MXPA99011036A - Gear shaping method and device and spiral bevel gear cutter - Google Patents

Abstract

A method of shaping a bevel gear with high efficiency and at low cost, wherein, when an annular milling cutter (21) comprising a high-speed steel tool blade material (23) attached to a main body (22) is used to create a bevel gear, a blade material (23) having at least one layer of coating film having a composition of substantially (Ti (1-x) A1x) (Ny C (1-y)) (provided, 0.2=X=0.85, 0.2=y=1.0) is used as the cutting material (23), dry cutting not using a cutting fluid for cutting is performed at cutting speeds of not lower then 20 m/min and not higher than 400 m/min, and a cutting speed is significantly improved without using an expensive cemented carbide tool.

Description

METHODS OF GEAR SIZE, APPARATUS FOR CARVING GEARS AND BLADE FOR CARVING CONICAL GEARS HELICAL TOOTH TECHNICAL FIELD The present invention relates to a gear cutting method and an apparatus for carving gears to generate a bevel gear using a helical tooth bevel gear cutting blade, which has a blade material made of tool steel mounted on it. Of high speed. PREVIOUS TECHNIQUE When generating a bevel gear, for example, a bevel helical bevel gear or a hypoid gear using a helical gear bevel gear knife, a helical gear gear cutting machine is used. A profile of a spiral bevel gear beveling machine will be described with reference to Figure 21. Figure 21 illustrates a short construction of a helical gear bevel gear carving machine. In a helical toothed bevel gear cutting machine 1, an annular cutter blade 2, for example, a helical tooth bevel gear cutting blade is mounted on a main shaft 4 of a knife head 3, and a piece 5 is connected with the side 6 of the arrow of the piece. The rotating central axes of the main arrow 4 and the arrow of the piece 6 are arranged crosswise when viewed in a plane. The knife head 3 is supported in such a way that it can rotate about the central mechanical axis, and the main shaft 4 _ is rotatably supported on the knife head 3. The arrow of the piece 6 rotates in collaboration with the rotation of the main shaft 4 and blade head revolution 3. In Figure 21, numeral 7 indicates a nozzle for supplying blade lubricant 8. The ring bit knife 2, as shown in Figure 22, comprises a variety of materials of blade 10 made of high speed steel mounted in the form of a ring on the outer periphery of the main body formed by a disc 9. When generating the teeth in piece 5 using the machine for carving helical bevel gear 1, piece 5 is mounted on the arrow side of the part 6, and the annular cutter blade 2 is mounted on the side of the main arrow 4. The cutter head 3 rotates and the main arrow 4 is It rotates vertically to rotate around the annular cutter blade 2, and the arrow on part 6 rotates to rotate part 5. The annular cutter blade X rotates around the mechanical center while rotating with a flat conical gear virtual, in such a way that it is represented by an edge of the annular reamer blade 2. The part 5 is rotated to mesh with the toothed surface, with which the toothed surface is generated in the part 5. During the gear cutting work, the blade lubricant 8 is fed from the nozzle 7 to the cutting portion to lubricate and cool the cutting portion. To reduce the cost of machining in the generation of teeth with the annular cutter blade 2, it is necessary to rotate the annular cutter blade 2 at a higher speed, so that the machining is carried out in a short time. In the present situation, however, the peripheral speed (milling speed) of the annular cutter blade 2 is limited due to the wear of the cutter, and therefore, there is a limitation in the reduction of the machining time. This is currently an obstacle to reducing the cost of machining. Recently, a high-speed machining technique has been invented which uses an annular cutter blade 2 applied to the material of the blade 10 made with a cemented carbide, and thus, the generation of teeth with the machine for carving helical bevel gear. 1 has become more efficient. In the case of the use of the annular cutter blade 2 applied with knife material made with cemented carbide, a heat crack will appear if the machining is done with the blade lubricant supply, because the cemented carbide is fragile. For this reason, in the case of the use of an annular cutter blade 2 applied with the knife material 10 made with cemented carbide, the application of a dry cutting method becomes a main stream in which the machining is performed without the supply of blade lubricant. Since the cemented carbide has a much higher resistance to heat and wear than the high speed steel, no problem occurs, even if a dry carving is performed. As mentioned above, the machining efficiency is improved by using an annular cutter blade "2" apli_cada__ with the blade material 10 made of cemented carbide, and it may be possible to reduce the cost of machining thanks to the higher machining efficiency . However, the blade material made from cemented carbide is so costly that the total cost becomes extremely high, even if the machining efficiency is improved.In addition, since the cemented carbide is brittle, there is a fear that they can. Sudden fissures occur For this reason, the blade material 10 made with cemented carbide does not currently have an extended practical use.

The present invention has been achieved taking into account the aforementioned circumstances and it is an object of the present invention to provide a gear cutting method and an apparatus for carving gears capable of considerably improving the cutting speed without using blade material made with carbide cemented for the blade to carve helical gear bevel gears. Another object of the present invention is to provide a helical toothed bevel gear cutting blade capable of greatly improving the cutting speed without using a cemented carbide blade material. PRESENTATION OF THE INVENTION According to the present invention which achieves the above objectives, a gear cutting method is provided to generate a bevel gear characterized in that when using a blade to cut helical gear bevel gears with a blade material made of steel for high speed tools mounted on the main body of a blade and coated with at least one layer of a film of a composition comprising substantially TiAlN, teeth are generated by dry cutting without using blade lubricant at a cutting speed of the range from 20 to 400 m / min.

In accordance with the present gear cutting method, teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive knife material, for example, a tool made of cemented carbide or the like. In addition, the gear size method according to the present invention which achieves the above objectives is characterized in that the teeth of a bevel gear are generated using a helical tooth bevel gear cutting blade having a blade material made of steel for high speed tools mounted on a main body of the blades, the blade material being coated with at least one layer of a film of a composition comprising substantially: (Ti (1_x) Alx) (NyC (1_y)) in where, 0.2 x 0.85, 0.2 and 1.0 with the cutting speed in a range of 20 to 400 m / min, and the teeth being generated by dry cutting without using a blade lubricant. With the present method, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade, made of cemented carbide or the like. ~ ~ Even more, the gear-cutting method that the above objectives are characterized in that the teeth of a bevel gear are generated using a blade to cut helical gear bevel gears with a blade material made with high-speed tool steel mounted in the main body of a blade, the blade material being coated with at least one layer of a film of a composition comprising substantially: (TizAlxM (1_2_x)) (1.w) (NyC (1.y)) w where, 0.2 0.85, 0.2 and 1.0 0.45 w 0.55. being the! ~ cutting speed in a range of 20 to 400 m / min, and teeth are generated by dry cutting without using a blade lubricant. With the present method, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade made of cemented carbide or the like, and N and C are in equal or equal amounts. greater than Ti and Al which are metallic elements, whereby the reinforcement of the coating film solution can be expected. Still further, in accordance with the present invention which attains the above objectives, there is provided a method for carving gears characterized in that the teeth of a bevel gear are generated using a helical tooth bevel gear cutting blade having a blade material made with high-speed tool steel mounted on the main body of a blade, wherein a nitride-forming element is represented by M, the blade material being coated with at least one layer of a film of a composition comprising substantially: (Ti2AlxM (1-zx)) (! - ") (NyC (1_y)) w where, 0.2 x 0.85, 0.2 y_ 1.0. 0.15 z 0.8 0.7 (z + x) <; 1.0 0.45 w 0.55. the cutting speed being in a range of 20 to 400 m / min, and the teeth being generated by dry cutting without using a blade lubricant. With the present method, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade made of cemented carbide or the like, and N and C are in equal or greater amounts Ti and Al are metallic elements, whereby the reinforcement of the coating film solution can be expected. Still further, the gear cutting method of the present invention is characterized in that the cutting speed is in the range of 40 to 120 m / min. Still further, the gear cutting method according to the present invention is characterized in that the teeth are generated while air is blown against the cutting portion to remove the milling debris. Even more, during the gear-cutting work, teeth are generated while air is blown against the "carving portion in one direction along the rotating direction of the blade for cutting bevel helical bevel gears to blow the milling waste, and from the outer periphery towards the center of the blade for cutting conical gears of helical toothing to blow the milling waste from a space between the knife materials, and cooling air is blown against the piece. This prevents the carving waste from picking up the part, and even more, the gear generated is a bevel gear used for an automotive reduction device.

