JPH0578421U - Solid end mill - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a solid end mill capable of suppressing vibration during cutting without impairing high-speed cutting property. [Structure] Outer peripheral blades 12, 14, 16 and 18 are formed on the intersecting ridge line portion of the groove wall surface and the outer peripheral surface of the tool body, and further, the intersecting ridge line portion is locally formed on these intersecting ridge line portions. Nicks 12a, 12b, ...
14b ..., 16a, 16b ..., 18a, 18b ... Are formed along the axis of the tool body. The pitch interval P of the nicks formed on the crossing ridge portion where the outer peripheral blade 12 is formed
1, P2, P3, P4 ... Are gradually enlarged toward the rear end side of the tool body, and the other outer peripheral blades 14, 16, 18
The pitch intervals are also the same.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a solid end mill having an outer peripheral edge and a bottom edge formed on the outer periphery and the tip of a tool body, respectively.

[0002]

[Prior Art]

 Conventionally, solid end mills have been widely used as cutting tools for grooving and shoulder milling work materials. FIG. 4 shows an example of such a solid end mill, which is mainly composed of a tool body 2 which is made of a hard material such as cemented carbide or high speed steel in a shaft shape. A plurality of groove portions 4 spirally extending along the axis A of the tool body 2 are formed on the outer peripheral portion of the tip portion 2a of the tool body 2, and the wall surface 4a of these groove portions 4 and the outer peripheral surface 2b of the tool body 2 are formed. A plurality of outer peripheral blades 6 are formed on the ridge line intersecting with the tool body 2, and a plurality of outer peripheral blades 6 linearly extending in the radial direction of the tool body 2 are formed on the ridge line intersecting the wall surface 4a of the groove 4 and the tip surface 2c of the tool body 2. Bottom blades 8 are formed.

Further, in the solid end mill shown in FIG. 4, a plurality of nicks 10 are formed on each of the plurality of spiral outer peripheral blades 6 along the axis A of the tool body 2. These nicks 10 are formed by locally recessing the intersecting ridge portion between the wall surface 4a of the groove portion 4 and the outer peripheral surface 2b of the tool main body 2. These nicks 10 allow the outer peripheral blade 6 to cut the workpiece. The chips are finely divided to reduce the cutting resistance, and the high-speed cutting performance required especially in rough cutting is improved.

[0004]

[Problems to be solved by the device]

 By the way, in the conventional solid end mill as described above, the plurality of nicks 10 formed on the plurality of outer peripheral blades 6 are all of the same size and shape, and the pitch connecting the centers of these nicks 10 is the same. The intervals are all the same. For this reason, in such a solid end mill, there is a drawback in that during the cutting of the work material, the tool body 2 vibrates at a constant rhythm and chatter easily occurs. An object of the present invention is to provide a solid end mill capable of solving the above problems and suppressing vibration during cutting without impairing high-speed cutting performance.

[0005]

[Means for Solving the Problems]

 The present invention mainly solves the problems in the conventional solid end mill as described above by making the formation modes of a plurality of nicks uneven and irregular, and has the following respective configurations.

(1) A plurality of groove portions extending along the axis of the tool body are formed on the outer peripheral portion of the tool body, and a plurality of outer peripheral blades are provided on the ridge line portion where the wall surfaces of these groove portions and the outer peripheral surface of the tool body intersect. And a plurality of bottom blades linearly extending in the radial direction of the tool body are formed at the ridges of intersections between the wall surfaces of the plurality of grooves and the tip end surface of the tool body. A plurality of nicks formed by locally recessing the intersecting ridge line portion are formed along each of the plurality of intersecting ridge line portions where the outer peripheral blade is formed along the axis of the tool body. In at least one of the above, the solid end mill is characterized in that the pitch interval connecting adjacent centers of the plurality of nicks formed on the outer peripheral blade is changed along the axial direction of the tool body.

(2) A plurality of groove portions extending along the axis of the tool body are formed in the outer peripheral portion of the tool body, and a plurality of outer peripheral blades are provided at the ridge line portion where the wall surface of these groove portions and the outer peripheral surface of the tool body intersect. And a plurality of bottom blades linearly extending in the radial direction of the tool body are formed at the ridges of intersections between the wall surfaces of the plurality of grooves and the tip end surface of the tool body. A plurality of nicks formed by locally recessing the intersecting ridge line portion are formed along each of the plurality of intersecting ridge line portions where the outer peripheral blade is formed along the axis of the tool body. In at least one of the above, the size of each of the plurality of nicks formed on the outer peripheral blade is changed along the axial direction of the tool body, a solid end mill.

