JPH11151616A - Shaving cutter and shaving method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To finish the surface roughness of a tooth surface to wet cutting, even if a workpiece is machined by dry cutting by coating a coat having specific composition on at least the tooth surface of a shaving cutter made of high-speed tool steel. SOLUTION: A shaving cutter 1 in use is a cutter where the coat, practically having composition of (Ti(1-x)Alx) (NyC(1-y) (NyC(1-y)) (provided that 0.2<=x<=1.9, 0.2<=y<=1.0), is coated on a tooth surface 4 by at least one layer. By this coating, Al in a coating coat is temperature-increased by cutting heat, consequently is oxidized by air to form an oxide film, having high-abrasion resistance, on the surface of the coating coat, thereby making the shaving cutter 1 unabrasive. The surface roughness of the tooth surface can be made a practical 3 μm Rmax degree, by finely cutting the tooth surface of a work piece by dry cutting, through the cutting blade 6 of the shaving cutter 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaving cutter and a shaving method for finishing a gear.

[0002]

2. Description of the Related Art In general, there are cases where a gear having a tooth profile is used as it is as a product, and cases where a tooth surface is subjected to shaving processing in order to further increase the accuracy of the tooth surface. In recent years, when processing gears, so-called dry cutting, which performs cutting without using a cutting oil, has been used due to environmental problems. For example, in the field of hobbing and the like, dry cutting in which the machining efficiency is increased by using a carbide hob has already been performed.

[0003]

However, when a carbide tool is applied to a shaving cutter, the cost is increased because the carbide is very expensive, and the total cost deteriorates even if the machining efficiency is increased. Would. Further, in the shaving process, when dry cutting is performed, the accuracy of the tooth surface of the gear becomes coarse, and there is a problem that the intended accuracy cannot be obtained.

[0004] Specifically, for example, the outer diameter is 200 mm, the number of teeth is 7
3.75 modules using a high-speed tool steel shaving cutter with an intersection angle of 15 degrees, pressure angle of 20 degrees, 37 teeth, helix angle of 20 degrees, tooth width of 13 mm, material SCr42
When plunge shaving is performed on a work 0 at a rotation speed of 200 rpm, the surface roughness of the tooth surface of the work can be set to 3 μmR _{max in} the case of normal wet cut using a cutting oil, whereas in the case of dry cut the surface roughness of the tooth surfaces of the workpiece becomes a 29MyumR _max, the surface accuracy of the tooth surfaces of the workpiece will be deteriorated significantly.

[0005] For this reason, in the gear processing line, the process of generating gears can be performed by dry cutting, but the shaving process must be performed by wet cutting. At present, it is difficult to achieve this, and dry cutting of the shaving process is strongly desired.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a shaving cutter capable of performing efficient shaving without using a shaving cutter capable of dry cutting and a shaving cutter made of carbide. And

[0007]

Shaving cutter of the present invention SUMMARY OF THE INVENTION To achieve the above object, essentially, provided that _{(Ti (1-x) Al} x) (N y C (1-y)), 0.2 At least one film having a composition of ≦ x ≦ 0.9 0.2 ≦ y ≦ 1.0 is coated on at least a tooth surface of a shaving cutter made of high-speed tool steel.

In order to achieve the above object, the shaving cutter of the present invention substantially comprises (Ti _(1-x) Al _x ) _(1-w) (N _y C _(1-y) ) _w , 0.2 ≤ x ≤ 0.9 0.2 ≤ y ≤ 1.0 0.45 ≤ w ≤ 0.55, characterized in that at least one film is coated on at least the tooth surface of a shaving cutter made of high-speed tool steel.

Further, the shaving cutter of the present invention for achieving the above object has a nitride forming element of M, and substantially comprises (Ti _z Al _x M _(1-zx) ) _(1-w) (N _y C _(1-y) ) _w However, at least one layer of a film having a composition of 0.2 ≦ x ≦ 0.9 0.2 ≦ y ≦ 1.0 0.1 ≦ z ≦ 0.8 0.7 ≦ (z + x) <1.0 0.45 ≦ w ≦ 0.55 is formed on a high-speed tool It is characterized in that at least the tooth surface of a steel shaving cutter is coated.

