JPH0513449Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a full-form milling cutter, and more particularly to a full-form milling cutter that reduces the cutting resistance applied to the cutting edge.

[Prior Art] Fig. 1 is a side view of a general milling cutter 1 viewed in the direction of the rotation axis, and Fig. 2 shows a saw blade material with a large pitch of tooth grooves formed by stacking strips 3 using the above-mentioned general milling cutter 1. 5 illustrates a row of blades 9 parallel to the rotation axis 7 direction of a conventional milling cutter.

The conventional general shape milling cutter 1 has a first shape shown in FIG.
A plurality of cutting blades in the axial direction provided in the blade row cut the left end and the second from the right of the tooth groove 5 shown in Fig. 2, and a plurality of cutting blades provided in the second blade row cut the second from the left. The tooth groove 5 at the th and right end is cut.

[Problems to be solved by the invention] In other words, in the conventional general-form milling cutter 1,
Since the entire width of the tooth groove 5 is cut at once, there are problems in that large particles are generated and the cutting resistance of the cutting blade is large.

[Means for solving the problem] In view of the conventional problems as described above, the present invention has the following features:
A second cutting blade is positioned between a first blade row formed by forming first cutting blades at predetermined intervals in the axial direction and a rotation locus drawn by each of the first cutting blades in the first blade row. The second blade row is formed by arranging second cutting blades at predetermined intervals in the axial direction, and the first blade row The cutting edge width of the first auxiliary cutting blade disposed between each of the first cutting blades is set smaller than the cutting edge width of the second cutting blade,
The cutting edge width of the second auxiliary cutting blade arranged between the second cutting blades in the second blade row is smaller than the cutting edge width of the first cutting blade.

[Operation] With the above configuration, a portion of the portion cut by each of the first cutting blades in the first blade row is cut by the second auxiliary blade, and a portion of the portion cut by each of the first cutting blades in the second blade row is cut by the second auxiliary blade. Since part of the part cut by the blade is cut by the first auxiliary blade, the part cut by each of the first and second cutting blades is reduced, and the cutting resistance of each of the cutting blades is reduced. Chips can be divided into smaller pieces.

[Example] Fig. 3 shows an example of the present invention in which a tooth groove 5 is cut into a workpiece in which a large number of strips 3 of saw blade material are piled up using a general milling cutter 1 consisting of a first blade row and a second blade row. The configuration of the general shape milling cutter for cutting is shown.

Therefore, in this embodiment, the plurality of first cutting blades 11 of the first blade row and the plurality of second cutting blades 15 of the second blade row are of the same size and shape, and the rotation locus drawn by the first cutting blades 11 has the same size and shape. The second cutting blade 15 is located at , and the first cutting blade 11 is located between the rotation locus drawn by the second cutting blade 15 .

In order to reduce the cutting resistance of the first and second cutting edges 11 and 15, a first cutting edge is provided between each first cutting edge 11.
An auxiliary cutting edge 13 is arranged, and a second auxiliary cutting edge 17 is arranged between each second cutting edge 15.

The first auxiliary cutting edge 13, 13 and the second auxiliary cutting edge 1
7 and 17 are the same size and shape, respectively, and the first and second
The cutting edge width is smaller than the cutting edge width of each of the cutting edges 11 and 15.

Note that the first and second cutting edges 11 and 15 are both provided with a cutting edge width slightly larger than the tooth space dimension, and the cutting edge portion 19 of the product saw blade is formed by cutting edges 11 and 15 of each blade row.
15 to produce a sharp cutting edge, resulting in a truncated portion 21 at the front end of the strip 3 at the lower end in FIG.

In addition, the cut portion 21 and the first and second cutting blades 1
The broken line between the cutting parts by 1 and 15 (see the bottom part of Fig. 3) indicates the part cut by the first auxiliary cutting blade 13 and the second auxiliary cutting blade 17 in the respective tooth grooves. be.

That is, since a portion of the cutting portion of the first and second cutting blades 11 and 15 is cut by the first and second auxiliary cutting blades 13 and 17, the cutting resistance is reduced, respectively.
Moreover, the chips are generated in a divided manner, which improves the discharge performance.

FIG. 4 shows a second embodiment of the present invention.
The difference from the first embodiment is that notches 23 are provided at appropriate positions on the cutting edges of the first and second cutting edges 11 and 15 provided in each blade row to further divide the chips into smaller pieces. It was designed to do so.

[Effects of the invention] As can be understood from the explanation of the embodiments above, according to the present invention, auxiliary cutting blades are provided between each cutting blade in each blade row, so that the cutting of each cutting blade is As the resistance decreases, the chips generated become more fragmented.

Therefore, high-speed cutting became possible and the tool life was extended.

[Brief explanation of the drawing]

Fig. 1 is a side view of a general-form milling cutter in the direction of its rotational axis, Fig. 2 is a plan view of a conventional general-form milling cutter for cutting a saw blade material, and Fig. 3 is an explanation of the blade array configuration as an embodiment of the present invention. FIG. 4 is an explanatory view of the configuration of the blade array according to the second embodiment of the present invention. 11...first cutting edge, 15...second cutting edge, 13...
...First auxiliary cutting blade, 17... Second auxiliary cutting blade.

Claims (1)

[Claims for Utility Model Registration] (1) A first blade row in which first cutting blades 11 are formed at predetermined intervals in the axial direction, and each of the first cutting blades 11 in the first blade row A second blade row in which second cutting blades 15 are arranged at predetermined intervals in the axial direction so that the second cutting blades 15 are positioned between the rotational loci drawn is alternately arranged in the circumferential direction on the outer circumference. The cutting edge width of the first auxiliary cutting blade 13 arranged between the first cutting blades 11 in the first blade row is the cutting edge of the second cutting blade 15. The cutting edge width of the second auxiliary cutting edge 17 arranged between the second cutting edges 15 in the second blade row is set smaller than the cutting edge width of the first cutting edge 11. A full-form milling cutter that is characterized by: (2) A general milling cutter according to claim 1 of the utility model registration claim, characterized in that notches are formed at appropriate positions of the first and second cutting edges 11 and 15, respectively. .