JP2526825Y2 - Router cutlery for woodworking - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a woodworking router for use in drilling and grooving of materials in the woodworking industry and the like.

[0002]

2. Description of the Related Art Conventionally, a router bit 20 used in the woodworking industry or the like for drilling or grooving a wooden material has an attached sectional shape as shown in FIG.
A cutting blade 25 is mounted on a mounting portion 24 formed at a right angle by a mounting surface 22 and a receiving surface 23 formed on the cutting edge 21 with its cutting edge directed outward, and this is firmly mounted on the base metal 21 by brazing or the like. Generally, a plurality of the cutting blades 25 are provided opposingly, for example, about two.

[0003] During the processing of a material, that is, when the cutting blade 25 is rotated in the direction of the arrow in FIG.
It is usual that the base metal 21 at the back of the receiving surface is formed so as to have a sufficient amount to reinforce the cutting resistance.

Therefore, as shown in FIG. 5, the mounting of both cutting blades 25 is set such that the so-called rake angle .alpha.
Due to this, the cutting resistance is large, and accordingly, it is necessary to take a large amount of the base metal 21.Therefore, in order to reinforce the cutting blade 25, it is necessary to move to the center side further by that amount and mount it. Thus, there is a disadvantage that a vicious circle occurs in which the cutting force increases.

[0005] Further, the sharpness of the cutting blade 25 is reduced due to an increase in the cutting resistance, and the surface of the cut surface of the material to be processed is roughened, and the blade holding of the cutting blade 25 is significantly reduced, which is extremely uneconomical. . And other various problems.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a cutting blade inserted into a fitting groove formed in a base metal, a cutting edge of one end thereof being directed outward, and a back portion thereof. The fitting portion at the other end is fitted and fixed so as to be in contact with the receiving surface, so that the rake angle of the cutting blade can be made as large as possible, and the cutting resistance is greatly reduced. Accordingly, it is an object of the present invention to provide a woodworking router blade capable of improving the sharpness of a material and improving the economic life of a cutting blade.

[0007]

According to the present invention, there is provided a shank portion having a cylindrical shape, having a mounting groove facing outward, and extending at one end of the shank portion. A rod-shaped base metal to be formed and an outer peripheral surface portion of the rod-shaped base metal have an outer peripheral surface portion having substantially the same outer diameter as the shank portion and a blade mounting surface, and a cross-sectional area is formed smaller than a cross-sectional area of the shank portion. And facing outward, and a fitting groove provided in the longitudinal direction of the base metal in communication with the mounting groove and formed in the blade mounting surface, and facing the cutting edge outward, and A longitudinal cutting blade inserted in the fitting groove and the mounting groove so that the back portion is located closer to the outer peripheral surface portion of the base metal than the rake face, and the cutting blade is provided with the fitting groove and the Fixing means for fixing to the mounting groove, wherein the cutting is inserted into the mounting groove. The woodworking Le is embedded in the shank portion - in the configuration of a motor tool.

In the construction of the woodworking cutter, the cutting edge of the cutting blade is formed in a continuous waveform.

Further, the rake face of the cutting blade is formed in an arc shape.

[0010]

The woodworking router blade of the present invention configured as described above has the following effects. When a material is supplied to the woodworking router blade in a state where the woodworking router blade is fixed to the drive shaft of the woodworking machine and rotated at a predetermined speed, the material is processed as desired by the cutting blade.

At this time, the cutting blade is configured such that the mounting portion at the other end is inserted into the fitting groove in the base metal, and the blade base is inserted into the mounting groove in the base metal to be embedded therein. Since the back portion is abutted, even if a large cutting resistance is first applied during cutting, the cutting groove is securely supported by the fitting groove and the receiving surface, so that the cutting blade is not missing.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. 1 to 3, A is a woodworking router blade used in a woodworking milling machine or the like, and has a bar-shaped base 4 having a shank portion 1, a tool mounting surface 2 and a receiving surface 3, and a bar-shaped base 4. , A cutting blade 6 fitted in the fitting groove 5, and an embedded portion d provided in the cutting blade 6.

The shank portion 1 is formed in a cylindrical shape from a metal steel material, and is attached to a chuck (not shown) of a rotary shaft of the woodworking milling machine or the like. Has.

The bar-shaped base metal 4 extends to one end of the shank 1 and one or both sides (both sides in FIGS. 1 to 3) of the shank 1 are larger than the outer diameter of the shank 1. A blade mounting surface 2 which is cut so as to have a short dimension and is formed so that both surfaces thereof are substantially parallel to each other and extends to a predetermined length in a longitudinal direction (axial direction) is provided.

That is, the outer peripheral surface of the rod-shaped base metal 4 has an outer peripheral surface having substantially the same outer diameter as the shank portion 1 and the blade mounting surface 2.
And the cross-sectional area is formed smaller than the cross-sectional area of the shank portion 1.

