrate 3 is filled with a shape-retaining material 4 which is softer than the polishing element 1 and has a peripheral circular filling shape-holding material 4 which also serves as an impact absorbing material.

In the figure, 5 is a central hole, 6 is a dividing groove, and 7 is a large number of hollow concave holes.

The protrusion 2 is, for example, an iron wire rod having a diameter of 3.2 mm, and 2a is a melting and solidifying point of the protrusion 2 during welding.

Although the number of the polishing elements 1 is eighteen, actually, it is better to evenly distribute the polishing elements 1 as small as possible (the sides of the polishing surface 1a are, for example, 2 to 3 mm). .

As the filling shape-retaining material 4, a high-viscosity resin containing stone powder or the like or a cement containing a rubber foaming agent is used. When the rubber or resin liquid flowing around the polishing element 1 as the filling shape-retaining material 4 is kneaded with a highly water-soluble granular substance, when the grindstone of the present invention grinds stone materials, contact As the covering is ruptured on the surface and melts out in water and becomes hollow, and the smaller the mesh mesh number becomes, the state in which the surrounding shape-retaining material 4 interferes with the blade and causes defective cutting can be greatly improved.

The more the water-soluble substance to be kneaded, the closer to the bare state of the polishing element 1, but this phenomenon occurs only on the surface in contact with the stone, so the polishing element 1 is filled with the shape-retaining material 4. I was able to get more sharpness without impairing the purpose of solidification.

Next, referring to FIG. 2, a method of manufacturing a low noise impact absorbing type grindstone by the floating type polishing element of the first embodiment will be described. This is a metal (or rubber) mold form A with a center cylinder B and a circle. It is formed in a tray shape, and a circular rod-shaped projection 2 is fixed to the back surface 1b opposite to the polishing surface 1a of the rectangular parallelepiped polishing element 1, and the polishing surface 1a of the polishing element 1 is brought into contact with the bottom surface C of the molding frame A to form a radial shape Placed on the bottom surface C of the molding form A, a large number of pins D are appropriately fixed and arranged,
Inner peripheral surface E of molding form A, polishing surface of projection 2 and polishing element 1
A liquid filling shape retention material 4 which is softer than the polishing element 1 is filled between the surfaces excluding 1a and is hardened (solidified), and the support substrate 3 is placed thereon before the hardening, and after the hardening. It is characterized by taking out a low noise shock absorbing grindstone.

G is a cover of the molding frame A, and H is a groove plate on the bottom surface of the molding frame A.

Next, the operation of the low noise shock absorbing type grindstone will be described. The projections 2 provided on the polishing element 1 are intended to prevent falling off. If they are too large, they will interfere with absorption and dispersion of shocks and vibrations, and if they are too small. Then, the fall-off preventing effect is weakened, and when extended in the upper direction, the impact- and vibration-filling shape-retaining material 4 (4A is mechanically strong, different from 4B on both sides of the polishing element 1). A shock-absorbing epoxy resin may be used, in which case the portion 4A and the supporting substrate 3 may be integrally formed of resin).
Taking these into consideration, the smallest material has the greatest holding effect,
In order to disperse shocks and vibrations better, a steel wire (so-called a wire) having a diameter of several mm and a length substantially the same as the length of the polishing element 1 is placed on the upper surface of the polishing element 1 and one end thereof is dimensioned. By the resin 4A of the filling shape-retaining material 4 which is fixed to the polishing element 1 by welding and also serves as an absorber of shock and vibration, the surface area of the supporting substrate 3 such as a disk-shaped iron is used to shock from the upper rotating machine, Vibration F1 is allowed to escape in the circumferential direction, S1 is dispersed and absorbed, and
The prevention of dropout is complete. In particular, continuous vibration and lateral stress F2 at the time of sliding due to the disturbance of the stone surface of the material to be polished is mainly absorbed by the filling shape retention material 4B on the side part, and the upper and lower impacts F2 due to the large unevenness are highly elastic, It is possible to escape by using the high-viscosity filled shape retention material 4A.

Next, referring to FIGS. 7 (a) and 7 (b), a second embodiment of the low noise shock absorbing grindstone using the floating polishing element of the present invention and its manufacturing method will be described. This is compared with the first embodiment. The shape-retaining material 4 on the side of the polishing element 1 is formed thin, and the molding frame A is made of rubber. The amount of the shape-retaining material 4 is larger than that in the first embodiment. However, the low noise impact absorption function is slightly reduced.

As can be seen from the above description, the effects of the embodiments of the present invention are summarized in the following items.

(A) When the protrusion 2 is a circular bar, even if it has a diameter of 3.2 mm, its circumference is approximately three times as large and has the same surface area as an instruction piece with a width of 10 mm, so that it can be completely prevented from falling off.