A gear size device of the present invention that achieves the above objectives to generate a bevel gear is characterized in that the main tool arrow of a cutter head supporting a bevel gear cutter with helical toothing supporting a cutter for cutting bevel helical gears and an arrow for part supporting a part are arranged in such a way that their rotating central axes intersect each other, the cutter head is supported in such a way that it can rotate about a mechanical center, the cutter for carving helical bevel gears and the workpiece engage with each other by rotating the arrow of the workpiece in cooperation with the rotation of the main arrow of the tool and the revolution of the cutter head, where the cutter for carving gears tapered helical gear has mounted on itself blade material r Coated with at least one layer of a film of a composition comprising substantially TiAlN, the teeth are generated by dry cutting without using blade lubricant at a cutting speed in the range of 20 to 400 m / min. With the present apparatus, teeth of a bevel gear can be generated at a much higher cutting speed without using an expensive blade material, for example cemented carbide tool material or the like. Still further, in accordance with the present invention which attains the above objects, an apparatus for carving gears is provided for generating a bevel gear characterized in that the main arrow of the tool of a blade head supporting a blade for bevel gear gears and an arrow for part supporting a part are arranged in such a way that their rotating central axes intersect each other, the cutter head is supported in such a way that it can rotate around a mechanical center, the cutter for carving helical gear bevel gears and the part is engaged with each other by rotating the arrow of the piece in collaboration with the rotation of the main arrow of the tool and the revolution of the blade head, wherein the blade for carving helical gear bevel gears has mounted on itself material of blade coated with at least one layer of a film of a composition comprising substantially: (Ti (1_x) Alx) (NyC (1.y)) where, 0.2 x 0.85, 0.2 and 1.0, the cutting speed being in a range of 20 to 400 m / min, and the teeth being generated by dry cutting without using a blade lubricant. With the present apparatus, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade made of cemented carbide or the like. Still further, in accordance with the present invention, which attains the above objectives, there is provided an apparatus for carving gears to generate a conical gear characterized in that the main arrow of the tool of a blade holder bearing a blade for bevel gear helical gears. and an arrow for part supporting a part are arranged in such a way that their rotating central axes intersect each other, the cutter head is supported in such a way that it can rotate around a mechanical center, the cutter for carving bevel gear teeth helical and the part are interlocked by rotating the arrow of the piece in collaboration with the rotation of the main arrow of the tool and the revolution of the blade head, where the blade to carve helical gear bevel gear has mounted on itself blade material coated with at least one layer of a film particle of a composition comprising substantially: (Ti (1_x) Alx) (NyC (? _ y,) w where, 0.2 x 0.85, "0.2 and 1.0, 0.2 0.55, the cutting speed being in a range of 20 to 400 m / min, and the teeth being generated by the dry size without using a blade lubricant With the apparatus according to the present invention, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade made of cemented carbide or the like, and N and C they are in "amounts equal to or greater than Ti and Al which are metallic elements, whereby the reinforcement of the coating film solution can be expected. Still further, in accordance with the present invention which achieves the above objectives, it is characterized in that the teeth of a bevel gear are generated using a helical tooth bevel gear cutting blade having a blade material made of high speed tool steel. mounted on a main body of the blades, the blade material being coated with at least one nail film layer of a composition comprising substantially: (TÍ (1.X, A1X) (NyC (? - y,) w where, 0.2 x 0.85, 0.2 and 1.0 0.15 z 0.8 0.7 (z + x) <; 1.0 0.45 0.55; the cutting speed being in a range of 20 to 400 m / min, and the teeth being generated by dry cutting without using a blade lubricant. With the apparatus according to the present invention, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade made of cemented carbide or the like and N and C are found in amounts equal to or greater than Ti and Al which are metallic elements, whereby the reinforcement of the coating film solution can be expected. Still further, the gear cutting method of the present invention is characterized in that the cutting speed is in the range of 40 to 120 m / min. Still further, the gear-cutting apparatus of the present invention is characterized in that air supply mechanisms are provided for blowing air and blowing milling waste against the milling portion. Still further, a first air nozzle is provided for blowing air to blow the milling waste against the milling portion in a direction along the rotational direction of the conical helical tooth blade, and a second nozzle is provided. for blowing air to blow the milling debris from a space between the knife materials, and cooling air is blown against the piece, and a third nozzle is provided for blowing air to cool the piece. This prevents that the waste of carving bites the piece. A cutting blade for helically toothed bevel gear in accordance with the present invention which achieves the above objectives is characterized by a blade made of high-speed tool steel mounted on a main body of a blade and coated with at least one blade. layer of a film of a composition substantially comprising TiAlN, the teeth are generated by dry cutting without using blade lubricant at a cutting speed in a range of 20 to 400 m / min. With the present invention, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade made of cemented carbide or the like. In addition, a helical tooth bevel gear cutting blade that reaches the above objectives is characterized by a blade made of high speed tool steel mounted on the main body of a blade and coated with at least one layer of a film of a composition comprising substantially: (Ti (i -?) Alx) (iw) (NyC (iy)) wherein, 0.2 x 0.85, 0.2 and 1.0 with the milling speed in a range of 20 to 400 m / min, and teeth are generated by dry cutting without using a blade lubricant. With the apparatus according to the present invention, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade made of cemented carbide or the like. Still further, a helically toothed bevel gear cutting blade that achieves the above objectives is characterized by a blade made of high speed tool steel mounted on the main body of a blade and coated with at least one layer of a film of a composition comprising substantially: (TÍ (l -?) Al?) (1-W) (NyC (ly)) where, 0.2 x 0.85, 0.2 and 1.0 0.45 0.55, the milling speed being in a range of 20 at 400 m / min, and teeth are generated by dry cutting without using a blade lubricant. With the apparatus according to the present invention, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade made of cemented carbide or the like, and N and C are "in amounts equal to or greater than Ti and Al which are metallic elements, whereby the reinforcement of the coating film solution can be expected. Further, in accordance with the present invention which attains the above objectives, a gear-cutting method is provided characterized in that the teeth of a bevel gear are generated using a helical tooth bevel gear cutting blade having a blade material made of steel. for high speed tools mounted on the main body of a blade, where a nitride forming element is represented by M, the blade material being coated with at least one layer of a film of a composition substantially comprising: (TizAlxM (1.z_x)) (1.w) (NyC (1_y)) w where, 0.2 x 0.85, 0.2 and 1.0 0.15 z 0.8 0.7 (z + x) <; 1.0 0.45 w 0.55. the cutting speed being in a range of 20 to 400 m / min, and the teeth being generated by dry cutting without using a blade lubricant. According to the present invention, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade made of cemented carbide or the like, and IST and C are in equal amounts. or older than Ti and Al. they are metallic elements, whereby the reinforcement of the solution of the coating film can be expected. The cutting speed is in a range of 40 to 120 m / min. Furthermore, the teeth are generated by blowing air to blow the milling waste against the milling portion. Furthermore, during the gear-cutting work, the teeth are generated by blowing air against the cutting portion in a direction along the rotating direction of the blade to cut helically-geared bevel gears to blow the debris from. carving, and from the outer periphery to the center of the blade to carve conical gears of helical toothing to blow the carving waste from a space between the blade materials and air is blown to cool the piece. This prevents that the waste of carving bites the piece. Even more, the generated gear is a bevel gear used for an automotive reduction device. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic construction diagram of an apparatus for carving gears in accordance with an embodiment of the present invention; Figure 2 is a plan diagram showing an annular cutter blade for carrying out the gear size method of the present invention; Figure 3 is a schematic diagram taken along line II-II of Figure 2; Figure 4 is a graph showing the state of flank wear; Figure 4 is a front diagram of a milling cutter; Figure 5 is a graph showing the state of crater wear; Figure 6 is a graph showing the state of flank wear; - Figure 7 is a graph showing the state of crater wear; Figure 8 is a graph showing a relationship between film thickness and flank wear; Figure 9 is a graph showing a relationship between the axial feed and the milling speed; "Figure 10 is a graph showing a relation between the material of the piece and the milling speed, Figure 11 is a graph showing a relationship between the blade material and the milling speed, Figure 12 is a graph which shows a relationship between the size of the main body and the milling speed; Figure 13 is a graph showing a relationship between the width of the point and the milling speed; Figure 14 is a graph showing a comparison with the prior art; Figure 15 is a graph showing a comparison with the prior art; Figure 16 is a graph showing a relationship between flank wear and milling speed when coated with TizAlxM (? _ Z-X)) a-W) (NyC (? _ Y)) w; Figure 17 is a graph showing a relationship between flank wear and velocity carved when coated with (TizAlx (1.z.x)) (1_w) (NYC (1_ y)) W; Figure 18 is a graph showing a relationship between flank wear and milling speed when coated with (TizAlxM (i-z_X)) < ? -w) (NyC d_ L ~ > y) / Figure 19 is an outer appearance of an annular cutter blade according to another embodiment; Figure 20 is a schematic diagram of an annular burr blade; Figure 21 is a diagram showing the entire construction of a conventional machine for carving helical bevel gears; Figure 22 is an outer appearance of an annular cutter blade.

