JP3814052B2 - Throw-away rotary tool seat mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure for attaching a sheet to a main body of a throw-away rotary tool used for face milling or end mill cutting.
[0002]
[Prior art]
When the throw-away tip is attached to the main body of the tool with a screw, a sheet is interposed between the main body and the tip to improve the tip mounting accuracy and prevent the main body from being damaged. Conventionally, there are the following (1) to (3) as the mounting structure of this sheet.
[0003]
(1) The sheet is simply a thin rectangular parallelepiped shape, and has a screw hole in the center. The sheet is penetrated by a chip fixing screw together with the chip and fixed to the main body.
[0004]
(2) A convex portion is formed on the same sheet as the above (1), and a concave portion into which the convex portion is fitted is formed in the chip mounting portion of the main body. When attaching the sheet, the convex part is fitted into the concave part, and both the chip and the sheet are passed through the chip fixing screw and fixed to the main body.
[0005]
(3) The seat itself is the same as the construction of (1) above, but the structure of the screw used for attachment is different. A sheet screw that penetrates the sheet and is fixed to the main body is cylindrical, and an internal thread is formed on the inner periphery thereof in the axial direction from one end. A chip screw passing through the chip is screwed into the female screw to fix the chip.
[0006]
[Problems to be solved by the invention]
However, the above mounting structure has the following problems.
(1) In any of the above mounting structures, the sheet may fall off when replacing the chip. Since the chip fixing screw is loosened at the time of chip replacement, the sheet may fall off and fall into a gap between members of the milling machine, which makes the chip replacement work complicated.
[0007]
(2) In the mounting structure described in (3) above, since the female screw is formed on the sheet screw, the outer diameter of the screw increases, and as a result, the sheet itself and the chip also increase in size.
[0008]
Accordingly, a main object of the present invention is to provide an attachment structure in which a sheet does not fall off even if a screw for fixing a chip to a main body is removed.
[0009]
[Means for Solving the Problems]
The present invention achieves the above object by providing a convex portion that fits to the main body of the sheet and tightening the convex portion with a screw. That is, the mounting structure of the present invention is a seat mounting structure for fixing a sheet interposed between a main body and a tip of a throw-away rotary tool to the main body, wherein the sheet has a convex portion, and the main body has the convex portion. And a convex portion fitted into the concave portion is fastened and fixed with a screw screwed into the main body.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
FIG. 1 is a perspective view showing an example in which the mounting structure of the present invention is applied to a face mill. This milling machine has a plurality of chip mounting portions 2 on a main body 1, and a chip 3 is fixed to each of the mounting portions 2. The chip 3 is mounted with a sheet 4 interposed between the chip 3 and the main body 1 in order to increase the mounting accuracy to the main body 1. The chip 3 and the sheet 4 have through-holes 5 and 6, respectively, and a chip fixing screw 7 is fitted therein and fixed to the main body 1 by fastening.
[0011]
Here, a T-shaped convex portion 8 was formed below the sheet 1, and a concave portion 9 corresponding to the convex portion 8 was formed on the lower surface of the chip mounting portion 2 of the main body. FIG. 2 shows an enlarged view around the chip mounting portion. As illustrated, the convex portion 8 of the sheet is fitted into the concave portion 9 of the main body. Although the sheet 4 cannot be removed upward by this fitting, if the chip fixing screw 7 is removed at the time of chip replacement and the sheet 4 is shifted along the recess 9, the sheet 4 falls from the chip mounting portion 2.
[0012]
Therefore, a screw hole 10 is formed in the lower surface of the chip mounting portion 2 of the main body, the sheet fixing screw 11 is screwed, the sheet 4 is tightened upward with the screw 11, and the convex portion 8 is pressed against the concave portion 9. 4 was configured not to fall off. Thereby, even if the screw 7 for fixing the chip 3 to the main body 1 is removed, the sheet 4 does not fall off.
[0013]
The shape of the convex portion 8 is T-shaped in the above description, but is not limited to this shape. A shape having a hook that cannot be pulled out in a specific direction (in the previous example, the axial direction of the sheet fixing screw) when fitted to the recess is preferable. For example, Ru is like those of a trapezoidal shape which is fitted to the dovetail groove. Shape ie, projections, by tightening of the screw, may be a shape having a surface to be pressed into the recess.
[0014]
In the above example, the convex portion is formed below the sheet, but it may be formed on the side in contact with the main body. For example, when the sheet is set on the main body, a convex portion may be formed on the inner peripheral side of the main body, and the convex portion may be tightened with a sheet fixing screw from the inner periphery of the main body.
[0015]
【The invention's effect】
As described above, according to the mounting structure of the present invention, it is possible to prevent the sheet from falling off even if the screw for fixing the chip to the main body is removed during chip replacement. Further, the screws that penetrate the sheet together with the chip and the sheet itself do not increase in size.
[Brief description of the drawings]
FIG. 1 is a perspective view of a face mill showing a mounting structure of the present invention.
FIG. 2 is an enlarged view showing a seat attachment state at the chip attachment portion of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Chip mounting part 3 Chip 4 Sheets 5, 6 Through hole 7 Chip fixing screw 8 Convex part 9 Concave part
10 Screw hole
11 Seat fixing screw

Claims (4)

In the mounting structure that fixes the sheet interposed between the main body of the throwaway rotary tool and the tip to the main body,
The sheet will have a convex portion fitted into the recess of the body,
The convex part is a shape that, when fitted into the concave part, is caught in the concave part so that the sheet does not pull out in the direction opposite to the direction in which the convex part is formed,
A seat mounting structure for a throw-away rotary tool, wherein a convex portion fitted into the concave portion is fastened and fixed with a sheet fixing screw screwed into a main body. The seat mounting structure for a throw-away rotary tool according to claim 1, wherein the shape of the convex portion is T-shaped. The sheet has a through hole of a chip fixing screw for fastening the chip to the main body,
The seat mounting structure for a throw-away rotary tool according to claim 1, wherein the convex portion of the sheet is provided on a surface different from a surface provided with the through hole in the outer surface of the sheet. The axial direction of the said sheet fixing screw and the axial direction of the chip | tip fixing screw which clamp | tightens a chip | tip to a main body via a sheet | seat orthogonally cross, The sheet | seat of the throw away rotary tool in any one of Claims 1-3 characterized by the above-mentioned. Mounting structure.

Images