(B) When the protrusion 2 is formed into a circular bar, the effect of absorbing and dispersing shock and vibration becomes greater.

(C) As a result, only one side of the circular rod is welded, so in the unlikely event of excessive work of the grindstone (projection of the material to be polished from the stone, etc.)
The stone and the grindstone are damaged only by the lack of the polishing element 1 on the grindstone side, and the stone is not unexpectedly chipped.

(D) In the unlikely event that the chip that was missing is a polishing element 1
Since it is taken out in its original form without being shattered, it can be remanufactured and the economic effect is great.

Further, the polishing element 1 and the protrusion 2 may be integrally molded as in the third embodiment of FIGS. 8 (a) and 8 (b). That is,
When the artificial diamond is sintered with powder metal, it is made into a flat sugar shape with a diameter of several mm, and these are kneaded with a liquid filling shape retention material softer than the polishing element 1 to form the inner peripheral surface of the molding frame. Adopting a manufacturing method of a grindstone that fills the inside, hardens it, places the support substrate 3 before the hardening, and takes out the low noise shock absorbing grindstone after the hardening, the polishing function is improved by simple work. .

It should be noted that the present invention is not limited to the above-mentioned embodiment, and it goes without saying that many modifications and changes can be made to the above-mentioned embodiment within the scope of the present invention, and the bottom of the filled shape-retaining material,
The support substrate and the resin may be integrally formed, and the protrusions may have a shape other than a circular rod.

<Effects of the Invention> As can be seen from the above description, the present invention grindstone, the protrusion is fixed to the back surface of the polishing element opposite to the polishing surface, the projection and the surface other than the polishing surface of the polishing element and the support substrate. The three parts are characterized in that they are softer than the polishing element and are filled and shaped with a filling shape-retaining material that also serves as an impact absorbing material.

Therefore, in the present invention, conventionally, the projections provided for the purpose of preventing the falling-off are holding the grindstone as a product as an example, and hitting one polishing element with a hammer, the more the polishing element is knocked, the more the polishing element is filled and shaped. It absorbs this shock as if it were buried in the material. Even in actual use, if it hits the convexity of a stone, the polishing element that hits it as a conventional one is pushed up, and the polishing element on the opposite side of 180 degrees moves excessively downward. Since it moves, it has a poor flatness as if it bites into it, but with the present invention, these are greatly improved by orders of magnitude. Also, the effect of low noise is clearly different by hearing, and when the walls are separated from each other, there is such a difference that it is impossible to know whether or not the machine is operating.

As described above, according to the present invention, it is possible to disperse and absorb shock, vibration, and noise, and completely prevent the polishing element from falling off.

Further, in the method of the present invention, the polishing surface of the polishing element may be brought into contact with the bottom surface of the molding frame and radially mounted, so that there is an excellent effect that a grindstone can be manufactured extremely easily.

[Brief description of drawings]

FIG. 1 is a perspective view of a low noise impact absorbing grindstone using a floating polishing element according to a first embodiment of the present invention, FIG. 2 is a perspective view of the same molding frame, and FIG. Sectional view, 4th
FIG. 5 is a front view of a polishing element and a protrusion, FIG. 5 is a side view thereof, FIG. 6 is a plan view thereof, and FIG. 7 (a) is a low noise shock absorption by a floating polishing element of a second embodiment of the present invention. Shaped stone perspective view,
FIG. 7 (b) is a sectional view of a forming frame and a grindstone, and FIG. 8 (a) is a perspective view of a low noise impact absorbing grindstone using a floating polishing element according to a third embodiment of the present invention. FIG. 9B is a sectional view of the grindstone, and FIGS. 9 and 10 are perspective views of the conventional grindstone. 1: Polishing element, 1a: Polished surface, 1b: Back surface, 2: Protrusion, 3: Support substrate, 4:
Liquid filled shape retention material, A: Molding form, B: Central cylinder, C: Bottom, D: Pin, E: Inner peripheral surface.

Claims (2)

[Claims] 1. A projection is fixed to the back surface of the polishing element opposite to the polishing surface, and the three parts of the projection, the surface other than the polishing surface of the polishing element, and the support substrate are softer than the polishing element and are shock absorbing materials. A low noise shock absorbing grindstone with a floating polishing element, which is filled and shaped with a filling shape-retaining material that also serves as a sticking agent. 2. A molding frame is formed in a circular tray shape, a protrusion is fixed to the back surface of the polishing element opposite to the polishing surface, and the polishing surface of the polishing element is placed in radial contact with the bottom surface of the molding frame. Place it, and fill the shape-retaining material softer than the polishing element between the inner peripheral surface of the molding frame and the surface of the polishing element other than the polishing surface of the polishing element to cure it, and to reduce noise after curing. A method of manufacturing a whetstone characterized by taking out a shock absorbing whetstone.