JPS614667A - Wheel cutting device - Google Patents

Abstract

PURPOSE:To make a wheel edge part formable to the desired radius so simple and excellent in operability, by adjusting a distance between a diamond at a point tip and a turning center of a point holder situated in an axial direction of the tip side. CONSTITUTION:A point holder 14 is placed on an upper base block 15, and when a handle 14b is moved as in an arrow, the holder 14 is made turnable round along a turning guide 22. Here, a tip end of a point 13 is locked so as to come to a more retracted position than a turning center O of the holder 14, while an edge part of a rotating wheel 18 is inserted thereinto, and when the holder is rotated while cutting the edge part of the wheel 18 with a top of the point 13, a convex radius 18a is formed in the edge part of the wheel 18, and a distance between the tip of the point 13 and the turning center O is altered whereby the optional, radial convex radius 18a is formable. Next, the tip of the point 13 is set to a more projected position than the turning center O, and when the holder 14 is rotated, a concave radius is formable in the edge part of the wheel 18 so simple and excellent in operatability.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a grindstone cutting device for forming the edge of a grindstone used in a grinder into a desired radius.

"Prior Art and its Problems" Conventionally, in the fine finishing of high hardness materials such as molds, a grinding machine that rotates a grinding wheel to scrape off the material has been generally used. The edges of grindstones used in grinding machines are formed into various shapes depending on the purpose. For example, those with a tapered cross section, those with a convex radius, and those with a concave radius are used.

In this way, in order to make the edge of the grindstone into the desired shape,
A point with a diamond at the tip (diamond dresser) is used. That is, a point is attached to a projection type grinder, the shape of the edge of the grinding wheel and the position of the tip of the point are enlarged and projected onto a screen, and the grinding process is performed by contouring with the tip of the point on the edge of the grinding wheel.

However, in the above-mentioned grindstone cutting method, the edge of the grindstone is scraped point by point along the desired shape with the tip of the point, so it takes a lot of work to form a subtle radius. There were disadvantages in that it was time consuming and required considerable skill.

[Object of the Invention] An object of the present invention is to provide a grindstone cutting device that can form the edge of a grindstone into a desired radius more easily and with good workability.

"Structure of the Invention" The grindstone cutting device of the present invention comprises a point having a diamond at the tip, a point holder that holds the point so as to be slidable in the axial direction, and a base to which the point holder is rotatably mounted. The point holder is attached to the base so as to rotate around a point located in the axial direction on the tip side of the point, and the edge of the grindstone is inserted toward the center of rotation. An insertion part for the reservoir is formed.

Therefore, by installing this device on a projection grinding machine, for example,
With the tip of the point retracted from the rotation center of the point holder, insert the edge of the rotating whetstone from the insertion part, and rotate the point holder while sharpening the whetstone with the tip of the point. A convex radius is formed in the part. Furthermore, if the edge of the whetstone is similarly sharpened with the tip of the point protruding from the center of rotation of the point holder, a concave radius will be formed at the edge of the whetstone. In this case, the radius of the radius can be arbitrarily set by appropriately adjusting the distance between the tip of the point and the center of rotation of the point holder. Furthermore, by cutting while changing the distance between the tip of the point and the center of rotation of the point halter, it is possible to form a complex curved surface consisting of continuous rounds with different radii.

“Embodiments of the Invention” As shown in FIG. 1, a grindstone cutting device 1 implementing the present invention
1 consists of a point 13 having a diamond 12 at the tip, a point holder 14, an upper base 15 and a lower base 16. The point 13 is attached to the point holder 14 so as to be slidable in the axial direction, and the sliding position is determined by a stopper screw 17 provided on the point holder 14.
It is fixed by The point holder 14 has an arc-shaped arm +4a and this arm 1.
The inside of the arm 14a is an insertion part A into which the edge of the grindstone 18 is inserted.
is doing. Note that the point 13 is attached such that the center of the arc of the arm 14a is located in the axial direction on the tip side thereof. The upper base 15 has an approximately horseshoe shape as a whole, and a rotation guide 2 having an arc shape is provided inside the notch.
The rotation guide 22 is fixed by a screw 23 inserted from the rear end of the upper base 15. The upper edge of the rotation guide 22 protrudes from the upper surface of the upper base 15, and is adapted to fit around the inner periphery of the arm 14a.