OPTIMAL MODE FOR CARRYING OUT THE INVENTION TO PRACTICE The preferred embodiments of the present invention will now be described with reference to the drawings. However, the types of material, shapes, relative positions of these and the like of the elements provided in the embodiments are provided by way of illustration only, and, therefore, are not intended to limit the present invention. unless otherwise specified. The construction of a helical gear bevel gear cutting machine as the gear cutting apparatus for effecting the gear cutting method of the present invention and the construction of an annular cutter blade as a blade for cutting helical gear bevel gears will be described reference to Figures 1 to 3. Figure 1 schematically illustrates the machine for carving helical bevel gear, Figure 2 is a plan illustration of an annular cutter blade, and Figure 3 is a sectional diagram taken as along the line II-II of Figure 2. As shown in Figure 1, on a helical gear bevel gear machining machine 31, an "annular burr 21 blade as a helical tooth bevel gear cutting blade is mounted on the side of a main arrow 34 of a knife head 33, and a piece 35 is mounted on the side of the arrow for piece 36. The axes rotate parts of the main arrow 34 and the arrow for part 36 are arranged to intersect when viewed in a plane. The knife head 33 is supported to rotate about a mechanical center, and the main shaft 34 is rotatably supported on the knife head 33. The piece arrow 36 rotates in cooperation with the rotation of the main shaft 34 and the revolution of the cutting head 33. Since the gear cutting method according to the present invention generates teeth by dry cutting, no nozzle is provided to supply a blade lubricant. On the side of the cutter head 33, a first air nozzle 51 is provided as an air supply mechanism for blowing air towards the cutting portion of the annular cutter blade 21, and on the side of the cutter head 33, there is provided a second air nozzle 52 for blowing air towards the annular cutter blade. In addition, on the side of a workpiece head 55, a third nozzle 53 is provided to blow air to a portion other than that for carving the workpiece 35. When teeth are generated in the workpiece 35 using the helical gear bevel gear cutter. 31, the part 35 is mounted on the side of the arrow for parts 36, and the annular cutter blade 21 on the side of the main arrow 34. The cutter head 33 is rotated and the main arrow 34 is rotatably driven to rotate. around the annular cutter blade 21, and the part arrow 36 is rotated to rotate the part 35. When it rotates, the annular cutter blade 21 rotates around the mechanical center along the virtual planar bevel gear, in such a way that the toothed surface of the virtual flat bevel gear is represented by a cutting edge of the annular cutter blade 2. The part 35 is rotated to mesh with the toothed surface, so that the surface ie toothed is generated in the piece 5. To the piece 35 generated by teeth through the annular cutter blade 21 using the helical gear bevel gear cutting machine 31 can be used, for example, as a gear for automotive reduction. As shown in Figures 2 and 3, the annular cutter blade 21 as a helically toothed bevel gear cutter blade is provided with a plurality of blade materials 23 mounted in a ring shape on the outer periphery of the main body formed by disks 22. The blade material 23 has an outer blade 24 and an inner blade 25, with a point width P of 0.06 inches between the outer blade 24 and the inner blade 25, and a pressure angle S of 10 to 20 degrees, and in a straight direction. When the teeth are generated in the part using the helical gear bevel gear machine 31, the annular cutter blade 21 fixed therewith with the knife materials rotates about the mechanical center along with the virtual plane bevel gear, in such a way that the toothed surface of the virtual planar bevel gear is represented by the cutting edge of the annular cutter blade 21 and the part is rotated to mesh with the toothed surface, so that the toothed surface is generated in the piece, thus making exploded the gear in the helical gear helical gear. A hypoid gear is similarly machined to generate the serrated surface. During gear cutting work, the size is carried out without the supply of a blade lubricant (dry cutting). In dry cutting, since lubricant is not used for blades, the floor is not stained or bad smell is generated, and waste lubricant treatment becomes unnecessary. Therefore, dry cutting is adequate to improve the work environment as well as the general environment. In dry cutting, the gear size is performed while air is blown from the first air nozzle 51 and the second air nozzle 52. From the first air nozzle 51, air is blown against the portion of air. carving of the piece 35, and the carving waste generated in relation to the carving is blown from the carving portion. From the second air nozzle 52, air is blown towards the center from the outer peripheral direction of the annular cutter knife blade 21 against a space between the knife materials 23 for blowing the cut waste from the space between the cutters. blade materials 23. When machining a conical gearing ~ of helical toothing when blowing air from the first air nozzle 51 and the second air nozzle 52, the generation of teeth can be achieved with great efficiency and low cost without generating pickets on the part of the detailed waste. In addition, it is also possible to mix a small amount of knife lubricant in the blown air from the first air nozzle 51 which will be blown in the form of a mist. In addition, during the gear size, the size is made by blowing air from the third air nozzle 53. From the third air nozzle 53, air is blown to a portion other than that of the part 35 to cool the part 35. If necessary, it is also possible to make the carving without blowing air from the second air nozzle 52 and the third air nozzle 53. In this case, it is also possible to use a spiral bevel gear carving machine that is not provided with the first air nozzle 51, second air nozzle 52 and third air nozzle 53. As a knife material 23, a material made of high speed steel and coated with a TiAl nitride (TiAlN) or TiAl carbonitride is used. . The TiAl nitride or TiAl carbonitride coating the blade material "23" is used in a single layer and at least one multi-layer coating layer, since the blade material 23 is manufactured with high speed steel, "cost reduction can be achieved at low cost." When coating the blade material 23 with Ti Al nitride or TiAl carbonitride, the Al of the coating film increases its temperature due to the heat of the size and as a result , the air oxidizes it to form an oxide film of high moisture resistance on the surface of the coating film, thereby rendering the blade material 23 moisture resistant. Furthermore, this oxide film has an effect which suppresses the oxidation inside the film, thus maintaining the adhesive strength of the coating film at a high value.