Further, a shaving method according to the present invention for achieving the above object is characterized in that shaving is performed by the above-mentioned shaving cutter by dry cutting in which cutting is performed without using a cutting oil. Then, air is blown to the cutting portion.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A shaving cutter according to the present invention will be described with reference to FIGS. FIG. 1 is a front view of a shaving cutter according to an embodiment of the present invention, and FIG.
The enlarged perspective state of the arrow II part in the middle is shown.

As shown in FIG. 1, a shaving cutter 1
The toothed portion 3 is formed on the outer periphery of the main body 2 to form a gear-shaped tool. Reference numeral 7 in the drawing denotes a mounting hole that is mounted on the main shaft of the cutter head. As shown in FIG. 2, a plurality of blade grooves 5 are formed on the tooth surface 4 of the tooth portion 3 of the shaving cutter 1, and a cutting edge 6 is formed on the tooth surface 4 by the blade groove 5.

The shaving cutter 1 is meshed with a work (not shown) at an axis crossing angle, and the one side (shaving cutter 1) is driven and rotated to rotate the work, so that the tooth surface of the work is finely formed by the cutting blade 6. And finish cutting. During cutting, dry cutting is performed without supplying cutting fluid. In the dry-cut processing, no cutting oil is used, so that there is no generation of stains and unusual odors on the floor, and no waste oil treatment is required. Therefore, it is suitable for improving the working environment and the global environment.

As the shaving cutter 1, a shaving cutter 1 made of high-speed tool steel (high-speed steel) in which at least the tooth surface 4 is coated with TiAl nitride or TiAl carbonitride is used.

As the shaving cutter 1, a high-speed tool steel shaving cutter is coated with TiAl nitride and TiAl carbonitride to form a coating film.
The temperature of Al rises due to the cutting heat, and as a result, is oxidized by the atmosphere to form an oxide film having high wear resistance on the surface of the coating film, and the shaving cutter 1 is less likely to be worn. Further, the oxide film has an effect of preventing oxidation inside the film, and can keep the adhesion of the coating film strong.

The shaving cutter 1 is substantially composed of (Ti
_(1-x) Al _x ) (N _y C _(1-y) ) (where 0.2 ≦ x
≦ 0.9, 0.2 ≦ y ≦ 1.0) at least one layer on the tooth surface 4 is used.

Then, (Ti _(1-x) Al _x ) (N _y C
_(1-y) ) (where 0.2 ≦ x ≦ 0.9, 0.2 ≦ y ≦
(Ti _(1-x) Al _x ) and (N _y C _(1-y) ) in the 1.0) film
Is (Ti _(1-x) Al _x ) :( N _y C _(1-y) ) = 1.1: 0.
From 9 it is between (Ti _(1-x) Al _x ) :( N _y C _(1-y) ) = 0.9: 1.1. That is, (Ti _(1-x) Al _x ) _(1-w) (N _y C
_(1-y) ) _w in w is 0.45 ≦ w ≦ 0.55.

Usually, (Ti _(1-x) Al _x ) and (N _y C _(1-y) )
Is assumed to be 1: 1.
There is no problem even if N and C are contained equally or more. N, C
When a large amount of is contained, solid solution strengthening can be expected.

As the shaving cutter 1, (Ti _(1-x)
When cutting (dry cutting) using a high-speed tool steel (SKH51) shaving cutter 1 coated with a single layer of a material consisting of Al _x ) N with a film thickness of 1.7 μm without supplying a cutting fluid Will be described.

FIG. 3 shows the values of x (seven types of 0.1, 0.2, 0.3, 0.5, 0.8, 0.9, 1.0) of the material having the composition of (Ti _(1-x) Al _x ) N and the surface roughness. Is shown. The shaving cutter 1 in FIG. 3 is a high-speed tool steel further coated with a material having a composition of (Ti _(1-x) Al _x ) N,
200rpm, 73 teeth, 200mm outer diameter, crossing angle 15 degrees.
The work material is SCr420, module m is 2.75, number of teeth is
37, tooth width is 13mm, helix angle is 20 degrees. In addition, the number of processed workpieces is 100.

