JPS6144781Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a cylindrical grinding wheel, and aims to effectively prevent self-excited vibration of the grinding wheel, which is one of the causes of chatter that occurs on the grinding surface of a workpiece, and to provide a vibration damping member. The purpose is to prevent peeling and falling off.

This self-excited vibration of the grinding wheel is caused by the different resistance forces generated between the cutting edge of each abrasive grain and the workpiece material during grinding, as well as the fluctuation of resistance force due to the difference in the spacing between the cutting edges. It is thought that the cause is the generation of minute vibrations with a value close to the natural frequency, and the self-excited vibrations are particularly likely to occur in grindstones whose base material is a metal wheel-shaped member.

In addition, the self-excited vibration of the grindstone not only causes chatter, but also causes the atmosphere to vibrate at high frequencies, producing a unique unpleasant sound.

However, the grindstone using the metal wheel-shaped base material uses less abrasive grains, and it is easy to control balance and roundness with high precision, so it has excellent grinding performance and is low cost. It's advantageous.

In order to prevent the self-excited vibration of the grindstone, it is preferable to integrally attach a vibration damping member such as rubber to the side surface of the wheel-shaped base material. However, if the mass of the vibration damping member is increased in order to make the vibration prevention effect more effective, the centrifugal force generated by the high-speed rotation of the grinding wheel will also increase, and there is a risk that the vibration damping member may peel off due to the action of the centrifugal force. There is.

This proposal was proposed in view of the above points, in which abrasive grains 2 are bonded in a single layer to the outer circumferential surface of a metal wheel-shaped base material 1, and vibration damping layers are attached to both sides of the wheel-shaped base material 1. For example, elastic members 3, 3 made of rubber or the like are integrally provided so as to protrude outside the abrasive surface width, and vibration damping members 3, 3 on both sides are provided through a plurality of through holes 5 provided on the side surface of the wheel-shaped base material 1. It is characterized by being connected.

The single-layer abrasive grain layer 2 binds ultra-hard abrasive grains such as diamond or cubic boron nitride, and may be formed not only on the outer peripheral surface of the base material 1 but also continuously from the outer peripheral surface to the peripheral edge of the side surface. . In this case, it goes without saying that the vibration damping member 3 is arranged inside the peripheral abrasive grain layer.

The base material 1 and the vibration damping member 3 can be fixed by placing the base material 1 in the center of the mold, in addition to bonding with adhesive.
It is optional to inject and solidify molten rubber, synthetic resin, etc. on both sides. In the case of cast molding, if an adhesive is applied to the base material 1 in advance, the base material 1 and the vibration damping member 3 will be fixed more reliably. If necessary, a flange 6 for receiving the outer peripheral edge of the vibration damping member 3 is provided protrudingly on the peripheral edge of the side surface of the base material 1.

When the cylindrical grinding wheel using the metal wheel-shaped base material 1 is configured as described above, the minute vibrations generated on the grinding surface during grinding are damped by the damping member 3 before approaching the natural frequency of the base material 1. The stone does not cause self-excited vibration. Therefore, there is an effect that chatter of the grinding surface and high frequency noise are not generated.

Since the vibration damping member 3 has a large mass by protruding beyond the width of the abrasive surface, the effect of preventing the self-excited vibration is great.

The centrifugal force increases due to the increase in the mass of the vibration damping member, and the vibration damping member 3 is pulled outward by the action of the centrifugal force. Since it is integrated by the connecting part ₃₁ which fills the area, there is no risk of it peeling off or falling off.

[Brief explanation of the drawing]

FIG. 1 is a front view of the proposed grindstone, and FIG. 2 is a longitudinal sectional view taken along the line shown in FIG. 1. 1 is a metal wheel-shaped base material, 2 is a single layer abrasive grain layer, 3 is a vibration damping member, 3 ₁ is a connecting portion, 5 is a through hole, 6
is a flange.

Claims (1)

[Scope of utility model registration request] Abrasive grains are bonded in a single layer to the outer peripheral surface of a metal wheel-shaped base material, and vibration damping members are integrally provided on both sides of the wheel-shaped base material so as to protrude beyond the width of the abrasive surface. A cylindrical grinding wheel that connects vibration damping members on both sides through multiple through holes.