In the composition comprising substantially (Ti (iX) A1X) (NyCcL-y)) (where, 0.1 <x = 0.9, 0.25 < and <1.0), the ratio of (Ti (1_x) Alx) to NyC (? _ Y) ) it is between (TÍ (1_X) A1X): (NyCcL-y)) = 1.1: 0.9 y (Ti (1_x) Alx): (NyC (1.y, = 0.9: 1.1) That is, in (TizAlxM (1_z.x) ) (? _w) (NyC (1_y)) w, w is 0.45 < w < 0.55. Normally, the ratio of (Ti (1_X) A1X) to (NyCa-y) is set to 1: 1, however, there is no problem even if N and C are added in larger amounts to Ti and Al which are elements metallic, to obtain a solid effect of solution reinforcement. The method for milling gears according to the present invention using the annular cutter blade 21 described above will be described. The size is realized without the supply of a blade lubricant (dry cutting) using a blade material 23 made of a high speed steel (SKH55) coated with a 1.7 μm thick film layer of a composition comprising ( Ti (? X) Alx) as the knife material 23 of the annular burr blade 21. FIG. 4 illustrates the relationship between the value of x of the material having the composition of (Ti (i _X) A1X) N and the flank wear, and Figure 5 illustrates the value of x of the material having the composition of (Ti (1_X) A1X) N as compared to the wear of the crater. The blade material 23 of Figures 4 and 5 is a high-speed steel coated with a layer of a material with a composition of (Ti (_ X) Alx) N with a P-spot width of 0.06 inches, an angle of S pressure of 10 to 20 degrees, and directed in the straight direction. In addition, the main body 22 has a size of 6 inches, and the part is made of an SCM435 material, the number of pieces to be machined is 300, and the cutting speed varies and can be 20 m / min, 40 m / min, 120 m / min, 200 m / min and 400 m / min. As shown in Figures 4 and 5, the knife material 23 coated with a film with the composition of (Tí (? _ X) Alx) with an x value in the range of 0.2 x 0.85 is below a practical limit (0.2 mm) in terms of flank strength and crater resistance at milling speeds of 20 m / min, 40 m / min, 120 m / min, 200 m / min, and 400 m / min, and therefore Therefore, it can be used in a practical way. As described above, when a bevel gear is generated by dry cutting and with the use of an annular cutter blade 21 applied with the knife material 23 applied with a high speed steel coated with a film having a composition of (FIG. Ti (? -x) Alx) N with a value x in the range of 0.2 x 0.85 at a cutting speed of 400 m / min or less, the generation of teeth with high efficiency at low cost can be achieved. Even, it is even more preferable when the milling speed is from 40 to 120 m / min. A second embodiment of the gear cutting method of the present invention will be described. The size is realized without the supply of blade lubricant (dry size) using a blade material 23 made of high speed steel (SKH55) coated with a 1.7 μm thick film layer of a composition comprising (TÍ0. 5AI0.5) (NyC (1-y)) as the knife material 23 of the annular cutter blade 21. Figure 6 shows the value of y of the material having the composition (TÍ0.5AI0.5) compared to the wear of the flank, and Figure 7 shows the value of the y of the material having the composition comprising (TÍ0.5AI0.5) (NyC (? - y)) in comparison with flank wear. The blade material 23 of Figures 6 and 7 is a high speed steel coated with a layer of a film of a composition comprising (TÍ0.5AI0.5) (NyC (iy)), with a spot width P of 0.06 inches, an angle of pressure S of 10 to 20 degrees, and directed in the straight direction, and the piece is of a material of SCM435, the number of pieces that will be machined is 300, and the speed of carving varies and can be 20 m / min, 40 m / min, 120 m / min, 200 m / min and 400 m / min. As shown in Figures 6 and 7, the blade material 23 coated with a film of a composition of (Ti05AI0.5) (NyC (iy)) with a value y in the range of 0.2 and 1.0 is below a practical limit (0.2 mm) in terms of flank strength and crater resistance at milling speeds of 20 m / min, 40 m / min, 120 m / min, 200 m / min, and 400 m / min and , therefore, it can be used in a practical way. As described above, when a bevel gear is generated by dry size and with the use of an annular cutter blade 21 applied with the knife material 23 applied with a high speed steel coated with a film having a composition of (TÍ0.5AI0.5) NyCd-y)) with a value y in the range of 0.2 and 1. 0 at a cutting speed of 400 m / min or less, the generation of teeth can be achieved with great efficiency at low cost. Even, it is even more preferable when the milling speed is from 40 to 120 m / min. A third embodiment of the gear cutting method of the present invention will be described. The size is realized without the supply of a blade lubricant (dry cutting) using a blade material 23 made with a high speed steel (SKH55) coated with a film with a thickness that varies in the range of 0.5 d of a composition comprising 1.7 μm as a knife material 23 of the annular cutter blade 21. A film thickness d is given when a single layer of (TÍ0.5AI0.5) μm is used or a total thickness is given when TiN is inserted 0.05 μm thick between them to form a multi-layer film. The blade material 23 has a point width P of 0.06 inches, a pressure angle S of 10 to 20 degrees, and directed in the straight direction. Furthermore, the main body of the annular cutter blade 21 has a size of 6 inches and the piece is made of an SCM435 material and the number of pieces that will be machined is 300. Figure 8 is a graph to determine a thickness appropriate coating (Ti0.5Al0.5), in which the axis of the abscissa represents the total thickness of the film. In the same figure, if the coating of (TÍ0.5AI0.5) is a single layer, the thickness of it is represented, while in the case of a multiple layer coating, the total of all the film thicknesses is represented. The axis of the ordinates represents the flank wear ratio, assuming that the flank wear of the knife material 23 having a single coating layer of (TÍ0.5AI0.5) N of 1.7 μm thickness is 1. In the case of a single-layer coating (TÍ0.5AI0.5) N, the flank wear ratio increases when the film thickness is less than 1 μm and close in the cases in which the film thickness is greater than 16 μm. In the case of a multi-layer coating of (TÍ0.5AI0.5) N, the wear decreases compared to the case of the single-layer coating. Therefore, it is preferable that the thickness of the film is in the range of 1 μm to 16 μm, and it is optional if the coating is single-ply or multi-ply. ~~ A fourth embodiment of the gear cutting method of the present invention will be described. The size is realized while the axial feed is varied without the supply of blade lubricant (dry cutting) using blade material 23 made with a high speed steel (SKH55) coated with a film layer of a composition comprising (Ti0.sAl0 s) N as the knife material 23 of the annular cutter blade 21. Furthermore, the knife material 23 has a point width P of 0.06 inches, a pressure angle S of 10 to 20 degrees, and directed in the straight direction. In addition, the main body of the annular cutter blade 21 has a size of 6 inches and the piece is made of an SCM435 material and the number of pieces to be machined is 300. Figure 9 shows the milling speeds in comparison with the axial speed falling within a practical range of flank wear and crater wear. As shown in the Figure, when the axial feed is 0.58 mm / bl, the wear is in the practical area up to a cutting speed of 360 m / min.

A fifth embodiment of the gear cutting method of the present invention will be described. The size is realized while changing the material of the piece without the supply of a lubricant for blades (dry cutting) using a material of blade 23 made with a high speed steel coated with "a layer of 1.7 μm thickness of a composition comprising (TÍ0.5AI0.5) N as the knife material 23 for the annular mill knife 21. Specifically, a range of milling speed is verified in which the dry size is effective (where it falls below a practical limit), using a variety of typical gear materials as a part, including carburized steels and cement steels (SCM435 or similar), carbon steels (S45C or similar), cast iron (FCD50 or similar) and different hardnesses. The blade material 23 has a point width P of 0.06 inches, a pressure angle S of 10 to 20 degrees, and directed in the straight direction, and even more, the main body of the ring bit knife 21 has a 6-inch size, and the number of parts that will be machined is 300. Figure 10 illustrates the materials of the part compared to the milling speeds that fall under a practical range of flank wear and crater wear. shown in the Figure, for carbon steels, the wear falls within the practical range of up to a cutting speed of 380 m / min.A sixth invention of the detailed gear method of the present invention will be described. that the blade material 23 is changed into five types of high speed steel without the supply of a blade lubricant (dry cutting) using a blade material 23 made with a high speed coated steel with a 1.7 μm thick layer of a composition comprising (TÍ0.5AI0.5) N as the knife material 23 for the annular cutter blade 21. Specifically, they were used as materials of knife material 23 SKH51, SKH55, high speed powder steels (1.6% C, 8%, 6% Mo, etc.), high speed powder steels (2.2% C, 12% W, 2.5% Mo, etc.), and high speed steels in powder (1.3% C, 6%, 5% Mo, etc.), as materials of the blade material 23 and an area of effective size velocity for the dry size was verified with respect to each of those materials. The blade material 23 has a point width P of 0.06 inches, a pressure angle S of 10 to 20 degrees, and directed in the straight direction. Furthermore, the main body of the annular cutter blade 21 has a size of 6 inches, and the part is made of an SCM435 material and the number of pieces that will be machined is 300.