In FIG. 3, the surface roughness (μm) is the worst value (μmR _max ) of all the plunge-shaved works. As shown in the figure, the value of x is 0.2 ≦
In the case of a coating film of (Ti _(1-x) Al _x ) N having a composition in the range of x ≦ 0.9, the surface roughness can be set to about 3 μmR _max , which is practical. When the value of x was 0.1 or 1.0, the coating film was peeled off after processing about 50 workpieces, and the surface roughness was about 23 to 28 μmR _max .

As described above, a high-speed tool steel shaving cutter 1 coated with a coating film of (Ti _(1-x) Al _x ) N having a value of x in the range of 0.2 ≦ x ≦ 0.9 is obtained. In addition, finish cutting can be realized in a state where a practical surface roughness can be obtained by dry cutting as well as wet cutting.

Next, as the shaving cutter 1, (Ti
_0.5 Al _0.5 ) (N _y C _(1-y) )
A case in which cutting is performed without supplying a cutting fluid (dry cutting) using a shaving cutter 1 made of high-speed tool steel (SKH51) coated at 1.7 μm will be described.

FIG. 4 shows the value of y (0.1, 0.2, _0.3, 0.6, 1.0 of 5) of a material having a composition of (Ti _0.5 Al _0.5 ) (N _y C _(1-y) ).
(Type) and the surface roughness. 4 is (Ti _0.5 Al _0.5 ) (N _y C _(1-y) )
High-speed tool steel coated with a material of the following composition: 200 rpm, number of teeth 73, outer diameter 200 mm, intersection angle
15 degrees. The work is made of SCr420 material and module m
2.75, 37 teeth, 13mm width, 20 degree helix angle.
In addition, the number of processed workpieces is 100.

In FIG. 4, the surface roughness (μm) is the worst value (μmR _max ) of all the plunge-shaved works. As shown in the figure, when the value of y is 0.2 ≦
(Ti _0.5 Al _0.5 ) (N _y C
_(1-y) when the coating film), can be a viable 3MyumR _max about the surface roughness. When the value of y was 0.1, the coating film was peeled off before all the workpieces were processed, and the surface roughness was about 24 μmR _max .

As described above, shaving made of high-speed tool steel coated with a coating film of (Ti _0.5 Al _0.5 ) (N _y C _(1-y) ) having a value of y in the range of 0.2 ≦ x ≦ 1.0. If the cutter 1 is used, finish cutting can be realized in such a state that practical surface roughness can be obtained by dry cutting as well as wet cutting.

Next, as the shaving cutter 1, (Ti
_When cutting (dry cutting) using a shaving cutter 1 made of high-speed tool steel (SKH51) coated with a material having a composition of _0.5 Al _0.5 ) N with various film thicknesses without supplying cutting fluid Will be described.

FIG. 5 shows the relationship between the film thickness of the material having the composition of (Ti _0.5 Al _0.5 ) N and the surface roughness. Shaving cutter 1 in FIG. 5, the thickness of the material having the composition of _{(Ti 0.5 Al 0.5) N,} 0.1 μm, 0.3 μm, 1.0 μm, 2.5 μm, 5.
High speed tool steel coated with 9 types of 0 μm, 10.0 μm, 15.0 μm, 15.5 μm, 16.0 μm
pm, number of teeth 73, outer diameter 200mm, crossing angle 15 degrees. The work material is SCr420, module m is 2.75, number of teeth is 37,
The tooth width is 13mm and the helix angle is 20 degrees. In addition, the number of processed workpieces is 100.

In FIG. 5, the surface roughness (μm) is the worst value (μmR _max ) of all the plunge-shaved workpieces. The thickness of the coating film is
If the coating film is a single layer, it represents the thickness of the single layer,
When a plurality of coating films are stacked, the total film thickness of the plurality of coating films is shown.

