JP2003333808A - Tile-shaped magnet and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tile-shaped magnet which is excellent in yield in manufacturing the tile-shaped magnet which is applied to an AC servo motor used for a semiconductor manufacturing device or the like where precise positioning is requested, and to provide its manufacturing method. <P>SOLUTION: The tile-shaped magnet 1 whose topside 1a and under side 1b are circular is constituted with the radius Ra of the circular arc of the topside 1a and the radius Rb of the circular arc of the under side in the same dimensions. Moreover, the tile-shaped magnet 1, which is constituted with the radius Ra of the circular arc of the topside 1a and the radius Rb of the circular arc of the under side in the same dimensions, is manufactured by dividing a base material magnet 1 in a block form into a plurality of pieces in layers while keeping the form of each tile-shaped magnet intact. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shingled magnet applied to an AC servomotor used in a semiconductor manufacturing apparatus or the like which requires high-accuracy positioning, and a manufacturing method thereof.

[0002]

2. Description of the Related Art The prior art will be described below with reference to FIG. The roof magnet 11 has an upper surface and a lower surface having an arc shape. However, conventionally, since the outer diameter of the upper side arc and the inner diameter of the lower side arc are different, as shown in FIG. The divided base material magnet 13 is formed by dividing the shape of the base material magnet 12 into cubes of a size necessary for cutting, and the divided base material magnet 13 is further cut into an arc shape to be manufactured.

[0003]

However, in such a conventional technique, since the roof magnet 11 has the outer diameter of the arc on the upper surface side and the inner diameter of the arc on the lower surface that are different from each other, they can be stacked without a gap. And therefore,
When manufacturing from the base material magnet 12, there is a problem that there are many wasted parts and the yield is poor. The present invention has been made to solve such a problem, and an object of the present invention is to provide a roof tile magnet having a good yield in manufacturing and a manufacturing method thereof.

[0004]

In order to solve the above-mentioned problems, the present invention provides a roof tile magnet having an upper surface and a lower surface in an arc shape, in which the radius of the arc of the upper surface and the radius of the arc of the lower surface are set. It has the same dimensions. Further, in the method for manufacturing a roof tile magnet whose upper and lower surfaces are arc-shaped,
The radius of the arc of the upper surface and the radius of the arc of the lower surface have the same size, and the block-shaped base material magnet is manufactured by dividing it into layers in the shape of a tile magnet.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a roof tile magnet in an embodiment of the present invention. FIG. 2 shows a method for manufacturing a roof magnet in the embodiment of the present invention.
(A) is a perspective view showing a block-shaped base material magnet,
(B) is a perspective view showing that the block-shaped base material magnet is divided into layers in the shape of a tile-shaped magnet, and (c) is a perspective view showing the manufactured tile-shaped magnet. As shown in FIG. 1, the roof tile magnet 1 of the present invention is configured such that the radius Ra of the arc of the upper surface 1a and the radius Rb of the arc of the lower surface 1b are the same. Therefore, they can be stacked without any gap in stacking. The roof-shaped magnet 1 having such a structure is manufactured as shown in FIG. First, as shown in FIG. 2A, a block-shaped base material magnet 2 having the same width dimension as the tile magnet is prepared. The height of the base material magnet 2 is the roof magnet 1
Is the dimension when a predetermined number of layers are stacked. Next, FIG. 2 (b)
As shown in FIG. 3, the base material magnet 2 is divided into arc-shaped parts according to the radius dimension (Ra, Rb) of the arc of the tile-shaped magnet 1 for each thickness dimension of the tile-shaped magnet 1. As a result, as shown in FIG. 2C, a predetermined number of roof tile magnets 1 having the same radius as the upper surface arc and the lower surface arc are manufactured. The roof tile magnet 1 manufactured in this way is
Radius Ra of arc on upper surface 1a and radius Rb of arc on lower surface 1b
Since they have the same size, they can be stacked without any gap during storage after manufacturing, which is also advantageous in that the storage space can be smaller than in the conventional case.

[0006]

As described above, the present invention has the following effects. (1) The yield at the time of manufacturing the tile-shaped magnet can be improved, the number of times of cutting can be reduced, and the production cost can be significantly reduced.
(2) Since the tile-shaped magnets can be stacked without a gap, the space can be saved.

[Brief description of drawings]

FIG. 1 is a front view showing a roof tile magnet in an embodiment of the present invention.

2A and 2B show a method for manufacturing a tile-shaped magnet according to an embodiment of the present invention, FIG. 2A is a perspective view showing a block-shaped base material magnet, and FIG. 2B is a block-shaped base material magnet. FIG. 3 is a perspective view showing that the roof tile is divided into layers in the above shape, and FIG.

3A and 3B are views showing a method for manufacturing a roof tile-shaped magnet in the prior art, wherein FIG. 3A is a perspective view showing a block-shaped base material magnet, and FIG. 3B is a block-shaped base material magnet layered in a cubic shape. A perspective view showing splitting,
(C) is a perspective view showing a divided base material magnet obtained by dividing a block-shaped base material magnet into layers in a cubic shape,
(D) is a perspective view showing the roof tile magnet manufactured.

[Explanation of symbols]

1 Roof-shaped magnet 1a Upper surface 1b
Bottom surface 2 Block-shaped base material magnets Ra and Rb Radius dimensions of the arcs of the top and bottom surfaces of the tile-shaped magnet

Claims (2)

[Claims] 1. A roof tile magnet having an upper surface and a lower surface having an arc shape, wherein the radius of the arc of the upper surface and the radius of the arc of the lower surface have the same size. 2. A method for manufacturing a tile-shaped magnet having an upper surface and a lower surface in an arc shape, wherein the radius of the arc of the upper surface and the radius of the arc of the lower surface are the same, and the block-shaped base material magnet is a tile-shaped magnet. A method for manufacturing a roof tile-shaped magnet, characterized in that the roof tile-shaped magnet is manufactured by dividing the shape into layers.