Figure 11 illustrates the material types of the blade material 23 compared to the milling speeds that fall within, of a practical range in terms of flank wear and crater wear. As shown in the Figure, when the material of the blade material 23 is SKH51, the wear was found within practical range at a speed of up to 350 m / min. A seventh embodiment of the gear cutting method of the present invention will be described. The size was made while modifying the size of the main body 22 and the point width P of the blade material 23 without the supply of blade lubricant (dry cutting) using a blade material 23 made with a high-grade steel. speed coated with a 1.7 μm thick layer of a composition comprising (TÍ0.5AI0.5) N as the knife material 23 for the annular cutter blade 21. Specifically, the point width P was set at 0.06 inches when the size of the main body 22 of the annular cutter blade 21 was 6 inches, to 0.10 inches when the size of the main body 22 of the annular cutter blade 21 was 9 inches, and to 0.14 inches when the size of the main body 22 of the annular cutter blade 21 was 12 inches. The blade material 23 has a pressure angle S of 10 to 20 degrees, and is directed in the straight direction. In addition, the piece is made of an SCM435 material and the number of pieces that will be machined is 300. Figure 12 illustrates the size of the main body 22 of the annular cutter blade 21 compared to the size speeds that fall within a practical interval in terms of flank wear and crater wear. As the picture shows, the wear was found within the practical range under all conditions in terms of the size of the main body 22 and the width of point P of the knife material 23. Figures 14 and 15 illustrate the speeds of height compared to the wear "of the flank and crater wear in the case of the present invention where dry cutting was performed without the supply of a blade lubricant "using the blade material 23 made with a high speed steel as the basic material coated with a film of a composition comprising (Ti (1_x) Alx) (NyCd-y)): 0.2 x 0.85, 0.2 y, and in the case in which the cutting was performed with the supply of a prior art blade lubricant, respectively, as shown in the figures, it can be seen that in the case of the present invention, both flank wear and crater wear improved compared to the prior art, and wear progress is small, even at higher speed machining. Next, another example of the film "coating the blade material 23" will be described. Blade material 23 is used which is coated with TiAl nitride containing a nitride-forming element capable of forming a TiAl nitride or carbonitride. high quality. The TiAl nitride containing the nitride-forming element or the TiAl carbonitride coating the blade material 23 is used in a single layer and at least one layer of multiple layer coating. In this case, as nitride-forming elements, Zr, (zirconium), Hf (hafnium), Y (yttrium), V (vanadium), Nb (niobium), This agreement (tantalum), Si (silicon), Cr are applied. (chromium), Mo (molybdenum), W (tungsten), B (boron), Mg (magnesium), Ca (calcium) and Be (beryllium). Specifically, in the cases in which the nitride-forming element is represented by M, the blade material 23 used is coated with at least one layer of a film with a composition comprising substantially: (TizAlxM (? _ Z-x) ) (? _w) (NyC (? _ y) w (where, 0.2 x 0.85, 0.2 and 1.0, 0.15 z 0.8, 0.7 (z + x) <1.0 and 0.45 w .0.55) In addition, when specifying the interval of the value of x in (TizAlxM _z_x)) d_w) (NyC (1_y) wa 0.2 x 0.85 and the interval of the value y in 0.2 and 1.0, the interval of the z value is 1 to which is subtracted x ("z = 1- x) Therefore, TiAl, NC has the same composition range as in the previous case where no nitride-forming element M is added, and almost the same effects as shown by the results obtained in Figures 4 to 15 By adding the nitride-forming element M, the nitride-forming element M can replace TiAl and form a high-quality nitride, in the following, they will be described in detail with reference Figure 16 to 18 cases in which V (vanadium), B (boron) and Zr (zirconium) are applied as typical nitride forming elements M. Figure 16 shows a relationship between the speed of height and wear of the flank when small amounts of V and B are added, and Figure 17 shows a relationship between the speed of carving and flank wear when V, B and Zr are added in larger quantities than in Figure 16. In this case, the blade material 23 has a point of width P of 0.06 inches, a pressure angle S of 10 to 20 degrees and is directed in a straight direction. In addition, the main body 22 of the annular cutter blade 21 has a size of 6 inches and the part is a material of SCM435 and the number of pieces that will be machined is 300. As shown in Figure 16, when the material of blade 23 is coated with a film of the composition comprising (io.795Alo.2Vo.005) N, (Ti.i5Al0.8_5Vo.oos) N, (Ti0.sAlo.45B0.o5) (N0.9C0.1 ) as (TizAlxM (1.z_ x)) (iw) (yC (iy)) w the flank wear is below the practical wear limit (0.20 mm) at the size speeds of less than approximately 400 m / min. For this reason, high-efficiency, low-cost machining can be achieved without the addition of the nitride-forming element, even when they are added in small amounts of V and B as nitride-forming elements. Although not shown in the figure, it has also been confirmed that the wear of the crater falls below the practical wear limit. As shown in Figure 17, when the blade material 23 is coated with at least one layer of a film of the composition comprising (TÍ0.5AI0.4V0.1) N, (TÍ0.sAlo.2Vo.2) N, (Tío.4Alo.3Vo.3) N, (N0.7C0.3), (TÍ0.4Al0.3Zr0, 3), (N0.5C0.5) as (TizAl? M (? _ Z-?)) (1-w) (NyC (? - y) w, flank wear "is found by" below "the practical wear limit ( 0.20 mm) at the cutting speeds of less than about 400 m / min For this reason, high-efficiency, low-cost machining can be achieved without the addition of the nitride-forming element, even when V, B and Zr are added as nitride-forming elements in larger amounts than in Figure 16. Although not shown in the figure, it has also been confirmed that the wear of the crater falls below the practical wear limit, because if the amount of the nitride-forming element added exceeds 0.3 compared to the addition elements of the TiAl composition, it is likely that flaking of the film occurs, it is preferable that the amount of the added nitride forming element is 0.3 or less as compared to the composition of the added elements of TiAl.If the quantity of the element f added nitride buffer exceeds 0.3 compared to the composition of TiAl added elements (z + x is less than 0.7), that is, if the content of the nitride-forming element M is too large, the basic characteristics of TiAl deteriorate which causes the peeling of the film. Next, a case will be described in detail with reference to Figure 18 in which the proportions of the metallic elements (TiAl, and nitride-forming elements added) are varied with respect to non-metallic elements (N) including C. Figure 18 shows a relationship between the speed of the carving and the wear of the sidewall when the proportion of the composition of the metallic elements with respect to the non-metallic elements, including C, varies the interaval of 0.45 and 0.55. similar are the same as in the case shown in Figures 16 and 17. The coating film is a single layer with a film thickness of 1.7 μm As shown in Figure 18, when the knife material 23 is coated with at least one layer of a "film of composition (TÍ0.5AI0.4V0.1) 0.45N0.55, and (TÍ0.5AI0.4V0.1) 0.55N0.45 as (TizAl? M (i_z_x) aw) (NyC (? _ Y)) w, in any case, when the amount of the metallic elements is large or the amount of the non-metallic elements even C is large, flank wear falls below the practical wear limit (0.20m) at the cutting speeds close to about 400 m / min or less, reaching thus a machining of great efficiency and low cost. Although it is not shown in the figures also in regard to the wear of the rotor, it has been confirmed that the wear falls below the practical wear limit at the cutting speeds of about 400 m / min or less. In this case, the reason why the value w is adjusted to 0.45 w 0.55 is that if the value w is outside the range of 0.45 0.55, there is a fear that film flaking or deterioration of wear resistance will occur. . The ratio of (TizAlxM (? - z_x)) to (NyC (i_y)) w is normally 1: 1, however, it is not a problem even if the content of the non-metal elements, including C, decreases with respect to the amounts of Ti and Al as metallic elements and nitride forming elements 25 blade-type blade bars formed by detailed rod 63 are annularly mounted on the outer periphery of a disc-shaped main body 62, and the blade materials 63 are fixed in a main body 62 in a ring 71. The blade material 63 is provided with an outer blade 64 and an outer blade 65. As the blade material 63, as the blade material 23 described above, a blade material 63 is used. manufactured with a high speed steel coated with at least a portion of cylindrical size with .TiAl nitride or TiAl carbonitride. Even when the annular cutter blade 61 applied with the bar-type blade 63. , almost the same as with the annular cutter blade 23 described above, a "dry" high efficiency and low cost size can be achieved almost in the same way, since the knife material 63 is of the type of bar cutter formed by a rod, a polishing can be performed to form the cutting edge in the axial direction, the upper rake surface is not required for polishing, and an individual blade material can be used several times over a prolonged period of time. THE INDUSTRY The gear cutting method according to the invention described in Claim 1 is a gear cutting method for generating a bevel gear characterized in that when using a blade to cut helical gear bevel gears with a blade material made with steel for high speed tools mounted on the main body of a blade and coated with at least one layer of a film of a To composition comprising substantially TiAlN, teeth are generated by dry cutting without using blade lubricant at a cutting speed of the range of 20 to 400 m / min. With the present gear cutting method, teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example, a tool made of cemented carbide or the like. As a result, it is possible to perform gear cutting with great efficiency and low cost. The gear size method according to the invention described in Claim 2 is characterized in that the teeth of a bevel gear are generated using a helical tooth bevel gear cutting blade having a blade material made of high tool steel. speed mounted on a main body of the blades, the blade material being coated with at least one layer of a film of a composition comprising substantially: (TÍ (lX) Al?) (NyC (ly)) wherein, 0.2 x 0.85, 0.2 and 1.0 with the cutting speed in a range of 20 to 400 m / min, and the teeth being generated by dry cutting without using a blade lubricant at a much higher cutting speed without using any material from expensive blade, for example a blade made of cemented carbide or the like. ~ As a result, it is possible to perform gear cutting with great efficiency and low cost. The "gear size method" according to the invention described in Claim 3 is characterized in that the teeth of a bevel gear are generated using a blade to cut helical gear bevel gears with a knife material made with tool steel. high speed mounted on the main body of a blade, the blade material being coated with at least one layer of a film of a composition comprising substantially: (TizAl? M (1_z.?)) d_w) (NyCd-y )) w where, 0.2 0.85, 0.2 and 1.0 0.45 w 0.55, the milling speed being "in a range of 20 to 400 m / min, of a bevel gear and the teeth being generated by dry cutting without using a lubricant for blades at a much higher cutting speed without using any expensive blade material, for example a blade made of cemented carbide or the like. As a result, it is possible to perform gear cutting with great efficiency and low cost. In addition, N and C are in amounts equal to or greater than Ti and Al which are metallic elements, whereby the reinforcement of the coating film solution can be expected. The gear size method according to the invention described in Claim 4 is characterized in that the teeth of a bevel gear are generated using a helical tooth bevel gear cutting blade having a blade material made with tool steel. high speed mounted on the main body of a blade, wherein a nitride-forming element is represented by M, the blade material being coated with at