JPS6212504Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a tip for a cutting tool that is configured to perform rough cutting and finishing cutting at the same time.

When machining parts where mass production is important, a chip formed into a certain shape and a chip stand to which this chip is mechanically attached are both formed with high precision, both are fixed, and the chip is re-ground at the same time. Many tools are used that can be discarded once they reach the end of their tool life. Therefore, the chips used are also formed to perform a single cutting process, and chips with complicated shapes are not used. This idea eliminates the waste of discarding the tip body made of the same material due to slight wear, and creates a cutting tool that can perform rough cutting and finishing cutting at the same time with a small amount of machining. The purpose is to provide chips.

This invention will be explained in detail based on illustrated embodiments.

FIG. 1 is a plan view of a chip showing one conventional example. The chip 1 is a small piece integrally formed of the same cutting material, and is formed into a plate-like body in which the four corners of a square shape are connected by arcs of small diameter. The connecting edge between the arcuate portions at the four corners and one surface forms a cutting tool, which performs a single cutting process. Therefore, one chip 1 has a maximum of eight blades, four on one side and four on the four corners of the other side. When these eight blades wear out a certain amount and reach the end of their tool life, they are discarded. When the tool reaches the end of its life, it means that the tool can no longer cut, so the amount of constant wear is always small and most of the main body is thrown away.

Therefore, in this invention, as shown in FIG. 2, arc-shaped notches 3, 4, 5, and 6 are provided and formed with a convex portion facing the center so as to cut out the worn blade. Cutting tools 7, 8, 9, in which the notches 3, 4, 5, 6 and the connecting edge on the side surface are connected by a small diameter arc.
Chip 2 with 10, 11, 12, 13, 14
to form. In other words, two cutters 7 and 8 are formed in one notch 3.

Further, the notches 3, 4, 5, and 6 are formed parallel to the axis of the chip 2 over the entire side surface as shown in FIG. In other words, blades 7 and 8 of the same shape as the cutters 7 and 8 formed on one side of one notch 3 are also formed on the other side.

Furthermore, each notch 3, 4, 5, 6 is formed on both sides, and two cutters 7, 8, 9, 10, 11, 1
2, 13, and 14 are formed so as to be located on a circumference centered on the axis of the chip 2. In other words, even if the notch radii of the notch 3 and the notch 4 are different, the blades 7 and 8 on both sides of the notch 3 are formed on the same circumference, and the notch 4 is Knives on both sides 9,1
0 are formed on the same circumference with different diameters. Of course, if the notch radius is the same, the eight blades 7, 8, 9, 10, 11, 12, 13, 14 are provided on the same circumference with the same diameter.

Furthermore, when the two blades 7 and 8 formed in one notch 3 reach the end of their tool life, a new blade is installed to remove the worn blades 7 and 8, as shown in Fig. 4. An arc-shaped notch 15 is formed, and a new 2
It is possible to provide two blades 16, 17.

Therefore, in the chip 2 according to this invention, one of the two blades 7 and 8 formed in one notch 3 is used for rough cutting, and the other blade 8 is used for finishing cutting. used for.

That is, as shown in FIG. 5, the cutter 7 located first and the cutter 8 located later in the feeding direction (arrow) of the chip 2 are used with a slight positional difference a relative to the workpiece 18. 8 is used to cut a thin wall corresponding to the positional difference with the cutter 7 that performs heavy cutting. This means that when the workpiece 18 rotates to the right in the direction of the arrow in FIG. The same applies not only to the case where the tip 2 moves in the direction of the tool, but also to the case of plane cutting by a face fly, in which the tip 2 is sent in the radial direction while rotating around the tool axis.

Further, in the illustrated embodiment, the chip 2 has a square shape, but it can be similarly formed in other shapes, such as a triangular shape or a parallelogram shape.

Since this invention is constructed as claimed in the utility model registration based on the above-mentioned embodiment, it is possible to have the blades on both sides of the notch perform different processes, such as rough cutting and finishing cutting, at the same time. Become. In addition, the notch part can be easily manufactured using a so-called throw-away type chip before use, so the manufacturing cost is low, and the cutting tool can be re-formed within an appropriate range, so providing a chip for a cutting tool that is highly usable. becomes possible.

Since the blade is formed on both sides of the notch formed at the corner of the square body, the blade is completed as soon as the notch is completed, making it extremely easy to form the blade. By changing the notch radius, it is possible to form blades with different spacing, and by installing the chips at different angles around the axis, it is possible to create blades with different cutting depths with the blades formed at one corner. It is possible to perform processing. Furthermore, by forming notches with different notch radii at a plurality of corners, it is possible to perform machining with different depths of cut with a single cutting tool tip.

[Brief explanation of drawings]

FIG. 1 is a plan view of a chip showing a conventional example, FIG. 2 is an explanatory plan view of a chip according to this invention, and FIG.
FIG. 4 is an explanatory side view of the chip, FIG. 4 is an explanatory plan view of the chip illustrating the formation of a notch, and FIG. 5 is an explanatory diagram showing the state in which the chip is used. Explanation of symbols, 2...chip, 3, 4, 5, 6,
15...Notch, 7, 8, 9, 10, 11, 1
2, 13, 14, 16, 17... cutlery.

Claims (1)

[Scope of utility model registration request] A width plate-shaped horn body made of the same cutter material,
An arcuate shape in which the corner of the angular body is centered on the bisector of the included angle of the corner, has a convex portion facing inward, and has a notch surface parallel to the axis of the angular body. a notch,
A tip for a cutting tool, characterized in that it has blades provided on both sides of the notch and formed on a circumference centered on the axis of the angular body.