[0030] As can be seen from Figure 5, when the thickness of 15.0μm or less 0.3 [mu] m or more, can be the surface roughness of the tooth surfaces of the workpiece to approximately 3μmR _max. 0.1 μm film thickness
In the case of the coating film is worn at processing the workpiece about 70, the surface roughness becomes about 24μmR _max. On the other hand, when the film thickness was 15.5 μm and 16.0 μm, the coating film was peeled off when about 20 workpieces were processed, and the surface roughness became 15 to 25 μmR _max .

As described above, when the thickness of the coating film is 0.3
It was confirmed that when the thickness was not less than 1 μm and not more than 15.0 μm, the life of the coating film was made to a level that did not cause any problem.

The condition of the surface roughness of the work tooth surface with respect to the work material will be described with reference to FIG.

FIG. 6 shows the relationship between the work material and the surface roughness. As the material of the workpiece, carburized and hardened alloy steel (hardness H _B 120 to 250 DEG), carbon steel (hardness H _B 0.99 to 250 DEG),
Cast iron (hardness H _B 150 ~250) was used. The shaving cutter 1 in FIG. 6 is a high-speed tool steel coated with a material having a composition of (Ti _0.5 Al _0.5 ) N at a film thickness of 1.7 μm, a rotation speed of 200 rpm, a number of teeth of 73, an outer diameter of 200 mm, and an intersection angle. Is 15
Degrees. The work has a module m of 2.75, 37 teeth,
The tooth width is 13mm and the helix angle is 20 degrees. In addition, the number of processed workpieces is 100.

In FIG. 6, the surface roughness (μm) is
Worst value of all the workpieces that have been shaved
(ΜmR_max). As can be seen from FIG.
Drying with shaving cutter (conventional product) without shaving film
The surface roughness of the tooth surface of the work will cause carburizing and
25-40μmR for all materials including gold steel, carbon steel and cast iron
_maxAbout. Shaving with coated film
When dry cutting is performed with gutter 1 (product of the present invention),
Carburizing and case hardening alloy steel, carbon steel and casting
3-7μmR for all iron materials_maxCan be about
You.

As described above, if the shaving cutter 1 is made of a high-speed tool steel coated with a material having a composition of (Ti _0.5 Al _0.5 ) N, it is possible to use a work of various materials as dry cut as practically as wet cut. Finish cutting can be realized to obtain the roughness.

It is sufficient that the above-described coating film is coated on at least the tooth surface 4 of the tooth portion 3. For example, a coating film is applied to the entire tooth portion 3, or the shaving cutter 1 including the main body 1 is coated. It is also possible to apply a coating film to the whole.

The above-mentioned shaving cutter 1 uses a high-speed tool steel (high-speed) shaving cutter 1 coated with TiAl nitride or TiAl carbonitride. And shaving can be performed at high efficiency and at low cost without using expensive tools such as carbide.

Next, another example of the film coated on the shaving cutter 1 will be described. Shaving cutter 1
For example, a TiAl nitride or a TiAl carbonitride coated with a nitride-forming element capable of forming a high-quality nitride is used. A single-layer coating of either TiAl nitride or TiAl carbonitride to which a nitride-forming element is added, or a pinion cutter coated with at least one material in a multi-layer coating is used.

Here, as the nitride forming elements, Zr (zirconium), Hf (hafnium), Y (yttrium), V (vanadium), Nb (niobium), Ta (tantalum), Si (silicon), Cr (silicon) Chrome), Mo (molybdenum),
W (tungsten), B (boron), Mg (magnesium), Ca (calcium) and Be (beryllium) are applied.

That is, when the nitride-forming element is M,
To (Ti_zAl_xM_(1-zx))_(1-w)(N _yC_(1-y))_wPair of
(However, 0.2 ≦ x ≦ 0.9, 0.2 ≦ y ≦ 1.0, 0.1 ≦
z ≦ 0.8, 0.7 ≦ (z + x) <1.0, 0.45 ≦ w ≦ 0.55
At least one layer was applied to the shaving cutter 1.
Use things. The coating of the film is small.
At least on the tooth surface 4 of the shaving cutter 1 (see FIG. 2).
It only needs to be done.

