JPS60177851A - Supporting blade of centerless grinder - Google Patents

Abstract

PURPOSE:To improve antiexfoliation performance by forming an L-shaped groove onto the contact surface at the top edge part of the supporting blade of a centerless grinder and attaching a ceramic tip by the adhesion through a rubber elastic film having a specific thickness or less, thus providing vibrationproofness for the supporting blade. CONSTITUTION:A ceramic tip 2 is fitted into an L-shaped groove 3 formed onto the contact surface at the top edge part of the supporting blade of a centerless grinder, and at least the bottom contact surfaces of the contact surfaces between the groove 3 and the tip 2 are attached each other by the adhesion through a rubber elastic film 4 having a thickness of 0.3mm. or less. Though the supporting blade body 1 and the ceramic tip 2 expand and contract according to the rise and lowering of temperature, and a strain due to the difference of the thermal expansion coefficient generates in the boundary part this strain can be absorbed by the intermediate rubber elastic film, and the defects such as exfoliation is not generated. Further, since the rubber film is exceedingly thin in 0.3mm. or less, the rubber film can act intergrally with the supporting blade body part against an external force.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a support blade of a centerless sander.

Conventional centerless supported blades use cemented carbide tips for the purpose of being ground.

Although cemented carbide has the best wear resistance among metal materials, it is not necessarily satisfactory for such uses. Problems remain regarding Si resistance and properties. Currently, even higher wear resistance is desired.

Ceramic materials are most preferred for this purpose, but they have the following problems.

That is, it is difficult to join the supporting blade body, and mere adhesion will cause the blade to peel off. For this reason, it is difficult to simply replace cemented carbide with ceramic.

The present invention was made in view of the current situation, and
The present invention aims to solve the above-mentioned problems and to provide a new structure with significantly improved precision in grinding.

A feature of the present invention is to avoid directly bonding the ceramic chip and the metal body with an adhesive, and instead use a rubber elastic membrane (
The film thickness is 0.3 mm or less, most preferably 0.15 mm or less, and adhered to absorb the strain at the boundary caused by the difference in linear expansion coefficient between the two. The elastic membrane also absorbs shock during use, providing vibration resistance and improving ITL peelability.

In addition, new knowledge has been discovered that when the thickness of the rubber film is reduced to 0.3 mm or less, there is no dimensional change in the joint, and the polishing accuracy is more than twice that of conventional products. It is against this background that the present invention was made.

The present invention has the above-mentioned characteristics, and the gist thereof is that the support blade tip of the centerless sander is
A ceramic chip (2) is fitted into an L-shaped groove (3) formed in the shape and arrangement as shown in the figure, and at least the bottom of the contact surface between the groove and the chip is machined. This is a support blade for a centerless sander characterized in that the contact surfaces are adhesively bonded to each other via a rubber elastic membrane (4) having a thickness of 0.3 to 1 or less.

Next, the present invention will be explained with reference to the drawings.

1 and 2 are explanatory diagrams of the cross-sectional structure of the present invention.

(1) is the support blade body, and (2) is the ceramic chip.

At the tip of the main body (1), an L-shaped groove (3) is formed with a neck shape and arrangement as shown in the figure, and the tip (2) is fitted into this groove.

Only those that were adhered through this thin film (.

In both cases, the chip is glued to the body at least at the bottom contact surface, which satisfies the intended purpose. However, considering mechanical strength, etc., it is preferable that the entire support blade be connected via this thin film as in the case of Fig. 1. As the material expands and contracts, distortion occurs at the boundary due to the difference in expansion coefficients, but this is absorbed by the intermediate rubber elastic film, and accidents such as peeling do not occur. In addition, the rubber film is actually 0.3
Since it is in the 41F state below the wound (preferably below 0.15 mπ), it can behave integrally with the supporting blade main body even in response to external forces. Despite the presence of the rubber membrane, it can behave as if it were not intervening. Therefore, there is no dimensional change in the joint portion, and high dimensional accuracy can be obtained.

In addition, despite the presence of the rubber film, the polishing accuracy of the object to be polished does not suffer from any damage, and on the contrary, the machining accuracy is twice as high as that of a structure made of ordinary cemented carbide brazed. This results in an effect of further improvement.

In other words, by joining the rubber films (thickness: 0.3W or less) across the middle, the processing accuracy can be improved by more than twice. Incidentally, to give one example, the roundness of carbide brazed type is 0.4. tt is 0.2b in the present invention.N surface roughness is 0.6ga in the conventional product and 0.45tL in the present invention.

Although the shapes of the ceramic chips are changed in Figures 1 and 2, these are merely examples of the types of chips that are normally used, and there is no special relationship between the shape and the bonding structure. That doesn't mean there is.

The chip shown in FIG. 1 is a thin chip with diameter Koyanagawa.

There are no restrictions on the material of the ceramic chip used in the present invention, and in general, oxides such as alumina, other carbides, fertilized materials, etc. can be used.

In order to bring the rubber film, base material, and ceramic plate into close contact with each other, pressure is applied to the bonded portion to cause elastic flow in the rubber film, and 'fjM' is performed. In this way, complete bonding is achieved and elastic flow remains in the rubber membrane after adhesion, so that the relative strength of the membrane is improved.

As for the thickness of the rubber film, if a method utilizing elastic flow is adopted, a thickness of substantially 0.3 to 1 or more can be used. This is because the effect of the present invention will be apparent if the elastic flow due to pressurization is substantially 0.3 or less (most generally 6.15ti+n or less). Strictly speaking, there are no restrictions at all as long as the properties of a rubbery elastic body are exhibited.

As detailed above, the present invention is a support blade with a new structure that can maximize the wear resistance of ceramic without causing peeling, and has practical features such as lower cost than conventional products. It also has

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams of the cross-sectional structure of the present invention, in which (1) is the supporting blade body, (2) the U ceramic chip, and (3) is the L
The mold groove (4) is a rubber elastic membrane. Patent applicant Akita Co., Ltd. Representative Yoshimasa Kubo μs1 Team 2

Claims (1)

[Claims] Ceramic chips (2) are fitted into L-shaped grooves (3) formed in various shapes and arrangements as shown in Figs. The center has a structure in which at least the bottom contact surfaces of the contact surfaces of the groove and the chip are adhesively bonded to each other via a rubber elastic membrane (4) having a thickness of 0.3 mm or less. Support blade for less sanding machine.