(3) A plurality of groove portions extending along the axis of the tool body are formed on the outer peripheral portion of the tool body, and a plurality of outer peripheral blades are provided on the ridge line portion where the wall surfaces of these groove portions and the outer peripheral surface of the tool body intersect. And a plurality of bottom blades linearly extending in the radial direction of the tool body are formed at the ridges of intersections between the wall surfaces of the plurality of grooves and the tip end surface of the tool body. A plurality of nicks formed by locally recessing the intersecting ridge line portion are formed along each of the plurality of intersecting ridge line portions where the outer peripheral blade is formed along the axis of the tool body. The size of each of the plurality of nicks formed on the outer peripheral blade is changed along the axial direction of the tool body, and the pitch interval connecting the centers of the adjacent nicks is set to at least one of the tools. Solid end mill being characterized in that contain changed along the axial direction of the body.

(4) A plurality of groove portions extending along the axis of the tool body are formed in the outer peripheral portion of the tool body, and a plurality of outer peripheral blades are provided at the ridge line intersecting the wall surface of the groove portion and the outer peripheral surface of the tool body. And a plurality of bottom blades linearly extending in the radial direction of the tool body are formed at the ridges of intersections between the wall surfaces of the plurality of grooves and the tip end surface of the tool body. A plurality of nicks formed by locally recessing the intersecting ridge line portion are formed along each of the plurality of intersecting ridge line portions where the outer peripheral blade is formed along the axis of the tool body. At least one of the above is different from the other outer peripheral blades in the formation mode of the plurality of nicks, the solid end mill.

(5) In (4) above, the difference in the formation mode of the plurality of nicks is caused by the different pitch intervals connecting the centers of the adjacent nicks of the plurality of nicks. A solid end mill characterized by.

(6) In the solid end mill according to the above (4), the difference in the formation mode of the plurality of nicks is caused by changing the size of each of the plurality of nicks.

(7) In (4) above, the difference in the formation mode of the plurality of nicks changes the size of each of the plurality of nicks, and also makes the pitch interval connecting the centers of adjacent nicks different. Solid end mills characterized by being produced by

[0013]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The solid end mill according to each of the following examples is the same as the solid end mill shown in FIG. 4 described above except that a plurality of nicks are not formed, and the description thereof will be omitted.

FIG. 1 shows a four-blade solid end mill according to an embodiment of the present invention. FIG. 1 (a) is a front view and FIG. 1 (b) is a development view of an outer peripheral surface. Reference numerals 12, 14, 16 and 18 respectively denote outer peripheral blades formed on the ridge line portion where the wall surface of the groove portion and the outer peripheral surface of the tool body intersect with each other. A large number of nicks 12a, 12b, ..., 14a, 14b, ..., 16a, 16b, ..., 18a, 18b, ... that are substantially fan-shaped in a side view and are formed by locally recessing the intersecting ridges along the axis of the main body. Are formed.

The nicks 12a, 12b, 12c formed on the outer peripheral blade 12 have the same size and shape, but the pitch intervals P1 and P2 connecting the centers of two adjacent nicks are the same. , P3, P4, ... Gradually increase toward the rear end side of the tool body, and P1 <P2, P2 <P3, P3 <P4 ,. The rate of pitch increase may be constant, exponentially increasing, or random increasing.

The form of the nicks formed on the other outer peripheral blades 14, 16, 18 is also similar to that of the outer peripheral blade 12, and each nick 14a, 14b, ..., 16a, 16b ,. The shapes and sizes of 18a, 18b, ... Are the same as those of the nick 12a.

In the solid end mill having the above-described configuration, due to the large number of nicks formed on the outer peripheral blades 12, 14, 16, 18 as well as the solid end mill shown in FIG. When the work material is cut in the axial direction of the tool body without impairing the machinability, the size of the chips generated by the outer peripheral blades 12, 14, 16, 18 gradually changes, The vibration applied to the work material becomes irregular and chatter vibration is suppressed.