Further, (Ti _z Al _x M _(1-zx) ) _(1-w) (N _y
C _(1-y) ) By defining the range of x in _w to be 0.2 ≦ x ≦ 0.9 and defining the range of y to be 0.2 ≦ y ≦ 1.0, the range of z is the range of 1 minus x. (Z =
1-x). For this reason, TiAl and NC have the same composition range as in the above case where the nitride-forming element M is not added, and substantially the same effect as the results of FIGS. 3 to 6 can be obtained. By adding the nitride forming element M, the nitride forming element M becomes Ti, Al
And a high-quality nitride can be formed.

Hereinafter, the case where V (vanadium), B (boron) and Zr (zirconium) are applied as typical elements of the nitride forming element M will be specifically described with reference to FIGS. FIG. 7 shows the state of the surface roughness when V and B are slightly added, and FIG. 8 shows the state of the surface roughness when V, B and Zr are added more than in FIG.

Here, the shaving cutter 1 rotates at a rotational speed of
200rpm, 73 teeth, 200mm outer diameter, crossing angle 15 degrees.
The work material is SCr420, module m is 2.75, number of teeth is
37, tooth width is 13mm, helix angle is 20 degrees. In addition, the number of processed workpieces is 100. In the figure, surface roughness (μm)
Is the worst value (μmR _max ) of all the plunge-shaved works.

As shown in FIG. 7, (Ti_zAl
_xM_(1-zx))_(1-w)(N_yC_(1-y))_wAs (Ti
_0.795Al_0.2V_0.005) N, (Ti_0.15Al_0.845V_0.005) N, (Ti
_0.5Al_0.45B_0.05) (N_0.9C _0.1))
The layer is coated on the shaving cutter 1 with a thickness of 1.7 μm.
The surface roughness of the tooth surface of the work is 3-4μmR
_maxThus, a practically usable surface roughness is obtained. For this reason,
With slight addition of nitride forming elements V and B
The same surface as when no nitride-forming element is added
Roughness can be obtained. By the above, wet cut
Finished to a practically dry-cut surface roughness
Cutting can be realized.

As shown in FIG. 8, (Ti _z Al
_x M _(1-zx) ) _(1-w) (N _y C _(1-y) ) _w as (Ti _0.5
Al _0.4 V _0.1 ) N, (Ti _0.6 Al _0.2 B _0.2 ) N, (Ti _0.4 Al _0.3 V _0.3 )
_{(N 0.7 C 0.3), (} Ti 0 .4 Al 0.3 Zr 0.3) When coated in shaving cutter 1 at least one layer of the film of the composition of (N _0.5 C _0.5) with a thickness of 1.7 [mu] m, the surface of the tooth surface of the workpiece Roughness is 3
In ~4μmR _{ma x,} practical surface roughness is obtained. Therefore, even when the nitride forming elements V, B, and Zr are added more than in FIG. 7, the same surface roughness can be obtained as in the case where the nitride forming element is not added. As described above, finish cutting can be realized in a state in which practical surface roughness can be obtained by dry cutting as well as wet cutting.

If the amount of the added nitride-forming element exceeds 0.3 as compared with the composition of the TiAl-added element, the film is liable to peel off. Is preferably 0.3 or less. If the amount of the nitride-forming element exceeds 0.3 (z + x is less than 0.7) as compared with the composition of the TiAl-added element, that is, if the proportion of the nitride-forming element M is too large, the basic characteristics of TiAl are impaired and peeling occurs. Will occur.

Next, the case where the ratio of the metal element (TiAl, the nitride forming element to be added) and the nonmetal element (N) containing C is changed will be specifically described with reference to FIG. FIG. 9 shows the relationship between the cutting speed and the flank wear when the composition ratio of the metal element and the nonmetal element including C is changed between 0.45 and 0.55. The processing conditions are the same as those shown in FIGS.

