Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1991-06-20
1992-11-17
Kisliuk, Bruce M.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51240R, 51240A, 51 74R, 51102, 51128, 51137, 51215R, B24B 900, B24B 4106
Patent
active
051632497
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a guide for use in a grinding device, particularly for an abrasive belt grinder, the grinding tool of the grinding device having a traveling direction which is crosswise to the advancing movement, for advancing a piece to be worked, whose length to be worked exceeds the width of a grinding tool, relative to a grinding tool, or alternatively, for advancing a grinding tool relative to a piece to be worked in a manner that the point of contact and the angle of contact between a piece to be worked and a grinding tool are adjustable.
For example, when grinding the edges of plate-like pieces as described above, a problem is the strength of the abrasive belt since a piece to be worked can easily strike against the belt edge and the belt. Particularly, when working the edges of, e.g., glass or stone plates, which usually involves the use of valuable diamond-coated abrasive belts, such premature destruction of a belt incurs substantial economic costs.
SUMMARY OF THE INVENTION
In order to eliminate these drawbacks, an object of the invention is to provide a guide for adjusting the contact point and contact angle between a piece to be worked and a grinding tool such that it is virtually impossible for a piece to be worked to strike against the edge of an abrasive belt to break or, alternatively, to collide with the side edge of an abrasive disc. Another object of the invention is to provide a guide for precisely controlling the amount of material to be removed.
These objects are solved according to the invention by providing a guide which comprises a setting portion adjustable in its distance relative to a grinding tool, the setting portion being provided with an adjusting means which is fitted on either side of the grinding tool with at least one support braced against the edge to be worked in a piece to be worked and or against a separate steering element, which support is adjustable relative to the setting portion.
The adjusting means for controlling the contact angle between a workpiece and a grinding tool is, in one preferred embodiment of the invention, arranged in a manner that the adjusting means comprises a body portion journalled to be rotatably adjustable relative to an axle which is fixed relative to the setting portion, the supports being mounted on that body portion. Thus, the adjustment of the adjusting means is effected by means of a setting screw and a spring.
The setting portion for regulating the quantity of material to be removed is in one preferred embodiment of the invention arranged such that the setting portion is made adjustably rotatable relative to an axle which is fixed relative to the grinding device. Thus, the adjustment of the setting portion is effected by means of a setting screw and a spring.
The supports mounted on the adjusting means and braced against the edge to be worked in a piece to be worked and/or against a separate steering element are positioned on a common straight line. The support can be a sliding surface, a rotatably journalled roller or the like. The support may have a sliding surface, a roller or the like that can be made removable, whereby the necessary bracing can be readily varied according to dimensions and configurations of the piece to be worked.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail with reference made to the accompanying drawing, the sole FIGURE thereof showing in a diagrammatic plan view the operation of a guide of the invention in a case where a piece to be worked is advanced relative to a stationary grinding device.
DETAILED DESCRIPTION
Referring to the accompanying FIGURE, reference numeral 14 generally designates a grinding device provided with a shaft 15 for driving a grinding tool 3 indicated by reference numeral 3. The grinding tool 3 can be e.g. an abrasive belt fitted on top of an elastic drum or a belt rotating on two reversing wheels. The grinding tool can also be a fixed abrasive cylinder or a disc having only its cylindrical surf
REFERENCES:
patent: 155734 (1874-10-01), Klaber
patent: 2725691 (1955-12-01), Sommer
patent: 4924633 (1990-05-01), Hock
Kisliuk Bruce M.
Lavinder Jack
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