Further, the vicinity of the peripheral surface of the base metal 4, that is,
On both sides of the blade mounting surface 2 in the width direction, receiving surfaces 3 substantially perpendicular to the blade mounting surface 2 are formed.

The above-mentioned fitting groove 5 faces outward at the intersection between the blade mounting surface 2 and the receiving surface 3 of the base metal 4, and
It is provided in the longitudinal direction of the base metal 4 so as to communicate with the mounting groove 5 a and is formed in the blade mounting surface 2.

The cutting blade 6 has a longitudinal shape made of a super wear-resistant alloy, a sintered diamond, a high speed steel, a cemented carbide tip or the like, and has a cutting edge 6a at one end and a mounting portion 6b at the other end.
The blade 6a is inserted into the fitting groove 5 and the mounting groove 5a so that the cutting edge 6a faces outward and the back portion is located closer to the outer peripheral surface portion of the base metal 4 than the rake face 8; Is fixed by the fixing means 7.

The cutting blade 6 inserted into the mounting groove 5a is embedded in the shank 1.

The cutting blade 6 is formed in a continuous waveform over the entire length of the cutting edge 6a, so that a reduction in cutting resistance can be improved and, as shown in FIGS. 1 and 2, The cutting edge 6a at the cutting edge of the cutting blade 6
A buried portion d of a bladeless portion not formed with a groove is provided, and the fitting groove 5 is extended in the axial direction to insert the buried portion d into a mounting groove 5a provided in the shank portion 1. The cutting blade 6
In this case, the portion where cutting resistance is most likely to be applied and which is easily broken is reinforced.

Further, on the inner end side of the base metal 4, that is, in the vicinity of the shank portion 1, as shown in FIGS. 1 and 2, the cutting tool mounting surface 2 is connected to the outer periphery of the shank portion 1. Forming an arc-shaped reinforcing part 2a toward the part,
The end is matched with the shank portion 1. At the time of cutting, the cutting resistance applied to the cutting blade 6 may greatly act on the inner end of the cutting blade 6. By supporting the cutting blade 2a, the supporting force of the cutting blade 6 is improved.

When the cutting blade 6 is mounted, the mounting portion 6b is inserted into the fitting groove 5 as described above. Therefore, as shown in FIG. 3, it can be attached to the outer periphery as much as possible in the width direction of the base metal 4. Therefore, the rake angle β between the pair of cutting blades 6 and 6 can be increased.

Further, as shown in FIG. 4, an arc-shaped rake face 8 whose arc surface coincides with the blade mounting surface 2 is formed on the front side surface of the cutting blade 6 described above. ,
The discharge of cutting chips is improved, and the cutting resistance to the material is reduced.

[0024]

[Effects of the Invention] As described above, the woodworking router blade according to the present invention inserts and fixes the cutting blade in the fitting groove of the base metal, that is, a so-called embedded type, in which the cutting blade is mounted. Since the rake angle is set large, the cutting resistance during cutting is small, which improves the sharpness of the cutting blade, and provides a smooth and smooth surface of the material to be machined, and the cutting edge has a wavy shape. In combination with the formation of the cutting blade, the cutting edge of the cutting blade is greatly improved, which is extremely economical.

Further, since the tool mounting surface is formed in an arc shape toward the outer peripheral portion of the shank portion at the inner end of the base metal, the support force of the cutting blade by the base metal is improved,
It is possible to sufficiently oppose the cutting resistance of the cutting blade received during cutting, and the number of accidents such as breakage of the cutting blade is reduced. And so on.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a woodworking router blade according to the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a bottom view in FIG. 2;

FIG. 4 is a bottom view showing another embodiment in FIG. 1;

FIG. 5 is a sectional view showing a conventional router blade.

[Explanation of symbols]

 Reference Signs List 1 shank part 2 blade mounting surface 4 base metal 5 fitting groove 5a mounting groove 6 cutting blade 7 fixing means 8 rake face

Claims (3)

(57) [Scope of request for utility model registration] 1. A shank portion formed in a cylindrical shape and having a mounting groove facing outward, a bar-shaped base metal extending to one end of the shank portion, and an outer peripheral surface portion of the bar-shaped base metal, The shank has an outer peripheral surface having substantially the same outer diameter as that of the shank and a blade mounting surface, and has a cross-sectional area smaller than the cross-sectional area of the shank, facing outward and communicating with the mounting groove. A fitting groove formed in the longitudinal direction of the base metal and drilled in the blade mounting surface, with the cutting edge facing outward, and a back portion closer to an outer peripheral surface portion of the base metal than the rake face. And a fixing means for fixing the cutting blade to the fitting groove and the mounting groove, wherein the cutting blade is fixed to the fitting groove and the mounting groove. Wherein the cutting blade is embedded in the shank portion. Data cutlery. 2. The cutting tool for woodworking according to claim 1, wherein the cutting edge of the cutting blade is formed in a continuous waveform. 3. The lumber cutter for woodworking according to claim 1, wherein the rake face of the cutting blade is formed in an arc shape.