As shown in FIG. 9, (Ti _z Al
_x M _(1-zx) ) _(1-w) (N _y C _(1-y) ) _w as (Ti _0.5
Al _0.4 V _0.1 ) _0.45 N _0.55 and (Ti _0.5 Al _0.4 V _0.1 ) _0.55 N _0.45
When the shaving cutter 1 is coated with a film having a composition of at least one layer with a film thickness of 1.7 μm, the surface roughness of the tooth surface of the work is 2.5 when the metal element is large or the non-metal element including C is large. ~ 3μmR _max ,
Practical surface roughness is obtained. For this reason, in both cases where there are many metal elements and where there are many non-metal elements including C 2, finish cutting can be realized in a state where practical surface roughness can be obtained by wet cut and dry cut as well.
Here, w is set to 0.45 ≦ w ≦ 0.55 because w is 0.45 ≦ w ≦ 0.55.
If the value is out of the range of ≦ w ≦ 0.55, the film may be peeled off or the abrasion resistance of the film may be reduced.

Usually, (Ti _z Al _x M _(1-zx) ) and (N _y
The ratio of C _(1-y) ) _w is assumed to be 1: 1. However, the ratio of nonmetallic elements including N and C to the metal elements Ti and Al and the added nitride-forming element is increased. There is no problem even if it is small. When the amount of nonmetallic elements including N and C is increased, solid solution strengthening can be expected.

As described above, even if a film containing V, B and Zr added as a nitride forming element M is coated and dry-cut, a practically usable surface roughness is obtained.
, B and Zr, the same wet cut and finish cutting as in the case of not adding Br and Zr can be realized, and shaving can be performed with high efficiency and at low cost. It should be noted that even if a film to which an element other than V, B, and Zr is added as the nitride-forming element M is coated and dry-cut, V, B, and Zr are obtained.
High efficiency and low cost processing can be realized as in the case of adding.

By blowing air to the cutting portion during the dry cutting by the shaving cutter 1, chips generated at the cutting portion are removed. That is, in the conventional method of applying a cutting fluid, the generated chips are washed away with the cutting fluid, and the chips in the cutting portion do not bite between the work and the shaving cutter 1, but if the cutting fluid is not applied, The work may be damaged due to biting. If air is supplied to the cutting portion during the dry cutting process as in the present embodiment, chips generated in the cutting portion are blown off and removed, and there is no occurrence of chipping or the like.
It should be noted that when a small amount of cutting oil is put into air and mist-shaped and blown to the cutting portion, almost the same effect as in dry cutting can be obtained.

[0052]

According to the shaving cutter of the present invention, (Ti _(1-x) Al _x ) (N _y C _(1-y) ) wherein 0.2 ≦ x ≦ 0.9 0.2 ≦ y ≦ 1.0 Is coated on at least one tooth surface of a shaving cutter made of high-speed tool steel, so that even if a work is processed by dry cutting, the surface roughness of the tooth surface can be finished to the same level as wet cut. For this reason, dry cutting of the shaving process at the time of gear processing becomes possible. As a result, dry cutting of the entire gear processing line can be achieved, the amount of cutting oil used can be significantly reduced, the processing cost can be reduced, and the use of cutting oil and disposal of used cutting oil can be achieved. It is possible to prevent the surrounding environment from being adversely affected during processing.

In addition, the shaving cutter of the present invention substantially comprises (Ti _(1-x) Al _x ) _(1-w) (N _y C _(1-y) ) _w where 0.2 ≦ x ≦ 0.9 0.2 ≦ y ≦ 1.0 0.45 ≦ w ≦ 0.55 At least one layer of a film having the composition of w is coated on at least the tooth surface of the shaving cutter made of high-speed tool steel. The degree can be finished as wet cut. For this reason, dry cutting of the shaving process at the time of gear processing becomes possible. As a result, dry cutting of the entire gear processing line can be achieved, the amount of cutting oil used can be significantly reduced, the processing cost can be reduced, and the use of cutting oil and disposal of used cutting oil can be achieved. It is possible to prevent the surrounding environment from being adversely affected during processing. In addition, it is expected that solid solution strengthening of the coating film can be expected by adding N, C to the metal elements Ti, Al in the same amount or more.