The inside of this rotation guide 22 forms an insertion part A into which the edge of the grindstone 18 is inserted. The - part base 15 is fixed to the lower base 16 by screws 19.18. is formed, and a notch groove 18b into which a mounting screw 20 is inserted is formed at the rear end.The lower base 16 is mounted to the workpiece installation surface 21 of the projection grinder using the screw 20. It is now possible to

In the structure of the bristles, the arm of point halter 14 +
The point holder 14 is installed on the upper base 15 without fitting the upper edge of the rotation guide 22 to the inner periphery of the rotation guide 4a.

In this state, the point halter 14 can be rotated along the rotation guide 22 by moving the handle 14b as shown by the arrow in the figure. Therefore, as shown in Fig. 2, the tip of the point 13 is fixed with the stopper screw 17 so that it is retracted from the center of rotation O of the point holder 14, and in this state, the edge of the rotating whetstone 18 is inserted. Then, when the point holder 14 is rotated while cutting the edge of the whetstone 18 with the tip of the point 13, the whetstone 1
8 has a convex radius 18a as shown by the broken line in the figure.
or formed. In this case, a convex radius 18a having an arbitrary radius can be formed by changing the distance between the tip of the point 13 and the center of rotation 0. If a workpiece is cut using the grindstone 18 having a convex radius 18a formed on its edge, a concave radius with the same radius will be formed on the workpiece.

In addition, as shown in FIG.
7, insert the edge of the rotating whetstone 18 in this state, and rotate the point holder 14 while scraping the edge of the whetstone 18 with the tip of the point 13.
At the edge of , there is a concave radius 18b as shown by the broken line in the figure.
is formed. In this case, a concave radius 18b having an arbitrary radius can be formed by changing the distance between the tip of the point 13 and the center of rotation 0. If a workpiece is cut using the grindstone 18 having the concave radius 18b formed on the edge thereof, a convex radius with the same radius will be formed on the workpiece.

Furthermore, by sliding the point 13 in the axial direction and partially changing the distance between the tip of the point 13 and the center of rotation 0, the edge of the grinding wheel 18 is shaved, resulting in a complex series of radiuses with different radii. It is also possible to form curved surfaces. By the way, the rotating kite 22 may be damaged by being hit by the grindstone 18, but in that case, the screw 23 can be removed and the rotating guide 22 can be replaced.

In addition, in the above embodiment, the shape of the arm 14a of the point Porgoo 14 does not necessarily have to be an arc shape,
For example, it may be opened in a Y-shape. In that case, the point halter 14 can be rotated by moving the handle 14b while bringing the inner periphery of the 17-shaped arm into contact with the rotation guide 22 on the upper base 15.

"Effects of the Invention" As explained above, according to the present invention, with a simple operation,
The edge of the grindstone can be formed into a desired radius with good workability. When a workpiece is cut using this grindstone, a radius opposite to the radius formed at the edge of the grindstone is formed on the workpiece, making it easier to cut the workpiece.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the grindstone cutting device according to the present invention, and FIGS. 2 and 3 are partially enlarged plan views showing how the grindstone cutting device δ is used. In the figure, 11 is a grindstone cutting device, 12 is Guyamondo, and 13
is a point, 14 is a point halter, 115 is an upper base, 16 is a lower base, 18 is a grindstone, 22 is a rotation guide, A
is the insertion part.

Claims (1)

[Claims] The point holder includes a point having a diamond at the tip, a point holder that holds the point so as to be slidable in the axial direction, and a base to which the point holder is rotatably mounted, and the point holder is attached to the shaft on the tip side of the point. A whetstone, which is attached to the base so as to rotate about a point located in a direction, and has an insertion portion for inserting an edge of the whetstone toward the center of rotation. cutting equipment.