least one layer of a film of a composition comprising substantially: (TizAlxM _z_x.) (iw) (NyC (iy)) w where, 0.2 x 0.85, 0.2 and 1.0 - - 0.15 z 0.8 0.7 (z + x) <; 1.0 0.45 w 0.55. "the cutting speed being in a range of 20 to 400 m / min, of a bevel gear and the teeth being generated by dry cutting without using a blade lubricant at a much higher cutting speed without using any expensive knife material For example, a blade made of cemented carbide or similar, in addition, N and C are in amounts equal to or greater than Ti and Al, which are metallic elements, whereby the reinforcement of the coating film solution can be expected. As a result of this, it is possible to realize the gearing of gears with great efficiency and low cost The gear-cutting method according to the invention described in Claim 6 is characterized in that the teeth are generated while air is blown in against the portion of carving to remove the waste of carving, which prevents the waste of the size from biting the piece, thus achieving the size of the gears with great efficiency and low cost. The gear cutting method according to the invention described in Claim 7 is characterized in that teeth are generated while air is blown against the carving portion in a direction along the rotating direction of the carving blade. Helical toothed bevel gears for blowing cuttings, and from the outer periphery to the center of the cutter to cut helically toothed bevel gears to blow milling debris from a space between the blade materials, and blow air cooling against the piece. This prevents that the waste of carving chop the piece and achieving the carving of gears with great efficiency and at low cost. The gear cutting method according to the invention described in Claim 8 is characterized in that the gear generated is a bevel gear used for an automotive reduction apparatus, therefore, a bevel gear for an automotive reduction apparatus can be generated with great efficiency and low cost. The gear carving apparatus of the invention described in Claim 9 is characterized in that the main tool arrow of a cutter head supporting a helical tooth bevel gear cutter supporting a cutter for carving helical bevel gears and an arrow for part supporting a part are arranged in such a way that their rotating central axes intersect each other, the cutter head is supported in such a way that it can rotate around a mechanical center, the cutter for carving helical gear bevel gears and the part is engaged with each other by rotating the arrow of the piece in collaboration with the rotation of the main arrow of the tool and the revolution of the blade head, wherein the blade for carving helical gear bevel gears has mounted on itself material of blade coated with at least one layer of a film of a composition comprising substantially TiAlN, the teeth are generated by dry cutting without using blade lubricant at a cutting speed in the range of 20 to 400 m / min, thus generating teeth of a bevel gear at a cutting speed much larger without using an expensive blade material, for example cemented carbide tool material or the like. As a result, it is possible to make the gear sizes with great efficiency and low cost. The gear-cutting apparatus of the invention described in Claim 10 is characterized in that the main tool arrow of a blade head supporting a conical gear blade with a helical toothing and an arrow for a part supporting part are arranged in such a manner so that its rotating central axes intersect with each other, the blade head is supported in such a way that it can rotate around a mechanical center, the blade for cutting conical gears with helical teeth and the part are interconnected by rotating the arrow of the piece in collaboration with the rotation of the main arrow of the tool and the revolution of the blade head, wherein the helical toothed bevel gear cutting blade has mounted on it blade material coated with at least one layer of a film of a composition comprising substantially: (Ti (1 _?) Alx) (NyC (iy)) "where, 0.2 x 0.85, 0.2 and 1.0, the cutting speed being in a range of 20 to 400 m / min, and the teeth being generated by dry cutting" without using a blade lubricant With the present apparatus, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade made with cemented carbide or similar. As a result, it is possible to make the gear sizes with great efficiency and low cost. The gear-cutting apparatus of the invention described in Claim 11 is characterized in that the main tool arrow of a cutterhead bearing a helical bevel gear cutter and an arrow for part supporting a workpiece are arranged in such a way that In such a way that its rotating central axes intersect each other, the blade head is supported in such a way that it can rotate around a mechanical center, the blade for carving helical toothed bevel gears and the part are engaged with each other by rotating the arrow the part in collaboration with the rotation of the main arrow of the tool and the revolution of the blade holder head, wherein the helical toothed bevel gear cutting blade has mounted on it blade material coated with at least one layer of a film of a composition comprising substantially: (Tid-x) Al?) (NyCd-y >; ) w where, 0.2 x 0.85, 0.2 and 1.0, 0.2 w 0.55, the cutting speed being in a range of 20 to 400 m / min, and the teeth being generated by dry cutting without using a blade lubricant. With the apparatus according to the present invention, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade made of cemented carbide or the like, and N and C are found in amounts equal to or greater than Ti and Al which are metallic elements, whereby the reinforcement of the coating film solution can be expected. As a result, it is possible to perform gear cutting with great efficiency and at low cost. The gear-cutting apparatus of the invention described in Claim 12 is characterized in that the teeth of a bevel gear are generated using a helical tooth bevel gear cutting blade having a blade material made of high speed tool steel assembled in a main body of the blades, the blade material being coated with at least one layer of a film of a composition comprising substantially: (Td _ ?, Alx) (NyCd_y)) w wherein, 0.2 x 0.85, 0.2 and 1.0 0.15 z 0.8 0.7 (z + x) < 1.0"0.45 w 0.55, the cutting speed being in a range of 20 to 400 m / min, and the teeth being generated by dry cutting without using a blade lubricant With the apparatus according to the present invention, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade made of cemented carbide or the like, thus achieving gear cutting with great efficiency and at low cost. ~ In addition, N and C are found in amounts equal to or greater than Ti and Al which are metallic elements, whereby the reinforcement of the coating film solution can be expected.The gear-cutting apparatus of the invention described in Claim 13 is characterized in that the size speed is in the range of 40 to 120 m / min, thus achieving gear size with great efficiency and low cost. of gears of the invention described in Claim 14 is characterized in that the teeth are generated while air is blown against the cutting portion to remove the grinding debris and the gear size is made while blowing air from the grinding mechanism. supply of air, thus preserving that the waste of size chop the piece and achieving the generation_ of a_ conical gear with grain efficiency and at low cost. The gear carving apparatus of the invention described in Claim 15 is characterized in that a first air nozzle is provided for blowing air to blow the milling waste against the milling portion in a direction along the direction rotary of the helically toothed conical blade, and a second nozzle for blowing air is provided to blow the carving waste from a space between the blade materials, and a third air nozzle is provided to blow the air to cool the air, thus preventing the size waste from biting the piece and achieving the generation of a bevel gear with great efficiency and low cost The gear cutting apparatus described in claim 16 is characterized in that the gear generated is a bevel gear used for an apparatus of automotive reduction, therefore, a bevel gear for a reduction device can be generated automotive with high efficiency and low cost, The helical toothed bevel gear cutting blade according to the invention described in Claim 17 is characterized in that the blade "for carving-gear is conical with helical toothing has mounted on it coated blade material with at least one layer of a film of a composition comprising substantially TiAlN, the teeth are generated by dry cutting without using lubricant for knives at a cutting speed in the range of 20 to 400 m / min. With the gear cutting blade according to the invention, teeth of a bevel gear can be generated at a much higher cutting speed without using an expensive blade material, for example cemented carbide tool material or the like, thereby achieving a cutting blade. gear size with great efficiency and low cost. The helicoidal toothed gear cutter blade according to the invention described in Claim 18 is characterized in that the helical toothed bevel gear cutting blade has mounted on it blade material coated with at least one layer of a film of a composition comprising substantially: (Tid_x) Alx) (NyC,? - y)) where, 0.2 x 0.85, 0.2 and 1.0, the cutting speed being in a range of 20 to 400 m / min, and the teeth being generated by Dry carving without using a blade lubricant. With the present apparatus, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade made of cemented carbide or the like. As a result, it is possible to perform gear cutting with great efficiency and at low cost. The helical toothed bevel gear cutting blade according to the invention described in Claim 19 is characterized in that the main tool arrow of a blade head that supports a helically toothed bevel gear blade and an arrow for part supporting a parts are arranged in such a way that their rotating central axes intersect each other, the knife head is supported in such a way that it can rotate around a mechanical center, the blade for carving helical bevel gear and the piece are interlocked with each other rotating the arrow of the part in cooperation with the rotation of the main arrow of the tool and the revolution of the blade head, wherein the blade for cutting helical gear bevel gear has mounted on it blade material coated with at least a layer of a film of a composition comprising ubstantially: (TÍd_x) Alx) (NyCd-y)) w where, 0.2 x 0.85, 0.2 and 1.0, "0.2 w 0.55, the cutting speed being in a range of 20 to 400 m / min, and the teeth being generated by dry cutting without using a blade lubricant. With the apparatus according to the present invention, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade made of cemented carbide or the like. As a result, it is possible to perform gear cutting with great efficiency and at low cost. In addition, N and C are in amounts equal to or greater than Ti and Al which are metallic elements, whereby the reinforcement of the coating film solution can be expected. The helical toothed bevel gear cutting blade according to the invention described in Claim 20 is characterized in that the teeth of a bevel gear are generated using a helical tooth bevel gear cutting blade having a blade material made of steel for cutting. high speed tools mounted on a main body of. the blades, the blade material being coated with at least one layer of a film of a composition comprising substantially: "(Ti_ (1_x) Alx) (NyCd-y) _) w where, 0.2 x 0.85, 0.2 and 1.0 0.15 z 0.8 0.7 (z + x) <; 1.0 _ 0.45 w 0.55; the cutting speed being in a range of 20 to 400 m / min, and the teeth being generated by dry cutting without using a blade lubricant. With the apparatus according to the present invention, the teeth of a bevel gear can be generated at a much higher cutting speed without using any expensive blade material, for example a blade made of cemented carbide or the like. As a result, it is possible to perform gear cutting with great efficiency and at low cost. In addition, N and C are in amounts equal to or greater than Ti and Al which are metallic elements, whereby the strength of the coating film solution can be expected. Given that in the helical tooth bevel gear cutting blade according to the invention described in Claim 21, the size speed is in the range of the size speed are in the range of 40 to 120 m / min, it is possible to perform the gear size with great efficiency and low cost.