Further, the shaving cutter of the present invention is characterized in that the nitride forming element is M and (Ti _z Al _x M _(1-zx) ) _(1-w) (N _y C _{(1-y) w} However, at least one layer of a film having a composition of 0.2 ≦ x ≦ 0.90.2 ≦ y ≦ 1.00.1 ≦ z ≦ 0.80.7 ≦ (z + x) <1.00.45 ≦ w ≦ 0.55 is used as at least a shaving cutter made of a high-speed tool steel. Since the tooth surface is coated, even if the work is processed by dry cutting, the surface roughness of the tooth surface can be finished to the same level as wet cut. For this reason, dry cutting of the shaving process at the time of gear processing becomes possible. As a result, dry cutting of the entire gear processing line can be achieved, the amount of cutting oil used can be significantly reduced, the processing cost can be reduced, and the use of cutting oil and disposal of used cutting oil can be achieved. It is possible to prevent the surrounding environment from being adversely affected during processing. In addition, it is expected that solid solution strengthening of the coating film can be expected by adding N, C to the metal elements Ti, Al in the same amount or more.

Further, the shaving method of the present invention
Since the shaving is performed by dry cutting in which cutting is performed without using a cutting oil by the above-described shaving cutter, the amount of cutting oil used can be significantly reduced, and the processing cost can be reduced, and the use of cutting oil can be reduced. And the surrounding environment generated when the used cutting fluid is discarded can be prevented. In addition, since air is blown to the cutting portion, shaving can be performed by dry cutting without chipping.

[Brief description of the drawings]

FIG. 1 is a front view of a shaving cutter according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of an arrow II part in FIG.

FIG. 3 is a graph showing a state of surface roughness.

FIG. 4 is a graph showing the state of surface roughness.

FIG. 5 is a graph showing the state of surface roughness.

FIG. 6 is a graph showing a state of surface roughness.

FIG. 7 is a graph showing the state of surface roughness.

FIG. 8 is a graph showing the state of surface roughness.

FIG. 9 is a graph showing a state of surface roughness.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaving cutter 2 Main body 3 Tooth part 4 Tooth surface 5 Tooth groove 6 Cutting blade 7 Mounting hole

Continued on the front page (72) Inventor Satoshi Morimoto 130 Rokujizo, Ritto-cho, Kurita-gun, Shiga Prefecture Mitsubishi Heavy Industries, Ltd.Kyoto Seiki Seisakusho Inside the Precision Machine Works

Claims (5)

[Claims] (1) Substantially, (Ti _(1-x) Al _x ) (N _y C _(1-y) ) wherein at least one layer having a composition of 0.2 ≦ x ≦ 0.9 0.2 ≦ y ≦ 1.0 A shaving cutter characterized in that at least a tooth surface of a high-speed tool steel shaving cutter is coated. (Ti _(1-x) Al _x ) _(1-w) (N _y C _(1-y) ) _w where 0.2 ≦ x ≦ 0.9 0.2 ≦ y ≦ 1.0 0.45 ≦ w A shaving cutter characterized in that at least one layer of a film having a composition of ≤0.55 is coated on at least a tooth surface of a high-speed tool steel shaving cutter. 3. The method according to claim 1, wherein the nitride forming element is M, and (Ti _z Al _x M _(1-zx) ) _(1-w) (N _y C _(1-y) ) _w where 0.2 ≦ x ≤ 0.9 0.2 ≤ y ≤ 1.0 0.1 ≤ z ≤ 0.8 0.7 ≤ (z + x) <1.0 0.45 ≤ w ≤ 0.55 At least one coating of at least one tooth surface of a shaving cutter made of high-speed tool steel. Characteristic shaving cutter. 4. A shaving method using the shaving cutter according to any one of claims 1 to 3, wherein the shaving is performed by dry cutting in which cutting is performed without using a cutting oil. 5. The shaving method according to claim 4, wherein air is blown to the cutting portion.