Next, another embodiment of the present invention will be described with reference to FIG. This figure is the same as FIG. 1, and in these figures, reference numerals 20, 22, 24, and 26 are outer peripheral blades, respectively.

The plurality of nicks 20a, 20b, 20c, 20d, ... Formed on the outer peripheral blade 20 of the solid end mill according to this embodiment have pitch intervals P, P, P ... Connecting the centers of two adjacent nicks. Are the same, but the sizes of the nicks 20a, 20b, 20c, 20d, ... Are so formed that they gradually increase toward the rear end side of the tool body. That is, regarding the size of the nick, there is a relationship of 20a <20b, 20b <20c, 20c <20d, ....

The other outer peripheral blades 22, 24 and 26 have exactly the same structure as the outer peripheral blade 20.

Also in such a solid end mill, similarly to the solid end mills according to the above-described embodiments, when the work material is cut in the axial direction of the tool body, the outer peripheral blades 20, 22, 24, 26 are used. The size of the generated chips gradually changes, and the vibration applied to the work material becomes irregular, and the occurrence of chatter vibration is suppressed.

Next, another embodiment of the present invention will be described with reference to FIG. This figure is similar to FIG. 2, and in these figures, reference numerals 28, 30, 32, and 34 are outer peripheral blades, respectively.

The nicks 28a, 28b, 28c, 28d, ... Formed on the outer peripheral blade 28 are all of the same size, and the pitch interval P6 of two adjacent nicks is constant.

The nicks 30a, 30b, 30c, 30d, ... Formed on the outer peripheral blade 30 all have the same size, and the pitch interval P7 between two adjacent nicks is constant. However, the pitch interval P7 is formed larger than the pitch interval P6 of the outer peripheral blade 28.

The outer peripheral blade 32 has the same structure as the outer peripheral blade 28, and the outer peripheral blade 34 has the same structure as the outer peripheral blade 30.

According to the solid end mill as described above, since the pitch between the nicks of the adjacent outer peripheral blades is different, the vibration applied to the work material becomes irregular, and the occurrence of chatter vibration is suppressed, Resonance is also less likely to occur.

The technical matters other than the above are listed below. (1) The effect of preventing chatter vibration by the solid end mill of the present invention is particularly remarkable for work materials such as aluminum alloy and cast iron.

(2) The present invention is not limited to those shown in the above embodiments, and various modifications, applications and combinations are possible. For example, in the structure shown in FIG. 2, the nick is not necessarily expanded gradually, and its size is randomly expanded or contracted, or the nick is combined with the structure of FIG. Alternatively, the size of the nick may be changed along the axis of the tool body.

Further, in the one shown in FIG. 3, the pitch intervals of the nicks are made different between the two adjacent outer peripheral blades, but it is also possible to make the size of the nicks different from each other. Not only the pitch interval but also the size of the nick may be different.

(3) In the embodiments shown in FIGS. 1 to 3 described above, the solid end mill has four blades, but the solid end mill according to the present invention may have two or more blades and four blades. Of course, it is not limited to the blade.

[0031]

[Effect of the device]

 As described above, according to the present invention, the high-speed cutting property required particularly in rough cutting is not impaired, and the plural nicks are formed unevenly and irregularly. The size of the chips is not constant, and the vibration applied to the work material becomes irregular, which effectively suppresses the occurrence of chatter vibration.

[Brief description of drawings]

1A and 1B are views showing a solid end mill according to an embodiment of the present invention, in which FIG. 1A is a front view and FIG. 1B is a development view of an outer peripheral surface.

2A and 2B are views showing a solid end mill according to another embodiment of the present invention, wherein FIG. 2A is a front view and FIG. 2B is a development view of an outer peripheral surface.

3A and 3B are views showing a solid end mill according to another embodiment of the present invention. FIG. 3A is a front view and FIG. 3B is a development view of an outer peripheral surface.

FIG. 4 is a side view showing a conventional solid end mill.