Since the helical toothed bevel gear cutting blade of the invention described in Claim 22 is generated, air supply teeth are generated to blow air and blow the carcass waste against the milling portion, it is possible to generate conical blades with great efficiency and low cost without chopping the piece with the waste of the size. Since the helical toothed bevel gear cutting blade according to the invention described in Claim 23, teeth are generated while blowing air against the carving portion in a direction along the rotating direction of the blade for carve helical gear bevel gears "to blow the waste of the size, and from the outer periphery towards the center of the blade to carve helical gear bevel gears to blow the waste of the size from a space between the blade materials and It blows cooling air against the piece, it is possible to realize the generation of conical gears with great efficiency and at low cost without chopping the piece with the waste of the size.Since in the blade to carve helical gear conical gears in accordance with the invention described in Claim 24 the generated gear is a bevel gear used for an automotive reduction device, a bevel gear can be generated for an automotive reduction device with great efficiency and at a low cost.

Claims (24)

1. A method of gear sizes to generate a bevel gear characterized by using a blade to cut helical gear bevel gears with a blade material made of high-speed tool steel mounted on the main body of a blade and coated with at least one layer of a film of a composition comprising substantially TiAlN, teeth are generated by dry cutting without using blade lubricant at a cutting speed in the range of 20 to 400 m / min.

2. A method for gear cutting to generate a bevel gear characterized in that teeth of a "conical gear" are generated by using a blade-to carve helical gear bevel gears having a blade material made of high-speed tool steel mounted in a main body of the blades, the blade material being coated with at least one "layer" of a film of a composition comprising substantially: (Ti (1_x, Alx) (NyCd-y.) where, 0.2 x 0.85, 0.2 and 1.0 at a speed of height in a range of 20 to 400 m / min, and generating the teeth by dry cutting "without using a lubricant

3. A method for gear size to generate a gear conical characterized in that the teeth of a bevel gear are generated using a blade to cut bevel gear gears with a blade material made with high-grade tool steel The mounted on the main body of a blade, the blade material being coated with at least one layer of a film of a composition comprising substantially: (TizAlxM (1_z_x)) _w) (NyCd-y)) w wherein, 0.2 0.85, - 0.2 and 1.0 0.45 w 0.55. at a speed of sizes in a range of 20 to 400 m / min, and the teeth of a bevel gear are generated by dry cutting without using a blade lubricant. "

4. A method for gear cutting to generate a bevel gear characterized in that the teeth of a bevel gear are generated using a helical tooth bevel gear cutting blade having a blade material made of high speed tool steel assembled in the main body of a blade, wherein a nitride-forming element is represented by M, the blade material being coated with at least one layer of a film of a composition comprising substantially: "(TizAlxM (1_z_x)) ( 1_w) (NyCd-y.) W where, 0.2 x 0.85, 0.2 and 1.0 0.15 z 0.8 0.7 (z -tx) < 1.0 0.45 w 0.5

5. at a cutting speed in a range of 20 to 400 m / min, of a bevel gear and generating the teeth by dry cutting without using a lubricant. 5. A method for gear cutting claimed in any of Claims 1 to 4, wherein the speed of size is in a range of 40 to 120 m / min.