[Explanation of symbols]

12, 14, 16, 18, 20, 22, 24, 26, 2
8, 30 Outer peripheral blades 12a, 12b, ..., 14a, 14b, ..., 16a, 1
6b, ..., 18a, 18b, ..., 20a, 20b ,.
22a, 22b, ..., 24a, 24b, ..., 26a, 2
6b, ..., 28a, 28b, ..., 30a, 30b ,.
Nick P1, P2, P3, P4, P5, P6, P7, P Pitch interval

Claims (7)

[Scope of utility model registration request] 1. A plurality of groove portions extending along an axis of the tool body are formed on an outer peripheral portion of the tool body, and a plurality of outer peripheral blades are formed on a ridge line intersecting a wall surface of the groove portion and an outer peripheral surface of the tool body. In the solid end mill, wherein a plurality of bottom blades linearly extending in the radial direction of the tool body are formed at the ridge line portion where the wall surfaces of the plurality of groove portions and the tip end surface of the tool body intersect, the plurality of outer peripheral blades are provided. In each of the plurality of intersecting ridge line portions formed, along the axis of the tool body, a plurality of nicks formed by locally recessing the intersecting ridge line portions are formed, and at least one of the plurality of outer peripheral blades is formed. About one
A solid end mill, wherein a pitch interval connecting adjacent centers of the plurality of nicks formed on the outer peripheral blade is changed along an axial direction of the tool body. 2. A plurality of groove portions extending along an axis of the tool body are formed on an outer peripheral portion of the tool body, and a plurality of outer peripheral blades are formed on a ridge line portion intersecting a wall surface of the groove portion and an outer peripheral surface of the tool body. In the solid end mill, wherein a plurality of bottom blades linearly extending in the radial direction of the tool body are formed at the ridge line portion where the wall surfaces of the plurality of groove portions and the tip end surface of the tool body intersect, the plurality of outer peripheral blades are provided. In each of the plurality of intersecting ridge line portions formed, along the axis of the tool body, a plurality of nicks formed by locally recessing the intersecting ridge line portions are formed, and at least one of the plurality of outer peripheral blades is formed. About one
A solid end mill, wherein the size of each of the plurality of nicks formed on the outer peripheral blade is changed along the axial direction of the tool body. 3. A plurality of groove portions extending along an axis of the tool body are formed on an outer peripheral portion of the tool body, and a plurality of outer peripheral blades are formed on a ridge line intersecting a wall surface of the groove portion and an outer peripheral surface of the tool body. In the solid end mill, wherein a plurality of bottom blades linearly extending in the radial direction of the tool body are formed at the ridge line portion where the wall surfaces of the plurality of groove portions and the tip end surface of the tool body intersect, the plurality of outer peripheral blades are provided. In each of the plurality of intersecting ridge line portions formed, along the axis of the tool body, a plurality of nicks formed by locally recessing the intersecting ridge line portions are formed, and at least one of the plurality of outer peripheral blades is formed. About one
The size of each of the plurality of nicks formed on the outer peripheral blade is changed along the axial direction of the tool body, and the pitch interval connecting the centers of adjacent nicks is set along the axial direction of the tool body. A solid end mill characterized by being changed. 4. A plurality of groove portions extending along an axis of the tool body are formed on an outer peripheral portion of the tool body, and a plurality of outer peripheral blades are formed on a ridge line intersecting a wall surface of the groove body and an outer peripheral surface of the tool body. In the solid end mill, wherein a plurality of bottom blades linearly extending in the radial direction of the tool body are formed at the ridge line portion where the wall surfaces of the plurality of groove portions and the tip end surface of the tool body intersect, the plurality of outer peripheral blades are provided. In each of the plurality of intersecting ridge line portions formed, along the axis of the tool body, a plurality of nicks formed by locally recessing the intersecting ridge line portions are formed, and at least one of the plurality of outer peripheral blades is formed. A solid end mill characterized in that one of the plurality of nicks is different from that of the other outer peripheral blade in the formation mode of the plurality of nicks. 5. The difference in the manner of forming the plurality of nicks is
The solid end mill according to claim 4, wherein the solid end mill is produced by making the pitch intervals connecting the centers of adjacent nicks of the plurality of nicks different from each other. 6. The difference in the manner of forming the plurality of nicks is
5. The solid end mill according to claim 4, wherein the solid end mill is produced by changing the size of each of the plurality of nicks. 7. The difference in the formation mode of the plurality of nicks is
The solid end mill according to claim 4, wherein the solid end mill is produced by changing the size of each of the plurality of nicks and making the pitch intervals connecting the centers of adjacent nicks different from each other.