6. A method for gear cutting claimed in any of Claims 1 to 5, wherein the teeth are generated while blowing air against a size portion to remove the waste of the size. A method for gear cutting claimed in any of Claims 1 to 6, wherein "generate teeth while blowing air against the carving portion in a direction along the rotational direction of the Helical toothed bevel gear cutter for blowing carving waste, and from the outer periphery to the center of the cutter for carving helical gear bevel gears to blow milling waste from a space between the knife materials, and blows cooling air against the piece 8. A method for gear cutting claimed in any of Claims 1 to 7, wherein the gear generated is a bevel gear used for an automotive reduction device. 9. A method for gear cutting to generate a bevel gear characterized in that the main arrow of the tool of a cutter head supports a helical tooth bevel gear cutter supporting a cutter for carving helical gear bevel gears and a arrow for part that supports a part are arranged in such a way that their rotating central axes intersect each other, the blade head is supported in such a way that it can rotate around a mechanical center, the blade for carving helical gearing bevel gears and the piece are interlocked by rotating the arrow of the piece in collaboration with the rotation of the arrow of the tool and the revolution of the cutter head, wherein the helical toothed bevel gear cutter has mounted on it a knife material coated with at least one layer of a film of a composition substantially comprising TiAlN, the teeth are generated by dry cutting without the use of lubricant for knives at a cutting speed in the range of 20 to 400 m / min. 10. A method for gear cutting to generate a bevel gear characterized in that the main tool arrow of a cutter head that supports a helical bevel gear cutter and an arrow for part supporting part are arranged in such a manner that its rotating central axes intersect each other, the blade head is supported in such a way that it can rotate around a mechanical center, the blade for cutting conical gears of helical tooth and the part are engaged with each other by rotating it. arrow of the part in collaboration with the rotation of the main arrow of the tool and the revolution of the blade head, wherein the blade for cutting helical gear bevel gearing has mounted on itself blade material coated with at least one layer of a film of a composition comprising substantially: (TÍ (1 _?) Al?) (NyCd-y)) W where, 0.2 x 0.85, 0.2 and 1.0, the cutting speed being in a range of 20 to 400 m / min, and teeth are generated by dry cutting without using a blade lubricant. 11. An apparatus for the gear cutting to generate a bevel gear which is characterized in that the main arrow of the tool of a blade head supporting a helical bevel gear blade and an arrow for part supporting a part are arranged in such a way that its rotating central axes intersect each other, the blade head is supported in such a way that it can rotate around a "mechanical center, the blade for cutting conical gears with helical toothing and the part is engaged with each other by rotating the arrow of the part in cooperation with the rotation of the main arrow of the tool and the revolution of the knife-holder head, wherein the helical-toothed bevel-gear cutting blade "has mounted on it a knife-coated material with at least one layer of a film of a composition comprising substantially: (TÍ (? -?) Alx) (NyCd-y.) w in do nde, 0.2 x 0.85, 0.2 and 1.0, 0.2 w 0.55, the cutting speed being in a range of 20 to 400 m / min, and the teeth being generated by dry cutting without using a blade lubricant. 12. An apparatus for gear cutting to generate a bevel gear characterized in that the teeth of a bevel gear are generated using a blade for "carving helical bevel gears having a blade material made of high-tool steel. speed mounted on a main body of the blades, the blade material being coated with at least one layer of a film of a composition comprising substantially: (TÍ (1 _?) Al?) (NyCd-y)) w where, 0.2 x 0.85, 0.2 and 1.0 0.15 z 0.8 0.7 (z + x) <; 1.0 0.45 W 0.55; at a cutting speed in a range of 20 to 400 m / min, and teeth are generated by dry cutting without using a blade lubricant. 13. A gear-cutting apparatus as claimed in any of Claims 9 to 12, wherein the speed of size is in a range of 40 to 120 m / min. A gear-cutting apparatus as claimed in any of Claims 9 to 13, wherein the air supply mechanism is provided for blowing air to blow the waste of size against a cutting portion. 15. A gear-cutting apparatus as claimed in any of claims 9 to 14, wherein a first air nozzle is provided for blowing air to blow the milling waste against the milling portion in one direction along of the rotary direction of the helical toothed blade, and a second nozzle is provided for blowing air to blow the milling debris from a space between the blade materials, and a third air nozzle is provided to blow the air to cool the air. 16. The gear-cutting apparatus claimed in any of Claims 9 to 15, wherein the gear generated is a bevel gear used for an automotive reduction apparatus. 1

7. A helical toothed bevel gear cutting blade characterized in that the helical gear bevel gear cutting blade has mounted on it blade material coated with at least one layer of a film of a composition comprising substantially TiAlN, teeth are generated by dry cutting "without the use of lubricant for knives at a cutting speed in the range of 20 to 400 m / min." 1

8. A blade for carving helical gear bevel gears characterized by a knife material the helical toothed bevel gear cutting blade has mounted on it blade material coated with at least one layer of a film of a composition comprising substantially: (X-Th) A1X) (NyCd-y)) where, 0.2 x 0.85, 0.2 and 1.0, the cutting speed being in a range of 20 to 400 m / min, and the teeth being generated by dry cutting without using A lubricant for blades. 1

9. Nail cutting blade for helically toothed bevel gearing characterized in that the main arrow of the tool of a blade head that supports a helical toothed bevel gear blade and an arrow for part supporting a part are arranged in such a way that its rotating central axes intersect each other, the blade head is supported in such a way that it can rotate around a mechanical center, the blade "for cutting conical gears with helical toothing and the part are engaged with each other by rotating the arrow of the piece in collaboration with the rotation of the main arrow of the tool and the revolution of the knife-holder head, wherein the helical-toothed bevel-gear cutting blade has mounted on it a blade material coated with at least one layer of a film of a composition comprising substantially: (TIA-x) Alx) (NyCa-y)) w where, 0. 2 x 0.85, 0.2 and 1.0, 0.2 w 0.55, the cutting speed being in a range of 20 to 400 m / min, and the teeth being generated by dry size without using a blade lubricant. 20. A helical toothed bevel gear cutting blade characterized in that the teeth of a bevel gear are generated using a helical tooth bevel gear cutting blade having a blade material made of high speed tool steel mounted on a main body of the blades, the blade material being coated with at least one layer of a film of a composition comprising substantially: (TÍ (1-X) A1X) (NyCd-y)) W wherein, 0.2 x 0.85, 0.2 and 1.0 0.15 z 0.8 0.7 (z + x) <; 1.0"~~ 0.45 w 0.55, the cutting speed being in a range of 20 to 400 m / min, and the teeth being generated by dry cutting without the use of a blade lubricant 21. A blade for cutting bevel gear gears helical claimed in any of the Claims 17 to 20, wherein the speed of size is in a range of 40 to 120 m / min. 22. A helical toothed bevel gear cutting blade as claimed in any of Claims 17 to 21, wherein the teeth are generated while blowing air to blow the carving powder against a carving portion. 23. A helical toothed bevel gear cutting blade as claimed in any of Claims 17 to 22, wherein teeth are generated while blowing air against the carving portion in a direction along the length of the rotating direction of the blade. to carve helical gear bevel gears to blow the size waste, and from the outer periphery to the center of the blade to cut helical gear bevel gears to blow the waste of the size from a space between the knife materials and cooling air is blown against the piece. 24. A helical bevel gear cutting blade as claimed in any of Claims 17 to 23, wherein the gear generated is a bevel gear used for an automotive reduction apparatus.